JP3946028B2 - Transmission type sabo dam - Google Patents

Transmission type sabo dam Download PDF

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Publication number
JP3946028B2
JP3946028B2 JP2001334137A JP2001334137A JP3946028B2 JP 3946028 B2 JP3946028 B2 JP 3946028B2 JP 2001334137 A JP2001334137 A JP 2001334137A JP 2001334137 A JP2001334137 A JP 2001334137A JP 3946028 B2 JP3946028 B2 JP 3946028B2
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JP
Japan
Prior art keywords
buffer means
dam
transmission type
sabo dam
type sabo
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JP2001334137A
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Japanese (ja)
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JP2002180442A (en
Inventor
精次 若松
脩 福知
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JFE Metal Products and Engineering Inc
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JFE Metal Products and Engineering Inc
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather

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Description

【0001】
【発明の属する技術分野】
この発明は、透過型砂防ダム、特に、洪水時の巨礫の衝突によりダム本体が受ける衝突エネルギーを緩衝手段により緩衝して、ダム本体が受ける外力を軽減し、かくして、ダム本体の経済的設計を可能とし、しかも、損傷した緩衝手段を容易に交換できる透過型砂防ダムに関するものである。
【0002】
【従来の技術】
透過型砂防ダムは、大洪水と土石流を阻止し、平常時および中小洪水時には土砂を下流側に流下させて、計画的にダムの空容量を確保し、且つ、自然の摂理に合致する等、土砂を流下させない不透過型ダムにはない利点を有している。
【0003】
代表的な透過型砂防ダムには、図16の斜視図で示される格子型鋼製砂防ダムと、図17の斜視図で示されるスリット型鋼製砂防ダムと、図18の斜視図で示されるスリット型コンクリート製砂防ダムとがある。
【0004】
格子型鋼製砂防ダムは、開口が鉛直方向と水平方向に仕切られているものであり、スリット型ダムは、鉛直方向に開口しているものである。鋼製の透過型砂防ダムの一例としては、基礎コンクリート1と、基礎コンクリート1上(または地盤上)に固定された鋼管製柱材2と、柱材2間に固定された鋼管製梁材3とからなっており、格子型鋼製砂防ダムの場合は、鋼管製斜材4がある。柱材2と梁材3または斜材4とにより構成されている骨組は、鋼管製つなぎ梁材5により隣の骨組に連結されており、それぞれの部材端部は、互いにフランジ結合されている。なお、柱材、梁材、つなぎ梁材は、鋼管製とは限らず、他の鋼製材料、例えば、H形鋼等の形鋼材の場合もある。
【0005】
上述した、鋼製透過型砂防ダムにおいて、洪水時の巨礫の衝突エネルギーは、以下のようにして吸収される。
(1)巨礫の衝突点における鋼管の塑性凹み変形エネルギーに変換。
(2)巨礫が衝突した部材の梁としての塑性変形エネルギーに変換。
(3)ダム本体の塑性変形エネルギーに変換。
【0006】
【発明が解決しようとする課題】
洪水時の巨礫の衝突による鋼管製部材およびダム本体の塑性変形により、砂防ダムとしての機能が低下したような場合には、損傷部分を新たな部材と交換するか、損傷部分を補強する必要があった。しかしながら、この作業には、多大な困難と費用を要する。
【0007】
従って、この発明の目的は、洪水時の巨礫の衝突によりダム本体が受ける衝突エネルギーを緩衝手段により緩衝して、ダム本体が受ける外力を軽減し、かくして、ダム本体の経済的設計を可能とし、しかも、損傷した緩衝手段を容易に交換できる透過型砂防ダムを提供することにある。
【0008】
【課題を解決するための手段】
請求項1記載の発明は、洪水時の巨礫の衝突エネルギーを吸収するための緩衝手段がダム本体の上流面に、前記ダム本体に対してブラケットを介して着脱自在に取り付けられ、前記ブラケットは、前記緩衝手段の下流面側に面して取り付けられ、上流面側には露出しておらず、前記緩衝手段は、縦方向に複数本に分割されていることに特徴を有するものである。
