Bridge shock insulation stop block structure and construction method

Abstract

The invention provides a bridge shock insulation stop block structure and a construction method, and belongs to the field of bridge engineering. The bridge shock insulation stop block structure comprises a bearing part, a stop block body, longitudinal connecting steel bars and a deformation guide block, a bearing face is arranged above the bearing part, an anti-sticking shock insulation layer is laid on the bearing face, the stop block body is arranged on the bearing face and the anti-sticking shock insulation layer in a pouring mode, a main beam contact face is arranged on one side of the stop block body, and the deformation guide block is arranged on the other side of the stop block body. The longitudinal connecting steel bar penetrates through the stop block body, the anti-sticking shock insulation layer and the bearing part, the deformation guide block is arranged in the stop block body, an abutting face is arranged on the side, away from the bearing face, of the deformation guide block, the abutting face abuts against the longitudinal connecting steel bar, a guide groove is formed in the abutting face, and the guide groove communicates with the bottom of the deformation guide block; the groove wall, close to the top of the deformation guide block, of the guide groove and the bearing face form an acute angle. The technical problems that in the prior art, a conventional bridge shock insulation stop block structure is poor in anti-seismic effect and difficult to repair after an earthquake due to structural defects can be solved.

Description

Technical Field

[0001] The present invention relates to the field of bridge engineering, and in particular to a bridge seismic isolation block structure and a construction method. Background Art

[0002] In highway bridge design, prefabricated simply supported prestressed concrete box girders are widely used across the engineering field due to their excellent integrity, strong spanning capacity, and ease of assembly and construction. As the connecting member between the main girder and the piers, the structural design and construction quality of the cap girder are often key control points in the project.

[0003] A cap beam is a reinforced concrete or lightly reinforced concrete beam placed on a bridge pier (abutment) or on a row of piles. Its primary function is to support the main beam and other superstructures. In related technologies, for medium- and small-span highways and urban viaducts, to ensure the seismic safety of plate rubber bearings and prevent the main beam from falling laterally, blocks are often installed on both sides of the cap beam or the abutment cap at the abutment to protect the supported bridge superstructure.

[0004] The block structure in the related technology is usually formed and constructed in an integral cast form on both sides of the cap beam or platform cap. When a natural disaster such as an earthquake occurs, the main beam will slide horizontally under the action of the earthquake, causing a violent collision between the main beam and the block, resulting in brittle shear failure at the connection between the block and the underlying cap beam and platform cap, causing the entire block structure to break and fail, resulting in poor seismic resistance and difficulty in post-earthquake repair. Summary of the Invention

[0005] The embodiments of the present invention provide a bridge seismic isolation block structure and construction method, which can solve the technical problems of conventional bridge seismic isolation block structures in the prior art, such as poor seismic resistance and difficulty in post-earthquake repair due to structural defects. The technical solution is as follows: In a first aspect, an embodiment of the present invention provides a bridge seismic isolation block structure, comprising: a bearing portion, a block body, longitudinal connecting steel bars, and a deformable guide block. A bearing surface is provided above the bearing part, an anti-sticking and seismic isolation layer is laid on the bearing surface, the block body is cast and provided on the bearing surface and the anti-sticking and seismic isolation layer, a main beam contact surface is provided on one side of the block body, the longitudinal connecting steel bars are passed through the block body, the anti-sticking and seismic isolation layer and the bearing part, the deformation guide block is provided in the block body and an abutting surface is provided on the side away from the bearing surface, the abutting surface abuts against the longitudinal connecting steel bars, a guide groove is provided on the abutting surface, the guide groove is connected to the bottom of the deformation guide block, and the groove wall of the guide groove near the top of the deformation guide block is arranged at an acute angle to the bearing surface.

[0006] Optionally, a notch matching the longitudinal connecting steel bar is provided along the longitudinal direction of the abutting surface, one end of the notch is connected to the guide groove, and the other end is connected to the top of the deformable guide block.

[0007] Optionally, a transverse extension section extending in a horizontal direction and embedded in the block body is provided on the top of the longitudinal connecting steel bar.

