溜砂坡抗剪强度参数估算模型实验研究
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摘要
为揭示溜砂坡抗剪强度参数与其控制因素间的内在联系,配制五种不同级配样品,计算五组样品的浑圆度、细颗粒含量、不均匀系数和曲率系数。分析控制因素对溜砂坡抗剪强度参数的影响:黏聚力和内摩擦角分别与不均匀系数、曲率系数呈正比关系;黏聚力和内摩擦角均随颗粒的浑圆度的增大而增加;黏聚力和内摩擦角均随细颗粒含量的增大而减少。并绘制出关系曲线,刻画控制因素与抗剪参数间的内在规律性。最后通过多元线性回归理论,构建出简洁、快速的溜砂坡抗剪强度参数估算模型,并通过野外取样,验证了此估算模型的准确性。
In order to reveal the internal relationship between the shearing strength parameters and their control factors, this paper carried an experiment which focused on the flowing factors of shear strength: non-uniform degree, curvature coefficient, round degrees and fine particle content, experimental results indicate that those factors have great effects on shear strength. The cohesion and internal friction have positive relative with non-uniform degree and curvature coefficient. The cohesion and internal friction increase with round degrees. Along with the increase of fine particle content, the cohesion and internal friction are reducing. The relation curve was acquired based on the results, and the inherent law between the control factor and the shearing parameters was determined. Finally, linear fitting is conducted for the four factors. The obtained formula can be applied to the estimation of the cohesion and internal friction of sliding sand slope.
In order to reveal the internal relationship between the shearing strength parameters and their control factors, this paper carried an experiment which focused on the flowing factors of shear strength: non-uniform degree, curvature coefficient, round degrees and fine particle content, experimental results indicate that those factors have great effects on shear strength. The cohesion and internal friction have positive relative with non-uniform degree and curvature coefficient. The cohesion and internal friction increase with round degrees. Along with the increase of fine particle content, the cohesion and internal friction are reducing. The relation curve was acquired based on the results, and the inherent law between the control factor and the shearing parameters was determined. Finally, linear fitting is conducted for the four factors. The obtained formula can be applied to the estimation of the cohesion and internal friction of sliding sand slope.
引文
[1] 卜祥航,傅荣华,李宁,等.散粒体斜坡注浆固坡工程防治技术试验研究[J].工程地质学报,2015,23(3):415-419.
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[5] 王成华,阙云,徐骏,等.粒状碎屑溜砂坡运动方程与砂坡土压力计算[J].岩土力学,2007,28(7):1299-1303.
[6] 梁光模,王成华,张小刚.川藏公路中坝段溜砂坡形成与防治对策[J].中国地质灾害与防治学报,2003,14(4):33-38.
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[8] 何越磊,姚令侃,苏风环,等.沙堆模型动力学特性与灾害系统演化预测研究[J].自然灾害学报,2005,15(4):44-50.
[9] 王成华,阙云,李新坡,等.粒状碎屑溜砂坡运动特征与动力数值分析[J].岩土力学,2007,28(2):219-223.
[10] 吴国雄,曾榕彬,王成华.溜砂坡的形成诱发因素及失稳破坏条件[J].中国铁道科学,2006,27(5):7-12.
[11] 卜祥航,傅荣华,李仅德,等.散粒体斜坡失稳破坏内部因素试验研究[J].长江科学院院报,2016,33(9):116-120.
[12] 慕焕东,邓亚虹,李荣建,等.砂粒含量对砂质黄土力学性质影响试验研究[J].水利与建筑工程学报,2018,16(6):36-39.
[13] 凌华,傅华,韩华强,等.颗粒破碎对堆石料静动力特性影响的试验研究[J].水利与建筑工程学报,2010,8(4):44-47.
[14] 徐建华.地理系统分析[M].兰州:兰州大学出版社,1991.
[15] 尚彦军,杨志法,廖秋林,等.雅鲁藏布江大拐弯北段地质灾害分布规律及防治对策[J].中国地质灾害与防治学报,2001,12(4):34-35.
[2] Blong R J.A numerical classification of selected landslides of debris slide-avalanche-flow type[J].Engineering Geology,1973,7(2):99-114.
[3] Gabriel D.The effect of slope length on the amount and size distribution of eroded silt loam:short slope laboratory experiments on interrill erosion[J].Geomorphology,1999,28:169-172.
[4] Bretz M,Cunningham J B,Kurczvnslci Pletal,et al.Imaging of avalanches in granular materials[J].Physical Review Letters,1992,69(16):2431-2434.
[5] 王成华,阙云,徐骏,等.粒状碎屑溜砂坡运动方程与砂坡土压力计算[J].岩土力学,2007,28(7):1299-1303.
[6] 梁光模,王成华,张小刚.川藏公路中坝段溜砂坡形成与防治对策[J].中国地质灾害与防治学报,2003,14(4):33-38.
[7] 蒋良潍,姚令侃,李仕雄.非均匀散粒体自组织临界性机制初探[J].岩石力学与工程学报,2004,23(18):3178-3184.
[8] 何越磊,姚令侃,苏风环,等.沙堆模型动力学特性与灾害系统演化预测研究[J].自然灾害学报,2005,15(4):44-50.
[9] 王成华,阙云,李新坡,等.粒状碎屑溜砂坡运动特征与动力数值分析[J].岩土力学,2007,28(2):219-223.
[10] 吴国雄,曾榕彬,王成华.溜砂坡的形成诱发因素及失稳破坏条件[J].中国铁道科学,2006,27(5):7-12.
[11] 卜祥航,傅荣华,李仅德,等.散粒体斜坡失稳破坏内部因素试验研究[J].长江科学院院报,2016,33(9):116-120.
[12] 慕焕东,邓亚虹,李荣建,等.砂粒含量对砂质黄土力学性质影响试验研究[J].水利与建筑工程学报,2018,16(6):36-39.
[13] 凌华,傅华,韩华强,等.颗粒破碎对堆石料静动力特性影响的试验研究[J].水利与建筑工程学报,2010,8(4):44-47.
[14] 徐建华.地理系统分析[M].兰州:兰州大学出版社,1991.
[15] 尚彦军,杨志法,廖秋林,等.雅鲁藏布江大拐弯北段地质灾害分布规律及防治对策[J].中国地质灾害与防治学报,2001,12(4):34-35.