重庆粉房湾长江大桥施工监控计算.pdf

学兔兔 桥梁建设 2012年第42卷第6期(总第217期) 98 Bridge Construction，Vo1．42，No．6，2012(Totally No．217) 文章编号：1003～4722(2012)06—0098一O5 重庆粉房湾长江大桥施工监控计算 江祥敏 ，蔡雄庭。 (1．浙江新晨建设有限公司，浙江杭州311200；2．中铁大桥局集团 桥科院有限公司，湖北 武汉430034) 摘 要：为了对重庆粉房湾长江大桥进行施工监控，使该桥成桥线形及内力达到设计要求，采 用MIDAS Civil有限元软件对该桥结构进行三维建模分析，计算施工过程中结构的内力及变形，并 确定斜拉索的初张拉力及成桥索力。计算结果表明：施工过程中结构线形及内力均满足规范要求， 成桥状态满足设计要求；短悬臂状态下以索力控制为主，长悬臂及合龙后以线形为主要控制因素； 双悬臂施工时严禁单侧起吊主梁。 关键词：斜拉桥；公轨两用；有限元法；施工控制 中图分类号：U448．27 文献标志码：A Calculation of C0nstructi0n Monitoring and Control of Fenfangwan Changj iang Bridge in Chongqing JIANG Xiang—min ，CAI Xiong-ting (1．Zhejiang Xinchen Construction Co．，Ltd．，Hangzhou 311200，China；2．Bridge Science Research Institute Ltd．，China Railway Major Bridge Engineering Group，Wuhan 430034，China) Abstract：To carry out the construction monitoring and control of Fenfangwan ChangJiang River Bridge in Chongqing and to make sure that the geometric shape and internal forces of the completed bridge of the bridge could meet the design requirements，the there—dimensional model for the structure was established by the finite element software MIDAS Civil and the structure was analyzed．The internal forces and deformation of the structure in the construction process were calculated and the initial tensioning forces of the stay cables and the cable forces of the corn— pleted bridge were determined．The results of the calculation show that the geometric shape and internal forces of the bridge in the