渣土桩复合地基承载特性数值模拟分析  

Numerical Analysis of Composite Ground Formed by DDC Method

作　　者：孙青娟[1] 刘增荣[1] 李小龙[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《土工基础》2014年第1期68-71,103,共5页Soil Engineering and Foundation

摘　　要：渣土桩复合地基属于半刚性半柔性桩复合地基,加固地基效果明显,利用ANSYS有限元软件对渣土桩单桩复合地基承载力进行了数值计算分析,结果表明,桩体、桩间土协调工作性较好;桩与桩间土的压缩模量对复合地基的承载特性影响较大;桩长对提高渣土桩复合地基的承载力效果不明显,应以实际工程地基处理目的为首要考虑因素。The composite ground of large diameter columns formed by Deep Dynamic Compaction （DDC） method is numerical analyzed by using commercial software ANSYS. The analytical results indicate that a good compatibility between the DDC formed columns and surrounding soils is demonstrated. The DDC formed composite ground belongs to a composite soil of semi- rigid and semi flexible subgrades. The compression modulus of surrounding soils has a significant impact on the bearing capaci- ty of the composite foundations. The length of the column has less influence on the bearing capacity of the treated foundations.

关 键 词：渣土桩 复合地基 承载特性 ANSYS有限元分析 

分 类 号：TU472[建筑科学—结构工程]