JP2018135717A - Arch segment and segment assembly including the same - Google Patents
Arch segment and segment assembly including the same Download PDFInfo
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- JP2018135717A JP2018135717A JP2017031863A JP2017031863A JP2018135717A JP 2018135717 A JP2018135717 A JP 2018135717A JP 2017031863 A JP2017031863 A JP 2017031863A JP 2017031863 A JP2017031863 A JP 2017031863A JP 2018135717 A JP2018135717 A JP 2018135717A
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Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
本発明は、アーチ用セグメント及びこれを備えたセグメントアセンブリに関する。 The present invention relates to an arch segment and a segment assembly including the arch segment.
従来より、地下鉄や道路、共同溝、並びに、下水道等のトンネル工事として、シールド掘削機を利用した、シールド工法が広く採用されている。一般的に、このシールド工法は、まず、開切工法によって、発進立坑を形成し、この発進立坑から地下にシールド掘削機を運び込む。そして、発進立坑の壁体をシールド掘削機で掘削して、横方向に発進し、目的地点までトンネルを掘削する。なお、通常、このようなシールド工法においては、トンネルの目的地点や、この目的地点に辿り着くまでの中間地点に、発進立坑と同様の到達立坑が形成され、その到達立坑にシールド掘削機を到達させる。 Conventionally, a shield construction method using a shield excavator has been widely adopted as tunnel construction for subways, roads, common grooves, and sewers. Generally, in this shield method, first, a start shaft is formed by an open-cut method, and a shield excavator is carried underground from this start shaft. Then, the wall of the starting pit is excavated with a shield excavator and started laterally to excavate the tunnel to the destination point. Normally, in such a shield construction method, an arrival shaft similar to the start shaft is formed at the tunnel destination point or an intermediate point until the destination point is reached, and the shield excavator reaches the arrival shaft. Let
ところで、開切工法によって形成された発進立坑や到達立坑（以下、双方をまとめて立坑ともいう）は、作業時における安全性確保等の観点から、壁体が補強される。すなわち、立坑の壁体には、土圧や水圧（以下、土圧等という）による崩壊や、地下水流出を防止するため、鉄筋コンクリートや、溝矢板、あるいはＨ型鋼等を用いた土留め壁が構築されたり、周辺地盤の地盤改良等の対策も講じられる。 By the way, the start-up shaft and the reaching shaft (hereinafter, both are collectively referred to as a shaft) formed by the open-cut method are reinforced with a wall body from the viewpoint of ensuring safety during operation. In other words, earth retaining walls using reinforced concrete, grooved sheet piles, H-shaped steel, etc. are constructed in the wall of the shaft to prevent collapse due to earth pressure or water pressure (hereinafter referred to as earth pressure) and groundwater outflow. Measures such as ground improvement of the surrounding ground are also taken.
ところが、シールド工法においては、安全性等の観点から設けた土留め壁ではあるが、トンネル掘削のために、地盤改良の後に土留め壁を撤去したり、あるいは土留め壁に対してシールド掘削機を通過させるための開口を形成する（所謂鏡切り）。そして、これらの作業は、立坑という限られた領域内で行う必要があるため、従来より、人力での作業を要し、作業時の安全性への不安、並びに、工期の長期化や施工費の増大等を招く要因となっていた。そのため、シールド工法を用いたトンネル工事では、立坑における、作業効率の向上及び安全性の向上が望まれている。 However, in the shield method, it is a retaining wall provided from the viewpoint of safety, etc., but for tunnel excavation, the retaining wall is removed after ground improvement or a shield excavator against the retaining wall. An opening for allowing the light to pass therethrough is formed (so-called mirror cutting). And since these operations need to be performed within a limited area of a shaft, it has been necessary to work manually, and there has been anxiety about safety at the time of work, as well as a longer construction period and construction costs. It was a factor causing an increase in Therefore, in tunnel construction using the shield method, it is desired to improve work efficiency and safety in the shaft.
そこで、近年においては、立坑の土留め壁に、樹脂材料により構成された部材（以下、単に樹脂部材という）を組み込み、この部材が組み込まれた部分をシールド掘削機で直接的に切削し、発進・到達するシールド工法、つまりＳＥＷ工法（Shield Earth Retaining Wall System）が行われている。例えば、特許文献１には、その技術が開示されている。なお、樹脂部材としては、例えば、ポリウレタン発泡樹脂成形体（ＦＦＵ：Fiber reinforced Foamed Urethane）を用いることができる。 Therefore, in recent years, a member made of a resin material (hereinafter simply referred to as a resin member) is incorporated in the earth retaining wall of the shaft, and the part in which this member is incorporated is directly cut with a shield excavator to start・ Achieving shield method, that is, SEW method (Shield Earth Retaining Wall System) is being carried out. For example, Patent Document 1 discloses the technique. In addition, as a resin member, a polyurethane foamed resin molded object (FFU: Fiber reinforced foamed urethane) can be used, for example.
