JP2684352B2 - How to build underground structures - Google Patents
How to build underground structuresInfo
- Publication number
- JP2684352B2 JP2684352B2 JP22712695A JP22712695A JP2684352B2 JP 2684352 B2 JP2684352 B2 JP 2684352B2 JP 22712695 A JP22712695 A JP 22712695A JP 22712695 A JP22712695 A JP 22712695A JP 2684352 B2 JP2684352 B2 JP 2684352B2
- Authority
- JP
- Japan
- Prior art keywords
- underground structure
- jack
- hollow rectangular
- ready
- edge cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は道路や軌条を横断す
るようにして既製地下構造物の地下構造物を該道路や軌
条下に施工する地下構造物の築造方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an underground structure of a ready-made underground structure under a road or rail so as to cross the road or rail.
【0002】[0002]
【従来の技術】従来から、道路や軌条下を横断する地下
道や水路等を構築する方法としては、道路や軌条下を挟
んでその両側に適宜深さの発進立坑と到達立坑とを掘削
し、第10図に示すように、地盤aに接する側の一面に細
長板cを全長に亘って載置し、且つ該細長板cの先端を
その先端部に一体に固定させてなる角形パイプbを使用
してこの角形パイプbを発進立坑から到達立坑に向かっ
て計画地下構造物dの外周断面に沿うように並列状態に
打設したのち、既製の地下構造物をこれらの並列パイプ
よりなるパイプルーフの後端に接続させて発進立坑から
推進させ、細長板cを地下に残置したまゝパイプルーフ
を前進させると共に地下構造物内の土砂を掘削すること
により地下構造物を地中に埋設することが行われてい
る。2. Description of the Related Art Conventionally, as a method of constructing an underpass or a waterway that crosses a road or under a rail, excavating a starting shaft and a reaching shaft of appropriate depth on both sides of the road or under the rail, As shown in FIG. 10, a rectangular pipe b is formed by mounting an elongated plate c over the entire length on one surface in contact with the ground a, and fixing the tip end of the elongated plate c integrally to the tip end portion thereof. After using this rectangular pipe b in a parallel state from the starting shaft to the reaching shaft along the outer peripheral cross section of the planned underground structure d, the ready-made underground structure is constructed with these parallel pipes. The underground structure is buried in the ground by connecting it to the rear end and propelling it from the starting shaft, advancing the pipe roof with the elongated plate c left underground and excavating the earth and sand in the underground structure. Is being done.
【0003】このような地下構造物埋設方法において、
地下構造物を地中に圧入する手段としては地下構造物を
推進ジャッキで押圧する方法と、地下構造物の埋設到達
側から牽引する方法とがあるが、その押圧力や牽引力は
主として次の諸抵抗によって決定される。細長板と角
パイプとの接触抵抗力、パイプルーフの内側面と地盤
との接触抵抗力、地下構造物底面と地盤との接触抵抗
力、細長板と地下構造物との接触抵抗力、地下構造
物先端に刃口を設けた場合には、その刃口による切削抵
抗力。従って、押圧又は牽引によって生じる反力を支持
するための反力壁には、上記抵抗力の総和以上の耐力が
必要であり、このような接触抵抗力は地下構造物が大型
化する程、さらに地盤が粘性土である程大きくなる。In such an underground structure burying method,
There are two methods to press the underground structure into the ground: pressing the underground structure with a propulsion jack and pulling it from the landing side of the underground structure. Determined by resistance. Contact resistance between elongated plate and square pipe, contact resistance between inner surface of pipe roof and ground, contact resistance between bottom surface of underground structure and ground, contact resistance between elongated plate and underground structure, underground structure If a blade tip is provided at the tip of the object, the cutting resistance by that blade tip. Therefore, the reaction force wall for supporting the reaction force generated by pressing or pulling requires a proof stress equal to or more than the sum of the above-mentioned resistance forces, and such contact resistance force is further increased as the underground structure becomes larger. The larger the soil is, the larger the soil.
