JP5102243B2 - Box roof pipe joint structure - Google Patents

Box roof pipe joint structure Download PDF

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JP5102243B2
JP5102243B2 JP2009081322A JP2009081322A JP5102243B2 JP 5102243 B2 JP5102243 B2 JP 5102243B2 JP 2009081322 A JP2009081322 A JP 2009081322A JP 2009081322 A JP2009081322 A JP 2009081322A JP 5102243 B2 JP5102243 B2 JP 5102243B2
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box
roof
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shaped roof
tube
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JP2010229778A (en
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仁 藤田
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Okumura Corp
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本発明は、箱形ルーフ管の継手構造に関し、特に、箱形ルーフ工法において、到達立坑に押し出された単位箱形ルーフ管の解体撤去を容易にする、横方向ルーフ列と縦方向ルーフ列との接合角部分に配置された角部箱形ルーフ管と、これの側方及び下方に隣接する側方箱形ルーフ管及び下方箱形ルーフ管との間の継手部の継手構造に関する。   The present invention relates to a joint structure for a box-shaped roof pipe, and in particular, in a box-shaped roof construction method, a lateral roof line and a vertical roof line that facilitate dismantling and removal of a unit box-shaped roof pipe pushed out to a reach shaft. The present invention relates to a joint structure of a joint portion between a corner box-shaped roof pipe disposed at a joint corner portion, and a side box-shaped roof pipe and a lower box-shaped roof pipe adjacent to the side and the bottom of the corner box-shaped roof pipe.

例えば鉄道の軌条や道路の下方を横断するようにして、これらの鉄道や道路の使用状態を保持したまま函体構造物を地中に構築する工法として、箱形ルーフ工法が知られている(例えば、特許文献1、特許文献2参照)。箱形ルーフ工法は、設置される函体構造物の外周形状に沿って、好ましくは天井部及び両側の側壁部と対応する位置に、矩形断面を有する複数の箱形ルーフ管を、横方向及び縦方向に連設させて地中に先行設置しておき、横方向ルーフ列の上面や縦方向ルーフ列の側面に配置した縁切り板の端部を不動箇所に固定した状態で、既製の函体構造物の端面を縦方向ルーフ列及び横方向ルーフ列に当接させ、これらのルーフ列の内側の地盤を函体構造物の中空内部を介して撤去しつつ函体構造物を前進させることにより、函体構造物を箱形ルーフ管によるルーフ列と置換させて地中に設置するものである。   For example, a box-shaped roof construction method is known as a method of constructing a box structure in the ground while maintaining the state of use of these railroads and roads by crossing the railroad rails and roads below ( For example, see Patent Document 1 and Patent Document 2). The box-shaped roof construction method includes a plurality of box-shaped roof pipes having a rectangular cross section in the lateral direction and at positions corresponding to the ceiling portion and the side wall portions on both sides along the outer peripheral shape of the box structure to be installed. The box is ready-made in a state where it is connected in the vertical direction and installed in the ground in advance, and the edge of the edge cutting plate placed on the upper surface of the horizontal roof row or the side surface of the vertical roof row is fixed to the fixed position. By bringing the end face of the structure into contact with the longitudinal roof row and the lateral roof row and moving the box structure forward while removing the ground inside these roof rows through the hollow interior of the box structure The box structure is replaced with a roof row of box-shaped roof pipes and installed in the ground.

このような箱形ルーフ工法では、地中に先行設置される箱形ルーフ管は、複数の単位箱形ルーフ管を軸方向に後方から順次継ぎ足しながら発進立坑から到達立坑に向けて掘進させるようになっている。また、地中に先行設置された箱形ルーフ管は、函体構造物の前進に伴って到達立坑に押し出され、押し出された箱形ルーフ管は、単位箱形ルーフ管毎に到達立坑を介して撤去されることになる。さらに、到達立坑には、H形鋼、溝形鋼等を組み付けて、ルーフ受架台が設けられており、特に天井部に設置された箱形ルーフ管は、到達立坑に押し出された単位箱形ルーフ管をルーフ受架台で受けてから、解体撤去されるようになっている。   In such a box roof construction method, the box roof pipe installed in advance in the ground is made to dig a plurality of unit box roof pipes from the starting shaft to the reaching shaft while sequentially connecting the unit box roof tubes from the rear in the axial direction. It has become. In addition, the box-shaped roof pipe installed in advance in the ground is pushed out to the reaching shaft as the box structure advances, and the extruded box-shaped roof tube passes through the reaching shaft for each unit box-shaped roof tube. Will be removed. In addition, H-shaped steel, groove-shaped steel, etc. are assembled in the reaching shaft, and a roof cradle is provided. Especially, the box-shaped roof pipe installed on the ceiling is a unit box shape pushed out to the reaching shaft. The roof tube is received by the roof cradle, and then dismantled and removed.

そして、箱形ルーフ工法では、横方向又は縦方向に隣接する箱形ルーフ管の間の継手部は、隣接する一方の単位箱形ルーフ管の側面部に突出して設けられた複数の係合片と、他方の単位箱形ルーフ管の側面部に突出して設けられた複数の係合片とを係合することによって構成されており、このようなジャンクションと呼ばれる係合片による継手部に案内させて、隣接する一対の箱形ルーフ管が、これらの掘進作業中に横方向や縦方向への相対的な位置ずれを生じないようにする工夫がなされている。   In the box-type roof construction method, the joint portions between the box-shaped roof tubes adjacent in the horizontal direction or the vertical direction are provided with a plurality of engaging pieces protruding from the side surface of one of the adjacent unit box-shaped roof tubes. And a plurality of engaging pieces projecting from the side surface of the other unit box-type roof pipe are engaged with each other and guided to the joint portion by such an engaging piece called a junction. Thus, a device is devised to prevent a pair of adjacent box-shaped roof pipes from being displaced relative to each other in the horizontal direction or the vertical direction during the excavation work.

特公平4−32199号公報Japanese Examined Patent Publication No. 4-32199 特公平7−35719号公報Japanese Patent Publication No. 7-35719

しかしながら、隣接する箱形ルーフ管の間に、各側面部から突出する係合片による継手部が設けられていると、箱形ルーフ管が到達立坑に押し出されて単位箱形ルーフ管毎に撤去される際に、継手部の係合片が邪魔になって、単位箱形ルーフ管を撤去し難くなる場合がある。   However, if there are joints with engaging pieces protruding from each side between adjacent box-shaped roof pipes, the box-shaped roof pipe is pushed out to the reach shaft and removed for each unit box-shaped roof pipe. In doing so, the engagement piece of the joint part may become an obstacle, making it difficult to remove the unit box-shaped roof pipe.

すなわち、到達立坑が、例えば掘進方向に沿った長さが単位箱形ルーフ管の2倍を超える相当の大きさで形成されていて、到達立坑に押し出された単位箱形ルーフ管を、到達立坑の内部において隣接する箱形ルーフ管をかわせるように一本毎にさらに前方に引き出すことができれば、係合片による継手部の係合を長手方向に解除させてから単位箱形ルーフ管を吊り上げることが可能である。しかしながら、例えば用地買収や周囲の交通量等との関係で、到達立坑を自由な大きさで形成することができず、掘進方向に沿った長さが例えば単位箱形ルーフ管の長さよりも長く単位箱形ルーフ管の2倍の長さよりも短い程度の大きさでしか到達立坑を形成できない場合には、単位箱形ルーフ管を一本毎にさらに前方に引き出して、係合片による継手部の係合を長手方向に解除することは困難である。   That is, the reaching shaft is formed in a size that is considerably larger than, for example, twice the length of the unit box-shaped roof pipe along the direction of excavation, and the unit box-shaped roof tube extruded to the reaching shaft is If it can be pulled out forward one by one so that adjacent box-shaped roof pipes can be moved inside, the engagement of the joint part by the engagement piece is released in the longitudinal direction, and then the unit box-shaped roof pipe is lifted Is possible. However, for example, due to land acquisition and surrounding traffic, the vertical shaft cannot be formed in a free size, and the length along the excavation direction is longer than the length of the unit box roof pipe, for example. If the vertical shaft can only be formed with a length shorter than twice the length of the unit box-type roof pipe, pull out the unit box-type roof pipes one by one further forward, It is difficult to release the engagement in the longitudinal direction.

