JP6767179B2

JP6767179B2 - How to repair the trap, the repair structure of the trap, the trap and the dam

Info

Publication number: JP6767179B2
Application number: JP2016123506A
Authority: JP
Inventors: 信秀淺井
Original assignee: JFE Metal Products and Engineering Inc
Current assignee: JFE Metal Products and Engineering Inc
Priority date: 2016-06-22
Filing date: 2016-06-22
Publication date: 2020-10-14
Anticipated expiration: 2036-06-22
Also published as: JP2017227031A

Description

本発明は、捕捉体の補修方法、捕捉体の補修構造体、捕捉体及び堰堤に関する。 The present invention relates to a method for repairing a trap, a repair structure for a trap, a trap and a dam.

山間部の河川においては、台風や大雨等による土砂災害を防止するため、堰堤が設置される。堰堤は、水を通過させつつも土石流に含まれる岩石や流木が通過することを抑制するものである。特に、水を通過させる透過部に、土石流に含まれる岩石や流木を捕捉するため、鋼管柱と鋼管梁とを立体格子状に組み合わせた捕捉体を設けた格子型鋼製堰堤が知られている（例えば、特許文献１参照）。
捕捉体においては、柱材（支柱）の上端部と、河川の横断方向に配置した梁材（横梁）から下向きに突設させた柱頭部とをフランジで接合する。また、堰堤の非越流部には、梁端部材が埋め込まれており、梁材の両端部は、梁端部材とフランジを介して接合されている（例えば、特許文献２参照）。 In mountain rivers, dams will be installed to prevent sediment-related disasters caused by typhoons and heavy rains. The dam is intended to prevent the passage of rocks and driftwood contained in the debris flow while allowing water to pass through. In particular, in order to capture rocks and driftwood contained in debris flow in the permeation part through which water passes, a grid-type steel dam provided with a trap body in which steel pipe columns and steel pipe beams are combined in a three-dimensional grid pattern is known. (See, for example, Patent Document 1).
In the catching body, the upper end of the column material (column) and the stigma head projecting downward from the beam material (cross beam) arranged in the crossing direction of the river are joined by a flange. Further, a beam end member is embedded in the non-overflow portion of the dam, and both ends of the beam member are joined to the beam end member via a flange (see, for example, Patent Document 2).

特開平６−１０３３０号公報JP-A-6-10330 特開２０１１−８９３９３号公報Japanese Unexamined Patent Publication No. 2011-89393

ところで、土石流の発生により、図１２に示すように、想定外の礫径を有する大きな岩石Ｒが透過型の堰堤１００の捕捉体３００に衝突することがある。岩石Ｒは捕捉体３００によって捕捉されるが、捕捉体３００の支柱３１０及び梁３２０には想定以上の衝撃力が加わり、捕捉体３００の支柱３１０及び梁３２０が変形又は損傷することがある。
変形又は損傷した捕捉体３００は、支柱３１０及び梁３２０がそれぞれ備えるフランジＦ部同士の連結を解除することによって、捕捉体３００の損傷した部分を取り外し、新たな部分と交換することができる。
しかし、岩石Ｒとの衝突により捕捉体３００の既設部分も変形していることが多く、捕捉体３００における既設部分のフランジ部Ｆの位置も初期の設計位置からずれていることがある。つまり、初期の設計に基づいて形成されたものを新たに取り付けることが困難なことがある。 By the way, due to the generation of debris flow, as shown in FIG. 12, a large rock R having an unexpected gravel diameter may collide with the trap 300 of the transmission type dam 100. The rock R is captured by the capture body 300, but an impact force more than expected is applied to the support columns 310 and the beam 320 of the capture body 300, and the support columns 310 and the beam 320 of the capture body 300 may be deformed or damaged.
The deformed or damaged capture body 300 can remove the damaged portion of the capture body 300 and replace it with a new portion by releasing the connection between the flange F portions provided by the support column 310 and the beam 320, respectively.
However, the existing portion of the capture body 300 is often deformed due to the collision with the rock R, and the position of the flange portion F of the existing portion in the capture body 300 may also deviate from the initial design position. That is, it can be difficult to newly install what was formed based on the initial design.

そこで、本発明は、上記課題に鑑みてなされたものであり、捕捉体の既設部分が変形していた場合であっても、既設部分への交換部材の固定を容易にする捕捉体の補修方法、捕捉体の補修構造体、捕捉体及び堰堤を提供することを目的とする。 Therefore, the present invention has been made in view of the above problems, and a method for repairing a catching body that facilitates fixing of a replacement member to the existing part even when the existing part of the catching body is deformed. , Aim to provide repair structures, traps and dams for traps.

本発明は、支柱と梁とを備え、河川の上流から流れてくる流水を通すとともに土石及び流木を捕捉する捕捉体の補修方法であって、前記捕捉体の損傷部位を切断して除去し、前記損傷部位が除去された前記捕捉体の前記支柱及び前記梁の少なくとも一方の既設部分の外周面に、該外周面に対して移動可能に環状部材を取り付け、前記環状部材に前記損傷部位と交換する交換部材を載置し、前記環状部材に載置した前記交換部材の、前記既設部分に対する固定位置を調整して決定し、前記既設部分に対する前記交換部材の前記固定位置で、前記環状部材を前記既設部分に固定し、前記既設部分に固定された前記環状部材に前記交換部材を固定することを特徴とする。 The present invention is a method of repairing a trapped body provided with a support and a beam, allowing running water flowing from the upstream of a river to pass through, and capturing earth and stones and drifting trees, by cutting and removing a damaged portion of the trapped body. An annular member is movably attached to the outer peripheral surface of at least one existing portion of the support column and the beam of the capture body from which the damaged portion has been removed, and the annular member is replaced with the damaged portion. The replacement member to be mounted is placed, and the fixed position of the replacement member mounted on the annular member is adjusted and determined with respect to the existing portion, and the annular member is placed at the fixed position of the replacement member with respect to the existing portion. It is characterized in that the replacement member is fixed to the existing portion and fixed to the annular member fixed to the existing portion.

また、前記既設部分に対する前記環状部材の固定位置を調節する調節部材を前記既設部分の外周面に設け、前記環状部材を前記調節部材に仮置きした状態で当該環状部材の位置を調節することが好ましい。 Further, an adjusting member for adjusting the fixed position of the annular member with respect to the existing portion may be provided on the outer peripheral surface of the existing portion, and the position of the annular member may be adjusted with the annular member temporarily placed on the adjusting member. preferable.

また、前記交換部材を前記既設部分に固定した後に、前記調節部材を前記既設部分から取り外すことが好ましい。 Further, it is preferable to remove the adjusting member from the existing portion after fixing the replacement member to the existing portion.

また、前記捕捉体における損傷していない部位で前記損傷部位を切断することが好ましい。 In addition, it is preferable to cut the damaged part at an undamaged part of the trap.

また、前記捕捉体は、複数の支柱と複数の梁とが連結されて構成されており、前記支柱又は前記梁の連結部以外の箇所で前記損傷部位を切断することが好ましい。 Further, the trapping body is configured by connecting a plurality of columns and a plurality of beams, and it is preferable to cut the damaged portion at a position other than the columns or the connecting portion of the beams.