【0009】
請求項2記載の発明は、洪水時の巨礫の衝突エネルギーを吸収するための緩衝手段がダム本体の上流面に、前記ダム本体に対してブラケットを介して着脱自在に取り付けられ、前記ブラケットは、前記緩衝手段の下流面側に面して取り付けられ、上流面側には露出しておらず、前記ブラケットは、弾性緩衝材を介して前記ダム本体に取り付けられていることに特徴を有するものである。
【0010】
請求項3記載の発明は、請求項2記載の発明において、前記緩衝手段は、複数本に分割されていることに特徴を有するものである。
【0011】
請求項4記載の発明は、請求項1から3のうちの何れか1つに記載の発明において、 前記ダム本体は、基礎コンクリート上または地盤上に固定された鋼製支柱と、前記支柱間に固定された鋼製梁材とからなることに特徴を有するものである。
【0012】
請求項5記載の発明は、請求項1から4のうちの何れか1つに記載の発明において、前記緩衝手段は、その水平断面形状が閉断面である部材からなっていることに特徴を有するものである。
【0013】
請求項6記載の発明は、請求項1から5のうちの何れか1つに記載された発明において、前記緩衝手段は、円筒状鋼管からなっていることに特徴を有し、請求項7記載の発明は請求項1から6のうちの何れか1つに記載された発明において、前記緩衝手段は、半円筒状鋼管からなっていることに特徴を有するものである。
【0014】
【発明の実施の形態】
この発明の、透過型砂防ダムの一実施態様を、図面を参照しながら説明する。
【0015】
図1は、この発明の透過型砂防ダムを示す側面図、図2は、図1の透過型砂防ダムを上流側から見た正面図、図3は、この発明の透過型砂防ダムの別の結合エレメントを示す断面図、図4は、図1のA−A線断面図、図5は、別の緩衝手段を示す断面図、図6は、更に別の緩衝手段を示す断面図、図7は、別の方法により柱材に固定した緩衝手段を示す断面図、図8は、結合エレメントに固定した緩衝手段を示す断面図、図9は、結合エレメントに固定した緩衝手段を示す部分側面図、図10は、別の方法により結合エレメントに固定した緩衝手段を示す断面図、図11は、別の方法により結合エレメントに固定した緩衝手段を示す部分側面図、図12は、分割した緩衝手段を設けた、この発明の透過型砂防ダムを示す部分側面図、図13は、この発明の別の透過型砂防ダムを示す側面図、図14は、この発明の更に別の透過型砂防ダムを示す斜視図、図15は、この発明の更に別の透過型砂防ダムを示す側面図である。
【0016】
図1から図15において、1は、基礎コンクリート、6は、基礎コンクリート1上に固定された鋼管製柱材である。なお、6Aは、上流側柱材を示す。7は、柱材6間に固定された鋼管製梁材である。梁材7は、それぞれ鋼管によって構成された水平梁材7Aと傾斜梁材7Bとつなぎ梁材7Cとから構成されている。8は、柱材6と梁材7とを互いに結合するための鋼製箱状結合エレメントであり、内部にコンクリート9が充填されている。なお、8Aは、上流側の結合エレメントを示す。結合エレメント8は、多面体の箱状部材からなり、箱状部材の各面に柱材6と梁材7の結合端部が、以下のようにして結合されている。
【0017】
なお、柱材6および梁材7(水平梁材7A、傾斜梁材7B、つなぎ梁材7C)は、断面円形や断面角形の鋼管以外にH形鋼等の形鋼であっても良い。
【0018】
柱材6および梁材7の結合端部は、箱状結合エレメント8の壁面を貫通してコンクリート9に埋設され、そして、柱材6および梁材7の各々の軸芯(l)は、図1および図2に示すように、結合エレメント8内の一点(O)に集中している。なお、柱材6および梁材7の端部外面に鋼板10を固定すれば、骨組の建方が容易に行える。
【0019】
このように、柱材6および梁材7の各々の軸芯(l)を、箱状結合エレメント8内の一点(O)に集中させることによって、力の伝達が明解且つ簡潔になり、かくして、合理的で経済的なダム設計が可能となる。しかも、結合エレメント8と柱材6および梁材7との結合にフランジ結合を用いないことによって、骨組の製作および現物による架設が容易となる。
【0020】
なお、図1に示すように、頂部の結合エレメント8は、経済上、必ずしも軸芯を一致させない構造にしても良い。勿論、図中、二点鎖線で示すように、軸芯を一致させても良い。
【0021】
図3に示すように、結合エレメント8は、それぞれ鋼板からなるフランジ材11とウェブ材12と補強材13とによって構成し、結合エレメント8と柱材6および梁材7とをフランジ結合しても良い。
【0022】
14は、ダム本体の上流側の柱材6Aの前面にブラケット15を介してボルト16により着脱自在に取り付けられた緩衝手段である。緩衝手段14に巨礫が衝突すると緩衝手段14が凹み変形する。これにより、衝突エネルギーが吸収されて、ダム本体の塑性変形が阻止あるいは軽減される。
【0023】
