本构因子及环境因子水对土壤粘聚力的影响分析
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摘要
为研究土壤本构因子和环境因子水对粘聚力的影响,结合不同土壤(河沙、高岭土、红壤、重钙土)颗粒粒径组成分析测定及不同颗粒集群的宏观力剪切试验,通过回归分析的方法寻找影响土壤粘聚力的关键本构因子及影响权重,研究不同含水率下土壤粘聚力和内摩擦角变化。结果表明,小于0. 01mm的颗粒对4种土壤的粘聚力影响最大(占比98%以上),其中粗粘粒是影响粘聚力的关键因子;河沙、高岭土和红壤的粘聚力和内摩擦角均随着土壤含水率的增加呈先增后减趋势,但水对粘聚力的作用与本构因子密切相关,含细颗粒更多的土壤粘聚力对含水率变化的响应可能更加敏感。初步探讨了本构因子和含水率对土壤粘聚力的影响,为土壤侵蚀的防治、防止土壤分离、土壤结构加固、土壤结构稳定及土壤生态服务功能的发挥提供理论指导和实践指导。
In order to study the influence of soil constitutive factor and environmental factor water on soil cohesion,the particle size composition of different soil( sand,kaolin,red soil,heavy calcium soil) and the shear test of macro force in different soil particles cluster are combined to find the influence of soil cohesion by regression analysis. The key constitutive factors and their influence weights are studied,and the soil cohesion and internal friction angle of soil under different moisture content are studied. The results show that the soil particles less than 0. 01 mm have the greatest impact on the cohesion of sand,kaolin,red soil and heavy calcium soil. The coarse clay is the key factor affecting the cohesion of the four kinds of soil,and the cohesion and internal friction angle of the sand,kaolin and red soil increase and then decrease with the increase of soil moisture content. The effect of water on cohesion is closely related to the constitutive factor,and the cohesion of soil with more fine particles may be more sensitive to the response of water content change. The response of soil cohesion to the constitutive factor and water content was preliminarily discussed in order to prevent soil erosion,soil separation,soil structure reinforcement,and soil structure stability,and guide the theory and practice of soil ecological service function.
In order to study the influence of soil constitutive factor and environmental factor water on soil cohesion,the particle size composition of different soil( sand,kaolin,red soil,heavy calcium soil) and the shear test of macro force in different soil particles cluster are combined to find the influence of soil cohesion by regression analysis. The key constitutive factors and their influence weights are studied,and the soil cohesion and internal friction angle of soil under different moisture content are studied. The results show that the soil particles less than 0. 01 mm have the greatest impact on the cohesion of sand,kaolin,red soil and heavy calcium soil. The coarse clay is the key factor affecting the cohesion of the four kinds of soil,and the cohesion and internal friction angle of the sand,kaolin and red soil increase and then decrease with the increase of soil moisture content. The effect of water on cohesion is closely related to the constitutive factor,and the cohesion of soil with more fine particles may be more sensitive to the response of water content change. The response of soil cohesion to the constitutive factor and water content was preliminarily discussed in order to prevent soil erosion,soil separation,soil structure reinforcement,and soil structure stability,and guide the theory and practice of soil ecological service function.
引文
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[14]张光辉.对坡面径流挟沙力研究的几点认识[J].水科学进展,2018,29(2):151-158.
[15]张宇山.多元线性回归分析的实例研究[J].科技信息,2009(9):54-56.
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[21]程洪,赵建民,颜涛,等.非饱和沙粒植草后抗剪强度与粘聚力增强试验研究[J].南昌工程学院学报,2017,36(6):31-36.
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[23]廖红建,李涛,彭建兵.高陡边坡滑坡体黄土的强度特性研究[J].岩土力学,2011,32(7):1939-1944.
[24]倪九派,袁天泽,高明,等.土壤干密度和含水率对2种紫色土抗剪强度的影响[J].水土保持学报,2012,26(3):72-77.
[25]王丽,梁鸿.含水率对粉质粘土抗剪强度的影响研究[J].内蒙古农业大学学报:自然科学版,2009,30(1):170-174.
[26]王中文,洪宝宁,刘鑫,等.红粘土抗剪强度的水敏性研究[J].工程科学与技术,2011,43(1):17-22.
[27]沈细中,管新建,兰雁.非饱和黏土有效应力强度指标计算[J].岩土力学,2007(s1):207-210.
[28]钟茫.非饱和紫色土抗剪强度影响因素研究[D].重庆:西南大学,2014.