また、前記環状部材を前記既設部分に固定する前に、前記交換部材を固定する前記環状部材の表面とは反対側の裏面に、当該裏面に当接した状態で前記既設部分に裏当部材を固定することが好ましい。 Further, before fixing the annular member to the existing portion, a backing member is attached to the existing portion on the back surface opposite to the front surface of the annular member to which the replacement member is fixed, in a state of being in contact with the back surface. It is preferable to fix it.

また、前記環状部材を前記既設部分に固定する前に、前記環状部材に載置した前記交換部材を取り外すことが好ましい。 Further, it is preferable to remove the replacement member placed on the annular member before fixing the annular member to the existing portion.

また、前記交換部材を前記環状部材から取り外す前に、前記環状部材に対する前記交換部材の取り付け位置にマーキングを施すことが好ましい。 Further, before removing the replacement member from the annular member, it is preferable to mark the attachment position of the replacement member with respect to the annular member.

また、前記捕捉体の上方から前記環状部材を前記既設部分に接合することが好ましい。 Further, it is preferable to join the annular member to the existing portion from above the trapping body.

本発明は、支柱と梁とを備え、河川の上流から流れてくる流水を通すとともに土石及び流木を捕捉する捕捉体の損傷部位を補修する補修構造体であって、前記損傷部位を除去した前記捕捉体における前記支柱及び前記梁の少なくとも一方の既設部分の外周面に固定される環状部材と、前記環状部材に固定され、前記損傷部位と交換される交換部材と、を備えることを特徴とする。 The present invention is a repair structure provided with a support and a beam, which allows flowing water flowing from the upstream of a river to pass through and repairs a damaged part of a trapping body that captures earth and stone and driftwood, and the damaged part is removed. It is characterized by including an annular member fixed to the outer peripheral surface of at least one existing portion of the support column and the beam in the capture body, and a replacement member fixed to the annular member and replaced with the damaged portion. ..

また、前記既設部分の外周面に取り付けられて、前記環状部材の前記交換部材を臨む側とは反対側から前記環状部材を支持し、かつ前記既設部分に対する前記環状部材の固定位置を調節する調節部材を備えることが好ましい。 Further, an adjustment that is attached to the outer peripheral surface of the existing portion to support the annular member from a side opposite to the side of the annular member facing the replacement member and adjust the fixing position of the annular member with respect to the existing portion. It is preferable to include a member.

また、前記調節部材は、前記既設部分に対して着脱自在に設けられていることが好ましい。 Further, it is preferable that the adjusting member is detachably provided with respect to the existing portion.

また、前記交換部材を臨む面とは反対側の前記環状部材の裏面に当接しつつ、前記既設部分の外周面に固定される裏当部材を備えることが好ましい。 Further, it is preferable to provide a backing member which is fixed to the outer peripheral surface of the existing portion while being in contact with the back surface of the annular member on the side opposite to the surface facing the replacement member.

また、前記環状部材の内周縁は、前記交換部材が固定される表面から前記裏面に向かって縮径していくテーパ部を有することが好ましい。 Further, it is preferable that the inner peripheral edge of the annular member has a tapered portion whose diameter decreases from the front surface to which the replacement member is fixed toward the back surface.

また、前記交換部材の内径は、前記既設部分に対する前記環状部材の固定位置よりも切断位置側における前記既設部分の外径より大きいことが好ましい。 Further, it is preferable that the inner diameter of the replacement member is larger than the outer diameter of the existing portion on the cutting position side than the fixed position of the annular member with respect to the existing portion.

また、前記調節部材は前記環状部材を支持する支持部を有し、前記支持部は、前記環状部材に向かって進退自在であることが好ましい。 Further, it is preferable that the adjusting member has a support portion for supporting the annular member, and the support portion can move forward and backward toward the annular member.

本発明は、捕捉体であって、上記の補修構造体を、前記損傷部位を除去した前記既設部分に設けたことを特徴とする。 The present invention is characterized in that the trapped body is provided with the above-mentioned repair structure in the existing portion from which the damaged portion has been removed.

本発明は、堰堤であって、上記の捕捉体を、流水を通す透過部に設けたことを特徴とする。 The present invention is a dam, characterized in that the above-mentioned trap is provided in a permeation portion through which running water passes.

本発明によれば、捕捉体の既設部分が変形している場合であっても、捕捉体の既設部分に交換部材を容易に固定することができる。 According to the present invention, even when the existing portion of the capture body is deformed, the replacement member can be easily fixed to the existing portion of the capture body.

補修された捕捉体を備える透過型の堰堤の正面図である。It is a front view of a transmission type dam provided with a repaired trap. 補修後の捕捉体の側面図であり、（ａ）は図１のＩＩａにおける側面図であり、（ｂ）は図１のＩＩｂにおける側面図である。It is a side view of the captured body after the repair, (a) is a side view in IIa of FIG. 1, and (b) is a side view of IIb of FIG. 捕捉体の損傷部位の交換部材を示す図であり、（ａ）は正面図であり、（ｂ）は側面図である。It is a figure which shows the exchange member of the damaged part of a trap body, (a) is a front view, and (b) is a side view. 補修構造体を説明するための拡大図である。It is an enlarged view for demonstrating the repair structure. 補修構造体における環状部材の斜視図である。It is a perspective view of the annular member in a repair structure. （ａ）は損傷前の捕捉体の側面図であり、（ｂ）は土石流中の巨礫が衝突した捕捉体の側面図であり、（ｃ）は変形又は損傷した捕捉体の側面図である。(A) is a side view of the trapped body before damage, (b) is a side view of the trapped body collided with boulders in the debris flow, and (c) is a side view of the captured body deformed or damaged. （ａ）は損傷部位の切断位置を示す捕捉体の側面図であり、（ｂ）は損傷部位の切断後の捕捉体の既設部分の側面図である。(A) is a side view of the capture body showing the cutting position of the damaged part, and (b) is a side view of the existing part of the capture body after cutting the damaged part. 捕捉体の既設部分への交換部材の設置を示す図である。It is a figure which shows the installation of the exchange member in the existing part of the capture body. （ａ）は補修構造体における調節部材の既設部分への取付けを説明する図であり、（ｂ）は補修構造体における環状部材の調節部材への載置を説明する図である。(A) is a diagram for explaining attachment of the adjusting member to the existing portion in the repair structure, and (b) is a diagram for explaining the mounting of the annular member on the adjusting member in the repair structure. （ａ）は既設部分への交換部材の載置を説明する図であり、（ｂ）は環状部材の固定位置の位置決めを説明する図である。(A) is a diagram for explaining the placement of the replacement member on the existing portion, and (b) is a diagram for explaining the positioning of the fixed position of the annular member. （ａ）は裏当部材の固定を説明する図であり、（ｂ）は調節部材の取り外しを説明する図である。(A) is a diagram for explaining the fixing of the backing member, and (b) is a diagram for explaining the removal of the adjusting member. 損傷した捕捉体を有する堰堤の正面図である。It is a front view of a dam having a damaged trap.

本発明の好ましい実施の形態について、図面を参照しながら説明する。なお、以下に示す実施の形態は一つの例示であり、本発明の範囲において、種々の形態をとりうる。 A preferred embodiment of the present invention will be described with reference to the drawings. The embodiment shown below is an example, and various forms can be taken within the scope of the present invention.

