常州录安洲夹江管线桥主桥设计

Design of Main Bridge of Luanzhou Jiajiang River Pipeline Bridge in Changzhou

常州录安洲夹江管线桥主桥为（102＋2×180＋102）m的刚构-连续梁桥。上部结构采用单箱单室箱形梁,主梁与中主墩固结,在边主墩处设置支座。7~9号墩为主墩,采用钢筋混凝土双薄壁等截面矩形实心墩,7号、9号墩墩顶设支座,8号墩与主梁固结。6号、10号墩为过渡墩,采用等截面钢筋混凝土矩形实心墩。7号、9号墩基础为16根2.5 m钻孔灌注桩,8号墩基础为20根2.5 m钻孔灌注桩,桩长均为86 m。为验算主桥结构是否满足规范要求,采用MIDAS2006按空间梁单元建立主桥模型,进行受力分析。分析结果表明：该桥静力、抗撞及抗震验算结果均满足规范要求。

The main bridge of Luanzhou Jiajiang River Pipeline Bridge in Changzhou is a rigid-frame and continuous girder bridge with span arrangement（102＋2×180＋102） m.The superstructure of the bridge is of a single cell single box girder.At the intermediate main piers,the girder is rigidly fixed with the piers while on the side main piers,the bearings are arranged.The piers No.7~9 are the main piers,employing reinforced concrete double thin-wall rectangular solid piers of constant section,of which the pier No.7 and pier No.9 are arranged with the bearings and the pier No.8 is rigidly fixed with the girder.The pier No.6 and pier No.10 are the transition piers,employing reinforced concrete rectangular solid piers of constant section.The foundations for the pier No.7 and pier No.9 are each composed of 16 nos.of 2.5 bored piles while the foundation for the pier No.8 is composed of 20 nos.of 2.5 bored piles and the length of all these piles is 86 m.To check if the structure of the main bridge could meet the relevant requirements in the codes,the MIDAS 2006 was used to set up the model of the bridge in terms of spatial beam element and the mechanical behavior analysis was made.The results of the analysis reveal that the calculation of the static force,collision resistance and seismic resistance of the bridge can all meet the requirements.