Assembly type bent cap section installation supporting structure

Abstract

The utility model relates to an assembly type bent cap section installation supporting structure which is characterized in that a bent cap section is supported on a pier column in the transverse bridge direction, the bent cap section extends out of the pier column to form a long cantilever, the bent cap section extends out of the inner side of the pier column to form a short cantilever, and a temporary buttress is arranged below the middle of the long cantilever of the bent cap section. The temporary buttress is an assembly type support formed by connecting a plurality of support sections up and down, a plurality of counter-pull anchoring ribs are connected between the short cantilever end of the bent cap section and the pier column bearing platform, and the counter-pull anchoring ribs are arranged in a row in the transverse direction of the bent cap section at equal intervals. The weight of the two ends of the bent cap section can be effectively balanced, and construction safety is guaranteed; the temporary buttress adopts an assembled structure, so that the mounting and dismounting speed is high, and the site construction time is shortened; the temporary buttress is small in size, can release the space under the bridge in the construction period to the maximum extent, and reduces the traffic influence on the road under the bridge.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction and relates to an installation support structure of an assembled cap beam segment. Background Art

[0002] When constructing an elevated bridge across an existing road, under the condition of ensuring traffic is maintained, the bridge cap beam usually adopts a prefabricated assembled structure. The cap beam is processed in the prefabrication yard, transported to the site and directly hoisted onto the piers to shorten the on-site construction time and avoid long-term impact on traffic under the bridge.

[0003] In order to reduce the weight of the cap beam, the prefabricated cap beam is generally divided into two large sections. When each section is hoisted onto the pier, the cantilever lengths at both ends are different. Therefore, it is necessary to set up a support under the long cantilever outside the pier to balance the weight of the cap beam section at both ends. The conventional support method is to set up a full-height bracket under the long cantilever of the cap beam, but there are the following problems:

[0004] 1. The full-hall bracket is large in size, and the erection and disassembly cycle is long, which prolongs the construction period;

[0005] 2. The full-floor bracket needs to pour concrete to expand the foundation, which increases the construction cost;

[0006] 3. The full-bridge support occupies a large space under the bridge, resulting in the construction access road having to occupy the road for maintenance, or the mixing of construction vehicles and social vehicles, which easily causes traffic jams. Summary of the invention

[0007] The purpose of the utility model is to provide an assembled cap beam segment installation support structure with a simple structure, fast installation and disassembly speed, and small space occupied under the bridge in order to solve the above problems.

[0008] The technical solution of the utility model is as follows:

[0009] A prefabricated cap beam segment installation support structure, the cap beam segment is supported on the pier in the transverse direction, the cap beam segment extends a long cantilever on the outside of the pier, and extends a short cantilever on the inside of the pier, characterized in that: a temporary pier is provided below the middle of the long cantilever of the cap beam segment, the temporary pier is a prefabricated bracket formed by connecting a plurality of bracket segments up and down, a plurality of counter-tension anchor bars are connected between the short cantilever end of the cap beam segment and the pier pedestal, and the plurality of counter-tension anchor bars are arranged in a row equidistantly along the transverse direction of the cap beam segment.

[0010] The utility model arranges temporary piers under the large cantilever of the prefabricated cap beam segment, and arranges anti-tension anchor bars between the small cantilever and the pedestal, which can effectively balance the weight at both ends of the cap beam segment and ensure construction safety; the temporary piers adopt an assembled bracket structure, which has fast installation and disassembly speeds and is conducive to shortening the on-site construction time; the temporary piers are small in size and can release the space under the bridge to the maximum extent during the construction period, ensuring smooth passage of the road under the bridge during the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the transverse bridge of the utility model viewed from the side;

[0012] Figure 2 It is a schematic diagram of the plane structure of the utility model;

[0013] Figure 3 It is a side view of the temporary buttress foundation segment;

[0014] Figure 4 It is a side view of an intermediate section of the temporary buttress;