緩衝手段14は、図4に示すような円筒状鋼管、あるいは、図5に示すような半筒状鋼管等からなっているが、この形状以外の例えば、角筒状鋼管等であっても良い。また、分割構造のものでも良い。即ち、その水平断面形状が閉断面であれば良い。なお、これは柱材6Aに取り付け、その結果、組み合わせたことにより閉断面となる場合も含む。緩衝手段14は、図6に示すように、一本の柱材6Aに対して、複数本取り付けても良い。また、図7に示すように、緩衝手段14をゴム等の弾性緩衝材17を介して柱材6Aに取り付けても良い。この場合、弾性緩衝材17は、ブラケット15間に挟まれている。
【0024】
また、緩衝手段14は、上述のように柱材6Aに取り付ける以外に、図8および図9に示すように、上流側の結合エレメント8Aにブラケット15を介してボルト16により着脱自在に取り付けても良い。緩衝手段14を結合エレメント8Aに取り付けると、衝突エネルギーの伝達、分散がよりスムーズに行われる。この場合も、図10および図11に示すように、ブラケット15と結合エレメント8Aとの間にゴム等の弾性緩衝材17を挟み込んでも良い。
【0025】
更に、緩衝手段14は、図12に示すように、複数本に分割しても良い。緩衝手段14を複数本に分割すると、次のような利点がある。即ち、緩衝手段14が一本物であると、緩衝手段14が部分的に損傷した場合であっても一本の緩衝手段をそっくり新たなものと交換する必要があり、無駄であるが、複数本に分割すれば、損傷した緩衝手段のみの交換が可能となり、経済的である。
【0026】
以上は、柱材6および梁材7の軸芯が結合エレメント8内の一点に集中する構造のダム本体に緩衝手段14を取り付けた格子型鋼製砂防ダムであるが、図13に示すように、柱材6および梁材7の軸芯が一点に集中しない図16の従来の格子型鋼製砂防ダム本体に緩衝手段14を取り付けても良い。また、図14に示すように、図17のスリット型鋼製砂防ダム本体に緩衝手段14を取り付けても良く、更に、図15に示すように、スリット型コンクリート製砂防ダム本体に緩衝手段14を取り付けても良い。
【0027】
何れの場合も、緩衝手段14に巨礫が衝突すると緩衝手段14が凹み変形する。これにより、衝突エネルギーが吸収されて、ダム本体の塑性変形が阻止あるいは軽減される。損傷した緩衝手段14は、ボルト16を緩めることにより新たなものと簡単に交換できる。
【0028】
【発明の効果】
以上説明したように、この発明によれば、洪水時の巨礫の衝突エネルギーを吸収するための緩衝手段を、ダム本体の上流面にダム本体に対して着脱自在に取り付けることによって、洪水時の巨礫の衝突によりダム本体が受ける衝突エネルギーを緩衝手段により緩衝して、ダム本体が受ける外力を軽減し、かくして、ダム本体の経済的設計を可能とし、しかも、損傷した緩衝手段を容易に交換できるといった有用な効果がもたらされる。
【図面の簡単な説明】
【図1】この発明の透過型砂防ダムを示す側面図である。
【図2】図1の透過型砂防ダムを上流側から見た正面図である。
【図3】この発明の透過型砂防ダムの別の結合エレメントを示す断面図である。
【図4】図1のA−A線断面図である。
【図5】別の緩衝手段を示す断面図である。
【図6】更に別の緩衝手段を示す断面図である。
【図7】別の方法により柱材に固定した緩衝手段を示す断面図である。
【図8】結合エレメントに固定した緩衝手段を示す断面図である。
【図9】結合エレメントに固定した緩衝手段を示す部分側面図である。
【図10】別の方法により結合エレメントに固定した緩衝手段を示す断面図である。
【図11】別の方法により結合エレメントに固定した緩衝手段を示す部分側面図である。
【図12】分割した緩衝手段を設けた、この発明の透過型砂防ダムを示す部分側面図である。
【図13】この発明の別の透過型砂防ダムを示す側面図である。
【図14】この発明の更に別の透過型砂防ダムを示す斜視図である。
【図15】この発明の更に別の透過型砂防ダムを示す側面図である。
【図16】格子型鋼製砂防ダムを示す斜視図である。
【図17】スリット型鋼製砂防ダムを示す斜視図である。
【図18】スリット型コンクリート製砂防ダムを示す斜視図である。
【符号の説明】
1:基礎コンクリート
2:柱材
3:梁材
4:斜材
5:つなぎ梁材
6:柱材
6A:上流側梁材
7:梁材
7A:水平梁材
7B:傾斜梁材
7C:つなぎ梁材
8:結合エレメント
8A:上流側結合エレメント
9:コンクリート
10:鋼板
11:フランジ材
12:ウェブ材
13:補強材
14:緩衝手段
15:ブラケット
16:ボルト
17:弾性緩衝材
[0001]
BACKGROUND OF THE INVENTION
The present invention reduces the external force received by the dam body by buffering the impact energy received by the dam body by the buffer means, particularly by the impact of the boulders during the flooding, and thus the economical design of the dam body. Further, the present invention relates to a transmission type sabo dam that can be easily replaced with a damaged buffer means.
