JP2004003255A - Core material for earth retaining wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core material for an earth retaining wall having position regulation action on a coupling part and easy in manufacture and having rigidity. <P>SOLUTION: The core material has a first wide-flange shape steel 3 for a plane cross section H shape; a plane cross sectional substantially L-shaped male coupling 9 provided on the edge part of the flange of the first H shape member 3; a second wide-flange shape steel 5 for a plane cross section wide-flange shape steel arranged adjacently on the first wide-flange shape steel 3; and a plane cross sectional groove-shaped male coupling 11 for engaging the male coupling 9 provided on the edge of the flange of the second wide-flange shape steel 5. The male coupling 9 joins one L-shaped piece end on the end of the flange of the first wide-flange shape steel 3 to be continuously extended to the flange, and arranges the other piece toward the inside direction of the flange. In a female coupling 11, one side piece groove-shaped upper end joins an open side on the inner face of the flange toward the outside. In an engagement state of the male coupling 9 and the female coupling 11, the other piece L-shaped edge of the male coupling 9 is oppositely arranged on a groove-shaped bottom piece of the female coupling 11, and the other groove-shaped side piece of the female coupling 11 is oppositely arranged on one L-shaped piece or the flange of the first wide-flange shape steel 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a core material of a retaining wall that is disposed as a core material on a retaining wall made of soil cement, cement milk, or concrete installed in the ground.
[0002]
[Prior art]
FIG. 6 is a plan view showing the configuration of a conventional retaining wall disclosed in Japanese Patent Application Laid-Open No. 8-109631. In FIG. 6, the flange-side edges 102 of two H-shaped steel members 101 are abutted to each other and joined together to form an H-shaped steel joint body 103. It is provided on the inner side surface on the web side in the vicinity of the edge, and has a substantially C-shape having a corner obtained by cutting off a part of one side of a rectangular cross section.
On the other hand, the male joints 105 are provided on the other side edges of the upper and lower flanges, respectively, on the inner side (web side) of the outer surfaces of the flanges, and have a substantially L-shaped shape having a substantially T-shaped holding portion. I have.
[0003]
In the H-shaped joint 103 configured as described above, the male joint 105 is built while inserting it into the pocket of the female joint 104, and then soil cement is poured to form a retaining wall. It is to be noted that the soil cement may be poured first, and the H-shaped joined body 103 may be built later.
[0004]
[Problems to be solved by the invention]
The above prior art has the following problems.
(1) Although a substantially T-shaped male joint 105 is inserted into a substantially C-shaped female joint 104 to connect the H-shaped steel joint 103, the position of the female joint 104 and the male joint 105 is restricted. Nothing has been done. Therefore, the male joint 105 can move freely within the female joint 104, and as a result, a displacement occurs between the adjacent H-shaped steel joints 103, and it is difficult to maintain the accuracy of the final structure.
(2) A substantially L-shaped male joint having a substantially T-shaped holding portion is formed by welding an I-shaped steel in half and flat steel by welding, or by cutting a steel sheet into a predetermined width. Is formed by welding to an L-section steel, which is troublesome and expensive to manufacture.
(3) When a specific core material of the earth retaining wall is bent (a load in a direction in which the belly protruding portion protrudes), a male joint for connecting the core material and the left and right core materials of the core material includes a core. Since the rigidity is smaller than that of the material, the bending load cannot be shared with the left and right core members, resulting in excessive deformation or yielding.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to provide a rigid core material for a retaining wall which has a position regulating action in a joint portion, is easy to manufacture, and is rigid.
