Table 5 Numerical simulation conditions with different spacing of double-row capsule grouting.

From: Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting

Group

Horizontal spacing (S)/m

Distance from the tunnel boundary(W)/m

First row

Second row

1

4

4

3

2

8

3

16

4

4

4

2

5

8

6

16

7

4

3

2

8

8

9

16

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