JP2006348566A - Underwater installation method for laterally long bag filled with earth and sand, etc. , the laterally long bag, and hanging apparatus therefor - Google Patents

Underwater installation method for laterally long bag filled with earth and sand, etc. , the laterally long bag, and hanging apparatus therefor Download PDF

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JP2006348566A
JP2006348566A JP2005175339A JP2005175339A JP2006348566A JP 2006348566 A JP2006348566 A JP 2006348566A JP 2005175339 A JP2005175339 A JP 2005175339A JP 2005175339 A JP2005175339 A JP 2005175339A JP 2006348566 A JP2006348566 A JP 2006348566A
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horizontally long
long bag
bag body
sand
earth
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JP4710045B2 (en
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Yasuyuki Kosaka
康之 小坂
Katsuhiko Yamada
克彦 山田
Nobuo Tsunoda
述郎 角田
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DAIYATEKKU KK
Kaiwa Tec Ltd
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DAIYATEKKU KK
Kaiwa Tec Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater installation method for a laterally long bag filled with earth and sand, etc., the laterally long bag, and a hanging apparatus therefor. <P>SOLUTION: According to the floating/sinking type hanging apparatus 2, floats 6 capable of storing air are attached to the laterally long bag 1 filled with earth and sand, etc., and air is supplied to the floats 6 to set the hanging apparatus 2 afloat, where the laterally long bag 1 is hung to keep the whole length of the bag 1 at a depth level near the water surface. From this state, the hanging apparatus 2 is moved to the water surface above a construction site of an underwater structure, and then air is discharged from the floats 6 to sink the hanging apparatus 2 to let the bag 1 land on the construction site. Afterward, the bag 1 is separated from the hanging apparatus 2, and then the floats 6 are supplied with air to float the hanging apparatus 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、海・河川・湖・港湾等の水底に設置する、潜堤や洗掘防止用の水底地盤等の水中構造物を構築するのに用いる土砂等を充填した横長袋体の沈設方法とその横長袋体および土砂等を充填した横長袋体の吊下装置とに関するものである。   The present invention relates to a method for laying a horizontally long bag body filled with earth and sand used for constructing an underwater structure such as a submerged dike or a scouring bottom ground to be installed on the bottom of a sea, river, lake, harbor, etc. And a hanging device for a horizontally long bag filled with the horizontally long bag and earth and sand.

従来、沿岸付近・河口部・沖合い・港内等の水底に設置される、人工リーフ等を含む潜堤、漁礁、海藻礁、洗掘防止用の水底地盤等の水中構造物を、土砂や浚渫土などを充填した横長袋体を水中に沈下させ水底に積み上げたり、水底に敷き詰めたりすることによって構築する場合がある。   Conventionally, underwater structures such as submerged dikes including artificial reefs, fishing reefs, seaweed reefs, and submarine grounds to prevent scouring that are installed near the coast, estuaries, offshores, harbors, etc. There are cases in which a horizontally long bag filled with such as is submerged in water and stacked on the bottom of the water or spread on the bottom of the water.

このような横長袋体の沈設方法は、例えば、水中構造物を設置する水域に係留した台船上で空の横長袋体に土砂等を充填し、この横長袋体を台船上に設置したクレーンで水中に投下して沈める方法(パックレイ工法とも呼ばれる)や、船底が開閉可能になっている底開式土運船を浚渫船に横付けした状態で係留し、船倉内に配置している空の横長袋体に、浚渫船で採取した浚渫土を供給して浚渫土を横長袋体に充填したのち、底開式土運船を水中構造物を設置する水域まで移動させて船底を開き横長袋体を水中に投下する方法がある(ジオコンテナー工法とも呼ばれる)。
特開平6−43688公報(第2〜3頁)
Such a horizontal bag is set by, for example, a crane in which an empty horizontal bag is filled with earth and sand on a trolley moored in the water area where the underwater structure is installed, and the horizontal sack is installed on the trolley. A horizontally long method of mooring with a method of dropping and submerging in water (also known as the Pac-lay method) or a bottom-opening earth-moving vessel with a bottom that can be opened and closed, placed in a chartered ship and placed in the hold After supplying the dredged material collected from the dredger to the bag body and filling the dredged soil into the horizontally long bag body, move the bottom-opening type ship to the water area where the underwater structure is installed, open the bottom of the ship and open the oblong bag body. There is a method of dropping in water (also called geocontainer method).
JP-A-6-43688 (pages 2 and 3)

しかしながら、パックレイ工法は横長袋体の大きさの割りには大型の作業船団が必要なため、作業効率が悪い。一方、ジオコンテナー工法は横長袋体を大型化することで、水中構造物を効率良く構築できるようになり建設コストの減縮を図れるメリットがあるものの、水中投下時の管理が困難であり、且つ、横長袋体が水中を自由落下するため水深が深い場合には、沈設精度が悪くなり沈設状態が一定しないというデメリットがある。   However, the Pac Lay method requires a large work fleet to divide the size of the horizontally long bag, so that the work efficiency is poor. On the other hand, the geocontainer construction method has the merit that the construction of underwater structures can be efficiently constructed by increasing the size of the horizontally long bag body, but the construction cost can be reduced, but the management at the time of underwater dropping is difficult, and Since the horizontally long bag body freely falls in water, when the water depth is deep, there is a demerit that the setting accuracy is deteriorated and the setting state is not constant.

また、水中構造物を設置する水域の水深が浅い場合や、設置する水域に水深の浅いところがある場合には、台船や底開式土運船の船体が浅瀬に乗り上げ座礁するおそれがあるため、潮位が上昇する満潮時を見計らって作業をしなければならない。したがって、潮位が上昇している短時間の間でしか作業を行うことができず作業効率が非常に悪い。   Also, if the water area where the underwater structure is installed is shallow, or if the water area where the water structure is installed is shallow, there is a risk that the hull of a trolley or open-bottomed earth-moving ship will ride on the shallows and run aground. The work must be done in anticipation of the high tide when the tide level rises. Therefore, the work can be performed only in a short time when the tide level is rising, and the work efficiency is very poor.

そこで本発明は、このような問題点を解決するため、水深の浅い水域や浅瀬のある水域において効率的に作業を行うことができる、土砂等を充填した横長袋体の沈設方法とその横長袋体および横長袋体の吊下装置を提供することを目的としている。   Therefore, in order to solve such problems, the present invention can efficiently work in a shallow water area or a shallow water area, and a method for laying a horizontally long bag body filled with earth and sand and the horizontally long bag. An object of the present invention is to provide a suspension device for a body and a horizontally long bag.

上記の課題を解決するため請求項1記載の土砂等を充填した横長袋体の沈設方法は、水底に沈下させ潜堤や洗掘防止用の水底地盤等の水中構造物を構築するための、土砂等を充填した横長袋体の沈設方法であって、土砂等を充填した前記横長袋体を、内部に空気を収納可能なフロートに空気を供給し水面に浮かべている浮沈式の吊下装置に、袋体全長が水面付近の深さに位置するようにして吊り下げ、この状態で前記吊下装置を、前記水中構造物の構築場所の上方に位置する水面に移動させ、それから前記フロートの空気を排出して前記吊下装置を沈下させ、前記横長袋体を着底させるか或いは着底場所に接近させたのち、前記横長袋体を前記吊下装置から切り離し、その後前記フロートに空気を供給し前記吊
下装置を浮上させることを特徴としている。
In order to solve the above problems, the method for sinking a horizontally long bag filled with earth and sand according to claim 1 is for sinking to the bottom of the water and constructing an underwater structure such as a submerged dike or a bottom of the scouring ground. A method of sinking a horizontally long bag filled with earth and sand, wherein the horizontally elongated bag filled with earth and sand is floated on the water surface by supplying air to a float that can store air therein In this state, the suspension device is moved to the water surface located above the construction site of the underwater structure, and then the float of the float is suspended. After the air is discharged and the suspension device is sunk to allow the horizontally long bag body to bottom or close to the bottoming position, the horizontally long bag body is separated from the suspension device, and then air is supplied to the float. Supplying and lifting the suspension device It is.

