Bridge bearing top surface back pouring device

Abstract

The utility model discloses a kind of bridge pier top surface post-pouring devices, belong to bridge construction technical field, including bent cap, bent cap is provided with cushion stone, cushion stone upper portion is provided with support component, support component is provided with embedded steel plate, several connecting steels are provided on embedded steel plate, several connecting steels are connected with T-shaped beam through several connecting holes, several connecting holes are communicated with embedded hole, pearl wool foam template is arranged between embedded steel plate and T-shaped beam, the phenomenon that the service life of bridge is reduced due to the position tolerance of precast beam, cushion stone, support three, support bias, steel plate void or misalignment construction, increase the service life of support, reduce the frequency of bridge replacement support.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, specifically a post-grouting device for the top surface of bridge bearings. Background Technology

[0002] In bridge engineering, the typical process for installing end supports in precast simply supported beams or simply supported to continuous bridge structures is as follows: first, steel plates are pre-embedded at the bottom of the beam, then the precast beam is hoisted and positioned on top of the formed support, and then fixed and connected by welding or other methods.

[0003] Chinese utility model patent CN205443946U discloses a "connection system for precast bridge beams and piers," which solves the connection and installation problem between precast bridge beams and the underlying pier structure. The connection system includes: bridge bearings, a slope leveling frame, and bearing pads. The slope leveling frame is fixedly connected to the bottom surface of the precast bridge beam and is configured as an inclined structure. A horizontal base plate is welded to its lower part, serving as the upper contact surface of the bridge bearing. The lower end of the bearing connects to the bearing pad installed on the pier, thus achieving a multi-layer connection structure of precast beam-bearing-pad. This solution has advantages such as adjustable beam bottom slope, convenient bearing installation, and improved reliability of the fit between the upper and lower structures.

[0004] However, in actual engineering, there will still be positional tolerances in the precast beam bottom plate, slope leveling frame (and bearings), and pad stone forming. The errors and bearing manufacturing errors will still be superimposed to form a large positional tolerance, which will lead to the phenomenon of reduced bridge life due to construction such as bearing bias, steel plate voids or misalignment. It is easy to cause excessive local bearing pressure, functional failure, and shortened service life of the bearings, affecting the overall bridge operation safety. Utility Model Content

[0005] The purpose of this utility model is to provide a post-grouting device for the top surface of a bridge bearing, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A bridge bearing top surface post-grouting device is provided, including a cap beam, on which a pad stone is provided. The device is characterized in that a bearing assembly is provided above the pad stone, and a pre-embedded steel plate is provided on the bearing assembly. A plurality of connecting steel bars are provided on the pre-embedded steel plate, and a T-beam is connected to the plurality of connecting steel bars through a plurality of connecting holes. The plurality of connecting holes are connected to the pre-embedded holes, and a pearl cotton foam template is provided between the pre-embedded steel plate and the T-beam.

[0007] Furthermore, the pearl cotton foam template has a through groove in the middle, which can deform appropriately when the pearl cotton foam template is under pressure, thereby enhancing the tightness of the template edge; effectively filling the gap between the embedded steel plate and the T-beam, thus preventing the grout from leaking through the gap.

[0008] Furthermore, the pearl cotton foam template and the T-beam form a filling gap, which is located below the connection hole. Grout flows out from below the connection hole and fills the gap. After the grout is injected, the filling gap forms a continuous and complete interface, realizing uniform stress on the entire support.

[0009] Furthermore, the height H of the filling gap is 3-5cm. By setting a groutable gap of 3-5cm, the grout can automatically compensate for unevenness or misalignment between the bottom of the beam and the surface of the steel plate during the grouting process, ensuring that the support fits and the steel plate is fully grouted without being suspended.

[0010] Furthermore, the pre-embedded holes include grouting holes and grout outlet holes. Two pre-embedded holes are respectively connected to the grouting holes and the grout outlet holes. Several connecting holes are respectively connected to the grouting holes and the grout outlet holes. By connecting the several connecting holes to the grouting holes and the grout outlet holes, the grout is injected from one side, flows along the inside of the structure, and is discharged from the other side. By setting the grout outlet holes, the grout can squeeze out the residual air while filling the internal space, ensuring that the structure is filled.

