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为了分析隧道工程中存在的不确定性,提出采用随机有限元法研究隧道开挖后的应力位移特征。以某深埋隧道为对象,分别采用确定性有限元和随机有限元法,对隧道开挖后的应力和位移特征进行了对比分析,结果表明,采用随机有限元法后,隧道周边第一主应力和隧道周边围岩位移不再是确定值,而是随机变量,具有统计特性。由于工程中荷载及参数的不确定性,随机有限元相比确定性有限元,更加符合实际,为类似工程研究提供了思路。
In order to analyze the uncertainty existing in the tunneling project, the stochastic finite element method is proposed to study the stress-displacement characteristics after tunnel excavation. Taking a deep tunnel as an example, the stress and displacement characteristics of the tunnel after excavation are analyzed by finite element method and finite element method respectively. The results show that after the stochastic finite element method is adopted, The stress and surrounding rock displacement around the tunnel are no longer determined values, but are random variables with statistical properties. Due to the uncertainty of load and parameters in the project, the random finite element is more realistic than the deterministic finite element, which provides the idea for similar engineering research.