探地雷达用于既有公路路基状况探测研究
发布时间：2018-10-29 10:28
【摘要】：路基是公路的重要组成部分,其质量的好坏直接决定了公路的使用性能和使用寿命。随着自然环境和行车荷载的影响,在公路运营过程中,路基状况难免会出现各种各样的问题。为了对路基状况进行探测和评价,传统的检测一般采用钻孔和开挖的方式对路基土进行取样,然后对采集的资料进行处理,评价路基的状况。由于这种传统的检测方法效率低,对公路损坏大,而且难以应用与运营公路,随着科技的进步,无损检测开始得到发展,探地雷达技术逐步引入公路路基的探测,该技术可用于探测地下埋设物、地下空洞等等,并且分辨力高、精度高。故本文将研究探地雷达对路基探测方法的应用,主要研究成果如下：(1)基于探地雷达的测试要求以及运营公路的探测要求,开展了探地雷达用于公路路基探测的可行性分析。(2)分析了探地雷达探测参数对探测效果的影响,并基于大量的试验,提出了探地雷达用于公路路基状况探测的参数优化配置方案,有效地提高了探测的效果。(3)提出了探地雷达探测公路路基的基本流程。首先对公路路基进行定期普查,并提出快速探测要求,对探测数据进行数据处理,最终提交路基定期检查报告。实现了探地雷达用于公路路基探测的规范化管理。(4)针对层状介质中探地雷达反演的解译优化方法,基于大量的设想和试验,提出了探地雷达加权后投影成像方法以及对两层介质中目标的快速后向投影成像方法,并通过模拟实验证明了所提出的新的成像技术在很大程度上提高了探地雷达探测公路路基的效率和精度。应用探地雷达参与了高速公路路基病害的探测实例,进一步验证了探地雷达探测公路路基的可行性。
[Abstract]:Roadbed is an important part of highway, its quality directly determines the performance and service life of highway. With the influence of natural environment and traffic load, various problems will inevitably appear in the roadbed condition in the course of highway operation. In order to detect and evaluate the condition of roadbed, the traditional method of testing is to sample subgrade soil by drilling and excavation, and then process the collected data to evaluate the condition of roadbed. With the development of science and technology, nondestructive testing has been developed, and ground penetrating radar (GPR) technology has been gradually introduced into the detection of highway subgrade, because of the low efficiency of the traditional detection method, the great damage to the highway, and the difficulty of applying and operating the highway. This technique can be used to detect underground buried objects, underground cavities and so on, with high resolution and accuracy. Therefore, this paper will study the application of ground penetrating radar to roadbed detection, the main research results are as follows: (1) based on the test requirements of GPR and the detection requirements of operational highway, The feasibility analysis of GPR used in highway roadbed detection is carried out. (2) the influence of GPR detection parameters on the detection effect is analyzed, and based on a large number of experiments, This paper puts forward a parameter optimal configuration scheme of ground penetrating radar used in highway roadbed condition detection, which effectively improves the detection effect. (3) the basic flow chart of GPR detecting highway roadbed is put forward. First, the highway roadbed is surveyed regularly, and the requirement of rapid detection is put forward, and the data of detecting data is processed, and finally the periodic inspection report is submitted to the roadbed. The standardized management of ground penetrating radar used in highway subgrade detection is realized. (4) aiming at the interpretation and optimization method of ground penetrating radar inversion in layered media, based on a large number of assumptions and experiments, A weighted backprojection imaging method for ground penetrating radar (GPR) and a fast backward projection imaging method for targets in two layers of media are proposed. The simulation results show that the proposed new imaging technique can greatly improve the efficiency and accuracy of the ground penetrating radar (GPR) in detecting highway roadbed. The application of ground penetrating radar (GPR) to the detection of highway roadbed diseases is an example, which further verifies the feasibility of GPR in detecting highway roadbed.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1
，
本文编号：2297435
[Abstract]:Roadbed is an important part of highway, its quality directly determines the performance and service life of highway. With the influence of natural environment and traffic load, various problems will inevitably appear in the roadbed condition in the course of highway operation. In order to detect and evaluate the condition of roadbed, the traditional method of testing is to sample subgrade soil by drilling and excavation, and then process the collected data to evaluate the condition of roadbed. With the development of science and technology, nondestructive testing has been developed, and ground penetrating radar (GPR) technology has been gradually introduced into the detection of highway subgrade, because of the low efficiency of the traditional detection method, the great damage to the highway, and the difficulty of applying and operating the highway. This technique can be used to detect underground buried objects, underground cavities and so on, with high resolution and accuracy. Therefore, this paper will study the application of ground penetrating radar to roadbed detection, the main research results are as follows: (1) based on the test requirements of GPR and the detection requirements of operational highway, The feasibility analysis of GPR used in highway roadbed detection is carried out. (2) the influence of GPR detection parameters on the detection effect is analyzed, and based on a large number of experiments, This paper puts forward a parameter optimal configuration scheme of ground penetrating radar used in highway roadbed condition detection, which effectively improves the detection effect. (3) the basic flow chart of GPR detecting highway roadbed is put forward. First, the highway roadbed is surveyed regularly, and the requirement of rapid detection is put forward, and the data of detecting data is processed, and finally the periodic inspection report is submitted to the roadbed. The standardized management of ground penetrating radar used in highway subgrade detection is realized. (4) aiming at the interpretation and optimization method of ground penetrating radar inversion in layered media, based on a large number of assumptions and experiments, A weighted backprojection imaging method for ground penetrating radar (GPR) and a fast backward projection imaging method for targets in two layers of media are proposed. The simulation results show that the proposed new imaging technique can greatly improve the efficiency and accuracy of the ground penetrating radar (GPR) in detecting highway roadbed. The application of ground penetrating radar (GPR) to the detection of highway roadbed diseases is an example, which further verifies the feasibility of GPR in detecting highway roadbed.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1
，
本文编号：2297435
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