JP7506010B2 - Water-stopping structure - Google Patents

Water-stopping structure Download PDF

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JP7506010B2
JP7506010B2 JP2021037188A JP2021037188A JP7506010B2 JP 7506010 B2 JP7506010 B2 JP 7506010B2 JP 2021037188 A JP2021037188 A JP 2021037188A JP 2021037188 A JP2021037188 A JP 2021037188A JP 7506010 B2 JP7506010 B2 JP 7506010B2
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water
joining
tunnel
stopping
plate
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JP2022137623A (en
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涼介 平木
健雄 望戸
直史 井上
慶樹 重松
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Kajima Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Description

本発明は、止水構造に関する。 The present invention relates to a water-stopping structure.

トンネルなどの地下構造物を地震時等の地盤変位に追従させるため、隣接する地下構造物同士を可撓継手によって接続することがある。可撓継手は可撓性を有する継手であり、その変形により地下構造物同士の相対変位を吸収すると同時に、隣接する地下構造物の間から地下水が浸入するのを防ぐ止水構造を構成する。 To allow underground structures such as tunnels to adapt to ground displacement during earthquakes and other events, adjacent underground structures are sometimes connected by flexible joints. Flexible joints are flexible joints that absorb the relative displacement between underground structures by deforming, while at the same time forming a water-stopping structure that prevents groundwater from seeping in between adjacent underground structures.

特許文献１には、可撓継手を用いた地下構造物の止水構造の例として、隣接するコンクリート部材のそれぞれに継手枠体を設け、継手枠体間に可撓継手を架設し、継手枠体とコンクリート部材の間に高吸水性樹脂を配置したものが記載されている。可撓継手は地下水がコンクリート部材の間を通って浸入するのを防止し、高吸水性樹脂は、継手枠体とコンクリート部材の隙間からの地下水の浸入を防止する。 Patent Document 1 describes an example of a waterproof structure for underground structures that uses flexible joints, in which a joint frame is provided for each of adjacent concrete members, flexible joints are installed between the joint frames, and a superabsorbent resin is placed between the joint frames and the concrete members. The flexible joints prevent groundwater from seeping in through gaps between the concrete members, and the superabsorbent resin prevents groundwater from seeping in through gaps between the joint frames and the concrete members.

特開２００４－３４６５９２号公報JP 2004-346592 A

トンネルの構築方法として、複数のセグメントをトンネルの断面の周方向やトンネルの軸方向に接合するものがある。各セグメントにおいて、他のセグメントと接合する接合面には止水部材が配置され、隣り合うセグメントを接合する際に両セグメントの間で止水部材を押し潰すことで、セグメント間の止水を実現する。 One method of constructing a tunnel is to join multiple segments in the circumferential direction of the tunnel's cross section or in the axial direction of the tunnel. A water-stopping material is placed on the joint surface of each segment where it joins with other segments, and when joining adjacent segments, the water-stopping material is crushed between the two segments to achieve water-stopping between the segments.

しかしながら、トンネルの端部を立坑など他の地下構造物と可撓継手によって接続する場合、上記の方法でトンネルの端部と他の地下構造物との間の止水を実現するのは難しい。トンネルの端部のセグメントを接続対象の地下構造物に押し付け、セグメントの接続対象の地下構造物側の接合面に設けられた止水部材を押し潰すことが難しいためである。 However, when connecting the end of a tunnel to another underground structure, such as a shaft, with a flexible joint, it is difficult to achieve watertightness between the end of the tunnel and the other underground structure using the above method. This is because it is difficult to press the segment at the end of the tunnel against the underground structure to be connected and to crush the watertight member provided on the joint surface of the segment on the side of the underground structure to be connected.

本発明は上記の問題に鑑みてなされたものであり、その目的は、可撓継手による接続部において容易に止水を実現できる止水構造等を提供することである。 The present invention was made in consideration of the above problems, and its purpose is to provide a water-stopping structure that can easily achieve water-stopping at connections made with flexible joints.

前述した目的を達成するための本発明は、地下構造物同士の接続部における止水構造であって、一方の地下構造物は止水部材を有し、帯状の可撓継手の幅方向の一方の端部が他方の地下構造物に取付けられ、前記可撓継手の幅方向の他方の端部が接合プレートに固定され、前記接合プレートが、前記一方の地下構造物の前記他方の地下構造物側に面した接合面において、前記一方の地下構造物と接合され、当該接合面に設けられた前記止水部材が、前記接合プレートにより押し潰されたことを特徴とする止水構造である。 To achieve the above-mentioned object, the present invention is a water-stopping structure at a connection between underground structures, in which one underground structure has a water-stopping member, one end in the width direction of a band-shaped flexible joint is attached to the other underground structure, and the other end in the width direction of the flexible joint is fixed to a joining plate, and the joining plate is joined to one of the underground structures at a joining surface of the one underground structure facing the other underground structure, and the water-stopping member provided on the joining surface is crushed by the joining plate.

