JP2006226036A

JP2006226036A - Shield boring machine and execution method of underground structure

Info

Publication number: JP2006226036A
Application number: JP2005042888A
Authority: JP
Inventors: Nobuyuki Takamatsu; 高松伸行; Masakazu Gairi; 外裏雅一; Takayuki Makita; 蒔田高之; Takahisa Ida; 井田隆久; Koji Ninomiya; 二宮康治; Toshiaki Oku; 奥利明; Masashi Kaneko; 金子正士; Masayoshi Iwahashi; 岩橋正佳; Yoshimitsu Kumao; 熊尾義光
Original assignee: JDC Corp; Zenitaka Corp; Mitsubishi Heavy Industries Ltd; Sumitomo Metal Industries Ltd; Penta Ocean Construction Co Ltd; Tokyu Construction Co Ltd; Fudo Construction Co Ltd; Sumitomo Mitsui Construction Co Ltd
Current assignee: JDC Corp; Zenitaka Corp; Mitsubishi Heavy Industries Ltd; Nippon Steel Corp; Penta Ocean Construction Co Ltd; Tokyu Construction Co Ltd; Fudo Tetra Corp; Sumitomo Mitsui Construction Co Ltd
Priority date: 2005-02-18
Filing date: 2005-02-18
Publication date: 2006-08-31

Abstract

PROBLEM TO BE SOLVED: To enable execution economically by easily using a shield boring machine for another purpose in constructing an underground structure having a large section. SOLUTION: The shield boring machine comprises an operational cylindrical part forming a work pit while assembling segments and a frame forming part arranged in radial direction relative to a central axis of the operational cylindrical part. A frame block of the underground structure is formed by pushing out a block unit from the operational cylindrical part to the frame forming part. COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は大断面トンネル、地下河川、地下貯槽等の地下構造物の躯体を構築する、シールド掘進機と地下構造物の施工方法に関するものである。
The present invention relates to a shield machine and a construction method for an underground structure for constructing a frame of an underground structure such as a large section tunnel, an underground river, and an underground storage tank.

近時地下空間の有効活用を図る観点から、河川や貯槽、或いは道路、鉄道用トンネル等の大型の地下構造物を構築する計画が進められている。
この種の施工に際しては開削工法、パイプルーフ工法、シールド工法、山岳トンネル工法の採用が試みられているが、各工法ともに大型の地下構造物の施工に転用するには問題があった。
そこでこれらの工法の問題を解決したものとして、平行に配置した一対の筒体シールド掘進機の間を、箱状の中間シールド掘進機で連結した構成のシールド掘進機を使用する工法が開発されている。
このシールド掘進機は、一回の施工で地下構造物のすべてを構築するのではなく、地下構造物のたとえば天井部分だけを構築する。次の施工では床部分、あるいは壁部分を構築するといった施工を繰り返すことによって大断面の地下構造物の全体を構築する工法である。
特開平７−２９３１９０号公報 From the viewpoint of effective utilization of underground space recently, plans are underway to construct large underground structures such as rivers, storage tanks, roads, and railway tunnels.
In this type of construction, attempts have been made to adopt the open-cut method, pipe roof method, shield method, and mountain tunnel method, but each method has problems in diverting to construction of large underground structures.
Therefore, as a solution to these problems, a method using a shield machine with a configuration in which a pair of cylindrical shield machines placed in parallel is connected by a box-shaped intermediate shield machine has been developed. Yes.
This shield machine does not construct all of the underground structure in a single construction, but constructs only the ceiling portion of the underground structure, for example. In the next construction, it is a construction method that constructs the whole of the underground structure with a large cross section by repeating construction such as constructing a floor part or a wall part.
JP 7-293190 A

前記した文献記載の地下構造物を構築する工法はすぐれた点を備えているが次のような問題点もあった。
＜１＞大断面の地下構造物の天井部分や床部分を、一度のシールド掘進機の通過によって構築する構成である。そのために大型のシールド掘進機が必要となり、簡単に転用することが困難であった。
＜２＞一度に大型の天井や床、壁を構築することができるが、構築した各部分を連結する技術については開発の余地を残していた。
The construction method for constructing an underground structure described in the above literature has excellent points, but has the following problems.
<1> The construction is such that the ceiling and floor of an underground structure with a large cross section are constructed by passing a shield machine once. For this reason, a large shield machine is required, and it is difficult to easily convert it.
<2> Large ceilings, floors, and walls can be constructed at one time, but there was room for development of technology to connect the constructed parts.

上記の課題を解決するために本発明は、地下構造物の躯体の一部を構築するシールド掘進機であって、セグメントを組み立てながら、作業坑を形成する作業筒部と、作業筒部の中心軸に対して放射する方向に配置した躯体形成部とにより構成し、作業筒部と躯体形成部との前面には掘進用のカッターを設置し、作業筒部と躯体形成部との内部空間は連通して構成し、作業筒部から躯体形成部へ、ブロック単体を押し出して地下構造物の躯体ブロックを形成できるように構成したシールド掘進機を特徴とするものである。 In order to solve the above problems, the present invention is a shield excavator that constructs a part of a frame of an underground structure, and forms a work pit while assembling segments, and a center of the work cylinder It is composed of a housing forming part arranged in a direction radiating with respect to the shaft, and a cutter for excavation is installed in front of the working cylinder part and the housing forming part, and the internal space between the working cylinder part and the housing forming part is It is characterized by a shield machine that is configured to communicate and configured to extrude a single block from a work cylinder portion to a housing forming portion to form a housing block of an underground structure.

さらに本発明は、地下構造物の躯体の一部を構築するシールド掘進機であって、セグメントを組み立てながら、作業坑を形成する作業筒部と、
作業筒部の中心軸に対して放射する方向に配置した躯体形成部とにより構成し、躯体形成部は、作業筒部から水平方向と鉛直方向の二方向へ向けて取り付け、作業筒部と躯体形成部との前面には掘進用のカッターを設置し、作業筒部と躯体形成部との内部空間は連通して構成し、作業筒部から躯体形成部へ、ブロック単体を押し出して地下構造物の躯体ブロックを形成できるように構成したシールド掘進機を特徴とするものである。 Furthermore, the present invention is a shield machine that constructs a part of the frame of an underground structure, and a work cylinder part that forms a work mine while assembling segments,
The casing forming portion is arranged in a direction radiating with respect to the central axis of the working cylinder portion, and the casing forming portion is attached from the working cylinder portion in two directions of the horizontal direction and the vertical direction. A cutter for excavation is installed in front of the forming part, and the internal space between the work cylinder part and the chassis forming part is configured to communicate, and the block unit is pushed out from the work cylinder part to the chassis forming part to underground structure It is characterized by a shield machine configured so as to be able to form a housing block.

さらに本発明は、請求項１記載のシールド掘進機を使用し、このシールド掘進機の躯体形成部をほぼ水平方向に配置して掘削することによって第一の躯体ブロックを構築し、上記のシールド掘進機と、鉛直軸対称型のシールド掘進機を使用し、そのシールド掘進機の躯体形成部をほぼ水平方向に配置して掘削することによって第二の躯体ブロックを構築し、第一の躯体ブロックの自由端部と、第二の躯体ブロックの自由端部とを接近させて配置し、躯体ブロックの自由端部の間隔は、掘削して間隔を連結して地下構造物の躯体の天井部を形成し、同様の工程によって、地下構造物の躯体の床部を形成し、天井部と床部の作業坑の間は、地中を鉛直に掘削して壁面部を形成して行う、地下構造物の構築方法を特徴とするものである Furthermore, the present invention uses the shield machine according to claim 1 and constructs a first chassis block by excavating the chassis formation part of the shield machine in a substantially horizontal direction, and the above shield machine And a vertical axisymmetric shield machine, and the second chassis block is constructed by digging with the shield forming machine's chassis forming part arranged almost horizontally. The free end and the free end of the second housing block are placed close to each other, and the space between the free ends of the housing block is excavated and connected to form the ceiling of the housing of the underground structure In the same way, the floor of the underground structure is formed, and between the ceiling and floor working pits, the underground is excavated vertically to form wall surfaces. Is characterized by the construction method of

