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| 基于TDR技术的水分测量系统量测膨胀土含水量偏差分析 | |
| 引用本文： | 潘宗俊,谢永利,文明勇,陈金霞.基于TDR技术的水分测量系统量测膨胀土含水量偏差分析[J].公路交通科技,2009,26(7). |
| 作者姓名： | 潘宗俊 谢永利 文明勇 陈金霞 |
| 作者单位： | 1. 交通部公路科学研究院,北京,100088;长安大学,特殊地区公路工程教育部重点实验室,陕西,西,安710064 2. 长安大学,特殊地区公路工程教育部重点实验室,陕西,西,安710064 3. 湖北省仙桃市公路管理局,湖北,仙桃,433000 |
| 基金项目： | 交通部西部交通建设科技项目 |
| 摘 要： | 针对某基于TDR技术的水分测量系统量测膨胀土路堑边坡体积含水量偏离真值这一现象,对岩土的电磁特性、TDR技术量测原理和膨胀土的结构特征进行了研究.通过介电常数与多种类型土的含水量间的对应关系,可以得到介电常数与土体含水量之间有直接的密切关系,进而测量介电常数可以表征土体含水量.结果表明:相对于普通粘土而言,膨胀土粘粒含量和密度的增加引起电磁波传播过程中介电常数的变化,从而引起体积含水量增大;某基于TDR技术的水分测量系统在出厂前标定时采用的是石英砂材料,与膨胀土的颗粒粒径相差很大,产生量测偏差. |
| 关 键 词： | 道路工程 膨胀土 含水量 介电常数 电导率 |
Analysis on Water Content Deviation of Expansive Soil Measured by Moisture Measurement System Based on TDR |
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| PAN Zongjun,XIE Yongli,WEN Mingyong,CHEN Jinxia.Analysis on Water Content Deviation of Expansive Soil Measured by Moisture Measurement System Based on TDR[J].Journal of Highway and Transportation Research and Development,2009,26(7). | |
| Authors: | PAN Zongjun XIE Yongli WEN Mingyong CHEN Jinxia |
| Institution: | 1.Research Institute of Highway;Ministry of Communications;Beijing 100088;China;2.Key Laboratory for Special Area Highway Engineering of Ministry of Education;Chang'an University;Xi'an Shaanxi 710064;3.Hubei Xiantao Highway Administration;Xiantao Hubei 433000;China |
| Abstract: | Since the data from a TDR moisture measurement system are deviated from the true values in measuring the slope of expansive soils on road-cutting,the geotechnical electromagnetic property,the principle of TDR moisture measurement system and the texture characteristics of expansive soils were studied.Through the correspondence relationship of dielectric constant with kinds of soil's water content,the direct intimate connection between dielectric constant and water-content of soil was found out,and the dielec... |
| Keywords: | TDR |
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