The invention relates to the technical field of bridge construction and in particular relates to an arch foot positioning device and a positioning method of same. The arch foot positioning device comprises pedestals and supporting plates, wherein supporting plates are arranged on each pedestal; an included angle between each supporting plate and the horizontal surface is equal to an included angle of a rod member of an arch foot pre-buried section and the horizontal surface; the supporting plates are applied for the arch foot pre-buried section; and the pedestal is fixed on a preserved notch of an arch support. In the arch foot positioning device and the positioning method of the same, the supporting plates are mounted on the pedestal, so an inclined angle of the supporting plates is equal to an inclined angle of a rod member of the arch foot pre-buried section; when the arch foot pre-buried section is installed by a construction worker, the pedestal and the supporting plates are first arranged on the preserved notch, and then the arch foot pre-buried section is placed on the supporting plates and positioned; positioning difficulty and construction difficulty can be lowered; and construction cost can be reduced.

Arch foot positioning device and positioning method of same

A stiff support for mounting arch feet of a concrete-filled steel tube arch rib bridge comprises a first portal frame, a second portal frame, connecting longitudinal beams, front distribution beams and tail distribution beams. The first portal frame and the second portal frame are connectedly fixed through the connecting longitudinal beams, the front distribution beams, the tail distribution beams and the connecting longitudinal beams are positioned on a same plane and identical in arrangement direction, a first elevation adjusting block and a second elevation adjusting block are arranged above the first portal frame and the second portal frame respectively, and the arch feet are mounted at the upper ends of the first elevation adjusting block and the second adjusting block of the stiff support. Components of the stiff support are connected by welding, so that integral stiffness stability of structure can be guaranteed, and working efficiency can be improved. The stiff support is stable in mechanical structure, simple to assemble and manufacture and construction material saving, a technical basis is provided for improving safety in bridge construction, and the stiff support is highly applicable to the field of mounting arch ribs of the concrete-filled steel tube arch bridge in China and can generate huge economic benefit and social benefit after being popularized and applied.

Stiff support for mounting arch feet of concrete-filled steel tube arch rib bridge

The invention relates to a positioning structure for an arch support and a steel tube of a through concrete-filled steel tube bowstring arch bridge and a construction method thereof. An arch support arching rigidity framework is used for replacing an arch zone complex distributed steel; a mechanical device for accurately positioning an arch axis is arranged; a whole steel box, section bars and rebars are assembled into the arch support arching rigidity framework through node plates; the forces transferred by bowstring rods, end cross beams and arch ribs are endured by the arch support arching rigidity framework; the positioning devices are arranged on the arch support arching rigidity framework and are respectively located at the tail end of the steel tube and an interface joint of the steel tube and the arch support; the direction and elevation of the steel tube are changed by adjusting the bolt.

Positioning structure for arch support and steel tube of through concrete-filled steel tube bowstring arch bridge and construction method thereof

The invention discloses a steel box arch bridge arch foot steel-concrete combined section installing positioning support and an alignment method. The support is used for installing and alignment of asteel-concrete combined section and arch foot concrete; the wall, for alignment and installation, of the arch foot concrete is an abut-joint face, the side wall below the abut-joint face is a supporting face, and the transverse bridge two side walls are limiting faces; the positioning support comprises a supporting truss set and two lateral limiting trusses; the supporting truss set comprises a plurality of supporting trusses, each supporting truss is provided with a supporting section and an installing section, and each supporting section is provided with a sliding way for bearing the steel-concrete combined section; the positioning support has the installing state. When the positioning support is in the installing state, the multiple supporting trusses are arranged in the transverse bridge direction at intervals, and the installing section is fixed to the supporting face; the bottom ends of the two lateral limiting trusses are fixed to the two limiting faces, and the top ends of thetwo lateral limiting trusses, the abut-joint face and the supporting section form a space for sliding the steel-concrete combined section. The positioning support is simple in structure, when the support is in use, the support is directly installed on arch foot concrete, and the assembling and disassembling procedures are simple.

Steel box arch bridge arch foot steel-concrete combined section installing positioning support and alignment method

The invention discloses an anti-shock bracket for a large-span space vertical steel structure, which comprises a steel corbel, a first double-faced channel steel, a second double-faced channel steel, a third double-faced channel steel, a fourth double-faced channel steel, a first vertical channel steel, a second vertical channel steel and a cross channel steel; one end of the steel corbel is connected with the vertical steel structure, and the other end extends towards the direction far from the vertical steel structure; the first double-faced channel steel and the second double-faced channel steel are connected to the upper end face of the steel corbel through a steel girder clip; the third double-faced channel steel and the fourth double-faced channel steel are connected to the lower end face of the steel corbel through the steel girder clip; the top part of the first vertical channel steel is connected with the first double-faced channel steel and the third double-faced channel steel, and the top part of the second vertical channel steel is connected with the second double-faced channel steel and the fourth double-faced channel steel. The anti-shock bracket can average the vertical supporting force and disperse the node stress; finally, the service life of the anti-shock bracket is guaranteed.

Anti-shock bracket for large-span space vertical steel structure

A stiffness supporting for mounting concrete filled steel tube arch rib bridge arch feet comprises a first portal, a second portal, connecting longitudinal beams, a front distributive girder and a tail distributive girder, wherein the first portal and the second portal are connected and fixed through the connecting longitudinal beams, the front distributive girder, the tail distributive girder and the connecting longitudinal beams are located on the same plane and identical in arranging direction, a first elevation adjusting block and a second elevation adjusting block are arranged on the upper portion of the first portal and the upper portion of the second portal respectively, and the arc feet are mounted at the upper end of the first elevation adjusting block and the upper end of the second elevation adjusting block of the stiffness support All components of the stiffness support are connected in a welded mode, overall rigidity and stability of the structure can be guaranteed, and work efficiency is improved; the stiffness support is stable in mechanical structure and easy to assemble and manufacture, saves construction materials, provides technical basis for improvement of bridge building safety, has high adaptability in the field of domestic concrete filled steel tube arch bridge arch rib installation, and can generate great economical and social benefits after being applied and popularized

Wang Baoji

Papers

Stiff support for mounting arch feet of concrete-filled steel tube arch rib bridge

Stiffness support for mounting concrete filled steel tube arch rib bridge arch feet