上覆荷载对砾砂类硫酸盐渍土路基盐胀的影响
|
摘要
以需要采用当地粗颗粒盐渍土作为路基填料的路基工程为背景,在人工配制试验土样的基础上,选取典型粗颗粒盐渍土地区的砾砂类硫酸盐渍土,进行不同含盐量、含水率及初始干密度条件下上覆荷载对砾砂类硫酸盐渍土路基盐胀的影响规律研究。结果表明:在上覆荷载的作用下,不同含盐量条件下砾砂类硫酸盐渍土的盐胀率均随上覆荷载的增加而降低,且降幅较大;上覆荷载对低含盐量水平的砾砂类硫酸盐渍土抑制效果好于高含盐量水平;在严格控制含水率的工况下,当上覆荷载超过24.46～38.61kPa以后,上覆荷载对盐胀的抑制作用起主导作用。在标准压实度条件下,不同含水率下50kPa上覆荷载对天然砾砂类硫酸盐渍土盐胀量的抑制作用超过85%,且在高含水率下的盐胀抑制作用较强,可明显减小随含水率增大的盐胀增长率。
Taking the subgrade engineering which needs to use local coarse-grained saline soil as filling material as the background,on the basis of artificial preparation of test soil samples,the gravelly sand sulfate saline soil samples from typical coarse-grained saline soil areas were chosen to study the influence of overburden load on the salt expansion of gravelly sand sulfate saline soil subgrade under different salt content,water content and initial dry density conditions,respectively.Results show that,under the action of overburden load,the salt expansion rate of gravelly sand sulfate saline soil decreases at significant amplitude with the increase of overburden load under different salt content conditions.The inhibitory effect of overburden load on gravelly sand sulfate saline soil with low salt content is better than that with high salt content.Under the condition of strict control in water content,when the overburden load exceeds24.46～38.61 kPa,it plays a leading role in inhibiting salt expansion.Under the condition of standard compaction,the overburden load of 50 kPa with different water contents has an inhibitory effect of more than 85%on the salt expansion of natural gravelly sand sulfate saline soil.Moreover,the inhibitory effect on salt expansion is stronger under the condition of high water content,which can obviously reduce the salt expansion growth rate with the increase of water content.
Taking the subgrade engineering which needs to use local coarse-grained saline soil as filling material as the background,on the basis of artificial preparation of test soil samples,the gravelly sand sulfate saline soil samples from typical coarse-grained saline soil areas were chosen to study the influence of overburden load on the salt expansion of gravelly sand sulfate saline soil subgrade under different salt content,water content and initial dry density conditions,respectively.Results show that,under the action of overburden load,the salt expansion rate of gravelly sand sulfate saline soil decreases at significant amplitude with the increase of overburden load under different salt content conditions.The inhibitory effect of overburden load on gravelly sand sulfate saline soil with low salt content is better than that with high salt content.Under the condition of strict control in water content,when the overburden load exceeds24.46～38.61 kPa,it plays a leading role in inhibiting salt expansion.Under the condition of standard compaction,the overburden load of 50 kPa with different water contents has an inhibitory effect of more than 85%on the salt expansion of natural gravelly sand sulfate saline soil.Moreover,the inhibitory effect on salt expansion is stronger under the condition of high water content,which can obviously reduce the salt expansion growth rate with the increase of water content.
引文
[1]WU Qingbai,ZHU Yuanlin.Experimental Studies on Salt Expansion for Coarse Grain Soil under Constant Temperature[J].Cold Regions Science and Technology,2002,34(2):59-65.
[2]罗炳芳,潘菊英.粗粒土易溶盐含盐量测定方法的研究[J].公路,2005,11(11):192-193.
