Rotary excavation construction | Xiaojinzhong Metro Station, Baiyun District, Guangzhou

Project Location:Guangzhou City, Guangdong Province

Device Model:SR505

Pile diameter:1000mm, 1200mm, occlusive pile

Pile Depth:22~33m

Geology:Silt, sand, weathered limestone layers, there are oblique rocks, which need to pass through the inclined rock layers to enter the stable rock face

Construction technology:Mud wall protection construction

Construction Method:Due to the existence of more than 10 meters of inclined rock, it is easy to deviate the hole, oblique hole, stuck drilling, and bite in the construction process;

To this end, it is necessary to use a customized heightened, thickened, structure-strengthened, and optimized tooth picks for correction, and the verticality in the hole can be observed at any time during the operation process by slowly pressurizing and scanning the hole. Pick barrel drill and pick sand bucket cooperate with construction drilling;The whole hole forming time is 10~12h.