软弱破碎围岩隧道施工技术  

Construction Techniques for Tunnels with Weak Surrounding Rock

作　　者：李国英[1,2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]中铁十六局集团第五工程有限公司,河北唐山063030

出　　处：《国防交通工程与技术》2009年第5期43-46,共4页Traffic Engineering and Technology for National Defence

摘　　要：以长梁山特长、大断面软岩隧道工程为实例,针对软弱层状、断层破碎地质等特殊岩体,研究提出了合理的洞室开挖方案和支护参数。针对此类特殊地层中传统挂网喷射混凝土抵受不住膨胀压力而造成坍塌掉块问题,研究设计了一种新型"蜘蛛网状系统锚固技术"。通过实践证明施工效果良好,对于类似条件下的隧道施工具有借鉴意义。With the construction of the Changliangshan super-long and large cross-section tunnel, which is located in a weak surrounding rock stratum, as a practical example,studied and put forward in the paper are the rational tunneling scheme and bracing parameters, which aim at such special rock quality as soft layered strata and broken faults. Aiming at solving the problem of rock-falling in such special strata resulting from the traditional netting-shot concrete not being strong enough to resist expansion pressure, a new type of spider-web-shaped systematic anchoring technique is studied and developed. Practice shows that the above-mentioned technique works well in construction, which may serve as a useful reference for the construction of other similar tunnel projects in similar geological conditions.

关 键 词：长梁山隧道 层状地层 软弱围岩 支护 锚固 

分 类 号：U455[建筑科学—桥梁与隧道工程]