このため、従来の箱形ルーフ工法では、例えば到達立坑が狭い場合には、ガス切断等によって継手部の係合片が邪魔にならないように除去してから、単位箱形ルーフ管をさらに前方に引き出すことなく吊り上げる方法が採用されていたが、例えば単位箱形ルーフ管を転用して用いる際に、除去した係合片を溶接等によって再び取り付け直す必要を生じて多くの手間を要することになる。   For this reason, in the conventional box-type roof construction method, for example, when the reaching shaft is narrow, the engagement piece of the joint portion is removed so as not to get in the way by gas cutting or the like, and then the unit box-type roof pipe is further moved forward. Although the method of lifting without pulling out was adopted, for example, when the unit box-type roof pipe is diverted and used, it is necessary to reattach the removed engagement piece by welding or the like, which requires a lot of trouble. .

これに対して、上記特許文献1や特許文献2に記載の発明では、係合片を単位箱形ルーフ管の外周面に着脱可能にボルト接合したり(特許文献1参照)、単位箱形ルーフ管の係合片をフラットに突出させて(特許文献2参照)、隣接する単位箱形ルーフ管の間の係合片による継手部の係合を、到達立坑が狭い場合でも解除できるようにする工夫がなされている。   On the other hand, in the inventions described in Patent Document 1 and Patent Document 2, the engaging piece is detachably bolted to the outer peripheral surface of the unit box-shaped roof pipe (see Patent Document 1), or the unit box-shaped roof. The engagement piece of the pipe is projected flat (see Patent Document 2), and the engagement of the joint portion by the engagement piece between the adjacent unit box-type roof pipes can be released even when the reaching shaft is narrow. Ingenuity has been made.

一方、箱形ルーフ工法では、特に、横方向ルーフ列と両側の縦方向ルーフ列との一対の接合角部分に配置された角部箱形ルーフ管の角部単位箱形ルーフ管には、側方及び下方の、二つの側面部に継手部が設けられることから、これらの二つの側面部の係合状態を同時に解除する作業を行い難くなっている。また、横方向ルーフ列と両側の縦方向ルーフ列との一対の接合角部分のうちの一方の接合角部分に配置された角部単位箱形ルーフ管については、これと横方向及び縦方向に隣接する単位箱形ルーフ管との間の係合状態を同時に解除することによって当該角部単位箱形ルーフ管をスムーズに解体撤去できれば、残りの単位箱形ルーフ管については、一つの側面部のみに継手部が残された状態となることから、これらの一つの側面部の継手部の係合状態を単位箱形ルーフ管の僅かな移動で解除しつつ、当該残りの単位箱形ルーフ管を順次容易に解体撤去してゆくことが可能になるものと考えられる。   On the other hand, in the box-shaped roof construction method, in particular, the corner unit box-shaped roof pipe of the corner box-shaped roof pipe arranged at a pair of joint corners of the lateral roof row and the vertical roof rows on both sides has a side Since the joint portions are provided on the two side portions on one side and the lower side, it is difficult to perform an operation of simultaneously releasing the engagement state of these two side portions. In addition, for the corner unit box-shaped roof pipe disposed at one of the pair of joint corners of the lateral roof row and the vertical roof rows on both sides, the corner unit box-shaped roof pipe is arranged in the lateral and longitudinal directions. If the corner unit box roof tube can be smoothly dismantled and removed by simultaneously releasing the engagement state between adjacent unit box roof tubes, only one side surface portion of the remaining unit box roof tube can be used. Since the joint part is left in the state, the engagement state of the joint part of these one side part is released by a slight movement of the unit box roof pipe, and the remaining unit box roof pipe is removed. It will be possible to dismantle and remove them one after another.

本発明は、横方向ルーフ列と縦方向ルーフ列との接合角部分に配置された角部単位箱形ルーフ管をスムーズに解体撤去できるようにして、到達立坑が狭い場合でも、多くの手間を要することなく、到達立坑に押し出された単位箱形ルーフ管を順次容易に解体撤去してゆくことのできる箱形ルーフ管の継手構造を提供することを目的とする。   The present invention enables smooth dismantling and removal of the corner unit box-shaped roof pipe arranged at the joint angle portion between the lateral roof row and the longitudinal roof row, and can save a lot of trouble even when the reaching shaft is narrow. An object of the present invention is to provide a joint structure of box-shaped roof pipes that can easily and sequentially dismantle and remove unit box-shaped roof pipes pushed out to a reach shaft without necessity.

本発明は、設置される函体構造物の外周形状に沿って、複数の矩形断面を有する箱形ルーフ管を、発進立坑から到達立坑に向けて掘進させることにより地中に並べて設置し、しかる後に、設置した複数の箱形ルーフ管と置き換えるようにして、発進立坑から到達立坑に向けて前記函体構造物を掘進させることにより地中に設置する箱形ルーフ工法において用いられ、前記到達立坑に押し出された単位箱形ルーフ管の解体撤去を容易にする、横方向ルーフ列と縦方向ルーフ列との接合角部分に配置された角部箱形ルーフ管と、これの側方及び下方に隣接する側方箱形ルーフ管及び下方箱形ルーフ管との間の継手部の継手構造であって、前記継手部は、隣接する一方の単位箱形ルーフ管の側面部に突出して設けられた一対の外側係合片と、他方の単位箱形ルーフ管の側面部に突出して設けられた一対の内側係合片とを係合することによって構成されており、前記一対の外側係合片と前記一対の内側係合片との係合が、前記角部箱形ルーフ管と前記側方箱形ルーフ管との上下方向への相対的な位置ずれを拘束すると共に、前記角部箱形ルーフ管と前記下方箱形ルーフ管との左右方向への相対的な位置ずれを拘束するようになっており、且つ前記角部箱形ルーフ管の前記接合角部分から対角方向(略対角方向を含む)外側に向けた斜め上方への移動を干渉しないようになっている箱形ルーフ管の継手構造を提供することにより、上記目的を達成したものである。   The present invention installs a box-shaped roof pipe having a plurality of rectangular cross-sections along the outer peripheral shape of the box structure to be installed side by side from the starting vertical shaft to the reaching vertical shaft. Later, it is used in a box roof construction method that is installed in the ground by excavating the box structure from the starting shaft to the reaching shaft, replacing the plurality of box roof tubes installed, A rectangular box-shaped roof tube disposed at the joint corner of the horizontal roof row and the vertical roof row, which facilitates dismantling and removal of the unit box-shaped roof tube extruded into A joint structure of a joint portion between an adjacent side box roof pipe and a lower box roof pipe, wherein the joint portion is provided to protrude from a side surface portion of one adjacent unit box roof pipe. A pair of outer engagement pieces and the other It is configured by engaging a pair of inner engaging pieces provided protruding from the side surface portion of the position box roof tube, and the engagement between the pair of outer engaging pieces and the pair of inner engaging pieces. Restrains the relative positional deviation in the vertical direction between the corner box roof tube and the side box roof tube and between the corner box roof tube and the lower box roof tube. Relative displacement in the left-right direction is constrained, and obliquely upward toward the outside of the diagonal direction (including substantially diagonal direction) from the joint corner portion of the corner box-shaped roof pipe The above object is achieved by providing a joint structure of a box-shaped roof pipe that does not interfere with the movement of the box-shaped roof pipe.

