JP2007146379A - Segment connection device and segment - Google Patents

Segment connection device and segment Download PDF

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JP2007146379A
JP2007146379A JP2005338737A JP2005338737A JP2007146379A JP 2007146379 A JP2007146379 A JP 2007146379A JP 2005338737 A JP2005338737 A JP 2005338737A JP 2005338737 A JP2005338737 A JP 2005338737A JP 2007146379 A JP2007146379 A JP 2007146379A
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segment
joint
male
joint surface
head
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JP4619276B2 (en
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Noriyasu Yamamori
規安 山森
Noboru Tsuyuki
昇 露木
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Kumagai Gumi Co Ltd
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Kumagai Gumi Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of conventional segment connection devices wherein so-called openings and dislocation occur in a connected portion between the joint faces of segments, and underground water or slurry flows into the wall body of a shield tunnel. <P>SOLUTION: This segment connection device is composed of a male joint 20 fitted to one segment joint face 8 of one segment 2A and a female joint 30 fitted to the other segment joint face 9 of the other segment 2B. The male joint 20 comprises a female screw hole 21 and a headed bolt 22. The female joint 30 comprises a male screw part insertion groove 31 and a head part storage part 32. The head part storage part 32 comprises a space 37 formed in such a size that a tool inserted from the outside of the other ring joint surface 11 of the other segment 2B into the head part storage part 32 can be operated so that the head part 25 of the bottomed bolt 22 can be pressingly engaged with the male screw part insertion groove 31 by advancing the bottomed bolt 22 stored in the head part storage part 32 in the inner direction of one segment. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、セグメントのセグメント継手面同士の連結部分でのいわゆる目違いや目開きを防止できるセグメントの連結装置などに関する。   The present invention relates to a segment connecting device and the like that can prevent so-called misalignments and openings at a connecting portion between segment joint surfaces of a segment.

シールドトンネルのトンネル壁体を形成するセグメントは、トンネル壁体の内側面を形成する弧状内面と、トンネル壁体の外側面を形成する弧状外面と、シールドトンネルの延長する方向の前後で相対峙する一対のリング継手面と、シールドトンネルの周方向で相対峙する一対のセグメント継手面とを備える。シールドトンネルを構築する工事において、一方のセグメントのセグメント継手面と他方のセグメントのセグメント継手面とをシールドトンネルの周方向で互いに向かい合わせて連結するセグメントの連結装置として、一方のセグメントのセグメント継手面に設けられた雄継手と、他方のセグメントのセグメント継手面に設けられた雌継手とを備えた連結装置が知られている。雄継手は、雌ねじ孔と有頭ボルトとワッシャとばねとにより形成される。雌ねじ孔は、一方のセグメントのセグメント継手面から一方のセグメントの内部に開口する孔の内側に設けられる。有頭ボルトは、雄ねじ部がセグメント継手面の外側から雌ねじ部にねじ嵌合される。有頭ボルトは、一方のセグメントのセグメント継手面にセグメント継手面と直交する方向に進退自在に設けられる。さらに、ワッシャが雄ねじ部に挿入され、ワッシャと有頭ボルトの頭部とがばねにより連結された構成である。雌継手は、他方のセグメントのセグメント継手面から他方のセグメントの内部に開口する雄継手収容部により形成される。雄継手収容部は、雄継手挿入部、雄ねじ部挿入溝、頭側収容部により形成される。雄継手挿入部は、雄継手を他方のセグメントのセグメント継手面に直交する方向の外側から他方のセグメントの内部に挿入できるようにセグメント継手面から内部に開口する凹部により形成される。雄ねじ部挿入溝は、有頭ボルトの雄ねじ部を雄継手挿入部から挿入し得るように雄継手挿入部に繋がりかつ他方のセグメントのセグメント継手面からセグメントの内部に開口する溝である。頭側収容部は、有頭ボルトの頭部とワッシャとを雄継手挿入部から挿入し得るように雄継手挿入部及び雄ねじ部挿入溝に繋がる溝である。以上の構成において、雄継手が、他方のセグメントのセグメント継手面と直交する方向から雄継手挿入部に挿入された後に、雄ねじ部挿入溝及び頭側収容部の方向に移動される。これにより、雄継手の雄ねじ部が雄ねじ部挿入溝に挿入されかつ雄継手の頭部とワッシャとが頭側収容部に収容されることによって、一方のセグメントのセグメント継手面と他方のセグメントのセグメント継手面とが互いに連結される。
特開２０００−５４７９５号公報 The segments forming the tunnel wall body of the shield tunnel face the arcuate inner surface that forms the inner surface of the tunnel wall body, the arcuate outer surface that forms the outer surface of the tunnel wall body, and the front and rear in the direction in which the shield tunnel extends. A pair of ring joint surfaces and a pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel are provided. When constructing a shield tunnel, the segment joint surface of one segment is used as a segment connection device that connects the segment joint surface of one segment and the segment joint surface of the other segment facing each other in the circumferential direction of the shield tunnel. There is known a connecting device provided with a male joint provided on a segment and a female joint provided on a segment joint surface of the other segment. The male joint is formed by a female screw hole, a headed bolt, a washer, and a spring. The female screw hole is provided inside a hole that opens from the segment joint surface of one segment to the inside of the one segment. In the headed bolt, the male screw portion is screwed into the female screw portion from the outside of the segment joint surface. The headed bolt is provided on the segment joint surface of one segment so as to be able to advance and retract in a direction perpendicular to the segment joint surface. Further, the washer is inserted into the male screw portion, and the washer and the head of the headed bolt are connected by a spring. The female joint is formed by a male joint housing portion that opens from the segment joint surface of the other segment to the inside of the other segment. The male joint housing part is formed by a male joint insertion part, a male screw part insertion groove, and a head side housing part. The male joint insertion portion is formed by a recess that opens from the segment joint surface to the inside so that the male joint can be inserted into the other segment from the outside in the direction orthogonal to the segment joint surface of the other segment. The male screw portion insertion groove is a groove that connects to the male joint insertion portion so that the male screw portion of the headed bolt can be inserted from the male joint insertion portion and opens from the segment joint surface of the other segment to the inside of the segment. The head side accommodating portion is a groove connected to the male joint insertion portion and the male screw portion insertion groove so that the head of the headed bolt and the washer can be inserted from the male joint insertion portion. In the above configuration, after the male joint is inserted into the male joint insertion portion from the direction orthogonal to the segment joint surface of the other segment, it is moved in the direction of the male screw portion insertion groove and the head side accommodating portion. Thus, the male joint portion of the male joint is inserted into the male screw portion insertion groove, and the head portion and the washer of the male joint are housed in the head side housing portion, so that the segment joint surface of one segment and the segment of the other segment The joint surfaces are connected to each other.
JP 2000-54795 A

