Abstract：
At present, long shield tunnel construction faces several difficulties in tunneling measurement accuracy control, ventilation and cooling, fire control and gas exhaustion, etc. During construction of a subway interval in Guangzhou, window cutting scheme was adopted to connect the tunnel and ground directly through ground drilling and tunnel tube hole opening and sleeve pre-embedding. This construction process is simple and safe, successfully solving the difficulties in measurement, ventilation, cooling, fire control and gas exhaustion of long distance tunneling construction.
