本文關(guān)鍵詞：駐波比法測(cè)定黃土含水量的標(biāo)定試驗(yàn)研究　出處：《巖石力學(xué)與工程學(xué)報(bào)》2015年07期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 土力學(xué) 駐波比法 黃土 體積含水率 標(biāo)定試驗(yàn)

【摘要】：為提高駐波比(SWR)法測(cè)定黃土含水量的精度,對(duì)SWR土壤水分傳感器進(jìn)行標(biāo)定試驗(yàn),分別通過(guò)SWR法與烘干法測(cè)定Q3黃土和古土壤的含水率并進(jìn)行對(duì)比分析,探討干密度、結(jié)構(gòu)性和土質(zhì)差異對(duì)SWR土壤水分傳感器測(cè)試結(jié)果的影響,并建立相關(guān)數(shù)學(xué)修正模型。試驗(yàn)結(jié)果表明,SWR法含水率測(cè)量值較烘干法偏高,干密度變化對(duì)SWR法測(cè)量結(jié)果的影響不可忽略;通過(guò)建立考慮干密度影響的經(jīng)驗(yàn)修正模型對(duì)SWR法測(cè)量值進(jìn)行修正,當(dāng)體積含水率9.2%≤θw≤39.9%時(shí),誤差可控制在2%以內(nèi);當(dāng)39.9%≤θw≤46.3%時(shí),誤差可控制在3%以內(nèi),總體修正效果優(yōu)于SWR法與烘干法測(cè)量數(shù)據(jù)通過(guò)三次曲線擬合建立的修正公式;土的結(jié)構(gòu)性對(duì)SWR法測(cè)量結(jié)果影響不明顯,可采用重塑土的室內(nèi)標(biāo)定試驗(yàn)代替現(xiàn)場(chǎng)標(biāo)定試驗(yàn);黃土與古土壤因土質(zhì)差異,應(yīng)分別建立修正模型。
[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，

本文編號(hào)：1408358