Analysis of Structural Characteristics of Underground Cavern Group by Simulating All Cavern Excavation

Table 2

Displacement Distribution around the underground caverns. (unit: mm).

Location		T1	T2	T3
The main powerhouse	Top of the arch	−26.23	−23.36	−20.67
	Upstream side wall	26.33	22.68	21.76
	Downstream side wall	−11.58	−10.35	−9.27
The main transformer chamber	Top of the arch	−16.52	−16.78	−14.56
	Upstream side wall	14.95	15.43	13.28
	Downstream side wall	−11.13	−14.32	−12.36