1) critical water power gradient
临界水力坡度
1.
And adopts the statistical method(including uneven coefficient method,granule content method and seepage coefficient method),Indoor test piece boiling experiment method and onsite boiling experiment method to synthetically dicide foundation critical water power gradient(I_(cr)).
阐述了本钢南芬拦水坝坝基渗透变形试验的方法和过程;采用统计法(含不均匀系数法、细粒含量法、渗透系数法),室内试件管涌试验法及现场管涌试验法来综合判定地基临界水力坡度(Icr);并提出了在评价碎石类土坝坝基时,为确定临界水力坡度(Icr)而应优先采用的统计方法,同时指出了伊斯托明娜统计法应用的局限性。
2) 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 on critical 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。
3) critical grade
临界坡度
1.
In the end,acquiring the corresponding critical 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 of critical 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。
4) critical gradient
临界坡度
1.
Research on critical 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 of critical 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 the critical 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。
5) critical slope
临界坡度
1.
It is considered that the critical slope and steady slope can be formed for condition of characteristic flow during river closure of main channel.
认为在三峡大江截流特定的水流条件下，可以形成临界坡度和稳定坡度两种坡度。
2.
But,there is a critical slope.
坡度是影响坡面土壤侵蚀的重要因素,在一定条件下,坡面土壤侵蚀随着坡度的增大而增加,但存在一个临界坡度,当超过这个坡度后,坡面土壤侵蚀量反而随着坡度的增大而减少。
6) critical slope gradient
临界坡度
1.
The calculative method of critical slope gradient was got from combining the incipient velocity formula and rill stable condition.
结合细沟泥沙起动公式和细沟稳定条件得到坡面侵蚀临界坡度的计算方法。
2.
With the same slope length,the critical slope gradients for soil erosion and mineral nitrogen loss were validated between 15° and 20°.
室内模拟降雨试验表明,当坡长一定时,不仅土壤侵蚀量存在一个“侵蚀临界坡度”,土壤矿质氮流失量随坡度变化也存在一个“养分流失临界坡度”。
3.
From the following four aspects: drag forces, velocity, energy and sediment carrying capability of slope surface flow, the threshold gradient of slope surface erosion in the granite area in the south of china is discussed, and it is obtained the critical slope gradient is from 35 to 43 degree.
从坡面流拖曳力、流速、能量及挟沙力４ 个方面，分析了南方花岗岩地区坡面侵蚀临界坡度，得出其临界坡度为３５～４３
补充资料：尾矿输送水力坡度
尾矿输送水力坡度
hydraulic slope of the flow of tailings slurry
we}权uang shusong shul{!Podu尾矿输送水力坡度(hydraulie slope of theflow of tailings slurry)尾矿浆体流经单位长度管、槽的水力摩阻损失，即能量损失。尾矿输送水力坡度是决定尾矿糟敷设坡度和选择压力输送设备的主要依据，它的准确确定对尾矿水力输送至关重要。如计算结果偏小，会使尾矿输送系统不能正常运行，甚至导致工程的失败。输送尾矿的水力坡度常比在同样条件下输送运载流体(水)的水力坡度大。其增大量与尾矿粒度、浓度、流速、管槽断面尺寸、边壁粗糙程度和浆体温度等因素有关。应用不同的理论和_方法可得出不同的水力坡度计算方法。 粒度小于。.osmm的微细颗粒混相流，在低浓度下流动时，多呈均匀的分散系，可作为均质的单一流体处理。测定其非牛顿流体的流变参数，得出浆体的雷诺数及范宁(Fanning)阻力系数，可用流变法计算其水力坡度。粒度大于。.05mm的混相流，重力对颗粒的影响大于惯性力的影响，流动时有产生沉降的趋势，常作为非均质两相流处理，应用重力理论可得出中、粗颗粒混相流水力坡度的计算方法对导致两相流输送水力坡度比清水大的诸因素进行因次分析，并与试验值对比，求出系数与指数，可用因次分析法得出计算公式。实用中对均质的微细颗粒混相流多按范宁公式汁算;对非均质的中、粗颗粒混相流可按杜兰德(R.Durand)公式计算。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条