卵型消化灌深基坑开挖防止管涌的施工方法

Construction Scheme for Prevention of piping in Excavation of Foundation Pit of Egg-shaped Digester

某工程在黄海高程-10.2^-10.8处有承压水存在,由于挖土卸荷作用,使基底覆土重力小于承压水浮力,为防止基坑因突涌而失稳,对基底采用固结灌浆施工措施,保证了基坑的稳定。

In construction of a project,there exists the confined water at （ - 10.2） - （ - 10.8） m of yellow sea Datum . Due to the unloa- ding incurred by excavation, the weight of coverage soil on foundation base is less than the buoyancy of confined water. In order to prevent instability of foundation pit caused by drainage of confined water, consolidation grouting measure is adopted for the foundation base, so that the foundation pit is stabilized.