改进一步法模型及TDR自适应方法研究

赵云; 凌道盛; 王云龙; 黄博

doi:10.11779/CJGE201605007

改进一步法模型及TDR自适应方法研究 English Version

赵云^{1, 2},
凌道盛^1,2,,
王云龙^{1, 2},
黄博^{1, 2}

1. 软弱土与环境土工教育部重点实验室（浙江大学）,浙江杭州 310058;
2. 浙江大学岩土工程研究所,浙江杭州 310058

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2014CB047005）

详细信息

作者简介:
赵云(1989- ),男,博士研究生,主要从事土动力学等方面的研究。E-mail: zhaoyun1106@163.com。

通讯作者:
凌道盛

中图分类号: TU43
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出版历程
- 收稿日期: 2015-04-13
- 发布日期: 2016-05-24

Modified one-step method and its adaptive system of TDR

ZHAO Yun^{1, 2},
LING Dao-sheng^1,2,,
WANG Yun-long^{1, 2},
HUANG Bo^{1, 2}

1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China;
2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 建立土体含水率和干密度与电磁参数间的经验模型是TDR技术在岩土工程中应用的关键。在原一步法模型基础上,分别建立了土体含水率、干密度与土体介电常数等电磁参数间新的经验关系模型,实现了干密度和含水率的解耦计算。分析了击实功、孔隙水电导率、温度等因素对新经验公式的影响。通过标定后,新经验公式计算的干密度相对偏差在±5%以内,含水率偏差在±0.02 g.g^-1以内。同时,提出了一种TDR自适应方法,可在现场无标定条件下实现土体干密度和含水率的快速高效测定。
- 干密度 /
- 含水率 /
- 经验公式 /
- TDR /
- 自适应
Abstract: The key of using the technology of time domain reflectometry (TDR) is to establish the empirical equation for the relationship among electromagnetic parameters, water content and dry density. Based on the one-step method, two empirical equations are established for the content, dry density, apparent dielectric constant and drop volt parameter, which can calculate the water content and dry density respectively. Then the influence laws of compaction energy, pore fluid conductivity and temperature on the calculated results by the new equations are analyzed. After calibration, the relative error of dry density is within ±5%, and the error of water content is within±0.02 g.g^-1. Meanwhile, an adaptive method is proposed to test the water content and dry density by using the TDR method conveniently and efficiently in the field tests in which the calibration tests may not be comducted.
- dry density /
- water content /
- empirical equation /
- TDR /
- adaptive system

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参考文献(30)

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