驻波比法测定黄土含水量的标定试验研究

发布时间：2018-01-11 06:02

  本文关键词：驻波比法测定黄土含水量的标定试验研究　出处：《岩石力学与工程学报》2015年07期 　论文类型：期刊论文

  更多相关文章： 土力学 驻波比法 黄土 体积含水率 标定试验

【摘要】：为提高驻波比(SWR)法测定黄土含水量的精度,对SWR土壤水分传感器进行标定试验,分别通过SWR法与烘干法测定Q3黄土和古土壤的含水率并进行对比分析,探讨干密度、结构性和土质差异对SWR土壤水分传感器测试结果的影响,并建立相关数学修正模型。试验结果表明,SWR法含水率测量值较烘干法偏高,干密度变化对SWR法测量结果的影响不可忽略;通过建立考虑干密度影响的经验修正模型对SWR法测量值进行修正,当体积含水率9.2%≤θw≤39.9%时,误差可控制在2%以内;当39.9%≤θw≤46.3%时,误差可控制在3%以内,总体修正效果优于SWR法与烘干法测量数据通过三次曲线拟合建立的修正公式;土的结构性对SWR法测量结果影响不明显,可采用重塑土的室内标定试验代替现场标定试验;黄土与古土壤因土质差异,应分别建立修正模型。
[Abstract]:In order to improve the accuracy of standing wave ratio (VSWR) method for the determination of loess water content, the calibration test of SWR soil moisture sensor was carried out. The moisture content of Q3 loess and paleosol was measured by SWR method and drying method, and the effect of dry density, structure and soil quality difference on the results of SWR soil moisture sensor was discussed. The experimental results show that the water content measured by SWR method is higher than that by drying method, and the influence of dry density change on the measurement results can not be ignored. By establishing an empirical correction model considering the influence of dry density, the measurement value of SWR method is corrected. When the volume moisture content is 9.2% 鈮，

本文编号：1408358