大跨径预应力连续刚构桥梁竖向变形施工监控  

Vertical Deformation Construction Control of Long Span Prestressed Continuous Rigid Frame bridges

作　　者：姚敏红 马保林[2] 崔平如 

机构地区：[1]西安公路研究院,陕西西安710054 [2]陕西省公路勘察设计院,陕西西安710068

出　　处：《公路工程》2010年第4期132-136,共5页Highway Engineering

摘　　要：桥梁施工监控的主要目的是使施工实际状态最大限度地与理想设计状态(线形与受力)相吻合,采用线性最小方差估计法,识别施工中系统参数,利用识别的参数预报合龙时的变形。将此变形加上二期恒载和后期徐变的作用,给出当前梁块的立模高程,以期达到最优控制。给出了施工监控中计算的相关公式及测试结果,推断出刚构桥竖向变形施工监控采用的计算方法-线性最小方差估计的可行性,提出了此类桥梁竖向变形施工监控的理论和计算方法。The purpose of bridge construction control is to make the alignment and force of real construction condition in the best coincidence with the design.this literary use line minimum square bad estimate method to identify under construction system parameter,make use of discriminating parameter forecast transform in gather together.Simultaneity consider the transform and function of second permanent load and creep,give current mold elevation of beam piece,to the effect that attain superior control.The related formula and test result of construction control calculation is improved in the article,conclude the possibility of adoption Rigid Frame bridge vertical distortion construction control calculation method-line minimum square bad estimate,putting forward sequentially theories and calculation method of this kind bridge vertical distortion construction control.

关 键 词：连续刚构桥梁 施工控制 竖向变形 线性最小方差估计 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]