【摘要】 为解决现有电学方法监测垃圾填埋场防渗层渗漏存在的"先污染,后发现"的问题,提出了基于应力波监测技术的垃圾填埋场防渗层渗漏监测定位方法。利用应力波传感器识别和采集应力波信号,建立了应力波波速与时间的空间立体模型,实现防渗层渗漏定位,并对定位结果进行校正。结果表明:检波器距渗漏点的直线距离应≤31. 5 m;定位模型停止迭代的条件是校核向量各元素绝对值<140;定位模型的平均定位误差为0. 248 m,各方向最大引用误差约为0. 32%、0. 58%;通过迭代运算可以缩小被测区域的速度校核比范围,将其作为下一次定位运算的速度校核比初始值,可以减小迭代运算的次数。更多还原

【Abstract】 In order to solve the problem of"discovery after pollution"caused by existing electrical methods used for monitoring the landfill’s impermeable layer,this paper proposed a monitoring location method for impermeable layer leakage in refuse landfills based on stress wave monitoring technology. The stress wave signals were identified and collected by use of a stress wave sensor,and a spatial three-dimensional model of stress wave velocity and time was established to achieve the leakage location of the impermeable layer and correct the positioning results. The results showed that: the linear distance between the wave detector and the leakage point should be less than or equal to 31. 5 m; the condition of iteration stop of the positioning model was that the absolute value of each element of the checking vector was less than 140; the average positioning error of the positioning model was 0. 248 m,and the maximum citation error in each direction was about 0. 32% and 0. 58%; by iterative calculation,the speed check ratio range of the measured area could be reduced,and it would be taken as the speed check ratio initial value of the next positioning operation,to reduce the number of iterative operations.更多还原