柔性钢棚洞结构在落石灾害防治中的应用研究

为了解决柔性钢棚洞结构研究和设计依据缺乏的问题,针对我国交通建设中落石灾害的广布偶发与集中群发的特点,比较了不同落石灾害防治措施在工程应用中的优缺点,分析了刚性和柔性棚洞结构的特点及在设计理论、动力性能及稳定性能等方面的研究现状;并利用有限元软件ANSYS进行数值模拟,结果表明:在相同宽度、延伸长度和防护能级的条件下,柔性钢棚洞在结构受力、施工、环保和经济性等方面具有显著优越性,特别适用于隧道、公路进出口对落石的防护,尤其是快速抢修抢建工程. 

Application of Flexible Shed-Tunnel Structure to Rock-Fall Hazard Prevention

To deal with the lack of research and design basis of flexible shed-tunnel structures, different types of protective structures for rock-fall hazards prevention and control were compared, according to the feature of widely distributed and concentrated mass of rock-fall hazards during traffic constructions in China. The structural characteristics of rigid and flexible shed-tunnel structures and the state-of-art-of in design theory, dynamic performance, stability performance, etc. were analyzed. Then, a numerical simulation was carried out using the finite element software ANSYS. The results show that under the same width, length, and protection level conditions, the flexible shed-tunnel structure has remarkable superiority in stress, construction, environmental protection, economy etc.; and hence is suitable for the rock-fall protection at the entrance and exit of highways and tunnels, especially in the emergency projects.