JP4611402B2 - Composite bottom dam in Tameike dike - Google Patents

Composite bottom dam in Tameike dike Download PDF

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JP4611402B2
JP4611402B2 JP2008144303A JP2008144303A JP4611402B2 JP 4611402 B2 JP4611402 B2 JP 4611402B2 JP 2008144303 A JP2008144303 A JP 2008144303A JP 2008144303 A JP2008144303 A JP 2008144303A JP 4611402 B2 JP4611402 B2 JP 4611402B2
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water
pipe structure
rigid pipe
basin
flexible
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JP2009287365A (en
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義人 田中
康一 藤田
永市 常友
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Hokukon Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters

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Description

本発明は、溜池の堤体における複合型底樋に関するものであり、より詳しくは、剛構造の管路構造物と柔構造の管路構造物とを連結して構築されることを基本として、長期間に亘って安定構造を維持し、漏水を抑制して取水を確実に行うことのできる溜池の堤体における複合型底樋に関するものである。   The present invention relates to a composite bottom gutter in a dam body of a pond, and more specifically, on the basis of being constructed by connecting a rigid pipe structure and a flexible pipe structure, The present invention relates to a composite bottom gutter in a dam body of a basin that can maintain a stable structure over a long period of time and can reliably take in water by suppressing leakage.

溜池の堤体における底樋は、該堤体の構造的な安定性を長期間に亘って確保させると共に、該堤体における漏水を抑制して溜池における取水を確実に行わせ、然も、溜池の底部に堆積した泥状物の排除を容易且つ確実に行わせる上で、非常に重要な構造物と言える。ここに溜池ａの堤体ｂは、図２８に示すように、全体が土構造物であって断面外形が台形状を呈しており、溜池側（内側部分）をなす、溜池の水が漏水するのを防止するように構成された透水性の低い遮水性ゾーンｃと、該遮水性ゾーンｃの外側部分をなす、現地で産出される土を盛土してなる本体ゾーンｄとから構成されている。   The bottom wall of the dam body ensures the structural stability of the dam body over a long period of time, and prevents water leakage in the dam body to ensure intake of water in the pond. It can be said that this is a very important structure in order to easily and surely remove the mud accumulated on the bottom of the steel. As shown in FIG. 28, the dam body b of the basin a is a soil structure as a whole and has a trapezoidal cross section, and the pond water (inner side) is leaked. A water-impervious zone c having a low water permeability configured to prevent the occurrence of water and a main body zone d which forms an outer portion of the water-impervious zone c and is embanked with soil produced locally. .

そして、かかる底樋としては従来、主として図２８に示すような、全体を剛構造の剛管路構造物ｅを用いて構築した剛構造の底樋ｆと、図３０に示すような、全体を柔構造の柔管路構造物ｇを用いて構築した柔構造の底樋ｈの２つのタイプがあった。   Conventionally, as the bottom rod, a rigid bottom rod f constructed by using a rigid pipe structure e having a rigid structure as shown mainly in FIG. 28 and a whole as shown in FIG. There were two types of bottoms h of a soft structure constructed using a soft structure jugway structure g.

該剛構造の底樋ｆは、図２８に示すように、構築せんとする堤体ｂの下端部分を水平に横切るようにヒューム管を接続状態に敷設して後、その周囲を取り囲むように鉄筋を組立て、その後、現場打ちコンクリートを打設して全体を一体化して剛管路構造物ｅを構築してなるものであり、該剛管路構造物ｅは、その延長方向に略２０ｍの間隔を置いて２〜３箇所、可撓性目地部ｋが設けられていた。そして該剛管路構造物ｅの、堤体ｂの溜池側をなす前記遮水性ゾーンｃに存する部分で、その外面ｍに密着した状態で該剛管路構造物ｅを周方向に取り囲むようにコンクリート製の止水壁部ｎが設けられており、該止水壁部ｎは、該底樋に沿った水の流れを遮水する機能を有していた。   As shown in FIG. 28, the bottom ridge f of the rigid structure is a reinforcing bar that surrounds the periphery of the fume tube laid in a connected state so as to horizontally traverse the lower end portion of the dam body b to be constructed. After that, the cast-in-place concrete is casted and the whole is integrated to construct the rigid pipe structure e. The rigid pipe structure e is spaced at an interval of about 20 m in the extending direction. 2 to 3 places, flexible joints k were provided. The rigid pipe structure e is surrounded by the circumferential surface of the rigid pipe structure e in a state where the rigid pipe structure e is in close contact with the outer surface m at the portion of the water-impervious zone c that forms the reservoir side of the bank b. A water blocking wall portion n made of concrete was provided, and the water blocking wall portion n had a function of blocking water flow along the bottom wall.

又、前記剛管路構造物ｅの溜池側の内端部ｐは取水構造物ｑに連結されており、該取水構造物ｑには、図２９に示すように、溜池ａで開放され且つ、上下動する扉体ｓにより開閉可能となされた排泥用開口部ｔが設けられてなり、該扉体ｓが開放されることによって、溜池ａの底部に堆積した泥状物を排除できるようになされていた。又、該取水構造物ｑの上部分ｕには、前記堤体ｂの内側部分において傾斜状態で配設された取水用の斜樋ｖの下端樋部ｗが連結されており、該斜樋ｖに設けられた取水バルブｙを操作軸ｚの回転操作により開くことによって該斜樋ｖ内に貯留水を流入させ、これを前記下端樋部ｗから前記取水構造部ｑ内に流入させることにより、溜池ａの貯留水を前記剛管路構造物ｅを通してその外端の排出口ａ１で堤体外に排出させ得るように構成されていた。   Further, the inner end portion p of the rigid pipe structure e on the reservoir side is connected to a water intake structure q, and the water intake structure q is opened at the reservoir a as shown in FIG. A mud opening t that is openable and closable by a vertically moving door body s is provided. By opening the door body s, mud accumulated on the bottom of the reservoir a can be removed. It was made. In addition, the upper portion u of the water intake structure q is connected to a lower end flange w of a water intake slope v disposed in an inclined state in the inner portion of the dam body b. By opening the intake valve y provided on the operation shaft z by rotating the operation shaft z, the stored water is caused to flow into the inclined rod v, and this is allowed to flow into the intake structure portion q from the lower end flange portion w, The water stored in the reservoir a was configured to be discharged out of the dam body through the rigid pipe structure e through the discharge port a1 at the outer end thereof.

一方前記柔構造の底樋ｈは、図３０に示すように、構築せんとする堤体ｂの下端部分を水平に横切るように、鋳鉄管や樹脂管（４〜５ｍ程度の長さを有するもの）を、例えばソケット継手等の凹凸の嵌め合わせ構造からなる可撓性継手部ａ２を介して順次接続して配設することにより柔管路構造物ｇを構築してなるものであった。   On the other hand, as shown in FIG. 30, the flexible structure bottom ridge h has a cast iron pipe or a resin pipe (having a length of about 4 to 5 m) so as to horizontally traverse the lower end portion of the bank body b to be constructed. ) Are sequentially connected and arranged through a flexible joint portion a2 having a concave-convex fitting structure such as a socket joint, for example, to construct a soft duct structure g.

そして該柔管路構造物ｇの、堤体ｂの溜池側をなす前記遮水性ゾーンｃに存する部分で、その外面ａ３に密着した状態で該柔管路構造物ｇを周方向に取り囲むようにコンクリート製の止水壁部ａ４が設けられており、該止水壁部ａ４は、該底樋に沿った水の流れを遮水する機能を有していた。   And in the part which exists in the said water-impervious zone c which makes the pond side of the dam body b of this soft pipe structure g, it surrounds this soft pipe structure g in the circumferential direction in the state closely_contact | adhered to the outer surface a3. A water blocking wall portion a4 made of concrete was provided, and the water blocking wall portion a4 had a function of blocking water flow along the bottom wall.

又、前記柔管路構造物ｇの溜池側の内端部ａ５は取水構造物ａ６に連結されている。該取水構造物ａ６には、図３１に示すように、溜池ａで開放され且つ、上下動する扉体ａ７により開閉可能となされた排泥用開口部ａ８が設けられてなり、該扉体ａ７が開放されることによって、溜池ａの底部に堆積した泥状物を排除できるようになされていた。又、該取水構造物ａ６の上部分ａ９には、前記堤体ａの内側部分において傾斜状態で配設された取水用の斜樋ａ１０の下端樋部ａ１１が連結されており、該斜樋ａ１０に設けられた取水バルブａ１２を操作軸ａ１３の回転操作により開くことによって該斜樋ａ１０内に貯留水を流入させ、これを前記下端樋部ａ１１から前記取水構造物ａ６内に流入させることにより、溜池ａの貯留水を前記柔管路構造物ｇを通してその外端の排出口ａ１４で堤体外に排出させ得るように構成されていた。   Further, the inner end a5 on the reservoir side of the soft duct structure g is connected to a water intake structure a6. As shown in FIG. 31, the water intake structure a6 is provided with a mud opening a8 that is opened by a reservoir a and that can be opened and closed by a vertically moving door a7. Is opened so that the muddy matter deposited on the bottom of the reservoir a can be removed. Further, the upper portion a9 of the water intake structure a6 is connected to a lower end flange portion a11 of a water intake slope a10 disposed in an inclined state in the inner portion of the bank body a, and the slope a10 By opening the intake valve a12 provided to the rotary shaft by operating the operation shaft a13, the stored water flows into the inclined shaft a10, and this flows into the intake structure a6 from the lower end flange portion a11. It was comprised so that the stored water of the reservoir a could be discharged | emitted out of a dam body through the said soft pipe structure g at the discharge port a14 of the outer end.

しかしながら、かかる従来の剛構造の底樋ｆや柔構造の底樋ｈによるときには次のような問題点があった。   However, there are the following problems when using such a conventional rigid structure bottom f and flexible structure bottom h.

〔１〕剛構造の底樋の問題点
前記堤体ｂは、前記のように全体が土構造物であって、溜池側としての内側部分をなす遮水性ゾーンｃと、該遮水性ゾーンｃの外側部分をなす本体ゾーンｄとから構成されており、該遮水性ゾーンｃを構成する土と該本体ゾーンｄを構成する土は、圧縮による沈下等の性状が異なる。そのため、施工現場でコンクリートを打設して構築してなる前記剛管路構造物ｅを用いる剛構造の底樋ｆによるときは、前記遮水性ゾーンｃと前記本体ゾーンｄとの境界部分でせん断力が作用して該剛管路構造物ｅが破損する問題が発生した。又、該遮水性ゾーンｃと該本体ゾーンｄにおける沈下の度合いによって該剛管路構造物ｅの周辺に隙間が生じ、この隙間を通して溜池の貯留水が漏水する現象が発生した。 [1] Problems with the bottom of a rigid structure The dam body b is a soil structure as described above, and includes a water-impervious zone c that forms an inner portion as a pond side, It is comprised from the body zone d which comprises an outer part, and the soil which comprises this water-impervious zone c and the soil which comprises this body zone d differ in properties, such as settlement by compression. Therefore, when using the rigid bottom f of the rigid pipe structure e that is constructed by placing concrete at the construction site, shearing occurs at the boundary between the water-impervious zone c and the main body zone d. There was a problem that the rigid pipe structure e was damaged by the force. Further, a gap was generated around the rigid pipe structure e depending on the degree of subsidence in the water-impervious zone c and the main body zone d, and a phenomenon in which the stored water in the reservoir was leaked through the gap.

なお前記のように、該剛管路構造物ｅには、その延長方向に略２０ｍの間隔を置いて２〜３箇所、可撓性目地部ｋが設けられてはいるが、前記沈下に追従し難い場合が生じ、該剛管路構造物ｅの破損や漏水現象を防止できない問題があった。   As described above, the rigid pipe structure e is provided with 2 to 3 flexible joints k at intervals of approximately 20 m in the extending direction, but follows the settlement. In some cases, it is difficult to prevent damage to the rigid pipe structure e and water leakage.

又、前記堤体ｂの形状からする剛管路構造物ｅの破損の問題もあった。即ち、該堤体ｂは断面外形が台形状を呈するため、土構造物である該堤体の沈下が不均一に発生することになり、従って、剛管路構造物ｅに堤体の土から作用する荷重が異なり、一体化した長い剛管路構造物ｅの一部分に集中荷重が作用して剛管路構造物の破損を招き、該剛管路構造物がその機能が果たせなくなる問題も発生した。かかる集中荷重の作用によって剛管路構造物が破損しないまでも、その周辺に隙間が発生し、この隙間を通して溜池の貯留水が漏水する現象が発生することにもなった。   There was also a problem of breakage of the rigid pipe structure e made of the shape of the bank body b. That is, since the cross-sectional outer shape of the levee body b has a trapezoidal shape, subsidence of the dam body, which is a soil structure, occurs unevenly. The acting load is different and a concentrated load acts on a part of the integrated long rigid pipe structure e, causing damage to the rigid pipe structure and causing the problem that the rigid pipe structure cannot perform its function. did. Even if the rigid pipe structure is not damaged by the action of the concentrated load, a gap is generated around the rigid pipe structure, and a phenomenon occurs in which the water stored in the reservoir is leaked through the gap.

〔２〕柔構造の底樋の問題点
前記した柔管路構造物ｇを具える柔構造の底樋ｈにあっては、土構造物である前記堤体の沈下に追従して該柔管路構造物ｇが下方に向けて緩やかに湾曲変形できるため、前記した剛管路構造物ｅにおけるように破損したり、管路構造物の周囲に隙間が生じて漏水しやすいという問題は発生しにくい。 [2] Problem of flexible structure bottom wall In the flexible structure bottom wall h provided with the above-described flexible pipe structure g, the flexible pipe follows the subsidence of the dam body which is a soil structure. Since the road structure g can be curved and deformed gently downward, problems such as breakage as in the above-described rigid pipe structure e and the possibility of water leakage due to the formation of a gap around the pipe structure occur. Hateful.

