JPS62291329A - Method and apparatus for drop-in sheathing work - Google Patents

Abstract

PURPOSE:To easily support a sheathing wall by a method in which an integrated set of sheathing plates and shore struts is dropped into a trench. CONSTITUTION:Sheathing plates 1 formed of a light metal sheet, etc., are stacked up and combined with each other in mutually fitted in the manner that each sheet does not come down and expandiable shore struts 2 are integrally attached between the left and right-handed sheathing plates 1. They are dropped into an excavated trench and fixed by stretching the struts 2. Since the sheathing wall can be supported only by adjusting the struts 2, the sheathing work can be attained easily and quickly.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention mainly relates to an earth retaining method for shallow trenches and equipment used in this method.

[Conventional technology]

Conventionally, in order to provide earth retaining for shallow trench excavation, wooden or steel sheet piles were applied to the old front surface and pressed round with logs or shavings.

[Problem that the invention seeks to solve]

In the case of wooden sheet piles, the conventional construction methods are labor-intensive and wasteful because the materials are all disposable, or even if they are used repeatedly, they are used only a few times, and on-site processing is required during construction. Steel sheet piles are heavy, so construction efficiency is not very good.

[Means for solving problems]

The purpose of the present invention is to eliminate the above-mentioned waste, and to make it fireproof and suitable for repeated use.
Moreover, the object is to obtain an earth retaining method and device that is lightweight and highly efficient.

Therefore, in the present invention, earth retaining plates formed of light metal or the like are sequentially stacked and connected in a fitted state where the upper and lower sides do not shift inward, and the combined upper and lower left and right earth retaining plates I
・A retractable stub is attached to the stub to form a body between the retaining plate and the stub, which is then dropped into the retaining wall of a thinly cut groove and the stub is stretched and fixed.

〔Example〕

First, each component of the apparatus used in the method of the present invention will be explained. In the figure, 1 is a retaining plate, and 2 is a cutout. The retaining plate 1 is made of a horizontally elongated hollow plate made of aluminum with a V-shaped groove 3 formed on the lower edge and a ■-shaped protrusion 4 formed on the upper edge, and internally reinforced 5, and the stub 2 has a turnbuckle. In the formula, reverse-threaded screws 2b and 2c protrude from the left and right sides of the rotating member 2a, and a stator 7 to the connecting fitting 6 is attached to the tips of the screws 2b and 2c.

In addition, a ■-shaped protrusion is provided on the lower edge of the plate 1, and a V-shaped protrusion is provided on the upper edge.
Even if a shape groove is formed, there is no difference.

Two retaining plates 1 are stacked one on top of the other and welded to a column 8, and the column 8 is a plate adjacent to a channel portion 8a into which a mouth-shaped portion 6a formed on a connecting fitting 6 is fitted, as shown in FIG. and a distance adjusting plate portion 8b. The stator 7 is fixed to the mounting portion 6a of the connecting fitting 6 with bolts.

To retain earth in a thinly cut shallow trench, lower the earth retaining plate, press the stub 2, and press both the left and right earth retaining plates against the earth retaining wall.

〔Effect of the invention〕

According to the present invention, the earth retaining wall can be supported by dropping the integrated earth retaining plate and cutting beam into the excavation groove and adjusting the turnbuckle type cutting beam, so construction can be easily and quickly carried out. be exposed.

In addition, since the earth retaining plates fit securely at the top and bottom of the device, there is no risk of them shifting after construction.

Each component can be removed and used any number of times after installation.

[Brief explanation of drawings]

The drawings show a line of equipment for carrying out the drop-in earth retention method according to the present invention. Figure 1 is a perspective view, Figure 2 is a vertical sectional view, Figure 3 is a front view of the earth retention plate, and Figure 4 is a plan view,
Figure 5 is a cross-sectional view taken along the line A-A' in Figure 3, Figure 6 is an enlarged cross-sectional view, and Figure 7 shows the connection between the connecting columns welded to both ends of the retaining plate and the connecting fittings at both ends of the stub. Plan, No. 8
The figure is a front view of the cutting beam, and FIG. 9 is a plan view of a part thereof. 1. Retaining plate 2. Cut bar 3. V-shaped groove 4.
・V-shaped protrusion 6 Connecting metal fitting 7 Stator 8 ・Column patent applicant Nitto Iron Works Co., Ltd. Agent Hide Tsuchihashi 1,
. Tsuyoshi Eto fsi
Figure 2 Figure 6!3 λ Procedural amendment (voluntary) April 28, 1988

Claims (2)

[Claims] (1) Retaining plates made of light metal, etc., are stacked one on top of the other in a fitted state where the top and bottom do not shift inward, and are joined together, and extensible stubs are attached to the joined upper and lower left and right retaining plates. A drop-in earth retaining method in which the plate and cut beam are integrated, and the cut beam is stretched and fixed within the earth retaining wall of the excavated trench. (2) It consists of a retaining plate made of light metal, etc., and a stub that extends the retaining plate on the left and right sides of the retaining wall. The other end is a concave groove that fits into the protrusion, and the cut beam is expandable and retractable in a turnbuckle type.