隧道单层衬砌结构稳定性现场试验及变形控制

从研究隧道单层衬砌结构的支护稳定性入手,以现场实验手段,对工作过程中锚杆、纤维凝土以及其与围岩相互作用的力学原理进行了系统研究,对单层衬砌在隧道工程实际应用中的力学性能进行了测量,在此基础上阐述了隧道单层衬砌机理,并最终应用于工程实践,初步形成一套具有理论支撑的单层衬砌设计方法。认为纤维混凝土与围岩密贴效果良好,表明提出的单层衬砌设计方法在保证工程质量和安全方面是可行的,支护结构的工作性状可靠。

Field test and deformation controlling for single tunneling lining stability

The construction process of anchor,fiber concrete and its mechanical principle of interaction with surrounding rocks is studied by field tests from the view of researching stability of single layer tunneling lining. The mechanical properties of single layer lining in the practical application of tunnel engineering are measured. On the basis of this study,the mechanism of single layer tunnel lining is discussed,which is finally applied to the engineering practice,formatting a set of theoretical support for the design method of single layer lining. Studies found that close effect between fiber reinforced concrete and rock is well,which shows that the single layer lining design method to ensure quality and safety proposed in this paper is feasible,and construction characteristic of retaining structure is reliable. The method can be widely applied in engineering practice,and has remarkable economic benefit and social benefit.