そして、本発明の箱形ルーフ管の継手構造では、前記継手部における前記一対の外側係合片と前記一対の内側係合片との係合が、フラット断面形状の係合片による係合と、前記角部箱形ルーフ管の対角方向(略対角方向を含む)に沿った斜辺を有する3角形断面形状の係合片による係合とを組み合わせたものとなっており、且つ前記角部箱形ルーフ管と前記側方箱形ルーフ管との前記継手部と、前記角部箱形ルーフ管と前記下方箱形ルーフ管との前記継手部とで、前記3角形断面形状の係合片による係合と前記フラット断面形状の係合片による係合とが交互に配置されていることにより、前記角部箱形ルーフ管の前記接合角部分から対角方向外側に向けた斜め上方への移動を干渉しないようになっていることが好ましい。   And in the joint structure of the box-shaped roof pipe of the present invention, the engagement between the pair of outer engagement pieces and the pair of inner engagement pieces in the joint portion is the engagement by the engagement piece having a flat cross-sectional shape. The corner box-shaped roof tube is combined with engagement by an engagement piece having a triangular cross-sectional shape having a hypotenuse along a diagonal direction (including a substantially diagonal direction), and the corner Engagement of the triangular cross-sectional shape by the joint portion of the side box roof tube and the side box roof tube and the joint portion of the corner box roof tube and the lower box roof tube Since the engagement by the pieces and the engagement by the engagement pieces having the flat cross-sectional shape are alternately arranged, diagonally upward from the joint corner portion of the corner box-shaped roof pipe toward the diagonally outer side. It is preferable not to interfere with the movement of.

本発明の箱形ルーフ管の継手構造によれば、、横方向ルーフ列と縦方向ルーフ列との接合角部分に配置された角部単位箱形ルーフ管をスムーズに解体撤去できるようにして、到達立坑が狭い場合でも、多くの手間を要することなく、到達立坑に押し出された単位箱形ルーフ管を順次容易に解体撤去してゆくことができる。   According to the joint structure of the box-shaped roof pipe of the present invention, the corner unit box-shaped roof pipe arranged at the joint angle portion between the horizontal roof row and the vertical roof row can be smoothly disassembled and removed, Even when the reaching shaft is narrow, the unit box-shaped roof pipe pushed out to the reaching shaft can be easily disassembled and removed sequentially without much labor.

本発明の好ましい一実施形態に係る箱形ルーフ管の継手構造を用いた箱形ルーフ工法を説明する断面図である。It is sectional drawing explaining the box-shaped roof construction method using the joint structure of the box-shaped roof pipe which concerns on preferable one Embodiment of this invention. 本発明の好ましい一実施形態に係る箱形ルーフ管の継手構造を用いた箱形ルーフ工法において、到達立坑に押し出された単位箱形ルーフ管を解体撤去する状況を説明する略示断面図である。In the box-type roof construction method using the box-shaped roof pipe joint structure according to a preferred embodiment of the present invention, it is a schematic cross-sectional view for explaining the state of dismantling and removing the unit box-type roof pipe pushed out to the reach shaft. . 本発明の好ましい一実施形態に係る箱形ルーフ管の継手構造の構成を説明する要部正面図である。It is a principal part front view explaining the structure of the joint structure of the box-shaped roof pipe which concerns on preferable one Embodiment of this invention. 本発明の好ましい他の実施形態に係る箱形ルーフ管の継手構造の構成を説明する要部正面図である。It is a principal part front view explaining the structure of the joint structure of the box-shaped roof pipe which concerns on other preferable embodiment of this invention. 本発明の好ましい他の実施形態に係る箱形ルーフ管の継手構造の構成を説明する要部正面図である。It is a principal part front view explaining the structure of the joint structure of the box-shaped roof pipe which concerns on other preferable embodiment of this invention.

本発明の好ましい一実施形態に係る箱形ルーフ管の継手構造10は、図1及び図2に示すように、例えば鉄道の軌条30の下方を横断して、例えば道路トンネル用の地下構造物を形成するための矩形断面を有する中空の函体構造物17を、鉄道の軌条30の下方の地中に先行設置された、箱形ルーフ管11によるルーフ列14,15と置き換えることにより設置して構築する箱形ルーフ工法において採用されたものである。   As shown in FIGS. 1 and 2, a box roof pipe joint structure 10 according to a preferred embodiment of the present invention traverses a lower part of a rail 30 of a railway, for example, an underground structure for a road tunnel. A hollow box structure 17 having a rectangular cross section to be formed is installed by replacing the roof rows 14 and 15 by the box-shaped roof pipe 11 which is previously installed in the ground below the railroad rail 30. This was adopted in the box roof method to be constructed.

ここで、本実施形態では、函体構造物17は、その先端部分に刃口部材31が取り付けられており、この刃口部材31を切羽面に押し付けつつ、ルーフ列14,15の内側の地盤32を掘削すると共に、箱形ルーフ管11を到達立坑13に押し出しながら、到達立坑13に向けて掘進されるようになっている。また、本実施形態では、到達立坑13に押し出された箱形ルーフ管11は、押出し方向Xの先端側の単位箱形ルーフ管12から順次解体撤去されるようになっていると共に、函体構造物17の天井部17aに沿って配置された単位箱形ルーフ管12は、到達立坑13に設けられたルーフ受架台33によって受けてから解体撤去されるようになっている。   Here, in the present embodiment, the box structure 17 has a blade edge member 31 attached to the tip portion thereof, and the ground inside the roof rows 14 and 15 while pressing the blade edge member 31 against the face surface. In addition to excavating 32, the box-shaped roof pipe 11 is pushed toward the reaching shaft 13 while being pushed out toward the reaching shaft 13. Further, in the present embodiment, the box-shaped roof tube 11 pushed out to the reach shaft 13 is sequentially dismantled and removed from the unit box-shaped roof tube 12 on the distal end side in the pushing direction X, and the box structure. The unit box-shaped roof pipe 12 arranged along the ceiling portion 17a of the object 17 is received by a roof cradle 33 provided in the reaching shaft 13, and then dismantled and removed.

さらに、本実施形態では、到達立坑13は、用地買収や周囲の交通量等との関係で、押出し方向Xに沿った長さが、例えば3.0〜6.0m程度の長さの単位箱形ルーフ管12よりも長く、単位箱形ルーフ管12の2倍の長さよりも短い程度の大きさで形成されており、このような小さくて狭い到達立坑13においても、押し出された単位箱形ルーフ管12を、図3にも示すように、例えば横方向ルーフ列14と縦方向ルーフ列15との一方の接合角部分に配置された単位箱形ルーフ管12aから、順次スムーズに解体撤去して行くことができるようにするために、本発明の箱形ルーフ管の継手構造10が採用されたものである。   Furthermore, in this embodiment, the reach shaft 13 is a unit box having a length along the pushing direction X of, for example, about 3.0 to 6.0 m in relation to land acquisition, surrounding traffic, and the like. It is longer than the roof pipe 12 and shorter than twice the length of the unit box roof pipe 12, and even in such a small and narrow reaching shaft 13, the extruded unit box shape is formed. As shown in FIG. 3, the roof pipe 12 is successively and smoothly disassembled and removed from the unit box-shaped roof pipe 12 a arranged at one joint angle portion of the horizontal roof row 14 and the vertical roof row 15, for example. In order to be able to go, the joint structure 10 of the box-shaped roof pipe of the present invention is employed.

