Mathematical Problems in Engineering / 2019 / Article / Tab 9

Research Article

Evaluation of Ground Surface Pregrouting in a Mountain Tunnel Based on FAHP

Table 9

Definitions of the evaluation results for each index.

IndexSymbol Range of each evaluation resultTest data
ExcellentGoodModerateBad

Increase rate of sound velocity in single-borehole test (%)P11>1510–155–10<516
Increase rate of sound velocity in double-borehole test (%)P12>1510–155–10<57
Curve types of water pressure testP21ABCDA: 60%, B:27%, C: 7%, D: 7%
Decrease rate of permeability rate (%)P22>8060–8040–60<4090
Increase rate of the unconfined compressive strength of rock samples (%)P31>1510–155–10<513

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