不同环境对水泥土动应力影响的试验研究
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摘要
为研究腐蚀性介质和动荷载对水泥土力学特性的影响,通过水泥土的动三轴压缩试验,获取水泥土动应力试验参数,分析各种环境对水泥土动强度的影响。试验结果表明,当硫酸钠溶液浓度小于0.03mol/L时水泥土的动强度逐步增大,当硫酸钠溶液浓度大于0.03mol/L时水泥土的动强度又逐步降低;随着氯化钠溶液浓度的增大,其动强度逐步降低;随着腐蚀时间的增加,0.03mol/L硫酸钠溶液的水泥土动强度逐步增大,而0.1 mol/L和0.3 mol/L硫酸钠溶液的水泥土动强度均逐步降低;水泥掺入比和围压越大,水泥土动强度越大;当溶液浓度小于0.03mol/L时硫酸钠环境对水泥土的动强度有增强效应,且浓度大于0.03mol/L时硫酸钠环境对水泥土具有腐蚀破坏效应,且硫酸钠溶液腐蚀效应大于氯化钠溶液腐蚀效应。
Dynamic triaxial compression tests are conducted to study the effects of corrosive media and dynamic loads on the mechanical properties of cement soil.The experimental parameters of dynamic stress are obtained,and the effects of the dynamic strength of the cement soil are analyzed in different environments.Results show a gradual increase in the dynamic strength of the cement soil with an increase in the concentration of sodium sulfate corrosion solution when it is less than 0.03mol/L.However,when the concentration is greater than 0.03 mol/L,there is a gradual decrease in the dynamic strength of the cement soil.In addition,there is a gradual decrease in the dynamic strength of cement soil with an increase in the concentration of sodium chloride solution.Furthermore,there is a gradual increase in the dynamic strength of cement soil in 0.03mol/L of sodium sulfate solution with an extension of corrosion time.Results show the following:when the concentration of sodium sulfate solution is between 0.1~0.3mol/L,there is a gradual decrease in the dynamic strength of the cement soil.Moreover,when the cemented content is at a greater ratio,the stronger dynamic strength of cement soil is greater.Furthermore,when the confining pressure is greater,the dynamic strength of cement soil is stronger.In addition,when the solution concentration is less than 0.03mol/L,the dynamic strength of cement soil is enhanced in a sodium sulfate environment,but when it is greater than 0.03mol/L,the cement soil is corroded and damaged within the same environment and the corrosion effect is greater than that of the sodium chloride solution.
Dynamic triaxial compression tests are conducted to study the effects of corrosive media and dynamic loads on the mechanical properties of cement soil.The experimental parameters of dynamic stress are obtained,and the effects of the dynamic strength of the cement soil are analyzed in different environments.Results show a gradual increase in the dynamic strength of the cement soil with an increase in the concentration of sodium sulfate corrosion solution when it is less than 0.03mol/L.However,when the concentration is greater than 0.03 mol/L,there is a gradual decrease in the dynamic strength of the cement soil.In addition,there is a gradual decrease in the dynamic strength of cement soil with an increase in the concentration of sodium chloride solution.Furthermore,there is a gradual increase in the dynamic strength of cement soil in 0.03mol/L of sodium sulfate solution with an extension of corrosion time.Results show the following:when the concentration of sodium sulfate solution is between 0.1~0.3mol/L,there is a gradual decrease in the dynamic strength of the cement soil.Moreover,when the cemented content is at a greater ratio,the stronger dynamic strength of cement soil is greater.Furthermore,when the confining pressure is greater,the dynamic strength of cement soil is stronger.In addition,when the solution concentration is less than 0.03mol/L,the dynamic strength of cement soil is enhanced in a sodium sulfate environment,but when it is greater than 0.03mol/L,the cement soil is corroded and damaged within the same environment and the corrosion effect is greater than that of the sodium chloride solution.
