基于范例推理的浏阳河隧道风化槽段坍方风险评估  

Case-based Reasoning Assessment on Tunnel Collapse Risk of the Weathered Trough Section of Liuyang River Tunnel

作　　者：安永林[1,2] 彭立敏[2] 张峰[3] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]中南大学土木建筑学院,湖南长沙410075 [3]中国中铁四局集团有限公司,安徽合肥230023

出　　处：《灾害学》2009年第3期75-78,共4页Journal of Catastrophology

基　　金：湖南省研究生创新基金项目(3340-74236000004);中铁四局科技研究开发计划课题(2006-19)

摘　　要：坍方是隧道常见的突发性风险事件。在对已有坍方隧道实例的原因进行了统计分析,并对主要原因进行了力学解释后,进一步应用范例推理方法评估了浏阳河隧道风化槽地段的坍方风险。结果表明:隧道坍方的主要诱因是围岩破碎和降雨,这与断层破碎带处的围岩力学性能差、降水弱化围岩力学性和降低围岩有效应力等有关。浏阳河隧道风化槽地段的范例推理的坍方和梁家山隧道相近,风险为很有可能发生坍方,建议该地段施工中应注重监测信息的反馈并做好超前地质预报。Collapses are common tunnel accidents. Causes of some tunnel collapse examples are statistically analyzed and the important ones of them are mechanically explained. Collapse risk of the weathered trough section of Liuyang River Tunnel is evaluated afterwards by case-based reasoning. It is shown that the main inducing factors of tunnel collapses are weak rock and rainfall, for weak rock has very poor mechanical properties and would weaken rock mechanics and reduce the effective stress in surrounding rock. Collapse risk of Liuyang River Tunnel is likely to occur. It is suggested that more attention should be paid to monitoring information feedback and geological prediction.

关 键 词：隧道坍方 范例推理 风险评估 浏阳河隧道 

分 类 号：U459.2[建筑科学—桥梁与隧道工程] U458[交通运输工程—道路与铁道工程]