[0015] Figure 5 It is a side view of the top segment of the temporary buttress;

[0016] Figure 6 It is a plan view of a support segment of a temporary pier;

[0017] Figure 7 This is a schematic diagram of the installation and construction status of a complete prefabricated cap beam. DETAILED DESCRIPTION

[0018] like Figure 1 , Figure 2 As shown, a prefabricated cap beam segment 1 is supported transversely on the pier 2, and the cap beam segment 1 extends a long cantilever on the outside of the pier 2 and a short cantilever on the inside of the pier; a temporary pier 4 is provided below the middle of the long cantilever of the cap beam segment 1, and the temporary pier 4 is an assembled support formed by connecting a plurality of support segments up and down, and a plurality of counter-tension anchor bars 5 are connected between the short cantilever end of the cap beam segment 1 and the pier pedestal 3, and the plurality of counter-tension anchor bars 5 are arranged in a row equidistantly along the transverse direction of the cap beam segment 1.

[0019] In the above structure, the temporary pier 4 is supported below the long cantilever end of the prefabricated cap beam segment 1 on the outside of the pier column, which can reduce the cantilever length of the cap beam segment. At the same time, the reverse tension anchoring reinforcement of the short cantilever section of the prefabricated cap beam anchors the short cantilever, which can keep the two ends of the cap beam segment balanced.

[0020] Depend on Figure 1 It can be seen that the temporary pier 4 of the utility model is relatively small in size and occupies little space under the bridge. A fence 9 is arranged outside the temporary pier under the bridge, and private vehicles 10 can pass normally on the road surface outside the fence 6.

[0021] like Figures 3 to 6As shown, the temporary pier 4 includes a support base segment, at least one support middle segment and a support top segment, each support segment includes 4 columns 41 arranged at the four vertices of a rectangle, and cross beams 42 are welded between the upper ends and lower ends of the 4 columns according to the four sides of the rectangle, and parallel joints and diagonal braces are welded between adjacent columns; a bottom plate 43 is welded to the lower ends of the 4 columns of the support base segment, and a connecting plate 44 perpendicular to the axis of the column is welded to the outer sides of the upper ends of the 4 columns; the upper and lower ends of the 4 columns 41 of the standard section of the support are welded to the upper and lower ends of the 4 columns. A connecting plate 44 perpendicular to the axial direction of the column is welded to the outer side of the end; a connecting plate 44 perpendicular to the axial direction of the column is welded to the outer side of the lower end of the four columns 41 of the top segment of the bracket, and a cylinder 45 is vertically fixed on the upper end of the four columns; a screw hole 441 is preset on the connecting plate 44 on each column, and the connecting plates 44 on the columns of the upper and lower segments are connected by bolts; the bottom plates at the lower ends of the four columns of the bracket foundation segment are supported on the ground concrete foundation, and the upper ends of the four cylinders 45 on the top of the bracket top segment are respectively supported on the bottom surface of the prefabricated cap beam segment.

[0022] During the specific implementation of the present invention, in order to facilitate the connection and disassembly operations between the bracket segments, a ladder 46 is vertically welded on one side or two opposite sides of each bracket segment along the bracket segment.

[0023] In order to ensure the structural stability and the safety of the construction workers during the installation and disassembly stages of the support, guy ropes 6 are provided on the four sides of the temporary pier 4, the upper end of each guy rope is connected to the middle of a crossbeam of a middle section of the support, and the lower end of each guy rope is connected to an anchor bolt 7 driven into the ground.

[0024] like Figure 2 As shown, in order to install the reverse tension anchor bar, a row of anchor bar reserved holes 11 are preset at the short cantilever end of the cap beam segment 1 along the transverse direction of the cap beam; Figure 1 As shown in the figure, each reverse tension anchor bar 5 includes an embedded section 51 and an extended section 52. The lower end of the embedded section 51 is anchored in the concrete of the pedestal 3, and the upper end protrudes above the pedestal. The length of the extended section is set according to the height of the cap beam. The lower end of the extended section 52 is connected to the upper end of the embedded section 51 through a threaded sleeve 53. The upper end of the extended section 52 passes through the reserved hole on the cap beam and is screwed with an anchor nut 8 on the top surface of the cap beam.

