| 季冻区粉砂土路基水、温变化监测与分析 |
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| 引用本文： | 程培峰,宇德忠,范勇强.季冻区粉砂土路基水、温变化监测与分析[J].公路,2011(10). |
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| 作者姓名： | 程培峰 宇德忠 范勇强 |
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| 作者单位： | 1. 东北林业大学土木工程学院 哈尔滨市 150040
2. 东北林业大学土木工程学院 哈尔滨市 150040;黑龙江省交通科研所 哈尔滨市 150080 |
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| 基金项目： | 黑龙江省交通厅重点科技项目 |
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| 摘 要： | 粉砂土介于细砂土和粉土之间,颗粒组成中黏性颗粒含量较少,用其填筑的路基含水率变化范围较大且与路基温度变化有一定的关系,在负温条件下由于水分的迁移积聚会加剧路基的冻胀。为了研究季冻区粉砂土路基的水、温变化规律及其对路基冻胀的影响,选择典型粉砂土路基,利用自主研发的监测设施对试验段路基水、温变化进行监测和分析,结果表明:路基在冻结过程中,水分在温度梯度的作用下,越往路基上层迁移积聚现象越显著;在路基不同深度处,由于温差和含水率的不同冻结单位厚度(即0.2m)土层所需的时间也有所差异;填方路基由于边坡的存在,距边坡较近处路基土的温度要略高于路中线处路基土的温度,冻融所需时间也短于后者。研究结果进一步了解了粉砂土路基的水、温变化规律及冻融过程,对今后粉砂土路基的施工和冻害防治具有一定的参考和借鉴作用。
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| 关 键 词： | 路基 粉砂土 含水率 温度 变化规律 冻融过程 |
Monitoring and Analysis of Moisture and Temperature of Silty Soil Subgrade in Seasonally Frozen Region |
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| CHENG Pei-feng,YU De-zhong,FAN Yong-qiang.Monitoring and Analysis of Moisture and Temperature of Silty Soil Subgrade in Seasonally Frozen Region[J].Highway,2011(10). |
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| Authors: | CHENG Pei-feng YU De-zhong FAN Yong-qiang |
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| Institution: | CHENG Pei-feng1,YU De-zhong1,2,FAN Yong-qiang1(1.School of Civil Engineering,Northeast Forestry University,Harbin 150040,China,2.Institute of Communications Science and Research of Heilongjian Province,Harbin 150080,China) |
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| Abstract: | Silty soil is between fine-sand soil and powder soil,the moisture in the subgrade which filled with silty have a large range,and have a relationship with the changing of humidity of the subgrade in a negative temperature conditions will aggravate the subgrade freezing.In order to understand the changing of soil subgrade's temperature and moisture in seasonal frost region,using self-developed monitoring facility consummates the roadbed moisture and temperature data,the results show that: in the freezing proc... |
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| Keywords: | roadbed silty soil moisture remperature changing regularity rost failure |
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