請求項1記載の土砂等を充填した横長袋体の沈設方法によれば、前記横長袋体を袋体全長が水面付近の水深の浅いところに位置した状態を保ったままで、前記水中構造物の構築場所の上方に位置する水面まで運搬することができるため、作業台船や底開式土運船等が進入できない水深の浅い水域において効率良く沈設作業を行なうことができる。しかも、前記吊下装置を水中に沈下させて沈設作業を行うため前記横長袋体の位置合わせが容易で、より効率的に沈設作業を行なえる。   According to the settling method of the horizontally long bag body filled with earth and sand according to claim 1, the horizontally long bag body is maintained in a state where the bag body is located in a shallow water depth near the water surface, Since it can be transported to the water surface located above the construction site, it is possible to efficiently perform the laying work in a shallow water area where a work table ship, a bottom open type ship carrier, etc. cannot enter. Moreover, since the suspending device is submerged in water to perform the laying operation, the horizontal bag body can be easily aligned, and the laying operation can be performed more efficiently.

なお、前記横長袋体は設置場所の環境や使用目的等に応じ、ポリエステル系、ポリエチレン系、ポリプロピレン系、ナイロン系、植物繊維系などの織布や不織布、または、ナイロン系やポリエステル系などの繊維で製造したネットを用いて形成することができる。   The horizontally long bag body may be a woven or non-woven fabric such as polyester, polyethylene, polypropylene, nylon, or vegetable fiber, or a fiber such as nylon or polyester, depending on the environment or purpose of use. It can be formed using a net manufactured in

例えば、海藻礁として利用する場合には、海藻や海藻の種子が定着しやすいように不織布を用いて形成すれば良く、土砂を充填する場合には、帆布等の強靭なポリエチレン系織布で形成することによって波浪等による損傷を抑えることができ、さらに、内面に不織布を張り合わせて二層構造にすれば微細な土砂の吸い出しが抑制され、土砂漏れによる環境悪化を防止することができる。そして、骨材等の比較的塊の大きなものを充填して使用する場合には、前記横長袋体をネットで形成することもできる。これら以外に、種類が異なる材料を組み合わせ多層構造となるようにして形成することもできる。   For example, when used as a seaweed reef, it may be formed using a non-woven fabric so that seaweed and seaweed seeds are easily settled. When filling with earth and sand, it is formed with a strong polyethylene woven fabric such as canvas. By doing so, damage due to waves and the like can be suppressed, and furthermore, if a non-woven fabric is laminated on the inner surface to form a two-layer structure, suction of fine earth and sand can be suppressed, and environmental deterioration due to earth and sand leakage can be prevented. And when filling and using a comparatively big lump, such as an aggregate, the said horizontally long bag body can also be formed with a net | network. In addition to these, different types of materials can be combined to form a multilayer structure.

なお、土砂等としているのは、骨材やセメント混合物、コンクリートガラや浚渫土砂等の産業廃棄物なども用いることができるためである。   The reason for the use of earth and sand is that aggregates, cement mixtures, industrial wastes such as concrete glass and dredged earth and sand can also be used.

請求項2記載の土砂等を充填した横長袋体の沈設方法は、水底に沈下させ潜堤や洗掘防止用の水底地盤等の水中構造物を構築するために用いられる土砂等を充填した横長袋体の沈設方法であって、土砂等を充填した前記横長袋体を、内部に浮力体を収納したフロートを取り付け水面に浮上させている吊下装置に、袋体全長が水面付近の深さに位置するようにして吊り下げ、この状態で前記吊下装置を、前記水中構造物の構築場所の上方に位置する水面に移動させたのち、前記横長袋体を前記吊下装置から切り離すことによって沈下させて着底させることを特徴としている。   The method for sinking a horizontally long bag body filled with earth and sand according to claim 2 is a horizontally long bag filled with earth and sand used to construct an underwater structure such as a submerged dike and a bottom of the scour to prevent scouring. A method for sinking a bag body, wherein the bag body is filled with a float containing a buoyant body and is suspended to a water surface. In this state, the suspension device is moved to the water surface located above the construction site of the underwater structure, and then the horizontally long bag body is separated from the suspension device. It is characterized by sinking and bottoming.

請求項2記載の土砂等を充填した横長袋体の沈設方法によれば、上記請求項1の作用と同様、前記横長袋体を袋体全長が水面付近の水深の浅いところに位置した状態を保ったままで、前記水中構造物の構築場所の上方に位置する水面まで運搬することができるため、作業台船や底開式土運船等が進入できない水深の浅い水域において効率良く沈設作業を行なうことができる。   According to the settling method of the horizontally long bag body filled with earth and sand according to claim 2, the state in which the horizontally long bag body is located at a shallow water depth near the water surface is the same as the operation of claim 1 above. Since it can be transported to the water surface located above the construction site of the underwater structure, it can be efficiently installed in shallow water areas where work platform boats and open-bottomed ship carriers cannot enter. be able to.

請求項3記載の土砂等を充填した横長袋体の沈設方法は、土砂等を充填した横長袋体が吊下げられている複数台の吊下装置を一列に連結し、一方の端の前記吊下装置に残りの前記吊下装置を牽引させるようにして水中構造物の構築場所の上方に位置する水面に移動させたのち、前記各吊下装置の前記横長袋体を順次沈設することを特徴としている。   The method for sinking a horizontally long bag body filled with earth and sand according to claim 3 connects a plurality of suspension devices on which the horizontally long bag body filled with earth and sand is suspended in a row, and the suspension at one end is suspended. After moving the remaining suspension device to the lower surface and moving it to the water surface located above the construction site of the underwater structure, the horizontally long bags of the respective suspension devices are sequentially laid down. It is said.

請求項3記載の土砂等を充填した横長袋体の沈設方法によれば、一度に複数本の前記横長袋体を運搬することができるため、沈設作業の効率化を図ることができる。   According to the settling method for the horizontally long bag body filled with earth and sand according to claim 3, a plurality of the horizontally long bag bodies can be transported at a time, so that the efficiency of the sinking work can be improved.

請求項4記載の土砂等を充填した横長袋体の沈設方法は、横長袋体の切り離しを、船上または陸上から遠隔操作によって行なうことを特徴としている。こうすると、前記横長袋体を人手を使わずに前記吊下装置から切り離すことができるようになるため、能率が良く、且つ、安全に作業が行なえるようになる。   According to a fourth aspect of the present invention, there is provided a method for sinking a horizontally long bag body filled with earth and sand or the like, wherein the horizontally long bag body is separated from a ship or land by remote control. If it carries out like this, since it becomes possible to isolate | separate the said horizontal elongate bag body from the said suspension apparatus, without using a hand, it becomes efficient and can work now safely.

請求項5記載の土砂等を充填した横長袋体の沈設方法は、水面に浮上させている吊下装置に空の横長袋体を吊下げ、それから前記横長袋体に土砂等を充填することを特徴としている。   The method for sinking a horizontally long bag body filled with earth and sand according to claim 5 is to suspend an empty horizontally long bag body from a suspension device levitated on the water surface, and then to fill the horizontally long bag body with earth and sand. It is a feature.

請求項5記載の土砂等を充填した横長袋体の沈設方法によれば、前記横長袋体を容易に前記吊下装置に吊り下げることができ、前記横長袋体に浮力が作用することによって、前記横長袋体への土砂等の充填作業がしやすくなる。   According to the settling method of the horizontally long bag body filled with earth and sand according to claim 5, the horizontally long bag body can be easily suspended from the suspension device, and buoyancy acts on the horizontally long bag body, It becomes easy to fill the horizontally long bag body with earth and sand.

請求項6記載の横長袋体は、前記請求項1〜5のいずれか1項の土砂等を充填した横長袋体の沈設方法に記載されている前記横長袋体に、その外周面に底部を経由させた状態で取り付けられ長手方向から見てU字状になっている吊ベルトを設け、同吊ベルトを前記横長袋体の長手方向に所定間隔毎に配設し、前記各吊ベルトの両端部に、前記吊下装置に配置した連結具への取付部をそれぞれ設けることを特徴としている。   The laterally long bag body according to claim 6 is provided with a bottom portion on the outer peripheral surface thereof, the laterally long bag body described in the method for laying a laterally long bag body filled with earth and sand according to any one of claims 1 to 5. A suspension belt attached in a routed state and having a U-shape when viewed from the longitudinal direction is provided, and the suspension belt is disposed at predetermined intervals in the longitudinal direction of the horizontally long bag body, and both ends of each suspension belt Each part is provided with an attachment part to a connector arranged in the suspension device.

