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Table 3 Computation results of the groundwater pressure head and flow velocity at the section of K12 + 737 to K12 + 744

From: Forecasting and prevention of water inrush during the excavation process of a diversion tunnel at the Jinping II Hydropower Station, China

No.

Grout hole

Length (m)

Water flow (L/s)

Flow velocity (m/s)

Reynolds number

Pressure head (m)

Method A

Method B

1

Y2DS-003-01

6

7.3

1.65

82,619

10.85

10.84

2

Y2DS-003-02

6

13.7

3.10

155,052

12.11

12.05

3

Y2DS-003-03

6

17.1

3.87

193,533

13.09

12.95

4

Y2DS-003-04

2

14.6

3.30

165,238

11.56

11.56

5

Y2DS-003-05

6

14.1

3.19

159,579

12.21

12.19

6

Y2DS-003-06

8

16.2

3.67

183,347

13.29

13.15

7

Y2DS-003-07

6

7.7

1.74

87,146

10.91

10.90

8

Y2DS-003-08

8

4.1

0.93

46,403

10.48

10.45

9

Y2DS-003-09

6

4.8

1.09

54,325

10.56

10.54

10

Y2DS-003-10

8

10

2.26

113,177

11.48

11.46