Advances in Civil Engineering / 2018 / Article / Tab 2

Research Article

Numerical Modeling for Engineering Analysis and Designing of Optimum Support Systems for Headrace Tunnel

Table 2

Parameters for numerical modeling.

Geotechnical unitUnit weight (g/cm3)Modulus of elasticity (MPa)Poisson’s ratio ()Hoek and Brown constantsVertical stress (MPa)Horizontal stress (MPa)RMR supportQ-system support
mbsa

GU-12.713.41e40.1887.6690.01170.50319.005.23Locally, 3 m long bolts in crown of 20 mm diameter and fully grouted, spacing between bolts of 2.5 m with occasionally wire mesh, shotcrete with a thickness of 50 mm where necessary, and no steel set required2 m long systematic bolting (fully grouted with 20 mm diameter) with a spacing of 2.32 m between bolts; fiber-reinforced sprayed concrete of 50–60 mm thickness at crown

GU-22.763.42e40.0511.9340.00600.50411.702.064 m long systematic bolts of 20 mm diameter and fully grouted, spacing range between bolts of 1.5–2 m in crown and walls with wire mesh in crown, shotcrete with a thickness range of between 50 mm and 100 m in crown and 30 mm in the sides of tunnel, and no steel set required2 m long systematic bolting (fully grouted with 20 mm diameter) with a spacing of 2.5 m between bolts; fiber-reinforced sprayed concrete of 50–60 mm thickness at crown

GU-32.695e40.2776.1540.02560.50211.603.02Locally, 3 m long bolts in crown of 20 mm diameter and fully grouted, spacing between bolts of 2.5 m with occasionally wire mesh, shotcrete with a thickness of 50 mm where necessary, and no steel set required2 m long systematic bolting (fully grouted with 20 mm diameter) with a spacing of 2.48 m between bolts; fiber-reinforced sprayed concrete of 50–60 mm thickness at crown

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