强夯加固饱和土地基产生的超静孔隙水压力测试分析  

Analyses of excessive pore water pressure in reinforcing saturated soil foundation by dynamic compaction

作　　者：雷发洪 Lei Fahong(Sichuan Institute of Building Research,Chengdu 610081,China)

机构地区：[1]四川省建筑科学研究院有限公司,成都610081

出　　处：《工程勘察》2021年第10期40-43,共4页Geotechnical Investigation & Surveying

摘　　要：以四川省西昌市某饱和土场地地基处理为例,采用碎石桩+强夯的处理方式。在试夯区中心位置不同深度的土层中埋设孔压传感器,通过观测不同点位夯击施工过程中,试夯区中心位置不同深度土层中孔隙水压力的变化规律,得出该场地强夯施工的有效影响深度约为9m,在一遍夯击过程中夯点间距不宜小于8m,可为类似场地强夯处理方案设计中合理确定加固深度及夯点间距提供借鉴。Taking the saturation soil ground treatment in Xichang of Sichuan Province as an example,the gravel piles and dynamic compaction combined method are used for the foundation treatment.The pore water pressure gauges were embedded at different depths in the centre of the test zone,and the variation of excessive pore water pressure during the dynamic compaction construction process of different points are analyzed.The results show that the influence depth of the dynamic compaction is about 9 meters on this ground,and the distance of neighbouring tamping points should not be less than 8 meters,which could provide the reference for similar dynamic compaction scheme.

关 键 词：强夯 超孔隙水压力 加固深度 夯点间距 

分 类 号：TU472.1[建筑科学—结构工程]