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为检验陕西省榆林市神木县采兔沟水库大坝的灌浆加固处理效果,保证水库安全运行,采用自动监测系统对泄洪洞沉降进行了长期观测,将获得的沉降观测资料估算沉降量及其发展规律以评价大坝地基稳定性。利用蠕变经验模型与指数曲线模型对大坝地基沉降进行拟合预测,分析讨论了两种模型的适用性。结果表明:蠕变经验模型预测曲线与指数曲线模型预测曲线均与原始观测数据的拟合程度接近,能较好地反映灌浆加固处理后大坝沉降的规律,两者相互印证,提高了大坝沉降预测的可靠度。
In order to test the effect of grouting reinforcement of the Caiubegou dam in Shenmu County, Yulin City, Shaanxi Province, and to ensure the safe operation of the reservoir, an automatic monitoring system was used to observe the settlement of the flood discharge tunnel for a long time. The obtained settlement observation data estimated the settlement and its development Law to evaluate dam foundation stability. The creep empirical model and exponential curve model are used to fit and predict the dam foundation settlement. The applicability of the two models is analyzed and discussed. The results show that the prediction curves of creep empirical model and exponential curve model are close to those of the original observed data, which can well reflect the law of dam settlement after grouting reinforcement. Both of them confirm each other and improve the dam Settlement prediction reliability.