【0004】[0004]
【発明が解決しようとする課題】このため、従来の上記
地下構造物埋設方法によれば、上記抵抗力が総和的に増
大するために反力壁の構造が大型化して大規模な補助工
法を採用しなければならなくなり、その結果、多大な構
築費用を必要とするばかりでなく工期が長期化し、又、
地下構造物埋設後における反力壁の撤去に多くの時間と
労力を要する等の問題点があった。本発明はこのような
問題点を解消することを目的とした地下構造物の築造方
法を提供するものである。Therefore, according to the conventional underground structure burying method described above, since the resistance force is increased in total, the structure of the reaction wall becomes large and a large-scale auxiliary construction method is required. It has to be adopted, resulting in a long construction period as well as a great construction cost, and
There was a problem that it took much time and labor to remove the reaction wall after burying the underground structure. The present invention provides a method for constructing an underground structure aiming at solving such problems.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明による地下構造物の築造方法は、地盤に接す
る側の面に牽引部材を兼ねた縁切板をその先端のみを固
定した状態で全面的に載置してなる中空矩形パイプを発
進側から到達側に向かって計画地下構造物の少なくとも
側壁及び上床位置に複数本並列に埋設して門形状に並列
した矩形パイプ群を形成し、発進側においてこれらの中
空矩形パイプ列の後端に第1のジャッキを介して既製地
下構造物を当接させると共に全ての縁切板の後端を既製
地下構造物の後方に立設した可動反力受止壁部材を挿通
してその端部を牽引ジャッキに連結し、到達側において
各縁切板の先端の固定を中空矩形パイプから解いて到達
側地盤に支持させたのち、縁切板を残したまゝ上記第1
のジャッキで中空矩形パイプを順次押圧、前進させ、次
いで各第1のジャッキを収縮させると共に該収縮量に応
じて上記牽引ジャッキにより反力受止壁部材に反力を支
持させた状態で縁切板を牽引することによって上記可動
反力受止壁部材と共に既製地下構造物を前進させ、この
第1のジャッキの押圧と既製地下構造物の前進とを繰り
返し行って既製地下構造物をパイプと置換することを特
徴とするものである。In order to achieve the above object, in the method of constructing an underground structure according to the present invention, an edge cutting plate also serving as a traction member is fixed only to the tip of the edge cutting plate on the surface in contact with the ground. A plurality of hollow rectangular pipes placed in a state are buried in parallel from the start side to the arrival side at least on the side wall and upper floor position of the planned underground structure to form a group of rectangular pipes arranged in a gate shape. Then, on the starting side, the ready-made underground structures were brought into contact with the rear ends of these hollow rectangular pipe rows via the first jack, and the rear ends of all edge plates were erected at the rear of the ready-made underground structures. Insert the movable reaction force receiving wall member and connect its end to the towing jack, and at the arrival side, fix the tip of each edge cutting plate from the hollow rectangular pipe to support it on the arrival side ground, and then cut the edge. No. 1 above, leaving the plate
The hollow rectangular pipes are sequentially pushed and moved forward by the jacks, and then the first jacks are contracted, and the traction jacks are used in accordance with the contraction amount, and the reaction force is supported by the reaction force receiving wall member. By moving the plate, the ready-made underground structure is advanced together with the movable reaction force receiving wall member, and the pressing of the first jack and the advance of the ready-made underground structure are repeated to replace the ready-made underground structure with the pipe. It is characterized by doing.
【0006】[0006]
【発明の実施の形態】断面矩形状のパイプの地盤に接す
る側の面に載置している縁切板は、その先端を前記パイ
プの先端に固着しているので、縁切板をパイプと一体に
地盤に圧入することができ、このパイプを計画地下構造
物の少なくとも側壁及び上床位置に複数本、並列状態に
圧入したのち、上記縁切板の先端の固定を中空矩形パイ
プから解いて到達側地盤に支持させ、中空矩形パイプ列
の後端に第1のジャッキを介して既製地下構造物を当接
させた状態で該第1ジャッキを伸長させると、既製地下
構造物を反力受けとして中空矩形パイプ列が縁切板の下
面に摺接しながら円滑に前進する。一定長の前進後、第
1ジャッキを収縮させる。BEST MODE FOR CARRYING OUT THE INVENTION Since an edge cutting plate placed on a surface of a pipe having a rectangular cross section which is in contact with the ground has its tip fixed to the tip of the pipe, the edge cutting plate is referred to as a pipe. It can be press-fitted integrally into the ground, and after multiple pipes are press-fitted in parallel to at least the side wall and upper floor of the planned underground structure, the end of the edge plate is unfixed from the hollow rectangular pipe. When the first jack is extended while being supported by the side ground, and the prefabricated underground structure is in contact with the rear end of the hollow rectangular pipe array through the first jack, the prefabricated underground structure serves as a reaction force receiver. The row of hollow rectangular pipes smoothly advances while slidingly contacting the lower surface of the edging plate. After advancing for a certain length, the first jack is contracted.
【0007】一方、全ての縁切板の後端を発進側におい
て既製地下構造物の後方に立設した可動反力受止壁部材
を挿通してその端部を牽引ジャッキに連結しておき、反
力受止壁部材に反力を支持させた状態でこの牽引ジャッ
キで上記第1ジャッキの収縮量に応じて縁切板を牽引す
ると、縁切板はその先端を到達側の地盤に支持させてい
るので移動することはなく、牽引ジャッキの牽引によっ
て相対的に可動反力受止壁部材が前方に移動して既製地
下構造物を前進させる。一定長の既製地下構造物の前進
後、再び、第1ジャッキを伸長させて中空矩形パイプ列
を前進させ、次いで、該第1ジャッキを収縮させてその
収縮量に応じて牽引ジャッキを作動させることにより既
製地下構造物を前進させ、これを繰り返して中空矩形パ
イプ列と既製地下構造物とを置換するものである。さら
に、上記既製地下構造物を複数の分割既製地下構造物か
ら構成し、各々の分割既製地下構造物間に第2のジャッ
キを介装し、パイプ側のジャッキから順次作動させて分
割既製地下構造物を押圧、前進させるようにすれば、既
製地下構造物の推進、埋設作業がより一層、容易且つ正
確に行うことができる。On the other hand, the rear ends of all the edge cutting plates are inserted through a movable reaction force receiving wall member which is erected on the starting side at the rear of the ready-made underground structure, and the ends thereof are connected to the tow jack. When the edge cutting plate is pulled by this towing jack according to the contraction amount of the first jack with the reaction force receiving wall member supporting the reaction force, the edge cutting plate causes the tip of the edge cutting plate to be supported by the ground on the arrival side. Therefore, the movable reaction force receiving wall member relatively moves forward by the towing of the towing jack to advance the ready-made underground structure. After advancing a ready-made underground structure of a certain length, the first jack is extended again to advance the hollow rectangular pipe row, then the first jack is contracted, and the towing jack is operated according to the contraction amount. By this, the ready-made underground structure is advanced, and this is repeated to replace the hollow rectangular pipe array with the ready-made underground structure. Further, the above-mentioned ready-made underground structure is composed of a plurality of divided ready-made underground structures, a second jack is interposed between each of the divided ready-made underground structures, and the jacks on the pipe side are sequentially operated so that the ready-made underground structure is divided. If the object is pushed and moved forward, the propulsion and burying work of the ready-made underground structure can be performed more easily and accurately.