さらに本発明は、請求項２記載のシールド掘進機を使用し、このシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第一の躯体ブロックを構築し、上記のシールド掘進機と、鉛直軸対称型のシールド掘進機を使用し、そのシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第二の躯体ブロックを構築し、以上の工程を、水平軸を対象状態で施工して、第三、第四の躯体ブロック６Ｄを構築し、各躯体ブロックの自由端部を接近させて配置し、各躯体ブロックの自由端部の間隔は、掘削して間隔を連結して地下構造物の躯体を形成する、地下構造物の構築方法を特徴とするものである。 Further, the present invention uses the shield machine according to claim 2 and digs by arranging the horizontal frame forming part of the shield machine in a substantially horizontal direction and the vertical frame forming part in a substantially vertical direction. Build the first frame block, use the above shield machine and the vertical axisymmetric shield machine, arrange the horizontal frame forming part of the shield machine almost horizontally, and set the vertical frame forming part The second housing block is constructed by excavating in a substantially vertical direction, and the above steps are performed with the horizontal axis in the target state to construct the third and fourth housing blocks 6D. It is characterized by the construction method of an underground structure in which the free ends of the blocks are arranged close to each other, and the space between the free ends of each frame block is excavated to connect the spaces to form the frame of the underground structure. Is.

さらに本発明は、請求項１記載のシールド掘進機を使用し、このシールド掘進機によって第一の躯体ブロックの作業坑と連結覆工体を構築し、第一の躯体ブロックの作業坑のセグメントの一部には、軟切削セグメントを使用し、上記のシールド掘進機と、鉛直軸、あるいは水平軸と対象型のシールド掘進機を使用して、第二の躯体ブロックを構築し、第二の躯体ブロックの掘進に際しては、先行した第一の躯体ブロックの作業坑の軟切削セグメントを切削して行い、同様の掘進を繰り返して地下構造物の躯体を形成する、地下構造物の構築方法を特徴とするものである。 Furthermore, the present invention uses the shield machine according to claim 1 and constructs a work pit and a connecting lining body of the first frame block by the shield machine, and the segment of the work mine segment of the first frame block. In part, using soft cutting segments, construct the second chassis block using the shield shield machine described above and the vertical axis or horizontal axis and target type shield machine. When digging a block, the soft cutting segment of the work pit of the preceding first skeleton block is cut and the same digging is repeated to form the underground structure skeleton. To do.

さらに本発明は、請求項２記載のシールド掘進機を使用し、このシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第一の躯体ブロックを構築し、上記のシールド掘進機と、点対称型のシールド掘進機を使用し、そのシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第二の躯体ブロックを構築し、各躯体ブロックの自由端部を接近させて配置し、各躯体ブロックの自由端部の間隔は、掘削して間隔を連結して地下構造物の躯体を形成する、地下構造物の構築方法を特徴とするものである。 Further, the present invention uses the shield machine according to claim 2 and digs by arranging the horizontal frame forming part of the shield machine in a substantially horizontal direction and the vertical frame forming part in a substantially vertical direction. Build the first chassis block, use the above shield machine and the point-symmetric shield machine, arrange the horizontal chassis forming part of the shield machine almost horizontally, and make the vertical chassis forming part almost The second frame block is constructed by excavating in the vertical direction, and the free ends of each frame block are placed close to each other, and the intervals between the free ends of each frame block are excavated and linked. Thus, the construction method of the underground structure is characterized by forming an underground structure structure.

さらに本発明は、請求項１記載のシールド掘進機を使用し、このシールド掘進機の躯体形成部をほぼ水平方向に配置して掘削することによって第一の躯体ブロックを構築し、上記のシールド掘進機と、鉛直軸対称型のシールド掘進機を使用し、そのシールド掘進機の躯体形成部をほぼ水平方向に配置して掘削することによって第二の躯体ブロックを構築し、第一と第二の躯体ブロックの自由端は接近して配置し、請求項２記載のシールド掘進機を使用し、このシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第三の躯体ブロックを構築し、上記のシールド掘進機と、鉛直軸対称型のシールド掘進機を使用し、
そのシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第四の躯体ブロック６Ｄを構築し、第三、第四の躯体ブロック６Ｄの自由端は、第一、第二の躯体ブロックの作業坑に接近させて配置する、地下構造物の構築方法を特徴とするものである。 Furthermore, the present invention uses the shield machine according to claim 1 and constructs a first chassis block by excavating the chassis formation part of the shield machine in a substantially horizontal direction, and the above shield machine And a vertical axisymmetric shield machine, and the second chassis block is constructed by excavating the shield-forming machine's chassis formation part in a substantially horizontal direction. The free end of the frame block is arranged close to the other, and the shield machine according to claim 2 is used. The horizontal frame forming part of the shield machine is arranged in a substantially horizontal direction, and the vertical frame forming part is arranged in a substantially vertical direction. By arranging and excavating to build a third housing block, using the above shield machine and the vertical axis symmetrical shield machine,
The horizontal housing forming part of the shield machine is arranged in a substantially horizontal direction, and the fourth housing block 6D is constructed by excavating the vertical housing forming part in a substantially vertical direction, and the third and fourth housings are constructed. The free end of the block 6D is characterized by the construction method of the underground structure that is arranged close to the work pits of the first and second housing blocks.

さらに本発明は、請求項１記載のシールド掘進機を使用し、このシールド掘進機の躯体形成部をほぼ水平方向に配置して掘削することによって第一の躯体ブロックを構築し、上記のシールド掘進機と、鉛直軸対称型のシールド掘進機を使用し、そのシールド掘進機の躯体形成部をほぼ水平方向に配置して掘削することによって第二の躯体ブロックを構築し、第一と第二の躯体ブロックの自由端は接近させて配置し、第一、第二の躯体ブロックの作業坑のセグメントの一部には、軟切削セグメントを使用し、請求項２記載のシールド掘進機を使用し、このシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、
鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第三の躯体ブロックを構築し、第三の躯体ブロックの掘進に際しては、先行した第一の躯体ブロックの作業坑の軟切削セグメントを切削して行い、上記のシールド掘進機と、鉛直軸対称型のシールド掘進機を使用し、そのシールド掘進機の水平躯体形成部をほぼ水平方向に配置し、鉛直躯体形成部をほぼ鉛直方向に配置して掘削することによって第四の躯体ブロック６Ｄを構築し、第四の躯体ブロック６Ｄの掘進に際しては、先行した第二の躯体ブロックの作業坑の軟切削セグメントを切削して行い、第三、第四の躯体ブロック６Ｄの自由端は、接近させて配置し、間隔を掘削して連結して地下構造物の躯体を形成する、地下構造物の構築方法を特徴とするものである。
Furthermore, the present invention uses the shield machine according to claim 1 and constructs a first chassis block by excavating the chassis formation part of the shield machine in a substantially horizontal direction, and the above shield machine And a vertical axisymmetric shield machine, and the second chassis block is constructed by excavating the shield-forming machine's chassis formation part in a substantially horizontal direction. The free end of the frame block is disposed close to the working block segment of the first and second frame blocks using a soft cutting segment, and the shield machine according to claim 2, The horizontal housing forming part of this shield machine is arranged almost horizontally,
The third housing block is constructed by excavating with the vertical housing forming portion arranged in a substantially vertical direction. When the third housing block is advanced, the soft cutting segment of the work well of the preceding first housing block is constructed. Use the above-mentioned shield machine and a vertical axisymmetric shield machine, and arrange the horizontal body forming part of the shield machine in a substantially horizontal direction and the vertical body forming part in a substantially vertical direction. The fourth housing block 6D is constructed by arranging and excavating, and when the fourth housing block 6D is advanced, the soft cutting segment of the work well of the preceding second housing block is cut, The free end of the fourth frame block 6D is characterized by a method for constructing an underground structure in which the free ends of the fourth structure block 6D are arranged close to each other and excavated and connected to form a structure of the underground structure.

