JP2020100938A - Frame structure of earth retaining wall - Google Patents

Frame structure of earth retaining wall Download PDF

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JP2020100938A
JP2020100938A JP2018237564A JP2018237564A JP2020100938A JP 2020100938 A JP2020100938 A JP 2020100938A JP 2018237564 A JP2018237564 A JP 2018237564A JP 2018237564 A JP2018237564 A JP 2018237564A JP 2020100938 A JP2020100938 A JP 2020100938A
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beam member
single beam
retaining wall
overlapped
frame structure
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渡辺　正弘
Masahiro Watanabe
正弘 渡辺
義雄 石井
Yoshio Ishii
義雄 石井
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Marubeni Construction Mat Lease Co Ltd
Marubeni Construction Material Lease Co Ltd
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Marubeni Construction Mat Lease Co Ltd
Marubeni Construction Material Lease Co Ltd
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Abstract

To allow efficient framing work of an earth retaining wall.SOLUTION: A waling material 12 horizontally arranged on an inner face of an earth retaining wall is formed of a single beam material 14 and overlap beam materials 15 arranged on both end parts of the beam material. A cover plate 31 is arranged astride an outer side face of an end part of the single beam material 14 and an outer side face of an end part of the overlap beam material 15, and the single beam material 14 and the overlap beam material 15 are connected by the cover plate 31. A horizontal brace receiving piece 33 is arranged astride an inner side face of the end part of the single beam material 14 and an inner side face of the end part of the overlap beam material 15, and the single beam material 14 and the overlap beam material 15 are fastened by the horizontal brace receiving piece 33. A horizontal brace 36 is fastened between the adjacent horizontal brace receiving pieces 33.SELECTED DRAWING: Figure 1

Description

本発明は、腹起材と、隣り合う腹起材との間に架設される火打材とを有し、山留壁を支持する山留壁の架構構造に関する。 TECHNICAL FIELD The present invention relates to a frame structure of a mountain retaining wall that has an uprising material and a fired material that is installed between adjacent abutment materials and supports the retaining wall.

地面を掘削したときに掘削部の周囲の側面から周囲地盤が崩壊するのを防止するために、山留壁が周囲の側面に設けられる。平面四角形に地下を掘削したときには、四角形の掘削側面の内面に山留壁が配置される。山留壁を保持するために、山留壁の内側には、土留支保工材としての腹起材が水平方向に配置され、隣り合う山留壁の内側に配置されて直角方向に突き当てられる２つの腹起材の間には火打材が架設される。 In order to prevent the surrounding ground from collapsing from the side surface around the excavated portion when the ground is excavated, a retaining wall is provided on the peripheral side surface. When excavating underground in a plane quadrangle, a mountain retaining wall is arranged on the inner surface of the quadrangular excavation side. In order to hold the mountain retaining wall, inside the mountain retaining wall, the upholstery material as the earth retaining material is arranged horizontally, and is arranged inside the adjacent mountain retaining walls and abutted at right angles. A flint material is installed between the two upholstery materials.

特許文献１には、腹起材と、隣り合う腹起材との間に架設される火打材とを有する山留壁の架構構造が記載されている。 Patent Document 1 describes a frame structure of a mountain retaining wall having an upholstery material and a fired material installed between adjacent upholstery materials.

上記文献に記載された従来の架構構造における腹起材は、中央単体梁とこれの両端部に配置される端部重合梁とを接続することにより形成されている。中央単体梁は単一のＨ形鋼により形成され、端部重合梁は幅寸法がそれぞれ中央単体梁の２分の１の内側梁と外側梁とを幅方向に接続して形成される。 The upholstery member in the conventional frame structure described in the above-mentioned document is formed by connecting the central unitary beam and the end overlap beams arranged at both ends thereof. The central unitary beam is formed of a single H-shaped steel, and the end overlap beam is formed by connecting the inner beam and the outer beam, each having a width dimension of ½ of the central unitary beam, in the width direction.

土圧負担が大きい中央単体梁は、高強度鋼つまり高張力鋼により形成され、土圧負担が小さい端部重合梁の内側梁と外側梁は、それぞれ一般構造用圧延鋼材により形成されており、中央単体梁は端部重合梁よりも高強度である。 The central single beam with a large earth pressure load is formed of high-strength steel, that is, high-tensile steel, and the inner beam and outer beam of the end overlapped beams with a small earth pressure load are each formed of general structural rolled steel, The central single beam has higher strength than the end overlap beam.

特開２０１４−１５９７７１号公報JP, 2014-159771, A

中央単体梁の両端部に設けられたエンドプレートと、端部重合梁の端部に設けられたエンドプレートは突き当てられた状態で複数本のボルトにより接続される。さらに、中央単体梁と端部重合梁とを跨ぐようにして両方の端部の内側側面と外側側面とにはカバープレートが突き当てられてボルトにより締結される。 The end plates provided at both ends of the central unitary beam and the end plates provided at the ends of the end overlap beam are connected to each other by a plurality of bolts in an abutted state. Further, a cover plate is abutted against the inner side surface and the outer side surface of both ends so as to straddle the central single beam and the end overlap beam, and is fastened by a bolt.

