紫色土和黄壤草本根土复合体抗剪性能试验研究
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摘要
以重庆常见的紫色土和黄壤草本根土复合体为试验对象,研究含水率和含根量对土壤抗剪强度的影响,结果表明:①在试验含根量范围内,根系提高了土样抗剪强度,黏聚力和内摩擦角随含根量的增加而增大,但存在最优含根量区域,黄壤最优含根量为1%,紫色土最优含根量为0.6%;②在试验含水率范围内,黏聚力和内摩擦角受含水率影响显著(P<0.05),且随含水率的增加表现为先增加后减少,存在最优含水率,黄壤最优含水率为20%,紫色土最优含水率为25%;③在试验含水率范围内,含根量对紫色土黏聚力和内摩擦角的影响比黄壤大。
Taking the common root-soil complex of yellow soil and purple soil of Chongqing City as the subject of test,the paper studied the influence of water content and root content to the shear strength of soil. The outcomes show that a) within the range of root content of the test,the root system has increased the shear strength of soil samples. The inner friction angle and cohesive strength are increased along with the increase of root content,but there is an optimal root content region. The optimal root content of yellow soil is 1% and 0.6% for purple soil; b)within the range of moisture content of the test,the inner friction angle and cohesive strength are remarkably affected by moisture content( P<0.05) and that are increased first then decreased along with the increase of moisture content. There is an optimal moisture content. The optimal moisture content of yellow soil is 20% and purple soil is 25% and; c) within the range of moisture content of the test,the influence of root content is greater to the inner friction angle and cohesive strength of purple soil than that of yellow soil.
Taking the common root-soil complex of yellow soil and purple soil of Chongqing City as the subject of test,the paper studied the influence of water content and root content to the shear strength of soil. The outcomes show that a) within the range of root content of the test,the root system has increased the shear strength of soil samples. The inner friction angle and cohesive strength are increased along with the increase of root content,but there is an optimal root content region. The optimal root content of yellow soil is 1% and 0.6% for purple soil; b)within the range of moisture content of the test,the inner friction angle and cohesive strength are remarkably affected by moisture content( P<0.05) and that are increased first then decreased along with the increase of moisture content. There is an optimal moisture content. The optimal moisture content of yellow soil is 20% and purple soil is 25% and; c) within the range of moisture content of the test,the influence of root content is greater to the inner friction angle and cohesive strength of purple soil than that of yellow soil.
引文
[1] 陈兰云.土力学及地基基础[M].第2版.北京:机械工业出版社,2007:48-52.
[2] 申春妮,方祥位,王和文,等.吸力、含水率和干密度对重塑非饱和土抗剪强度影响研究[J].岩土力学,2009,30(5):1347-1351.
[3] 雷洁,张国明,刘连友,等.土壤抗剪强度测定与影响因素研究进展[J].北京师范大学学报(自然科学版),2016,52(4):486-492.
[4] 蒋必凤,李淑敏,肖元平.牛筋草根土复合体抗剪性能研究[J].山西建筑,2016,42(35):63-65.
[5] 胡文利,李为萍,陈军.不同含水率水平下根-土复合体抗剪强度试验研究[J].内蒙古农业大学学报(自然科学版),2011,32(1):215-219.
[6] 王云琦,王玉杰,张洪江,等.重庆缙云山不同土地利用类型土壤结构对土壤抗剪性能的影响[J].农业工程学报,2006,22(3):40-45.
[7] 格日乐,张成福,蒙仲举,等.3种植物根-土复合体抗剪特性对比分析[J].水土保持学报,2014,28(2):85-90.
[8] 韦杰,史炳林,李进林.紫色土坡耕地埂坎土壤抗剪性能对含水率的响应[J].农业工程学报,2016,32(20):153-160.
[9] 杨永红,刘淑珍,王成华,等.含根量与土壤抗剪强度增加值关系的试验研究[J].水土保持研究,2007,14(3):287-288,291.
[2] 申春妮,方祥位,王和文,等.吸力、含水率和干密度对重塑非饱和土抗剪强度影响研究[J].岩土力学,2009,30(5):1347-1351.
[3] 雷洁,张国明,刘连友,等.土壤抗剪强度测定与影响因素研究进展[J].北京师范大学学报(自然科学版),2016,52(4):486-492.
[4] 蒋必凤,李淑敏,肖元平.牛筋草根土复合体抗剪性能研究[J].山西建筑,2016,42(35):63-65.
[5] 胡文利,李为萍,陈军.不同含水率水平下根-土复合体抗剪强度试验研究[J].内蒙古农业大学学报(自然科学版),2011,32(1):215-219.
[6] 王云琦,王玉杰,张洪江,等.重庆缙云山不同土地利用类型土壤结构对土壤抗剪性能的影响[J].农业工程学报,2006,22(3):40-45.
[7] 格日乐,张成福,蒙仲举,等.3种植物根-土复合体抗剪特性对比分析[J].水土保持学报,2014,28(2):85-90.
[8] 韦杰,史炳林,李进林.紫色土坡耕地埂坎土壤抗剪性能对含水率的响应[J].农业工程学报,2016,32(20):153-160.
[9] 杨永红,刘淑珍,王成华,等.含根量与土壤抗剪强度增加值关系的试验研究[J].水土保持研究,2007,14(3):287-288,291.