本発明は以上説明したようになるから次のような効果を得ることができる。
＜イ＞大断面の地下構造物の一部を一度に施工するのではなく、たとえば天井部分を複数回に分けて施工する装置、工法が中心であるから、天井部分の施工に使用したシールド掘進機を、次には床部分の施工に転用するといった使用が容易であって経済的に地下構造物を構築することができる。
＜ロ＞地中において、先行して構築した部分と、後から構築した部分とを接続する方法が明確になったので、迅速に地下構造物を構築することができる。
Since the present invention is as described above, the following effects can be obtained.
 Rather than constructing a large section of an underground structure at one time, for example, the equipment and method of construction that divides the ceiling part into multiple parts are mainly used. An underground structure can be constructed economically because it is easy to use the machine and then to divert the floor part.
 In the ground, since the method of connecting the part constructed in advance and the part constructed later is clarified, the underground structure can be constructed quickly.

以下図面を参照しながら本発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.

＜１＞鍵穴型シールド掘進機。（図１）
地下構造物の躯体の一部を構築するシールド掘進機１である。
このシールド掘進機１は、鋼製の外郭体であり、作業筒部２と、躯体形成部３とによって構成する。
作業筒部２は円筒状の筒体であり、その作業筒部の中心軸に対して放射する方向に延長した矩形箱状の躯体形成部３とによって構成する。
作業筒部２、および躯体形成部３の前面には回転カッター４を備える。
作業筒部２は円筒であるから、円盤状の回転カッター４を使用できる。
躯体形成部３は矩形であるから、円盤状の回転軸から放射方向に刃が出入りするタイプの公知のコピーカッター４を使用すると良好な掘削ができる。
さらに躯体形成部３に多数設けたカッター４においては、隣り合うカッター４を前後にずれて配設すれば、良好な全面の掘削ができる。
作業筒部２では円弧状のセグメントを円筒状に組み立てて、作業坑５を形成する。
円弧状のセグメントは、作業筒を通して台車によって坑外から搬入する。
掘削土砂も、作業坑５に設置した泥水泥土の給排路を通して坑外に排出する。
作業筒部２のセグメントの組み立ては従来のシールド掘進機と同様に、セグメントを把持して伸縮するエレクターによって行う。
円筒状に組み立てたセグメントが、地下構造物の躯体の交点の作業坑５を形成する。
躯体形成部３では、セグメントを組み立てる必要はなく、単なる矩形の単体ブロックを接続して躯体ブロック６を形成してゆく。
すなわち矩形の単体ブロックの連続体が、躯体ブロック６となり、この躯体ブロック６が地下構造物の躯体の一部を形成する。
シールド掘進機１は作業坑５、および躯体ブロック６に反力をとってジャッキを伸張しながら外郭体が前進してゆく。
この躯体ブロック６の端面を、自由端部６３とよぶ。
作業筒部２と躯体形成部３との内部空間は連通しており、作業筒部２に横断方向に向けて設置したジャッキによって、躯体形成部３へ躯体の単体ブロックを押し出すことができるように構成してある。
以下、説明の便宜上、図１に示す本実施例のシールド機を「鍵穴型」と称する。
<1> Keyhole shield machine. (Figure 1)
It is the shield machine 1 which constructs a part of the frame of an underground structure.
The shield machine 1 is a steel outer body, and includes a work cylinder portion 2 and a housing forming portion 3.
The work tube portion 2 is a cylindrical tube body, and is constituted by a rectangular box-shaped housing forming portion 3 extending in a direction radiating with respect to the central axis of the work tube portion.
A rotary cutter 4 is provided on the front surface of the work cylinder portion 2 and the housing forming portion 3.
Since the work cylinder part 2 is a cylinder, the disk-shaped rotary cutter 4 can be used.
Since the housing forming portion 3 is rectangular, good excavation can be performed by using a known copy cutter 4 of a type in which the blade enters and exits in the radial direction from the disk-shaped rotating shaft.
Further, in the cutters 4 provided in large numbers in the casing forming portion 3, if the adjacent cutters 4 are arranged so as to be shifted forward and backward, a good excavation of the entire surface can be performed.
In the work cylinder portion 2, arc-shaped segments are assembled into a cylindrical shape to form a work well 5.
The arc-shaped segment is carried from outside the mine by a carriage through a work cylinder.
The excavated earth and sand are also discharged out of the mine through the muddy mud supply and discharge channel installed in the work mine 5.
Assembling the segments of the work cylinder portion 2 is performed by an erector that grips the segments and expands and contracts similarly to the conventional shield machine.
The segments assembled in a cylindrical shape form the working pit 5 at the intersection of the underground structures.
In the housing forming part 3, it is not necessary to assemble the segments, and the housing block 6 is formed by connecting simple rectangular single blocks.
That is, a continuous body of rectangular single blocks becomes a housing block 6, and this housing block 6 forms a part of the housing of the underground structure.
The shield machine 1 takes the reaction force against the work mine 5 and the housing block 6 and the outer body advances while extending the jack.
The end surface of the housing block 6 is called a free end 63.
The internal space of the work cylinder part 2 and the case forming part 3 communicates so that a single block of the case can be pushed out to the case forming part 3 by a jack installed in the work cylinder part 2 in the transverse direction. It is configured.
Hereinafter, for convenience of explanation, the shield machine of this embodiment shown in FIG. 1 is referred to as a “keyhole type”.

＜２＞Ｌ字型シールド掘進機。（図２）
地下構造物の躯体の一部を構築するシールド掘進機１である。
このシールド掘進機１も、前記した鍵穴型のシールド掘進機１と同様に鋼製の外郭体であり、円筒状の作業筒部２と、その作業筒部２の中心軸に対して放射方向に延長した矩形箱状の躯体形成部３とによって構成する。
ただし躯体形成部３は、作業筒部２から水平方向と鉛直方向の二方向へ向けてＬ字状に設ける。
すなわち円筒状の作業筒部２から水平方向に向けて設けた、矩形箱状の水平躯体形成部３１と、作業筒部２から鉛直方向に向けて設けた、矩形箱状の鉛直躯体形成部３２とから構成する。
前面に配置したカッター４、作業筒部２の内部でのセグメントの組み立て、各躯体形成部３へのブロックの押し出し、その他の構成は前記の鍵穴型と同様の構成である。
作業筒部２の内部で形成した作業坑５に対して、水平方向には水平躯体ブロック６１が、鉛直方向には鉛直躯体ブロック６２が形成される。
水平、鉛直躯体ブロック６１、６２の、作業坑５と反対側の端面を、自由端部６３とよぶ。
なお、本明細書において「水平」躯体、「鉛直」躯体とは精密に９０度の角度差を設けるという意味ではなく、異なった二方向を意味するものである。
したがって、矩形以外の多角形の地下構造物を構築する場合など、９０度以外の角度差を設ける場合もあり、その構成もこの用語に含まれるものである。
以下、説明の便宜上で図２，４に示す実施例のシールド機を「Ｌ字型」と称する。 <2> L-shaped shield machine. (Figure 2)
It is the shield machine 1 which constructs a part of the frame of an underground structure.
This shield machine 1 is also a steel outer body similar to the above-described keyhole type shield machine 1, and has a cylindrical work tube portion 2 and a radial direction with respect to the central axis of the work tube portion 2. It is comprised by the extended rectangular box-shaped housing formation part 3. FIG.
However, the housing forming part 3 is provided in an L shape from the work cylinder part 2 in two directions, the horizontal direction and the vertical direction.
That is, a rectangular box-shaped horizontal housing forming portion 31 provided in the horizontal direction from the cylindrical work tube portion 2 and a rectangular box-shaped vertical housing forming portion 32 provided in the vertical direction from the work tube portion 2. And consists of
The cutter 4 disposed on the front surface, the assembly of the segments inside the work cylinder portion 2, the extrusion of the blocks to the respective housing forming portions 3, and other configurations are the same as those of the keyhole type.
A horizontal housing block 61 is formed in the horizontal direction and a vertical housing block 62 is formed in the vertical direction with respect to the working pit 5 formed inside the working cylinder portion 2.
The end surfaces of the horizontal and vertical housing blocks 61 and 62 on the side opposite to the work pit 5 are referred to as free end portions 63.
In this specification, “horizontal” housing and “vertical” housing do not mean a precise angle difference of 90 degrees, but mean two different directions.
Therefore, an angle difference other than 90 degrees may be provided, such as when constructing a polygonal underground structure other than a rectangle, and the configuration is also included in this term.
Hereinafter, for convenience of explanation, the shield machine of the embodiment shown in FIGS. 2 and 4 is referred to as “L-shaped”.

