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《中国工程科学》 >> 2017年 第19卷 第6期 doi: 10.15302/J-SSCAE-2017.06.020

高原冻土区公路路基病害及工程对策

中交第一公路勘察设计研究院有限公司 国家高寒高海拔地区道路工程安全与健康国家重点实验室,西安 710075

资助项目 :中国工程院咨询项目“进藏高速公路与铁路沿线工程地质灾害环境及减灾研究”(2017-XZ-12);国家科技支撑计划项目(2014BAG05B01、2014BAG05B03) 收稿日期: 2017-11-16 修回日期: 2017-12-18 发布日期: 2018-01-31 09:57:42.000

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摘要

本文分析了青藏公路60多年来的历次改建及病害资料,以道路病害率为依据将青藏公路分为稳定区、基本稳定区、不稳定区和极不稳定区;选取了134 km典型病害路段,分析年平均地温、冻土上限退化速率、含冰量与道路病害关系,确定各因素影响下道路的平均使用年限;研究热棒、片块石、保温板、通风管路基处治效果,以及各处治措施实施后引发的新工程病害,分析新生病害的时间效应,并介绍了弥散式通风路基、单向导热板路基和路基路面一体化散热结构等适用于大尺度冻土路基的新型稳定技术。研究结果表明:年平均地温、冻土上限退化速率、含冰量等因素与道路使用寿命均为负相关关系,在各类处治措施中,热棒、片块石、保温板、通风管加片块石对病害预防的有效率较高。

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