図１は、補修された捕捉体を備える堰堤の正面図である。図２は補修後の捕捉体の側面図であり、（ａ）は図１のＩＩａにおける側面図であり、（ｂ）は図１のＩＩｂにおける側面図である。図３は、捕捉体の損傷部位の交換部材を示す図であり、（ａ）は正面図であり、（ｂ）は側面図である。図４は、補修構造体を説明するために、図１のＩＶ部分を拡大して示す図である。図５は、補修構造体における環状部材の斜視図である。 FIG. 1 is a front view of a dam provided with a repaired trap. 2A and 2B are side views of the captured body after repair, FIG. 2A is a side view of IIa of FIG. 1, and FIG. 2B is a side view of IIb of FIG. 3A and 3B are views showing a replacement member for a damaged portion of the trap, FIG. 3A is a front view, and FIG. 3B is a side view. FIG. 4 is an enlarged view showing the IV portion of FIG. 1 in order to explain the repair structure. FIG. 5 is a perspective view of the annular member in the repair structure.

＜堰堤の構成＞
まず、図１を用いて堰堤１の構成について説明する。堰堤１は、その底部が地盤に埋設されており、河川を横切るように河川の幅方向に沿って延在するように構築されている。堰堤１は、例えば、コンクリート又はソイルセメントによって構築されている。なお、堰堤１において、河川の上流側又は下流側に面する壁面を、複数の鋼製セグメントを連結することにより形成された鋼板壁とし、その内部にコンクリートやソイルセメントを充填してもよい。
堰堤１は、いわゆる透過型の堰堤であり、河川の上流から流れてくる流水を通す透過部２と、透過部２に設けられて流水を通すとともに土石及び流木を捕捉する捕捉体３とを備える。 <Structure of dam>
First, the configuration of the dam 1 will be described with reference to FIG. The bottom of the dam 1 is buried in the ground, and is constructed so as to extend along the width direction of the river so as to cross the river. The dam 1 is constructed of, for example, concrete or soil cement. In the dam 1, the wall surface facing the upstream side or the downstream side of the river may be a steel plate wall formed by connecting a plurality of steel segments, and concrete or soil cement may be filled therein.
The dam 1 is a so-called permeation type dam, and includes a permeation portion 2 for passing flowing water flowing from the upstream of a river, and a catching body 3 provided in the permeation portion 2 for passing running water and capturing earth and stone and driftwood. ..

（透過部）
透過部２は、図１に示すように、河川の岸にそれぞれ接続して上流からの土石及び流木の越流を阻止する一対の非越流部１１の間に形成されている。 (Transparent part)
As shown in FIG. 1, the permeation portion 2 is formed between a pair of non-overflow portions 11 that are connected to the banks of the river and prevent the overflow of earth and stone and driftwood from the upstream.

（捕捉体）
図１に示す捕捉体３は、想定外の径を有する礫や流木等の衝突によって破損等した損傷部位ＤＰ（図６（ｃ）参照）を、新たな部材（後述する交換部材６）と交換して補修したものである。捕捉体３は、堰堤１の延在方向、すなわち、河川の幅方向に沿って透過部２に設けられている。
捕捉体３は、複数の支柱３１と、支柱３１の間を延在する複数の梁３２と、補修部分４とを有する。 (Capture body)
In the trapping body 3 shown in FIG. 1, a damaged part DP (see FIG. 6C) damaged by a collision of gravel, driftwood, etc. having an unexpected diameter is replaced with a new member (replacement member 6 described later). It was repaired. The catching body 3 is provided in the transmission portion 2 along the extending direction of the dam 1, that is, the width direction of the river.
The catching body 3 has a plurality of columns 31, a plurality of beams 32 extending between the columns 31, and a repair portion 4.

［支柱及び梁］
支柱３１は、例えば鋼管から形成されており、堰堤１の延在方向に沿って所定の間隔をおいて透過部２の底部に立設されている。支柱３１は、図２（ａ）に示すように、上流側に立設された上流側支柱３１ａと、下流側に立設された下流側支柱３１ｂとを有する。上流側支柱３１ａ及び下流側支柱３１ｂは互いに連結されている。上流側支柱３１ａは、上流側から下流側へ向かって斜め上方に延在し、下流側支柱３１ｂは、下流側から上流側に向かって斜め上方に延在している。 [Struts and beams]
The columns 31 are formed of, for example, steel pipes, and are erected at the bottom of the transmission portion 2 at predetermined intervals along the extending direction of the dam 1. As shown in FIG. 2A, the support column 31 has an upstream side support column 31a erected on the upstream side and a downstream side support column 31b erected on the downstream side. The upstream support column 31a and the downstream side column 31b are connected to each other. The upstream support column 31a extends diagonally upward from the upstream side to the downstream side, and the downstream support column 31b extends diagonally upward from the downstream side to the upstream side.

図１に戻って、上流側支柱３１ａは、堰堤１の高さ方向において上側から下側にわたって堰堤１の延在方向に延びる梁部３１ｃを複数有する。隣接する上流側支柱３１ａの梁部３１ｃ同士を互いに連結することで梁３２が形成される。より具体的には、各梁部３１ｃの先端にはフランジ部（連結部）Ｆが設けられており、隣接する梁部３１ｃのフランジ部Ｆを互いに連結することで梁３２が形成される。 Returning to FIG. 1, the upstream support column 31a has a plurality of beam portions 31c extending in the extending direction of the dam 1 from the upper side to the lower side in the height direction of the dam 1. The beam 32 is formed by connecting the beam portions 31c of the adjacent upstream support columns 31a to each other. More specifically, a flange portion (connecting portion) F is provided at the tip of each beam portion 31c, and the beam 32 is formed by connecting the flange portions F of the adjacent beam portions 31c to each other.

下流側支柱３１ｂは、図２（ａ）に示すように、上端部において上流側支柱３１ａと連結されている。また、下流側支柱３１ｂは、中間部において河川の通流方向に延びている連結梁３３を介して上流側支柱３１ａに連結されている。連結梁３３は、上流側支柱３１ａの中間部から下流側に延びる連結梁部３３ａと、下流側支柱３１ｂの中間部から上流側に延びる連結梁部３３ｂとが、それぞれの連結梁部３３ａ，３３ｂが有するフランジ部Ｆを介して互いに連結されることで形成される。
なお、図２（ｂ）に示すように、捕捉体３の延在方向において、上流側支柱３１ａに下流側支柱３１ｂが連結されていない箇所もあり、例えば、下流側支柱３１ｂは、上流側支柱３１ａに１つおきに連結されている。 As shown in FIG. 2A, the downstream support column 31b is connected to the upstream support column 31a at the upper end portion. Further, the downstream support column 31b is connected to the upstream side support column 31a via a connecting beam 33 extending in the flow direction of the river in the intermediate portion. In the connecting beam 33, the connecting beam portion 33a extending from the intermediate portion of the upstream side strut 31a to the downstream side and the connecting beam portion 33b extending from the intermediate portion of the downstream side strut 31b to the upstream side are the connecting beam portions 33a and 33b, respectively. It is formed by being connected to each other via a flange portion F having the same.
As shown in FIG. 2B, in the extending direction of the catching body 3, there is a place where the downstream support column 31b is not connected to the upstream side support column 31a. For example, the downstream side support column 31b is an upstream side support column. Every other 31a is connected.

