A trackless singlelane inclined shaft is originally designed for XGZHQ52 bid section of Guanjiao tunnel to speed up the tunnel construction. During the tunnel construction, however, the construction schedule is lagging behind the plan and many problems occur. Therefore, the original construction scheme is optimized on basis of scientific innovations and engineering experience by adopting twintube access to the main tunnel, ventilation with false ceiling and conveyor belt mucking system. Furthermore, the project management is strengthened. In the end, the problem in the construction schedule is successfully solved. The paper can be served as reference for similar projects in the future.