JPH0380930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a retaining wall.

Conventionally, a retaining wall has been formed using a steel material in which connecting joints 4 are provided at both ends of a groove steel 5 having a square cross section as shown in FIG. 1, or an equilateral H-shaped steel material as shown in FIG. It is known that a retaining wall is formed using a steel material in which connecting joint portions 4 are provided at both ends of each flange 7 of 6. Those using equilateral H-shaped steel 6 are groove steel 5.
The rigidity per unit weight ratio is higher than that of the equilateral H-shaped steel 6, and it is economical because thin-walled steel can be used to obtain the necessary rigidity.
6, if the retaining wall is non-linear in cross section or has corners, when forming these, the flange 7 of the adjacent equilateral H-shaped steel 6 is used as shown in Fig. 3. There was a problem in that the retaining walls were in the way and could not be connected to each other, and therefore it was impossible to form retaining walls that were non-linear or had corners. Moreover, simply connecting the connecting joint parts 4 to each other caused a problem in water-tightness at the connecting part.

The present invention was invented in view of the above-mentioned conventional problems, and its purpose is to provide a retaining wall that is strong, economical, and has a non-linear shape and corners. To provide a method for constructing a mountain retaining wall which can be formed reliably and has good water-tightness at connecting parts.

The method for constructing a retaining wall of the present invention is to use scalene H-shaped steel 3 in which one flange width of one flange is longer than the other flange 2 width, and the thickness of the shorter flange 2 is thicker than the thickness of the longer flange 1. A steel material 9 having connecting joints 4 at both ends of the longer flange 1,
Soil cement wall or soil bentonite wall 1 made of a mixture of earth and sand formed in the ground 10 and a water-stop material
2, when the soil cement or soil bentonite is in an unhardened state, the connecting joint parts 4 of adjacent steel materials are built continuously so that they connect with each other, and the continuous part of the connecting joint parts 4 is It is characterized by being watertight with a watertight material.
The present invention will be explained in detail below with reference to Examples. The steel material 9 used in the present invention has the following configuration. That is, one of the flanges of the conventional narrow H-shaped steel is extended to both sides to form a longer flange 1 having an extension part 8. Therefore, the longer flange 1 having the extension 8 has a longer width than the shorter flange 2. At the ends of the extensions 8 at both ends of the longer flange 1, a connecting joint 4 having a C-shaped or hook-shaped cross section is further provided. Here, to show a specific example of the steel material 9 for retaining walls of the present invention, in Fig. 5, A = 400 mm, B = 600 mm.
mm, B′ = 200mm, t ₁ = 4.5mm, t ₂ = 6mm, t ₃ = 18mm
However, it is needless to say that it is not necessarily limited to the above numerical values. The retaining wall is formed using the steel material 9 having the above structure,
In the present invention, column rows such as soil cement columns and soil bentonite columns 11 are formed in the ground 10 (pillars are formed in the ground by mixing water-stopping material such as cement milk and earth and sand). When the soil cement column, soil bentonite column 11, etc. are unhardened, the steel material 9 is inserted and the next steel material 9 is inserted while using the connecting joint part 4 as a guide to connect the adjacent steel materials 9. In the same way, steel materials 9 are connected one after another through the connection joint portion 4, and in this way, soil cement walls or soils having the steel materials 9 for retaining walls as the core material are connected. This forms a bentonite wall 12, that is, a retaining wall. Here, the steel material 9 serves as a water-stopping member by becoming a stress member of the retaining wall and being connected by the connecting joint portion 4. Further, by hardening a water-stopping material such as cement milk, water is stopped at the connection portion between the connection joints 4. However, since one flange 1 is longer than the other flange 2, even if the retaining wall is non-linear or has a corner part, the shorter flanges 2, 2 of the adjacent steel members 9 are The longer flanges 1, 1 can be connected to each other without interfering with each other.

The steel material of the present invention, which has connection joints at both ends of the longer flange of scalene H-shaped steel whose flange width on one side is longer than the other flange width, is formed in the ground and is a soil mixture of earth and sand and water-stopping material. Connecting joints are constructed by continuously building a cement wall, soil bentonite wall, etc. so that the connecting joints of adjacent steel materials connect with each other when the soil cement or soil bentonite wall is in an unhardened state. H
The retaining wall can be formed using an economical steel material that maintains its shape as a shaped steel, has no excess parts, has high rigidity in terms of unit weight ratio, and is H-shaped steel, but because it is scalene H-shaped steel, it can be used for connection joints. When connecting the flange to each other, even if the flange has a non-linear shape or a corner part, the flange that does not have a connecting joint part can be connected without getting in the way, and the flange that has a non-straight shape or a corner part The retaining wall can be formed using H-shaped steel with high rigidity, and especially when connecting joints like this, there is no connecting joint even if it is a non-linear shape or a corner part. Even though the width of one flange was longer than the other to prevent the flange from getting in the way, the thickness of the shorter flange was made thicker than the thickness of the longer flange. The strength of the shorter flange does not decrease, and the strength of the entire H-shaped steel can be balanced. In addition, since the above-mentioned steel materials are built continuously so that adjacent steel materials of the soil cement wall or soil bentonite wall formed in the ground are connected to each other, the steel material made of highly rigid scalene H-beam steel is used for the soil cement wall or soil bentonite wall. By using it as a core material such as soil bentonite walls, it is possible to form mountain retaining walls that are extremely strong and have excellent water-stopping properties.Furthermore, the water-stopping material can be used to stop water at the joints between connecting joints. The water-stopping effect of the entire mountain retaining wall is improved by ensuring that the connecting parts are water-stopped.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a conventional example, Fig. 2 is a cross-sectional view of another conventional example, Fig. 3 is an explanatory diagram of an example in which the conventional example shown in Fig. 2 cannot be connected at the corner, and Fig. 4 is a cross-sectional view of the conventional example. FIG. 5 is a cross-sectional view of a steel material used in the present invention, in which 1 is a flange, 2 is a cross-sectional view of an embodiment of the invention, and FIG.
3 is a flange, 3 is a scalene H-shaped steel, 4 is a connecting joint, 9 is a steel material, 10 is a ground, and 12 is a wall.

Claims (1)

[Claims] 1. A steel material having connecting joints at both ends of the longer flange of scalene H-beam steel, in which one flange width is longer than the other flange width and the shorter flange is thicker than the longer flange. When the soil cement or soil bentonite is in an unhardened state in a soil cement wall or soil bentonite wall made of a mixture of earth and sand and a waterproof material formed in the ground, the connecting joints of adjacent steel members are connected to each other. A method for constructing a mountain retaining wall, which is characterized in that the retaining wall is built continuously so as to be connected to each other, and the connecting portions between the connecting joints are watertight with a water-stopping material.