黄土机场近地表填土层含水率快速无损检测研究

Loess soil moisture content fast nondestructive testing of airport surface

黄土高填方机场施工期间容易形成填土缺陷等问题,导致机场运行期存在安全隐患。地质雷达无损检测的方法通过研究场地介电常数和电导率等因素,对填土机场存在的不可见缺陷具有较好的检测效果。本文利用电磁波数值模拟的方法,对考虑到介电常数以及电导率影响下的典型缺陷进行数值模拟,同时通过二维数据的介电常数递推计算含水率,对可能存在的缺陷体进行及时监测,从而达到快速无损的检测目的。

It is likely to form filling defects during the period of construction in loess-filled foundation of Airport,whereby leading to the great hidden troubles in airport operating period.Through studying such factors as the site dielectric constant and permittivity,etc.The geologic radar non-destructive testing method may have the better detecting effects upon the existing invisible defects in the loess-soil-filled airport.This paper uses the electromagnetic numerical simulation method to carry out the numerical simulation of the typical defects affected by dielectric constant and permittivity,and at the same time,the recursive calcucation of moisture content can be conducted through two-dimensional dielectric constant,and likely existing defects masses are monitored in time,whereby achieving the purpose of the rapid non-destructive testing.