前述した目的を達成するための第１の発明は、地下構造物同士の接続部における止水構造であって、一方の地下構造物は箱型部材から構成され、止水部材を有し、帯状の可撓継手の幅方向の一方の端部が他方の地下構造物に取付けられ、前記可撓継手の幅方向の他方の端部が接合プレートに固定され、前記接合プレートが、前記箱型部材の前記他方の地下構造物側に面した接合面において、前記箱型部材と接合され、当該接合面に設けられた前記止水部材が、前記接合プレートにより押し潰され、前記箱型部材と前記接合プレートは、前記接合面の内側に固定されて前記接合面の孔から突出するボルトを前記接合プレートの孔に通し、前記接合プレートから突出する前記ボルトの突出部分にナットを締め込むことで接合され、前記ナットと前記接合プレートの間に止水ワッシャーが設けられたことを特徴とする止水構造である。
第２の発明は、地下構造物同士の接続部における止水構造であって、一方の地下構造物は止水部材を有し、帯状の可撓継手の幅方向の一方の端部が他方の地下構造物に取付けられ、前記可撓継手の幅方向の他方の端部が接合プレートに固定され、前記接合プレートが、前記一方の地下構造物の前記他方の地下構造物側に面した接合面において、前記一方の地下構造物と接合され、当該接合面に設けられた前記止水部材が、前記接合プレートにより押し潰され、前記一方の地下構造物がトンネル、前記他方の地下構造物が立坑であり、前記立坑の壁体に、前記立坑の外側に向かって段状に拡幅する開口が設けられ、前記トンネルの前記立坑側の端部が、前記開口の外側の拡幅部分に挿入され、前記トンネルの前記立坑側の端部と、当該端部と対向する位置にある前記拡幅部分の壁体との間の隙間には、弾性を有する間詰材が配置されることを特徴とする止水構造である。 The first invention for achieving the above-mentioned object is a water-stopping structure at a connection between underground structures, wherein one underground structure is composed of a box-shaped member and has a water-stopping member, one end of a band-shaped flexible joint in the width direction is attached to the other underground structure, and the other end of the flexible joint in the width direction is fixed to a joining plate, the joining plate is joined to the box- shaped member at a joining surface facing the other underground structure of the box-shaped member , the water-stopping member provided on the joining surface is crushed by the joining plate , the box-shaped member and the joining plate are joined by passing a bolt fixed to the inside of the joining surface and protruding from a hole in the joining surface through a hole in the joining plate and tightening a nut on the protruding part of the bolt protruding from the joining plate, and a water-stopping washer is provided between the nut and the joining plate .
The second invention is a water-stopping structure at a connection between underground structures, wherein one underground structure has a water-stopping member, one end of a band-shaped flexible joint in the width direction is attached to the other underground structure, the other end of the flexible joint in the width direction is fixed to a joining plate, the joining plate is joined to the one underground structure at a joining surface of the one underground structure facing the other underground structure, the water-stopping member provided on the joining surface is crushed by the joining plate, the one underground structure is a tunnel and the other underground structure is a vertical shaft, an opening is provided in the wall of the vertical shaft which widens in a stepped manner toward the outside of the vertical shaft, the end of the tunnel on the vertical shaft side is inserted into the widened portion on the outside of the opening, and an elastic filler material is placed in the gap between the end of the tunnel on the vertical shaft side and the wall of the widened portion located opposite to the end.

前記接合プレートは、例えば、前記一方の地下構造物の前記接合面に接合される板状の本体と、当該本体から前記他方の地下構造物側に突出する板状の突出部を有するＴ字状の部材であり、前記可撓継手の前記他方の端部が前記突出部に固定される。
この場合、可撓継手が前記一方の地下構造物の断面からはみ出すのを防ぐことができる。 The joining plate is, for example, a T-shaped member having a plate-shaped main body that is joined to the joining surface of one of the underground structures, and a plate-shaped protrusion that protrudes from the main body toward the other underground structure, and the other end of the flexible joint is fixed to the protrusion.
In this case, the flexible joint can be prevented from protruding from the cross section of one of the underground structures.

