Novel assembly type support for bridge construction and construction method of novel assembly type support

Abstract

The invention relates to a novel fabricated support for bridge construction and a construction method thereof, and discloses a brand-new on-site adjusting, fixing and reinforcing structure and a brand-new on-site adjusting, fixing and reinforcing method, on-site construction operation is carried out through fabricated vertical pipes and supporting vertical plates at the top of a support body, and on-site marking is carried out on the fabricated vertical pipes in real time according to the inclination angle of a bridge bottom plate; therefore, the position and the angle of the supporting vertical plate are positioned in a high-precision mode, the whole supporting frame supports a bridge bottom plate precisely and stably, the construction quality of a bridge is improved, materials are saved, mounting and dismounting are convenient and fast, connection is firm, and the construction cost is reduced on the basis that the universality and the turnover performance of the support are effectively improved. The synchronous propulsion support measure is designed, manufactured, constructed and popularized in a standardized mode, and good economic benefits are achieved.

Description

A novel prefabricated support structure for bridge construction and its construction method Technical Field

[0001] This invention belongs to the field of support frame reinforcement, and specifically relates to a novel prefabricated support for bridge construction and its construction method. Background Technology

[0002] Bridge supports are important facilities in the bridge construction process. They not only provide support for the concrete structure, but also provide an operating platform for on-site workers to meet the requirements for material transportation and stacking during construction.

[0003] Currently, the main types of supports used in bridge construction include disc-lock supports, cup-lock supports, and pier-type supports. Disc-lock or cup-lock supports use multi-point assembly of the uprights, which makes the construction process more complicated and requires a higher level of skill from the workers. The supports also have strict requirements on the overall foundation, making them prone to overall collapse and safety issues.

[0004] To this end, CN116657500A discloses a monitorable assembly support for supporting bridges. The frame is an assembly structure to meet the need for height adjustment. The top of the frame is supported by a second jack 5.1 and a second support seat 5.2 fixed on the screw of the second jack 5.1.

[0005] However, since the bottom plate of the beam often has an inclined angle and the bottom plate of the beam of the same bridge often has multiple shapes with different inclination angles in the cross-sectional direction, the current support method cannot ensure that the top support structure of the frame is tightly integrated with the bottom formwork of the beam, resulting in uneven support stress and affecting the pouring quality of the bridge. In addition, the current frame assembly method is difficult to prepare and has low assembly efficiency. Summary of the Invention

[0006] This invention provides a novel prefabricated support structure and its construction method for bridge construction, which solves the technical problems of uneven support stress affecting the bridge pouring quality, as the bottom plate of the beam often has an inclined angle and the bottom plate of the beam of the same bridge often has multiple inclination angles in the cross-sectional direction. Furthermore, the current support method is difficult to prepare and has low assembly efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A novel prefabricated support construction method for bridge construction, comprising the following steps: Step 1: Detailing the drawings. The support structure includes prefabricated columns, prefabricated crossbeams, prefabricated longitudinal beams, prefabricated top beams, prefabricated risers, back-cut slots, and support plates. The prefabricated columns are grouped in fours. The prefabricated crossbeams and longitudinal beams are connected between the prefabricated columns to form a frame structure. The prefabricated top beams are fixedly installed at the top of the rows of prefabricated columns. The prefabricated top beams are horizontally arranged and parallel to the cross-section of the bridge. The prefabricated risers are vertically installed at the top of the prefabricated top beams. Back-cut slots are opened on the prefabricated risers, parallel to the cross-section of the bridge. Support plates are welded into the back-cut slots, and the top of the support plates rests against the bridge base plate. Step 2: Construction preparation and surveying. Based on the design drawings of the steel bridge and the actual site conditions, the support structure is prepared and surveyed. Step 1: Calculate the stress on the support frame to determine the overall layout, height, span, and specifications and quantity combination scheme of the standard units and standard section beams. Inventory and transport all standard components to the site. Step 2: Assemble the main structural system. Install prefabricated columns under the bridge base slab according to the layout positioning, and then connect and reinforce the prefabricated columns through prefabricated crossbeams and prefabricated longitudinal beams. Step 3: Install the top support system. Install prefabricated risers at intervals on the prefabricated top beams. Place the support plates against the bottom of the bridge base slab. Then, mark the positions of the support plates on the prefabricated risers. Cut back slots parallel to the cross-section of the bridge on the prefabricated risers. Then, install the prefabricated top beams on top of the prefabricated columns. Step 4: Install the support plates. Place the support plates in the back slots and place the support plates against the bottom of the bridge base slab. Then, weld the support plates to the prefabricated risers to complete the support.

