黄土高填方机场填土缺陷区域FDTD正演分析

FDTD Forward Analysis in Defect Areas of Loess High-filling Airport

湿陷性黄土工程存在黄土压实不足以及降雨渗水等缺陷,这些缺陷将给机场运行期带来巨大的安全隐患。利用电磁波数值模拟的方法,研究场地介电常数和电导率等因素,对场地存在的典型缺陷如填充不实、饱和水区域等进行模拟分析。利用地质雷达对已填方场地进行无损检测,即可对场地的典型地质缺陷进行检测,并对填方体的完整性进行评估。

There commonly exist the loess compaction deficiency and seepage defects from rain in collapsible loess engi-neerings ,which will bring great hidden troubles in the operating period of airport .By using the method of electromagnetic numerical simulation ,the factors such as dielectric constant and conductivity are studied ,and the typical defects existed in the field such as false filling and saturated water area filling are simulated and analyzed .Then the nondestructive test-ing is carried out by using GPR in filled site so as to remedy the hidden troubles in time and evaluate the integrity of the filled site .