中央単体梁の端部には、火打受けピースがボルトにより締結されており、隣り合う腹起材との間に架設される火打材は、隣り合う中央単体梁の火打受けピースの間に取り付けられる。 The fire hitting piece is fastened to the end of the central single beam by bolts, and the fire hitting material installed between adjacent bellows is attached between the fire hitting pieces of the adjacent central single beam. ..

従来のように、中央単体梁と端部重合梁とを内側側面に取り付けられるカバープレートと、外側側面に取り付けられるカバープレートとにより連結するようにした架構構造においては、隣り合う腹起材の間に架設される火打材はカバープレートを避けて、中央単体梁の端部に接続する必要がある。このため、中央単体梁と端部複合梁と接続部には、内側側面と外側側面とに２枚のカバープレートを突き当ててそれぞれをボルトで締結しなければならず、山留壁の架構構造の構築作業に時間がかかり、施工性が悪いという課題がある。 In the frame structure in which the central single beam and the end overlap beam are connected by the cover plate attached to the inner side surface and the cover plate attached to the outer side surface as in the conventional art, the space between the adjacent upright members is increased. It is necessary to avoid the cover plate and connect the fired material to be installed on the end of the central single beam. For this reason, it is necessary to abut two cover plates on the inner side surface and the outer side surface of the central single beam, the end composite beam, and the connection portion, and fasten them with bolts. However, there is a problem in that construction work takes time and workability is poor.

本発明は、山留壁の架設工事の施工性を向上し工期短縮を図ることを目的とする。 An object of the present invention is to improve the workability of erection work for mountain retaining walls and shorten the construction period.

上記課題を解決するため、請求項１に記載の本発明の山留壁の架構構造は、山留壁の内面に水平方向に配置される腹起材と、隣り合う前記腹起材の間に架設される火打材とを備えた山留壁の架構構造であって、形鋼からなる単一梁材と、当該単一梁材よりも幅寸法が小型の複数の形鋼からなり前記単一梁材の両端部に配置される重合梁材とにより前記腹起材を形成し、前記単一梁材の端部の外側面と前記重合梁材の端部の外側面とに跨がって配置されるカバープレートにより前記単一梁材と前記重合梁材とを締結し、前記単一梁材の端部の内側面と前記重合梁材の端部の内側面とに跨がって配置される火打受けピースにより前記単一梁材と前記重合梁材とを締結し、前記火打受けピースに前記火打材を締結することを特徴とする。 In order to solve the above-mentioned subject, the frame structure of the mountain retaining wall according to the present invention according to claim 1 is provided between the uprising members horizontally arranged on the inner surface of the mountain retaining wall and the adjacent uprising members. A frame structure of a mountain retaining wall with a fired material to be erected, wherein the single beam member is made of shaped steel and a plurality of shaped steel members having a width dimension smaller than that of the single beam member are used. Forming the uprising member with the overlapping beam members arranged at both ends of the beam member, straddling the outer surface of the end portion of the single beam member and the outer surface of the end portion of the overlapping beam member. The single beam member and the overlapped beam member are fastened to each other by a cover plate that is arranged, and the cover member is arranged across the inner side surface of the end portion of the single beam member and the inner side surface of the end portion of the overlapped beam member. The single beam material and the overlapped beam material are fastened together by a fired piece, and the fired material is fastened to the fired piece.

請求項２に記載の本発明の山留壁の架構構造は、上記請求項１記載の発明において、前記単一梁材に、前記火打受けピースの端部に位置させてスティフナープレートを設けたことを特徴とする。 According to the frame structure of the mountain retaining wall of the present invention as set forth in claim 2, in the invention as set forth in claim 1, the single beam member is provided with a stiffener plate located at an end of the struck piece. Is characterized by.

請求項３に記載の本発明の山留壁の架構構造は、上記請求項１または２記載の発明において、前記火打受けピースに押し付け力を加えるジャッキを前記火打材に設けたことを特徴とする。 According to a third aspect of the present invention, in the frame structure of the mountain retaining wall according to the first aspect or the second aspect, a jack for applying a pressing force to the hitting piece is provided in the hitting material. ..

本発明によれば、単一梁材とその両端部に配置される重合梁材とを連結するために、それぞれの端部の外側面にはカバープレートが締結され、それぞれの端部の内側面には火打受けピースが締結される。火打受けピースには火打材が取り付けられる。火打材を取り付けるための火打受けピースが単一梁材と重合梁材とを締結するために利用されるので、火打受けピースとは別に、単一梁材と重合梁材との端部の内側面にカバープレートを取り付けることが不要となる。これにより、山留壁の架設工事の施工性を向上することができ、工期を短縮することができ、架設工事の経済性を向上させることができる。火打材が単一梁材と重合梁材との接続部に火打受けピースを介して取り付けられるので、接続部の強度を火打材が高めることができる。 According to the present invention, the cover plate is fastened to the outer surface of each end to connect the single beam and the overlapped beam arranged at both ends thereof, and the inner surface of each end is connected. A fire hitting piece is fastened to. A hitting material is attached to the hitting piece. Since the hitting piece for attaching the hitting material is used to fasten the single beam and the overlapped beam, separately from the hitting piece, the end of the single beam and the overlapped beam is separated. It becomes unnecessary to attach a cover plate to the side surface. As a result, it is possible to improve the workability of the erection work for the mountain retaining wall, shorten the construction period, and improve the economical efficiency of the erection work. Since the hitting material is attached to the connection portion between the single beam material and the overlapped beam material via the hitting piece, the strength of the connection portion can be increased by the hitting material.