[0006]
[Means for Solving the Problems]
The core material of the retaining wall according to the present invention is disposed as a core material in soil cement, cement milk, or concrete installed in the ground to form the retaining wall, and has a flat cross-sectional H shape. A first H-shaped member, a male joint having a substantially L-shaped cross section provided on a flange edge of the first H-shaped member, a second H-shaped member having a H-shaped flat cross-section disposed adjacent to the first H-shaped member, A male connector provided on a flange edge of the 2H-shaped member, the female connector having a flat cross-sectional groove capable of engaging with the male joint, wherein the male joint has one end of an L-shaped flange end of the first H-shaped member. And the other joint is disposed facing the inside of the flange, and the female joint has an upper end on one side of the groove on the inner surface of the flange of the second H-shaped member. Joined with the opening side facing out,
In the engagement state of the male joint and the female joint, the L-shaped other end of the male joint is disposed to face the groove-shaped bottom piece of the female joint, and the other end of the groove-shaped female joint has the L-shaped end. It is characterized by being arranged opposite to a piece of a shape or a flange of said first H-shaped member.
[0007]
Further, the male joint and the female joint are formed of members having substantially the same thickness as the flanges of the first and second H-shaped members.
[0008]
In the present invention, the first H-shaped member and the second H-shaped member may be a single H-shaped steel member, or may be a joined body in which flange ends of a plurality of H-shaped steel members are joined.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a plan view showing an embodiment of a core material of a retaining wall according to the present invention. As shown in FIG. 1, the core material 1 of the retaining wall is composed of two H-shaped steels and H-shaped joined bodies 3 and 5 (first and second H-shaped bodies of the present invention) in which end faces of flange edges thereof are joined to each other. (Corresponding to a member) are connected by a joint portion 7. The joint 7 has a male shape and a female shape. One of the H-shaped joints 3 and 5 adjacent to each other has a male shape and the other has a female shape.
[0010]
FIG. 2 is an enlarged view of the joint portion 7 surrounded by a circle A in FIG. The structure of the joint 7 will be described based on FIG.
A male joint 9 having an L-shaped flat cross section is provided on the right flange portion in the figure of the H-shaped joined body 3 on the left side in the figure. In this male joint 9, the end of one piece 9a of the L-shape is joined to the end of the flange of the H-shaped steel constituting the H-shaped joint 3, and continuously extends to the flange. It is arranged facing.
The male joint 9 is provided above and below in the figure. The upper and lower male joints 9 are arranged such that the other L-shaped pieces 9b face each other.
The male joint 9 having an L-shaped flat section is formed from an L-shaped steel manufactured by rolling, and the thickness thereof is set to be the same as the thickness of the flange of the H-shaped steel constituting the H-shaped joints 3 and 5. Therefore, the male joint 9 has the same rigidity as the flange of the H-shaped steel constituting the H-shaped joints 3 and 5.
[0011]
A female joint 11 having a flat cross-sectional groove shape is provided on the left flange portion in the drawing of the H-shaped joint 5 on the right side in the drawing. The female joint 11 has an upper end portion of one of the groove-shaped side pieces 11a joined to the inner surface of the flange of the H-shaped joint body 5 with the opening side facing outward.
The female joint 11 is provided above and below in the figure. Since the upper and lower female joints 11 are both installed with their openings facing outward, the groove-shaped bottom pieces 11b are in a back-to-back state.
[0012]
When the male joint 9 and the female joint 11 configured as described above are engaged with each other, the other L-shaped piece 9b of the male joint 9 is fitted into the groove-shaped opening of the female joint 11 as shown in FIGS. Inserted. At this time, the end of the other piece 9b of the L shape is arranged with a slight gap with the groove-shaped bottom piece 11b. Similarly, the tip of the other side piece 11c of the groove shape is arranged on the inner surface of the flange of the H-shaped joint 3 with a slight gap. This is the same for the upper and lower joints.
Note that soil cement or the like is interposed in the gap 15 between the male joint 9 and the female joint 11.
By setting the male joint 9 and the female joint 11 in the above-described arrangement relationship, the position between the adjacent H-shaped joints 3 and 5 in the direction perpendicular to the flange (the vertical direction in the figure) is regulated, and the displacement is prevented. Is done.
[0013]
Here, the effect of preventing the displacement will be described in more detail with reference to FIG. The description will be made on the assumption that the H-shaped joint 5 on the right side in the figure is displaced with reference to the H-shaped joint 3 on the left side in the figure.
First, when the H-shaped joint 5 is going to shift in the direction of arrow A, the portions indicated by A and B in the drawing come into contact with each other, thereby preventing this shift.
