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较详细地叙述了刚性环的稳定性计算和填埋式地下压力钢管的最小结构壁厚的确定方法，并提出提高填埋式地下钢管弹性稳定性的措施。
The stability calculation of rigid ring and the method of determining the minimum structural wall thickness of buried pressure steel tube are described in detail, and measures to improve the elastic stability of buried steel tube are proposed.