[29]王玉锁,陈炜韬,王明年.砂土质隧道围岩粘聚力影响因素的试验研究[J].水文地质工程地质,2006,33(6):48-51.
[2]王光谦,熊刚,方红卫.颗粒流动的一般本构关系[J].中国科学:技术科学,1998(3):282-288.
[3]潘网生,胡向红,卢玉东,等.黄土孔隙、裂隙及其优先流研究进展[J].科学技术与工程,2018,18(08):163-169.
[4]潘蕾,张远芳,陈敬知,等.湿陷系数与黄土宏观结构的关系研究[J].水资源与水工程学报,2018,29(03):220-224.
[5]刘向君,刘锟,苟绍华,等.钠蒙脱土晶层间距膨胀影响因素研究[J].岩土工程学报,2013,35(12):2342-2345.
[6]卢肇钧,张惠明,陈建华,等.非饱和土的抗剪强度与膨胀压力[J].岩土工程学报,1992,14(3):1-8.
[7]卢肇钧.粘性土抗剪强度研究的现状与展望[J].土木工程学报,1999,32(4):3-9.
[8]唐泽军,雷廷武,张晴雯,等.确定侵蚀细沟土壤临界抗剪应力的REE示踪方法[J].土壤学报,2004,41(1):28-34.
[9]肖培青,姚文艺,王国庆,等.植被作用下土壤抗剪强度和径流侵蚀力的耦合效应[J].水科学进展,2016,27(2):224-230.
[10]柯家明,李绍进,夏艳华.黄土抗剪强度在水蚀中表现形式的研究[J].特种结构,2005,22(2):53-55.
[11]郑粉莉,高学田.坡面汇流汇沙与侵蚀-搬运-沉积过程[J].土壤学报,2004,41(1):134-139.
[12]吴普特,周佩华.坡面薄层水流流动型态与侵蚀搬运方式的研究[J].水土保持学报,1992(01):19-24+39.
[13]张光辉.坡面薄层流水动力学特性的实验研究[J].水科学进展,2002,13(2):159-165.
[14]张光辉.对坡面径流挟沙力研究的几点认识[J].水科学进展,2018,29(2):151-158.
[15]张宇山.多元线性回归分析的实例研究[J].科技信息,2009(9):54-56.
[16]伍岳峰.土颗粒粒径分维值与土的粘聚力的关系[J].湖南水利水电,2007(2):23-24.
[17]栗岳洲,付江涛,胡夏嵩,等.土体粒径对盐生植物根-土复合体抗剪强度影响的试验研究[J].岩石力学与工程学报,2016,35(2):403-412.
[18]李胜梅,程步奇,高兴誉,等.主成分线性回归模型分析应用程序性能[J].计算机研究与发展,2009,46(11):1949-1955.
[19]江浩浩,董希斌,王海飙.边坡土壤含水率对不同植被土壤抗剪强度的影响[J].森林工程,2009,25(3):77-80.
[20]张平,殷洪建,吴昊.非饱和土砂土湿吸力[J].辽宁工程技术大学学报:自然科学版,2011,30(3):389-391.
[21]程洪,赵建民,颜涛,等.非饱和沙粒植草后抗剪强度与粘聚力增强试验研究[J].南昌工程学院学报,2017,36(6):31-36.
[22]陈红星,李法虎,郝仕玲,等.土壤含水率与土壤碱度对土壤抗剪强度的影响[J].农业工程学报,2007,23(2):21-25.
[23]廖红建,李涛,彭建兵.高陡边坡滑坡体黄土的强度特性研究[J].岩土力学,2011,32(7):1939-1944.
[24]倪九派,袁天泽,高明,等.土壤干密度和含水率对2种紫色土抗剪强度的影响[J].水土保持学报,2012,26(3):72-77.
[25]王丽,梁鸿.含水率对粉质粘土抗剪强度的影响研究[J].内蒙古农业大学学报:自然科学版,2009,30(1):170-174.
[26]王中文,洪宝宁,刘鑫,等.红粘土抗剪强度的水敏性研究[J].工程科学与技术,2011,43(1):17-22.
[27]沈细中,管新建,兰雁.非饱和黏土有效应力强度指标计算[J].岩土力学,2007(s1):207-210.
[28]钟茫.非饱和紫色土抗剪强度影响因素研究[D].重庆:西南大学,2014.
[29]王玉锁,陈炜韬,王明年.砂土质隧道围岩粘聚力影响因素的试验研究[J].水文地质工程地质,2006,33(6):48-51.