ABSTRACT
Traditional sinking shaft construction methods in urban central areas with soft soil layers mainly rely on self-weight passive sinking, which has problems such as difficulty in sinking the structure, sudden sinking, and significant settlement impact. This paper proposes an Active Control Precast Press-in Shaft Machine & Method for sinking shaft equipment and construction technology. The equipment uses an underwater robot set on the cross beam of cutting-edge ring for separated section excavation at the bottom, combined with the method of pressing down and sinking by multiple area oil cylinders above the shaft, achieving underwater automated excavation for the sinking shaft and sinking of the segment structure without draining water. It can actively control the sinking speed, sinking amount, and overall attitude of the sinking shaft, and has the characteristics of high mechanization, less land occupation and impact on the surrounding environment. After being verified by simulation tests, the equipment has been successfully applied to the subway escape shaft project in Shanghai, China, showing excellent sinking control effects. In the future, this equipment and construction method will be further applied and expanded in rainwater regulation and cable vertical shafts.