[0011] Furthermore, the grouting holes and grout outlet holes are located on both sides of the T-beam. The grouting holes are located on one side of the T-beam, and the grout is injected into the gap between the bottom of the T-beam and the top surface of the support steel plate through the grouting holes. The grout outlet holes are located on the opposite side of the T-beam, and the grout flows laterally along the grouting holes and is discharged from the grout outlet holes.

[0012] Furthermore, the pad stone is provided with a pre-drilled hole, and a support assembly is provided in the pre-drilled hole. The support assembly is installed in the pre-drilled hole and is used to connect the upper T-beam and the pad stone to transfer the structural load.

[0013] Furthermore, the support assembly includes a support steel plate, which is disposed above the pad stone. A plurality of anchor bolts are provided at the bottom of the support steel plate. The anchor bolts pass through the pad stone through pre-drilled holes and are connected to the inside of the cap beam. The support steel plate passes through the pre-drilled holes in the pad stone and through the entire pad stone to be connected to the inside of the cap beam. The anchor bolts pass through the pre-drilled holes in the pad stone and are connected to the inside of the cap beam, thereby achieving the fixation of the support steel plate.

[0014] Furthermore, the cap beam is provided with bolt pre-drilled holes, and anchor bolts are installed in the bolt pre-drilled holes. The bolt pre-drilled holes are used to install anchor bolts. By pre-setting the bolt pre-drilled holes before the cap beam is poured, it can be ensured that the anchor bolts are accurately aligned with the bolt pre-drilled holes at the bottom of the cap beam; drilling errors are avoided and installation accuracy is improved.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The bearing assembly is transported to the top of the pad stone, inserted into the pad stone, and the bearing pad stone and bearing are positioned and installed. Before the T-beam is lowered, a pearl cotton foam template is placed on top of the embedded steel plate. Before the T-beam is lowered, several connecting steel bars are inserted into several pre-embedded holes of the T-beam and temporarily sealed to prevent the connecting steel bars from falling out of the connection holes. Mortar is injected between the pre-embedded steel plate and the bottom of the T-beam through the pre-holes. Grouting material is injected into the pre-embedded holes reserved in the T-beam and led out through the connection holes to the gap formed between the T-beam, the pre-embedded steel plate and the pearl cotton foam template until a stable, bubble-free grouting material appears with one side of the pre-embedded hole. After maintaining this for 30 seconds, grouting is stopped. This can reduce the positional tolerances among the precast beam, pad stone and bearing, which can lead to bearing bias, steel plate detachment or misalignment, and other construction issues that reduce the lifespan of the bridge. It can increase the service life of the bearings and reduce the frequency of bridge bearing replacement. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 A schematic diagram of the overall structure of a bridge bearing top surface post-grouting device; Figure 2 A schematic diagram of the support assembly structure provided by this utility model; Figure 3 A schematic diagram of the pad stone structure provided by this utility model; Figure 4 A schematic diagram of the pearl cotton foam template structure provided by this utility model; Figure 5 A schematic diagram of the T-beam structure provided by this utility model.

