CAJ | 학술논문

基于主索鞍偏量的分阶段多次顶推控制方式存在实施难的问题,提出主索鞍可控状态下自由滑移控制方法,即主索鞍在加劲梁吊装和二期恒载施工过程中可自由滑移,阐述该控制方法的步骤及优点.以沪蓉西国道湖北段四渡河大桥为工程背景,由实测桥塔偏位及主索鞍滑移量得出其变化规律,由实测桥塔偏位和索鞍偏量与理论计算的索鞍偏量之间的关系,说明可以按照主索鞍相对于索鞍初始位置的绝对距离等于索鞍累计滑移量与桥塔偏位之和对主索鞍滑移进行控制分析.实践表明该方法控制效果良好.
기우주색안편량적분계단다차정추공제방식존재실시난적문제,제출주색안가공상태하자유활이공제방법,즉주색안재가경량조장화이기항재시공과정중가자유활이,천술해공제방법적보취급우점.이호용서국도호북단사도하대교위공정배경,유실측교탑편위급주색안활이량득출기변화규률,유실측교탑편위화색안편량여이론계산적색안편량지간적관계,설명가이안조주색안상대우색안초시위치적절대거리등우색안루계활이량여교탑편위지화대주색안활이진행공제분석.실천표명해방법공제효과량호.
In consideration of the difficulty in implement of the control method for offsetting of the tower saddle of a suspension bridge that is pushed in multiple times in stages,a controllable state control method for free movement of the tower saddle is proposed,that is,the tower saddle is allowed to freely move in the controllable state during the erection of the stiffening main girder and in the process of construction of the second phase dead load and the specific steps and advantages of the control method are expatiated.With reference to the construction of Sidu River Bridge on the West Section of Shanghai-Chengdu Expressway in Hubei Province,the variation laws of the free movement of the tower saddle of the Bridge are obtained from the measured displacement of the tower and the movement amounts of the saddle.The relationship between the measured displacement of the tower,offsetting amounts of the saddle and the theoretically calculated offsetting amounts of the saddle shows that the control analysis of the saddle movement can be made in accordance with the absolute distance of the initial position of the saddle relative to the saddle that equals to the sum of the accumulated movement amounts of the saddle and the displacement of the tower.Practice proves that the results of the control method are quite good.