强夯+CFG桩复合地基在较厚回填土中的应用  

Application of dynamic compaction and CFG pile composite foundation in the treatment of thick backfill

作　　者：郑宇[1] 王天勇 杨铮[1] 金灿国[1] 王建华[1] 张相勇[1] 董素芹[3] 

机构地区：[1]北京市建筑设计研究院有限公司,北京100045 [2]鄂尔多斯市城投房地产开发有限公司,鄂尔多斯017100 [3]内蒙古农业大学职业技术学院建筑工程技术系,包头014000

出　　处：《建筑结构》2013年第2期79-82,27,共5页Building Structure

摘　　要：通过工程实例,介绍了在较厚回填土中采用强夯+CFG桩复合地基进行地基处理以提高地基承载力及控制沉降的设计及施工方法。强夯后对表层土进行标准贯入试验及静力载荷试验,打入CFG桩后对复合地基承载力进行单桩复合地基静载荷试验与单桩竖向抗压静载荷试验检测,结果表明地基承载力与变形均满足规范要求。工程实例表明采用此方法可节约造价、缩短工期且安全可靠。The design and construction method of dynamic compaction plus cement fly-ash grave（CFG） pile were introduced to enhance the bearing capacity of foundation and control foundation settlement in thick backfill by an engineering example.The standard penetration test and static loading test were carried out to topsoil compacted by dynamic compaction,and the bearing capacity of the composite foundation processed by dynamic compaction and CFG was detected by static loading test of single pile composite foundation and vertical compression static loading test of single pile.The results show that the bearing capacity and deformation of composite foundation are acceptable and can meet the requirement of related codes.Moreover,the engineering example shows this method can shorten the construction period and is economic,convenient and safe.

关 键 词：强夯 CFG桩 回填土 地基处理 

分 类 号：TU472.99[建筑科学—结构工程]