そして、本実施形態の箱形ルーフ管の継手構造10は、設置される函体構造物17の外周形状に沿って、複数の矩形断面を有する箱形ルーフ管11を、発進立坑(図示せず)から到達立坑13に向けて掘進させることにより地中に並べて設置し、しかる後に、設置した複数の箱形ルーフ管11と置き換えるようにして、発進立坑から到達立坑13に向けて函体構造物17を掘進させることにより地中に設置する箱形ルーフ工法において用いられ、到達立坑13に押し出された単位箱形ルーフ管12の解体撤去を容易にする、横方向ルーフ列14と縦方向ルーフ列15との接合角部分に配置された角部箱形ルーフ管11aと、これの側方及び下方に隣接する側方箱形ルーフ管11b及び下方箱形ルーフ管11cとの間の継手部16の構造である。継手部16は、隣接する一方の単位箱形ルーフ管12a,12cの側面部に突出して設けられた一対の外側係合片18a,18bと、他方の単位箱形ルーフ管12b,12aの側面部に突出して設けられた一対の内側係合片19a,19bとを係合することによって構成されており、一対の外側係合片18a,18bと一対の内側係合片19a,19bとの係合が、角部箱形ルーフ管11aと側方箱形ルーフ管11bとの上下方向への相対的な位置ずれを拘束すると共に、角部箱形ルーフ管11aと下方箱形ルーフ管11cとの左右方向への相対的な位置ずれを拘束するようになっており、且つ角部箱形ルーフ管11aの接合角部分から対角方向(略対角方向を含む)外側Yに向けた斜め上方への移動を干渉しないようになっている。   And the joint structure 10 of the box-shaped roof pipe of this embodiment is the box-shaped roof pipe 11 which has a some rectangular cross section along the outer periphery shape of the box-shaped structure 17 installed. ) From the starting vertical shaft toward the vertical shaft 13 so as to replace the plurality of box-shaped roof pipes 11 installed. A lateral roof row 14 and a longitudinal roof row that are used in a box roof construction method that is installed in the ground by excavating 17 and facilitates the dismantling and removal of the unit box roof tube 12 that has been pushed out to the reach shaft 13. Of the joint portion 16 between the corner box-shaped roof tube 11a arranged at the joint corner with the side wall 15 and the side box-shaped roof tube 11b and the lower box-shaped roof tube 11c adjacent to the side and the lower side thereof. Is structureThe joint portion 16 includes a pair of outer engaging pieces 18a and 18b provided to project from the side surface portions of one of the adjacent unit box-shaped roof tubes 12a and 12c, and the side surface portion of the other unit box-shaped roof tube 12b and 12a. Are engaged with a pair of inner engagement pieces 19a, 19b provided so as to project from each other, and the engagement between the pair of outer engagement pieces 18a, 18b and the pair of inner engagement pieces 19a, 19b. Restricts the relative vertical displacement between the corner box roof tube 11a and the side box roof tube 11b and the left and right sides of the corner box roof tube 11a and the lower box roof tube 11c. Relative positional deviation in the direction is constrained, and diagonally upward (including substantially diagonal direction) diagonally upward from the joint corner portion of the corner box-shaped roof pipe 11a. It does not interfere with movement.

また、本実施形態の箱形ルーフ管の継手構造10では、継手部16における一対の外側係合片18a,18bと一対の内側係合片19a,19bとの係合が、フラット断面形状の係合片20による係合と、角部箱形ルーフ管11aの対角方向(略対角方向を含む)に沿った斜辺21aを有する3角形断面形状の係合片21による係合とを組み合わせたものとなっており、且つ角部箱形ルーフ管11aと側方箱形ルーフ管11bとの継手部16と、角部箱形ルーフ管11aと下方箱形ルーフ管11cとの継手部16とで、3角形断面形状の係合片21による係合とフラット断面形状の係合片20による係合とが交互に配置されていることにより、角部箱形ルーフ管11aの接合角部分から対角方向外側Yに向けた斜め上方への移動を干渉しないようになっている。   In the joint structure 10 of the box-shaped roof pipe of the present embodiment, the engagement between the pair of outer engagement pieces 18a and 18b and the pair of inner engagement pieces 19a and 19b in the joint portion 16 has a flat cross-sectional shape. The engagement by the combination piece 20 and the engagement by the engagement piece 21 having a triangular cross-sectional shape having a hypotenuse 21a along a diagonal direction (including a substantially diagonal direction) of the corner box-shaped roof tube 11a are combined. And a joint portion 16 of the corner box roof tube 11a and the side box roof tube 11b, and a joint portion 16 of the corner box roof tube 11a and the lower box roof tube 11c. The engagement by the engagement piece 21 having the triangular cross-sectional shape and the engagement by the engagement piece 20 having the flat cross-sectional shape are alternately arranged, so that the diagonal from the joint angle portion of the square box-shaped roof tube 11a. Does not interfere with the diagonally upward movement toward the outside Y It has become the jar.

なお、本実施形態では、一方の接合角部分に配置された角部箱形ルーフ管11aを構成する角部単位箱形ルーフ管12aと、これの側方に隣接する側方箱形ルーフ管11bを構成する側方単位箱形ルーフ管12b及び下方に隣接する下方箱形ルーフ管11cを構成する下方単位箱形ルーフ管12cとの間の継手部16についてのみ、本発明の継手構造が採用されるようになっており、他の隣接する箱形ルーフ管11を構成する単位箱形ルーフ管12の間の継手部16’については、従来の継手部と同様の、例えば両側の側面部に一体接合されたフラット断面形状を備える係合片20による継手構造が採用されるようになっている(図3参照)。   In this embodiment, the corner unit box-shaped roof tube 12a constituting the corner box-shaped roof tube 11a disposed at one of the joint corners, and the side box-shaped roof tube 11b adjacent to the side of the corner unit box-shaped roof tube 11b. The joint structure of the present invention is adopted only for the joint portion 16 between the side unit box-shaped roof pipe 12b that constitutes the lower unit box-shaped roof pipe 12c that constitutes the lower box-shaped roof pipe 11c adjacent to the lower side. The joint portion 16 ′ between the unit box-type roof pipes 12 constituting the other adjacent box-type roof pipes 11 is integrated with, for example, side portions on both sides, similar to the conventional joint portion. A joint structure by the engagement piece 20 having a joined flat cross-sectional shape is adopted (see FIG. 3).

すなわち、本第1実施形態では、函体構造物17の天井部17aに沿って配置された複数の箱形ルーフ管11からなる横方向ルーフ列14と、函体構造物17の両側の側壁部に沿って配置された複数の箱形ルーフ管11からなる両側の一対の縦方向ルーフ列15とが、下方を向いたコの字断面形状を有するように、接合角部分の箱形ルーフ管11aを介して互いに連結されて横断面方向に連続一体化された状態となっており、これらの連続一体化されたルーフ列14,15の各箱形ルーフ管11が一体として掘進されるようになっている。このため、横方向ルーフ列14と縦方向ルーフ列15との接合角部分に配置された角部箱形ルーフ管11aの角部単位箱形ルーフ管12aは、側方及び下方の二つの側面部に継手部16が設けられることから、特に当該接合角部分の角部箱形ルーフ管11aの二つの側面部の係合状態を同時に解除する作業を行い難くなっている。   That is, in the first embodiment, the lateral roof row 14 composed of a plurality of box-shaped roof tubes 11 arranged along the ceiling portion 17 a of the box structure 17 and the side wall portions on both sides of the box structure 17. The box-shaped roof tubes 11a at the joint corners so that the pair of longitudinal roof rows 15 on both sides composed of the plurality of box-shaped roof tubes 11 arranged along the vertical direction have a U-shaped cross section facing downward. Are connected to each other through a cross-sectional direction and are continuously integrated in the cross-sectional direction, and the box-shaped roof pipes 11 of these continuously integrated roof rows 14 and 15 are dug together as a unit. ing. For this reason, the corner unit box-shaped roof tube 12a of the corner box-shaped roof tube 11a arranged at the joint angle portion between the lateral roof row 14 and the longitudinal roof row 15 has two side portions on the side and lower side. Since the joint portion 16 is provided at the joint portion, it is difficult to perform an operation of simultaneously releasing the engagement states of the two side portions of the corner box-shaped roof pipe 11a at the joint corner portion.

