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长输管线整体下沟技术是施工难点之一.通过模拟大变形时的挠度曲线,建立力学计算模型,对管线下沟各阶段不同状态下的应力和变形进行分析,找出最不利的受力状态,得出吊点间距、起吊高度等指导施工的关键控制参数,并成功用于实践.分析的结果可供矿浆管道、油气管道等长输管线整体下沟参考.
One of the difficulties in the construction of the long-distance pipeline is that it is one of the difficulties in construction. By simulating the deflection curve during large deformation, a mechanical calculation model is established to analyze the stress and deformation in different stages of the pipeline under the ditch and find the most unfavorable stress The key control parameters of guiding construction such as the distance between hoisting points and lifting height are obtained and successfully used in practice.The results of the analysis can be used for the reference of the lower gully pipelines such as slurry pipelines and oil and gas pipelines.