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JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Civil Engineering     
Analysis and measurement on pullback force of steel pipeline during horizontal directional crossing
LI Su zhen1,2, LI Xiang1
1. Department of Building Engineering, Tongji University, Shanghai 200092, China;2. State Key Laboratory of Disaster Research in Civil Engineering, Tongji University, Shanghai 200092,China
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Abstract  

The determination of pullback force on the pipeline during installation is critical to the successful implement of pipeline crossing. The domestic and international standards regarding the calculation of pullback force were summarized and compared. The main difference among these regulations lies in the analysis of the resistances due to mud flow and pipeline large deformation. The new method was proposed based on the evaluation on the accuracy of the two resistance models in order to calculate the pullback force of a steel pipeline during horizontal directional drilling (HDD) construction. The analysis on the mechanical behavior of pipeline was conducted. A practical engineering project on the installation of a gas pipeline was employed. The proposed method accorded with the actual situation. The resistance caused by pipeline large deformation is a dominant factor contributed to the total pullback force. The pullback force increased exponentially with the increase of the transit angle due to pipeline deformation.



Published: 01 April 2016
CLC:  TU 990  
Cite this article:

LI Su zhen, LI Xiang. Analysis and measurement on pullback force of steel pipeline during horizontal directional crossing. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(4): 714-719.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2016.04.016     OR     http://www.zjujournals.com/eng/Y2016/V50/I4/714


水平定向穿越钢管回拖力的分析与实测

为了保证水平定向穿越的顺利实施,回拖力的确定至关重要.总结国内外管道回拖力计算的规范方法,针对主要区别的泥浆阻力及管道弯曲大变形阻力两部分,建立泥浆阻力模型和管道弯曲大变形阻力模型,形成更精细的回拖力计算公式,分析水平定向穿越回拖全过程的管道受力.对比某实际天然气管线工程整个回拖过程的施工监测结果表明,提出的回拖力计算方法与实际情况更吻合,管道弯曲大变形阻力占回拖力的主要部分,回拖力随管线大转角处拐角的增加呈指数增长.

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