此范文为中译英

原文：

坝基防渗帷幕采用两排，由于勘探深度未达到中国规范所要求的相对不透水层3Lu，以及地基条件的不确
定性，因此主帷幕灌浆深度暂按拟定建基面高程以下一倍坝高考虑，副帷幕灌浆深度按主帷幕灌浆深度的一半考虑，两岸帷幕均延伸至地下水位与正常蓄水位相交处，帷幕倾向上游7°，孔间距3m。
为降低坝基扬压力、排除渗水，在坝踵处灌浆排水廊道里，上游帷幕后布置一道排水幕，为使排水幕不致削弱防渗帷幕厚度，排水孔倾向下游15°,排水孔孔深为主帷幕的0.5倍，孔距3m，孔径110mm～130mm。在小断层和挤压带出露部位，排水孔均设反滤保护措施。

译文：

There are two rows of imperious curtains for dam foundation. Since the detection depth has
not reach the relative watertight layer 3Lu required by Chinese standards, and due to the
uncertain condition of groundwork, the grouting depth of main curtain is considered to be
double of dam height lower than the altitude of planned basal construction plain, and the
grouting depth of auxiliary curtain is considered to be one half of the grouting depth of
main curtain. The curtains on both banks will extend to the intersection of underground
water and normal pool level. The curtains inline upstream by 7°, and the hole gap is 3m.
In order to reduce pressure of dam foundation and eliminate water, a drainage curtain will
be arranged inside the grouting and drainage passage at dam heel, and behind upstream
curtain. In order to prevent the thickness of imperious curtain from weakened by drainage
curtain, the drainage hole shall incline downstream by 15°, the depth of drainage hole
shall be one half of main curtain, the hole gap shall be 3m, and the hole diameter shall be 110mm～130mm. There will be inverted filter protection for all the drainage holes at the
exposure position of small fault and crush zone.