猫鼻子水库扩建工程大坝加高培厚设计分析

Design and Analysis of Heightening and Thickening of Dam for Maobizi Reservoir Expansion Project

猫鼻子水库大坝加高扩建工程中,结合现场勘探成果,综合考虑大坝结构现状、坝体填筑材料、坝基肩防渗体等因素,论证优选坝址原坝址加高扩建混凝土防渗墙方案。经大坝渗流及坝坡稳定性分析,各荷载组合工况下坝体渗透比降小于规范值,坝坡稳定安全系数大于规范值。加高扩建后,大坝坝体渗流性态好,坝坡安全稳定,为工程高效优质施工提供了重要技术保障。

In the project of dam heightening and expansion of Maobizi Reservoir,this paper demonstrates and optimizes the scheme of heightening and expanding concrete cut-off wall at the original dam site in combination with on-site exploration results,taking into account the current situation of dam structure,filling materials of dam body,seepage-proof body of dam abutment and other factors.According to the analysis of dam seepage and dam slope stability,the ratio drop of dam body seepage under each load combination condition is less than the specification value,and the safety factor of dam slope stability is greater than the specification value.After heightening and expansion,the dam body has good seepage behavior and dam slope is safe and stable,which provides important technical guarantee for high-efficiency and quality construction of the project.