单跨非对称式独塔斜拉桥施工方法和施工控制研究

发布时间：2018-01-03 10:01

本文关键词：单跨非对称式独塔斜拉桥施工方法和施工控制研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来，独塔斜拉桥以其优美的外形和良好的跨越能力，得到了广泛的应用。然而在实际施工中，施工方法和施工控制在很大程度上影响最终结构的线形、内力。因此在单跨独塔非对称式斜拉桥施工过程中有必要针对具体的工程特点进行施工优化，从而使施工控制的结果能够达到设计的预期值。本文将针对吕山大桥施工监控遇到的问题，从以下几个方面进行研究：（1）根据单跨带锚碇独塔折线斜拉桥的施工控制系统，阐述施工控制的重要性和研究现状，并提出施工控制的原则和方法，根据吕山大桥的实际监控介绍吕山大桥的施工控制系统，包括监控的目的、方法和内容。（2）介绍吕山大桥的主梁施工方法和施工过程，主梁采用挂篮悬臂施工，对挂篮做一定的计算与分析，并说明挂篮的具体施工方案；最后阐述吕山大桥的具体施工过程及方法，并说明带锚碇独塔斜拉桥的施工特点。（3）以吕山大桥施工控制过程为例，利用MIDAS/Civil有限元计算软件对成桥阶段和施工阶段进行模拟分析，主要分析施工方法不同对结构内力与变形所产生的影响；在施工阶段分析中对主梁现浇段的两种不同施工方案进行比较，分析两种方案结构的线形和内力，并得出较优的施工方案。通过对吕山大桥施工方法和施工控制研究，分析单跨带锚碇独塔折线斜拉桥分段悬臂施工过程中个参数的变化情况，并在施工阶段分析中对主梁现浇段的两种不同施工方案的计算结果进行对比分析。原方案支架现浇段长为20.53m，悬浇1#段长度为8m，比较方案支架现浇段设为24.53m，悬浇1#段长度则减为4m，其他尺寸与施工过程不变。经过两种方案的计算值与设计理论值和和实测监控数据进行对比分析，确定此支架现浇段为20.53m的施工方案优于支架现浇段为24.53m的施工方案。结果可为单跨带锚碇独塔斜拉桥折线施工控制过程和分析计算提供参考依据，对同类型独塔斜拉桥的施工过程具有较好参考意义。
[Abstract]:In recent years , the single - tower cable - stayed bridge has been widely used in its beautiful appearance and excellent crossing ability . However , in the actual construction , the construction method and construction control influence the linear and internal forces of the final structure to a great extent . Therefore , it is necessary to optimize the construction in the construction process of single - span single - tower asymmetric cable - stayed bridge , so that the result of construction control can reach the expected value of the design . In this paper , the problems encountered in construction monitoring of Lvshan Bridge will be studied from the following aspects : ( 1 ) According to the construction control system of single - span cable stayed bridge with single - span anchorage , the importance and research status of construction control are expounded , and the principles and methods of construction control are put forward . According to the actual monitoring of Lvshan Bridge , the construction control system of Lvshan Bridge is introduced , including the purpose , method and content of monitoring . ( 2 ) The construction method and construction process of the main beam of Lvshan Bridge are introduced . The main beam is constructed by hanging basket cantilever , the hanging basket is calculated and analyzed , and the concrete construction scheme of the hanging basket is explained . Finally , the concrete construction process and method of Lvshan Bridge are described , and the construction characteristics of the cable - stayed bridge with the anchor tower are explained . ( 3 ) Taking the construction control process of Lvshan Bridge as an example , using MIDAS / Civil finite element calculation software to simulate the bridge stage and the construction stage , the influence of different construction methods on the internal force and deformation of the structure is analyzed , and two different construction schemes of the cast - in - situ section of the main beam are compared in the construction phase analysis , and the linear and internal forces of the two schemes are analyzed , and the better construction scheme is obtained . Through the research on the construction method and construction control of Lvshan Bridge , the author analyzes the variation of the parameters during the construction process of the single - span cable stayed bridge with single span , and compares the results of the two different construction schemes in the cast - in - situ section of the main beam in the construction phase analysis . The comparison between the calculated value of the two schemes and the measured monitoring data shows that the cast - in - place section of the bracket is better than the construction scheme of 24.53 m in the cast - in - situ section of the bracket . The results can provide a reference for the construction control process and the analysis calculation of the single - span cable - stayed bridge with single - span anchorage , and have good reference significance for the construction process of the same type of single - tower cable - stayed bridge .

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4;U448.27

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