[0008] Preferably, the top of the supporting upright plate is further provided with a supporting top plate, the supporting upright plate and the supporting top plate form a T-shape, and the thickness of the supporting upright plate is 16-30mm.

[0009] Preferably, the prefabricated column is an I-beam, including a web and two flanges on both sides, with bolt holes spaced apart on the flanges. The prefabricated crossbeam and prefabricated longitudinal beam are both channel steel. The prefabricated crossbeam is attached to the side of the flange and connected to the prefabricated column by bolts. The two ends of the prefabricated longitudinal beam are fixed with flange plates and connected between the opposite flanges by bolts.

[0010] Preferably, the prefabricated top beam and the prefabricated column have the same structure, and the two ends of the prefabricated column are welded with end plates and connected to the prefabricated top beam by bolts.

[0011] Preferably, the prefabricated column is composed of multiple segments spliced ​​together and connected by end plates and bolts.

[0012] Preferably, the bottom end of the prefabricated column is set on a concrete base, and an embedded steel plate with a size larger than that of the prefabricated column is set on the concrete base. An L-shaped pressure plate is also set, with the horizontal edge of the L-shaped pressure plate pressing on the end plate at the bottom end of the prefabricated column, and the vertical edge of the L-shaped pressure plate being welded downward from the outside of the end plate at the bottom end of the prefabricated column to the embedded steel plate.

[0013] Preferably, the two ends of the prefabricated top beam extend beyond the prefabricated columns, and prefabricated diagonal braces are provided between the prefabricated columns and the prefabricated top beam. The prefabricated diagonal braces are made of channel steel, and flange plates are provided at both ends of the prefabricated diagonal braces and are connected to the prefabricated columns and the prefabricated top beam respectively by bolts.

[0014] Preferably, stiffening ribs are provided at intervals between the two wing plates of the prefabricated column.

[0015] Preferably, prefabricated diagonal beams are provided between the prefabricated crossbeams, and the prefabricated diagonal beams are fixed to the flanges by bolts. Prefabricated longitudinal diagonal beams are provided between the prefabricated longitudinal beams, and flange plates are provided at both ends of the prefabricated longitudinal diagonal beams and fixed to the flanges by bolts.

[0016] The beneficial effects of this invention are as follows: 1. This application provides a novel on-site adjustment, fixing, and reinforcement structure and method. The prefabricated risers and supporting plates at the top of the frame are installed on-site. Lines are drawn on the prefabricated risers in real time according to the inclination angle of the bridge base plate, thereby accurately positioning the position and angle of the supporting plates. This allows the entire support frame to provide precise and stable support to the bridge base plate, improving the construction quality of the bridge, saving materials, facilitating quick and easy installation and dismantling, and ensuring reliable connections. While effectively improving the versatility and reusability of the support system, it also promotes the standardized design, manufacturing, construction, and dissemination of support measures, resulting in significant economic benefits. 2. This application provides a novel prefabricated frame that can be constructed using standard section columns (0.1m, 0.15m, ...). The frame offers 30 lengths (0.95m, 1.0m, 2.0m, ..., 11.0m, 12.0m), allowing for the assembly of standard units of any height / length with an accuracy of 0.05m through various combinations (preferably using whole sections and longer column combinations; for example, for a structural height of 13.7m, the preferred combination is 12+1+0.7=13.7m). Furthermore, its assembly connection with the prefabricated top beam allows for arbitrary adjustment of longitudinal length, achieving full assembly of the steel bridge deck beam construction support frame. It utilizes readily available I-beams, requiring only drilling and stiffening ribs for fabrication, resulting in convenient manufacturing and high strength. The ingenious connection between the prefabricated crossbeams and longitudinal beams on the prefabricated columns—one side connection and one front-facing connection—achieves quick and convenient assembly and installation.

