大跨度连续刚构桥悬臂施工工艺与质量控制.docxVIP

11 精品企业管理资料，用心整理的下载即可修改使用！ ！欢迎下载使用！！ 大跨度连续刚构桥悬臂施工工艺与质量控制 No.:00000000000003714 3 摘 要 预应力混凝土连续刚构桥以强度高、线形明快、施工简便快捷、跨越能力强的优势在大跨度桥 梁中具有广泛的应用。大跨度预应力混凝土连续刚构桥常常采用对称悬臂浇筑法施工。在悬臂施工 过程中，桥梁结构受多种因素的影响，如混凝土的收缩和徐变、设计参数与实际数值的差异、施工 误差、测量误差、温度变化等。因此采用悬臂浇筑法施工必然给桥梁结构带来非常复杂的内力和位 移变化。为了保证桥梁施工质量和桥梁建设安全，确保连续梁桥成桥后的主梁线形和结构内力符合 设计要求，使连续刚构桥的实际状态与设计状态尽可能相符，桥梁施工关键问题探析是不可缺少的。 本文在分析总结国内外大跨度预应力混凝土连续刚构桥发展和施工控制技术的基础上，对预应力连 续刚构桥的特点、施工方法进行概括介绍，对悬臂浇筑的预应力施工、 0 号块的施工、 合拢段施工 等技术及平行桁式挂篮的设计进行了研究，便于为同类型的工程提供参考。 关键词：连续刚构；0 号块的施工；悬臂浇筑；合拢段施工 12 精品企业管理资料，用心整理的下载即可修改使用！ ！欢迎下载使用！！ Cantilever span continuous rigid frame construction technology Abstract Prestressed concrete continuous rigid frame bridge with high intensity, linear crisp, simple and efficient construction, across the advantages of strong long-span bridges has a wide range of applications. Large span prestressed concrete continuous rigid frame bridge is often symmetrical Cantilever Construction Method. The cantilever construction, the bridge is affected by many factors, such as concrete shrinkage and creep, the design parameters and the actual value of the difference in construction error, measurement error, the temperature changes. So with Cantilever Construction Method for the bridge structure will inevitably bring about a very complex internal forces and displacement. To ensure the quality of bridge construction and bridge building security, ensure continuous Beam with linear and the main beam after the internal force meets the design requirements, so that continuous rigid frame bridge design of the actual state and the state as much as possible consistent with the key issue of bridge construction is not missing. This paper analyzed and summarized span prestressed concrete continuous rigid frame bridge the development and construction control technology based on prestressed continuous rigid frame bridge on the characteristics of an overview of construction methods, and prestressed