复杂环境基坑半逆作法支护结构的探讨

Application of the Semi Reverse Construction Method in Complex Supporting Structures

介绍了昆明某基坑在已经施工完大部分支护结构的情况下,采用原桩锚设计方案无法继续实施,经分析采用"半逆作法"设计方案。对该方案采用有限元法进行了变形及内力分析,结合现场施工情况及监测结果,表明在确保周边环境安全前提下,采用局部半逆作法可有效地缩短施工总工期,为今后类似工程提供了一定的借鉴作用。

The existing supporting structures in Kunming are almost completed,but the planned ground anchors could not be installed.The semi-inverse construction was applied to remediate this deep excavation project.Finite element analysis was performed to obtain the stress and strain in the supporting structures.Construction monitoring system was also installed.Based on the observed monitoring data,it is concluded that the semi-inverse construction technique can effective reduce the construction duration.