Table 3 Direct impact matrix O.

From: Research on risk factors identification and optimization strategies for railway tunnel construction in ecologically sensitive areas

Factor

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

S15

S16

S17

S1

0

21

6

9

11

17

15

20

11

10

15

15

11

9

3

18

12

S2

13

0

6

14

7

9

12

11

11

10

12

13

12

13

7

23

13

S3

7

13

0

12

5

5

17

13

12

19

16

15

14

17

7

13

11

S4

20

23

12

0

6

11

9

12

18

14

20

17

16

14

9

20

16

S5

5

9

7

6

0

22

10

19

15

15

14

15

12

12

8

10

9

S6

7

11

10

7

21

0

13

19

17

15

16

14

14

14

9

14

14

S7

7

13

6

6

14

18

0

14

15

21

15

14

14

11

8

13

14

S8

8

10

9

9

14

15

8

0

23

18

17

14

15

11

11

12

11

S9

9

7

7

5

20

12

6

17

0

7

17

12

14

12

14

13

16

S10

7

8

6

5

15

13

4

13

7

0

9

20

10

8

17

8

15

S11

11

9

11

6

11

11

7

11

12

10

0

10

11

9

11

12

10

S12

12

12

6

5

6

9

9

12

13

8

9

0

7

16

13

17

17

S13

9

13

4

8

10

3

6

8

10

6

8

8

0

15

17

17

21

S14

10

12

5

6

9

6

9

8

12

5

22

13

16

0

7

16

21

S15

7

10

4

4

5

4

9

8

9

4

20

12

17

5

0

19

25

S16

15

15

9

9

10

7

14

19

13

11

15

15

20

17

18

0

11

S17

11

14

8

11

8

8

7

15

15

20

11

16

18

19

20

11

0

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