一、适应水的压力变化由于液体压强随深度的增加而增大,根据F=PS=pghS 知,河水对坝堤的横向压力也与河水的深度成正比,就是说,坝堤下部受到河水的压力要比上部受到的压力大的多,这样坝堤底部很容易被巨大的河水压力冲破,为防止造成破堤,往往要将坝堤的下部加厚.因此把坝堤 First, adapt to the pressure change of water As the liquid pressure increases with depth, according to F=PS=pghS, the lateral pressure of the river on the dam is also proportional to the depth of the river, that is to say, the lower part of the dam is affected by river water. The pressure is much greater than the pressure on the upper part, so that the bottom of the dam is easily broken by the huge river water pressure. To prevent it from breaking, the lower part of the dam is often thickened.