Recyclable double-layer steel sleeve for static load test of cast-in-situ bored pile and method

Abstract

The invention relates to a recyclable double-layer steel sleeve for a static load test of a cast-in-situ bored pile and a method. Rubber waterstops are arranged at the top ends and the bottom ends of double sleeves, and sealing materials are arranged in the upper sections and the lower sections of the double sleeves to serve as temporary fillers. Four special-shaped lifting lugs are welded to the inner sleeve bodies and the outer sleeve bodies at the top ends of the double sleeves. An auxiliary steel lifting lug is mounted at the downward 2 / 3 positions of the tops of the double sleeves. The method comprises the following steps that (1), the recyclable double-sleeve structure is designed; (2), the recyclable double sleeves are assembled and combined; (3), the recyclable double sleeves are hoisted and mounted; and (4) the outer sleeve is disassembled and recycled after the static load test is completed. The problem that slurry and concrete enter the pipe wall of a traditional double-sleeve pipe due to the fact that the top of the traditional double-sleeve pipe is open and the problem that the double-sleeve pipe is fixed to an orifice of a cast-in-situ bored pile after being mounted are solved, and the outer sleeve pipe can be recycled after the test is completed.

Description

technical field [0001] The invention relates to a construction and detection device for bored cast-in-situ pile test piles, in particular to a cast-in-place pile test pile device for construction projects. Background technique [0002] As urban construction land becomes more and more scarce, large-scale urban complexes, important transportation hubs and other buildings develop deeper and deeper underground spaces, and ultra-deep basements are becoming more and more common. [0003] Considering the accuracy requirements of the static load test of cast-in-place piles, in order to calculate the bearing capacity of cast-in-place piles more accurately and ensure that the pile foundation design tends to be perfect and economical, double casings are often set above the excavation surface of the cast-in-place pile static load test piles The device facilitates the most accurate and ideal effect of the data obtained during the pile foundation static load detection process. [0004] C...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of processing, making, manufacturing, installing and fixing the double casing method of conventional cast-in-situ piles, the variability of the inner and outer casings, the easy failure of the casing after installation, and the high construction cost, and provides a recyclable drill Double-layer steel casing for static load test of cast-in-place pile and its processing and installation method

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