しかしながら、前記鋳鉄管を、凹凸の嵌め合わせ構造からなる可撓性継手部ａ２を介して順次接続することによって柔管路構造物を構築してなる場合にあっては、鋳鉄管そのものは可撓性を有さず、継手部だけが可撓性を有するため、土の沈下に追従して柔管路構造物ｇが下方に向けて緩やかに撓み変形するということができず、４〜５ｍ毎の可撓性継手部ａ２で屈曲して追従することになる。そのため、該鋳鉄管の周辺に間隙が生じやすく、この間隙を通して溜池の貯留水が漏水する問題があった。又、該鋳鉄管は外形形状が円形であるために、該鋳鉄管の底部側への土の充填が難しくこの下側の充填部分に隙間が生じやすく、この隙間を通して漏水しやすい問題もあった。   However, in the case where a soft pipe structure is constructed by sequentially connecting the cast iron pipes via a flexible joint portion a2 having an uneven fitting structure, the cast iron pipe itself is flexible. Since only the joint portion is flexible, it cannot be said that the soft duct structure g gently bends and deforms downward following the settlement of the soil every 4 to 5 m. The flexible joint portion a2 bends and follows. Therefore, there is a problem that a gap is easily generated around the cast iron pipe, and the stored water in the reservoir is leaked through the gap. Further, since the cast iron pipe has a circular outer shape, it is difficult to fill the bottom of the cast iron pipe with a gap easily in the lower filling portion, and there is a problem that water is likely to leak through the gap. .

一方、前記樹脂管を、凹凸の嵌め合わせ構造からなる可撓性継手部ａ２を介して順次接続することによって柔管路構造物ｇを構築してなる場合は、継手部が可撓性を有することに加えて該樹脂管自体が可撓性を有するため、該柔管路構造物ｇの全体が土の沈下に緩やかに追従できる。かかることから、該柔管路構造物ｇの周辺に隙間が生じにくい。しかしながらこの場合は、該柔管路構造物ｇがその全体に亘って緩やかに湾曲変形するために、その溜池側に設けられている前記止水壁部ａ４が該柔管路構造物ｇの湾曲変形に引きずられて、垂直面内で回転方向に変形して該止水壁部ａ４の周辺に隙間が生じ、この隙間を通して溜池の貯留水が漏水する問題があった。   On the other hand, in the case where the flexible pipe structure g is constructed by sequentially connecting the resin pipes via the flexible joint part a2 having an uneven fitting structure, the joint part has flexibility. In addition, since the resin pipe itself has flexibility, the entire flexible pipe structure g can gently follow the settlement of the soil. For this reason, it is difficult for a gap to be generated around the soft duct structure g. However, in this case, since the soft duct structure g is gently curved and deformed over the whole, the water blocking wall portion a4 provided on the reservoir side is curved by the soft duct structure g. There was a problem that the water stored in the reservoir was leaked through the gap due to the deformation and the deformation in the rotation direction within the vertical plane to create a gap around the water blocking wall portion a4.

更には、該柔管路構造物ｇの湾曲変形に伴って前記取水構造部ａ６が傾く場合も生じ、該取水構造部ａ６に対する前記斜樋の下端接続部分ａ１５が破壊されて、該取水構造部ａ６への貯留水の流入が不可能の事態を招いたり、該取水構造物が傾くことに伴い前記扉体の上下動作が阻害され、該扉体の開閉が円滑に行い難くなったり、該扉体が前記排泥用開口部を閉じた状態における止水性能が悪化する問題を招来した。   Furthermore, the water intake structure a6 may be tilted with the curved deformation of the soft pipe structure g, and the lower end connection portion a15 of the inclined wall with respect to the water intake structure a6 is destroyed, so that the water intake structure The inflow of stored water to a6 may be impossible, or when the intake structure is tilted, the vertical movement of the door body is hindered, making it difficult to smoothly open and close the door body. The problem that the water stoppage performance in the state which the body closed the said opening part for waste mud deteriorated.

加えて、樹脂管は円形管で軽量であるため、構築された柔管路構造物ｇの周囲に土を充填して底樋を土中に埋設する際、該柔管路構造物ｇの底部側への土の充填が難しく、その周辺に隙間が生じやすく該隙間を通して漏水する問題があった。前記のように遮水性ゾーンｃは、溜池の貯留水が漏水するのを確実に防止できる安定性を要求されるのであるが、該遮水性ゾーンｃでかかる隙間が生じて漏水しやすいことは、堤体の底樋として重大な欠陥であった。   In addition, since the resin pipe is a circular pipe and lightweight, when the soil is filled around the constructed flexible pipe structure g and the bottom wall is embedded in the soil, the bottom of the flexible pipe structure g There was a problem that it was difficult to fill the soil to the side, and a gap was likely to be formed around the side, causing water to leak through the gap. As described above, the water-impervious zone c is required to have stability capable of reliably preventing the water stored in the pond from leaking. It was a serious defect as the bottom of the levee body.

特開２００７−２３１５３１号公報（図１、図４）JP 2007-231531 A (FIGS. 1 and 4)

本発明は前記従来の問題点に鑑みて開発されたものであり、長期間に亘って安定構造を維持し、漏水を抑制して取水を確実に行うことができ、又、溜池の保守管理を確実に行うことを可能とする、溜池の堤体における複合型底樋の提供を課題とするものである。   The present invention has been developed in view of the above-mentioned conventional problems, can maintain a stable structure over a long period of time, can reliably perform water intake by suppressing water leakage, and can maintain a pond. It is an object to provide a composite bottom gutter in a pond body that can be reliably performed.

前記課題を解決するため本発明は以下の手段を採用する。
即ち本発明に係る溜池の堤体における複合型底樋（以下複合型底樋という）は、溜池の堤体の下端部分に該下端部分を水平に横切るように設けられて溜池の貯留水を排出可能とする、溜池の堤体における複合型底樋であって、前記堤体の溜池側としての内側部分をなす、溜池の貯留水が漏水するのを防止する遮水性ゾーンで構築された剛構造の剛管路構造物に、可撓性連結部を介して、堤体の前記遮水性ゾーンの外側部分をなす本体ゾーンで構築された柔構造の柔管路構造物を連結してなる。そして前記剛管路構造物は、下面が平坦であり且つ軸線方向に水路が設けられたコンクリート製の暗渠であり、又、該管路構造物の長さ方向の中間部位に、該中間部位を周方向に取り囲むように該中間部位の外面で突設されたコンクリート製の遮水鍔部を有する遮水壁部が設けられてなり、該剛管路構造物の、前記溜池側の内端部は取水構造物に連結されている。該取水構造物には、前記溜池で開放され且つ扉体により開閉可能となされた排泥用開口部が設けられてなり、又、該取水構造物の上部分には、前記堤体の内側部分において配設された、前記貯留水を取水するための樋体の下端樋部が連結されている。又、前記柔管路構造物は、可撓性を有する樹脂管相互を可撓性継手部を介して順次連結することにより構成されており、該柔管路構造物の内端部は前記可撓性連結部を介して前記剛管路構造物に連結されると共にその外端は、堤体外に前記貯留水を排出するための排出口とされていることを特徴とするものである。 In order to solve the above problems, the present invention employs the following means.
That is, the composite bottom basin (hereinafter referred to as the composite bottom basin) according to the present invention is provided at the lower end portion of the basin dam body so as to horizontally traverse the lower end portion, and discharges the stored water of the basin. Rigid structure constructed with a water-impervious zone that prevents the leakage of the water stored in the basin, which is a composite bottom basin in the basin of the basin, and forms an inner part as the basin side of the dam A flexible pipe structure constructed by a main body zone that forms an outer portion of the water-impervious zone of the dam body is connected to the rigid pipe structure having a flexible structure. The rigid pipe structure is a concrete culvert with a flat bottom surface and a water channel provided in the axial direction, and the intermediate part is disposed at an intermediate part in the length direction of the pipe structure. A water-impervious wall portion having a concrete water-impervious ridge projecting from the outer surface of the intermediate portion so as to surround in the circumferential direction, and the inner end of the rigid conduit structure on the reservoir side Is connected to the intake structure. The intake structure is provided with a mud opening that is opened in the reservoir and can be opened and closed by a door body, and the upper portion of the intake structure is an inner portion of the dam body. The lower end flange of the housing for taking in the stored water, which is disposed at, is connected. The flexible pipe structure is constructed by sequentially connecting flexible resin pipes via flexible joints, and the inner end of the flexible pipe structure is the above-mentioned acceptable pipe structure. It is connected to the rigid pipe structure through a flexible connecting portion, and its outer end is a discharge port for discharging the stored water to the outside of the bank body.

前記複合型底樋において、前記剛管路構造物を、プレキャストコンクリート製であり且つ軸線方向に水路が設けられた暗渠ブロックの複数個を水密に接合一体化して構築されたものとし、該暗渠ブロックが、プレキャストコンクリート製の支持板で支持されると共に、隣り合う支持板間に、ベントナイト又は、ベントナイトが混合された混合充填材が充填されたものとして構成するのがよい。   In the composite bottom fence, the rigid pipe structure is constructed by joining a plurality of underdrain blocks made of precast concrete and provided with water paths in the axial direction in a watertight manner. However, it is good to comprise as what is supported by the support plate made from a precast concrete, and between the adjacent support plates filled with the bentonite or the mixed filler with which bentonite was mixed.

前記各複合型底樋において、前記遮水壁部は、前記剛管路構造物の延長方向で見て前後に分割された、プレキャストコンクリート製の前壁部材と後壁部材との間で、前記暗渠ブロックの連結部に介在された遮水シートを挾持したものとし、該遮水シートは、前記剛管路構造物の水路に連通する連通孔を有したものとし、該連通孔の周縁部分は、前記暗渠ブロック間で挾持された状態にあり、又、前記前壁部材と前記後壁部材とは連結一体化されたものとして構成するのがよい。   In each of the composite-type bottom gutters, the water-impervious wall portion is divided between the front wall member and the rear wall member made of precast concrete, which are divided in the front and rear direction when viewed in the extending direction of the rigid pipe structure. It is assumed that the water shielding sheet interposed between the connecting portions of the culvert block is held, and the water shielding sheet has a communication hole communicating with the water channel of the rigid pipe structure, and the peripheral portion of the communication hole is It is preferable that the front wall member and the rear wall member are connected and integrated with each other.

本発明は以下の如き優れた効果を奏する。
(1) 本発明に係る複合型底樋は、漏水しにくい遮水性ゾーンで、下面が平坦な剛管路構造物を構築し、該鋼管路構造物に、可撓性連結部を介して、本体ゾーンで構築される柔管路構造物を連結した構成を有している。従って本発明によるときは、長期間に亘って安定構造を維持し、漏水を抑制して止水を確実に行うことができ、然も、溜池の底部に堆積した泥状物の排除を容易且つ確実に行わせることができる。以下、これをより具体的に説明する。 The present invention has the following excellent effects.
(1) The composite bottom gutter according to the present invention is a water-impervious zone that is difficult to leak, and a rigid pipe structure having a flat bottom surface is constructed, and the steel pipe structure is provided with a flexible connecting portion. It has the structure which connected the soft duct structure constructed | assembled by the main body zone. Therefore, according to the present invention, a stable structure can be maintained for a long period of time, water leakage can be suppressed and water can be reliably stopped, and it is easy to eliminate the muddy matter accumulated at the bottom of the reservoir. It can be done reliably. Hereinafter, this will be described more specifically.

(a) 上記構成を有する本発明によるときは、柔管路構造物が撓み変形したとしてもその変形が可撓性連結部で吸収されること、剛管路構造物は元々、漏水しにくい前記遮水性ゾーンに配設されていること、剛管路構造物の下面が平坦に形成されているため、該剛管路構造物の下部に密実に土を充填することができること、柔管路構造物が湾曲変形してもその変形の影響が前記剛管路構造物に及ばないことによって、堤体における漏水を効果的に抑制できることになる。 (a) According to the present invention having the above configuration, even if the flexible duct structure is bent and deformed, the deformation is absorbed by the flexible connecting portion, and the rigid duct structure is originally difficult to leak water. Since it is disposed in the water-impervious zone, and the lower surface of the rigid pipe structure is formed flat, the lower part of the rigid duct structure can be filled with soil densely, and the soft duct structure Even if the object is curved and deformed, the influence of the deformation does not reach the rigid pipe structure, so that water leakage in the bank can be effectively suppressed.

(b) 前記のように、剛管路構造物は、全体が剛構造であって撓み変形せず、又、該剛管路構造物は沈下しにくい遮水性ゾーンで構築されていて沈下しにくい。しかも、前記柔管路構造物の湾曲変形によって、その前端が沈下したり傾いたりする等の変形を生じても、この変形は前記可撓性連結部で吸収され、該剛管路構造物の構造的な安定性が長期間に亘って維持される。 (b) As described above, the rigid pipe structure has a rigid structure as a whole and does not bend and deform. Also, the rigid pipe structure is constructed in a water-impervious zone that is unlikely to sink and is difficult to sink. . In addition, even if a deformation such as the front end sinks or tilts due to the curved deformation of the soft duct structure, the deformation is absorbed by the flexible connecting portion, and the rigid duct structure Structural stability is maintained over a long period of time.

かかることから、前記遮水性ゾーンと前記本体ゾーンとの境界部分で剪断力が作用して底樋破損を招いて漏水を生じさせたり、該鋼管路構造物に接続される取水構造物に対する取水用の樋体の連結部の破損を招いて取水不良を生じさせたりすることがない。又、該剛管路構造物が垂直面内で回転方向に変形することがないため、これが接続される取水構造物の排泥用開口部を開閉する扉体の上下動作が阻害されることなく、排泥用開口部の開閉操作を長期間に亘って円滑に行うことができる。これによって、溜池の維持管理のために、溜池の底部に堆積した泥状物の排除を長期間に亘って容易且つ確実に行い得ることとなる。   For this reason, a shearing force acts on the boundary between the water-impervious zone and the main body zone to cause a bottom breach, causing water leakage, or for water intake to a water intake structure connected to the steel pipe structure This will not cause damage to the connecting part of the housing and cause poor water intake. In addition, since the rigid pipe structure is not deformed in the rotational direction within the vertical plane, the vertical movement of the door body for opening and closing the mud opening of the intake structure to which the rigid pipe structure is connected is not hindered. The opening / closing operation of the mud opening can be smoothly performed over a long period of time. This makes it possible to easily and reliably remove the mud accumulated in the bottom of the reservoir for a long period of time for the maintenance of the reservoir.

