摘要
某电厂基坑开挖深度9.5m,采用土钉墙作为支护结构,施工中曾出现水平和斜裂缝。分析裂缝原因后对基坑进行加固,采取加长土钉长度并加大角度以提高摩阻力、设置超前桩以保证支护体系安全稳定、降低地下水位以减轻坑壁侧压力等措施,使基坑位移增量明显减小,累计位移增量小于10mm,保证了施工安全。
Soil nailed retaining wall was adopted as shoring struc-ture for9.5m depth excavation works of a power plant construction.Horizontal and inclined cracks once appeared in the wall.After analy-sis on the cause thereof,variety of technical measures was adopted to strengthen the wall.Super-long soil nails with greater slope were used to increase friction;Advanced piling was adopted to secure safety and stability of the shoring system;Dewatering was made to reduce lateral thrust by underwater.Monitoring indicated the lateral displacement of the retain ing wall was reduced and the cumulative displacement was less than10mm and thus safety secured.
出处
《建筑技术》
北大核心
2003年第2期115-117,共3页
Architecture Technology
关键词
土钉墙
支护
深基坑
原因
加固
施工
deep foundation pit
soil nailing retaining
strengthen-ing
stability