また、横方向ルーフ列14と縦方向ルーフ列15との一方の接合角部分に配置された角部箱形ルーフ管11aの角部単位箱形ルーフ管12aと、これと横方向及び縦方向に隣接する単位箱形ルーフ管12b,12cとの係合状態を解除して当該単位箱形ルーフ管12aを解体撤去できれば、残りの単位箱形ルーフ管12については、一つの側面部のみに残された継手部16’の係合状態を、単位箱形ルーフ管12の僅かな移動で解除しつつ順次容易に解体撤去してゆくことが可能になる。このため、本実施形態では、一方の接合角部分に配置された角部箱形ルーフ管11aの単位箱形ルーフ管12aと、これの側方及び下方に隣接する箱形ルーフ管11b,11cを構成する単位箱形ルーフ管12b,12cとの間の継手部16についてのみ、本発明の継手構造10が採用されて、一方の接合角部分に配置された角部単位箱形ルーフ管12aの解体撤去を速やかに行えるようにすると共に、他の継手部16’については、従来の継手部と同様のフラット断面形状を備える係合片20による継手構造が採用されるようになっている。   Further, the corner unit box-shaped roof tube 12a of the corner box-shaped roof tube 11a disposed at one joint corner of the lateral roof column 14 and the vertical roof column 15, and the lateral unit and the longitudinal direction thereof. If the unit box roof tube 12a can be disassembled and removed by disengaging the adjacent unit box roof tubes 12b and 12c, the remaining unit box roof tube 12 is left only on one side surface. The disengaged state of the joint portion 16 ′ can be sequentially and easily disassembled and removed while being released by a slight movement of the unit box-shaped roof pipe 12. For this reason, in the present embodiment, the unit box-shaped roof tube 12a of the corner box-shaped roof tube 11a disposed at one joint angle portion, and the box-shaped roof tubes 11b, 11c adjacent to the sides and below of the unit box-shaped roof tube 12a. The joint structure 10 of the present invention is adopted only for the joint portion 16 between the unit box roof pipes 12b and 12c constituting the dismantling of the corner unit box roof pipe 12a disposed at one joint angle portion. While being able to remove quickly, about other joint part 16 ', the joint structure by the engagement piece 20 provided with the flat cross-sectional shape similar to the conventional joint part is employ | adopted.

ここで、本実施形態では、箱形ルーフ管11を構成する単位箱形ルーフ管12として、例えばアール・アンド・シー工法(株式会社奥村組製)に使用する公知の矩形パイプを好ましく用いることができる。単位箱形ルーフ管12は、例えば縦横800mm程度の矩形(正方形)の断面形状を備えると共に、内部に作業員が入って作業を行うことが可能な中空部分を備えている。   Here, in this embodiment, as the unit box-shaped roof pipe 12 constituting the box-shaped roof pipe 11, for example, a known rectangular pipe used for the R & C method (manufactured by Okumura Corporation) can be preferably used. . The unit box-shaped roof pipe 12 has a rectangular (square) cross-sectional shape of about 800 mm in length and width, for example, and a hollow portion in which an operator can enter and work.

また、単位箱形ルーフ管12は、長手方向の両端部の四隅の部分に、ボルト締着孔25が形成された連結リブ26が取り付けられている(図3参照)。これらの連結リブ26を介して、連結ボルトにより複数の単位箱形ルーフ管12を軸方向に後方から順次継ぎ足しながら、発進立坑から到達立坑13に向けて箱形ルーフ管11を掘進させることができるようになっている。   In addition, the unit box-shaped roof pipe 12 is provided with connecting ribs 26 in which bolt fastening holes 25 are formed at the four corners at both ends in the longitudinal direction (see FIG. 3). Through these connecting ribs 26, the box-shaped roof tube 11 can be advanced from the starting shaft to the reaching shaft 13 while sequentially connecting a plurality of unit box-shaped roof tubes 12 from the rear in the axial direction by connecting bolts. It is like that.

さらに、本実施形態では、例えば単位箱形ルーフ管12の側面部から突出して設けられた一対の外側係合片18a,18bと一対の内側係合片19a,19bとを、各継手部16,16’において、内側係合片19a,19bを外側係合片18a,18bの内側に各々配置して、横方向又は縦方向に隣接する箱形ルーフ管11の間で係合するようになっており、これによって、隣接する箱形ルーフ管11(単位箱形ルーフ管12)が、掘進作業中に横方向や縦方向への相対的な位置ずれを生じないようにすることができるようになっている。   Further, in the present embodiment, for example, a pair of outer engagement pieces 18a and 18b and a pair of inner engagement pieces 19a and 19b provided so as to protrude from the side surface portion of the unit box-shaped roof tube 12 are connected to each joint portion 16, 16 ', the inner engagement pieces 19a and 19b are respectively arranged inside the outer engagement pieces 18a and 18b so as to be engaged between the box-shaped roof tubes 11 adjacent in the horizontal direction or the vertical direction. Thus, the adjacent box-shaped roof pipe 11 (unit box-shaped roof pipe 12) can be prevented from causing a relative displacement in the horizontal direction or the vertical direction during the excavation work. ing.

さらにまた、本実施形態では、横方向ルーフ列14を構成する箱形ルーフ管11の上面や、縦方向ルーフ列15を構成する箱形ルーフ管11の外側面に沿って、例えば上述のアール・アンド・シー工法に使用する公知のフリクションカットプレートからなる縁切り板27(図1参照)が設けられている。これらの縁切り板27は、地中に設置した箱形ルーフ管11によるルーフ列14,15の後方に函体構造物17を接続して押し出すことにより、ルーフ列14,15と置き換えて函体構造物17を地中に設置する際に、ルーフ列14,15を周囲の地盤から縁切りする機能と、函体構造物17のスライド移動を容易にするガイド面としての機能を発揮することになる。   Furthermore, in the present embodiment, along the upper surface of the box-shaped roof tube 11 constituting the lateral roof row 14 and the outer surface of the box-shaped roof tube 11 constituting the longitudinal roof row 15, for example, the above-mentioned R An edge cutting plate 27 (see FIG. 1) made of a known friction cut plate used in the AND sea method is provided. These edge-cutting plates 27 are replaced with the roof rows 14 and 15 by connecting the box structures 17 to the rear of the roof rows 14 and 15 by the box-shaped roof pipes 11 installed in the ground, and are extruded. When the object 17 is installed in the ground, the function of cutting the roof rows 14 and 15 from the surrounding ground and the function of a guide surface that facilitates the sliding movement of the box structure 17 are exhibited.

そして、本実施形態の箱形ルーフ管の継手構造10は、上述のように、横方向ルーフ列14と縦方向ルーフ列15との接合角部分に配置された角部箱形ルーフ管11aと、これの側方及び下方に隣接する側方箱形ルーフ管11b及び下方箱形ルーフ管11cとの間の継手部16における、一対の外側係合片18a,18bと一対の内側係合片19a,19bとの係合が、図3に示すように、フラット断面形状の係合片20による係合と、角部箱形ルーフ管11aの対角方向に沿った斜辺21aを有する3角形断面形状の係合片21による係合とを組み合わせたものとなっており、且つ角部箱形ルーフ管11aと側方箱形ルーフ管11bとの継手部16と、角部箱形ルーフ管11aと下方箱形ルーフ管11cとの継手部16とで、3角形断面形状の係合片21による係合とフラット断面形状の係合片20による係合とが交互に配置されていることにより、角部箱形ルーフ管11aの接合角部分から対角方向外側Yに向けた斜め上方への移動を干渉しないようになっている。   And the joint structure 10 of the box-shaped roof pipe of this embodiment is the corner box-shaped roof pipe 11a arrange | positioned in the junction angle part of the horizontal direction roof row | line | column 14 and the vertical direction roof row | line | column 15 as mentioned above, A pair of outer engaging pieces 18a, 18b and a pair of inner engaging pieces 19a, in the joint portion 16 between the side box-shaped roof tube 11b and the lower box-shaped roof tube 11c adjacent to the side and the lower side thereof. As shown in FIG. 3, the engagement with 19b has a triangular cross-sectional shape having an engagement piece 20 with a flat cross-sectional shape and a diagonal side 21a along the diagonal direction of the rectangular box-shaped roof tube 11a. It is a combination of engagement by the engagement pieces 21, and the joint portion 16 of the corner box roof tube 11a and the side box roof tube 11b, the corner box roof tube 11a and the lower box. Triangular cross-section with joint part 16 with shaped roof pipe 11c The engagement by the engagement pieces 21 and the engagement by the engagement pieces 20 having a flat cross-sectional shape are alternately arranged, so that the corner box-shaped roof tube 11a faces the diagonally outer side Y from the joint angle portion. It does not interfere with the upward movement.

