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A platform for research: civil engineering, architecture and urbanism
Prefabricated UHPC anchoring tooth block for external prestress reinforcement and construction method
The invention discloses a prefabricated UHPC anchoring tooth block for external prestress reinforcement and a construction method, and relates to an anchoring technical means for external prestress reinforcement of an original concrete structure. External prestress reinforcement is conducted on an original structure through UHPC anchoring blocks prefabricated in a factory, and the method specifically comprises the following steps: firstly, a shearing force notch is formed in the outer wall of an original concrete bridge web, and roughening treatment is conducted; UHPC anchoring blocks are prefabricated in a factory; the prefabricated UHPC anchoring blocks are installed at the designed positions, and mortar or epoxy resin glue is smeared on shear notches and interfaces; finish-rolled threaded steel bars are arranged in a penetrating mode and tensioned for connection; and an external prestressing tendon penetrates through and is tensioned. Compared with a traditional external prestress anchoring tooth block, the prefabricated UHPC anchoring block is small in size, high in strength, simple in structure and reliable in quality; the construction speed is high, and the method is a reliable technical means for achieving external prestress reinforcement of the concrete structure.
本发明公开了一种用于体外预应力加固的预制UHPC锚固齿块及施工方法，是一种对原混凝土结构进行体外预应力加固时的锚固技术手段。利用工厂化预制的UHPC锚固块对原结构采用体外预应力加固，具体做法如下：首先在原混凝土桥腹板外壁上开剪力槽口，并作凿毛处理；在工厂预制UHPC锚固块；将预制UHPC锚固块安装至设计位置，在剪力槽口及交界面涂抹砂浆或环氧树脂胶；穿设并张拉精轧螺纹钢筋进行连接；穿设并张拉体外预应力束。相对于传统体外预应力锚固齿块，预制UHPC锚固块尺寸小、强度高、构造简单、质量可靠；施工速度快，是一种实现混凝土结构体外预应力加固的可靠技术手段。
Prefabricated UHPC anchoring tooth block for external prestress reinforcement and construction method
The invention discloses a prefabricated UHPC anchoring tooth block for external prestress reinforcement and a construction method, and relates to an anchoring technical means for external prestress reinforcement of an original concrete structure. External prestress reinforcement is conducted on an original structure through UHPC anchoring blocks prefabricated in a factory, and the method specifically comprises the following steps: firstly, a shearing force notch is formed in the outer wall of an original concrete bridge web, and roughening treatment is conducted; UHPC anchoring blocks are prefabricated in a factory; the prefabricated UHPC anchoring blocks are installed at the designed positions, and mortar or epoxy resin glue is smeared on shear notches and interfaces; finish-rolled threaded steel bars are arranged in a penetrating mode and tensioned for connection; and an external prestressing tendon penetrates through and is tensioned. Compared with a traditional external prestress anchoring tooth block, the prefabricated UHPC anchoring block is small in size, high in strength, simple in structure and reliable in quality; the construction speed is high, and the method is a reliable technical means for achieving external prestress reinforcement of the concrete structure.
本发明公开了一种用于体外预应力加固的预制UHPC锚固齿块及施工方法，是一种对原混凝土结构进行体外预应力加固时的锚固技术手段。利用工厂化预制的UHPC锚固块对原结构采用体外预应力加固，具体做法如下：首先在原混凝土桥腹板外壁上开剪力槽口，并作凿毛处理；在工厂预制UHPC锚固块；将预制UHPC锚固块安装至设计位置，在剪力槽口及交界面涂抹砂浆或环氧树脂胶；穿设并张拉精轧螺纹钢筋进行连接；穿设并张拉体外预应力束。相对于传统体外预应力锚固齿块，预制UHPC锚固块尺寸小、强度高、构造简单、质量可靠；施工速度快，是一种实现混凝土结构体外预应力加固的可靠技术手段。
Prefabricated UHPC anchoring tooth block for external prestress reinforcement and construction method
一种用于体外预应力加固的预制UHPC锚固齿块及施工方法
HE ZHIQI (author) / ZHUO WEIDING (author) / WANG JINGQUAN (author) / LIU ZHAO (author)
2020-05-15
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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