软岩隧道围岩塌方的尖点突变预测分析

发布时间：2018-03-05 09:25

本文选题：软岩隧道　切入点：围岩塌方　出处：《铁道工程学报》2016年11期 　论文类型：期刊论文

【摘要】：研究目的:隧道塌方事故往往会伴随重大的财产和经济损失,严重时还会危及隧道内人员的人身安全。隧道塌方的预测研究一直是隧道工程的一项科研难题,但目前国内外针对软岩隧道塌方的研究却较少。软岩隧道的塌方经历瞬时应变到蠕变再到突然破坏的过程,具有突发性和不确定性。因此展开软岩隧道围岩塌方的预测研究,对于避免塌方事故造成损失具有重要意义。研究结论:(1)以十房高速公路某隧道塌方事故为背景,在尖点突变理论的基础上,建立软岩隧道的突变失稳预测模型,推导出围岩失稳判据;(2)结合现场监测数据对尖点突变失稳预测模型进行验证,通过预测模型判断出隧道围岩稳定性,计算隧道从支护到塌方的时间为48.045 d,与实际情况的49 d较为吻合;(3)该研究成果可以在实际工程中预测软弱围岩塌方的时间,为避免塌方灾害事故并采取相应措施提供依据。
[Abstract]:Research purposes: tunnel collapse accidents are often accompanied by significant property and economic losses, and also endanger the safety of people in the tunnel. The prediction of tunnel collapse is always a difficult research problem in tunnel engineering. However, there are few researches on soft rock tunnel collapse at home and abroad. The collapse of soft rock tunnel is sudden and uncertain in the process of transient strain, creep and then sudden failure. Therefore, the prediction research of soft rock tunnel surrounding rock collapse is carried out. It is of great significance to avoid the loss caused by collapse accident. Conclusion: 1) based on the cusp catastrophe theory, the prediction model of sudden change instability of soft rock tunnel is established based on the collapse accident of a tunnel on Shifang Expressway. Based on the field monitoring data, the prediction model of sudden change instability of surrounding rock is verified, and the stability of tunnel surrounding rock is judged by the prediction model. The time from support to collapse of tunnel is 48.045 days, which is in good agreement with the actual situation (49 days). The research results can predict the time of collapse of weak surrounding rock in practical engineering, and provide the basis for avoiding the disaster of collapse and taking corresponding measures.
【作者单位】：武汉地铁集团有限公司;长江水利委员会长江科学院材料与结构研究所;中国地质大学(武汉);
【分类号】：U458.3

【相似文献】