Further, when the H-shaped joint 5 is to be displaced in the direction of arrow A, the portions indicated by C and D in the drawing come into contact with each other, thereby preventing the displacement.
Further, when the H-shaped joined body 5 tries to rotate in the direction of the arrow C, the portions indicated by B and E in the figure come into contact with each other, thereby preventing the rotation.
Further, when the H-shaped joint 5 attempts to rotate in the direction of arrow D, the portions indicated by D and F in the drawing abut, thereby preventing rotation.
[0014]
As described above, since the joint portion 7 exerts a position regulating function against displacement and rotation in the direction perpendicular to the flange, the adjacent H-shaped joints 3 and 5 are held substantially in a straight line. Since there is nothing protruding outside the flange, as shown in FIG. 4, the H-shaped steel 29 for raising the belly can directly contact the flanges of the H-shaped joints 3 and 5.
[0015]
The positional accuracy of the core material in the axial direction is ensured by disposing the flange end of the H-shaped joined body adjacent to the end of the L-shaped bent portion in close proximity, and the displacement is also prevented.
[0016]
As described above, according to the present embodiment, it is possible to prevent misalignment of the core material while having a simple structure, and to construct an accurate earth retaining wall.
Further, since the thickness of the male joint 9 and the female joint 11 is the same as that of the flange, even when a specific core material of the retaining wall is bent, only the joint portion 7 is not significantly deformed.
Furthermore, with the above configuration, since the welded portions of the male joint 9 and the female joint 11 are close to the flange edges of the H-shaped joints 3 and 5, there is no welding work in a narrow place close to the web, and workability is improved. Is good.
[0017]
Embodiment 2 FIG.
FIG. 5 is an explanatory view of another embodiment of the present invention, and is a plan view of a core material of a retaining wall, similarly to FIG.
In the present embodiment, the H-shaped joint 3 is provided with male joints 9 on both sides in the axial direction of the core material, and female joints 11 on both sides of the H-shaped joint 5 adjacent thereto.
Needless to say, the same effects as those of the first embodiment can be obtained with such a device.
[0018]
【The invention's effect】
As described above, according to the present invention, since the male joint and the female joint have a position regulating function, it is possible to prevent the displacement of the core material while having a simple structure and to construct an accurate earth retaining wall.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of the present invention.
FIG. 2 is an enlarged view showing a part of FIG. 1 in an enlarged manner.
FIG. 3 is an explanatory diagram of the operation of the embodiment of the present invention.
FIG. 4 is an explanatory diagram of the operation of the embodiment of the present invention.
FIG. 5 is a plan view of another embodiment of the present invention.
FIG. 6 is a plan view showing a configuration of a conventional earth retaining wall.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Core material 3,5 H type joint 7 Joint part 9 Male joint 11 Female joint

Claims (2)

Core material of soil retaining wall that is arranged as a core material in soil cement, cement milk, or concrete installed in the ground, and forms a retaining wall,
A first H-shaped member having an H-shaped cross section, a male joint having a substantially L-shaped cross-section provided on a flange edge of the first H-shaped member, and a second H-shaped member having an H-shaped flat cross-section disposed adjacent to the first H-shaped member; A member having a flat cross-sectional groove-shaped female joint with which the male joint provided on the flange edge of the second H-shaped member can be engaged;
In the male joint, one end of the L-shaped member is joined to a flange end of the first H-shaped member and continuously extends to the flange, and the other piece is arranged facing the inside of the flange,
In the female joint, the upper end of one side piece of the groove is joined to the inner surface of the flange of the second H-shaped member with the opening side facing outward,
In the engagement state of the male joint and the female joint, the L-shaped other end of the male joint is disposed to face the groove-shaped bottom piece of the female joint, and the other end of the groove-shaped female joint has the L-shaped end. A core material for a retaining wall, wherein the core material is arranged to face a piece of a shape or a flange of the first H-shaped member. The core material of the retaining wall according to claim 1, wherein the male joint and the female joint are formed of members having substantially the same thickness as the flanges of the first and second H-shaped members.

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