新旧立体交叉隧道系统力学耦合作用全过程与规律  

Whole process and law for mechanical coupling evolution of new and old overlapped tunnel systems

作　　者：刘镇[1,2] 周翠英[1,2] 

机构地区：[1]中山大学工学院,广州510275 [2]中山大学岩土工程与信息技术研究中心,广州510275

出　　处：《岩土力学》2012年第2期494-500,538,共8页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.41030747;No.41102181);教育部博士学科点基金项目(No.20090171110044;No.20110171120017);广东省自然科学基金项目(No.S2011020001229;No.S2011010002104);广东省科技计划项目(No.2010A030200007);广东省高层次人才计划项目(No.5221001);广州市科技支撑计划项目(No.2010GN-D00011);广州市科技计划应用基础研究重点项目(No.11C42050727)

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.

关 键 词：立体交叉隧道 耦合作用 非线性规律 全过程 

分 类 号：U455[建筑科学—桥梁与隧道工程]