[3]包卫星,李志农,罗炳芳.公路工程粗粒盐渍土易溶盐试验方法研究[J].岩土工程学报,2010,32(5):792-797.(BAO Weixing,LI Zhinong,LUO Bingfang.Test Method for Soluble Salt in Saline Soil in Highway Engineering[J].Chinese Journal of Geotechnical Engineering,2010,32(5):792-797.in Chinese)
[4]丁兆民,张莎莎,杨晓华.粗颗粒盐渍土路用填料可用性指标研究[J].冰川冻土,2008,30(4):623-631.(DING Zhaomin,ZHANG Shasha,YANG Xiaohua.Experimental Studies of the Applicability Index of CoarseGrained Salty Soil as an Embankment Filling[J].Journal of Glaciology and Geocryology,2008,30(4):623-631.in Chinese)
[5]张莎莎,杨晓华,戴志仁.天然粗颗粒盐渍土多次冻融循环盐胀试验[J].中国公路学报,2009,22(4):28-32.(ZHANG Shasha,YANG Xiaohua,DAI Zhiren.Freezing-Thawing Cycles and Salt Expansion Test of Crude Coarse Grain Clay Salty Soil[J].China Journal of Highway and Transport,2009,22(4):28-32.in Chinese)
[6]张莎莎,谢永利,杨晓华,等.典型天然粗粒盐渍土盐胀微观机制分析[J].岩土力学,2010,31(1):123-127.(ZHANG Shasha,XIE Yongli,YANG Xiaohua,et al.Research on Microstructure of Crude Coarse Grain Saline Soil under Freezing and Thawing Cycles[J].Rock and Soil Mechanics,2010,31(1):123-127.in Chinese)
[7]程东幸,刘志伟,柯学.粗颗粒盐渍土溶陷性影响因素研究[J].工程地质学报,2013,21(1):109-114.(CHENG Dongxing,LIU Zhiwei,KE Xue.Field and Laboratory Tests for Influential Factors on Salt Resolving Slump of Coarse Particle Saline Soil[J].Journal of Engineering Geology,2013,21(1):109-114.in Chinese)
[8]张莎莎,杨晓华.粗粒盐渍土大型冻融循环剪切试验[J].长安大学学报:自然科学版,2012,32(3):11-16.(ZHANG Shasha,YANG Xiaohua.Large Shear Test on Coarse Saline Soil with Freeze-Thaw Cycle[J].Journal of Chang’an University:Natural Science Edition,2012,32(3):11-16.in Chinese)
[9]张莎莎,杨晓华,张秋美.天然粗粒盐渍土大型路堤模型试验研究[J].岩土工程学报,2012,34(5):842-847.(ZHANG Shasha,YANG Xiaohua,ZHANG Qiumei.Research on Large-Scale Embankment Model Test of Crude Coarse Grained Saline Soil[J].Chinese Journal of Geotechnical Engineering,2012,34(5):842-847.in Chinese)
[10]程东幸,许健,刘志伟,等.粗颗粒盐渍土大型剪切强度试验研究[J].水利与建筑工程学报,2017,15(5):149-153.(CHENG Dongxing,XU Jian,LIU Zhiwei,et al.Experiments on Large-Scale Direct Shear Strength of CoarseGrained Saline Soil[J].Journal of Water Resources and Architectural Engineering,2017,15(5):149-153.in Chinese)
[11]包卫星,张莎莎.路用砂类盐渍土盐胀及融陷特性试验研究[J].岩土工程学报,2016,38(4):734-739.(BAO Weixing,ZHANG Shasha.Experimental Study on Salt Expansion and Thawing Subsidence Properties of Sandy Saline Soil[J].Chinese Journal of Geotechnical Engineering,2016,38(4):734-739.in Chinese)
[12]张莎莎,王永威,包卫星,等.影响粗粒硫酸盐渍土盐胀特性的敏感因素研究[J].岩土工程学报,2017,39(5):946-952.(ZHANG Shasha,WANG Yongwei,BAO Weixing,et al.Research on the Sensitive Parameters of Embankment Deformation Behavior for Coarse-Grained Sulfate Saline Soil[J].Chinese Journal of Geotechnical Engineering,2017,39(5):946-952.in Chinese)
[13]杨晓华,王永威,张莎莎.基于调节因素的盐渍土盐胀率随含水率变化规律研究[J].中国公路学报,2016,29(10):12-19.(YANG Xiaohua,WANG Yongwei,ZHANG Shasha.Research on Changing Rules of Salt Expansion Rate of Salty Soil with Water Content Based on Regulation Factor[J].China Journal of Highway and Transport,2016,29(10):12-19.in Chinese)