［補修部分］
図１において二点鎖線で囲んだ補修部分４は、捕捉体３が変形や破損した損傷部位ＤＰ（図６（ｃ）参照）に代えて交換部材６を捕捉体３の既設部分５に固定した部分である。ここで「既設部分」とは、損傷部位ＤＰを除去した後の捕捉体３の残りの部分であり、堰堤１の構築時から透過部２に設置されている捕捉体３の部分である。また、既設部分５は、全く変形していない部分か、又は変形が軽微な部分である。 [Repair part]
In the repair portion 4 surrounded by the alternate long and short dash line in FIG. 1, the replacement member 6 is fixed to the existing portion 5 of the capture body 3 in place of the damaged portion DP (see FIG. 6 (c)) in which the capture body 3 is deformed or damaged. It is a part. Here, the "existing portion" is the remaining portion of the capture body 3 after the damaged portion DP is removed, and is the portion of the capture body 3 that has been installed in the transmission portion 2 since the construction of the dam 1. Further, the existing portion 5 is a portion that is not deformed at all or a portion that is slightly deformed.

交換部材６は捕捉体３の損傷部位ＤＰと交換されるものである。図３（ａ）に示すように、交換部材６は、複数の支柱部６１と複数の梁部６２とが一体に形成されたものである。つまり、交換部材６は、交換前の捕捉体３のように支柱３１同士を互いにフランジ部Ｆを介して連結させて梁３２を形成するものではない。
支柱部６１は、図３（ｂ）に示すように、上流側支柱部６１ａ及び下流側支柱部６１ｂを有する。下流側支柱部６１ｂの上端部は上流側支柱部６１ａに一体に連結されている。 The replacement member 6 is replaced with the damaged portion DP of the capture body 3. As shown in FIG. 3A, the replacement member 6 is formed by integrally forming a plurality of strut portions 61 and a plurality of beam portions 62. That is, the replacement member 6 does not form the beam 32 by connecting the columns 31 to each other via the flange portion F as in the catching body 3 before replacement.
As shown in FIG. 3B, the strut portion 61 has an upstream strut portion 61a and a downstream strut portion 61b. The upper end of the downstream support column 61b is integrally connected to the upstream support column 61a.

上流側支柱部６１ａは、捕捉体３の既設部分５の上流側支柱３１ａと固定される箇所に固定部分６３を有する。固定部分６３は、環状部６３ａと円筒部６３ｂとを有する。環状部６３ａは、上流側支柱部６１ａの外周面から径方向外側に突出している。
円筒部６３ｂは、図４に示すように、上流側支柱部６１ａの下端に位置し、環状部６３ａに一体に連結されている。交換部材６の最大の内径は、既設部分５の上流側支柱３１ａの外周面に対する環状部材８の固定位置よりも切断位置側にある、上流側支柱３１ａの外径より大きい。つまり、交換部材６の円筒部６３ｂは、既設部分５の上流側支柱３１ａの外径よりも大きい外径を有する。 The upstream support column 61a has a fixing portion 63 at a position where the catch body 3 is fixed to the upstream support column 31a of the existing portion 5. The fixed portion 63 has an annular portion 63a and a cylindrical portion 63b. The annular portion 63a projects radially outward from the outer peripheral surface of the upstream support column portion 61a.
As shown in FIG. 4, the cylindrical portion 63b is located at the lower end of the upstream support column portion 61a and is integrally connected to the annular portion 63a. The maximum inner diameter of the replacement member 6 is larger than the outer diameter of the upstream support column 31a located on the cutting position side of the fixed position of the annular member 8 with respect to the outer peripheral surface of the upstream support column 31a of the existing portion 5. That is, the cylindrical portion 63b of the replacement member 6 has an outer diameter larger than the outer diameter of the upstream support column 31a of the existing portion 5.

交換部材６の梁部６２は、捕捉体３の既設部分５における上流側支柱３１ａの梁部３１ｃと固定される箇所に固定部分６４を有する。固定部分６４の構成は、上流側支柱部６１ａの固定部分６３と同じであるため説明を省略する。 The beam portion 62 of the replacement member 6 has a fixing portion 64 at a position fixed to the beam portion 31c of the upstream support column 31a in the existing portion 5 of the catching body 3. Since the configuration of the fixed portion 64 is the same as that of the fixed portion 63 of the upstream support column portion 61a, the description thereof will be omitted.

下流側支柱部６１ｂは、捕捉体３の既設部分５における下流側支柱３１ｂと固定される箇所に固定部分６５を有する。固定部分６５の構成は、上流側支柱部６１ａの固定部分６３と同じであるため説明を省略する。 The downstream support column 61b has a fixing portion 65 at a position fixed to the downstream support column 31b in the existing portion 5 of the capture body 3. Since the configuration of the fixed portion 65 is the same as that of the fixed portion 63 of the upstream support column portion 61a, the description thereof will be omitted.

＜補修構造体＞
図４及び図５によって捕捉体３の補修に用いる補修構造体７の構成を説明する。図４は、補修構造体の構成を説明するための拡大図である。図５は、補修構造体における環状部材の斜視図である。補修構造体７は、図４に示すように、上記の交換部材６と、環状部材８と、調節部材９とを備える。 <Repair structure>
The configuration of the repair structure 7 used for repairing the capture body 3 will be described with reference to FIGS. 4 and 5. FIG. 4 is an enlarged view for explaining the configuration of the repair structure. FIG. 5 is a perspective view of the annular member in the repair structure. As shown in FIG. 4, the repair structure 7 includes the above-mentioned replacement member 6, the annular member 8, and the adjusting member 9.

（環状部材）
環状部材８は、円板状に形成されており、その中心に既設部分５の支柱３１又は梁３２を挿通させる孔８０が形成されている。環状部材８は、損傷部位ＤＰを除去した捕捉体３における支柱３１及び梁３２の少なくとも一方の既設部分５の外周面に固定されるものである。環状部材８は、既設部分５に取り付けた状態において、既設部分５の上流側支柱３１ａの外周面から径方向外側に向かって突出している。環状部材８は、既設部分５の外周面への固定前に、既設部分５の外周面に対して調節部材９に仮置きされる。環状部材８は、調節部材９に仮置きされた状態において既設部分５の外周面に対して移動可能である。環状部材８が既設部分５の外周面に固定された状態で、環状部材８の表面に交換部材６が固定される。 (Annual member)
The annular member 8 is formed in a disk shape, and a hole 80 through which the support column 31 or the beam 32 of the existing portion 5 is inserted is formed in the center thereof. The annular member 8 is fixed to the outer peripheral surface of at least one existing portion 5 of the support column 31 and the beam 32 in the capture body 3 from which the damaged portion DP has been removed. The annular member 8 projects radially outward from the outer peripheral surface of the upstream support column 31a of the existing portion 5 in a state of being attached to the existing portion 5. The annular member 8 is temporarily placed on the adjusting member 9 with respect to the outer peripheral surface of the existing portion 5 before being fixed to the outer peripheral surface of the existing portion 5. The annular member 8 is movable with respect to the outer peripheral surface of the existing portion 5 in a state of being temporarily placed on the adjusting member 9. The replacement member 6 is fixed to the surface of the annular member 8 in a state where the annular member 8 is fixed to the outer peripheral surface of the existing portion 5.

