There are some earth caves and karst in the airfield runway subgrade of some newly constructed airport, and the bearing capacity of the overburden soil in the subgrade is low.

某新建机场滑行道路基中存在土洞和溶洞，且路基上部土层承载力低。

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Soil survey should be adopted in such soil overburden areas.

在此类土壤覆盖区应采用土壤测量。

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During overburden stripping construction, we have successfully practiced excavation, graded stockpiling and comprehensive utilizing technology for soil layer, mud or muddy clay.

在该矿山覆盖层剥离施工中我们成功实践了土层或淤泥或淤泥质粘土挖运、分级堆放、综合利用技术。

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