篇篇学之4：The Arch Dams

战火财神

There are three mainly types of dams: gravity dams,embankment dams and arch dams.(Considering these dams are ordinarily,we just take these for example.),Here we just describe the arch dam.
NO3.Arch dams
The arch dam is a curved dam which is dependent upon arch action for its strength.The arch dam is thinner and therefore require less material than any other type of dams.The arch dam is good for sites that are narrow and have strong abutments.The main force of a arch dams are as follows:force of the reservoir water,weight of concrete and forces together.There are other forces that may act on an arch dam:internal water pressure,temperature variations in the concrete earthquake loads.and settlement of the foundation or abutments.
Words:
gravity dam   重力坝   embankment dam   堤坝（土石坝）   arch dam   拱坝   curve   曲面的
abutment    连接（拱肩） variate  变化   settlement    沉降
                                               

angel_yll

篇篇学第四篇已经新鲜出炉，望各位同仁多多支持。                 

nwax032

多谢scuyangying版主，第四篇终于出来了，我都等了两天了，呵呵                 

zmhj307

吓吓，有的单词分家了
大概意思能看懂，又学到了几个专业词汇^_^                 

speculator_z

Glad to see the forth article. Thank you!                 

washingfon

坚持到底就是胜利。                 

dpwurdpwur

版主能否给出译文啊?有的地方不太明白。呵呵，见笑了……