図５に示すように、環状部材８の内周縁は、交換部材６が固定される表面８１から裏面８２に向かって縮径していくテーパ部（開先）８３を有している。また、環状部材８が既設部分５の外周面に固定された状態において、環状部材８の裏面８２には、裏面８２に当接して既設部分５の外周面に固定される裏当部材８４が設けられている。裏当部材８４は、帯状の金属板により形成されている。 As shown in FIG. 5, the inner peripheral edge of the annular member 8 has a tapered portion (groove) 83 whose diameter is reduced from the front surface 81 to which the replacement member 6 is fixed toward the back surface 82. Further, in a state where the annular member 8 is fixed to the outer peripheral surface of the existing portion 5, the back surface 82 of the annular member 8 is provided with a backing member 84 that abuts on the back surface 82 and is fixed to the outer peripheral surface of the existing portion 5. Has been done. The backing member 84 is formed of a strip-shaped metal plate.

（調節部材）
図４に示すように、調節部材９は、環状部材８を裏面８２側から支持し、既設部分５の上流側支柱３１ａの外周面に対する環状部材８の固定位置を、上流側支柱３１ａの軸線方向に沿って高さｈ方向に調節するものである。調節部材９は、環状部材８の裏面８２側で、上流側支柱３１ａの外周面に着脱自在に設けられている。
調節部材９は、分割片９０と、磁石９１と、支持部９２とを備えている。 (Adjusting member)
As shown in FIG. 4, the adjusting member 9 supports the annular member 8 from the back surface 82 side, and the fixed position of the annular member 8 with respect to the outer peripheral surface of the upstream column 31a of the existing portion 5 is set in the axial direction of the upstream column 31a. The height is adjusted in the h direction along the above. The adjusting member 9 is detachably provided on the outer peripheral surface of the upstream support column 31a on the back surface 82 side of the annular member 8.
The adjusting member 9 includes a split piece 90, a magnet 91, and a support portion 92.

分割片９０は、例えば、中心に孔が形成された円板を半分に割って形成されている。分割片９０は、それぞれ内周縁が既設部分５の外周面に沿うように形成されている。分割片９０は、その面が既設部分５の支柱３１又は梁３２の軸線に交差（直交）するように、既設部分５の外周面に取り付けられる。分割片９０は、互いの端部同士が対向するように既設部分５に取り付けられ、取り付けた際に、平面視略環状となっている。
磁石９１は、分割片９０を下方から支持すると共に、磁力によって分割片９０を既設部分５に固定する。磁石９１は、既設部分５の外周面に取り付けられ、交換部材６を既設部分５に固定された後に取り外される。磁石９１は、分割片９０と同様に半円状に形成してもよいし、分割片９０の下方で所定間隔をおいて取り付けるようにしてもよい。また、分割片９０と磁石９１は一体に形成されていてもよい。
支持部９２は、分割片９０の表面から裏面を貫通するように設けられている。支持部９２は、互いに所定間隔をおいて（例えば４５°、６０°、９０°又は１８０°おき）分割片９０に配置されている。支持部９２は、頭部のないボルト９２ａとナット９２ｂとを備えている。ボルト９２ａは、軸方向のほぼ全域にわたってネジ溝が形成されており、分割片９０に挿通されている。ナット９２ｂは、二つ設けられており、一方は分割片９０の上方でボルト９２ａに螺合され、他方は分割片９０の下方でボルト９２ａに螺合されている。すなわち、両ナット９２ｂのボルト９２ａへの螺合位置を変えることにより、ボルト９２ａの分割片９０からの突出量を調節することができる。ボルト９２ａの上端で環状部材８を支持し、ボルト９２ａの分割片９０への固定位置の調節により、既設部分５の外周面に対する環状部材８の高さｈ方向の位置を調節することができる。 The divided piece 90 is formed, for example, by dividing a disk having a hole in the center in half. Each of the divided pieces 90 is formed so that the inner peripheral edge thereof follows the outer peripheral surface of the existing portion 5. The split piece 90 is attached to the outer peripheral surface of the existing portion 5 so that its surface intersects (orthogonally) the axis of the support column 31 or the beam 32 of the existing portion 5. The divided pieces 90 are attached to the existing portion 5 so that their ends face each other, and when attached, they form a substantially annular shape in a plan view.
The magnet 91 supports the split piece 90 from below and fixes the split piece 90 to the existing portion 5 by magnetic force. The magnet 91 is attached to the outer peripheral surface of the existing portion 5, and is removed after the replacement member 6 is fixed to the existing portion 5. The magnet 91 may be formed in a semicircular shape like the divided piece 90, or may be attached below the divided piece 90 at a predetermined interval. Further, the divided piece 90 and the magnet 91 may be integrally formed.
The support portion 92 is provided so as to penetrate the back surface of the divided piece 90 from the front surface. The support portions 92 are arranged on the divided pieces 90 at predetermined intervals (for example, every 45 °, 60 °, 90 ° or 180 °). The support portion 92 includes a headless bolt 92a and a nut 92b. The bolt 92a has a thread groove formed over substantially the entire axial direction, and is inserted into the split piece 90. Two nuts 92b are provided, one screwed onto the bolt 92a above the split piece 90 and the other screwed into the bolt 92a below the split piece 90. That is, the amount of protrusion of the bolt 92a from the split piece 90 can be adjusted by changing the screwing position of both nuts 92b to the bolt 92a. The annular member 8 is supported by the upper end of the bolt 92a, and the position of the annular member 8 in the height h direction with respect to the outer peripheral surface of the existing portion 5 can be adjusted by adjusting the fixing position of the bolt 92a to the divided piece 90.

＜補修方法＞
次に、図６〜図１１を用いて捕捉体３の補修方法を説明する。図６（ａ）は損傷前の捕捉体の側面図であり、図６（ｂ）は土石流中の巨礫が衝突した捕捉体の側面図であり、図６（ｃ）は変形又は損傷した捕捉体の側面図である。図７（ａ）は、損傷部位の切断位置を示す捕捉体の側面図であり、図７（ｂ）は、損傷部位の切断後の捕捉体の既設部分の側面図である。図８は、捕捉体の既設部分への交換部材の設置を示す図である。図９（ａ）は、補修構造体における調節部材の既設部分への取付けを説明する図であり、図９（ｂ）は、補修構造体における環状部材の調節部材への載置を説明する図である。図１０（ａ）は、交換部材が環状部材に仮置きされた状態を示し、図１０（ｂ）は、調節部材による環状部材の位置決めを説明するための図である。図１１（ａ）は、裏当部材が固定された状態を示す図であり、図１１（ｂ）は、調節部材が取り外されて捕捉体の補修が完了した状態を示す図である。 <Repair method>
Next, a method of repairing the capture body 3 will be described with reference to FIGS. 6 to 11. FIG. 6A is a side view of the trapped body before damage, FIG. 6B is a side view of the trapped body collided with boulders in a debris flow, and FIG. 6C is a deformed or damaged trapped body. It is a side view of. FIG. 7A is a side view of the capture body showing the cutting position of the damaged portion, and FIG. 7B is a side view of the existing portion of the capture body after cutting the damaged portion. FIG. 8 is a diagram showing the installation of the replacement member on the existing portion of the capture body. FIG. 9A is a diagram illustrating attachment of the adjusting member to the existing portion of the repair structure, and FIG. 9B is a diagram illustrating mounting of the annular member on the adjusting member in the repair structure. Is. FIG. 10A shows a state in which the replacement member is temporarily placed on the annular member, and FIG. 10B is a diagram for explaining positioning of the annular member by the adjusting member. FIG. 11A is a diagram showing a state in which the backing member is fixed, and FIG. 11B is a diagram showing a state in which the adjusting member is removed and the repair of the catching body is completed.

