新旧立体交叉隧道系统力学耦合作用全过程与规律
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摘要
新旧立体交叉隧道系统耦合演化的非线性规律研究尚处于探索阶段。基于穿越过程中与工后的新旧立体交叉隧道系统耦合作用过程与机制分析,定量分析了其耦合作用中应力与位移状态变化的全过程;根据隧道稳定性非线性分析,分别从岩土体的黏弹塑性、动力学与能量耗散等3方面研究了立体交叉隧道非线性演化规律,并建立了其发生耦合作用的黏弹塑性、动力学与能量的标准及其演化函数;在此基础上,系统总结了新旧立体交叉隧道系统耦合演化总体特征,指出其耦合区域在空间上具有拓展性,耦合演化在时间上具有延续性。其研究结果为立体交叉隧道稳定性定量分析与控制研究提供了新思路。
Research on the whole process and nonlinear law for coupling evolution of new and old overlapped tunnel systems is still in exploring stage.Based on the coupling mechanism analysis of the overlapped tunnel systems in undercrossing and after construction,the whole change processes of stress state and displacement state are quantitatively analyzed in its coupling.According to the nonlinear analysis of tunnel stability,the nonlinear law for coupling evolution is studied from viscoelasto-plasticity,dynamics and energy dissipation.The coupling standard and evolution function are established.On this basis,the general characteristics of coupling evolution are systematically summarized.The expansibility in space and furtherance in time of the coupling mechanism are also pointed out.Such kind of study is able to provide valuable theoretical guidance for stability quantitative analysis and control of overlapped tunnels.
引文
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