しかしながら、従来のセグメントの連結装置は、一方のセグメントのセグメント継手面と他方のセグメントのセグメント継手面とが有頭ボルトの締結力によって連結された構造ではない。したがって、連結装置によって互いに連結されたセグメントの切羽側のリング継手面にシールドマシンの掘進推力が加わった場合に、雄継手のワッシャと有頭ボルトの頭部とを連結しているばねが縮むことによって、一方のセグメントの弧状内面と他方のセグメントの弧状内面との位置がずれて段差を生じたり（以下、目違いという）、一方のセグメントのセグメント継手面と他方のセグメントのセグメント継手面との間に隙間が生じ（以下、目開きという）、目違いや目開きによって生じる一方のセグメントのセグメント継手面と他方のセグメントのセグメント継手面との間の隙間からシールドトンネルのトンネル壁体内に地下水や泥水が流入するという課題があった。   However, the conventional segment connecting device does not have a structure in which the segment joint surface of one segment and the segment joint surface of the other segment are connected by the fastening force of the headed bolt. Therefore, when the thrust of the shield machine is applied to the ring joint surface on the face side of the segments connected to each other by the connecting device, the spring connecting the washer of the male joint and the head of the headed bolt will shrink. Depending on the position, the arcuate inner surface of one segment and the arcuate inner surface of the other segment are displaced from each other, creating a level difference (hereinafter referred to as a mistake), and the segment joint surface of one segment and the segment joint surface of the other segment. There is a gap between them (hereinafter referred to as an opening), and groundwater or groundwater is generated in the tunnel wall of the shield tunnel from the gap between the segment joint surface of one segment and the segment joint surface of the other segment. There was a problem that muddy water entered.

本発明は、セグメントが、シールドトンネルの延長する方向の前後で相対峙する一対のリング継手面と、シールドトンネルの周方向で相対峙する一対のセグメント継手面とを備え、シールドトンネルの周方向で互いに向かい合わされた状態の２個のセグメントのセグメント継手面同士を連結するセグメントの連結装置において、連結装置が、一方のセグメントの一方のセグメント継手面に設けられた雄継手と、他方のセグメントの他方のセグメント継手面と当該セグメント継手面に隣接する他方のリング継手面とに連続して設けられた雌継手とにより形成され、雄継手が、一方のセグメントの一方のセグメント継手面から一方のセグメントの内部に延長するように設けられた雌ねじ孔と、雄ねじ部が雌ねじ孔にねじ嵌合された有頭ボルトとを備え、雌継手が、有頭ボルトの雄ねじ部を他方のセグメントにおける他方のリング継手面から他方のセグメントの内部に挿入し得るように他方のセグメントに形成された雄ねじ部挿入溝と、有頭ボルトの頭部を他方のセグメントにおける他方のリング継手面から他方のセグメントの内部に挿入し得るように他方のセグメントに形成された頭部収容部とを備え、頭部収容部が、頭部収容部内に収容された有頭ボルトを一方のセグメントの内部の方向に進入させて有頭ボルトの頭部を雄ねじ部挿入溝の周りに押し付けて係合させることのできるように、他方のセグメントの他方のリング継手面の外側から頭部収容部内に差し込まれる工具の操作可能な大きさに形成された空間を備えたことを特徴とする。上記構成の雄継手に変えて、雄継手が、一方のセグメントの一方のセグメント継手面から突出する雄ねじ部と、雄ねじ部にねじ嵌合されたナットとを備えた構成とされたことも特徴とする。雌ねじ孔が、セグメントを形成するコンクリートに埋設されたインサートナットにより形成されたことも特徴とする。雌継手が、セグメントを形成するコンクリートに埋設されたインサート金物により形成されたことも特徴とする。
本発明のセグメントは、シールドトンネルの周方向で相対峙する一対のセグメント継手面のいずれか一方に上記記載の雄継手を備え、他方のセグメント継手面に上記記載の雌継手を備えたことを特徴とする。シールドトンネルの周方向で相対峙する一対のセグメント継手面の両方に、上記記載の雄継手、あるいは、上記記載の雌継手を備えたことも特徴とする。 The present invention includes a pair of ring joint surfaces that face each other in front and rear in the direction in which the shield tunnel extends, and a pair of segment joint faces that face each other in the circumferential direction of the shield tunnel, in the circumferential direction of the shield tunnel. In a segment coupling device that couples the segment coupling surfaces of two segments facing each other, the coupling device includes a male coupling provided on one segment coupling surface of one segment and the other of the other segment. And a female joint provided continuously on the other ring joint surface adjacent to the segment joint surface, and the male joint extends from one segment joint surface of one segment to the other segment joint surface. A female screw hole provided to extend inside, and a headed bolt in which the male screw part is screwed into the female screw hole. A male threaded portion insertion groove formed in the other segment so that the female joint can insert the male threaded portion of the headed bolt into the other segment from the other ring joint surface of the other segment; A head receiving portion formed on the other segment so that the head portion of the other segment can be inserted into the other segment from the other ring joint surface of the other segment. The headed bolt housed in the other segment of the other segment is moved so that the headed bolt can be pushed into and engaged with the male threaded portion insertion groove. It is characterized by having a space formed in a size capable of operating a tool inserted into the head receiving portion from the outside of the ring joint surface. Instead of the male joint having the above-described configuration, the male joint is characterized in that it has a configuration including a male screw portion protruding from one segment joint surface of one segment and a nut screwed to the male screw portion. To do. The female screw hole is also formed by an insert nut embedded in the concrete forming the segment. The female joint is also characterized by being formed of an insert hardware embedded in the concrete forming the segment.
The segment of the present invention includes the male joint described above on one of a pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel, and the female joint described above on the other segment joint surface. And The male joint described above or the female joint described above is provided on both of the pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel.