[0018] In the diagram: 1. Cap beam; 11. Bolt pre-drilled hole; 2. Pad stone; 21. Pad stone pre-drilled hole; 3. Support assembly; 31. Support steel plate; 32. Anchor bolt; 4. Embedded steel plate; 5. Connecting reinforcing bar; 6. T-beam; 61. Connecting hole; 7. Embedded hole; 71. Grouting hole; 72. Grout outlet hole; 8. Pearl cotton foam template; 81. Through groove; 100. Filling gap. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-5As shown in the embodiment of this utility model, a bridge bearing top surface post-grouting device includes a cap beam 1, a pad stone 2 on the cap beam 1, a bearing assembly 3 above the pad stone 2, a pre-embedded steel plate 4 on the bearing assembly 3, a plurality of connecting steel bars 5 on the pre-embedded steel plate 4, a plurality of connecting steel bars 5 connected to a T-beam 6 through a plurality of connecting holes 61, the connecting steel bars 5 being pre-fixed on the pre-embedded steel plate 4, the lower part of the connecting steel bars 5 being inserted into the pre-reserved connecting holes 61 in the T-beam 6 to form a "pin-type" connection relationship, the plurality of connecting holes 61 being connected to pre-embedded holes 7, a pearl cotton foam template 8 being provided between the pre-embedded steel plate 4 and the T-beam 6, the pearl cotton foam template 8 being placed between the pre-embedded steel plate 4 and the T-beam 6 to play a role in limiting the forming and sealing, ensuring that the mortar is only filled and formed in the designated area during post-grouting; The support assembly 3 is transported to the top of the pad stone 2, inserted into the pad stone 2, and the pad stone 2 and support assembly 3 are positioned and installed. Before the T-beam 6 is lowered, a pearl cotton foam template 8 is placed on top of the embedded steel plate 4. Before the T-beam 6 is lowered, several connecting steel bars 5 are inserted into several pre-embedded holes 7 of the T-beam 6, and temporary sealing is performed to prevent the connecting steel bars 5 from falling out of the connecting holes 61. Mortar is poured between the embedded steel plate 4 and the bottom of the T-beam 6 through the pre-embedded holes 7. Grouting material is injected into the pre-embedded hole 7 and led out through the connecting hole 61 to the gap formed between the T-beam 6, the pre-embedded steel plate 4, and the pearl cotton foam template 8 until a stable, bubble-free grouting material appears with the pre-embedded hole 7 on one side. After maintaining this for 30 seconds, grouting is stopped. This can reduce the positional tolerances among the precast beam, pad stone 2, and bearing, which can lead to bearing bias, steel plate detachment, or misalignment, thus reducing the bridge's lifespan. It can also increase the bearing's service life and reduce the frequency of bearing replacement.

[0026] In one embodiment, see Figure 1 and Figure 4 As shown, a through groove 81 is provided in the middle of the pearl cotton foam template 8. The through groove 81 forms a hollow structure in the middle of the pearl cotton foam template 8. When the pearl cotton foam template 8 is under pressure, this area can deform appropriately, which enhances the tightness of the template edge; effectively fills the gap between the embedded steel plate 4 and the T-beam 6, thereby preventing the grout from leaking through the gap.

[0027] In one embodiment, see Figure 1 and Figure 5 As shown, a filling gap 100 is formed between the T-beam 6, the embedded steel plate 4, and the pearl cotton foam template 8. The filling gap 100 is located below the connection hole 61. Grout flows out from below the connection hole 61 and fills the gap. After the filling gap 100 is filled with grout, a continuous and complete interface is formed, so as to achieve uniform stress on the entire support.

[0028] In one embodiment, see Figure 1 and Figure 2 As shown, the height H of the filling gap 100 is 3-5cm. During the hoisting construction of T-beam 6, there are manufacturing and installation errors of several millimeters to centimeters on the upper and lower component surfaces. By setting a groutable gap of 3-5cm, the grout can automatically compensate for the unevenness or misalignment between the bottom of the beam and the steel plate surface during the grouting process, ensuring that the support fits and the steel plate is fully grouted and not suspended.

[0029] In one embodiment, see Figure 1 and Figure 5 As shown, the pre-embedded hole 7 includes a grouting hole 71 and a grout outlet hole 72. Several connecting holes 61 are respectively connected to the grouting hole 71 and the grout outlet hole 72. By connecting the several connecting holes 61 to the grouting hole 71 and the grout outlet hole 72, the grouting material is injected from one side, flows along the inside of the structure, and is discharged from the other side. By setting the grout outlet hole 72, the grout can squeeze out the residual air while filling the internal space, ensuring that the structure is filled. The grouting material finally fills the gap 100 between the bottom of the T-beam 6, the pre-embedded steel plate 4 and the pearl cotton foam template 8, thereby ensuring that the vertical force of the support is uniform, avoiding voids or bias pressure, and improving the long-term safety of bridge operation and the service life of the support.

[0030] In one embodiment, see Figure 1 and Figure 5 As shown, grouting holes 71 and grout outlet holes 72 are provided on both sides of the T-beam 6. Grouting holes 71 are provided on one side of the T-beam 6, and grout is injected into the gap between the bottom of the T-beam 6 and the top surface of the support steel plate 31 through grouting holes 71. Grout outlet holes 72 are provided on the opposite side of the T-beam 6, and grout flows laterally along grouting holes 71 and is discharged from grout outlet holes 72.

