拱形棚洞在公路高边坡灾害防治中的应用  

Application of hangar tunnel in disaster prevention of road high slope

作　　者：贾艳领 夏永旭[1] 韩兴博[1] 周勇狄[1,2] JIA Yanling;XIA Yongxu;HAN Xingbo;ZHOU Yongdi(School of Highway,Chang′an University,Xi′an,Shaanxi 710064,China;Survey&Design Institute,Guangxi Transportation Research&Consulting Co.,Ltd.,Nanning,Guangxi 530007,China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]广西交通科学研究院有限公司勘察设计事业部,广西南宁530007

出　　处：《江苏大学学报（自然科学版）》2018年第6期714-720,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：广西科学研究与技术开发计划项目(桂科攻1355008-3)

摘　　要：针对沿河傍山公路、陡峭山腰公路等交通咽喉路段容易发生高边坡灾害,造成交通堵塞,且妨碍救灾的情况,考虑到场地条件、施工难度、行人安全和工程结构的可靠性、便利性及防排水等因素,以龙胜至资源公路高边坡路段灾后复建工程为依托工程,选用了拱形棚洞结构方案,以防治高边坡灾害.采用有限元软件,对不同工况下的拱形棚洞结构受力情况进行了验算.计算结果显示:棚洞各构件的受力均在安全范围内;对受力较大构件进行优化设计,提高了结构承载能力和安全系数;在运营阶段经历滑坡以及落石等高边坡灾害后,拱形棚洞结构未发现明显病害,且该路段交通未受影响.The high slope geological disaster is easily happened,and it can block the transportation and delay the disaster relief in choke points of mountainside roads.Considering site condition,construction difficulty,tunnel safety,structure reliability,convenience and waterproof,the hangar tunnel scheme was applied in the section of Longsheng-Ziyuan road line.The finite element analysis software was used to calculate the forces of hangar tunnel structure under different situations.The results show that the force of the main parts of hangar tunnel is in safety range.The structure design with high force is optimized to enhance the safety factor of hangar tunnel.After experiencing high slope disasters of landslides and falling rocks during the operation phase,no obvious diseases are found in the arched hangar tunnel structure,and the traffic on the section is not affected.

关 键 词：拱形棚洞 公路 灾害防治 高边坡灾害 数值模拟 

分 类 号：U452.25[建筑科学—桥梁与隧道工程]