火打受けピースの端部に位置させてスティフナープレートを単一梁材に設けることにより、山留壁からスティフナープレートを介して火打材に土圧が加わることになり、単一梁材の強度を高めることができる。火打材にジャッキを設けると、火打受けピースに加えられる押し付け力を調整することができ、土圧に応じて最適な保持力を火打材に加えることができる。 By placing the stiffener plate on the single beam at the end of the hitting piece, earth pressure will be applied to the fired material from the retaining wall through the stiffener plate, and the strength of the single beam will be increased. be able to. When a jack is provided on the fired material, the pressing force applied to the fired piece can be adjusted, and an optimum holding force can be applied to the fired material according to the earth pressure.

本発明の一実施の形態である山留壁の架構構造を示す平面図である。It is a top view showing a frame structure of a mountain retaining wall which is one embodiment of the present invention. （Ａ）は図１に示された単一梁材の一部省略平面図であり、（Ｂ）は（Ａ）の正面図であり、（Ｃ）は図２におけるＡ−Ａ線断面図であり、（Ｄ）は（Ａ）の右側面図である。(A) is a partially omitted plan view of the single beam member shown in FIG. 1, (B) is a front view of (A), and (C) is a sectional view taken along the line AA in FIG. 2. Yes, (D) is a right side view of (A). 単一梁材の端面に接続された重合梁材を示す平面図である。It is a top view which shows the overlapped beam material connected to the end surface of a single beam material. 単一梁材の端部と重合梁材の端部とを示す斜視図である。It is a perspective view which shows the edge part of a single beam material, and the edge part of an overlapping beam material. 単一梁材と重合梁材の接続部を示す斜視図である。It is a perspective view which shows the connection part of a single beam material and an overlapping beam material. 図１におけるＢ部拡大平面図である。It is a B section enlarged plan view in FIG. 他の実施の形態である山留壁の架構構造を示す一部省略平面図である。It is a partially abbreviated top view which shows the frame structure of the mountain retaining wall which is other embodiment. さらに他の実施の形態である山留壁の架構構造を示す一部省略平面図である。It is a partially omitted top view which shows the frame structure of the mountain retaining wall which is another embodiment. さらに他の実施の形態である山留壁の架構構造を示す一部省略平面図である。It is a partially omitted top view which shows the frame structure of the mountain retaining wall which is another embodiment.

以下、本発明の一例としての実施の形態について、図面に基づいて詳細に説明する。なお、実施の形態を説明するための図面において、同一の構成要素には原則として同一の符号を付し、その繰り返しの説明は省略する。 Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. In addition, in the drawings for describing the embodiments, the same components are denoted by the same reference symbols in principle, and repeated description thereof will be omitted.

（第１の実施の形態） (First embodiment)

図１においては、地下に四角形の掘削部１０が掘削され、その周囲の側面に山留壁１１ａ〜１１ｄが配置されている。それぞれの山留壁１１ａ〜１１ｄは多数の鋼矢板により形成されており、それぞれの鋼矢板は周囲の側面に沿って垂直に打設され、隣り合う鋼矢板は側面で接続されている。ただし、山留壁は鋼矢板のみならず、他の部材によって形成することもできる。 In FIG. 1, a rectangular excavation portion 10 is excavated underground, and mountain retaining walls 11a to 11d are arranged on the side surfaces around the excavation portion 10. Each mountain retaining wall 11a-11d is formed of a large number of steel sheet piles, each steel sheet pile is vertically driven along the peripheral side surface, and adjacent steel sheet piles are connected by the side surface. However, the retaining wall can be formed not only by the steel sheet pile but also by other members.

山留壁１１ａ、１１ｂの内面には水平方向に腹起材１２が配置され、腹起材１２の両端面は山留壁１１ｃ、１１ｄに当接している。山留壁１１ｃ、１１ｄの内面には水平方向に腹起材１３が配置され、腹起材１３の両端面は腹起材１２の端部に当接している。このように、同一平面内に４本の腹起材１２、１３が山留壁１１ａ〜１１ｄの内面側に位置させて配置されている。 The upholstery material 12 is horizontally arranged on the inner surfaces of the mountain retaining walls 11a and 11b, and both end surfaces of the uprising material 12 are in contact with the mountain retaining walls 11c and 11d. The upholstery material 13 is horizontally arranged on the inner surfaces of the mountain retaining walls 11c and 11d, and both end surfaces of the upholstery material 13 are in contact with the ends of the upholstery material 12. In this way, the four uprising members 12 and 13 are arranged on the inner surface side of the mountain retaining walls 11a to 11d in the same plane.