前記一方の地下構造物は、例えばトンネルであり、前記トンネルは、複数のセグメントを前記トンネルの断面の周方向および前記トンネルの軸方向に接合して構成され、前記セグメントにおいて、他のセグメントとの接合面に止水部材が設けられ、前記接合プレートによって押し潰される止水部材は、前記トンネルの前記他方の地下構造物側の端部のセグメントにおいて、当該他方の地下構造物側に位置する面に設けられた止水部材である。
例えば本発明は、複数のセグメントを接合して構築されたトンネルの端部と、他の地下構造物との間の接続部に用いられる。各セグメントにおいて、他のセグメントとの接合面には止水部材が設けられ、セグメント同士の接合時には止水部材をセグメント間で押し潰す。ただし、トンネルの端部のセグメントにおいて、他の地下構造物側に位置する接合面については、その止水部材を接合プレートにより押し潰す。これにより、止水部材の配置をトンネルの端部のセグメントとその他のセグメントで同一とでき、トンネルの端部のセグメントを特殊な部材とする必要が無くなる。 The one underground structure is, for example, a tunnel, which is constructed by joining a plurality of segments circumferentially around the cross section of the tunnel and in the axial direction of the tunnel, and in which water-stopping members are provided on the joint surfaces of the segments with the other segments, and the water-stopping member that is crushed by the joint plate is a water-stopping member provided on the surface of the segment at the end of the tunnel on the side of the other underground structure, the surface being located on the side of the other underground structure.
For example, the present invention is used in the connection between the end of a tunnel constructed by joining multiple segments and another underground structure. In each segment, a water-stopping member is provided on the joint surface with the other segments, and when the segments are joined, the water-stopping member is crushed between the segments. However, in the joint surface of the segment at the end of the tunnel that is located on the side of the other underground structure, the water-stopping member is crushed by the joining plate. This allows the arrangement of the water-stopping member to be the same in the segment at the end of the tunnel as in the other segments, eliminating the need to use special members for the segment at the end of the tunnel.

本発明によれば、可撓継手による接続部において容易に止水を実現できる止水構造等を提供できる。 The present invention provides a watertight structure that can easily achieve watertightness at connections using flexible joints.

トンネル２と立坑３の接続部を示す図。A diagram showing the connection between tunnel 2 and shaft 3. トンネル２を示す図。A diagram showing tunnel 2. セグメント２２を示す図。A diagram showing segment 22. 止水構造１を示す図。FIG. 止水構造１を示す図。FIG. 止水構造１ａを示す図。FIG.

以下、図面に基づいて本発明の好適な実施形態について詳細に説明する。 The following describes in detail a preferred embodiment of the present invention with reference to the drawings.

（１．トンネル２と立坑３）
図１は、本発明の実施形態に係る止水構造を用いるトンネル２と立坑３との接続部を示す図である。また図２はトンネル２の軸方向の一部を示す斜視図である。 (1. Tunnel 2 and Shaft 3)
Fig. 1 is a diagram showing a connection part between a tunnel 2 using a water stop structure according to an embodiment of the present invention and a vertical shaft 3. Fig. 2 is a perspective view showing a part of the tunnel 2 in the axial direction.

トンネル２（一方の地下構造物）は、複数のセグメント２２をトンネル２の断面の周方向（図２の鎖線ａ参照）やトンネル２の軸方向に接合して構築される地下構造物である。なお、上記のように単に「断面」というときは、トンネル２の軸方向と直交する断面を指すものとする。 Tunnel 2 (one of the underground structures) is an underground structure constructed by joining multiple segments 22 in the circumferential direction of the cross section of tunnel 2 (see dashed line a in Figure 2) or in the axial direction of tunnel 2. Note that when simply referring to a "cross section" as described above, this refers to a cross section perpendicular to the axial direction of tunnel 2.

立坑３（他方の地下構造物）は、地盤に形成した縦穴内に構築される地下構造物である。立坑３は底版３０と壁体３１を有する。底版３０は立坑３の底面上に構築され、壁体３１は立坑３の内壁に沿って底版３０上に構築される。底版３０や壁体３１は主にコンクリートにより形成される。 Shaft 3 (the other underground structure) is an underground structure constructed in a vertical hole formed in the ground. Shaft 3 has a base 30 and a wall 31. Base 30 is constructed on the bottom surface of shaft 3, and wall 31 is constructed on base 30 along the inner wall of shaft 3. Base 30 and wall 31 are mainly made of concrete.

トンネル２と立坑３の接続部では、壁体３１に開口３１１が設けられる。開口３１１は、立坑３の外側に向かって段状に拡幅し、トンネル２の立坑３側の端部は当該開口３１１の外側の拡幅部分に挿入される。 At the connection between the tunnel 2 and the shaft 3, an opening 311 is provided in the wall 31. The opening 311 widens in a stepped manner toward the outside of the shaft 3, and the end of the tunnel 2 on the shaft 3 side is inserted into the widened portion on the outside of the opening 311.

図３（ａ）は、トンネル２を各セグメント２２に分解して示した図である。 Figure 3(a) shows the tunnel 2 broken down into each segment 22.