すなわち、本実施形態では、角部箱形ルーフ管11aを構成する角部単位箱形ルーフ管12aの側方箱形ルーフ管11bと対向する側方の側面部には、その上端部分に、外側係合片18aとして、フラット断面形状を備える係合片20が、例えば70mmの突出高さで突出して、角部単位箱形ルーフ管12aの略全長に亘って例えば溶着接合により取り付けられており、その下端部分に、外側係合片18bとして、好ましくは直角3角形の断面形状を有する係合片21が、例えば70mmの突出高さで突出して、斜辺21aを斜め上方に向けて角部単位箱形ルーフ管12aの略全長に亘って例えば溶着接合により取り付けられている。   That is, in the present embodiment, the side surface portion of the corner unit box-shaped roof tube 12a that constitutes the corner box-shaped roof tube 11a that faces the side box-shaped roof tube 11b, As the engagement piece 18a, the engagement piece 20 having a flat cross-sectional shape protrudes with a protrusion height of, for example, 70 mm, and is attached by, for example, welding joining over substantially the entire length of the corner unit box-shaped roof tube 12a. At the lower end portion, as the outer engagement piece 18b, an engagement piece 21 preferably having a right-angled triangular cross-sectional shape protrudes with a protrusion height of, for example, 70 mm, and the corner unit box with the oblique side 21a facing obliquely upward. The roof tube 12a is attached to the substantially entire length of the roof pipe 12a, for example, by welding.

また、角部単位箱形ルーフ管12aの下方箱形ルーフ管11bと対向する下方の側面部には、その外側部分に、内側係合片19aとして、好ましくは直角3角形の断面形状を有する係合片21が、例えば70mmの突出高さで突出して、斜辺21aを斜め外方に向けて角部単位箱形ルーフ管12aの略全長に亘って例えば溶着接合により取り付けられており、その内側部分に、内側係合片19bとして、フラット断面形状を備える係合片20が、例えば70mmの突出高さで突出して、角部単位箱形ルーフ管12aの略全長に亘って例えば溶着接合により取り付けられている。   In addition, the lower side surface portion of the corner unit box-shaped roof tube 12a facing the lower box-shaped roof tube 11b has an engagement portion 19a on the outer side thereof, preferably having a right-angled triangular cross-sectional shape. The joining piece 21 protrudes at a protruding height of, for example, 70 mm, and is attached by, for example, welding joining over substantially the entire length of the corner unit box-shaped roof pipe 12a with the oblique side 21a facing obliquely outward. Further, as the inner engagement piece 19b, an engagement piece 20 having a flat cross-sectional shape protrudes with a protrusion height of 70 mm, for example, and is attached by, for example, welding joining over the substantially entire length of the corner unit box-shaped roof tube 12a. ing.

一方、本実施形態では、側方箱形ルーフ管11bを構成する側方単位箱形ルーフ管12bの角部箱形ルーフ管11aと対向する側方の側面部には、その上端部分に、内側係合片19aとして、フラット断面形状を備える係合片20が、例えば70mmの突出高さで突出して、側方単位箱形ルーフ管12bの略全長に亘って例えば溶着接合により取り付けられており、その下端部分に、内側係合片19bとして、好ましくは直角3角形の断面形状を有する係合片21が、例えば70mmの突出高さで突出して、斜辺21aを斜め下方に向けて側方単位箱形ルーフ管12bの略全長に亘って例えば溶着接合により取り付けられている。   On the other hand, in the present embodiment, the side unit of the side unit box-shaped roof tube 12b that constitutes the side box-shaped roof tube 11b has a lateral side facing the corner-shaped box-shaped roof tube 11a at its upper end, As the engagement piece 19a, the engagement piece 20 having a flat cross-sectional shape protrudes with a protrusion height of, for example, 70 mm, and is attached by, for example, welding joining over substantially the entire length of the side unit box-shaped roof tube 12b. An engaging piece 21 having a right-angled triangular cross-sectional shape as an inner engaging piece 19b protrudes at a lower end portion thereof, for example, with a protruding height of 70 mm, and the side unit box is inclined obliquely downward. The roof tube 12b is attached over substantially the entire length, for example, by welding.

また、本実施形態では、下方箱形ルーフ管11cを構成する下方単位箱形ルーフ管12cの角部箱形ルーフ管11aと対向する上方の側面部には、その外側部分に、外側係合片18aとして、好ましくは直角3角形の断面形状を有する係合片21が、例えば70mmの突出高さで突出して、斜辺21aを斜め内方に向けて下方単位箱形ルーフ管12cの略全長に亘って例えば溶着接合により取り付けられており、その内側部分に、外側係合片18bとして、フラット断面形状を備える係合片20が、例えば70mmの突出高さで突出して、下方単位箱形ルーフ管12cの略全長に亘って例えば溶着接合により取り付けられている。   In the present embodiment, the upper side surface portion of the lower unit box-shaped roof tube 12c constituting the lower box-shaped roof tube 11c facing the corner box-shaped roof tube 11a has an outer engagement piece on its outer side. 18a, an engagement piece 21 having preferably a right-angled triangular cross-sectional shape protrudes with a protruding height of, for example, 70 mm, and extends over substantially the entire length of the lower unit box-shaped roof tube 12c with the inclined side 21a facing inwardly. For example, an engagement piece 20 having a flat cross-sectional shape as an outer engagement piece 18b projects at an inner height of the lower unit box-shaped roof tube 12c. For example, by welding.

上述の構成を有する本実施形態の箱形ルーフ管の継手構造10によれば、角部箱形ルーフ管11aを構成する角部単位箱形ルーフ管12aと側方箱形ルーフ管11bを構成する側方単位箱形ルーフ管12bとの継手部16が、角部単位箱形ルーフ管12aの側方箱形ルーフ管11bと対向する側面部に突出して設けられた一対の外側係合片18a,18bと、側方単位箱形ルーフ管12bの角部箱形ルーフ管11aと対向する側面部に突出して設けられた一対の内側係合片19a,19bとを係合することによって形成されているので、掘進時における角部箱形ルーフ管11aと側方箱形ルーフ管11bとの上下方向への相対的な位置ずれを効果的に拘束することが可能になる。   According to the joint structure 10 of the box-shaped roof tube of the present embodiment having the above-described configuration, the corner unit box-shaped roof tube 12a and the side box-shaped roof tube 11b constituting the corner-shaped box-shaped roof tube 11a are configured. A pair of outer engagement pieces 18a provided with a joint portion 16 with the side unit box-shaped roof tube 12b protruding from a side surface of the corner unit box-shaped roof tube 12a facing the side box-shaped roof tube 11b, 18b and a pair of inner engaging pieces 19a, 19b provided to project from the side surface of the side unit box-shaped roof tube 12b facing the corner box-shaped roof tube 11a. Therefore, it is possible to effectively restrain the relative positional deviation in the vertical direction between the corner box roof tube 11a and the side box roof tube 11b during excavation.

また、角部箱形ルーフ管11aを構成する角部単位箱形ルーフ管12aと下方箱形ルーフ管11cを構成する下方単位箱形ルーフ管12cとの継手部16が、角部単位箱形ルーフ管12aの下方箱形ルーフ管11cと対向する側面部に突出して設けられた一対の内側係合片19a,19bと、下方単位箱形ルーフ管12cの角部箱形ルーフ管11aと対向する側面部に突出して設けられた一対の外側係合片18a,18bとを係合することによって形成されているので、掘進時における角部箱形ルーフ管11aと下方箱形ルーフ管11cとの左右方向への相対的な位置ずれを効果的に拘束することが可能になる。   Further, a joint portion 16 of the corner unit box roof tube 12a constituting the corner box roof tube 11a and the lower unit box roof tube 12c constituting the lower box roof tube 11c is formed by a corner unit box roof. A pair of inner engagement pieces 19a and 19b provided to project from the side surface of the tube 12a facing the lower box-shaped roof tube 11c, and the side surface of the lower unit box-shaped roof tube 12c facing the corner box-shaped roof tube 11a. Since it is formed by engaging a pair of outer engagement pieces 18a, 18b provided protruding from the section, the left and right directions of the corner box roof tube 11a and the lower box roof tube 11c during digging It is possible to effectively restrain the relative positional shift to the.

