大直径承插式钢顶管的施工受力变形测试分析——以厦门高集海堤原水管道迁改工程为例

发布时间：2018-04-27 11:56

本文选题：钢顶管 + 承插式接头　；参考：《隧道建设》2017年05期

【摘要】：承插式钢顶管可以实现大曲率顶进,但管节间的相对转动对接头和管身的影响机制却未得到系统研究。为研究大直径承插式钢顶管在顶进轴线调整过程中的受力变形特性,本文通过现场测试,详细记录了海底大直径钢顶管在顶进过程中承插式接头的测缝、径向变形和纵环向应力。结果表明,承插式接头可以适应大直径钢顶管的轴线偏转要求,管节间最大相对偏转角较规范允许的焊接式钢顶管最大偏转角增大了近19倍。在曲线顶进时,承插式钢顶管自身径向变形的调整可有效降低接头处的应力水平,且管节间由偏转产生的附加应力有限。
[Abstract]:The large curvature jacking can be realized in the steel jacking pipe, but the influence mechanism of the relative rotation of the pipe joints on the joints and the pipe body has not been systematically studied. In order to study the mechanical and deformation characteristics of large diameter steel jacking pipe in the process of jacking axis adjustment, this paper, through field tests, records in detail the measuring joints of the socket type joint during the jacking process of large diameter steel jacking pipe. Radial deformation and longitudinal toroidal stress. The results show that the socket joint can meet the axial deflection requirement of large diameter steel jacking pipe, and the maximum relative deflection angle between pipe joints is nearly 19 times higher than that of welded steel jacking pipe permitted by the specification. When the curve is pushed forward, the adjustment of the radial deformation of the steel jacking pipe can effectively reduce the stress level at the joint, and the additional stress caused by the deflection between the pipe joints is limited.
【作者单位】：上海交通大学土木工程系;海洋工程国家重点实验室;
【基金】：国家自然科学重点基金项目(41330633) 国家自然科学基金项目(51678360)
【分类号】：TV672.2

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