[14]张莎莎,王永威,杨晓华,等.砾类亚硫酸盐渍土盐胀率的简化预测模型[J].中国公路学报,2015,28(11):1-7.(ZHANG Shasha,WANG Yongwei,YANG Xiaohua,et al.Simplified Prediction Model of Salt Expansion Rate for Gravel Sulfite Saline Soil[J].China Journal of Highway and Transport,2015,28(11):1-7.in Chinese)
[15]国家铁路局.TB 10001-2016铁路路基设计规范[S].北京:中国铁道出版社,2017.(National Railway Administration of the People’s Republic of China.TB 10001-2016,Code for Design of Railway Earth Structure[S].Beijing:China Railway Publishing House,2017.in Chinese)
[16]中华人民共和国铁道部.TB 10102-2010铁路工程土工试验规程[S].北京:中国铁道出版社,2011.(Ministry of Railways of the People’s Republic of China.TB 10102-2010,Test Regulations for Geotechnical Engineering of Railway Engineering[S].Beijing:China Railway Publishing House,2011.in Chinese)
[17]中华人民共和国住房和城乡建设部.GB/T 50942-2014盐渍土地区建筑技术规范[S].北京:中国计划出版社,2014.(Ministry of Housing and Urban-Rural Development of the People’s Republic of China.GB/T 50942-2014,Technical Code for Building in Saline Soil Regions[S].Beijing:China Planning Press,2014.in Chinese)
[18]王林峰,唐红梅,唐芬,等.基于正交设计的不同垫层落石冲击力试验研究[J].中国铁道科学,2017,38(5):16-21.(WANG Linfeng,TANG Hongmei,TANG Fen,et al.Experimental Study of Rockfall Impact Force with Different Cushion Based on Orthogonal Design[J].China Railway Science,2017,38(5):16-21.in Chinese)
[19]杜晓燕.微冻胀填料中填充料冻胀与骨架颗粒的相互作用机制[J].中国铁道科学,2017,38(6):9-15.(DU Xiaoyan.Interaction Mechanism of Filling Material and Skeleton Particle in Micro Frost Heaving Filler[J].China Railway Science,2017,38(6):9-15.in Chinese)
[2]罗炳芳,潘菊英.粗粒土易溶盐含盐量测定方法的研究[J].公路,2005,11(11):192-193.
[3]包卫星,李志农,罗炳芳.公路工程粗粒盐渍土易溶盐试验方法研究[J].岩土工程学报,2010,32(5):792-797.(BAO Weixing,LI Zhinong,LUO Bingfang.Test Method for Soluble Salt in Saline Soil in Highway Engineering[J].Chinese Journal of Geotechnical Engineering,2010,32(5):792-797.in Chinese)
[4]丁兆民,张莎莎,杨晓华.粗颗粒盐渍土路用填料可用性指标研究[J].冰川冻土,2008,30(4):623-631.(DING Zhaomin,ZHANG Shasha,YANG Xiaohua.Experimental Studies of the Applicability Index of CoarseGrained Salty Soil as an Embankment Filling[J].Journal of Glaciology and Geocryology,2008,30(4):623-631.in Chinese)
[5]张莎莎,杨晓华,戴志仁.天然粗颗粒盐渍土多次冻融循环盐胀试验[J].中国公路学报,2009,22(4):28-32.(ZHANG Shasha,YANG Xiaohua,DAI Zhiren.Freezing-Thawing Cycles and Salt Expansion Test of Crude Coarse Grain Clay Salty Soil[J].China Journal of Highway and Transport,2009,22(4):28-32.in Chinese)
[6]张莎莎,谢永利,杨晓华,等.典型天然粗粒盐渍土盐胀微观机制分析[J].岩土力学,2010,31(1):123-127.(ZHANG Shasha,XIE Yongli,YANG Xiaohua,et al.Research on Microstructure of Crude Coarse Grain Saline Soil under Freezing and Thawing Cycles[J].Rock and Soil Mechanics,2010,31(1):123-127.in Chinese)
[7]程东幸,刘志伟,柯学.粗颗粒盐渍土溶陷性影响因素研究[J].工程地质学报,2013,21(1):109-114.(CHENG Dongxing,LIU Zhiwei,KE Xue.Field and Laboratory Tests for Influential Factors on Salt Resolving Slump of Coarse Particle Saline Soil[J].Journal of Engineering Geology,2013,21(1):109-114.in Chinese)
[8]张莎莎,杨晓华.粗粒盐渍土大型冻融循环剪切试验[J].长安大学学报:自然科学版,2012,32(3):11-16.(ZHANG Shasha,YANG Xiaohua.Large Shear Test on Coarse Saline Soil with Freeze-Thaw Cycle[J].Journal of Chang’an University:Natural Science Edition,2012,32(3):11-16.in Chinese)