ところで、立坑が円形状である場合、土留め壁は曲面状になるため、ＳＥＷ工法を採用するには、上述した樹脂部材を円弧状に形成する場合がある。しかしながら、立坑が大型である場合には、円弧状の樹脂部材を搬入することが難しく、また樹脂部材を円弧状に形成することは容易ではなかった。なお、このような問題は、円形状の立坑に限られず、曲面状の壁体を樹脂部材で形成する場合全般に起こり得る問題である。本発明は、上記問題を解決するためになされたものであり、切削可能な曲面状の壁体を容易に形成することが可能なアーチ用セグメント及びこれを備えたセグメントアセンブリを提供することを目的とする。 By the way, when the vertical shaft is circular, the retaining wall has a curved surface. Therefore, in order to employ the SEW method, the above-described resin member may be formed in an arc shape. However, when the shaft is large, it is difficult to carry in the arc-shaped resin member, and it is not easy to form the resin member in the arc shape. Such a problem is not limited to a circular shaft, and is a problem that can occur in general when a curved wall is formed of a resin member. The present invention has been made to solve the above problems, and an object of the present invention is to provide an arch segment capable of easily forming a cutable curved wall and a segment assembly including the arch segment. And
本発明は、円形状の壁体の少なくとも一部を構成し、シールド掘削機により切削される部位を組立てるためのアーチ用セグメントであって、樹脂材料により板状に形成された複数の第１板状部材と、樹脂材料により板状に形成された複数の第２板状部材と、を備え、前記第１板状部材は、長手方向の両端部に、それぞれ第１端部及び第２端部を有し、短手方向の両端部に、それぞれ第１側部及び第２側部を有し、前記第２板状部材は、長手方向の両端部に、それぞれ第１端部及び第２端部を有し、短手方向の両端部に、それぞれ第１側部及び第２側部を有し、前記複数の第１板状部材と前記複数の第２板状部材とは、それぞれ、前記第１端部側が接触するように、交互に積層されており、前記複数の第１板状部材と複数の第２板状部材とは、前記第１側部側が凸となるように、鈍角に交差するように積層され、前記複数の第１板状部材及び前記複数の第２部材は、それぞれ、前記第２端部側において、積層方向に隙間を開けて配置され、櫛状の接続部を形成している。 The present invention is an arch segment for assembling a portion to be cut by a shield excavator, which constitutes at least a part of a circular wall body, and a plurality of first plates formed into a plate shape from a resin material And a plurality of second plate members formed in a plate shape by a resin material, and the first plate member has a first end and a second end at both ends in the longitudinal direction, respectively. Each having a first side and a second side at both ends in the short-side direction, and the second plate-like member has a first end and a second end at both ends in the longitudinal direction, respectively. Each of the plurality of first plate-like members and the plurality of second plate-like members, respectively. The plurality of first plate members and the plurality of second plate members are stacked alternately so that the first end side contacts. The first side members and the plurality of second members are stacked so as to intersect with an obtuse angle so that the first side portion is convex, and the plurality of first plate members and the plurality of second members are respectively stacked in the second end portion side. Are arranged with a gap between them to form a comb-like connecting portion.
上記アーチ状セグメントにおいては、前記第１板状部材の第１端部の第１側部と、前記第２板状部材の第２端部の第１側部とが一致するように、前記第１板状部材の第１端部は、積層方向から見て、鋭角をなすように形成され、前記第２板状部材の第１端部の第１側部と、前記第１板状部材の第２端部の第１側部とが一致するように、前記第２板状部材の第１端部は、積層方向から見て、鋭角をなすように形成することができる。 In the arch-shaped segment, the first side of the first end of the first plate-like member and the first side of the second end of the second plate-like member coincide with each other. The first end portion of the one plate-like member is formed so as to form an acute angle when viewed from the stacking direction, and the first side portion of the first end portion of the second plate-like member and the first plate-like member The first end of the second plate-like member can be formed to form an acute angle when viewed from the stacking direction so that the first side of the second end matches the first side.
上記各アーチ状セグメントにおいては、前記各第１板状部材の第１端部と面方向に隣接し、当該各第１板状部材とともに、前記第２板状部材上に積層される第３板状部材をさらに備えることができ、前記第３板状部材は、前記各第１板状部材の第１端部の第２側部に接する第１側辺と、当該第３板状部材が積層される前記第２板状部材の前記第２側部に沿って延びる第２側辺と、を有する三角形状に形成することができる。 In each said arch-shaped segment, the 3rd board laminated | stacked on the said 2nd plate-shaped member with the said 1st plate-shaped member adjacent to the 1st edge part of each said 1st plate-shaped member in the surface direction. The third plate-like member is laminated with a first side that contacts the second side of the first end of each first plate-like member and the third plate-like member. And a second side extending along the second side portion of the second plate-shaped member.
上記各アーチ状セグメントにおいては、前記各第２板状部材の第１端部と面方向に隣接し、当該各第２板状部材とともに、前記第１板状部材上に積層される第４板状部材をさらに備えることができ、前記第４板状部材は、前記各第２板状部材の第１端部の第２側部に接する第１側辺と、当該第４板状部材が積層される前記第１板状部材の前記第１側部に沿って延びる第２側辺と、を有する三角形状に形成することができる。 In each said arch-shaped segment, the 4th board laminated | stacked on the said 1st plate-shaped member with the said 2nd plate-shaped member adjacent to the 1st edge part of each said 2nd plate-shaped member and a surface direction. The fourth plate-like member may be provided with a first side that contacts the second side of the first end of each of the second plate-like members, and the fourth plate-like member is laminated. And a second side extending along the first side portion of the first plate-like member.
上記各アーチ状セグメントにおいては、前記第１板状部材及び第２板状部材は、複数の板材を積層することで構成することができる。 In each of the arched segments, the first plate member and the second plate member can be configured by laminating a plurality of plate materials.
上記各アーチ状セグメントにおいては、前記第１板状部材及び第２板状部材は、接着剤により固定することができる。 In each of the arched segments, the first plate member and the second plate member can be fixed with an adhesive.
本発明に係る第１のセグメントアセンブリは、上述したいずれかのアーチ用セグメントと、前記アーチ用セグメントの少なくとも一方の接続部に接続される、直線用セグメントと、を備え、前記直線用セグメントは、複数の第５板状部材が積層されることで形成され、前記直線用セグメントの端部には、前記第５板状部材が互いにずれながら積層されることで櫛状の接続部が形成され、当該櫛状の接続部が、前記アーチ用セグメントの接続部と噛み合うことで接続されている。 A first segment assembly according to the present invention includes any one of the above-described arch segments and a straight segment connected to at least one connection portion of the arch segment, and the straight segment includes: Formed by laminating a plurality of fifth plate-like members, and at the end of the linear segment, a comb-like connection portion is formed by laminating the fifth plate-like members while being displaced from each other, The comb-like connection portions are connected by meshing with the connection portions of the arch segment.
本発明に係る第２のセグメントアセンブリは、上述したいずれかの複数のアーチ用セグメントを備え、前記複数のアーチ用セグメントの接続部同士を噛み合わせることで接続し、アーチ状に形成されている。 A second segment assembly according to the present invention includes any one of the plurality of arch segments described above, and is connected to each other by meshing connection portions of the plurality of arch segments, and is formed in an arch shape.
