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特大桥48米箱梁预制与架设

更新时间:2010-7-31:  来源:毕业论文

特大桥48米箱梁预制与架设
中文摘要摘要:通过对黄河特大桥48m节段拼装后张法预应力混凝土双线简支箱梁在施工中的研究和应用,详细介绍了48m节段拼装后张法预应力混凝土简支箱梁的施工过程、技术控制要点及移动支架造桥机施工要点。施工现场结果表明,该技术适合中等跨度简支箱梁的施工,且技术先进、安全可靠,具有较大的推广和应用价值。
关键词:特大桥;拼装;箱梁;施工;移动支架造桥机
Yellow River special bridge 48 m boxes beam prefabricates and with erects
Abstract: Based on the Yellow River specil bridge 48m sections assembling post—tensioned prestressed concrete span box beam in construction of the Research and Application .Detail introduced 48m sections assembling post—tensioned pre-stressed concrete span box beam sconstruction process , the technical control main point and the movable-supported bridge-building equipment construction main point. It is found that this technique is not only safe and advanced but also adapt to the middle span box beam construction, which has a good application foreground and popularized value.毕业论文http://www.lwfree.cn
Key words: specil bridge; assembling; box beam; construction; movable-supported bridge-building equipment
随着新技术、新工艺、新材料和新设备的广泛应用,中国的铁路桥梁建设取得辉煌的成就,同时对今后桥梁的建设也提出了更高的要求。虽然我们在铁路桥梁修建过程中积累了丰富的施工技术经验,但是随着桥梁跨度的不断增大,对施工技术的要求越来越高,同时对桥梁施工设备也提出了更高的要求[1]。
本论文结合黄河特大桥48米节段拼装后张法预应力混凝土简支箱梁的施工过程,详尽的介绍了48米箱梁和移动支架造桥机的制作工艺流程及技术要点。采用该施工技术不仅
能克服其他传统施工工艺的缺点,还能节省工期、降低造价,相比其他施工技术具有无可比拟的优越性。
1 工程概况本文来自六^维*论-文|网包西铁路通道在包头附近越黄河,黄河特大桥位于包头市南侧,紧邻市郊,里程范围:DK14+332—DK18+222,是本线上的重要桥梁,桥梁起于黄河北大堤,跨越黄河,为满足行洪,通航(规划Ⅳ级)及跨越黄河大堤的需要,全桥孔跨布置依次为:
北岸引桥:3×32m预应力混凝土简支箱梁(跨黄河大堤)+3×32m预应力混凝土简支T梁+29×48m预应力混凝土简支箱梁。
主桥:8×108m简支钢桁梁。
南岸引桥:20×48m预应力混凝土简支箱梁+5×32m预应力简支混凝土T梁+1×48m预应力混凝土简支箱梁(跨黄河大堤)+3×32m预应力混凝土简支T梁。
包头侧台前墙里程DK14+332.89,鄂尔多斯侧台前墙里程DK18++223.00,全桥长3918.06m,全桥中心里程DK16+227.95,全桥共有72墩2台,均按双线一次建成。
    工程由中铁十九局承建。
目     录
0前言                                 1
1 工程概况                                                        1
2 预制场地设置                                                       1
3 主要设备及调配                                                  2
4 箱梁的预制                                                      2
4.1原材料                                                     2
4.2钢筋加工                                                    2
4.3模板工程                                                   7
4.4混凝土工程                                                 8
4.5梁体混凝土灌注                                            10
4.6预应力孔道成孔                                            12
4.7混凝土养护                                                13
4.8自然养护                                                  15
4.9注意事项                                                    15
4.10脱模                                                       16
4.11梁端凿毛                                                  16
4.12预制梁段施工工艺流程图                                    17
5  箱梁节段的拼装与张拉                                          17
5.1 SPZ1300/48节段拼装预应力混凝土简支箱梁造桥机构造           17
5.2运梁是的注意事项                                          18
5.3移梁                                                      19
5.4支座安装                                                  19
5.5梁片的吊装                                                20
5.6运梁车运送梁节喂梁、起重小车吊装梁节                      21
5.7安装梁节                                                  21
5.8穿预应力钢绞线                                             22
5.9湿接缝施工                                                 22
5.10孔道偏差系数、孔道摩檫系数测定                            23
5.11后张法预应力筋张拉                                        24
5.12预拱度控制                                                25
5.13孔道压浆                                                 25
5.14落梁                                                     27
6.结论                                                          27
致谢                                                            28
参考文献                                                   1475

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