【0008】[0008]
【実施例】本発明の実施例を図面について説明すると、
軌条1の下に該軌条1を横断して既製地下構造物2を築
造する場合、まず、軌条1の一側を発進側3として他側
の到達側4に向かって断面四角形状の中空矩形パイプ5
を水平に圧入する。地盤6と接する中空矩形パイプ5の
外面には、図2及び図3に示すように、この中空矩形パ
イプ5と略同一平面形状の帯状鋼板よりなる縁切板7が
載置されてあり、この縁切板7の先端のみを中空矩形パ
イプの先端に溶接20等によって固着してある。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
When constructing a ready-made underground structure 2 across the rail 1 under the rail 1, first, one side of the rail 1 is a starting side 3 and a hollow rectangular pipe having a quadrangular cross section toward the arrival side 4 on the other side. 5
Press in horizontally. On the outer surface of the hollow rectangular pipe 5 which is in contact with the ground 6, as shown in FIGS. 2 and 3, an edge cutting plate 7 made of a strip steel plate having substantially the same plane as the hollow rectangular pipe 5 is placed. Only the tip of the edge cutting plate 7 is fixed to the tip of the hollow rectangular pipe by welding 20 or the like.
【0009】地盤6に対する中空矩形パイプ5の圧入
は、その内部にオーガー(図示せず)を挿入して地盤6
を掘削しながら行われ、一本の中空矩形パイプ5が発進
側3と到達側4間に埋設されると、この中空矩形パイプ
5の両側面に設けている係合突条5a、5bに、圧入すべき
次の中空矩形パイプの対向側面に突設している係合突条
5a又は5bを係合させながら埋設し、この作業を繰り返し
て図4、図5に示すように複数本の中空矩形パイプ5に
よって計画地下構造物の上床位置と両側部に亘って門形
状に並列した中空矩形パイプ群を形成する。こうして中
空矩形パイプ群を発進側3と到達側4間における地盤6
中に埋設したのち、発進側3の地表面に固定した基礎材
8上に反力受止壁部材9を前方に向かって移動自在に立
設する。The hollow rectangular pipe 5 is press-fitted into the ground 6 by inserting an auger (not shown) therein.
When one hollow rectangular pipe 5 is buried between the starting side 3 and the reaching side 4 while excavating, the engaging projections 5a, 5b provided on both side surfaces of the hollow rectangular pipe 5 are Engaging ridges protruding from opposite side surfaces of the next hollow rectangular pipe to be press-fitted
It is buried while engaging 5a or 5b, and this work is repeated, and as shown in FIGS. 4 and 5, a plurality of hollow rectangular pipes 5 are arranged in parallel in a gate shape over the upper floor position and both sides of the planned underground structure. Forming a group of hollow rectangular pipes. In this way, the hollow rectangular pipes are connected to the ground 6 between the starting side 3 and the reaching side 4.
After being embedded inside, the reaction force receiving wall member 9 is erected on the base material 8 fixed to the ground surface of the starting side 3 so as to be movable forward.
【0010】さらに、発進側3に突出した中空矩形パイ
プ群の外周に沿って図4に示すように、H形鋼等よりな
る正面門形状に連続した連結枠10を配設し、この連結枠
10に各中空矩形パイプ5の縁切板7の後端を溶接等の適
宜な手段によって一体に固定すると共に連結枠10と上記
反力受止壁部材9とをアンカー等の連結材11で連結す
る。Further, as shown in FIG. 4, a continuous front frame-shaped connecting frame 10 made of H-shaped steel or the like is arranged along the outer periphery of the hollow rectangular pipe group protruding toward the starting side 3, and this connecting frame is formed.
The rear end of the edge cutting plate 7 of each hollow rectangular pipe 5 is integrally fixed to 10 by an appropriate means such as welding, and the connecting frame 10 and the reaction force receiving wall member 9 are connected by a connecting member 11 such as an anchor. To do.
【0011】一方、到達側4に突出した全ての中空矩形
パイプ5の先端から縁切板7の先端の溶接20を切離して
縁切板7に対する中空矩形パイプ5の固定を解いたの
ち、図5に示すように、縁切板7の外周に沿うように立
設した鉄筋コンクリート製或いは鋼材製等の門形状の定
着枠12を計画地下構造物埋設地盤の端面に密着、支持さ
せると共に、該定着枠12に各縁切板7の先端を溶接等に
より一体的に固着する。On the other hand, after the welding 20 at the tip of the edging plate 7 is separated from the tips of all the hollow rectangular pipes 5 projecting to the arrival side 4, the fixation of the hollow rectangular pipe 5 to the edging plate 7 is released, and then FIG. As shown in FIG. 5, a gate-shaped anchoring frame 12 made of reinforced concrete or steel, which is erected along the outer periphery of the edging plate 7, is closely adhered to and supported by the end face of the planned underground structure buried ground, and the anchoring frame is also supported. The tip of each edging plate 7 is integrally fixed to 12 by welding or the like.