本発明のセグメントの連結装置によれば、一方のセグメントの一方のセグメント継手面と他方のセグメントの他方のセグメント継手面とがシールドトンネルの周方向で互いに向かい合わされた状態で雄継手の有頭ボルトあるいはナットによる締結力で互いに連結されるので、セグメントのセグメント継手面同士の連結部分でのいわゆる目違いや目開きを防止でき、シールドトンネルのトンネル壁体内への地下水や泥水の流入を防止できる。雌ねじ孔が、セグメントを形成するコンクリートに埋設されたインサートナットにより形成されたことによって、有頭ボルトの雄ねじ部が雌ねじ孔に対して着脱可能となる。よって、セグメントの運搬の際などには有頭ボルトを雌ねじ孔から取り外しておけば邪魔になることもなくなる。また、有頭ボルトに加わる力をインサートナットで受けることができ、セグメントのコンクリートのひび割れや破損を防止できる。雌継手が、セグメントを形成するコンクリートに埋設されたインサート金物により形成されたことで、コンクリートのひび割れや破損を防止できる。本発明のセグメントによれば、上記連結装置を形成できる。   According to the segment coupling device of the present invention, the head joint bolt of the male joint in a state where one segment joint surface of one segment and the other segment joint surface of the other segment face each other in the circumferential direction of the shield tunnel. Or since it mutually connects with the fastening force by a nut, what is called a mistake and opening in the connection part of the segment joint surfaces of a segment can be prevented, and inflow of groundwater and muddy water into the tunnel wall body of a shield tunnel can be prevented. Since the female screw hole is formed by an insert nut embedded in the concrete forming the segment, the male screw portion of the headed bolt can be attached to and detached from the female screw hole. Therefore, if the headed bolt is removed from the female screw hole when the segment is transported, it does not get in the way. Moreover, the force applied to the headed bolt can be received by the insert nut, and the crack and breakage of the concrete in the segment can be prevented. Since the female joint is formed of an insert hardware embedded in the concrete forming the segment, cracking and breakage of the concrete can be prevented. According to the segment of the present invention, the connecting device can be formed.

最良の形態１
図１乃至図５は最良の形態１を示し、図１はセグメントの連結装置の雄継手と雌継手とを分解して示し、図２は連結装置による連結構造をシールドトンネルの延長方向に沿った断面で示し、図３は連結装置による連結構造をシールドトンネルの径方向に沿った断面で示し、図４はセグメントの組立要領を示し、図５はシールドトンネルの構築方法を示す。 Best form 1
1 to 5 show the best mode 1, FIG. 1 shows an exploded view of a male joint and a female joint of a segment coupling device, and FIG. 2 shows a coupling structure by the coupling device along the extending direction of the shield tunnel. 3 is a cross-sectional view, FIG. 3 is a cross-sectional view of the connecting structure of the connecting device along the radial direction of the shield tunnel, FIG. 4 shows an assembling procedure of the segment, and FIG.

図５に示すように、シールド工事は、シールドマシン１の後方に複数のセグメント２を接合していって円筒壁体３を組立て、組立てた円筒壁体３の前面４でシールドマシン１の推進ジャッキ５の反力をとってシールドマシン１を推進させて地山１００を掘進してから上記円筒壁体３の前面４に新しい円筒壁体３を組立て、以後、シールドマシン１の推進と円筒壁体３の組立てとを繰り返してトンネル壁体５０を構築する。１つ１つのセグメント２は、上記円筒壁体３の中心線を基準として所定の角度間隔で分割した円筒周面の一部に相当する弧形状に形成された板状の所定厚さのコンクリート板材により形成される。すなわち、図４に示すように、セグメント２は、トンネル壁体５０の内側面を形成する弧状内面６と、トンネル壁体５０の外側面を形成する弧状外面７と、相対峙する一対のセグメント継手面８；９と、相対峙する一対のリング継手面１０；１１とを備える。セグメント継手面８；９は、シールドトンネルの延長する方向に沿った端面により形成されシールドトンネルの延長する方向、つまり、シールドマシン１の掘進方向Ａの前後で相対峙する。リング継手面１０；１１は、シールドトンネルの周方向に沿った端面により形成されシールドトンネルの周方向で相対峙する。ここでは、１つ１つのセグメント２が、トンネル壁体５０の組み立ての際に切羽側に位置される他方のリング継手面１１側から近い位置の一方のセグメント継手面８に雄継手２０を備え、かつ、トンネル壁体５０の組み立ての際に切羽側に位置される他方のリング継手面１１側から近い位置の他方のセグメント継手面９に雌継手３０を備える場合を例にして説明する。つまり、シールドトンネルの周方向で相対峙する一対のセグメント継手面８；９のうちの一方のセグメント継手面８に雄継手２０を備え、他方のセグメント継手面９に雌継手３０を備えたセグメント２を用いることによって、セグメント２；２のセグメント継手面８；９同士を連結装置１５で連結する場合を説明する。   As shown in FIG. 5, in the shield work, a plurality of segments 2 are joined to the rear of the shield machine 1 to assemble the cylindrical wall body 3, and the propulsion jack of the shield machine 1 is formed on the front surface 4 of the assembled cylindrical wall body 3. 5, the shield machine 1 is propelled by driving the shield machine 1 and excavating the natural ground 100, and then a new cylindrical wall body 3 is assembled on the front surface 4 of the cylindrical wall body 3. The tunnel wall body 50 is constructed by repeating the assembly of 3. Each segment 2 is a plate-like concrete plate having a predetermined thickness formed in an arc shape corresponding to a part of a cylindrical peripheral surface divided at a predetermined angular interval with respect to the center line of the cylindrical wall 3. It is formed by. That is, as shown in FIG. 4, the segment 2 includes a pair of segment joints facing each other with an arcuate inner surface 6 that forms the inner surface of the tunnel wall body 50 and an arcuate outer surface 7 that forms the outer surface of the tunnel wall body 50. And a pair of ring joint surfaces 10; 11 facing each other. The segment joint surfaces 8; 9 are formed by end faces along the extending direction of the shield tunnel, and are opposed to each other in the extending direction of the shield tunnel, that is, before and after the digging direction A of the shield machine 1. The ring joint surfaces 10; 11 are formed by end faces along the circumferential direction of the shield tunnel and are opposed to each other in the circumferential direction of the shield tunnel. Here, each segment 2 includes a male joint 20 on one segment joint surface 8 at a position close to the other ring joint surface 11 that is located on the face side when the tunnel wall 50 is assembled. An example in which the female joint 30 is provided on the other segment joint surface 9 at a position close to the other ring joint surface 11 located on the face side when the tunnel wall 50 is assembled will be described. That is, the segment 2 having the male joint 20 on one segment joint surface 8 of the pair of segment joint surfaces 8; 9 facing each other in the circumferential direction of the shield tunnel and the female joint 30 on the other segment joint surface 9. The case where the segment joint surfaces 8; 9 of the segments 2; 2 are connected by the connecting device 15 will be described.

