Abstract: This paper presents a case history an inclined shaft at Huangdao end of Qingdao Jiaozhou Bay Second Subsea Tunnel. The design aspects of the longitudinal profile and the cross section of the inclined shaft for the long tunnel are introduced. Considering the needs of the auxiliary construction, hazard prevention and rescue and operation services of the inclined shaft, the design procedure of the longitudinal profile and cross section of the inclined shaft meeting the requirements is proposed. The longitudinal slope of the inclined shaft is a combined slope of 10% (200 m) + 3% (60 m). The speed limit during construction is 5 km per hour and 20 km per hour during operation. The design of inclined shaft cross section needs to meet the needs of building clearance with different functions during the construction, emergency rescue and operation services. After the completion, it will be retained as a service and emergency rescue tunnel, which will greatly improve the emergency rescue capacity in case of emergencies and provide convenience for the later operation and the maintenance of the tunnel.

Key words: jiaozhou bay second subsea tunnel, inclined shaft, cross section, profile, construction clearance, comprehensive benefit