既有重载铁路隧道基底病害置换整治技术研究  

Base Diseases Replacement Remediation Technology Research of Existing Heavy Rail Tunnel

作　　者：赵海军[1] 付兵先[2] 马伟斌[2] 郭小雄[2] 

机构地区：[1]朔黄铁路发展有限公司,河北肃宁062350 [2]中国铁道科学研究院,北京100081

出　　处：《铁道建筑技术》2013年第8期23-26,共4页Railway Construction Technology

基　　金：国家科技支撑计划:轴重30吨以上煤炭运输重载铁路关键技术与核心装备研制(课题编号:2013BAG20B00)

摘　　要：利用ANSYS有限元软件建立了隧道护底翻修施工便梁三维有限元分析模型,通过设置施工便梁架设方式,并结合重载列车的荷载特点,分析了2类施工便梁在重载列车作用下的的内力特点。计算结果及施工可行性分析表明:采用下沉式便梁架空方案能够保证25 t轴重货物列车以60 km/h通过时线路轨道的几何尺寸、线路刚度和稳定性,另外,在主梁尺寸以及横梁间距设置合理的情况下,采用下沉式无水平顶丝及横梁混凝土支座方案是隧底翻修的一种理想方案,该方案对重载或普通铁路隧道基底结构的病害处理具有重要的借鉴意义。This paper uses ANSYS finite element software to establish a temporary construction beam three-dimensional finite element analysis model for tunnel bottom remediation technology.By setting the way for beam erection,and combined with heavy load of the train characteristics,the two classes temporary construction beam are analyzed under heavy haul train.Results and construction feasibility analysis show that beams overhead scheme can guarantee the track geometry and line stiffness and stability when 25 tons axle load freight trains travels by 60 km/h.In addition,in the circumstances of the main beam size and beam spacing setting reasonable,the use of no-horizontal top wire and concrete beams bearing scheme with sinking style is an ideal solution to the tunnel bottom revision,and the scheme for heavy or common rail tunnel base structure diseases treatment have an important reference value.

关 键 词：重载铁路 施工便梁 基底架空 技术研究 

分 类 号：U457[建筑科学—桥梁与隧道工程]