补充说一句,宜万铁路按准高速200kmph设计,造价已经超过一亿pkm了

最新提问 3月 16 分类:吐槽 | 用户: Steve Cheung

本文主旨: 高铁, 铁路, 青藏线, 中国铁路, 青藏高原

补充说一句,宜万铁路按准高速200kmph设计,造价已经超过一亿pkm了,这是某院选线侧重于地方经济建设,罔顾大西南全局发展的后果。

 另外,大铁路高铁(含动车牵引的客专、城际列车)、城市地下轨道列车的牵引变电所,其两路进线,普遍采用一路国家电网专线一路地方电网专线,或者一路国网专线分为两路国网专线(进线的100%备用,较少见),或者两路地方电网进线(分别从两个地方电网取电,极少见)。

 当然,一台标准AT主变的容量(视在功率)约为25MVA,这会给地方电网造成巨大负担,要知道一个人口20万的城市用电量约为100MVA。

(AT主变容量可能不太准确,我只是将普铁12MVA简单扩大了一倍,还是在供电区域不变的条件下),一个AT供电臂提高到45~60km左右,AT一般不将一侧供电臂的上下行并联,而是将供电臂末端并联。

普铁的供电臂只有30km。
发表于 3月 16 用户: Steve Cheung
高铁(客运专线)就这样开通了,以目前青藏铁路格尔木至拉萨段的年均几十万客运运力,高铁的产出与投入严重违背自然规律,赔钱赔到举全国铁路之力来供养这一条高铁。

这样的生意不划算,铁道部也不会鱼唇到这一步。

反而像西宁至格尔木段这样的电气化区段,160时速,既能营客运又能营货运,在国防毫不动摇的前提下,还有可观的经济效益,铁道部是乐意的。

 我也衷心的希望青藏铁路格拉段早日实现电气化改造,以及未来的拉日线,日喀则市至噶尔县的规划铁路以及噶尔至和田的铁路,向东则是在建的川藏铁路。

川藏按照160时速设计,困难区段按100时速设计,从雅安到拉萨,都是电气化单线铁路,雅安到浦江接成都既有复线。

青藏铁路电气化改造和川藏铁路按电气化设计,也说明技术上高铁方案可行。

归结到一点,就是投入产出比的问题。
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最新回答 3月 16 用户: Steve Cheung
很多高铁造价高,是由于地质原因需要强固设计或者提高桥隧比例,如宜万铁路按200kmph时速设计很多区段仅能160kmph通过,宜万铁路的侧向空洞特别多,需要从下面做模具再浇筑混凝土强固设计。

或者按350kmph时速设计的,需要更昂贵的设备,如武广客专,郑西客专,京津城际,京沪高铁

或者由于技术原因或人为失误造成浪费。

如秦沈线按AT供电设计,当时被鬼子坑了一波,2km给咱们设一个AT厢变,后来咱们人为调整为20km一个AT厢变,鬼子造成咱们成本巨额浪费。

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