非对称荷载下隧道基坑的明挖法施工监测与优化

Monitor and optimization of open excavation construction foundation pit in the tunnel of asymmetrical load

按对称受荷工况设计的某下沉式隧道基坑支护结构,因场地环境复杂,实际受到非对称荷载作用,致使基坑施工中支护结构的安全问题不易确定。通过适时监测,较好地解决了该基坑施工的安全控制和设计调整问题,为类似基坑的施工提供了借鉴经验。

A shoring structure of the subsidence-style tunnel is designed based on symmetrical load. Owing to the complex surroundings of foundation pit, the structure in fact influenced by asymmetrical load, which makes the security of shore structure uncertain in the construction process of the deep pit. By means of real time construction monitoring, we have good control of security and the adjusting of design under construction of the deep pit. This sets a good example for similar deep pit construction.