上記各セグメントアセンブリにおいては、噛み合わされた前記接続部を、前記積層方向に貫通する少なくとも１つの固定具をさらに備えることができる。 Each of the segment assemblies may further include at least one fixture that penetrates the connected connection portion in the stacking direction.
本発明によれば、切削可能な曲面状の壁体を容易に形成することが可能となる。 According to the present invention, it is possible to easily form a curved wall that can be cut.
以下、本発明に係るアーチ用セグメント及びこれを用いたセグメントアセンブリを、ＳＥＷ工法（Shield Earth Retaining Wall System）が行われる立坑に適用した一実施形態について、図面を参照しつつ説明する。 Hereinafter, an embodiment in which an arch segment according to the present invention and a segment assembly using the arch segment are applied to a shaft in which an SEW method (Shield Earth Retaining Wall System) is performed will be described with reference to the drawings.
図１は立坑の概略断面図である。図１に示すように、本実施形態が対象とする立坑は円形状に形成され、その壁体である土留め壁１００の一部は、ＳＥＷ工法を適用するために、シールド掘削機２００で切削可能な切削可能領域３００を有している。図１は、発進立坑を示しているが、到達立坑にも適用できることはいうまでもない。 FIG. 1 is a schematic sectional view of a shaft. As shown in FIG. 1, the vertical shaft targeted by this embodiment is formed in a circular shape, and a part of the retaining wall 100 that is the wall body is cut by a shield excavator 200 in order to apply the SEW method. It has a possible cutable area 300. Although FIG. 1 shows the starting shaft, it is needless to say that it can also be applied to a reaching shaft.
立坑の土留め壁１００は、主として、鉄筋コンクリート等で形成されているが、その一部の断面円弧状の領域が、切削可能領域３００として、アーチ状のセグメントアセンブリを積層することで構成されている。以下、このセグメントアセンブリについて、詳細に説明する。 The earth retaining wall 100 of the shaft is mainly formed of reinforced concrete or the like, and a partial arc-shaped region of the cross section is configured by stacking arched segment assemblies as the cutable region 300. . Hereinafter, this segment assembly will be described in detail.
＜１．セグメントアセンブリ＞
図２はセグメントアセンブリの斜視図である。図２に示すように、本実施形態に係るセグメントアセンブリは、平面視Ｖ字状に形成されたアーチ用セグメント１０と、このアーチ用セグメント１０の両端にそれぞれ接続される一対の直線用セグメント２０と、を備え、全体としてアーチ状に形成されている。そして、このセグメントアセンブリが立坑１００の上下方向に複数積層されることで、上記切削可能領域３００を構成する。以下、各セグメントについて詳細に説明する。
<1. Segment assembly>
FIG. 2 is a perspective view of the segment assembly. As shown in FIG. 2, the segment assembly according to the present embodiment includes an arch segment 10 formed in a V shape in plan view, and a pair of straight segments 20 respectively connected to both ends of the arch segment 10. Are formed in an arch shape as a whole. A plurality of segment assemblies are stacked in the vertical direction of the shaft 100 to constitute the cuttable region 300. Hereinafter, each segment will be described in detail.
＜１−１．アーチ用セグメント＞
図３はアーチ用セグメントの斜視図である。図３に示すように、アーチ用セグメント１０は、第１板状部材１と第２板状部材２とを交互に積層することで構成されている。本実施形態では、３枚の第１板状部材１と、３枚の第２板状部材２とが交互に積層されている。これに加え、３枚の第３板状部材３及び３枚の第４板状部材４が設けられている。以下、各部材について説明する。
<1-1. Arch segment>
FIG. 3 is a perspective view of the arch segment. As shown in FIG. 3, the arch segment 10 is configured by alternately laminating the first plate member 1 and the second plate member 2. In the present embodiment, three first plate-like members 1 and three second plate-like members 2 are alternately stacked. In addition, three third plate-like members 3 and three fourth plate-like members 4 are provided. Hereinafter, each member will be described.
＜１−１−１．第１板状部材＞
図４は第１板状部材の平面図である。図４に示すように、第１板状部材１は、平行に延びる第１側縁１１と第２側縁１２、第１側縁１１の一端部から鈍角をなすように斜めに傾斜して延び、第２側縁１２の一端部に連結される傾斜縁１３、第１側縁１１と第２側縁１２の他端部同士を連結する端縁１４により囲まれた形状を有している。上記形状において、第１側縁１１は第２側縁１２よりも短く、第１側縁１１と傾斜縁１３とは鋭角をなすように連結されており、この部分を第１端部１０１と称することとする。一方、第１側縁１１及び第２側縁１２と端縁１４とは直交しており、この端縁１４を含む部分を第２端部１０２と称することとする。したがって、第１板状部材１の長手方向の両端部が、第１端部１０１及び第２端部１０２を構成する。また、第１板状部材１の短手方向において、第１側縁１１側の端部を第１側部、第２側縁１２側を第２側部と称することがある。さらに、第１側縁１１と傾斜縁１３との連結部分を鈍角部１０３と称することとする。
<1-1-1. First plate member>
FIG. 4 is a plan view of the first plate member. As shown in FIG. 4, the first plate-like member 1 extends obliquely at an obtuse angle from one end of the first side edge 11, the second side edge 12, and the first side edge 11 that extend in parallel. In addition, it has a shape surrounded by an inclined edge 13 connected to one end of the second side edge 12 and an end edge 14 connecting the other ends of the first side edge 11 and the second side edge 12. In the above shape, the first side edge 11 is shorter than the second side edge 12, and the first side edge 11 and the inclined edge 13 are connected so as to form an acute angle, and this portion is referred to as a first end 101. I will do it. On the other hand, the first side edge 11 and the second side edge 12 and the end edge 14 are orthogonal to each other, and a portion including the end edge 14 is referred to as a second end portion 102. Accordingly, both end portions in the longitudinal direction of the first plate-like member 1 constitute the first end portion 101 and the second end portion 102. Moreover, in the short direction of the 1st plate-shaped member 1, the edge part by the side of the 1st side edge 11 may be called a 1st side part, and the 2nd side edge 12 side may be called a 2nd side part. Further, a connecting portion between the first side edge 11 and the inclined edge 13 is referred to as an obtuse angle portion 103.
