A temporary fixing device for prefabricated hanging plates of a crash barrier and a construction method

Abstract

The application provides a crash barrier prefabricated hanging plate temporary fixing device and a construction method, which are used in the technical field of municipal construction; the device comprises a clamping assembly and a pulling assembly; the clamping assembly is used for clamping adjacent prefabricated hanging plates; the pulling assembly is connected to the clamping assembly and is used for pulling and fixing the prefabricated hanging plates to the main body of a road or bridge; the clamping assembly can effectively prevent the loosening and deviation of single hanging plates; the pulling assembly and the clamping assembly are matched with each other, the prefabricated hanging plates are reliably fixed to the main body of the road or bridge, the overall stability of the prefabricated hanging plates is further improved, and the misalignment of the prefabricated hanging plates is effectively avoided; the overall structure is simple and easy to manufacture, and can be used repeatedly.

Description

Technical Field

[0001] This invention belongs to the field of municipal construction technology, and in particular relates to a temporary fixing device and construction method for prefabricated hanging panels for crash barriers. Background Technology

[0002] Currently, an increasing number of bridge and road construction projects are adopting a structure for their crash barriers that consists of precast panels on the outside and cast-in-place concrete on the inside. This not only ensures safety requirements but also improves the appearance of the crash barriers. However, the construction process for this structure is complex. It requires first installing the precast panels, then binding some of the reinforcing steel bars for the inner cast-in-place structure, followed by pre-embedding the electrical and mechanical wiring conduits within the barrier, then finally binding the reinforcing steel bars, and finally erecting the formwork and pouring concrete. Due to the numerous overlapping construction steps, the precast panels are prone to shifting and misalignment during this process, requiring rework and adjustments. This severely restricts the construction progress and affects the appearance quality of the crash barriers. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a temporary fixing device and construction method for prefabricated hanging panels of crash barriers, which can effectively avoid the phenomenon of misalignment of prefabricated hanging panels.

[0004] The technical solution adopted in this invention is: a temporary fixing device for prefabricated hanging panels of crash barriers, comprising:

[0005] Clamping assembly for clamping adjacent precast panels;

[0006] A tie-in assembly, connected to the clamping assembly, is used to tie and fix the prefabricated hanging panel to the main body of the road and bridge.

[0007] Furthermore, the clamping assembly includes:

[0008] The first clamping member has a first clamping surface;

[0009] The second clamping member has a second clamping surface that can be close to or away from the first clamping surface;

[0010] The first clamping surface and the second clamping surface are respectively used to fit and clamp the inner and outer sidewalls of the top of the adjacent prefabricated hanging plate.

[0011] Furthermore, the clamping assembly also includes a pressing member, the two ends of which are respectively connected to the first clamping member and the second clamping member, for pressing against the top surface of the adjacent prefabricated hanging plate.

[0012] Furthermore, the second clamping member includes a substrate and a pressing member, the substrate being connected to the pressing member; the pressing member is movably disposed on the substrate, and the second clamping surface is disposed on the side of the pressing member facing the first clamping member.

[0013] Furthermore, the second clamping member also includes an adjusting screw, which is threadedly connected to the second clamping member, and the pressing member is connected to one end of the adjusting screw that passes through the inner side of the substrate.

[0014] Furthermore, the second clamping surface is provided with a flexible protective pad.

[0015] Furthermore, the tie assembly includes a tie member, a first fixing member, and a second fixing member. The first fixing member is disposed in the clamping assembly, and the second fixing member is embedded in the main body of the road and bridge. The two ends of the tie member are detachably connected to the first fixing member and the second fixing member, respectively.

[0016] Furthermore, the tie member includes a turnbuckle and a tie bar, one end of the turnbuckle is connected to the first fixing member through the tie bar, and the other end is connected to the second fixing member through the tie bar.

[0017] Furthermore, the first fixing member is disposed on the side of the first clamping member opposite to the first clamping surface.

[0018] A method for temporarily fixing prefabricated panels for crash barriers, using the aforementioned temporary fixing device for prefabricated panels for crash barriers, includes the following steps:

[0019] Hoist the prefabricated panels to the designated positions;

[0020] Install the clamping assembly on the top of the adjacent prefabricated hanging plate;

[0021] Tighten the adjusting screw to push the pressing component to clamp the adjacent prefabricated hanging plate;

[0022] Install the tie rod to the first and second fixing members, and adjust the tie rod to tighten the prefabricated hanging plate;

[0023] Before pouring the concrete guardrail, remove the clamping assembly, the first fixing member, and the tie member.

