JP2010037900A - Earth retaining core material and earth retaining wall using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earth retaining core material capable of improving the in-plane rigidity of an earth retaining wall despite the fact that core materials can be inserted in the earth retaining wall one by one. <P>SOLUTION: A soil cement restraining member 2 includes a plurality of horizontal members 2a raised from a web 1a of an H-beam 1 and arranged at intervals in a vertical direction and a vertical member 2b arranged at a position connecting tip parts of the horizontal members 2a and integrated with them. The earth retaining core material A is constituted by fastening a plurality of soil cement restraining members 2 in parallel with one another to each surface of the web 1a of the H-beam 1. The earth retaining core material A is embedded in an earth retaining wall such as a soil cement continuous wall and a soil cement column wall. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a core material for mountain retaining that is embedded in a mountain retaining wall such as a soil cement continuous wall and a soil cement column wall.

  In order to improve the transmission of vertical force between the core material for mountain retaining and the soil cement around the core material, it has been widely practiced to weld head studs on both sides of the H-shaped steel web for core material. And is also described in Patent Document 1.

  However, even if the headed stud is set up on the H-shaped steel web for the core material, it is hardly useful for improving the in-plane rigidity of the retaining wall. This is because the in-plane rigidity of the retaining wall is greatly affected by the adhesion between the core material and the soil cement, but with a headed stud standing perpendicular to the web, the retaining wall sways in the in-plane direction due to seismic force. The longitudinal direction of the headed stud is parallel to the direction of shaking, and the headed stud does not restrain the soil cement. For this reason, the core material (H-shaped steel) and the soil cement are not attached during an earthquake, and the in-plane rigidity of the retaining wall is reduced.

  In Patent Document 1, in order to improve the horizontal strength (in-plane rigidity) of the retaining wall, a plurality of H-shaped steels arranged in parallel are welded to the X shape across the flanges on both sides. An invention is disclosed in which a core material for mountain fastening is configured by connecting with a steel material. This mountain retaining core material is effective in improving the in-plane rigidity of the mountain retaining wall, but a plurality of (specifically, a set of three) H-shaped steels are integrated to form one mountain retaining core material. Therefore, when it is desired to change the interval of the H-shaped steel in a part of the retaining wall, or when it is desired to insert every other core material in the soil cement column in the soil cement column row wall, the application is difficult.

JP 2008-2230 A

  The present invention has been made in view of the above-described problems, and the object of the present invention is to provide a core material that can be inserted one by one into a retaining wall without connecting a plurality of H-shaped steels. The purpose is to improve the in-plane rigidity of the retaining wall.

  The technical means taken by the present invention in order to achieve the above object are as follows. Namely, the core material for mountain retaining according to the invention of claim 1 is a core material for mountain retaining embedded in a retaining wall such as a soil cement continuous wall, a soil cement column wall, etc., on both sides of the H-shaped steel web. Soil cement restraint comprising a plurality of horizontal members rising from the web and spaced apart in the vertical direction, and a vertical member disposed at a position connecting the tip portions and integrated with the horizontal member The member is fixed. In the present invention, “horizontal” of the horizontal member and “vertical” of the vertical member are terms representing an approximate direction of the member, and do not need to be strictly “horizontal” or “vertical”.

  A second aspect of the present invention is the mountain fixing core member according to the first aspect, characterized in that a plurality of the soil cement restraining members are fixed in parallel to each other on both surfaces of the web.

The invention according to claim 3 is the core material for mountain fixing according to claim 2, characterized in that a horizontal connecting member is constructed between vertical members of the soil cement restraining members fixed in parallel to each other. Yes.

  The mountain retaining wall according to the invention described in claim 4 is characterized in that the core material for mountain retaining according to any one of claims 1 to 3 is embedded.

  According to the first aspect of the present invention, the in-plane rigidity of the retaining wall can be improved while the core member can be inserted into the retaining wall one by one without connecting a plurality of H-shaped steels. That is, since the tip portions of the upper and lower horizontal members rising from the web of the core material (H-shaped steel) are connected to each other by the vertical member, when the retaining wall sways in the in-plane direction due to the seismic force, The longitudinal direction of the member is perpendicular to the direction of shaking, and the soil cement is restrained by the vertical member, so that the adhesion between the core material (H-shaped steel) and the soil cement can be increased. Therefore, the in-plane rigidity of the retaining wall is improved.

