地下厂房硐室开挖及大体积混凝土浇筑仿真分析

发布时间：2018-10-17 12:38

【摘要】：以某水电站为工程背景,采用Autocad与FLAC~(3D)-Extruder地质建模软件建立三维数值分析模型,之后借助专业分析软件FLAC3D对地下厂房硐室开挖及大体积混凝土浇筑全过程进行三维数值模拟计算,主要研究地下厂房硐室开挖及混凝土浇筑全过程中硐室围岩的应力、应变、塑性区变化特征以及锚杆、喷层支护结构的受力特征。研究结果表明:采用分期开挖方式,在施工过程中不会出现异常情况,采用锚喷支护后,硐周的围岩稳定特性较好,锚杆和喷层受力状态较为合理,说明所采用的施工开挖方式和选择的锚喷支护参数是可行的。该研究成果具有一定的指导意义,可为工程管理、开挖支护及监测设计提供参考依据。
[Abstract]:Taking a hydropower station as the engineering background, the 3D numerical analysis model is established by using Autocad and FLAC~ (3D)-Extruder geological modeling software, and the 3D numerical simulation calculation of the whole process of underground powerhouse chamber excavation and mass concrete pouring is carried out with the help of professional analysis software FLAC3D. This paper mainly studies the stress, strain, plastic zone variation characteristics of surrounding rock of underground powerhouse during the whole process of excavation and concrete pouring, as well as the stress characteristics of bolting and shotcrete supporting structure. The results show that there will be no abnormal situation in the construction process by using the method of excavation by stages. The surrounding rock around the tunnel is stable and the stress state of bolt and shotcrete layer is more reasonable after the use of bolting and shotcrete support. It shows that the construction excavation method and the selected bolting and shotcrete support parameters are feasible. The research results have certain guiding significance and can provide reference for engineering management, excavation support and monitoring design.
【作者单位】：长沙矿山研究院有限责任公司;金属矿山安全技术国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)项目(编号:2010CB735507) 国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(编号:hunan-0010-2014AQ) 湖南省重大科技专项课题(编号:2011FJ1003)
【分类号】：TV544;TV554

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