A bridge support with measurable displacement and adjustable height and installation method thereof

Abstract

The present invention discloses a bridge bearing with measurable displacement and adjustable height, comprising an upper support plate and a lower support plate, wherein the upper support plate and the lower support plate are connected via a shock-absorbing seat, and a connecting hole for passing an anchor bolt is arranged on the lower support plate, and the bottom of the anchor bolt is pre-buried in a column, and an adjusting nut is sleeved on the anchor bolt, and the adjusting nut is located below the lower support plate; the lower support plate is connected to the column via a post-cast cushion stone, and a steel mesh with a supporting function is arranged inside the cushion stone; the anchor bolt is located outside the cushion stone; the upper support plate is connected to the beam, and a polytetrafluoroethylene plate is arranged between the upper support plate and the shock-absorbing seat, and a rubber block for recording the maximum displacement position that is compressed but not rebounded is arranged on the polytetrafluoroethylene plate. The present invention also discloses a method for installing a bridge bearing with measurable displacement and adjustable height. The present invention adopts the bridge adjustment bearing of the above structure and the installation method thereof, which can solve the problem that the existing bearing is closely fitted to the beam, the bearing is frequently stressed, and the service life is affected.

Description

Technical Field

[0001] The invention relates to the technical field of bridge connection structures, and in particular to a bridge support with measurable displacement and adjustable height and an installation method thereof. Background Art

[0002] The bridge includes horizontal beams and vertical columns. After the columns and beams are cast, they are connected through a rear connection structure, so that the reaction force and deformation on the beams can be reliably transmitted to the lower structure of the bridge, reducing the stress on the beams and improving the safety of the bridge. The connection structure between the beams and the columns is a relatively important component in the bridge. In the full-length case, the beams and columns are connected through supports, the bottom of the supports are set on the columns, and the top of the supports are set on the lower surface of the beams. When a vehicle passes above the beam, the beam and the supports frequently come into contact, causing the beam to frequently squeeze the supports, affecting the service life of the supports and posing certain safety hazards. Summary of the invention

[0003] The purpose of the present invention is to provide a bridge bearing with measurable displacement and adjustable height, so as to solve the problem that the existing bearing is closely fitted with the beam, the bearing is frequently stressed, and the service life is affected. Another purpose of the present invention is to provide an installation method for a bridge bearing with measurable displacement and adjustable height.

[0004] To achieve the above-mentioned purpose, the present invention provides a bridge bearing with measurable displacement and adjustable height, comprising an upper support plate and a lower support plate, the upper support plate and the lower support plate being connected via a shock-absorbing seat, the lower support plate being provided with a connecting hole for allowing an anchor bolt to pass through, the bottom of the anchor bolt being pre-buried in a column, an adjusting nut being sleeved on the anchor bolt, and the adjusting nut being located below the lower support plate; the lower support plate and the column being connected via a post-cast cushion stone, a steel mesh with a supporting function being provided inside the cushion stone; the anchor bolt being located outside the cushion stone; the upper support plate being connected to the beam, a polytetrafluoroethylene plate being provided between the upper support plate and the shock-absorbing seat, and a rubber block which is compressed but not rebounded and is used to record the maximum displacement position is provided on the polytetrafluoroethylene plate.

[0005] Preferably, the shock absorbing seat is a rubber shock absorbing block, and the shock absorbing seat is located at the center of the upper support plate and the lower support plate.

[0006] Preferably, the embedded depth of the anchor bolt on the column is 25-30 cm.

[0007] Preferably, the anchor bolts are located at four corners of the lower support plate, and each anchor bolt is provided with two adjusting nuts, and a spring washer is provided between the adjusting nut and the lower support plate.

[0008] Preferably, the cushion stone is cast by using C50 strength concrete grouting material; the upper support plate and the beam are fixedly connected by steel glue, and the steel glue is epoxy steel glue.

[0009] Preferably, a limiting plate is arranged around the shock absorbing seat, the limiting plate is located between the upper supporting plate and the lower supporting plate, and the bottom of the limiting plate is fixedly connected to the lower supporting plate.

[0010] Preferably, the steel mesh includes transverse U-shaped steel bars and vertical U-shaped steel bars whose bottoms are vertically arranged and fixed to columns, the bottoms of the transverse U-shaped steel bars are connected by vertical bars, and the bottoms of the vertical U-shaped steel bars are connected by transverse bars.

