Composite damping core shock insulation rubber support adopting novel anchoring mode

Abstract

The utility model relates to the technical field of bridge shock insulation, and provides a composite damping core shock insulation rubber support adopting a novel anchoring mode. Comprising a lower connecting plate, an upper connecting plate and a seismic isolation unit. The lower connecting plate is provided with at least two groups of lower strip-shaped holes which are arranged along the transverse bridge direction, and the upper connecting plate is provided with at least two groups of upper strip-shaped holes which are arranged along the bridge direction; the lower connecting plate and the upper connecting plate are fixed between a bridge body and a bridge pier through connecting bolts and sleeve anchor pieces, anti-skid cushion blocks are arranged between the connecting bolts and the lower connecting plate and between the connecting bolts and the upper connecting plate, and the support is fixed by means of a lower strip hole formed in the lower connecting plate, an upper strip hole formed in the upper connecting plate and the connecting bolts penetrating through the strip holes. The connecting bolts can slide in the strip-shaped holes, so that the mounting difficulty of the support is reduced, and the construction efficiency is improved; after installation is completed, under the condition that the shock insulation unit generates shear deformation, secondary adjustment of the position of the support can be achieved, and the problem that after an existing support is installed and connected, secondary adjustment of the position is inconvenient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge seismic isolation, in particular to a composite damping core seismic isolation rubber bearing with a new anchoring method. Background Technique

[0002] When an earthquake comes, it usually causes the bridge beam to produce a horizontal displacement several times that of the normal working condition, and is accompanied by a large change in vertical pressure. Therefore, under earthquake conditions, the rubber bearing under the beam is more likely to roll and slip due to excessive horizontal displacement, thereby increasing the risk of the bridge beam overturning. At present, in order to reduce the damage of the earthquake to the beam, thick steel plates are usually connected to the rubber bearing as a whole, and then the thick steel plates are anchored to the beam with or anchor reinforcement. In this way, the rubber bearing can withstand a greater horizontal displacement without rolling, and when the vertical pressure decreases and is not enough to provide sufficient friction, the bearing will not slip under the support of the anchor, ensuring the safety of the bridge under earthquake.

[0003] The currently commonly used anchoring method in the industry is to set sleeve anchor parts above and below the bearing, which can be installed only when the connection holes of the beam bottom embedded parts and the pier platform embedded parts are aligned, and the setting accuracy requirements for the upper and lower hole positions are relatively high. Especially after the bridge has been used for a period of time, at this time, the rubber bearing is usually in a shear state due to bearing a certain horizontal force, and the upper and lower surfaces of the bearing have shifted under the action of the horizontal force. In this case, if the bearing needs to be replaced or adjusted, the misalignment of the upper and lower installation holes of the bearing will greatly increase the difficulty of the replacement work.

[0004] Therefore, the utility model proposes a composite damping core seismic isolation rubber bearing with a new anchoring method. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies of the prior art and provide a composite damping core seismic isolation rubber bearing with a new anchoring method.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A composite damping core seismic isolation rubber bearing with a new anchoring method includes a lower connecting plate, an upper connecting plate, and a seismic isolation unit arranged between the lower connecting plate and the upper connecting plate; at least two groups of lower strip holes arranged along the transverse direction of the bridge are provided on the lower connecting plate, and at least two groups of upper strip holes arranged along the longitudinal direction of the bridge are provided on the upper connecting plate; the lower connecting plate and the upper connecting plate are fixed between the bridge body and the pier through connecting bolts and sleeve anchor parts, and anti-slip pads are provided between the connecting bolts and the lower connecting plate and the upper connecting plate.

[0008] Preferably, the seismic isolation unit includes two sealing plates, a rubber layer, a composite damping core rod, and a protective jacket. The rubber layer is sleeved outside the composite damping core rod, the protective jacket is sleeved outside the rubber layer, the sealing plates are placed at both ends of the rubber layer, and the sealing plates are connected to the lower connecting plate and the upper connecting plate through fixing bolts.