[0008] Optionally, in a first direction parallel to the bearing surface and close to or away from the main beam contact surface, a plurality of longitudinal connecting steel bars are provided, and the tops are connected by the transverse extension section, and the deformation guide blocks are abutted against the sides of the plurality of longitudinal steel bars to jointly form a strain group.

[0009] Optionally, a plurality of strain groups are evenly spaced in a second direction parallel to the bearing surface and perpendicular to the first direction.

[0010] Optionally, horizontal structural steel bars are further included, which are embedded in the block body and arranged along the second direction, and the longitudinal connecting steel bars in the plurality of strain groups are connected via the horizontal structural steel bars.

[0011] Optionally, the anti-sticking and shock-isolating layer is located in the middle of the bottom surface of the stopper block body, and the coverage range of the anti-sticking and shock-isolating layer on the bottom surface of the stopper block body is 70-90%.

[0012] Optionally, a horizontal steel bar is embedded in the bearing portion, the horizontal steel bar is connected to the longitudinal connecting steel bar, and a tensioning bar is provided on one side of the horizontal steel bar.

[0013] Optionally, a buffer pad is laid on the contact surface of the main beam.

[0014] In a second aspect, an embodiment of the present invention further provides a construction method for constructing the bridge seismic isolation block structure as described in the first aspect, comprising: Casting the bearing portion and pre-embedding the lower section of the longitudinal connecting steel bar in the bearing portion; Performing surface finishing treatment on the bearing portion to form the bearing surface, and laying the anti-sticking and seismic isolation layer at the protruding position of the longitudinal connecting steel bars; Installing the deformable guide block on the anti-sticking and shock-isolating layer, and making the abutting surface of the deformable guide block abut against the longitudinal connecting steel bars; Continue to cast the stop block body above the anti-sticking and shock-isolating layer and the bearing surface.

[0015] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least: When an earthquake strikes, the bridge's main beam will slide laterally due to the vibration, and will have a lateral impact on the block. When the lateral impact force on the block reaches its upper limit, the block will slide horizontally along the anti-sticking and seismic isolation layer. The lateral impact force is mainly borne and buffered by the longitudinal connecting steel bars passing through the block and the bearing part, as well as the friction between the contact surface of the block and the anti-sticking and seismic isolation layer during the sliding process. By setting a deformable guide block, when the block slips, the upper section of the longitudinal connecting steel bar passing through it will be free to deform toward the inside of the guide groove after being subjected to the lateral impact force, thereby avoiding direct fracture. The tensile strain is used to ensure that the block slides relative to each other in time to release the stress, and shear cracks will not be directly generated to cause damage to the overall structure. Its internal longitudinal connecting steel bars can also adapt to repeated bending. After the earthquake, the block body can be positioned to its original installation position by a jack and simply repaired so that it can continue to be used. This effectively solves the technical problems in the existing technology of poor seismic resistance and difficult post-earthquake repair of conventional bridge seismic isolation block structures due to structural defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a structural schematic diagram of a bridge seismic isolation block structure provided by an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a bridge seismic isolation block structure with a strain group provided by an embodiment of the present invention; Figure 3 yes Figure 2 Top view cross-section at AA in the middle; Figure 4 yes Figure 2 Schematic diagram of the structure of the bridge after the seismic isolation block structure slips; Figure 5 This is a schematic structural diagram of another bridge seismic isolation block structure with a strain group provided by an embodiment of the present invention; Figure 6 1 is a schematic diagram of the three-dimensional structure of a deformable guide block provided in an embodiment of the present invention; Figure 7 It is a flow chart of a construction method provided by an embodiment of the present invention.

[0018] In the figure: 1-bearing part; 1a-bearing surface; 2-block body; 3-longitudinal connecting steel bar; 4-deformation guide block; 5-anti-sticking isolation layer; 6-horizontal steel bar; 7-buffer pad; 8-horizontal structural steel bar; 21-main beam contact surface; 31-transverse extension section; 41-abutment surface; 61-tension bar; 411-guide groove; 412-notch; m-strain group. DETAILED DESCRIPTION To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural schematic diagram of a bridge seismic isolation block structure provided by an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a bridge seismic isolation block structure with a strain group provided by an embodiment of the present invention; Figure 3 yes Figure 2 Top view cross-section at AA in the middle; Figure 4 yes Figure 2 Schematic diagram of the structure of the bridge after the seismic isolation block structure slips; Figure 5 This is a schematic structural diagram of another bridge seismic isolation block structure with a strain group provided by an embodiment of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the deformable guide block provided by the embodiment of the present invention. Figures 1 to 6 As shown, an embodiment of the present invention provides a bridge seismic isolation block structure, including a bearing portion 1, a block body 2, longitudinal connecting steel bars 3 and a deformation guide block 4.

