施工技术 2011年4月上 54 CONSTRUCTION TECHNOLOGY 第40卷第338期 灌注桩超声波衰减成像技术研究 董清华，袁国清，彭土有2，林逸标3 (1.五邑大学土木建装学院，广东江门529020；2.成都理工大学信息工程学院，四川成都610059； 3.江门市交通工程质量监督站，广东江门529000) [摘要]介绍了Landweber迭代算法衰减成像原理.采用加速的Landweber选代算法对一带有空洞缺陷体的混凝 土灌注柱模型进行了超声波衰减图像重建，所得图像清晰显示出空洞的位置与形状，并与速度重建图像相比较，两 者吻合较好.对某桥梁工程灌注桩进行了衰减图像重建与速度图像重建，两者均清楚显示出缺陷体的部位，经钻 孔抽芯验证，其结果证明了该衰减成像方法的有效性. [关键词]Landweber:袁减成像；超声波：灌注桩 [中图分类号]TU473.1 [文献标识码]A [文章编号]1002-8498(2011)07-0054-03 Research on Technology of Ultrasonic Attenuation Tomography for Cast-in-place Piles Dong Qinghua' Yuan Guoqing' Peng Tuyou? Lin Yibiao (1.School of Cisil Engineering and Architecture Wuyi University Jiangmen Guangdong 529020 China; 2.College of Information Engineering Chengdu University of Technology Chengdu Sichuan 610059 China; 3.Jiangmen Traffic Engineering Quality Administer Station Jiangmen Guangdong 529000 China) Abstract:Principle of Landweber iterative algorithm attenuation tomography is introduced.Accelerated Landweber iteration algorithm is used to calculate ultrasonic attenuation tomography for a cast-in-place pile model with a hole defect.The result clearly shows the position and shape of the hole and agrees well with the velocity image.Furthermore the algorithm is used on the attenuation image reconstruction for a cast-in-place pile of a bridge engineering.The reconstruction image and velocity image both clearly show the place of defect.The results of core-drilling verify the effectiveness of the algorithm. Key words:Landweber;attenuation t...
灌注桩超声波衰减成像技术研究.pdf