請求項6記載の横長袋体によれば、土砂等を充填した前記横長袋体を前記吊下装置に吊下げた際に、前記横長袋体の垂れ下がりを抑えることができるため運搬し易くなる。   According to the horizontally long bag body according to claim 6, when the horizontally long bag body filled with earth and sand is suspended from the suspension device, it is possible to suppress the droop of the horizontally long bag body, so that it is easy to carry.

請求項7記載の横長袋体は、吊ベルトが、横長袋体を側方から見て、取付部の真下よりも前記横長袋体の中央部寄りにずれた位置の前記底部を経由させることを特徴にしている。こうすると、充填した土砂等が前記横長袋体の中間部に寄り集まるため、前記横長袋体の長さが縮まり前記横長袋体の形状を保持し易くなる。したがって、前記吊下装置に吊り下げた前記横長袋体が運搬し易くなる。   The laterally long bag body according to claim 7 is configured such that the suspension belt passes through the bottom portion at a position shifted toward the center of the laterally long bag body from directly below the attachment portion when the laterally long bag body is viewed from the side. It has a feature. If it carries out like this, since the filled earth and sand etc. will gather near the intermediate part of the said horizontally long bag body, the length of the said horizontally long bag body will shrink and it will become easy to hold | maintain the shape of the said horizontally long bag body. Therefore, it becomes easy to carry the horizontally long bag suspended from the suspension device.

請求項8記載の横長袋体は、前記吊ベルトを、前記横長袋体を側方から見て、前記底部に向かって前記横長袋体の長手方向に開いた二股形状にすることを特徴にしている。こうすると、土砂等を充填した際の前記横長袋体の膨らみがより抑えられ運搬し易くなる。   The laterally long bag body according to claim 8 is characterized in that the suspension belt has a bifurcated shape that opens in the longitudinal direction of the laterally long bag body toward the bottom portion when the laterally long bag body is viewed from the side. Yes. If it carries out like this, the swelling of the said laterally long bag body at the time of filling with earth and sand etc. will be suppressed more, and it will become easy to convey.

請求項9記載の土砂等を充填した横長袋体の吊下装置は、水底に沈下させ潜堤や洗掘防止用の水底地盤等の水中構造物を構築するために用いられる、土砂等を充填した横長袋体を沈設するための装置であって、少なくとも前記横長袋体の長さと同程度の全長を有する装置本体に、浮力体を内部に収納可能なフロートを設けるとともに、前記横長袋体を前記装置本体の全長方向と、略平行状態で吊下げ可能な吊下支持部が全長方向に沿って所定の間隔で配設し、前記フロートを、吊下げられた前記横長袋体が水面付近の深さに位置するように、前記装置本体を浮かせることが可能な浮力を付与することを特徴としている。   The suspension device for horizontally long bags filled with earth and sand according to claim 9 is filled with earth and sand, which is used to construct an underwater structure such as a submerged levee and scouring prevention ground by sinking to the bottom of the water. An apparatus for sinking the horizontally long bag body, wherein a float capable of accommodating a buoyant body is provided in an apparatus main body having at least the same length as the length of the horizontally long bag body, and the horizontally long bag body is Suspension support portions that can be suspended in a substantially parallel state with the entire length direction of the apparatus main body are disposed at predetermined intervals along the entire length direction, and the suspended lateral bag body is located near the water surface. A buoyancy capable of floating the apparatus main body is imparted so as to be located at a depth.

請求項9記載の土砂等を充填した横長袋体の吊下装置によれば、前記横長袋体をその全長が水面付近の深さに位置した状態で吊り下げた状態にすることができるため、前記横長袋体を水深の浅い水域に運搬し沈設することが可能になる。   According to the hanging device for the horizontally long bag body filled with earth and sand according to claim 9, the horizontally long bag body can be suspended in a state where the entire length is located at a depth near the water surface. The horizontally long bag can be transported and set in a shallow water area.

請求項10記載の土砂等を充填した横長袋体の吊下装置は、浮力体を空気とし用い、前記フロートに空気を出し入れ可能にすることを特徴としている。請求項10記載の土砂等を充填した横長袋体の吊下装置によれば、請求項9に記載している作用の他、前記吊下装置を水中に沈下させて前記横長袋体を着底させることがでるため、前記横長袋体の位置合わせが容易になるし、前記横長袋体を降ろした位置が規定の位置からズレた場合には、前記フロートに給気して前記吊下装置を浮上させ、再び前記横長袋体を吊り上げることで位置合わせを行なうこともできる。   The hanging device for horizontally long bags filled with earth and sand according to claim 10 is characterized in that the buoyancy body is used as air and the air can be taken in and out of the float. According to the hanging device for a horizontally long bag filled with earth and sand according to claim 10, in addition to the operation described in claim 9, the hanging device is submerged in water so that the horizontally long bag is grounded. Therefore, when the position of the horizontally long bag body is shifted from the specified position, the float device is supplied with air to the float. Positioning can also be performed by levitating and lifting the horizontally long bag body again.

また、作業水域の気象条件の急変により強風や高波等で曳航作業、或いは、沈設作業の中断を余儀なくされた場合には、前記吊下装置を、前記横長袋体を取り付けた状態のまま
設置場所付近の水底に沈めて仮置きしておけるため、工事再開後、直に作業に取り掛かることができるので作業の効率化が図れる。さらに、前記フロートから空気を排出し前記吊下装置を潜航させることもできるため、波が高い気象条件下でも前記横長袋体を安全に運搬することができる。
In addition, if the towing work or the sinking work is forced to be interrupted by strong winds or high waves due to sudden changes in the weather conditions in the working water area, the suspension device should be installed with the horizontally long bag attached. Since it can be placed in a nearby water bottom and temporarily placed, work can be started immediately after the work resumes, so work efficiency can be improved. Furthermore, since the air can be discharged from the float and the suspension device can be submerged, the horizontally long bag can be safely transported even under weather conditions with high waves.

それから、前記フロートの空気量を調節して前記吊下装置の沈下速度をコントロールすることができるので、例えば、ダム湖の湖底に前記横長袋体を設置する場合、前記横長袋体をゆっくりと着底させることで堆積土の巻き上げを抑え貯留水の濁りを抑えることができる。   Then, since the sinking speed of the suspension device can be controlled by adjusting the air amount of the float, for example, when installing the horizontally long bag on the bottom of a dam lake, the horizontally long bag is slowly worn. By making it bottom, it is possible to suppress the rolling up of the sediment and suppress the turbidity of the stored water.

上述のような手段をもって為される本発明の土砂等を充填した横長袋体の沈設方法および横長袋体の吊下装置によれば、水深の浅い水域や浅瀬がある水域に水中構造物を構築する場合、潮位に関係なく横長袋体の沈設作業を行なえるため、工期を短縮することができ、工事費も抑えることができる。さらに、吊下装置を浮沈式にすることで横長袋体を沈設する場所の位置決めが容易になるため作業がはかどり、工期短縮を促進することができる。また、横長袋体と吊下装置とを遠隔操作で切り離し可能にすれば、人手を省き作業能率を上げることができる。そして、空の横長袋体を吊下装置に吊下げたあとに土砂等を充填すれば、横長袋体の吊下げ作業や土砂等の充填作業が容易になり作業の効率化を図れる。   According to the method for laying a horizontally long bag body filled with earth and sand of the present invention and the suspension device for a horizontally long bag body constructed as described above, an underwater structure is constructed in a shallow water area or a shallow water area. In this case, the construction work of the horizontally long bag can be performed regardless of the tide level, so the construction period can be shortened and the construction cost can be reduced. Furthermore, since the position of the place where the horizontally long bag body is laid down can be easily determined by making the suspension device up and down, the work can be accelerated and the construction period can be shortened. Further, if the horizontally long bag body and the suspension device can be separated by remote control, manpower can be saved and work efficiency can be increased. If earth and sand or the like are filled after the empty horizontally long bag body is suspended from the suspension device, the suspension work of the horizontally long bag body or the filling operation of earth and sand becomes easy, and the work efficiency can be improved.

以下に、本発明にかかる土砂等を充填した横長袋体の沈設方法と横長袋体の吊下装置との実施形態について、図面1〜13を参照しつつ説明する。   DESCRIPTION OF EMBODIMENTS Embodiments of a method for sinking a horizontally long bag body filled with earth and sand according to the present invention and a device for hanging a horizontally long bag body will be described below with reference to FIGS.

