Construction method for forming underground diaphragm wall by adopting interlocking concrete precast piles

Abstract

The invention discloses a construction method for forming an underground diaphragm wall by adopting interlocking concrete precast piles. The construction method comprises the following steps of: mounting a precast first positioning guide plate, wherein first arc-shaped convex blocks which are matched with first arc-shaped grooves of a parallel adjacent rectangular pile and can slide relative to the first arc-shaped grooves are arranged on one side of the first positioning guide plate, and the shape and the size of the first positioning guide plate are the same as those of the cross section ofa rectangular pile; performing positioning with a positioning guide frame. In the synchronous sinking process of a drill rod and the rectangular pile, the front side and the rear side of the rectangular pile are always in rolling fit with rollers, the first arc-shaped grooves in the left side of the rectangular pile are always in rolling fit with balls, and first arc-shaped convex blocks of the first positioning guide plate at the lower end of the right side of the rectangular pile are always in sliding fit with the first arc-shaped grooves of the parallel adjacent rectangular pile, therefore,the positioning precision and perpendicularity of the rectangular pile are ensured until the rectangular pile sinks to a preset position. According to the construction method, the positioning precision of the parallel adjacent piles is high, the perpendicularity of upper and lower piles is good, and the construction efficiency is relatively high.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for forming an underground continuous wall by using interlocking concrete prefabricated piles. Background technique [0002] The interlocking concrete prefabricated pile is a pre-tensioned prestressed concrete hollow rectangular pile with a rectangular outer contour, two arc-shaped grooves on the left and right sides, that is, a semi-elliptical groove, and is formed by a centrifugal process, that is, a square pile or a rectangular pile. pile. The elliptical hole formed by closing the arc-shaped grooves of the two piles is the water-stopping hole, and the water-stopping glue or water-stopping slurry is injected into the water-stopping hole. The continuous row construction of interlocking concrete prefabricated piles can form a continuous wall underground, which can be used as a temporary and permanent wall. Soil-retaining, water-stopping, load-...

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Problems solved by technology

[0005] However, the current mid-dug construction method still has the following deficiencies: the row-by-row construction of interlocking concrete prefabricated piles needs to form a smooth wall surface, but the positioning accuracy of adjacent piles and the verticality of the upper and lower piles in the construction of interlocking concrete prefabricated piles in the prior art It is still difficult to ensure that the flatness of the underground diaphragm wall is still unsatisfactory, and the construction efficiency is not ideal; Then put another auger drill pipe in the center hole of the upper prefabricated pile, and then use a crane to lift the upper section prefabricated pile with the auger drill pipe inside and make it vertical, and then connect the auger drill pipe with the upper power head Fastening, obviously, this operation method is time-consuming and laborious, which greatly increases the labor intensity of the operator, reduces the construction efficiency, and easily affects the verticality of the auger drill pipe

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