＜３＞曲面躯体。（図３，４）
以上で説明した鍵穴型、Ｌ字型ともに、シールド掘進機１の躯体形成部３は矩形の箱状体であった。
しかし図３，４に示すように、躯体形成部３を円弧状に形成することもできる。
その場合には躯体形成部３で組み立てるブロックはアーチ状であり、ブロックを接続した躯体ブロック６はアーチ状の躯体となる。
躯体形成部３が円弧状である他は、前記の実施例の構成と同様である。
<3> Curved body. (Figs. 3 and 4)
In both the keyhole shape and the L shape described above, the frame forming portion 3 of the shield machine 1 was a rectangular box-shaped body.
However, as shown in FIGS. 3 and 4, the housing forming part 3 can be formed in an arc shape.
In that case, the block assembled by the housing forming part 3 is arched, and the housing block 6 to which the blocks are connected becomes an arched housing.
The structure is the same as that of the above-described embodiment except that the housing forming part 3 is arcuate.

次に上記のシールド掘進機１を使用して行う地下構造物の構築方法を説明する。 Next, the construction method of an underground structure performed using said shield machine 1 is demonstrated.

＜１＞鍵穴型シールド掘進機１を使用した構築方法。（図５）
上記の「鍵穴型」シールド掘進機１を使用する。
このシールド掘進機１の躯体形成部３をほぼ水平方向に配置して掘削してブロックを設置することによって、第一の躯体ブロック６Ａを構築する。
次に第一の躯体ブロック６Ａを構築した上記のシールド掘進機１と、鉛直軸対称型のシールド掘進機１を使用し、そのシールド掘進機１の躯体形成部３をほぼ水平方向に配置して掘削することによって第二の躯体ブロック６Ｂを構築する。
その際に、第一の躯体ブロック６Ａの自由端部６３と、第二の躯体ブロック６Ｂの自由端部６３とを接近させて配置する。
そして、躯体ブロックの自由端部６３の間隔は、掘削して後述する各種の方法によって連結する。
こうして地中に、地下構造物の躯体の天井部を形成する。
鍵穴型のシールド掘進機１を使用し、同様の工程によって、天井部を形成する第一、第二の躯体ブロック６Ａ、６Ｂと一定距離はなれた位置に、第三、第四の躯体ブロック６Ｃ、６Ｄを構築する。
これが、地下構造物の本体の床部となる。
天井部と床部の作業坑５の間は、地中を鉛直に掘削して壁面部を形成する。
この壁面は、地盤改良した地中に天井側の作業坑５から加圧装置によってパイプ群を床側の作業坑５に向けて圧入して形成するなど、公知の方法を採用することができる。
作業坑５は、その役目が終了したら内部にコンクリートを充填して地下構造物の隅部を構成させる。
こうして、地中に躯体ブロックによる天井部、床部、両者を連結する壁部が完成し、その結果、地中には大断面を有する矩形の地下構造物が完成する。
<1> A construction method using the keyhole shield machine 1. (Fig. 5)
The above “keyhole type” shield machine 1 is used.
The first frame block 6A is constructed by arranging the blocks by excavating the frame forming portion 3 of the shield machine 1 in a substantially horizontal direction.
Next, using the shield machine 1 having the first chassis block 6A and the vertical axis symmetric shield machine 1, the chassis formation part 3 of the shield machine 1 is arranged in a substantially horizontal direction. The second housing block 6B is constructed by excavating.
At that time, the free end 63 of the first housing block 6A and the free end 63 of the second housing block 6B are arranged close to each other.
And the space | interval of the free end part 63 of a housing block is excavated and it connects by the various methods mentioned later.
In this way, the ceiling of the underground structure is formed in the ground.
Using the keyhole-type shield machine 1, the third and fourth casing blocks 6C, 6C, 6C, 6C, 6B, 6B, 6B, Build 6D.
This is the floor of the main body of the underground structure.
Between the ceiling and floor working pits 5, the underground is excavated vertically to form wall surfaces.
For this wall surface, a known method can be employed such as forming a pipe group from the ceiling-side working pit 5 into the floor-side working pit 5 with a pressurizing device in the ground improved.
The work pit 5 is filled with concrete when the role is completed, and constitutes the corner of the underground structure.
In this way, the ceiling part, the floor part, and the wall part connecting the two parts are completed in the ground, and as a result, a rectangular underground structure having a large cross section is completed in the ground.

＜２＞Ｌ字型シールド掘進機１を使用した構築方法。（図６）
上記の「Ｌ字型」シールド掘進機１を使用する。
このシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによってＬ字状の第一の躯体ブロック６Ａを構築する。
次に上記のシールド掘進機１と、鉛直軸対称型のシールド掘進機１を使用し、そのシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第二の躯体ブロック６Ｂを構築する。
以上の工程を、水平軸を対象状態で施工して、第三、第四の躯体ブロック６Ｃ、６Ｄを構築する。
その際に、各躯体ブロックの自由端部６３を接近させて配置する。
そして各躯体ブロックの自由端部６３の間隔は、掘削して後述する各種の方法によって連結する。
その結果、地下構造物が完成する。
<2> A construction method using the L-shaped shield machine 1. (Fig. 6)
The above “L-shaped” shield machine 1 is used.
The L-shaped first housing block 6A is constructed by arranging the horizontal housing forming portion 31 of the shield machine 1 in a substantially horizontal direction and excavating the vertical housing forming portion 32 in a substantially vertical direction.
Next, the shield machine 1 described above and the vertical axis symmetric shield machine 1 are used, the horizontal body forming part 31 of the shield machine 1 is arranged in a substantially horizontal direction, and the vertical body forming part 32 is made substantially vertical. The second housing block 6B is constructed by excavating in the direction.
The above steps are performed with the horizontal axis in the target state, and the third and fourth housing blocks 6C and 6D are constructed.
At that time, the free ends 63 of the respective housing blocks are arranged close to each other.
And the space | interval of the free end part 63 of each housing block is excavated and it connects by the various methods mentioned later.
As a result, the underground structure is completed.

＜３＞鍵穴型シールド掘進機１を使用した構築方法。（図７）
上記した「鍵穴型」シールド掘進機１を使用する。
このシールド掘進機１の躯体形成部３をほぼ水平に配置して掘進することによって作業坑５と第一の躯体ブロック６Ａを構築する。
その際に、第一の躯体ブロック６Ａの作業坑５のセグメントの一部には、通常のセグメントの強度より強度の小さい軟切削セグメント５１を使用する。
第一の躯体ブロック６Ａを形成した上記のシールド掘進機１と、鉛直軸、あるいは水平軸と対象型のシールド掘進機１、あるいは直交する方向に配置したシールド掘進機１を使用して、第二の躯体ブロック６Ｂを構築する。
第二の躯体ブロック６Ｂの掘進に際しては、先行した第一の躯体ブロック６Ａの作業坑５の軟切削セグメント５１を切削して行う。
すなわち、第二の躯体ブロック６Ｂを掘削する際には、シールド掘進機１の水平躯体形成部の自由端部側の一部が、第一の躯体ブロック６Ａの作業坑５に食い込む状況で掘進を行う。
同様の掘進を繰り返して地下構造物の躯体を形成して地下構造物が完成する。
<3> A construction method using the keyhole shield machine 1. (Fig. 7)
The “keyhole type” shield machine 1 described above is used.
The working pit 5 and the first skeleton block 6A are constructed by digging with the skeleton body forming portion 3 of the shield machine 1 arranged almost horizontally.
At that time, a soft cutting segment 51 having a strength lower than that of a normal segment is used as a part of the segment of the working shaft 5 of the first casing block 6A.
Using the shield machine 1 having the first housing block 6A and the shield machine 1 of the vertical axis or the horizontal axis and the target type shield machine 1 or arranged in the orthogonal direction, the second The housing block 6B is constructed.
When the second housing block 6B is dug, the soft cutting segment 51 of the work well 5 of the preceding first housing block 6A is cut.
That is, when excavating the second housing block 6B, the excavation is performed in a state where a part of the free housing portion side of the horizontal housing forming portion of the shield machine 1 bites into the work well 5 of the first housing block 6A. Do.
The underground structure is completed by repeating similar excavations to form a structure of the underground structure.

