探地雷达方法在特殊含油污水管道渗漏探测中的应用

基于含油污水管道内输送液体温度高、无压和检测区域面层为硬化混凝土的特点,对某厂区含油污水铸铁管道地下渗漏问题,利用探地雷达方法进行了探测。分析表明,污染物在地层中的扩散形态、污染物与孔隙水的导电性和综合介电常数是影响探测结果的主要因素,而这些因素又受到土层孔隙度、饱和度和污染物与孔隙水的相互作用影响,从而改变了土壤污染区的物理和化学性质。在综合分析获得的不同类型渗漏污染源引起的异常特征前提下,将探地雷达剖面划分成三大类型,并依据这些典型图谱特征,圈定了渗漏点并得到了验证,研究结果证实了探地雷达方法对此类特殊污染物和污染区探测的可行性。

Application of GPR Method in Special Oily Sewage Pipeline Leakage Detection

The exploration and determination of leakage of underground pipes is always a difficult problem, especially for some special underground pressureless metallic pipes, which are used to transport the high temperature sewage. In this paper, the ground penetrating radar (GPR) method is applied to detect the special oily sewage pipes leakage problems. The analysis result showed that the veracity of the exploration is controlled by the diffused form of the contamination and the general conductivity and permittivity of the contamination and the water of pores, while these factors is influenced by the porosity and the saturation of the soil, and the reciprocity between the contamination and the water of pores. These have brought the variation of physical and chemic properties of the contaminated zone. Finally, we based on the comprehensive analysis of the abnormal characteristics caused by different types of leakage pollution sources, the GPR profiles are divided into three types, and the leakage points are delineated and verified according to these typical spectral characteristics. The results showed the feasibility of using GPR method to detect the special oily sewage pipes problems.