关键词: 管桩, 挤土效应, 数值模拟, 力学性能

Abstract: The case history of the1600mm acid pickling (HAPL) project of a stainless-steel company is presented in this paper. The ABAQUS software is used to simulate the soil squeezing effect of PHC pipe piles. The influence of PHC pipe pile diameter and the friction coefficient of the pile soil interface on the soil squeezing effect are discussed, and suggestions that controlling the soil squeezing effect of PHC pipe piles are proposed. The results show that, with the development of the PHC pipe pile installation process, the radial displacement of the soil increases gradually and decays rapidly after reaching the peak value in the pile tip area; The radial displacement of the soil decreases logarithmically with the increase of the distance from the pile center, and the influence range of the soil squeezing effect is about 9 times of the pile diameter. The diameter of the PHC pipe pile and the friction coefficient of the pile-soil interface have a great influence on the soil squeezing effect. With the increase of the friction coefficient, the radial displacement of the soil increases, while the surface uplift gradually decreases. The radial displacement of the soil and the surface uplift increase with the increase of the pile diameter.

Key words: Pipe Piles, Soil Squeezing Effect, Numerical Simulation, Mechanical Property