図１に示すように、最良の形態１によるセグメントの連結装置１５は、シールドトンネルの周方向で互いに向かい合わされて連結される一方のセグメント２Ａの一方のセグメント継手面８に設けられた雄継手２０と、他方のセグメント２Ｂの他方のセグメント継手面９及び当該セグメント継手面９と隣接する他方のリング継手面１１に設けられた雌継手３０とにより形成される。   As shown in FIG. 1, the segment connecting device 15 according to the best mode 1 is a male joint 20 provided on one segment joint surface 8 of one segment 2 </ b> A connected to face each other in the circumferential direction of the shield tunnel. And the female joint 30 provided on the other ring joint surface 11 of the other segment 2B and the other ring joint surface 11 adjacent to the segment joint surface 9.

雄継手２０は、雌ねじ孔２１と有頭ボルト２２とにより形成される。雌ねじ孔２１は、一方のセグメント２Ａの一方のセグメント継手面８から一方のセグメント２Ａの内部に延長するように設けられる。有頭ボルト２２の雄ねじ部２３がセグメント継手面８の外側から雌ねじ孔２１にねじ嵌合されることで雄継手２０が形成される。雌ねじ孔２１は、外周に螺旋状に形成されたコンクリートに対する定着凹凸部２８（図２参照）を有した鉄筋棒２４の端面から鉄筋棒２４の中心軸に沿って内側に延長するように形成される。雌ねじ孔２１は、雌ねじ孔２１の形成された鉄筋棒２４を図外の型枠に設置して型枠内に生コンクリートを流し込んでコンクリートを固まらせることによって一方のセグメント２Ａのセグメント継手面８から一方のセグメント２Ａの内部に延長するよう一方のセグメント２Ａの内部に埋設されたいわゆるインサートナット２６により形成される。インサートナット２６は定着凹凸部２８によりコンクリートから脱落しない。インサートナット２６を備えたので、有頭ボルト２２の雄ねじ部２３が雌ねじ孔２１に対して着脱可能となり、セグメント２の運搬の際などには有頭ボルト２２を雌ねじ孔２１から取り外しておけば邪魔になることもない。また、有頭ボルト２２に加わる力をインサートナット２６で受けることができるので、セグメント２のコンクリートのひび割れや破損を防止できる。   The male joint 20 is formed by a female screw hole 21 and a headed bolt 22. The female screw hole 21 is provided so as to extend from one segment joint surface 8 of one segment 2A to the inside of one segment 2A. A male joint 20 is formed by screwing the male screw portion 23 of the headed bolt 22 into the female screw hole 21 from the outside of the segment joint surface 8. The female screw hole 21 is formed so as to extend inwardly along the central axis of the reinforcing bar 24 from the end surface of the reinforcing bar 24 having the fixing uneven portion 28 (see FIG. 2) for the concrete spirally formed on the outer periphery. The The female screw hole 21 is formed from the segment joint surface 8 of one segment 2A by placing a reinforcing bar 24 in which the female screw hole 21 is formed in a mold frame (not shown) and pouring the ready-mixed concrete into the mold frame to solidify the concrete. It is formed by a so-called insert nut 26 embedded in one segment 2A so as to extend inside one segment 2A. The insert nut 26 is not dropped from the concrete by the fixing uneven portion 28. Since the insert nut 26 is provided, the male threaded portion 23 of the headed bolt 22 can be attached to and detached from the female threaded hole 21. When the segment 2 is transported, it is not necessary to remove the headed bolt 22 from the female threaded hole 21. It will never be. Moreover, since the force added to the headed bolt 22 can be received with the insert nut 26, the crack and damage of the concrete of the segment 2 can be prevented.

