The demountable platform may have serious accidents during its operation, such as fire, instability, structure failure and load falling. It is necessary to arrange the evacuation and safe escape of platform personnel in time. A semi-submersible lifting demountable platform is examined to carry out the analysis of the possible serious accidents, the calculation of the escape time, the determination of the key points in the escape route, and the optimization of the escape route at the key points, as well as the analysis of the endurance time of the temporary refuge on the platform. The analysis results show that the personnel can evacuate in time with safeguards when an accident occurs on the platform.

This paper summarizes the basic principles of the general arrangement design for the dismantling platform. The arrangement of the lifting, power and accommodation, ballast and positioning systems are planned and designed around the lifting and accommodation functions of the platform. A design method for the key technology of the general arrangement of the semi-submersible crane dismantling platform has been presented to divide the general functional regions based on the implementation of the main functions of the platform. Under the requirements of the latest specification, the key systems of the platform is optimized and designed to provide experience and reference for the subsequent projects.