埋地管道竖向隆起破坏研究综述∗

A Review of Research on Vertical Uplift Failure of Buried Pipelines

摘要:

埋地管道因其运输量大、安全快捷、经济高效等优点被广泛应用于水利工程、市政工程、海洋工程等领域，是能源运输的“生命线”。然而，埋地管道及其附属结构物所受的工作荷载和所处的地质条件复杂多变，使得管道容易发生竖向隆起、屈曲破坏。管道竖向隆起过程涉及复杂的管?土相互作用，掌握其变形及破坏机制对于确定管周土抗力、优化管道结构设计具有重要的意义。近年来国内外对管道隆起屈曲的变形破坏机理开展了系统研究，并探讨了影响土抗力发挥的主要因素，包括土体类型、密实度、排水条件、管径大小、管道隆升速率、管道埋置率等，并提出了土抗力简化预测模型。本文分别从管周土体破坏模式、土抗力影响因素、土抗力预测模型三个方面，评述了埋地管道竖向隆起、屈曲破坏的研究进展，并指明了该领域未来的发展方向。

Abstract:

With the advantages of large carrying capacity， continuous transportation， and economic ef? ficiency， buried pipelines， which are known as the "lifeline" for energy transmission， are widely used in many fields， such as water conservancy engineering， municipal engineering， and marine engineer? ing. However， due to the complex and changeable working loads and geological environments， the buried pipelines are prone to vertical uplift buckling failure. There are complex pipe-soil interactions in the uplift process of pipelines， and it is of great significance to master their deformation and failure mechanism to predict the uplift resistance and optimize pipeline design. Based on the study of soil de? formation and failure modes during vertical uplift buckling of pipelines， domestic and overseas schol? ars have discussed the influence factors of soil resistance， including soil type， soil compactness， drain? age conditions， pipeline diameter， uplift rate， burial rate， etc.， and have proposed corresponding pre? diction models. The state-of-the-art in the deformation mechanism of the soil around the vertical buck? ling pipeline is summarized into three aspects， i.e.， the failure modes of the soil， the influence factors of the soil resistance and the prediction model of the soil resistance， and the future development direc? tion of this field is also pointed out.