Rotary excavation construction | Guangdong Shenzhen University Intercity Shenzhen Airport to Pingshan Section Project

Project Location:Shenzhen, Guangdong Province

Device Model:SR505

Pile diameter:1500mm、1800mm、2200mm

Pile Depth:40~55m

Geology:0~15m plain fill, silty clay, gravel

15m~35m full, strongly weathered granite

35m~final hole medium and slightly weathered granite, rock depth ≧2D, rock saturation compressive strength 80~100MPa

Construction technology:Mud wall protection, cone coring construction

Construction Method:The upper part adopts a pick sand bucket to drill at one time;

Graded drilling of 1.5m → 2.2m pick barrel drill and pick sand bucket with strong weathered granite;

Medium weathering and slightly weathered granite are graded with 1.5m→ 1.8m→ 2.2m cone drills and pick sand buckets;

The whole hole forming time is 1.5~2 days.