摘要
针对绞洞水库建坝河段两岸覆盖层及强风化层较深厚,两坝肩卸荷带岩体破碎透水性强,开挖边坡较大,可能存在风化裂隙型绕坝渗漏、坝基应力分布不均、抗滑稳定性差等不利问题,结合现场勘探成果,综合考虑工程区地形地貌、地质水文、坝基防渗及边坡开挖处理等因素,设计优选上坝址堆石混凝土重力坝方案.经设计计算,各荷载组合工况下坝体应力、地基承载力和抗滑稳定性均满足规范要求,大坝整体结构安全稳定性高.
There may be some unfavorable problems such as weathering fissure leakage around the dam,uneven stress distribution of the dam foundation and poor anti-sliding stability in view of the deep overburden and strong weathering layer on both banks of the ground hole reservoir dam section,the strong fragmentation and permeability of rock mass in the unloading zone of the two abutments and the large excavation slope.In order to solve the problems mentioned above,the scheme of rockfill concrete gravity dam at upper dam site is designed and optimized combing with the field exploration results,considering the factors such as topography,geology and hydrology,seepage control of dam foundation and slope excavation.The results show that the stress of dam body,bearing capacity of foundation and anti-sliding stability meet the requirements of specifications under various load combinations,and the overall structure of the dam has high safety and stability.
出处
《吉林水利》
2019年第8期9-13,共5页
Jilin Water Resources
关键词
堆石混凝土重力坝
建坝河段
坝型比选
绞洞水库
rockfill concrete gravity dam
bank of the reservoir
type selection of the dam
ground hole reservoir