セグメント２２は例えば鋼製の外殻を有する箱形部材であり、内部は中空となっている。また本実施形態では、セグメント２２がＬ字状の断面を有し、トンネル２の断面が、４つのセグメント２２を角筒状に接合して形成される。さらに、トンネル２は、これらのセグメント２２をトンネル２の軸方向に接合して構成される。なお、トンネル２の断面はこれに限らず、例えばトンネル２の断面が、円弧状の断面を有する複数のセグメント２２を円筒状に接合して形成されてもよい。 The segments 22 are, for example, box-shaped members having a steel outer shell, and are hollow inside. In this embodiment, the segments 22 have an L-shaped cross section, and the cross section of the tunnel 2 is formed by joining four segments 22 into a rectangular tube shape. Furthermore, the tunnel 2 is formed by joining these segments 22 in the axial direction of the tunnel 2. Note that the cross section of the tunnel 2 is not limited to this, and for example, the cross section of the tunnel 2 may be formed by joining multiple segments 22 having arc-shaped cross sections into a cylindrical shape.

セグメント２２において、他のセグメント２２との接合面には止水部材４が設けられる。止水部材４には例えば水膨張性の止水ゴムが用いられるが、これに限らない。 A water-stopping member 4 is provided on the joint surface of the segment 22 with another segment 22. The water-stopping member 4 may be, for example, water-swellable water-stopping rubber, but is not limited to this.

止水部材４は、セグメント２２の４つの接合面に跨るように巻き回される線状部材であり、閉ループを形成するように配置される。各セグメント２２では、このような止水部材４が２条平行に設けられる。 The water-stopping member 4 is a linear member that is wound across the four joint surfaces of the segment 22 and is arranged to form a closed loop. Two such water-stopping members 4 are provided in parallel in each segment 22.

図３（ｂ）の左図に示すように、止水部材４は、セグメント２２の接合面に形成された凹部２２１に配置される。図３（ｂ）の右図に示すように、止水部材４は、隣り合うセグメント２２を接合する際に、これらのセグメント２２の間で圧縮されて押し潰される。 As shown in the left diagram of FIG. 3(b), the water-stopping member 4 is placed in a recess 221 formed in the joining surface of the segments 22. As shown in the right diagram of FIG. 3(b), the water-stopping member 4 is compressed and crushed between the adjacent segments 22 when the segments 22 are joined.

（２．止水構造１）
図４は止水構造１を示す図であり、図１の線Ａ－Ａに沿った断面（トンネル２の軸方向に沿った断面）の斜視図である。 (2. Water Stopping Structure 1)
FIG. 4 is a diagram showing the water stop structure 1, and is a perspective view of a cross section taken along line AA in FIG. 1 (a cross section taken along the axial direction of the tunnel 2).

図４に示すように、止水構造１は、可撓継手５、接合プレート６等を有する。 As shown in FIG. 4, the water-stopping structure 1 has a flexible joint 5, a joining plate 6, etc.

可撓継手５は、トンネル２と立坑３との接続部において、トンネル２の断面の周方向（図２の鎖線ａ参照）に沿って配置される帯状の部材であり、ゴム等の弾性を有する材料で形成される。 The flexible joint 5 is a strip-shaped member that is arranged along the circumferential direction of the cross section of the tunnel 2 (see dashed line a in Figure 2) at the connection between the tunnel 2 and the shaft 3, and is made of an elastic material such as rubber.

可撓継手５は、幅方向の中央部にΩ状の屈曲部５１を有し、幅方向の両端部に板状の固定部５２を有する。固定部５２は、屈曲部５１の両側に連続して一体に形成される。なお可撓継手５の幅方向は、帯状の可撓継手５の短辺方向に対応する。 The flexible joint 5 has an Ω-shaped bent portion 51 in the center in the width direction, and plate-shaped fixed portions 52 at both ends in the width direction. The fixed portions 52 are integrally formed continuously on both sides of the bent portion 51. The width direction of the flexible joint 5 corresponds to the short side direction of the band-shaped flexible joint 5.

可撓継手５の一方の固定部５２は、立坑３の壁体３１の開口３１１に設けられた枠体３２に固定され、これにより可撓継手５の一方の固定部５２が立坑３に取付けられる。枠体３２には鋼材等が用いられ、開口３１１の内面に沿って枠状に配置される。前記したように、開口３１１は立坑３の外側に向かって段状に拡幅するが、枠体３２はこの段部に設けられる。 One fixed part 52 of the flexible joint 5 is fixed to a frame 32 provided in an opening 311 in the wall 31 of the shaft 3, thereby attaching one fixed part 52 of the flexible joint 5 to the shaft 3. The frame 32 is made of steel or the like and is arranged in a frame shape along the inner surface of the opening 311. As described above, the opening 311 widens in a stepped manner toward the outside of the shaft 3, and the frame 32 is provided on this stepped portion.

