深厚软土地区基坑稳定计算的探讨

Discussion on Stability Calculation of Foundation Pit in Deep-Soft Soil Areas

在深厚软土地区用直剪固结不排水强度指标进行基坑抗隆起稳定验算时,应取土体充分固结后所取得的强度指标。对深厚软土层合理分层,提出随深度变化的分层强度指标,为后期基坑支护设计提供更为合理的参数,以保证其设计更为经济合理。当地方经验较丰富时,可适当考虑对稳定计算有利因素,从而更合理地进行围护结构设计。

In deep-soft soil areas, when the consolidated-undrained strength index is used for the calculation of the basal stability of excavation, the soil should be fully consolidated in direct shear test. The deep-soft soil should be layered to obtain reasonable parameters changing with depth, thereby providing more reasonable parameters. The positive factors can properly be considered for stability calculation with rich local experience, which can be more reasonable to refine the design of the retaining structure.