A device for conveniently fixing a cast-in-place box girder corrugated pipe and a construction method thereof

Abstract

The present application relates to the technical field of highway engineering, and more particularly to a device for conveniently fixing cast-in-place box girder corrugated pipes and a construction method thereof. The device is mainly aimed at the problem that the cross-shaped positioning steel bars cannot be integrally installed and need to be welded on site, which is prone to cause damage to the corrugated pipes, and the cross-shaped positioning bars are not easy to operate during the construction process, thereby affecting the construction progress. The technical scheme is as follows: a main frame is provided, which comprises a plurality of web stirrups, a plurality of web main bars vertically installed inside the web stirrups, and a plurality of web waist bars horizontally sleeved outside the web stirrups; a cross arm bar is fixedly connected to the web stirrup, and a plurality of corrugated pipes are placed on the cross arm bar. The present application provides a device for conveniently fixing cast-in-place box girder corrugated pipes. The cast-in-place box girder corrugated pipe positioning bars are fixed in a U shape, which is better than the cross-shaped arrangement in terms of operation, can improve the efficiency of corrugated pipe construction, and also saves steel bars to improve economic benefits.

Description

Technical Field

[0001] This invention relates to the field of highway engineering technology, and in particular to a device and construction method for conveniently fixing corrugated pipes of cast-in-place box girders. Background Technology

[0002] Prestressing is an indispensable part of bridge engineering. Corrugated pipes are pre-embedded when tying the web reinforcement. The purpose of these pipes is to create channels in the concrete for the insertion of prestressing tendons. During construction, positioning reinforcement bars are needed to fix the corrugated pipes. Currently, positioning reinforcement bars are commonly arranged in a grid pattern and connected to the web stirrups by welding. However, this grid-shaped arrangement cannot be installed as a whole and requires on-site welding, which can easily damage the corrugated pipes. Furthermore, the grid-shaped positioning reinforcement is difficult to operate during construction, affecting the construction progress. Therefore, we propose a device and construction method for conveniently fixing the corrugated pipes of cast-in-place box girders. Summary of the Invention

[0003] The purpose of this invention is to address the problems in the prior art where the grid-shaped positioning reinforcement cannot be installed as a whole and requires on-site welding, which can easily damage the corrugated pipe. Furthermore, the grid-shaped positioning reinforcement is difficult to operate during construction, affecting the construction progress. This invention proposes a device and construction method for conveniently fixing the corrugated pipe of the cast-in-place box girder.

[0004] On one hand, the present invention provides a device for conveniently fixing the corrugated pipe of a cast-in-place box girder, comprising:

[0005] The main frame includes multiple sets of web stirrups, multiple sets of web main bars vertically installed inside the web stirrups, and multiple sets of web waist bars horizontally sleeved outside the web stirrups.

[0006] A crossbeam is fixedly connected to the stirrups of the web plate. Multiple sets of corrugated pipes are placed on the crossbeam, and U-shaped steel bars are also installed on the crossbeam for fixing the corrugated pipes.

[0007] A positioning component for positioning the corrugated pipe before the installation of the U-shaped reinforcing bar. The positioning component is sleeved on the outside of the crossbeam and can adapt to the bending of the corrugated pipe by having both horizontal and inclined states.

[0008] Optionally, the crossbeams are welded to the side of the web stirrups to support the bottom of the corrugated pipe; in the horizontal position of the corrugated pipe, the crossbeams are equidistantly distributed, with three sets of web stirrups between two sets of crossbeams; in the inclined position of the corrugated pipe, the crossbeams are also equidistantly distributed, with two sets of web stirrups between two sets of crossbeams.

[0009] Optionally, the positioning component includes a movable block sleeved on the outer ring of the crossbeam, the movable block being threaded with multiple sets of positioning bolts, one end of each positioning bolt being rotatably connected to a pressing block, and one side of the pressing block being in contact with the outer ring of the crossbeam.