[0002]
[Prior art]
Transmission type sabo dams prevent large floods and debris flows, and during normal and small and medium floods, sediments flow down to the downstream side, ensuring the capacity of the dam systematically and meeting natural providence, etc. It has advantages not found in impervious dams that do not allow sediment to flow down.
[0003]
A typical transmission-type sabo dam is shown in a lattice-type steel sabo dam shown in the perspective view of FIG. 16, a slit-type steel sabo dam shown in the perspective view of FIG. 17, and a perspective view of FIG. There is a slit type concrete sabo dam.
[0004]
The lattice-type steel sabo dam has an opening that is partitioned in the vertical direction and the horizontal direction, and the slit-type dam has an opening in the vertical direction. As an example of a steel transmission type sabo dam, foundation concrete 1, steel pipe column 2 fixed on foundation concrete 1 (or on the ground), and steel pipe beam 3 fixed between the columns 2 are used. In the case of a grid-type steel sabo dam, there is a steel pipe diagonal 4. A frame composed of the column member 2 and the beam member 3 or the diagonal member 4 is connected to an adjacent frame member by a steel pipe connecting beam member 5, and the respective end portions of the members are flange-coupled to each other. The column material, the beam material, and the connecting beam material are not limited to steel pipes, but may be other steel materials, for example, shape steel materials such as H-shaped steel.
[0005]
In the steel transmission sabo dam described above, the impact energy of boulders during flooding is absorbed as follows.
(1) Conversion into plastic dent deformation energy of steel pipe at the boulder impact point.
(2) Conversion into plastic deformation energy as a beam of a member collided with boulders.
(3) Converted into the plastic deformation energy of the dam body.
[0006]
[Problems to be solved by the invention]
If the function of the sabo dam is reduced due to plastic deformation of the steel pipe member and dam body caused by the impact of boulders during floods, it is necessary to replace the damaged part with a new member or reinforce the damaged part. there were. However, this operation requires great difficulty and cost.
[0007]
Therefore, the object of the present invention is to buffer the impact energy received by the dam body due to the collision of boulders during flooding by buffering means, thereby reducing the external force received by the dam body, thus enabling economic design of the dam body, Moreover, it is an object of the present invention to provide a transmission type sabo dam that can easily replace a damaged buffer means.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is characterized in that a buffer means for absorbing collision energy of boulders during a flood is detachably attached to the upstream surface of the dam body via a bracket with respect to the dam body, The shock absorber is attached so as to face the downstream surface side and is not exposed on the upstream surface side, and the shock absorber is divided into a plurality of pieces in the vertical direction .
[0009]
The invention according to claim 2 is characterized in that the buffer means for absorbing the collision energy of the boulders during the flood is detachably attached to the upstream surface of the dam body via the bracket, It is attached facing the downstream surface side of the buffer means, not exposed on the upstream surface side, and the bracket is attached to the dam body via an elastic buffer material. is there.
[0010]
The invention described in claim 3 is characterized in that, in the invention described in claim 2, the buffer means is divided into a plurality of pieces .