図６（ａ）〜（ｃ）に示すように、例えば想定外の礫径を有する岩石Ｒが上流から流されてきて、捕捉体３の上流側支柱３１ａ及び梁３２に衝突した場合、衝突により形成された損傷部位ＤＰを有する捕捉体３を補修する必要がある。 As shown in FIGS. 6A to 6C, for example, when a rock R having an unexpected gravel diameter is washed away from the upstream and collides with the upstream support column 31a and the beam 32 of the capture body 3, the collision causes the rock R. It is necessary to repair the capture body 3 having the formed damage site DP.

まず、損傷部位ＤＰを捕捉体３から切断する位置を決める。一点鎖線によって示す切断位置は、図７（ａ）に示すように、捕捉体３において損傷又は変形していない部分、若しくは損傷又は変形が軽微な部分に設定される。切断位置は、支柱３１又は梁３２のフランジ部Ｆ（連結部）以外の箇所に設定される。図７（ｂ）に示すように、切断位置において捕捉体３の損傷部位ＤＰを含む部分を切断して除去する。除去後、捕捉体３の既設部分５の形状を測量する。 First, the position where the damaged site DP is cut from the capture body 3 is determined. As shown in FIG. 7A, the cutting position indicated by the alternate long and short dash line is set to a portion of the trap 3 that is not damaged or deformed, or a portion that is slightly damaged or deformed. The cutting position is set at a position other than the flange portion F (connecting portion) of the support column 31 or the beam 32. As shown in FIG. 7B, the portion of the capture body 3 including the damaged portion DP is cut and removed at the cutting position. After removal, the shape of the existing portion 5 of the capture body 3 is surveyed.

次いで、測量によって得られた情報に基づいて損傷部位ＤＰに取り付ける交換部材６を用意する（図８参照）。捕捉体３の既設部分５に交換部材６を固定する前に、磁石９１を介して既設部分５の外周面に分割片９０及び支持部９２を取り付ける。
図９を用いて調節部材９による環状部材８の固定位置の調節方法について説明する。なお、図９においては、捕捉体３の上流側支柱３１ａの外周面に取り付けられた調節部材９を示すが、既設部分５の下流側支柱３１ｂへの固定、及び既設部分５の梁部３１ｃへの固定についても同様の方法を適用することができる。 Next, a replacement member 6 to be attached to the damaged site DP is prepared based on the information obtained by the survey (see FIG. 8). Before fixing the replacement member 6 to the existing portion 5 of the capture body 3, the split piece 90 and the support portion 92 are attached to the outer peripheral surface of the existing portion 5 via the magnet 91.
A method of adjusting the fixed position of the annular member 8 by the adjusting member 9 will be described with reference to FIG. Note that FIG. 9 shows the adjusting member 9 attached to the outer peripheral surface of the upstream support column 31a of the capture body 3, but the existing portion 5 is fixed to the downstream support column 31b and the existing portion 5 is attached to the beam portion 31c. The same method can be applied to the fixation of.

図９（ａ）に示すように、調節部材９の各分割片９０を、上流側支柱３１ａの外周面に磁石９１を介して取り付けることで、上流側支柱３１ａの外周面を分割片９０で取り囲んだ状態となる。
次いで、図９（ｂ）に示すように、環状部材８を調節部材９の支持部９２の上に載置する。具体的には、ボルト９２ａが、環状部材８をその裏面８２から支持する。この状態において、環状部材８は、調節部材９の支持部９２に仮置きした状態にあり、上流側支柱３１ａの外周面に対して移動可能である。 As shown in FIG. 9A, each divided piece 90 of the adjusting member 9 is attached to the outer peripheral surface of the upstream side column 31a via a magnet 91, so that the outer peripheral surface of the upstream side column 31a is surrounded by the divided piece 90. It will be in a state.
Next, as shown in FIG. 9B, the annular member 8 is placed on the support portion 92 of the adjusting member 9. Specifically, the bolt 92a supports the annular member 8 from its back surface 82. In this state, the annular member 8 is temporarily placed on the support portion 92 of the adjusting member 9, and can move with respect to the outer peripheral surface of the upstream support column 31a.

次いで、環状部材８に載置した交換部材６の、既設部分５に対する固定位置を調整して決定する。以下に、具体的に説明する。
図１０（ａ）に示すように、支持部９２上に仮置きされた状態にある環状部材８の表面８１に、クレーン等によって吊られた状態で交換部材６を載置（仮置き）する。交換部材６が固定部分６３の円筒部６３ｂで環状部材８に載置された状態において、調節部材９によって環状部材８の位置（姿勢）を調節する。
図３（ａ）に示すように３つの上流側支柱部６１ａを有する交換部材６を用いて捕捉体３を補修する場合、３つ全ての上流側支柱部６１ａの円筒部６３ｂが全周にわたって、対応する環状部材８の表面８１に接触するようにそれぞれの環状部材８の位置（姿勢）を調節する。例えば、２つの上流側支柱部６１ａの円筒部６３ｂが全周にわたって、対応する環状部材８の表面８１に接触している場合であっても、図１０（ａ）に示すように、残りの１つの上流側支柱部６１ａの円筒部６３ｂが、環状部材８の表面８１に部分的に接触していないこともある。
このような場合に、図１０（ｂ）に示すように、調節部材９のボルト９２ａを環状部材８に対して進退させて、上流側支柱部６１ａの円筒部６３ｂが環状部材８の表面８１に全周にわたって接触するように、既設部分５の上流側支柱３１ａの外周面に対する環状部材８の溶接（固定）位置及び溶接（固定）姿勢を調節する。こうして、上流側支柱３１ａの外周面における環状部材８の固定位置が決定される。 Next, the fixed position of the replacement member 6 placed on the annular member 8 with respect to the existing portion 5 is adjusted and determined. The details will be described below.
As shown in FIG. 10A, the replacement member 6 is placed (temporarily placed) on the surface 81 of the annular member 8 which is temporarily placed on the support portion 92 while being suspended by a crane or the like. The position (posture) of the annular member 8 is adjusted by the adjusting member 9 in a state where the replacement member 6 is placed on the annular member 8 by the cylindrical portion 63b of the fixed portion 63.
When the catching body 3 is repaired by using the replacement member 6 having three upstream support columns 61a as shown in FIG. 3A, the cylindrical portions 63b of all three upstream support columns 61a cover the entire circumference. The position (posture) of each annular member 8 is adjusted so as to come into contact with the surface 81 of the corresponding annular member 8. For example, even when the cylindrical portion 63b of the two upstream strut portions 61a is in contact with the surface 81 of the corresponding annular member 8 over the entire circumference, as shown in FIG. 10A, the remaining 1 The cylindrical portion 63b of the upstream strut portion 61a may not partially contact the surface 81 of the annular member 8.
In such a case, as shown in FIG. 10B, the bolt 92a of the adjusting member 9 is advanced and retracted with respect to the annular member 8, and the cylindrical portion 63b of the upstream support column portion 61a is brought to the surface 81 of the annular member 8. The welding (fixing) position and welding (fixing) posture of the annular member 8 with respect to the outer peripheral surface of the upstream support column 31a of the existing portion 5 are adjusted so as to make contact over the entire circumference. In this way, the fixed position of the annular member 8 on the outer peripheral surface of the upstream support column 31a is determined.

