CN102619174B - Large-span continuous steel truss girder arch pushing device - Google Patents

Abstract

The invention discloses a large-span continuous steel truss girder belt arch jacking device, which includes a sliding device and a main pushing system device. The sliding device includes left and right longitudinal slideway beams and sliders. The inner edge of the longitudinal slideway beam on the right side is respectively provided with longitudinal full-length limit stops, the inner wall of the slider is placed on the longitudinal full-length limit stop, and the outer side of the slide block is provided with a deviation correction device, which is divided into Tracking deviation correction device, fixed deviation correction device, the ends of multiple horizontal traction cables drawn from the horizontal continuous jacking jack are fixedly connected to the C-type reaction force seat, and the piston rod of the jacking jack is facing the bottom of the lower chord node of the steel truss beam. The invention utilizes the steel truss girder belt arch jacking device to realize the pushing and positioning of the steel truss girder and the flexible arch, so that the steel truss girder and the flexible arch are overall stable during the jacking construction, and the line shape is good, ensuring the quality of the jacking.

Description

Long-span continuous steel truss girder with vault pusher

technical field

The invention relates to the technical field of bridge steel structure installation, and is particularly suitable for a large-span continuous steel truss beam with arch jacking device in the construction of a large-span steel truss beam with arch multi-point continuous jacking method. the

Background technique

In the construction of steel bridges, long-span steel truss girders are often constructed by multi-point continuous jacking, and the steel truss girders are finally installed by pulling the steel truss girders through jacking jacks. the

The current steel girder jacking is all pushed into position parallel to the truss girder, and the center of gravity of the beam is relatively low. The jacking device is set with a jacking slideway and slider according to the position of the center of gravity of the steel truss girder, and there is no jacking limit device, timely tracking and correcting device and vertical protection device for landing beam. However, in some steel truss girder jacking constructions, the steel truss girder and the flexible arch are pushed synchronously, and the center of gravity of the beam is at a higher position. Protective devices, which will not only affect the overall stability of the steel truss girder, reduce construction efficiency, but also fail to meet the design requirements of the bridge. the

Contents of the invention

The object of the present invention is to provide a large-span continuous steel truss girder belt vault push device, that is, to use the steel truss beam belt vault push device to realize the pushing of the steel truss beam and flexible arch in place, so that the steel truss beam and flexible arch In the jacking construction, the overall stability and good line shape ensure the quality of jacking. the

The technical scheme that the present invention adopts is as follows:

A long-span continuous steel truss girder belt vault push device, including a sliding device and a main pushing system device, the sliding device includes left and right longitudinal slideway beams and sliders, and the left and right The inner edge of the longitudinal slideway beam is respectively provided with longitudinal full-length limit stops, the inner wall of the slider is placed on the longitudinal full-length limit stop, and the outer side of the slider is provided with a correction device, which is divided into tracking and correction device, fixed deviation correction device, the fixed deviation correction device includes a support and a fixed deviation correction oil cylinder fixed horizontally on the support, the piston rod of the fixed deviation correction oil cylinder is pressed against the outer wall of the slider, and the tracking deviation correction device includes a position on the left, The error correction track on the right longitudinal slideway beam, the error correction track is slidingly provided with a tracking deviation correction support, and a tracking deviation correction oil cylinder is installed on the tracking deviation correction support, and the piston rod of the tracking deviation correction oil cylinder presses against the outer wall of the slider The main jacking system device includes a horizontal continuous jacking jack fixed on the front ends of the left and right longitudinal slideway beams, a vertical jacking jack on the upper surface of the left and right longitudinal slideway beams, and a jack clamped on the The C-shaped reaction seat on the steel truss beam, the horizontal continuous jacking jack is a through-hole jack, and the ends of multiple horizontal traction cables drawn from the horizontal continuous jacking jack are fixedly connected to the C-shaped reaction seat. The piston rod of the above-mentioned vertical lifting jack is right at the bottom of the lower chord node of the steel truss girder. the

