Numerical Analysis and Deformation Mechanism Study on an Excavated High-Steep Slope of a Hydropower Station

Table 1

Mechanical parameters of slope rock mass.

Lithology	Unloading relaxation	Bulk density	Deformation modulus E (GPa)		Poisson’s ratio μ	Shear strength
						f		c (MPa)
			Geological suggestion	Inversion parameter		Geological suggestion	Inversion parameter	Geological suggestion	Inversion parameter
(IV2)	Non-unloaded	26.8	1-2	2	0.33	0.5–0.7	0.7	0.2–0.4	0.4
	Unloaded	26.6	—	1	0.35	—	0.42	—	0.2
(IV1)	Non-unloaded	26.8	3–5	5	0.3	0.7-0.8	0.7	0.4-0.7	0.7
	Unloaded	26.7	—	2.5	0.33	—	0.42	—	0.35
(III2)	Non-unloaded	26.8	5–7	7	0.26	0.40.9	1	0.7-0.9	1
	Unloaded	26.7	—	4	0.3	—	0.8	—	0.7
Pt21 (IV2)	Non-unloaded	26.8	1-2	2	0.33	0.5–0.7	0.7	0.2–0.4	0.4
	Unloaded	26.6	—	1	0.35	—	0.42	—	0.2
Pt21 (IV1)	Non-unloaded	26.8	3–5	5	0.3	0.7-0.8	0.7	0.4–0.7	0.7
	Unloaded	26.7	—	2.5	0.33	—	0.42	—	0.35
Pt21 (III2)	Non-unloaded	26.8	5–7	7	0.26	0.8-0.9	1	0.7–0.9	1
	Unloaded	26.7	—	4	0.3	—	0.8	—	0.7
Z2g (IV2)	Non-unloaded	26.8	1-2	2	0.33	0.5–0.7	0.7	0.2–0.4	0.4
	Unloaded	26.6	—	1	0.35	—	0.42	—	0.2
Huashangou fault cataclasite-crushed stone	Non-unloaded	26.6	1	1	0.33	0.5	0.5	0.2	0.2
	Unloaded	26.6	—	0.6	0.35	—	0.25	—	0.1
Huashangou fault-clay mingled with debris		20	0.15	0.15	0.36	0.25–0.35	0.25	0.01–0.05	0.01
Z2d		27.3	5–7	10	0.3	0.8-0.9	1	0.7–0.9	1
P3em and P2y		27	14–18	18	0.25	1.0–1.2	1.2	1.2–1.4	1.4
J2x, Jl, and T3bg		27	5–10	10	0.28	0.8–1	1	0.5–0.7	1