参数选取在基坑计算中的影响分析

对某一基坑开挖工程进行数值计算分析,考虑参数对计算结果的影响,着重分析不同参数下基坑开挖过程中周围土体的应力状态以及位移情况。结果表明:采用由模拟基坑开挖侧壁土体卸荷路径下三轴试验确定的模型参数计算出的土体卸荷情况较由常规三轴试验确定的参数计算结果严重,且卸荷路径下三轴试验确定的参数计算出的土体水平位移较大,对于实际工程而言是偏安全的。

Analysis on the Influence of Parameter Selection in Foundation Pit Calculation

In this article, the numerical analysis of a foundation pit excavation project is done. Considering the influence of the parameters on the calculation results, this article emphatically analyzes the stress state of surrounding soils during the process of excavation under different parameters and displacement. Results show that the soil unloading conditions calculated by model parameters determined by triaxial test under simulation excavation wall soil unloading paths is serious than that determined by conventional triaxial test the parameters, and unloading path under triaxial test to determine the parameters to calculate the soil horizontal displacement is larger, so it is relatively safe for practical engineering.