Precise steel latticed column mounting method applied to foundation pit support engineering

Abstract

The invention relates to a precise steel latticed column mounting method applied to foundation pit support engineering. The precise steel latticed column mounting method comprises the following steps:determining a straight line: drawing a line or pulling a rope on ground along a pile hole position of a filling pile; determining a direction: pressing a compass onto the straight line, superposing acompass pointer with the straight line, and recording the direction to which the compass pointer points; mounting a calibration part: placing the calibration part on the top of a steel sheath for filling pile construction, enabling at least one side of the calibration part to fit to one outer side wall of a steel latticed column, fitting the compass to the side, superposing the compass pointer direction with the side, rotating the calibration part and the compass until the direction pointed by the compass pointer is a recorded direction, and fixedly connecting the calibration part to the topsurface of the steel sheath; hoisting the steel latticed column; rotating the bottom of the steel latticed column by referring to the calibration standard, and slowly dropping the steel latticed column into the steel sheath; pouring concrete; and dismounting the calibration part. The precise steel latticed column mounting method has the effect that the mounted steel latticed column is not liable to tilt.

Description

technical field [0001] The invention relates to the technical field of installation of steel lattice columns, in particular to a precise installation method of steel lattice columns applied in foundation pit support engineering. Background technique [0002] Today, with the rapid development of society, the level of science and technology is becoming more and more advanced, and the city is constantly expanding. There are more and more super high-rise complex buildings integrating office, shopping and life, and the depth and scope of foundation pits are also increasing. The larger the foundation pit depth and the complexity of the geological environment, the more difficult and stricter the construction of the foundation pit support project will be. [0003] A Chinese patent with a publication number of CN109083187A discloses a new type of tower crane foundation construction method, including: A. Determination of the construction plan, determination of the buried depth of the ...

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions have the following defects: in the same project, multiple cast-in-situ piles are arranged horizontally or vertically, so there must be some steel lattice columns on a straight line, and the distance between adjacent steel lattice columns The space between them is generally about 10 meters long. During the process of pre-embedding the steel lattice columns on the upper part of the cast-in-place piles, when the staff hoist the steel lattice columns, the installation direction of the steel lattice columns is difficult to determine with the naked eye. All steel lattice columns may be skewed. Since the steel lattice columns are of square structure, the same sides of multiple steel lattice columns on the straight line are often not on the same plane or not parallel (such as figure 1 As shown), although it will not affect the supporting function of the steel lattice column itself, people can easily find that the steel lattice column on the straight line is installed crookedly with the naked eye, and the visual effect is poor, which affects the acceptance and inspection experience. It may also give people an illusion of poor construction quality, so it needs to be improved

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