＜１−１−２．第２板状部材＞
図５は第２板状部材の平面図である。図５に示すように、第２板状部材２も、第１板状部材１と同様に形成されている。第２板状部材２は、平行に延びる第１側縁２１と第２側縁２２、第１側縁２１の一端部から鈍角をなすように斜めに傾斜して延び、第２側縁２２の一端部に連結される傾斜縁２３、第１側縁２１と第２側縁２２の他端部同士を連結する端縁により囲まれた形状を有している。上記形状において、第１側縁２１は第２側縁２２よりも短く、第１側縁２１と傾斜縁２３とは鋭角をなすように連結されており、この部分を第１端部２０１と称することとする。一方、第１側縁２１及び第２側縁２２と端縁２４とは直交しており、この端縁２４を含む部分を第２端部２０２と称することとする。したがって、第２板状部材２の長手方向の両端部が、第１端部２０１及び第２端部２０２を構成する。また、第２板状部材２の短手方向において、第１側縁２１側の端部を第１側部、第２側縁２２側を第２側部と称することがある。さらに、第１側縁２１と傾斜縁２３との連結部分を鈍角部２０３と称することがある。
<1-1-2. Second plate member>
FIG. 5 is a plan view of the second plate member. As shown in FIG. 5, the second plate member 2 is also formed in the same manner as the first plate member 1. The second plate-like member 2 extends obliquely at an obtuse angle from one end of the first side edge 21, the second side edge 22, and the first side edge 21 extending in parallel. It has a shape surrounded by an inclined edge 23 connected to one end, and an end edge connecting the other ends of the first side edge 21 and the second side edge 22. In the above shape, the first side edge 21 is shorter than the second side edge 22, and the first side edge 21 and the inclined edge 23 are connected so as to form an acute angle, and this portion is referred to as a first end 201. I will do it. On the other hand, the first side edge 21 and the second side edge 22 and the end edge 24 are orthogonal to each other, and a portion including the end edge 24 is referred to as a second end portion 202. Therefore, both ends in the longitudinal direction of the second plate-like member 2 constitute the first end 201 and the second end 202. Moreover, in the short direction of the 2nd plate-shaped member 2, the edge part by the side of the 1st side 21 may be called a 1st side part, and the 2nd side edge 22 side may be called a 2nd side part. Furthermore, the connection part of the 1st side edge 21 and the inclination edge 23 may be called the obtuse angle part 203. FIG.
＜１−１−３．第３板状部材＞
図６は第３板状部材の平面図である。図６に示すように、第３板状部材３は、平面視において、直角三角形状に形成されており、傾斜縁３１と、この傾斜縁３１の端部に連結される側縁３２と、この側縁３２と直交し、側縁３２と傾斜縁３１とを連結する端縁３３と、で囲まれている。また、図７に示すように、第３板状部材３は、アーチ用セグメント１０の中では、第１板状部材１と同一面を構成するように、第１板状部材１に隣接して配置される。そして、第１板状部材１と同じ厚さに形成されている。
<1-1-3. Third plate member>
FIG. 6 is a plan view of the third plate member. As shown in FIG. 6, the third plate-like member 3 is formed in a right triangle shape in plan view, and includes an inclined edge 31, a side edge 32 connected to the end of the inclined edge 31, and this It is surrounded by an edge 33 that is orthogonal to the side edge 32 and connects the side edge 32 and the inclined edge 31. Further, as shown in FIG. 7, the third plate member 3 is adjacent to the first plate member 1 so as to form the same surface as the first plate member 1 in the arch segment 10. Be placed. And it is formed in the same thickness as the 1st plate-shaped member 1.
＜１−１−４．第４板状部材＞
図８は第４板状部材の平面図である。図８に示すように、第４板状部材４は、平面視において、直角三角形状に形成されており、傾斜縁４１と、この傾斜縁４１の端部に連結される側縁４２と、この側縁４２と直交し、側縁４２と傾斜縁４１とを連結する端縁４３と、で囲まれた形状を有している。また、図９に示すように、第４板状部材４は、アーチ用セグメント１０の中では、第２板状部材２と同一面を構成するように、第２板状部材２に隣接して配置される。そして、第２板状部材２と同じ厚さに形成されている。
<1-1-4. Fourth plate member>
FIG. 8 is a plan view of the fourth plate member. As shown in FIG. 8, the fourth plate-like member 4 is formed in a right triangle shape in plan view, and includes an inclined edge 41, a side edge 42 connected to the end of the inclined edge 41, and this It has a shape surrounded by an end edge 43 that is orthogonal to the side edge 42 and connects the side edge 42 and the inclined edge 41. Further, as shown in FIG. 9, the fourth plate member 4 is adjacent to the second plate member 2 so as to form the same surface as the second plate member 2 in the arch segment 10. Be placed. And it is formed in the same thickness as the 2nd plate-shaped member 2.
