基岩顶面 meaning in English

basal surface

The nancha suspending - gay bridge of the changjiang road - bridge in jiangshu runyang , with a main span of 1490m , ranks first in china , third in the world . . the north rivets , only 250m from the main stream of changjiang , have a tight liaison with the waterpower of it . especially , in this area , the face of rocks undulates a lot and exist fault - fabric . the soil there has apparent difference with the trend of water . the base - hole of north rivets can be named a super - deep one , with a 60m length , 50m widths , and 48m depths . the fence of the base takes advantages of the rectangular underground continuous wall structure and succeeds
江苏润扬长江公路大桥南汊悬索桥，主跨1490m ，居中国第一，世界第三。该桥的北锚碇距长江干流仅250m ，与长江水力联系密切，锚碇区水文、地质情况复杂，表层淤泥质土及松软粘土层较厚，基岩顶面起伏较大，且存在断裂构造，土层具明显的流变特性。北锚碇基坑为长60m 、宽50m 、深48m的矩形超深基坑，其基础围护在国内首次采用矩形地下连续墙结构，并获得成功。