A vertical adjustment method for integrated construction of steel pipe columns

Abstract

The invention discloses a steel pipe column integrated construction verticality adjusting method. The center point of a steel pipe column is placed at a vault of a small pilot drift by a total station, and pile longitudinal axes are put on the side walls of both sides of the pilot drift; before installing the steel pipe column, a positioning cross wire is installed at a lower opening of the bottommost section of the steel pipe column, and a high-strength PE wire is tied at the center point; after the steel pipe column is installed, the high-strength PE wire is led from the interior of the steel pipe column to the center point of the pile position of the vault, the wire is straightened, and it is ensured that the two points are in a straight line; then a positioning cross wire is installedat a flange of an upper opening of the top section of the steel pipe column, then the longitudinal axis on which the pile position is located is pulled, and the center point of the pile position on the longitudinal axis is positioned with the total station; and finally, the position of the steel pipe column is adjusted by a chuck to enable the four points of the center of the column bottom, the center of the column top, the center of the longitudinal axes and the column center of the vault to be in a straight line, so that the verticality of the steel pipe column can be ensured and the accurate construction location of the steel pipe column can be ensured. The steel pipe column integrated construction verticality adjusting method eliminates multiple traditional processes such as pumping and draining pile hole mud, steel casing and manual positioner installation down the hole, thereby improving construction safety; and construction cost is reduced, and construction efficiency is improved.

Description

technical field [0001] The invention relates to an engineering construction technology, in particular to a vertical adjustment method for integrated construction of a steel pipe column. Background technique [0002] In recent years, with the improvement of municipal facilities, the improvement of the quality of life and the improvement of the environment, the new subway stations in the central area of ​​the city have basically no open, cover and excavation construction conditions, and the newly built subway stations mostly use the hole pile method ("PBA") It was built by underground excavation. At present, there are few studies on the construction sequence of underground excavation stations built by hole pile method, differential settlement of steel pipe columns in underground excavation stations and their impact on structures, and systematic research is needed. [0003] At present, the commonly used installation of steel pipe columns in underground excavation stations most...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in the field of installing the locator on the top of the pile, the steel pipe column is manually drilled into the hole, which is a limited space operation, and the safety is poor

The height of overfilled concrete is not easy to control, and it takes a long time to chisel out overfilled concrete

It is difficult to verify the installation quality of the positioner, it is difficult to guarantee the verticality of the steel pipe column, the process is cumbersome, and the construction efficiency is low

In the field of hydraulic vertical insertion technology, the HPE vertical insertion machine equipment is too large and can only be constructed on the surface, and cannot be used in a narrow space (such as a pilot tunnel)

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