山东黄河冲积区杂填土地基处理实例分析  

Case History of Soil Improvements of Miscellaneous Fills in Yellow River Delta Alluvium of Shandong

作　　者：侯芳 

机构地区：[1]山东省淮河流域水利管理局规划设计院,济南250100

出　　处：《土工基础》2017年第6期655-658,673,共5页Soil Engineering and Foundation

摘　　要：杂填土的地基处理是目前城市建设中经常面对的问题。山东黄河冲积区杂填土地基具有"浅埋地下水位"和"杂填土下仍分布软弱土层"两个典型特征,这影响着地基处理方法的选取、处理深度的设计、材料和施工机械的选择。根据本区的两个工程实例的勘察资料和建筑物特征,主要分析评价了CFG复合地基、级配砂石换填垫层法和柱锤冲扩桩复合地基3种地基处理方法处理杂填土的适用性。主要从地基处理方法的选用过程、加固机理和计算等方面总结了相关实践经验。In the urban construction,the improvement of miscellaneous fill soils is frequently encountered.The miscellaneous fill soil in Shandong Yellow River delta alluvium has the characterization of shallow groundwater and soft soil underlying layers.The two typical characterizations strongly affect the selection of soil improvement methods,soil improvement depth,material and construction equipment.Based on the site subsurface conditions as well as building requirements at two sites,three soil improvement methods;Cement-Fly-ash Gravel（CFG）columns;soil replacement with compacted graded sand and gravel and composite ground with columns of expanded base formed by founding;are compared and discussed.This design and construction aspects of these soil improvement methods are also introduced.

关 键 词：杂填土 地基处理 换填垫层法 CFG复合地基 柱锤冲扩桩复合地基 

分 类 号：TU472[建筑科学—结构工程]