A longitudinal stainless steel main slideway is laid on the top surface of the left and right longitudinal slideway beams. the

The ends of the left and right longitudinal slideway beams are provided with lifting and falling protection buttresses, and the lifting and falling protection buttresses are smaller than the height of the slider. the

Both the horizontal continuous jacking jack and the C-shaped reaction seat are provided with the same number of grippers to clamp the horizontal traction cables. the

The maximum stroke of the horizontal continuous jacking jack is 170mm. the

A polytetrafluoroethylene plate is fixed on the bottom surface of the slider, and the dynamic friction coefficient between the polytetrafluoroethylene plate and the longitudinal stainless steel main slideway is 0.06-0.1. the

The lower end of the C-shaped reaction seat is fixedly connected to the bottom plate of the lower chord of the steel truss beam, and the upper end of the C-shaped reaction seat is clamped with the top plate of the lower chord of the steel truss beam to hold a jacking cylinder. the

Compared with prior art, advantage of the present invention is:

1. According to the characteristics of steel truss girders with arches, the present invention sets limit stops and correction devices, so that steel trusses and flexible arches are overall stable during the process of pushing, and the bridge alignment meets the design requirements. the

2. The timely tracking and correcting device provided by the present invention can well control and adjust the plane position of the steel truss girder and the flexible vault when pushed, and ensure that the quality of the completed bridge meets the specification requirements. the

3. The girder arch lifting and falling protection device provided in the present invention can well ensure the safety requirements when the steel truss girder flexibly arches and rises and falls. the

4. The present invention integrates multiple functions, saves cost to the greatest extent, and simplifies construction. the

Description of drawings

Fig. 1 is a schematic diagram of the layout of the present invention. the

Fig. 2 is a schematic diagram of the elevation layout of the present invention. the

Fig. 3 is a schematic diagram of the layout of the limit stopper and the timely tracking and deviation correction device of the present invention. the

Fig. 4 is a schematic diagram of the arrangement of the fixed deviation correcting oil cylinder of the present invention. the

Fig. 5 is a schematic diagram of the layout of the landing protection pier of the present invention. the

Fig. 6 is a schematic diagram of the layout of the horizontal continuous jacking jacks of the present invention. the

Fig. 7 is a schematic diagram of the layout of the horizontal deviation correction jack and the vertical jacking jack of the present invention. the

Detailed ways

Referring to the accompanying drawings, a large-span continuous steel truss girder belt vault push device includes a sliding device and a main pushing system device. The sliding device includes left and right longitudinal slideway beams 1, 2, and a slider 3. The inner edges of the left and right longitudinal slideway beams 1 and 2 are respectively provided with longitudinal full-length limit stops 4, and the inner wall of the slider 3 is placed on the longitudinal full-length limit stop 4, and the left and right longitudinal The top surface of the slideway beam is laid with a longitudinal stainless steel main slideway, and the ends of the left and right longitudinal slideway beams are provided with a lifting protection pier 5, the lifting protection pier 5 is less than the height of the slider 3, and the outside of the slider is provided with The deviation correction device is divided into tracking deviation correction device and fixed deviation correction device. The fixed deviation correction device includes a support 6 and a fixed deviation correction oil cylinder 7 horizontally fixed on the support 6. The piston rod of the fixed deviation correction oil cylinder 7 presses against the slider 3 On the outer wall of the slider, a polytetrafluoroethylene plate is fixed on the bottom surface of the slider. The dynamic friction coefficient between the polytetrafluoroethylene plate and the longitudinal stainless steel main slideway is 0.06-0.1. The error correction track 11 on the side longitudinal slide beam, the error correction track 11 is slidably provided with a tracking deviation correction support 12, and the tracking deviation correction support 12 is installed with a tracking deviation correction oil cylinder 13, and the piston rod of the tracking deviation correction oil cylinder presses against the slider on the outer wall of the outer wall; the main jacking system device includes horizontal continuous jacking jacks 8 fixedly installed on the front ends of the left and right longitudinal slideway beams 1 and 2, respectively. The lifting jack 9 and the C-shaped reaction seat 10 clamped on the steel truss beam, the horizontal continuous lifting jack is a through-hole jack, and the maximum stroke of the horizontal continuous lifting jack is 170mm. The ends of multiple horizontal traction cables 14 are fixedly connected to the C-shaped reaction seat 10, the lower end of the C-shaped reaction seat is fixedly connected to the bottom plate of the lower chord of the steel truss girder, and the upper end of the C-shaped reaction seat is connected to the lower chord of the steel truss girder. The top plate of the rod clamps the jacking oil cylinder, and the horizontal continuous jacking jack and the C-shaped reaction seat are equipped with the same number of clamps to clamp the horizontal traction cable. The piston rod of the vertical jacking jack is facing the steel The bottom of the bottom chord node of the truss. the

