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块体理论赤平解析法在锦屏二级水电站皮带机隧洞稳定分析中的应用
引用本文:梁 宁 伍法权 ,刘 彤刘建友.块体理论赤平解析法在锦屏二级水电站皮带机隧洞稳定分析中的应用[J].力学学报,2009,17(3):383-388.
作者姓名:梁 宁 伍法权   刘 彤刘建友
作者单位:中国航天科技集团公司一院14所 中国航天科技集团公司一院14所 清华大学工程物理系 中国航天科技集团公司一院14所
摘    要:在小子样结构响应试验数据样本的基础上,利用支持向量机回归的方法模拟了圆柱壳体动态 极限应变峰值同壳体几何尺寸和外加脉冲载荷大小的非线性函数关系,同时通过改进的模拟 退火单纯形混合算法优化了支持向量机的性能参数,并将支持向量机回归分析的预测性能同 BP人工神经网络方法做了比较,验证了具有优化性能参数组合的支持向量机在小样本条件下 更好的预测和推广能力. 最后,从支持向量机回归模型导出了大尺寸圆柱壳体抗脉冲载荷的 强度极限同自身几何尺寸的多元函数关系,从而为该类型壳体设备抗脉冲载荷的强度分析提 供了一个可借鉴的预估模型. 研究结果表明了支持向量机在机械结构的强度预估和可靠性分 析等力学领域具有广泛的应用前景.

关 键 词:隧洞  不连续面  块体理论赤平解析法  块体稳定分析
收稿时间:2007-08-10
修稿时间:2008-05-27

APPLICATION OF BLOCK THEORY BASED STEREO-ANALYTICAL METHOD TO STABILITY ANALYSIS OF CONVEYOR TUNNEL AT JINPING Ⅱ HYDROPOWER STATION
LIANG Ning WU FaquanLIU TongLIU Jianyou.APPLICATION OF BLOCK THEORY BASED STEREO-ANALYTICAL METHOD TO STABILITY ANALYSIS OF CONVEYOR TUNNEL AT JINPING Ⅱ HYDROPOWER STATION[J].chinese journal of theoretical and applied mechanics,2009,17(3):383-388.
Authors:LIANG Ning WU FaquanLIU TongLIU Jianyou
Affiliation:Key Lab of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences|Beijing 100029 Graduate University of Chinese Academy of Sciences, Beijing 100049
Abstract:Block theory is an effective method on stability analysis of fractured rigid rock mass. There are a lot of discontinuous planes developed in rock mass of Jinping II hydropower station conveyor tunnel. So the stability of conveyor tunnel is related with  the presence of unstable blocks on excavation planes. This paper deals with the stability of the conveyor tunnel with Block theory based stereo-analytical method on the basis of detailed investigation of rock mass data. It makes judgments on the movable blocks such as sliding types  that are induced by all rock discontinuous planes  on each excavation plane of the conveyor tunnel. A conclusion is obtained that the sliding type of blocks is mainly single sliding. A relatively few sliding types of double-sided sliding and vertical block falling are also found. Also, the obvious statistical distribution result on the movable blocks in the conveyor tunnel indicates that there are some more instability blocks in the left wall, the left and right arches than the right wall.
Keywords:Tunnel  Discontinuous plane     Stereo-analytical method  Block theory  Stability analysis  Jinping Ⅱ hydropower station
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