摘要
新建高速铁路桥梁跨越黄河大堤受到地形、防洪等条件限制,因此提出斜拉桥方案和连续梁桥方案,并对其控制性因素进行计算分析。采用斜拉桥方案时黄河大堤不设置桥墩。采用连续梁桥方案时在黄河大堤上设置桥墩,且须解决大堤渗流稳定性和抗滑稳定性问题。车桥耦合振动计算结果表明,当列车以设计速度在斜拉桥上运行时,桥梁的动力响应、列车竖向振动加速度、横向振动加速度满足规范要求;以检算速度通过时,列车的轮重减载率超限。对黄河大堤渗流稳定性进行计算分析,渗流稳定性不满足要求。通过设置截渗墙,黄河大堤渗流稳定性满足要求。在设计洪水位、设计洪水位骤降期和施工期三种计算工况下,大堤抗滑稳定性满足要求,推荐采用连续梁桥方案。
The newly built high speed railway bridge crossing the Yellow River embankment is limited by terrain,flood control and other conditions,the cable-stayed bridge scheme and continuous girder bridge scheme were proposed,and their controlling factors were calculated and analyzed in detail.When the cable-stayed bridge scheme is adopted,no piers will be installed on the Yellow River embankment.When the continuous girder bridge scheme is adopted,piers are set on the Yellow River embankment,and the problems of seepage stability and anti-sliding stability of the embankment must be solved.The calculation results of vehicle bridge coupling vibration show that when the train runs on the cable-stayed bridge at the design speed,the dynamic response of the bridge,the vertical vibration acceleration and transverse vibration acceleration of the train meet the requirements of the code.When the train passes the bridge at the checking speed,the wheel load reduction rate of the train exceeds the limit.The seepage stability of the Yellow River embankment is calculated and analyzed,and the seepage stability does not meet the requirements.The seepage stability of the Yellow River embankment meets the requirements by setting seepage cut-off wall.Under the three calculation conditions of design flood level,design flood level sudden drop period and construction period,the antisliding stability of the embankment meets the requirements,and the continuous girder bridge scheme is recommended.
作者
尹贻新
温登钦
孙洪斌
YIN Yixin;WEN Dengqin;SUN Hongbin(Jiqing High Speed Railway Co.Ltd.,Ji’nan 250014,China)
出处
《铁道建筑》
北大核心
2021年第9期34-39,共6页
Railway Engineering
关键词
高速铁路桥梁
斜拉桥
车桥耦合振动
连续梁桥
渗流稳定性
抗滑稳定性
high speed railway bridge
cable-stayed bridge
coupling vibration of vehicle and bridge
continuous girder bridge
seepage stability
anti-sliding stability
