Bored pile construction process

Abstract

The invention discloses a bored pile construction process which includes the steps: 1) drilling a bored pile hole; 2) weaving a reinforcement cage; 3) hoisting the reinforcement cage; and 4) casting concrete. The reinforcement cage comprises main reinforcements and a hoop reinforcement, wherein the main reinforcements are vertically encircled into a cylinder, and the hoop reinforcement is strapped on the main reinforcements. The reinforcement cage is provided with a steel screen surrounding the main reinforcements, and the thickness of the steel screen is 2mm, the specification of a mesh of the steel screen is 10mm*10mm. In the bored pile construction process, by the aid of the steel screen, lateral pressure of a pile body on a hole wall in pile-forming concreting is decreased, accordingly, the bearing capacity of a protecting wall is relatively increased, and the risk of concrete loss due to squeezing breakage of the protecting wall caused by breakthrough of the critical point of the lateral bearing capacity of the protecting wall is decreased.

Description

technical field [0001] The invention relates to a construction technology of bored piles. Background technique [0002] When pouring concrete in the reinforced cage of bored cast-in-situ piles in the prior art, when the concrete pouring height reaches more than 2 / 3 of the hole-forming depth, the phenomenon of concrete and mud loss occurs. The analysis shows that the specific gravity of concrete is far greater than that of mud. After the concrete is poured to a certain height, the lateral pressure of the concrete's own weight exceeds the critical point of the lateral bearing capacity of the retaining wall at the position of the cave, and the concrete breaks through the formed retaining wall, resulting in the loss of concrete and mud. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a construction technique for bored piles, which can avoid concrete crushing and forming retaining walls. [0004] In order to solve th...

AI Technical Summary

Problems solved by technology

[0002] When pouring concrete in the reinforced cage of bored cast-in-situ piles in the prior art, when the concrete pouring height reaches more than 2 / 3 of the hole-forming depth, the phenomenon of concrete and mud loss occurs. The analysis shows that the specific gravity of concrete is far greater than that of mud. After the concrete is poured to a certain height, the lateral pressure of the concrete's own weight exceeds the critical point of the lateral bearing capacity of the retaining wall at the position of the cave, and the concrete breaks through the formed retaining wall, resulting in the loss of concrete and mud

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