Construction method of subway station steel pipe pile

Abstract

The invention discloses a construction method of a subway station steel pipe pile. The construction method comprises the following steps of S1, pilot tunnel hardening and leveling; S2, pile position fixing and hole opening; S3, steel pipe pile coring; S4, drilling, specifically, after coring is completed, a crawler-type drilling machine is adopted for drilling, in the drilling process, the flatness of a drilling machine and the perpendicularity of an active drill rod are checked, a drill bit and a drill rod connector are checked regularly, low-speed and low-pressure drilling needs to be conducted during drilling, and the perpendicularity is controlled by arranging a drop hammer on a drill arm; S5, primary hole cleaning; S6, hole depth measuring, and hole detecting; S7, steel pipe placing; S8, grouting pipe hoisting and placing; S9, sinking-checking thickness checking; S10, concrete pouring; S11, pile splicing and pouring, and installing longitudinal bars at the top of the pile; and S12, pile bottom post-grouting. The problems that the drilling perpendicularity does not meet the design specification requirement, the sediment thickness is difficult to control and the steel pipe pile concrete is not compact enough are solved.

Description

technical field [0001] The invention relates to the technical field of subway engineering, in particular to a construction method of steel pipe piles in subway stations. Background technique [0002] The following problems exist in the construction of steel pipe piles in subway stations: 1. The drilling rig is uneven, the gap between the drill pipe joints is too large, and the drilling pressure is too high, which may easily cause the verticality of the drilling to fail to meet the requirements of the design specifications; 2. The time required to remove the drill pipe and hoist the steel pipe 3. The steel pipe pile is a load-bearing component in the structure, and the quality of the concrete is related to the safety and stability of the entire structure. Due to the small section of the pilot tunnel and the limitation of the working space, it is difficult to guarantee the construction quality of the steel pipe pile concrete. Contents of the invention [0003] The purpose o...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a construction method of steel pipe piles in subway stations, to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions

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