【0012】又、反力受止壁部材9の反力受止面に複数
本の推進ジャッキ13を取付け、この推進ジャッキ13と埋
設すべき既製地下構造物2の後端面間に押枠14を介在さ
せるようにする。さらに、既製地下構造物2の先端面と
中空矩形パイプ群の後端間に地下構造物2の断面外形寸
法に略等しいジャッキ枠15(図6参照)を介在させ、該
枠15の外周面側に各中空矩形パイプ5の縁切板7を摺接
させながら移動可能に構成すると共にこのジャッキ枠15
内には各中空矩形パイプ5の後端に対応して第1のジャ
ッキ16を配設している。A plurality of propulsion jacks 13 are attached to the reaction force receiving surface of the reaction force receiving wall member 9, and a pushing frame 14 is provided between the propulsion jacks 13 and the rear end surface of the prefabricated underground structure 2 to be buried. Make it intervene. Further, a jack frame 15 (see FIG. 6) having substantially the same cross-sectional outer size as the underground structure 2 is interposed between the front end surface of the ready-made underground structure 2 and the rear end of the hollow rectangular pipe group, and the outer peripheral surface side of the frame 15 The jack frame 15 is configured to be movable while slidingly contacting the edge cutting plate 7 of each hollow rectangular pipe 5.
A first jack 16 is provided inside the hollow rectangular pipe 5 corresponding to the rear end thereof.
【0013】なお、このようなジャッキ枠15を配するこ
となく、各中空矩形パイプ5と既製地下構造物2間に第
1のジャッキ16を直接連結してもよい。又、既製地下構
造物2は計画地下構造物を複数に分割した形状に形成さ
れている分割既製地下構造物である。The first jack 16 may be directly connected between each hollow rectangular pipe 5 and the prefabricated underground structure 2 without disposing such a jack frame 15. The ready-made underground structure 2 is a divided ready-made underground structure formed in a shape obtained by dividing the planned underground structure into a plurality of parts.
【0014】このように構成したので、ジャッキ枠15内
のジャッキ16を順次作動させて伸長させれば、中空矩形
パイプ5は縁切板7をガイドとして該縁切板7に摺接し
ながら順次その先端部が到達側4に突出する。全ての中
空矩形パイプ5を一定長さ押し進めたのち発進側3にお
いて推進ジャッキ13を作動させれば、既製地下構造物2
は押枠14を介して地盤6中に圧入され、ジャッキ16を収
縮しつつジャッキ枠15も前進する。推進ジャッキ13が伸
長して地下構造物2が一定長さだけ圧入されると、推進
ジャッキ13を収縮させ、次の押枠14を継ぎ足すように介
在させて再び地下構造物2の圧入を行う。With this construction, when the jacks 16 in the jack frame 15 are sequentially actuated and extended, the hollow rectangular pipe 5 slides in contact with the edge cutting plate 7 using the edge cutting plate 7 as a guide. The tip portion projects to the arrival side 4. After pushing all hollow rectangular pipes 5 to a certain length, if the propulsion jack 13 is operated on the starting side 3, the ready-made underground structure 2
Is press-fitted into the ground 6 through the push frame 14, and the jack frame 15 is advanced while the jack 16 is contracted. When the propulsion jack 13 is extended and the underground structure 2 is press-fitted by a certain length, the propulsion jack 13 is contracted, and the next push frame 14 is additionally provided to intervene to press-fit the underground structure 2 again. .
【0015】このように、推進ジャッキ13の押圧により
地下構造物2を前進させれば、その反力は反力受止壁部
材9に受止されてその作用力により該反力受止壁部材9
は後方に移動しようとするが、この反力受止壁部材9は
各中空矩形パイプ5の縁切板7の後端に連結材11を介し
て連結してあり、さらに、縁切板7の前端は到達側4に
おいて地盤6の端面に押接している定着枠12に連結して
いるので、縁切板7の外面と地盤6との摩擦力及び定着
枠12に対する地盤6の受圧力によって反力受止壁部材9
は一定位置に立設した状態でその反力を確実に受止す
る。Thus, when the underground structure 2 is moved forward by pressing the propulsion jack 13, the reaction force is received by the reaction force receiving wall member 9 and the reaction force thereof is applied to the reaction force receiving wall member. 9
Tries to move rearward, but the reaction force receiving wall member 9 is connected to the rear end of the edge cutting plate 7 of each hollow rectangular pipe 5 via a connecting member 11, and further, Since the front end is connected to the fixing frame 12 that is pressed against the end surface of the ground 6 on the arrival side 4, it is counteracted by the frictional force between the outer surface of the edge cutting plate 7 and the ground 6 and the pressure of the ground 6 against the fixing frame 12. Force receiving wall member 9
Securely receives the reaction force while standing upright at a certain position.
【0016】中空矩形パイプ群は中間ジャッキ16の押圧
によって一定長さ宛、到達側4に突出するが、その突出
部は適宜除去される。又、地下構造物2は、その外周面
を縁切板7の内面に摺接、ガイドされながら地盤6中に
圧入され、該地下構造物2内の土砂は適宜な手段によっ
て発進側3に掘削、排除される。The hollow rectangular pipe group is projected to the arrival side 4 for a certain length by the pressing of the intermediate jack 16, but the projecting portion is appropriately removed. The underground structure 2 is pressed into the ground 6 while the outer peripheral surface of the underground structure 2 is slidably contacted with the inner surface of the edging plate 7 and guided, and the earth and sand in the underground structure 2 is excavated to the starting side 3 by an appropriate means. Will be eliminated.
【0017】こうして、中空矩形パイプ群の押し出しと
該中空矩形パイプ群に後続する地下構造物2の圧入とを
行って一つの既製地下構造物2の圧入が完了すると、次
に図1に示すように、該既製地下構造物2の後端面に複
数本の第2ジャッキ17を介して次の既製地下構造物2を
接続し、この既製地下構造物2の後端を発進側3におい
て押枠14に受止させる。Thus, when the hollow rectangular pipe group is extruded and the underground structure 2 following the hollow rectangular pipe group is press-fitted to complete the press-fitting of one ready-made underground structure 2, as shown in FIG. Then, the next ready-made underground structure 2 is connected to the rear end surface of the ready-made underground structure 2 through a plurality of second jacks 17, and the rear end of the ready-made underground structure 2 is pushed by the pushing frame 14 at the starting side 3. To accept.