それぞれの腹起材１２、１３は、単一梁材１４とその両端部に配置される重合梁材１５とからなる。単一梁材１４は、高強度鋼つまり高張力鋼のＨ形鋼材からなり、図２に示されるように、幅寸法Ｈで、高さ寸法Ｂの単一のＨ形鋼材により構成され、ウェブ１４ａとこれと一体となったフランジ１４ｂとを有している。Ｈ形鋼材としては、例えば、通常のＳＳ４００（一般構造用圧延鋼材）よりも降伏点の高いＳＭ４９０Ｙ（溶接構造用圧延鋼材）の材質であって、Ｈ７００×３５０×１６×３６のように大きなサイズのＨ形鋼材が使用される。これにより、山留Ｈ５００型２本相当の強度が得られる。単一梁材１４の両端面にはエンドプレート１６が溶接されており、エンドプレート１６には複数のボルト取付孔１７が形成されている。 Each of the uprising members 12, 13 is composed of a single beam member 14 and overlapping beam members 15 arranged at both ends thereof. The single beam member 14 is made of H-shaped steel material of high strength steel, that is, high-strength steel, and is composed of a single H-shaped steel material having a width dimension H and a height dimension B as shown in FIG. It has 14a and the flange 14b integrated with this. The H-shaped steel material is, for example, a material of SM490Y (rolled steel material for welded structure) having a higher yield point than that of ordinary SS400 (rolled steel material for general structure), and a large size such as H700×350×16×36. H-shaped steel material is used. As a result, the strength equivalent to two Yamadome H500 types can be obtained. End plates 16 are welded to both end faces of the single beam member 14, and a plurality of bolt mounting holes 17 are formed in the end plate 16.

ウェブ１４ａの両面には三角形のリブプレート１８が溶接され、それぞれのリブプレート１８はエンドプレート１６に溶接されており、リブプレート１８によりエンドプレート１６と単一梁材１４との取付強度が高められている。さらに、ウェブ１４ａの両面には四辺形のスティフナープレート１９が、単一梁材１４の両端部側に位置させて溶接され、それぞれのスティフナープレート１９はフランジ１４ｂに溶接されており、単一梁材１４の端部強度が高められている。 Triangular rib plates 18 are welded to both sides of the web 14a, and each rib plate 18 is welded to the end plate 16. The rib plates 18 enhance the attachment strength between the end plate 16 and the single beam member 14. ing. Further, quadrilateral stiffener plates 19 are welded to both sides of the web 14a while being positioned at both end sides of the single beam member 14, and each stiffener plate 19 is welded to the flange 14b. The edge strength of 14 is increased.

図３は単一梁材１４の端面に接続された重合梁材１５を示す平面図である。重合梁材１５は長い寸法の第１の重合梁材部２１ａとこれに接続される短い寸法の第２の重合梁材部２１ｂとを接続することにより形成されている。それぞれの重合梁材部２１ａ、２１ｂは、外側梁材２２と内側梁材２３とを接続することにより形成されている。外側梁材２２と内側梁材２３は、ウェブ１５ａとこれと一体となったフランジ１５ｂとを有し、それぞれ一般構造用圧延鋼材のＨ形鋼材からなり、単一梁材１４よりも低強度の鋼材である。 FIG. 3 is a plan view showing the overlapped beam member 15 connected to the end surface of the single beam member 14. The overlapped beam member 15 is formed by connecting a long overlapped first overlapped beam member portion 21a and a short overlapped second overlapped beam member portion 21b. Each of the overlapped beam members 21a and 21b is formed by connecting the outer beam member 22 and the inner beam member 23. The outer beam member 22 and the inner beam member 23 have a web 15a and a flange 15b which is integral with the web 15a, each of which is made of an H-shaped steel member of rolled steel for general structure and has a lower strength than the single beam member 14. It is a steel material.

外側梁材２２と内側梁材２３の幅寸法ｈは単一梁材１４の幅寸法Ｈの２分の１であり、高さ寸法は単一梁材１４の高さ寸法Ｂと同一である。したがって、重合梁材１５の幅寸法は、単一梁材１４の幅寸法と同一である。重合梁材１５は複数の梁材を幅方向に接続することにより形成されているが、３つのＨ形鋼材からなる梁材を接続することにより、重合梁材１５を形成するようにしても良い。 The width dimension h of the outer beam member 22 and the inner beam member 23 is half the width dimension H of the single beam member 14, and the height dimension is the same as the height dimension B of the single beam member 14. Therefore, the width dimension of the overlapped beam member 15 is the same as the width dimension of the single beam member 14. The overlapped beam member 15 is formed by connecting a plurality of beam members in the width direction, but the overlapped beam member 15 may be formed by connecting beam members made of three H-shaped steel members. ..

重合梁材部２１ａの両端面にはエンドプレート２４が溶接され、重合梁材部２１ｂの両端面にも同様にエンドプレート２４が溶接されている。ウェブ１５ａの両面には三角形のリブプレート２５が溶接され、それぞれのリブプレート２５はエンドプレート２４に溶接されており、リブプレート２５によりエンドプレート２４と重合梁材部２１ａ、２１ｂの接合強度が高められている。 End plates 24 are welded to both end faces of the overlapped beam member portion 21a, and end plates 24 are similarly welded to both end faces of the overlapped beam member portion 21b. Triangular rib plates 25 are welded to both sides of the web 15a, and each rib plate 25 is welded to the end plate 24. The rib plate 25 increases the joint strength between the end plate 24 and the overlapped beam members 21a and 21b. Has been.

