采動地表移動變形對長輸管道影響評價(jià)研究
[Abstract]:Long distance pipeline (long distance pipeline) is a linear structure. Long distance oil and gas pipeline is not only continuous transportation distance, but also has special safety requirements. As a continuous and rapid way of oil and gas transportation, long-distance oil and gas pipeline has developed rapidly in China in recent years. The laying of long distance pipeline through mining subsidence area and unmined area has become one of the important problems that must be studied and solved in long distance pipeline. In this paper, the influence of surface movement, deformation and failure caused by mining on pipeline is studied under the condition that pipeline has been laid in unmined area. On the basis of analyzing the characteristics of mining subsidence basin and the basic law of surface movement deformation, the surface movement deformation damage form is divided into three types: surface continuous movement deformation, discontinuous moving deformation and random moving deformation failure. Combined with the mechanical properties of linear structures and the basic characteristics of surface deformation under the influence of mining, the relative relationship between surface subsidence and pipelines in subsidence area is given on the basis of existing research results. The stress analysis of pipeline and the calculation method of maximum subsidence of pipeline in the process of surface movement and deformation. Based on the analysis of the main factors affecting the surface movement and deformation and the mechanical characteristics of long distance pipeline, combined with the mechanism of disaster in subsidence area, the safety evaluation index system of long distance oil and gas pipeline in subsidence area of coal mine is established. The fuzzy comprehensive evaluation model for evaluating pipeline safety reliability and the pipeline safety evaluation index are constructed. Combined with the example of Shanjing pipeline project, the fuzzy comprehensive evaluation model is used, and the results of the calculation of pipeline stress and maximum subsidence in subsidence area are compared and verified. Determine the safety level of the pipeline.
【學(xué)位授予單位】:西安科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TD325;TE832
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