论文部分内容阅读
隧道不同于其他构造物,隧道内需设置安放运营管理设备的预留洞室,而在复杂地质条件下的大断面隧道中,如果预留处理不当,常导致已作支护出现开裂、大变形、渗漏水等问题,因此需要因地制宜选择合理的断面、结构形式与施工顺序。结构计算和工程实践表明:对于大断面软岩隧道或地质条件差的隧道,当洞室尺寸较大时,采用先施工主洞二次衬砌,后开挖洞室的施工顺序,可有效解决因洞室开挖可能产生的安全问题。
The tunnel is different from other structures. The reserve tunnel with operation management equipment is required to be installed inside the tunnel. In large tunnels with complex geological conditions, improper reservoirs often lead to the occurrence of cracking, deformation, Water leakage and other issues, it is necessary to select a reasonable local conditions, structure and construction sequence. Structural calculation and engineering practice show that for large section soft rock tunnel or tunnel with poor geological conditions, when the size of the cavern is large, the construction sequence of the secondary lining of the main construction cavern and the post excavation cavern can be effectively used to solve the problem Cavern excavation may produce safety problems.