[0017] 3. The column base is installed stably. The bottom of the prefabricated column is set on a concrete base. The concrete base is equipped with a pre-embedded steel plate with a size larger than that of the prefabricated column. An L-shaped pressure plate is also installed. The horizontal edge of the L-shaped pressure plate presses against the end plate at the bottom of the prefabricated column. The vertical edge of the L-shaped pressure plate is welded downward from the outside of the end plate at the bottom of the prefabricated column to the pre-embedded steel plate, which firmly fixes the prefabricated column and has very high stability.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objects and other advantages of the invention may be realized and obtained by means of the embodiments particularly pointed out in the description. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of a single bracket according to an embodiment of the present invention; Figure 2 is a partial view of the top of a single bracket according to an embodiment of the present invention; Figure 3 is a partial view of the bottom of a single bracket according to an embodiment of the present invention; Figure 4 is a schematic diagram of assembled columns of different sizes according to an embodiment of the present invention; Figure 5 is a schematic diagram of the overall installation according to an embodiment of the present invention; Figure 6 is an enlarged top view of the overall installation according to an embodiment of the present invention.

[0020] Reference numerals: 1. Prefabricated column; 101. Web plate; 102. Flange plate; 103. Bolt hole; 104. End plate; 105. Stiffening rib; 2. Prefabricated crossbeam; 201. Prefabricated transverse and diagonal beam; 3. Prefabricated longitudinal beam; 301. Flange plate; 302. Prefabricated longitudinal and diagonal beam; 4. Prefabricated top beam; 401. Prefabricated diagonal brace; 5. Prefabricated riser; 6. Rear-cut slot; 7. Support plate; 8. Support plate; 9. Concrete base; 10. Embedded steel plate; 11. L-shaped pressure plate. Detailed Implementation

[0021] The technical solutions of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and should not be construed as limiting the technical solutions of the present invention.

[0022] Referring to Figures 1-6, a novel prefabricated support structure construction method for bridge construction includes the following steps: Step 1: Detailing the drawings. The support structure includes prefabricated columns 1, prefabricated crossbeams 2, prefabricated longitudinal beams 3, prefabricated top beams 4, prefabricated risers 5, back-cut slots 6, and support plates 7. The prefabricated columns 1 are grouped into four sets. The prefabricated crossbeams 2 and prefabricated longitudinal beams 3 are connected between the prefabricated columns 1 to form a frame structure. The prefabricated top beams 4 are fixedly installed at the top of the rows of prefabricated columns 1. The prefabricated top beams 4 are horizontally arranged and parallel to the cross-section of the bridge. The prefabricated risers 5 are vertically installed at the top of the prefabricated top beams 4. Back-cut slots 6 are opened on the prefabricated risers 5, which are parallel to the cross-section of the bridge. The support plates 7 are welded into the back-cut slots 6, and the top of the support plates 7 rests against the bridge base plate. Step 2: Construction preparation and surveying. Based on the design drawings of the steel bridge and the actual site conditions, the support frame stress is measured. The process involves five steps: First, determining the overall layout, height, span, and specifications and quantity of standard units and standard crossbeams for the support frame; second, assembling the main structural system by installing prefabricated columns 1 under the bridge base slab according to the layout positioning; third, connecting and reinforcing prefabricated columns 1 with prefabricated crossbeams 2 and prefabricated longitudinal beams 3; fourth, installing the top support system by installing prefabricated risers 5 at intervals on the prefabricated top beam 4; fifth, placing the support plates 7 against the bottom of the bridge base slab; sixth, marking lines on the prefabricated risers 5 according to the position of the support plates 7; seventh, cutting parallel back-cut slots 6 to the cross-section of the bridge on the prefabricated risers 5; and finally, installing the prefabricated top beam 4 on top of the prefabricated columns 1; and finally, installing the support plates 7 by placing the support plates 7 in the back-cut slots 6, placing the support plates 7 against the bottom of the bridge base slab, and then welding the support plates 7 to the prefabricated risers 5 to complete the support.

[0023] A supporting top plate 8 is also provided on the top of the supporting upright plate 7. The supporting upright plate 7 and the supporting top plate 8 form a T-shape. The thickness of the supporting upright plate 7 is 16-30mm.

[0024] The prefabricated column 1 is an I-beam, including a web 101 and two flanges 102 on both sides. Bolt holes 103 are spaced apart on the flanges 102. The prefabricated crossbeam 2 and the prefabricated longitudinal beam 3 are both channel steel. The prefabricated crossbeam 2 is attached to the side of the flange 102 and connected to the prefabricated column 1 by bolts. The two ends of the prefabricated longitudinal beam 3 are fixed with flange plates 301 and connected between the opposite flanges 102 by bolts.

[0025] The prefabricated top beam 4 has the same structure as the prefabricated column 1. The prefabricated column 1 has end plates 104 welded to both ends and is connected to the prefabricated top beam 4 by bolts.

