共查询到17条相似文献,搜索用时 140 毫秒
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张河湾抽水蓄能电站上水库工程为沥青砼面板堆石坝,该水库利用下水库老爷庙山顶开挖筑坝围库而成,采用沥青混凝土面板全库盆防渗。该水库坝坡为1∶1.75,沿坡铺筑60cm的级配碎石垫层料,并碾压密实后喷涂乳化沥青保护垫层料区坡面。该文结合张河湾抽水蓄能电站上水库沥青面板堆石坝斜坡碾压施工,对斜坡级配垫层料施工铺筑及碾压施工质量控制进行探讨,以便总结经验。 相似文献
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变形模量是岩土工程力学特性的一个重要指标,现场压板荷载试验计算变形模量是最直接有效的方法。河北张河湾抽水蓄能电站上水库边坡施工开挖后全强风化细砂岩出露较多,对沥青混凝土面板的变形影响较大,通过对不同风化程度的细砂岩取样进行细砂岩变形模量试验,为工程设计提供地质依据。 相似文献
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1 工程概况
宝泉抽水蓄能电站位于河南省新乡市辉县境内,该抽水蓄能电站共安装4台立轴单级混流可逆式水泵水轮机组,机组单机容量300MW,总装机容量为1 200MW.电站枢纽由上水库、下水库、引水系统、尾水系统、地下厂房洞室群、地面开关站和中控楼等建筑物组成.上水库工程中斜坡垫层料的摊铺与碾压是库岸施工的一个关键环节,其施工质量直接影响到水库防渗面板的施工质量,施工技术要求较高,施工难度也相对较大.库岸开挖坡比设计为1:1.7,坡长97.7m.在库岸岸坡上铺筑60cm(压实厚度)的垫层料.碾压总方量为74 608m3. 相似文献
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L.Q. Zhang Z.Q. Yue Z.F. Yang J.X. Qi F.C. Liu 《Tunnelling and Underground Space Technology incorporating Trenchless Technology Research》2006,21(6):636-649
This paper presents a displacement based back-analysis method for the determination of rock mass modulus (E) and the horizontal in situ stress (P) perpendicular to the axis line of the tunnel excavation in hard and intact rock masses. The rock mass is assumed to respond in an isotropic and linear elastic manner. Essentially, the method is a best-fit solution of back-analysis by comparing the measured displacements near a tunnel face during excavation with those calculated using a three-dimensional finite element method. The method can be applied efficiently and effectively by iterative algorithms such as direct search technique and damping least square technique. In particular, a three-dimensional finite element pattern technique (3-D FEPT) is used to compute the theoretical displacements for saving computation time. The method is further illustrated with a case study. The case study deals with a test adit at Zhanghewan Pumped Storage Power Station in Hebei Province, North China. It is shown that the back-analyzed results of E and P are reliable and representative for the actual rock masses. 相似文献
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施工控制网是抽水蓄能电站土建施工和机电安装的重要基准,惠州抽水蓄能电站施工周期长(历时7a)必须定期复测、检验其稳定性,为施工提供稳定的测量精度.论文结合惠州抽水蓄能电站施工控制网复测实例,采用科学的方法进行复测,得出的结果与原成果进行的比较和分析,成果正确、稳定、可靠,为电站安全施工提供了高精度测量基准. 相似文献
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通过对某抽水蓄能电站勘察成果的分析,重点阐述工程区的岩溶水文地质、上水库渗漏、下水库渗漏,提出了工程区岩溶发育分三个高程的看法及库盆防渗的处理措施,供同行在相似地质条件下的勘察工作中参考。 相似文献
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某电站模型洞围岩位移反分析及预测研究 总被引:1,自引:0,他引:1
张河湾抽水蓄能电站位于河北省井陉县测鱼镇甘陶河干流上。电站安装4台单级混流可逆式水泵水轮机组,总装机容量为1000 MW。地下厂房开挖尺寸(长×宽×高)为151.1 m×23.4 m×48.3 m。为进一步研究地下厂房围岩稳定性和优化设计参数,在地下厂房近旁进行了模型洞围岩观测试验研究,依据模型洞围岩收敛位移、钻孔多点位移、锚杆应力观测结果,进行了反分析,计算结果:水平应力2.52~2.88 MPa,应力比值0.7~0.8,弹性模量26.0 GPa。依据反分析的围岩初始地应力及变形参数,对主厂房及主变室围岩位移及应力分布进行了预测,结果表明,围岩变形均较小,且与地下厂房围岩位移实测值一致性较好。 相似文献
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H. Zhiquan D. Fuchu J. Xiaochen W. Sijing L. Huaye L. Handong 《Bulletin of Engineering Geology and the Environment》1999,57(3):267-272
This paper discusses the method of evaluating the shear strength of a rock mass for the Baoquan Pumped Storage Power Station
project. Formulae are presented from which numerical characteristics of the shear strength can be derived. The results are
compared with those obtained by the centre point of group and least squares methods. The random-fuzzy method is shown to be
the more realistic and appropriate approach, allowing for fluctuations of the parameters and corresponding well with the test
values.
Received: 6 April 1998 · Accepted: 11 June 1998 相似文献
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A wide range of cracking happens in concrete lining at the crown of the lower adit and high-pressure bifurcation in the water-filled test of bifurcation tunnel at Huizhou Pumped Storage Power Station. Then a field investigation is undertaken to explore the main reason of such prominent lining cracking. Through investigating several possible inducing factors, it is found that mass defects exist in the concrete lining in constructing bifurcation tunnel, and insufficient thickness of concrete lining is probably the main factor causing lining cracks. In order to verify if this conclusion is reasonable, comparative analysis through numerical simulation is utilized to assess the influence of different concrete thicknesses on tunnel stability for the lower adit and high-pressure bifurcation. And then the fracturing process of concrete lining with the increase of internal water pressure during the water-filled test is simulated. The results reveal that the displacements and tensile strains in the lining crown are significantly bigger than other parts of tunnel, with deficiency in concrete thickness considered. It is also concluded that whether the cavities exist or not in the crown, rather than the cavity thickness, is the main factor influencing the values and distributions of the tensile strains and displacements for tunnel lining. Besides, the distribution of tensile-strain-concentrated zones is approximately in good agreement with the in-situ fractured status of concrete lining. Finally, a conclusion can be drawn that deficiency in concrete thickness in the crown is the primary triggering factor for lining cracking. 相似文献