＜４＞Ｌ字型シールド掘進機１を使用した構築方法。（図８）
上記した「Ｌ字型」シールド掘進機１を使用する。
このシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第一の躯体ブロック６Ａを構築する。
次に、上記の第一の躯体ブロック６Ａを構築したシールド掘進機１と、点対称型のシールド掘進機１を使用して、そのシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第二の躯体ブロック６Ｂを構築する。
その際に、ひとつの躯体ブロックの自由端部６３を、他の躯体ブロックの自由端６３に接近させて配置する。
各躯体ブロックの自由端部６３の間隔は、後述する方法などによって連結する。
その結果、地下構造物が完成する。
<4> A construction method using the L-shaped shield machine 1. (Fig. 8)
The “L-shaped” shield machine 1 described above is used.
The first casing block 6A is constructed by excavating the horizontal casing forming section 31 of the shield machine 1 arranged in a substantially horizontal direction and the vertical casing forming section 32 arranged in a substantially vertical direction.
Next, using the shield machine 1 constructed with the above first chassis block 6A and the point symmetric shield machine 1, the horizontal chassis forming portion 31 of the shield machine 1 is arranged in a substantially horizontal direction. Then, the second casing block 6B is constructed by excavating the vertical casing forming portion 32 arranged in a substantially vertical direction.
At that time, the free end portion 63 of one housing block is placed close to the free end 63 of another housing block.
The space | interval of the free end part 63 of each housing block is connected by the method etc. which are mentioned later.
As a result, the underground structure is completed.

＜５＞Ｌ字型シールド掘進機１を使用した他の構築方法。（図９）
上記した「Ｌ字型」シールド掘進機１を使用するが、この実施例では２台のシールド掘進機１を使用せず、１台のシールド掘進機１によって第一と第二の躯体ブロックを完成する。
まずシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して発進立坑から到達立坑へ向けて掘削することによって第一の躯体ブロック６Ａを構築する。
次に、他の掘進機ではなく同一のシールド掘進機１を使用して、鉛直線位置の第二の躯体ブロック６Ｂを構築する。
そのために、到達立坑に到達したシールド掘進機１を、その前後を反転させる。
そして、到達立坑側から、第一の躯体ブロックに対して鉛直線対象位置に当該シールド掘進機を配置し、発進立坑側へ向けて掘進を行う。
その際に、反転させたシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第二の躯体ブロック６Ｂを構築する。
以上の工程を、第一、第二の躯体ブロックに対して水平軸対象状態で施工して、第三、第四の躯体ブロック６Ｄを構築する。
その際に、ひとつの躯体ブロックの自由端部６３を、他の躯体ブロックの自由端６３に接近させて配置する。
各躯体ブロックの自由端部６３の間隔は、後述する方法などによって連結する。
その結果、地下構造物が完成する。
<5> Another construction method using the L-shaped shield machine 1. (Fig. 9)
The above-described “L-shaped” shield machine 1 is used, but in this embodiment, the first and second housing blocks are completed by one shield machine 1 without using two shield machines 1. To do.
First, the horizontal frame forming part 31 of the shield machine 1 is arranged in a substantially horizontal direction, and the vertical frame forming part 32 is arranged in a substantially vertical direction and excavated from the starting vertical shaft to the final vertical shaft 6A. Build up.
Next, the second shield block 6B at the vertical line position is constructed using the same shield machine 1 instead of another machine.
Therefore, the shield machine 1 that has reached the reaching shaft is reversed before and after.
And the said shield excavator is arrange | positioned in the perpendicular | vertical line object position with respect to the 1st frame block from the arrival shaft side, and it excavates toward the start shaft side.
At that time, the second housing block 6B is constructed by excavating the horizontal housing forming portion 31 of the inverted shield machine 1 arranged in a substantially horizontal direction and the vertical housing forming portion 32 arranged in a substantially vertical direction. To do.
The above steps are applied to the first and second housing blocks in the horizontal axis target state to construct the third and fourth housing blocks 6D.
At that time, the free end portion 63 of one housing block is placed close to the free end 63 of another housing block.
The space | interval of the free end part 63 of each housing block is connected by the method etc. which are mentioned later.
As a result, the underground structure is completed.

＜６＞鍵穴型とＬ字型の組み合わせ。（図１０）
上記した「鍵穴型」シールド掘進機１を使用する。
このシールド掘進機１の躯体形成部３をほぼ水平方向に配置して掘削することによって第一の躯体ブロック６Ａを構築する。
第一の躯体ブロック６Ａを構築したシールド掘進機１と、鉛直軸対称型のシールド掘進機１を使用し、そのシールド掘進機１の躯体形成部３をほぼ水平方向に配置して掘削することによって第二の躯体ブロック６Ｂを構築する。
次に上記した「Ｌ字型」シールド掘進機１を使用する。
このシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第三の躯体ブロック６Ｃを構築する。
さらに第三の躯体ブロック６Ｃを構築したシールド掘進機１と、鉛直軸対称型のシールド掘進機１を使用し、そのシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第四の躯体ブロック６Ｄを構築する。
その際に、第三、第四の躯体ブロック６Ｃ、６Ｄの自由端６３は、第一、第二の躯体ブロック６Ａ、６Ｂの作業坑５に接近させて配置する。
そして各自由端６３の間隔を後述する方法によって連結する。
こうして地中に地下構造物を構築する。
<6> A combination of a keyhole shape and an L shape. (Fig. 10)
The “keyhole type” shield machine 1 described above is used.
The first casing block 6A is constructed by excavating the casing forming portion 3 of the shield machine 1 in a substantially horizontal direction.
By using the shield machine 1 in which the first chassis block 6A is constructed and the vertical axis symmetrical shield machine 1, the chassis forming part 3 of the shield machine 1 is arranged in a substantially horizontal direction and excavated. A second housing block 6B is constructed.
Next, the “L-shaped” shield machine 1 described above is used.
The third housing block 6C is constructed by arranging the horizontal housing forming portion 31 of the shield machine 1 in a substantially horizontal direction and excavating the vertical housing forming portion 32 in a substantially vertical direction.
Furthermore, the shield machine 1 which has constructed the third chassis block 6C and the vertical axis symmetric shield machine 1 are used, and the horizontal chassis forming part 31 of the shield machine 1 is arranged in a substantially horizontal direction, and the vertical chassis The fourth housing block 6D is constructed by excavating the forming portion 32 in a substantially vertical direction.
At that time, the free ends 63 of the third and fourth casing blocks 6C and 6D are arranged close to the working pit 5 of the first and second casing blocks 6A and 6B.
And the space | interval of each free end 63 is connected by the method mentioned later.
In this way, underground structures are built in the ground.