図1(a)(b)に示すように、横長袋体1はポリエステル系織布を用いて断面円形の細長い筒状に形成されたもので、長手方向の両側にはそれぞれ土砂等を充填するための円筒形の投入口1aが、周方向で同じ位置になるように設けられている。この投入口1aは横長袋体1の外周面に設けられた収納部1dに出し入れ可能になっており、折り畳んで収納部1dに収め、収納部1dの口をロープで締め上げることによって閉じれる仕組みになっている。また、投入口1aが設けられている方とは反対側の外周面には、長手方向における両端と中間部の二箇所にほぼ一定間隔で、周方向に沿って縫着された吊ベルト1bが設けられており、その両端には端部を折り返し縫製した環状部に取付リング(取付部)1cがそれぞれ取り付けられている。   As shown in FIGS. 1 (a) and 1 (b), the horizontally long bag body 1 is formed in a long and narrow cylindrical shape with a circular cross section using a polyester woven fabric, and both sides in the longitudinal direction are filled with earth and sand. For this purpose, a cylindrical insertion port 1a is provided at the same position in the circumferential direction. The insertion port 1a can be taken in and out of a storage portion 1d provided on the outer peripheral surface of the horizontally long bag body 1, and is folded and stored in the storage portion 1d, and is closed by tightening the mouth of the storage portion 1d with a rope. It has become. In addition, a suspension belt 1b sewn along the circumferential direction at substantially constant intervals is provided on the outer peripheral surface opposite to the side where the insertion port 1a is provided at two positions, both ends in the longitudinal direction and the intermediate portion. The attachment ring (attachment part) 1c is attached to the annular part which the end part turned up and sewed at both ends, respectively.

そして、図2(a)(b)に示すように、吊下装置2は二本の長尺の鋼管3を、間隔をあけて平行に並べて配置し、端部どうしを短い鋼管4でそれぞれ連結することで形成されたフレーム5を備えている。このフレーム5は、鋼管内部の気密性が保たれた状態になっているため、鋼管に封入された空気を浮力体として水面に浮くことができる。   Then, as shown in FIGS. 2 (a) and 2 (b), the suspension device 2 has two long steel pipes 3 arranged in parallel at intervals, and the ends are connected by a short steel pipe 4 respectively. The frame 5 formed by doing so is provided. Since this frame 5 is in a state in which the airtightness inside the steel pipe is maintained, air enclosed in the steel pipe can float on the water surface as a buoyant body.

このフレーム5には、各長尺の鋼管3に沿って円筒型のゴムフロート6がそれぞれ配設されている。各ゴムフロート6はそれぞれ、長尺の鋼管3と同程度の長さを有し、内部に空気を出し入れ可能になっていて、外周面の長手方向に沿って吊設した横長の帯状部6aで長尺の鋼管3にそれぞれ取り付けられている。   The frame 5 is provided with a cylindrical rubber float 6 along each long steel pipe 3. Each of the rubber floats 6 has a length similar to that of the long steel pipe 3 and is capable of taking air into and out of it, and is a horizontally long belt-like portion 6a suspended along the longitudinal direction of the outer peripheral surface. Each is attached to a long steel pipe 3.

長尺の鋼管3の上部外周面にはそれぞれ、一対の横長の板状部材を長手方向に沿った状態で隙間をあけて並べた連結部3aがそれぞれ設けられており、各ゴムフロート6の帯状部6aを挟み込んだ状態でボルトにより締結されている。   The upper outer peripheral surface of the long steel pipe 3 is provided with a connecting portion 3a in which a pair of horizontally long plate-like members are arranged with a gap in a state along the longitudinal direction. It is fastened by bolts with the portion 6a sandwiched therebetween.

また、各長尺の各鋼管3の互いに対向する面にはそれぞれ、横長袋体1を吊り下げるた
めの吊下支持部7が、長尺の鋼管3の長手方向に所定間隔ごとに配設されており、各長尺の鋼管3の吊下支持部7は互いに相対するように配置されていて、横長袋体1の取付リング1cとほぼ対応する位置にある。
In addition, suspension support portions 7 for suspending the horizontally long bag body 1 are arranged at predetermined intervals in the longitudinal direction of the long steel pipe 3 on the surfaces of the long steel pipes 3 facing each other. The suspension support portions 7 of the respective long steel pipes 3 are arranged so as to face each other, and are in positions substantially corresponding to the attachment ring 1 c of the horizontally long bag body 1.

各吊下支持部7は、反対側の吊下支持部7側に斜め上方に向かって延設されたアームを備え、その先端には張出部7aが設けられており、この張出部7aの下面に逆U字型の連結具8が取り付けられている。   Each suspension support portion 7 includes an arm extending obliquely upward on the opposite suspension support portion 7 side, and an overhang portion 7a is provided at the tip, and this overhang portion 7a. An inverted U-shaped connector 8 is attached to the lower surface of the.

この吊下支持部7のアームは鋼板で形成されており、左右両側にそれぞれ配置した二枚のへの字型の側板を先端部で連結したもので、左右の側板は基端部に向かって間隔が徐々に広くなるように形成されている。そして、左右の側板の間に連結具8の開閉を行うためのエアシリンダ9が配設されている。なお、エアシリンダの代わりに油圧シリンダを用いることもできる。   The arm of the suspension support portion 7 is formed of a steel plate, and is formed by connecting two U-shaped side plates arranged on the left and right sides at the distal end, and the left and right side plates are directed toward the base end portion. The interval is formed so as to gradually increase. An air cylinder 9 for opening and closing the connector 8 is disposed between the left and right side plates. A hydraulic cylinder may be used instead of the air cylinder.

このエアシリンダ9は、図2(c)に示すように、吊下支持部7の張出部7aと略平行に配置され、且つ、ピストンロッド9aが連結具8に向かって伸縮するように配置されており、ピストンロッド9aを伸ばし先端部を連結具8の係合孔8aに挿通することによって、連結具8を閉状態にすることができる。またピストンロッド9aを縮め先端部を連結具8の係合孔8aから引き抜くことで連結具8を開状態にすることができる。   As shown in FIG. 2 (c), the air cylinder 9 is disposed substantially parallel to the overhanging portion 7 a of the suspension support portion 7, and is disposed so that the piston rod 9 a expands and contracts toward the connector 8. The connecting tool 8 can be brought into a closed state by extending the piston rod 9a and inserting the tip end thereof into the engaging hole 8a of the connecting tool 8. Further, the connecting tool 8 can be opened by contracting the piston rod 9a and pulling the tip portion out of the engaging hole 8a of the connecting tool 8.

連結具8の開閉は、ピストンロッド9aの中間部に一端で接続され後方に傾いた状態で配設されている棒状の把持部9bを持ち、この把持部9bを前方へ移動させることによりピストンロッド9aを手動で伸ばしたり、シリンダ9cの前端部に設けた給気口9dからエアを供給してピストン9e後退させることで、ピストンロッド9aを自動的に縮めて行うことができる。   The connecting tool 8 is opened and closed by having a rod-like gripping portion 9b connected to one end of the piston rod 9a at one end and tilted backward, and moving the gripping portion 9b forward to move the piston rod The piston rod 9a can be automatically contracted by extending the 9a manually or by supplying air from the air supply port 9d provided at the front end of the cylinder 9c to retract the piston 9e.

また、横長袋体を吊下装置2にセットする際に用いる取付治具10を図3(a)(b)に示す。この取付治具10は、二本のH型鋼11を間隔をあけて平行に並べ、両方のH型鋼11間を長手方向に所定の間隔ごとに配置した角パイプ12で連結することで形成したフレーム13を備えており、各H型鋼11の両端にはそれぞれ上方に反った形状のツメ11aが取り付けられている。   Moreover, the attachment jig | tool 10 used when setting a horizontally long bag body to the suspending apparatus 2 is shown to Fig.3 (a) (b). This mounting jig 10 is a frame formed by arranging two H-shaped steels 11 in parallel at intervals and connecting both H-shaped steels 11 with square pipes 12 arranged at predetermined intervals in the longitudinal direction. 13, and claws 11 a that are warped upward are attached to both ends of each H-shaped steel 11.

