12 39 CT 1 2 3 1. 067000 2. 067000 3. 100191 CT CT CT CT U446 B 1673-6052 2011 12-0039 - 04 2000 24 2003 31 2009 62 6 5 57 13 23% 2003 50% 20% ~ 30% CT 2001 CT 2004 CT 16 CT 2006 CT BCT BridgeCT T CT
40 2011 dl t i = CT Lij V = n l ij v - 1 j j = 1 t L ij CT v 4 1 CT BCT BridgeCT 196km 73 28981. 6m 44. 5km 48. 36% E Vp = 槡 ρ CT 260 3. 146 R b = 0. 344Vp 2 CT CT CT CT X X CT CT 1 CT Radon 1 m /sm /s C20 2000 ~ 2500 C50 3500 ~ 4000 C30 2500 ~ 3000 C55 4000 ~ 4500 CT C40 3000 ~ 3500 C60 4500 ~ 5000 BCT CT 1 CT 3 CT 2 CT 64 CT 5μs 64 120kB 24-30 ~ + 80 3 4 CT CT
12 CT 41 1 40 2 60 3 CT CT CT 3 T 30m2m L CT 50cm 25cm 4 L L L L 4 30m 2m 64 BCT 50cm 25cm 50cm 25cm 1 2 T 1 CT 5 CT 5. 1 CT CT T T 2 3 5. 2 5
42 2011 5. 3 2010 9 11 2010 12 11 CT CT 23 260 T CT 2m 4m 2 C50 6 Lame CT 6 CT 1 1 21-4 T 7 1 21-4 T CT 4. 0km /s CT CT 3. 5 ~ 4. 0km /s C50 6 3. 5km /s CT C50 1. 5m 2 7 1 21-4 T CT 2 1 27-2T 8 27-2T C50 8 1 27-2T CT 5. 4 CT 3 CT 1. J. 2009 6 67-69. 2. J. 2006 3 32-35. 3. CT J. 2002 20 2 73-77. 4. CT J. 2001 13 1 28-32.
12 43 25m 110015 U445 B 1673-6052 2011 12-0043 - 03 1 5 3 9 ~ 11cm 2. 2 m 2. 75m 2 2. 1 1 C50 100% 14d P. O 52. 5 櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏 5. J. 7. CT NDT 2007 29 9 502-505. J. 2008 27 4 286-290. 6. CT 8. CT J. J. 2009 33 3 354-357. 2008 34 22 313-314. Bridge CT Technology and its Application in Quality Control of Bridge under Construction of Chengqin Expressway Abstract Combined with practical test of Chengqin Expressway influence of ray orthogonality ray density and element number on reliability and resolution of bridge CT imaging is discussed. The result shows that bridge CT imaging is visualized with accurate position and reliable result which could meet requirements for project quality control. Key words Bridge sound wave CT Bridge CT Structure defect Bridge quality test Nondestructive test