[0009] Preferably, the periphery of the lower strip hole is provided with lower anti-slip lines, and the periphery of the upper strip hole is provided with upper anti-slip lines.

[0010] Preferably, the anti-slip cushion block is provided with a plurality of cylindrical through holes, and the side of the anti-slip cushion block in contact with the lower connecting plate and the upper connecting plate is provided with cushion block anti-slip lines.

[0011] Preferably, a limiting insert block is arranged between the connecting bolt and the lower strip hole, and a limiting insert block is arranged between the connecting bolt and the upper strip hole.

[0012] Preferably, the shape of the limiting insert block is similar to that of the lower strip hole and the upper strip hole. One connecting bolt is arranged on the left and right sides of the lower strip hole and the upper strip hole respectively. The length of the limiting insert block after splicing is the size of the lower strip hole and the upper strip hole minus the diameter of the connecting bolt; the material of the limiting insert block is hard high-strength plastic.

[0013] Preferably, the lower connecting plate and the upper connecting plate are rectangles with unequal lengths and widths, and the long side of the lower connecting plate corresponds to the short side of the upper connecting plate.

[0014] The composite damping core seismic isolation rubber bearing with a new anchoring method disclosed by the present utility model has the following beneficial effects.

[0015] Firstly, the present utility model is provided with at least two groups of lower strip holes arranged along the transverse bridge direction on the lower connecting plate, and at least two groups of upper strip holes arranged along the longitudinal bridge direction on the upper connecting plate. The connecting bolts pass through the strip holes to fix the bearing. The connecting bolts can slide in the strip holes, which can adapt to a larger installation error between the beam body and the bearing, reduce the installation difficulty of the bearing, improve the construction efficiency, and reduce the construction cost; after the installation is completed, when the seismic isolation unit has generated shear deformation, the position of the seismic isolation unit can be adjusted secondly through the strip holes, solving the problem that it is inconvenient to adjust the position secondly after the current bearing is installed and connected.

[0016] Secondly, while being convenient for installation, the present utility model does not additionally increase many accessory structures and the steel consumption, and the comprehensive cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0018] Figure 2 is a front view structural schematic diagram of the present utility model.

[0019] Figure 3This is another three-dimensional structural schematic diagram of the present utility model.

[0020] Figure 4 This is a three-dimensional sectional structural schematic diagram of the present utility model.

[0021] Figure 5 This is a structural schematic diagram of the anti-slip cushion block of the present utility model.

[0022] Figure 6 is Figure 4 The partial enlarged view at position A in

[0023] Figure 7 This is a top view structural schematic diagram of the present utility model

[0024] In the attached drawings: 1. Lower connecting plate; 11. Lower strip hole; 12. Lower anti-slip pattern; 2. Upper connecting plate; 21. Upper strip hole; 22. Upper anti-slip pattern; 3. Seismic isolation unit; 31. Sealing plate; 32. Rubber layer; 33. Composite damping core rod; 34. Protective cover; 4. Fixed bolt; 5. Connecting bolt; 6. Anti-slip cushion block; 61. Block anti-slip pattern; 62. Through hole; 7. Limit insert. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present utility model. Embodiment

[0027] The present utility model discloses a composite damping core seismic isolation rubber bearing with a new anchoring method.

[0028] Referring to Figure 1 and Figure 2 shown, a composite damping core seismic isolation rubber bearing with a new anchoring method includes a lower connecting plate 1, an upper connecting plate 2, and a seismic isolation unit 3 fixed between the lower connecting plate 1 and the upper connecting plate 2 through a fixed bolt 4; specifically, as Figure 4 and Figure 6As shown in the figure, the seismic isolation unit 3 includes upper and lower sealing plates 31, a rubber layer 32, a composite damping core rod 33, and a protective cover 34. The rubber layer 32 is sleeved outside the composite damping core rod 33, the protective cover 34 is sleeved outside the rubber layer 32, the sealing plates 31 are placed at both ends of the rubber layer 32, and the sealing plates 31 are connected to the lower connecting plate 1 and the upper connecting plate 2 through fixing bolts 4. The number of layers of the rubber layer 32 is selected according to the design requirements. The composite damping core rod 33 provides the damping energy dissipation performance of the seismic isolation unit 3. By adjusting the size and material of the core rod, the damping capacity can be adjusted. The composite damping core rod 33 can arbitrarily adjust the bearing damping ratio within the range of 5% - 22%, so as to adapt to different bridge seismic systems and meet different seismic performance requirements. At medium and low damping, it can meet the design requirements of the ductile seismic system; at high damping, it can also meet the design requirements of the seismic isolation and seismic reduction system.

