工程地质学报2012，Vol.20Issue(1)：116-122,7.
真空联合堆载预压下软土路基的位移和孔压监测分析
ANALYSIS ON DISPLACEMENT AND POREWATER PRESSURE OF SOFT SOIL FOUNDATION UNDERVACUUM-SURCHARGE PRELOADING
摘要
Abstract
This paper is based all kinds of soft soil foundation monitoring results of a first-class highway. The monitoring data of the foundation surface settlement, porewater pressure, soil horizontal displacement variation rules of time and space are analyzed in detail. The results show that about 65 percents of the total settlement of foundation is due to the silt layer. The horizontal displacement of low liquid limit clay layer (under 15m) is smaller. It is related to its bigger soil intensity. Excessive fast filling velocity can make the general excessive porewater pressure above zero. Therefore close observation of the data of pore pressure is needed in surcharge preloading process in order to prevent the foundation instability. There is nearly no surface horizontal displacement at more than. 30m outside the reinforced area,which has no effect on river embankment security. Combined with the monitoring data of porepressure and layered settlement, the effective influence depth of the foundation by vacuum combined surcharge preloading can reach to about 2m.关键词
真空联合堆载/监测/土体水平位移/孔隙水压力/沉降Key words
Vacuum-surcharge preloading/Monitoring/Soil horizontal displacement/the porewater pressure/Settle-ment分类
交通工程引用本文复制引用
魏家鸣,王清,王剑平,杨杰,单博..真空联合堆载预压下软土路基的位移和孔压监测分析[J].工程地质学报,2012,20(1):116-122,7.基金项目
国家自然科学基金项目(49972089 40372122,40911120044,40902077,40372122,2011J014)资助. （49972089 40372122,40911120044,40902077,40372122,2011J014）