＜１−１−５．アーチ用セグメントの積層構造＞
以上のように構成された第１〜第４板状部材１〜４は、次のように積層される。すなわち、図３に示すように、第１板状部材１及び第２板状部材２の第１端部１０１，２０１側同士が接するように固定されている。より詳細に説明すると、第１板状部材１の鈍角部１０３と、第２板状部材２の鈍角部２０３とが一致するように積層される。すなわち、第１板状部材１の傾斜縁１３が、第２板状部材２の第１側縁１１と一致し、第２板状部材２の傾斜縁２３が、第１板状部材１の第１側縁１１と一致するように、第１板状部材１と第２板状部材２とが交互に積層される。こうして、第１板状部材１と第２板状部材２は鈍角をなすように交差する。
<1-1-5. Laminated structure of arch segments>
The 1st-4th plate-shaped members 1-4 comprised as mentioned above are laminated | stacked as follows. That is, as shown in FIG. 3, the first plate member 1 and the second plate member 2 are fixed so that the first end portions 101 and 201 side thereof are in contact with each other. If it demonstrates in detail, it will laminate | stack so that the obtuse angle part 103 of the 1st plate-shaped member 1 and the obtuse angle part 203 of the 2nd plate-shaped member 2 may correspond. That is, the inclined edge 13 of the first plate-like member 1 coincides with the first side edge 11 of the second plate-like member 2, and the inclined edge 23 of the second plate-like member 2 is the first edge of the first plate-like member 1. The first plate-like member 1 and the second plate-like member 2 are alternately laminated so as to coincide with the one side edge 11. Thus, the first plate member 1 and the second plate member 2 intersect so as to form an obtuse angle.
また、図７に示すように、第３板状部材３は、各第１板状部材１に隣接するよう配置され、第２板状部材２上に積層される。このように第３板状部材３が配置されることで、第２板状部材２の第２端部２０２と、第３板状部材３の端縁３３との間に段差が形成される。 In addition, as shown in FIG. 7, the third plate-like member 3 is disposed adjacent to each first plate-like member 1 and is laminated on the second plate-like member 2. By arranging the third plate-like member 3 in this way, a step is formed between the second end portion 202 of the second plate-like member 2 and the edge 33 of the third plate-like member 3.
同様に、図９に示すように、第４板状部材４は、各第２板状部材２に隣接するように配置され、第１板状部材１上に積層される。このように第４板状部材４が配置されることで、第１板状部材１の第２端部１０２と、第４板状部材４の端縁４３との間に段差が形成される。 Similarly, as shown in FIG. 9, the fourth plate member 4 is disposed adjacent to each second plate member 2 and laminated on the first plate member 1. By arranging the fourth plate-like member 4 in this way, a step is formed between the second end portion 102 of the first plate-like member 1 and the edge 43 of the fourth plate-like member 4.
このように積層される第１〜第４板状部材１〜４は、例えば、エポキシ系などの接着剤により固定される。また、第１板状部材１と第２板状部材２とが交互に積層されていることから、第１板状部材１及び第２板状部材２の第２端部１０２，２０２は、それぞれ、積層方向に隙間を開けて配置される。これにより、アーチ用セグメント１０の長手方向の両端部は、側面視において、櫛状に形成され、これが直線用セグメントと接続される接続部１０５を構成する。 The 1st-4th plate-shaped members 1-4 laminated | stacked in this way are fixed by adhesives, such as an epoxy type, for example. Moreover, since the 1st plate-shaped member 1 and the 2nd plate-shaped member 2 are laminated | stacked alternately, the 2nd edge part 102,202 of the 1st plate-shaped member 1 and the 2nd plate-shaped member 2 is respectively These are arranged with a gap in the stacking direction. Thereby, both ends in the longitudinal direction of the arch segment 10 are formed in a comb shape in a side view, and this constitutes a connecting portion 105 connected to the straight segment.
＜１−２．直線用セグメント＞
一対の直線用セグメント２０は、アーチ用セグメント１０の各接続部１０５にそれぞれ接続されるものであり、同様の構成を有している。したがって、以下では、一方の直線用セグメント２０についてのみ説明する。図１０は直線用セグメントの斜視図である。図１０に示すように、直線用セグメント２０は、長方形状の直線用第１板状部材（第５板状部材）６と、直線用第２板状部材（第６板状部材）７と、を積層させたものである。直線用第１板状部材６は、直線用第２板状部材７よりも長手方向の長さが長く形成されている。ここでは、長手方向の両端部を第１端部６０１，７０１、及び第２端部６０２，７０２と称することとする。そして、本実施形態では、第１端部６０１，７０１を揃えるように、３枚の直線用第１板状部材６と３枚の直線用第２板状部材７とを交互に積層している。これにより、直線用第１板状部材６の第２端部６０２は、隙間を開けて配置され、側面視において、櫛状に形成される。これが接続部２０５を構成し、アーチ用セグメント１０の接続部１０５と接続される。なお、直線用セグメント２０は、上記のように一端部を櫛状に形成しているが、両端部を櫛状に形成することもできる。
<1-2. Straight line segment>
The pair of straight line segments 20 are respectively connected to the connection portions 105 of the arch segment 10 and have the same configuration. Accordingly, only one straight line segment 20 will be described below. FIG. 10 is a perspective view of a straight segment. As shown in FIG. 10, the straight line segment 20 includes a rectangular straight first plate member (fifth plate member) 6, straight second plate member (sixth plate member) 7, and Are laminated. The straight first plate member 6 is formed to have a longer length in the longitudinal direction than the straight second plate member 7. Here, both end portions in the longitudinal direction are referred to as first end portions 601 and 701 and second end portions 602 and 702. In the present embodiment, the three straight first plate members 6 and the three straight second plate members 7 are alternately stacked so that the first end portions 601 and 701 are aligned. . Thereby, the 2nd end part 602 of the 1st plate-shaped member 6 for straight lines is arrange | positioned with a clearance gap, and is formed in a comb shape in side view. This constitutes the connection portion 205 and is connected to the connection portion 105 of the arch segment 10. In addition, as for the segment 20 for straight lines, although the one end part is formed in the comb shape as mentioned above, both ends can also be formed in a comb shape.
＜１−３．アーチ用セグメント及び直線用セグメントを構成する材料＞
次に、上記各セグメントを構成する材料、つまり各板状部材１〜７を構成する材料について説明する。各板状部材１〜７は、繊維を含有する発泡樹脂材料で形成された発泡成形体とすることができる。
<1-3. Materials constituting arch segment and straight segment>
Next, the material which comprises each said segment, ie, the material which comprises each plate-shaped member 1-7 is demonstrated. Each plate-like member 1-7 can be made into the foaming molding formed with the foaming resin material containing a fiber.