可撓継手５の他方の固定部５２は、接合プレート６に固定される。接合プレート６は鋼材により形成され、トンネル２の断面の周方向（図２の鎖線ａ参照）に沿って枠状に配置される。この接合プレート６を、上記他方の固定部５２と異なる位置においてトンネル２の立坑３側の端部のセグメント２２に接合することで、可撓継手５の他方の固定部５２が接合プレート６を用いてトンネル２の立坑３側の端部に取付けられる。 The other fixed part 52 of the flexible joint 5 is fixed to the joining plate 6. The joining plate 6 is made of steel and is arranged in a frame shape along the circumferential direction of the cross section of the tunnel 2 (see the chain line a in Figure 2). This joining plate 6 is joined to the segment 22 at the end of the tunnel 2 on the shaft 3 side at a position different from the other fixed part 52, so that the other fixed part 52 of the flexible joint 5 is attached to the end of the tunnel 2 on the shaft 3 side using the joining plate 6.

接合プレート６は、板状の本体６１と、本体６１から突出する板状の突出部６２を有するＴ字状の部材である。本体６１と突出部６２を連結する板状のリブを鎖線ｂで示すように本体６１と突出部６２の隅部に設け、これにより接合プレート６の補強を行うことも可能である。 The joining plate 6 is a T-shaped member having a plate-shaped main body 61 and a plate-shaped protruding portion 62 protruding from the main body 61. Plate-shaped ribs that connect the main body 61 and the protruding portion 62 are provided at the corners of the main body 61 and the protruding portion 62 as shown by the chain line b, which makes it possible to reinforce the joining plate 6.

前記したように、トンネル２のセグメント２２は４つの接合面に跨る止水部材４を有するが、接合プレート６の本体６１は、トンネル２の立坑３側の端部のセグメント２２において、立坑３側に位置する（立坑３側に面した）接合面に沿って配置される。突出部６２は本体６１から立坑３側に突出し、この突出部６２に可撓継手５の他方の固定部５２が固定される。 As described above, the segment 22 of the tunnel 2 has a water-stopping member 4 that spans four joint surfaces, but the main body 61 of the joint plate 6 is arranged along the joint surface located on the shaft 3 side (facing the shaft 3 side) in the segment 22 at the end on the shaft 3 side of the tunnel 2. The protrusion 62 protrudes from the main body 61 toward the shaft 3 side, and the other fixing part 52 of the flexible joint 5 is fixed to this protrusion 62.

トンネル２の立坑３側の端部と立坑３の壁体３１との間の隙間には、弾性を有する間詰材７が配置される。間詰材７には例えば発泡スチロール等が用いられるが、これに限らない。なお図４の符号８、９はそれぞれ防水層と目地材であり、壁体３１の開口３１１の内面からトンネル２側に向かってこの順に設けられる。 An elastic filler 7 is placed in the gap between the end of the tunnel 2 on the shaft 3 side and the wall 31 of the shaft 3. For example, polystyrene foam or the like is used as the filler 7, but it is not limited to this. Note that the reference numerals 8 and 9 in FIG. 4 respectively denote a waterproof layer and a joint material, which are provided in this order from the inner surface of the opening 311 of the wall 31 toward the tunnel 2 side.

図５は、止水構造１について水平方向の断面を示したものである。本実施形態では、立坑３の壁体３１にアンカーボルト３３が埋設されており、アンカーボルト３３の一端が、枠体３２、可撓継手５の一方の固定部５２、および押え板５６の孔（不図示）を通って当該押え板５６から突出する。固定部５２は、アンカーボルト３３の上記突出部分にナット５４を締め込むことで枠体３２に固定される。アンカーボルト３３の他端はＬ字状に折り曲げられて壁体３１のコンクリートに定着される。押え板５６は可撓継手５の長手方向に延びる板材であり、例えば鉄板が用いられる。なお符号５７はナット５４と押え板５６の間に介装されるワッシャーである。 Figure 5 shows a horizontal cross section of the water stop structure 1. In this embodiment, an anchor bolt 33 is embedded in the wall 31 of the shaft 3, and one end of the anchor bolt 33 passes through the frame 32, one fixed part 52 of the flexible joint 5, and a hole (not shown) in the pressing plate 56, and protrudes from the pressing plate 56. The fixing part 52 is fixed to the frame 32 by tightening a nut 54 to the protruding part of the anchor bolt 33. The other end of the anchor bolt 33 is bent into an L-shape and fixed to the concrete of the wall 31. The pressing plate 56 is a plate material extending in the longitudinal direction of the flexible joint 5, and is, for example, a steel plate. The reference numeral 57 denotes a washer interposed between the nut 54 and the pressing plate 56.