[0010] Optionally, the positioning component further includes a mounting block fixedly connected to the bottom of the movable block, a fixing column fixedly connected in the mounting block, a rotating block rotatably connected to the outer ring of the fixing column, fixing blocks fixedly connected to both ends of the rotating block, a sliding groove provided in the fixing block, a slider provided in the sliding groove, and a support block fixedly connected to the top of the slider.

[0011] Optionally, the slider is slidably connected in the groove, and the top of the support block is provided with a first arc-shaped groove corresponding to the surface of the bellows.

[0012] Optionally, the moving block is equipped with multiple sets of guide blocks, and the bottom of the extrusion block is provided with a guide groove corresponding to the guide block. The guide block is slidably connected in the guide groove, and both the guide block and the guide groove are L-shaped structures.

[0013] Optionally, a second arc-shaped groove is provided on the top of both the moving block and the extrusion block.

[0014] Optionally, the fixing block may also have multiple cavities, in which a limiting plate is slidably connected, and a connecting rod is fixedly connected to the top of the limiting plate, with one end of the connecting rod being fixedly connected to the support block.

[0015] Optionally, a spring is also provided in the cavity, and one end of the spring is fixedly connected to the limiting plate.

[0016] On the other hand, the present invention provides a construction method for a device that facilitates fixing the corrugated pipe of a cast-in-place box girder, comprising the following steps:

[0017] Step 1: First, the web stirrups, web main bars, web waist bars, cross bars, and U-shaped bars are fabricated to the required lengths upon arrival at the site and then mass-produced.

[0018] Step 2: Weld the main reinforcement bars and web waist bars of the web to the web stirrups, and weld the crossbeams to the web stirrups according to the spacing and position required by the design.

[0019] Step 3: Rotate the positioning bolt to loosen the extrusion block, and at the same time slide the positioning component to the designed position to facilitate the placement of the bellows.

[0020] Step 4: Place and install the corrugated pipes according to the positions of the crossbeams and positioning components.

[0021] Step 5: Determine the spacing between the two corrugated pipes and the thickness of the protective layer of the corrugated pipes in the design. Adjust the position of the positioning component according to the design requirements to change the position of the corrugated pipes. At the same time, rotate the positioning bolts to fix the position of the positioning component and ensure accurate positioning of the corrugated pipes.

[0022] Step 6: Fit the U-shaped steel bar onto the corrugated pipe and weld it to the crossbeam for fixation.

[0023] Step 7: Rotate the positioning bolt to move the extrusion block away from the crossbeam, and remove the positioning assembly for reuse.

[0024] Compared with the prior art, the present invention has the following beneficial technical effects:

[0025] This invention provides support for the bottom of the corrugated pipe through the crossbeam reinforcement; it also stabilizes and positions the corrugated pipe through the U-shaped steel bars; the positioning component allows for easy adjustment of the corrugated pipe's position before welding the U-shaped steel bars, ensuring that the installation position meets design requirements; and the rotating block within the positioning component ensures that the corrugated pipe remains well-supported even when tilted, facilitating easy adjustment of the positioning component for proper positioning.

[0026] This invention provides a device for conveniently fixing corrugated pipes in cast-in-place box girders. The positioning bars of the corrugated pipes in the cast-in-place box girders are fixed in a U-shape, which is easier to operate than the grid arrangement, can improve the efficiency of corrugated pipe construction, and also save steel bars and improve economic benefits. Attached Figure Description

[0027] Figure 1 This is a front view of a device for conveniently fixing corrugated pipes in cast-in-place box girders;

[0028] Figure 2 This is a side view of a device for conveniently fixing the corrugated pipes of a cast-in-place box girder;

[0029] Figure 3 This is a top view of a device for conveniently fixing the corrugated pipes of a cast-in-place box girder;

[0030] Figure 4 This is a side view of the bellows in its horizontal position;

[0031] Figure 5 yes Figure 4 A bottom view;

[0032] Figure 6 yes Figure 4 A schematic diagram of the positioning component;

[0033] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure;

[0034] Figure 8 yes Figure 6 Disassembly structure diagram;

[0035] Figure 9 This is a side view of the bellows at its tilted position;

[0036] Figure 10 yes Figure 9 A bottom view;

[0037] Figure 11 yes Figure 9 A schematic diagram of the positioning component.

