The weak intercalations have an impedance action on seismic wave propagation in spite of its adverse influence on engineering body.
尽管软弱夹层对工程往往产生不良影响，但同时又对地震波具有阻隔作用。
Because the thickness of weak intercalations is just about a few micrometers to centimeters, insitu tests of weak intercalations under saturated conditions are difficult to carry out in the field.
软弱夹层的厚度通常仅数毫米至数厘米，太薄的试样在现场难以进行饱水条件的强度试验。
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