  Also, in the construction method in which the core material is built in the excavation groove of the ground, and then soil cement is placed in the excavation groove with a tremy pipe to create a soil cement continuous wall, a headed stud is set up perpendicular to the web. In the conventional core material, the tremmy tube may be caught by the headed stud when the tremy tube is inserted or pulled up. According to the invention described in claim 1, a plurality of upper and lower parts rising from the web are provided. Since the front-end | tip parts of a horizontal member are connected with the vertical member, a vertical member becomes a guide member of a treme tube, and it can prevent that a treme tube is caught by the horizontal member which rose from the web.

  According to the first aspect of the present invention, a plurality of horizontal members that rise from the web and are spaced apart from each other in the vertical direction are disposed at a position connecting the tip portions thereof, and are integrated with the horizontal member. Although one soil cement restraining member composed of a vertical member may be provided on each side of the web, a plurality of soil cement restraining members may be provided on each side of the web as in the second aspect of the invention. If fixed in parallel, the soil cement is restrained more effectively by the soil cement restraining member, and the adhesion between the core material (H-shaped steel) and the soil cement can be further increased.

  According to the third aspect of the present invention, since the horizontal connecting member is installed between the vertical members of the soil cement restraining members fixed in parallel to each other, when the retaining wall swings in the in-plane direction due to the seismic force, The longitudinal direction of the connecting member is also orthogonal to the direction of shaking, and the restraint of the soil cement by the lateral connecting member is added, so that the adhesion between the core material (H-shaped steel) and the soil cement can be further increased. Moreover, the horizontal connecting member effectively transmits the vertical force between the core material (H-shaped steel) and the soil cement, thereby improving the vertical supporting force.

  According to the invention described in claim 4, it is possible to realize a mountain retaining wall having high in-plane rigidity.

  1 and 2 show a core material A for mountain fastening according to the present invention. This core material A for mountain fixing is composed of a plurality of horizontal members 2a that are vertically raised from the web 1a and spaced apart in the vertical direction on both sides of the web 1a of the H-section steel 1 and their tips. Two soil cement restraining members 2 each including a vertical member 2b which is disposed at a position where the two members are connected and are integrated with the horizontal member 2a are fixed in parallel to each other. In the illustrated example, a headed stud is used as the horizontal member 2a, and a steel bar is used as the vertical member 2b, which is welded to the head of the headed stud. The soil cement restraining member 2 is set to a size that fits within the width of the flange 1b. Although not shown, the vertical member 2b may be configured using a flat bar or a steel plate instead of the steel bar.

  As shown in FIG. 3, the above-described core material A for mountain fastening is embedded in a soil cement continuous wall B, or is embedded in a soil cement column wall C as shown in FIG. 4.

  According to the above configuration, the in-plane rigidity of the retaining wall can be improved in spite of the retaining core material A that can be inserted one by one into the retaining wall such as the soil cement continuous wall B or the soil cement column wall C. That is, since the tip portions of the upper and lower horizontal members 2a rising vertically from the web of the core material (H-shaped steel 1) are connected by the vertical member 2b, the mountain retaining wall is in the in-plane direction by the seismic force. When the vertical member 2b swings, the longitudinal direction of the vertical member 2b is orthogonal to the direction of the swing, and the soil cement is restrained by the vertical member 2b, thereby increasing the adhesion between the core material (H-shaped steel 1) and the soil cement. it can. Therefore, the in-plane rigidity of the retaining wall is improved.

  In addition, in the case of a construction method in which a soil cement continuous wall is created by placing a soil cement in a drilling groove hole with a tremy pipe after a core material is built in the ground drilling groove hole, a stud with a head perpendicular to the web In the case of the conventional core material, the treme tube may be caught on the headed stud when the treme tube is inserted or pulled up. Since the tip portions of the upper and lower horizontal members 2a are connected to each other by the vertical member 2b, the vertical member 2b serves as a guide member for the tremmy tube, and the tremy tube is hooked on the horizontal member 2a rising vertically from the web. Can be prevented.