そしてフレーム13の上面には、各角パイプ12間の開口部を塞ぐようにして1ピッチおきにグレーチング14が取り付けられており、両方のH型鋼11の上面にはそれぞれ、横長袋体1の取付リング1cを係止可能なピン15が長手方向に所定間隔毎に設けられている。両方のH型鋼11に設けられているピン15はそれぞれ相対した配置になっており、横長袋体1の取付リング1cにほぼ対応した位置にある。また、各H型鋼11の上面には、長手方向両側にフレーム13を吊り上げる際に用いるアイボルト16がそれぞれ配設されている。   And the grating 14 is attached to the upper surface of the frame 13 every other pitch so as to close the opening between the square pipes 12, and the horizontal bag 1 is attached to the upper surfaces of both H-shaped steels 11. Pins 15 capable of locking the ring 1c are provided at predetermined intervals in the longitudinal direction. The pins 15 provided on both H-shaped steels 11 are arranged to face each other, and are in positions corresponding to the mounting ring 1 c of the horizontally long bag body 1. Further, on the upper surface of each H-shaped steel 11, eyebolts 16 used when lifting the frame 13 are disposed on both sides in the longitudinal direction.

次に、これらの吊下装置2を用いて横長袋体1を沈設する方法について説明する。空の横長袋体1を岸壁G上に、投入口1aを上向きにした状態で延ばして配置する。そして、取付治具10をクレーン等で吊り上げて横長袋体1の上方に移動させ(図4(a)参照)、長手方向の向きを横長袋体1に合わせつつ所定の高さまで下ろす。それから取付治具10の各ピン15に、横長袋体1の取付リング1cをそれぞれ係止させるとともに、グレーチング14間の各開口部から横長袋体の投入口1aをそれぞれ上方に向かって引き出す。   Next, a method for sinking the horizontally long bag 1 using these suspension devices 2 will be described. An empty horizontally long bag 1 is extended on the quay G, with the insertion port 1a facing upward. Then, the mounting jig 10 is lifted by a crane or the like and moved above the horizontally long bag body 1 (see FIG. 4A), and the longitudinal direction is adjusted to the horizontally long bag body 1 and lowered to a predetermined height. Then, the mounting ring 1c of the horizontally long bag body 1 is locked to each pin 15 of the mounting jig 10, and the charging port 1a of the horizontally long bag body is pulled out upward from each opening between the gratings 14.

このように、取付治具10を用いるメリットは、横長袋体1を吊下装置2に取り付ける際の作業がし易くなる他、吊下装置2を岸壁に引き上げる際の衝突等による損傷を回避できる点である。   As described above, the merit of using the mounting jig 10 is that it is easy to work when the horizontally long bag body 1 is attached to the suspension device 2, and damage due to a collision or the like when the suspension device 2 is pulled up to the quay can be avoided. Is a point.

一方、吊下装置2はタグボート(図示省略)に係留した状態で岸壁G付近に浮かばせておく(図5参照)。両側の各フロート6には、途中に給排気用操作部19を設け一端をコンプレッサ20に接続している一対の給排気ホース21を、長手方向両端に別々に接続する。また、一端をコンプレッサに接続している別の給気ホース22を、吊下支持部7にあるエアシリンダ9の各給気口9bを経由させるようにフレーム5に沿って配管した図示しない分配ホースに接続する(図6参照)。なお、コンプレッサ20と給排気用操作部19はタグボードに搭載しており、吊下装置2の浮沈や横長袋体1の切り離しを船上から遠隔操作できるようになっている。   On the other hand, the suspension device 2 is suspended near the quay G while being moored in a tugboat (not shown) (see FIG. 5). A pair of air supply / exhaust hoses 21 each having an air supply / exhaust operation portion 19 provided in the middle and having one end connected to the compressor 20 are separately connected to both ends in the longitudinal direction. Further, a distribution hose (not shown) in which another air supply hose 22 having one end connected to the compressor is piped along the frame 5 so as to pass through each air supply port 9b of the air cylinder 9 in the suspension support portion 7. (See FIG. 6). Note that the compressor 20 and the air supply / exhaust operation unit 19 are mounted on a tag board so that the suspension device 2 can be remotely controlled from the shipboard, and the horizontal bag 1 can be detached.

水面に浮かべた吊下装置2は、給排気ホース21からフロート6に空気を充填するとともに、給気ホース22からエアシリンダ9に空気を供給し連結具8を開状態にしておく。   The suspension device 2 floating on the water surface fills the float 6 with air from the air supply / exhaust hose 21 and supplies air from the air supply hose 22 to the air cylinder 9 to keep the connector 8 open.

なお、岸壁Gにはホッパー17が設置されホッパー17に土砂等を投入するための重機18が配置されている。ホッパー17の排出口には、一端を横長袋体1の投入口1aに挿入可能なフレキシブルホース17aの他端部が接続されている(図5参照)。   A hopper 17 is installed on the quay G, and a heavy machine 18 for putting earth and sand into the hopper 17 is arranged. One end of a flexible hose 17a that can be inserted into the insertion port 1a of the horizontally long bag body 1 is connected to the discharge port of the hopper 17 (see FIG. 5).

次に、横長袋体1をセットした取付治具10を吊り上げて吊下装置2の上方に移動させ(図7(a))、吊下装置2と長手方向の向きを合わせながら徐々に下ろし、取付治具10のツメ11aを吊下装置2のフレーム5の短い鋼管4にあずけた状態にして吊下装置2に載置する。   Next, the mounting jig 10 on which the horizontally long bag body 1 is set is lifted and moved above the hanging device 2 (FIG. 7A), and gradually lowered while matching the direction of the hanging device 2 in the longitudinal direction, The claw 11 a of the mounting jig 10 is placed on the suspension device 2 in a state where it is attached to the short steel pipe 4 of the frame 5 of the suspension device 2.

そして、横長袋体1の取付リング1cを取付治具10のピン15から外して連結具8に付け替え、ピストンロッド9aを伸長させて連結具8を閉じ取付リング1cを連結具8に連結する。全ての取付リング1cの連結作業が終了し、横長袋体1を吊下装置2の吊下支持部7に吊下げた状態にしたら、取付治具10を吊り上げて地上に移動させる。   Then, the attachment ring 1 c of the horizontally long bag 1 is removed from the pin 15 of the attachment jig 10 and replaced with the connector 8, the piston rod 9 a is extended to close the connector 8, and the attachment ring 1 c is connected to the connector 8. When all the attachment rings 1c are connected and the horizontally long bag 1 is suspended from the suspension support portion 7 of the suspension device 2, the attachment jig 10 is lifted and moved to the ground.

そして、吊下装置2に吊り下げた横長袋体1の投入口1aから、フレキシブルホース17aを通してホッパー17内の土砂を供給し土砂を充填する(図7(b))。充填率は80%程度以下にし、ある程度内部に余裕を設けておく。これは、着底した横長袋体1が、充填した土砂の流動によって横広がりの変形をし、より安定した状態で設置することが可能になるからである。   And the earth and sand in the hopper 17 is supplied through the flexible hose 17a from the insertion port 1a of the horizontally long bag body 1 suspended in the suspension device 2 and filled with the earth and sand (FIG. 7B). The filling rate is about 80% or less, and a margin is provided inside to some extent. This is because the horizontally long bag body 1 that has settled down can be installed in a more stable state due to the deformation of the lateral spread due to the flow of the filled earth and sand.

土砂が横長袋体1に充填されれば、投入口1aを収納部1dに折り畳んで収納し、収納部1dの口を閉じて(図7(c))、図8に示すように、吊下装置2をタグボートTの小型船舶で曳航して、水中構造物を設置する水域に移動させる。   When the earth and sand are filled in the horizontally long bag body 1, the input port 1a is folded and stored in the storage portion 1d, the mouth of the storage portion 1d is closed (FIG. 7 (c)), and as shown in FIG. The device 2 is towed by a small boat of a tugboat T and moved to a water area where an underwater structure is installed.

この際、横長袋体1は吊下装置2に、袋体の全長が水面付近の深さで吊り下げらたれた状態で運搬されるので、横長袋体1を水底に引きずったり浅瀬に乗り上げたりさせることなく、目的の水域まで運ぶことができる。   At this time, since the horizontally long bag body 1 is transported to the suspending device 2 in a state where the entire length of the bag body is suspended at a depth near the water surface, the horizontally long bag body 1 is dragged to the bottom of the water or laid on a shallow water. It can be transported to the target water area without causing it.