【0018】この状態で、ジャッキ枠15内の第1のジャ
ッキ16を順次伸長させて中空矩形パイプ5を前記同様に
縁切板7をガイドとして到達側4に突出させ、全ての中
空矩形パイプ5を一定長さ押し進めたのち、第2のジャ
ッキ17を一斉に伸長させて、後続する既製地下構造物2
側に反力を受止させた状態で既に圧入している先行既製
地下構造物2を到達側4に向かって前記第1のジャッキ
16による中空矩形パイプ群の前進長さだけ前進させる。
しかるのち、発進側3において推進ジャッキ13を作動さ
せ、第2のジャッキ17を収縮させながら後続する既製地
下構造物2を押枠14を介して先行する既製地下構造物2
の前進長だけ地盤6中に圧入する。In this state, the first jack 16 in the jack frame 15 is sequentially extended to project the hollow rectangular pipe 5 toward the arrival side 4 using the edge cutting plate 7 as a guide in the same manner as described above. After pushing for a certain length, the second jack 17 is extended all at once, and the succeeding ready-made underground structure 2
The first ready-made underground structure 2 already press-fitted in a state where the reaction force is received on the side toward the arrival side 4 is the first jack.
Advance by the advance length of the hollow rectangular pipe group by 16.
Then, the propulsion jack 13 is operated on the starting side 3 to contract the second jack 17 while the succeeding prefabricated underground structure 2 is preceded via the pushing frame 14
It is press-fitted into the ground 6 for the forward length of.
【0019】このように、第1のジャッキ16による中空
矩形パイプ群の押圧前進と第2のジャッキ17による先行
既製地下構造物2の前進、及び推進ジャッキ13による後
続既製地下構造物2の圧入とを順次繰り返し行って後続
する既製地下構造物2を地盤中に圧入し、この既製地下
構造物2の圧入が完了すると、再び該既製地下構造物2
に第2のジャッキ17を介して次の既製地下構造物2を接
続し、上記同様にして到達側4のジャッキから発進側の
ジャッキに向かって順に作動させて既製地下構造物2を
押圧、前進させる。As described above, the first jack 16 pushes forward the hollow rectangular pipe group, the second jack 17 advances the prefabricated underground structure 2, and the propulsion jack 13 press-fits the prefabricated underground structure 2. The prefabricated underground structure 2 is press-fitted into the ground by repeating the above procedure, and when the press-fitting of the prefabricated underground structure 2 is completed, the prefabricated underground structure 2 is again pressed.
To the next ready-made underground structure 2 via the second jack 17, and in the same manner as described above, the jacks on the arrival side 4 are sequentially operated toward the start-side jack to press the ready-made underground structure 2 to move forward. Let
【0020】この作業を繰り返し行って最前部の既製地
下構造物2が到達側4に達し、中空矩形パイプ群と地下
構造物とが置換されると、隣接する既製地下構造物2、
2間に介在した第2のジャッキ17を到達側4から順に撤
去し、この撤去により離間している既製地下構造物2、
2間を後続側のジャッキ17を作動させて前側の既製地下
構造物2の後端面に後側の既製地下構造物2の前端面を
当接させる。この作業を最後部の既製地下構造物にまで
繰り返し行って発進側3と到達側4間に一連の地下構造
物よりなる地下道を築造するものである。By repeating this work, the ready-made underground structure 2 at the forefront reaches the arrival side 4, and when the hollow rectangular pipe group and the underground structure are replaced, the adjacent ready-made underground structure 2,
The second jack 17 interposed between the two is removed in order from the arrival side 4, and the ready-made underground structure 2, which is separated by this removal,
The jack 17 on the trailing side is operated between the two to bring the front end surface of the ready-made underground structure 2 on the front side into contact with the rear end surface of the ready-made underground structure 2 on the front side. This work is repeated up to the last ready-made underground structure to build an underground passage consisting of a series of underground structures between the starting side 3 and the reaching side 4.
【0021】なお、各既製地下構造物2、2間に介在さ
せる第2のジャッキ17は、図7に示すように、既製地下
構造物2の外周端面と同一形状を有する中間函体18の前
端矩形枠18a にその前端部を当接させた状態で複数本取
付け、この中間函体18を隣接する既製地下構造物2、2
間に介在させて複数本のジャッキ17の後端を後続側の既
製地下構造物2の前端に当接させ、該ジャッキ17の作動
によって既製地下構造物2を押圧、前進させるようにし
てもよい。As shown in FIG. 7, the second jack 17 interposed between each of the ready-made underground structures 2 and 2 has a front end of an intermediate box 18 having the same shape as the outer peripheral end surface of the ready-made underground structure 2. A plurality of rectangular frames 18a are attached with their front ends in contact with each other.
The rear ends of the plurality of jacks 17 may be brought into contact with the front end of the prefabricated underground structure 2 on the trailing side by interposing therebetween, and the prefabricated underground structure 2 may be pressed and advanced by the operation of the jacks 17. .
【0022】この場合、複数本のジャッキ17の押圧力が
中間函体18の前端矩形枠18a を介して先行する既製地下
構造物2の後端全面に均一な押圧力として作用し、正確
な押圧が可能になると共にジャッキ17の使用本数を少な
くすることができる。又、ジャッキ17の撤去後における
既製地下構造物2、2同士の接合作業を行うことなく、
この中間函体18を既製地下構造物2の一部として使用す
ることができる。In this case, the pressing force of the plurality of jacks 17 acts as a uniform pressing force on the entire rear end of the preceding prefabricated underground structure 2 via the front end rectangular frame 18a of the intermediate box 18, and the accurate pressing is performed. And the number of jacks 17 used can be reduced. In addition, without performing the work of joining the ready-made underground structures 2 and 2 after removing the jack 17,
This intermediate box 18 can be used as a part of the ready-made underground structure 2.