[0024] The advantages and positive effects of this invention are:

[0025] (1) By setting up clamping components, the prefabricated panels can be locked together into an integral structure after the prefabricated panels are temporarily in place, which can effectively prevent the loosening or displacement of a single panel. Then, by using the tie components and clamping components in cooperation, the prefabricated panels can be reliably fixed to the main body of the road and bridge. The tie constraints further enhance the overall stability of the prefabricated panels, which can effectively prevent the misalignment of the prefabricated panels and greatly reduce the maintenance costs and construction period losses caused by rework and correction in the later stage.

[0026] (2) The overall structure is simple, easy to manufacture, and can be reused. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the prefabricated hanging panel position according to a specific embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of a specific embodiment of the present invention;

[0029] Figure 3 This is a front view of a specific embodiment of the present invention;

[0030] Figure 4 This is a top view of a specific embodiment of the present invention.

[0031] In the picture:

[0032] 1. First clamping component; 11. First clamping surface; 2. Second clamping component; 21. Base plate; 22. Pressing component; 221. Second clamping surface; 23. Adjusting screw; 24. Flexible protective pad; 3. Top pressing component; 4. Tie component; 41. Turnbuckle; 42. Tie bar; 5. First fixing component; 6. Second fixing component; 7. Precast hanging plate; 8. Concrete guardrail; 9. Box girder cantilever. Detailed Implementation

[0033] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0034] Before introducing the technical solution of this application, let's go over the technical issues in related technologies in detail.

[0035] like Figure 1 As shown, crash barriers in bridge and road engineering are the main structures ensuring vehicle safety. They absorb impact energy through deformation, correct vehicle trajectory, prevent vehicles from running off the roadbed or bridge surface, and avoid major safety accidents. Crash barriers are typically installed after the main road and bridge structure is completed. The main road and bridge structure includes the roadbed, the main beams of the bridge, and box girders. Crash barriers consist of precast hanging panels 7 and cast-in-place concrete guardrails 8. Taking a bridge box girder as an example, the box girder has cantilever arms 9 at both ends. The inner side of the precast hanging panels 7 has overlapping protrusions that can overlap the cantilever ends of the box girder cantilever arms 9. During construction, the precast hanging plate 7 needs to be temporarily fixed before the construction of the concrete guardrail 8 can proceed. This includes multiple processes such as the first rebar binding, installation of electromechanical pipelines, the second rebar binding, formwork erection, and concrete pouring. During the rebar binding, the connecting rebars reserved on the inner side of the precast hanging plate 7 are connected to the rebars of the cast-in-place concrete structure, thereby connecting the precast hanging plate 7 and the concrete guardrail 8 to form a whole. During the construction process, the precast hanging plate 7 is prone to loosening and displacement, eventually forming a misalignment, which affects the overall protective performance and appearance quality of the crash barrier. Rework and adjustment require a lot of time and cost.

[0036] In view of this, in order to solve the above problems, such as Figures 1 to 4 As shown, the present invention proposes a temporary fixing device for prefabricated hanging panels 7 of crash barriers, including a clamping assembly and a tie assembly: wherein, the clamping assembly is used to clamp adjacent prefabricated hanging panels 7; the tie assembly is connected to the clamping assembly and is used to tie and fix the prefabricated hanging panels 7 to the main body of the road and bridge.

[0037] Since the precast panels 7 are directly attached to the main structure of the road and bridge, and there is no connecting structure between adjacent precast panels 7, they are prone to loosening and displacement under load and construction activities of the concrete guardrail 8. This application adds a clamping component, which can lock adjacent panels into a whole structure after the precast panels 7 are temporarily positioned, effectively preventing loosening and displacement of individual panels; then, by the cooperation of the tie component and the clamping component, the precast panels 7 are reliably fixed to the main structure of the road and bridge. The tie constraint further improves the overall stability of the precast panels 7, which can effectively prevent the misalignment of the precast panels 7 and greatly reduce the maintenance costs and construction time losses caused by later rework and correction.

[0038] Furthermore, in this embodiment, the clamping assembly includes a first clamping member 1 and a second clamping member 2, wherein the first clamping member 1 has a first clamping surface 11; the second clamping member 2 has a second clamping surface 221 that can be close to or away from the first clamping surface 11; the first clamping surface 11 and the second clamping surface 221 are respectively used to fit and clamp the inner sidewall and the outer sidewall of the top of the adjacent prefabricated hanging plate 7.

[0039] The clamping assembly aligns the inner and outer walls of adjacent prefabricated hanging panels 7 through the first clamping surface 11 and the second clamping surface 221, effectively preventing a single hanging panel from becoming loose or shifting.