＜７＞鍵穴型とＬ字型の組み合わせ。（図１１）
上記した鍵穴型シールド掘進機１を使用する。
このシールド掘進機１の躯体形成部３をほぼ水平方向に配置して掘削することによって第一の躯体ブロック６Ａを構築する。
第一の躯体ブロック６Ａを掘進した上記のシールド掘進機１と、鉛直軸対称型のシールド掘進機１を使用し、そのシールド掘進機１の躯体形成部３をほぼ水平方向に配置して掘削することによって第二の躯体ブロック６Ｂを構築する。
その際に、第一と第二の躯体ブロック６Ｂの自由端６３は接近させて配置する。
さらに、第一、第二の躯体ブロック６Ｂの作業坑５のセグメントの一部には、シールド掘進機１のカッター４で掘削が容易な、軟切削セグメント５１を使用する。
次に上記した「Ｌ字型」シールド掘進機１を使用する。
このシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第三の躯体ブロック６Ｃを構築する。
この第三の躯体ブロック６Ｃの掘進に際しては、先行した第一の躯体ブロック６Ａの作業坑５の軟切削セグメント５１をカッター４で切削して行い、自由端側の一部を第一の躯体ブロック６Ａの作業坑５の内部に位置させる。
さらに第三の躯体ブロック６Ｃを掘進した上記のシールド掘進機１と、鉛直軸対称型のシールド掘進機１を使用し、そのシールド掘進機１の水平躯体形成部３１をほぼ水平方向に配置し、鉛直躯体形成部３２をほぼ鉛直方向に配置して掘削することによって第四の躯体ブロック６Ｄ６Ｄを構築する。
第四の躯体ブロック６Ｄの掘進に際しては、先行した第二の躯体ブロック６Ｂの作業坑５の軟切削セグメント５１を切削して行う。
その際に第三、第四の躯体ブロック６Ｃ、６Ｄの自由端６３は、接近させて配置し、自由端部６３の間隔は後述する方法によって連結する。
こうして地下構造物が完成する。
<7> A combination of a keyhole shape and an L shape. (Fig. 11)
The keyhole shield machine 1 described above is used.
The first casing block 6A is constructed by excavating the casing forming portion 3 of the shield machine 1 in a substantially horizontal direction.
Using the above-described shield machine 1 excavating the first chassis block 6A and the vertical axis symmetric shield machine 1, the chassis formation portion 3 of the shield machine 1 is arranged in a substantially horizontal direction for excavation. Thus, the second housing block 6B is constructed.
At that time, the free ends 63 of the first and second housing blocks 6B are arranged close to each other.
Furthermore, a soft cutting segment 51 that can be easily excavated by the cutter 4 of the shield machine 1 is used as a part of the segment of the work well 5 of the first and second housing blocks 6B.
Next, the “L-shaped” shield machine 1 described above is used.
The third housing block 6C is constructed by arranging the horizontal housing forming portion 31 of the shield machine 1 in a substantially horizontal direction and excavating the vertical housing forming portion 32 in a substantially vertical direction.
When the third housing block 6C is dug, the soft cutting segment 51 of the working shaft 5 of the preceding first housing block 6A is cut by the cutter 4, and a part of the free end side is formed in the first housing block 6C. It is located inside the working mine 5 of 6A.
Further, using the shield machine 1 that has excavated the third chassis block 6C and the shield machine 1 of the vertical axis symmetry type, the horizontal chassis forming part 31 of the shield machine 1 is arranged in a substantially horizontal direction, The fourth casing block 6D6D is constructed by excavating the vertical casing forming portion 32 arranged in a substantially vertical direction.
When the fourth casing block 6D is dug, the soft cutting segment 51 of the work well 5 of the preceding second casing block 6B is cut.
At that time, the free ends 63 of the third and fourth housing blocks 6C and 6D are arranged close to each other, and the interval between the free ends 63 is connected by a method described later.
Thus, the underground structure is completed.

＜８＞継ぎ手の構成。
上記した各工法において、躯体ブロックの自由端６３の間に発生した間隙を連結する方法を具体的に説明する。
ただし、上記した方法で地下構造物を構築するに際して、自由端の連結は以下の連結方法に限定されるものではなく、それ以外にも他の公知の方法によって連結することも可能である。 <8> Configuration of the joint.
In each of the above-described construction methods, a method for connecting the gap generated between the free ends 63 of the housing block will be specifically described.
However, when the underground structure is constructed by the above-described method, the connection of the free ends is not limited to the following connection method, but can be connected by other known methods.

＜９＞ピン構造。（図１２）
先行する第一の躯体ブロック６Ａの自由端６３に軟切削部６３ａを形成しておく。
後行する第二の躯体ブロック６Ｂを掘進するシールド掘進機１では、その躯体形成部３の自由端を円弧状に突設して形成しておく。
すると、後行シールド掘進機１の掘進によって第一の躯体ブロック６Ａの軟切削部６３ａは円弧状に削り取られる。
後行シールド掘進機１が前進した跡には後行する第二の躯体ブロック６Ｂが形成されるが、この躯体ブロックの自由端も円弧状に突設した形状に形成しておく。
先行する第一の躯体ブロック６Ａの自由端６３と、後行する第二の躯体ブロック６Ｂの自由端６３の間には間隙が残るから、両者の間に強度を有する充填材６３ｂを充填して両者を一体化する。
<9> Pin structure. (Fig. 12)
A soft cutting portion 63a is formed at the free end 63 of the preceding first housing block 6A.
In the shield machine 1 that excavates the second housing block 6B that follows, the free end of the housing forming portion 3 is formed to project in an arc shape.
Then, the soft cutting portion 63a of the first casing block 6A is cut into an arc shape by the excavation by the trailing shield machine 1.
The trailing second shield block 6B is formed at the trace of the trailing shield machine 1 moving forward, and the free end of this shield block is also formed in a shape protruding in an arc shape.
Since a gap remains between the free end 63 of the preceding first housing block 6A and the free end 63 of the following second housing block 6B, a filler 63b having strength is filled between them. Integrate both.

＜１０＞プレキャスト部材の挿入。（図１３）
先行する第一の躯体ブロック６Ａと、後行する第二の躯体ブロック６Ｂとの間に間隙が生じているが、この間隙の外側の地山に薬液注入を行い地盤改良範囲７１を形成する。
その後に、間隙部分を構造物の内側から掘削する。
そして掘削した間隙に、コンクリートブロックのようなプレキャスト部材７を挿入する。
プレキャスト部材７と、躯体間にまだ隙間が存在する場合にはさらに調整部材を充填する。
<10> Insert a precast member. (Fig. 13)
A gap is formed between the preceding first housing block 6A and the following second housing block 6B. The ground solution improvement region 71 is formed by injecting a chemical into the ground outside the gap.
Thereafter, the gap portion is excavated from the inside of the structure.
Then, a precast member 7 such as a concrete block is inserted into the excavated gap.
If there is still a gap between the precast member 7 and the housing, the adjustment member is further filled.

＜１１＞一体くさびの挿入。（図１４）
先行する第一の躯体ブロック６Ａと、後行する第二の躯体ブロック６Ｂともに、その自由面６３に、構造物の外へ向けて広がる傾斜面６３ｃを形成しておく。
両側の傾斜面６３ｃの間には間隙があるから、この間隙の外側の地山に薬液注入を行い地盤改良範囲７１を形成する。
その後に間隙部分を構造物の内側から掘削する。
そして掘削した間隙に、プレキャスト部材７ａを挿入するが、このプレキャスト部材７ａは、外側の辺がひろい台形状を呈するもの、すなわち「くさび」を使用する。
台形状のプレキャスト部材７ａが、傾斜面に食い込み、連結できる。
ただし台形状のプレキャスト部材７ａは、外側の辺が広いからそのままでは間隙に挿入できない。そこで地盤改良範囲７１の一部を掘削していったん縦方向に挿入し、その後回転させて広い辺を外側に向けて挿入する。
台形状のプレキャスト部材７ａと、躯体との隙間があれば調整部材を充填する。
<11> Insert an integral wedge. (Fig. 14)
In both the preceding first housing block 6A and the following second housing block 6B, an inclined surface 63c extending outward from the structure is formed on the free surface 63 thereof.
Since there is a gap between the inclined surfaces 63c on both sides, the ground solution improvement range 71 is formed by injecting a chemical solution into the natural ground outside the gap.
Thereafter, the gap is excavated from the inside of the structure.
The precast member 7a is inserted into the excavated gap. The precast member 7a uses a trapezoidal shape whose outer side is wide, that is, a “wedge”.
The trapezoidal precast member 7a can bite into and connect to the inclined surface.
However, the trapezoidal precast member 7a cannot be inserted into the gap as it is because the outer side is wide. Therefore, a part of the ground improvement range 71 is excavated and once inserted in the vertical direction, and then rotated and inserted with the wide side facing outward.
If there is a gap between the trapezoidal precast member 7a and the housing, the adjustment member is filled.

