西安科技大学地质与环境学院,陕西,西安,710054
纸质出版:2021
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刘驰洋,唐皓,王念秦,李华华,吴冠男.酸性环境下Q
Liu Chiyang. Experimental Study on Compression Characteristics of Q2 Loess in Acidic Environment[J]. 2021, (1): 125-132.
针对酸性污染土物理力学性质恶化的现象,采用室内人工模拟受酸液污染土样的方法,开展土常规试验、压缩试验探究 Q2黄土在酸液浸泡时间和酸液浓度双因素作用下,试样孔隙比、含水率等基本物理及压缩系数、压缩模量等指标和压缩 e-p 曲线的变化规律,以及水?酸耦合作用对黄土压缩性的影响规律。结果表明:浸泡时间一定时,随酸液浓度增大,含水率、孔隙比、压缩系数在逐渐增大,压缩模量在减小。浸泡 12 d 时,酸液浓度 0.1 mol/L 增加至 3 mol/L,压缩系数 a1-2由 0.355 MPa-1 增大到 1.275 MPa-1,压缩模量 Es1-2由 5.580 MPa 减小至 1.855 MPa;酸液浓度一定时,随浸泡时间延长,含水率、孔隙比、压缩系数在逐渐增大,压缩模量在减小。酸液浓度 3 mol/L 时,浸泡时间从 1 d 至 12 d,压缩系数 a1-2由 0.308 MPa-1 增大到 1.275 MPa-1,压缩模量 Es1-2由 6.301 MPa 减小至 1.855 MPa;水?酸耦合作用提高了黄土压缩性,且在充分浸泡条件下,酸液对黄土压缩性的影响远大于水的影响。研究结果可为酸蚀黄土区工程建设提供相关参考。
In view of the deterioration of physical and mechanical properties of soil due to acidic pollution ,laboratory routine and compression tests have been conducted on artificial acid samples of Q2 loess soil to investigate double factors of acid soaking time and acid concentration on the void ratio, moisture content and other basic physical parameters,as well as the variation of compression coefficient,compression modulus and the compression curve of ep. Meanwhile,the water-acid coupling effect on the compressibility of loess is studied. The results show that under the same acid soaking time, the moisture content,void ratio,and compression coefficient gradually increased with the increase of acid concentration,while the compressibility modulus reduced. After soaking for 12 days,the acid concentration increased from 0.1 mol/L to 3 mol/L,and the compression coefficient a1-2 increased from 0.355 MPa-1 to 1.275 MPa-1,accompanied with the decrease of compression modulus Es1-2 from 5.580 MPa to 1.855 MPa. When the acid concentration is constant,with the extension of soaking time,the moisture content,void ratio and compression coefficient increased gradually,and the compression modulus decreased. At the acid concentration of 3 mol/L,with the increase of the soakingtime from 1 d to 12 d,the compression coefficient a1-2 increased from 0.308 MPa-1 to 1.275 MPa-1,and the compression modulus Es1-2 decreased from 6.301 MPa to 1.855 MPa. The coupling effect of water and acid improves the loess compressibility,and the effect of acid solution on the loess compressibility is much greater than that of water under the condition of full immersion. The results can be used as a reference for construction activities in acid etched loess areas.