[0025] like Figure 7 As shown, during the construction of the utility model, two prefabricated cap beam segments 1 are successively installed on two piers 2, and then the cast-in-place connecting section between the two prefabricated cap beam segments is cast to complete the installation construction of the entire cap beam, and finally the anti-tension anchoring reinforcement 5 and the temporary pier 4 are successively removed. During the construction period, since the temporary pier only occupies a small part of the space under the bridge, it will not cause a big impact on the traffic under the bridge, and the bridge construction under the condition of ensuring traffic is achieved.

Claims

1. An assembled cap beam segment installation support structure, wherein the cap beam segment is supported on the pier in the transverse direction, the cap beam segment extends a long cantilever outside the pier and a short cantilever inside the pier, characterized in that: A temporary pier is provided at the lower middle of the long cantilever of the cap beam segment. The temporary pier is an assembled bracket formed by connecting multiple bracket segments up and down. Multiple anti-tension anchor bars are connected between the short cantilever end of the cap beam segment and the pier column cap. The multiple anti-tension anchor bars are arranged in a row at equal intervals along the transverse direction of the cap beam segment.

2. The assembled cap beam segment installation support structure according to claim 1 is characterized in that: The temporary pier includes a support base segment, at least one support middle segment and a support top segment, each support segment includes four columns arranged according to the four vertices of a rectangle, and cross beams are welded between the upper ends and lower ends of the four columns according to the four sides of the rectangle; a bottom plate is welded to the lower ends of the four columns of the support base segment, and a connecting plate perpendicular to the axis of the column is welded to the outer side of the upper ends of the four columns; a connecting plate perpendicular to the axis of the column is welded to the outer side of the upper and lower ends of the four columns of the standard section of the support; a connecting plate perpendicular to the axis of the column is welded to the outer side of the lower ends of the four columns of the top segment of the support, and an oil cylinder is vertically fixed on the upper ends of the four columns; screw holes are preset on the connecting plate on each column, and the connecting plates on the columns of the upper and lower segments are connected by bolts, the bottom plates at the lower ends of the four columns of the support base segment are supported on the ground concrete foundation, and the upper ends of the four oil cylinders at the top of the top segment of the support are supported on the bottom surface of the prefabricated cap beam segment.

3. The assembled cap beam segment installation support structure according to claim 2 is characterized in that: A ladder is vertically welded on one side or two opposite sides of each bracket segment along the bracket segment.

4. The assembled cap beam segment installation support structure according to claim 2 is characterized in that: Guy ropes are provided on the four sides of the temporary pier, the upper end of each guy rope is connected to the middle of a crossbeam of a middle section of a support, and the lower end of each guy rope is connected to an anchor bolt driven into the ground.

5. The assembled cap beam segment installation support structure according to claim 1 is characterized in that: A row of reserved holes for anchor bars are preset at the short cantilever end of the cap beam segment along the transverse direction of the cap beam; each reverse tension anchor bar includes an embedded section and an extended section, the lower end of the embedded section is anchored in the concrete of the pedestal, and the upper end protrudes above the pedestal, the lower end of the extended section is connected to the upper end of the embedded section by a threaded sleeve, the upper end of the extended section passes through the reserved hole on the cap beam, and the anchor nut is screwed on the top surface of the cap beam.

6. The assembled cap beam segment installation support structure according to claim 2 is characterized in that: Cable wind ropes are respectively arranged on the four sides of the temporary pier, the upper end of each cable wind rope is connected to the middle of a crossbeam of a middle section of a bracket, and the lower end of each cable wind rope is fixedly connected to an anchor bolt driven into the ground.

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