摘要
碎石桩主要通过其挤密效果,提高地基承载力、较小沉降,达到加固地基土体的效果;CFG桩作为一种刚性桩体,能承受较大的上部荷载,在提高承载力的同时,能较好地控制地基竖向变形。CFG桩与碎石桩交叉布置,形成多桩型复合地基,CFG桩桩端位于相对硬层,在提高承载力的同时,起到控制变形、协调变形的作用。该项目楼座基底局部为填土,部分为中风化灰岩,碎石桩对填土挤密处理后,再采用CFG桩与碎石桩形成多桩型嵌岩复合地基,满足了加固浅部不良土体及提高承载力的要求,对中风化灰岩设置褥垫层,很好地解决了半挖半填基岩场地变形协调的问题,取得了较好的经济效益和社会效益。
Gravel pile can improve the bearing capacity of the foundation and reduce the settlement mainly through its compaction effect, so as to achieve the effect of strengthening the soil. As a kind of rigid pile, CFG pile can bear large upper load, and at the same time improve the bearing capacity, it can better control the vertical deformation of foundation. CFG pile and gravel pile intersect layout, forming multi-pile composite foundation, the end of CFG pile is located in the relatively hard layer, which can control the deformation and coordinate the deformation while improving the bearing capacity. In this project, part of the foundation base is filled with soil and part of it is moderately weathered limestone. After the filling is compacted by gravel pile, CFG pile and gravel pile are used to form a multi pile rock socketed composite foundation, which meets the requirements of strengthening shallow bad soil and improving bearing capacity, the cushion layer is set up for the medium weathered limestone, which solves the problem of half excavation and half filling bedrock site deformation coordination, and achieves good economic and social benefits.
作者
盛志战
王勇
刘青松
胡高伟
高素芳
Sheng Zhizhan;Wang Yong;Liu Qingsong;Hu Gaowei;Gao Sufang(BGI Enginering Consulants Ltd,Bejing 100038,China)
出处
《建筑科学》
CSCD
北大核心
2022年第7期115-119,共5页
Building Science
关键词
CFG桩
多桩型
复合地基
变形协调
数值分析
CFG pile
multi-pile
composite foundation
deformation coordination
numerical analysis
