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针对惠民水库存在坝址区裂隙发育、基坑边坡稳定性较差、卵漂石抗冲性较弱、岩体透水性强,对坝基、拱座受力和稳定性不利的问题,经现场勘探,考虑工程区的工程地质、施工难度及投资效益等因素,优选C15细石混凝土砌石拱坝坝型。结合SL25-2006砌石拱坝设计规范,对拱坝枢纽布置方案进行了适当的优化调整,并对坝顶高程、坝体应力变形、拱座稳定性等进行了详细计算分析。结果表明:拱坝应力、位移分布规律合理;拱座左、右岸整体稳定最小安全系数,满足规范要求;坝体应力状态和拱座整体稳定性较好。
In view of the problems of fracture development in the dam site area of Huimin Reservoir, poor stability of the foundation pit slope, weak impact resistance of the opal bleaching stone, strong permeability of the rock mass, unfavorable stress and stability on the dam foundation and the abutment, Site exploration, considering the project area engineering geology, construction difficulty and investment efficiency and other factors, preferably C15 fine stone masonry dam arch dam. Combined with the design specifications of SL25-2006 masonry arch dam, the layout of the arch dam is optimized and adjusted properly, and the crest elevation, the stress and deformation of the dam and the stability of the abutment are calculated and analyzed in detail. The results show that the distribution of stress and displacement of arch dam is reasonable, the minimum safety factor of the whole left and right bank of arch abutment meets the requirements of the code, and the stress state of dam and the overall stability of abutment are good.