in view of this situation a new method of classification in which the overburden thickness are regarded as a main index is proposed.
本文针对这种情况提出了改进场地分类的原则和方法。
we could determine the overburden thickness by contrast the electric property difference of the underlying original rock and the overburden.
该方法可利用覆盖层与下部基巖存在的电性差异来测定覆盖层的厚度。
at present, overburden thickness of a subaqueous tunnel is in general determined by experience, which leads to diversified results as obtained by different empirical formulae.
水下隧道覆盖层厚度目前基本上是凭经验确定的,采用不同的经验公式得到的计算结果差异很大。
according to the shallow seismic acquisition results, the deep tectonics such as overburden thickness and bedrock top surface depth are studied.