bed covering
bed covering-
Upper Jurassic red bed , covering directly on coal-measure strata of Permian and Carboniferous System in Tengxiom-Yanzhou coal bearing Basin , was regarded as a aquifuge in exploration stage .
在滕县、兖州含煤盆地内，上侏罗统红层直接覆盖于二叠、石炭系煤系地层之上，在勘探时期曾被归为隔水层。
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Difficulty and Countermeasure Through River Bed Under Shallow Covering By Slurry Balance Shield
泥水盾构穿越珠江水下浅覆土区域的施工难点与对策
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On regional science and technology TUNNELING METHODS THROUGH RIVER ( LAKE , SEA ) BED UNDER SHALLOW COVERING BY SHIELD
区域科技浅论盾构隧道穿越水底浅覆土施工技术对策
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It is possible for using stiff piled composite foundation for tall-buildings in Karst rock bed under thick covering soil .
提出了在一定埋深下岩溶地区高层建筑应用刚性桩复合地基是可行的。