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| Simulation study on the forward problem of jet grouting pipe 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*
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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 |
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Abstract The feasibility of resistivity tomography for monitoring jet grouting pipe 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.
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Published: 18 June 2025
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