[0011]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the dam body includes a steel column fixed on foundation concrete or the ground, and the column. It is characterized by comprising a fixed steel beam material .
[0012]
The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the buffer means comprises a member whose horizontal sectional shape is a closed section. Is.
[0013]
The invention described in claim 6 is characterized in that, in the invention described in any one of claims 1 to 5, the buffer means is formed of a cylindrical steel pipe. The invention according to claim 1 is characterized in that , in the invention described in any one of claims 1 to 6, the buffer means comprises a semi-cylindrical steel pipe .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a transmission type sabo dam according to the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a side view showing a transmission type sabo dam according to the present invention, FIG. 2 is a front view of the transmission type sabo dam shown in FIG. 1 as viewed from the upstream side, and FIG. 4 is a cross-sectional view taken along line AA of FIG. 1, FIG. 5 is a cross-sectional view showing another buffering means, and FIG. 6 is a cross-sectional view showing still another buffering means. FIG. 8 is a cross-sectional view showing the buffer means fixed to the column member by another method, FIG. 8 is a cross-sectional view showing the buffer means fixed to the coupling element, and FIG. 9 is a partial side view showing the buffer means fixed to the coupling element. 10 is a cross-sectional view showing a buffer means fixed to the coupling element by another method, FIG. 11 is a partial side view showing the buffer means fixed to the coupling element by another method, and FIG. 12 is a divided buffer means. FIG. 13 is a partial side view showing a transmission type sabo dam according to the present invention. FIG. 14 is a perspective view showing still another transmission type sabo dam according to the present invention, and FIG. 15 is a side view showing still another transmission type sabo dam according to the present invention. FIG.
[0016]
In FIG. 1 to FIG. 15, 1 is foundation concrete, and 6 is a steel pipe column material fixed on the foundation concrete 1. In addition, 6A shows an upstream column material. Reference numeral 7 denotes a steel pipe beam member fixed between the column members 6. The beam member 7 is composed of a horizontal beam member 7A, an inclined beam member 7B, and a connecting beam member 7C each formed of a steel pipe. Reference numeral 8 denotes a steel box-shaped connecting element for connecting the column member 6 and the beam member 7 to each other, and concrete 9 is filled therein. Reference numeral 8A denotes an upstream coupling element. The coupling element 8 is composed of a polyhedral box-shaped member, and coupling ends of the column member 6 and the beam member 7 are coupled to each surface of the box-shaped member as follows.
[0017]
Note that the column member 6 and the beam member 7 (the horizontal beam member 7A, the inclined beam member 7B, and the connecting beam member 7C) may be a section steel such as an H-section steel in addition to a steel pipe having a circular cross section or a square cross section.
[0018]
The connecting end portions of the column member 6 and the beam member 7 are embedded in the concrete 9 through the wall surface of the box-shaped connecting element 8, and the axis (l) of each of the column member 6 and the beam member 7 is shown in FIG. 1 and FIG. 2, it is concentrated at one point (O) in the coupling element 8. In addition, if the steel plate 10 is fixed to the end part outer surface of the column member 6 and the beam member 7, the frame can be easily constructed.
[0019]
In this way, by concentrating the axis (l) of each of the column member 6 and the beam member 7 at one point (O) in the box-like coupling element 8, the transmission of force is clear and concise, and thus Reasonable and economical dam design is possible. In addition, by not using the flange connection for the connection between the connecting element 8 and the column member 6 and the beam member 7, it is easy to manufacture the frame and to install it by the actual product.
[0020]
As shown in FIG. 1, the coupling element 8 at the top may have a structure in which the shaft cores do not necessarily coincide with each other for economic reasons. Of course, the axes may be matched as indicated by the two-dot chain line in the figure.
[0021]
As shown in FIG. 3, the coupling element 8 includes a flange material 11 made of a steel plate, a web material 12 and a reinforcing material 13, and the coupling element 8, the column material 6, and the beam material 7 are flange-coupled. good.
[0022]
Reference numeral 14 denotes a buffering means detachably attached to the front surface of the column member 6A on the upstream side of the dam main body by a bolt 16 via a bracket 15. When boulders collide with the buffering means 14, the buffering means 14 is recessed and deformed. Thereby, collision energy is absorbed and plastic deformation of the dam body is prevented or reduced.
