(湖南大学建筑安全与节能教育部重点实验室， 长沙410082)

［摘要］以长沙五一广场地铁车站基坑为例，采用均匀设计法与有限元模拟相结合，以不同施工阶段的坑外实测沉降值为检验指标，在经验范围内反演分析土体的弹性模量，并根据反演结果预测基坑外的最终沉降值。结果表明，采用均匀设计法可以减少试验次数，反演分析得到的土体弹性模量值明显优于按经验区间的取值，由此可见,将均匀设计理论、有限元模拟试验、实测数据相结合应用于基坑土体弹性模量的反演和基坑周边的沉降预测是简单、易行的。

［关键词］均匀设计; 反演分析; 土体弹性模量; 基坑; 沉降预测; 有限元

中图分类号：TU473，TV551.4+2文献标识码：A文章编号：1002-848X(2014)03-0084-06

Back analysis on soil parameters and forecast on settlement of foundation pit based on uniform design method

Wu Zhaoyang, Li Zhengnong, Zhong Min

(Key Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China)

Abstract: Based on the foundation pit design of Wuyi Square subway station in Changsha, the elasticity modulus of soil was back analyzed in empirical range by combining uniform design method with finite element analysis method, in which the monitoring settlement outside the foundation pit in different construction stages were used as inspection indexes and the final settlements outside the foundation pit were forecasted according to back analysis results. Results show that by using uniform design method, the number of tests can be reduced and the elasticity modulus of soil is much more rational than those from empirical range. The combination application of uniform design method, finite element analysis test and monitoring data is easy to operate in back analysis of the elasticity modulus of foundation pit soil and settlement forecast of soil near the foundation pit.

Keywords: uniform design; back analysis; elasticity modulus of soil; foundation pit; settlement forecast; finite element

作者简介：吴朝阳，博士研究生，工程师，Email: sun4652@sina.com。

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