２本の腹起材１２と２本の腹起材１３は、それぞれ単一梁材１４とその両端部に配置される重合梁材１５とにより構成されている。ただし、腹起材１２を構成する重合梁材１５は、腹起材１３の重合梁材１５よりも長い。また、それぞれの重合梁材１５は、２つの重合梁材部２１ａ、２１ｂを接続することにより形成されているが、重合梁材部２１ａの長さを重合梁材部２１ｂを含めた長い寸法とすれば、外側梁材２２と内側梁材２３とをそれぞれ１本とした重合梁材１５とすることができる。 The two upholstery members 12 and the two upholstery members 13 are each composed of a single beam member 14 and a superposed beam member 15 arranged at both ends thereof. However, the overlapped beam member 15 forming the uprising member 12 is longer than the overlapped beam member 15 of the uprising member 13. Further, each of the overlapped beam members 15 is formed by connecting the two overlapped beam members 21a and 21b, but the length of the overlapped beam member 21a is set to a long dimension including the overlapped beam member 21b. By doing so, the outer beam member 22 and the inner beam member 23 can be made into one overlapped beam member 15, respectively.

図４は、単一梁材１４の端部と重合梁材１５の端部を示す斜視図であり、図５は単一梁材１４と重合梁材１５の接続部を示す斜視図である。 FIG. 4 is a perspective view showing an end portion of the single beam member 14 and an end portion of the overlapping beam member 15, and FIG. 5 is a perspective view showing a connecting portion between the single beam member 14 and the overlapping beam member 15.

重合梁材１５に取り付けられたエンドプレート２４には、単一梁材１４のエンドプレート１６に設けられたボルト取付孔１７に対応させて複数のボルト取付孔２６が設けられている。単一梁材１４と重合梁材１５は、図５に示されるように、両方のエンドプレート２４、１６に設けられたボルト取付孔を貫通する複数のボルト２７により締結される。 The end plate 24 attached to the overlap beam member 15 is provided with a plurality of bolt attachment holes 26 corresponding to the bolt attachment holes 17 provided in the end plate 16 of the single beam member 14. As shown in FIG. 5, the single beam member 14 and the overlapped beam member 15 are fastened by a plurality of bolts 27 penetrating bolt mounting holes provided in both end plates 24, 16.

図３および図５に示されるように、単一梁材１４の端部の外側面と重合梁材１５の端部の外側面とには、これらを跨がってカバープレート３１が複数のボルト３２により締結される。このカバープレート３１により単一梁材１４と重合梁材１５は外側面において締結される。 As shown in FIG. 3 and FIG. 5, the cover plate 31 has a plurality of bolts on the outer surface of the end portion of the single beam member 14 and the outer surface of the end portion of the overlapped beam member 15 so as to straddle them. It is fastened by 32. The cover plate 31 fastens the single beam member 14 and the overlapped beam member 15 on the outer side surface.

単一梁材１４の端部の内側面と重合梁材１５の端部の外側面とには、これらを跨がって火打受けピース３３が当て板３４を介して複数のボルト３５により締結される。火打受けピース３３は図３および図５に示されるように、異形五角形の平面形状をした複数の鋼板により形成されている。 On the inner surface of the end portion of the single beam member 14 and the outer surface of the end portion of the overlapping beam member 15, a fire hitting piece 33 is fastened by a plurality of bolts 35 via a backing plate 34 across them. It As shown in FIGS. 3 and 5, the slamming piece 33 is formed of a plurality of steel plates having an irregular pentagonal planar shape.

図１に示されるように、四辺形の掘削部１０の側面に設けられた山留壁１１ａ〜１１ｄを保持するために、４本の腹起材１２、１３を同一平面に四辺形に配置した場合には、相互に隣り合う腹起材により４つのコーナー部が形成される。それぞれのコーナー部を保持するために、コーナー部を介して隣り合う２つの火打受けピース３３の間には、火打材３６が取り付けられる。火打材３６はＨ形鋼材等により形成されており、火打材３６には火打受けピース３３に向かう方向の押し付け力を加えるために、ねじ式のジャッキ３７が設けられている。ただし、ねじ式のジャッキに代えて油圧ジャッキを設けるようにしても良い。 As shown in FIG. 1, in order to hold the mountain retaining walls 11a to 11d provided on the side surface of the quadrilateral excavation portion 10, four uprising members 12 and 13 are arranged in a quadrangle on the same plane. In this case, four corner portions are formed by the upholstery materials adjacent to each other. In order to hold the respective corner portions, a hitting material 36 is attached between two fire hitting pieces 33 that are adjacent to each other via the corner portions. The hitting material 36 is made of an H-shaped steel material or the like, and the hitting material 36 is provided with a screw type jack 37 in order to apply a pressing force in the direction toward the hitting piece 33. However, a hydraulic jack may be provided instead of the screw type jack.