Claims (7)

1. A large-span continuous steel truss girder band arch jacking device, comprising a sliding device, a main pushing system device, characterized in that: the sliding device includes left and right longitudinal slideway beams, a slide block, The inner edges of the left and right longitudinal slideway beams are respectively provided with longitudinal full-length limit stops, the inner side wall of the slider is placed on the longitudinal full-length limit stop, and the outer side of the slider is provided with a deviation correction device. The deviation correction device is divided into a tracking deviation correction device and a fixed deviation correction device. The fixed deviation correction device includes a support and a fixed deviation correction oil cylinder fixed horizontally on the support. The piston rod of the fixed deviation correction oil cylinder presses against the outer wall of the slider. The tracking deviation correction device It includes the error correction track placed on the left and right longitudinal slideway beams, the error correction track is slidably provided with a tracking deviation correction support, and a tracking deviation correction oil cylinder is installed on the tracking deviation correction support, and the piston rod of the tracking deviation correction oil cylinder presses on the on the outer wall of the slider; the main thrusting system device includes horizontal continuous jacking jacks fixedly installed on the front ends of the left and right longitudinal slideway beams respectively, and vertical jacks located on the upper surfaces of the left and right longitudinal slideway beams. The jacking jack and the C-shaped reaction seat clamped on the steel truss beam, the horizontal continuous jacking jack is a through-hole jack, and the ends of multiple horizontal traction cables drawn from the horizontal continuous jacking jack are fixedly connected to the C On the type reaction force seat, the piston rod of the vertical lifting jack is right at the bottom of the lower chord node of the steel truss girder. 2. The large-span continuous steel truss girder belt vault pushing device according to claim 1, characterized in that: longitudinal stainless steel main slideways are laid on the top surfaces of the left and right longitudinal slideway beams. 3. The large-span continuous steel truss girder belt vault pushing device according to claim 1, characterized in that: the ends of the left and right longitudinal slide beams are provided with lifting protection piers, and the lifting protection piers are smaller than the sliding The height of the block. 4. The large-span continuous steel truss girder belt vault pushing device according to claim 1, characterized in that: the horizontal continuous jacking jack and the C-shaped reaction seat are equipped with the same number of clamps to clamp Horizontal dragline. 5. The large-span continuous steel truss girder belt vault pushing device according to claim 1, characterized in that: the maximum stroke of the horizontal continuous jacking jack is 170mm. 6. The large-span continuous steel truss girder belt vault pushing device according to claim 1, characterized in that: the bottom surface of the slider is fixed with a polytetrafluoroethylene plate, and the polytetrafluoroethylene plate is connected with the longitudinal stainless steel main body. The coefficient of dynamic friction between slideways is 0.06-0.1. 7. The large-span continuous steel truss girder belt vault pusher according to claim 1, characterized in that: the lower end of the C-shaped reaction seat is fixedly connected with the bottom plate of the steel truss girder lower chord, and the C-shaped reaction seat The upper end of the steel truss beam and the top plate of the lower chord of the steel truss beam are clamped with a jacking oil cylinder.

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