各板状部材１〜７には一方向に延びる多数の繊維が含有されている。本実施形態では、各板状部材１〜７の長手方向と繊維の延びる方向とが概ね一致するようにしている。この繊維とは、連続した長い繊維状物を指し、例えば、ガラス繊維、炭素繊維、ポリアミド繊維、ポリエステル繊維、ポリオレフィン繊維、ポリイミド繊維、セルロース繊維などがあげられる。なかでも耐熱性、コストの面でガラス繊維が好ましい。 Each plate-like member 1 to 7 contains a large number of fibers extending in one direction. In this embodiment, the longitudinal direction of each plate-like member 1-7 and the direction where a fiber extends are made to correspond in general. This fiber refers to a continuous long fibrous material, and examples thereof include glass fiber, carbon fiber, polyamide fiber, polyester fiber, polyolefin fiber, polyimide fiber, and cellulose fiber. Of these, glass fiber is preferable in terms of heat resistance and cost.
上記繊維の形状は特には限定されないが、ロービング、ロービングクロス、マット、ストランドマット、不織布などがあげられる。中でも生産性の面で、ロービングが好ましい。 The shape of the fiber is not particularly limited, and examples thereof include roving, roving cloth, mat, strand mat, and non-woven fabric. Of these, roving is preferable in terms of productivity.
上記繊維の量も特には限定されないが、少なすぎると、得られる発泡成形体に剛性の低下や、ばらつきを生じ、多すぎると繊維束全体に発泡性樹脂液を均一に含浸することができない。したがって、剛性のばらつきが生じないように、樹脂材料１００重量部に対して２０〜１５０重量部が好ましい。 The amount of the fiber is not particularly limited. However, if the amount is too small, the resulting foamed molded article has a decrease in rigidity or variation. If the amount is too large, the entire fiber bundle cannot be uniformly impregnated with the foamable resin liquid. Therefore, 20 to 150 parts by weight is preferable with respect to 100 parts by weight of the resin material so that variations in rigidity do not occur.
繊維の直径も特には限定されないが、細すぎると含浸の際に繊維が切断されてしまい、太すぎると繊維の表面積が減少して、発泡性樹脂液との密着力が減少して得られる補強部材の強度が低下するので２〜１００μｍが好ましい。 The diameter of the fiber is not particularly limited, but if it is too thin, the fiber will be cut during impregnation, and if it is too thick, the surface area of the fiber will decrease, resulting in a reduction in adhesion to the foamable resin liquid. Since the intensity | strength of a member falls, 2-100 micrometers is preferable.
また、樹脂材料としては、例えば、水などの発泡剤を含む発泡性樹脂液を発泡、硬化させたものを用いることができる。このような発泡性樹脂液としては、例えば、ポリウレタン樹脂，フェノール樹脂，ポリエステル樹脂等が好適に用いられる。また、発泡性樹脂液は固形充填剤を含むことができる。固形充填剤とは、短繊維状ないし粉末状の充填剤を意味し、たとえば、ガラス繊維，アスベスト繊維，鉱物繊維等の無機質短繊維状物、木綿，麻等の天然繊維、レーヨン等の再生繊維、ポリアミド，ポリエステル，ポリオレフィンなどの合成繊維等の有機質短繊維状物、炭酸カルシウム，タルク，クレー，硅砂，シラスバルーン，軽石などの無機質粉粒体、および木粉，竹粉，澱粉，米ぬかなどの有機質粉状物、あるいはこれらの混合物、あるいは、長繊維補強発泡成形体の切削屑などが挙げられる。以上のような発泡樹脂材料の代表的なものとしては、ガラス長繊維強化プラスチック発泡体（Fiber reinforced Foamed Urethane: FFU)がある。 Moreover, as a resin material, what foamed and hardened the foamable resin liquid containing foaming agents, such as water, can be used, for example. As such a foamable resin liquid, for example, a polyurethane resin, a phenol resin, a polyester resin, or the like is preferably used. Moreover, the foamable resin liquid can contain a solid filler. A solid filler means a filler in the form of short fibers or powders, for example, inorganic short fibers such as glass fibers, asbestos fibers and mineral fibers, natural fibers such as cotton and hemp, and regenerated fibers such as rayon. Organic fiber such as synthetic fibers such as polyamide, polyester and polyolefin, inorganic powder such as calcium carbonate, talc, clay, cinnabar, shirasu balloon, pumice, and wood powder, bamboo powder, starch, rice bran, etc. Examples thereof include organic powders, mixtures thereof, or cutting waste of long fiber reinforced foamed molded products. A typical example of such a foamed resin material is a long glass fiber reinforced plastic foam (FFU).
＜１−４．アーチ用セグメントと直線用セグメントの組立＞
図１１に示すように、上記のようにアーチ用セグメント１０の接続部１０５、及び各直線用セグメント２０の接続部２０５は、ともに櫛状に形成されているため、これらを互いに噛み合わせることで接続される。このとき、接続部１０５，２０５にウレタン系などの接着剤を塗布した上で、噛み合わせる。そして、図１２に示すように、噛み合わせられた接続部１０５，２０５を積層方向に貫通するように、複数のボルト８を取り付ける。これにより、接着剤が乾燥するまでの間、アーチ用セグメント１０の接続部１０５と、各直線用セグメント２０の接続部２０５とが固定される（仮止め）。ボルト８は、種々の材料で形成できるが、例えば、ＦＲＰ製のボルト８を採用することができる。また、ボルト８以外また、ボルト８に加えて、例えば、ＦＲＰ製のテープを巻き付けることで、接続部１０５，２０５の仮止めを行うことができる。
<1-4. Assembly of arch segment and straight segment>
As shown in FIG. 11, since the connection part 105 of the arch segment 10 and the connection part 205 of each straight line segment 20 are formed in a comb shape as described above, they are connected by meshing them with each other. Is done. At this time, an adhesive such as urethane is applied to the connecting portions 105 and 205 and then engaged. And as shown in FIG. 12, the some volt | bolt 8 is attached so that the connected connection parts 105 and 205 may be penetrated in the lamination direction. Thereby, until the adhesive is dried, the connecting portion 105 of the arch segment 10 and the connecting portion 205 of each straight segment 20 are fixed (temporarily fixed). The bolt 8 can be formed of various materials, and for example, a bolt 8 made of FRP can be adopted. Further, in addition to the bolt 8, in addition to the bolt 8, for example, by winding a tape made of FRP, the connection portions 105 and 205 can be temporarily fixed.
