滑坡地区油气管线力学效应数值模拟分析

发布时间：2018-01-18 07:06

本文关键词：滑坡地区油气管线力学效应数值模拟分析　出处：《中国地质大学(北京)》2015年硕士论文　论文类型：学位论文

【摘要】：随着经济的不断发展,各地对能源的需求与日俱增。能源的需求量与供给量之间的不平衡也导致了石油、天然气等能源的远距离运输。为了节省运输成本,保证能源补给的持续性,除了运用传统公路、铁路、水路运输外,现在广泛发展的是长线管线运输。管线对于流体的运输效率已经得到社会的广泛认可,被称为现代社会的生命线工程。由于中国地质条件比较复杂,特别是在西部地区,所以管线的长距离运输会穿越不同的地质环境。有时出于经济、施工、地形条件等因素的考虑,不可避免的要穿越滑坡、泥石流、断层等地质灾害地区。当管线穿越滑坡地区,横向与纵向穿越方式将对管线的稳定性产生重大的影响,因此研究管线的变形破坏规律有重要意义。本文利用管线的相关力学计算方法,结合ABAQUS数值模拟软件对穿越滑坡的油气管线进行了应力分析研究。本文的主要研究内容有:1、系统地回顾了国内外有关滑坡条件下的油气管线变形研究方法,介绍了几种理论计算方法和有限元数值方法。2、阐述了油气管线下滑坡的具体分类和管线变形破坏模式,考虑管线上埋土体作用、管线自身重量、滑坡时管线下方土体压力和土与管线间摩擦力等荷载,以此计算管线横向及纵向穿越滑坡状态下的应力与位移。3、采用有限元方法按接触问题进行计算,计算管线横向穿越及纵向穿越滑坡时的不同滑坡位移、不同滑坡规模下的应力应变及位移等规律。以及管线直径、厚度、周围土体材料及管线运行压力等因素对管线稳定性的影响。4、将本文中的分析方法应用到某油气管线穿越T153滑坡工程,对穿越滑坡的油气管线进行分析研究,计算并绘制管线的变形破坏曲线,为该工程选线及后期施工监测提供参考。
[Abstract]:With the development of economy, the demand for energy is increasing day by day. The imbalance between energy demand and supply also leads to long-distance transportation of oil, natural gas and other energy. In order to save transportation costs. To ensure the sustainability of energy supply, in addition to the use of traditional road, rail, waterway transport, the current extensive development is the long line pipeline transport. Pipeline for fluid transport efficiency has been widely recognized by society. It is called the lifeline project of modern society. Because of the complex geological conditions in China, especially in the western region, the long-distance transportation of pipelines will pass through different geological environments. Terrain conditions and other factors are considered, it is inevitable to pass through the landslide, debris flow, fault and other geological disasters. When the pipeline passes through the landslide area. Transverse and longitudinal crossing mode will have a great impact on the stability of pipeline, so it is very important to study the deformation and failure law of pipeline. In this paper, the related mechanics calculation method of pipeline is used. Combined with ABAQUS numerical simulation software, the stress analysis of oil and gas pipeline crossing landslide is carried out. The main research content of this paper is: 1. This paper systematically reviews the research methods of oil and gas pipeline deformation under landslide condition at home and abroad, and introduces several theoretical calculation methods and finite element numerical method .2. The specific classification and deformation failure mode of the landslide under the oil and gas pipeline are expounded, considering the action of buried soil on the pipeline, the weight of the pipeline itself, the pressure of the soil under the pipeline and the friction between the soil and the pipeline during the landslide. The stress and displacement of pipeline under the condition of transverse and longitudinal crossing landslide are calculated. The finite element method is used to calculate the displacement of different landslide when the pipeline is crossing and crossing the landslide longitudinally. The effects of stress, strain and displacement on the stability of the pipeline under different landslide scales, as well as the diameter and thickness of the pipeline, the surrounding soil material and the operating pressure of the pipeline, etc. The analysis method in this paper is applied to a certain oil and gas pipeline crossing T153 landslide project. The oil and gas pipeline passing through the landslide is analyzed and studied, and the deformation and failure curve of the pipeline is calculated and drawn. It provides reference for route selection and later construction monitoring of the project.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE973;P642.22

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