摘要
目前城市空间日益紧缺,在城市内进行基坑开挖面临的狭小空间、复杂环境问题也逐渐成为基坑工程设计的重点难点;同时,在工程设计整体向地下要空间的思路下,基坑大多开挖深度较深。结合北京市昌平区某基坑工程设计案例,介绍了复杂环境下基坑优化设计,该基坑紧邻周边建筑物,周边建筑物基础埋深、基础形式、建筑年代、使用功能各异,根据环境条件,设计采用了"多标高+降台阶+不同参数"的桩锚支护体系,同时在施工过程中实施动态设计管理,支护结构工艺简单、节约造价、动态灵活,同时保证了基坑工程安全,对类似工程具有借鉴作用。
At present,urban space is becoming increasingly scarce,and the narrow space and complex environment problems faced by excavation of foundation pits in cities have gradually become the key and difficult points in the design of foundation pits.At the same time,most of the foundation pits are excavated in deeper depth under the idea that the whole engineering design is to underground space.Based on the design case of a foundation pit project in Changping District of Beijing,this paper introduces the optimal design of foundation pit in complex environment.The foundation pit is adjacent to the surrounding buildings,and the foundation depth,foundation form,construction age and use function of the surrounding buildings are different.According to the environmental conditions,the pile-anchor supporting system of "multi-elevation + step reduction + different parameters" is designed and adopted,and the dynamic implementation is also carried out in the construction process.Design and management,support structure technology is simple,cost-saving,dynamic and flexible,while ensuring the safety of foundation pit engineering,which can be used for reference for similar projects.
作者
张丹
陈全飞
夏向东
刚玉印
Zhang Dan;Chen Quanfei;Xia Xiangdong;Gang Yuyin(China Ordnance Industry Survey& Geotechnical Institute Co. , Ltd.,Beijing 100053,China)
出处
《岩土工程技术》
2019年第4期208-213,共6页
Geotechnical Engineering Technique
关键词
深基坑
复杂环境
优化设计
狭小空间
桩锚支护
基坑安全
deep foundation pit
complex environment
optimized design
narrow space
pile anchor support system
safty of foundation pit
complex enviornment
