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Table 4 Computation results of the groundwater pressure head and flow velocity at the section of K13 + 785 to K13 + 831

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-001-01

8.00

39.20

8.87

443,654

27.40

27.22

2

Y2DS-001-02

8.00

55.90

12.65

632,659

44.93

43.95

3

Y2DS-001-03

8.00

55.10

12.47

623,605

44.95

42.63

4

Y2DS-001-04

8.00

46.10

10.43

521,746

33.90

33.66

5

Y2DS-001-05

8.00

6.20

1.40

70,170

10.78

10.78

6

Y2DS-001-06

8.00

6.20

1.40

70,170

10.78

10.78

7

Y2DS-001-07

8.00

18.40

4.16

208,246

14.14

14.09

8

Y2DS-001-08

8.00

37.59

8.51

425,432

26.03

24.87

9

Y2DS-001-09

8.00

0.20

0.05

2264

10.34

10.34

10

Y2DS-001-10

8.00

0.60

0.14

6791

10.34

10.34

11

Y2DS-001-11

8.00

197.50

44.70

2,235,245

439.74

427.93

12

Y2DS-001-12

8.00

179.40

40.61

2,030,394

364.73

354.56

13

Y2DS-001-13

8.00

10.24

2.32

115,893

11.53

11.52

14

Y2DS-001-14

8.00

0.34

0.08

3848

10.34

10.34

15

Y2DS-001-15

5.00

1.08

0.24

12,223

10.35

10.35

16

Y2DS-001-16

5.00

1.45

0.33

16,411

10.36

10.36

17

Y2DS-001-17

4.00

0.26

0.06

2943

10.34

10.34

18

Y2DS-001-18

4.00

0.62

0.14

7017

10.34

10.34

19

Y2DS-001-19

4.00

0.52

0.12

5885

10.34

10.34

20

Y2DS-001-20

4.00

0.52

0.12

5885

10.34

10.34