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针对格八拱坝加固工程采用后帮整体式大坝加高加厚方法,基于新老坝体结合特点,采用三维有限元法分别计算了正常蓄水位加固、死水位加固两种施工方案,分析了新老坝体应力变形状况及结合面状态,并比较了两种方案的优劣。结果表明,死水位加固方案改善了老坝应力状况,新坝坝体应力满足规范要求,且新老坝体结合面上的法向拉应力分布区域和应力值均较小,新老坝体的整体工作性态较好。因此,在格八水库加固工程施工期间,应尽量使水库保持低水位。
According to the combination of old and new dam body, two construction schemes of normal water level reinforcement and dead water level reinforcement are calculated respectively based on the three-dimensional finite element method, The stress and deformation status and interface condition of the old and new dam bodies are analyzed, and the advantages and disadvantages of the two schemes are compared. The results show that the reinforcement scheme of dead water level improves the stress state of the old dam, the stress of the new dam meets the requirements of the code, and the distribution area and the stress value of the normal tensile stress on the bonded surface between the new dam and old dam are small. The overall working attitude is better. Therefore, during the construction of the Ge-8 Reservoir Reinforcement Project, reservoirs should be kept at a low water level.