また可撓継手５と接合プレート６は、ボルト５３の軸部を接合プレート６の突出部６２、可撓継手５の他方の固定部５２、および押え板５６の孔（不図示）に通し、当該押え板５６から突出する軸部の突出部分にナット５５を締め込むことで固定される。符号５８はナット５５と押え板５６の間に介装されるワッシャーである。 The flexible joint 5 and the connecting plate 6 are fixed by passing the shaft of the bolt 53 through the protruding part 62 of the connecting plate 6, the other fixed part 52 of the flexible joint 5, and a hole (not shown) in the pressing plate 56, and tightening the nut 55 onto the protruding part of the shaft protruding from the pressing plate 56. The reference number 58 is a washer that is interposed between the nut 55 and the pressing plate 56.

また、トンネル２の立坑３側の端部のセグメント２２において、立坑３側に位置する接合面の内側にはボルト２２２が固定され、ボルト２２２の軸部が当該接合面の孔（不図示）から立坑３側に突出している。この軸部を接合プレート６の本体６１の孔（不図示）に通し、本体６１から突出する軸部の突出部分にナット６３を締め込むことで、接合プレート６の本体６１がセグメント２２の上記接合面に接合される。 In addition, in the segment 22 at the end on the shaft 3 side of the tunnel 2, a bolt 222 is fixed to the inside of the joint surface located on the shaft 3 side, and the shaft of the bolt 222 protrudes from a hole (not shown) in the joint surface toward the shaft 3 side. This shaft is passed through a hole (not shown) in the main body 61 of the joint plate 6, and a nut 63 is tightened to the protruding part of the shaft protruding from the main body 61, whereby the main body 61 of the joint plate 6 is joined to the above-mentioned joint surface of the segment 22.

この時、セグメント２２の上記接合面の止水部材４が、接合プレート６の本体６１によって圧縮され、押し潰される。これにより接合プレート６とセグメント２２の間からトンネル２内部に地下水が浸入するのが防止される。またトンネル２と立坑３の間では、可撓継手５等により止水が実現され、地下水の浸入が防止される。 At this time, the water-stopping member 4 on the above-mentioned joint surface of the segment 22 is compressed and crushed by the main body 61 of the joint plate 6. This prevents groundwater from seeping into the tunnel 2 from between the joint plate 6 and the segment 22. In addition, water is stopped between the tunnel 2 and the shaft 3 by flexible joints 5 and the like, preventing groundwater from seeping in.

なお、図５の符号６４はゴム等による止水ワッシャーであり、接合プレート６の本体６１とセグメント２２の上記接合面の孔（ボルト２２２の軸部を通す孔）からセグメント２２内部に地下水が浸入するのを防止する。 In addition, the symbol 64 in Figure 5 denotes a watertight washer made of rubber or the like, which prevents groundwater from entering the inside of the segment 22 through the holes (holes through which the shafts of the bolts 222 pass) in the above-mentioned joint surfaces between the main body 61 of the joint plate 6 and the segment 22.

以上説明したように、本実施形態の止水構造１では、可撓継手５によってトンネル２と立坑３を接続する際に、可撓継手５に接合プレート６を追加的に固定したものを用いる。この接合プレート６により、トンネル２の立坑３側の端部のセグメント２２において、立坑３側の接合面に設けた止水部材４を押し潰す。当該止水部材４を立坑３の壁体３１に押し付けることは難しいが、上記の接合プレート６を用いることにより止水部材４を押し潰し、容易に止水を実現できる。 As described above, in the water-stopping structure 1 of this embodiment, when the tunnel 2 and the shaft 3 are connected by the flexible joint 5, a joint plate 6 is additionally fixed to the flexible joint 5. This joint plate 6 crushes the water-stopping member 4 provided on the joint surface on the shaft 3 side of the segment 22 at the end of the tunnel 2 on the shaft 3 side. It is difficult to press the water-stopping member 4 against the wall 31 of the shaft 3, but by using the above-mentioned joint plate 6, the water-stopping member 4 can be crushed, making it easy to stop water.

また、止水部材４の配置はトンネル２の立坑３側の端部のセグメント２２とそれ以外のセグメント２２とで同一とでき、トンネル２の立坑３側の端部のセグメント２２を特殊な部材とする必要が無く、施工に係る手間やコストが低減される。 In addition, the arrangement of the water-stopping member 4 can be the same for the segment 22 at the end of the tunnel 2 facing the shaft 3 and the other segments 22, so there is no need to use special members for the segment 22 at the end of the tunnel 2 facing the shaft 3, reducing the effort and costs involved in construction.

しかしながら、本発明は以上の実施形態に限定されない。例えば本実施形態ではセグメント２２の接合面に２条の止水部材４が設置されるが、止水部材４は１条だけでもよく、３条以上であってもよい。 However, the present invention is not limited to the above embodiment. For example, in this embodiment, two water-stopping members 4 are installed on the joint surface of the segment 22, but there may be only one water-stopping member 4, or three or more water-stopping members 4.