【0023】以上の実施例においては、発進側3に推進
ジャッキ13を配設して押圧による既製地下構造物2の圧
入を行っているが、牽引による圧入方法を採用してもよ
い。即ち、図8はその牽引圧入方法を示すものであり、
上記実施例と同様にして軌条下の発進側3と到達側4間
における計画地下道の上床位置に、地盤に接する側の面
に縁切板7をその先端のみを固定した状態で全面的に載
置してなる複数本の中空矩形パイプ5を並列状態に圧
入、埋設したのち、到達側4の地盤端面に反力壁19をそ
の外周端面が中空矩形パイプ群の内周面に接するように
して配設する。In the above embodiment, the propulsion jack 13 is arranged on the starting side 3 to press the ready-made underground structure 2 by pressing, but a press-fitting method by towing may be adopted. That is, FIG. 8 shows the traction press-fitting method,
In the same manner as in the above-mentioned embodiment, the edge cutting plate 7 is mounted on the entire surface of the planned underpass between the starting side 3 and the reaching side 4 under the track, with the tip of the edge cutting plate 7 fixed to the surface in contact with the ground. After a plurality of hollow rectangular pipes 5 that are placed are press-fitted in parallel and embedded, a reaction wall 19 is attached to the ground end face of the reaching side 4 so that the outer peripheral end face of the hollow rectangular pipe group contacts the inner peripheral face of the hollow rectangular pipe group. Arrange.
【0024】さらに、発進側3と到達側4間の地盤に、
ワイヤロープ21を挿通しているシース管22を適宜な穿孔
装置を利用して並行に埋設し、発進側3において突出し
たワイヤロープ21の後端部を圧入すべき既製地下構造物
2の後端面に当接した支持板23に挿通固着する一方、到
達側4に突出したワイヤロープ21の前端部を反力壁19に
穿設した孔を通して反力壁19の前面に配設しているセン
ターホールジャッキ24に引出し自在に挿着する。この状
態で第1及び第2のジャッキ16、17を順次伸長させれ
ば、その反力は支持板23からワイヤロープ21を介して反
力壁19に支持されながら、上記実施例と同様に矩形パイ
プ5と既製地下構造物2とを順次押圧、前進させること
ができる。Furthermore, on the ground between the starting side 3 and the reaching side 4,
The rear end face of the ready-made underground structure 2 into which the sheath tube 22 through which the wire rope 21 is inserted is embedded in parallel using an appropriate punching device, and the rear end portion of the wire rope 21 protruding on the starting side 3 should be press-fitted. While being inserted and fixed to the support plate 23 that is in contact with the center, the front end portion of the wire rope 21 projecting to the arrival side 4 is provided in the front surface of the reaction wall 19 through the hole formed in the reaction wall 19. Insert it freely into the jack 24. In this state, if the first and second jacks 16 and 17 are sequentially extended, the reaction force is supported by the reaction force wall 19 from the support plate 23 via the wire rope 21 and is rectangular as in the above embodiment. The pipe 5 and the ready-made underground structure 2 can be sequentially pressed and moved forward.
【0025】既製地下構造物2の一定長さの前進が完了
すると、センタホールジャッキ24によりワイヤロープ21
を引張って最後部の既製地下構造物2を前進させる。
又、このような所定長の前進毎に、最前部の既製地下構
造物2内から地盤6を掘削、排除すると共にワイヤロー
プ21を残してシース管22を適宜長さ切除する。この作業
を順次繰り返し行って発進側3と到達側4間に一連の地
下構造物よりなる地下道を築造するものである。When the advance of the prefabricated underground structure 2 by a fixed length is completed, the wire rope 21 is moved by the center hole jack 24.
To advance the rearmost ready-made underground structure 2.
In addition, every time such a predetermined length of forward movement is performed, the ground 6 is excavated and removed from the frontmost prefabricated underground structure 2, and the sheath tube 22 is cut to an appropriate length while leaving the wire rope 21. By repeating this work in sequence, an underpass consisting of a series of underground structures is constructed between the starting side 3 and the reaching side 4.
【0026】なお、このような牽引手段は上記実施例に
採用することもでき、その場合にはこのワイヤロープ21
の牽引に変えて縁切板7を牽引部材として使用し、縁切
板7の後端連結枠10に連結している連結材11を反力受止
壁部材9を挿通すると共に該反力受止壁部材9の背面に
配設したセンターホールジャッキに引出し自在に挿着し
ておけばよい。Incidentally, such a pulling means can be adopted in the above-mentioned embodiment, and in this case, this wire rope 21
Instead of pulling, the edge cutting plate 7 is used as a pulling member, and the connecting member 11 connected to the rear end connecting frame 10 of the edge cutting plate 7 is inserted through the reaction force receiving wall member 9 and the reaction force receiving wall member 9 is inserted. It may be inserted in a center hole jack provided on the back surface of the stop wall member 9 so as to be freely drawn out.
