| 寒区公路路基温度场的自动监测与特性 |
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| 引用本文： | 韩春鹏,何东坡,程培峰,任贵波,王海鹏.寒区公路路基温度场的自动监测与特性[J].长安大学学报(自然科学版),2011(3). |
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| 作者姓名： | 韩春鹏 何东坡 程培峰 任贵波 王海鹏 |
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| 作者单位： | 东北林业大学土木工程学院; |
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| 基金项目： | 黑龙江省交通重点科技项目(HJ20080011) |
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| 摘 要： | 针对寒区公路路基温度场的观测存在外部环境复杂、自动与连续观测难以实现等困难,采用DS18B20温度传感器、STC89C58单片机、DS12C887时钟和AT24C256外部扩展数据存储器组成观测系统,外接锂电池供电,对路基温度场实现了自动采集、储存和无间断观测。结果表明:在冻融循环期内,最大冻深在路基顶面下2.3 m,比天然地基深0.85 m,说明路基填筑改变了原天然地基温度场的状态;与气温变化时间相比,路基冻深变化在次年3月份达到最大,存在50 d左右的滞后期;在路基冻融过程中呈现不均匀现象,融化期内,路基内部存在马鞍形未化冻土区域,并在融化末期产生未化冻土核;其观测结果可作为寒区公路路基病害的分析依据。
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| 关 键 词： | 道路工程 寒区公路 路基温度场 温度观测系统 冻深 |
Automatic measure and character of highway subgrade temperature field in cold region |
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| HAN Chun-peng,HE Dong-po,CHENG Pei-feng,REN Gui-bo,WANG Hai-peng.Automatic measure and character of highway subgrade temperature field in cold region[J].JOurnal of Chang’an University:Natural Science Edition,2011(3). |
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| Authors: | HAN Chun-peng HE Dong-po CHENG Pei-feng REN Gui-bo WANG Hai-peng |
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| Institution: | HAN Chun-peng,HE Dong-po,CHENG Pei-feng,REN Gui-bo,WANG Hai-peng(School of Civil Engineering,Northeast Forestry University,Harbin 150040,Heilongjiang,China) |
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| Abstract: | Aimed at the trouble of complex external environment,inaccessibly automatical and continuous measurement,DS18B20 temperature sensor,STC89C58 singlechip,DS12C887 clock and AT24C256 external memorizer are assembled as an observation system of temperature,which is powered by lithium batteries.Automatical collection,saving and continuous observation are achieved by this system.In the period of freezing-thawing cycling,the biggest frozen depth is 2.3 m under the top of subgrade,0.85 m deeper than natural foundat... |
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| Keywords: | road engineering highway in cold region subgrade temperature field temperature measuring system frost depth |
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