Large-span bridge precast slab

Abstract

The utility model discloses a long-span bridge precast slab, and belongs to the technical field of civil engineering. Comprising a top plate, webs are arranged on the two sides of the bottom of the top plate, a bottom plate is arranged at the bottoms of the webs, multiple tensioning assemblies are arranged in the webs, and multiple positioning assemblies are arranged on the side wall of the top plate. The anti-pressure capability of the bridge precast slab is enhanced through the spiral ribs, local cracking damage is prevented, the phenomenon that the web cracks due to stress concentration is avoided through the anchor bearing plates, the clamping rings are clamped in the clamping grooves in the outer walls of the circumferences of the clamping pieces, the two clamping pieces are conveniently spliced, installation is easier and more convenient, a steel strand is clamped to prevent the steel strand from moving inwards, and the service life of the bridge precast slab is prolonged. And when the large-span bridge precast slabs are spliced, dislocation is prevented through the positioning assemblies, and connection is more stable. According to the structural design, the prestress of the bridge is sufficient, the structure is not prone to cracking, a steel bar tensioning structure is convenient to install, and prefabricated slabs are convenient to position and splice.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, and more particularly to a prefabricated plate for a long-span bridge. Background Art

[0002] Lattice reinforcement technology is a slope reinforcement technology that uses mortared blocks, cast-in-place reinforced concrete or precast prestressed concrete to protect the slope surface and fix it with anchor rods or cables. At present, the construction process of cast-in-place frame lattice beams is as follows: construction preparation → steel bar production and installation → formwork installation → concrete mixing and transportation → concrete pouring → formwork removal → concrete curing.

[0003] The patent document with publication number CN216712706U in the prior art provides a bridge prefabricated panel. The device first rotates and opens the second prefabricated panel and the fourth prefabricated panel to the required angle, and supports the second prefabricated panel and the fourth prefabricated panel by rotating the support assembly connected to the second prefabricated panel and the fourth prefabricated panel. There is no need to use a separate template to support them. After use, the support assembly can also be fixed on the second prefabricated panel and the fourth prefabricated panel for subsequent use.

[0004] Although this device has many beneficial effects, the following problems still exist: during the use of this device, the prestressing of the bridge is insufficient, which can easily cause structural cracking and make it inconvenient to install the steel tensioning structure; secondly, during the use of this device, the prefabricated panels are easily misaligned when splicing, which needs to be improved. In view of this, we propose a large-span bridge prefabricated panel. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of the utility model is to provide a large-span prefabricated bridge panel to solve the problems raised in the above background technology that the existing bridge prestressing is insufficient and easily causes structural cracking, is inconvenient to install the steel bar tensioning structure, and is easy to dislocate when splicing prefabricated panels.

[0007] 2. Technical solution

[0008] A prefabricated plate for a large-span bridge comprises a top plate, web plates are provided on both sides of the bottom of the top plate, a bottom plate is provided at the bottom of the web plate, a plurality of tensioning components are provided inside the web plate, the tensioning components comprise a bellows, spiral ribs are sleeved at both ends of the circumferential outer wall of the bellows, anchor pads are provided at both ends of the bellows, anchor plates are provided on the side walls of the anchor pads, a plurality of clips are clamped on the side walls of the anchor plates, a slot is provided on the circumferential outer wall of the clips, a clamping ring is clamped on the circumferential outer wall of the slot, a plurality of steel strands are provided inside the bellows, and a plurality of positioning components are provided on the side walls of the top plate.

[0009] Preferably, the positioning assembly includes a positioning groove, a through hole is provided on the top of the top plate, a plurality of positioning blocks are provided on the other side wall of the top plate, and a plurality of connecting grooves are provided on the top of the positioning blocks.

[0010] Preferably, the anchor plate is made of steel alloy, and the clip is conical.

[0011] Preferably, the size and position of the positioning groove match the size and position of the positioning block, and the position of the through hole matches the position of the connecting groove.

[0012] Preferably, a limiting plate is provided on the side wall of the anchor plate, and a grouting hole is opened on the top of the side wall of the anchor pad.

