(1 华南理工大学建筑设计研究院有限公司， 广州 510641；2 华南理工大学土木与交通学院，广州 510640)

［摘要］在广州市高技能人才实训鉴定基地施工中，西侧基坑支护结构出现了较大变形，曾一度出现了险情。采用对比分析法，对东西两侧基坑的受力及变形进行对比分析，找出西侧基坑支护出现大变形的原因，即没有对地面裂缝及时做灌浆填缝处理，雨水从地面缝隙和大树根下逐渐长期渗入基坑西侧土中所导致的；最后，介绍了应急抢险所采取的措施及抢险后笔者所得的启示。

［关键词］基坑支护； 大变形分析； 应急处理

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2019)20-0116-05

Emergency treatment and large deformation analysis of  foundation pit of Guangzhou High Skilled Personnel Training Appraisal Base

Gong Mosong1, Liu Shuzhuo2, Luo Jiajun1, Liu Yixin1， Mo Huishan1

(1 Architectural Design & Research Institute of SCUT Co., Ltd., Guangzhou 510641, China； 2 School of Civil Engineering & Transportation, South China University of Technology, Guangzhou 510640, China)

Abstract:In the construction of Guangzhou High Skilled Personnel Training Appraisal Base, there was a large deformation in the retaining and protection on the west side of foundation pit and once created a dangerous situation. Using contrast analysis method, the force and deformation of the foundation pit unit on east and west sides of the object were compared and analyzed to find out the reasons for the large deformation of retaining and protection for the foundation pit on the west side. The cracks in the ground were not treated by grouting in time, so rain water gradually infiltrated into the soil on the west side of the foundation pit for a long time from the cracks in the ground and under the roots of the big trees. The emergency treatment measures of the retaining and protection structure, as well as the enlightenment after the emergency were also introduced.

Keywords:retaining and protection for foundation pit; large deformation analysis; emergency treatment

作者简介：龚模松，硕士，高级工程师，一级注册结构工程师，英国皇家结构工程师协会会员，Email:msgong@scut.edu.cn。