雌継手３０は、雄ねじ部挿入溝３１と頭部収容部３２とにより形成される。雄ねじ部挿入溝３１は、セグメント継手面８より外方に突出する有頭ボルト２２の雄ねじ部２３を他方のセグメント２Ｂにおける他方のリング継手面１１から他方のセグメント２Ｂの内部に挿入し得るように有頭ボルト２２の雄ねじ部２３の直径より大きくかつ有頭ボルト２２の頭部２５の直径より小さい溝幅Ｈ１を有しかつ他方のセグメント２Ｂの他方のセグメント継手面９及び他方のリング継手面１１から他方のセグメント２Ｂの内部に開口する構成である。頭部収容部３２は、有頭ボルト２２の頭部２５を他方のセグメント２Ｂにおける他方のリング継手面１１から他方のセグメント２Ｂの内部に挿入し得るように有頭ボルト２２の頭部２５の直径より大きい溝幅Ｈ２を有しかつ他方のセグメント２Ｂにおける他方のリング継手面１１から他方のセグメント２Ｂの内部に開口するとともに雄ねじ部挿入溝３１に繋がる構成である。雄ねじ部挿入溝３１及び頭部収容部３２は、他方のセグメント２Ｂにおける他方のリング継手面１１から一方のリング継手面１０の方向に所定の長さだけ延長する。頭部収容部３２の空間３７は、有頭ボルト２２を一方のセグメント２Ａの内部の方向に進入させて有頭ボルト２２の頭部２５を頭部収容部３２側から雄ねじ部挿入溝３１の周り、つまり、雄ねじ部挿入溝３１と連続する頭部収容部３２の内面である受圧面３３に押し付けて係合させることができるように、他方のセグメント２Ｂの他方のリング継手面１１に繋がる頭部収容部３２の開口から差し込まれるラチェットレンチやスパナのようなねじ回しのための工具３４（図２参照）を他方のリング継手面１１の外側から操作可能な大きさに形成される。雌継手３０は、雄ねじ部挿入溝３１と頭部収容部３２と定着凹凸部３８とを備えた金物を図外の型枠に設置して型枠内に生コンクリートを流し込んでコンクリートを固まらせることによって他方のセグメント２Ｂのコンクリート内に埋設されたいわゆるインサート金物３５により形成される。インサート金物３５はコンクリートに対する定着凹凸部３８を備えるのでコンクリートから脱落しない。雄ねじ部挿入溝３１と頭部収容部３２とがインサート金物３５により形成されたことで、セグメント２のコンクリートに直接的に雄ねじ部挿入溝と頭部収容部とを形成した場合に比べてセグメント２のコンクリートのひび割れや破損を防止できる。   The female joint 30 is formed by the male screw portion insertion groove 31 and the head accommodating portion 32. The male thread portion insertion groove 31 is configured so that the male thread portion 23 of the headed bolt 22 protruding outward from the segment joint surface 8 can be inserted into the other segment 2B from the other ring joint surface 11 of the other segment 2B. The other segment joint surface 9 and the other ring joint surface 11 of the other segment 2B have a groove width H1 that is larger than the diameter of the male screw portion 23 of the headed bolt 22 and smaller than the diameter of the head 25 of the headed bolt 22. To the other segment 2B. The head receiving portion 32 has a diameter of the head 25 of the headed bolt 22 so that the head 25 of the headed bolt 22 can be inserted into the other segment 2B from the other ring joint surface 11 of the other segment 2B. It has a larger groove width H2 and opens from the other ring joint surface 11 of the other segment 2B to the inside of the other segment 2B and is connected to the male thread portion insertion groove 31. The male thread portion insertion groove 31 and the head accommodating portion 32 extend by a predetermined length from the other ring joint surface 11 in the other segment 2B toward the one ring joint surface 10. The space 37 of the head accommodating part 32 is made to approach the head 25 of the headed bolt 22 from the side of the head accommodating part 32 around the male screw part insertion groove 31 by allowing the headed bolt 22 to enter the direction inside the one segment 2A. That is, the head connected to the other ring joint surface 11 of the other segment 2B so that it can be pressed and engaged with the pressure receiving surface 33 which is the inner surface of the head accommodating portion 32 that is continuous with the male screw portion insertion groove 31. A tool 34 (see FIG. 2) for screwing such as a ratchet wrench or a spanner inserted from the opening of the accommodating portion 32 is formed in a size that can be operated from the outside of the other ring joint surface 11. The female joint 30 is configured to install a metal fitting having a male screw portion insertion groove 31, a head accommodating portion 32, and a fixing uneven portion 38 in a mold frame (not shown) and to pour green concrete into the mold frame to solidify the concrete. Is formed by a so-called insert hardware 35 embedded in the concrete of the other segment 2B. The insert hardware 35 is provided with a fixing uneven portion 38 for the concrete, and therefore does not fall off from the concrete. Since the male screw portion insertion groove 31 and the head receiving portion 32 are formed by the insert hardware 35, the segment 2 is compared with the case where the male screw portion insertion groove and the head receiving portion are directly formed in the concrete of the segment 2. Can prevent cracking and breakage of concrete.

