top stratum 中文意思是什麼
top stratum
解釋
地表巖層-
Study on bed - separated fissures of overlying stratum and interstice permeability in fully - mechanized top coal caving
綜放開采覆巖離層裂隙變化及空隙滲流特性研究 -
According to their space position, the seismic features of shallow gas in this region can be divided into three groups : ( 1 ) features in the stratum : acoustic blanket, acoustic curtains, acoustic turbidity, irregular strong top reflection boundary, and phase pull - down in both flanks ; ( 2 ) features of the seabed : seabed pockmark and giant sunken pit ; ( 3 ) features in the seawater column : acoustic plumes, cloudy turbidity and point - line - type reflection
該區的淺層氣地震特徵按空間位置分為3大類： （ 1 ）地層中的特徵：聲學空白、聲學幕、聲學擾動、不規則強反射頂界面、兩側相位下拉； （ 2 ）海底面的特徵：海底麻坑、大型塌陷坑； （ 3 ）海水層中的特徵：聲學羽流、雲狀擾動、點劃線反射。 -
( 2 ) on the basis of geddes method, the distribution characteristic of friction surrounding pile of composite foundation is showed as small in top and bottom and big in middle according to measured results, the calculation formula of the top surface of stratum additional stress has been deduced by using mindlin and boussinesq solution, settlement calculation method is brought forth simultaneously
（ 2 ）在geddes法的基礎上，根據實測復合地基樁側摩阻力呈上下小中間大的分佈特點，利用mindlin解和boussinesq解導出了作用於下臥土層頂面附加應力計算公式，並同時提出了長短樁復合地基沉降計算方法。
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