引文
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[18]李庆冰.橡胶水泥土动力特性的试验研究[D].沈阳:沈阳建筑大学,2011.LI Qing-bing.Experimental Research on Dynamic Characteristics of Rubberized Cement-soil[D].Shenyang:Shenyang Jianzhu University,2011.(in Chinese)
[19]蔡袁强,梁旭,李坤.水泥土-土复合试样的动力特性[J].水利学报,2003(10):19-25.CAI Yuan-qiang,LIANG Xu,LI Kun.Dynamic Characteristics of Composite Sample of Cemented Clay-clay[J].Journal of Hydraulic Engineering,2003(10):19-25.(in Chinese)
[20]谭凡,饶锡保,黄斌,等.饱和尾矿粉土动力特性试验研究[J].地震工程学报,2015,37(3):772-777.TAN Fan,RAO Xi-bao,HUANG Bin,et al.Experimental Study or the Dynamic Characteristics of Tailings Silts[J].China Earthquake Engineering Journal,2015,37(3):772-777.(in Chinese)
[21]冷建,叶冠林,刘学增,等.循环荷载对上海软土动力特性影响规律的试验研究[J].地震工程学报,2015,38(4):1049-1052.LENG Jian,YE Guan-lin,LIU Xue-zeng,et al.Experimental Study on the Dynamic Characteristics of Shanghai Soft Clay Subjected to Cyclic Loading[J].China Earthquake Engineering Journal,2015,38(4):1049-1052.(in Chinese)
[2]陈四利,宁宝宽.岩土材料的环境效应[M].北京:冶金工业出版社,2010.CHEN Si-li,NING Bao-kuan.Environment Effect of Geotechnical Material[M].Beijing:Metallurgical Industry Press,2010.(in Chinese)
[3]刘恩军.侵蚀性地下水对地下结构工程的影响、评价标准及其防治措施[J].地下工程与隧道,2001(4):38-45.LIU En-jun.Erosive Impact of Groundwater on the Underground Structure Engineering,Evaluation Standards and Control Measures[J].Underground Works and Tunnels,2001(4):38-45.(in Chinese)
[4]赵振亚,申向东,贾尚华.Ca(OH)2对低掺量水泥土的强度影响[J].土木建筑与环境工程,2012,34(增刊):170-173.ZHAO Zhen-ya,SHEN Xiang-dong,JIA Shang-hua.Influence of Ca(OH)2on Strength of Low Proportional Cemented Soil[J].Journal of Civil,Architectural&Engineering,2012,34(Supp):170-173.(in Chinese)
[5]朱崇辉,王增红.水泥土渗透系数变化规律试验研究[J].长江科学院院报,2013(7):59-63.ZHU Chong-hui,WANG Zeng-hong.Experimental Research on the Variation Regularity of Permeability Coefficient of Cement Soil[J].Journal of Yangtze River Scientific Research Institute,2013(7):59-63.(in Chinese)
[6]宁宝宽,陈四利,刘斌,等.环境侵蚀下水泥土的力学效应试验研究[J].岩土力学,2005,26(4):600-603.NING Bao-kuan,CHEN Si-li,LIU Bin,et al.Experimental Study of Cemented Soil under Environmental Erosion[J].Rock and Soil Mechanics,2005,26(4):600-603.(in Chinese)
[7]宁宝宽,刘斌,陈四利.环境侵蚀对水泥土桩承载力影响的试验及分析[J].东北大学学报,2005,26(1):95-98.NING Bao-kuan,LIU Bin,CHEN Si-li.Bearing Capacity Study of Cement-mixed Soil Pile under Environmental Erosion[J].Journal of Northeastern University,2005,26(1):95-98.(in Chinese)
[8]宁宝宽,陈四利,丁梧秀,等.环境侵蚀下水泥土的强度及细观破裂过程分析[J].岩土力学,2009,10(8):2215-2219.NING Bao-kuan,CHEN Si-li,DING Wu-xiu,et al.Analysis of Meso-fracture Process of Cemented Soil under Environmental Erosion[J].Rock and Soil Mechanics,2009,10(8):2215-2219.(in Chinese)
[9]陈四利,宁宝宽,刘一芳,等.化学侵蚀下水泥土的无侧限抗压强度试验[J].新型建筑材料,2006(6):40-42.CHEN Si-li,NING Bao-kuan,LIU Yi-fang,et al.Experimental Study of Unconfined Compression Strength on Cement Soil under Chemical Erosion[J].New Building Materials,2006(6):40-42.(in Chinese)
[10]CHEN Si-li,DONG Kai-he,YU Tao,et al.Experimental Study on Infiltration Time Effects of Mechanical Behaviors of Cement Soil[J].International Journal of Applied Mathematics and Statistics,2013,50(20):302-309.