接合プレート６の形状も、セグメント２２の止水部材４を押し潰せるものであれば特に限定されない。例えば図６の止水構造１ａの接合プレート６ａに示すように、セグメント２２の立坑３側の接合面に沿った本体６１と、本体６１の一端から立坑３側に突出する突出部６２とを有するＬ字状の部材としてもよい。ただし、図５のように接合プレート６をＴ字状とすることで、可撓継手５をトンネル２の内面からセットバックした位置に配置でき、可撓継手５がトンネル２の断面からはみ出すのを防ぐことができる。 The shape of the joining plate 6 is not particularly limited as long as it can crush the water-stopping member 4 of the segment 22. For example, as shown in the joining plate 6a of the water-stopping structure 1a in FIG. 6, it may be an L-shaped member having a main body 61 along the joining surface on the shaft 3 side of the segment 22 and a protruding part 62 protruding from one end of the main body 61 toward the shaft 3 side. However, by making the joining plate 6 T-shaped as shown in FIG. 5, the flexible joint 5 can be positioned at a position set back from the inner surface of the tunnel 2, and the flexible joint 5 can be prevented from protruding from the cross section of the tunnel 2.

また、可撓継手５の形状も特に限定されず、例えば屈曲部５１の形状はΩ状でなくＭ字状や蛇腹状でもよい。また、可撓継手５を立坑３の壁体３１に取付ける取付手段、接合プレート６をセグメント２２に接合する接合手段、可撓継手５と接合プレート６の固定手段も前記したものに限らない。 The shape of the flexible joint 5 is not particularly limited; for example, the shape of the bent portion 51 may be M-shaped or bellows-shaped instead of Ω-shaped. The mounting means for mounting the flexible joint 5 to the wall 31 of the shaft 3, the joining means for joining the joining plate 6 to the segment 22, and the fixing means for the flexible joint 5 and the joining plate 6 are not limited to those described above.

また本実施形態では、鋼製のセグメント２２により構成されたトンネル２とコンクリート製の壁体３１を有する立坑３との接続部に止水構造１を設ける例を説明した。前記したようにトンネル２の断面形状は特に限定されないが、止水構造１の適用対象も特に限定されず、トンネル２や立坑３以外の地下構造物にも適用できる。本発明では、少なくとも、接続対象の一方の地下構造物が、他方の地下構造物側に位置する面に止水部材４を配置したものであればよい。 In this embodiment, an example has been described in which the water-stopping structure 1 is provided at the connection between the tunnel 2 made of steel segments 22 and the shaft 3 having a concrete wall 31. As described above, the cross-sectional shape of the tunnel 2 is not particularly limited, and the application of the water-stopping structure 1 is also not particularly limited, and it can be applied to underground structures other than the tunnel 2 and the shaft 3. In the present invention, it is sufficient that at least one of the underground structures to be connected has a water-stopping member 4 disposed on the surface located on the side of the other underground structure.

また接続対象の両方の地下構造物の上記面に止水部材４が設けられていてもよく、この場合、可撓継手５の両側の固定部５２をそれぞれ接合プレート６に固定し、本実施形態と同様の方法で、これらの接合プレート６により各地下構造物の止水部材４を押し潰せばよい。その他、止水構造１は鋼製の地下構造物同士の接続部に用いることもでき、コンクリート製の地下構造物同士の接続部に用いることもできる。 Water-stopping members 4 may also be provided on the above-mentioned surfaces of both underground structures to be connected. In this case, the fixing parts 52 on both sides of the flexible joint 5 are fixed to the joining plates 6, respectively, and the joining plates 6 are used to crush the water-stopping members 4 of each underground structure in a manner similar to that of this embodiment. In addition, the water-stopping structure 1 can also be used in the connection between steel underground structures, and between concrete underground structures.

以上、添付図面を参照しながら、本発明に係る好適な実施形態について説明したが、本発明はかかる例に限定されない。当業者であれば、本願で開示した技術的思想の範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 The above describes preferred embodiments of the present invention with reference to the attached drawings, but the present invention is not limited to these examples. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally fall within the technical scope of the present invention.

１、１ａ：止水構造
２：トンネル
３：立坑
４：止水部材
５：可撓継手
６、６ａ：接合プレート
７：間詰材
２２：セグメント
３１：壁体
５１：屈曲部
５２：固定部
６１：本体
６２：突出部 Reference Signs List 1, 1a: Water-stopping structure 2: Tunnel 3: Shaft 4: Water-stopping member 5: Flexible joint 6, 6a: Joint plate 7: Filling material 22: Segment 31: Wall body 51: Bending portion 52: Fixing portion 61: Main body 62: Protruding portion

Claims (3)

