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(1 中國(guó)鐵道科學(xué)研究院深圳研究設(shè)計(jì)院，深圳 518034； 2 深圳市地鐵有限公司，深圳 518026)

［摘要］兩側(cè)土壓力不對(duì)稱(chēng)時(shí)，對(duì)撐式基坑支護(hù)結(jié)構(gòu)的受力模式與對(duì)稱(chēng)時(shí)不同，設(shè)計(jì)中容易被忽視。針對(duì)工程實(shí)例，分析了不對(duì)稱(chēng)荷載作用下支護(hù)結(jié)構(gòu)的受力和變形特點(diǎn)，同時(shí)考慮到支護(hù)結(jié)構(gòu)與周?chē)馏w變形的協(xié)調(diào)，提出了偏壓基坑多點(diǎn)支撐支護(hù)結(jié)構(gòu)的設(shè)計(jì)計(jì)算方法。與實(shí)際監(jiān)測(cè)結(jié)果對(duì)比表明，本方法可以定性和定量地反映偏壓基坑支護(hù)結(jié)構(gòu)的重要特征。

［關(guān)鍵詞］偏壓深基坑；有限元法；彈性地基梁法

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

作者簡(jiǎn)介：龐小朝，高級(jí)工程師，博士生，Email:pangxc81@163.com。