Bridge abutment structure of expansion-joint-free bridge and construction method of bridge abutment structure

Abstract

The invention relates to the technical field of bridge abutment structures, and discloses a bridge abutment structure of a non-expansion joint bridge and a construction method thereof.The bridge abutment structure comprises a stand column, a bearing platform is fixedly connected to the upper surface of the stand column, bridge abutment bodies are fixedly connected to the upper surfaces of the left side and the right side of the bearing platform, and waterproof assemblies are fixedly connected to the upper surfaces of the left side and the right side of the bearing platform; a first mounting layer is fixedly connected to the upper surface of the middle of the bearing platform, the outer wall of the waterproof assembly is fixedly connected to the outer wall of the first mounting layer, and the upper surface of the first mounting layer is fixedly connected to the lower surface of the bridge abutment body. Longitudinal slippage of the bridge abutment body can be limited through the bearing platform, the second mounting layer and the bridge deck pavement layer, meanwhile, the buffer blocks and the elastic layer deform synchronously when the bridge abutment body expands or contracts due to temperature, and therefore the connecting stability of all parts of the bridge abutment structure can be enhanced, the bridge abutment body can adapt to deformation caused by factors such as temperature changes, and the service life of the bridge abutment is prolonged. And cracks caused by uncoordinated deformation are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of abutment structures, and in particular to an abutment structure of a bridge without expansion joints and a construction method thereof. Background Art

[0002] Abutments are buildings located at both ends of a bridge, supporting the superstructure of the bridge and connecting to the embankment. As the connection point between the bridge and the embankment, the abutments enable vehicles to smoothly transition between the bridge and the road. Through reasonable connection with the embankment, it ensures the continuity of the road and the comfort of driving, and prevents problems such as vehicles jumping off the bridge head. Abutments usually also have a retaining function, which is used to stabilize the roadbed fill at both ends of the bridge, prevent fill collapse, and maintain the stability of the embankment. For example, in some mountain bridges or bridges on high embankment sections, the retaining function of the abutments is particularly important.

[0003] At present, the abutment structure will expand and contract due to changes in external temperature. When the temperature rises, the abutment extends, and when the temperature drops, the abutment contracts. This causes cracks and fractures in the bridge and abutment structures, which makes it easy for vehicles to have accidents and cause casualties and property losses. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an abutment structure of a bridge without expansion joints and a construction method thereof, which solves the problem that cracks in the abutment structure may occur due to temperature changes, leading to vehicle accidents.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an abutment structure of a bridge without expansion joints, comprising a column, the upper surface of the column is fixedly connected to a pedestal, the upper surfaces of the left and right sides of the pedestal are fixedly connected to an abutment body, the upper surfaces of the left and right sides of the pedestal are fixedly connected to a waterproof component, the middle upper surface of the pedestal is fixedly connected to an installation layer one, the outer wall of the waterproof component is fixedly connected to the outer wall of the installation layer one, the upper surface of the installation layer one is fixedly connected to the lower surface of the abutment body, the side walls of the abutment body are fixedly connected to the outer wall of the waterproof component, the upper surface of the installation layer one is fixedly connected to a buffer block, the upper surface of the buffer block is fixedly connected to an installation layer two, the outer wall of the installation layer two is fixedly connected to a sealing layer, the outer wall of the sealing layer is fixedly connected to a bridge deck pavement, and the outer wall of the bridge deck pavement is fixedly connected to an elastic layer.

[0006] Preferably, the lower surface of the elastic layer is fixedly connected to the upper surface of the second installation layer, the side wall of the bridge deck paving is fixedly connected to the upper surface of the second installation layer, the lower surface of the bridge deck paving is fixedly connected to the upper surface of the abutment body, the lower surface of the sealing layer is fixedly connected to the upper surface of the abutment body, the lower surface of the second installation layer is fixedly connected to the upper surface of the abutment body, and the outer wall of the abutment body is fixedly connected to the outer wall of the buffer block.

[0007] Preferably, the buffer block includes a buffer layer 1, the left outer wall of the buffer layer 1 is fixedly connected to the outer wall of the abutment body, the right outer wall of the buffer layer 1 is fixedly connected to the buffer layer 2, the right outer wall of the buffer layer 2 is fixedly connected to the buffer layer 3, and the inner wall of the buffer layer 1 is fixedly connected to the support column.

[0008] Preferably, the outer wall of the support column is fixedly connected to the inner wall of the second buffer layer, and the outer wall of the support column is fixedly connected to the inner wall of the third buffer layer.

[0009] Preferably, the first buffer layer is made of chloroprene rubber, the second buffer layer is made of ethylene propylene diene rubber, the third buffer layer is made of chlorosulfonated polyethylene rubber, and the support column is made of polyethylene resin.

