摘要
随着地下空间的不断开发,单一支护方法已难以满足复杂的基坑设计,而多种支护方式的综合应用已经变得越来越普遍。以北京某深基坑工程为例,分析了深基坑支护结构发生较大位移、桩体开裂的原因,介绍了该深基坑的原支护设计和加固所采用的支护方案。对加固处理后的监测数据进行分析,结果表明该深基坑支护设计方案合理,满足要求。
With the continuous development of underground space excavation,the single and simple support form is difficult to satisfy the design of complex foundation excavation nowadays,while the application of multiple support forms become more and more popular in foundation excavation engineering.Based on a super-large deep foundation excavation in Beijing,this paper analyzes the reasons of large displacement and pile cracks in super-large deep foundation excavation,original support forms and reinforce support forms of deep foundation excavation including pile pre-anchor,double-row piles,long-span brace,pre-lattice-anchor,over-long chemical churning pile are introduced.Monitoring data analysis after reinforcement shows that the support forms are reasonable and meet the requirements.
出处
《施工技术》
CAS
北大核心
2017年第12期57-60,101,共5页
Construction Technology
关键词
深基坑
支护
加固
预应力锚索
旋喷桩
施工技术
deep foundation excavation
supports
reinforcement
prestressed anchor
jet grouting pile
construction
