Suction caisson is an important new style offshore structure foundation. Its ultimate bearing capacity can be calculated approximately on the base of ultimate balance method.

吸力式沉箱是一种重要的新型海洋结构物基础，其水平承载能力可采用极限平衡法近似地估算。

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Analyzing the stability of the side slope through classical ultimate balance method, the working state is fictitious without considering the stress-strain relation of the soil mass.

采用传统的极限平衡方法来分析边坡的稳定，没有考虑土体本身的应力—应变关系，其工作状态是虚拟的。

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