隧道支护优化分析及施工监测技术
发布时间:2018-04-22 00:34
本文选题:公路隧道 + 监测 ; 参考:《河北工业大学》2014年硕士论文
【摘要】:本文阐述了国内外监控量测理论的发展现状,研究了隧道衬砌结构设计,然后针对公路隧道的具体情况,进行了隧道支护结构数值模拟分析和现场监控量测。对某公路隧道初衬及二次衬砌的厚度进行了优化分析,得出如下主要结论: (1)通过某公路隧道的施工监控量测和FLAC3D数值模拟分析,对隧道的支护参数进行了优化,二次衬砌由原来的70cm减薄到V级围岩45cm,Ⅳ级围岩35cm,Ⅲ级围岩30cm。现场监测表明,隧道采用减薄二次衬砌结构厚度的设计方案,不仅具有很强的可操作性,而且施工过程经济合理,安全可靠。 (2)选择了不同类型(Ⅲ、Ⅳ、Ⅴ级)围岩测试段进行现场测试,并对工程施工安全和结构可靠性进行评价;并结合公路隧道工程特点,选择Ⅲ、Ⅳ、Ⅴ级围岩的三种不同支护衬砌结构,采用FLAC分析软件,对初衬及二次衬砌受力进行仿真计算,,从理论上评价了隧道围岩稳定性和支护效果。 (3)现场监测数据表明,初期支护与二次衬砌间的垂直接触压力较小,水平接触压力较大,由此推测,接触压力的大小与围岩类型有密切的联系,且二次衬砌结构的确起到了承受荷载的作用。
[Abstract]:In this paper, the development status of monitoring and measurement theory at home and abroad is described, and the design of tunnel lining structure is studied. Then, the numerical simulation analysis and field monitoring measurement of tunnel supporting structure are carried out according to the concrete situation of highway tunnel. The thickness of primary and secondary lining of a highway tunnel is optimized and analyzed. The main conclusions are as follows: 1) through the construction monitoring measurement and FLAC3D numerical simulation analysis of a highway tunnel, the supporting parameters of the tunnel are optimized. The secondary lining is reduced from original 70cm to V grade surrounding rock 45 cm, 鈪
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