そして、本実施形態の箱形ルーフ管の継手構造10によれば、到達立坑13に押し出された、箱形ルーフ管11の押出し方向Xの先端側の単位箱形ルーフ管12を解体撤去する際に、横方向ルーフ列14と縦方向ルーフ列15との接合角部分に配置された角部単位箱形ルーフ管12aをスムーズに解体撤去できるようにして、到達立坑13が狭い場合でも、多くの手間を要することなく、到達立坑13に押し出された単位箱形ルーフ管12を順次容易に解体撤去してゆくことが可能になる。   And according to the joint structure 10 of the box-shaped roof pipe of this embodiment, when dismantling and removing the unit box-shaped roof pipe 12 on the front end side in the pushing direction X of the box-shaped roof pipe 11 that has been pushed out to the reach shaft 13 In addition, it is possible to smoothly dismantle and remove the corner unit box-shaped roof pipe 12a arranged at the joint angle portion between the lateral roof row 14 and the longitudinal roof row 15, and even when the reaching shaft 13 is narrow, The unit box-shaped roof pipe 12 pushed out to the reaching shaft 13 can be easily disassembled and removed one by one without any trouble.

すなわち、本実施形態によれば、角部単位箱形ルーフ管12aとこれに隣接する側方単位箱形ルーフ管12b及び下方単位箱形ルーフ管12cとの継手部16が、一対の外側係合片18a,18bと一対の内側係合片19a,19bとを係合することにより形成されており、これらの継手部16が、角部箱形ルーフ管11aの対角方向に沿った斜辺21aを有する3角形断面形状の係合片21による係合を含んだものとなっているので、角部単位箱形ルーフ管12aを接合角部分から対角方向外側Yに向けて斜め上方へ移動させることで、角部単位箱形ルーフ管12aの二つの側面部における継手部16の係合状態を同時に容易に解除することが可能になり、これによって横方向ルーフ列14と縦方向ルーフ列15との接合角部分に配置された角部単位箱形ルーフ管12aを、スムーズに解体撤去することが可能になる。また角部単位箱形ルーフ管12aをスムーズに解体撤去することで、残りの単位箱形ルーフ管12b,12c,12については、一つの側面部のみに残された継手部16’の係合状態を、単位箱形ルーフ管12の僅かな移動で解除しつつ順次容易に解体撤去してゆくことが可能になる。   That is, according to this embodiment, the joint portion 16 of the corner unit box-shaped roof pipe 12a and the side unit box-shaped roof pipe 12b and the lower unit box-shaped roof pipe 12c adjacent to the corner unit box-shaped roof pipe 12a The joints 16 are formed by engaging the pieces 18a, 18b and the pair of inner engagement pieces 19a, 19b, and these joint portions 16 have the hypotenuses 21a along the diagonal direction of the corner box-shaped roof tube 11a. Since the engagement by the engagement piece 21 having the triangular cross-sectional shape is included, the corner unit box-shaped roof pipe 12a is moved obliquely upward from the joint corner portion toward the diagonally outer side Y. Thus, the engagement state of the joint portions 16 in the two side surfaces of the corner unit box-shaped roof pipe 12a can be easily released simultaneously, whereby the lateral roof row 14 and the vertical roof row 15 Placed at the joint corner A corner unit box type roof tube 12a, it is possible to smoothly dismantling. In addition, by smoothly dismantling and removing the corner unit box-shaped roof pipe 12a, the remaining unit box-shaped roof pipes 12b, 12c, and 12 are engaged with the joint portion 16 'remaining only on one side surface. Can be easily disassembled and removed one after another while releasing the unit box roof pipe 12 with a slight movement.

図4は、本発明の他の実施形態に係る箱形ルーフ管の継手構造10’を示すものである。図4に示す他の実施形態によれば、上記実施形態と略同様の構成を備える他、角部箱形ルーフ管11aを構成する角部単位箱形ルーフ管12aの側方箱形ルーフ管11bと対向する側方の側面部には、その上端部分に、内側係合片19aとして、好ましくは直角3角形の断面形状を有する係合片21が、斜辺21aを斜め上方に向けて取り付けられており、その下端部分に、内側係合片19bとして、フラット断面形状を備える係合片20が取り付けられている。また、角部単位箱形ルーフ管12aの下方箱形ルーフ管11bと対向する下方の側面部には、その外側部分に、外側係合片18aとして、フラット断面形状を備える係合片20が取り付けられており、その内側部分に、外側係合片18bとして、好ましくは直角3角形の断面形状を有する係合片21が斜辺21aを斜め外方に向けて取り付けられている。   FIG. 4 shows a joint structure 10 'for a box-shaped roof pipe according to another embodiment of the present invention. According to another embodiment shown in FIG. 4, in addition to having the same configuration as that of the above embodiment, the side box roof tube 11b of the corner unit box roof tube 12a constituting the corner box roof tube 11a. An engagement piece 21 having a right-angled triangular cross-sectional shape as an inner engagement piece 19a is attached to an upper end portion of the side surface portion opposite to the side portion with the oblique side 21a facing obliquely upward. And the engagement piece 20 provided with the flat cross-sectional shape is attached to the lower end part as the inner side engagement piece 19b. Further, an engagement piece 20 having a flat cross-sectional shape is attached to the outer side portion of the lower side surface portion of the corner unit box-shaped roof tube 12a facing the lower box-shaped roof tube 11b as an outer engagement piece 18a. An engaging piece 21 having a preferably right-angled triangular cross-sectional shape is attached to the inner portion thereof as an outer engaging piece 18b with the hypotenuse 21a facing obliquely outward.

一方、側方箱形ルーフ管11bを構成する側方単位箱形ルーフ管12bの角部箱形ルーフ管11aと対向する側方の側面部には、その上端部分に、外側係合片18aとして、好ましくは直角3角形の断面形状を有する係合片21が斜辺21aを斜め下方に向けて取り付けられており、、その下端部分に、外側係合片18aとして、フラット断面形状を備える係合片20が取り付けられている。また、下方箱形ルーフ管11cを構成する下方単位箱形ルーフ管12cの角部箱形ルーフ管11aと対向する上方の側面部には、その外側部分に、内側係合片19aとして、フラット断面形状を備える係合片20が取り付けられており、その内側部分に、内側係合片19bとして、好ましくは直角3角形の断面形状を有する係合片21が斜辺21aを斜め外方に向けて取り付けられている。   On the other hand, on the side surface portion of the side unit box-shaped roof tube 12b constituting the side box-shaped roof tube 11b that faces the corner box-shaped roof tube 11a, the outer engagement piece 18a is formed at the upper end portion thereof. The engagement piece 21 having a preferably right-angled triangular cross-sectional shape is attached with the hypotenuse 21a facing diagonally downward, and an engagement piece having a flat cross-sectional shape as an outer engagement piece 18a at the lower end portion thereof. 20 is attached. Further, an upper side surface portion of the lower unit box-shaped roof tube 12c constituting the lower box-shaped roof tube 11c facing the corner box-shaped roof tube 11a has a flat cross section as an inner engagement piece 19a on its outer portion. An engagement piece 20 having a shape is attached, and an engagement piece 21 having a right-angled triangular cross-sectional shape is attached to an inner portion thereof as an inner engagement piece 19b with a hypotenuse 21a facing obliquely outward. It has been.

そして、図4に示す他の実施形態の箱形ルーフ管の継手構造10’によっても、角部箱形ルーフ管11aを接合角部分から対角方向外側Yに向けて斜め上方へ移動させることで、二つの側面部における継手部16の係合状態を同時にスムーズに解除することが可能になり、上記実施形態の継手構造10と同様の作用効果を奏することになる。   And also by the box-shaped roof pipe joint structure 10 'of the other embodiment shown in FIG. 4, the corner-shaped box-shaped roof pipe 11a is moved diagonally upward from the joint corner portion toward the diagonally outer side Y. Thus, it is possible to simultaneously and smoothly release the engagement state of the joint portion 16 in the two side surface portions, and the same effects as the joint structure 10 of the above-described embodiment can be obtained.