(2) 本発明に係る剛管路構造物を、プレキャストコンクリート製であり且つ軸線方向に水路が設けられた暗渠ブロックの複数個を水密に接合一体化して構築すると共に、該暗渠ブロックの下面をプレキャストコンクリート製の支持板で支持させ、隣り合う支持板間にベントナイト又は、ベントナイトが混合された混合充填材を充填させるときは、該充填されたベントナイトが水分を吸収して膨張することにより該膨張したベントナイトの上面を剛管路構造物の下面に密着状態となし得る。これにより、該下面と該上面との間で水が流れるのを阻止でき、該剛管路構造物の下面側における間隙（水みち）の発生を抑制でき、該剛管路構造物の下面側における遮水効果を向上させ得ることとなる。 (2) The rigid pipe structure according to the present invention is constructed by watertightly joining and integrating a plurality of culvert blocks made of precast concrete and provided with water channels in the axial direction, and the bottom surface of the culvert block is When supported by a precast concrete support plate and filled with bentonite or a mixed filler mixed with bentonite between adjacent support plates, the expanded bentonite absorbs moisture and expands. The bentonite upper surface can be in close contact with the lower surface of the rigid pipe structure. As a result, it is possible to prevent water from flowing between the lower surface and the upper surface, to suppress the generation of a gap (water channel) on the lower surface side of the rigid pipe structure, and to the lower surface side of the rigid pipe structure. The water shielding effect in the can be improved.

(3) 前記剛管路構造物に付設する遮水壁部を、前後に分割された前壁部材と後壁部材とにより構成し、該前壁部材と後壁部材との間で、暗渠ブロックの接合部に介在された止水シートを挾持する如くなし、該止水シートには、該剛管路構造物の水路に連通する連通孔を設けたものとし、該連通孔の周辺部分を暗渠ブロック間で挾持された状態にすると共に該前壁部材と該後壁部材とを連結一体化する構成を採用するときは、前記止水壁部を、プレキャストコンクリート製の部材を用いて能率良く確実に構築し得る利点がある。 (3) A water-impervious wall portion attached to the rigid pipe structure is constituted by a front wall member and a rear wall member divided into front and rear, and a culvert block between the front wall member and the rear wall member The water stop sheet interposed between the joints is provided so that the water stop sheet is provided with a communication hole communicating with the water channel of the rigid pipe structure, and the peripheral portion of the communication hole is darkened. When adopting a configuration in which the front wall member and the rear wall member are connected and integrated while being held between the blocks, the water blocking wall portion can be efficiently and reliably secured using a precast concrete member. There are advantages that can be built into.

図１において本発明に係る複合型底樋１は、溜池２の堤体３の下端部分５に、該下端部分５を水平に横切るように配設されており、溜池２の貯留水６を排出させるものである。そして該堤体３は、全体が土構造物であって断面外形が台形状を呈しており、透水性の低い遮水性ゾーン７と、その外側部分をなす本体ゾーン９とから構成されている。該遮水性ゾーン７は、溜池２側（内側部分）をなし、溜池の貯留水６が漏水するのを防止するゾーンであり、砂利と粘土の混合物からなる盛土材を盛土して構築されている。又、前記本体ゾーン９は、前記遮水性ゾーン７の外側部分をなすものであり、現地で産出される土を盛土して構築されている。   In FIG. 1, a composite bottom gutter 1 according to the present invention is disposed at a lower end portion 5 of a dam body 3 of a basin 2 so as to horizontally traverse the lower end portion 5, and discharges water 6 stored in the basin 2. It is something to be made. The dam body 3 is a soil structure as a whole and has a trapezoidal cross-sectional outer shape, and is composed of a water-impervious zone 7 having a low water permeability and a main body zone 9 forming an outer portion thereof. The water-impervious zone 7 is a zone that forms the basin 2 side (inner part) and prevents the water 6 stored in the basin from leaking, and is constructed by embanking a banking material made of a mixture of gravel and clay. . The main body zone 9 forms an outer portion of the water-impervious zone 7 and is constructed by embanking soil produced locally.

該複合型底樋１の基本的な構成を図１に基づいて説明すれば、前記遮水性ゾーン７で構築された剛構造の剛管路構造物１０に、可撓性連結部１１を介して、前記本体ゾーン９で構築された柔構造の柔管路構造物１２を連結してなるものである。   The basic structure of the composite bottom rod 1 will be described with reference to FIG. 1. A rigid pipe structure 10 constructed by the water-impervious zone 7 is connected to a rigid pipe structure 10 via a flexible connecting portion 11. The flexible pipe structure 12 constructed by the main body zone 9 is connected.

該剛管路構造物１０は、図２〜３に示すように、下面１３が平坦であり、本実施例においては水平面に形成されており、且つ軸線方向に水路１５（図３）が設けられたコンクリート製の暗渠であり、その長さ方向の中間部位１６に遮水壁部１７が設けられている。該遮水壁部１７は、該中間部位１６を周方向に取り囲み且つ該中間部位１６の外面１９で突設されたコンクリート製の遮水鍔部２０を有している。そして該剛管路構造物１０の前記溜池２側の前端部２１は取水構造物２２に連結されている。該取水構造物２２には、前記溜池２で開放され且つ扉体２３により開閉可能となされた排泥用開口部２５（図３）が設けられている。又、該取水構造物２２の上部分（頂部）２６には、図２に示すように、前記貯留水を取水するための樋体２７の下端樋部（本実施例においては、堤体の内側傾斜面に沿って傾斜状態で配設された取水用の斜樋２９の下端部分）３０が連結されている。   As shown in FIGS. 2 to 3, the rigid pipe structure 10 has a flat bottom surface 13, is formed in a horizontal plane in this embodiment, and is provided with a water channel 15 (FIG. 3) in the axial direction. A concrete culvert, and a water shielding wall 17 is provided at an intermediate portion 16 in the length direction. The impermeable wall portion 17 includes a concrete impermeable wall portion 20 that surrounds the intermediate portion 16 in the circumferential direction and projects from an outer surface 19 of the intermediate portion 16. The front end portion 21 of the rigid pipe structure 10 on the reservoir 2 side is connected to a water intake structure 22. The intake structure 22 is provided with a mud opening 25 (FIG. 3) that is opened at the reservoir 2 and can be opened and closed by a door body 23. Further, as shown in FIG. 2, the upper portion (top portion) 26 of the water intake structure 22 has a lower end flange portion (in this embodiment, the inside of the dam body) for taking in the stored water. A lower end portion 30 of a water intake slope 29 arranged in an inclined state along the inclined surface is connected.

一方、前記柔管路構造物１２は、図１、図４に示すように、樹脂管３１，３１相互を可撓性継手部３２を介して順次接続することにより構成されており、軸線方向に水路３３が設けられている。そして、該柔管路構造物１２の内端部（前端部）４０は前記可撓性連結部１１を介して前記剛管路構造物１０に連結されると共に、その外端（後端）は、図１、図５に示すように、堤体外に前記貯留水６を排出するための排出口４１とされている。   On the other hand, as shown in FIGS. 1 and 4, the flexible pipe structure 12 is configured by sequentially connecting the resin pipes 31 and 31 through a flexible joint portion 32, and is arranged in the axial direction. A water channel 33 is provided. The inner end portion (front end portion) 40 of the soft duct structure 12 is connected to the rigid duct structure 10 via the flexible connecting portion 11, and the outer end (rear end) thereof is As shown in FIGS. 1 and 5, a discharge port 41 is provided for discharging the stored water 6 out of the bank body.

以下、これをより具体的に説明する。
前記取水構造物２２は図２〜３、図６〜７に示すように、ボックス状に構成されており、施工箇所の基礎面（本実施例においては、後述する支持板８２の上面８３）４２上で、軸線方向を前記複合型底樋１の延長方向に合わせてプレキャストコンクリート製の箱型取水部材４３を配設すると共に、その前後の開放端４５，４６をプレキャストコンクリート製の前の端面板４７とプレキャストコンクリート製の後の端面板４９で、ブチルゴム等の弾性止水材５０を介して閉塞してなる。該箱型取水部材４３と該前後の端面板４７，４９とを一体化するには、例えば図６〜７に示すように、該箱型取水部材４３の四隅部において、ＰＣ鋼材からなる連結棒５１を挿通させ、該連結棒５１を緊張して行うことができる。 Hereinafter, this will be described more specifically.
The water intake structure 22 is configured in a box shape as shown in FIGS. 2 to 3 and FIGS. 6 to 7, and the foundation surface of the construction site (in this embodiment, the upper surface 83 of the support plate 82 described later) 42. Above, the box-type water intake member 43 made of precast concrete is disposed with the axial direction aligned with the extending direction of the composite bottom rod 1, and the open ends 45 and 46 before and after the front end plate are made of precast concrete. 47 and a rear end plate 49 made of precast concrete, and are closed through an elastic water stop material 50 such as butyl rubber. In order to integrate the box-type water intake member 43 and the front and rear end face plates 47, 49, for example, as shown in FIGS. 6 to 7, connecting rods made of PC steel at the four corners of the box-type water intake member 43. 51 can be inserted and the connecting rod 51 can be tensioned.

該箱型取水部材４３は、図８に示すように、角筒状を呈しており、前記連結棒５１を挿通させるための挿通孔５２が四隅部に貫設されている。そしてその頂板５３には、その側方に稍変位した状態で円形状の流入開口５５が貫設されている。   As shown in FIG. 8, the box-type water intake member 43 has a rectangular tube shape, and insertion holes 52 through which the connecting rods 51 are inserted are provided at the four corners. The top plate 53 is provided with a circular inflow opening 55 penetrating to the side of the top plate 53.

又、前記前の端面板４７は図８に示すように、上下に稍長い矩形板状を呈し、その上端５６には、前方（溜池側）に向けて突出する張出支持板５７が突設されている。そして、下側の中央部分には前記排泥用開口部２５が設けられており、該排泥用開口部２５の四隅部には、前記箱型取水部材４３の四隅部に設けた前記挿通孔５２に連通せしめられ且つ前記連結棒５１を挿通させるための挿通孔５９，５９，５９，５９が設けられている。該挿通孔５９の前側部分は、拡大した連結用凹部６０とされている。   Further, as shown in FIG. 8, the front end face plate 47 has a rectangular plate shape that is long in the vertical direction, and an overhanging support plate 57 that protrudes forward (toward the basin) protrudes from the upper end 56 thereof. Has been. And the said mud opening 25 is provided in the lower center part, The said insertion hole provided in the four corners of the said box-type water intake member 43 in the four corners of this mud opening 25 Insertion holes 59, 59, 59, 59 for allowing the connection rod 51 to pass therethrough are provided. The front portion of the insertion hole 59 is an enlarged connecting recess 60.

そして、かかる構成を有する前の端面板４５が前記箱型取水部材４３の前の開放端４５を弾性止水材５０（図７）を介して閉塞した状態で、その上側部分６２が、該箱型取水部材４３の上面６１の上方に突出状態となる。又、該前の端面板４７の中央部の上側部位には水抜き孔６３（図６）が設けられており、該水抜き孔６３は、該前の端面板４７が前記取水構造物２２を構築した状態で、該前の端面板４７の後側に溜まった水を前側に排水させる。   The front end plate 45 having such a configuration closes the open end 45 in front of the box-type water intake member 43 through the elastic water stop material 50 (FIG. 7), and the upper portion 62 thereof is the box. The mold water intake member 43 protrudes above the upper surface 61. Further, a drain hole 63 (FIG. 6) is provided in an upper portion of the center portion of the front end face plate 47, and the front end face plate 47 connects the water intake structure 22 to the drain hole 63. In the constructed state, the water accumulated on the rear side of the front end face plate 47 is drained to the front side.

前記後の端面板４９は、図８に示すように矩形板状を呈し、その四隅部には、前記箱型取水部材４３の四隅部に設けた前記挿通孔５２に連通せしめられ且つ前記連結棒５１を挿通させるための外挿通孔６５が設けられると共に、該外挿通孔６５の後側部分は、拡大した連結用凹部６６とされている。又、該後の端面板４９の中央部分には、図８、図３に示すように、前記剛管路構造物１０の水路１５に連通する円形状の流出口６７が設けられており、その四隅部には、前記剛管路構造物１０の前記前端部２１を連結するための、ＰＣ鋼材からなる連結軸６９（図１５）を挿通させる内挿通孔７０が貫設されている。該内挿通孔６５の前側部分は、拡大した連結用凹部６８とされている。   The rear end face plate 49 has a rectangular plate shape as shown in FIG. 8, and its four corners communicate with the insertion holes 52 provided at the four corners of the box-type water intake member 43 and the connecting rod. An outer insertion hole 65 for inserting 51 is provided, and a rear portion of the outer insertion hole 65 is an enlarged connecting recess 66. Further, as shown in FIGS. 8 and 3, a circular outlet 67 communicating with the water channel 15 of the rigid pipe structure 10 is provided in the central portion of the rear end face plate 49. In the four corners, internal insertion holes 70 through which a connecting shaft 69 (FIG. 15) made of PC steel for connecting the front end portion 21 of the rigid pipe structure 10 is inserted. The front portion of the insertion hole 65 is an enlarged connecting recess 68.

然して、前記箱型取水部材４３の前後の開放端４７，４９を、周方向に連続する弾性止水材５０，５０（図７）を介して前の端面板４７と後の端面板４９で閉塞し、この状態で、図７に示すように、四隅部の夫々において連通状態にある前記挿通孔５９，前記挿通孔５２，前記外挿通孔６５に前記連結棒５１を挿通すると共に、前記両端の連結用凹部６０，６６において、該連結棒５１の両端部分をなす雄ネジ部７１，７１に、座金７２を介してナット７３を螺合し締め付けることにより全体を一体化でき、これにより、図２〜３、図６に示すようなボックス状の前記取水構造物２２を構成できる。なお該連結用凹部６０，６６は、ナット７３を締め付けた後にモルタル７５（図７（Ａ）を充填する。   However, the front and rear open ends 47 and 49 of the box-type water intake member 43 are closed by the front end face plate 47 and the rear end face plate 49 via elastic water blocking materials 50 and 50 (FIG. 7) continuous in the circumferential direction. In this state, as shown in FIG. 7, the connecting rod 51 is inserted into the insertion hole 59, the insertion hole 52, and the outer insertion hole 65 which are in communication with each other at the four corners, and In the connecting recesses 60 and 66, the whole can be integrated by screwing and tightening the nut 73 to the male screw portions 71 and 71 forming the both ends of the connecting rod 51 via the washer 72, whereby FIG. -3, the box-shaped intake structure 22 as shown in FIG. 6 can be configured. The connecting recesses 60 and 66 are filled with the mortar 75 (FIG. 7A) after the nut 73 is tightened.