そうして、横長袋体1を沈設する場所の上方の水面に吊下装置2を配置し、吊下装置2とタグボートTとを切り離したのちに、フロート6の内部の空気を少しずつ排出して浮力を低下させ吊下装置2を徐々に沈下させる。そして、横長袋体1が水底Bに着底したら(図7(d))、吊下装置2のエアシリンダ9に空気を供給して連結具8を開状態にし、吊下装置2から横長袋体1を切り離して水底Bに沈設する。   Then, after placing the suspension device 2 on the water surface above the place where the horizontally long bag body 1 is sunk and separating the suspension device 2 and the tugboat T, the air inside the float 6 is discharged little by little. Thus, the buoyancy is reduced and the suspension device 2 is gradually lowered. When the horizontally long bag body 1 reaches the bottom B (FIG. 7 (d)), air is supplied to the air cylinder 9 of the suspension device 2 to open the connector 8, and the horizontally long bag is removed from the suspension device 2. The body 1 is cut off and set on the bottom B.

横長袋体1を切り離した吊下装置2は、フロート6に再び空気を供給し浮力を与えて水面に浮上させる(図7(e))。なお、吊下装置2は横長袋体1を切り離したことで軽くなるため、フレーム5の鋼管の浮力だけで浮上することができるが、次の作業を効率良く
行なうため、フロート6にエアを供給し短時間で浮上させるようにしている。そして、タグボート等で岸壁Gまで移動させて再び同じ手順で別の横長袋体を吊り下げる。
The suspension device 2 from which the horizontally long bag body 1 is cut off supplies air to the float 6 again to give buoyancy to float on the water surface (FIG. 7 (e)). In addition, since the suspension device 2 becomes light by separating the horizontally long bag body 1, the suspension device 2 can be lifted only by the buoyancy of the steel pipe of the frame 5, but air is supplied to the float 6 in order to efficiently perform the next operation. And I try to surface in a short time. And it moves to the quay G with a tugboat etc. and hangs another horizontally long bag body in the same procedure again.

こうして図9(a)、(b)に示すように、水底Bに横長袋体1を積み上げて人工リーフ等の潜堤・漁礁・海藻礁などを構築したり、水底に敷設して洗掘防止用の水底地盤等を構築するのであるが、隣り合う横長袋体1の取付リング1cどうしを結束するなどして一体にしておくと、構築した水中構造をより安定化させることができる。一体にするための治具は、横長袋体1どうしをしっかりと連結できるものであれば良く、例えば、取付リング1cどうしを連結する場合には、図示したような両端にゲート付のフックがそれぞれ取り付けられたバックル状の治具も有効である。   Thus, as shown in FIGS. 9A and 9B, the horizontally long bags 1 are stacked on the bottom B to construct submerged dikes such as artificial reefs, fishing reefs, seaweed reefs, etc., or laid on the bottom to prevent scouring. However, if the attachment rings 1c of the adjacent horizontally long bags 1 are bound together to form an integrated structure, the constructed underwater structure can be further stabilized. The jig for integration may be any one as long as it can firmly connect the horizontally long bags 1. For example, when connecting the mounting rings 1 c, hooks with gates are attached to both ends as shown in the figure. An attached buckle-shaped jig is also effective.

なお、図10に示すように、吊下装置2を複数台用意し、各吊下装置2に土砂を充填した横長袋体1をそれぞれ吊り下げ、これらの吊下装置2を一列に連結した状態にして、端に位置する吊下装置をタグボートTに連結して曳航すれば、一度に複数の横長袋体1を運搬し沈設することができるため、より効率的に作業を行うことができる。   In addition, as shown in FIG. 10, a plurality of suspension devices 2 are prepared, the horizontally long bags 1 filled with earth and sand are suspended in the suspension devices 2, and the suspension devices 2 are connected in a row. If the suspension device located at the end is connected to the tugboat T and towed, a plurality of horizontally long bags 1 can be transported and set at a time, so that the work can be performed more efficiently.

この実施形態にかかる吊下装置2はトラック輸送が可能なサイズであるため、海に限らず河川、湖沼、ダム湖などでも手軽に使用することができる。例えば、大きな河川では自然回復のための流勢抑制潜堤、ダム湖では上流部に堆積した土砂等を水深の深い湖底に運ぶのに用いることができる。   Since the suspension device 2 according to this embodiment has a size capable of truck transportation, it can be easily used not only in the sea but also in rivers, lakes, dam lakes, and the like. For example, in a large river, it can be used to carry a flow restraint dike for natural recovery, and in a dam lake, sediment deposited in the upstream part can be transported to the deep bottom of the lake.

それから、フロートはゴム製のみならず、鋼管や硬質の樹脂製パイプを用いて形成することもでき、その場合には空気圧を利用して、内部に水を出し入れすることによって浮沈させることもできる。   Then, the float can be formed not only of rubber but also using a steel pipe or a hard resin pipe. In that case, the float can be floated and lowered by taking water into and out of the inside using air pressure.

また、吊下装置2は図11に示すように、吊下装置2の長尺の鋼管3を片側に二本ずつ配置して、フロート6を片側二本ずつ設けるようにすると、吊下装置2の浮力をアップさせることができる。こうすると吃水が浅くなるため、水深が浅い場所などでは有利になる。   In addition, as shown in FIG. 11, the suspension device 2 is configured such that two long steel pipes 3 of the suspension device 2 are arranged on each side and two floats 6 are provided on each side. Buoyancy can be increased. In this way, the drowning becomes shallow, which is advantageous in places where the water depth is shallow.

上記実施形態はある程度水深のある場所に水中構造物を構築する場合における横長袋体の沈設方法を説明しているが、水深が浅い場合には、吊下装置2を沈下させずに横長袋体1を切り離し、自重により横長袋体1を沈めて水底Bに設置することも可能である。   In the above embodiment, the method for laying the horizontally long bag body in the case where the underwater structure is constructed in a place where there is a certain depth of water is described. However, when the water depth is shallow, the horizontally long bag body without sinking the suspension device 2. It is also possible to detach 1 and sink the horizontally long bag body 1 by its own weight and install it on the bottom B.

この場合、横長袋体1をより正確に設置場所に沈設するため、図12のようにフレーム5の長尺の鋼管3の一方にウインチ23を所定間隔で配置し、ウインチ23から繰り出したロープ24を横長袋体1の両方の取付リング1cに通したのち、先端を他方の長尺の鋼管3に着脱可能に固定するように構成することもできる。こうすると、ロープ24を、ウインチ23で巻き取ったり繰り出したりすることによって、横長袋体1を上下に移動することが可能になり、位置合わせをより細かく行なえるようになるからである。   In this case, in order to sink the horizontally long bag body 1 more accurately at the installation location, as shown in FIG. 12, winches 23 are arranged at predetermined intervals on one of the long steel pipes 3 of the frame 5, and the rope 24 fed out from the winch 23. Can be configured to be detachably fixed to the other long steel pipe 3 after passing through both the attachment rings 1c of the horizontally long bag body 1. By doing so, it is possible to move the laterally long bag body 1 up and down by winding and unwinding the rope 24 with the winch 23, so that the positioning can be performed more finely.

そして、本実施形態で用いている連結具8およびエアシリンダ9の代わりに図示は省略するが、解除用の浮子が装着されているフックを用いることができる。このフックは先端寄りの部分に、内部に空気を出し入れすることができる浮子が装着されており、水中で浮子に空気を供給すると、フックが先端を下に向け横向きの状態になることにより、自動的に横長袋体の取付リングか外れる仕組みになっている。   And although illustration is abbreviate | omitted instead of the connector 8 and the air cylinder 9 which are used by this embodiment, the hook with which the float for cancellation | release is mounted | worn can be used. This hook is equipped with a float that allows air to be taken in and out of the inside of the hook. When air is supplied to the float in the water, Therefore, the attachment ring of the horizontally long bag body is detached.

