特大断面浅埋暗挖隧道十字岩柱开挖技术模型试验研究

发布时间：2018-06-11 14:11

本文选题：隧道工程 + 特大断面　；参考：《岩土力学》2017年10期

【摘要】：特大断面浅埋暗挖隧道是一种新型隧道,目前尚无相应的设计施工技术规范与标准可循。以重庆市轨道交通3号线红旗河沟车站隧道为工程背景,结合以前施工方法的优缺点,提出了一种新的施工方法十字岩柱法。为了解这种施工方法在施工过程中隧道围岩位移和应力的变化情况,采用地质力学模型试验方法进行研究。试验对监测断面的位移和应力进行系统监测,全方位地了解各开挖步隧道围岩各处的应力与位移变化情况。选取工程背景现场的地质参数,采用ABAQUS软件建立数值分析模型,将数值计算与试验实测结果进行对比,两者的位移与应力变化规律基本一致,这表明模型试验实测的数据比较准确地揭示了隧道围岩位移及应力变化规律。其研究工作可对今后类似工程的施工提供经验和指导。
[Abstract]:The shallow buried tunnel with oversize section is a new type of tunnel. At present, there is no corresponding specification and standard for design and construction. Taking the tunnel of Hongqi River Station in Chongqing rail transit line 3 as the engineering background, a new construction method cross column method is put forward in connection with the advantages and disadvantages of previous construction methods. In the course of construction, the change of the displacement and stress of the surrounding rock of the tunnel is studied by the geomechanical model test method. The test of the displacement and stress of the monitoring section is systematically monitored, and the changes of the stress and displacement of the surrounding rock of the tunnel are fully understood. The geological parameters of the site of the engineering background are selected and the ABAQUS is selected. The numerical analysis model is set up in the software, and the numerical calculation is compared with the experimental results. The displacement of the two is basically the same as the stress change law. It shows that the data measured by the model test accurately reveals the law of displacement and stress change of the tunnel surrounding rock. The research work can provide experience and guidance for the construction of similar projects in the future.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;武汉大学土木建筑工程学院岩土与结构工程安全湖北省重点实验室;中国科学院大学;中建南方投资有限公司;
【基金】：国家自然科学基金重点项目(No.41130742);国家自然科学基金面上项目(No.51474205)~~
【分类号】：U456

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