Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to the technical field of box girder prestress, in particular to a bridge box girder prestress vertical pipe grouting method, and solves the problems that in the prior art, a prestress tendon is quite sensitive to corrosion damage in a high stress state, the fracture surface of a corrosion part of the prestress tendon is damaged, and the safety and durability of a prestress concrete structure are affected. The invention relates to a grouting method for a prestressed vertical pipe of a bridge box girder. The grouting method comprises the following steps of: vacuumizing a hole channel at one end of the hole channel by using a vacuum pump before grouting so as to generate a vacuum degree of about-0.1 MPa; the vacuum pump is used for removing air and moisture in the duct to enable the inside of the duct to reach a negative pressure state, and then the grouting machine is used for injecting cement into the prestressed duct with positive pressure, so that bubbles in the duct are removed, the grouting plumpness in the duct is improved, the duct quality and the grouting quality both reach a new stage, and the construction period is shortened. And the hole channel has good sealing performance in the grouting process.
本发明涉及箱梁预应力技术领域，尤其涉及一种桥梁箱梁预应力竖管注浆方法，解决了现有技术中预应力筋在高应力状态下对腐蚀损坏相当敏感，造成预应力筋的腐蚀部位断面缺损，影响预应力混凝土结构的安全和耐久性的问题。一种桥梁箱梁预应力竖管注浆方法，包括在压浆前在孔道的一端用真空泵对孔道进行抽真空使之产生‑0.1MPa左右的真空度。利用真空泵进行清除孔道中的空气和水分，使孔道内达致负压状态，然后再用压浆机以正压力将水泥注入预应力孔道，由此排除了孔道中的气泡，提高了孔道内压浆的饱满度，使孔道质量和灌浆质量都上一个新台阶，灌浆过程中孔道具有良好的密封性。
The invention relates to the technical field of box girder prestress, in particular to a bridge box girder prestress vertical pipe grouting method, and solves the problems that in the prior art, a prestress tendon is quite sensitive to corrosion damage in a high stress state, the fracture surface of a corrosion part of the prestress tendon is damaged, and the safety and durability of a prestress concrete structure are affected. The invention relates to a grouting method for a prestressed vertical pipe of a bridge box girder. The grouting method comprises the following steps of: vacuumizing a hole channel at one end of the hole channel by using a vacuum pump before grouting so as to generate a vacuum degree of about-0.1 MPa; the vacuum pump is used for removing air and moisture in the duct to enable the inside of the duct to reach a negative pressure state, and then the grouting machine is used for injecting cement into the prestressed duct with positive pressure, so that bubbles in the duct are removed, the grouting plumpness in the duct is improved, the duct quality and the grouting quality both reach a new stage, and the construction period is shortened. And the hole channel has good sealing performance in the grouting process.
本发明涉及箱梁预应力技术领域，尤其涉及一种桥梁箱梁预应力竖管注浆方法，解决了现有技术中预应力筋在高应力状态下对腐蚀损坏相当敏感，造成预应力筋的腐蚀部位断面缺损，影响预应力混凝土结构的安全和耐久性的问题。一种桥梁箱梁预应力竖管注浆方法，包括在压浆前在孔道的一端用真空泵对孔道进行抽真空使之产生‑0.1MPa左右的真空度。利用真空泵进行清除孔道中的空气和水分，使孔道内达致负压状态，然后再用压浆机以正压力将水泥注入预应力孔道，由此排除了孔道中的气泡，提高了孔道内压浆的饱满度，使孔道质量和灌浆质量都上一个新台阶，灌浆过程中孔道具有良好的密封性。
Grouting or cushioning standpipe bases
| Engineering Index Backfile | 1916
GIRDER BRIDGE CONSTRUCTION METHOD OF PRESTRESSED GIRDER
Europäisches Patentamt | 2021
GIRDER BRIDGE CONSTRUCTION METHOD OF PRESTRESSED GIRDER
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Cast-in-place box girder bridge floor transverse prestressed duct parallel grouting method
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Prestressed concrete standpipe built in vertical panels
| Engineering Index Backfile | 1935