[0013] Preferably, ribs are provided on both sides of the bottom of the top plate, and the height of the ribs close to one end of the web is greater than the height of the other end.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model uses spiral reinforcement to enhance the compressive strength of the bridge precast plate, preventing local cracking and damage, and uses anchor pads to prevent stress concentration from causing cracks in the web. By clamping the clamping ring into the clamping groove on the outer wall of the clamping piece, it is easy to splice the two clamping pieces, making installation simpler and more convenient, thereby clamping the steel strand to prevent the steel strand from moving inward and increasing the prestressing force.

[0017] Secondly, when splicing prefabricated panels of a large-span bridge, the positioning blocks on the side walls of the top panels are inserted into the positioning grooves of the adjacent side walls of the top panels to prevent dislocation, and adhesive is injected into the connection grooves through the through holes to make the connection more stable. The structural design of the utility model has sufficient prestressing force on the bridge, and the structure is not easy to crack, which facilitates the installation of the steel tensioning structure and the positioning and splicing of the prefabricated panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a partial structural diagram of the tensioning component of the utility model;

[0020] Figure 3 This is a schematic diagram of the partial structure of the tensioning component of the present utility model;

[0021] Figure 4 It is a schematic diagram of the partial structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the bottom of the overall structure of the utility model;

[0023] Explanation of the numbers in the figure: 1. Top plate; 2. Web plate; 3. Bottom plate; 4. Tensioning assembly; 5. Positioning assembly; 6. Rib plate; 401. Bellows; 402. Spiral reinforcement; 403. Anchor plate; 404. Anchor plate; 405. Clip; 406. Slot; 407. Snap ring; 408. Steel strand; 409. Limit plate; 410. Grouting hole; 501. Positioning groove; 502. Through hole; 503. Positioning block; 504. Connecting groove. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, “plurality” means two or more, unless otherwise clearly defined.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0027] See also Figure 1-5 ,The utility model provides a technical solution:

[0028] A prefabricated plate for a large-span bridge comprises a top plate 1, with web plates 2 fixed on both sides of the bottom of the top plate 1, a bottom plate 3 fixed on the bottom of the web plate 2, a plurality of tensioning components 4 fixed inside the web plate 2, the tensioning components 4 comprising a bellows 401, spiral ribs 402 sleeved on both ends of the circumferential outer wall of the bellows 401, anchor pads 403 welded to both ends of the bellows 401, anchor plates 404 welded to the side walls of the anchor pads 403, a plurality of clips 405 clamped to the side walls of the anchor plates 404, a slot 406 is provided on the circumferential outer wall of the clips 405, a snap ring 407 is clamped to the circumferential outer wall of the slot 406, a plurality of steel strands 408 sleeved inside the bellows 401, and a plurality of positioning components 5 fixed to the side walls of the top plate 1. The utility model enhances the compressive resistance of the bridge precast slab by using the spiral reinforcement 402 to prevent local cracking and damage, avoids the concentration of force that may cause cracks in the web 2 by using the anchor plate 403, and facilitates the splicing of the two clips 405 by clamping the clamping ring 407 into the clamping groove 406 on the circumferential outer wall of the clip 405, making the installation simpler and more convenient, thereby clamping the steel strand 408 to prevent the steel strand 408 from moving inward, thereby increasing the prestress.

[0029] Specifically, the positioning assembly 5 includes a positioning groove 501, a through-hole 502 at the top of the top panel 1, and multiple positioning blocks 503 fixed to the other sidewall of the top panel 1. Multiple connecting grooves 504 are defined on the top of the positioning blocks 503. When splicing precast panels for a long-span bridge, the positioning blocks 503 on the sidewall of the top panel 1 are inserted into the positioning grooves 501 on the sidewall of the adjacent top panel 1 to prevent misalignment. Adhesive is then injected into the connecting grooves 504 through the through-holes 502 to further secure the connection.

