Simulation study on the forward problem of jet-grouted pile foundation reinforcement based on DC resistivity method
DENG Xifei1,2,3,SHEN Zhijun1,2,3,WANG Tao1,2,3,JIANG Shenghua1,2,3,YANG Jie1,2,3,LI Hongbo1,2,3*
(1. China Railway No.4 Engineering Group Co., Ltd., Hefei 230026, Anhui，China; 2. China Railway No.4 Engineering Group Engineering Technology Research Institute, Hefei 230026, Anhui，China; 3. China Railway Urban Rail Transit Professional Research and Development Center, Hefei, 230026, Anhui，China)
Abstract: The feasibility of resistivity tomography for monitoring jet-grouted pile reinforcement was investigated through forward simulation of the DC resistivity method. A three-dimensional solid model of jet-grouted pile reinforcement was established by using COMSOL Multiphysics software, and forward simulation analyses were carried out on different excitation modes, electrode parameters, aquifer parameters, and construction processes. It was demonstrated that the opposite-side excitation mode exhibited a stronger forward response peak. The electrode-to-pile distance and aquifer depth significantly affected electrical signals. During the construction process, the changes in the voltage signal were very pronounced in both the drilling and grouting stages, the grouting process had a more pronounced effect. These conclusions verified the feasibility of DC resistivity for real-time jet-grouting monitoring, systematically analyzed influencing factors, provided a theoretical basis for construction monitoring, and promoted the application of this technology in engineering practice.
邓稀肥, 申志军, 汪涛, 江胜华, 杨杰, 李宏波. 基于直流电阻率法的旋喷灌注桩加固正问题模拟研究[J]. 隧道与地下工程灾害防治, .
DENG Xifei, SHEN Zhijun, WANG Tao, JIANG Shenghua, YANG Jie, LI Hongbo. Simulation study on the forward problem of jet-grouted pile foundation reinforcement based on DC resistivity method. Hazard Control in Tunnelling and Underground Engineering, 0, (): 1-.