[0040] Specifically, the precast panel 7 has inner and outer sidewalls formed on both sides of its thickness, with the inner sidewall facing the inner side of the road and bridge and the outer sidewall facing the outer side of the road and bridge. By setting the clamping assembly at the top of the joint of adjacent precast panels 7, the first clamping surface 11 simultaneously clamps the inner sidewall of the adjacent precast panel 7, and the second clamping surface 221 simultaneously clamps the outer sidewall of the adjacent precast panel 7. This ensures that the inner and outer sidewalls of the adjacent precast panels 7 are aligned, thereby achieving the connection and fixation of the precast panels 7 in pairs along their arrangement direction, which can effectively prevent the loosening and displacement of a single precast panel 7.

[0041] In this application, the first clamping surface 11 and the second clamping surface 221 can be close to or far from each other, and can be adapted to the thickness of the prefabricated hanging plate 7 to ensure that they can clamp the inner side wall and the outer side wall of the prefabricated hanging plate 7 respectively, and ensure that the adjacent prefabricated hanging plates 7 are stably connected.

[0042] Furthermore, in this embodiment, the clamping assembly also includes a pressing member 3, with its two ends connected to the first clamping member 1 and the second clamping member 2, respectively, for pressing against the top surface of the adjacent prefabricated hanging plate 7. The pressing member 3 can press against the top surface of the adjacent prefabricated hanging plate 7, thereby cooperating with the first clamping member 1 and the second clamping member 2 to limit the adjacent prefabricated hanging plate 7 in three directions, effectively preventing the adjacent prefabricated hanging plate 7 from moving inward or outward or up and down.

[0043] Specifically, the capping component 3 uses the tensioning force of the waste assembly to press against the top surface of the precast slab 7. The precast slab 7, as part of the crash barrier, has a set height, ensuring that its top is higher than the main body of the road and bridge. The clamping assembly is positioned at the top of the precast slab 7, and the waste assembly is tilted as a whole, with its high end connected to the clamping assembly and its low end connected to the main body of the road and bridge. Therefore, the tensioning assembly provides a downward tensioning force to the clamping assembly, thereby causing the capping component 3 to press the precast slab firmly from top to bottom.

[0044] In one specific embodiment, the top end of the first clamping member 1 is connected to the top end of the second clamping member 2 via the pressing member 3, and the three form a clamping space adapted to the prefabricated hanging plate 7; the first clamping surface 11 is adapted to the shape of the inner side wall of the prefabricated hanging plate 7; the second clamping surface 221 is adapted to the shape of the outer side wall of the prefabricated hanging plate 7, and the lower surface of the pressing member 3 is adapted to the shape of the top surface of the prefabricated hanging plate 7.

[0045] In the above embodiments, the first clamping member 1, the second clamping member 2 and the pressing member 3 have a clamping length, which is set along the arrangement direction of the adjacent prefabricated hanging plates 7 and can extend a sufficient length from the joint of the adjacent prefabricated hanging plates 7 to both sides.

[0046] In one specific embodiment, the first clamping member 1 and the pressing member 3 are both plate-shaped structures and are fixedly connected.

[0047] Further, in this embodiment, the second clamping member 2 includes a base plate 21 and a pressing member 22. The base plate 21 is connected to the pressing member 3; the pressing member 22 is movably disposed on the base plate 21, and the second clamping surface 221 is disposed on the side of the pressing member 22 facing the first clamping member 1. Specifically, the pressing member 22 can move relative to the base plate 21, thereby moving closer to or further away from the first clamping member 1 to adjust the distance between the first clamping surface 11 and the second clamping surface 221, ensuring that the two cooperate to clamp the prefabricated hanging plate 7, while facilitating the installation and removal of the clamping assembly.

[0048] Specifically, the substrate 21 has a plate-like structure, and its top end is fixedly connected to the pressing member 3. The substrate 21, the pressing member 3, and the first clamping member 1 are sequentially connected to form an integral structure to provide a stable mounting base for the pressing member 22. The pressing member 22 is movably connected to the substrate 21 and is located between the substrate 21 and the first clamping member 1. The distance between the substrate 21 and the first clamping member 1 is greater than the thickness of the prefabricated hanging plate 7 to ensure that the pressing member 22 has sufficient travel.

[0049] Furthermore, in this embodiment, the second clamping member 2 further includes an adjusting screw 23, which is threadedly connected to the second clamping member 2, and a pressing member 22 is connected to the end of the adjusting screw 23 that penetrates into the inner side of the substrate 21. The adjusting screw 23 is used to adjust the position of the pressing member 22, and drives the pressing member 22 to move through the threaded connection. It can also achieve self-locking, ensuring that the pressing member 22 can stably press the prefabricated hanging plate 7.

