基于试验研究的基坑支护安全性分析

Safety Analysis of Foundation Pit Support Based on Experimental Study

为了保证基坑支护项目的安全性与可靠性,确保工程整体建设的可行性。基于黏性土壤特性进行相关研究,主要利用倾斜仪测量桩和支护结构的位移并对其进行数值模拟。研究结果表明,试验期间开挖支护位移仅在前2个月呈稳定增长模式,随后逐渐平缓至最终稳定状态。通过数值模拟计算安全系数M sf,得到岩土相关参数的减少使桩安全系数M sf值比支护结构安全系数M sf值高;且随时间的增长,桩位移增量低于支护位移增量。

In order to ensure the safety and reliability of the foundation pit support project and the feasibility of the overall construction of the project.Based on the cohesive soil characteristics,this paper mainly uses the inclinometer to measure the displacement of piles and retaining structures and conduct numerical simulation.The results show that during the test period,the excavation support displacement only shows a stable growth mode in the first two months,and then gradually flattens to the final stable state.The safety factor Msf is calculated through numerical simulation,and it is obtained that the reduction of relevant geotechnical parameters makes the safety factor Msf of pile higher than that of retaining structure;And with the increase of time,the pile displacement increment is lower than the support displacement increment.