Construction method for reducing soil squeezing effect of pile group

Abstract

The invention relates to the technical field of pipe pile construction methods, in particular to a construction method for reducing the soil squeezing effect of a pile group. The construction method for reducing the soil squeezing effect of the pile group comprises the following steps of S1, measuring the positions of an isolation ditch and a steel sheet pile between a pile group construction area and an external building area; S2, driving the steel sheet pile into the ground; S3, digging the isolation ditch; S4, drilling a plurality of stress release holes at the bottom of the isolation ditch, and immersing a vibration isolation assembly in each stress release hole; and S5, carrying out construction on the pile group construction area. According to the construction method for reducing the soil squeezing effect of the pile group, vibration wave transmission and surface upheaval caused by static pressure pile sinking of a pipe pile are effectively weakened through the isolation ditch; the stress release holes are matched with the vibration isolation assembly to isolate surrounding soft soil vibration and thixotropy caused by pipe pile sinking, horizontal and vertical displacement of soft soil is reduced, and excess pore water pressure generated in the soft soil is discharged; the steel sheet pile can block residual vibration of the stress release holes and refract and return vibration waves, so that sensitive buildings are protected.

Description

technical field [0001] The invention relates to the technical field of construction methods of pipe piles, in particular to a construction method for reducing the soil squeezing effect of group piles. Background technique [0002] In the current construction of infrastructure such as civil engineering, prestressed high-strength concrete pipe piles (PHC pipe piles) are widely used in building foundation treatment. This type of pile has low engineering cost, high pile-forming efficiency, and low construction noise. And no mud environmental pollution and other characteristics. However, in coastal soft soil foundations, due to the characteristics of high compressibility, low permeability, high thixotropy and fluidity of soft soil, when PHC pipe piles are piled in soft soil foundations, due to soil disturbance around the pipe piles, soil The damage caused by the movement of the pile, the uplift of the surrounding soil, and the increase of the pore water pressure in the soil all ...

AI Technical Summary

Problems solved by technology

But for the soft soil foundation with high water content, high thixotropy and fluidity, the effect of this treatment is not ideal, because the soil pressure and excess pore water pressure in the soft soil caused by pile sinking increase, and the dissipation is not timely, and the soil creeps. This will lead to vertical uplift and horizontal displacement of the soil around the pile

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