[0050] In one specific embodiment, a threaded hole can be provided on the substrate 21, and the adjusting screw 23 has an external thread and passes through the threaded hole; or a through hole can be opened on the base plate, and a fixing bolt is provided on the outside of the through hole, with the adjusting thread passing through the fixing bolt and the through hole in sequence.

[0051] In one specific embodiment, the pressing member 22 adopts a plate-like structure, and the adjusting screw 23 can be welded to the pressing member 22 or detachably connected to the pressing member 22, which is not limited here; the other end of the adjusting screw 23 is provided with a handle to facilitate personnel to turn the adjusting screw 23.

[0052] Furthermore, in this embodiment, the second clamping surface 221 is provided with a flexible protective pad 24. The flexible protective pad 24 flexibly contacts the prefabricated hanging plate 7, avoiding direct rigid contact between the second clamping surface 221 and the inner wall of the prefabricated hanging plate 7, which could cause damage such as squeezing, bumping, and scratches.

[0053] Specifically, the aforementioned flexible protective pad 24 is a rubber pad that is attached to the second clamping surface 221 and covers the entire area of ​​the second clamping surface 221.

[0054] Furthermore, in this embodiment, the tying assembly includes a tying member 4, a first fixing member 5, and a second fixing member 6. The first fixing member 5 is disposed in the clamping assembly, and the second fixing member 6 is pre-embedded in the main body of the road and bridge. The two ends of the tying member 4 are respectively connected to the first fixing member 5 and the second fixing member 6. The first fixing member 5 and the second fixing member 6 are used to connect the tying member 4 so that after the clamping assembly is in place and clamped, the clamping assembly can be connected to the main body of the road and bridge to achieve the tying and fixing of the prefabricated hanging plate 7.

[0055] In one specific embodiment, both the first fixing member 5 and the second fixing member 6 are made of angle steel. The first fixing member 5 is welded to the clamping assembly, and the second fixing member 6 is pre-embedded in the set position of the main body of the road and bridge during the construction of the main body. For example, the main body of the road and bridge is a box girder. The second fixing member 6 is fixed in the set position before the box girder is poured, and is fixed in that position as the box girder is poured.

[0056] Specifically, the first fixing member 5 is connected to the center of the clamping assembly along its length. As the clamping assembly is installed on the adjacent precast hanging plate 7, the joint between the first fixing member 5 and the adjacent precast hanging plate 7 is aligned; the preset position of the second fixing member 6 is also aligned with the position of the joint; the tie member 4 extends laterally along the main road surface, and the precast hanging plate 7

[0057] Specifically, both the first fixing member 5 and the second fixing member 6 are provided with connecting holes. The two ends of the tie member 4 are fixed to the first fixing member 5 and the second fixing member 6 respectively through the connecting holes, realizing a detachable connection. After the concrete guardrail 8 formwork is erected, the clamping assembly, together with the first fixing member 5 and the tie member 4, can be easily removed. The second fixing member 6 can be left in place and can be covered by the road surface structure of the main body of the road and bridge. The clamping assembly, the first fixing member 5, and the tie member 4 can be reused.

[0058] Furthermore, in this embodiment, the tie member 4 includes a turnbuckle 41 and a tie bar 42. The two ends of the turnbuckle 41 are connected to the first fixing member 5 and the second fixing member 6 respectively through the tie bar 42. By setting the turnbuckle 41 and the tie bar 42, the overall length of the tie member 4 can be adjusted, thereby ensuring that the tie member 4 provides appropriate tying force to the clamping assembly, avoiding excessive tying force causing the prefabricated hanging plate 7 to deflect inward, or insufficient tying force causing the prefabricated hanging plate 7 to easily loosen or shift.

[0059] In one specific embodiment, the first fixing member 5 is disposed on the side of the first clamping member 1 opposite to the first clamping surface 11.

[0060] This invention also proposes a temporary fixing construction method for prefabricated anti-collision guardrail panels 7, which uses the aforementioned temporary fixing device for prefabricated anti-collision guardrail panels 7 and includes the following steps:

[0061] S1. Hoist the precast hanging panel 7 to the set position;

[0062] Before construction, the prefabricated hanging panels 7 are pre-arranged to determine the installation position of each prefabricated hanging panel 7. The prefabricated hanging panels 7 are then hoisted one by one to the preset installation position.

[0063] In one specific embodiment, the prefabricated hanging plate 7 overlaps with the end of the cantilever arm 9 of the box girder via an overlapping boss. A second fixing member 6 is pre-embedded on the cantilever arm 9 of the box girder.