なお、本発明は上記各実施形態に限定されることなく種々の変更が可能である。例えば、角部単位箱形ルーフ管とこれに隣接する側方単位箱形ルーフ管及び下方単位箱形ルーフ管との継手部は、フラット断面形状の係合片による係合と、角部箱形ルーフ管の対角方向に沿った斜辺を有する3角形断面形状の係合片による係合とを組み合わせたものである必要は必ずしも無く、例えば図5に示すように、全ての係合を、角部箱形ルーフ管の対角方向に沿った斜辺を有する3角形断面形状の係合片によるもとすることができる他、角部箱形ルーフ管と側方箱形ルーフ管との上下方向への相対的な位置ずれを拘束すると共に、角部箱形ルーフ管と下方箱形ルーフ管との左右方向への相対的な位置ずれを拘束し、且つ角部箱形ルーフ管の接合角部分から対角方向外側に向けた斜め上方への移動を干渉しないような構造の、その他の種々の継手構造を採用することもできる。また、角部箱形ルーフ管の対角方向に沿った斜辺を有する係合片は、直角3角形の断面形状を有している必要は必ずしも無く、角部箱形ルーフ管の対角方向に沿った斜辺を有する、その他の種々の断面形状(3角形以外の断面形状を含む)のものを採用することができる。   The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, a joint portion between a corner unit box-shaped roof pipe and a side unit box-shaped roof pipe and a lower unit box-shaped roof pipe adjacent to the corner unit box-shaped roof pipe, It is not always necessary to combine the engagement with the engagement piece having the triangular cross-sectional shape having the hypotenuse along the diagonal direction of the roof tube. For example, as shown in FIG. In addition to the engagement piece having a triangular cross-sectional shape having a hypotenuse along the diagonal direction of the box-shaped roof tube, the vertical direction of the box-shaped roof tube and the side box-shaped roof tube Of the corner box roof pipe and the lower box roof pipe in the left-right direction is restricted, and the corner box roof pipe is joined from the joint angle portion. Other structures that do not interfere with diagonally upward movement diagonally outward It is also possible to adopt a joint structure of the people. Further, the engaging piece having the hypotenuse along the diagonal direction of the corner box-shaped roof tube does not necessarily have a right-angled triangular cross-sectional shape, and is not necessarily in the diagonal direction of the corner box-shaped roof tube. Various other cross-sectional shapes (including cross-sectional shapes other than triangles) having a hypotenuse along can be employed.

10,10’ 箱形ルーフ管の継手構造
11 箱形ルーフ管
11a 角部箱形ルーフ管
11b 側方箱形ルーフ管
11c 下方箱形ルーフ管
12 単位箱形ルーフ管
12a 角部単位箱形ルーフ管
12b 側方単位箱形ルーフ管
12c 下方単位箱形ルーフ管
13 到達立坑
14 横方向ルーフ列
15 縦方向ルーフ列
16 継手部
17 函体構造物
18a,18b 外側係合片
19a,19b 内側係合片
20 フラット断面形状の係合片
21 3角形断面形状の係合片
21a 角部箱形ルーフ管の対角方向に沿った斜辺
22 ボルト締着孔
23 ボルト部材
X 押出し方向
Y 対角方向外側
10, 10 'Box-shaped roof tube joint structure 11 Box-shaped roof tube 11a Corner box-shaped roof tube 11b Side box-shaped roof tube 11c Lower box-shaped roof tube 12 Unit box-shaped roof tube 12a Corner-unit box-shaped roof tube 12b Side unit box-shaped roof pipe 12c Lower unit box-shaped roof pipe 13 Reaching shaft 14 Horizontal roof row 15 Vertical roof row 16 Joint portion 17 Box structure 18a, 18b Outer engagement piece 19a, 19b Inner engagement piece 20 Engagement piece 21 with flat cross-sectional shape Engagement piece 21a with triangular cross-sectional shape Oblique side 22 along diagonal direction of corner box-shaped roof tube Bolt fastening hole 23 Bolt member X Extrusion direction Y Diagonal outer side

Claims (2)

設置される函体構造物の外周形状に沿って、複数の矩形断面を有する箱形ルーフ管を、発進立坑から到達立坑に向けて掘進させることにより地中に並べて設置し、しかる後に、設置した複数の箱形ルーフ管と置き換えるようにして、発進立坑から到達立坑に向けて前記函体構造物を掘進させることにより地中に設置する箱形ルーフ工法において用いられ、
前記到達立坑に押し出された単位箱形ルーフ管の解体撤去を容易にする、横方向ルーフ列と縦方向ルーフ列との接合角部分に配置された角部箱形ルーフ管と、これの側方及び下方に隣接する側方箱形ルーフ管及び下方箱形ルーフ管との間の継手部の継手構造であって、
前記継手部は、隣接する一方の単位箱形ルーフ管の側面部に突出して設けられた一対の外側係合片と、他方の単位箱形ルーフ管の側面部に突出して設けられた一対の内側係合片とを係合することによって構成されており、
前記一対の外側係合片と前記一対の内側係合片との係合が、前記角部箱形ルーフ管と前記側方箱形ルーフ管との上下方向への相対的な位置ずれを拘束すると共に、前記角部箱形ルーフ管と前記下方箱形ルーフ管との左右方向への相対的な位置ずれを拘束するようになっており、且つ前記角部箱形ルーフ管の前記接合角部分から対角方向外側に向けた斜め上方への移動を干渉しないようになっている箱形ルーフ管の継手構造。
Along with the outer peripheral shape of the box structure to be installed, box-shaped roof pipes having a plurality of rectangular cross-sections are installed side by side by excavating from the starting shaft to the reaching shaft, and then installed. It is used in a box roof construction method that is installed in the ground by excavating the box structure from the starting shaft to the reaching shaft, so as to replace a plurality of box roof tubes,
A corner box-shaped roof pipe arranged at a joint angle portion between the horizontal roof row and the vertical roof row, which facilitates dismantling and removal of the unit box roof tube pushed out to the reach shaft, and a side thereof And a joint structure of a joint portion between a side box roof pipe and a lower box roof pipe adjacent to the lower box roof pipe,
The joint portion includes a pair of outer engaging pieces provided to project from the side surface of one adjacent unit box-shaped roof tube, and a pair of inner sides provided to project from the side surface of the other unit box-shaped roof tube. It is constituted by engaging the engagement piece,
Engagement between the pair of outer engagement pieces and the pair of inner engagement pieces restrains relative displacement in the vertical direction between the corner box roof tube and the side box roof tube. In addition, it restrains a relative positional shift in the left-right direction between the corner box roof tube and the lower box roof tube, and from the joint angle portion of the corner box roof tube. A box-shaped roof pipe joint structure that does not interfere with diagonally upward movement toward the diagonally outer side.
前記継手部における前記一対の外側係合片と前記一対の内側係合片との係合が、フラット断面形状の係合片による係合と、前記角部箱形ルーフ管の対角方向に沿った斜辺を有する3角形断面形状の係合片による係合とを組み合わせたものとなっており、且つ前記角部箱形ルーフ管と前記側方箱形ルーフ管との前記継手部と、前記角部箱形ルーフ管と前記下方箱形ルーフ管との前記継手部とで、前記3角形断面形状の係合片による係合と前記フラット断面形状の係合片による係合とが交互に配置されていることにより、前記角部箱形ルーフ管の前記接合角部分から対角方向外側に向けた斜め上方への移動を干渉しないようになっている請求項1に記載の箱形ルーフ管の継手構造。 The engagement between the pair of outer engagement pieces and the pair of inner engagement pieces in the joint portion is along the diagonal direction of the corner box-shaped roof pipe and the engagement by the engagement pieces having a flat cross-sectional shape. A combination of engagement with a triangular cross-sectional engagement piece having an oblique side, and the joint portion of the corner box roof tube and the side box roof tube, and the corner The engagement by the engagement piece having the triangular cross-sectional shape and the engagement by the engagement piece having the flat cross-sectional shape are alternately arranged at the joint portion of the partial box-shaped roof tube and the lower box-shaped roof tube. 2. The joint of the box-shaped roof pipe according to claim 1, wherein the corner-shaped roof pipe does not interfere with the diagonally upward movement diagonally outward from the joint corner portion of the corner box-shaped roof pipe. Construction.
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