砂卵砾石地基上的土石坝分区材料研究

发布时间：2018-06-12 03:43

本文选题：砂卵砾石地基 + 分区材料坝　；参考：《中国水利水电科学研究院学报》2016年02期

【摘要】：云南青山嘴水库主坝为坐落在砂卵砾石地基上的砾石(黏)土心墙石渣坝。针对其筑坝材料的料源组成复杂、地基存在不均匀沉陷及地震液化问题等特点,对坝基砂卵砾石层进行强夯处理,防渗心墙采用砾石土料和黏土料两种防渗土料填筑,坝体采用以砂泥岩为主的夹砂砾岩、砾岩石渣料填筑;防渗心墙反滤层按保护两种心墙料要求设计,心墙下游坝基面按满足与坝体间的过渡关系设置水平反滤层,有效地解决了坝体和坝基的渗透破坏问题,使心墙防渗土料和坝基砂卵砾石层均得到保护,保证了大坝的渗透稳定性。工程于2009年投入运行,实测不同库水位情况下的主坝渗漏量变化和坝体累计沉降量均低于设计值,施工质量良好,运行情况稳定。
[Abstract]:The main dam of Qingshanzui Reservoir in Yunnan Province is a gravel (clay) core wall and slag dam located on sand and gravel foundation. In view of the complex material source composition of dam construction material, the uneven settlement of foundation and the problem of seismic liquefaction, the sand and gravel layer of dam foundation is treated with dynamic compaction, and the impervious core wall is filled with two kinds of impervious soil materials, gravel soil material and clay material. The dam body is filled with gravel-gra@@ The seepage failure problem of dam body and foundation is solved effectively, and the impervious soil material of core wall and sand and gravel layer of dam foundation are protected, and the seepage stability of dam is ensured. The project was put into operation in 2009. The leakage change of main dam and the accumulative settlement of dam body under different reservoir water levels are all lower than the design value. The construction quality is good and the operation condition is stable.
【作者单位】：云南省水利水电勘测设计研究院;云南省人民政府投资项目评审中心;
【分类号】：TV641;TV41

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