铁路客运专线路涵过渡段动力特性试验研究  

An experimental study of dynamical characteristic of road-culvert transitions in passenger-dedicated railway

作　　者：陈果元[1] 杨果林[2] 魏丽敏[2] 

机构地区：[1]中南林业科技大学建筑工程与力学学院,湖南长沙410004 [2]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2010年第1期47-51,共5页Journal of Railway Science and Engineering

基　　金：湖南省自然科学基金资助项目(09JJ6072)

摘　　要：通过对秦沈铁路客运专线钢筋混凝土盖板涵沈端路涵过渡段DK47＋076（下行线）进行动力响应现场测试和沉降观测，分析了级配碎石路涵过渡段的动应力、动位移和振动加速度与列车速度的关系，以及动力响应沿线路纵向变化规律。试验研究结果表明：级配碎石过渡段能减缓路涵间沉降差；动应力、动位移、振动加速度三者均受行车速度影响不大：各测点振动加速度的增值范围没有超过1m／s2，动位移的变化范围集中在0．1～0．55mm之间；动应力、动位移、振动加速度三者的最大值点均发生在线路纵向距涵洞顶中心线10．2m处。这将对正确设计高速铁路路涵过渡段、保证列车平稳、安全行驶提供重要的借鉴作用。Based on the site test of dynamic response and settlement observation of the road - culvert transitions with reinforced - concrete - covered culverts at DK47 ＋ 076 （ down track ） in Qin - Shen passenger dedicated railway, the relations between the dynamic stress and dynamic displacement were analyzed, vibration accelera- tion and the train speed at the road - culvert transitions were establised with graded broken stone and the longitudinal variation law of the dynamic response. The results indicate that the road - culvert transitions built with gra- ded broken stone can reduce the road - culvert differential settlement. Dynamic stress, dynamic displacement and vibration acceleration aren＇t all affected by the speed greatly, which is reflected in the acceleration below 1 m/s2 and the variation range of dynamic displacement from 0.10--0.5 mm. The maximum values of dynamic stress, dynamic displacement and vibration acceleration all occurs at the 10.2 m point from the culvert center line along the railway. This conclusion has great reference value for the correct design of the road - culvert transitions of high speed railway and security of the smooth and safe traffic.

关 键 词：路涵过渡段 级配碎石 动力响应 沉降差 

分 类 号：TU452[建筑科学—岩土工程]