隧道内接触网悬挂固定方式研究

Research on Suspension and Fixed Modes of Catenary in Tunnel

研究目的:隧道内接触网悬挂固定方式从高铁建设开始就一直存在争论,分析明确两种固定方式的各种性能,合理选用悬挂固定方式是高速铁路接触网设计的关键。研究结论:本文通过对预埋滑槽和后置锚栓两种接触悬挂固定方式的受力情况、零件性能、对隧道的影响、工程造价、施工方式、运营维护等多个方面的对比分析,得出:(1)预埋滑槽具有受力均匀、后期施工方便、接地可靠等优点,但工程造价高,且站前施工单位预留精度较差;(2)化学锚栓需要单独增加接地端子、调整余量小,但不受模板限制、定位灵活、施工精度可控和工程造价低;(3)结合国内的施工建设情况,建议优先采用后置锚栓的悬挂固定方式。

Research purposes： There has been the argument about suspension and fixed modes of the catenary in tunnel since building high - speed railway. The analysis of the various properties of two fixed modes and selection of the rational suspension and fixed modes are the key points for design of the catenary of high - speed railway. Research conclusions：In this paper, from the comparative analysis of two suspension and fixed modes of embedded spout and post - position anchor bolt from the areas of the load bearing situation, component properties, influence on tunnel, construction cost, construction methods, operation and maintenance, it is concluded ： （ 1 ） The embedded spout has the advantages of the even load bearing, easy construction in later stage and reliable earthing, but with the high construction cost and the poor reservation accuracy of the pre - station construction. （2） The chemical anchor bolt has advantages of the no limitation of template, flexible positioning, controllable construction accuracy and low construction cost, but needing the additional earthing terminal with small adjustment allowance. （3） Based on the construction situa- tion in China, it is recommended to give priority to using the suspension and fixed mode of post - position anchor bolt.