砂黏土变形与强度特性的大型三轴试验研究
|
摘要
通过大型三轴试验,对不同压实度及不同加筋条件下砂黏土的应力应变特性、抗剪强度进行了对比分析,探讨了试验现象的内在机理。结果表明,高压实度低围压下应力应变关系呈微软化型,低密实度及高围压下呈硬化型,黏聚力随压实度的提高呈指数增长,内摩擦角变化不明显;加筋机理符合"准黏聚力理论"。
The stress-strain relationship and strength of sandy clay under different degree of compaction and reinforcement are analyzed detailedly.At the same time,the inherent mechanism of experimental phenomena is discussed.Test results indicate that under high compaction degree and low confining pressures sandy clay are characterized by strain softening,while under high confining pressures or low compaction degree they exhibit strain hardening,cohesion grows at an exponential rate along with the increase of compaction degree,internal friction angle does not change significantly.The reinforcing mechanism of the reinforced soil mixture is in compliance with the "quasi cohesive force" theory.
The stress-strain relationship and strength of sandy clay under different degree of compaction and reinforcement are analyzed detailedly.At the same time,the inherent mechanism of experimental phenomena is discussed.Test results indicate that under high compaction degree and low confining pressures sandy clay are characterized by strain softening,while under high confining pressures or low compaction degree they exhibit strain hardening,cohesion grows at an exponential rate along with the increase of compaction degree,internal friction angle does not change significantly.The reinforcing mechanism of the reinforced soil mixture is in compliance with the "quasi cohesive force" theory.
引文
[1]刘萌成,高玉峰,刘汉龙,等.堆石料变形与强度特性的大型三轴试验研究[J].岩石力学与工程学报,2003,22(7):1104-1111.LIU Meng-cheng,GAO Yu-feng,LIU Han-long,et al.Large-scale triaxial test study on deformation andstrength characteristics of rockfill materials[J].ChineseJournal of Rock Mechanics and Engineering,2003,22(7):1104-1111.
[2]秦红玉,刘汉龙,高玉峰.粗粒料强度和变形的大型三轴试验研究[J].岩土力学,2004,25(10):1575-1580.QIN Hong-yu,LIU Han-long,GAO,Yu-feng,et al.Re-search on strength and deformation behavior of coarse ag-gregates based on large-scale triaxial tests[J].Rock andSoil Mechanics,2004,25(10):1575-1580.
[3]雷胜友.加筋黄土的三轴试验研究[J].西安公路交通大学学报,2000,20(2):1-5.LEI Sheng-you.Study on reinforced loess by triaxial tests[J].Journal of Xi’an Highway University,2000,20(2):1-5.
[4]黄英,保华富.加筋碎石土的抗剪强度特性研究[J].大坝观测与土工测试,2000,24(5):44-47.HUANG Ying,BAO Hua-hu.Research of shear strengthcharacteristics of reinforced gallet[J].Dam Observationand Geotechnical Tests,2000,24(5):44-47.
[5]姜燕玲,宋修广.粉砂土及其加筋土大三轴剪切试验及结果分析[J].山东大学学报:工学版,2004,34(2):76-79.JIANG Yan-ling,SONG Xiu-guang.On soil and polymergeogrid reinforced soil by large-scale triaxial[J].Jour-nal of Shandong University:Engineering Science,2004,34(2):76-79.
[6]蒋鑫,凌建明,谭炜,等.高速公路填砂路基边坡稳定性分析[J].铁道工程学报,2008,(9):1-6.JANG Xin,LING Jian-min,TAN Wei,et al.Slope sta-bility analysis of sand embankment for expressway engi-neering[J].Journal of Railway Engineering Society,2008,(9):1-6.
[7]李建国,褚宇光,杜玉柱.汶川地震铁路路基工程震害调查与分析[C]//地震灾害对铁路的影响及对策学术研讨会论文集.北京:科学出版社,2008:91-95.LI Jian-guo,CHUYu-guang,DUYu-zhu.Investigation andAnalysis of Earthquake Damage Railway Subgrade Engi-neering in Wenchuan Earthquake[C]//Symposium onEarthquake Disater Impacts on Railway and Countermeas-ures.Beijing:Science Press,2008:91-95.
