【作者】 刘建瑞；

【导师】 胡隽；

【作者基本信息】 华中科技大学 ， 桥梁与隧道工程， 2006， 硕士

【摘要】 随着交通事业和科学技术的快速发展,我国修建了更多的大跨度桥梁以跨越江河海峡等。此时若仍然采用有支架的施工方法,将变得非常困难甚至不可能。大跨度连续刚构桥的施工采用自架设悬臂施工法,其施工难度大,促进了大跨度连续刚构桥的建设的同时又在施工中带来了许多问题。大跨度桥梁的施工要经历一个复杂的过程,在此过程中将受到许多确定和不确定因素的影响,导致桥梁结构的实际状态偏离理论计算分析状态。因此桥梁施工控制的重点就是通过对施工过程中出现的偏差进行分析识别,发现问题并及时进行纠偏,同时对结构的后续阶段由最近的识别参数进行分析,预测最新的理想目标线形,使施工系统始终处于控制之中。十堰市将军河汉江大桥为61+110+110+61m四跨预应力混凝土连续刚构桥,该桥采用节段式悬浇施工法,其成桥后的内力和线形是本桥施工控制的两个目标。本文针对十堰市将军河汉江大桥的实际施工控制过程,参阅现有的施工控制研究成果,研究影响节段施工位移的因素,依据自适应控制原理及最小二乘法,提出施工控制中的一种切实有效的参数识别方法并给出实际的计算过程,同时提出消除温度挠度影响的有效实用方法。对大桥的结构建模过程,计算方法,施工控制系统,施工控制的各种相关参数,最小二乘法等的内容进行了论述及说明。更多还原

【Abstract】 With the development of science and technology and traffic enterprise more and more long-span prestressed continuous rigid frame bridges are constructed to span wide river and straits.It is difficult and impossible to buid them with bracket as before.Long-span continuous rigid frame bridges are always built by cantilevered construction techniques , and the process is difficult. It promotes the construction and bring back many problems.The constuction of long-span continuous rigid frame bridges needs a complex process. It will be affected by many certain and uncertain factores. The actual construction state of the bridges might deviate from the state of the theoretical design.Therefore,the bridge construction control emphasizes the problem-finding out and error-adjusting in time and analyse the following state by the latest new parameters and predict the most ideal line shape,so as to guarantee the construction system under control.The Shiyan Jiangjun Rver Bridge is a 61+110+110+61m, four-span, prestressed continuous rigid frame bridges.It is built by cantilevered construction techniques.The line shape and force of the bridge is the two large targets of the construction control.I attended the construction control of the Shiyan Jiangjun River bridge,consulted many achievements of construction control and studied the factors that affect the displacement of box girder bridge through the construction.This Thesis bring forward an actual parameter identify method and give out calculating process according to self-adapted theory and the least-squarcs method. This thesis also bring forward an actual method that could eliminate the influence of displacement of temperature. The thesis discusses the modeling process, calculating method, parameters interrelated in the construction control and the least-squarcs method etc.更多还原