An FEM/VOF hybrid formulation for fracture grouting modelling |
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| Institution: | 1. Nanyang Centre for Underground Space, School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore;2. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;3. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China;4. Department of Civil Engineering, Monash University, Clayton, 3800, VIC, Australia |
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| Abstract: | A numerical model using a hybrid formulation of a finite element method (FEM) coupled with the volume of fluid (VOF) technique to simulate the fracture grouting processes in soils is described. The numerical model considered the couplings of the stress distribution, with two-phase fluid flows, and the mesh element damage. The hardening of grout in soil is described by a time-dependent Young’s modulus and viscosity. Crack initiation, branching, propagation, and grout vein growth in homogeneous and heterogeneous soils can be numerically reproduced. Although the method is developed particularly for simulating fracture grouting, the processes of compaction grouting and permeation grouting can also be numerically simulated. Some grouting cases have been simulated with results similar to the experimental results. This further confirms the adequacy and the power of the numerical approach. |
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| Keywords: | Finite element method Volume-of-fluid Fracture grouting |
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