跨断陆不同角度运动的铁路路堤施工研究

S. Isaev
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摘要

本文讨论了铁路路堤穿越不同角度高地运动断层的施工问题。文中列举了在构造活动条件下隧道、桥梁、路基、管道等工程结构的应用实例。现有的监管文件建议选择一条绕过构造断层到达地面的地方的路线。然而,考虑到现有的地壳断块结构,绕过构造断裂带实际上是不可能的。现有的铁路网大部分是在没有考虑到现代要求规范的情况下铺设的。因此,在具有高地运动的构造扰动带中,对已运行轨道和拟建轨道的运行情况进行研究是有意义的。本文利用复杂的岩土工程计算软件Midas GTS,研究了在断块有条件上陆运动的水平断层中不同角度的铁路路堤作业。为此,建立了三维有限元模型。计算采用库仑-莫尔弹塑性土功模型。据此,对路基主体区域的变形进行了分析。详细考虑了变形分量及其对整体价值的贡献。得出了轴向坡度的变化和主部位横向轮廓的偏斜。对于最变形的截面,有法向和切向应力图。通过对研究结果的分析,建立了路堤应力-应变状态随轨道与断层轴夹角变化的若干特征规律。本文是作者论文研究的一部分
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of the railway embankment operation that crossing faults upland movements at different angles
The article discusses the issues of the railway embankment operation crossing faults with upland movements at different angles. Examples of the engineering structures operation are given in this article: tunnels, bridges, roadbed, pipelines in conditions of tectonic activity. Existing regulatory documents recommend choosing a route with a bypass of the places where tectonic faults reach the ground’s surface. However, taking into account the existing fault-block structure of the ground’s crust, it is practically impossible to bypass the tectonic fault zones. The existing network of railways for the most part was laid without taking into account modern requirements norms. Therefore, it seems relevant to study the operation of both the operated and the projected railway track in the tectonic disturbances zones with upland movements. In this article, using the software and computing complex Midas GTS, designed for geotechnical calculations, a study of the railway embankment operation crossing at different angles in the horizontal plane faults with conditional upland movements of the fault block has been carried out. For this, a three-dimensional finite element model was created. The calculations used the Coulomb-Mohr elastoplastic soil work model. As a result, the deformations of the embankment’s main area were analyzed. The deformations components and their contribution to the overall value are considered in detail. Conclusions are made about the change in the longitudinal slope of the axis and the skew of the transverse profile of the main site. For the most deformed sections, normal and tangential stresses diagrams. The research results analysis made it possible to establish a number of characteristic regularities in the change in the embankment’s stress-strain state, depending on the angle between the track and the fault axes. The article is part of the author’s dissertation research
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