针对梅山连拱坝3#垛和12#垛侧向位移过大的现象，根据原型观测资料，应用时空分析、数值模型、结构计算等多种方法，并从地形条件及坝体结构等多个角度进行综合分析，认为温度荷载、地形及坝体结构相互间的综合作用是导致3#垛和12#垛侧向位移过大的原因。
Abstract:

Aiming at the over-size of lateral displacement of buttress No.3 and buttress No.12 in Meishan multiple arch dam, on the basis of observation data, the methods such as time-space analysis, numerical model, and structural calculation were applied to analyze the cause quantitatively from the topography and the structure of dam body.It can be concluded that the over-size of lateral displacement of buttress No.3 and buttress No.12 is the results of interaction of temperature load, the topography and the structure of dam body.