钓鱼台隧道复杂围岩设计施工过程关键块确定技术

发布时间：2018-05-15 16:58

本文选题：最大块体 + 定位块体　；参考：《现代隧道技术》2017年03期

【摘要】：关键块体在某种程度上控制着节理隧道施工的稳定性,同时存在着安全隐患。在设计和施工过程中,及时确定关键块体可减少工程事故的发生。文章结合辽宁境内高速公路钓鱼台隧道工程,采用块体理论和团队开发程序GeoSMA-3D系统,在现场调查的基础上对其进行不定位块体、定位块体和随机块体的搜索和初步确定,并分析了该隧道块体的稳定性。不定位块体分析中,给出三组结构面下,开挖面上可能形成的最大关键块体理论计算方法;定位块体分析中,根据确定性结构面信息,搜索开挖面上的关键块体;随机块体分析中,采用三维不接触系统对随机结构面进行测量统计,并搜索确定结构面与随机结构面共同作用下的有限块体和关键块体。三种不同块体的分析方法相互补充,从不同方面为工程设计及施工提供了依据。
[Abstract]:The key blocks control the stability of jointed tunnel construction to some extent, and there are hidden dangers in safety at the same time. In the process of design and construction, determining the key blocks in time can reduce the occurrence of engineering accidents. Combined with the Diaoyutai Tunnel Project of Liaoning Expressway, using block theory and team development program GeoSMA-3D system, on the basis of field investigation, the paper carries out the search and preliminary determination of unlocated block, location block and random block. The stability of the tunnel block is analyzed. In the analysis of unlocated blocks, the theoretical calculation method of the largest key blocks that may be formed on the excavated surface under three groups of structural planes is given, and the key blocks on the excavated surface are searched according to the information of deterministic structural plane in the analysis of the locating blocks. In the random block analysis, the measurement and statistics of the random structural plane are carried out by using the three-dimensional non-contact system, and the finite blocks and the key blocks under the joint action of the structural plane and the random structural plane are searched. The analysis methods of three different blocks complement each other and provide the basis for engineering design and construction from different aspects.
【作者单位】：东华理工大学江西省数字国土重点实验室;东华理工大学建筑工程学院;东北大学资源与土木工程学院;
【基金】：国家自然科学基金资助项目(U1602232) 江西省自然科学基金资助项目(20161BAB216144) 江西省教育厅科学技术研究项目(150578) 江西省数字国土重点实验室开放基金项目(DLLJ201607)
【分类号】：U455.4

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