火打材３６にジャッキ３７を設けると、山留壁１１ａ〜１１ｄを介して単一梁材１４に加わる土圧により単一梁材１４はその端部を曲げ変形の基端部として、単一梁材１４の曲げモーメントを計算することができる。火打受けピース３３を単一梁材１４の端部よりも重合梁材１５にずらして設けると、単一梁材１４の曲げ変形の基端部が重合梁材１５の位置となるので、土圧により単一梁材１４に加わる曲げモーメントが図１に示す場合よりも大きくなる。 When the jack 37 is provided on the hitting material 36, the single beam member 14 has its end portion as a base end portion of bending deformation due to earth pressure applied to the single beam member 14 via the mountain retaining walls 11a to 11d. The bending moment of the material 14 can be calculated. When the fire hitting piece 33 is provided so as to be shifted from the end portion of the single beam member 14 on the overlapped beam member 15, the base end portion of the bending deformation of the single beam member 14 is located at the overlap beam member 15, so Therefore, the bending moment applied to the single beam member 14 becomes larger than that shown in FIG.

したがって、図１に示すように、単一梁材１４と重合梁材１５の接続部に火打受けピース３３を取り付けて、火打材３６にジャッキ３７を設けると、単一梁材１４に加わる曲げモーメントが小さくなるので、単一梁材１４としてより小型の高強度梁材を使用することができる。 Therefore, as shown in FIG. 1, when the hitting piece 33 is attached to the connecting portion between the single beam member 14 and the overlapped beam member 15 and the jack 37 is provided on the hitting member 36, the bending moment applied to the single beam member 14 is increased. Therefore, a smaller high-strength beam material can be used as the single beam material 14.

上述のように、単一梁材１４と重合梁材１５は、それぞれの外側面がカバープレート３１により連結され、それぞれの内側面が火打受けピース３３により連結されており、火打受けピース３３は単一梁材１４と重合梁材１５とを連結するためのプレートとしての機能を有している。これにより、従来では、外側面と内側面とにそれぞれカバープレートを締結する必要があったが、本発明においては、１枚のカバープレート３１により単一梁材１４の一端部と重合梁材１５の一端部とを連結することができる。したがって、カバープレートを内側面と外側面とにボルト止めする場合に比して、山留壁の架構構造を短時間で構築することができ、架構構造の構築作業性を効率的に行うことができる。 As described above, the single beam member 14 and the overlapped beam member 15 have their outer surfaces connected by the cover plate 31 and their inner surfaces connected by the fire hitting piece 33. It has a function as a plate for connecting the one-beam member 14 and the overlapping beam member 15. As a result, conventionally, it has been necessary to fasten the cover plates to the outer surface and the inner surface, respectively, but in the present invention, one cover plate 31 is used to form one end portion of the single beam member 14 and the overlap beam member 15. Can be connected to one end of the. Therefore, compared with the case where the cover plate is bolted to the inner side surface and the outer side surface, the frame structure of the mountain retaining wall can be constructed in a short time, and the workability of constructing the frame structure can be efficiently performed. it can.

また、高強度の溶接構造用圧延鋼材からなる単一梁材１４は、山留壁を支えるために高い強度が必要な火打材３６の取付点の内側のみに使用するので、無駄の少ない配置になるとともに、火打材取付部には継手としてのエンドプレート２４が存在するため、スティフナー補強の代わりになる。さらに、火打受けピース３３がカバープレート３１の代わりになるため、プレートの数とボルト本数を低減することができる。 Further, since the single beam member 14 made of high-strength rolled steel for welded structure is used only inside the attachment point of the striking material 36, which requires high strength to support the retaining wall, it can be disposed with less waste. In addition, since the end plate 24 as a joint is present in the fired material mounting portion, it is a substitute for stiffener reinforcement. Furthermore, since the fire hitting piece 33 substitutes for the cover plate 31, the number of plates and the number of bolts can be reduced.

しかも、火打受けピース３３の端部に位置させて単一梁材１４にはスティフナープレート１９が取り付けられているので、山留壁から火打受けピース３３に土圧が加わる部分にスティフナープレート１９が位置し、単一梁材１４の強度を高めることができる。 Moreover, since the stiffener plate 19 is attached to the single beam member 14 so as to be located at the end of the struck piece 33, the stiffener plate 19 is located at the portion where earth pressure is applied to the struck piece 33 from the mountain retaining wall. Therefore, the strength of the single beam member 14 can be increased.

（第２の実施の形態） (Second embodiment)

図７は、他の実施の形態である山留壁の架構構造を示す一部省略平面図である。この架構構造においては、上述した場合と相違し、重合梁材１５の長さが単一梁材１４の長さに比して長い。それぞれの腹起材１２、１３における単一梁材１４と重合梁材１５との接続部には、上述した図３および図５に示した場合と同様に、カバープレート３１と火打受けピース３３とがボルト止めされている。ただし、図７にはカバープレート３１が省略されている。上述した場合と同様に、スティフナープレート１９が火打受けピース３３の端部に位置させて単一梁材１４に取り付けられており、単一梁材１４の強度が高められている。 FIG. 7 is a partially omitted plan view showing a frame structure of a mountain retaining wall which is another embodiment. In this frame structure, unlike the case described above, the length of the overlapping beam member 15 is longer than the length of the single beam member 14. At the connection portion between the single beam member 14 and the overlapped beam member 15 in each of the uprising members 12, 13, the cover plate 31 and the struck piece 33 are provided as in the case shown in FIGS. 3 and 5 described above. Is bolted. However, the cover plate 31 is omitted in FIG. 7. As in the case described above, the stiffener plate 19 is attached to the single beam member 14 while being positioned at the end of the struck piece 33, and the strength of the single beam member 14 is increased.