[0011] The installation method of the above-mentioned bridge bearing with measurable displacement and adjustable height comprises the following steps:

[0012] S1, set out the center line of the support, the upper support plate, and the center line of the beam bottom, tie the pad stone reinforcement, install the limit plate and shock absorber seat on the lower support plate, and calculate the elevation of the column, lower support plate, pad stone, and upper support plate before pouring the column;

[0013] S2, embed 4 M30 anchor bolts into the top surface of the cast-in-place concrete column, with a pre-embedding depth of 28 cm;

[0014] S3, pass the M30 anchor bolt through the 40mm thick lower support plate, set double adjustment nuts on the anchor bolts, and adjust the elevation of the lower support plate by adjusting the height of the adjustment nuts. The horizontal height difference of the four corners of the lower support plate is less than 1mm;

[0015] S4, apply a rubber block with a certain height on the PTFE plate of the upper support plate, and rotate the adjusting nut to make the rubber block contact with the surface of the shock absorber seat;

[0016] S5, a heavy-load test vehicle passes over the beam, the beam is deformed under the action of the heavy-load test vehicle, and pressure is exerted on the rubber block, the rubber block is deformed and squeezed out, the rubber block is removed from the upper support plate, and the remaining height of the rubber block is measured;

[0017] S6, rotating the adjusting nut to adjust the height of the lower support plate upwards, the height being the height of the rubber block remaining after being pressed;

[0018] S7. Pour C50 strength grouting material support pad stone, and the upper surface of the pad stone should be flush with the upper surface of the lower support plate.

[0019] The present invention discloses a bridge support with measurable displacement and adjustable height and its installation method. The upper support plate and the lower support plate are connected by a shock-absorbing seat, which can effectively transmit the displacement and rotation angle on the beam downward to improve the safety of the beam. The lower support plate is connected to the column by an anchor bolt, and the adjusting nut sleeved on the anchor bolt is located below the lower support plate. The height of the lower support plate can be adjusted by rotating the adjusting nut.

[0020] A rubber block is set between the upper support plate and the shock absorber seat. The heavy test vehicle generates pressure on the rubber block on the beam, and the rubber block is deformed. By measuring the remaining height of the rubber block, the lower support plate is adjusted to the compressed rubber block through the adjusting nut. Under normal circumstances, the upper support plate and the shock absorber seat are not close, and the upper support plate does not need to frequently bear the reaction force of the shock absorber seat, which is beneficial to improve the life of the support and reduce the fatigue of the beam plate. When the beam is under heavy load, the upper support contacts the shock absorber seat, and the upper support plate bears the reaction force of the shock absorber seat, thereby supporting the beam and improving the safety of the beam.

[0021] The bridge support with measurable displacement and adjustable height described in the present invention is particularly suitable for installation on a support on a newly added column for safe lifting of an independent pier bridge, and has an auxiliary support function for the beam body. When the beam body bears a large load, the beam is supported to improve the safety of the beam. The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a bridge bearing with measurable displacement and adjustable height and an installation method thereof of the present invention;

[0023] Figure 2 A schematic diagram of a limit plate installation structure of an embodiment of a bridge bearing with measurable displacement and adjustable height and an installation method thereof according to the present invention;

[0024] Figure 3 The present invention is a schematic diagram of a steel mesh structure of an embodiment of a bridge bearing with measurable displacement and adjustable height and an installation method thereof.

[0025] Reference numerals

[0026] 1. Column; 2. Beam; 3. Upper support plate; 4. Lower support plate; 5. Shock absorber; 6. Limit plate; 7. Rubber block; 8. Connection hole 9. Pad stone; 10. Steel mesh; 11. Anchor bolt; 12. Adjusting nut; 13. Horizontal U-shaped steel bar; 14. Vertical U-shaped steel bar; 15. Horizontal reinforcement; 16. Vertical reinforcement. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Example

[0030] Figure 1 This is a structural schematic diagram of an embodiment of a bridge bearing with measurable displacement and adjustable height and an installation method thereof according to the present invention. Figure 2 The present invention is a schematic diagram of a limit plate installation structure of a bridge support with measurable displacement and adjustable height and an installation method thereof. As shown in the figure, a bridge support with measurable displacement and adjustable height includes an upper support plate 3 and a lower support plate 4, both of which are made of rigid steel plates. The upper support plate 3 and the lower support plate 4 are connected by a shock-absorbing seat 5, which is a rubber shock-absorbing block, and the shock-absorbing seat 5 is located at the center of the upper support plate 3 and the lower support plate 4. The shock-absorbing seat 5 can undergo a certain deformation to meet the effective transmission of the displacement and rotation angle of the beam 2. The limit plate 6 is arranged around the shock-absorbing seat 5, and the limit plate 6 is located between the upper support plate 3 and the lower support plate 4, and the bottom of the limit plate 6 is fixedly connected to the lower support plate 4. The limit plate 6 is an angle steel, and the side of the limit plate 6 is in contact with the shock-absorbing seat 5, and the limit plate 6 has a certain protective effect on the shock-absorbing seat 5.

