电缆隧道平面交叉段力学性能研究分析

发布时间：2018-02-21 18:55

本文关键词： 电缆隧道交叉段数值分析施工力学性能　出处：《石家庄铁道大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着社会的进步和经济的发展，城市电缆隧道化成为现代城市型电网的发展方向。在电缆隧道中，隧道平面交叉段的型式必然会越来越多，而且作为一种设计和施工相对复杂的结构，现阶段还缺少相应的规范和资料，本文针对这些问题做了相应的研究。本文搜集了目前交叉隧道的研究成果，介绍了国内外隧道交叉段的研究现状，并总结了隧道交叉段的设计和施工方法，为电缆隧道交叉段的设计和施工提供了参考。本文通过有限元数值模拟方法，建立了电缆隧道三(四)通柱状结构、通穹顶结构、竖井结构模型，得到了交叉隧道支护体系的内力和位移，并进行了安全系数计算，明确了结构类型的选择方案和设计方法；本文对三(四)通柱状结构和三(四)通拱套拱结构支护体系的的内力、位移及工程经济性进行了分析对比，提出了拱套拱结构和普通柱状结构的适用范围。本文应用ansys有限元软件模拟了电缆隧道三(四)通柱状结构的施工过程，，分析了三(四)通电缆隧道柱状结构和在全断面法开挖和台阶法开挖两种工况下支护结构位移情况，确定出了最合理的开挖方法，可以为类似电缆隧道交叉段的设计和施工提供借鉴。
[Abstract]:With the progress of the society and the development of economy , the urban cable tunnel becomes the development direction of the modern city type power grid . In the cable tunnel , the type of the tunnel plane crossing section will inevitably be more and more , and as a relatively complex structure of design and construction , the corresponding specifications and information are also missing at this stage , and the corresponding research is made on these problems . This paper has collected the research results of the current cross - tunnel , introduced the research situation of the cross - section of tunnel at home and abroad , summed up the design and construction method of the crossing section of the tunnel , and provided a reference for the design and construction of the crossing section of the cable tunnel . Based on the finite element numerical simulation method , the internal force and displacement of the cable tunnel three ( four ) through column structure , the pass dome structure and the vertical well structure model are established , the internal force and displacement of the cross tunnel support system are obtained , and the safety factor calculation is carried out , and the selection scheme and the design method of the structural type are specified . This paper applies ansys finite element software to simulate the construction process of three ( four ) - pass columnar structure of cable tunnel , analyzes the column structure of the three ( 4 ) - pass cable tunnel and the displacement of the support structure under the two working conditions of the excavation of the whole section method and the excavation of the step method , and determines the most reasonable excavation method , which can provide reference for the design and construction of similar cable tunnel crossing sections .

【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455

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