东南大学学报（英文版）2004，Vol.20Issue(1)：96-101,6.
真空预压技术加固海堤深厚软基原型试验研究
Ground treatment of sea embankment by vacuum preloading with PVDs
摘要
Abstract
Vacuum provides an alternative in reducing the length of preloading period for soft soil consolidation. In this method, soft clay foundation is preloaded by reducing the pore-water pressures through the application of vacuum pressure in combination with surcharge preloading. A full scale and fully instrumented test embankment was constructed. A drainage pattern system combined with 22 m prefabricated vertical drains (PVDs) length was used with triangular pattern of 1. 2 m spacing. Among the foundation instrumentation, piezometers were installed in the foundation subsoil at varying depth to measure the pore-water pressures. After 6 months of vacuum pressure application at 80 kPa, the test embankments were raised to a maximum height of 5. 5 m. The effect of vacuum preloading was investigated by the field conditions, maintaining higher vacuum pressures, and unloading vacuum. The results are demonstrated the efficiency of combined vacuum and surcharge preloading.关键词
软土/垂直排水井/真空荷载/海堤/地基处理Key words
soft soils/vertical drains/vacuum preloading/embankment/ground improvement分类
建筑与水利引用本文复制引用
刘汉龙,Aly H. Mahfouz,陈永辉..真空预压技术加固海堤深厚软基原型试验研究[J].东南大学学报（英文版）,2004,20(1):96-101,6.基金项目
The National Natural Science Foundation of China (No. 50379010). （No. 50379010）
