在矩形箱格的矩形沉箱和扇形箱格之圆形沉箱的浮游稳定计算原理的基础上,对二种类型椭圆沉箱两端半圆段内不同几何形状的箱格之自身对称轴的惯性矩,经图形转轴公式和平行移动公式转换,并经数学推导得到对椭圆形沉箱纵向形心轴平行的箱格自身形心轴的惯性矩i及其之和Σi的计算式,从而解决了椭圆形沉箱浮游稳定计算的问题。 Based on the principle of stability calculation of the rectangular caissons in the rectangular box and the circular caissons in the sector box, the moment of inertia of the self-symmetric axis of the box with different geometrical shapes in the semicircular segments at the two ends of the two types of elliptical caissons is determined. The formula of the axis of rotation of the figure and the formula of parallel movement are converted and the formulas of the moment of inertia i and its sum Σi of the box’s own centroid axis parallel to the longitudinal shaped mandrel of the elliptical caissons are obtained through mathematical derivation so as to solve the problem that the elliptical caisson floats Stable calculation of the problem.