双绞合钢丝网加筋红层软岩土石混合料大型三轴试验研究
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摘要
为了研究加筋红砂岩土石混合料的力学特性,以双绞合六边形钢丝网为筋材,采用三轴不固结不排水剪切试验,研究了双绞合六边形钢丝网加筋红砂岩的应力应变关系以及随加筋层数、含水量、围压的变化规律,确定各种条件下泥质红砂岩填料体的强度参数c、φ值。试验结果表明,双绞合六边形钢丝网加筋红砂岩的抗剪强度随加筋层数的增加和加筋间距的减小而增加,抗剪强度的提高表现为c值的提高。在此基础上,建立了基于指数函数模型的加筋土弹性非线性本构方程式,指出了4个材料参数均可看作为加筋层数和含水量的函数。
With reinforced material of double-twisted hexagonal steel wire mesh,the unconsolidated-undrained and consolidated-undrained triaxial shear tests are conducted to analyze stress and strain relationship of reinforced the argillaceous red sandstone,variations of reinforced benefit coefficient IR with reinforced layers,water content and the variational rule of confining pressure to determine the strength parameters c,φ for the argillaceous red sandstone under various conditions.The results show that: sheer strength of reinforced the argillaceous red sandstone increases as the increase of number of reinforcement material and the decrease of the vertical layout reinforcement's interval value.Increase of sheer strength is manifested by the increase of.An elastic and nonlinearconstitutive equations of the reinforced earth has been constituted based on the model of exponent and function,and four material parameters have been put forward to be considered as the the function of the reinforced layers and water content.
With reinforced material of double-twisted hexagonal steel wire mesh,the unconsolidated-undrained and consolidated-undrained triaxial shear tests are conducted to analyze stress and strain relationship of reinforced the argillaceous red sandstone,variations of reinforced benefit coefficient IR with reinforced layers,water content and the variational rule of confining pressure to determine the strength parameters c,φ for the argillaceous red sandstone under various conditions.The results show that: sheer strength of reinforced the argillaceous red sandstone increases as the increase of number of reinforcement material and the decrease of the vertical layout reinforcement's interval value.Increase of sheer strength is manifested by the increase of.An elastic and nonlinearconstitutive equations of the reinforced earth has been constituted based on the model of exponent and function,and four material parameters have been put forward to be considered as the the function of the reinforced layers and water content.
引文
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[9]Bergado DT,Teerawattanasuk C,Wongsanon T,Vootti-preux P.Interaction between hexagonal wire mesh rein-forcement and silty sand backfill[J].Geotechnical TestingJournal,ASTM2001;24(1):23-38.
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[12]黄向京,王群,王维,等.双绞合六边形金属网加筋格宾挡墙地震动力特性试验研究[J].公路工程,2009,34(5):5-9.
[13]曾四平,凌建明,黄琴龙,等.考虑流固相互作用的加筋土路基力学行为研究[J].公路工程,2007,32(6):14-18.
[14]孙耀国,阚军.基于变形及地基影响的加筋土挡墙设计方法[J].公路工程,2009,34(3):79-82.
[15]彭勇登,陈全军,黄向京,等.钢网面板包裹式土工格栅加筋土挡墙的设计与应用研究[J].公路工程,2009,34(5):41-45.
[2]Marco Vicari,Francis Derache.2002.REINFORCED SOILSTRUCTURES WITH DOUBLE TWIST STEEL WIREMESH CASE HISTORY:THE FORMULE 1 MOTOR-DROME[Z].IMOLA,ITALY
[3]黄向京,王维,刘泽.双绞合钢丝网加筋格宾挡土墙设计方法研究[J].公路工程,2009,34(2):10-15.
[4]张剑锋,岳国生.红砂岩修筑浆砌石坝的岩土工程研究[J].上海地质,1989,30(2):1-6.
[5]赵明华,邓觐字,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):1-6.
[6]严秋荣,邓卫东.红层软岩土石混合料的长期蠕变性能模拟试验研究[J].重庆交通学院学报,2006,25(4):40-43.
[7]陈晓斌,张家生,封志鹏.红砂岩粗粒土流变工程特性试验研究[J].岩石力学与工程学报,2007,26(3):60l-607.
[8]喻泽红,魏红卫,邹银生.加筋红砂岩风化土强度和变形特性[J].岩石力学与工程学报,2005,24(15):2770-2779.
[9]Bergado DT,Teerawattanasuk C,Wongsanon T,Vootti-preux P.Interaction between hexagonal wire mesh rein-forcement and silty sand backfill[J].Geotechnical TestingJournal,ASTM2001;24(1):23-38.
[10]Indraratna B,Ionescu D,Christie HD.Shear behavior ofrailway ballast based on large-scale triaxial tests[J].Journal of Geotechnical and Geoenvironmental Engineer-ing,American Society of Civil Engineering,1998.124(5):439-449.
[11]杨果林,彭立,黄向京.加筋土结构分析理论与工程应用新技术[M].北京:中国铁道出版社,2007.
[12]黄向京,王群,王维,等.双绞合六边形金属网加筋格宾挡墙地震动力特性试验研究[J].公路工程,2009,34(5):5-9.
[13]曾四平,凌建明,黄琴龙,等.考虑流固相互作用的加筋土路基力学行为研究[J].公路工程,2007,32(6):14-18.
[14]孙耀国,阚军.基于变形及地基影响的加筋土挡墙设计方法[J].公路工程,2009,34(3):79-82.
[15]彭勇登,陈全军,黄向京,等.钢网面板包裹式土工格栅加筋土挡墙的设计与应用研究[J].公路工程,2009,34(5):41-45.
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