| 青藏公路多年冻土区混凝土空心块护坡路基应用效果分析 |
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| 引用本文： | 刘戈,汪双杰,李金平,陈建兵.青藏公路多年冻土区混凝土空心块护坡路基应用效果分析[J].路基工程,2014,0(6):37-41. |
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| 作者姓名： | 刘戈 汪双杰 李金平 陈建兵 |
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| 作者单位： | 中交第一公路勘察设计研究院有限公司, 西安 710075 |
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| 基金项目： | 国家重点基础研究发展计划:冻土工程灾害评估及其防治理论与对策 |
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| 摘 要： | 在综合遮阳板路基和碎石护坡路基工程应用经验的基础上,提出了一种混凝土空心块护坡路基的新型结构,并在青藏公路风火山多年冻土区修筑了两种空心块排列结构的试验工程,基于现场试验工程观测数据的分析,对两种结构的空心块护坡路基的降温效果进行了对比分析和研究,同时将空心块护坡路基与邻近遮阳板路基的调控效果进行了对比。结果表明:采用空心块护坡路基结构,可有效地减缓冻土上限下降的速率,维护路基下多年冻土的热稳定性,且沿边坡随意堆放空心块的应用效果要优于顺序摆放空心块的结构。
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| 关 键 词： | 青藏公路 多年冻土 空心块护坡 应用效果 |
| 收稿时间： | 2019-11-09 |
Analysis on Application of Subgrade with Concrete Hollow Block Revetment in Permafrost Zone along Qinghai-Tibet Highway |
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| Authors: | LIU Ge WANG Shuangjie LI Jinping CHEN Jianbing |
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| Affiliation: | ( CCCC First Highway Consultants Co. , Ltd. , Xi＇an 710075, China) |
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| Abstract: | Based on practical experience about comprehensive engineering of sun shield subgrade and subgrade with crushed stone revetment, a new structure of concrete hollow block revetment was proposed ; and the test works with two kinds of hollow block structures was built in the permafrost zone of Fengbuo Mountain along Qinghai-Tibet Highway. With the data from on-site observation, the cooling effects of these two structures were studied and, simultaneously, the regulation effects of the subgrade with hollow block revetment and the adjacent sun shield subgrade were compared. The results show that the subgrade with hollow block revetment may slow down the settling speed of the permafrost table and maintain the thermal stability of the permafrost under the subgrade; in addition, the application effect when the hollow blocks are piled up randomly along the slope is better than that when the blocks are placed in order. |
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| Keywords: | Qinghai-Tibet Highway permafrost slope-protection hollow block application effect |
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