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dredging depth
相关语句
  挖泥深度
     The function of bucket dredger in waterway dredging project is introduced. Through controlling the dredging depth, plane location, dredging slope and construction method, etc. , the goal of good quality, high efficiency and low cost have been attained.
     介绍链斗式挖泥船在航道疏浚工程中的作用,通过对挖泥深度、平面位置、挖泥坡度、施工方法等方面的控制,达到高质量、高效率、低成本的目的。
短句来源
  开挖深度
     The jet sand-handling equipment under the water is possessed of simplified structure, reliable running and high dredging depth. It can dredge the sand throuhg the layer of soft mud and sand gravel. The design theory and calculation method of the jet sand-handling equipment and simulation experiment and field test are done.
     水下射流采砂装置结构简单,工作可靠,开挖深度大,可以在深水淤泥覆盖层下和在砂卵石层中采砂.本文提出了该装置的设计理论及计算方法,并进行了室内模拟试验及现场生产试验.设计计算与试验结果基本符合.
短句来源
  “dredging depth”译为未确定词的双语例句
     Simulating experiment in laboratory revealed that a dredging depth of 10 cm could make the quality of lake water ameliorate within a short period, and dredging practice of the depth more than 10cm seems unnecessary.
     室内模拟试验结果表明,疏挖10cm沉积物即可起到短期治理水体的作用,过多的疏挖只能增加不必要的人力、财力的浪费。
短句来源
     For this reason and that all rivers dredging reached the hard sludge without researching on the rivers, the experts of this field put forward the better dredging depth of the polluted seriously rivers and that those rivers were need to be dredged ecologically.
     针对这一争议性问题,结合当前河道疏浚没有先对疏浚河道展开调研,而均定性地清除底层硬质泥以上的各层底泥这一现状,相关专家提出了重污染河道底泥最佳疏浚深度的概念,并提出对城市重污染河道应进行生态疏浚。
短句来源
     This dredger is the biggest cutter suction dredger designed and constructed in our country. It has the main characteristics of shallow draught, large dredging depth, high production as well as the capabilities of working at inland river and coastal areas.
     本船是我国自行设计建造的最大型绞吸式挖泥船,其特点是浅吃水、大挖深、高产量,并可兼顾江海作业。
短句来源
     Technical innovations were carried out to 200m 3/h cutter suction dredgers, which satisfied a dredging depth of 16m, spoiling distance of 1500m and dredging capacity of 350m 3/h.
     对 2 0 0 /h绞吸式挖泥船进行技术改造 ,使其挖深达 16m ,排距 15 0 0m ,疏浚能力达 35 0 /h。
短句来源
     Introduced measurement principle and development of dredging technology for polluted sludge. Verified the dredging depth accuracy which should be kept no higher than 10 cm.
     介绍了污染底泥环保疏浚技术的发展、测量原理,通过示范工程,验证了挖泥精度控制在10cm之内。
短句来源
  相似匹配句对
     On the “In-Depth-Report”
     浅谈“深度报道”
短句来源
     The Depth of Toleration
     宽容的深度
短句来源
     The aim of this paper is to expose the depth of modern literature in spirit dredging.
     因而 ,疏理这种意义隐晦的情形 ,并借此揭示新文学在精神开掘方面所达到的深度就成了文中之旨
短句来源
     An exposition of the spiritual depth is attempted in dredging this clue as well .
     因而,疏理这种意义隐晦的情形,并借此揭示新文学在精神开掘方面所达到的深度就成了文中之旨。
短句来源
     Guangzhou Dredging Company
     广州航道局
短句来源
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  dredging depth
The quality expectation reflects the requirements of the authorities on the dredging depth, width and side slope.
      


The physical model is constructed with three open boundaries to simulate the natural condi- tions in Guanhe Estuary.Applying the water discharge control technology to three open boundaries, the authors have succeeded in reproducing the complicated rotating tidal current in the model of Guan- he Esturay,and in making many experinents on the regulatory works of bar shoal.The results indicate that to develop the deep channel in the Guanhe Estrauy,the principle of combining dredging with reg- ulating should...