[0031] The lower support plate 4 is provided with a connection hole 8 for the anchor bolt 11 to pass through. The anchor bolt 11 is located at the four corners of the lower support plate 4 to improve the support strength of the anchor bolt 11 to the lower support plate 4. The bottom of the anchor bolt 11 is embedded in the column 1, and the embedded depth of the anchor bolt 11 on the column 1 is 25-30cm, preferably 28cm. The anchor bolt 11 is sleeved with an adjusting nut 12, and the adjusting nut 12 is located below the lower support plate 4. Two adjusting nuts 12 are provided on each anchor bolt 11, and a spring gasket is provided between the adjusting nut 12 and the lower support plate 4 to improve the support strength of the anchor bolt 11 to the lower support plate 4. The adjusting nut 12 is screwed with a wrench to adjust the position of the adjusting nut 12 on the anchor bolt 11, thereby adjusting the height and levelness of the lower support plate 4 to facilitate the installation of the support. The adjusting nut 12 can also adjust the height of the upper support plate 3 to adjust the upper support plate 3 to the designed height.

[0032] The lower support plate 4 is connected to the column 1 by a post-cast cushion stone 9, which is cast with C50 strength concrete grouting material. The cushion stone 9 supports the lower support plate 4 and improves the connection strength between the lower support plate 4 and the column 1. The upper surface of the cushion stone 9 is flush with the upper surface of the lower support plate 4. The cushion stone 9 is a cross-shaped structure, and the anchor bolt 11 is located outside the cushion stone 9.

[0033] The upper support plate 3 and the beam 2 are fixedly connected by steel glue, and a polytetrafluoroethylene plate is arranged between the upper support plate 3 and the shock-absorbing seat 5, and the polytetrafluoroethylene plate is fixedly arranged on the lower surface of the upper support plate 3. A rubber block 7 for recording the maximum displacement position is arranged on the lower surface of the polytetrafluoroethylene plate, which is compressed but not rebounded. The rubber block 7 is used to detect the maximum displacement of the beam 2, so as to determine the adjustment height of the lower support plate 4.

[0034] Figure 3 The present invention is a schematic diagram of a steel mesh structure of an embodiment of a bridge bearing with measurable displacement and adjustable height and its installation method. As shown in the figure, a steel mesh 10 with a supporting function is arranged inside the cushion stone 9. The steel mesh 10 includes a transverse U-shaped steel bar 13 and a vertical U-shaped steel bar 14 whose bottom is vertically arranged and fixed to the column 1, and the U-shaped steel bar has a good supporting effect. The transverse U-shaped steel bar 13 and the vertical U-shaped steel bar 14 are tied together by wire. The bottoms of the transverse U-shaped steel bars 13 are connected by vertical bars 16, and the bottoms of the vertical U-shaped steel bars 14 are connected by transverse bars 15. The transverse bars 15 and the vertical bars 16 are respectively arranged in upper and lower layers on the vertical U-shaped steel bars 14 and the transverse U-shaped steel bars 13, so as to improve the supporting strength of the steel mesh 10, thereby improving the supporting strength of the cushion stone 9 to the lower support plate 4.

[0035] The above-mentioned method for installing the bridge adjusting bearing comprises the following steps:

[0036] S1, lay out the center line of the support, the upper support plate 3, and the bottom center line of the beam 2, tie the steel bars of the cushion stone 9, install the limit plate 6 and the shock-absorbing seat 5 on the lower support plate 4, and calculate the elevation of the column 1, the lower support plate 4, the cushion stone 9, and the upper support plate 3 before pouring the column 1.

[0037] S2, embed four M30 anchor bolts 11 into the top surface of the cast-in-place concrete column 1, with the embedding depth being 28 cm.

[0038] S3, pass the M30 anchor bolt 11 through the 40mm thick lower support plate 4, set a double adjusting nut 12 on the anchor bolt 11, and adjust the elevation of the lower support plate 4 by adjusting the height of the adjusting nut 12. The horizontal height difference of the four corners of the lower support plate 4 is less than 1mm.

[0039] S4, applying a rubber block 7 with a certain height on the PTFE plate of the upper support plate 3, and rotating the adjusting nut to make the rubber block contact with the surface of the shock absorbing seat 5.

[0040] S5, a heavy-load test vehicle passes over the beam 2, and the beam 2 is deformed under the action of the heavy-load test vehicle, which generates pressure on the rubber block 7, causing the rubber block 7 to deform and extrude. The rubber block 7 is removed from the upper support plate 3, and the remaining height of the rubber block 7 is measured.

