基于参数敏感分析的软弱破碎地层大断面隧道爆破质量优化

发布时间：2018-01-23 05:12

本文关键词： 隧道爆破质量敏感分析软弱破碎地层优化设计　出处：《科技通报》2017年02期 　论文类型：期刊论文

【摘要】：受软弱破碎地层控制的大断面隧道爆破质量较难保证,如何针对既有的隧道爆破方案以最可靠的结论优化解决现场试验中爆破质量较难保证的难题亟待开展。本文结合改建贵昆铁路某隧道工程,对隧道爆破既有设计方案及其在开挖中存在的问题进行分析,并基于选取的隧道爆破质量敏感因素,建立了隧道爆破质量综合评价数学模型,采用极差分析法,对影响隧道爆破质量敏感因素的敏感程度进行分析并对隧道爆破方案进行优化设计,揭示了对隧道爆破质量具有显著敏感性的主要敏感因素。结果表明,提出的基于爆破质量敏感因素的敏感程度分析对软弱破碎地层隧道爆破质量进行优化设计的方法具有可操作性和实用性,能显著改善隧道爆破的质量。
[Abstract]:It is difficult to ensure the blasting quality of large section tunnel controlled by soft broken strata. How to solve the difficult problem of blasting quality in the field test with the most reliable conclusion of the existing tunnel blasting scheme is urgent to be carried out. This paper combines the reconstruction of a tunnel project of Gui-Kun Railway. The existing design scheme of tunnel blasting and the existing problems in excavation are analyzed. Based on the selected factors of tunnel blasting quality sensitivity, the mathematical model of comprehensive evaluation of tunnel blasting quality is established, and the range analysis method is adopted. The sensitivity of the sensitive factors affecting the blasting quality of the tunnel is analyzed and the optimal design of the blasting scheme is carried out. The main sensitive factors with remarkable sensitivity to the blasting quality of the tunnel are revealed. The results show that the main factors are sensitive to the blasting quality of the tunnel. The sensitivity analysis based on the sensitive factors of blasting quality is feasible and practical to optimize the blasting quality of tunnels in weak broken strata, and can improve the blasting quality of tunnels significantly.
【作者单位】：中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室;浙江科技学院土木与建筑工程学院;中铁隧道集团四处有限公司;
【基金】：教育部新世纪人才计划项目资助(No.NCET-11-1080) 国家自然科学基金资助项目(No.41602308,No41572299,No.41172292,No.41172292) 浙江省新世纪151人才第一层次(No.12-1-076) 浙江省自然科学基金资助(No.LZ13D020001,No.LQ13D020001) 浙江省公益技术应用研究计划(No.2016C33033) 浙江科技学院科研基金(No.F703104D01,No.F702104E03)
【分类号】：U455.6
【正文快照】： 隧道爆破质量受众多因素的影响,全面考虑这些影响因素在爆破实施时不具可操作性,难以在隧道爆破实践中得到普遍应用,而受软弱破碎地层控制的大断面隧道爆破现场试验实施难度和危险性均较大,且很难保证隧道爆破的质量并缺乏普遍性,如何针对既有的隧道爆破方案以最可靠的结论优

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