Prediction of Limited Compaction Grouting Pressure in the Stress-strain Softening Soil
The Most conventional calculation of limited compaction grouting pressure is based on perfect elastic-plastic constitutive models which is used to describe the stress-strain behavior of soils. However, experimental evidence shows that strain softening elastic-plastic constitutive models are able to represent fairly satisfactorily the behavior of almost all types of soft soils. The present study proposes a new method that predicts the limited compaction grouting pressure for the soft soils. The theoretical basis of the method draws from the investigation of the conical shear failure above the grout bulb. By using the Mohr-Coulomb yield criterion as the initial yield function and the softening elastic-plastic model based on the conventional triaxial compression tests to simulate the strain softening soils, the limited compaction grouting pressure is determined. The small strain in the elastic zone and large stain in the plastic zone and the rational yield function for the strain softening phase stage, the analytical solutions to the compaction grouting pressure are presented. The results indicate reasonable agreement and show a good potential of the proposed method for rationally optimizing the design of compaction grouting operations.
compaction grouting strain softening spherical cavity expansion ultimately pressure
Zou Jin-Feng Yang Xiao-Li Li Liang
School of Civil Engineering & Architecture, Central South University, Changsha 410075, China
国际会议
徐州
英文
29-33
2007-10-22（万方平台首次上网日期，不代表论文的发表时间）