該取水構造物の前記排泥用開口部２５の下面７８は、本実施例においては、図３、図１に示すように、その前方に延長する水平な洗掘防止のためのコンクリート製の水平保護面７６に略面一に連なり、この水平保護面７６は、溜池２の底面７７に面一状態に連なっている。   In the present embodiment, the lower surface 78 of the mud opening 25 of the water intake structure is made of concrete, as shown in FIGS. 3 and 1, for preventing horizontal scouring extending forward. The horizontal protective surface 76 is substantially flush with the protective surface 76, and the horizontal protective surface 76 is flush with the bottom surface 77 of the reservoir 2.

又本実施例において該取水構造物２２は、図６に示すように、その下面７９の左右部分８０，８０が、施工箇所の設置面８１に敷設されたコンクリート製の支持板（例えば１００ｍｍ程度の厚さを有する）８２，８２の上面（前記基礎面４２）８３，８３に設置され、該支持板８２，８２間にベントナイト８５が密に充填されている。このように充填されたベントナイト８５は、水分吸収に伴って膨張するため、前記取水構造物２２の下面７９に、膨張したベントナイト８５の上面８７が密着状態となり、これにより、該下面８６と該上面８７との間で水が流れるのが阻止され、前記取水構造物２２の下面側における止水効果が向上されている。   In this embodiment, as shown in FIG. 6, the intake structure 22 has a concrete support plate (for example, about 100 mm) whose left and right portions 80, 80 of the lower surface 79 are laid on the installation surface 81 of the construction site. The bentonite 85 is densely packed between the support plates 82 and 82. Since the bentonite 85 filled in this manner expands as moisture is absorbed, the upper surface 87 of the expanded bentonite 85 comes into close contact with the lower surface 79 of the water intake structure 22, whereby the lower surface 86 and the upper surface are in contact with each other. Water is prevented from flowing between the water intake 87 and the water stop effect on the lower surface side of the water intake structure 22 is improved.

又、前記前の端面板４７に設けられている前記排泥用開口部２５の両側部位には、図９〜１０に示すように、上下方向に延長するガイド部８９、８９が設けられており、前記扉体２３は、その両側部分９１，９１が該左右のガイド部８９、８９でガイドされて昇降可能となされている。そして該扉体２３は、図２、図９（Ａ）、図１０（Ａ）に示すように、最下降状態で該排泥用開口部２５を閉じる一方、図９（Ｂ）、図１０（Ｂ）に示すように、最上昇状態で該排泥用開口部２５を開放するようになされている。   Further, as shown in FIGS. 9 to 10, guide portions 89 and 89 extending in the vertical direction are provided on both sides of the mud opening 25 provided in the front end plate 47. The door body 23 can be moved up and down with both side portions 91 and 91 being guided by the left and right guide portions 89 and 89. As shown in FIGS. 2, 9 (A), and 10 (A), the door body 23 closes the mud opening 25 in the lowest position, while FIGS. 9 (B) and 10 ( As shown in B), the mud opening 25 is opened in the most elevated state.

該扉体２３の昇降操作は、図９〜１０に示すような昇降装置９２を用いて行われる。該昇降装置９２は、前記張出支持板５７の上面に設置された支持台９３のラック駆動装置に設けられたハンドル９５を正逆回転操作することによって上下動するラック棒９６の下端に、前記扉体２３がピンで連結されており、該ラック棒９６の上下動によって該扉体２３が前記のように昇降できる。そして、図示しない階段を降りて前記昇降装置９２のハンドル９５を回転操作して前記扉体２３を昇降操作する。   The raising / lowering operation of this door body 23 is performed using the raising / lowering apparatus 92 as shown to FIGS. The elevating device 92 is attached to the lower end of the rack rod 96 that moves up and down by rotating the handle 95 provided in the rack driving device of the support base 93 installed on the upper surface of the overhanging support plate 57 in the forward and reverse directions. The door body 23 is connected by a pin, and the door body 23 can be moved up and down as described above by the vertical movement of the rack bar 96. Then, the stairs (not shown) are moved down and the handle 95 of the lifting device 92 is rotated to move the door body 23 up and down.

又、前記箱型取水部材４３の前記頂板５３に設けられている前記流入開口５５には、図１１、図２に示すように、前記取水用の樋体２７の下端樋部３０が連結されている。該下端樋部３０は、垂直筒体１０３の上端に、前記溜池２の内側部分の法面１０５に向けて突出する傾斜筒体１０６が屈曲形成されてなり、該垂直筒体１０３の下端部分１０７が前記流入開口５５に挿入されてモルタル１０９で固定されている。そして、該傾斜筒体１０６の上端が開放されて、前記溜池２の貯留水６を取水するための下端の取水口１１０が形成されている。又、該傾斜筒体１０６の側面部には、図１１〜１２に示すように、前記溜池２の内側部分において傾斜状態（前記法面１０５に沿って傾斜しており、且つ、該法面１０５に直交する矢視Ｆ方向で見て傾斜した状態）で配設された斜樋１１２の下端１１３が連結されている。本実施例においては、該斜樋１１２と前記下端樋部３０、傾斜筒体１０６とで前記取水用の樋体２７が構成されている。   The inflow opening 55 provided in the top plate 53 of the box-type water intake member 43 is connected to the lower end flange 30 of the water intake housing 27 as shown in FIGS. Yes. The lower end flange 30 is formed by bending an inclined cylindrical body 106 protruding toward the slope 105 of the inner portion of the reservoir 2 at the upper end of the vertical cylindrical body 103, and the lower end portion 107 of the vertical cylindrical body 103. Is inserted into the inflow opening 55 and fixed with a mortar 109. And the upper end of this inclination cylinder body 106 is open | released, and the water intake port 110 of the lower end for taking in the stored water 6 of the said reservoir 2 is formed. Further, as shown in FIGS. 11 to 12, the side surface portion of the inclined cylindrical body 106 is inclined in the inner portion of the reservoir 2 (inclined along the slope 105 and the slope 105. The lower end 113 of the slope 112 arranged in a state of being inclined when viewed in the direction of the arrow F perpendicular to the direction F is connected. In the present embodiment, the inclined rod 112, the lower end flange portion 30, and the inclined cylindrical body 106 constitute the intake water casing 27.

そして、該斜樋１１２の上端と長さ方向の中間部位には、前記溜池２の貯留水６を取水するための上端の取水口１１５と中間の取水口１１６が設けられている。これらの取水口１１０，１１６，１１５は、共に、前記法面１０５の傾斜方向で上下スライドし得る開閉板１１７で開閉可能とされており、該開閉板１１７は、該法面１０５に沿って配設された操作ロッド１１９の下端１２０に連結されている。該操作ロッド１１９は、その軸線方向で適宜、軸受１２１で支持され、その上端部分は、前記堤体３の頂上部分に配設された軸受台１２５で軸支されてなり、該操作ロッド１１９の上端に取り付けられたハンドル１２２を正逆回転操作することによって前記開閉板１１７を上下スライド可能となされている。   Further, an upper water intake 115 and an intermediate water intake 116 for taking in the stored water 6 of the reservoir 2 are provided at an intermediate portion in the length direction with respect to the upper end of the slope 112. These water intakes 110, 116, and 115 can be opened and closed by an opening / closing plate 117 that can slide up and down in the inclination direction of the slope 105, and the opening / closing plate 117 is arranged along the slope 105. It is connected to the lower end 120 of the provided operating rod 119. The operation rod 119 is appropriately supported by a bearing 121 in the axial direction thereof, and an upper end portion of the operation rod 119 is pivotally supported by a bearing stand 125 disposed on the top portion of the dam body 3. The opening / closing plate 117 can be slid up and down by rotating the handle 122 attached to the upper end forward and backward.

然して、溜池２の水深に応じて所要高さの取水口を開くことにより該斜樋１１２内に貯留水６を流入させることができ、これを、前記下端樋部３０を介して前記取水構造物２２内に流入させることにより、該貯留水を、前記剛管路構造物１０と前記柔管路構造物１２を通して流すことができ、該柔管路構造物１２の外端の排出口４１で堤体外に排出させ得る。   However, it is possible to allow the stored water 6 to flow into the slope 112 by opening a water intake having a required height in accordance with the water depth of the reservoir 2, and this can be supplied to the intake structure via the lower end flange 30. 22, the stored water can flow through the rigid pipe structure 10 and the soft pipe structure 12, and the embankment is formed at the discharge port 41 at the outer end of the soft pipe structure 12. Can be discharged outside the body.

前記剛管路構造物１０は、本実施例においては図２〜３、図１３〜１４に示すように、プレキャストコンクリート製であり且つ軸線方向に水路１５が設けられた暗渠ブロック１２３の複数個を水密に接合一体化して構築されている。該暗渠ブロック１２３としては、長さの長い第１の暗渠ブロック１２３ａと、長さの短い第２の暗渠ブロック１２３ｂの２種類を用いる。   As shown in FIGS. 2 to 3 and FIGS. 13 to 14, the rigid pipe structure 10 is made of precast concrete and includes a plurality of underdrain blocks 123 provided with water channels 15 in the axial direction. It is constructed by watertight joining. As the culvert block 123, two types of a first culvert block 123a having a long length and a second culvert block 123b having a short length are used.

該第１の暗渠ブロック１２３ａは図８に示すように、下面１２５と上面１２６が水平面に形成されると共に左右の外側面１２７，１２７が傾斜面に形成された、横断面外形が台形状を呈し、且つ、軸線方向に円形の水路（内径は、例えば６００ｍｍ）１５が設けられており、全長は例えば１５００ｍｍに設定されている。又、左右の側面部１２７，１２７の上下には夫々、ＰＣ鋼材からなる連結軸６９（図１４〜１５）を挿通させるための挿通孔１３０が、該第１の暗渠ブロック１２３ａの左右の側面部１２７，１２７の上下位置で貫設されている。そして、該第１の暗渠ブロック１２３ａの左右の側面部１２７，１２７には、図８、図１５に示すように、各挿通孔１３０をその長さ方向の中央部分で途切れ状態とするように、前記外側面１２７，１２７を凹ませて連結用凹部１３１が設けられている。又、該第１の暗渠ブロック１２３ａの前端面１３２には、図８、図１６（Ｃ）に示すように、前記水路１５の前端１３３を取り囲むようにシール材嵌着溝１３５が設けられ、該シール材嵌着溝１３５に環状の弾性シール材１３６を嵌め入れて接着されており、該弾性シール材１３５が該前端面１３２から突出状態とされている。   As shown in FIG. 8, the first underdrain block 123a has a lower surface 125 and an upper surface 126 formed in a horizontal plane and left and right outer surfaces 127 and 127 formed in inclined surfaces, and has a trapezoidal cross section. In addition, a circular water channel (inner diameter is, for example, 600 mm) 15 is provided in the axial direction, and the total length is set to, for example, 1500 mm. In addition, on the upper and lower sides of the left and right side portions 127, 127, insertion holes 130 for inserting a connecting shaft 69 (FIGS. 14 to 15) made of PC steel are respectively provided on the left and right side portions of the first underdrain block 123a. 127 and 127 are vertically provided at the upper and lower positions. And in the left and right side surface portions 127, 127 of the first underdrain block 123a, as shown in FIG. 8 and FIG. 15, each insertion hole 130 is cut off at the central portion in the length direction. A connecting recess 131 is provided by recessing the outer surfaces 127 and 127. Further, as shown in FIGS. 8 and 16C, a seal material fitting groove 135 is provided on the front end surface 132 of the first underdrain block 123a so as to surround the front end 133 of the water channel 15, An annular elastic sealing material 136 is fitted into the sealing material fitting groove 135 and bonded, and the elastic sealing material 135 protrudes from the front end surface 132.

又、前記第２の暗渠ブロック１２３ｂは、図８、図１３〜１４に示すように、前記第１の暗渠ブロック１２３ａと同様の構成を有してはいるが長さは短く形成された（例えば１０００ｍｍに形成されている）ブロック本体１３７の円形の水路１５の後端１５４に、可撓性樹脂管１３９を用いてなる前記可撓性連結部１１が突設されている。   Further, as shown in FIGS. 8 and 13 to 14, the second underdrain block 123b has the same configuration as the first underdrain block 123a, but is formed with a short length (for example, At the rear end 154 of the circular water channel 15 of the block main body 137 (formed to 1000 mm), the flexible connecting portion 11 using the flexible resin tube 139 is projected.

該可撓性樹脂管１３９は本実施例においては図１３、図１７〜１８、図２４に示すように、全長が例えば８００ｍｍの長さを有し、例えばポリエチレン製の円筒管１４１の外周面に螺旋状のリブ１４２が巻回されてなる、軸線方向に通水用円形孔１４３が設けられたリブ付き耐圧円筒管であり、その後端側の部分１３９ａは、後述する樹脂管２２３のソケット部２３７に嵌め入れられる。そして、該後端側の部分１３９ａの外周面１４６に周設された嵌着溝１４７に、リング状を呈するブチルゴム等のゴム製シール部材１４９の基端部１５０が嵌着されており、その先端部１５１が該外周面１４６から突出している。かかる構成を有する可撓性樹脂管１３９は、その前側部分１５２が、その通水用円形孔１４３の内面１５３を前記水路１５の内面１５５と合致させた状態で前記ブロック本体１３７に埋設されている。これにより、前記可撓性樹脂管１３９の後側部分が前記ブロック本体１３７の後端１５４に、例えば５００ｍｍ程度突出状態となって前記可撓性連結部１１が形成されている。   In this embodiment, the flexible resin tube 139 has a total length of, for example, 800 mm as shown in FIGS. 13, 17 to 18, and 24. For example, the flexible resin tube 139 is formed on the outer peripheral surface of a cylindrical tube 141 made of polyethylene. It is a pressure-resistant cylindrical tube with a rib provided with a circular hole for water passage 143 in the axial direction, in which a spiral rib 142 is wound, and a rear end portion 139a thereof is a socket portion 237 of a resin tube 223 described later. It is inserted in. Then, a base end portion 150 of a rubber seal member 149 such as a butyl rubber having a ring shape is fitted into a fitting groove 147 provided around the outer peripheral surface 146 of the rear end side portion 139a. A portion 151 protrudes from the outer peripheral surface 146. The flexible resin tube 139 having such a configuration has its front portion 152 embedded in the block main body 137 with the inner surface 153 of the water passage circular hole 143 aligned with the inner surface 155 of the water channel 15. . As a result, the rear portion of the flexible resin tube 139 protrudes from the rear end 154 of the block main body 137 by, for example, about 500 mm, and the flexible connecting portion 11 is formed.

