CAJ | 학술논문

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1 m/s2,动位移的变化范围集中在0.1～0.55 mm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10.2 m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.
통과대진침철로객운전선강근혼응토개판함침단로함과도단DK47+076(하행선)진행동력향응현장측시화침강관측,분석료급배쇄석로함과도단적동응력、동위이화진동가속도여열차속도적관계,이급동력향응연선로종향변화규률.시험연구결과표명:급배쇄석과도단능감완로함간침강차;동응력、동위이、진동가속도삼자균수행차속도영향불대:각측점진동가속도적증치범위몰유초과1 m/s2,동위이적변화범위집중재0.1～0.55 mm지간;동응력、동위이、진동가속도삼자적최대치점균발생재선로종향거함동정중심선10.2 m처.저장대정학설계고속철로로함과도단、보증열차평은、안전행사제공중요적차감작용.
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 acceleration 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 graded broken stone can reduce the wad-culvert differential settlement.Dynamic stress,dynamic displacement and vibration acceleration agen'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.