摘要
以平面应变比对固结理论为基础,通过比较前人研究成果,选择考虑竖向排水体涂抹效应的砂井地基等效计算方法,根据真空预压加固软土地基的机理,运用有限元分析,提出一种真空预压计算方法。由于真空预压过程中地下水头将降低,因此在计算中采取降低地下水头的方式等效模拟地基表面施加的的真空度。结合工程实例给出算例,对该方法的可靠性进行研究。通过将计算结果同实测资料进行对比,验证了该方法的准确性。
Based on Biot consolidation theory in plane strain conditions, with the equivalent analyzing method of plane strain of prefabricated vertical drain （PVD） ground considering smearing effect and the mechanism of vacuum preloading, a method for simulation of vacuum preloading is proposed. In order to simulate the pumping of water in vacuum preloading with suction, an equivalent drop in groundwater head is defined along the ground surface. This method is applied to a consolidation settlement calculation for a soft ground improved by vacuum preloading. By comparing with the measured data, this method is verified to be effective. Also, it has also been proved that this method is convenient and accurate to be used in engineering design and prediction.
出处
《建筑技术》
北大核心
2010年第3期235-239,共5页
Architecture Technology
基金
中国船舶工业集团公司研究开发项目(船工科[2006]1129号)
上海市重点学科建设项目(B308)
关键词
真空预压
加固机理
砂井地基
地下水头
有限元
vacuum preloading
mechanism of consolidation
sandwell ground
groundwater head
finite element mothed
