碾压混凝土薄弱区域压实质量精细评价方法

现行碾压混凝土坝压实质量评价体系中仅以统计意义下检测点质量合格率为评估标准,未针对薄弱区域影响因素进行具体分析,导致达标施工仓面仍可能存在危害坝体运行安全的质量缺陷风险.对此,提出一种薄弱区域压实质量精细评价方法,首先基于加权平均思想,同时考虑薄弱区域压实度差异和面积形态特性,建立薄弱区域欠压综合评价指标M;然后引入V...

Study on Fine Quality Evaluation Method of Compaction Weak Areas of RCC

In the current evaluation system of RCC dam compaction quality,only the qualified rate of inspection points under the statistical significance is taken as the evaluation standard,and no specific analysis is made for the influence of weak areas,resulting in the risk of quality defects that may endanger the safety of dam operation.Aiming at the above-mentioned problem,a fine evaluation method of compaction quality in weak areas is proposed.Based on the idea of weighted average,considering the difference of compactness and area shape characteristics of weak areas,the comprehensive evaluation index M of weak area was defined.The CVvalue of Voronoi polygon was introduced to measure the spatial distribution characteristics of weak areas,thereby guiding the selection of routine sampling points and repairing quality defects efficiently by construction personnel.Field test results show that this method can accurately identify the compaction level of weak areas and effectively avoid the one-sidedness of quality qualification rate evaluation,thus improving the compaction quality fine evaluation level.