Results 41 to 50 of about 2,463 (148)
Correlation between soil-water characteristic curve and collapsibility in undisturbed loess [PDF]
This study investigates the correlation between the soil-water characteristic curve (SWCC) of undisturbed loess and its collapsibility. Undisturbed loess soil samples, obtained from depths up to 30 meters below the surface in Chang’an District, Xi’an ...
Haiman WANG +3 more
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Macro-micro Evolution Characteristic Function of Solidified Loess under the Effects of Dry-wet Cycles [PDF]
[Objective] To reveal the durability of solidified loess slope protection in long-term service. [Methods] Under the condition of dry-wet cycles, direct shear, permeability mechanical tests of solidified loess were carried out to study the evolution law ...
CHANG Zhou +6 more
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Dizhen xuebao, 2020 本文基于Biot动力固结理论和弹性动力学理论，考虑海床（土壤）的两相性、黏弹性人工边界及流（水）-固耦合作用，建立了隧道-土-流体相互作用的力学模型，讨论了P波作用下有无水的情况以及水深、水域隧道埋深、海床土性质和地震波入射角等因素对隧道及其周围海床应力的影响。结果表明：隧道周围海床土的孔隙水压力和隧道内应力随着水深的增加而增加；地震波特性和海床土特性对隧道的内应力和海床土的孔隙水压力均有较大的影响；海床土的渗透性和隧道埋深对隧道的内应力影响较小，而对隧道周围海床土的孔隙水压力影响较大 ...
Zhiyong Ouyang +4 more
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Experiment and modeling of soil-water characteristic curve of unsaturated residual soil [PDF]
, 2014 土-水特征曲线是指基质吸力与含水率或饱和度的关系曲线。土-水特征及其相关数学模型可用于非饱和土性质如渗透系数和抗剪强度模型的建立。通常,土-水特征曲线仅有脱湿曲线。笔者详细讨论了初始含水率、干密度、竖向应力及干湿循环对脱湿曲线的影响。采用滤纸法测试了厦门地区残积土的土-水特征曲线(SWCC)及滞回环。结果表明,初始含水率对SWCC影响较小,最优含水率干侧试样SWCC的进气值小,滞回环小;湿侧试样的进气值大,滞回环大;最优含水率试样的滞回环居中。初始干密度对SWCC有显著影响,低干密度试样SWCC进气值小,
陈东霞, 龚晓南
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Dianci bileiqi, 2019 高压断路器灭弧室瓷套断裂事故会严重影响电网供电的安全可靠性,针对瓷套断裂事故易发生在冬季低温环境的问题,建立了灭弧室瓷套的电-热-结构多场耦合有限元模型,对不同低温环境下瓷套的应力分布情况进行了计算分析,并研究了最大拉应力随环境温度变化的规律。根据结冰过程中质量守恒的特征,推导了瓷套胶装区域孔隙结冰膨胀的数学模型,计算分析了孔隙结冰膨胀下瓷套的应力分布情况及不同孔隙尺寸结冰膨胀下的最大拉应力变化规律,结果表明:最大拉应力的分布位置会变为结冰孔隙所在的位置,且随着孔隙半径的增大 ...
陈国平, 张峰, 张俊娜, 张宏明
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Preparation of high-density iron soft magnetic materials by HVC technology [PDF]
, 2016 High density green compacts of annealed iron powder with a density of 7.70 g·cm-3 were prepared by high velocity compaction(HVC) combined with powder annealing.
DONG Guo-qiang +5 more
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, 2010 深海表层海泥车辆地面力学特性是开发大洋矿产资源-多金属结核采矿车的理论基础。该文深入研究深海表层海泥样品和陆地二种膨润土的物理性质,确定深海表层模拟海泥的原料,分析深海表层海泥和模拟海泥的物理力学参数,配制出具有极高含水量、极小内摩擦角、高液限、高塑性、大孔隙比、低强度和低重度等深海表层海泥特性的模拟海泥,根据车辆地面力学理论,开展多种平板在垂直方向上的海泥载荷-沉陷实验和不同节距、不同齿高、不同齿形和不同齿宽的履带齿板在水平力作用下的海泥剪切应力-位移实验,深入分析实验数据 ...
李力, 李庶林
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Distribution characteristic and formation process of bubbles in foaming slag in a converter [PDF]
, 2016 Foaming slags at the top at the beginning of deslaggging, in the lower portion at the end of deslagging, and at the bottom after deslagging were taken with a sample scoop at the end of dephosphorization in the converter slag-remaining and double-slag ...
BAO Yan-ping, LI Xiang, LIN Lu, WANG Min
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Experimental study on optimizing ratio of EICP solution to reinforce red mudstone filler based on response surface method [PDF]
In order to explore the effects and mechanisms of the urease-induced calcium carbonate precipitation (EICP) technology on the solidification of red mudstone fillers, urease is extracted from soybean, and the ratio of EICP solution is optimized by the ...
YU Yunyan, GUO Qiuyue, CUI Wenhao, DING Xiaogang, DU Qianzhong, QI Guobin
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Shuitu Baochi Xuebao, 2022 为分析不同梯度盐渍土土壤的物理性质与水动力学性质变异状况,在江苏沿海连云港市徐圩新区开展了试验研究。对5种不同盐渍化级别土壤进行取样,测定其pH、ECe、容重、总孔隙度、含水率和饱和导水率等,分析不同级别滨海盐渍土壤物化特性参数和水动力学性质变化规律。结果表明:(1)不同级别盐渍土0—50 cm剖面土壤ECe先变小后增大,但40—50 cm剖面ECe明显大于0—10 cm剖面。非盐渍土和极重度盐渍土0—50 cm剖面土壤ECe变化较小,轻度盐渍土、中度盐渍土、重度盐渍土的0—50 ...
祝瑜 +6 more
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