然して、該第１の暗渠ブロック１２３ａと該第２の暗渠ブロック１２３ｂとを用いて剛管路構造物１０を構築するに際しては、先ず図１３〜１５に示すように、１番目の第１の暗渠ブロック１２３ａ１の前端面１３２を、その水路１５の前端１３３を前記取水構造物２２の前記流出口６７に連通させると共に前記挿通孔１３０を前記内挿通孔７０に連通させて、前記後の端面板４９の後面１５６に当接させる。この状態で、該第１の暗渠ブロック１２３ａ１の四隅部の夫々において連通状態にある前記挿通孔１３０と前記内挿通孔７０に前記連結軸６９を挿通すると共に、図１５、図１６（Ａ）（Ｂ）に示すように、該連結軸６９の両端部分をなす雄ネジ部１５７，１５７を前記連結用凹部６８，１３１に突出状態とし、該連結用凹部６８，１３１において、該雄ネジ部１５７，１５７に、座金１５９を介してナット１６０を螺合し締め付け、該第１の暗渠ブロック１２３ａ１を前記弾性シール材１３６を圧縮状態にして前記取水構造物２２に連結する。   However, when the rigid pipe structure 10 is constructed using the first culvert block 123a and the second culvert block 123b, first, as shown in FIGS. The front end surface 132 of the block 123a1 is connected to the front end 133 of the water channel 15 to the outlet 67 of the intake structure 22, and the insertion hole 130 is connected to the inner insertion hole 70, so that the rear end plate 49 The rear surface 156 is brought into contact. In this state, the connecting shaft 69 is inserted into the insertion hole 130 and the inner insertion hole 70 that are in communication with each other at the four corners of the first culvert block 123a1, and FIG. 15 and FIG. B), the male screw portions 157 and 157 forming both end portions of the connecting shaft 69 are projected into the connecting concave portions 68 and 131, and the male screw portions 157 and 157 are connected to the connecting concave portions 68 and 131, respectively. The nut 160 is screwed and tightened to a pin 157 through a washer 159, and the first underdrain block 123a1 is connected to the intake structure 22 with the elastic sealing member 136 in a compressed state.

その後、図１３〜１５に示すように、２番目の第１の暗渠ブロック１２３ａ２の前端面１３２を、その水路１５の前端１３３を前記１番目の第１の暗渠ブロック１２３ａ１の前記水路１５の後端１６１に連通させると共に挿通孔１３０，１３０相互を連通させて、該１番目の第１の暗渠ブロック１２３ａ１の後端面１６２に当接させ、該第１の暗渠ブロック１２３ａ１，１２３ａ２の四隅部の夫々において連通状態にある前記挿通孔１３０，１３０に前記連結軸６９を挿通すると共に、図１５、図６（Ｂ）に示すように、該連結軸６９の両端部分をなす雄ネジ部１５７，１５７を前記連結用凹部１３１，１３１に突出状態とし、前記連結用凹部１３１，１３１において、該雄ネジ部１５７，１５７に、座金１５９を介してナット１６０を螺合し締め付け、該第１の暗渠ブロック１２３ａ１，１２３ａ２相互を、前記弾性シール材１３６を圧縮状態にして連結する。   Thereafter, as shown in FIGS. 13 to 15, the front end surface 132 of the second first culvert block 123 a 2 and the front end 133 of the water channel 15 are connected to the rear end of the water channel 15 of the first first culvert block 123 a 1. 161 and the insertion holes 130 and 130 are communicated with each other to contact the rear end surface 162 of the first first underdrain block 123a1, and at each of the four corners of the first underdrain blocks 123a1 and 123a2. The connecting shaft 69 is inserted through the insertion holes 130 and 130 in the communicating state, and male screw portions 157 and 157 forming both end portions of the connecting shaft 69 are inserted into the connecting shaft 69 as shown in FIGS. 15 and 6B. The coupling recesses 131 and 131 are projected, and the nuts 160 are screwed into the male threaded portions 157 and 157 through the washers 159 in the coupling recesses 131 and 131. Clamping, the underdrain blocks 123a1,123a2 mutual first, connecting with the elastic sealing member 136 in compression.

その後、図１３〜１５に示すように、３番目の第１の暗渠ブロック１２３ａ３を前記２番目の第１の暗渠ブロック１２３ａ２の後端に、連結軸６９を用いて同様に連結すると共に、４番目の第１の暗渠ブロック１２３ａ４を該３番目の第１の暗渠ブロック１２３ａ３の後端に、連結軸６９を用いて同様に連結する。然る後、前記第２の暗渠ブロック１２３ｂを、該４番目の第１の暗渠ブロック１２３ａ４の後端に、連結軸６９を用いて同様に連結する。これにより、可撓性連結部１１が後端に設けられた剛管路構造物１０が構築されることになる。なお、前記各連結用凹部１３１には、ナット１６０を締め付けた後にモルタルを充填する。   Thereafter, as shown in FIGS. 13 to 15, the third first culvert block 123 a 3 is similarly connected to the rear end of the second first culvert block 123 a 2 using the connecting shaft 69 and the fourth The first culvert block 123a4 is similarly connected to the rear end of the third first culvert block 123a3 using the connecting shaft 69. Thereafter, the second culvert block 123b is similarly connected to the rear end of the fourth first culvert block 123a4 using the connecting shaft 69. Thereby, the rigid-pipe structure 10 with which the flexible connection part 11 was provided in the rear end is constructed | assembled. Each connecting recess 131 is filled with mortar after the nut 160 is tightened.

なお本実施例においては図２、図１３に示すように、１番目の第１の暗渠ブロック１２３ａ１の前側部分１６５の下面１６６と、１番目の第１の暗渠ブロック１２３ａ１と２番目の暗渠ブロック１２３ａ２相互の連結部分１６７の下面１６９，１７０と、該２番目の第１の暗渠ブロック１２３ａ２と３番目の暗渠ブロック１２３ａ３相互の連結部分１７１の下面１７２，１７３と、４番目の第１の暗渠ブロック１２３ａ４と前記第２の暗渠ブロック１２３ｂの連結部分１７５の下面１７６，１７７と、該第２の暗渠ブロック１２３ｂの後側部分１７９の下面１８０が、夫々、その全幅に亘って、施工箇所の設置面８１に敷設されたコンクリート製の支持板（例えば１００ｍｍ程度の厚さを有する）１８１の上面１８２に載設され、隣り合う支持板１８１，１８１間にベントナイト１８３が密に充填されている。この密な充填は、例えば、敷設した隣り合う支持板１８１，１８１間にベントナイト１８３を盛り上がる状態に収容して後、該支持板１８１，１８１上に暗渠ブロック１２３を載置することにより、容易に達成できる。   In this embodiment, as shown in FIGS. 2 and 13, the lower surface 166 of the front portion 165 of the first first culvert block 123a1, the first first culvert block 123a1 and the second culvert block 123a2. The lower surfaces 169, 170 of the mutual connecting portion 167, the lower surfaces 172, 173 of the connecting portion 171 of the second first culvert block 123a2 and the third culvert block 123a3, and the fourth first culvert block 123a4. And the lower surface 176, 177 of the connecting portion 175 of the second undercarriage block 123b, and the lower surface 180 of the rear side portion 179 of the second undercarriage block 123b, respectively, the installation surface 81 of the construction site over the entire width thereof. Is placed on the upper surface 182 of a concrete support plate (for example, having a thickness of about 100 mm) 181 laid on the Bentonite 183 are densely packed between the plates 181 and 181. This dense filling can be easily performed by, for example, placing bentonite 183 in a state of rising between adjacent support plates 181 and 181, and then placing a culvert block 123 on the support plates 181 and 181. Can be achieved.

このように充填されたベントナイト１８３は、水分吸収に伴って膨張するため、図１９に示すように、前記剛管路構造物１０の下面１８５に、膨張したベントナイト１８３の上面１８６が密着状態となる。これにより、該下面１８５と該上面１８６との間で水が流れるのが阻止され、前記剛管路構造物１０の下面側における隙間（水みち）の発生が防止され、該剛管路構造物１０の下面側における遮水効果が向上されている。なお本実施例においては図２、図１３に示すように、３番目の暗渠ブロック１２３ａ３と４番目の暗渠ブロック１２３ａ４の連結部分に前記遮水壁部１７が設けられているため、該遮水壁部１７によって、前記支持板１８１，１８１間のベントナイト１８３が分断された状態となっている。   Since the bentonite 183 filled in this manner expands with moisture absorption, as shown in FIG. 19, the upper surface 186 of the expanded bentonite 183 comes into close contact with the lower surface 185 of the rigid pipe structure 10. . Accordingly, water is prevented from flowing between the lower surface 185 and the upper surface 186, and a gap (water channel) on the lower surface side of the rigid pipe structure 10 is prevented, and the rigid pipe structure The water shielding effect on the lower surface side of 10 is improved. In this embodiment, as shown in FIGS. 2 and 13, the water shielding wall 17 is provided at the connecting portion of the third culvert block 123 a 3 and the fourth culvert block 123 a 4. The bentonite 183 between the support plates 181 and 181 is divided by the portion 17.

前記遮水壁部１７は、本実施例においては図３、図１３、図２０に示すように、前記剛管路構造物１０の延長方向で見て前後に分割された前壁部材１８５と後壁部材１８６との間で、前記３番目と４番目の暗渠ブロック１２３ａ３，１２３ａ４の連結部に介在された遮水シート１８７を挾持してなる。該遮水シート１８７は、該暗渠ブロック１２３ａ３，１２３ａ４の各水路１５，１５に連通する円形の連通孔１８９を有しており、該連通孔１８９の周縁部分１９０は、該暗渠ブロック１２３ａ３，１２３ａ４間で挾持された状態にあり且つ、前記前壁部材１８５と後壁部材１８６とが連結一体化されてなるものである。   In this embodiment, as shown in FIGS. 3, 13, and 20, the water-impervious wall portion 17 includes a front wall member 185 and a rear wall member 185 that are divided forward and backward as viewed in the extending direction of the rigid pipe structure 10. Between the wall members 186, a water shielding sheet 187 interposed between the connecting portions of the third and fourth underdrain blocks 123a3 and 123a4 is held. The water shielding sheet 187 has a circular communication hole 189 communicating with the water channels 15 and 15 of the underdrain block 123a3 and 123a4, and a peripheral portion 190 of the communication hole 189 is provided between the underdrain blocks 123a3 and 123a4. The front wall member 185 and the rear wall member 186 are connected and integrated.

前記遮水シート１８７は本実施例においてはゴム製のものであり、前記連通孔１８９の周縁部分１９０が前記暗渠ブロック１２３ａ３，１２３ａ４間で弾性圧縮状態に挾持されることにより、両暗渠ブロックの連結部１９１を止水でき、剛管路構造物１０内を流れる水の漏水を防止する。   The water shielding sheet 187 is made of rubber in this embodiment, and the peripheral portion 190 of the communication hole 189 is held in an elastically compressed state between the culvert blocks 123a3 and 123a4, thereby connecting the culvert blocks. The portion 191 can be stopped, and leakage of water flowing through the rigid pipe structure 10 can be prevented.

前記前壁部材１８５と前記後壁部材１８６は、安定性や耐久性に乏しい前記遮水シート１８７を挾持して該遮水シート１８７による止水効果を持続させると共に、前記剛管路構造物１０の外面１９で突設された遮水鍔部２０を形成し、該剛管路構造物１０に沿った水の流れを遮水するものである。   The front wall member 185 and the rear wall member 186 hold the water shielding sheet 187 having poor stability and durability to maintain the water blocking effect by the water shielding sheet 187, and the rigid pipe structure 10 A water-impervious trough 20 projecting from the outer surface 19 is formed, and the flow of water along the rigid pipe structure 10 is shielded.

該前壁部材１８５は、図２０に示すように、略正方形板状を呈するプレキャストコンクリート製であり、その後面１９２は垂直面に形成されると共に、その前面１９３は、上方に向けて後方に傾斜する傾斜面に形成されている。そして中央部分には、前記３番目の第１の暗渠ブロック１２３ａ３の後端部分１９５を密接に嵌め入れることのできる嵌入孔１９６が設けられている。又前記後壁部材１８６は、略正方形板状を呈するプレキャストコンクリート製であり、その前面１９７は垂直面に形成されると共に、その後面１９９は、上方に向けて後方に傾斜する傾斜面に形成されている。そして中央部分には、前記４番目の第１の暗渠ブロック１２３ａ４の前端部分２００を密接に嵌め入れることのできる嵌入孔２０１が設けられている。   As shown in FIG. 20, the front wall member 185 is made of precast concrete having a substantially square plate shape. The rear surface 192 is formed as a vertical surface, and the front surface 193 is inclined rearward toward the upper side. It is formed on the inclined surface. The center portion is provided with an insertion hole 196 into which the rear end portion 195 of the third first underdrain block 123a3 can be closely fitted. The rear wall member 186 is made of precast concrete having a substantially square plate shape, and its front surface 197 is formed as a vertical surface, and its rear surface 199 is formed as an inclined surface inclined rearward toward the upper side. ing. The center portion is provided with an insertion hole 201 into which the front end portion 200 of the fourth first underdrain block 123a4 can be closely fitted.