こうして、図２に示すように、アーチ状のセグメントアセンブリが形成され、これを複数積層することで、立坑１００の切削可能領域３００の一部を構成することができる。 In this way, as shown in FIG. 2, an arch-shaped segment assembly is formed, and by stacking a plurality of these, a part of the cutable region 300 of the shaft 100 can be configured.
＜２．特徴＞
上記実施形態によれば、以下の効果を得ることができる。
（１）本実施形態に係るアーチ用セグメント１０は、第１及び第２板状部材１，２を鈍角に交差するように積層することで、角部を形成するとともに、その両端部に櫛形の接続部１０５を形成している。そのため、このアーチ用セグメント１０を直線用セグメント２０と組み合わせることで、アーチ状のセグメントアセンブリを形成することができる。したがって、これを積層することで、円弧状の切削可能領域３００を形成することができる。すなわち、本実施形態によれば、円弧状の壁体を形成するために、例えば、工場などで各アセンブリ１０，２０を作製し、これを立坑１００において組立てることで、切削可能領域３００でも容易に作製することができる。特に、接続部１０５，２０５を櫛形にしているため、組立が簡単である。以上より、大型の立坑１００であっても、これに対応した切削可能領域３００を容易に作製することができる。
<2. Features>
According to the above embodiment, the following effects can be obtained.
(1) The arch segment 10 according to the present embodiment is formed by laminating the first and second plate-like members 1 and 2 so as to intersect with an obtuse angle, thereby forming a corner portion and comb-like shapes at both ends thereof. A connecting portion 105 is formed. Therefore, an arch-shaped segment assembly can be formed by combining the arch segment 10 with the straight segment 20. Therefore, the arcuate cutable region 300 can be formed by laminating them. That is, according to the present embodiment, in order to form the arc-shaped wall body, for example, the assemblies 10 and 20 are manufactured at a factory or the like, and assembled in the shaft 100, so that it can be easily performed in the cuttable region 300. Can be produced. In particular, since the connecting portions 105 and 205 are comb-shaped, assembly is easy. As mentioned above, even if it is a large shaft 100, the cutting possible area | region 300 corresponding to this can be produced easily.
（２）円弧状の壁体を作製するにあたって、直線状の板材を組み合わせることでアーチ状のセグメントアセンブリを作製することができるため、板材を曲げて円弧状の壁体を作製するよりも簡易に壁体を作製することができる。 (2) Since an arcuate segment assembly can be produced by combining linear plate materials when producing an arcuate wall body, it is easier than bending the plate material to produce an arcuate wall body. A wall can be produced.
（３）各板状部材１〜４は、ＦＦＵの繊維方向に剪断破壊することがあるが、本実施形態においては、第１及び第２板状部材１，２が交差するように積層しているため、剪断破壊が生じるのを抑制することができる。 (3) Although each plate-like member 1-4 may be sheared and broken in the fiber direction of the FFU, in this embodiment, the first and second plate-like members 1 and 2 are laminated so as to intersect. Therefore, the occurrence of shear fracture can be suppressed.
（４）図１３に示すように、壁体の外部から土圧、水圧等が作用したときには、第１板状部材１に作用する力を第３板状部材３の傾斜縁３１によって、受け止めることができるため、曲げに強い構造とすることができる。同様に、第２板状部材２に作用する力は、第４板状部材の傾斜縁４１により受け止められる。 (4) As shown in FIG. 13, when earth pressure, water pressure or the like is applied from the outside of the wall body, the force acting on the first plate member 1 is received by the inclined edge 31 of the third plate member 3. Therefore, it is possible to make the structure strong against bending. Similarly, the force acting on the second plate member 2 is received by the inclined edge 41 of the fourth plate member.
＜３．変形例＞
以上、本発明の一実施形態について説明したが、本発明はこれに限定されるものではなく、その趣旨を逸脱しない限りにおいて種々の変更が可能である。なお、以下の変形例は、適宜組み合わせ可能である。
<3. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible unless it deviates from the meaning. The following modifications can be combined as appropriate.
＜３−１＞
上記実施形態では、アーチ用セグメント１０と直線用セグメント２０を組み合わせているが、例えば、図１４に示すように、アーチ用セグメント１０を複数組み合わせることで、セグメントアセンブリを構成することができる。これにより、より曲面に沿った切削可能領域３００を作製することができる。
<3-1>
In the above embodiment, the arch segment 10 and the straight segment 20 are combined. However, as shown in FIG. 14, for example, a segment assembly can be configured by combining a plurality of arch segments 10. Thereby, the cuttable area 300 along the curved surface can be produced.
＜３−２＞
本発明に係るアーチ用セグメントは、少なくとも第１板状部材１と第２板状部材２とを鈍角に交差させて積層させれば、作製することができる。したがって、必ずしも第１板状部材１と第２板状部材２の第１端部１０１，２０１を鋭角に形成しなくてもよく、適当な形状にすればよい。また、第３及び第４板状部材３，４を用いなくてもよく、あるいは第３及び第４板状部材３，４を別部材にせず、第１及び第２板状部材１，２それぞれと、一体形成してもよい。
<3-2>
The arch segment according to the present invention can be manufactured by laminating at least the first plate member 1 and the second plate member 2 at an obtuse angle. Therefore, the first end portions 101 and 201 of the first plate-like member 1 and the second plate-like member 2 do not necessarily have to be formed at an acute angle, and may be formed in an appropriate shape. Further, the third and fourth plate-like members 3 and 4 may not be used, or the third and fourth plate-like members 3 and 4 are not made separate members, and the first and second plate-like members 1 and 2, respectively. And may be integrally formed.
