某紧邻既有地铁设施的深基坑支护设计变形分析

Deformation Analysis of a Deep Foundation Pit Supportting Design Next to Existing Metro Facilities

该文以西安地铁2号线沿线某深基坑支护设计为例,通过基坑支护结构选型的优化来控制基坑的水平变形,既确保地铁设施的安全运营,又达到安全可靠、经济合理、施工周期短的效果。经规范法计算、有限元(数值)分析及现场监测对比分析,验证了支护设计选型与提出的变形控制原则均满足规范及施工要求。

This paper takes a design of deep foundation pit support next to the No. 2 metro of Xi＇an as an example. Through optimzing the selection of supporting structure of foundation pit,the horizontal deformation of foundation pit is controlled. It not only ensures the safe operation of subway facilities,but also achieves the effect of safe and reliable,economic and reasonable,short construction period. Through the comparative analysis of the normal method calculation,finite element（ numerical value） analysis and the field monitoring,it verities that the selection type of supportting design and the proposed deformation control principle all meet the requirements of the specification and construction.