酸碱溶液环境中软岩的崩解试验及能量耗散特征研究
|
摘要
基于不同p H值溶液中泥质页岩的循环崩解试验,得到了不同粒径范围颗粒百分含量随崩解次数的变化关系。结果表明,p H值较小时小粒径的颗粒百分含量普遍较大,且随着崩解次数的增加而增大,最终趋于稳定。基于能量耗散原理,建立了岩石单次崩解后新增表面能及循环崩解累积新增表面能的计算公式,重点论述了p H值变化对泥质页岩崩解过程新增表面能的影响规律,结果表明:随着崩解循环次数的增加,岩石表面能单次增量越小,酸碱度变化对泥质页岩崩解表面能单次增量的影响较大;p H值越小,岩石循环崩解累积表面能增量越大,且趋于稳定所需的循环次数越少,说明酸性溶液有助于加速泥质页岩的崩解,碱性溶液对泥质页岩的崩解影响较小。最后,建立了泥质页岩崩解过程中能量耗散量预测的对数函数表征公式,分析认为,模型参数随p H值的增大基本呈相似的递减规律。
A series of disintegration tests was performed on an argillaceous shale in various acid and alkali solutions,from which the relationship between the percentage content of different size particles and the cycle number is determined.Results show that the lower the p H value is,the larger the percentage composition of granules,and the percentage increases with the increase of disintegration cycles and finally tends to be constant.Based on the principle of energy dissipation,theoretical computational formulations are developed for the incremental surface energy and cumulative incremental surface energy,and the influence of p H on the cumulative incremental surface energy is characterized.The incremental surface energy decreases with the increase of cycle number in an individual disintegration cycle,and is significantly influenced by acidity.Lower p H value may lead to more cumulative incremental surface energy; but disintegration characteristics are not influenced by alkaline solution.The energy dissipation of argillaceous shale in the process of disintegration is characterized as a logarithmic function.It is found that all the relationship curves have the same attenuation trend.The model parameters,which are inverse-analyzed from test data,decrease analogously with the increase of p H value.
A series of disintegration tests was performed on an argillaceous shale in various acid and alkali solutions,from which the relationship between the percentage content of different size particles and the cycle number is determined.Results show that the lower the p H value is,the larger the percentage composition of granules,and the percentage increases with the increase of disintegration cycles and finally tends to be constant.Based on the principle of energy dissipation,theoretical computational formulations are developed for the incremental surface energy and cumulative incremental surface energy,and the influence of p H on the cumulative incremental surface energy is characterized.The incremental surface energy decreases with the increase of cycle number in an individual disintegration cycle,and is significantly influenced by acidity.Lower p H value may lead to more cumulative incremental surface energy; but disintegration characteristics are not influenced by alkaline solution.The energy dissipation of argillaceous shale in the process of disintegration is characterized as a logarithmic function.It is found that all the relationship curves have the same attenuation trend.The model parameters,which are inverse-analyzed from test data,decrease analogously with the increase of p H value.
引文
[1]谭钅鉴益.广西覆盖型岩溶区土层崩解机制研究[J].工程地质学报,2001,9(3):272-277.TAN Jian-yi.Study on disintegration mechanism of solum in covering karst zones in Guangxi Province[J].Journal of Engineering Geology,2001,9(3):272-277.
[2]PHIENWEJ N.Ground response and support performance in a pheared phale,Stillwater Tunnel[D].Urbana:University of Illinois,1987.
[3]ERGULER Z A,SHAKOOR A.Relative contribution of various climatic processes in disintegration of clay-bearing rocks[J].Engineering Geology,2009,(108):36-42.
[4]ERGULER Z A,ULUSAY R.Assessment of physical disintegration characteristics of clay-bearing rocks:Disintegration index test and a new durability classification chart[J].Engineering Geology,2009,(105):11-19.
[5]张丹,陈安强,刘刚才.紫色泥岩水热条件下崩解过程的分维特性[J].岩土力学,2012,33(5):1341-1346.ZHANG Dan,CHEN An-qiang,LIU Gang-cai.Disintegration characteristics of purple mudstone based on fractal dimension under hydrothermal condition[J].Rock and Soil Mechanics,2012,33(5):1341-1346.
[6]康天合,柴肇云,王栋,等.物化型软岩块体崩解特性差异的试验研究[J].煤炭学报,2009,34(7):907-911.KANG Tian-he,CHAI Zhao-yun,WANG Dong,et al.Experimental study on block disintegration difference of physicochemical soft rock[J].Journal of China Coal Society,2009,34(7):907-911.
[7]刘俊新,谢强,曹新文,等.红层填料路堤变形研究[J].岩石力学与工程学报,2007,26(增刊1):3032-3039.LIU Jun-xin,XIE Qiang,CAO Xin-wen,et al.Researches on embankment deformations of red layer stuffing[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):3032-3039.
[8]范秋雁.膨胀岩与工程[M].北京:科学出版社,2008:20-30.
[9]刘晓明,熊力,刘建华,等.基于能量耗散原理的红砂岩崩解机制研究[J].中南大学学报(自然科学版),2011,42(10):3143-3149.LIU Xiao-ming,XIONG Li,LIU Jian-hua,et al.Slacking mechanism of red sandstone based on energy dissipation principle[J].Journal of Central South University(Science and Technology),2011,42(10):3143-3149.
[10]谢和平,彭瑞东,鞠杨.岩石破坏的能量分析初探[J].岩石力学与工程学报,2005,24(5):2603-2609.XIE He-ping,PENG Rui-dong,JU Yang.On energy analysis of rock failure[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(5):2603-2609.