さらに、環状部材８に載置した交換部材６を、その軸心ｘ１が既設部分５の上流側支柱３１ａの軸心ｘ２に近づくように環状部材８上で移動させる。こうして、環状部材８における交換部材６の溶接（固定）位置が決定される。 Further, the replacement member 6 placed on the annular member 8 is moved on the annular member 8 so that the axial center x1 thereof approaches the axial center x2 of the upstream support column 31a of the existing portion 5. In this way, the welding (fixing) position of the replacement member 6 in the annular member 8 is determined.

次いで、図１１（ａ）に示すように、環状部材８の裏面８２側に当接した状態で、既設部分５の上流側支柱３１ａの外周面に裏当部材８４を、例えば溶接によって固定する。裏当部材８４の固定により、環状部材８は上流側支柱３１ａの外周面の固定位置に確実に保持される。また、環状部材８に仮置きされた交換部材６を環状部材８から一度取り外す前に、環状部材８に対する交換部材６の固定位置にマーキングＭを施しておくことが好ましい。 Next, as shown in FIG. 11A, the backing member 84 is fixed to the outer peripheral surface of the upstream support column 31a of the existing portion 5 by welding, for example, in a state of being in contact with the back surface 82 side of the annular member 8. By fixing the backing member 84, the annular member 8 is securely held at the fixed position on the outer peripheral surface of the upstream support column 31a. Further, it is preferable that the marking M is applied to the fixed position of the replacement member 6 with respect to the annular member 8 before the replacement member 6 temporarily placed on the annular member 8 is once removed from the annular member 8.

次いで、交換部材６を環状部材８から取り外し、環状部材８を上流側支柱３１ａの外周面に、捕捉体３の上方から溶接して固定する。具体的には、環状部材８の溶接は、テーパ部８３において表面８１側から裏面８２及び裏当部材８４に向かって施される。
環状部材８の溶接後に、交換部材６を環状部材８の表面８１にマーキングＭに基づいて再度載置して溶接する。これにより、交換部材６の捕捉体３の既設部分５への固定が完了する。
最後に、図１１（ｂ）に示すように、調節部材９を既設部分５の上流側支柱３１ａの外周面から取り外すことで、捕捉体３の補修は完了する。 Next, the replacement member 6 is removed from the annular member 8, and the annular member 8 is welded and fixed to the outer peripheral surface of the upstream support column 31a from above the trapping body 3. Specifically, the annular member 8 is welded from the front surface 81 side toward the back surface 82 and the backing member 84 in the tapered portion 83.
After welding the annular member 8, the replacement member 6 is placed again on the surface 81 of the annular member 8 based on the marking M and welded. As a result, the fixing of the replacement member 6 to the existing portion 5 of the catching body 3 is completed.
Finally, as shown in FIG. 11B, the repair of the catching body 3 is completed by removing the adjusting member 9 from the outer peripheral surface of the upstream support column 31a of the existing portion 5.

以上のように、既設部分５に交換部材６を直接溶接して固定するのではなく、捕捉体３の既設部分５に環状部材８を介して交換部材６を固定するので、捕捉体３を簡単に補修することができ、補修に係るコストを抑えることができる。特に、捕捉体３の既設部分５が変形していた場合には、補修作業が極めて容易になる。 As described above, instead of directly welding and fixing the replacement member 6 to the existing portion 5, the replacement member 6 is fixed to the existing portion 5 of the capture body 3 via the annular member 8, so that the capture body 3 can be easily simplified. It can be repaired and the cost related to the repair can be suppressed. In particular, when the existing portion 5 of the capture body 3 is deformed, the repair work becomes extremely easy.

また、一度交換部材６を環状部材８に仮置きした状態で、交換部材６の円筒部６３ｂが環状部材８の表面８１に全周にわたって接触するように、既設部分５の上流側支柱３１ａの外周面に対する環状部材８の固定位置を移動可能に決めることができる。これにより、既設部分５が初期の設計状態から変位（変形）している場合であっても、交換部材６の上流側支柱部６１ａの軸心ｘ１と、既設部分５の上流側支柱３１ａの軸心ｘ２のずれ（変位）を許容しつつ交換部材６を捕捉体３の既設部分５に適切に固定することができる。さらに、環状部材８の固定位置は、調節部材９のボルト９２ａ及びナット９２ｂによって調節するので、既設部分５の外周面に対する環状部材８の姿勢を含み固定位置を精度よく設定することができる。
また、交換部材６は、環状部材８に固定される前に環状部材８に仮置きされるので、例えば既設部分５の軸心ｘ２と、交換部材６の上流側支柱部６１ａの軸心ｘ１とを、既設部分５の径方向において互いに近づくように調整することができる。 Further, once the replacement member 6 is temporarily placed on the annular member 8, the outer circumference of the upstream support column 31a of the existing portion 5 is provided so that the cylindrical portion 63b of the replacement member 6 comes into contact with the surface 81 of the annular member 8 over the entire circumference. The fixed position of the annular member 8 with respect to the surface can be movably determined. As a result, even when the existing portion 5 is displaced (deformed) from the initial design state, the axis x1 of the upstream support column portion 61a of the replacement member 6 and the shaft of the upstream support column 31a of the existing portion 5 The replacement member 6 can be appropriately fixed to the existing portion 5 of the capture body 3 while allowing the displacement (displacement) of the core x2. Further, since the fixing position of the annular member 8 is adjusted by the bolt 92a and the nut 92b of the adjusting member 9, the fixing position can be accurately set including the posture of the annular member 8 with respect to the outer peripheral surface of the existing portion 5.
Further, since the replacement member 6 is temporarily placed on the annular member 8 before being fixed to the annular member 8, for example, the axial center x2 of the existing portion 5 and the axial center x1 of the upstream support column portion 61a of the replacement member 6 Can be adjusted so as to approach each other in the radial direction of the existing portion 5.

また、捕捉体３の損傷していない又は変形が少ない既設部分５において損傷部位ＤＰを切断するので、交換部材６を交換部材６の既設部分５に対して精度の高い固定が可能になる。 Further, since the damaged portion DP is cut at the existing portion 5 of the catching body 3 which is not damaged or has little deformation, the replacement member 6 can be fixed to the existing portion 5 of the replacement member 6 with high accuracy.

また、環状部材８の裏面８２に当接した状態で、裏当部材８４を既設部分５の外周面に固定するので、上方から、つまり環状部材８の表面８１側からテーパ部８３において環状部材８を既設部分５の外周面に溶接することができる。これにより、環状部材８の溶接作業が容易になるとともに、溶接の精度が高まる。 Further, since the backing member 84 is fixed to the outer peripheral surface of the existing portion 5 in a state of being in contact with the back surface 82 of the annular member 8, the annular member 8 is formed in the tapered portion 83 from above, that is, from the surface 81 side of the annular member 8. Can be welded to the outer peripheral surface of the existing portion 5. This facilitates the welding work of the annular member 8 and enhances the welding accuracy.

