JPS61191725A - Stress material drawing work - Google Patents

Abstract

PURPOSE:To simply and quickly remove out steel sheet piles by a method in which a steel sheet pile consisting of an upper steel sheet pile and a lower steel sheet pile is driven, and the upper steel sheet pile is drawn out when embedding the ground after an underground structure is constructed. CONSTITUTION:The lower end of an upper steel sheet pile 5 is fitted into a plate 2 provided to the upper end of a lower steel sheet pile 1 and the piles 1 and 5 are integrated with bolts 7 and nuts 4. The sheet piles so integrated are driven into the ground 9 to form a sheathing wall, and the ground within the sheathing wall is excavated and an underground structure 11 is constructed. The ground is embedded to the connected portion 12 of the sheet piles, the bolts 7 are removed out, the area to the ground's surface is embedded, and the upper steel sheet pile 5 is pulled out. The stress material consisting of the piles 1 and 5 can thus be easily and quickly removed out, and the piles can also be used as sheathing wall until construction work is completed.

Description

[Detailed description of the invention] In the earth retaining method for excavation construction, steel sheet piles and H steel piles are used as stressed steel materials, and when the stressed materials exceed 20 m, they are buried even though they are no longer needed after the construction is completed. Currently, this is because no economical method has been found to pull out stressed materials, but it is now required to pull them out and remove them after construction is completed.

This is done not only to conserve resources and cut costs, but also because it has become difficult to permanently occupy underground areas of public and private land.

For example, in the case of subway construction, etc., after completing the construction of an underground structure by applying earth retention with stress materials and excavating the ground, it is temporarily backfilled to the ground so that work or passage can be carried out on the upper part, and work is continued until the entire structure is completed. This involves the double and triple effort of removing and reburying.

The present application is an invention relating to a method for pulling out stressed materials, which is intended to enable easy and quick removal of nests without such trouble, and to allow the stressed materials to be used as earth retaining walls until the work is completed. .

To explain the example now, a plate (2) is fixed to the inner and outer surfaces of the upper end of one of the two stress members (hereinafter referred to as the lower steel sheet pile) (11) by welding, and the lower steel sheet pile (11 Bolt insertion holes (3
) (411!: Weld, nut (
Make sure that the female screw hole (4) and the bolt insertion hole (3) match.

A bolt insertion hole (6) that matches the bolt insertion hole (3) drilled in the plate (2) is bored in the lower part of another stress member (hereinafter referred to as the upper steel sheet pile) (5). .

That is, when the upper steel sheet pile (5) is butted against the upper part of the lower steel sheet pile (1) and added, the bolt insertion hole (3) of the plate (2)
) A bolt insertion hole (6) is drilled at a location that matches the hole.

In the present application, the lower end of the upper steel sheet pile (5) is fitted into the plate (2) provided at the upper end of the lower steel sheet pile (1) having the above structure, and the bolt insertion holes (3) and (6) are aligned so that the bolts (7) ) and screw the bolt (7) onto the nut (4). After constructing the underground structure u1) in this way, the upper and lower steel sheet piles (8
), remove the bolts (7), and then completely backfill to the ground surface q3.

After it is completely backfilled, the steel sheet pile (5) can be removed to a specified depth by pulling out the upper steel sheet pile (5) using a crane, so there will be no hindrance to the subsequent construction of the upper structure or the installation of gas or water pipes. It does not cause any damage.

As described above, in this application, an earth retaining wall is formed using stressed materials that are connected and integrated with "'C bolts and nuts" in the middle of the longitudinal direction, and an underground structure is constructed within the earth retaining wall and backfilled up to the connecting part of the stressed materials. After that, the bolts fixing the upper stressed material are removed and the inside of the earth retaining wall is returned to the ground surface again, and then the upper stressed material is pulled out, so the desired purpose can be achieved well. It is something.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the upper and lower steel sheet piles, Figure 2 is a front view of the main parts, Figures 3 and 4 are vertical and cross-sectional views of Figure 2, and Figure 5 is a view of the retaining wall. A plan view of the ground on which the construction was built, and Figure 6 is a vertical cross-sectional view of the ground.

Claims (1)

[Claims] (1) Form an earth retaining wall using stressed materials connected and integrated with bolts and nuts in the middle of the longitudinal direction, construct an underground structure within the earth retaining wall and backfill up to the joint of the stressed materials, and then A stress material extraction method characterized by removing the bolts fixing the stress material, backfilling the inside of the earth retaining wall to the ground surface, and then pulling out the stress material at the top.