Analytical models of the coupling of vacuum preloading and electro-osmosis consolidation for ground stabilization

作者：Wu Hui; Hu Liming^*

来源：Journal of Tsinghua University(Science and Technology), 2012, 52(2): 182-185.

• Axisymmetric models
• Differential settlements
• Excess pore pressure
• Soft ground improvement
• Vacuum preloading

Vacuum preloading and electro-osmosis consolidation are two effective methods for soft ground stabilization. Those two techniques have been coupled in engineering practice, with analyses based on an axisymmetric model. This paper presents an analytical model in axisymmetric coordinate to predict the excess pore pressure and the ground settlement. An analytical solution is obtained based on an assumed equal strain condition for the 1-D axisymmetric model. A finite element model was developed to further investigate the development of the excess pore water pressure and the ground settlement during ground treatment. Numerical results show that vacuum preloading with electro-osmosis gives a larger negative excess pore water pressure to consolidate the ground and the differential settlement can be decreased to 0.01 cm.

• 出版日期2012
• 单位清华大学