[0029] As Figure 1 , Figure 3 and Figure 4 shown, at least two groups of lower strip holes 11 arranged along the transverse direction of the bridge are provided on the lower connecting plate 1, and at least two groups of upper strip holes 21 arranged along the longitudinal direction of the bridge are provided on the upper connecting plate 2, which can adapt to a larger installation error between the beam body and the bearing, reduce the installation difficulty of the bearing, improve the construction efficiency and reduce the construction cost; specifically, as Figure 7 shown, the lower connecting plate 1 and the upper connecting plate 2 are rectangles with unequal lengths and widths. The long side of the lower connecting plate 1 corresponds to the short side of the upper connecting plate 2. Two groups of lower strip holes 11 are symmetrically arranged at the shorter ends of the lower connecting plate 1, and two groups of upper strip holes 21 are symmetrically arranged at the shorter ends of the upper connecting plate 2. The number of the lower strip holes 11 and the upper strip holes 21 is set according to different bearing sizes and specifications, generally 4 - 12. The adjustment amount of a single hole is the length of the strip hole minus the bolt diameter, preferably 1 - 5 cm. By adopting the staggered arrangement of the length and width and shortening the steel plate size on the side without strip holes, the steel consumption can be saved, and thus the cost of the bearing can be reduced.

[0030] The lower connecting plate 1 and the upper connecting plate 2 are fixed between the bridge body and the bridge pier through connecting bolts 5 and sleeve anchors. Anti-slip pads 6 are provided between the connecting bolts 5 and the lower connecting plate 1 and the upper connecting plate 2 to reduce the possibility of relative sliding between the connecting bolts 5 and the lower connecting plate 1 and the upper connecting plate 2. Specifically, the connecting bolts 5 pass through the strip holes and anti-slip pads 6 provided on the connecting plates and are connected to the sleeve anchors. The sleeve anchors are inserted into the embedded holes of the bridge deck and the pier platform. As Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in the figure, in order to further reduce the possibility of relative sliding between the connecting bolt 5 and the lower connecting plate 1 and the upper connecting plate 2, lower anti-slip threads 12 are provided around the lower strip hole 11, and upper anti-slip threads 22 are provided around the upper strip hole 21. Anti-slip pads 6 are provided with pad anti-slip threads 61 on the sides in contact with the lower connecting plate 1 and the upper connecting plate 2. Columnar through holes 62 arranged in a whole row are provided on the anti-slip pads 6. The through holes 62 are used for sleeving the connecting bolt 5. The lower anti-slip threads 12, the upper anti-slip threads 22, and the pad anti-slip threads 61 can be machined by methods such as machining and knurling. Specifically, they can be processed into concave-convex patterns such as anti-slip teeth, herringbone patterns, cross patterns, strip patterns, and grid patterns, which can improve the surface roughness and effectively prevent the support from slipping during use after being pressed. As Figure 3 As shown in the figure, a limit insert 7 is provided between the connecting bolt 5 and the lower strip hole 11, and a limit insert 7 is provided between the connecting bolt 5 and the upper strip hole 21. Specifically, the shape of the limit insert 7 is similar to that of the lower strip hole 11 and the upper strip hole 21. One limit insert 7 is arranged on each of the left and right sides of the connecting bolt 5 in the lower strip hole 11 and the upper strip hole 21. The length of the limit insert 7 after splicing is the size of the strip hole minus the bolt diameter, which prevents the connecting bolt 5 from sliding in the strip hole. The material of the limit insert 7 can be made of any common steel, hard high-strength plastic or other materials. The limit insert 7 can also be formed by welding steel plates on both sides of the connecting bolt 5.

