| 瞬态瑞利波法定量分析二维空洞的形状参数和位置 |
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| 引用本文： | 郭德平,江刚,李铮,钟炜华,李金鑫,周小平. 瞬态瑞利波法定量分析二维空洞的形状参数和位置[J]. 重庆建筑大学学报, 2018, 40(5): 71-77 |
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| 作者姓名： | 郭德平 江刚 李铮 钟炜华 李金鑫 周小平 |
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| 作者单位： | 叙镇铁路有限责任公司, 云南 昭通 657900,贵州大学 土木工程学院, 贵阳 550003,重庆市城市建设投资(集团)有限公司, 重庆 400015,江西应用技术职业学院, 江西 赣州 341000,重庆大学 土木工程学院, 重庆 400045,重庆大学 土木工程学院, 重庆 400045;重庆大学 山地城镇建设与新技术教育部重点实验室, 重庆 400045 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）（2014CB046903）；国家自然科学基金（51325903、51679017）；重庆市自然科学基金（院士专项）（cstc2015jcyjys30001、cstc2015jcyjys30006、cstc2016jcyjys0005） |
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| 摘 要： | 空洞的存在对地下工程质量有重要影响，有必要采取物探方法探测空洞的形状和位置。采用有限元法分析了瑞利波在含空洞介质中的传播特性，提出了定量分析空洞形状参数和位置的计算方法。根据入射瑞利波和反射瑞利波传播时间差确定空洞的水平位置，基于临界干扰频率法获得空洞的埋深，用能量衰减率法确定空洞的大小。结果表明：瑞利波沿介质表面传播过程中遇到空洞会发生反射和能量衰减，获得的空洞位置和形状参数相比实际值的误差较小，达到较高的精确度。通过案例分析验证了计算方法的准确性。
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| 关 键 词： | 有限元 瑞利波 地下空洞 衰减率 临界干扰频率 |
| 收稿时间： | 2017-06-28 |
Quantitative analysis of shape parameters and position of the two-dimension defects with transient Rayleigh wave method |
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| Guo Deping,Jiang Gang,Li Zheng,Zhong Weihu,Li Jinxin and Zhou Xiaoping. Quantitative analysis of shape parameters and position of the two-dimension defects with transient Rayleigh wave method[J]. Journal of Chongqing Jianzhu University, 2018, 40(5): 71-77 |
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| Authors: | Guo Deping Jiang Gang Li Zheng Zhong Weihu Li Jinxin Zhou Xiaoping |
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| Affiliation: | Xuzhen Railway Co., Ltd. Zhaotong 657900, Yunan, P. R. China,School of Civil Engineering, Guizhou University, Guiyang 550003, P. R. China,Chongqing City Construction Investment(Group) Co., Ltd., Chongqing 400015, P. R. China,Jiangxi Collgeg of Applied Technology, Ganzhou 341000, Jiangxi, P. R. China,School of Civil Engineering, Ministry of Education, Chongqing University, Chongqing 400045, P. R. China and School of Civil Engineering, Ministry of Education, Chongqing University, Chongqing 400045, P. R. China;Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, P. R. China |
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| Abstract: | The existence of defects significantly affects the quality of underground engineering, making it necessary to detect the existence of defects with geophysical methods. The fluctuation characteristics of Rayleigh wave in the medium containing defects were analyzed with the finite element method, and quantitative analytical methods of shape parameters and position of defects were proposed. The horizontal position of defects is defined based on the propagation time difference between the incident Rayleigh wave and the reflected Rayleigh wave, while the depth of defects is obtained with the critical disturbance frequency method.The size of defects is determined with the energy attenuation rate method. The results show that the energy of Rayleigh wave attenuates and reflects during the process of propagation along the surface of the medium. It can be observed that results from the proposed method are in good agreement with the measured data. |
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| Keywords: | finite element method Rayleigh wave defects attenuation rate critical disturbance frequency |
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