长距离埋地热输管道的最大轴向力发生在锚固段内。实际上在许多当量应力超过屈服限的锚固段内并末发现明显的强度破坏现象,这表明设计强度还有潜力可挖。文献[1]提出“约束度”的新概念,意义深远。本文则通过弹性变形定量分析的基础理论,从另一方面探讨了锚固段的强度潜力问题,共同为管道设计的经济效益提供参考意见。 Long-distance buried heat pipe maximum axial force occurs in the anchor section. In fact, a significant amount of strength failure was found in many anchorage sections with equivalent stresses exceeding the yield point, indicating that there is potential for designing strength. Literature [1] proposed a new concept of “degree of restraint”, which is of far-reaching significance. Based on the basic theory of quantitative analysis of elastic deformation, this paper discusses the strength potential of anchorage section on the other hand, and provides reference for the economic benefits of pipeline design.