[0064] S2. Install the clamping assembly on the top of the adjacent precast hanging plate 7;

[0065] During installation, the joint should be located as close as possible to the center of the clamping assembly to ensure that the capping component 3 fits against the top surface of the prefabricated hanging plate 7.

[0066] S3. Tighten the adjusting screw 23 to push the pressing part 22 to clamp the adjacent precast hanging plate 7;

[0067] S4. Install the tie member 4 onto the first fixing member 5 and the second fixing member 6, and adjust the tie member 4 to tighten the prefabricated hanging plate 7;

[0068] In this application, the tie member 4 can also be used to finely correct the installation tilt angle of the prefabricated hanging panel 7, ensuring that the installation accuracy of the prefabricated hanging panel 7 meets the requirements;

[0069] S5. Before pouring the concrete guardrail 8, remove the clamping components, the first fixing component 5, and the tie component 4.

[0070] The advantages and positive effects of this invention are:

[0071] (1) By setting up clamping components, the prefabricated panels can be locked together into an integral structure after the prefabricated panels are temporarily in place, which can effectively prevent the loosening or displacement of a single panel. Then, by using the tie components and clamping components in cooperation, the prefabricated panels can be reliably fixed to the main body of the road and bridge. The tie constraints further enhance the overall stability of the prefabricated panels, which can effectively prevent the misalignment of the prefabricated panels and greatly reduce the maintenance costs and construction period losses caused by rework and correction in the later stage.

[0072] (2) The overall structure is simple, easy to manufacture, and can be reused.

[0073] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A temporary fixing device for prefabricated hanging panels of crash barriers, characterized in that, include: Clamping assembly for clamping adjacent precast panels; A tie-in assembly, connected to the clamping assembly, is used to tie and fix the prefabricated hanging panel to the main body of the road and bridge.

2. The temporary fixing device for prefabricated hanging panels of the crash barrier according to claim 1, characterized in that: The clamping assembly includes: The first clamping member has a first clamping surface; The second clamping member has a second clamping surface that can be close to or away from the first clamping surface; The first clamping surface and the second clamping surface are respectively used to fit and clamp the inner and outer sidewalls of the top of the adjacent prefabricated hanging plate.

3. The temporary fixing device for prefabricated hanging panels of crash barriers according to claim 2, characterized in that: The clamping assembly further includes a pressing member, the two ends of which are respectively connected to the first clamping member and the second clamping member, for pressing against the top surface of the adjacent prefabricated hanging plate.

4. The temporary fixing device for prefabricated hanging panels of the crash barrier according to claim 3, characterized in that: The second clamping member includes a base plate and a pressing member, the base plate being connected to the pressing member; the pressing member is movably disposed on the base plate, and the second clamping surface is disposed on the side of the pressing member facing the first clamping member.

5. The temporary fixing device for prefabricated hanging panels of crash barriers according to claim 4, characterized in that: The second clamping member further includes an adjusting screw, which is threadedly connected to the second clamping member, and the pressing member is connected to the end of the adjusting screw that passes through the inner side of the substrate.

6. The temporary fixing device for prefabricated hanging panels of crash barriers according to any one of claims 2-5, characterized in that: The second clamping surface is provided with a flexible protective pad.

7. The temporary fixing device for prefabricated hanging panels of crash barriers according to any one of claims 2-5, characterized in that: The tie assembly includes a tie member, a first fixing member, and a second fixing member. The first fixing member is disposed in the clamping assembly, and the second fixing member is embedded in the main body of the road and bridge. The two ends of the tie member are detachably connected to the first fixing member and the second fixing member, respectively.

8. The temporary fixing device for prefabricated hanging panels of crash barriers according to claim 7, characterized in that: The tie member includes a turnbuckle and a tie bar. One end of the turnbuckle is connected to the first fixing member through the tie bar, and the other end is connected to the second fixing member through the tie bar.

9. The temporary fixing device for prefabricated hanging panels of crash barriers according to claim 8, characterized in that: The first fixing member is disposed on the side of the first clamping member opposite to the first clamping surface.

10. A method for temporarily fixing prefabricated hanging panels to crash barriers, characterized in that: The temporary fixing device for prefabricated hanging panels of crash barriers as described in any one of claims 1-9 includes the following steps: Hoist the prefabricated panels to the designated positions; Install the clamping assembly on the top of the adjacent prefabricated hanging plate; Tighten the adjusting screw to push the pressing component to clamp the adjacent prefabricated hanging plate; Install the tie rod to the first and second fixing members, and adjust the tie rod to tighten the prefabricated hanging plate; Before pouring the concrete guardrail, remove the clamping assembly, the first fixing member, and the tie member.

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