Improvement method for mounting process of long pile casing of cast-in-situ bored pile

Abstract

The invention discloses an improvement method for a mounting process of a long pile casing of a cast-in-situ bored pile. The improvement method comprises the following steps: step S1, manufacturing the pile casing; s2, hole site drilling is carried out; s3, a pile casing is hoisted and placed; s4, hydraulic cylinder expanding is carried out; and S5, the pile casing is installed in place. By improving the mounting process of the long pile casing of the cast-in-situ bored pile, no vibration is generated in the mounting process of the pile casing, the whole process is mute, the adverse effects of vibration and noise on the surrounding environment and the existing structure are avoided, and the construction method has the advantages that the construction range is located in an urban residential area or near important buildings with high requirements for vibration, and the construction cost is reduced. And the method has high applicability.

Description

technical field [0001] The invention relates to the technical field of bored pile construction, in particular to an improved method for installing a long casing of bored piles. Background technique [0002] During the construction of bored piles, a casing is often buried to locate the bored pile, usually a steel casing. Its main functions are: (1) fixing the pile position and guiding the drilling direction; Isolate the surface water to prevent it from flowing into the well hole and prevent the ground stones from falling into it; (3) Control the elevation of the pile top; (4) Protect the hole from collapsing, and ensure that the mud water level in the hole is higher than the groundwater level or the construction water level to a certain height, forming Hydrostatic pressure to protect the hole wall from collapsing. [0003] For the construction conditions where the borehole depth of the cast-in-place pile is deep and the geological conditions of the upper soil layer are weak,...

AI Technical Summary

Problems solved by technology

[0004] Vibration hammer is used to vibrate the casing. During the vibration sinking process, the noise pollution of vibration equipment is serious, and the vibration may have adverse effects on existing buildings, or buildings and foundations under construction, especially in cities and surrounding environments. Under complex conditions, the influence is greater and the applicability is poor

In addition, it is generally necessary to drill to a certain depth in advance before installing the long casing. The pile hole has formed a deep hole pile. The process of vibrating and sinking the casing will disturb the surrounding stratum, which will easily cause hole collapse in the weak stratum.

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