你认为地铁是怎样建成的,地铁是怎么建成的？ _生活百科

地铁是怎么建成的？

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地铁这样建，得根据施工的具体条件。
我国最早的北京地铁一、二线，是全部车站和线路，都是明挖的，然后回填。
没有条件明挖，当然就要打洞，车站也是这样。
在城市地下的沙砾层和土层中打洞，甚至还要从河流的下面穿过，比一般的铁路隧道难度更大，采用的新技术更多。
现在采用盾构法修建地铁，对地面的影响可以大大的降低。
水下那些地铁隧道怎么建成的？？【你认为地铁是怎样建成的,地铁是怎么建成的？】

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跟一般的大山隧道原理差不多,只不过在防护上十分严格,而且在护壁上的材料比大山隧道要好多了.
《地铁是怎样建成的》读后感

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《地铁是怎样建成的》读后感
未来工程师的启蒙绘本，广州地铁设计研究院专家们全程参与编纂。带着孩子一起探索地铁是怎样建成的吧……
地铁是怎样建成的的读后感，来自新华文轩网上书店的网友：地下溶洞就像怪兽大嘴！这时地铁又该怎么建造呢？每个“秘密”都在绘本中用绘图与文字揭露给读者。绘本细心地给每幅图配上活泼联想的大字，让孩子可以轻松阅读。看完这本书，无论你是小朋友还是大儿童，是普通读者还是专业人士，都能大大满足对工程科学的探索欲望……
地铁是怎样建成的作文250字

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Recently,we have had a discussion about the advantages and disadvantages of the construction of anunderground.
On the one hand, it is very good to build an underground. Firstly, this is an important way to help the development of the area bothin tranportation and in economy .Secondly, it is of great help to reduce traffic jams in the area. Also,it is more convenient for local people to to other places.
On the other hand, there are also much trouble to build the underground. Above all, much farmland is occupied (used ) for it. Next , a great deal of money is need to build it. What's worse, more pollution is also brought about with the building of the underground.
In my opinion, there are more advantages to build an underground in the long run,so I agree to build one for futher development of our area.
祝你开心如意！O(∩_∩)O~~