临界坡降,critical gradient
1)critical gradient临界坡降
1.Study ofcritical gradient of piping for various grain sizes in sandy gravels砂砾土各级颗粒的管涌临界坡降研究
2.According to the flume tests and basic theovetical analysis, several important formulas describing nonuniform muddy flow transportation,such as nondepositing velocity,critical gradient and ditch phase factors are deduced.在此基础上考虑推移部分影响,推导得出非均质泥流的不淤流速、临界坡降、沟道断面形态指标等重要的输移临界参数计算公式。
3.A brief analysis is carried out on the resulting conditions of sand gravel seepage deformation, on this basis, the modes of seepage deformation are assessed briefly and the calculation method ofcritical gradient for seepage deformation is presented.对砂卵砾石的渗透变形的形成条件进行了简要分析 ,在此基础上对渗透变形的形式进行了简要评价 ,并提出了渗透变形临界坡降的计算方法。
英文短句/例句
1.Study of critical gradient of piping for various grain sizes in sandy gravels砂砾土各级颗粒的管涌临界坡降研究
2.A Study on Landslide Susceptivity Classification and Rainfall Threshold in Wanxiu District of Wuzhou City in Guangxi Zhuang Autonomous Region;广西梧州市万秀区区域降雨型滑坡危险性区划及降雨临界值研究
3.critical rate of fall of commutating current换向电流临界下降率
4.A Method for Calculating Critical Water Depth of Open Channel with Trapezoid Section and Smooth Slope小底坡梯形明渠临界水深求法探讨
5.Numerical studies on the critical air velocity affected by tunnel slope隧道坡度对临界风速影响的数值研究
6.Analysis of Slope Stability Based on Compositely ant Colony Algorithm用复合蚁群算法确定边坡临界滑动面
7.Degradation of Polypropylene and Nitrile-Butadiene Rubber in Supercritical Water;超临界水降解聚丙烯和丁腈橡胶研究
8.Depolymerization Behavior of PE in Supercritical Water;聚乙烯在超临界水中的降解行为研究
9.Study on the Critical Speed of Settling Slurry in Horizontal Pipeline;沉降性浆体水平管道临界流速的研究
10.LOWERING PRESSURE METHOD IN SPACECRAFTS降压地面模拟技术中的临界压力研究
11.Statistical Inference of Probability Distribution for Critical Gradient of Silty Clay of Levee Foundation堤基粉质黏土临界比降概率分布推断
12.Supercritical Water Oxidation for Treatment of Organic Wastewater with Poor Biochemical Degradation难降解有机污水的超临界水氧化技术
13.Study on Critical Load of Acidic Deposition in Southern China我国南方主要酸沉降区临界负荷研究
14.Study on Polystyrene Degradation in Supercritical Solvents聚苯乙烯在超临界流体中的降解研究
15.Critical height of reinforced slope based on limit analysis upper bound method基于极限分析上限法的加筋土坡临界高度
16.Research on Failure Criterias and Critical Slip Surfaces of Rockmass Slope;岩质边坡失稳判据及临界滑动面确定方法研究
17.Search the Critical Slip Surface of Slope Based on Premium-Penalty Ant Colony Optimization基于奖惩蚁群算法的边坡临界滑动面搜索研究
18.Cusp Catastrophe Model for Slope Critical Failure以尖点突变模型为边坡临界失稳的判据研究
相关短句/例句
critical slope溢出坡降(临界坡降)
3)critical hydraulic gradient临界水力坡降
1.A physical model has been established on quick sand of complete wells and at the bottom of semi-spherical wells for dyke foundations of double-layer structure, and the dynamic progress of quick sand based oncritical hydraulic gradient is simulated in calculation examples by using the time-division stable flow theory.通过算例采用分时段稳定流理论模拟了基于临界水力坡降的流砂动态发展过程,建立了双层结构堤基发生流土的完整井流砂和半球形井底流砂物理模型。
4)critical seepage gradient渗流临界坡降
5)critical grade临界坡度
1.In the end,acquiring the correspondingcritical grade and critical sidetrack,in order to carry out rational development and use of geoloical structure and achieve the object of optimal construction scheme and maximum economic benefits.以块体理论为基础,运用全空间赤平投影法,对层状岩质基坑壁走向与开挖坡度的关系进行了优化,得出了相应的基坑壁开挖临界坡度和临界走向,以对地质构造进行合理开发和利用,从而达到施工方案最优化和经济效益最大化的目的。
2.With discussions on the necessity of erosion protection for highway embankment slopes and the deficiencies of previous research ofcritical grade, hydraulic analyses was carried out on the velocity and depth of runoff on the slope.首先分析了路堤边坡冲刷防护必要性及目前边坡冲刷临界坡度研究存在的不足,然后针对这些不足,对边坡径流流速、水深做了较为细致的水力学分析,利用泥沙动力学研究了坡面径流对土颗粒冲刷机理,得出了各主要坡面冲刷影响因素(降雨、坡高、坡面的粗糙系数、土粒比重与直径)与冲刷临界坡度的函数关系,并认为该坡度不是一个常数,而是一个受这些因素影响的可变区间。
6)critical gradient临界坡度
1.Research oncritical gradient for erosion of expressway embank slope based on energy method;基于能量法的高等级公路路堤边坡冲刷临界坡度研究
2.By means of mechanics of sediment transport, forces acting on soil grain are analyzed under the slope surface flow and calculation formula ofcritical gradient is set up.通过泥沙运动力学分析了在坡面流作用下土颗粒的受力情况,建立了临界坡度的计算公式。
3.The slope gradient has an important influence on soil erosion and thecritical gradient exists under the condition of rainfall.针对降雨条件等环境影响条件下路堑边坡存在的临界坡度,指出坡面流侵蚀的定义并系统分析了坡面流侵蚀的主要影响因素,利用泥沙运动力学理论,研究了坡面土壤侵蚀率与坡面流的剪切力之间的变化关系。
延伸阅读
渠道坡降渠道坡降slope of canalqudao Pojiang渠道坡降(slope of eanal)渠道上、一下游两个断面之间渠底沿水流方向下降或上升的高差与该染段水平长度的比值。也称渠道比降。合理选择渠道坡降，不仅关系到渠道输水能力的大小和渠道的稳定性，而且也影响渠道和建筑物的工程量以及灌溉面积的大小。因此，渠道坡降应根据渠道沿线地面坡度，上、下级渠道水位衔接要求，渠水含沙量及渠道沿线土质等因素，综合分析后合理选定。当水源供水的含沙量较大时，应以防淤作为选择坡降的主要依据;在平原区或提水灌区，供水的含沙量很小时，应以减小水头损失、增大灌溉面积作为主要依据;若地面坡降较陡，土质较轻时，应以防冲作为选择坡降的主要依据。综合利用渠道的坡降还应考虑其它用水部门(发电航运等)的特殊要求。(李恩羊)