また、環状部材８に交換部材６を取り付ける位置にマーキングＭを施すことにより、環状部材８を既設部分５の外周面に固定した後に、交換部材６を環状部材８に迅速かつ正確に載置することができる。 Further, by marking the position where the replacement member 6 is attached to the annular member 8, after fixing the annular member 8 to the outer peripheral surface of the existing portion 5, the replacement member 6 is quickly and accurately placed on the annular member 8. be able to.

また、交換部材６の円筒部６３ｂの内径は既設部分５の外径よりも大きいので、交換部材６の既設部分５との連結部分は、補修前以上の強度を発揮することができる。 Further, since the inner diameter of the cylindrical portion 63b of the replacement member 6 is larger than the outer diameter of the existing portion 5, the connecting portion of the replacement member 6 with the existing portion 5 can exhibit strength higher than that before the repair.

１堰堤
２透過部
３捕捉体
３１支柱
３１ａ上流側支柱
３１ｂ下流側支柱
３１ｃ梁部
３２梁
４補修部分
５既設部分
６交換部材
６１支柱部
６１ａ上流側支柱部
６１ｂ下流側支柱部
６２梁部
６３，６４，６５固定部分
６３ａ環状部
６３ｂ円筒部
７補修構造体
８環状部材
８０孔
８１表面
８２裏面
８３テーパ部
８４裏当部材
９調節部材
９０分割片
９１磁石
９２支持部
９２ａボルト
９２ｂナット
ＤＰ損傷部位
Ｍマーキング
Ｒ岩石 1 Dam 2 Permeation part 3 Capture body 31 Support column 31a Upstream side support column 31b Downstream side support column 31c Beam part 32 Beam 4 Repair part 5 Existing part 6 Replacement member 61 Support part 61a Upstream side support part 61b Downstream side support part 62 Beam part 63, 64, 65 Fixed part 63a Ring part 63b Cylindrical part 7 Repair structure 8 Ring member 80 Hole 81 Front side 82 Back side 83 Tapered part 84 Backing member 9 Adjusting member 90 Divided piece 91 Magnet 92 Support part 92a Bolt 92b Nut DP Damaged part M Marking R rock

Claims

It is a method of repairing a trap that is equipped with columns and beams to allow running water flowing from the upstream of the river to pass through and to capture earth and stone and driftwood.
The step of cutting and removing the damaged part of the trap, and
A split piece attached to the outer peripheral surface of at least one existing portion of the support column and the beam of the capture body from which the damaged portion has been removed, and a split piece that penetrates the split piece and is movably provided with respect to the split piece. A step of providing an adjusting member having a support portion in the existing portion, and
The outer circumferential surface of the existing portion, a step of Ru mounting the movable annular member via the adjusting member relative to the outer peripheral surface,
A step of placing a replacement member to be replaced with the damaged portion on the annular member, and
A step of adjusting and determining a fixed position of the replacement member placed on the annular member with respect to the existing portion, and
A step of fixing the annular member to the existing portion at the fixed position of the replacement member with respect to the existing portion.
A step of fixing the replacement member to the annular member fixed to the existing portion, and
Including
In a state where the annular member is temporarily placed at the end of the support portion on the side on which the replacement member is placed, the annular member is provided with respect to the existing portion by adjusting the amount of protrusion of the support portion with respect to the divided piece. A method of repairing a trapped body, which comprises adjusting a fixed position .

It is a method of repairing a trap that is equipped with columns and beams, allows running water flowing from the upstream of the river to pass through, and captures earth and stone and driftwood.
The step of cutting and removing the damaged part of the trap, and
A split piece attached to the outer peripheral surface of at least one existing portion of the support column and the beam of the capture body from which the damaged portion has been removed, and a split piece that penetrates the split piece and is movably provided with respect to the split piece. A step of providing an adjusting member having a support portion in the existing portion, and
A step of attaching an annular member to the outer peripheral surface of the existing portion so as to be movable with respect to the outer peripheral surface via the adjusting member.
A step of placing a replacement member to be replaced with the damaged portion on the annular member, and
A step of adjusting and determining a fixed position of the replacement member placed on the annular member with respect to the existing portion, and
A step of fixing the annular member to the existing portion at the fixed position of the replacement member with respect to the existing portion.
A step of fixing the replacement member to the annular member fixed to the existing portion, and
A step of removing the adjusting member from the existing portion after fixing the replacement member to the existing portion.
Including
In a state where the annular member is temporarily placed at the end of the support portion on the side on which the replacement member is placed, the annular member is provided with respect to the existing portion by adjusting the amount of protrusion of the support portion with respect to the divided piece. A method of repairing a trapped body, which comprises adjusting a fixed position.

The method for repairing a captured body according to claim 1 or 2 , wherein the damaged portion is cut at an undamaged portion of the captured body.

The capture body is configured by connecting a plurality of columns and a plurality of beams.
The method for repairing a trapped body according to any one of claims 1 to 3 , wherein the damaged portion is cut at a portion other than the support column or the connecting portion of the beam.

Prior to the step of fixing the annular member to the existing portion, the existing portion has a strip shape on the outer peripheral surface of the existing portion in a state of being in contact with the back surface of the annular member opposite to the front surface of the replacement member. Fix the backing member by welding ,
The inner peripheral edge of the annular member has a tapered portion whose diameter is reduced from the front surface to which the replacement member is fixed toward the back surface, and the annular member is supported by the backing member and is tapered. The method for repairing a trapped body according to any one of claims 1 to 4 , wherein the portion is welded to the existing portion .

Repair of the catching body according to any one of claims 1 to 5 , wherein the replacement member placed on the annular member is removed before the step of fixing the annular member to the existing portion. Method.

The method for repairing a catching body according to claim 6 , further comprising marking the attachment position of the replacement member with respect to the annular member before the step of removing the replacement member from the annular member.

It is a repair structure equipped with columns and beams that allows running water flowing from the upstream of the river to pass through and repairs the damaged part of the trap that captures earth and stone and driftwood.
An annular member fixed to the outer peripheral surface of at least one existing portion of the support column and the beam in the capture body from which the damaged portion has been removed.
A replacement member fixed to the annular member and replaced with the damaged part,
A split piece attached to the outer peripheral surface of the existing portion, and a support portion that penetrates the split piece and is movably provided with respect to the split piece to support the annular member at an end portion facing the replacement member. And, with the adjusting member,
With
The adjusting member is a repair structure for a catching body, characterized in that the fixing position of the annular member with respect to the existing portion is adjusted by adjusting the amount of protrusion of the supporting portion with respect to the divided piece .

The repair structure for a catching body according to claim 8 , wherein the adjusting member is detachably provided with respect to the existing portion.

The capture according to claim 8 or 9 , further comprising a backing member fixed to the outer peripheral surface of the existing portion while contacting the back surface of the annular member on the side opposite to the surface facing the replacement member. Body repair structure.

The item according to any one of claims 8 to 10 , wherein the inner diameter of the replacement member is larger than the outer diameter of the existing portion on the cutting position side of the fixed position of the annular member with respect to the existing portion. Repair structure of the capture body.

The capture body according to any one of claims 8 to 11 , wherein the repair structure of the capture body is provided on the existing portion from which the damaged portion has been removed.

A dam according to claim 12 , wherein the trapping body is provided in a permeation portion through which running water passes.