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中国靠“最笨”方法 打通世界最高海拔高速公路隧道
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Topic: 中国靠“最笨”方法 打通世界最高海拔高速公路隧道 (Read 152 times)
yibl
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中国靠“最笨”方法 打通世界最高海拔高速公路隧道
October 23, 2017, 02:34:26 AM
#1
今年国庆前夕,青海花久高速公路雪山一号隧道贯通。雪山一号隧道位于青海省果洛藏族自治州玛沁县,双洞总长9065米,施工最高海拔达4800多米,不仅是花久高速公路工程中海拔最高、难度最大的重点工程之一,也是目前世界上海拔最高、环境最恶劣的高速公路隧道。该隧道究竟是如何建成的呢?
在雪山勘察俩月完成选线
雪山1号隧道与阿尼玛卿雪山隔川相望,修建这条隧道最大的难点就是隧道进口处要穿越大面积冰川堆积物多年冻土层。
专家指出,多年冻土层会造成路基的沉陷,或是隆起,边坡的垮塌失稳,修建隧道时,它也更容易出现坍塌。国内外经验显示,在施工前的勘察过程中,如果勘察到冻土层都是尽量躲避绕行。
2011年8月,中国交建第一公路勘察设计研究院有限公司、隧道与地下工程设计研究院院长曹校勇和他的团队来到地处海拔4555米的阿尼玛卿雪山进行勘探和选线工作。
在高寒缺氧的雪山下,设计人员每天户外工作十个小时以上,喝不到一口热水、吃不上一口热饭。一连勘察了两个多月,终于完成了选线工作,也就是现在的雪山1号的隧道路线。
小小火炉破解世界性难题
2013年7月,中铁十八局三公司和中铁五局的团队在阿尼玛卿雪山脚下,开始施工建设。如何保持冻土的稳定性,避免随着气温的变化而融化或冻胀,并且还不能破坏高原脆弱的生态环境,这是冻土隧道建设过程中面临的一个巨大的世界性难题。
李士栋,中国铁建十八局花久公路雪山1号隧道项目经理,他和他的团队曾经有着7年的高寒地区隧道的建设经验,但从未在冰川堆砌物的多年冻土层修建过隧道。
根据不停的实验和监测,冻土在5度的时候能保持7个小时不融化。在高寒地区,为了创造一个恒温的施工环境,不让土层和围岩受外界环境温度变化的干扰,通常会在洞口搭建一个保温棚。如何让保温棚始终保持在恒温的5度呢?
只有火炉这个最笨的方法,才是最有效的办法。但火炉的数量和火炉之间的间距需要不停的调整和测试。当时我们炉子少了不对,炉子多了不对;说距离远了不对,距离近了还不对。我们就一米一米的试,一个炉子一个炉子增加。
uylvlprx
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Re: 中国靠“最笨”方法 打通世界最高海拔高速公路隧道
October 23, 2017, 12:35:30 PM
#2
中国人是这个世界上最吃苦耐劳的,没有之一。
ma_da_o
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Re: 中国靠“最笨”方法 打通世界最高海拔高速公路隧道
October 23, 2017, 12:41:32 PM
#3
不的不说,中国基建方面还是做的非常号的
WL082746
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Activity: 308
Merit: 109
Re: 中国靠“最笨”方法 打通世界最高海拔高速公路隧道
October 23, 2017, 12:54:17 PM
#4
我们在恢复最原始的动力。
xiaohua2625
Jr. Member
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Activity: 59
Merit: 10
Re: 中国靠“最笨”方法 打通世界最高海拔高速公路隧道
October 23, 2017, 01:32:00 PM
#5
中国基础建设应该是世界上最强的,希望能够早日实现现代化
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