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Advances in Civil Engineering
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2020
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Article
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Tab 2
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Research Article
Assessment of the Excavation Damaged Zones in the Surrounding Rock of an Underground Powerhouse under High In Situ Stress Using an Acoustic Velocity Detecting Method
Table 2
Depth of EDZs around the main powerhouse in Houziyan project.
Position of testing boreholes
Upstream
Downstream
Elevation (m)
Section (m)
Depth of HDZ (m)
Depth of SDZ (m)
Depth of HDZ (m)
Depth of SDZ (m)
1718
0 + 008.8
5.8
10.5
12.4
19.8
1718
0 + 041.3
4.4
6.2
11.5
16
1718
0 + 73.8
3.8
9.4
6
17.7
1718
0 + 106.3
3.6
19.8
3.8
11.6
1718
0 + 152.0
8.2
9.6
2.1
4
1711
0 + 008.8
2.8
8.4
10
17
1711
0 + 041.3
5.2
10
12
14
1711
0 + 73.8
3.6
11
10
17.2
1711
0 + 106.3
6.9
11.8
10.7
11.2
1711
0 + 152.0
4.2
6.2
4.2
8.8
1704
0 + 008.8
3.2
6
10.3
14.8
1704
0 + 041.3
1.6
14.5
12
13.7
1704
0 + 73.8
3.2
13.2
4.2
12.8
1704
0 + 106.3
5.4
7.6
7.6
14
1704
0 + 152.0
3.2
8
2.4
9
1697
0 + 008.8
2.5
10.1
5.4
9
1697
0 + 041.3
5.8
18
7.3
10.2
1697
0 + 73.8
2
20.6
7.9
13.6
1697
0 + 106.3
2
12.2
2.8
6.4