シールドトンネルの構築方法を説明する。既に組立てた円筒壁体３（図４；５参照）の前面４で推進ジャッキ５の反力をとってシールドマシン１を推進させて地山１００を掘進し、そして、シールドマシン１の後方に新たな円筒壁体３を組み立てて行く。この際、既に組立てた円筒壁体３の切羽側に新たにセグメント２を連結していく場合において、まず、他方のセグメント２Ｂの一方のリング継手面１０より突出するピン４０を円筒壁体３のセグメント２の他方のリング継手面１１に形成されたピン受孔４１内に入れて他方のセグメント２Ｂの一方のリング継手面１０と円筒壁体３のセグメント２の他方のリング継手面１１とを突き合わせる。そして、図１の矢示Ｂで示すように、一方のセグメント２Ａの一方のセグメント継手面８より突出する有頭ボルト２２の頭部２５と雄ねじ部２３とを、他方のセグメント２Ｂの他方のリング継手面１１に繋がる雄ねじ部挿入溝３１と頭部収容部３２との開口から雄ねじ部挿入溝３１内と頭部収容部３２内に挿入して一方のセグメント２Ａを円筒壁体３の他方のリング継手面１１の方向に移動させ、一方のセグメント２Ａの一方のリング継手面１０より突出するように設けられたピン４０を円筒壁体３のセグメント２のリング継手面１１に形成されたピン受孔４１内に入れて一方のセグメント２Ａのリング継手面１０と円筒壁体３のセグメント２のリング継手面１１とを突き合わせる。その後、図２のように、一方のセグメント２Ａの他方のリング継手面１１の開口から頭部収容部３２内に工具３４を差し込んで、この工具３４のボルト頭掴み部３６を有頭ボルト２２の頭部２５に装着し、他方のセグメント２Ｂのリング継手面１１よりも外側、つまり、人が切羽側から工具３４を操作して有頭ボルト２２を一方のセグメント２Ａの内部の方向に進入させることによって、有頭ボルト２２の頭部２５を頭部収容部３２側から雄ねじ部挿入溝３１の周りの受圧面３３に押し付けるように係合させる。つまり、頭部２５が受圧面３３を押圧した状態に有頭ボルト２２が雌ねじ孔２１に締結されることによって、一方のセグメント２Ａの一方のセグメント継手面８と他方のセグメント２Ｂの他方のセグメント継手面９とがシールドトンネルの周方向で互いに向かい合わされて連結される。以後、上記と同様にして、セグメント２を周方向に順次連結していくことで円筒壁体３を形成する。そして、完成した円筒壁体３の切羽側のリング継手面１１により形成される円筒壁体３の前面４でシールドマシン１の推進ジャッキ５の反力をとってシールドマシン１を推進させる。この際、円筒壁体３を形成する複数のセグメント２は、セグメント継手面８；９同士が連結装置１５の有頭ボルト２２の締め付けによって互いに強く連結されているので、シールドマシン１による反力が円筒壁体３の前面４にかかった場合に、目違いや目開きを防止できる。つまり、一方のセグメント２Ａの一方のセグメント継手面８と他方のセグメント２Ｂの他方のセグメント継手面９とがシールドトンネルの周方向で互いに向かい合わされた状態で有頭ボルト２２の締結力によって強固に連結されるので、目違いや目開きを防止でき、シールドトンネルのトンネル壁体５０内への地下水や泥水の流入を防止できる。   A method for constructing a shield tunnel will be described. The shield machine 1 is propelled by using the reaction force of the propulsion jack 5 on the front surface 4 of the already assembled cylindrical wall 3 (see FIGS. 4 and 5), and the ground 100 is dug. A cylindrical wall 3 is assembled. At this time, when the segment 2 is newly connected to the face side of the already assembled cylindrical wall body 3, first, the pin 40 protruding from the one ring joint surface 10 of the other segment 2B is connected to the cylindrical wall body 3. One ring joint surface 10 of the other segment 2B and the other ring joint surface 11 of the segment 2 of the cylindrical wall 3 are butted into a pin receiving hole 41 formed on the other ring joint surface 11 of the segment 2. The Then, as shown by an arrow B in FIG. 1, the head 25 and the male screw portion 23 of the headed bolt 22 projecting from one segment joint surface 8 of one segment 2A are connected to the other ring of the other segment 2B. The segment 2A is inserted into the male screw portion insertion groove 31 and the head portion receiving portion 32 from the opening of the male screw portion insertion groove 31 and the head accommodating portion 32 connected to the joint surface 11, and the one segment 2A is inserted into the other ring of the cylindrical wall body 3. A pin receiving hole formed in the ring joint surface 11 of the segment 2 of the cylindrical wall 3 by moving the pin 40 provided so as to move in the direction of the joint surface 11 and project from the one ring joint surface 10 of the one segment 2A. 41, the ring joint surface 10 of one segment 2A and the ring joint surface 11 of the segment 2 of the cylindrical wall 3 are butted together. Thereafter, as shown in FIG. 2, the tool 34 is inserted into the head accommodating portion 32 from the opening of the other ring joint surface 11 of the one segment 2 </ b> A, and the bolt head gripping portion 36 of the tool 34 is inserted into the headed bolt 22. Attached to the head 25, the person operates the tool 34 from the outside of the ring joint surface 11 of the other segment 2B, that is, from the face side, and causes the headed bolt 22 to enter the direction inside the one segment 2A. Thus, the head 25 of the headed bolt 22 is engaged so as to be pressed against the pressure receiving surface 33 around the male screw portion insertion groove 31 from the head housing portion 32 side. That is, the headed bolt 22 is fastened to the female screw hole 21 in a state where the head 25 presses the pressure receiving surface 33, whereby one segment joint surface 8 of one segment 2A and the other segment joint of the other segment 2B. The surfaces 9 are connected to face each other in the circumferential direction of the shield tunnel. Thereafter, similarly to the above, the cylindrical wall body 3 is formed by sequentially connecting the segments 2 in the circumferential direction. Then, the shield machine 1 is propelled by the reaction force of the propulsion jack 5 of the shield machine 1 on the front surface 4 of the cylindrical wall body 3 formed by the ring joint surface 11 on the face side of the completed cylindrical wall body 3. At this time, since the plurality of segments 2 forming the cylindrical wall 3 are strongly connected to each other by tightening the headed bolts 22 of the connecting device 15 between the segment joint surfaces 8; When it hits the front surface 4 of the cylindrical wall body 3, it is possible to prevent mistaking or opening. That is, one segment joint surface 8 of one segment 2A and the other segment joint surface 9 of the other segment 2B are firmly connected by the fastening force of the headed bolt 22 in a state where they face each other in the circumferential direction of the shield tunnel. Therefore, it is possible to prevent mistakes and openings, and to prevent inflow of groundwater and muddy water into the tunnel wall 50 of the shield tunnel.

最良の形態２
図６に示すように、雄継手２０を、一方のセグメント２Ａの一方のセグメント継手面８から突出する雄ねじ部５１と、雄ねじ部５１にねじ嵌合されたナット５２とにより形成し、頭部収容部３２をナット収容部として機能させてもよい。最良の形態２の構成の連結装置であっても最良の形態１と同じ効果が得られることは容易に理解できるであろう。この場合、雄ねじ部５１がインサートナット２６による雌ねじ孔２１にねじ嵌合された構成とすれば、セグメント２の運搬の際などには雄ねじ部５１を雌ねじ孔２１から取り外しておけば邪魔になることもない。 Best form 2
As shown in FIG. 6, the male joint 20 is formed by a male screw part 51 projecting from one segment joint surface 8 of one segment 2 </ b> A and a nut 52 screwed to the male screw part 51. The portion 32 may function as a nut housing portion. It will be easily understood that the same effect as in the best mode 1 can be obtained even with the coupling device having the best mode 2. In this case, if the male threaded portion 51 is screwed into the female threaded hole 21 by the insert nut 26, it will be an obstacle if the male threaded part 51 is removed from the female threaded hole 21 when the segment 2 is transported. Nor.

