矿产与地质
礦產與地質
광산여지질
MINERAL RESOURCES AND GEOLOGY
2015年
1期
114-118
,共5页
重金属污染土%质量比%土工试验%本构关系
重金屬汙染土%質量比%土工試驗%本構關繫
중금속오염토%질량비%토공시험%본구관계
heavy metal contaminated soil%mass ratio%soil test%constitutive relation
通过三轴试验、压缩试验和直剪试验对重金属污染土进行了研究，在100、200、300KPa 围压条件下，对5种重金属含量不同的污染土试样：一般土、污染土(重金属元素质量比分别为：1%、3%、5%、7%)进行三轴对比试验，试验结果表明：污染土的强度随着重金属元素的含量的增加显著降低，围压增大对重金属含量低的污染土的强度的影响不显著，质量比小于3%时，峰值强度降低10%~15%，质量比大于5%时，峰值强度降低40%~50%；直剪试验结果表明：质量比小于3%的污染土抗剪强度-垂直压力曲线基本平行，垂直压力与抗剪强度成正比，抗剪强度降低幅度为5%~10%，质量比大于5%的污染土抗剪强度-垂直压力曲线表现为不规则，抗剪强度降低45%~55%左右；压缩试验结果表明，污染土与一般土的压缩量差别较大，质量比超过5%以上时对压缩性的影响尤为显著。
通過三軸試驗、壓縮試驗和直剪試驗對重金屬汙染土進行瞭研究，在100、200、300KPa 圍壓條件下，對5種重金屬含量不同的汙染土試樣：一般土、汙染土(重金屬元素質量比分彆為：1%、3%、5%、7%)進行三軸對比試驗，試驗結果錶明：汙染土的彊度隨著重金屬元素的含量的增加顯著降低，圍壓增大對重金屬含量低的汙染土的彊度的影響不顯著，質量比小于3%時，峰值彊度降低10%~15%，質量比大于5%時，峰值彊度降低40%~50%；直剪試驗結果錶明：質量比小于3%的汙染土抗剪彊度-垂直壓力麯線基本平行，垂直壓力與抗剪彊度成正比，抗剪彊度降低幅度為5%~10%，質量比大于5%的汙染土抗剪彊度-垂直壓力麯線錶現為不規則，抗剪彊度降低45%~55%左右；壓縮試驗結果錶明，汙染土與一般土的壓縮量差彆較大，質量比超過5%以上時對壓縮性的影響尤為顯著。
통과삼축시험、압축시험화직전시험대중금속오염토진행료연구，재100、200、300KPa 위압조건하，대5충중금속함량불동적오염토시양：일반토、오염토(중금속원소질량비분별위：1%、3%、5%、7%)진행삼축대비시험，시험결과표명：오염토적강도수착중금속원소적함량적증가현저강저，위압증대대중금속함량저적오염토적강도적영향불현저，질량비소우3%시，봉치강도강저10%~15%，질량비대우5%시，봉치강도강저40%~50%；직전시험결과표명：질량비소우3%적오염토항전강도-수직압력곡선기본평행，수직압력여항전강도성정비，항전강도강저폭도위5%~10%，질량비대우5%적오염토항전강도-수직압력곡선표현위불규칙，항전강도강저45%~55%좌우；압축시험결과표명，오염토여일반토적압축량차별교대，질량비초과5%이상시대압축성적영향우위현저。
This paper studied on heavy metal contaminated soil through triaxial test,compression test and di-rect shear test.Under the confining pressures of 100,200 and 300 kPa,triaxial comparison test is conducted on 5 kinds of contaminated soil samples with different contents of heavy metal (1 kind of ordinary soil and 4 kinds of contaminated soil with heavy metal mass ratio of 1%,3%,5% and 7% respectively),and the re-sults suggest that the strength of contaminated soil decreases as the content of heavy metal content increases, and the growth of confining pressure has no significant influence on the strength of contaminated soil with low content of heavy metal.While the mass ratio is less than 3%,the peak strength decreases by 10% to 15%;while the mass ratio is more than 5%,the peak strength decreases by 40% to 50%.The results of di-rect shear test suggest that in contaminated soil with mass ratio of less than 3% the relation curve of shear strength and vertical pressure is parallel in general,and vertical pressure is in direct proportion to shear strength,and shear strength decreases by 45% to 55%;in contaminated soil with mass ratio of more than 5%,the relation curve of shear strength and vertical pressure is irregular and shear strength decreases by 45% to 55%.The results of compression test suggest that the amount of compression of contaminated soil is largely different than that of ordinary soil,and it has significant influence on compressibility while the mass ratio is more than 5%.
