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“农村野战fVeegxVⅰde0”-译文小记

看“大国重器”农村野战fVeegxVⅰde0如何加持南水北调 记者探访“穿黄工程”

来源: 重庆体彩
2024-12-12 07:44:32

最佳回答

“农村野战fVeegxVⅰde0”看“大国重器”农村野战fVeegxVⅰde0如何加持南水北调 记者探访“穿黄工程”

  看“农村野战fVeegxVⅰde0大国重器”如何加持南水北调 记农村野战fVeegxVⅰde0者探访“穿黄工程”

  我们看到在多个“大国重器”的帮助下,南水一路奔腾北上,而在这一路众多的“大国重器”中,“穿黄工程”是南水北调中线一期工程中,投资最大、难度最高的工程,那么,“穿黄工程”到底难在哪儿?南水又是如何穿越黄河的?我们一起去探访这项大国重器。

  “穿黄工程”是典型的地下穿隧洞方案,为什么“穿黄工程”不选择河上架渡槽方案呢?当年黄河中下游分界处的桃花峪水库还未开发,在黄河上面架设渡槽,会影响到桃花峪水库将来确定水位高低的问题。而且,在黄河上需要每隔50米就架设一个1600吨至2200吨的渡槽,研发和设备制造的周期,会影响到整个南水北调工程进度。虽然两相对比,隧洞方案更具性价比,但是也并非一路通顺。黄河是游荡性河流,冲淤变化较大。

  中国南水北调集团中线有限公司河南分公司原副总经理 原穿黄建管部总工程师 王江涛:通过加大隧洞的埋深,设计情况下河床最大冲刷深度为20m,穿黄隧洞最小埋深为河床下23m。

  相比单条隧洞,“穿黄工程”的双条隧洞检修方便,输水效率高。每条隧洞并不是单层的管道,而是像夹心饼干一样,内外两层饼干分别是内外钢筋混凝土管片,中间夹心则是土工布。外层管片可以抵御黄河河底的砂土,内层管片可以承受南水的压力,而中间的土工布则可以吸收并排出内外层管片渗透出的水分。

  原国务院南水北调办总工程师 南水北调工程专家委员会副主任 中国南水北调集团科技委顾问 汪易森:这个结构具有一定刚度的柔性,地震波袭来的时候本身也可以适应(地震带来)的变形。

农村野战fVeegxVⅰde0

  就这样,“穿黄工程”就像“咽喉”一样,每天都在吞吐着南水,最高流量可达到每秒320立方米。倒虹吸,正是“穿黄工程”吞吐南水的科技密码。黄河上游南岸的水位线高于下游北岸。

  中国南水北调集团中线有限公司总调度中心副主任 李景刚:从上游通过这(水)的压强比下游的压强大,通过这个压强这个差,最终实现这个进口的水流过来以后,从出口就自动就流出去了。

  (总台央视记者 梁丽娟 张琪 陈博 薛建启 )

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