本実施例においては前記前壁部材１８５と後壁部材１８６は夫々、図２１に示すように、同様の構成で四分割されており、左右方向に長い矩形板状を呈し、前記暗渠ブロック１２３ａ３，１２３ａ４の下面２０２，２０３の下方に突出する状態で配設される下段ブロック片２０５ａ，２０５ｂと、前記暗渠ブロック１２３ａ３，１２３ａ４の左右に位置して該下段ブロック２０５ａ，２０５ｂ上に載置される左右の中段ブロック片２０６ａ，２０６ａ、２０６ｂ，２０６ｂと、左右方向に長い矩形板状を呈しており、前記暗渠ブロック１２３ａ３，１２３ａ４の上面２０７，２０８の上方に突出する状態で前記左右の中間ブロック片２０６ａ，２０６ａ、２０６ｂ，２０６ｂ上に載置される上段ブロック片２０９ａ，２０９ｂとから構成されている。   In the present embodiment, as shown in FIG. 21, the front wall member 185 and the rear wall member 186 are each divided into four with the same configuration, exhibiting a long rectangular plate shape in the left-right direction, and the culvert block 123a3 The lower block pieces 205a and 205b disposed in a state of projecting downward from the lower surfaces 202 and 203 of the 123a4, and the left and right sides positioned on the left and right of the culvert blocks 123a3 and 123a4 and placed on the lower block 205a and 205b. Middle block pieces 206a, 206a, 206b, 206b and a rectangular plate shape that is long in the left-right direction, and protrudes above the upper surfaces 207, 208 of the culvert blocks 123a3, 123a4, and the left and right intermediate block pieces 206a. , 206a, 206b, 206b and upper block pieces 209a, 209b mounted on the upper block pieces. There.

そして前記前壁部材１８５は、図２０に示すように、前記下段ブロック片２０５ａと中段ブロック片２０６ａとを、中段ブロック２０６ａと上段ブロック２０９ａとを、夫々、ブロックの前面１９３において連結プレート２１１で連結し、全体を一体化して構成されている。又前記後壁部材１８６は、前記下段ブロック片２０５ｂと中段ブロック片２０６ｂとを、中段ブロック２０６ｂと上段ブロック２０９ｂとを、夫々、ブロックの後面１９９において連結プレート２１１で連結し、全体を一体化して構成されている。   As shown in FIG. 20, the front wall member 185 connects the lower block piece 205a and the middle block piece 206a, and the middle block 206a and the upper block 209a with the connection plate 211 on the front surface 193 of the block, respectively. However, the whole is integrated. Further, the rear wall member 186 connects the lower block piece 205b and the middle block piece 206b, the middle block 206b and the upper block 209b, respectively, on the rear surface 199 of the block by the connecting plate 211, and the whole is integrated. It is configured.

そして、このように構成された前壁部材１８５と後壁部材１８６とは、図２２に示すように、その左右の側面２１３，２１５の内端側に向き合う状態で凹設された凹所２１８，２１８の内端に形成されて前後に重ね合わせられてなる連結片部２１６，２１７相互をボルト２１９で連結することにより一体化されている。   Then, the front wall member 185 and the rear wall member 186 configured as described above are, as shown in FIG. 22, the recesses 218 that are recessed so as to face the inner end sides of the left and right side surfaces 213 and 215, The connecting pieces 216 and 217 formed at the inner end of 218 and overlapped in the front-rear direction are connected together by bolts 219.

図２３は、かかる構成を有する遮水壁部１７を前記下段ブロック片２０５ａ，２０５ｂ、中段ブロック片２０６ａ，２０６ａ、２０６ｂ，２０６ｂ、上端ブロック片２０９ａ，２０９ａとを用いて前記遮水壁部１７を構築する施工工程の一例を示すものである。先ず図２３（Ａ）に示すように、施工箇所の設置面８１に敷設されたコンクリート製の基礎板２２０上に、前記前後の下段ブロック片２０５ａ，２０５ｂを前記遮水シート１８７を挾持するように載置し、該前後の下段ブロック片２０５ａ，２０５ｂを、前記のようにボルト２１９で連結することによって一体化し、該遮水シート１８７を圧縮状態とする。   FIG. 23 shows the water-impervious wall portion 17 having the above-described structure by using the lower block pieces 205a and 205b, the middle block pieces 206a, 206a, 206b and 206b, and the upper block pieces 209a and 209a. An example of the construction process to build is shown. First, as shown in FIG. 23A, the front and rear lower block pieces 205a and 205b are held on the concrete base plate 220 laid on the installation surface 81 of the construction site so that the water shielding sheet 187 is held. The front and back lower block pieces 205a and 205b are integrated by connecting with the bolts 219 as described above, and the water shielding sheet 187 is brought into a compressed state.

その後、図２３（Ｂ）に示すように、該下段ブロック片２０５ａ，２０５ｂの左右方向の中央部分において、前記３番目の第１の暗渠ブロック１２３ａ３の後端部分１９５を載置すると共に、前記４番目の第１の暗渠ブロック１２３ａ４の前端部分２００を載置する。このとき、両ブロックの各水路１５，１５を前記連結孔１８９に連通させる。その後、該後端部分１９５の左右に、前記中段のブロック片２０６ａ，２０６ａ、２０６ｂ，２０６ｂを、前記遮水シート１８７を挾持するように、該後端部分１９５に当接させて載置する。その後、該中段ブロック片２０６ａ，２０６ａを前記後端部分１９５に固定すると共に、該中段ブロック片２０６ｂ，２０６ｂを前記前端部分２００に固定する。   Thereafter, as shown in FIG. 23 (B), the rear end portion 195 of the third first culvert block 123a3 is placed at the central portion in the left-right direction of the lower block pieces 205a, 205b, and the 4th The front end portion 200 of the first first culvert block 123a4 is placed. At this time, the water channels 15 and 15 of both blocks are communicated with the connection hole 189. Thereafter, the middle block pieces 206 a, 206 a, 206 b, and 206 b are placed on the left and right sides of the rear end portion 195 in contact with the rear end portion 195 so as to hold the water shielding sheet 187. Thereafter, the middle block pieces 206a and 206a are fixed to the rear end portion 195, and the middle block pieces 206b and 206b are fixed to the front end portion 200.

又、前後の中段ブロック片２０６ａ、２０６ｂを、前記のようにボルト２１９で連結することによって一体化し、該遮水シート１８７を圧縮状態とする。この状態で、中段ブロック片２０６ａ，２０６ａの上面、中段ブロック片２０６ｂ，２０６ｂの上面、前記３番目の第１暗渠ブロック１２３ａ３の上面、前記４番目の第１暗渠ブロック１２３ａ４の上面は、同一の水平面２０８に存する。   Further, the front and rear middle block pieces 206a and 206b are integrated by connecting them with the bolts 219 as described above, and the water shielding sheet 187 is brought into a compressed state. In this state, the upper surface of the middle block pieces 206a and 206a, the upper surface of the middle block pieces 206b and 206b, the upper surface of the third first culvert block 123a3, and the upper surface of the fourth first culvert block 123a4 are on the same horizontal plane. 208.

その後、図２３（Ｃ）に示すように、該水平面２０８上の前後に、図示しない緩衝材を介在させて、前記上段ブロック片２０９ａ、２０９ｂを、前記遮水シート１８７を挾持するように載置する。そして、該上段ブロック片２０９ａ、２０９ｂを、前記のようにボルト２１９で連結することによって一体化し、該遮水シート１８７を圧縮状態とする。   Thereafter, as shown in FIG. 23C, the upper block pieces 209a and 209b are placed on both sides of the horizontal plane 208 so as to sandwich the water shielding sheet 187 with a cushioning material (not shown) interposed therebetween. To do. Then, the upper block pieces 209a and 209b are integrated by connecting with the bolts 219 as described above, and the water shielding sheet 187 is brought into a compressed state.

そして、かかる施工過程において前記下段ブロック片２０５ａ，２０５ｂと中段ブロック片２０６ａ，２０６ｂとを、中段ブロック片２０６ａ，２０６ｂと上段ブロック片２０９ａ，２０９ｂとを、夫々、ブロックの前面１９３とブロックの後面１９９において、前記のように連結プレート２１１で連結し、全体を一体化する。   In the construction process, the lower block pieces 205a and 205b and the middle block pieces 206a and 206b, the middle block pieces 206a and 206b and the upper block pieces 209a and 209b, respectively, the front surface 193 of the block and the rear surface 199 of the block, respectively. In the above, the connection plate 211 is connected as described above, and the whole is integrated.

このようにして構成された遮水壁部１７は、その前後の面２１１，２２２（図２〜３）が傾斜しており側面視で台形状を呈するため、これを土中に埋設する際に密実に土を充填することができ、その周辺に隙間を生じさせにくい。   Since the front and rear surfaces 211 and 222 (FIGS. 2 and 3) are inclined and have a trapezoidal shape in a side view, the impermeable wall portion 17 configured in this way has a trapezoidal shape when buried in the soil. It can be filled with soil densely, and it is difficult to create a gap around it.

前記柔管路構造物１２は図２４〜２５に示すように、例えば５０００ｍｍ長さの、可撓性を有する樹脂管２２３，２２３相互を、図２５に示すように、可撓性継手部２２５を介して順次連結することにより構成されている。該樹脂管２２３は例えば、軸線方向に円形の水路（内径は、例えば６００ｍｍ）２２６が設けられたポリエチレン製の円筒管の外周面２２７にリブ２２９が螺旋状に巻回され該外周面２２７に固定されてなる、耐圧性と可撓性を有する樹脂管本体２３０を具える。そして、該樹脂管本体２３０の後端２３１に、連結筒部２３２が一連に設けられており、図２５に示すように、該連結筒部２３２の外周面の前端側に周設された嵌着溝２３３にリング状を呈するブチルゴム等のゴム製シール部材２３５が嵌着されている。又、該樹脂管本体２３０の前端２３６には、隣り合う樹脂管２２３の前記連結筒部２３２を嵌め入れることのできるソケット部２３７が設けられており、該ソケット部２３７に該連結筒部２３２を嵌め入れることにより、該ゴム製シール部材２３５が適宜弾性圧縮状態となって弾性的に屈曲し得る前記可撓性継手部２２５を介して、樹脂管２２３，２２３相互が連結される。   24 to 25, the flexible pipe structure 12 includes, for example, 5000 mm long flexible resin pipes 223 and 223, and a flexible joint portion 225 as shown in FIG. It is comprised by connecting sequentially. For example, the resin tube 223 is fixed to the outer peripheral surface 227 by spirally winding a rib 229 around the outer peripheral surface 227 of a polyethylene cylindrical tube provided with a circular water channel (an inner diameter is, for example, 600 mm) 226 in the axial direction. A resin tube main body 230 having pressure resistance and flexibility is provided. A series of connecting tube portions 232 are provided at the rear end 231 of the resin tube main body 230. As shown in FIG. 25, the fitting is provided around the front end side of the outer peripheral surface of the connecting tube portion 232. A rubber seal member 235 such as butyl rubber having a ring shape is fitted in the groove 233. The front end 236 of the resin tube main body 230 is provided with a socket portion 237 into which the connecting tube portion 232 of the adjacent resin tube 223 can be fitted, and the connecting tube portion 232 is attached to the socket portion 237. By fitting, the resin seals 223 and 223 are connected to each other through the flexible joint portion 225 that can be elastically bent when the rubber seal member 235 is appropriately compressed.

樹脂管２２３，２２３相互を該可撓性継手部２２５を介して順次連結して構成された柔管路構造物１２は、該樹脂管２２３そのものが可撓性を有すると共に、該可撓性継手部２２５が、その軸線方向に多少伸長できしかも回転変形できる可撓性を有するため、該柔管路構造物１２は全体として可撓性を有する。そして該可撓性継手部２２５においては、前記ゴム製シール部材２３５が弾性圧縮状態となるために継手部の止水が確保される。   In the flexible pipe structure 12 configured by sequentially connecting the resin pipes 223 and 223 through the flexible joint portion 225, the resin pipe 223 itself has flexibility and the flexible joint. Since the portion 225 is flexible enough to extend in the axial direction and can be rotationally deformed, the flexible duct structure 12 as a whole has flexibility. In the flexible joint portion 225, the rubber seal member 235 is in an elastically compressed state, so that water stoppage of the joint portion is ensured.

かかる構成を有する柔管路構造物１２の、その後端のソケット部２３７に前記可撓性樹脂管１３９の後端側部分１３９ａが、図１８に示すように嵌め込まれることにより、該柔管路構造物１２が前記可撓性連結部１１を介して前記剛管路構造物１０に連結されてなる前記複合型底樋１（図１）が構築されることになる。該可撓性連結部１１は、図１８に示すように、該ソケット部２３７に前記後端側の部分１３９ａが差し込まれることによって、前記ゴム製シール部材１４９が適宜弾性圧縮状態となるため、連結部がその軸線方向に多少伸長できしかも回転変形できる可撓性を有しており、又、該可撓性連結部１１においては、前記ゴム製シール部材１４９が弾性圧縮状態となるために連結部の止水が確保されている。   When the flexible resin pipe 139 has a rear end portion 139a fitted into the socket portion 237 at the rear end of the flexible pipe structure 12 having such a configuration as shown in FIG. The composite bottom rod 1 (FIG. 1) in which the object 12 is connected to the rigid pipe structure 10 through the flexible connecting portion 11 is constructed. As shown in FIG. 18, the flexible connecting portion 11 is connected to the socket portion 237 because the rubber seal member 149 is appropriately elastically compressed by inserting the rear end portion 139a. The flexible portion can be extended slightly in the axial direction and can be rotationally deformed. In the flexible connecting portion 11, the rubber seal member 149 is in an elastically compressed state, so that the connecting portion Water stoppage is secured.

そして、かかる構成を有する柔管路構造物１２の後端（前記外端）としての前記排出口４１は、図５に示すように、枡部２３９の側壁部２４０に設けた孔部２４１に連結され、該枡部２３９内に排出された溜池の貯留水を水路部材２４２を介して水田等に供給可能となされている。   And the said discharge port 41 as a rear end (the said outer end) of the flexible pipe structure 12 which has this structure is connected with the hole part 241 provided in the side wall part 240 of the collar part 239, as shown in FIG. In addition, the water stored in the reservoir discharged into the eaves 239 can be supplied to a paddy field or the like via the water channel member 242.