[0041] S6, rotate the adjustment nut 12 to adjust the height of the lower support plate 4 upward, and the height is adjusted to the height of the rubber block 7 remaining after being pressed. Under normal circumstances, the upper support plate 3 does not contact the shock-absorbing seat 5, and the shock-absorbing seat 5 does not need to frequently bear the pressure of the beam 2, which is beneficial to improving the life of the support. When the beam 2 bears a heavy load, the upper support plate 3 contacts the shock-absorbing seat 5 to support the beam 2 and improve the safety of the beam 2.

[0042] S7, pouring C50 strength grouting material support pad stone 9, the upper surface of the pad stone 9 is flush with the upper surface of the lower support plate 4.

[0043] Therefore, the present invention adopts the bridge adjustment bearing of the above structure and the installation method thereof, which can solve the problem that the existing bearing is closely fitted with the beam, the bearing is frequently subjected to force, and the service life is affected.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A bridge bearing with measurable displacement and adjustable height, characterized in that: It includes an upper support plate and a lower support plate, the upper support plate and the lower support plate are connected by a shock-absorbing seat, the lower support plate is provided with a connecting hole for the anchor bolt to pass through, the bottom of the anchor bolt is pre-buried in the column, the anchor bolt is sleeved with an adjusting nut, and the adjusting nut is located below the lower support plate; the lower support plate and the column are connected by a post-cast cushion stone, and a steel mesh with a supporting function is arranged inside the cushion stone; the anchor bolt is located outside the cushion stone; the upper support plate is connected to the beam, a polytetrafluoroethylene plate is arranged between the upper support plate and the shock-absorbing seat, and a rubber block that is compressed but not rebounded and is used to record the maximum displacement position is arranged on the polytetrafluoroethylene plate.

2. The bridge support with measurable displacement and adjustable height according to claim 1, characterized in that: The shock absorbing seat is a rubber shock absorbing block, and the shock absorbing seat is located at the center of the upper supporting plate and the lower supporting plate.

3. The bridge support with measurable displacement and adjustable height according to claim 1, characterized in that: The embedded depth of the anchor bolt on the column is 25-30cm.

4. The bridge support with measurable displacement and adjustable height according to claim 1, characterized in that: The anchor bolts are located at the four corners of the lower support plate, and each anchor bolt is provided with two adjusting nuts, and a spring washer is provided between the adjusting nut and the lower support plate.

5. The bridge support with measurable displacement and adjustable height according to claim 1, characterized in that: The cushion stone is cast by using C50 strength concrete grouting material; the upper support plate and the beam are fixedly connected by steel glue, and the steel glue is epoxy steel glue.

6. The bridge support with measurable displacement and adjustable height according to claim 1, characterized in that: A limiting plate is arranged around the shock-absorbing seat, the limiting plate is located between the upper supporting plate and the lower supporting plate, and the bottom of the limiting plate is fixedly connected to the lower supporting plate.

7. The bridge support with measurable displacement and adjustable height according to claim 1, characterized in that: The steel mesh includes transverse U-shaped steel bars and vertical U-shaped steel bars whose bottoms are vertically arranged and fixed to columns. The bottoms of the transverse U-shaped steel bars are connected by vertical bars, and the bottoms of the vertical U-shaped steel bars are connected by transverse bars.

8. The method for installing a bridge bearing with measurable displacement and adjustable height according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, set out the center line of the support, the upper support plate, and the center line of the beam bottom, tie the pad stone reinforcement, install the limit plate and shock absorber seat on the lower support plate, and calculate the elevation of the column, lower support plate, pad stone, and upper support plate before pouring the column; S2, embed 4 M30 anchor bolts into the top surface of the cast-in-place concrete column, with a pre-embedding depth of 28 cm; S3, pass the M30 anchor bolt through the 40mm thick lower support plate, set double adjustment nuts on the anchor bolts, and adjust the elevation of the lower support plate by adjusting the height of the adjustment nuts. The horizontal height difference of the four corners of the lower support plate is less than 1mm; S4, apply a rubber block with a certain height on the PTFE plate of the upper support plate, and rotate the adjusting nut to make the rubber block contact with the surface of the shock absorber seat; S5, a heavy-load test vehicle passes over the beam, the beam is deformed under the action of the heavy-load test vehicle, and pressure is exerted on the rubber block, the rubber block is deformed and squeezed out, the rubber block is removed from the upper support plate, and the remaining height of the rubber block is measured; S6, rotating the adjusting nut to adjust the height of the lower support plate upwards, the height being the height of the rubber block remaining after being pressed; S7. Pour C50 strength grouting material support pad stone, and the upper surface of the pad stone should be flush with the upper surface of the lower support plate.

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