JPS5841229Y2 - Steel plate for earth retaining - Google Patents

Description

[Detailed description of the invention] The present invention relates to a steel plate for retaining earth that has excellent water-stopping properties.

Conventionally, earth retention in soft and flooded ground has been carried out using the steel sheet pile construction method, but if the steel sheet piles cannot be driven due to underground objects and discontinuous parts of the steel sheet piles occur, earth retention at the discontinuous parts can be carried out. The construction is based on the steel pile horizontal sheet pile construction method, which uses wooden planks as the horizontal sheet piles.

However, when implementing the steel pile horizontal pile construction method on soft ground, it is not possible to prevent water leakage and soil outflow from the gaps between wooden horizontal piles, steel piles, and wooden horizontal piles. In order to stabilize the ground and stop water, various auxiliary methods such as chemical injection methods have been used.

Therefore, a great deal of expense and time is required to retain earth at discontinuous locations of steel sheet piles caused by underground objects, etc.

In order to solve these problems, the present invention is a steel plate for earth retaining that is used in a construction method (see Japanese Patent Application No. 130289/1989) in which a steel plate is press-fitted using a hydraulic jack before excavation to form earth retaining. Its features include a U-shaped retaining part at the bottom of the steel plate, and uneven parts on both left and right ends for applying a water sealing agent, which improves water sealing between the steel plates or between the steel sheet piles and the steel plates. It is something that

The drawings will be explained in detail below.

Figures 1 and 2 are examples of the present invention. Figure 1a is a plan view of a steel plate for earth retention, and b is a side view.In the figure, 1 is a steel plate, usually about 2m long and 20cm high. Thicknesses of about 12 to 16 mm are used.

Reference numeral 2 denotes an engaging part for engaging the steel plates with each other, for example, horizontal members 5, 5 are fixed to both the front and back surfaces of the lower part of the steel plate 1 so as to protrude from the lower end of the steel plate 1 and form a U-shape. Configure.

3 is an expanded metal welded to the steel plate 1 at uneven portions provided on both the front and back sides of the left and right ends of the steel plate 1 to prevent the water sealing agent from peeling off and dissipating.

The number 7 in the figure indicates the welding point.

The uneven portion may be formed by welding a punched steel plate 31 as shown in FIG. 2A, or by cutting lattice grooves 32 into the steel plate body as shown in FIG.

Reference numeral 4 denotes a band-shaped sealing material, for example, a band-shaped rubber material commercially available under a trade name such as LS Sealant is bonded over the entire length of the lower end face of the steel plate 1.

FIGS. 3 and 4 are examples of the use of the present invention, and show the earth retention situation at discontinuous locations of steel sheet piles using the present steel plate.

6 is a guide pile, 7 is a buried object, and 8 is a jack.

Unlike conventional wooden horizontal sheet piles, this upper sound board is made of steel, which allows it to be press-fitted sequentially from directly below the buried pipe using hydraulic jacks, etc., and is commonly used as earth retaining at discontinuous locations of steel sheet piles. This eliminates the need for the complicated manual insertion of horizontal sheet piles into steel piles, as is the case with the steel pile horizontal sheet pile construction method that involves ground improvement, and the retaining wall can be formed in advance before excavation.

FIG. 4 shows the secured state of the steel plates, in which a is a front view and b is a plan view.

A water stop agent such as a swelling water stop agent that swells when it comes in contact with water (for example, Pile Lock) is applied to the uneven parts on both the left and right ends of the steel plate 1, and the parts are press-fitted so that they fit into the grooves of the guide piles 6. This ensures that the steel plate 1 and the guide pile 6 have watertight properties.

Since both ends of the steel plate are uneven, the applied water stop agent is less likely to dissipate and can be applied in an appropriate amount.

In addition, the upper part of each steel plate fits into a retaining part provided at the lower part of the upper steel plate, and a sealing material is bonded to the entire length of the lower end surface of the steel plate, so the water-tightness between each steel plate is good.

As a result, water leakage and earth and sand outflow can be completely prevented in the earth retention section.

As explained above, in this invention, the horizontal sheet piles are made of steel, which allows them to be press-fitted into the ground using hydraulic jacks, etc., and the complicated insertion of horizontal sheet piles by making a large groove into an excavated groove in the conventional steel pile horizontal sheet pile construction method is possible. No work is required, earth retaining walls can be built safely in advance before excavation, and since it has a water-stopping function, this invention can be used for earth retaining at discontinuous locations of steel sheet piles, which is currently increasing in number. , its economic effects are extremely large.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the invention, a is a plan view, b is a side view, Fig. 2 is a partial view of another embodiment of the invention, and Figs. 3 and 4 are diagrams of the invention. Fig. 3 is a perspective view showing the earth retaining condition at a discontinuous location of the steel sheet pile, and Fig. 4 shows the retaining condition of the steel plate. 1... Steel plate, 2... Engaging portion, 3...
... Uneven portion, 4... Seal material, 5...
・Horizontal member, 6... Guide pile, 7... Buried object, 8... Jacket.

Claims (1)

[Scope of utility model registration request] A U-shaped retaining part 2 is provided at the lower part of the steel plate 1, and uneven parts 3 are provided on the front and back surfaces of both left and right ends of the steel plate 1, and a water stopper is applied thereon, and a band-shaped seal is applied to the entire length of the lower end surface of the steel plate 1. A steel plate for earth retaining, characterized in that the plate 4 is glued and hollowed.