[8]甘善杰,刘永平,彭炳芬.公路路基工程震害调查及对现行抗震设计规范的思考[C]//地震灾害对铁路的影响及对策学术研讨会论文集.北京:科学出版社,2008:96-102.GAN Shan-jie,LIU Yong-ping,PENG Bing-fen.Investiga-tion of Earthquake Damage for Highway Subgrade andThought on Current Earthquake-resistant Design Specifi-cation[C]//Symposium on Earthquake Disater Impactson Railway and Countermeasures.Beijing:Science Press,2008:96-102.
[9]郁寿松,石兆吉.土壤震陷试验研究[J].岩土工程学报,1989,20(4):35-44.YU Shou-song,SHI Zhao-ji.Experimental study on char-acteristics of seismic settlement of soil[J].Chinese Jour-nal of Geotechnical Engineering,1989,20(4):35-44.
[10]P W Rowe.The Stress-Dilatancy Relations for Static E-quilibrium of an Assembly of Particles in Contact[C]//Proceedings of Royal Society of London,Series A,1962,269:500-527.
[2]秦红玉,刘汉龙,高玉峰.粗粒料强度和变形的大型三轴试验研究[J].岩土力学,2004,25(10):1575-1580.QIN Hong-yu,LIU Han-long,GAO,Yu-feng,et al.Re-search on strength and deformation behavior of coarse ag-gregates based on large-scale triaxial tests[J].Rock andSoil Mechanics,2004,25(10):1575-1580.
[3]雷胜友.加筋黄土的三轴试验研究[J].西安公路交通大学学报,2000,20(2):1-5.LEI Sheng-you.Study on reinforced loess by triaxial tests[J].Journal of Xi’an Highway University,2000,20(2):1-5.
[4]黄英,保华富.加筋碎石土的抗剪强度特性研究[J].大坝观测与土工测试,2000,24(5):44-47.HUANG Ying,BAO Hua-hu.Research of shear strengthcharacteristics of reinforced gallet[J].Dam Observationand Geotechnical Tests,2000,24(5):44-47.
[5]姜燕玲,宋修广.粉砂土及其加筋土大三轴剪切试验及结果分析[J].山东大学学报:工学版,2004,34(2):76-79.JIANG Yan-ling,SONG Xiu-guang.On soil and polymergeogrid reinforced soil by large-scale triaxial[J].Jour-nal of Shandong University:Engineering Science,2004,34(2):76-79.
[6]蒋鑫,凌建明,谭炜,等.高速公路填砂路基边坡稳定性分析[J].铁道工程学报,2008,(9):1-6.JANG Xin,LING Jian-min,TAN Wei,et al.Slope sta-bility analysis of sand embankment for expressway engi-neering[J].Journal of Railway Engineering Society,2008,(9):1-6.
[7]李建国,褚宇光,杜玉柱.汶川地震铁路路基工程震害调查与分析[C]//地震灾害对铁路的影响及对策学术研讨会论文集.北京:科学出版社,2008:91-95.LI Jian-guo,CHUYu-guang,DUYu-zhu.Investigation andAnalysis of Earthquake Damage Railway Subgrade Engi-neering in Wenchuan Earthquake[C]//Symposium onEarthquake Disater Impacts on Railway and Countermeas-ures.Beijing:Science Press,2008:91-95.
[8]甘善杰,刘永平,彭炳芬.公路路基工程震害调查及对现行抗震设计规范的思考[C]//地震灾害对铁路的影响及对策学术研讨会论文集.北京:科学出版社,2008:96-102.GAN Shan-jie,LIU Yong-ping,PENG Bing-fen.Investiga-tion of Earthquake Damage for Highway Subgrade andThought on Current Earthquake-resistant Design Specifi-cation[C]//Symposium on Earthquake Disater Impactson Railway and Countermeasures.Beijing:Science Press,2008:96-102.
[9]郁寿松,石兆吉.土壤震陷试验研究[J].岩土工程学报,1989,20(4):35-44.YU Shou-song,SHI Zhao-ji.Experimental study on char-acteristics of seismic settlement of soil[J].Chinese Jour-nal of Geotechnical Engineering,1989,20(4):35-44.
[10]P W Rowe.The Stress-Dilatancy Relations for Static E-quilibrium of an Assembly of Particles in Contact[C]//Proceedings of Royal Society of London,Series A,1962,269:500-527.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心