＜１２＞分割くさび。（図１５）
上記の台形状のプレキャスト部材７ａ先行する第一の躯体ブロック６Ａと後行する第二の躯体ブロック６Ｂ間に挿入する点は、上記の実施例と同じである。
ただし、台形状のプレキャスト部材７ａを分割した分割プレキャスト部材７ｂを使用する。
これは、複数個を組み合わせると外側の辺がひろい台形状、すなわち「くさび」を形成する。
すると、分割プレキャスト部材７ｂを回転させることなく、両者を組み合わせて台形状のくさびを形成することができる。
この組み合わせ後のくさびが傾斜面に食い込み、両躯体の間を連結することができる。
分割プレキャスト部材７ｂと、躯体６Ａ、６Ｂの自由端６３との間に隙間があれば調整部材を充填する
<12> Split wedge. (Fig. 15)
The point that the trapezoidal precast member 7a is inserted between the preceding first housing block 6A and the following second housing block 6B is the same as the above embodiment.
However, a divided precast member 7b obtained by dividing the trapezoidal precast member 7a is used.
When a plurality of them are combined, a trapezoidal shape whose outer side is wide, that is, a “wedge” is formed.
Then, a trapezoidal wedge can be formed by combining both without rotating the divided precast member 7b.
The wedge after this combination can bite into the inclined surface and connect the two casings.
If there is a gap between the divided precast member 7b and the free ends 63 of the housings 6A and 6B, the adjustment member is filled.

＜１３＞場所打ち構造。（図１６）
先行する第一の躯体ブロック６Ａと、後行する第二の躯体ブロック６Ｂともに、その自由面６３を構造物の外へ向けて広がる傾斜面６３ｃとして形成する。
傾斜面６３ｃの間には間隙があるので、この間隙の周囲の外側の地山に薬液を注入して地盤改良範囲７１を形成する。
そして、間隙部分を構造物の内側から掘削する。
掘削した間隙に、鉄筋７ｃを配置する。
その場合に鉄筋７ｃの配筋が簡単に行えるように、各躯体の傾斜面６３ｃには鉄筋７を挿入することができる市販の器具などを埋め込んでおく。
鉄筋７ｃを配筋後の間隙を内側から型枠でふさぎ、その内部にコンクリート７ｄを打設する。
<13> A cast-in-place structure. (Fig. 16)
Both the preceding first housing block 6A and the following second housing block 6B are formed with their free surfaces 63 as inclined surfaces 63c extending outward from the structure.
Since there is a gap between the inclined surfaces 63 c, the ground improvement range 71 is formed by injecting a chemical into the outer ground around the gap.
Then, the gap portion is excavated from the inside of the structure.
A reinforcing bar 7c is placed in the excavated gap.
In this case, a commercially available instrument or the like that can insert the reinforcing bar 7 is embedded in the inclined surface 63c of each housing so that the reinforcing bar 7c can be easily arranged.
The gap after reinforcing bar 7c is closed with a mold from the inside, and concrete 7d is placed inside.

＜１４＞後行躯体の押し出し。（図１７）
各躯体ブロック６Ａ、６Ｂは、作業筒部２の内部から横断方向のジャッキを用いて単体のブロックを押し出して形成してある。
そこで、先行する第一の躯体ブロック６Ａの端面に向けて、後行する第二の躯体ブロック６Ｂからブロック単体を押し出して、先行する第一の躯体ブロック６Ａの自由端６３と当接させる。
ブロック単体の押し出しが容易であるように、その外周には滑剤を充填しておくこともできる。
こうして第一、第二の躯体ブロック６Ａ、６Ｂを連結する。
場合によっては両方の躯体にＰＣ鋼材を挿入するシース管を配置しておき、両躯体を当接後にＰＣ鋼材を挿入して緊張して定着して確実な一体化をはかる。
<14> Extruding the trailing housing. (Fig. 17)
Each housing block 6A, 6B is formed by extruding a single block from the inside of the work cylinder portion 2 using a jack in the transverse direction.
Therefore, the single block is pushed out from the second housing block 6B that follows the first housing block 6A toward the end surface of the preceding first housing block 6A, and is brought into contact with the free end 63 of the preceding first housing block 6A.
The outer periphery of the block can be filled with a lubricant so that the block can be easily extruded.
Thus, the first and second housing blocks 6A and 6B are connected.
In some cases, a sheath tube for inserting the PC steel material is arranged in both the housings, and after contacting the both housings, the PC steel material is inserted, and is tensioned and fixed to achieve a reliable integration.

本発明のシールド掘進機１の実施例の説明図。Explanatory drawing of the Example of the shield machine 1 of this invention. 躯体形成部３を二方向に設けたシールド掘進機１の説明図。Explanatory drawing of the shield machine 1 which provided the frame formation part 3 in two directions. 躯体形成部３を曲線状に形成したシールド掘進機１の説明図。Explanatory drawing of the shield machine 1 which formed the frame formation part 3 in the shape of a curve. 躯体形成部３を曲線状に形成したシールド掘進機１の説明図。Explanatory drawing of the shield machine 1 which formed the frame formation part 3 in the shape of a curve. 大断面の地下構造物の構築状態の説明図。Explanatory drawing of the construction state of an underground structure of a large section. 大断面の地下構造物の構築状態の他の実施例の説明図。Explanatory drawing of the other Example of the construction state of the underground structure of a large cross section. 大断面の地下構造物の構築状態の他の実施例の説明図。Explanatory drawing of the other Example of the construction state of the underground structure of a large cross section. 大断面の地下構造物の構築状態の他の実施例の説明図。Explanatory drawing of the other Example of the construction state of the underground structure of a large cross section. 大断面の地下構造物の構築状態の他の実施例の説明図。Explanatory drawing of the other Example of the construction state of the underground structure of a large cross section. 大断面の地下構造物の構築状態の他の実施例の説明図。Explanatory drawing of the other Example of the construction state of the underground structure of a large cross section. 大断面の地下構造物の構築状態の他の実施例の説明図。Explanatory drawing of the other Example of the construction state of the underground structure of a large cross section. 躯体間の連結方法の説明図。Explanatory drawing of the connection method between housings. 躯体間の連結方法の他の実施例の説明図。Explanatory drawing of the other Example of the connection method between housings. 躯体間の連結方法の他の実施例の説明図。Explanatory drawing of the other Example of the connection method between housings. 躯体間の連結方法の他の実施例の説明図。Explanatory drawing of the other Example of the connection method between housings. 躯体間の連結方法の他の実施例の説明図。Explanatory drawing of the other Example of the connection method between housings. 躯体間の連結方法の他の実施例の説明図。Explanatory drawing of the other Example of the connection method between housings.

Explanation of symbols

１：シールド掘進機
２：作業筒部
３：躯体形成部
３１：水平躯体形成部
３２：鉛直躯体形成部
４：カッター
５：作業坑
５１：軟切削セグメント
６：躯体ブロック
６１：水平躯体ブロック
６２：鉛直躯体ブロック
６Ａ：第一の躯体ブロック
６Ｂ：第二の躯体ブロック
1: Shield machine 2: Work cylinder unit 3: Housing forming unit 31: Horizontal housing forming unit 32: Vertical housing forming unit 4: Cutter 5: Working shaft 51: Soft cutting segment 6: Housing block 61: Horizontal housing block 62: Vertical housing block 6A: First housing block 6B: Second housing block

Claims

A shield machine that builds a part of the structure of an underground structure,
While assembling the segments, the work cylinder part that forms the work mine,
It is constituted by a housing forming part arranged in a direction radiating with respect to the central axis of the work cylinder part,
Install a cutter for digging in front of the work tube and the body forming part,
The internal space between the work cylinder part and the housing forming part is configured to communicate with each other,
From the work cylinder part to the chassis forming part, it was configured to extrude the block alone and form the chassis block of the underground structure,
Shield machine.

