Analysis of excess pore water of grouted mciro-piles with PVDs ground treatment method

作者：Wang Zhaoyu; Mei Guoxiong

来源：Electronic Journal of Geotechnical Engineering, 2015, 20(13): 5877-5882.

• Consolidation process
• Dissipation of excess pore water pressure
• Excess pore water pressure
• Ground improvement
• Micro piles
• Pore waters
• Pre-fabricated vertical drains
• Pressure grouting

Micro-piles pressure grouting for the treatment of soft soils often induces high excess pore water pressure and limits the efficiency of the improvement. To take advantage of the higher excess pore water pressure, a ground improvement method was proposed for treatment of soft soils. Prefabricated vertical drains (PVDs) were installed between adjacent micro-piles. The method of micro-piles combined with PVDs changes the grouting into a radial accelerated consolidation process that increases improvement efficiency significantly. This paper describes a numerical study using finite element analysis to examine the performance of the method. It has demonstrated that the installation of PVDs significantly improves the dissipation of excess pore water pressure of soft soils. Based on the research results, the treatment appears to be practical for soft soils improvement and has many advantages over conventional micro-piles grouting.

• 出版日期2015
• 单位南京大学