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A platform for research: civil engineering, architecture and urbanism
Construction method of cast-in-place box girder crossing existing overpass
The invention discloses a construction method for a cast-in-place box girder to span an existing overpass, which comprises the following steps: step 1, a construction preparation stage, including treatment of a foundation, processing of a template and processing of reinforcing steel bars; secondly, an all-round scaffold is set up and reinforced, the scaffold is set up firstly, after the scaffold is set up, a bottom die and an outer side plate of the box girder are installed, then the scaffold is pre-pressed, after pre-pressing is completed and unloading is conducted, the elevation of the bottom die is adjusted according to the situation, and finally an inner side die and a top plate bottom die of the box girder are installed; 3, pouring of the box girder: after full-section pouring of the box girder, the box girder is maintained, tensioning is conducted when the concrete strength reaches 85% of the design strength, and finally grouting is conducted; and fourthly, the scaffold is dismantled. According to the method, the existing highway bridge is reinforced by the ring buckle type all-round scaffold, then the ring buckle type all-round scaffold is erected on the top of the existing highway bridge to serve as a cast-in-place scaffold, mounting and dismounting are convenient, and the construction period can be shortened.
本发明公开了一种现浇箱梁跨越既有立交桥施工方法，包括如下步骤：步骤一：施工准备阶段，包括地基的处理、模板的加工和钢筋的加工；步骤二：满堂脚手架的搭建和加固施工，首先搭设脚手架，在脚手架搭设完成后，安装箱梁的底模和外侧板，再对脚手架进行预压，预压完成卸载后，根据情况对底模标高进行调整，最后安装箱梁的内侧模和顶板底模；步骤三：箱梁的浇筑，全断面浇筑箱梁后，对箱梁进行养护，待待砼强度达到设计强度85％时张拉，最后进行压浆；步骤四：脚手架的拆除。本发明中盘扣式满堂脚手架加固既有公路桥梁，然后在既有公路桥梁顶部搭设盘扣式满堂脚手架作为现浇脚手架，安装和拆除均较方便，可以节约工期。
Construction method of cast-in-place box girder crossing existing overpass
The invention discloses a construction method for a cast-in-place box girder to span an existing overpass, which comprises the following steps: step 1, a construction preparation stage, including treatment of a foundation, processing of a template and processing of reinforcing steel bars; secondly, an all-round scaffold is set up and reinforced, the scaffold is set up firstly, after the scaffold is set up, a bottom die and an outer side plate of the box girder are installed, then the scaffold is pre-pressed, after pre-pressing is completed and unloading is conducted, the elevation of the bottom die is adjusted according to the situation, and finally an inner side die and a top plate bottom die of the box girder are installed; 3, pouring of the box girder: after full-section pouring of the box girder, the box girder is maintained, tensioning is conducted when the concrete strength reaches 85% of the design strength, and finally grouting is conducted; and fourthly, the scaffold is dismantled. According to the method, the existing highway bridge is reinforced by the ring buckle type all-round scaffold, then the ring buckle type all-round scaffold is erected on the top of the existing highway bridge to serve as a cast-in-place scaffold, mounting and dismounting are convenient, and the construction period can be shortened.
本发明公开了一种现浇箱梁跨越既有立交桥施工方法，包括如下步骤：步骤一：施工准备阶段，包括地基的处理、模板的加工和钢筋的加工；步骤二：满堂脚手架的搭建和加固施工，首先搭设脚手架，在脚手架搭设完成后，安装箱梁的底模和外侧板，再对脚手架进行预压，预压完成卸载后，根据情况对底模标高进行调整，最后安装箱梁的内侧模和顶板底模；步骤三：箱梁的浇筑，全断面浇筑箱梁后，对箱梁进行养护，待待砼强度达到设计强度85％时张拉，最后进行压浆；步骤四：脚手架的拆除。本发明中盘扣式满堂脚手架加固既有公路桥梁，然后在既有公路桥梁顶部搭设盘扣式满堂脚手架作为现浇脚手架，安装和拆除均较方便，可以节约工期。
Construction method of cast-in-place box girder crossing existing overpass
一种现浇箱梁跨越既有立交桥施工方法
XIE WENXIANG (author) / DAI DEYI (author) / ZHANG XIANZHE (author) / WU JIANHUA (author) / WANG SHUQI (author) / LEUNG CHUN YIP (author) / LIU YIFEI (author) / CHEN JIYAN (author) / FAN YUANPING (author) / YIN LUJUN (author)
2023-11-17
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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