重合梁材１５は、第１の重合梁材部２１ａと第２の重合梁材部２１ｂとにより構成されており、重合梁材部２１ａは重合梁材部２１ｂに比して、図１に示した場合よりも、長く設定されている。長い重合梁材部２１ａを保持するために、図７に示されるように、重合梁材部２１ａの内面には、火打受けピース４１が取り付けられ、隣り合う火打受けピース４１の間には火打材４２が取り付けられている。 The overlapped beam member 15 is composed of a first overlapped beam member portion 21a and a second overlapped beam member portion 21b. The overlapped beam member portion 21a is shown in FIG. 1 in comparison with the overlapped beam member portion 21b. Has been set longer than if. In order to hold the long overlapped beam members 21a, as shown in FIG. 7, a hitting piece 41 is attached to the inner surface of the overlapped beam member 21a, and a hitting piece 41 is provided between adjacent hitting pieces 41. 42 is attached.

（第３の実施の形態） (Third Embodiment)

図８は、さらに他の実施の形態である山留壁の架構構造を示す一部省略平面図である。この架構構造においては、図示は省略されているが、２本の腹起材１２は、上述した場合と同様に、単一梁材１４と２つの重合梁材１５とにより形成されている。これに対し、２本の腹起材１３は、中央の重合梁材４５とその両端部に連結される重合梁材１５とにより形成されている。 FIG. 8 is a partially omitted plan view showing a frame structure of a mountain retaining wall which is still another embodiment. In this frame structure, although not shown, the two upholstery members 12 are formed by the single beam member 14 and the two overlapping beam members 15 as in the case described above. On the other hand, the two uprising members 13 are formed by the central beam member 45 and the beam members 15 connected to both ends thereof.

２本の腹起材１２における単一梁材１４と重合梁材１５との接続部には、上述した場合と同様に、カバープレート３１と火打受けピース３３とがボルトにより締結されている。これに対し、火打材３６により腹起材１２に取り付けられた火打受けピース３３に連結される火打受けピース３３は、重合梁材４５に締結されている。 At the connecting portion between the single beam member 14 and the overlapping beam member 15 in the two uprising members 12, the cover plate 31 and the fire hitting piece 33 are fastened with bolts, as in the case described above. On the other hand, the hitting piece 33, which is connected to the hitting piece 33 attached to the uprising material 12 by the hitting material 36, is fastened to the overlapped beam 45.

このように、４本の腹起材１２、１３のうち、２本の腹起材１２に単一梁材１４を設けるようにした場合においても、単一梁材１４と重合梁材１５との接続端部にカバープレート３１と火打受けピース３３とを取り付けることにより、腹起材１２の強度を高めることができる。このような形態の架構構造は、山留壁１１ａ、１１ｂから腹起材１２に加わる土圧が山留壁１１ｃ、１１ｄから腹起材１３に加わる土圧よりも高い場合に好適である。 As described above, even when the single beam member 14 is provided on two of the four upholstery members 12 and 13, the single beam member 14 and the overlapped beam member 15 are The strength of the uprising member 12 can be increased by attaching the cover plate 31 and the fire hitting piece 33 to the connection end. The frame structure of such a form is suitable when the earth pressure applied to the uprising material 12 from the mountain retaining walls 11a and 11b is higher than the earth pressure applied to the uprising material 13 from the mountain retaining walls 11c and 11d.

なお、図８に示した腹起材１２においては、重合梁材１５が２つの重合梁材部２１ａ、２１ｂにより構成されているのに対し、腹起材１３の重合梁材１５は１つの重合梁材部から構成されている。 In the upholstery member 12 shown in FIG. 8, the overlapped beam member 15 is composed of two overlapped beam members 21a and 21b, whereas the overlapped beam member 15 of the upriser member 13 is one overlapped beam member. It is composed of beam members.

重合梁材部２１ａの内面には、図７に示した架構構造と同様に、火打受けピース４１が取り付けられ、隣り合う火打受けピース４１の間には火打材４２が取り付けられている。 Similar to the frame structure shown in FIG. 7, a hitting piece 41 is attached to the inner surface of the overlapped beam member 21a, and a hitting material 42 is attached between adjacent hitting pieces 41.

（第４の実施の形態） (Fourth Embodiment)

図９は、さらに他の実施の形態である山留壁の架構構造を示す一部省略平面図である。この架構構造においては、２本の腹起材１２は、上述した場合と同様に、単一梁材１４と２つの重合梁材１５とにより形成されている。これに対し、２本の腹起材１３においては、図８と同様に、中央の重合梁材４５とその両端部に連結される２つの重合梁材１５とにより形成されている。それぞれの重合梁材１５は、２つの重合梁材部２１ａ、２１ｂを連結することにより構成されている。 FIG. 9 is a partially omitted plan view showing a frame structure of a mountain retaining wall which is still another embodiment. In this frame structure, the two uprising members 12 are formed by the single beam member 14 and the two overlapping beam members 15 as in the case described above. On the other hand, the two uprising members 13 are formed by the central overlap beam member 45 and the two overlap beam members 15 connected to both ends thereof, as in FIG. Each overlapped beam member 15 is configured by connecting two overlapped beam members 21a and 21b.