谢定义.试论我国黄土力学研究中的若干新趋向[J].岩土工程学报,2001,23(1):3-13.Xie D Y.Exploration of some new tendencies in re? search of loess soil mechanics[J].Chinese Journal of Geotechnical Engineering,2001,23(1):3-13.(in Chi? nese)
郭玉文,宋菲,加藤诚.黄土中碳酸钙分布的能谱分析[J].岩土工程学报,2005,27(9):1004-1007.Guo Y W,Song F,Jia T Ch.EDX of CaCO3 distribu? tion in loess[J].Chinese Journal of Geotechnical Engi? neering,2005,27(9):1004-1007.(in Chinese)
马尧,胡宝群,孙占学.矿山废水处理的研究综述[J].铀矿冶,2006,25(4):199-203.Ma Y,Hu B Q,Sun Zh X.A summary of studies on mine wastewater treatment[J].Uranium Mining and Metallurgy,2006,25(4):199-203.(in Chinese)
查甫生,刘晶晶,夏磊,等.重金属污染土的工程性质试验研究[J].地下空间与工程学报,2014,10(增 2):1982-1985.Zha P Sh,Liu J J,Xia L,et al.Engineering properties of heavy metal contaminated soil[J].Chinese Journal of Underground Space and Engineering,2014,10(Sup 2):1982-1985.(in Chinese)
张志红,李红艳,师玉敏.重金属 Cu~(2+)污染土渗透特性试验及微观结构分析[J].土木工程学报,2014,47(12):122-129.Zhang Zh H,Li H Y,Shi Y M.Experimental study on permeability properties and microstructure of clay con? taminated by Cu~(2+)[J].China Civil Engineering Journal,2014,47(12):122-129.(in Chinese)
姬凤玲,李强.酸性溶液对花岗岩残积土物理力学特性的影响[J].地下空间与工程学报,2017,13(6):1506-1510.Ji F L,Li Q.Effect of acid solution on physico-mechan? ical properties of granite residual soil[J].Chinese Jour? nal of Underground Space and Engineering,2017,13(6):1506-1510.(in Chinese)
张金利,张林林,谷鑫.重金属 Pb(Ⅱ)在膨润土上去除特性研究[J].岩土工程学报,2013,35(1):117-123.Zhang J L,Zhang L L,Gu X.Removal behaviors of heavy metal Pb(II)by use of bentonite[J].Chinese Journal of Geotechnical Engineering,2013,35(1):117-123.(in Chinese)
范日东,杜延军,陈左波,等.受铅污染的土-膨润土竖向隔离墙材料的压缩及渗透特性试验研究[J].岩土工程学报,2013,35(5):841-848.Fan R D,Du Y J,Chen Z B,et al.Compressibility and permeability characteristics of lead contaminated soil-bentonite vertical cutoff wall backfills[J].Chinese Journal of Geotechnical Engineering,2013,35(5):841-848.(in Chinese)
高彦斌,刘佳丹,王雨滢.酸碱污染重塑粉质黏土的塑性及其与力学特性的关系[J].岩土工程学报,2018,40(11):2103-2109.Gao Y B,Liu J D,Wang Y Y.Plasticity and its rela? tionship with mechanical properties of a remolded silty clay contaminated by several acids and bases[J].Chi? nese Journal of Geotechnical Engineering,2018,40(11):2103-2109.(in Chinese)
Rajput V S,Higgins A J,Singley M E.Cleaning of ex? cavated soil contaminated with hazardous organic com? pounds by washing[J].Water Environment Research,1994,66(6):819-827.
胡再强,张耀,岳文青,等.酸性环境下黄土湿陷性试验与湿陷敏感性研究[J].岩石力学与工程学报,2017,36(7):1748-1756.Hu Z Q,Zhang Y,Yue W Q,et al.Collapsible tests of loess under acid conditions and related sensitivity analy? sis[J].Chinese Journal of Rock Mechanics and Engi? neering,2017,36(7):1748-1756.(in Chinese)
张耀,胡再强,陈昊,等.酸性溶液对黄土结构改良的试验研究[J].岩土工程学报,2018,40(4):681-688.Zhang Y,Hu Z Q,Chen H,et al.Experimental study on evolution of loess structure using acid solutions[J].Chinese Journal of Geotechnical Engineering,2018,40(4):681-688.(in Chinese)
王绪民,陈善雄,程昌炳.酸性溶液浸泡下原状黄土物理力学特性试验研究[J].岩土工程学报,2013,35(9):1619-1626.Wang X M,Chen Sh X,Cheng Ch B.Experimental study on physico-mechanical characteristics of undis? turbed loess soaked in acid solution[J].Chinese Journal of Geotechnical Engineering,2013,35(9):1619-1626.(in Chinese)
土工试验规程:SL 237—1999[S].北京:水利水电出版社,2000.Geotechnical test procedure:SL 237—1999[S].Bei? jing:Water Conservancy and Hydropower Publishing House,2000.(in Chinese)
刘汉龙,朱春鹏,张晓璐.酸碱污染土基本物理性质的室内测试研究[J].岩土工程学报,2008,30(8):1213-1217.Liu H L,Zhu C P,Zhang X L.Fundamental physical properties of soil polluted by acid and alkali in laboratory [J].Chinese Journal of Geotechnical Engineering,2008,30(8):1213-1217.(in Chinese)
朱春鹏,刘汉龙,张晓璐.酸碱污染土压缩特性的室内试验研究[J].岩土工程学报,2008,30(10):1477-1483.Zhu Ch P,Liu H L,Zhang X L.Laboratory tests on compression characteristics of soil polluted by acid and alkali[J].Chinese Journal of Geotechnical Engineering,2008,30(10):1477-1483.(in Chinese)
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