中文摘要：

对于沉入式大直径圆筒旋转点的确定,一直以来都没有精确的理论方法。提出垂直平分线法求大圆筒旋转点,通过有限差分软件模拟圆筒在水平荷载作用下的倾覆,由转动前后的模型定位寻找其倾覆旋转点。分析其倾覆转动点随不同控制参数如圆筒直径、圆筒埋深及作用荷载的变化规律,并同工程上使用的汉森转动极值法进行比较。通过分析比较得出,垂直平分线法能够体现多种不同参数控制下的旋转点的发展趋势,是一种比汉森极值法更为实用的方法。

英文摘要：

Till now there isn＇t an accurate theoretical method to determine the rotation center of the embedded large-diameter cylinder.Using infinite difference software to simulate the overturning of the cylinder under horizontal loads,we get the rotation center by analysis the model position before and after rotation.Based on the analysis of the change pattern of the rotation center with different parameters and through the comparison with the existed method named Hansen,we can get the conclusion that the new method can perfectly reflect the trend of the development of the rotation center under different parameters,thus it＇s much more practical than Hansen.