高面板堆石坝面板高应力区分布特性及抗震措施研究

来源 :第167场中国工程科技论坛暨2013水安全与水利水电可持续发展高层论坛 | 被引量 : 0次 | 上传用户:zy205806
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把握高面板堆石坝混凝土防渗面板在静、动力荷载作用下的高应力区分布特性及其规律,并采取合理的工程措施进而有效降低面板地震应力,保证强震时超高面板坝的安全运行,是面板坝跨越200m级向更高坝发展亟待解决的关键技术问题之一。本文对不同坝高以及河谷岸坡比的典型高面板坝进行了三维有限元静、动力计算,重点分析面板顺坡向拉应力和坝轴向压应力的高应力区分布特性及其规律。在此基础上,提出在有效区域内设置永久水平缝以释放面板地震应力的工程措施,详细分析了水平缝设置高程及其长度对地震应力改善效果的影响,并建议了采用柔性加筋结构的组合措施。
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