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From page 209... ... 209 a p p e N D I x p Introduction A survey of several tunnels linings was carried out with a portable seismic property analyzer (PSPA) within the framework of the SHRP 2 Renewal Project R06G. Read the entire page →
From page 210... ... 210 Figure P.1. Schematic illustration of the test methods. Read the entire page →
From page 211... ... 211 west of Denver, Colorado, on I-70. The tunnel is about 1.7-mi long, and the plenum is up to 18-ft high, with a nominally 2-ft-thick liner. Read the entire page →
From page 212... ... 212 19 sections (from Section 148 to Section 166) were investigated on October 4 in the westbound bore. Read the entire page →
From page 213... ... 213 frequency of around 3.5 kHz approximately corresponds to the thickness of the liner (2 ft) , whereas the frequency of 6.8 kHz for the shallow delamination approximately corresponds to a thickness of 1 ft. Read the entire page →
From page 214... ... 214 (a) Good condition (b) Read the entire page →
From page 215... ... 215 Longitudinal Axis Fr eq ue n cy (H z ) 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x 104 0 0.2 0.4 0.6 0.8 1 Longitudinal Axis Fr eq ue n cy (H z ) Read the entire page →
From page 216... ... 216 Figure P.8. Photographs of intact and defective points along with representative dispersion curve for both points, in Eisenhower Memorial Tunnel. Read the entire page →
From page 217... ... 217 Figure P.9. Variation of modulus with depth, in Eisenhower Memorial Tunnel. Read the entire page →
From page 219... ... 219 indicates intact areas. On the remaining areas, mostly high frequency governs the response, which is an indication of a deep (but not extensive) Read the entire page →
From page 220... ... 220 Longitudinal Axis Fr eq u en c y (H z ) P1P2P3P4P5P6 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x 104 0 0.2 0.4 0.6 0.8 1 N orm alized Am plitude Figure P.13. Read the entire page →
From page 221... ... 221 Figure P.15. Variation of apparent modulus with depth along Hanging Lake Tunnel. Read the entire page →
From page 222... ... 222 Longitudinal Axis De pt h (in ch es ) P1P2P3P4P5P6 2 4 6 8 10 12 2000 3000 4000 5000 6000 Apparent M oduli (ksi) Read the entire page →
From page 223... ... 223 The data used in Figure P.19 were actually from three separated intact spots within a distance of about 20 ft. Since they have the similar feature, the results are represented together. Read the entire page →
From page 224... ... 224 (a) B-scans of amplitude spectrum (b) Read the entire page →
From page 225... ... 225 (a) B-scans of amplitude spectrum (b) Read the entire page →
From page 226... ... 226 Figure P.22. PSPA results on plenum ceiling in area 477+60, in Chesapeake Channel Tunnel. Read the entire page →
From page 227... ... 227 Figure P.23. PSPA results on plenum ceiling in area 478+85, in Chesapeake Channel Tunnel. Read the entire page →
From page 228... ... 228 Figure P.25. PSPA results on plenum ceiling in area 486+67, in Chesapeake Channel Tunnel. Read the entire page →
From page 229... ... 229 Figure P.26. PSPA results on plenum ceiling in area 486+81, in Chesapeake Channel Tunnel. Read the entire page →
From page 230... ... 230 Figure P.27. PSPA results on plenum ceiling in area 491+25, in Chesapeake Channel Tunnel. Read the entire page →
From page 231... ... 231 Figure P.28. PSPA results on plenum ceiling in area 493+15, in Chesapeake Channel Tunnel. Read the entire page →
From page 232... ... 232 Figure P.30. PSPA results on wall of roadway, in Chesapeake Channel Tunnel. Read the entire page →
From page 233... ... 233 Appendix P1 The remaining line scans and planar variations of modulus are presented here. Longitudinal Axis Fr eq u en cy (H z ) Read the entire page →
From page 234... ... 234 Longitudinal Axis Fr eq u en cy (H z ) Line 3 123456 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x 104 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Longitudinal Axis Fr eq u en cy (H z ) Read the entire page →
From page 235... ... 235 Longitudinal Axis Fr eq u en cy (H z ) Line 7 123456 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 x 104 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Figure P1.1. Read the entire page →
From page 236... ... 236 Figure P1.2. (Continued.) Read the entire page →
From page 237... ... 237 references Carino, N Read the entire page →

From page 209...

... 209 a p p e N D I x p Introduction A survey of several tunnels linings was carried out with a portable seismic property analyzer (PSPA) within the framework of the SHRP 2 Renewal Project R06G.