基于直流电法的市政管网漏水点探测研究

Research on leakage point detection of municipal pipe network based on DC method

城市地下空间的精确探测是城市各项工作成功实施的重要保障,市政管网漏水点探测是其中非常重要的一项研究课题。基于直流电法成熟、抗干扰能力强的特点,首先采用有限单元法将漏水点设为源点,通过计算表面电位确定了漏水点电位分布特征,随后通过对金属管线干扰情况下漏水点探测进行数值计算,确定了直流电法能够有效地对地下管道漏水点位置进行定位并且具有较强的抗干扰能力。最后通过物理实验进一步验证了数值模拟的结果,研究结果表明:直流电法可以有效地探测市政管网漏水点位置,方法抗干扰能力强、切实可行。

The accurate detection of urban underground space is an important guarantee for the successful implementation of urban work. The detection of water leakage point of municipal pipe network is a very important research topic. Based on the characteristics of mature DC method and strong anti-interference ability, firstly, the water leakage point is set as the electric fieldsource pointof electric field by using the finite element method, and the potential distribution characteristics of water leakage point are determined by calculating the surface potential. Then, the numerical calculation of water leakage point detection under the interference of metal pipeline is carried out, It is determined that the DC method can effectively locate the leakage point of underground pipeline and has strong anti-interference ability.Finally, the numerical simulation results are further verified by physical experiments. The research results show that the DC method can effectively detect the location of water leakage point of municipal pipe network, and the method has strong anti-interference ability and is practical.