考虑抗剪强度、渗流作用的基坑抗突涌公式分析

Consider Soil Shear Strength,Seepage Pit Formulas Check Bursting Analysis

传统的基坑抗突涌验算有一定的局限性,验算的偏保守带来了设计的不合理。从基坑坑底土体自身的抗剪力、基坑坑底土体渗流特征出发,推导出了新的基坑抗突涌验算公式。并考虑了基坑坑底土体自身的特征,从基坑坑底土体有无吸附能力方面,深入讨论了吸附作用对基坑坑底土体有效浮重度、有效渗透力的影响。考虑到基坑坑底土体应视作弱透水层,为了工程的安全,取用了k=k2=1。最后通过实例证明,新的抗突涌验算公式比传统的土压力平衡法符合实际情况。

The traditional check bursting pit has some limitations, checking the conservative design brings unreasonable. From the excavation pit bottom soil itself shear force, foundation pit bottom soil percolation characteristics a new foundation formula check bursting is deduced. Taking into account its own foundation pit bottom soil characteristics, soil from the excavation pit bottom without adsorption capacity, the adsorption on soil excavation pit bottom float severe effective, efficient penetration effect are discussed in depth. Taking into account soil excavation pit bottom shall be deemed aquitard, in order to secure the project, access to the k = k2 = 1. Finally, examples prove that the new formula check bursting earth pressure balance than traditional method with the actual situation.