干-湿循环条件下川中膨胀岩崩解特性的试验研究
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摘要
为了研究膨胀岩崩解过程与崩解物粒径的变化规律,以川中红层膨胀岩为例,进行了干-湿循环条件下膨胀岩的崩解性试验。结果表明:干-湿循环条件下,膨胀岩试样崩解状态变化与崩解物颗粒含量变化紧密相关。膨胀岩浸水时间越长,试样的崩解程度相对越强,但相差不大,且崩解物颗粒越小,浸水时间对其崩解程度的影响越小;对比试样的膨胀率发展和崩解程度可以得出,试样膨胀和崩解在浸水初的短时间内迅速吸水发展,之后速率变缓,膨胀速率和崩解程度正相关。
Taking the central Sichuan red-swelled swelling rock as an example,the disintegration test of swelling rock under dry-wet cycle was carried out,and the disintegration process and the change rule of the disintegration particle size were studied.The results showed that under the dry-wet cycle conditions,the change of the disintegration state of the swelling rock sample was closely related to the change of the partical content of the disintegration.The longer the immersion time of the swelling rock in the test was,the stronger the disintegration degree of the sample was,but the difference was not signifecent,and the smaller the disintegration granule was,the smaller the influence of the immersion time on the disintegration degree was.Comparing with the expansion rate and the degree of disintegration of the sample,it could be concluded that the expansion rate and disintegration of the sample rapidly absorbed water and develoedped in the short time at the beginning of immersion,and then the rate became slower.There was a positive correlation between the expansion rate and the degree of disintegration.
Taking the central Sichuan red-swelled swelling rock as an example,the disintegration test of swelling rock under dry-wet cycle was carried out,and the disintegration process and the change rule of the disintegration particle size were studied.The results showed that under the dry-wet cycle conditions,the change of the disintegration state of the swelling rock sample was closely related to the change of the partical content of the disintegration.The longer the immersion time of the swelling rock in the test was,the stronger the disintegration degree of the sample was,but the difference was not signifecent,and the smaller the disintegration granule was,the smaller the influence of the immersion time on the disintegration degree was.Comparing with the expansion rate and the degree of disintegration of the sample,it could be concluded that the expansion rate and disintegration of the sample rapidly absorbed water and develoedped in the short time at the beginning of immersion,and then the rate became slower.There was a positive correlation between the expansion rate and the degree of disintegration.
引文
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[2] 徐晗,黄斌,何晓民.膨胀岩工程特性试验研究[J].水利学报,2007,38(s):716-722.XU H,HUANG B,HE X M.Effect of drying and wetting cycles on disintegration behavior of swelling mudstone and its grading entropy characterization[J].Journal of Hydraulic Engineering,2017,38(s):716-722.
[3] 梁冰,谭晓引,姜利国,等.冻融及干湿循环对泥质岩崩解特性影响的试验研究[J].岩土工程学报,2016,38(4):705-711.LIANG B,TAN X Y,JIANG L G,et al.Effects of freeze-thaw and drying-wetting cycles on slaking characteristics of mudstone[J].Chinese Journal of Geotechnical Engineering,2016,38(4):705-711.
[4] 张巍,尚彦军,曲永新,等.泥质膨胀岩崩解物粒径分布与膨胀性关系试验研究[J].岩土力学,2013,34(1):67-79.ZHANG W,SHANG Y J,QU Y X,et al.Grain size distribution of collapsed scraps of argillaceous rock and its relationship with expansibility:An experimental study[J].Rock and Soil Mechanics,2013,34(1):67-79.
[5] 文江泉,韩会增.膨胀岩的判别与分类初探[J].铁道工程学报,1996,50(2):231-237.WEN J Q,HAN H Z.Preliminary Study on Discrimination and Classification of swelling rocks[J].Journal of Railway Engineering Society,1996,50(2):231-237.
[6] 王海龙,朱宝龙,孙明远,等.川西南地区膨胀岩的膨胀特性[J].西南科技大学学报,2017,32(2):42-45.WANG H L,ZHU B L,SUN M Y,et al.Experimental study on the properties of swelling rock in southwest Sichuan[J].Journal of Southwest University of Science and Technology,2017,32(2):42-45.
[7] 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(s2):4173-4179.WU D X,LIU H J,WANG G Q.Laboratory experimental study of slaking characteristics of red-bed soft rock[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(s2):4173-4179.
[8] GAMBLE J C.Durability-plasticity classification of shales and other argillaceous rocks[D].Urbana:University of Illinois at Urbana-Champaign,1971.
[9] YAMAGUCHI H,YOSHIDA Y,KUROSHIMA I,et al.Slaking and shear properties of mudstone[C]//Rock Mechanics and Power Plants.Rotterdam:Balkema A A,1988:133-134.
[10] 张泽,马巍,PENDIN VADIM V,等.不同含水量亚黏土的崩解特性实验研究[J].水文地质工程地质,2014,41(4):104-107.
[11] ZHANG Z,MA W,PENDIN VADIM V,et al.Experimental study of the disintegration characteristics of loam with different moisture content[J].Hydrogeology & Engineering Geology,2014,41(4):104-107.
[12] 曾庆建,刘宝臣,张炳辉,等.红黏土崩解特性试验研究[J].水文地质工程地质,2018,45(3):93-97.ZENG Q J,LIU B C,ZHANG B H,et al.An experimental study of the disintegration characteristics of red clay[J].Hydrogeology&Engineering Geology,2018,45(3):93-97.
[13] 中华人民共和国铁道部.TB10038—2001 铁路工程特殊岩土勘察规程[S].北京:中国铁道出版社,2001.MINISTRY OF RAILWAYS OF THE PEOPLE’S REPUBLIC OF CHINA.TB10038—2001 Code for special Soil and Rock Investigation of Railway Engineering[S].Beijing:China railway press,2001.