摘要
为研究重力式水泥土墙在连云港地区海相沉积土基坑支护中的应用可行性,结合连云港市中华西路西延新建工程基坑支护设计案例,分析重力式水泥土墙在连云港地区海相沉积土基坑支护中的应用。在此基础上重点研究坑内地基处理和不同土层力学指标选取对基坑稳定性的影响。研究结果表明:重力式水泥土墙应用在连云港地区海相软土基坑支护中是可行的,同时基坑稳定性分析计算时可考虑坑内地基处理对基坑稳定性的有利影响,基坑工程设计中淤泥、淤泥质黏土应采用三轴不固结不排水抗剪强度指标,若采用直接剪切强度指标,需对基坑抗滑移系数、整体稳定安全系数容许值放大1.50倍。
In order to study the feasibility of the gravity cement-soil wall used in the foundation pit support in marine sedimentary soil in Lianyungang area, the paper analyzes the application of gravity cement-soil wall used in the foundation pit support in marine sedimentary soil in Lianyungang area with reference to the design of foundation pit support for the new west extension project of Zhonghua West Road in Lianyungang City. Based on that, the research on the influence of foundation treatment and the selection of different soil mechanics indexes on the stability of foundation pit is conducted. The research results show that the gravity cement wall used in the foundation pit support in marine sedimentary soil in Lianyungang area is feasible, and the stability analysis of foundation pit takes into consideration of the favorable influence of the foundation treatment in the pit on the stability of foundation pit. Then, the triaxial unconsolidated and undrained shear strength index should be adopted in the design of silt and silty clay in foundation pit engineering. If direct shear strength index is adopted, the allowable value of anti-slip coefficient and overall stability safety factor of foundation pit should be enlarged by 1.50 times.
作者
潘必胜
PAN Bisheng(China Railway Shanghai Design Institute Group Co.,Ltd.,Shanghai 200070,China)
出处
《铁道标准设计》
北大核心
2020年第6期57-60,共4页
Railway Standard Design
关键词
水泥土搅拌桩
海相沉积土
重力式水泥土墙
基坑稳定
力学指标
安全系数
cement-soil mixing pile
marine sedimentary soil
gravity cement-soil wall
stability of foundation pit
mechanical index
safety factor
