惠民砌石拱坝设计

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。

Design of the Fine-stone Concrete Masonry Arch Dam in Huimin Reservoir

In the dam site of Huimin Reservoir , geological problems in the foundation and abutments such as the fracture development , poor stability of the foundation pit slope , weak anti-scouring feature of the cobble and boulder materials , and high permeability of the foundation rocks could seriously affect the stresses and stabilities of the dam foundation and abutments.Considering the engineering geological conditions , construction difficulty , investment and benefits , a design scheme of C15 fine-stone concrete masonry arch dam is selected .According to the state design specification SL 25-2006 , an optimization design is carried out on the dam layout , and the dam crest elevation , dam stresses and deformation , and abutment stability are calculated .The results show that the distributions of the dam stresses and displacement are reason -able, and the stress states are satisfactory .The left and right abutments are of good stability as the minimum safety fac-tors meet the specification requirements .