摘要
对于大跨、大坡道和小半径曲线桥梁,梁轨相互作用关系更加复杂、附加作用力及断轨时的断缝值也较大,给桥上铺设无缝线路结构带来困难。为研究高速铁路大跨刚构-连续组合梁桥无缝线路铺设方案,以新建贵广铁路圣泉1号特大桥为工程背景,建立线-桥-墩一体化有限元计算模型,分析不同结构方案下线、桥纵向受力情况。研究结果表明:对于圣泉1号双线特大桥桥上无缝线路,铺设小阻力扣件、钢轨伸缩调节器、调节锁定轨温等常规设计方案无法同时满足强度、稳定性、断缝值等检算指标的需求,建议采取"伸缩调节器+道砟胶"的技术方案。
Laying CWR is very difficult on such bridges of long span where they are located on steep slope and small radium curve with complex rail-beam interaction,additional force and large break joint when rail is broken,and the structure of CWR usually needs to be designed on the basis of structural strength and stability. To study CWR laying program on large span continuous rigid structure bridge,this paper takes Shengquan NO. 1 double line extra large bridge of newly building Gui-Guang railway as engineering background,and an integrative line-bridge-pier calculation model is built to analyze the longitudinal force of rail and bridge in different structure programs. The result shows that as for CWR on Shengquan NO. 1 double line extra large bridge,adopting small resistance fasteners,REJ and changing locked rail temperature couldn＇t meet the demand of strength,stability and breaking joint value,so＂rail expansion joint and ballast glue＂technical program is proposed.
出处
《铁道标准设计》
北大核心
2017年第8期10-16,共7页
Railway Standard Design
基金
国家自然科学基金项目(51578053)
北京市自然科学基金委员会-北京市科学技术研究院联合资助项目(L150003)
关键词
大跨桥
小半径曲线
无缝线路
伸缩附加力
伸缩调节器
铁路桥
Large span bridge
Small radius curve bridge
CWR
Additional expansion and contraction forces
Rail expansion joint
Railway bridge