＜３−３＞
各板状部材１〜４は、一枚の板材で形成してもよいし、複数の板材を積層することで形成することもできる。
<3-3>
Each of the plate-like members 1 to 4 may be formed by a single plate material, or may be formed by laminating a plurality of plate materials.
＜３−４＞
上記実施形態では、セグメントアセンブリをＳＥＷ工法に用いたが、例えば、シールド掘削機により切削することが予定される種々の壁体を作製するのに用いることができる。
<3-4>
In the above embodiment, the segment assembly is used in the SEW method. However, the segment assembly can be used, for example, to produce various wall bodies that are scheduled to be cut by a shield excavator.
１ 第１板状部材
２ 第２板状部材
３ 第３板状部材
４ 第４板状部材
１０ アーチ用セグメント
２０ 直線用セグメント
DESCRIPTION OF SYMBOLS 1 1st plate member 2 2nd plate member 3 3rd plate member 4 4th plate member 10 Arch segment 20 Straight line segment
Claims (9)
樹脂材料により板状に形成された複数の第１板状部材と、
樹脂材料により板状に形成された複数の第２板状部材と、
を備え、
前記第１板状部材は、長手方向の両端部に、それぞれ第１端部及び第２端部を有し、短手方向の両端部に、それぞれ第１側部及び第２側部を有し、
前記第２板状部材は、長手方向の両端部に、それぞれ第１端部及び第２端部を有し、短手方向の両端部に、それぞれ第１側部及び第２側部を有し、
前記複数の第１板状部材と前記複数の第２板状部材とは、それぞれ、前記第１端部側が接触するように、交互に積層されており、
前記複数の第１板状部材と複数の第２板状部材とは、前記第１側部側が凸となるように、鈍角に交差するように積層され、
前記複数の第１板状部材及び前記複数の第２部材は、それぞれ、前記第２端部側において、積層方向に隙間を開けて配置され、櫛状の接続部を形成している、アーチ用セグメント。 An arch segment for assembling a portion that forms at least a part of a circular wall and is cut by a shield excavator,
A plurality of first plate-like members formed in a plate shape from a resin material;
A plurality of second plate-like members formed in a plate shape from a resin material;
With
The first plate-like member has a first end and a second end at both ends in the longitudinal direction, and a first side and a second side at both ends in the short direction. ,
The second plate-like member has a first end and a second end at both ends in the longitudinal direction, and a first side and a second side at both ends in the short direction. ,
The plurality of first plate-like members and the plurality of second plate-like members are alternately stacked such that the first end side contacts each other,
The plurality of first plate-like members and the plurality of second plate-like members are laminated so as to intersect an obtuse angle so that the first side portion side is convex,
The plurality of first plate-like members and the plurality of second members are each arranged on the second end side with a gap in the stacking direction to form a comb-like connection portion. segment.
前記第２板状部材の第１端部の第１側部と、前記第１板状部材の第２端部の第１側部とが一致するように、前記第２板状部材の第１端部は、積層方向から見て、鋭角をなすように形成されている、請求項１に記載のアーチ用セグメント。 The first side of the first plate-like member is aligned with the first side of the first end of the first plate-like member and the first side of the second end of the second plate-like member. The end is formed to form an acute angle when viewed from the stacking direction,
The first side of the second plate member is aligned with the first side of the first end of the second plate member and the first side of the second end of the first plate member. The arch segment according to claim 1, wherein the end portion is formed so as to form an acute angle when viewed from the stacking direction.
前記第３板状部材は、
前記各第１板状部材の第１端部の第２側部に接する第１側辺と、
当該第３板状部材が積層される前記第２板状部材の前記第２側部に沿って延びる第２側辺と、
を有する三角形状に形成されている、請求項１または２に記載のアーチ用セグメント。 A third plate-like member that is adjacent to the first end of each first plate-like member in the surface direction and is laminated on the second plate-like member together with the first plate-like member;
The third plate-shaped member is
A first side contacting the second side of the first end of each first plate-like member;
A second side extending along the second side of the second plate-like member on which the third plate-like member is laminated;
The arch segment according to claim 1, wherein the arch segment is formed in a triangular shape having the shape.
前記第４板状部材は、
前記各第２板状部材の第１端部の第２側部に接する第１側辺と、
当該第４板状部材が積層される前記第１板状部材の前記第１側部に沿って延びる第２側辺と、
を有する三角形状に形成されている、請求項１から３のいずれかに記載のアーチ用セグメント。 A fourth plate member that is adjacent to the first end of each of the second plate members in the surface direction and is laminated on the first plate member together with the second plate members;
The fourth plate member is
A first side contacting the second side of the first end of each second plate-like member;
A second side extending along the first side of the first plate member on which the fourth plate member is laminated;
The arch segment according to any one of claims 1 to 3, wherein the arch segment is formed in a triangular shape having the shape.
前記アーチ用セグメントの少なくとも一方の接続部に接続される、直線用セグメントと、
を備え、
前記直線用セグメントは、複数の第５板状部材が積層されることで形成され、
前記直線用セグメントの端部には、前記第５板状部材が互いにずれながら積層されることで櫛状の接続部が形成され、
当該櫛状の接続部が、前記アーチ用セグメントの接続部と噛み合うことで接続されている、セグメントアセンブリ。 An arch segment according to any of claims 1 to 6;
A straight segment connected to at least one connection of the arch segment;
With
The straight segment is formed by laminating a plurality of fifth plate members,
At the end of the straight line segment, the fifth plate-like members are stacked while being displaced from each other to form a comb-like connection portion,
A segment assembly in which the comb-like connecting portions are connected by meshing with the connecting portions of the arch segment.
前記複数のアーチ用セグメントの接続部同士を噛み合わせることで接続し、アーチ状に形成されている、
セグメントアセンブリ。 A plurality of arch segments according to any one of claims 1 to 6,
Connected by engaging the connecting portions of the plurality of arch segments, formed in an arch shape,
Segment assembly.
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| JP7463244B2 (en) | 2020-09-18 | 2024-04-08 | 積水化学工業株式会社 | Earth retaining wall |
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