【摘要】 以工程实例为背景,对隧道洞口段施工过程中围岩的收敛变形、锚杆作用应力、一次衬砌、二次衬砌内的应力与变形以及围岩的压力进行观测,取得大量的试验数据,并结合数值计算结果进行分析,为隧道衬砌设计和施工的安全可靠性提供科学依据和技术指导,并为进一步的工程研究积累资料。更多还原

【Abstract】 Taking a tunnel engineering case as background,this paper makes multiple measurements during the construction process of tunnel’s portal section,including convergence deformations of surrounding rocks,stresses of bolts,stresses and deformations of primary and secondary liners,which give a great number of testing data.On this basis,numerical analysis is performed,the results provide reliable and scientific basis for both design and construction salty of the liners.Not only can all this work guide constructing technique of the tunnel under consideration but also accumulate valuable referential data for the projects of the same kind.更多还原