[0038] Figure label:

[0039] 1. Web stirrups; 2. Web main reinforcement; 3. Web waist reinforcement; 4. Cross reinforcement; 5. Corrugated pipe; 6. U-shaped reinforcement;

[0040] 7. Positioning component; 701. Moving block; 702. Positioning bolt; 703. Pressing block; 704. Mounting block; 705. Fixed column; 706. Rotating block; 707. Fixed block; 708. Slide groove; 709. Sliding block; 710. Support block; 711. First arc groove; 712. Guide block; 713. Guide groove; 714. Second arc groove; 715. Cavity; 716. Limiting plate; 717. Connecting rod; 718. Spring. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0043] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Example

[0047] Please see Figures 1 to 3 This invention proposes a device for conveniently fixing the corrugated pipe of a cast-in-place box girder, comprising a main frame, multiple sets of web stirrups 1, multiple sets of web main reinforcement 2 vertically installed inside the web stirrups 1, and multiple sets of web waist reinforcement 3 horizontally sleeved outside the web stirrups 1. The web main reinforcement 2 and web waist reinforcement 3 are welded to the web stirrups 1 to ensure structural stability. The web stirrups 1, web main reinforcement 2, and web waist reinforcement 3 are all made of steel bars with a diameter of 16mm.

[0048] Meanwhile, the aforementioned device includes crossbeams 4 fixedly connected to the web stirrups 1. Multiple sets of corrugated pipes 5 are placed on the crossbeams 4, which support the bottom of the corrugated pipes 5. U-shaped steel bars 6 are also installed on the crossbeams 4 to fix the corrugated pipes 5. The U-shaped steel bars 6 are welded to the crossbeams 4 to fix the position of the corrugated pipes 5. Both the crossbeams 4 and the U-shaped steel bars 6 are made of steel bars with a diameter of 12mm. The crossbeams 4 are welded to the side of the web stirrups 1 to support the bottom of the corrugated pipes 5. In the horizontal position of the corrugated pipes 5, the crossbeams 4 are evenly distributed, with three sets of web stirrups 1 between two sets of crossbeams 4; in the inclined position of the corrugated pipes 5, the crossbeams 4 are also evenly distributed, with two sets of web stirrups 1 between two sets of crossbeams 4. This ensures that the corrugated pipes 5 are placed stably, and the crossbeams 4 provide strong support for the corrugated pipes 5.

[0049] Furthermore, such as Figure 4-11As shown, the above-mentioned device also includes a positioning component 7 for positioning the corrugated pipe 5 before the installation of the U-shaped reinforcing bar 6. The positioning component 7 is sleeved on the outside of the crossbeam 4 and can adapt to the bending of the corrugated pipe 5 by having both horizontal and inclined states. The positioning component 7 includes a movable block 701 sleeved on the outer ring of the crossbeam 4. Two sets of positioning bolts 702 are threaded onto the movable block 701, which can move along its own length direction when the positioning bolts 702 rotate. One end of the positioning bolt 702 is rotatably connected to a pressing block 703, which drives the pressing block 703 to move away from or towards the crossbeam 4 when the positioning bolt 702 rotates. One side of the pressing block 703 is in contact with the outer ring of the crossbeam 4. The arc surfaces of the movable block 701 and the pressing block 703 cooperate, allowing the positioning component 7 to slide entirely on the crossbeam 4 after being in contact with the surface of the crossbeam 4. Two sets of guide blocks 712 are installed in the movable block 701. The bottom of the pressing block 703 has a guide groove 713 corresponding to the guide block 712. The guide block 712 is slidably connected in the guide groove 713. Both the guide block 712 and the guide groove 713 are L-shaped structures. The top of both the movable block 701 and the pressing block 703 has a second arc-shaped groove 714. When the pressing block 703 is moved by the positioning bolt 702, it can be guided by the guide block 712 to make its movement smooth.

