Table 4 Acoustic monitoring data of each measuring point.
From: Cumulative damage characteristics of tunnel initial support concrete under blasting load
Measuring point | Longitudinal wave speed /(mÛ°s-1) | Â | |||||
|---|---|---|---|---|---|---|---|
Cp0 | Cp1 | Cp2 | Cp3 | Cp4 | Cp5 | Cp6 | |
1 | 1400 | 1261 | 1235 | 1200 | 1183 | 1155 | 1145 |
2 | 1450 | 1323 | 1302 | 1273 | 1258 | 1235 | 1215 |
3 | 1361 | 1262 | 1248 | 1225 | 1214 | 1196 | 1178 |
4 | 1388 | 1310 | 1300 | 1281 | 1273 | 1259 | 1243 |
5 | 1305 | 1255 | 1248 | 1237 | 1230 | 1223 | 1211 |
6 | 1279 | 1254 | 1251 | 1245 | 1242 | 1238 | 1233 |