[0026] The prefabricated column 1 is composed of multiple sections spliced ​​together and connected by end plates 104 and bolts.

[0027] The bottom of the prefabricated column 1 is set on the concrete base 9. The concrete base 9 is provided with a pre-embedded steel plate 10 with a size larger than that of the prefabricated column 1, and an L-shaped pressure plate 11 is provided. The horizontal edge of the L-shaped pressure plate 11 presses on the end plate 104 at the bottom of the prefabricated column 1, and the vertical edge of the L-shaped pressure plate 11 is welded downward from the outside of the end plate 104 at the bottom of the prefabricated column 1 to the pre-embedded steel plate 10.

[0028] The two ends of the prefabricated top beam 4 extend beyond the prefabricated column 1. Prefabricated diagonal bracing 401 is provided between the prefabricated column 1 and the prefabricated top beam 4. The prefabricated diagonal bracing 401 is made of channel steel. Flange plates 301 are provided at both ends of the prefabricated diagonal bracing 401 and are connected to the prefabricated column 1 and the prefabricated top beam 4 respectively by bolts.

[0029] Stiffening ribs 105 are provided at intervals between the two wing plates 102 of the prefabricated column 1.

[0030] Prefabricated horizontal and vertical beams 201 are provided between the prefabricated horizontal beams 2. The prefabricated horizontal and vertical beams 201 are fixed to the flange 102 by bolts. Prefabricated vertical and vertical beams 302 are provided between the prefabricated vertical beams 3. Flange plates 301 are provided at both ends of the prefabricated vertical and vertical beams 302 and are fixed to the flange 102 by bolts.

[0031] The beneficial effects of this invention are as follows: 1. This application provides a novel on-site adjustment, fixing, and reinforcement structure and method. The prefabricated vertical pipe 5 and supporting vertical plate 7 at the top of the frame are constructed on-site. Based on the inclination angle of the bridge base plate, lines are drawn on the prefabricated vertical pipe 5 in real time, thereby accurately positioning the position and angle of the supporting vertical plate 7. This allows the entire support frame to provide precise and stable support to the bridge base plate, improving the construction quality of the bridge, saving materials, facilitating quick and easy installation and dismantling, and ensuring reliable connections. While effectively improving the versatility and reusability of the support system, it simultaneously promotes the standardized design, manufacturing, construction, and dissemination of support measures, resulting in significant economic benefits; 2. This application provides a novel prefabricated frame structure that can be constructed using standard section columns (0.1m, 0.15m, ... The system offers 30 lengths (0.95m, 1.0m, 2.0m, ..., 11.0m, 12.0m), allowing for the assembly of standard units of any height / length with an accuracy of 0.05m through various combinations (preferably using whole sections and longer column combinations; for example, for a structural height of 13.7m, the preferred combination is 12+1+0.7=13.7m). Furthermore, its assembly connection with the top prefabricated beam 4 allows for arbitrary adjustment of longitudinal length, achieving full assembly of the steel bridge deck beam construction support frame. It utilizes readily available I-beams, requiring only drilling and the addition of stiffening ribs 105 for easy fabrication and high strength. The ingenious connection between the prefabricated crossbeam 2 and prefabricated longitudinal beam 3 on the prefabricated column 1—one side connection and one front-facing connection—achieves quick and convenient assembly and installation.

