摘要
针对地铁车站超深基坑开挖坑内隆起的预估分析,在静止侧压力系数室内试验仪上对上海的土层土样进行加荷-卸荷试验模拟基坑的开挖。通过对试验数据的进一步分析整理,采用侧向应力松弛法以及卸荷比与回弹模量的关系规律来研究基坑开挖回弹的规律,以便在地铁车站超深基坑开挖中采用合适的工程措施,从而保证工程的安全,并为其他工程应用提供借鉴和参考。
A foundation pit excavation is simulated on K0 tester by loading-unloading test of the soil of Shanghai, to analyze the unloading resilience of deep subway station foundation pit. To ensure proper measure is taken in the excavation project of deep subway station foundation pit, the regularity of unloading resilience is studied by using the method of lateral stress relaxaticn. Through analyzing the relations between unloading ratio and resilience modulus, a proper engineering measure is taken, that will quarantee the project safety and provide reference for other projects.
出处
《城市轨道交通研究》
2008年第3期52-55,共4页
Urban Mass Transit
关键词
深基坑
回弹模量
卸荷比
deep foundation pit
resilience modulus
unloading ratio
