高密度电法探测既有公路路基湿度场的应用技术研究

发布时间：2018-04-20 01:28

本文选题：高密度电阻率法 + 湿度场　；参考：《长沙理工大学》2014年硕士论文

【摘要】：随着公路建设网络的全面展开,公路的检测养护工作变得日益繁重。路基作为道路的主体结构在很大程度上影响着整个道路的使用性能,路基破坏可直接导致交通瘫痪,造成经济损失。在影响路基稳定的诸多因素中,路基土的含水率分布是其中最重要因素之一。因此,本文开展了高密度电阻率法对既有公路路基湿度场的探测研究,能够为路基的养护与维修提供一定参考。主要研究成果如下：(1)以高密度电阻率法的基本原理为基础,综合考虑路基土含水率对路基病害、路基强度和路基土电阻率的影响,对路基土回弹模量与稠度进行了回归分析,得到了回归分析关系式。同时对高密度电阻率法在既有公路路基湿度场检测中的可行性进行了研究,提出了高密度电阻率法在既有公路检测中存在的几个问题。(2)针对高密度电阻率法在既有公路路基检测中表现出的低效性和局限性,对该方法进行了适用性研究。主要从提高适用性及检测效率两个方面出发,对高密度电阻率法在路基检测中所需的相关参数进行了比选研究,并对电极等相关检测设备进行改造,提高了高密度电阻率法在既有公路路基检测中的适用性。此外,利用改造后的检测设备进行试验,验证了其稳定性、可行性及适用性。(3)从室内数据标定及现场数据修正两方面出发,对高密度电阻率法在路基湿度场检测中的数据处理方法进行了研究。通过室内数据标定,得到了路基填土物性参数室内标定曲线,即含水率与电阻率关系曲线。基于室内标定结果,对现场检测数据进行修正,在检测路段的土路肩处进行小电极间距测量,求取反算含水率与实测含水率的误差关系,进而对所测路基段路基土的含水率数据进行修正。
[Abstract]:With the development of highway construction network, the inspection and maintenance of highway becomes more and more heavy. The subgrade, as the main structure of the road, affects the performance of the whole road to a great extent, and the damage of the roadbed can directly lead to traffic paralysis and economic loss. The distribution of soil moisture content is one of the most important factors affecting the stability of roadbed. Therefore, the high density resistivity method is carried out to detect the moisture field of the existing highway roadbed, which can provide a certain reference for the maintenance and maintenance of the roadbed. The main research results are as follows: (1) based on the basic principle of high density resistivity method and considering the influence of soil moisture content on subgrade disease, subgrade strength and subgrade soil resistivity, regression analysis is carried out on the elastic modulus and consistency of subgrade soil. The regression equation is obtained. At the same time, the feasibility of high density resistivity method in detecting the moisture field of existing highway subgrade is studied. Several problems of high density resistivity method in existing highway detection are put forward. Aiming at the low efficiency and limitation of high density resistivity method in existing highway subgrade detection, the applicability of this method is studied. From two aspects of improving applicability and testing efficiency, the relative parameters needed by high density resistivity method in subgrade detection are compared and selected, and the related detection equipment such as electrodes are reformed. The applicability of high density resistivity method in existing highway subgrade detection is improved. In addition, the stability, feasibility and applicability of the modified testing equipment are verified from two aspects: indoor data calibration and field data correction. The data processing method of high density resistivity method in subgrade moisture field is studied. Through the indoor data calibration, the indoor calibration curve of the physical parameters of subgrade fill is obtained, that is, the relation curve between moisture content and resistivity. Based on the results of indoor calibration, the field test data are corrected, and the small electrode spacing is measured at the shoulder of the soil road in the detection section. The error relationship between the reverse calculation moisture content and the measured moisture content is obtained. Furthermore, the moisture content data of subgrade soil in the subgrade section are corrected.
【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

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