摘要
结合山西典型液化场地,为提高场地的抗液化性能,选用双元复合地基和预应力管桩加固两种地基处理方式,通过测定地基处理前后同一孔的标准贯入锤击数,与计算出的标准贯入锤击数临界值进行比较,分析处理前后场地的可液化性能。结果表明,采用双元复合地基和预应力管桩加固地基都可以提高地基土的抗液化性能,双元复合地基比预应力管桩加固效果更佳。同时,结合相关室内试验,基于本工程指出:当桩间距采用3D(D为桩直径)时,能比较有效地提高液化土的抗液化强度。为液化土地基处理方案的选择提供参考与指导。
Combining typical liquefaction ground in Shanxi , the dual composite foundation and prestressed pipe pile reinforced foundation are applied in order to improve anti-liquefaction characteristics. By measuring standard penetration blow count of the same hole before and after ground treatment, the results are compared with critical value of computed blow count , thus anti-liquefaction characteristics of the ground before and after treatment are analyzed. The research results show that the dual composite foundation reinforced and prestressed pipe pile foundation can improve anti-liquefaction performance of soil , dual compound is better than the prestressed pipe pile reinforcement. Also it points out that when pile spacing is 3D （D is the pile diameter）, liquefaction resistance of the soil will be effectively improved based on this project. It could provide reference for the selection of foundation treatment scheme in the liquefaction site.
出处
《建筑科学》
CSCD
北大核心
2015年第11期126-130,共5页
Building Science
基金
山西省科技攻关项目:地震地区复合桩基体系的应用研究(20100321070)
关键词
液化场地
地基处理
双元复合地基
预应力管桩
抗液化性能
liquefaction ground
foundation treatment
dual composite foundation
prestressed pipe pile
antiliquefaction characteristic