セグメント２のコンクリートに直接的に雌継手３０を形成してもよい。最良の形態２の雄ねじ部５１をセグメント２を形成するコンクリートに直接的に埋め込むようにして設けてもよい。シールドトンネルの周方向で相対峙する一対のセグメント継手面８：９の両方に雄継手２０；２０を設けたセグメント２と、シールドトンネルの周方向で相対峙する一対のセグメント継手面８；９の両方に雌継手３０；３０を設けたセグメント２とを用いて、シールドトンネルの周方向にこれらを交互に配置して連結装置１５で連結していくことも可能である。有頭ボルト２２としては、六角柱状の頭部２５を有した通常の六角ボルトの他に、頭部の下部が頭部の上部より大径のフランジに形成されたフランジ付きボルトや、六角柱状の頭部２５の上面に六角柱状の六角レンチ挿入用の凹部の形成された六角凹部付きボルトなどを使用してもよい。フランジ付きボルトを使用すればフランジが受圧面３３と接触することで頭部と受圧面３３との接触面積が多くなって締結力を高めることができる。六角凹部付きボルトを使用すれば六角レンチのような小さな工具を用いることができる。   The female joint 30 may be formed directly on the concrete of the segment 2. The male thread 51 of the best mode 2 may be provided so as to be directly embedded in the concrete forming the segment 2. A pair of segment joint surfaces 8: 9 facing each other in the circumferential direction of the shield tunnel and a segment 2 provided with male joints 20; 20 and a pair of segment joint surfaces 8; 9 facing each other in the circumferential direction of the shield tunnel It is also possible to use the segment 2 provided with the female joints 30; 30 on both sides and alternately arrange them in the circumferential direction of the shield tunnel and connect them with the connecting device 15. As the headed bolt 22, in addition to a normal hexagonal bolt having a hexagonal columnar head 25, a flanged bolt in which the lower part of the head is formed in a flange having a larger diameter than the upper part of the head, You may use the hexagonal recessed bolt etc. in which the recessed part for hexagonal column-shaped hexagon wrench insertion was formed in the upper surface of the head 25. FIG. If a bolt with a flange is used, the contact area between the head and the pressure receiving surface 33 is increased by the flange coming into contact with the pressure receiving surface 33, and the fastening force can be increased. If a hexagonal recessed bolt is used, a small tool such as a hexagon wrench can be used.

セグメントの連結装置の雄継手と雌継手とを分解した分解斜視図（最良の形態１）。The disassembled perspective view which decomposed | disassembled the male joint and female joint of the connection apparatus of a segment (best form 1). 連結装置による連結構造をシールドトンネルの延長方向に沿った断面で示す断面図（最良の形態１）。Sectional drawing which shows the connection structure by a connection apparatus in the cross section along the extension direction of a shield tunnel (best form 1). 連結装置による連結構造をシールドトンネルの径方向に沿った断面で示す断面図（最良の形態１）。Sectional drawing which shows the connection structure by a connection device in the cross section along the radial direction of a shield tunnel (best form 1). セグメントの組立要領を示す斜視図（最良の形態１）。The perspective view which shows the assembly procedure of a segment (best form 1). シールドトンネルの構築方法を示す断面図（最良の形態１）。Sectional drawing which shows the construction method of a shield tunnel (best form 1). 連結装置による連結構造をシールドトンネルの延長方向に沿った断面で示す断面図（最良の形態２）。Sectional drawing which shows the connection structure by a connection apparatus in the cross section along the extension direction of a shield tunnel (best form 2).

符号の説明Explanation of symbols

２ セグメント、２Ａ 一方のセグメント、２Ｂ 他方のセグメント、
８；９ セグメント継手面、１０；１１ リング継手面、
１５ 連結装置、２０ 雄継手、２１ 雌ねじ孔、２２ 有頭ボルト、
２３ 雄ねじ部、２５ 頭部、２６ インサートナット、３０ 雌継手、
３１ 雄ねじ部挿入溝、３２ 頭部収容部開口、３４ 工具、
３５ インサート金物、３７ 空間、５１ 雄ねじ部、５２ ナット 2 segments, 2A one segment, 2B the other segment,
8; 9 segment joint surface, 10; 11 ring joint surface,
15 coupling device, 20 male joint, 21 female screw hole, 22 headed bolt,
23 male thread, 25 head, 26 insert nut, 30 female joint,
31 Male thread insertion groove, 32 Head housing opening, 34 Tool,
35 Insert hardware, 37 space, 51 male thread, 52 nut

Claims (6)