[0020] A bearing surface 1a is provided above the bearing portion 1, an anti-sticking and seismic isolation layer 5 is laid on the bearing surface 1a, and the block body 2 is cast and provided on the bearing surface 1a and the anti-sticking and seismic isolation layer 5. A main beam contact surface 21 is provided on one side of the block body 2, and the longitudinal connecting steel bars 3 are passed through the block body 2, the anti-sticking and seismic isolation layer 5 and the bearing portion 1. The deformation guide block 4 is provided in the block body 2 and an abutting surface 41 is provided on the side away from the bearing surface 1a, and the abutting surface 41 abuts against the longitudinal connecting steel bars 3. A guide groove 41 is provided on the abutting surface 41, and the guide groove 411 is connected to the bottom of the deformation guide block 4, and the groove wall of the guide groove 411 near the top of the deformation guide block 4 is arranged at an acute angle to the bearing surface 1a.

[0021] In an embodiment of the present invention, compared with the traditional integrally cast block structure, the bridge seismic isolation block structure proposed in this scheme optimizes the composition and construction method of the block body and the structure below the block. During construction, the bearing part 1 is cast first. In an embodiment of the present invention, the bearing part can be a cap beam for supporting the main beam or a bridge abutment. While casting, the longitudinal connecting steel bars 3 are pre-embedded at the setting position of the block body 2, so that the vertically arranged part of the longitudinal connecting steel bars 3 is pre-embedded in the bearing part 1. Thereafter, the bearing part 1 is surface-finished to form a bearing surface 1a, and an anti-sticking seismic isolation layer 5 is laid at the protruding position of the longitudinal connecting steel bars 3. The anti-sticking seismic isolation layer 5 is prepared by brushing oil and applying a lubricant (such as polytetrafluoroethylene), or applying anti-sticking materials such as building paper, anti-sticking agent or foam to form a smooth construction joint. Furthermore, after the deformable guide block 4 is installed on the anti-sticking and seismic isolation layer 5 and the abutting surface 41 of the deformable guide block 4 is abutted against the longitudinal connecting steel bar 3, the block body 2 is continued to be cast above the anti-sticking and seismic isolation layer 5 and the bearing surface 1a to complete the construction of the seismic isolation block structure of the bridge. In an embodiment of the present invention, an inclined abutting surface 41 is provided on one side of the block body 2, which is arranged at an angle to the bearing surface 1a to adapt to the box-type main beam with inclined sides. A buffer pad 7 can also be laid on the main beam contact surface 21 to achieve the purpose of buffering and shock absorption under normal working conditions and under the action of stress. After the final assembly is completed, the block bodies 2 located on both sides of the bearing part 1 use their abutting surfaces 41 to cooperate with the main beam and provide lateral constraints. When an earthquake strikes, the main beam is affected by the vibration and slides laterally, and produces a lateral impact on the block body 2. When the lateral impact force on the block body 2 reaches its upper limit, the block body 2 will slide horizontally along the anti-sticking and shock-isolating layer 5. The lateral impact force is mainly borne and buffered by the longitudinal connecting steel bars 3 passing through the block body 2 and the bearing part 1, as well as the friction between the contact surface of the block body 2 and the anti-sticking and shock-isolating layer 5 during the sliding process. By setting the deformable guide block 4, since the opening of the guide groove 411 on its abutting surface 41 abuts against the longitudinal connecting steel bars 3 during casting to achieve blocking, the block body 2 is a hollow structure in the guide groove 411 connected to the bottom after casting. When the block body 2 slides, the upper section of the longitudinal connecting steel bars 3 passing through it will be free-deformed toward the inside of the guide groove 411 after being subjected to the lateral impact force, thereby avoiding direct fracture. The tensile strain is used to ensure that the block body 2 can slide relative to each other in time to release the stress, and shear cracks will not be directly generated to cause damage to the overall structure. Its internal longitudinal connecting steel bars 3 can also adapt to repeated bending. After the earthquake, the block body 2 can be positioned to its original installation position by a jack and simply repaired and can continue to be used, effectively solving the technical problems of poor seismic resistance and difficult post-earthquake repair caused by structural defects of conventional bridge seismic isolation block structures in the existing technology.