[0031] In one embodiment, see Figure 1 and Figure 4 As shown, a pre-drilled hole 21 is provided on the pad stone 2, and a support assembly 3 is provided in the pre-drilled hole 21. The pad stone 2 is set on the cap beam 1 and is the pressure-bearing foundation structure between the support assembly 3 and the upper component. It needs to have sufficient bearing capacity and stability. The support assembly 3 is installed in the pre-drilled hole 21 to connect the upper T-beam 6 and the pad stone 2 and transfer the structural load.

[0032] In one embodiment, see Figure 1 and Figure 2 As shown, the support assembly 3 includes a support steel plate 31, which is placed above the pad stone 2. Several anchor bolts 32 are provided at the bottom of the support steel plate 31. The support steel plate 31 passes through the pre-reserved hole 21 of the pad stone through the anchor bolts 32 and is connected to the inside of the cap beam 1 through the entire pad stone 2. The anchor bolts 32 pass through the pre-reserved hole 21 of the pad stone and are connected to the inside of the cap beam 1, thereby fixing the support steel plate 31.

[0033] In one embodiment, see Figure 1 and Figure 5 As shown, bolt pre-drilled holes 11 are provided inside the cap beam 1, and anchor bolts 32 are installed in the bolt pre-drilled holes 11. The bolt pre-drilled holes 11 are used to install anchor bolts 32. By pre-setting bolt pre-drilled holes 11 before pouring the cap beam 1, it can be ensured that the anchor bolts 32 are precisely aligned with the bolt pre-drilled holes 11 at the bottom of the cap beam 1; drilling errors are avoided and installation accuracy is improved.

[0034] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A bridge bearing top surface post-grouting device, comprising a cap beam (1), wherein a pad stone (2) is disposed on the cap beam (1), characterized in that, A support assembly (3) is provided above the pad stone (2). A pre-embedded steel plate (4) is provided on the support assembly (3). Several connecting steel bars (5) are provided on the pre-embedded steel plate (4). A T-beam (6) is connected to the several connecting steel bars (5) through several connecting holes (61). The several connecting holes (61) are connected to the pre-embedded holes (7). A pearl cotton foam template (8) is provided between the pre-embedded steel plate (4) and the T-beam (6).

2. The bridge bearing top surface post-grouting device according to claim 1, characterized in that, The pearl cotton foam template (8) has a through groove (81) in the middle.

3. The bridge bearing top surface post-grouting device according to claim 1, characterized in that, The T-beam (6), the embedded steel plate (4), and the pearl cotton foam template (8) form a filling gap (100).

4. The bridge bearing top surface post-grouting device according to claim 3, characterized in that, The height H of the filling gap (100) is 3-5cm.

5. A bridge bearing top surface post-grouting device according to claim 1, characterized in that, The pre-embedded hole (7) includes a grouting hole (71) and a grout outlet hole (72), and several connecting holes (61) are respectively connected to the grouting hole (71) and the grout outlet hole (72).

6. A bridge bearing top surface post-grouting device according to claim 5, characterized in that, The grouting hole (71) and the grout outlet hole (72) are located on both sides of the T-beam (6).

7. A bridge bearing top surface post-grouting device according to claim 1, characterized in that, The pad stone (2) is provided with a pad stone reserved hole (21), and a support assembly (3) is provided in the pad stone reserved hole (21).

8. A bridge bearing top surface post-grouting device according to claim 2, characterized in that, The support assembly (3) includes a support steel plate (31), which is positioned above the pad stone (2). The bottom of the support steel plate (31) is provided with a number of anchor bolts (32), which pass through the pad stone (2) through the pre-drilled holes (21) in the pad stone and are connected to the inside of the cap beam (1).

9. A bridge bearing top surface post-grouting device according to claim 1, characterized in that, The cover beam (1) is provided with bolt pre-drilled holes (11), and anchor bolts (32) are provided in the bolt pre-drilled holes (11).

Images