[0050] Furthermore, the positioning component 7 also includes a mounting block 704 fixedly connected to the bottom of the moving block 701. A fixing post 705 is fixedly connected to the mounting block 704, and a rotating block 706 is rotatably connected to the outer ring of the fixing post 705, allowing the rotating block 706 to rotate about the fixing post 705 as an axis, thereby causing the positioning component 7 to switch to an inclined state. Both ends of the rotating block 706 are fixedly connected to fixing blocks 707. A sliding groove 708 is formed in the fixing block 707, and a slider 709 is provided in the sliding groove 708. The slider 709 is slidably connected in the sliding groove 708, and a support block 710 is fixedly connected to the top of the slider 709, allowing the support block 710 to move closer to or further away from the fixing block 707, thus changing the height of the support block 710 in the inclined state. The top of the support block 710 has a first arc-shaped groove 711 corresponding to the curved surface of the bellows 5, which facilitates the support block 710 in supporting the bellows 5. The fixing block 707 also has two sets of cavities 715, in which a limiting plate 716 is slidably connected. A connecting rod 717 is fixedly connected to the top of the limiting plate 716, which prevents the connecting rod 717 from completely detaching from the fixing block 707. One end of the connecting rod 717 is fixedly connected to the support block 710, allowing the support block 710 to move under the limiting action of the connecting rod 717. A spring 718 is also provided in the cavity 715, with one end fixedly connected to the limiting plate 716. The spring 718 releases elastic force so that the first arc-shaped groove 711 can better fit the surface of the bellows 5. At this time, the positioning component 7 can support and position the bellows 5 whether it is in a horizontal or inclined position.

[0051] In this embodiment, the web stirrups 1, web main bars 2, web waist bars 3, crossbar bars 4, and U-shaped bars 6 are first fabricated to size upon arrival at the site and then mass-produced. The web main bars 2 and web waist bars 3 are welded together with the web stirrups 1 by electric welding, resulting in a stable overall structure. The crossbar bars 4 are welded together with the web stirrups 1 according to the design requirements in terms of spacing and position. In the horizontal position of the corrugated pipe 5, the crossbar bars 4 are evenly distributed, with three sets of web stirrups 1 between two sets of crossbar bars 4; in the inclined position of the corrugated pipe 5, the crossbar bars 4 are also evenly distributed, with two sets of web stirrups 1 between two sets of crossbar bars 4. The positioning bolt 702 is rotated, causing the positioning bolt 702 to move the pressing block 703 away from the crossbar bars 4. At this time, the moving block 701 and the pressing block 703 are still fitted around the outer ring of the crossbar bars 4 and will not fall off, but they do not compress the crossbar bars 4, so the positioning assembly 7 can move as a whole. The positioning component 7 can be slidably moved to the designed position, facilitating the placement of the corrugated pipe 5. The corrugated pipe 5 can be placed and installed according to the positions of the crossbeam 4 and the positioning component 7.

[0052] During placement, with the bellows 5 in an inclined position, its surface is pressed into the first arc-shaped groove 711. Because the bellows 5 is inclined, this causes the rotating block 706 to rotate around the fixed column 705. Simultaneously, the spring 718 releases its elastic force, causing the support block 710 to approach the bellows 5, at which point the first arc-shaped groove 711 is in contact with the surface of the bellows 5. When the bellows 5 is pressed down, it causes the slider 709, fixedly connected to the bottom of the support block 710, to slide in the groove 708. At this time, the support block 710 moves under the limiting action of the connecting rod 717, while the first arc-shaped groove 711 remains in contact with the surface of the bellows 5. Therefore, the bellows 5 can be placed relatively stably, and the crossbeam 4 provides strong support for the bellows 5.

