铁路黄土隧道微台阶法快速施工技术研究

Study on Rapid Construction Technology of Railway Loess Tunnel by Micro-step Method

通过对微台阶工法在铁路黄土隧道施工中的应用,总结微台阶工法的特点及优缺点,研究微台阶工法在第四系全新统冲洪积粉质黏土、上更新统风积新黄土、中更新统风积老黄土地质铁路隧道施工中的适用性,充分发挥隧道内作业空间,合理配置资源,优化各工序作业顺序,快速进行初支封闭,保证了黄土隧道施工安全和质量,加快了黄土隧道施工进度。

Through the application of micro-step method in railway loess tunnel construction, this paper summarizes its characteristics and the advantages and disadvantages, researches the applicability of micro-step method in railway tunnel construction with Holocene alluvial silty clay, upper Pleistocene eolian loess and middle Pleistocene eolian loess, gives full play to the working space in the tunnel,allocates resources rationally, optimizes the process operation order, and quickly closes the initial support, so as to ensure the safety and quality of loess tunnel construction, and speed up the construction progress of loess tunnel.