[0022] Optionally, a notch 412 is provided longitudinally on the abutting surface 41 to match the longitudinal connecting steel bar 3. One end of the notch 412 is connected to the guide groove 411, and the other end is connected to the top of the deformable guide block 4. For example, in an embodiment of the present invention, through prefabrication, an embedded notch 412 structure is provided on the abutting surface 41 of the deformable guide block 4 for matching with the longitudinal connecting steel bar 3. When installing the deformable guide block 4, the notch 412 can be used to quickly and accurately position and install the extended section of the longitudinal connecting steel bar 3. The longitudinal connecting steel bar 3 can be entirely embedded in the notch 412. This has a simple structure and is easy to install, which can improve construction efficiency and accuracy.

[0023] Optionally, the top of the longitudinal connecting steel bar 3 is provided with a transverse extension section 31 extending in the horizontal direction and embedded in the block body 2. For example, by adding the transverse extension section 31, the extension length and contact area of the longitudinal connecting steel bar 3 in the block body 2 are increased, and the mechanical strength and overall stability of the block body 2 are improved. Furthermore, in the first direction parallel to the bearing surface 1a and close to or away from the main beam contact surface 21, a plurality of longitudinal connecting steel bars 3 are provided, and the tops are connected by the transverse extension section 31. The sides of the plurality of longitudinal steel bars are all abutted with deformation guide blocks 4 to jointly form a strain group m. In the same strain group m of the embodiment of the present invention, two vertically arranged longitudinal connecting steel bars 3 are included, and the tops of the two longitudinal connecting steel bars 3 are connected by the transverse extension section 31 to form an inverted "U"-shaped structure. The structure can be manufactured by bending a steel bar twice, and the structure is simple and easy to manufacture. In the first direction, that is, there are at least two groups of vertically arranged longitudinal connecting steel bars 3 sections and matching deformation guide blocks 4 structures, which cooperate with the anti-sticking seismic isolation layer 5 to achieve seismic isolation and earthquake resistance, improve strain capacity, and ensure earthquake resistance effect.

[0024] For example, in other possible implementation methods, according to the thickness of the block body 2 in the first direction, more longitudinal connecting steel bars 3 and the matching structures of the deformation guide blocks 4 can be set to further improve the seismic effect. The present invention does not limit the specific number.

[0025] Optionally, multiple strain groups m are evenly spaced in a second direction parallel to the bearing surface 1a and perpendicular to the first direction. For example, in an embodiment of the present invention, multiple strain groups m are spaced within the block body 2 based on the thickness of the block body 2 in the second direction, i.e., the direction in which the bridge main beam extends, to collectively buffer and withstand lateral impact forces in the second direction, thereby preventing localized excessive stress from causing shear cracks and further improving seismic isolation and resistance.

[0026] Optionally, horizontal structural steel bars 8 are further included. The horizontal structural steel bars 8 are embedded in the block body 2 and arranged along the second direction. The longitudinal connecting steel bars 3 in the multiple strain groups m are connected by the horizontal structural steel bars 8. Furthermore, on the basis of providing multiple strain groups m, the longitudinal connecting steel bars 3 arranged along the second direction in the multiple strain groups m are connected into one by adding horizontal structural steel bars 8. This allows the deformation of the multiple longitudinal connecting steel bars 3 to be kept as synchronized as possible after being subjected to force, dispersing the force to prevent local stress concentration and crushing of nearby concrete, and further avoid the generation of shear diagonal cracks.