[0053] At this point, it is necessary to determine the spacing between the two corrugated pipes 5 and the thickness of the protective layer of the corrugated pipe 5 in the design. The position of the positioning component 7 needs to be adjusted. The position of the positioning component 7 can be adjusted according to the design requirements to change the position of the corrugated pipe 5, ensuring accurate positioning. After positioning, the positioning bolt 702 can be rotated to bring the pressing block 703 closer to the crossbeam 4. At this time, the moving block 701 and the pressing block 703 firmly press against the crossbeam 4, fixing the position of the positioning component 7. Finally, the U-shaped steel bar 6 can be fitted onto the corrugated pipe 5 and welded to the crossbeam 4. After the U-shaped steel bar 6 is welded, the positioning bolt 702 can be rotated to move the pressing block 703 away from the crossbeam 4, allowing the positioning component 7 to be removed from the crossbeam 4 for reuse.

[0054] A construction method for a device that facilitates fixing corrugated pipes in cast-in-place box girders includes the following steps:

[0055] Step 1: First, fabricate the web stirrups 1, web main bars 2, web waist bars 3, cross bars 4, and U-shaped bars 6 to the required lengths upon arrival at the site, and then mass-produce them.

[0056] Step 2: Weld the main reinforcement bars 2 and web waist bars 3 to the web stirrups 1, and weld the crossbeam bars 4 to the web stirrups 1 according to the design requirements of spacing and position.

[0057] Step 3: Rotate the positioning bolt 702 to loosen the compression block 703, and at the same time slide the positioning component 7 to the designed position to facilitate the placement of the bellows 5.

[0058] Step 4: Place and install the corrugated pipe 5 according to the positions of the cross brace 4 and the positioning component 7.

[0059] Step 5: Determine the spacing between the two corrugated pipes 5 and the thickness of the protective layer of the corrugated pipe 5 in the design. Adjust the position of the positioning component 7 according to the design requirements to change the position of the corrugated pipe 5. At the same time, rotate the positioning bolt 702 to fix the position of the positioning component 7 and ensure that the positioning of the corrugated pipe 5 is accurate.

[0060] Step 6: Fit the U-shaped steel bar 6 onto the corrugated pipe 5 and weld it to the crossbeam 4 for fixation.

[0061] Step 7: Rotate the positioning bolt 702 to move the pressing block 703 away from the crossbeam 4, and remove the positioning component 7 for reuse.

[0062] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A device for conveniently fixing corrugated pipes in cast-in-place box girders, characterized in that, include: The main frame includes multiple sets of web stirrups (1), multiple sets of web main bars (2) vertically installed inside the web stirrups (1), and multiple sets of web waist bars (3) horizontally sleeved outside the web stirrups (1). A crossbeam (4) is fixedly connected to the web stirrup (1). Multiple sets of corrugated pipes (5) are placed on the crossbeam (4). U-shaped steel bars (6) are also installed on the crossbeam (4) to fix the corrugated pipes (5). A positioning component (7) is used to position the corrugated pipe (5) before the installation of the U-shaped reinforcing bar (6). The positioning component (7) is sleeved on the outside of the crossbeam (4) and can adapt to the bending of the corrugated pipe (5). The positioning component (7) has two states, horizontal and inclined, to accommodate the corrugated pipe (5). The positioning component (7) includes a moving block (701) sleeved on the outer ring of the crossbeam (4). Multiple sets of positioning bolts (702) are threaded onto the moving block (701). One end of the positioning bolt (702) is rotatably connected to a pressing block (703). The pressing block (703) has... One side is attached to the outer ring of the cross brace (4). The positioning component (7) also includes an installation block (704) fixedly connected to the bottom of the moving block (701). A fixing column (705) is fixedly connected in the installation block (704). A rotating block (706) is rotatably connected to the outer ring of the fixing column (705). Both ends of the rotating block (706) are fixedly connected to fixing blocks (707). A sliding groove (708) is provided in the fixing block (707). A slider (709) is provided in the sliding groove (708). A support block (710) is fixedly connected to the top of the slider (709).

