高速公路C50连续梁施工质量控制
发布时间：2018-11-20 05:35
【摘要】：高速公路的不断修建,现浇连续梁得到了快速发展和广泛应用,并以其施工工艺简单、结构受力合理等优点,成为了高速公路桥梁的一种非常重要的建筑形式。由中铁十九局集团有限公司承建的广州增城至从化高速公路S13标双凤互通A匝道桥设计为预应力混凝土连续梁桥。根据图纸和施工现场的要求,针对该桥上部结构梁体施工编制了专项施工方案,确定搭设满堂支架进行上部梁体预应力连续梁现浇施工,施工后取得了较好的质量和外观效果。为确保C50预应力混凝土现浇连续梁施工工艺的实施和连续梁施工整体质量得到有效控制。根据质量控制要求和验收标准要求,本文通过研究和工程实践得出:(1)利用工字钢和碗扣式脚手架搭设满堂支架,在支架上拼装模板并对其进行预压并调整底模标高,钢筋加工及预应力筋安装布设,混凝土浇筑、预应力筋张拉、封锚注浆、模板支架拆除完成现浇连续梁的施工。(2)对施工过程每个环节中每道工序对现浇梁的质量控制都非常关键,为保证各工序的正常进行,采取了一系列相关的措施。(3)支架搭设、模板拼装、钢筋加工及安装、混凝土浇筑、预应力张拉、孔道压浆与封端是施工质量控制的重点。因此,只有严格控制这些工序才能建造出外观完美、质量达标的连续梁桥。
[Abstract]:With the continuous construction of freeway, cast-in-place continuous beam has been rapidly developed and widely used, and it has become a very important building form of expressway bridge because of its simple construction technology and reasonable structural force. The A ramp bridge of Shuangfeng Interchange between Guangzhou Zengcheng and Conghua Expressway S13 is designed as a prestressed concrete continuous beam bridge built by China Railway Nineteenth Bureau Group Co., Ltd. According to the drawing and the requirements of the construction site, a special construction plan is worked out for the construction of the superstructure beam body of the bridge, and it is determined to set up a full hall support for the cast-in-situ construction of the prestressed continuous beam of the upper beam body. After the construction, the better quality and appearance effect have been obtained. In order to ensure the implementation of C50 prestressed concrete cast-in-situ continuous beam construction technology and the overall quality of continuous beam construction is effectively controlled. According to the requirements of quality control and acceptance standard, the following conclusions are obtained through research and engineering practice: (1) using I-shaped steel and bowl-buttoned scaffold to set up the full hall support, assembling the template on the bracket, prepressing it and adjusting the elevation of the bottom mould, Processing of steel bars and installation and placement of prestressed tendons, concrete pouring, tensioning of prestressing tendons, grouting of sealing anchors, The formwork support is removed to complete the construction of cast-in-place continuous beam. (2) the quality control of cast-in-place beam is very important to every working procedure in the construction process, in order to ensure the normal progress of each process, A series of relevant measures have been taken. (3) the key points of construction quality control are support erection, formwork assembly, steel bar processing and installation, concrete pouring, prestressing tensioning, hole grouting and sealing end. Therefore, only by strictly controlling these processes can a continuous beam bridge with perfect appearance and quality standard be built.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4
本文编号：2343926
[Abstract]:With the continuous construction of freeway, cast-in-place continuous beam has been rapidly developed and widely used, and it has become a very important building form of expressway bridge because of its simple construction technology and reasonable structural force. The A ramp bridge of Shuangfeng Interchange between Guangzhou Zengcheng and Conghua Expressway S13 is designed as a prestressed concrete continuous beam bridge built by China Railway Nineteenth Bureau Group Co., Ltd. According to the drawing and the requirements of the construction site, a special construction plan is worked out for the construction of the superstructure beam body of the bridge, and it is determined to set up a full hall support for the cast-in-situ construction of the prestressed continuous beam of the upper beam body. After the construction, the better quality and appearance effect have been obtained. In order to ensure the implementation of C50 prestressed concrete cast-in-situ continuous beam construction technology and the overall quality of continuous beam construction is effectively controlled. According to the requirements of quality control and acceptance standard, the following conclusions are obtained through research and engineering practice: (1) using I-shaped steel and bowl-buttoned scaffold to set up the full hall support, assembling the template on the bracket, prepressing it and adjusting the elevation of the bottom mould, Processing of steel bars and installation and placement of prestressed tendons, concrete pouring, tensioning of prestressing tendons, grouting of sealing anchors, The formwork support is removed to complete the construction of cast-in-place continuous beam. (2) the quality control of cast-in-place beam is very important to every working procedure in the construction process, in order to ensure the normal progress of each process, A series of relevant measures have been taken. (3) the key points of construction quality control are support erection, formwork assembly, steel bar processing and installation, concrete pouring, prestressing tensioning, hole grouting and sealing end. Therefore, only by strictly controlling these processes can a continuous beam bridge with perfect appearance and quality standard be built.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4
【参考文献】
相关期刊论文 前1条
1 胡其志;庄心善;李玲玉;;预应力混凝土连续箱梁桥施工监控[J];北方交通;2010年11期
，本文编号：2343926
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