A shield machine that builds a part of the structure of an underground structure,
While assembling the segments, the work cylinder part that forms the work mine,
It is constituted by a housing forming part arranged in a direction radiating with respect to the central axis of the work cylinder part,
The housing forming part is attached from the work cylinder part toward the horizontal direction and the vertical direction,
Install a cutter for digging in front of the work tube and the body forming part,
The internal space between the work cylinder part and the housing forming part is configured to communicate with each other,
From the work cylinder part to the chassis forming part, it was configured to extrude the block alone and form the chassis block of the underground structure,
Shield machine.

Use the shield machine according to claim 1,
By constructing the first housing block by excavating the housing forming part of this shield machine in a substantially horizontal direction, using the above shield machine and the vertical axisymmetric shield machine,
The second housing block is constructed by arranging and digging the housing forming portion of the shield machine almost horizontally, and the free end portion of the first housing block and the free end portion of the second housing block. Placed close together,
The space between the free ends of the frame block is excavated and connected to form the ceiling of the frame of the underground structure,
By the same process, the floor of the underground structure is formed,
Between the ceiling and floor working pits, it is done by excavating vertically in the ground to form wall surfaces,
Construction method for underground structures.

Using the shield machine according to claim 2,
The horizontal housing forming part of this shield machine is arranged almost horizontally,
By constructing the first chassis block by excavating with the vertical chassis formation part arranged almost vertically,
Using the above shield machine and the vertical axis symmetrical shield machine,
The horizontal housing forming part of the shield machine is arranged almost horizontally,
By constructing the second chassis block by excavating with the vertical chassis formation part arranged almost vertically,
By constructing the above process in the target state on the horizontal axis, the third and fourth housing blocks are constructed,
Place the free ends of each chassis block close together,
The space between the free ends of each frame block is excavated and connected to form the frame of the underground structure.
Construction method for underground structures.

Using the shield machine according to claim 2,
The horizontal housing forming part of this shield machine is arranged almost horizontally,
By constructing the first chassis block by excavating with the vertical chassis formation part arranged almost vertically,
Reversing the front and back of the shield machine that reached the reach shaft,
From the reach shaft, arrange the shield machine in the vertical target position with respect to the first frame block,
The horizontal housing forming part is arranged almost horizontally,
By constructing the second chassis block by excavating with the vertical chassis formation part arranged almost vertically,
By constructing the above processes in the horizontal axis target state, the third and fourth housing blocks 6D are constructed,
Place the free ends of each chassis block close together,
The space between the free ends of each frame block is excavated and connected to form the frame of the underground structure.
Construction method for underground structures.

Using the shield machine according to claim 1, constructing the working mine and the connecting lining body of the first frame block by this shield machine,
Use a soft cutting segment as part of the work mine segment of the first housing block,
Using the above shield machine and the vertical axis or horizontal axis and the target type shield machine, construct the second housing block,
When digging the second enclosure block,
Cut the soft cutting segment of the work pit of the preceding first frame block,
Repeat the same excavation to form an underground structure enclosure,
Construction method for underground structures.

Using the shield machine according to claim 2,
The horizontal housing forming part of this shield machine is arranged almost horizontally,
By constructing the first chassis block by excavating with the vertical chassis formation part arranged almost vertically,
Using the above shield machine and the point-symmetric shield machine,
The horizontal housing forming part of the shield machine is arranged almost horizontally,
By constructing the second chassis block by excavating with the vertical chassis formation part arranged almost vertically,
Place the free ends of each chassis block close together,
The space between the free ends of each frame block is excavated and connected to form the frame of the underground structure.
Construction method for underground structures.

Use the shield machine according to claim 1,
The first frame block is constructed by excavating the frame forming portion of this shield machine in a substantially horizontal direction,
Using the above shield machine and the vertical axis symmetrical shield machine,
The second housing block is constructed by digging the housing forming part of the shield machine in a substantially horizontal direction,
Place the free ends of the first and second housing blocks close together,
Using the shield machine according to claim 2,
The horizontal housing forming part of this shield machine is arranged almost horizontally,
By constructing the third chassis block by excavating with the vertical chassis formation part arranged almost vertically,
Using the above shield machine and the vertical axis symmetrical shield machine,
The horizontal housing forming part of the shield machine is arranged almost horizontally,
By constructing the fourth frame block by excavating with the vertical frame formation part arranged almost vertically,
The free ends of the third and fourth housing blocks are
Place it close to the work pit of the first and second housing blocks,
Construction method for underground structures.

Use the shield machine according to claim 1,
The first frame block is constructed by excavating the frame forming portion of this shield machine in a substantially horizontal direction,
Using the above shield machine and the vertical axis symmetrical shield machine,
The second housing block is constructed by digging the housing forming part of the shield machine in a substantially horizontal direction,
Place the free ends of the first and second housing blocks close together,
Soft cutting segments are used for some of the work shaft segments of the first and second housing blocks,
Using the shield machine according to claim 2,
The horizontal housing forming part of this shield machine is arranged almost horizontally,
By constructing the third chassis block by excavating with the vertical chassis formation part arranged almost vertically,
When digging the third enclosure block,
Cut the soft cutting segment of the work pit of the preceding first frame block,
Using the above shield machine and the vertical axis symmetrical shield machine,
The horizontal housing forming part of the shield machine is arranged almost horizontally,
By constructing the fourth frame block by excavating with the vertical frame formation part arranged almost vertically,
When digging the 4th building block,
Cut the soft cutting segment of the work well of the second housing block that preceded,
The free ends of the third and fourth frame blocks are placed close to each other, and excavated at intervals to connect to form the frame of the underground structure.
Construction method for underground structures.

A method of connecting a preceding housing constructed using the shield machine according to claim 1 or 2 and a subsequent housing constructed thereafter,
A soft cutting part is formed at the free end of the preceding housing,
The free end of the housing forming part of the shield shield machine that follows is formed by projecting in an arc shape,
With this trailing shield machine, the soft cutting part at the free end of the preceding housing is cut into an arc shape,
Fill the gap between the trailing housing and the preceding housing constructed on the trace that the trailing shield machine has advanced, and integrate both with a filler,
A method of connecting the structures of underground structures.

A method of connecting a preceding housing constructed using the shield machine according to claim 1 or 2 and a subsequent housing constructed thereafter,
Improving the ground outside the gap between the leading and trailing bodies,
Excavating the gap from the inside of the structure,
Insert a precast member into the excavated gap,
If there is a gap between the precast member and the housing, insert the adjustment member.
A method of connecting the structures of underground structures.

A method of connecting a preceding housing constructed using the shield machine according to claim 1 or 2 and a subsequent housing constructed thereafter,
Both the leading and trailing housings form an inclined surface that spreads out of the structure on its free surface,
Improving the ground outside the gap between the inclined surfaces,
Excavating the gap from the inside of the structure,
Insert a precast with a trapezoidal shape on the outer side into the excavated gap,
A method of connecting the structures of underground structures.

A method of connecting a preceding housing constructed using the shield machine according to claim 1 or 2 and a subsequent housing constructed thereafter,
Both the leading and trailing housings form an inclined surface that spreads out of the structure on its free surface,
Improving the ground outside the gap between the inclined surfaces,
Excavating the gap from the inside of the structure,
Insert a precast member that has a shape that forms a trapezoidal shape with a wide outer side when combining multiple pieces in the excavated gap,
If there is a gap between the precast member and the housing, insert the adjustment member.
A method of connecting the structures of underground structures.

A method of connecting a preceding housing constructed using the shield machine according to claim 1 or 2 and a subsequent housing constructed thereafter,
Both the leading and trailing housings form an inclined surface that spreads out of the structure on its free surface,
Improving the ground outside the gap between the inclined surfaces,
Excavating the gap from the inside of the structure,
Place rebars in the excavated gap,
Placing concrete in the gap after bar arrangement,
A method of connecting the structures of underground structures.

A method of connecting a preceding housing constructed using the shield machine according to claim 1 or 2 and a subsequent housing constructed thereafter,
Towards the gap between the leading and trailing enclosures,
Extrude the block that forms the trailing frame from the work cylinder of the trailing shield machine, and abut the free end of the preceding frame,
A method of connecting the structures of underground structures.