この形態の架構構造は、図８に示した場合と同様に、山留壁１１ａ、１１ｂから腹起材１２に加わる土圧が山留壁１１ｃ、１１ｄから腹起材１３に加わる土圧よりも高い場合に好適である。 In the frame structure of this form, as in the case shown in FIG. 8, the earth pressure applied to the upholstery material 12 from the mountain retaining walls 11a and 11b is lower than the earth pressure applied to the upholstery material 13 from the mountain retaining walls 11c and 11d. It is suitable when it is high.

本発明は前記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。上述した実施の形態においては、地盤に四辺形に掘削された掘削部の周囲の側面にそれぞれ山留壁を構築し、四辺形に腹起材１２、１３を架設した場合が示されているが、直角等の角度を以て交差するように側面に設けられた山留壁を保持するために相互に連結される２本の腹起材を構成する単一梁材と重合梁材との接合部にも本発明を適用することができる。 The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the invention. In the above-described embodiment, the case is shown in which mountain retaining walls are respectively constructed on the side surfaces around the excavated portion that is excavated in the ground, and the uprising members 12, 13 are installed in the quadrilateral. , At the joint between the single beam and the overlapped beam that constitute two uprising members that are connected to each other to hold the mountain retaining walls that are provided on the sides so as to intersect at an angle such as a right angle The present invention can also be applied.

それぞれの実施の形態においても、山留壁の架設時の手間を減らすことができ、工期の短縮を達成し、経済性を向上させることができる。 Also in each of the embodiments, it is possible to reduce the labor at the time of constructing the mountain retaining wall, achieve the shortening of the construction period, and improve the economical efficiency.

本発明は、土木建築現場において配置される山留壁を保持するために適用することができる。 INDUSTRIAL APPLICABILITY The present invention can be applied to hold a mountain retaining wall arranged in a civil engineering construction site.

１０ 掘削部
１１ａ〜１１ｄ 山留壁
１２、１３ 腹起材
１４ 単一梁材
１５ 重合梁材
１６ エンドプレート
１９ スティフナープレート
２１ａ、２１ｂ 重合梁材部
２２ 外側梁材
２３ 内側梁材
２４ エンドプレート
２５ リブプレート
３１ カバープレート
３３ 火打受けピース
３４ 当て板
３６ 火打材
３７ ジャッキ
４１ 火打受けピース
４２ 火打材
４５ 重合梁材 10 excavated part 11a-11d Yamadome wall 12,13 uprising material 14 single beam material 15 overlapped beam material 16 end plate 19 stiffener plates 21a, 21b overlapped beam material part 22 outer beam material 23 inner beam material 24 end plate 25 ribs Plate 31 Cover plate 33 Fire hitting piece 34 Patch plate 36 Fire hitting material 37 Jack 41 Fire hitting piece 42 Fire hitting material 45 Overlapped beam material

Claims (3)

山留壁の内面に水平方向に配置される腹起材と、隣り合う前記腹起材の間に架設される火打材とを備えた山留壁の架構構造であって、
形鋼からなる単一梁材と、当該単一梁材よりも幅寸法が小型の複数の形鋼からなり前記単一梁材の両端部に配置される重合梁材とにより前記腹起材を形成し、
前記単一梁材の端部の外側面と前記重合梁材の端部の外側面とに跨がって配置されるカバープレートにより前記単一梁材と前記重合梁材とを締結し、
前記単一梁材の端部の内側面と前記重合梁材の端部の内側面とに跨がって配置される火打受けピースにより前記単一梁材と前記重合梁材とを締結し、
前記火打受けピースに前記火打材を締結する、
ことを特徴とする山留壁の架構構造。 A frame structure of a mountain retaining wall provided with an upholstery material horizontally arranged on the inner surface of the mountain retaining wall, and a flint material installed between the adjacent uprising materials,
A single beam member made of shaped steel, and a polymerized beam member made of a plurality of shaped steel members having a width dimension smaller than that of the single beam member and arranged at both ends of the single beam member to form the reentrant member. Forming,
Fastening the single beam member and the overlapped beam member by a cover plate arranged across the outer surface of the end portion of the single beam member and the outer surface of the end portion of the overlapped beam member,
Fastening the single beam and the polymerized beam by a hitting piece arranged across the inner surface of the end of the single beam and the inner surface of the end of the polymerized beam,
Fastening the flint material to the fluff receiving piece,
The frame structure of the Yamadome wall, which is characterized by this. 前記単一梁材に、前記火打受けピースの端部に位置させてスティフナープレートを設けた、
ことを特徴とする請求項１記載の山留壁の架構構造。 The stiffener plate is provided on the single beam member at the end of the struck piece.
The frame structure of the mountain retaining wall according to claim 1, characterized in that. 前記火打受けピースに押し付け力を加えるジャッキを前記火打材に設けた、
ことを特徴とする請求項１または２記載の山留壁の架構構造。
A jack for applying a pressing force to the hitting piece is provided on the hitting material,
The frame structure of the mountain retaining wall according to claim 1 or 2.
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