• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    ABSTRACT

    2017-04-07 08:32:19
    水利水電工程設(shè)計(jì) 2017年2期

    In rock slope, most of the instability failure is controlled by the structural plane, the basic failure modes can be divided into 3 types: plane sliding, wedge sliding and toppling failure. Kinematics analysis is widely used in studying rock slope stability controlled by the structural plane, it is a method of preliminary determination of slope stability and failure mode in polar stereographic projection drawings by using stereo projection and vector algebra theory. It introduces the method of slope kinematic analysis with DIPS software, and makes analysis and discussion by taking the powerhouse back slope of a hydropower station in Pakistan as an example.

    Key words:rock slope, stability, kinematic analysis, failure mode, stereographic projection.

    Stability Stress Analysis of Support Structure of Soft Rock and High External Water Tunnel Section

    Ding Jiafeng, Sun Qichen, He Xiaomeng

    (China Water Resources Beifang Investigation, Design and Research Co. Ltd., Tianjin, 300222)

    ANSYS and PHASE2 are used for finite element calculation of soft rock and high external water tunnel section, including seepage calculation and stability stress analysis of support structure. It makes use of the advantages of seepage field calculation considering the drainage effect of drainage pipe in ANSYS, and combines with the specialty of tunnel excavation calculation of PHASE2, to make the stability calculation of the support structure more simple and get more safe and reliable results, which can provide reference for the design and construction of high external water tunnel.

    ANSYS, PHASE2, support, stability.

    Study on Wanjiagou Arch Dam Reinforcement Scheme

    Fan Ruipeng, Ren Tang, Zhu Tao, Zi Juan

    (China Water Resources Beifang Investigation, Design and Research Co. Ltd., Tianjin, 300222)

    The barrage of Wanjiagou reservoir is a concrete double curvature arch dam. The reservoir was built in 1997 and has been running for nearly 20 years, there are many hidden dangers. It was identified as Class Ⅲ dangerous dam in 2009. This text defines the problem of excess of tensile stress of the dam body, puts forward the scheme for solving this problem, and studies 3 dam reinforcement schemes (insulation layer restoration, gravity dam reinforcement, arch dam reinforcement) through reviewing the dam body stress of Wanjiagou arch dam and studying the reinforcement scheme. After comprehensive comparison, it is recommended to adopt the arch dam reinforcement scheme.

    Key words:dangerous reservoir, reinforcement, double curvature arch dam.

    Brief Introduction to Calculation Method of Water Demand for Irrigation Area of Lujiaba Reservoir

    Weng Jianping, Zhao Guojie, Liu Wujun

    (China Water Resources Beifang Investigation, Design and Research Co. Ltd., Tianjin, 300222)

    The irrigation area of Lujiaba reservoir is 496 hm2(7 441 mu), and theP=80% typical annual net irrigation quota of rice and rape in irrigation area is 4 605 m3/hm2(307 m3/ mu) and 1 335 m3/hm2(89 m3/mu) respectively.P=80% typical annual irrigation gross water demand is 3.87 million m3, the average annual irrigation gross water demand is 3.45 million m3, and comprehensive gross irrigation quota is 6 960 m3/hm2(464 m3/mu).

    Key words:Lujiaba reservoir, net irrigation quota, irrigation area, water demand.

    Kinematic Analysis of Rock Slope Stability

    Zhang Xuedong, Liu Xiangfei, Yi Xuefeng, Hu Jianfeng

    (China Water Resources Beifang Investigation, Design and Research Co. Ltd., Tianjin, 300222)

    临澧县| 巴林左旗| 丰都县| 资阳市| 斗六市| 敦化市| 竹溪县| 杭锦旗| 龙井市| 康保县| 鄂托克旗| 千阳县| 泾源县| 铜川市| 江孜县| 名山县| 石渠县| 达州市| 甘孜县| 新田县| 永昌县| 合川市| 神木县| 平果县| 百色市| 朝阳区| 贡山| 盐源县| 牙克石市| 随州市| 阿拉善左旗| 浦城县| 邮箱| 望城县| 台北市| 桂林市| 昌乐县| 通城县| 闽侯县| 武冈市| 凤凰县|