[0030] Furthermore, the anchor plate 403 is made of steel alloy and the clip 405 is tapered. The anchor plate 403 made of steel alloy has a higher hardness and the tapered clip 405 is better clamped into the hole on the side wall of the anchor plate 404.

[0031] It is worth noting that the size and position of the positioning groove 501 match those of the positioning block 503, and the position of the through hole 502 matches that of the connecting groove 504. The through hole 502 matching the position of the connecting groove 504 facilitates the adhesive to fully enter the connecting groove 504 when injected.

[0032] It is worth noting that the side wall of the anchor plate 404 is clamped with a limit plate 409, and the top of the side wall of the anchor plate 403 is provided with a grouting hole 410. The limit plate 409 prevents the clip 405 from detaching, and cement mortar is injected through the grouting hole 410 to fix the tensioning assembly 4.

[0033] In addition, ribs 6 are fixed on both sides of the bottom of the top plate 1. The height of the ribs 6 near one end of the web 2 is greater than the height of the other end. The ribs 6 improve the structural strength of the bridge precast slab and reduce the weight.

[0034] Working principle: When this device is needed for the installation of prefabricated panels for long-span bridges, ribs 6 are installed on both sides of the bottom of the top plate 1, the bellows 401 is installed inside the web 2, the steel strand 408 is passed through the bellows 401, the spiral ribs 402 are sleeved on both ends of the outer circumference of the bellows 401, the anchor pads 403 are welded to both ends of the bellows 401, the clamping ring 407 is clamped in the clamping groove 406 of the outer circumference of the clip 405, and then sleeved on the steel strand 408. 8 circumferential outer wall, splice another clip 405 and insert it into the hole of the side wall of the anchor plate 404, tension the steel strand 408 to the predetermined tension through the hydraulic device, install the limit plate 409, inject cement mortar into the grouting hole 410 to complete the packaging, and when splicing the prefabricated panels of a large-span bridge, insert the positioning block 503 of the side wall of the top plate 1 into the positioning groove 501 of the side wall of the adjacent top plate 1, inject adhesive into the through hole 502 and into the connecting groove 504, and the connection is completed after solidification.

[0035] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-span bridge prefabricated plate, comprising a top plate (1), characterized in that: The top plate (1) is provided with webs (2) on both sides of the bottom, and a bottom plate (3) is provided at the bottom of the web (2). A plurality of tensioning components (4) are provided inside the web (2), and the tensioning components (4) include a bellows (401). Spiral ribs (402) are sleeved on both ends of the circumferential outer wall of the bellows (401). Anchor pads (403) are provided at both ends of the bellows (401). Anchor plates (404) are provided on the side walls of the anchor plates (403). A plurality of clips (405) are clamped on the side walls of the anchor plates (404). A clamping groove (406) is provided on the circumferential outer wall of the clips (405). A clamping ring (407) is clamped on the circumferential outer wall of the clamping groove (406). A plurality of steel strands (408) are provided inside the bellows (401), and a plurality of positioning components (5) are provided on the side walls of the top plate (1).

2. The long-span bridge precast panel according to claim 1 is characterized in that: The positioning assembly (5) includes a positioning groove (501), a through hole (502) is provided on the top of the top plate (1), a plurality of positioning blocks (503) are provided on the other side wall of the top plate (1), and a plurality of connecting grooves (504) are provided on the top of the positioning blocks (503).

3. The long-span bridge precast panel according to claim 2 is characterized in that: The anchor plate (403) is made of steel alloy, and the clip (405) is conical.

4. The long-span bridge precast panel according to claim 3 is characterized in that: The size and position of the positioning groove (501) match the size and position of the positioning block (503), and the position of the through hole (502) matches the position of the connecting groove (504).

5. The long-span bridge precast panel according to claim 4 is characterized in that: The side wall of the anchor plate (404) is provided with a limiting plate (409), and the top of the side wall of the anchor pad (403) is provided with a grouting hole (410).

6. The long-span bridge precast panel according to claim 5, characterized in that: Ribs (6) are provided on both sides of the bottom of the top plate (1), and the height of the ribs (6) at one end close to the web (2) is greater than the height at the other end.

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