路基塌陷段组合式桥梁应急修复技术及计算方法  

Emergency Repair Technology and Calculation Method for Combined Combat Readiness Bridge during a Subgrade Collapse

作　　者：陈洪凯[1,2] 廖学海 张金浩[2] CHEN Hongkai;LIAO Xuehai;ZHANG Jinhao(Institue of Geotechnical Engineering,Chongqing Jiaotong University,Chongqing 400071,China;School of city and architecture engineering of Zaozhuang University,Zaozhuang 277160,China;Nanjiang Hydrogeological&Engineering Geology Brigade of Chongqing Institute of Geology&Mineral Resources Survey,Chongqing 401147,China)

机构地区：[1]重庆交通大学岩土工程研究所,重庆400074 [2]枣庄学院城市与建筑工程学院,山东枣庄277160 [3]重庆市地质矿产勘查开发局南江水文地质工程地质队,重庆401147

出　　处：《灾害学》2021年第4期133-137,145,共6页Journal of Catastrophology

基　　金：国家重点研发计划(2018YFC1505405)。

摘　　要：在山洪、泥石流和地震等自然灾害作用下引发的路基塌陷是山区公路的典型灾害形式,其快速修复是应急抢险的重要交通保障。针对路基塌陷段公路的应急交通需求,研发了组合式战备桥梁新技术,详细解读了组合式战备桥梁的结构组成;采用超静定结构力学,建立了战备桥梁的内力计算方法;基于极限平衡理论,建立了组合式战备桥梁上部承载结构内力和承载钢绳拉力计算方法。通过实例分析表明,所建立的组合式战备桥梁计算方法完备,具有较强的工程实用性。Subgrade collapse arising from natural disasters such as mountain torrents,debris flow and earthquake,is a typical disaster form in mountain roads.Its quick repair relies on a solid protocol for emergency rescue.The combined combat readiness bridge is developed to meet the emergency traffic flow demands during a road subgrade collapse and this paper fully explicates its structural composition.With the adoption of statically indeterminate structural mechanics,the calculation methods for the internal forces of combat readiness bridge are established.Also based on the ultimate balance theory,the calculation methods for both the internal force of the upper load-bearing structure in the combined combat readiness bridge and the pulling forces in the carrying ropes are formulated.Analysis of engineering examples presented demonstrates the high precision and practicability of this calculation method for combined combat readiness bridge in the event of a segmented subgrade washout.

关 键 词：路基工程 路基塌陷 组合式战备桥梁 计算方法 快速修复 

分 类 号：U418.4[交通运输工程—道路与铁道工程] X43[环境科学与工程—灾害防治]