このようにして構築された前記取水構造物２２上、前記剛管路構造物１０上、前記遮水壁部１７上、及び、前記柔管路構造物１２上に所要に盛土されて前記堤体３（図１）が構築される。その際、前記剛管路構造物１０は、図２６に示すように、下面２４３が平坦（本実施例では水平）であるため、このように盛土する際、該剛管路構造物１０の下部２４４に密実に土を充填することができ、その周辺に隙間を生じさせにくい。   On the intake structure 22 constructed in this manner, on the rigid pipe structure 10, on the impermeable wall portion 17 and on the soft pipe structure 12, the embankment body is filled as required. 3 (FIG. 1) is constructed. At this time, as shown in FIG. 26, since the lower surface 243 of the rigid pipe structure 10 is flat (horizontal in the present embodiment), when embanking in this way, the lower part of the rigid pipe structure 10 is provided. 244 can be filled with soil densely, and it is difficult to create a gap around it.

次に、かかる構成を有する複合型底樋１の作用を説明する。該扉体２３は、図９（Ａ）、図１０（Ａ）に示すように、常時は最下降状態とし、前記排泥用開口部２５を閉じた状態にしておく。そして、溜池２の貯留水６を堤体外に排出するに際しては、前記斜樋１１２（図１２）に設けられている取水口１１５，１１６，１１０の所要のものを、前記ハンドル１２２で前記操作ロッド１１９を回転操作して開放する。これにより、図１１に示すように、溜池２の貯留水６を、前記下端樋部３０を介して前記取水構造物２２に流入させることができ、該貯留水を、前記剛管路構造物１０と前記柔管路構造物１２を通して流し、該柔管路構造物１２の前記排出口４１で前記枡部２３９内に排出させることができる。   Next, the operation of the composite bottom rod 1 having such a configuration will be described. As shown in FIGS. 9 (A) and 10 (A), the door body 23 is always in the lowest lowered state and the drainage opening 25 is closed. Then, when discharging the stored water 6 in the reservoir 2 to the outside of the dam body, the necessary rods 115, 116, 110 provided in the slope 112 (FIG. 12) are connected to the operation rod by the handle 122. 119 is rotated to release. As a result, as shown in FIG. 11, the stored water 6 in the reservoir 2 can be caused to flow into the intake structure 22 via the lower end flange 30, and the stored water is supplied to the rigid pipe structure 10. And flow through the soft duct structure 12 and can be discharged into the flange portion 239 through the discharge port 41 of the soft duct structure 12.

そして、溜池２の底部に堆積した泥状物を排除するに際しては、前記昇降装置９２をハンドル９５の回転操作によって作動させ、前記扉体２３を上昇させて前記排泥用開口部２５を開放させる。これにより、溜池２内に残留している貯留水が該排泥用開口部２５を通して複合型底樋１内に一気に流入するが、これと同時に泥状物も流入するため、この泥状物を前記枡部２３９内に順次排出させることができる。   Then, when removing the mud accumulated on the bottom of the reservoir 2, the lifting device 92 is operated by rotating the handle 95, and the door body 23 is raised to open the mud opening 25. . As a result, the stored water remaining in the reservoir 2 flows into the composite bottom gutter 1 through the mud opening 25 at the same time, but at the same time, the muddy material also flows. It can be discharged sequentially into the flange 239.

ところで前記溜池の堤体３は全体が土構造物であり、図１に示すように、溜池側としての内側部分をなす遮水性ゾーン７と、該遮水性ゾーン７の外側部分をなす本体ゾーン９とから構成されているため、該遮水性ゾーン７を構成する土と該本体ゾーン９を構成する土とは、圧縮による沈下等の性状が異なる。又、堤体３の断面外形が台形状を呈するために、土構造物である該堤体３の沈下が不均一に発生することになる。   By the way, the dam body 3 of the basin is entirely a soil structure, and as shown in FIG. Therefore, the soil constituting the water-impervious zone 7 and the soil constituting the main body zone 9 have different properties such as settlement due to compression. Moreover, since the cross-sectional outer shape of the levee body 3 has a trapezoidal shape, the subsidence of the dam body 3 which is a soil structure occurs unevenly.

このように堤体３は、その構造上から、土の沈下を回避し難いのであるが、溜池の堤体における底樋には、かかる沈下に極力影響されないで、該堤体３における漏水を抑制して溜池における取水を確実に行わせると共に、前記のように、溜池２の底部に堆積した泥状物の排除を容易且つ確実に行わせることが要求される。取り分け重要なことは、溜池２の貯留水の漏水を防止するための遮水壁部１７を有すると共に、取水用の樋体の下端樋部３０が連結されており、然も、排泥用開口部２５を開閉する扉体２３が付設されてなる剛管路構造物１０を、長期間に亘って安定的に維持させることである。   In this way, because of the structure of the levee body 3, it is difficult to avoid soil subsidence, but the bottom basin of the basin of the basin is not affected by such subsidence as much as possible and suppresses water leakage in the dam body 3. Thus, it is required that water is reliably taken in the basin, and as described above, the mud accumulated on the bottom of the basin 2 is easily and reliably removed. What is particularly important is that it has a water shielding wall 17 for preventing leakage of the stored water in the reservoir 2 and is connected to the lower end flange 30 of the water intake housing. The rigid pipe structure 10 provided with the door body 23 for opening and closing the portion 25 is stably maintained for a long period of time.

本発明はかかる要求に応じ得るのであるが、これを以下具体的に説明する。
(1) 堤体における漏水抑制について
前記のように構成された複合型底樋１は、図１に示すように、前記剛管路構造物１０に、可撓性連結部１１を介して、柔管路構造物１２が連結されている。然して、かかる構成を有する複合型底樋１によるときは、前記柔管路構造物１２の有する前記可撓性によって、前記本体ゾーン９の沈下に追従して該柔管路構造物１２が下方に向けて緩やかに無理なく湾曲変形できる。該柔管路構造物１２がこのように湾曲変形したことに伴いその前端部分２４５が沈下したり傾いたりする等の変形を生ずるが、この変形は前記可撓性連結部１１で吸収される。 The present invention can meet such a requirement, and this will be specifically described below.
(1) Inhibition of water leakage in the levee body As shown in FIG. 1, the composite bottom gutter 1 configured as described above is connected to the rigid pipe structure 10 via a flexible connecting portion 11. The pipe line structure 12 is connected. However, when the composite bottom rod 1 having such a configuration is used, the flexibility of the flexible pipe structure 12 follows the sinking of the main body zone 9 so that the flexible pipe structure 12 moves downward. Can be curved and deformed gently and comfortably. As the soft duct structure 12 is bent and deformed in this way, its front end portion 245 is deformed such as sinking or tilting, but this deformation is absorbed by the flexible connecting portion 11.

そして、該剛管路構造物１０は前記したように、コンクリート製で重量が大であり、且つ全体が剛構造物であって撓み変形せず、又、該剛管路構造物１０は、沈下しにくい遮水性ゾーン７で構築されていることから沈下することもない。   Further, as described above, the rigid pipe structure 10 is made of concrete and has a large weight, and the entire rigid pipe structure 10 is a rigid structure and is not deformed by bending. Since it is constructed in the water-impervious zone 7 which is difficult to perform, it does not sink.

かかることから、柔管路構造物１２が撓み変形したとしても剛管路構造物１０はそれに影響されて沈下したり、垂直面内で回転方向に変形したりせず、それ故、該剛管路構造物１０の周辺に隙間が生じにくい。このような独特の作用効果に加え、該剛管路構造物１０は元々、漏水しにくい前記遮水性ゾーン７に配設されている。かかることから、溜池の貯留水が該剛管路構造物１０に沿って漏水する恐れが少ない。そして、該剛管路構造物１０の下面２４３が平坦に形成されているため（図２６）、前記のように盛土する際、該剛管路構造物１０の下部２４４に密実に土を充填することができ、該剛管路構造物１０の周辺に隙間を生じさせにくい。然も、本実施例においては前記のように、該剛管路構造物１０の下面側にベントナイト１８３が充填されており、これが水分を吸収して膨張し硬化することから、該剛管路構造物１０の下面側に隙間が生じにくい。そのため、このような漏水をより確実に防止できることになる。そして、経年変化や施工不良等によって多少の漏水が生じたとしても、前記のように、剛管路構造物１０の長さ方向の中間部位に遮水壁部１７が設けられているため、該遮水壁部１７によって該剛管路構造物１０に沿った水の流れを遮水できることになる。   Therefore, even if the flexible pipe structure 12 is bent and deformed, the rigid pipe structure 10 is not affected and does not sink or deform in the rotation direction in the vertical plane. It is difficult for a gap to be generated around the road structure 10. In addition to such a unique function and effect, the rigid pipe structure 10 is originally disposed in the water-impervious zone 7 which is difficult to leak. For this reason, there is little possibility that the water stored in the reservoir will leak along the rigid pipe structure 10. Since the lower surface 243 of the rigid pipe structure 10 is formed flat (FIG. 26), when the earth is filled as described above, the lower part 244 of the rigid pipe structure 10 is filled with soil densely. Therefore, it is difficult to generate a gap around the rigid pipe structure 10. However, in this embodiment, as described above, bentonite 183 is filled on the lower surface side of the rigid pipe structure 10, which absorbs moisture and expands and hardens. Therefore, the rigid pipe structure It is difficult for a gap to occur on the lower surface side of the object 10. Therefore, such water leakage can be prevented more reliably. And even if some water leakage occurs due to secular change, construction failure, etc., as described above, the water shielding wall 17 is provided at the intermediate portion in the length direction of the rigid pipe structure 10, The water flow along the rigid pipe structure 10 can be blocked by the water blocking wall 17.

遮水壁部１７による該遮水作用について更に説明すれば、前記のように、柔管路構造物１２が湾曲変形してもその変形の影響が前記剛管路構造物１０に及ばないことから、該遮水壁部１７が、垂直面内で回転方向に変形して該遮水壁部１７の周辺に隙間を生じさせるといった問題を生じさせない。従って、この隙間を通して溜池の貯留水が漏水するといった従来の問題点が解消されることになり、該遮水作用を長期間に亘って定期的に維持させ得ることになる。   If the water shielding action by the water shielding wall 17 is further described, even if the flexible pipe structure 12 is curved and deformed, the influence of the deformation does not reach the rigid pipe structure 10 as described above. The problem that the impermeable wall portion 17 is deformed in the rotational direction in the vertical plane to cause a gap around the impermeable wall portion 17 is not caused. Therefore, the conventional problem that the water stored in the basin leaks through this gap is solved, and the water shielding action can be maintained regularly over a long period of time.

(2) 取水の確実化と溜池の保守管理の確実化について
前記のように剛管路構造物１０は、全体が剛構造であって撓み変形せず、又、該剛管路構造物１０は沈下しにくい遮水性ゾーン７で構築されていて沈下しにくい。しかも、前記柔管路構造物１２の湾曲変形によって、その前端が沈下したり傾いたりする等の変形を生じても、この変形は前記可撓性連結部１１で吸収され、該剛管路構造物１０の構造的な安定性が長期間に亘って維持される。 (2) Ensuring water intake and ensuring maintenance management of the reservoir As mentioned above, the rigid pipe structure 10 is entirely rigid and does not bend and deform, and the rigid pipe structure 10 Constructed in a water-impervious zone 7 that is unlikely to sink, and is unlikely to sink. Moreover, even if the flexible pipe structure 12 is deformed such that the front end thereof sinks or tilts, the deformation is absorbed by the flexible connecting portion 11, and the rigid pipe structure The structural stability of the object 10 is maintained over a long period of time.

かかることから、従来のように、前記遮水性ゾーン７と前記本体ゾーン９との境界部分で剪断力が作用して底樋破損を招いて漏水を生じさせたり、前記下端樋部３０の前記取水構造物２２に対する連結部２４６（図１１）が破損されて取水不良を生じさせたりすることがない。又該剛管路構造物１０が、垂直面内で回転方向に変形することがないため、これが接続される取水構造物２２の排泥用開口部２５を開閉する扉体２３の上下動作が阻害されることなく、排泥用開口部２５の開閉操作を長期間に亘って円滑に行うことができる。これによって、溜池２の維持管理のために、溜池２の底部に堆積した泥状物の排除を長期間に亘って容易且つ確実に行い得ることとなる。   For this reason, as in the prior art, a shearing force acts on the boundary between the water-impervious zone 7 and the main body zone 9 to cause bottom flaw breakage and cause water leakage, or the water intake of the lower end flange 30 The connection part 246 (FIG. 11) with respect to the structure 22 is not damaged and water intake failure is not caused. Further, since the rigid pipe structure 10 is not deformed in the rotational direction within the vertical plane, the vertical movement of the door body 23 that opens and closes the mud opening 25 of the intake structure 22 to which the rigid pipe structure 10 is connected is obstructed. Therefore, the opening / closing operation of the mud opening 25 can be smoothly performed over a long period of time. As a result, for the maintenance management of the reservoir 2, it is possible to easily and reliably remove the mud accumulated on the bottom of the reservoir 2 over a long period of time.

本発明は、前記実施例で示したものに限定されるものでは決してなく、「特許請求の範囲」の記載内で種々の設計変更が可能であることはいうまでもない。その一例を挙げれば次のようである。   The present invention is by no means limited to those shown in the above-described embodiments, and it goes without saying that various design changes can be made within the scope of the claims. One example is as follows.

(1) 前記剛管路構造物１０は、現場打ち施工によって構築されることもある。 (1) The rigid pipe structure 10 may be constructed by on-site construction.

(2) 前記剛管路構造物１０と前記柔管路構造物１２とを連結する前記可撓性連結部１１は、該剛管路構造物１０と該柔管路構造物１２の夫々の連結側の端面に端部分がフランジ等を介してボルト連結された、例えばゴム製円筒状を呈する可撓性連結部等であってもよい。 (2) The flexible connecting portion 11 that connects the rigid pipe structure 10 and the soft duct structure 12 is connected to each of the rigid pipe structure 10 and the soft duct structure 12. For example, it may be a flexible connecting portion or the like having a cylindrical shape made of rubber, for example, having an end portion bolted to a side end surface via a flange or the like.