[0032] 3. The column base is installed stably. The bottom of the prefabricated column 1 is set on the concrete base 9. The concrete base 9 is equipped with a pre-embedded steel plate 10 with a size larger than that of the prefabricated column 1, and an L-shaped pressure plate 11 is provided. The horizontal edge of the L-shaped pressure plate 11 presses on the end plate 104 at the bottom of the prefabricated column 1. The vertical edge of the L-shaped pressure plate 11 is welded downward from the outside of the end plate 104 at the bottom of the prefabricated column 1 to the pre-embedded steel plate 10, which firmly fixes the prefabricated column 1 and has very high stability.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A novel prefabricated support construction method for bridge construction, characterized in that: The following steps are included: Step 1, refine the drawings. The support structure includes prefabricated columns (1), prefabricated crossbeams (2), prefabricated longitudinal beams (3), prefabricated top beams (4), prefabricated risers (5), back-cut slots (6), and support plates (7). The prefabricated columns (1) are grouped into four sets. The prefabricated crossbeams (2) and prefabricated longitudinal beams (3) are connected between the prefabricated columns (1) to form a frame structure. The prefabricated top beams (4) are fixedly installed on the top of the rows of prefabricated columns (1). 4) The prefabricated riser (5) is installed vertically on the top of the prefabricated top beam (4) and is set horizontally and parallel to the cross section of the bridge. The prefabricated riser (5) has a back-cut slot (6) that is parallel to the cross section of the bridge. The support plate (7) is welded into the back-cut slot (6) and the top of the support plate (7) rests on the bottom plate of the bridge. Step 2: Construction preparation and surveying and setting out. According to the design drawings of the steel bridge and the actual site conditions, the stress calculation of the support frame is carried out to determine the overall layout of the support frame. Step 3: Assemble the main structural system. Install prefabricated columns (1) under the bridge bottom slab according to the layout and positioning. Then connect and reinforce the prefabricated columns (1) through prefabricated crossbeams (2) and prefabricated longitudinal beams (3). Step 4: Install the top support system. Install prefabricated risers (5) at intervals on the prefabricated top beams (4) and place the support plates (7) against the bridge bottom slab. At the bottom, then mark the position of the support plate (7) on the prefabricated riser (5), then cut the rear cut slot (6) parallel to the cross section of the bridge on the prefabricated riser (5), and then install the prefabricated top beam (4) on the top of the prefabricated column (1); Step 5: Install the support plate (7), place the support plate (7) in the rear cut slot (6), place the support plate (7) on the bottom of the bridge bottom plate, and then weld the support plate (7) to the prefabricated riser (5) to complete the support.

2. The construction method for a novel prefabricated support system for bridge construction according to claim 1, characterized in that: The top of the support plate (7) is also provided with a support top plate (8), and the support plate (7) and the support top plate (8) form a T-shape. The thickness of the support plate (7) is 16-30mm.

3. The construction method for a novel prefabricated support system for bridge construction according to claim 2, characterized in that: The prefabricated column (1) is an I-beam, including a web (101) and two flanges (102) on both sides. Bolt holes (103) are spaced apart on the flanges (102). The prefabricated crossbeam (2) and the prefabricated longitudinal beam (3) are both channel steel. The prefabricated crossbeam (2) is attached to the side of the flange (102) and connected to the prefabricated column (1) by bolts. The two ends of the prefabricated longitudinal beam (3) are fixed with flange plates (301) and connected between the opposite flanges (102) by bolts.

4. A novel prefabricated support construction method for bridge construction according to claim 3, characterized in that: The prefabricated top beam (4) has the same structure as the prefabricated column (1). The prefabricated column (1) has end plates (104) welded to both ends and connected to the prefabricated top beam (4) by bolts.

5. A novel prefabricated support construction method for bridge construction according to claim 4, characterized in that: The prefabricated column (1) is composed of multiple sections spliced ​​together and connected by end plates (104) and bolts.

6. A novel prefabricated support construction method for bridge construction according to claim 5, characterized in that: The bottom end of the prefabricated column (1) is set on a concrete base (9). A pre-embedded steel plate (10) larger than the prefabricated column (1) is set on the concrete base (9), and an L-shaped pressure plate (11) is set on it. The horizontal edge of the L-shaped pressure plate (11) presses on the end plate (104) at the bottom end of the prefabricated column (1), and the vertical edge of the L-shaped pressure plate (11) is welded downward from the outside of the end plate (104) at the bottom end of the prefabricated column (1) to the pre-embedded steel plate (10).

7. A novel prefabricated support construction method for bridge construction according to claim 6, characterized in that: The two ends of the prefabricated top beam (4) extend beyond the prefabricated column (1). A prefabricated diagonal brace (401) is provided between the prefabricated column (1) and the prefabricated top beam (4). The prefabricated diagonal brace (401) is a channel steel. Flange plates (301) are provided at both ends of the prefabricated diagonal brace (401) and are connected to the prefabricated column (1) and the prefabricated top beam (4) respectively by bolts.

8. A novel prefabricated support construction method for bridge construction according to claim 7, characterized in that: The prefabricated column (1) has stiffening ribs (105) spaced apart between the two wing plates (102).

9. A novel prefabricated support construction method for bridge construction according to claim 8, characterized in that: Prefabricated horizontal beams (201) are provided between the prefabricated horizontal beams (2), and the prefabricated horizontal beams (201) are fixed to the flanges (102) by bolts. Prefabricated vertical beams (302) are provided between the prefabricated vertical beams (3), and flanges (301) are provided at both ends of the prefabricated vertical beams (302) and fixed to the flanges (102) by bolts.

Images