Results 41 to 50 of about 4,066 (144)
Shuitu Baochi Xuebao, 2005 利用室内模拟土柱试验研究了红壤积水入渗及土壤水分再分布规律。结果表明:入渗过程中湿润锋距离、累积入渗量与时间的平方根呈线性关系,湿润锋运移速率与时间呈乘幂关系,而入渗率与时间平方根的倒数呈线性关系;再分布过程中,在隔绝蒸发条件下,土壤含水量随土层深度的增加而下降,同一深度土层含水量则随时间推移而下降。无论在隔绝蒸发还是在自然蒸发条件下,短期内土壤水吸力有随土层深度的增加呈先下降后升高的趋势,而同一深度土层水吸力则随时间的推移而升高;土壤初始含水量对水分的入渗及再分布有较大影响,初始含水量较低时 ...
邹焱 陈洪松 苏以荣 邵明安
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Shuitu Baochi Xuebao, 2017 通过开展不同初始含水率天然冰碛土的冰川泥石流起动试验，近似模拟不同前期降雨量下融水冲刷冰碛物形成泥石流的起动过程。结果表明：(1)研究区冰川泥石流起动类型为坍塌推移型；(2)初始含水率较低时渗流作用表现明显，渗流侵蚀将大量细颗粒运移，致使粒间孔隙增大至原孔隙率的2倍，使土体骨架颗粒重新排列，颗粒间接触力降低，土体产生局部失稳变形，孔隙水压力呈“突降-突增-突降”趋势；(3)初始含水率较高时渗流与冲刷共同起主导作用，泥石流呈阵流爆发且与孔隙水压力峰值相对应；(4)含水率和孔隙水压力呈周期性变化 ...
潘, 魏学利
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Shuitu Baochi Xuebao, 2021 为揭示冻融循环作用对棕壤抗剪强度的影响，采集沈阳地区5 cm和25 cm 2个深度原状棕壤（分别为H5和H25）为研究对象，通过室内冻融循环模拟和土壤直剪试验，研究冻融循环次数和土壤含水率对土壤抗剪强度的影响。结果表明：（1）土样含水率越高，初次冻融作用的破坏效果越强，1次冻融循环后，含水率为25%的H5和H25土样黏聚力分别下降50.00%和25.87%；含水率35%的H5和H25土样黏聚力分别下降75.61%和50.77%。15次冻融循环后，含水率10%的H5和H25土样黏聚力分别增加74.36 ...
朱龙祥 +5 more
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, 2012 非饱和残积土是厦门地区诸多填方工程的工程用土,而岩土工程的强度与稳定性问题都涉及到非饱和土的抗剪强度及其指标.采用滤纸法测定非饱和残积土的基质吸力,通过一系列的直接剪切试验,测定不同初始含水量状态下土的抗剪强度及其强度指标.试验结果表明:基质吸力随着含水量、体积含水量或饱和度的增加而减小.当含水量小于16%,体积含水量大于35%或者饱和度大于70%时,基质吸力对含水量的变化非常敏感.在低基质吸力区,抗剪强度随着基质吸力的增加显著增加,表观粘聚力随基质吸力的增大而线性增加;在高基质吸力区 ...
倪健 +4 more
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Study of quality changes in high moisture wheat after hot air drying [PDF]
Objective: To study the effects of different drying processes on the quality of high moisture wheat. Methods: Investigates the changes of wheat quality under different drying processes in three dimensions: appearance quality, nutritional quality and ...
CHEN Pengxiao +7 more
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Thermodynamic model for predicting mineral phase distribution in cement-stabilized kaolinite [PDF]
In this study, a new method based on a chemical thermodynamic model is proposed to quantitatively predict the phase distribution in cemented soil. Commercial kaolinite with simple phase composition is selected, and a series of cemented kaolinite samples ...
GE Jinyu1, 2 , XU Fei1 , HAN Xun1, HAN Xuesong1, QIAN Wenxun1, LI Huaisen1
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New mixed boundary true triaxial loading device for testing study on 3-D stress-strain-strength behaviour of geomaterials [PDF]
, 2014 2009-2010 > Academic research: refereed > Publication in refereed journalVersion of ...
Cheng, CM +3 more
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Shuitu Baochi Xuebao, 2016 为了研究崩岗侵蚀土壤的水分运动特征，采集湖北通城县花岗岩崩岗区的红壤，研究优先流及影响因子。把采集的1种红土层和3种砂土层按照野外“上红下砂”层次顺序，分别装填到长60 cm，宽11 cm，高110 cm的透明PVC土箱。3个土箱在不同初始含水量（12.2%～23.6%）和雨强（0.7，1.2 mm/min）下进行模拟降雨入渗，用时域反射仪（TDR）高频监测土体20个部位含水量瞬时动态，根据含水量的时空变化识别土体优先流发生特征。结果表明，降水入渗多表现为非均匀入渗，土壤饱和导水率较大 ...
段晓倩, 倪 晨, 陈 姣, 陈家宙
doaj
Predicting Multi-Scenario Land Use Changes and Soil Erosion in the Huaihe River Basin Based on Coupled PLUS-CSLE Model [PDF]
[Objective] Understanding the future temporal and spatial evolution of land use and soil erosion in the Huaihe River Basin is of significant importance for rational and coordinated use of land resources, formulating future soil and water conservation ...
CHEN Lei +8 more
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Research on development and application of test equipment for measuring soil erosion characteristics [PDF]
The soil erosion characteristics mainly include two indexes: critical shear stress for incipient motion of soil and soil erosion rate, which are controlling factors of breach flow and breach morphology evolution during embankment dam breaching ...
LU Hongning1 , ZHONG Qiming1, 2, 3 , SHAN Yibo1, YANG Meng1, HU Liang4
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