(3) 前記暗渠ブロック１２３を前記支持板１８１で支持する場合、隣り合う支持板間にベントナイトだけ充填することの他、ベントナイトに砂や土を混合してなる混合充填材を充填することもある。 (3) When the culvert block 123 is supported by the support plate 181, in addition to filling only bentonite between adjacent support plates, it may be filled with a mixed filler formed by mixing sand or earth with bentonite. .

(4) 前記剛管路構造物１０は、その下面側にベントナイトが充填されないこともある。 (4) The rigid pipe structure 10 may not be filled with bentonite on its lower surface side.

(5) 前記剛管路構造物１０を、施工箇所の設置面に敷設した支持板１８１上に載置する場合、該支持板１８１は、図１３に示すように該剛管路構造物１０の下面２４３の幅方向全長に亘ものではなく、幅方向の左右部分にのみ配設されることもある。 (5) When the rigid pipe structure 10 is placed on the support plate 181 laid on the installation surface of the construction site, the support plate 181 is provided on the rigid pipe structure 10 as shown in FIG. The lower surface 243 may not be disposed over the entire length in the width direction but may be disposed only in the left and right portions in the width direction.

(6) 前記遮水壁部１７は、現場打ち施工よって構築されてもよい。又、該遮水壁部１７を、プレキャストコンクリート製の部材を接合一体化して構築する場合、施工現場における施工性を考慮して、前後や左右、上下に所要に分割された分割ブロック片を連結一体化して構築できる。 (6) The water-impervious wall portion 17 may be constructed by on-site construction. In addition, when the impermeable wall portion 17 is constructed by joining and integrating precast concrete members, the divided block pieces that are divided into the front, rear, left, and right and up and down are connected in consideration of workability at the construction site. Can be integrated and built.

(7) 図２７においては、前記剛管路構造物１０の下面１３が傾斜状態の平坦な面として形成された場合の一実施例を示すものであり、前記後の端面板４９の後面の中央部分に、前記第１の暗渠ブロック１２３の前端部分２００を、その軸線が下方に若干傾斜した状態で嵌め入れるための傾斜調整凹部２４７が設けられている。該傾斜調整凹部２４７は、その底面２４９が下方に向けて前方に傾斜することにより、下方に向けて順次深くなるように構成されており、その傾斜角度は、前記複合型底樋１が所要水勾配を有するように、例えば１度に設定される。 (7) FIG. 27 shows an embodiment in which the lower surface 13 of the rigid pipe structure 10 is formed as an inclined flat surface, and the center of the rear surface of the rear end face plate 49 is shown. The portion is provided with an inclination adjusting recess 247 for fitting the front end portion 200 of the first underdrain block 123 with its axis slightly inclined downward. The inclination adjusting recess 247 is configured so that its bottom surface 249 is inclined forward and downward, and is gradually deepened downward. For example, it is set to 1 degree so as to have a gradient.

本発明に係る複合型底樋が配設された溜池の堤体を示す断面図である。It is sectional drawing which shows the bank body of the basin in which the composite type | mold bottom foot concerning this invention was arrange | positioned. その溜池側の部分を示す拡大図である。It is an enlarged view which shows the part by the side of the reservoir. 剛管路構造物と、それが連結される取水構造物と、柔管路構造物の前側部分を示す断面部である。It is a cross-sectional part which shows the rigid pipe line structure, the water intake structure to which it is connected, and the front side part of a soft pipe line structure. 剛管路構造物に可撓性連結部を介して柔管路構造物を連結した状態を示す断面図である。It is sectional drawing which shows the state which connected the soft duct structure to the rigid duct structure via the flexible connection part. 柔管路構造物の外端を枡部に連結した状態を示す断面図である。It is sectional drawing which shows the state which connected the outer end of the soft duct structure to the collar part. 取水構造物を示す斜視図である。It is a perspective view which shows a water intake structure. 取水構造物を構成する部材相互の連結状態を示す断面図である。It is sectional drawing which shows the connection state of the members which comprise a water intake structure. 取水構造物と剛管路構造物を構成する部材を示す斜視図である。It is a perspective view which shows the member which comprises a water intake structure and a rigid pipe line structure. 取水構造物の排泥用開口部を扉体で開閉する作用を説明する正面図である。It is a front view explaining the effect | action which opens and closes the opening part for mud discharge of a water intake structure with a door body. その断面図である。FIG. 取水構造物に対する止水用の樋体の連結状態を説明する断面図である。It is sectional drawing explaining the connection state of the housing for water stop with respect to a water intake structure. 取水構造物に連結される斜樋と、該斜樋に設けた取水口を開閉する開閉装置を示す説明図である。It is explanatory drawing which shows the open / close device which opens and closes the slope which is connected to a water intake structure, and the water intake provided in this slope. 剛管路構造物に、取水構造物と遮水壁部と柔管路構造物が連結された状態を示す斜視図である。It is a perspective view which shows the state by which the intake structure, the impermeable wall part, and the soft pipe structure were connected to the rigid pipe structure. その断面図である。FIG. 取水構造物と第１の暗渠ブロックとの連結状態及び、第１の暗渠ブロック相互の連結状態を示す断面図である。It is sectional drawing which shows the connection state of a water intake structure and a 1st culvert block, and the connection state of a 1st culvert block. この連結に用いる連結棒をナットで締め付けた状態と、暗渠ブロックの端面に弾性シール材を取り付けた状態を示す断面図である。It is sectional drawing which shows the state which fastened the connecting rod used for this connection with the nut, and the state which attached the elastic sealing material to the end surface of the culvert block. 剛管路構造物に柔管路構造物を可撓性連結部を介して連結した状態を示す断面図である。It is sectional drawing which shows the state which connected the flexible pipe line structure to the rigid pipe line structure through the flexible connection part. その連結部分の拡大図である。It is an enlarged view of the connection part. 剛管路構造物を支持する支持板間にベントナイトを充填した状態を示す断面図である。It is sectional drawing which shows the state with which the bentonite was filled between the support plates which support a rigid pipe line structure. 遮水壁部を構成する前壁部材と後壁部材を、遮水シートと共に示す斜視図である。It is a perspective view which shows the front wall member and rear wall member which comprise a water-impervious wall part with a water-impervious sheet. 前壁部材と後壁部材の分解斜視図である。It is a disassembled perspective view of a front wall member and a rear wall member. 前壁部材と後壁部材をボルト連結した状態を示す側面図である。It is a side view which shows the state which bolted the front wall member and the rear wall member. 遮水壁部を構築する施工工程を説明する説明図である。It is explanatory drawing explaining the construction process which builds a water-impervious wall part. 可撓性連結部が突設された剛管路構造物と、柔管路構造物を構成する樹脂管を示す斜視図である。It is a perspective view which shows the rigid pipe line structure in which the flexible connection part was protrudingly provided, and the resin pipe which comprises a soft pipe line structure. 樹脂管相互を可撓性継手部を介して連結した状態を示す断面図である。It is sectional drawing which shows the state which connected the resin pipes through the flexible coupling part. 剛管路構造物の横断面図である。It is a cross-sectional view of a rigid pipe line structure. 下面が傾斜状態の平坦な面として形成された剛管路構造物を示す断面図と、該剛管路構造物の前端部分を嵌め入れる傾斜調整凹部を具えた止水構造物の後側部分を示す斜視図である。A cross-sectional view showing a rigid pipe structure having a lower surface formed as a flat surface with an inclined state, and a rear portion of a water-stopping structure having an inclination adjusting recess into which a front end portion of the rigid pipe structure is fitted. It is a perspective view shown. 従来における溜池の堤体の底樋構造を説明する断面図である。It is sectional drawing explaining the bottom dredging structure of the bank body of a conventional reservoir. その溜池側を示す拡大図である。It is an enlarged view which shows the reservoir side. 従来における溜池の堤体の底樋構造の他の態様を示す断面図である。It is sectional drawing which shows the other aspect of the bottom wall structure of the bank body of a conventional reservoir. その溜池側を示す拡大図である。It is an enlarged view which shows the reservoir side.

符号の説明Explanation of symbols

１ 複合型底樋
２ 溜池
３ 堤体
６ 貯留水
７ 遮水性ゾーン
９ 本体ゾーン
１０ 剛管路構造物
１２ 柔管路構造物
１３ 下面
１５ 水路
１７ 遮水壁部
２０ 遮水鍔部
２２ 取水構造物
２３ 扉体
２５ 排泥用開口部
２７ 取水用の樋体
２９ 斜樋
３０ 下端樋部
３１ 樹脂管
３２ 可撓性継手部
３３ 水路
４１ 排出口
５１ 連結棒
６９ 連結軸
７３ ナット
８５ ベントナイト
９２ 昇降装置
１２３ 暗渠ブロック
１８１ 支持板
２２３ 樹脂管
２２５ 可撓性継手部
２３７ ソケット部
２４３ 剛管路構造物の下面 DESCRIPTION OF SYMBOLS 1 Composite type bottom basin 2 Reservoir 3 Levee body 6 Reserved water 7 Water-impervious zone 9 Main body zone 10 Rigid pipe structure 12 Soft pipe structure 13 Lower surface 15 Water channel 17 Water-impervious wall part 20 Water-impervious ridge part 22 DESCRIPTION OF SYMBOLS 23 Door body 25 Opening part for mud discharge 27 Housing | casing for water intake 29 Bevel 30 Lower end flange 31 Resin pipe 32 Flexible joint part 33 Water channel 41 Discharge port 51 Connecting rod 69 Connecting shaft 73 Nut 85 Bentonite 92 Lifting device 123 Underdrain block 181 Support plate 223 Resin pipe 225 Flexible joint part 237 Socket part 243 Lower surface of rigid pipe structure

Claims (3)

溜池の堤体の下端部分に該下端部分を水平に横切るように設けられて溜池の貯留水を排出可能とする、溜池の堤体における複合型底樋であって、
前記堤体の溜池側としての内側部分をなす、溜池の貯留水が漏水するのを防止する遮水性ゾーンで構築された剛構造の剛管路構造物に、可撓性連結部を介して、堤体の前記遮水性ゾーンの外側部分をなす本体ゾーンで構築された柔構造の柔管路構造物を連結してなり、
前記剛管路構造物は、下面が平坦であり且つ軸線方向に水路が設けられたコンクリート製の暗渠であり、又、該管路構造物の長さ方向の中間部位に、該中間部位を周方向に取り囲むように該中間部位の外面で突設されたコンクリート製の遮水鍔部を有する遮水壁部が設けられてなり、該剛管路構造物の、前記溜池側の内端部は取水構造物に連結されており、該取水構造物には、前記溜池で開放され且つ扉体により開閉可能となされた排泥用開口部が設けられてなり、又、該取水構造物の上部分には、前記堤体の内側部分において配設された、前記貯留水を取水するための樋体の下端樋部が連結されており、
又、前記柔管路構造物は、可撓性を有する樹脂管相互を可撓性継手部を介して順次連結することにより構成されており、該柔管路構造物の内端部は前記可撓性連結部を介して前記剛管路構造物に連結されると共にその外端は、堤体外に前記貯留水を排出するための排出口とされていることを特徴とする溜池の堤体における複合型底樋。 A composite bottom wall in the basin of the basin, provided at the lower end of the basin of the basin so as to horizontally traverse the lower end, and allowing the stored water of the basin to be discharged,
To the rigid structure of the rigid pipe constructed by a water-impervious zone that prevents the leakage of the water stored in the reservoir, which forms the inner part of the bank as the reservoir side, via a flexible connecting part, A flexible pipe structure constructed by a main body zone that forms an outer part of the water-impervious zone of the dam body is connected,
The rigid pipe structure is a concrete culvert with a flat bottom surface and a water channel provided in the axial direction, and the intermediate part is surrounded by an intermediate part in the length direction of the pipe structure. A water-impervious wall portion having a concrete water-impervious trough protruding from the outer surface of the intermediate portion so as to surround in the direction, and the inner end portion of the rigid pipe structure on the basin side is It is connected to a water intake structure, and the water intake structure is provided with an opening for drainage that is opened at the reservoir and can be opened and closed by a door body, and an upper portion of the water intake structure. Is connected to the lower end flange of the casing for taking in the stored water, which is disposed in the inner part of the bank body,
The flexible pipe structure is constructed by sequentially connecting flexible resin pipes via flexible joints, and the inner end of the flexible pipe structure is the above-mentioned acceptable pipe structure. In the dam body of the basin characterized by being connected to the rigid pipe structure through a flexible connecting portion and having an outer end serving as a discharge port for discharging the stored water outside the dam body. Composite type bottom wall. 前記剛管路構造物は、プレキャストコンクリート製であり且つ軸線方向に水路が設けられた暗渠ブロックの複数個を水密に接合一体化して構築されており、該暗渠ブロックが、プレキャストコンクリート製の支持板で支持されると共に、隣り合う支持板間に、ベントナイト又は、ベントナイトが混合された混合充填材が充填されてなることを特徴とする請求項１記載の溜池の堤体における複合型底樋。   The rigid pipe structure is made of precast concrete and is constructed by watertightly joining and integrating a plurality of culvert blocks provided with water channels in the axial direction. The culvert block is a support plate made of precast concrete. The composite bottom gutter in a basin of a basin according to claim 1, wherein bentonite or a mixed filler mixed with bentonite is filled between adjacent support plates. 前記遮水壁部は、前記剛管路構造物の延長方向で見て前後に分割された、プレキャストコンクリート製の前壁部材と後壁部材との間で、前記暗渠ブロックの連結部に介在された遮水シートを挾持してなり、該遮水シートは、前記剛管路構造物の水路に連通する連通孔を有し、該連通孔の周縁部分は、前記暗渠ブロック間で挾持された状態にあり、又、前記前壁部材と前記後壁部材とは連結一体化されていることを特徴とする請求項２記載の溜池の堤体における複合型底樋。   The water-impervious wall portion is interposed in the connecting portion of the culvert block between a front wall member and a rear wall member made of precast concrete, which are divided forward and backward as viewed in the extending direction of the rigid pipe structure. The water shielding sheet has a communication hole communicating with the water channel of the rigid pipe structure, and the peripheral portion of the communication hole is sandwiched between the culvert blocks The composite bottom gutter in a pond body of a basin according to claim 2, wherein the front wall member and the rear wall member are connected and integrated.
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