坝基析出物分析与评判

坝基析出物是否与坝基软弱夹层、断层、红层的性状恶化有关,是否危及到坝基防渗帷幕的耐久性,以及坝基是否已产生机械管涌,这些都是直接关系到坝基稳定的重大安全问题,需要通过对析出物分析后加以评价和判断。多座大坝的实践表明,对比分析、量化分析和粒度分析是析出物分析的有效方法。为了准确评判析出物对坝基的危害性,必须紧密结合坝基工程地质、水文地质条件和地下工程特点以及渗流监测资料,进行综合评价和判断。

Analysis and Evaluation on Sludge from Dam Foundation

The significant safety problems, such as whether the sludge form the dam foundation are correlated with the deterioration of the weak intercalated layer, faulty and red layer of the foundation, whether it endanger the durability of the foundation impervious curtain and whether the mechanical piping is occurred in the foundation, are directly involved with the stability of the dam foundations. All those need evaluated and judged by analyzing the sludge from the dam foundation. The practices of many dams have proved that the comparative analysis, quantitative analysis and size analysis are the effective methods for sludge analysis. It should fully consider the foundation engineering geology and hydrogeologic conditions, as well as the ground engineering characteristics and seepage monitoring data to evaluate and judge the jeopardy of the sludge from the dam foundation.