また、別の例では回転式のフックを備えた連結具を用いることもできる。図13に示すように、この連結具25は横方向にスライド可能なフック止め26と、このフック止め26の先端部を係止させ回転を阻止できるようになっている回転フック27とを、主な構成
要素として備えている。これらは、図示しないアーム等の支持台に取り付けられていて、フック止め26はスライド方向両端部が、支持台に固定したホルダー28にそれぞれ支持されており、且つ、中間部には操作レバー29の先端部が回転可能に取り付けられている。この操作レバー29は、先端部寄りの位置で支持台に軸支されており、操作レバー29を旋回させるとフック止め26が横方向に移動する仕組みになっている。
In another example, a connecting device having a rotary hook can be used. As shown in FIG. 13, this connector 25 includes a hook stopper 26 slidable in the lateral direction, and a rotary hook 27 that can lock the tip end portion of the hook stopper 26 to prevent rotation. As a major component. These are attached to a support base such as an arm (not shown), and both ends in the sliding direction of the hook stopper 26 are supported by holders 28 fixed to the support base. The tip is rotatably attached. The operation lever 29 is pivotally supported by the support base at a position near the tip, and when the operation lever 29 is turned, the hook stopper 26 moves in the lateral direction.

一方、回転フック27は基端部で支持台に軸支されており、フック止め26を回転フック27の方向へスライドさせることによって回転を阻止し、ロック状態にすることができる。そして、フック止め26を反対方向へスライドさせると、回転フック27の先端部からフック止め24が外れ、ロック状態を解除することができる。   On the other hand, the rotation hook 27 is pivotally supported by the support base at the base end portion, and can be prevented from rotating by sliding the hook stopper 26 in the direction of the rotation hook 27 to be in a locked state. When the hook stopper 26 is slid in the opposite direction, the hook stopper 24 comes off from the tip of the rotary hook 27, and the locked state can be released.

この回転フック27を、横長袋体の取付リング1cを通した状態でロック状態にし、フック止め26をスライドさせてロック状態を解除すると、回転フック27が回転して取付リング1cが外れ横長袋体を切り離すことができる。   When the rotary hook 27 is locked in a state where the attachment ring 1c of the horizontally long bag body is passed through and the hook stopper 26 is slid to release the lock state, the rotation hook 27 is rotated and the attachment ring 1c is detached to release the horizontally long bag body. Can be separated.

また、横長袋体1については、ポリエステル系のほか、ポリエチレン系、ポリプロピレン系、ナイロン系、植物繊維系などの織布や不織布、または、ナイロン系やポリエステル系などの繊維で製造したネットを用いて形成することができる。   For the horizontally long bag 1, in addition to polyester, a woven or non-woven fabric such as polyethylene, polypropylene, nylon or vegetable fiber, or a net made of nylon or polyester fiber is used. Can be formed.

そして、図14のように吊ベルト1bを、横長袋体1を側面から見て、取付リング1cの真下から横長袋体の中間部方向へずれたところに位置している袋体底部を経由するように配設すると、充填した土砂等が横長袋体の中間部に寄り集まり横長袋体の長さが縮まるため、横長袋体の形状が保持し易くなる。それから、吊ベルト1bを1つの取付リング1cに対し2本設けて、各吊ベルト1bを側面視、取付リング1cの真下から別々の横長袋体の端部方向へずれた位置にある袋体底部を経由するように配設すると、土砂等を充填した際の袋体の膨らみを抑えることができる。このように、土砂等を充填した横長袋体を吊下装置に吊下げた際、その垂れ下がりを抑えることができるため運搬し易くなる。   Then, as shown in FIG. 14, the suspension belt 1 b passes through the bottom portion of the bag body that is located at a position shifted from directly below the attachment ring 1 c toward the middle portion of the horizontally long bag body when the horizontally long bag body 1 is viewed from the side. If it arrange | positions in this way, since the filled earth and sand etc. will gather in the intermediate part of a horizontally long bag body, and the length of a horizontally long bag body will shrink | contract, it will become easy to hold | maintain the shape of a horizontally long bag body. Then, two suspension belts 1b are provided for one attachment ring 1c, and each suspension belt 1b is viewed from the side, and the bottom of the bag body is located at a position shifted from the position directly below the attachment ring 1c toward the end of the separate horizontally long bag body. If it arrange | positions so that it may pass through, the swelling of the bag body at the time of filling earth and sand etc. can be suppressed. Thus, when the horizontally long bag filled with earth and sand is suspended from the suspension device, the drooping can be suppressed, so that it is easy to carry.

なお、横長袋体に充填するものとして浚渫土砂を用いると、従来産業廃棄物として埋立処分されている浚渫土砂の利用が促進され、飽和状態の埋立処分場の負担を軽減することができる。また、管中混合固化処理工法と組み合わせると、浚渫土砂の早期利用が可能になり、したがって、浚渫工事と平行して、採取した浚渫土砂を横長袋体に充填し水中構造物を構築できるようになるため、浚渫土砂の再利用を効率良く行なうことができる。   In addition, when dredged sand is used for filling the horizontally long bags, the use of dredged sand that has been disposed of as industrial waste in the past can be promoted, and the burden on a landfill site in a saturated state can be reduced. In addition, when combined with the mixed solidification treatment method in the pipe, dredged soil can be used at an early stage.Therefore, in parallel with dredging work, the collected dredged sand can be filled into horizontally long bags to construct an underwater structure. Therefore, dredged soil can be reused efficiently.

水中構造物の構築に用いられる横長袋体を示しており、(a)は平面図、(b)は側面図を表している。The horizontal elongate bag body used for construction of an underwater structure is shown, (a) is a top view, (b) represents the side view. 本発明にかかる吊下装置の実施形態を示し、(a)は平面図、(b)は(a)におけるA−A矢視方向の断面図、(c)は吊下支持部の構造を示す部分拡大図である。Embodiment of the suspension apparatus concerning this invention is shown, (a) is a top view, (b) is sectional drawing of the AA arrow direction in (a), (c) shows the structure of a suspension support part. It is a partial enlarged view. 吊下装置に横長袋体を吊下げる際に用いる取付治具であり、(a)は平面図、(b)は側面図を現している。It is an attachment jig used when hanging a horizontally long bag body on a hanging device, (a) shows a plan view and (b) shows a side view. (a)、(b)は横長袋体を取付治具に取り付ける際の手順を示した説明図である。(A), (b) is explanatory drawing which showed the procedure at the time of attaching a horizontally long bag body to an attachment jig. 吊下装置を岸壁付近に浮かべた状態を示す説明図であり、土砂を供給するためのホッパーとホッパーに土砂を投入する重機の配置も示している。It is explanatory drawing which shows the state which floated the suspension apparatus in the quayside vicinity, and has also shown arrangement | positioning of the heavy machine which throws earth and sand into a hopper for supplying earth and sand. 吊下装置の空気配管の配置を示す概略図である。It is the schematic which shows arrangement | positioning of the air piping of a suspending apparatus. 横長袋体の沈設手順を示す説明図でありそれぞれ、(a)横長袋体の吊り下げ作業を行なっている図、(b)横長袋体に土砂を投入している状態、(c)土砂が充填された横長袋体を吊下装置に吊り下げた状態、(d)吊下装置を沈下させた状態、(e)横長袋体を沈設し吊下装置を再び水面に浮上させた状態を示している。It is explanatory drawing which shows the installation procedure of a horizontal bag body, respectively, (a) The figure which is carrying out the hanging work of a horizontal bag body, (b) The state which has put earth and sand into the horizontal bag body, (c) The earth and sand A state in which the filled horizontally long bag is suspended from the suspension device, (d) a state in which the suspension device is sunk, and (e) a state in which the horizontally long bag body is laid down and the suspension device is floated on the water surface again. ing. 吊下装置をタグボートで曳航している状態を示す概念図である。It is a conceptual diagram which shows the state which has towed the suspension apparatus with the tugboat. (a)図は沈設した横長袋体で構築した水中構造物の側面図であり、(b)図はその平面図である。(A) A figure is a side view of the underwater structure constructed with the horizontally long bag body which was laid, and (b) figure is the top view. 土砂を充填した横長袋体を吊り下げた複数の吊下装置を連結し移動させている状態を示す説明図である。It is explanatory drawing which shows the state which has connected and moved the several suspending device which suspended the horizontally long bag body filled with earth and sand. 本発明にかかる吊下装置の別の実施形態を示す断面図である。It is sectional drawing which shows another embodiment of the suspending apparatus concerning this invention. 本発明にかかる吊下装置のさらに別の実施形態を示す断面図である。It is sectional drawing which shows another embodiment of the suspending apparatus concerning this invention. 連結具の別の実施形態であり、(a)図はロック状態、(b)はロックを解除した状態を示す概念図である。It is another embodiment of a connector, (a) A figure is a locked state, (b) is a conceptual diagram which shows the state which cancelled | released the lock | rock. 本発明にかかる横長袋体の別の実施形態を示す側面図である。It is a side view which shows another embodiment of the horizontally long bag body concerning this invention.

