Mechanism Analysis of Soil Compaction Grouting Based on Modified Cam-clay Model
[1]XING Haipeng,WU Guanghua,WANG Ge,et al.Mechanism Analysis of Soil Compaction Grouting Based on Modified Cam-clay Model[J].Journal of Zhengzhou University (Engineering Science),2024,45(pre):2-.[doi:10.13705/j.issn.1671-6833.2025.01.004]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
45
Number of periods:
2024 pre
Page number:
2-
Column:
Public date:
2024-11-30
- Title:
- Mechanism Analysis of Soil Compaction Grouting Based on Modified Cam-clay Model
- Keywords:
- compaction grouting; modified Cam-clay model ; numerical simulation; finite element; compaction mechanism
- CLC:
- TV543+.7
- DOI:
- 10.13705/j.issn.1671-6833.2025.01.004
- Abstract:
- The existing compaction grouting simulation method can only analyze the stress distribution after grouting, and cannot obtain the parameter information reflecting the compaction effect of grouting, such as the void ratio and density of soil after compaction. Therefore, the MCC is introduced to describe the mechanical property of soil, and based on the elastic-plastic finite element theory, a simulation method is established to simulate the compaction grouting process of constant density slurry in soil. A more comprehensive and intuitive description of the formation compaction effect is achieved. The compaction grouting simulation analysis was carried out on clay, silty clay and other low permeability soil. Compared with the analytical and experimental results, t he overall average relative errors of the simulated values and analytical solutions of radial stress and void ratio under different grouting pressures are 4.04% and 0.29% respectively , and the average relative errors between the calculated elastic modulus and void ratio and the field test results are 2.85% and 5.69% respectively, which proves the applicability of this method. On this basis, the distribution characteristics of soil density, void ratio and elastic modulus around the grouting column after grouting reinforcement are analyzed. The results show that when the grouting pressure increases from 0.4 MPa to 1.0 MPa at the grouting depth of 1.5 m, the soil density, elastic modulus and void ratio at the grouting hole center of 0.05 m approximate linear changes, and the average change rates are 0.148 g/cm3/MPa, 0.808 and -0.126 MPa-1, respectively. When the grouting pressure is 0.4 MPa, the increase rates of soil density and elastic modulus and the decrease rate of void ratio at 0.05 m from the center of the grouting hole gradually decrease with the increase of grouting depth. Overall, the density and elastic modulus of the soil around the grouting column are greatly increased after grouting reinforcement, and the void ratio is significantly reduced. The soil parameters change less with the distance from the grouting hole, and gradually return to the initial state. Under the same grouting pressure condition, with the increase of grouting depth, the compaction effect gradually weakens
- References:
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Last Update:
2024-10-10