Stability Analysis and Parameter Optimization of Deep Excavation Supporting System in Granular Soils

Table 1

Parameters of the supporting system.

Inner support	Depth (m)	Diameter (mm)	Pipe thickness (mm)
First layer	7	609	12
Second layer	13.5	609	16
Third layer	18	800	16
Fourth layer	22.4	800	12
Inverse strut	Corner	609	12