Short of replacing the entire watermain, which is both expensive and disruptive, the only way to cut background leakage below these levels has been to reduce the waterpressure.
由于费用昂贵而且破坏性大，没有人对水管进行彻底更换。减少底面渗漏流量的唯一办法就是降低水压。
2
The main loads such as the waterpressure, the sand pressure, the uplift pressure and so on are carried on by both the gravity wall and the rockfill body.
库水压力、淤沙压力和扬压力等主要荷载由重力墙与堆石体共同承担，重力墙与堆石体互相支撑，维持稳定。
3
The main loads leading to collapse of dangerous rock are gravity, waterpressure and earthquake force.