【0027】既製地下構造物2の埋設完了後における第
2のジャッキ17の撤去等については上記実施例と同様で
あるが、最前部の既製地下構造物2の前端面に刃口25を
一体に突設しておけば、既製地下構造物2の前進が容易
になると共に地盤6も同時に掘削しながら前進させるこ
とができる。The removal of the second jack 17 after the completion of the burial of the ready-made underground structure 2 is the same as in the above-mentioned embodiment, but the cutting edge 25 is integrally formed on the front end surface of the ready-made underground structure 2 at the forefront. If it is provided so as to project, the ready-made underground structure 2 can be easily advanced, and the ground 6 can be simultaneously advanced while excavating.
【0028】[0028]
【発明の効果】以上のように本発明の地下構造物の築造
方法によれば、地盤に接する側の面に牽引部材を兼ねた
縁切板をその先端のみを固定した状態で全面的に載置し
てなる中空矩形パイプを発進側から到達側に向かって計
画地下構造物の少なくとも側壁及び上床位置に複数本並
列に埋設して門形状に並列した矩形パイプ群を形成し、
発進側においてこれらの中空矩形パイプ列の後端に第1
のジャッキを介して既製地下構造物を当接させると共に
全ての縁切板の後端を既製地下構造物の後方に立設した
可動反力受止壁部材を挿通してその端部を牽引ジャッキ
に連結し、到達側において各縁切板の先端の固定を中空
矩形パイプから解いて到達側地盤に支持させたのち、縁
切板を残したまゝ上記第1のジャッキで中空矩形パイプ
を順次押圧、前進させ、次いで各第1のジャッキを収縮
させると共に該収縮量に応じて上記牽引ジャッキにより
反力受止壁部材に反力を支持させた状態で縁切板を牽引
することによって上記可動反力受止壁部材と共に既製地
下構造物を前進させ、この第1のジャッキの押圧と既製
地下構造物の前進とを繰り返し行って既製地下構造物を
パイプと置換することを特徴とするものであるから、第
1ジャッキの押圧により前進する中空矩形パイプは地盤
に接することなく地中に残置される縁切板の下面に摺接
しながら前進するので、地盤と接触するよりも抵抗力が
極めて小さくなると共に既製地下構造物もこれらの縁切
板をガイドとして推進するので、両者の接触抵抗力が著
しく減少し、粘性の地盤でも容易に既製地下構造物を推
進させながら築造できるものである。As described above, according to the method for constructing an underground structure of the present invention, an edge cutting plate also serving as a traction member is entirely mounted on the surface in contact with the ground with only its tip fixed. A plurality of hollow rectangular pipes placed in parallel with each other are embedded in at least the side wall and the upper floor of the planned underground structure from the starting side toward the reaching side to form a group of rectangular pipes arranged in a gate shape.
On the starting side, the first of the hollow rectangular pipe rows at the rear end
The ready-made underground structure is abutted via the jack of and the movable reaction force receiving wall member standing upright at the rear of all the edge cutting plates is inserted through the rear end of the edge-cutting plate and the end is pulled. After unfastening the tip of each edge cutting plate from the hollow rectangular pipe on the arrival side to support it on the ground on the arrival side, the first rectangular jack sequentially presses the hollow rectangular pipes while leaving the edge cutting plate. , Forwardly, and then contracts each first jack, and pulls the edge cutting plate in a state in which the reaction force receiving wall member supports the reaction force by the pulling jack in accordance with the amount of contraction, and thereby the movable counter plate is moved. It is characterized in that the ready-made underground structure is advanced together with the force receiving wall member, and the pressing of the first jack and the advance of the ready-made underground structure are repeated to replace the ready-made underground structure with a pipe. From the pressing of the first jack The hollow rectangular pipe that advances further moves forward while making sliding contact with the lower surface of the edge plate that remains in the ground without contacting the ground, so the resistance force is much smaller than when it contacts the ground, and ready-made underground structures also Since the edge cutting plate of No. 2 is used as a guide, the contact resistance between the two is significantly reduced, and it is possible to easily build an already-fabricated underground structure while promoting it even on viscous ground.
【0029】さらに、前端を到達側の地盤に支持させて
いる全ての縁切板の後端を発進側において既製地下構造
物の後方に立設した可動反力受止壁部材を挿通してその
端部を牽引ジャッキに連結しておき、反力受止壁部材に
反力を支持させた状態でこの牽引ジャッキで上記第1ジ
ャッキの収縮量に応じて縁切板を牽引するものであるか
ら、この縁切板を牽引部材に利用して牽引ジャッキの作
動により、可動反力受止壁部材を介して既製地下構造物
を円滑に前進させることができ、反力受けの構造を小規
模に形成できて補助工法が不要となると共にこのような
小規模な反力受けによって大断面の地下構造物や長さの
大なる地下構造物であっても円滑に埋設することができ
るものである。Further, the movable reaction force receiving wall member erected upright behind the ready-made underground structure is inserted through the rear ends of all edge cutting plates whose front ends are supported by the ground on the arrival side on the starting side. Since the end portion is connected to the towing jack and the reaction force is supported by the reaction force receiving wall member, the edge cutting plate is pulled by the towing jack according to the contraction amount of the first jack. By using this edge cutting plate as a towing member, the operation of the towing jack can smoothly advance the ready-made underground structure through the movable reaction force receiving wall member, thus reducing the structure of the reaction force receiving on a small scale. It is possible to form the structure without the need for an auxiliary construction method, and by receiving such a small reaction force, it is possible to smoothly bury even an underground structure having a large cross section or an underground structure having a large length.
【0030】又、上記既製地下構造物の複数の分割既製
地下構造物から構成し、各々の分割地下構造物間に第2
のジャッキを介装し、中空矩形パイプ側のジャッキから
順次作動させて分割地下構造物を押圧、前進させるよう
にすれば、既製地下構造物の推進、埋設作業がより一層
小規模な手段によって容易に且つ正確に行うことができ
るものである。Further, the above-mentioned prefabricated underground structure is composed of a plurality of divided prefabricated underground structures.
