CAJ | 학술논문

新建张唐铁路跨大秦铁路大桥上跨繁忙电气化大秦铁路，同时与铁路左右线相交，交角为45°58′。转体跨度64 m ，转体高度13～20 m ，转体重量达11000 t。为确保转体过程安全、顺利地进行，利用有限元建模分析，在转体前对转动桥梁进行了针对性称重试验，并根据试验结果进行合理配重。研究结果及工程实践表明：称重试验中，在拆除支架的过程中同时读取砂箱里土压力盒的数值，可以定量分析不平衡荷载；多点埋设的竖向位移传感器和水平向位移传感器实测数值为判断转动临界点提供了依据。配重计算中考虑正式转体时可能遭遇的风荷载，能有效防止转动失稳；试转后的二次配重能更好地确保转体过程的平稳、安全。
신건장당철로과대진철로대교상과번망전기화대진철로，동시여철로좌우선상교，교각위45°58′。전체과도64 m ，전체고도13～20 m ，전체중량체11000 t。위학보전체과정안전、순리지진행，이용유한원건모분석，재전체전대전동교량진행료침대성칭중시험，병근거시험결과진행합리배중。연구결과급공정실천표명：칭중시험중，재탁제지가적과정중동시독취사상리토압력합적수치，가이정량분석불평형하재；다점매설적수향위이전감기화수평향위이전감기실측수치위판단전동림계점제공료의거。배중계산중고필정식전체시가능조우적풍하재，능유효방지전동실은；시전후적이차배중능경호지학보전체과정적평은、안전。
A newly‐built bridge on Zhangjiakou‐Tangshan Railway that crosses the Datong‐Qinhuangdao Railway overpasses the busy electrified Datong‐Qinhuangdao Railway ,concurrently intersecting with the left and right railway lines at an angle of 45°58′.The rotated part spans 64 m ,with a height of 13~20 m and a weight up to 11 000 t .To ensure the safety and smooth opera‐tion of the rotating process ,the finite element model was established for analysis ,and the special‐ized weighting test was carried out for the bridge before the rotating operation ,and rational coun‐terweights were set according to the testing results .The results of the study and engineering prac‐tice indicate that in the weighting test ,to read the data of the soil compression box in the sand box during the demolition of the scaffolding can quantitatively analyze the unbalanced loads .T he data from the vertical and horizontal displacement sensors buried in multiple points provide reference for identifying the critical rotating point .In the counterweight calculation ,taking into account of the wind load that would encounter during the formal rotation can effectively prevent the rotation fail‐ure .The second time counterweight after the trial rotation can better ensure the stability and safe‐ty of the rotating process .