[0027] Optionally, the anti-sticking and shock-isolating layer 5 is located in the middle of the bottom surface of the block body 2, and the coverage of the anti-sticking and shock-isolating layer 5 on the bottom surface of the block body 2 is 70-90%. For example, in an embodiment of the present invention, the anti-sticking and shock-isolating layer 5 is used as a construction joint structure arranged between the block body 2 and the bearing part 1. If 100% complete coverage is adopted, the bonding force between the block body 2 and the bearing part 1 will be too low, and it will be easy to deform or fall off, resulting in too low overall mechanical strength. If its coverage is too low, for example, it only covers 60%, and the cement pouring area is too large and the bonding force is too high, it will be difficult for the block body 2 to produce sliding deformation in time when it is subjected to the lateral impact force of the main beam in the event of an earthquake accident, resulting in the generation of shear cracks and large-scale damage. Therefore, after a large number of experiments, it was concluded that the anti-sticking and shock-isolating layer 5 is set in the middle of the bottom surface of the block body 2, and the coverage range is between 70-90% to form a construction joint, and the four sides are connected by pouring. While ensuring the mechanical strength under normal conditions, it can ensure the vibration isolation and anti-seismic effect after being subjected to force.

[0028] Optionally, a horizontal steel bar 6 is embedded in the bearing portion 1, the horizontal steel bar 6 is connected to the longitudinal connecting steel bar 3, and a tension bar 61 is provided on one side of the horizontal steel bar 6. For example, in an embodiment of the present invention, on the basis of connecting the bearing portion 1 with the lower half of the longitudinal connecting steel bar 3, by further providing transverse horizontal steel bars 6 and tension bars 61 in the bearing portion 1 and welding them to the longitudinal connecting steel bar 3, they can withstand the transverse impact force together, and can evenly diffuse the stress into the bearing portion 1, thereby avoiding excessive local stress that causes fracture in the bent section above the longitudinal connecting steel bar 3, and further improving the seismic isolation and anti-seismic effects.

[0029] Figure 7 This is a flow chart of a construction method provided by an embodiment of the present invention. Figure 7 As shown, the embodiment of the present invention also provides a construction method for constructing Figures 1 to 6 The bridge seismic isolation block structure shown in FIG. 1 includes the following steps: S1, casting the bearing part 1, and at the same time pre-embedding the lower section of the longitudinal connecting steel bar 3 in the bearing part 1; S2. Finish the surface of the bearing portion 1 to form a bearing surface 1a, and lay an anti-sticking and seismic isolation layer 5 at the extended position of the longitudinal connecting steel bars 3; S3, installing the deformable guide block 4 on the anti-sticking and seismic isolation layer 5, and making the abutting surface 41 of the deformable guide block 4 abut against the longitudinal connecting steel bar 3; S4. Continue pouring the blocking block 2 above the anti-sticking and shock-isolating layer 5 and the bearing surface 1a.

[0030] The bridge seismic isolation block structure constructed using the above-mentioned construction method, when an earthquake strikes, the main beam is affected by the vibration and produces lateral sliding, and produces a lateral impact on the block body 2. When the lateral impact force on the block body 2 reaches its upper limit, the block body 2 will slide horizontally along the anti-sticking isolation layer 5 as a whole. The lateral impact force is mainly borne and buffered by the longitudinal connecting steel bars 3 passing through the block body 2 and the bearing part 1, as well as the friction between the contact surface of the block body 2 and the anti-sticking isolation layer 5 during the sliding process. By setting the deformable guide block 4, since the opening of the guide groove 411 on its abutting surface 41 abuts against the longitudinal connecting steel bars 3 during casting to achieve blocking, the block body 2 is a hollow structure as a whole in the guide groove 411 connected to the bottom after casting. When the block body 2 slips, the upper section of the longitudinal connecting steel bar 3 passing through it will be free-deformed toward the inside of the guide groove 411 after being subjected to a lateral impact force, thereby avoiding direct fracture. The tensile strain is used to ensure that the block body 2 can slip relative to each other in time to release the stress, and no shear cracks will be directly generated to cause damage to the overall structure. The longitudinal connecting steel bar 3 inside it can also adapt to repeated bending. After the earthquake, the block body 2 can be positioned to its original installation position by a jack and simply repaired so that it can continue to be used. This effectively solves the technical problems of poor seismic resistance and difficult post-earthquake repair of conventional bridge seismic isolation block structures in the prior art due to structural defects. Its overall structure is simple, easy to construct, low in production cost, easy to repair, can effectively prevent lateral beam falling, and will not cause damage to the lower cap beam, abutment and pier column when hit by the main beam. It has broad market application prospects.

