(1 中国铁道科学研究院深圳研究设计院，深圳 518034； 2 深圳市地铁有限公司，深圳 518026)

［摘要］两侧土压力不对称时，对撑式基坑支护结构的受力模式与对称时不同，设计中容易被忽视。针对工程实例，分析了不对称荷载作用下支护结构的受力和变形特点，同时考虑到支护结构与周围土体变形的协调，提出了偏压基坑多点支撑支护结构的设计计算方法。与实际监测结果对比表明，本方法可以定性和定量地反映偏压基坑支护结构的重要特征。

［关键词］偏压深基坑；有限元法；弹性地基梁法

Design and calculation of multipropped retaining structures for asymmetrically loaded deep excavation

Pang Xiaochao¹, Liu Guonan¹, Chen Xiangsheng², Gu Wentian¹(1 Shenzhen Research and Design Institute of China Academy of Railway Sciences，Shenzhen 518034，China;2 Shenzhen Metro Co., Ltd.，Shenzhen 518026，China)

Abstract:The load mode of horizontal braced retaining structure acted by the asymmetric earth pressure is much different from that of symmetric earth pressure, which might be neglected in design practice. By analyzing the load and deformation of an engineering example of the asymmetrically loaded deep pit and considering deformation coordination between the retaining structure and soil, a design method had been presented. Through comparing  calculation rerults with monitored results, it is demonstrated that the proposed method provides satisfied results for the asymmetrically loaded retaining structure.

Keywords:asymmetrically loaded deep pit; finite element method; elastic subgrade method

作者简介：庞小朝，高级工程师，博士生，Email:pangxc81@163.com。