river sand
英 [ˈrɪvə(r) sænd]
美 [ˈrɪvər sænd]
网络 河沙; 河砂; 沙子
双语例句
- The results show that the system using new combined fillers has better purification effect on polluted river water and higher hydraulic loading than the system using only river sand as fillers.
结果表明，新型混合填料渗滤系统对受污染河水的净化效果较好，系统的水力负荷也较单独以河砂为填料的渗滤池有大幅提高。 - While working in the shadow of the iron bridge, he tried his luck by dipping a pan into the river sand.
当他在铁桥下阴凉处干活时，随手把淘金盘浸入河沙中淘了淘，想碰碰运气。 - And the stability of filtered water, from the economic perspective, relatively, than the quartz sand or river sand and sea sand much lower.
且滤后水质稳定，从经济效益看，相对比较，本石英砂比河砂和海砂还是低廉得多。 - Low stand delta sand body and lowstand fan sand body are the most favorable ones for oil and gas exploration, and highstand delta sand body, highstand sublacustrine fan sand body, braided river sand body and fan-delta sand body are secondary.
低位三角洲砂体、低位扇砂体是油气勘探最有利的砂体，其次是高位三角洲砂体、高位湖底扇砂体、辫状河砂体、扇三角洲砂体。 - The industry waste slag fly ash or the river sand is used as the siliceous material.
工业废渣粉煤灰或河砂一般被用来作为硅质材料。 - The character of Ma lake depression Jurassic reservoir shows that the main reservoir composed of delta and river sand bodies of braided river.
通过对玛湖坳陷侏罗系储层特征的研究，表明该区储层主要为辫状河三角洲、河流相砂体。 - Yongding River sand land is the largest area of wind-sand land sand and is one of the most severe wind sand damage region in Beijing, Which has important influence to eco-entironment in Beijng.
永定河沙地是北京市面积最大的风沙化土地和风沙危害最严重的地区之一，对北京市的生态环境有重要影响。 - According to dynamic test method of simulating actual spray system in the laboratory, this paper studies influence of wet agents on dust removal efficiency using Yellow river sand as test sample.
在实验室中运用模拟实际喷雾系统的动力实验法，以黄河沙为实验样品研究了润湿型抑尘剂对降尘效果的影响。 - The application of artificial sand and river sand in ready-mixed concrete
人工砂和涂河砂在商品混凝土中的应用 - Research and practice of the abrasion effect of river sand on turbine in China
中国河流沙粒对水轮机磨损影响的研究与实践 - The cushion material for the RC faced rockfill dam mixed with the natural river sand is not recommended.
在1：1.3～1：1.4的坝坡下，面板坝垫层料掺天然河砂是不可取的； - The material and process for making bricks by iron ore tailings were presented. The proportion tests of iron ore tailings and slag, river sand and lime were studied. The effects of additional reagent, forming pressure and forming moisture content on compressive strength were also studied.
介绍铁矿尾矿制作砖的材料、工艺过程，研究了铁矿尾矿与炉渣、河砂和石灰的配比试验，以及外加剂、成型压力、成型水分对抗压强度的影响。 - Research on Silt as Embankment Filling Material The performance test of river sand as roadbed embankment material
粉土用作路堤填料的试验研究江砂在路基填筑材料中的性能试验 - Better results were also gotten with sugar, tap water and river sand instead of sucrose, deionized water and agar.
以市售白糖和自来水代替蔗糖和去离子水，以河沙代替琼脂试验均取得了良好的效果。 - Characteristic Adsorption and Impact Factors of Yellow River Sand to Some Heavy Metal Ions
黄河泥沙对某些重金属离子的特性吸附及影响因素研究 - Study on the Regularities of Wind-Erosion of Different Land-Use Types in Yongding River Sand Land, Beijing
北京市永定河沙地不同土地利用类型风蚀规律研究 - In this article graphite and active carbon energy storage aggregate were joined concrete, them replaced scree and river sand leave each other, normal method for preparing concrete and the phase-changing energy-storing aggregates were used.
通过把制备的活性炭储能骨料和石墨导热功能基元材料加入混凝土中，取代其中的卵石和河砂，用普通混凝土的制备技术制备相变储能混凝土。 - Test& Research on Drainage Model of Subgrade Composed of Changjiang River Sand
长江细砂路基排水模型试验研究 - Through constant dynamic stress ratio CU dynamic triaxial tests with the Changjiang River sand from Nanjing, strength and deformation behaviors of saturated sand under different dynamic stress paths are studied in this paper.
通过对南京长江砂土在等动应力比下的固结不排水动三轴试验，研究了饱和砂土在不同动应力路径条件下的强度和变形特性。 - Proportion design is done which applying for machine sand mixing thin sand to replace river sand, it settles strength and working performance of machine concrete, and summarizes quality control measures for secondary lining construction of pump concrete.
采用机制砂掺部分特细砂优化级配代替河沙进行配合比设计，解决了机制砂配制的混凝土强度和工作性能，总结出二次衬砌施工泵送混凝土质量的控制措施。 - River sand and sand but has different chemical composition and other dopants.
但是海砂有着与河砂不同的化学成分以及其它掺杂物。 - Therefore, the judgment of the meandering river ancient flow direction, combined with the modern method of stratigraphic correlation, can improve and strengthen the random walk modeling of meandering river sand body morphology and channel simulation.
因此，利用判断曲流河古水流方向，再结合现代地层对比方法，可以完善和加强随机游走建模方法对曲流河砂体形态及河道模拟的研究。 - Oil and gas can develop only from the reservoir rock connected with borehole, so it is indeed very important to clarify the river sand body static connectivity of oil and gas reservoirs.
油气仅能通过与井眼连通的储集岩采出，所以弄清含油气储层的砂体静态连通性非常重要。 - Finally carbonation depth and free chloride content of concrete in different depths were determined. and compared with river sand concrete.
试验后测定碳化深度和混凝土不同深度处自由氯离子含量，并与河砂混凝土进行对比。 - In road construction, whether or pavement subgrade structure of fine aggregate used are generally of river sand.
在道路工程建设中，无论是路基结构还是路面结构所使用的细集料一般都是河砂。 - With the expansion of the scale of construction and the shortage of river sand resource, sea sand has already been used as fine aggregate of concrete in many coastal areas.
随着我国建设规模的扩大，河砂资源短缺的现象日益突出，许多沿海地区已经采用海砂作为混凝土细骨料。 - After combined carbonation and chloride penetration test, the chloride content of sea sand concrete is the highest, and that of washed sea sand concrete and river sand concrete has no significant difference.
碳化与氯离子侵蚀复合作用后，海砂混凝土中的氯离子含量最高，淡化海砂混凝土和河砂混凝土无明显差异。 - The results show that dredging the Yangtze River sand, production increases 1.7% to 14.6%, an average of 8.4%. In addition, the paper also proposes a method to evaluate dredging performance based on measured data.
分析结果表明，疏浚长江口细沙时，单位时间产量提高1.7%到14.6%，平均提高8.4%。此外，本文还提出了一种基于挖泥船实测数据对疏浚性能进行评估的方法。 - On the other hand, over-exploitation of river sand can cause serious damage to the ecological environment.
另外一方面，过度开采河砂导致生态环境的严重破坏。 - Mountain sand is deficient in resources in Yunnan Province, and the exploitation of river sand is also very difficult, so machine-made sand is to mostly used in many engineering practice by rock blasting and breaking then re-grading.
由于云南省自然山砂资源匮乏，加上河砂的开采使用也存在很大困难，在很多工程实际中大都采用了经母岩爆破开采，再分级破碎而成的机制砂。