符号の説明Explanation of symbols

1 横長袋体
2 吊下装置
3 長尺の鋼管
4 短尺の鋼管
5 フレーム
6 ゴムフロート
7 吊下支持部
8 連結具
9 エアシリンダ
DESCRIPTION OF SYMBOLS 1 Horizontally long bag body 2 Suspension apparatus 3 Long steel pipe 4 Short steel pipe 5 Frame 6 Rubber float 7 Suspension support part 8 Connection tool 9 Air cylinder

Claims (10)

水底に沈下させ潜堤や洗掘防止用の水底地盤等の水中構造物を構築するための、土砂等を充填した横長袋体の沈設方法であって、
土砂等を充填した前記横長袋体を、内部に空気を収納可能なフロートを取り付け同フロートに空気を供給し水面に浮かべている浮沈式の吊下装置に、袋体全長が水面付近の深さに位置するようにして吊り下げ、この状態で前記吊下装置を、前記水中構造物の構築場所の上方に位置する水面に移動させ、それから前記フロートの空気を排出して前記吊下装置を沈下させ、前記横長袋体を着底させるか或いは着底場所に接近させたのち、前記横長袋体を前記吊下装置から切り離し、その後前記フロートに空気を供給して前記吊下装置を浮上させることを特徴とする土砂等を充填した横長袋体の沈設方法。
A method of sinking a horizontally long bag filled with earth and sand to build an underwater structure such as a submerged dike and submerged ground for scouring prevention.
The above-mentioned horizontally long bag filled with earth and sand is attached to a float that can store air inside and floats on the water surface by supplying air to the float. In this state, the suspension device is moved to the water surface located above the construction site of the underwater structure, and then the air in the float is discharged to sink the suspension device. The horizontal bag body is bottomed or brought close to the bottoming position, and then the horizontal bag body is separated from the suspension device, and then the air is supplied to the float to float the suspension device. A method for sinking a horizontally long bag filled with earth and sand.
水底に沈下させ潜堤や洗掘防止用の水底地盤等の水中構造物を構築するための、土砂等を充填した横長袋体の沈設方法であって、
土砂等を充填した前記横長袋体を、内部に浮力体を収納したフロートを取り付けて水面に浮かべている吊下装置に、袋体全長が水面付近の深さに位置するようにして吊り下げ、この状態で前記吊下装置を、前記水中構造物の構築場所の上方に位置する水面に移動させたのち、前記横長袋体を前記吊下装置から切り離すことにより沈下させて着底させることを特徴とする土砂等を充填した横長袋体の沈設方法。
A method of sinking a horizontally long bag filled with earth and sand to build an underwater structure such as a submerged dike and submerged ground for scouring prevention.
Suspend the horizontally long bag filled with earth and sand, etc. to a suspension device that floats on the water surface with a float containing a buoyant body inside, so that the bag body is located at a depth near the water surface, In this state, the suspension device is moved to the water surface located above the construction site of the underwater structure, and then the horizontally elongated bag body is separated from the suspension device to sink and settle down. A method for laying a horizontally long bag filled with earth and sand.
土砂等を充填した前記横長袋体が吊下げられた複数台の前記吊下装置を一列に連結し、一方の端の前記吊下装置に残りの前記吊下装置を牽引させるようにして前記水中構造物の構築場所の上方に位置する水面に移動させたのちに、前記各吊下装置の前記横長袋体を順次沈設することを特徴とする請求項1または2記載の土砂等を充填した横長袋体の沈設方法。   A plurality of the suspension devices in which the horizontally long bags filled with earth and sand are suspended are connected in a row, and the remaining suspension devices are pulled by the suspension device at one end so that the underwater device is pulled. 3. The horizontally long filled with earth and sand or the like according to claim 1 or 2, wherein the horizontally long bags of the respective suspension devices are sequentially sunk after being moved to the water surface located above the construction site of the structure. How to set the bag. 前記横長袋体の切り離しを、船上または陸上から遠隔操作によって行なうことを特徴とする請求項1〜3のいずれかに記載の土砂等を充填した横長袋体の沈設方法。   The method for laying a horizontally long bag filled with earth and sand according to any one of claims 1 to 3, wherein the horizontally long bag is separated from a ship or from land. 水面に浮上させている前記吊下装置に空の前記横長袋体を吊下げ、それから前記横長袋体に土砂等を充填することを特徴とする請求項1〜4のいずれかに記載の土砂等を充填した横長袋体の沈設方法。   The sand or the like according to any one of claims 1 to 4, wherein the empty horizontally long bag is suspended from the suspension device floating on the water surface, and then the horizontally long bag is filled with earth and sand. Method of settling horizontally long bags filled with 前記請求項1〜5のいずれか1項の土砂等を充填した横長袋体の沈設方法に記載されている前記横長袋体が、その外周面に底部を経由させた状態で取り付けられ長手方向から見てU字状になっている吊ベルトを備え、同吊ベルトが前記横長袋体の長手方向に所定間隔毎に配設され、前記各吊ベルトの両端部に、前記吊下装置に配置した連結具への取付部がそれぞれ設けられていることを特徴とすること。   The said horizontal bag body described in the sedimentation method of the horizontal bag body filled with the earth and sand of any one of the said Claims 1-5 is attached in the state which passed the bottom part to the outer peripheral surface from the longitudinal direction. A suspension belt having a U-shape as viewed is provided, and the suspension belt is disposed at predetermined intervals in the longitudinal direction of the laterally long bag body, and is disposed on the suspension device at both ends of each suspension belt. It is characterized in that each of the attachment parts to the connector is provided. 前記吊ベルトが、前記横長袋体を側方から見て、前記取付部の真下よりも前記横長袋体の中央部寄りにずれた位置の前記底部を経由していることを特徴する請求項6記載の横長袋体。   The said suspension belt is passing through the said bottom part of the position which shifted | deviated to the center part of the said horizontal elongate bag body rather than just under the said attachment part seeing the said elongate bag body from the side. The horizontally long bag body as described. 前記吊ベルトが、前記横長袋体を側方から見て、前記底部に向かって前記横長袋体の長手方向に開いた二股形状になっていることを特徴とする請求項6記載の横長袋体。   The laterally long bag body according to claim 6, wherein the hanging belt has a bifurcated shape that opens in the longitudinal direction of the laterally long bag body toward the bottom when the laterally long bag body is viewed from the side. . 水底に沈下させ潜堤や洗掘防止用の水底地盤等の水中構造物を構築するために用いられる、土砂等を充填した横長袋体を沈設するための装置であって、
少なくとも前記横長袋体の長さと同程度の全長を有する装置本体に、浮力体を内部に収納可能なフロートが設けられるとともに、前記横長袋体を前記装置本体の全長方向と、略
平行状態で吊下げ可能な吊下支持部が全長方向に沿って所定の間隔で配設されており、前記フロートは、吊下げられた前記横長袋体が水面付近の深さに位置するように、前記装置本体を浮かせることが可能な浮力を有していることを特徴する横長袋体の吊下装置。
An apparatus for sinking a horizontally long bag filled with earth and sand, which is used to construct an underwater structure such as a submerged dike or a submerged ground for preventing scouring by sinking to the bottom of the water,
A float capable of accommodating a buoyancy body is provided on the apparatus main body having an overall length that is at least as long as the length of the laterally long bag body, and the laterally long bag body is suspended substantially parallel to the overall length direction of the apparatus body. Suspension support portions that can be lowered are disposed at predetermined intervals along the entire length direction, and the float is arranged so that the suspended horizontally long bag body is located at a depth near the water surface. A suspension device for a horizontally long bag, characterized by having a buoyancy capable of floating the bag.
前記浮力体として空気が用いられ、前記フロートに出し入れ可能になっていることを特徴とする請求項9記載の横長袋体の吊下装置。   The suspension device for a horizontally long bag according to claim 9, wherein air is used as the buoyancy body and can be taken in and out of the float.
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