JP5166162B2 - Retaining core and retaining wall using it - Google Patents

Description

The present invention relates to a mountain retaining core material 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 raised 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. Therefore, the core material (
The adhesion between the H-shaped steel and the soil cement is cut, and the in-plane rigidity of the retaining wall is lowered.

In Patent Document 1, in order to improve the horizontal proof stress (rigidity in the in-plane direction) of the retaining wall,
There is disclosed an invention in which a plurality of H-shaped steels arranged in parallel are connected by a steel material welded in an X shape across flanges on both sides thereof to constitute a core material for retaining. 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-mentioned problems, and the object is as follows.
An object of the present invention is to improve the in-plane rigidity of the retaining wall while using a core material that can be inserted one by one into the retaining wall without connecting a plurality of H-shaped steels.

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 first aspect of the present invention is a core material for mountain retaining embedded in a mountain retaining wall such as a soil cement continuous wall, a soil cement column wall, etc., on both surfaces of the H-shaped steel web. , respectively, a plurality of horizontal members and vertical members you continuously integrated vertically and is disposed at a position connecting their tip and said horizontal members arranged at intervals in the rising and vertically from the web Ri Do from a, it is characterized in that soil cement restraining member which is set to a dimension to fit within the width of the flange 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 parts of the upper and lower horizontal members rising from the web of the core material (H-shaped steel) are connected by the vertical member,
When the retaining wall sways in the in-plane direction due to the seismic force, the longitudinal direction of the vertical member becomes perpendicular to the direction of swaying, and the soil cement is restrained by the vertical member, and the core material (H-shaped steel) and the soil cement Adhesion 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 during insertion and pulling the tremie pipe, but tremie pipe is sometimes caught by the headed stud, according to the invention described in claim 1, housed within the width of the flange
Among the soil cement restraint members set to the full size, the top and bottom horizontal members rising from the web are connected by vertical members that are continuous in the vertical direction. It becomes a member, and it is possible to prevent the Tremy tube from being caught by a horizontal member rising from the web.

In the first aspect of the invention, the plurality of horizontal members rising from the web and spaced apart from each other in the vertical direction are arranged at a position connecting the tip portions thereof and integrated with the horizontal member . set vertically Ri Do and a vertical member you continuously, the dimensions to fit within the width of the flange
The soil cement restraining members may be provided on each side of the web one by one. However, as in the invention described in claim 2, a plurality of soil cement restraining members are fixed in parallel to each other on both sides of the web. If implemented, the soil cement is more effectively restrained by the soil cement restraining member, and the adhesion between the core material (H-shaped steel) and the soil cement can be further enhanced.

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. Also an example
For example, the ends of two rows of horizontal members composed of headed studs etc. are connected by a horizontal connecting member
If the core material is just a mountain cap, the tremy tube will be watered when the tremy tube is inserted or raised.
Although it is easy to get caught at the corners of the flat member and the horizontal connecting member, according to the invention of claim 3,
Since the corners of the flat member and the horizontal connecting member are covered with a vertical member continuous in the vertical direction,
The vertical member becomes a guide member of the tremy tube, and the tremy tube is less likely to be caught.

  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 fastening is H-section steel 1
A plurality of horizontal members 2a that are vertically raised from the web 1a and spaced apart from each other in the vertical direction on both surfaces of the web 1a, and the horizontal member 2a that is disposed at a position connecting the leading ends thereof. Two soil cement constraining members 2 each composed of an integrated vertical member 2b 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 retaining a mountain is embedded in a soil cement continuous wall B,
As shown in FIG. 4, it is embedded in the soil cement column wall C.

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. This core material A for mountain fastening is
A soil cement restraining member 2 in which a horizontal member 2a and a vertical member 2b are integrated with a steel plate is produced,
It is characterized in that it is secured with bolts and nuts 4 to a plurality of vertical brackets 3 welded to the web. 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. This core material A for mountain fastening is
Cross connecting member 2c between vertical members 2b of soil cement restraining members 2 fixed in parallel to each other
It is characterized by the construction of

According to this configuration, the vertical member 2b of the soil cement restraining member 2 fixed in parallel to each other.
Since the horizontal connecting member 2c is installed between them, when the mountain retaining wall swings in the in-plane direction due to the seismic force, the longitudinal direction of the horizontal connecting member 2c is also orthogonal to the direction of the swing, and the horizontal connecting member 2
The restraint of the soil cement by c 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 core member A is a mountain retaining core A in which the ends of two rows of horizontal members 2a made up of headed studs and the like are simply connected by a horizontal connecting member 2c, the tremy tube is horizontal when the tremy tube is inserted or pulled up. Although it is easy to get caught in the corners of the member 2a and the horizontal connecting member 2c, the corner member A of the mountain fastening shown in FIGS. 7 and 8 has a shape in which 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, the horizontal member 2a, the vertical member 2b, the horizontal connecting member 2
As for c, various materials can be adopted as long as they have a strength capable of restraining the soil cement during an earthquake. However, from the viewpoint of strength, ease of obtaining and processing, price, ease of connecting work by welding, etc. The optimal 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.

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 and a soil cement column wall, and is disposed on both sides of the H-shaped steel web, respectively, rising from the web and spaced apart in the vertical direction. that Ri Do and a plurality of horizontal members and vertical members you continuously integrated vertically and is disposed at a position connecting their tip and the horizontal member, falls within the width of the flange
A core material for mountain fixing, wherein a soil cement restraining member set to a size 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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