寒区隧道洞口衬砌开裂和道床冰害原因分析及整治

发布时间：2018-06-15 21:03

本文选题：铁路隧道 + 冻胀力　；参考：《隧道建设》2017年07期

【摘要】：为解决寒冷地区隧道内部产生的冰害问题,以东北地区某铁路隧道为例,采用综合分析的方法,对案例隧道洞口衬砌开裂、渗水以及道床冰害产生的原因进行研究,并提出相应的整治措施。研究结果表明:1)隧道洞口围岩衬砌开裂主要由围岩冻胀力引起,采用喷涂保温层+防火砂浆的保温措施以及锚杆补强和裂缝嵌补的结构措施可以有效避免衬砌的开裂;2)引起道床冰害的洞内水主要来源于洞口路堑的积雪融化水和仰拱局部渗水,采用双侧水沟布设电加热设施、洞口道床底部设置小型挡水坝并加设横向电加热设施和进口路堑位置及路堤零填段设置挡雪设施的措施可以有效解决道床冰害问题。
[Abstract]:In order to solve the problem of ice damage in tunnel in cold area, taking a railway tunnel in Northeast China as an example, the causes of lining cracking, seepage and ice damage of tunnel bed are studied by comprehensive analysis method. And put forward the corresponding treatment measures. The results show that the cracking of surrounding rock lining at the tunnel entrance is mainly caused by the frost heaving force of surrounding rock. The heat preservation measures of sprayed insulating layer fire proof mortar and the structural measures of bolting reinforcement and crack inlay can effectively avoid the cracking of lining) the water in the tunnel caused by ice damage mainly comes from the snow melt water in the cut of the tunnel. And partial seepage of the inverted arch, The measures of installing electric heating facilities on both sides of the ditch, setting a small dam at the bottom of the tunnel bed and adding the transverse electric heating facilities, the position of the inlet cutting and the snow blocking facilities in the zero filling section of the embankment can effectively solve the ice damage problem of the pavement bed.
【作者单位】：中铁西南科学研究院有限公司;中铁八局集团有限公司;
【基金】：中国中铁股份有限公司科技开发计划项目课题(2012-重大-08;2014-重点-26)
【分类号】：U457.2

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