[0023]
The buffer means 14 is composed of a cylindrical steel pipe as shown in FIG. 4 or a semi-cylindrical steel pipe as shown in FIG. 5, but may be a square tubular steel pipe or the like other than this shape. . Moreover, the thing of a division structure may be used. That is, the horizontal cross-sectional shape may be a closed cross-section. In addition, this includes the case where it is attached to the column member 6A and, as a result, combined to form a closed cross section. As shown in FIG. 6, a plurality of buffer means 14 may be attached to one column member 6 </ b> A. Moreover, as shown in FIG. 7, you may attach the buffer means 14 to 6 A of pillar materials through elastic buffer materials 17, such as rubber | gum. In this case, the elastic cushioning material 17 is sandwiched between the brackets 15.
[0024]
Further, in addition to attaching the buffering means 14 to the column member 6A as described above, the buffering means 14 may be detachably attached to the upstream coupling element 8A via a bracket 15 with a bolt 16 as shown in FIGS. good. When the buffer means 14 is attached to the coupling element 8A, the transmission and dispersion of the collision energy are performed more smoothly. Also in this case, as shown in FIGS. 10 and 11, an elastic cushioning material 17 such as rubber may be sandwiched between the bracket 15 and the coupling element 8A.
[0025]
Further, the buffer means 14 may be divided into a plurality of pieces as shown in FIG. Dividing the buffer means 14 into a plurality of pieces has the following advantages. That is, if the buffer means 14 is single, even if the buffer means 14 is partially damaged, it is necessary to replace one buffer means with a completely new one. If it is divided, it is possible to replace only the shock absorbing means, which is economical.
[0026]
The above is a lattice-type steel sabo dam in which the shock absorbers 14 are attached to the dam body having a structure in which the axial centers of the column member 6 and the beam member 7 are concentrated at one point in the coupling element 8, as shown in FIG. Further, the buffer means 14 may be attached to the conventional lattice-type steel sabo dam body of FIG. 16 in which the axis cores of the column member 6 and the beam member 7 are not concentrated at one point. Further, as shown in FIG. 14, the buffer means 14 may be attached to the slit-type steel sabo dam body of FIG. 17, and further, as shown in FIG. 15, the buffer means 14 is provided to the slit-type concrete sabo dam body. It may be attached.
[0027]
In any case, when a boulder collides with the buffer means 14, the buffer means 14 is recessed and deformed. Thereby, collision energy is absorbed and plastic deformation of the dam body is prevented or reduced. The damaged buffer means 14 can be easily replaced with a new one by loosening the bolt 16.
[0028]
【The invention's effect】
As described above, according to the present invention, the buffer means for absorbing the collision energy of the boulder during flooding is detachably attached to the upstream surface of the dam body with respect to the dam body, so that the boulder during flooding The impact energy received by the dam body due to the collision of the dam body is buffered by the buffer means, and the external force received by the dam body is reduced, thus making it possible to economically design the dam body and easily replace the damaged buffer means. Useful effects are brought about.
[Brief description of the drawings]
FIG. 1 is a side view showing a transmission type sabo dam according to the present invention.
FIG. 2 is a front view of the transmission sabo dam shown in FIG. 1 as viewed from the upstream side.
FIG. 3 is a cross-sectional view showing another coupling element of the transmission type sabo dam according to the present invention.
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a cross-sectional view showing another buffering means.
FIG. 6 is a cross-sectional view showing still another buffering means.
FIG. 7 is a cross-sectional view showing a buffer means fixed to a column member by another method.
FIG. 8 is a cross-sectional view showing the buffer means fixed to the coupling element.
FIG. 9 is a partial side view showing the buffer means fixed to the coupling element.
FIG. 10 is a cross-sectional view showing the buffer means fixed to the coupling element by another method.
FIG. 11 is a partial side view showing the buffer means fixed to the coupling element by another method.
FIG. 12 is a partial side view showing a transmission type sabo dam according to the present invention provided with divided buffer means.
FIG. 13 is a side view showing another transmission type sabo dam according to the present invention.
FIG. 14 is a perspective view showing still another transmission type sabo dam according to the present invention.
FIG. 15 is a side view showing still another transmission type sabo dam according to the present invention.
FIG. 16 is a perspective view showing a lattice-type steel sabo dam.
FIG. 17 is a perspective view showing a slit-type steel sabo dam.
FIG. 18 is a perspective view showing a slit-type concrete sabo dam.
