Method for accurately controlling pile top elevation of CFG pile

Abstract

The invention discloses a method for accurately controlling the pile top elevation of a CFG pile. The method comprises the following steps that 1, field data are collected, wherein the field data comprise the ground elevation, drill stem length of a CFG drilling machine and drill stem internal diameter of the CFG drilling machine; 2, idle drilling data are figured out, specifically, the collected field data are processed, and the depth S from a drill bit to the ground during idle drilling is determined; 3, the drilling stop position and the drill pipe interior concrete supply stop height position are marked on a vertical rod of the CFG drilling machine through fluorescent strips; 4, a line pendulum is suspended at the top end of a main drill stem of the CFG drilling machine, the CFG drilling machine is adjusted to allow the main drill stem to be parallel to the line pendulum, a leveling instrument is installed on a console of the CFG drilling machine, and a bubble of the leveling instrument is made to be located in the center; 5, the drilling machine is in place, and the levelness of the CFG drilling machine is adjusted to enable the bubble of the leveling instrument to be located in the center position; 6, drilling and pile forming are performed, specifically, drilling is stopped till the drilling stop position mark, concrete is pumped, the drill stem is lifted, and concrete pumping is stopped till the drill pipe interior concrete supply stop position; and 7, the drill stem is lifted, and thus construction of the CFG pile is completed.

Description

technical field [0001] The invention relates to a method for precisely controlling the height of CFG pile tops, belonging to the technical field of building construction. Background technique [0002] In foundation reinforcement construction, CFG piles have been widely used as a common foundation reinforcement measure. For structures such as culverts, frame bridges, and retaining walls, CFG piles are usually constructed after foundation pit excavation is completed. However, such construction The method is usually affected by the depth and size of the foundation pit, and the pile length cannot be accurately controlled, which is prone to problems such as the pile head is too long and needs to be cut twice, and the pile length is not enough to connect piles, which affects the construction progress and increases the construction cost. . Therefore, choosing a CFG pile construction method that can not only speed up the construction progress, but also reduce the construction cost ...

AI Technical Summary

Problems solved by technology

[0002] In foundation reinforcement construction, CFG piles have been widely used as a common foundation reinforcement measure. For structures such as culverts, frame bridges, and retaining walls, CFG piles are usually constructed after foundation pit excavation is completed. However, such construction The method is usually affected by the depth and size of the foundation pit, and the pile length cannot be accurately controlled, which is prone to problems such as the pile head is too long and needs to be cut twice, and the pile length is not enough to connect piles, which affects the construction progress and increases the construction cost.

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