哈拉布拉水库大坝坝体沉降变形分析

水库大坝变形特别是沉降值,是反映水库安全运行的重要数据,哈拉布拉水库在施工、运行过程中,其内部变形和外部变形,经监测和测量数据表明,大坝变形尤其是沉降量,与同类型堆石坝对比都很小,目前水库运行安全正常。对其原因分析有:坝基覆盖层全部清除,坝体直接座落在基岩上,大幅度减少了坝基沉降值;大坝坝体堆石体填筑碾压标准提高,孔隙率由原设计28%和24%降低为22%,大坝坝体压缩变形小,降低了坝体沉降量。以上表明建设过程中的施工质量控制及变更措施对大坝安全运行产生了有利影响。

Reservoir dam in particular settlement value is the reaction of important data safe operation of reservoirs,karabura reservoir construction and operation process,the internal deformation and external deformation,through monitoring and measurement data show that the dam deformation,particularly is a settlement,compared with the same type of rockfill dam is very small,safe operation of the reservoir normal.Analysis of its causes are： foundation cover all clear,the dam is located directly on bedrock,and greatly reducing the value of foundation settlement;filling compacted rockfill dam standards to improve the porosity of the original design of 28% and 24% reduced to 22%,dam deformation is small,reducing the dam settlement;above show that the process of building and construction quality control measures to change the safe operation of the dam had a beneficial effect.