セグメントが、シールドトンネルの延長する方向の前後で相対峙する一対のリング継手面と、シールドトンネルの周方向で相対峙する一対のセグメント継手面とを備え、シールドトンネルの周方向で互いに向かい合わされた状態の２個のセグメントのセグメント継手面同士を連結するセグメントの連結装置において、連結装置が、一方のセグメントのセグメント継手面に設けられた雄継手と、他方のセグメントのセグメント継手面と当該セグメント継手面に隣接するリング継手面とに連続して設けられた雌継手とにより形成され、雄継手が、一方のセグメントのセグメント継手面からセグメントの内部に延長するように設けられた雌ねじ孔と、雄ねじ部が雌ねじ孔にねじ嵌合された有頭ボルトとを備え、雌継手が、有頭ボルトの雄ねじ部をリング継手面からセグメントの内部に挿入し得るように他方のセグメントに形成された雄ねじ部挿入溝と、有頭ボルトの頭部をリング継手面から他方のセグメントの内部に挿入し得るように他方のセグメントに形成された頭部収容部とを備え、頭部収容部が、頭部収容部内に収容された有頭ボルトを一方のセグメントの内部の方向に進入させて有頭ボルトの頭部を雄ねじ部挿入溝の周りに押し付けて係合させることのできるように、他方のセグメントのリング継手面の外側から頭部収容部内に差し込まれる工具の操作可能な大きさに形成された空間を備えたことを特徴とするセグメントの連結装置。   The segment includes a pair of ring joint surfaces facing each other in the longitudinal direction of the shield tunnel and a pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel, and facing each other in the circumferential direction of the shield tunnel. In a segment coupling device that couples the segment joint surfaces of two segments in a state, the coupling device includes a male joint provided on the segment joint surface of one segment, a segment joint surface of the other segment, and the segment joint A female joint provided continuously with a ring joint surface adjacent to the surface, and a male thread extending from the segment joint surface of one segment to the inside of the segment; And a headed bolt that is screwed into the female screw hole. Male threaded part insertion groove formed in the other segment so that it can be inserted into the segment from the joint surface, and the other head so that the head of the headed bolt can be inserted into the other segment from the ring joint surface. A head receiving portion formed in the segment, and the head receiving portion allows the headed bolt housed in the head receiving portion to enter the inside of one segment and the head of the headed bolt to be externally threaded. It was provided with a space formed in a size that can be operated by a tool inserted into the head receiving portion from the outside of the ring joint surface of the other segment so that it can be pressed and engaged around the portion insertion groove. A segment connecting device characterized by the above. セグメントが、シールドトンネルの延長する方向の前後で相対峙する一対のリング継手面と、シールドトンネルの周方向で相対峙する一対のセグメント継手面とを備え、シールドトンネルの周方向で互いに向かい合わされた状態の２個のセグメントのセグメント継手面同士を連結するセグメントの連結装置において、連結装置が、一方のセグメントのセグメント継手面に設けられた雄継手と、他方のセグメントのセグメント継手面と当該セグメント継手面に隣接するリング継手面とに連続して設けられた雌継手とにより形成され、雄継手が、一方のセグメントのセグメント継手面から突出する雄ねじ部と、雄ねじ部にねじ嵌合されたナットとを備え、雌継手が、有頭ボルトの雄ねじ部をリング継手面からセグメントの内部に挿入し得るように他方のセグメントに形成された雄ねじ部挿入溝と、有頭ボルトの頭部をリング継手面から他方のセグメントの内部に挿入し得るように他方のセグメントに形成された頭部収容部とを備え、頭部収容部が、頭部収容部内に収容された有頭ボルトを一方のセグメントの内部の方向に進入させて有頭ボルトの頭部を雄ねじ部挿入溝の周りに押し付けて係合させることのできるように、他方のセグメントのリング継手面の外側から頭部収容部内に差し込まれる工具の操作可能な大きさに形成された空間を備えたことを特徴とするセグメントの連結装置。   The segment includes a pair of ring joint surfaces facing each other in the longitudinal direction of the shield tunnel and a pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel, and facing each other in the circumferential direction of the shield tunnel. In a segment coupling device that couples the segment joint surfaces of two segments in a state, the coupling device includes a male joint provided on the segment joint surface of one segment, a segment joint surface of the other segment, and the segment joint A male joint provided continuously with a ring joint surface adjacent to the surface, the male joint projecting from the segment joint surface of one segment, and a nut screwed into the male thread portion. So that the male threaded part of the headed bolt can be inserted into the segment from the ring joint surface. A male screw portion insertion groove formed in the other segment, and a head accommodating portion formed in the other segment so that the head of the headed bolt can be inserted into the other segment from the ring joint surface, The head accommodating portion allows the headed bolt accommodated in the head accommodating portion to enter in the direction of the inside of one segment and press the head of the headed bolt around the male screw portion insertion groove to be engaged. A segment connecting device comprising a space formed to have a size capable of operating a tool inserted into the head accommodating portion from the outside of the ring joint surface of the other segment. 雌ねじ孔が、セグメントを形成するコンクリートに埋設されたインサートナットにより形成されたことを特徴とする請求項１又は請求項２に記載のセグメントの連結装置。   3. The segment connecting device according to claim 1, wherein the female screw hole is formed by an insert nut embedded in the concrete forming the segment. 雌継手が、セグメントを形成するコンクリートに埋設されたインサート金物により形成されたことを特徴とする請求項１乃至請求項３のいずれかに記載のセグメントの連結装置。   The segment coupling device according to any one of claims 1 to 3, wherein the female joint is formed of an insert hardware embedded in concrete forming the segment. シールドトンネルの周方向で相対峙する一対のセグメント継手面のいずれか一方に請求項１乃至請求項４のいずれかに記載の雄継手を備え、他方のセグメント継手面に請求項１乃至請求項４のいずれかに記載の雌継手を備えたことを特徴とするセグメント。   The male joint according to any one of claims 1 to 4 is provided on any one of a pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel, and the other segment joint surface is provided with claims 1 to 4. A segment comprising the female joint according to any one of the above. シールドトンネルの周方向で相対峙する一対のセグメント継手面の両方に、請求項１乃至請求項４のいずれかに記載の雄継手、あるいは、請求項１乃至請求項４のいずれかに記載の雌継手を備えたことを特徴とするセグメント。   The male joint according to any one of claims 1 to 4 or the female according to any one of claims 1 to 4 is provided on both of the pair of segment joint surfaces facing each other in the circumferential direction of the shield tunnel. A segment characterized by having a joint.
JP2005338737A 2005-11-24 2005-11-24 Segment coupling device Expired - Fee Related JP4619276B2 (en)

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JP2012097515A (en) * 2010-11-04 2012-05-24 Ohbayashi Corp Connection structure of precast member
CN103821535A (en) * 2014-03-06 2014-05-28 中铁第一勘察设计院集团有限公司 Shield method tunnel lining structure pre-buried groove connecting element and installing method thereof
CN105649662A (en) * 2016-03-01 2016-06-08 中铁二院工程集团有限责任公司 Embedded sliding chute anchor leg extension connection member used in tunnel
CN111411997A (en) * 2020-05-20 2020-07-14 浙江省交通规划设计研究院有限公司 Shield segment dislocation correction device and method

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CN104632232B (en) * 2015-02-04 2016-12-28 北京市政建设集团有限责任公司 A kind of large diameter shield tunnel that digs builds the section of jurisdiction method for dismounting of subway station

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JP2004293172A (en) * 2003-03-27 2004-10-21 Kajima Corp Joint structure of segment

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JP2012097515A (en) * 2010-11-04 2012-05-24 Ohbayashi Corp Connection structure of precast member
CN103821535A (en) * 2014-03-06 2014-05-28 中铁第一勘察设计院集团有限公司 Shield method tunnel lining structure pre-buried groove connecting element and installing method thereof
CN105649662A (en) * 2016-03-01 2016-06-08 中铁二院工程集团有限责任公司 Embedded sliding chute anchor leg extension connection member used in tunnel
CN111411997A (en) * 2020-05-20 2020-07-14 浙江省交通规划设计研究院有限公司 Shield segment dislocation correction device and method

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