[11]陈四利,史建军,于涛,等.冻融循环对水泥土力学特性的影响[J].应用基础与工程科学学报,2014,22(2):343-349.CHEN Si-li,SHI Jian-jun,YU Tao,et al.Influence of Freezing and Thawing Cycles on Mechanical Properties of Cemented Soil[J].Journal of Basic Science and Engineering Applications,2014,22(2):343-349.(in Chinese)
[12]杨雨林.污水对水泥土渗透性能影响的试验研究[D].沈阳:沈阳工业大学,2015.YANG Yu-lin.Experimental Study on Effect of Sewage Environment on Permeability of Cemented Soil[D].Shenyang:Shenyang University of Technology,2015.(in Chinese)
[13]袁伟.海水环境对水泥土渗透性和强度的影响及机理分析[D].青岛:中国海洋大学,2012.YUAN Wei.Effect of Seawater Condition on Permeability and Strength of Cement-treated Soil and Mechanism Analysis[D].Qingdao:Ocean University of China,2012.(in Chinese)
[14]杨俊杰,孙涛,张玥宸,等.腐蚀性场地形成的水泥土的劣化研究[J].岩土工程学报,2012(1):130-138.YANG Jun-jie,SUN Tao,ZHANG Yue-chen,et al.Deterioration of Soil Cement Stabilized in Corrosive Site[J].Chinese Journal of Geotechnical Engineering,2012(1):130-138.(in Chinese)
[15]魏星.腐蚀环境下水泥土的动力性能试验研究[D].沈阳:沈阳工业大学,2015.WEI Xing.Experimental Study on Dynamic Characteristics of Cemented Soil under the Corrosive Environment[D].Shenyang:Shenyang University of Technology,2015.(in Chinese)
[16]王金涛.循环荷载作用下水泥土桩复合地基的动力特性[D].北京:北京交通大学,2012.WANG Jin-tao.Dynamic Characteristics of Soil-Cement Pile Composite Foundation under Cyclic Loading[D].Beijing:Beijing Jiaotong University,2012.(in Chinese)
[17]张鹏,朱珍德,王军,等.不同掺剂对水泥土动力特性的影响[J].长江科学院院报,2014,31(5):62-67.ZHANG Peng,ZHU Zhen-de,WANG Jun,et al.Effect of Additives on Dynamic Properties of Cement-stabilized Soils[J].Journal of Yangtze River Scientific Research Institute,2014,31(5):62-67.(in Chinese)
[18]李庆冰.橡胶水泥土动力特性的试验研究[D].沈阳:沈阳建筑大学,2011.LI Qing-bing.Experimental Research on Dynamic Characteristics of Rubberized Cement-soil[D].Shenyang:Shenyang Jianzhu University,2011.(in Chinese)
[19]蔡袁强,梁旭,李坤.水泥土-土复合试样的动力特性[J].水利学报,2003(10):19-25.CAI Yuan-qiang,LIANG Xu,LI Kun.Dynamic Characteristics of Composite Sample of Cemented Clay-clay[J].Journal of Hydraulic Engineering,2003(10):19-25.(in Chinese)
[20]谭凡,饶锡保,黄斌,等.饱和尾矿粉土动力特性试验研究[J].地震工程学报,2015,37(3):772-777.TAN Fan,RAO Xi-bao,HUANG Bin,et al.Experimental Study or the Dynamic Characteristics of Tailings Silts[J].China Earthquake Engineering Journal,2015,37(3):772-777.(in Chinese)
[21]冷建,叶冠林,刘学增,等.循环荷载对上海软土动力特性影响规律的试验研究[J].地震工程学报,2015,38(4):1049-1052.LENG Jian,YE Guan-lin,LIU Xue-zeng,et al.Experimental Study on the Dynamic Characteristics of Shanghai Soft Clay Subjected to Cyclic Loading[J].China Earthquake Engineering Journal,2015,38(4):1049-1052.(in Chinese)