摘要
中心岛法应用在大型基坑支护工程中具有突出的优越性,但目前其设计方法尚不完善。介绍中心岛法加地下连续墙方案在广州某高层办公楼地下室基坑设计中的应用情况,该方案具有隔水围闭性强、支护刚度大、节省工期等优点。着重介绍方案的设计思路、成立条件,并对作用在平衡土体上的土压力大小进行讨论,并提出了按折减m值进行支护结构计算、按朗肯被动土压力进行平衡土体验算的实用设计方法。工程实践表明,采用中心岛法具有突出的综合效益,所提设计方法安全可行。
The construction method of center island possesses great advantage in the retaining and protecting for largescale building foundation excavation. The application of center island method with diaphragm in the basement of a high-rise building in Guangzhou is presented, which has the advantage of water isolation, great rigidity and shorter construction period, etc. The design concept and feasibility condition of the scheme is introduced, and the pressure on the claybank is discussed, A practical design method using reduced “m” value for structure computation and Rankine passive earth pressure for claybank calculation is developed, which is proved to be feasible and safe by practice.
出处
《建筑结构》
CSCD
北大核心
2005年第7期17-19,31,共4页
Building Structure
关键词
中心岛法
支护工程
大型基坑设计
支护刚度
隔水围闭性
supporting
foundation excavation
center island
diaphragm
reverse construction
balance claybank
