低能量强夯联合真空井点降水在地基处理中的应用

Application of Low Energy Dynamic Compaction Combined with Vacuum Well Point Dewatering in Foundation Treatment

针对沿海地区由吹填而成的软弱地基场地,利用低能量强夯联合真空井点降水是应用较为广泛的地基处理方式。其在地基处理效果、综合造价和施工工期等方面优势明显。上海市老港镇某场地为吹填而成,目前尚未完成固结沉降,根据设计要求,地基处理时需回填土方厚度约3.0 m。分析场地地基处理过程中的监测成果和地基处理后的检测结果,表明:低能量强夯联合真空井点降水地基处理方法对粉性土层的加固效果非常显著,可供类似工程参考。

Aiming at the soft foundation site formed by hydraulic filling in coastal areas,the use of low-energy dynamic compaction combined with vacuum well point dewatering is a more widely used foundation treatment method.It has obvious advantages in terms of foundation treatment effect,comprehensive cost and construction period.Some site in Laogang Town,Shanghai was filled by hydraulicfilling,and the consolidation settlement has not yet been completed.According to the design requirements,the thickness of the backfilled earth is about 3.0 m during the foundation treatment.Analyzing the monitoring results during the site foundation treatment&the testing results after the foundation treatment,it shows that the foundation treatment method of low-energy dynamic compaction combined with vacuum well point dewatering has a very significant effect on the silty soil reinforcement,which can be used as reference for similar projects.