  5 and 6 show another example of the core material A for mountain fastening according to the present invention. The core material A for mountain fixing is made of a steel cement constraining member 2 made of a steel plate, in which a horizontal member 2a and a vertical member 2b are integrated, and fixed to a plurality of vertical brackets 3 welded to a web with bolts and nuts 4 There is a feature in the point. Other configurations and operations are the same as those of the embodiment of FIGS.

  7 and 8 show another example of the core material A for mountain fastening according to the present invention. The core material A for mountain fastening is characterized in that a horizontal connecting member 2c is installed between vertical members 2b of soil cement restraining members 2 fixed in parallel to each other.

  According to this configuration, since the horizontal connecting member 2c is installed between the vertical members 2b of the soil cement restraining members 2 fixed in parallel to each other, when the mountain retaining wall swings in the in-plane direction due to the seismic force, the horizontal connecting member The longitudinal direction of 2c will also be orthogonal to the direction of shaking, and the restraint of the soil cement by the horizontal connecting member 2c will be added.

  Therefore, the adhesion between the core material (H-section steel 1) and the soil cement can be further increased. Moreover, the vertical connecting force between the core material (H-section steel 1) and the soil cement is effectively performed by the horizontal connecting member 2c, and the vertical supporting force is also improved.

  In addition, in the case of a construction method in which a soil cement continuous wall is formed by placing a soil cement in a excavation groove with a tremy pipe after a core material is built in the excavation groove of the ground, for example, as shown in FIGS. When the treme tube is inserted or pulled up when the trembling core A is formed by simply connecting the tip portions of the two horizontal members 2a composed of headed studs or the like with the horizontal connecting member 2c, Although it is easy to get caught in the corners of the horizontal member 2a and the horizontal connecting member 2c, in the core material A for retaining shown in FIGS. 7 and 8, the corners of the horizontal member 2a and the horizontal connecting member 2c are covered with the vertical member 2b. Therefore, the vertical member 2b becomes a guide member of the tremy tube, and the tremy tube is not easily caught. In each of the above-described embodiments, various materials can be used as the horizontal member 2a, the vertical member 2b, and the horizontal connecting member 2c as long as they have strength capable of restraining the soil cement during an earthquake. From the standpoints of ease of operation, price, ease of connection work by welding, etc., the optimum material is steel.

It is a perspective view which shows an example of the core material for mountain retaining concerning this invention. It is a top view. It is a general | schematic cross-sectional top view of the soil cement continuous wall which embed | buried the core material for mountain retaining. It is a general | schematic cross-sectional top view of the soil cement pillar row | line | column wall which embed | buried the core material for a mountain retaining. It is a perspective view which shows the other example of the core material for mountain retaining concerning this invention. It is a top view. It is a perspective view which shows the other example of the core material for mountain retaining concerning this invention. It is a top view. It is a perspective view of the core material for mountain retaining which shows a comparative example. It is a top view.

Explanation of symbols

A Core material for mountain fastening B Soil cement continuous wall C Soil cement column wall 1 H section steel 1a Web 1b Flange 2 Soil cement restraint member 2a Horizontal member 2b Vertical member 2c Horizontal connecting member 3 Bracket 4 Bolt / Nut

Claims (4)

  A retaining core material embedded in a retaining wall such as a soil cement continuous wall or a soil cement column wall, which is arranged on both sides of the H-shaped steel web, rising from the web and spaced apart in the vertical direction. A soil fixing core member comprising a plurality of horizontal members and a vertical member integrated with the horizontal member, which is disposed at a position connecting the tip portions of the horizontal members, is fixed.   The core material for mountain retaining according to claim 1, wherein a plurality of the soil cement restraining members are fixed in parallel to each other on both surfaces of the web.   The core material for mountain fixing according to claim 2, wherein a horizontal connecting member is constructed between vertical members of soil cement restraining members fixed in parallel to each other.   A mountain retaining wall in which the core material for mountain retaining according to any one of claims 1 to 3 is embedded.

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