超大倾角多维曲面深水Y形墩关键施工技术
|
摘要
蓟汕高速公路工程海河特大桥全长1 210.328m,其主桥为(70+110+70)m连续钢箱梁桥。主桥20号和21号墩墩柱采用预应力混凝土Y形墩柱,顺桥向成Y形,横向与道路中心线的法线方向成22°角斜向布置。Y形墩墩顶设整体板式系梁连接两斜腿,单个墩柱混凝土方量达3 688.5m·3。Y形墩柱两斜肢腿采用斜拉支撑体系平衡塔架法施工,主墩采用分段浇筑施工技术,并采用BIM技术对墩柱异型分块钢模板试拼装进行前期施工模拟,有效解决了施工条件的局限性以及施工过程中钢模板与斜拉体系平衡塔架的碰撞冲突风险,按期完成了Y形墩柱施工,主墩线形流畅,根部未产生开裂现象。
The Haihe Bridge on the Jishan Expressway has a full length of 1 210.328 m,the main bridge of which is a continuous steel box girder beam bridge with span arrangement of 70m+110m+70 m.The columns of the piers No.20 and No.21 are the Y-form prestressed concrete structures,being Y shape longitudinally and forming an angle of 22°with the normal direction of the carriageway center line transversely.The integral plate-type tie beam is installed on the top of the Y-shaped pier to connect the two inclined columns,and a single pier column uses concrete of 3 688.5m~3.The two inclined columns of the pier were constructed by using the balanced lifting frames supported by cable-stayed system.The main pier was cast in sections.And the BIM system was used to model the initial construction of the trial assembly of the abnormal steel formwork of the pier columns,effectively solving the problem of the limitation of the construction condition and the risk of collision of the steel formwork and the lifting frames during the construction process.The construction of the Y-shaped columns was completed on time.The geometrical shape of the main pier looks sleek,and no cracks were observed on the roots of the columns.
The Haihe Bridge on the Jishan Expressway has a full length of 1 210.328 m,the main bridge of which is a continuous steel box girder beam bridge with span arrangement of 70m+110m+70 m.The columns of the piers No.20 and No.21 are the Y-form prestressed concrete structures,being Y shape longitudinally and forming an angle of 22°with the normal direction of the carriageway center line transversely.The integral plate-type tie beam is installed on the top of the Y-shaped pier to connect the two inclined columns,and a single pier column uses concrete of 3 688.5m~3.The two inclined columns of the pier were constructed by using the balanced lifting frames supported by cable-stayed system.The main pier was cast in sections.And the BIM system was used to model the initial construction of the trial assembly of the abnormal steel formwork of the pier columns,effectively solving the problem of the limitation of the construction condition and the risk of collision of the steel formwork and the lifting frames during the construction process.The construction of the Y-shaped columns was completed on time.The geometrical shape of the main pier looks sleek,and no cracks were observed on the roots of the columns.
引文
[1]章征,王凯,李毓龙,等.混凝土桥墩施工期水化热及表面抗裂影响因素研究[J].桥梁建设,2015,45(2):65-70.
[2]陈思孝,陈克坚,李锐.A形高墩大跨度混凝土连续刚构桥设计技术研究[J].桥梁建设,2014,44(1):63-68.
[3]申永利.裸岩河床水中墩基础施工技术[J].世界桥梁,2016,44(2):16-19.
[4]石丰祥,高璞,周俊龙,等.大角度Y形墩柱施工支撑体系研究[J].天津建设科技,2015(1):73-74.
[5]许鹏飞.异形墩柱模板设计与制作[J].铁道建筑技术,2014(10):19-20,25.
[6]张敏,何伦杰.矮Y形墩连续刚构桥的设计与施工[J].公路与汽运,2014(4):160-163.
[7]朱光华.V墩钢构连续梁桥超宽钢箱梁架设关键技术[J].工程技术(引文版),2017(4):137-139.
[8]裴建.桥梁高墩柱施工技术[J].中国公路,2016(23):132-133.
[9]安忠强.大跨度异型墩柱工艺探讨及质量控制[J].建设监理,2016(8):61-63.
[10]JTG/T F50-2011,公路桥涵施工技术规范[S].
[2]陈思孝,陈克坚,李锐.A形高墩大跨度混凝土连续刚构桥设计技术研究[J].桥梁建设,2014,44(1):63-68.
[3]申永利.裸岩河床水中墩基础施工技术[J].世界桥梁,2016,44(2):16-19.
[4]石丰祥,高璞,周俊龙,等.大角度Y形墩柱施工支撑体系研究[J].天津建设科技,2015(1):73-74.
[5]许鹏飞.异形墩柱模板设计与制作[J].铁道建筑技术,2014(10):19-20,25.
[6]张敏,何伦杰.矮Y形墩连续刚构桥的设计与施工[J].公路与汽运,2014(4):160-163.
[7]朱光华.V墩钢构连续梁桥超宽钢箱梁架设关键技术[J].工程技术(引文版),2017(4):137-139.
[8]裴建.桥梁高墩柱施工技术[J].中国公路,2016(23):132-133.
[9]安忠强.大跨度异型墩柱工艺探讨及质量控制[J].建设监理,2016(8):61-63.
[10]JTG/T F50-2011,公路桥涵施工技术规范[S].