The physical model is constructed with three open boundaries to simulate the natural condi- tions in Guanhe Estuary.Applying the water discharge control technology to three open boundaries, the authors have succeeded in reproducing the complicated rotating tidal current in the model of Guan- he Esturay,and in making many experinents on the regulatory works of bar shoal.The results indicate that to develop the deep channel in the Guanhe Estrauy,the principle of combining dredging with reg- ulating should be taken. In open areas without regulating engineering projects,the larger the dredged depth of the channel,the larger the angle between the tidal current and the axial line,and the more the current velocity attenuation.In the selection of the channel axis in the open area,the axis should follow the main direction of the tidal current,and be perpendicular to the isobath of the outer sea.In the plane layout of double dikes,the sudden expansion or contraction should be avoided.The elevation of the top of the dike should be identical with middle tide level.These experimental results can be used by designing departments for reference.

对开敞的灌河口外海域,应用三面开边界模型布置,采用边界流量控制技术,成功地复演了复杂的海域旋转潮流,并对拦门沙治理进行了多方案试验。成果表明,开发灌河口外深水航槽,宜采用整治与疏浚相结合的原则;在没有治导工程的开敞水域,挖槽开挖深度愈大、轴线与潮流交角愈大,则流速衰减愈大;在开敞水域选择航槽轴线,要顺应涨落潮流主轴方向,并尽量与外海等深线相垂直;双导堤平面布置不宜呈突然扩大或收缩状,堤顶高程宜与中潮位一致。该成果可供设计部门参考。

The jet sand-handling equipment under the water is possessed of simplified structure, reliable running and high dredging depth. It can dredge the sand throuhg the layer of soft mud and sand gravel. The design theory and calculation method of the jet sand-handling equipment and simulation experiment and field test are done. Compared the results of the experiment with the design theory, they agree well.

水下射流采砂装置结构简单,工作可靠,开挖深度大,可以在深水淤泥覆盖层下和在砂卵石层中采砂.本文提出了该装置的设计理论及计算方法,并进行了室内模拟试验及现场生产试验.设计计算与试验结果基本符合.

A Mathematical Model that can simulate 3-D flow in the dredged channel was estabil-ished in this paper. The pressure was devided into the moviable pressure and the hydrostatic pressure. The discrete scheme of 3-D partial differental equation was induced by the controlvolume method. The moviable pressure field was solved by wsing Patankar--Spalding'spressure correction method, then the water level control equation was solved, the newest water level was instead of the water level in the pressure correction...

A Mathematical Model that can simulate 3-D flow in the dredged channel was estabil-ished in this paper. The pressure was devided into the moviable pressure and the hydrostatic pressure. The discrete scheme of 3-D partial differental equation was induced by the controlvolume method. The moviable pressure field was solved by wsing Patankar--Spalding'spressure correction method, then the water level control equation was solved, the newest water level was instead of the water level in the pressure correction method, based on this procedure, the approxmated solution was obtained. The hgdrostatic pressure approxmation and the rigid approxmation were not used in this model, but the unpressable fluid flow problem with free surface can be simulated. The calculated velocity distribution in dredged channel was close agreement with the experimented one. In addition, the fields of the every kind depth, ratio of dredged depth and bottom width in national condition were calculated in this paper.

本文提出了一种模拟挖槽内三维流动的数学模型.该模型将压力分解为动水压力与静水压力之和.由控制体积法导出三维偏微分方程的离散格式.采用Patankar和Spalding提出的压力校正法求解动水压力场.然后求解水位控制方程.用最新求出的水位替代压力校正法中的水位.如此循环迭代直至收敛.该模型无须采用“静水压力假定”和“刚盖假定”.能够模拟不可压缩流体含自由表面流动问题.利用该模型计算得到的挖槽内流速分布与水槽试验值吻合.此外,本文还计算了相当于天然情况各种水深、各种挖深比、各种挖槽底宽下挖槽内的流场.

 
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