Supporting article for preventing sand from subsiding

Abstract

Retaining supporting is provided to reduce water pollution caused by coffering work and to increase economical effects, by achieving a coffering effect by a closed space. In retaining supporting, a steel pipe sheet-pile(1) is used as a supporting unit member. In the steel pipe sheet-pile, steel pipes(2) arranged parallel are integrally interconnected by an H-steel connection member(4) the edges of which are combined to the peripheral surface of each steel pipe and a connection part(3) is arranged to the steel pipe. The supporting unit members are horizontally connected by mutually combining the connection parts, to form a retaining wall. Supporting unit members vertically arranged are interposed at suitable intervals to make the connection members and steel pipes arranged in the rear of the retaining wall.

Description

technical field [0001] The present invention relates to a sand-collapse-prevention support used for cofferdam construction with steel pipe sheet piles and for preventing excavated soil and sand collapse when constructing structures in water. Background technique [0002] As the anti-sand collapse support for cofferdam engineering and soil retaining and anti-sand collapse equipment, it is described in the following patent document 1, as Figure 8 ~ Figure 1 As shown in 0, the steel pipe sheet pile 1 forms joints 3 on the left and right peripheral sides of the steel pipe 2, and connects them sequentially by connecting the joints 3 . In addition, there are various combinations of the shape of the joint 3 such as a box shape and a T shape, a mutual C shape, a C shape and a T shape, and an example thereof is shown in the figure. [0003] Patent Document 1: Japanese Patent Publication No. 4-63167, [0004] Patent Document 2: JP-A-2000-220135. [0005] In addition, although the a...

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Problems solved by technology

[0018] Although there is no need for muddy water treatment, the discharged soil is less than the sand-proof subsidence construction method of pouring into reinforced concrete in other cases. The soil-mixed cement cast-in-place concrete pile with high economical efficiency has a short construction period and a sand-proof subsidence wall, but the single soil-mixed cement The cast-in-place concrete pile sand prevention wall is insufficient in strength and rigidity independent of the soil and sand pressure, and the quality of the sand collapse prevention wall cannot be expected to be stable.

[0019] In addition, in the steel pipe sheet pile caisson foundation construction method, when the excavation depth is deep and the soil and sand pressure acting on the steel pipe sheet pile is high, it is necessary to fully study the arrangement of the cut beams installed in the caisson and the support piles that support them. It takes time and effort to plan and use part of the steel pipe sheet piles in the caisson as intermediate support piles in conventional

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