[Explanation of symbols]
1: Foundation concrete 2: Column material 3: Beam material 4: Diagonal material 5: Connecting beam material 6: Column material 6A: Upstream beam material 7: Beam material 7A: Horizontal beam material 7B: Inclined beam material 7C: Connecting beam material 8: Joining element 8A: Upstream joining element 9: Concrete 10: Steel plate 11: Flange material 12: Web material 13: Reinforcement material 14: Buffering means 15: Bracket 16: Bolt 17: Elastic cushioning material

Claims (7)

洪水時の巨礫の衝突エネルギーを吸収するための緩衝手段がダム本体の上流面に、前記ダム本体に対してブラケットを介して着脱自在に取り付けられ、前記ブラケットは、前記緩衝手段の下流面側に面して取り付けられ、上流面側には露出しておらず、前記緩衝手段は、縦方向に複数本に分割されていることを特徴とする透過型砂防ダム。A buffer means for absorbing the energy of impact of boulders during flooding is detachably attached to the upstream surface of the dam body via a bracket with respect to the dam body, and the bracket is attached to the downstream surface side of the buffer means. A transmission type sabo dam, which is attached facing and is not exposed on the upstream side, and the buffer means is divided into a plurality of pieces in the vertical direction . 洪水時の巨礫の衝突エネルギーを吸収するための緩衝手段がダム本体の上流面に、前記ダム本体に対してブラケットを介して着脱自在に取り付けられ、前記ブラケットは、前記緩衝手段の下流面側に面して取り付けられ、上流面側には露出しておらず、前記ブラケットは、弾性緩衝材を介して前記ダム本体に取り付けられていることを特徴とする透過型砂防ダム。 A buffer means for absorbing the energy of impact of boulders during flooding is detachably attached to the upstream surface of the dam body via a bracket with respect to the dam body, and the bracket is attached to the downstream surface side of the buffer means. A transmission type sabo dam characterized by being attached to face and not exposed to the upstream side, and wherein the bracket is attached to the dam body via an elastic cushioning material . 前記緩衝手段は、複数本に分割されていることを特徴とする、請求項2記載の透過型砂防ダム。 The transmission type sabo dam according to claim 2, wherein the buffer means is divided into a plurality of pieces . 前記ダム本体は、基礎コンクリート上または地盤上に固定された鋼製支柱と、前記支柱間に固定された鋼製梁材とからなることを特徴とする、請求項1から3のうちの何れか1つに記載の透過型砂防ダム。 The said dam main body consists of the steel support | pillar fixed on the foundation concrete or the ground, and the steel beam material fixed between the said support | pillars, The any one of Claim 1 to 3 characterized by the above-mentioned. The transmission type sabo dam according to one. 前記緩衝手段は、その水平断面形状が閉断面である部材からなっていることを特徴とする、請求項1から4のうちの何れか1つに記載の透過型砂防ダム。 The transmission type sabo dam according to any one of claims 1 to 4, wherein the buffer means comprises a member whose horizontal cross-sectional shape is a closed cross-section . 前記緩衝手段は、円筒状鋼管からなっていることを特徴とする、請求項1から5のうちの何れか1つに記載された透過型砂防ダム。 The transmission type sabo dam according to any one of claims 1 to 5, wherein the buffer means comprises a cylindrical steel pipe . 前記緩衝手段は、半円筒状鋼管からなっていることを特徴とする、請求項1から6のうちの何れか1つに記載された透過型砂防ダム。 The transmission type sabo dam according to any one of claims 1 to 6, wherein the buffer means is made of a semi-cylindrical steel pipe .
JP2001334137A 1998-03-19 2001-10-31 Transmission type sabo dam Expired - Lifetime JP3946028B2 (en)

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JP7075398 1998-03-19
JP2001334137A JP3946028B2 (en) 1998-03-19 2001-10-31 Transmission type sabo dam

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JP4680072B2 (en) * 2006-01-19 2011-05-11 Jfe建材株式会社 Transmission type sabo dam
JP5722550B2 (en) * 2010-04-19 2015-05-20 シバタ工業株式会社 Reinforced structure of transmission type sabo dam
JP2013130002A (en) * 2011-12-21 2013-07-04 Kobe Steel Ltd Metallic transmission type sand control dam
KR101390171B1 (en) 2012-02-15 2014-04-29 한국지질자원연구원 debris barrier using strain gauge, maintenance managing system of debris barrier using strain gauge and maintenance managing method using this system

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