混凝土自锚式悬索桥施工控制  

Construction control of concrete self-anchored suspension bridge

作　　者：苗通[1] 戴杰[2] 秦凤江[3,4] 陈永瑞[2] 马静[2] MIAO Tong;DAI Jie;QIN Feng-jiang;CHEN Yong-rui;MA Jing(Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510010, China;School of Highway, Chang'an University, Xi'an 710064, China;Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400044, China;School of Civil Engineering, Chongqing University, Chongqing 400044, China)

机构地区：[1]广州地铁设计研究院有限公司,广东广州510010 [2]长安大学公路学院,陕西西安710064 [3]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400044 [4]重庆大学土木工程学院,重庆400044

出　　处：《河南城建学院学报》2019年第2期45-55,共11页Journal of Henan University of Urban Construction

基　　金：国家自然科学基金项目(51608069);中央高校基本科研业务费专项资金项目(310821171020,310821171019,310821171011,106112016CDJXY200002)

摘　　要：为保证混凝土自锚式悬索桥各个构件的受力和变形在施工过程中的安全与合理,以主梁、桥塔、主缆线形和吊索无应力长度为主要控制参数,兼顾结构应力和吊索索力,并在对混凝土自锚式悬索桥进行平衡状态分析、施工全过程倒拆-正装分析的前提下,采用无应力几何控制法对某混凝土自锚式悬索桥进行施工全过程控制。研究结果表明:采用该方法控制后,混凝土自锚式悬索桥在施工过程中结构安全,误差在容许范围内;成桥状态下主梁和主缆线形较平顺,桥塔基本处于竖直状态,实测数据与理论分析结果吻合良好;吊索索力分布均匀,且安全系数均大于3;主梁和桥塔均处于全截面受压状态,具备一定的安全储备;无应力几何控制法中的控制参数直观性强,便于计算且操作简单,能够适用于混凝土自锚式悬索桥的施工控制中。In order to ensure the safety and rationality of stress and deformation of each member of concrete self-anchored suspension bridge during construction process. The structural stress and hanger force were also taken into account. On the premise of equilibrium state analysis and dismantiling-formal analysis for concrete self-anchored suspension bridge, the whole construction process control of a concrete self-anchored suspension bridge was conducted through unstressed geometric control method. The research results show that after controlled by this method, the structure is safe during the construction process and the errors are all within the allowable ranges. Under the completed bridge state, the alignment of main beam and main cable are smooth, and the pylon is in a vertical state. The measured data are in good agreement with the theoretical analysis. The cable force distribution is uniform, and the safety factor is more than 3. The main beam and pylon are all under the state of full section compression, and have certain safety reserves. The control parameters of unstressed geometric control method are intuitionistic, and easy to calculate and operate during the control process. It can be applied to the construction control of concrete self-anchored suspension bridge.

关 键 词：桥梁工程 混凝土自锚式悬索桥 施工控制 有限元法 无应力状态 

分 类 号：U448[建筑科学—桥梁与隧道工程]