By inserting the jack of the above, and pressing the hollow underground pipe side sequentially to push and advance the divided underground structure, it is easy to promote the prefabricated underground structure and bury it by a smaller means. It can be done accurately and accurately.
【図面の簡単な説明】[Brief description of the drawings]
【図1】地下構造物を圧入している状態の一部縦断簡略
側面図、FIG. 1 is a simplified side view of a partially longitudinal section of an underground structure press-fitted.
【図2】中空矩形パイプの一部の縦断側面図、FIG. 2 is a vertical sectional side view of a part of a hollow rectangular pipe,
【図3】その縦断正面図、FIG. 3 is a vertical sectional front view thereof,
【図4】発進側から見た背面図、FIG. 4 is a rear view seen from the starting side,
【図5】到達側から見た正面図、FIG. 5 is a front view seen from the arrival side,
【図6】ジャッキ枠の斜視図、FIG. 6 is a perspective view of a jack frame,
【図7】中間函体の斜視図、FIG. 7 is a perspective view of an intermediate box,
【図8】既製地下構造物を牽引により圧入している状態
の簡略縦断側面図、FIG. 8 is a simplified vertical sectional side view showing a state in which a ready-made underground structure is press-fitted by traction,
【図9】その正面図、FIG. 9 is a front view thereof,
【図10】従来工法を説明するための簡略縦断正面図。FIG. 10 is a simplified vertical sectional front view for explaining a conventional method.
2 既製地下構造物 3 発進側 4 到達側 5 中空矩形パイプ 7 縁切板 9 可動反力受止壁部材 16 第1のジャッキ 24 センターホールジャッキ 2 Ready-made underground structure 3 Start side 4 Arrival side 5 Hollow rectangular pipe 7 Edge cutting plate 9 Movable reaction force receiving wall member 16 First jack 24 Center hole jack
Claims (1)
縁切板をその先端のみを固定した状態で全面的に載置し
てなる中空矩形パイプを発進側から到達側に向かって計
画地下構造物の少なくとも側壁及び上床位置に複数本並
列に埋設して門形状に並列した矩形パイプ群を形成し、
発進側においてこれらの中空矩形パイプ列の後端に第1
のジャッキを介して既製地下構造物を当接させると共に
全ての縁切板の後端を既製地下構造物の後方に立設した
可動反力受止壁部材を挿通してその端部を牽引ジャッキ
に連結し、到達側において各縁切板の先端の固定を中空
矩形パイプから解いて到達側地盤に支持させたのち、縁
切板を残したまゝ上記第1のジャッキで中空矩形パイプ
を順次押圧、前進させ、次いで各第1のジャッキを収縮
させると共に該収縮量に応じて上記牽引ジャッキにより
反力受止壁部材に反力を支持させた状態で縁切板を牽引
することによって上記可動反力受止壁部材と共に既製地
下構造物を前進させ、この第1のジャッキの押圧と既製
地下構造物の前進とを繰り返し行って既製地下構造物を
パイプと置換することを特徴とする地下構造物の構築方
法。1. A hollow rectangular pipe in which an edge cutting plate also serving as a traction member is entirely mounted on a surface in contact with the ground with only its tip fixed, is planned from the starting side to the reaching side. A plurality of rectangular pipes are embedded in parallel in at least the side wall and upper floor position of the underground structure to form a gate-shaped parallel pipe,
On the starting side, the first of the hollow rectangular pipe rows at the rear end
The ready-made underground structure is abutted via the jack of and the movable reaction force receiving wall member standing upright at the rear of all the edge cutting plates is inserted through the rear end of the edge-cutting plate and the end is pulled. After unfastening the tip of each edge cutting plate from the hollow rectangular pipe on the arrival side to support it on the ground on the arrival side, the first rectangular jack sequentially presses the hollow rectangular pipes while leaving the edge cutting plate. , Forwardly, and then contracts each first jack, and pulls the edge cutting plate in a state in which the reaction force receiving wall member supports the reaction force by the pulling jack in accordance with the amount of contraction, and thereby the movable counter plate is moved. An underground structure characterized by advancing an existing underground structure together with a force receiving wall member, and repeating the pressing of the first jack and the advance of the existing underground structure to replace the underground structure with a pipe. How to build.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22712695A JP2684352B2 (en) | 1995-08-11 | 1995-08-11 | How to build underground structures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP22712695A JP2684352B2 (en) | 1995-08-11 | 1995-08-11 | How to build underground structures |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP63123234A Division JPH0663419B2 (en) | 1988-05-19 | 1988-05-19 | How to build an underground structure |
Publications (2)
Publication Number | Publication Date |
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JPH08170487A JPH08170487A (en) | 1996-07-02 |
JP2684352B2 true JP2684352B2 (en) | 1997-12-03 |
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JP22712695A Expired - Lifetime JP2684352B2 (en) | 1995-08-11 | 1995-08-11 | How to build underground structures |
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JP (1) | JP2684352B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110031173B (en) * | 2018-07-16 | 2020-09-15 | 中建六局土木工程有限公司 | High-precision heavy rail embedded part construction method |
CN111335919A (en) * | 2020-03-20 | 2020-06-26 | 重庆渝高科技产业(集团)股份有限公司 | Prefabricated pipe joint pushing method |
-
1995
- 1995-08-11 JP JP22712695A patent/JP2684352B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
基礎工、vol.14、No.2(1986)、(株)総合土木研究所、p.135 |
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JPH08170487A (en) | 1996-07-02 |
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