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环保疏浚泥浆脱水干化技术研究进展 总被引：2，自引：0，他引：2
胡保安 《水资源与水工程学报》2009,20(4):132-136
环保疏浚过程中产生的大量污染底泥堆放在底泥堆场,不能快速脱水干化,尤其是在雨水丰富的地区,长时间占用土地资源,增加工程投资.本文在总结分析国内外环保疏浚底泥干化技术的基础上,系统地介绍不同底泥干化技术及其应用现状,并分析存在的问题,探讨了今后的发展趋势. 相似文献
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采用二维潮流泥沙数学模型,根据深圳西部港区主要港口的年维护疏浚量,计算分析疏浚工程对周围港区回淤的影响,为港区施工的科学管理提供依据。 相似文献
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K. S. Bogolyubov B. S. Krakovskii L. A. Titov A. D. Buntman E. A. Lokhankova 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1990,24(3):195-199
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 3, pp. 28–30, March, 1990. 相似文献
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B. V. Ukhin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2005,39(4):204-210
It is shown that the ejector head depends on the ratio of the momentum of the working flow to the momentum of the total flow
and increases substantially upon increase in the rarefaction at the inlet to the pump.
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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 5, May 2005, pp. 29 – 35. 相似文献
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江苏省亚太集团公司联合国内多家科研机构和大专院校开发的国家重大科技装备国产创新研制项目——DLC1200/500型斗轮式挖泥船,是目前我国第一艘接近国际先进水平的大型、高效清淤设备,在设计、制造及工艺等方面都有所创新,更加适合我国国情。 相似文献
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B. V. Ukhin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2002,36(3):168-172
The results of integrated studies intended to increase the energy parameters of a pump are described. 相似文献
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N. V. Khanov 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1997,31(11):694-698
Model studies of the hydraulic operating conditions of an eddy tunnel outlet with an inclined shaft showed that:
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 11, pp. 41–44, November, 1997. 相似文献
| – | for regimes without delivery of air into the flow core with swirler parameterA=1.1 and with delivery of air for all values ofA, submergence of the outlet section of the conduit in the lower pool noticeably affects the size of the core and promotes the formation of a hydraulic jump zone along the tunnel; |
| – | insignificant (in value) submergences of the exit section of the tunnel have little effect on the discharge capacity of the outlet (their differences is Δ=1.4% forA=0.6, Δ=2.71% forA=1.1, and submergence even increases the discharge of the outlet Δ=0.8% forA=0.83). |
| – | delivery of air into the flow core has little effect on the discharge capacity of the structure, with the exception of the layout with a swirler withA=0.6 (Δ=4.31% forA=0.6, Δ=0.5%, and Δ=0.9% forA=1.1); |
| – | considerable vacuums are observed for regimes without air in the flow core, the absolute values of which with increase ofA drop intensely from Hfc=−4.5 m to Hfc=−0.3m; |
| – | delivery of air into the flow core markedly reduces the vacuums in it and their values are close to zero; |
| – | with increase of swirler parameterA the area occupied by the flow at the end of the tunnel decreases; |
| – | regimes without delivery of air into the flow core are the most favorable with respect to the conditions of the pressure distribution on the conduit walls; |
| – | submergence on the downstream side does not lead to an increase of pressure on the conduit walls if the vacuum in the flow core increases simultaneously with this. |
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An exact three-dimensional analysis based on the linear potential theory and the elaborated method of eigenfunction expansion in elliptic coordinates are presented to study the free coupled elasto-hyrodynamic characteristics of an upright non-deformable cylindrical container of elliptical planform with a flexible bottom plate, filled to an arbitrary depth with an inviscid incompressible liquid. Extensive numerical data are presented in an orderly fashion for the first few symmetric/anti-symmetric coupled hydroelastic natural frequencies as a function of fluid depth parameter for two plate aspect ratios. Also, selected hydrodynamic and structural deformation modes shapes are presented in graphical form. The effects of liquid level, bottom plate elasticity, and cross sectional aspect ratio on the sloshing frequencies and hydrodynamic pressure modes are examined. The validity of the results is examined through computations using a commercial finite element package as well as by comparison with the data available in literature. 相似文献
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A. S. Zalesov S. E. Lisichkin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1992,26(6):383-387
| 1. | The effect of an inclined face on the stress state of concrete and reinforcedconcrete members was investigated. It was established that shear stresses are a function not only of the transverse force but also of the bending moment and slope angle of the face. |
| 2. | Calculations showed that the presence of an inclined face favorably affects the character of the distribution of shear and principal tensile stresses, as a result of which it is possible to reduce the amount of reinforcement installed for absorbing the principal tensile stresses. |
| 3. | It is recommended to supplement the points of the design standards related to calculation of members on the basis of principal tensile stresses with respect to consideration of the effects of the slope of the face for the appropriate class of members. |
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特大断面斜井滑模是一项新型斜洞衬砌混凝土施工技术。文章主要介绍龙滩水电站地下厂房系统工程引水斜井滑模施工的技术和施工方法,包括滑模的安装技术、独特的滑模牵引技术、混凝土施工技术和工艺方法、斜井混凝土施工安全技术等,为以后的同类型斜井衬砌混凝土施工提供借鉴。 相似文献
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