2. The device for conveniently fixing the corrugated pipe of a cast-in-place box girder according to claim 1, characterized in that, The crossbeams (4) are welded to the side of the web stirrups (1) to support the bottom of the corrugated pipe (5); in the horizontal position of the corrugated pipe (5), the crossbeams (4) are distributed at equal intervals, with three sets of web stirrups (1) between two sets of crossbeams (4); in the inclined position of the corrugated pipe (5), the crossbeams (4) are also distributed at equal intervals, with two sets of web stirrups (1) between two sets of crossbeams (4).

3. The device for conveniently fixing the corrugated pipe of a cast-in-place box girder according to claim 1, characterized in that, The slider (709) is slidably connected in the groove (708), and the top of the support block (710) is provided with a first arc groove (711) corresponding to the surface of the bellows (5).

4. The device for conveniently fixing the corrugated pipe of a cast-in-place box girder according to claim 1, characterized in that, The movable block (701) is equipped with multiple sets of guide blocks (712), and the bottom of the extrusion block (703) is provided with a guide groove (713) corresponding to the guide block (712). The guide block (712) is slidably connected in the guide groove (713). Both the guide block (712) and the guide groove (713) are L-shaped structures.

5. The device for conveniently fixing the corrugated pipe of a cast-in-place box girder according to claim 1, characterized in that, The top of both the moving block (701) and the pressing block (703) is provided with a second arc-shaped groove (714).

6. The device for conveniently fixing the corrugated pipe of a cast-in-place box girder according to claim 1, characterized in that, The fixing block (707) also has multiple cavities (715), in which a limiting plate (716) is slidably connected. A connecting rod (717) is fixedly connected to the top of the limiting plate (716), and one end of the connecting rod (717) is fixedly connected to the support block (710).

7. The device for conveniently fixing the corrugated pipe of a cast-in-place box girder according to claim 6, characterized in that, A spring (718) is also provided in the cavity (715), and one end of the spring (718) is fixedly connected to the limiting plate (716).

8. A construction method for a device for conveniently fixing corrugated pipes of cast-in-place box girders according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: First, fabricate the web stirrups (1), web main bars (2), web waist bars (3), cross bars (4), and U-shaped bars (6) to the required lengths upon arrival at the site, and then mass-produce them. Step 2: Weld the main reinforcement (2) and web waist reinforcement (3) to the web stirrups (1), and weld the crossbeam reinforcement (4) to the web stirrups (1) according to the spacing and position required by the design. Step 3: Rotate the positioning bolt (702) to loosen the extrusion block (703), and at the same time slide the positioning component (7) to the design position to facilitate the placement of the bellows (5); Step 4: Place and install the corrugated pipe (5) according to the positions of the crossbeam (4) and the positioning component (7); Step 5: Determine the spacing between the two corrugated pipes (5) and the thickness of the protective layer of the corrugated pipe (5) in the design. Adjust the position of the positioning component (7) according to the design requirements to change the position of the corrugated pipe (5). At the same time, rotate the positioning bolt (702) to fix the position of the positioning component (7) and ensure that the positioning of the corrugated pipe (5) is accurate. Step 6: Fit the U-shaped steel bar (6) onto the corrugated pipe (5) and weld it to the crossbeam (4) for fixation; Step 7: Rotate the positioning bolt (702) to move the pressing block (703) away from the crossbeam (4), and remove the positioning assembly (7) for reuse.

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