软弱地基土石坝坝基抗滑稳定计算及加固处理

抗滑稳定是软弱地基上土石坝坝基安全的关键问题之一,其抗滑稳定计算及加固处理技术也一直是学者研究的热点。以深厚覆盖层软弱地基上的仙女山水库土石坝为背景,针对软弱土层抗剪能力低、坝基深层抗滑稳定安全系数低于规范要求的问题,通过渗流和抗滑稳定计算,并进行加固措施对比分析,提出了在大坝下游坡脚设置压重体的处理措施。计算结果表明:在大坝下游设置压重体后,坝基深层抗滑稳定安全系数满足规范要求,且压重体结构简单、施工快捷,可为类似工程的坝基抗滑稳定加固处理提供借鉴。

Anti-sliding stability calculation and reinforcement treatment of earth rock dam foundation on soft ground

Anti-sliding stability is one of the key issues in the foundation safety of earth-rock dam on soft ground. The anti-sliding stabilization and reinforcement technology has been a hot topic. Taking the earth-rock dam of Xiannushan Reservoir on the soft ground with deep overburden as the background, aiming at the shear resistance of weak soil layer and lower safety factor of deep anti-slide stability of dam foundation that are blow the code requirements, the treatment measures of installing a weight body at the dam toe are put forward through seepage and anti-sliding analysis. The calculation results show that safety factor of deep anti-slide stability of dam foundation meet the code requirements and the weighting body is simple in structure and easy to construction, which can be referred in anti-sliding stability reinforcement of dam foundations.