广州市高技能人才实训鉴定基地基坑大变形分析及应急处理

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

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。

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.