Double-casing zero-friction static load detection construction method based on uplift pile

Abstract

The invention discloses a double-casing zero-friction static load detection construction method based on an uplift pile. The double-casing zero-friction static load detection construction method is used for welding steel bars at the top of a foundation pit and installing detection equipment, secondary transportation of material equipment is reduced, and the construction efficiency is improved. Thedouble-casing zero-friction static load detection construction method specifically comprises the steps that (1) surveying and setting out are conducted, specifically, before the uplift pile is drilled, a total station is used for placing pile position points, and the pile position setting-out error is within the range required by the specification; (2) a drilling machine is in place, specifically, the drilling machine is moved in place, sole timber is laid under a base, the drilling machine is kept stable, and a drill rod is vertical; (3) a 1.5m pile hole is drilled; (4) a 1.5m steel casing is installed; (5) a 1.2m pile hole is drilled; (6) a 1.2m steel casing is installed; (7) hole cleaning is conducted, specifically, after the 1.2m steel casing is installed, hole bottom cleaning is conducted on the uplift pile formed hole, diluted slurry meeting the requirements is injected from the hole bottom through a guide pipe, and circulation is conducted; (8) a steel reinforcement cage is installed; (9) concrete is poured; and (10) the uplift resistance of a pile body is detected.

Description

technical field [0001] The invention relates to the technical field of subway construction, in particular to a construction method for zero-friction static load detection of double casings based on uplift piles. Background technique [0002] With the continuous development of urban construction in our country, more and more cities are accelerating the construction of subways. During the construction of subway stations, in order to ensure the orderly progress of the project, it is necessary to carry out static load testing on basic uplift piles. [0003] In the existing scheme, the static load test of the uplift piles is carried out at the bottom of the foundation pit after the excavation to the bottom. When the static load test of the uplift piles is carried out at the bottom of the foundation pit, since the foundation pits are all supported by steel supports, the distance between the steel supports is relatively long. Short and narrow space, it is very difficult to hoist th...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to solve the impact on the construction period of the main body during the static load test of the uplift pile at the bottom of the foundation pit

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