地下構造物同士の接続部における止水構造であって、
一方の地下構造物は箱型部材から構成され、止水部材を有し、
帯状の可撓継手の幅方向の一方の端部が他方の地下構造物に取付けられ、
前記可撓継手の幅方向の他方の端部が接合プレートに固定され、
前記接合プレートが、前記箱型部材の前記他方の地下構造物側に面した接合面において、前記箱型部材と接合され、当該接合面に設けられた前記止水部材が、前記接合プレートにより押し潰され、
前記箱型部材と前記接合プレートは、前記接合面の内側に固定されて前記接合面の孔から突出するボルトを前記接合プレートの孔に通し、前記接合プレートから突出する前記ボルトの突出部分にナットを締め込むことで接合され、
前記ナットと前記接合プレートの間に止水ワッシャーが設けられたことを特徴とする止水構造。 A water-stopping structure at a connection between underground structures,
One underground structure is made of box-shaped members and has waterproofing members.
One end of the belt-shaped flexible joint in the width direction is attached to the other underground structure,
The other end of the flexible joint in the width direction is fixed to a joining plate,
The joining plate is joined to the box-shaped member at a joining surface facing the other underground structure side of the box-shaped member , and the water-stopping member provided on the joining surface is crushed by the joining plate ,
The box-shaped member and the joining plate are joined by passing a bolt fixed to the inside of the joining surface and protruding from a hole in the joining surface through a hole in the joining plate, and tightening a nut onto a protruding portion of the bolt protruding from the joining plate,
A water-stopping structure characterized in that a water-stopping washer is provided between the nut and the joining plate . 地下構造物同士の接続部における止水構造であって、
一方の地下構造物は止水部材を有し、
帯状の可撓継手の幅方向の一方の端部が他方の地下構造物に取付けられ、
前記可撓継手の幅方向の他方の端部が接合プレートに固定され、
前記接合プレートが、前記一方の地下構造物の前記他方の地下構造物側に面した接合面において、前記一方の地下構造物と接合され、当該接合面に設けられた前記止水部材が、前記接合プレートにより押し潰され、
前記一方の地下構造物がトンネル、前記他方の地下構造物が立坑であり、
前記立坑の壁体に、前記立坑の外側に向かって段状に拡幅する開口が設けられ、前記トンネルの前記立坑側の端部が、前記開口の外側の拡幅部分に挿入され、
前記トンネルの前記立坑側の端部と、当該端部と対向する位置にある前記拡幅部分の壁体との間の隙間には、弾性を有する間詰材が配置されることを特徴とする止水構造。 A water-stopping structure at a connection between underground structures,
One of the underground structures has a water-stopping member,
One end of the belt-shaped flexible joint in the width direction is attached to the other underground structure,
The other end of the flexible joint in the width direction is fixed to a joining plate,
The joining plate is joined to one of the underground structures at a joining surface of the one of the underground structures facing the other underground structure, and the water-stopping member provided on the joining surface is crushed by the joining plate ,
The one underground structure is a tunnel and the other underground structure is a shaft;
An opening is provided in the wall of the shaft, the opening being stepped toward the outside of the shaft, and the end of the tunnel on the shaft side is inserted into the widened portion on the outside of the opening;
A water-stopping structure characterized in that an elastic filler is placed in the gap between the end of the tunnel on the shaft side and the wall of the widened portion located opposite said end . 前記接合プレートは、前記一方の地下構造物の前記接合面に接合される板状の本体と、当該本体から前記他方の地下構造物側に突出する板状の突出部を有するＴ字状の部材であり、
前記可撓継手の前記他方の端部が前記突出部に固定されたことを特徴とする請求項１または請求項２記載の止水構造。 The joining plate is a T-shaped member having a plate-shaped main body joined to the joining surface of the one underground structure and a plate-shaped protruding portion protruding from the main body toward the other underground structure,
3. The waterproof structure according to claim 1, wherein the other end of the flexible joint is fixed to the protruding portion.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004346592A (en) 2003-05-22 2004-12-09 Seibu Polymer Corp Cut-off structure of joint part frame body in underground structure
JP2012149461A (en) 2011-01-20 2012-08-09 Sumitomo Rubber Ind Ltd Joint structure
US20160053614A1 (en) 2014-03-21 2016-02-25 Herrenknecht Ag Protective element, concrete element, and method for producing a concrete element
JP2019157620A (en) 2018-03-13 2019-09-19 日本製鉄株式会社 Manufacturing method for composite segment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004346592A (en) 2003-05-22 2004-12-09 Seibu Polymer Corp Cut-off structure of joint part frame body in underground structure
JP2012149461A (en) 2011-01-20 2012-08-09 Sumitomo Rubber Ind Ltd Joint structure
US20160053614A1 (en) 2014-03-21 2016-02-25 Herrenknecht Ag Protective element, concrete element, and method for producing a concrete element
JP2019157620A (en) 2018-03-13 2019-09-19 日本製鉄株式会社 Manufacturing method for composite segment

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