[9]张莎莎,杨晓华,张秋美.天然粗粒盐渍土大型路堤模型试验研究[J].岩土工程学报,2012,34(5):842-847.(ZHANG Shasha,YANG Xiaohua,ZHANG Qiumei.Research on Large-Scale Embankment Model Test of Crude Coarse Grained Saline Soil[J].Chinese Journal of Geotechnical Engineering,2012,34(5):842-847.in Chinese)
[10]程东幸,许健,刘志伟,等.粗颗粒盐渍土大型剪切强度试验研究[J].水利与建筑工程学报,2017,15(5):149-153.(CHENG Dongxing,XU Jian,LIU Zhiwei,et al.Experiments on Large-Scale Direct Shear Strength of CoarseGrained Saline Soil[J].Journal of Water Resources and Architectural Engineering,2017,15(5):149-153.in Chinese)
[11]包卫星,张莎莎.路用砂类盐渍土盐胀及融陷特性试验研究[J].岩土工程学报,2016,38(4):734-739.(BAO Weixing,ZHANG Shasha.Experimental Study on Salt Expansion and Thawing Subsidence Properties of Sandy Saline Soil[J].Chinese Journal of Geotechnical Engineering,2016,38(4):734-739.in Chinese)
[12]张莎莎,王永威,包卫星,等.影响粗粒硫酸盐渍土盐胀特性的敏感因素研究[J].岩土工程学报,2017,39(5):946-952.(ZHANG Shasha,WANG Yongwei,BAO Weixing,et al.Research on the Sensitive Parameters of Embankment Deformation Behavior for Coarse-Grained Sulfate Saline Soil[J].Chinese Journal of Geotechnical Engineering,2017,39(5):946-952.in Chinese)
[13]杨晓华,王永威,张莎莎.基于调节因素的盐渍土盐胀率随含水率变化规律研究[J].中国公路学报,2016,29(10):12-19.(YANG Xiaohua,WANG Yongwei,ZHANG Shasha.Research on Changing Rules of Salt Expansion Rate of Salty Soil with Water Content Based on Regulation Factor[J].China Journal of Highway and Transport,2016,29(10):12-19.in Chinese)
[14]张莎莎,王永威,杨晓华,等.砾类亚硫酸盐渍土盐胀率的简化预测模型[J].中国公路学报,2015,28(11):1-7.(ZHANG Shasha,WANG Yongwei,YANG Xiaohua,et al.Simplified Prediction Model of Salt Expansion Rate for Gravel Sulfite Saline Soil[J].China Journal of Highway and Transport,2015,28(11):1-7.in Chinese)
[15]国家铁路局.TB 10001-2016铁路路基设计规范[S].北京:中国铁道出版社,2017.(National Railway Administration of the People’s Republic of China.TB 10001-2016,Code for Design of Railway Earth Structure[S].Beijing:China Railway Publishing House,2017.in Chinese)
[16]中华人民共和国铁道部.TB 10102-2010铁路工程土工试验规程[S].北京:中国铁道出版社,2011.(Ministry of Railways of the People’s Republic of China.TB 10102-2010,Test Regulations for Geotechnical Engineering of Railway Engineering[S].Beijing:China Railway Publishing House,2011.in Chinese)
[17]中华人民共和国住房和城乡建设部.GB/T 50942-2014盐渍土地区建筑技术规范[S].北京:中国计划出版社,2014.(Ministry of Housing and Urban-Rural Development of the People’s Republic of China.GB/T 50942-2014,Technical Code for Building in Saline Soil Regions[S].Beijing:China Planning Press,2014.in Chinese)
[18]王林峰,唐红梅,唐芬,等.基于正交设计的不同垫层落石冲击力试验研究[J].中国铁道科学,2017,38(5):16-21.(WANG Linfeng,TANG Hongmei,TANG Fen,et al.Experimental Study of Rockfall Impact Force with Different Cushion Based on Orthogonal Design[J].China Railway Science,2017,38(5):16-21.in Chinese)
[19]杜晓燕.微冻胀填料中填充料冻胀与骨架颗粒的相互作用机制[J].中国铁道科学,2017,38(6):9-15.(DU Xiaoyan.Interaction Mechanism of Filling Material and Skeleton Particle in Micro Frost Heaving Filler[J].China Railway Science,2017,38(6):9-15.in Chinese)
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |