摘要
登攀隧道进口段被残坡积土层所覆盖,且有大小不等(玄武岩球状风化物)孤石呈不均匀分布。为了解决隧道地表仰坡滑移、初期支护失稳的工程问题,首先分析了玄武岩球状风化物形成过程及其对隧道施工的危害;然后从经济、工期和环境影响几个方面入手,采用模糊数学理论对动态施工方案进行比选,并采取变形监控量测手段,结合监测数据对动态施工方案的有效性进行分析和验证。施工中采取的加强洞内支护、控制施工扰动和防排水措施的削坡加载方案,使围岩大变形和仰坡失稳的工程问题获得了解决。
The portal of the Dengpan tunnel is covered by soil, deposits, and boulders of various sizes and is charac- terized by spheroidal weathering of the basalt. In order to inhibit slope failure and large deformation, the forming pro- cess of spheroidal weathering and its harm to tunnel eonstruction were analyzed. Selection of construction options was made by fuzzy mathematics. Additionally, based on the deformation monitoring data, the effectiveness of the con- struction scheme was analyzed and verified. By taking such measures as support reinforcement, control of construc- tion disturbances, and waterproofing and drainage, problems concerning deformation and slope instability were solved
出处
《现代隧道技术》
EI
北大核心
2012年第6期147-151,157,共6页
Modern Tunnelling Technology
基金
国家自然科学青年基金资助项目(No51108397)
关键词
球状风化
隧道
模糊决策
Spheroidal weathering
Tunnel
Fuzzy decision
