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小浪底地下厂房围岩稳定计算地质模型的研究   总被引:3,自引:0,他引:3  
根据工程勘探资料,在分析小浪底枢纽地下厂房区主要结构面的分布规律及其特征的基础上,建立了几何传真概化地质模型,并采用不连续介质有限元离散化计算模型,模拟计算地下厂房围岩的应力应变。计算结果表明,所建立的概化地质模型符合实际地质状况,计算的应力分布与实测的变形特征相吻合,这与目前按常用的其它模型及连续介质计算的结果有明显不同。  相似文献   

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稳定河床水位流量关系单值化原理   总被引:2,自引:0,他引:2  
采用数理计算方法建立流量与综合落差、稳定流流量计算公式,从而使受洪水涨落和变动回水影响的非单元值的水位流量关系单值化。为精减测次、简化外业洲验,水文预报、水文及整编工作电算化提供了新的分析手段。  相似文献   

4.
Conclusions  
1.  The experience of design works on the hydropower equipment of a hydrostation as large of a large number of suppliers requires a technical coordinator of the works with strict obligations on coordinating the designs of equipment with this coordinator before sending to the customer.
2.  At the stage of preparing the tender documents for complete delivery of hydrostation equipment it is necessary to enlist a design organization for a general assessment of the layout of equipment given in the tender drawings, for preparing alternative variants of the layout, and simplifying the process of final coordination of changes in the contract specifications in the case of winning the tender.
Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 3, pp. 52–54, March, 1998.  相似文献   

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根据哈尔滨水文水资源勘测总站实测水下地图及水文资料,针对桥梁上、下游浅滩变化,分析桥梁对水流的影响。  相似文献   

6.
Conclusions Additional detailed investigations of the foundation of the Khudoni arch dam performed at the detail design stage made it possible to refine the engineering-geological structure of the rock mass in the foundation of the structure, to evaluate its stress state, and to determine the variability of the physical and mechanical properties of the rock under the effect of natural and technogenic factors. These investigations showed that the structure of the investigated mass is characterized by a greater complexity than was assumed at the contract design stage, and the relatively high characteristics of the physical and mechanical properties of the rock in the interior parts of the mass in many respects are due to the effect of natural (tectonic and gravitational) stresses. With considerations of the results presented, it is necessary to maximally preserve the natural state of the interior parts of the mass when correcting the working drawings and selecting the technology of construction works.Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 2, pp. 44–49, February, 1990.  相似文献   

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官地水电站右岸导流洞进口渐变段50m断面由方形渐变到标准城门洞形,最大开挖跨度25.6m,高度25.3m,呈弱风化状态,为Ⅳ类玄武岩。在施工过程中该段经历两次塌方,分别两次对塌方段进行相应支护处理。根据隧洞结构和地质资料建立三维有限元数值计算模型,对塌方段各工况进行分析,证明了塌方支护处理的合理性和安全性。  相似文献   

8.
Conclusion The results obtained on estimating the reliability of the Khudoni arch dam on the basis of the strength condition under an unusual load combination indicates on the whole the ability of the structure to withstand strong earthquakes (intensity 7 and 8) without noticeable trouble-free operation of the structure.A decrease of the values of the reliability function at certain points of the dam (at levelsy=550 m andy=680 m of the downstream face and at levely=660 m of the upstream face) indicate the need to take local structural measures (for example, local reinforcement) to increase the strength of the sections and eliminate dangerous zones in the body of the dam.Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 12, pp. 49–52, December, 1988.  相似文献   

9.
沟后水库溃坝原因初步分析   总被引:1,自引:0,他引:1  
刘杰 《人民黄河》1994,17(7):28-32
沟后水库总库容330万m^3,大坝为钢筋混凝土面板砂砾石坝,坝高71m。1993年8月27日晚溃坝。初步分析溃坝原因是:渗流沿坝体上部施工层面逸出造成管涌破坏,并冲刷坝坡引起坝顶局部滑动,形成初期溃口,然后库水由口门大量下泄,进一步冲刷坝体,最终溃坝,设计时采用的控制砂砾石最大粒径的办法不可能起到控制砂砾石渗透性的作用。混凝土面砂砾石坝渗流控制的成功经验是在坝体中专门设置排水体。  相似文献   

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Operation of the dam in a transitional mode is described. __________ Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 1, January 2006, pp. 8–15.  相似文献   

11.
杨龙奎  王宏彦 《吉林水利》2011,(10):11-13,20
本文基于有限单元法,利用ANSYS软件计算和分析,总结出水工隧洞在不同位置的一些变化规律,希望这些结论能为今后的中、小型拱坝设计,施工中遇到坝肩山体开挖孔洞的情况及在拱坝后期的安全评价、维修加固过程中,为实际工程的修建和整治提供一个比较实用的理论依据与参考。  相似文献   

12.
1.  The predicted character of development of landslide movements permits saying that the slope is in a state of long-term creep and is extremely sensitive in the initial operating period to the character of technogenic effects.
2.  Long-term stability of the slope is provided only in the case of implementing the complete system of landslide-control measures.
3.  For monitoring the dynamics of the landslide process, it is necessary to continue instrumental observations during the entire operating period.
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 1, pp. 35–39, January, 1991.  相似文献   

13.
官地水电站右岸导流洞进口渐变段50m断面由方形渐变到标准城门洞形,最大开挖跨度25.6m,高度25.3m,呈弱风化状态,为Ⅳ类玄武岩。在施工过程中该段经历两次塌方,分别两次对塌方段进行相应支护处理。根据隧洞结构和地质资料建立三维有限元数值计算模型,对塌方段各工况进行分析,证明了塌方支护处理的合理性和安全性。  相似文献   

14.
南水北调西线工程水环境影响分析   总被引:8,自引:0,他引:8  
丁自鲜  尚宇鸣 《人民黄河》2001,23(10):17-18
南水北调西线工程调水后,引水坝址下游局部河段水量明显减少,但影响范围和程度十分有限。随着两岸环保力度的加大,排污量的减少,径流量减少对局部江段水质的不利影响,可得到控制。预估调水后下游水质不会发生类别变化。  相似文献   

15.
江都三站是南水北调东线工程首级提水泵站之一,为适应大流量,长时间调水运行的需要,对主水泵中位置特殊、作用重要、直接影响机组运行可靠性、连续性的水导轴承装置提出了更高的要求。现结合江都三站主水泵运行环境和机组台数多的特点,提出了水导轴承装置的基本要求,阐述了目前常见的水导轴承运用的情况,并进行了比较分析。重点对水润滑弹性金属塑料水导轴承在江都三站机组环境下运行的可行性进行了分析,有针对性的提出了预防措施,经分析证明,该轴承能够适应江都三站特殊环境的要求,方案经济、可行。  相似文献   

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门楣通气措施不仅可以消除阀门顶缝空化,而且可以抑制阀门底缘空化。通过对门楣缝隙比和掺气坎长度的研究,得到其临界条件和通气量大小,从而确定较优的缝隙比和掺气坎长度。  相似文献   

19.
改性聚丙烯纤维影响混凝土抗压强度的机理初探   总被引:3,自引:0,他引:3  
本文对田内外某些改性聚丙烯纤维影响混凝土强度的现象进行了分析。认为在改性聚丙烯纤维混凝土中,同时存在增强和损强因素。当增强因素大于损强因素时,混凝土强度增加.  相似文献   

20.
Analyses are presented for verification of the earthquake resistance of a dam. __________ Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 4, April 2008, pp. 30–35.  相似文献   

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