Numerical Analysis of Soil Squeezing Effect of Pipe Pile Construction in Deep Silt Site

Abstract

This article is based on a pile foundation project in Wenzhou City, combined with construction site monitoring data, and established a finite element model to analyze the soil squeezing displacement caused by the construction of PHC pipe piles in deep silt sites, as well as the displacement of different sizes of digged holes on the surface impact. When the distance from the pile position to monitoring point is 35 times of the pile diameter, the field test results show that the horizontal displacement and velocity change of the soil caused by the pile foundation construction decrease with the buried depth, and the main influence range is within the buried depth of 0-14 m. Numerical simulation results show that: (1)without digged hole, the main influence range of the main soil squeezing displacement is about 8 times of pile diameter; (2)the larger the diameter of the digged hole, the smaller the displacement and the influence range of the affected soil on the surface; (3)The ground squeeze displacement caused by the pile construction attenuates in a power function with the distance from the pile position to the measuring point.