[0031] During on-site installation, place the support on the pier, align the center of the lower strip hole 11 with the embedded hole on the pier, place the anti-slip pad 6, and put on the connecting bolt 5 without tightening it. Then start lowering the beam. When the position of the beam drops and the position is adjusted in place and is about to contact the support, temporarily support the beam with a jack, adjust the displacement of the support, align the upper strip hole 21 with the embedded hole on the center beam, align the anti-slip pad 6, connect the upper connecting bolt 5 and loosen the jack to let the beam fully rest on the support, and then tighten the connecting bolt 5 to complete the installation of the support.

[0032] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The substitution can be the substitution of part of the structure, device, and method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and its inventive concept should be covered within the protection scope of the present invention.

Claims

1. A composite damping core seismic isolation rubber bearing with a new anchoring method, comprising a lower connecting plate (1), an upper connecting plate (2), and a seismic isolation unit (3) disposed between the lower connecting plate (1) and the upper connecting plate (2); characterized in that, The lower connecting plate (1) is provided with at least two groups of lower strip holes (11) arranged along the transverse direction of the bridge, and the upper connecting plate (2) is provided with at least two groups of upper strip holes (21) arranged along the longitudinal direction of the bridge; the lower connecting plate (1) and the upper connecting plate (2) are fixed between the bridge body and the pier through connecting bolts (5) and sleeve anchors, and anti-slip pads (6) are arranged between the connecting bolts (5) and the lower connecting plate (1) and the upper connecting plate (2).

2. The composite damping core isolation rubber bearing with a new type of anchoring method according to claim 1, characterized in that, The isolation unit (3) includes two sealing plates (31), a rubber layer (32), a composite damping core rod (33), and a protective coat (34). The rubber layer (32) is sleeved outside the composite damping core rod (33), the protective coat (34) is sleeved outside the rubber layer (32), the sealing plates (31) are placed at both ends of the rubber layer (32), and the sealing plates (31) are connected to the lower connecting plate (1) and the upper connecting plate (2) through fixing bolts (4).

3. The composite damping core isolation rubber bearing with a new type of anchoring method according to claim 1, characterized in that, Lower anti-slip lines (12) are provided around the lower strip holes (11), and upper anti-slip lines (22) are provided around the upper strip holes (21).

4. The composite damping core isolation rubber bearing with a new type of anchoring method according to claim 1, characterized in that, A number of cylindrical through holes (62) are provided on the anti-slip pad (6), and pad anti-slip lines (61) are provided on the side of the anti-slip pad (6) in contact with the lower connecting plate (1) and the upper connecting plate (2).

5. The composite damping core isolation rubber bearing with a new type of anchoring method according to claim 1, characterized in that, A limiting insert block (7) is arranged between the connecting bolt (5) and the lower strip hole (11), and a limiting insert block (7) is arranged between the connecting bolt (5) and the upper strip hole (21).

6. The composite damping core isolation rubber bearing with a new anchoring method according to claim 5, characterized in that, The shape of the limiting insert block (7) is similar to that of the lower strip hole (11) and the upper strip hole (21). One connecting bolt (5) is arranged on the left and right sides of the lower strip hole (11) and the upper strip hole (21). The length of the limiting insert block (7) after splicing is the size of the lower strip hole (11) and the upper strip hole (21) minus the diameter of the connecting bolt (5); the material of the limiting insert block (7) is hard high-strength plastic.

7. The composite damping core isolation rubber bearing with a new anchoring method according to claim 1, characterized in that, The lower connecting plate (1) and the upper connecting plate (2) are rectangles with unequal length and width, and the long side of the lower connecting plate (1) corresponds to the short side of the upper connecting plate (2).

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