[11]钱忠虎,谢和平.岩石变形破坏过程中的能量传递和耗散研究[J].四川大学学报(工程科学版),2008,40(2):26-31.QIAN Zhong-hu,XIE He-ping.Energy transfer and energy dissipation in rock deformation and fracture[J].Journal of Sichuan University(Engineering Science Edition),2008,40(2):26-31.
[12]何满潮,景海河,孙晓明.软岩工程力学[M].北京:科学出版社,2002.
[13]刘特洪,林天健.软岩工程设计理论与施工实践[M].北京:中国建筑工业出版社,2001.
[14]赵明华,邓觐宇,曹文贵.红砂岩崩解特性及其路堤填筑技术研究[J].中国公路学报,2003,16(3):1-5.ZHAO Ming-hua,DENG Jin-yu,CAO Wen-gui.Study of the disintegration character of red sandstone and the construction techniques of red sandstone embankment[J].China Journal of Highway and Transport,2003,16(3):1-5.
[15]吴道祥,刘宏杰,王国强.红层软岩崩解性室内试验研究[J].岩石力学与工程学报,2010,29(增刊2):4173-4179.WU Dao-xiang,LIU Hong-jie,WANG Guo-qiang.Laboratory experimental study of slaking characteristics of red bed soft rock[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(Supp.2):4173-4179.
[16]乔丽苹,刘建,冯夏庭.砂岩水物理化学损伤机制研究[J].岩石力学与工程学报,2007,26(10):2117-2124.QIAO Li-ping,LIU Jian,FENG Xia-ting.Study on damage mechanism of sandstone under hydro-physicochemical effects[J].Chinese Journal of Rock M echanics and Engineering,2007,26(10):2117-2124.
[2]PHIENWEJ N.Ground response and support performance in a pheared phale,Stillwater Tunnel[D].Urbana:University of Illinois,1987.
[3]ERGULER Z A,SHAKOOR A.Relative contribution of various climatic processes in disintegration of clay-bearing rocks[J].Engineering Geology,2009,(108):36-42.
[4]ERGULER Z A,ULUSAY R.Assessment of physical disintegration characteristics of clay-bearing rocks:Disintegration index test and a new durability classification chart[J].Engineering Geology,2009,(105):11-19.
[5]张丹,陈安强,刘刚才.紫色泥岩水热条件下崩解过程的分维特性[J].岩土力学,2012,33(5):1341-1346.ZHANG Dan,CHEN An-qiang,LIU Gang-cai.Disintegration characteristics of purple mudstone based on fractal dimension under hydrothermal condition[J].Rock and Soil Mechanics,2012,33(5):1341-1346.
[6]康天合,柴肇云,王栋,等.物化型软岩块体崩解特性差异的试验研究[J].煤炭学报,2009,34(7):907-911.KANG Tian-he,CHAI Zhao-yun,WANG Dong,et al.Experimental study on block disintegration difference of physicochemical soft rock[J].Journal of China Coal Society,2009,34(7):907-911.
[7]刘俊新,谢强,曹新文,等.红层填料路堤变形研究[J].岩石力学与工程学报,2007,26(增刊1):3032-3039.LIU Jun-xin,XIE Qiang,CAO Xin-wen,et al.Researches on embankment deformations of red layer stuffing[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):3032-3039.
[8]范秋雁.膨胀岩与工程[M].北京:科学出版社,2008:20-30.
[9]刘晓明,熊力,刘建华,等.基于能量耗散原理的红砂岩崩解机制研究[J].中南大学学报(自然科学版),2011,42(10):3143-3149.LIU Xiao-ming,XIONG Li,LIU Jian-hua,et al.Slacking mechanism of red sandstone based on energy dissipation principle[J].Journal of Central South University(Science and Technology),2011,42(10):3143-3149.
[10]谢和平,彭瑞东,鞠杨.岩石破坏的能量分析初探[J].岩石力学与工程学报,2005,24(5):2603-2609.XIE He-ping,PENG Rui-dong,JU Yang.On energy analysis of rock failure[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(5):2603-2609.
[11]钱忠虎,谢和平.岩石变形破坏过程中的能量传递和耗散研究[J].四川大学学报(工程科学版),2008,40(2):26-31.QIAN Zhong-hu,XIE He-ping.Energy transfer and energy dissipation in rock deformation and fracture[J].Journal of Sichuan University(Engineering Science Edition),2008,40(2):26-31.
[12]何满潮,景海河,孙晓明.软岩工程力学[M].北京:科学出版社,2002.
[13]刘特洪,林天健.软岩工程设计理论与施工实践[M].北京:中国建筑工业出版社,2001.
[14]赵明华,邓觐宇,曹文贵.红砂岩崩解特性及其路堤填筑技术研究[J].中国公路学报,2003,16(3):1-5.ZHAO Ming-hua,DENG Jin-yu,CAO Wen-gui.Study of the disintegration character of red sandstone and the construction techniques of red sandstone embankment[J].China Journal of Highway and Transport,2003,16(3):1-5.
[15]吴道祥,刘宏杰,王国强.红层软岩崩解性室内试验研究[J].岩石力学与工程学报,2010,29(增刊2):4173-4179.WU Dao-xiang,LIU Hong-jie,WANG Guo-qiang.Laboratory experimental study of slaking characteristics of red bed soft rock[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(Supp.2):4173-4179.
[16]乔丽苹,刘建,冯夏庭.砂岩水物理化学损伤机制研究[J].岩石力学与工程学报,2007,26(10):2117-2124.QIAO Li-ping,LIU Jian,FENG Xia-ting.Study on damage mechanism of sandstone under hydro-physicochemical effects[J].Chinese Journal of Rock M echanics and Engineering,2007,26(10):2117-2124.