[0031] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the art to which the invention belongs. The terms "first", "second" and similar words used in the patent specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects appearing before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left", and "right" 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.

[0032] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bridge seismic isolation block structure, characterized in that: include: The bearing portion (1), the block body (2), the longitudinal connecting steel bars (3) and the deformation guide block (4) are A bearing surface (1a) is provided above the bearing portion (1), an anti-sticking and seismic isolation layer (5) is laid on the bearing surface (1a), the block body (2) is cast and provided on the bearing surface (1a) and the anti-sticking and seismic isolation layer (5), a main beam contact surface (21) is provided on one side of the block body (2), the longitudinal connecting steel bar (3) is passed through the block body (2), the anti-sticking and seismic isolation layer (5) and the bearing portion (1), the deformation guide block ( 4) An abutting surface (41) is provided in the block body (2) and on a side away from the bearing surface (1a), the abutting surface (41) abuts against the longitudinal connecting steel bar (3), a guide groove (411) is provided on the abutting surface (41), the guide groove (411) is connected to the bottom of the deformable guide block (4), and the groove wall of the guide groove (411) close to the top of the deformable guide block (4) is arranged at an acute angle to the bearing surface (1a).

2. The bridge seismic isolation block structure according to claim 1, characterized in that: A notch (412) matching the longitudinal connecting steel bar (3) is provided on the abutting surface (41) along the longitudinal direction, one end of the notch (412) being in communication with the guide groove (411), and the other end being in communication with the top of the deformable guide block (4).

3. The bridge seismic isolation block structure according to claim 1, characterized in that: The top of the longitudinal connecting steel bar (3) is provided with a transverse extension section (31) extending in the horizontal direction and embedded in the stop block body (2).

4. The bridge seismic isolation block structure according to claim 3, characterized in that: In a first direction parallel to the bearing surface (1a) and close to or away from the main beam contact surface (21), a plurality of longitudinal connecting steel bars (3) are provided, and the tops are connected by the transverse extension section (31), and the deformation guide blocks (4) are provided beside the plurality of longitudinal steel bars to jointly form a strain group (m).

5. The bridge seismic isolation block structure according to claim 4, characterized in that: In a second direction parallel to the bearing surface (1a) and perpendicular to the first direction, a plurality of strain groups (m) are evenly spaced.

6. The bridge seismic isolation block structure according to claim 5, characterized in that: It also includes horizontal structural steel bars (8), which are embedded in the block body (2) and arranged along the second direction, and the longitudinal connecting steel bars (3) in the plurality of strain groups (m) are connected via the horizontal structural steel bars (8).

7. A bridge seismic isolation block structure according to any one of claims 1 to 5, characterized in that: The anti-sticking and shock-isolating layer (5) is located in the middle of the bottom surface of the block body (2), and the coverage of the anti-sticking and shock-isolating layer (5) on the bottom surface of the block body (2) is 70-90%.

8. A bridge seismic isolation block structure according to any one of claims 1 to 5, characterized in that: A horizontal steel bar (6) is embedded in the bearing portion (1), the horizontal steel bar (6) is connected to the longitudinal connecting steel bar (3), and a tension bar (61) is provided on one side of the horizontal steel bar (6).

9. A bridge seismic isolation block structure according to any one of claims 1 to 5, characterized in that: A buffer pad (7) is laid on the main beam contact surface (21).

10. A construction method for constructing the bridge seismic isolation block structure according to any one of claims 1 to 9, characterized in that: include: Casting the bearing portion (1), while pre-embedding the lower section of the longitudinal connecting steel bar (3) in the bearing portion (1); Performing a surface finishing treatment on the bearing portion (1) to form the bearing surface (1a), and laying the anti-sticking and shock-isolating layer (5) at the protruding position of the longitudinal connecting steel bars (3); The deformable guide block (4) is installed on the anti-sticking and shock-isolating layer (5), and the abutting surface (41) of the deformable guide block (4) is abutted against the longitudinal connecting steel bar (3); Continue pouring the stop block body (2) above the anti-sticking and shock-isolating layer (5) and the bearing surface (1a).

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