[0010] Preferably, the waterproof component includes a waterproof layer, the outer wall of the waterproof layer is fixedly connected to the side wall of the abutment body, the lower surface of the waterproof layer is fixedly connected to the upper surface of the pier, the outer wall of the waterproof layer is fixedly connected to the outer wall of the installation layer, and the inner wall of the waterproof layer is fixedly connected to the support layer.

[0011] Preferably, the waterproof layer is made of polyvinyl chloride, and the supporting layer is made of waterproof concrete.

[0012] Preferably, the lower surface of the buffer block is fixedly connected with a connecting block, the upper surface of the mounting layer one is fixedly connected with a fixing block, the interior of the fixed block is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a limiting block one, the outer wall of the rotating shaft is fixedly connected with a limiting block two, the outer wall of the limiting block one is fixedly connected with a transmission block, and the inner wall of the transmission block is provided with a reset spring.

[0013] Preferably, the bottom end of the return spring is arranged on the inner wall of the fixed block, the outer wall of the connecting block is arranged on the side wall of the second limiting block, and the outer wall of the connecting block is arranged on the side wall of the first limiting block.

[0014] Preferably, a construction method of an abutment structure of a bridge without expansion joints comprises the following steps: S1. Bury the columns at the designated location, pour concrete on the upper side of the columns to form a cap, bury the installation layer 1 above the cap, install the buffer block above the installation layer 1, pour concrete on both sides of the installation layer 1 to form the abutment body, bury the waterproof component at the junction of the cap, the installation layer 1 and the abutment body, install the installation layer 2 above the abutment body, pour concrete on both sides of the installation layer 2 to form a bridge deck pavement, pour asphalt between the bridge deck pavements on both sides to form an elastic layer, the cap, the installation layer 2 and the bridge deck pavement can limit the longitudinal slippage of the abutment body, and the buffer block and the elastic layer will deform synchronously when the abutment body expands or contracts due to temperature; S2, arranging and combining the buffer layer 1, the buffer layer 2 and the buffer layer 3 in sequence into a buffer block, and installing a plurality of support columns inside the buffer layer 1, the buffer layer 2 and the buffer layer 3; S3, press the connecting block down to clamp the connecting block into limit block 1 and limit block 2, then limit block 1 and limit block 2 open and accommodate the connecting block, limit block 1 drives the transmission block down, and the return spring undergoes elastic deformation under the drive of the transmission block, and the return spring is used to assist in fixing the connecting block.

[0015] Working principle: By burying the columns at the predetermined location, and then installing the pedestal above the columns, and then installing the installation layer 1 on the upper side of the pedestal, and then installing the buffer block on the installation layer 1, the shape and size of the abutment body are preliminarily set, and then concrete is poured on both sides of the installation layer 1 to form the abutment body, and waterproof components are buried at the junction of the pedestal, the installation layer 1 and the abutment body, and then the installation layer 2 is buried above the abutment body, and then concrete is poured on both sides of the installation layer 2 to form a bridge deck pavement, and asphalt is poured between the bridge deck pavements on both sides to form an elastic layer. The elastic layer can The plies act as buffers to absorb and alleviate the stress caused by these deformations and displacements. The longitudinal slip of the abutment body can be limited through the pedestal, the second installation layer and the bridge deck pavement. At the same time, when the abutment body expands or contracts due to temperature, the buffer block and the elastic layer will deform synchronously, thereby enhancing the connection stability between the various parts of the abutment structure, allowing the abutment to maintain a good structural form under various loads. The abutment body can adapt to deformations caused by factors such as temperature changes, avoid cracks due to uncoordinated deformation, and ensure the stability and reliability of the abutment structure under different environmental conditions.

[0016] A buffer block is formed by combining multiple layers of materials, namely, buffer layer 1, buffer layer 2 and buffer layer 3, and then a plurality of support columns are installed to connect buffer layer 1, buffer layer 2 and buffer layer 3. The support columns are used to improve the overall stability of the buffer block. Buffer layer 1 is composed of chloroprene rubber, which enables the buffer block to provide stable support and withstand a large load, and evenly distribute the force transmitted from the abutment body to the lower structure; while buffer layer 2 is composed of ethylene propylene diene rubber, which enables the buffer block to produce a large elastic deformation when the bridge is deformed, absorb and buffer vibration and displacement; buffer layer 3 is composed of chlorosulfonated polyethylene rubber, which enables the buffer block to protect the internal rubber layer from erosion by rain and chemicals, and also reduce the wear of the buffer block by vehicle loads, so as to withstand a large load and evenly distribute the load to the lower structure, thereby ensuring the stability of the overall structure of the bridge, avoiding damage caused by excessive local force, alleviating vibration and displacement, reducing the vibration amplitude of the abutment structure, reducing the damage to various parts of the abutment caused by vibration, and improving the service life of the abutment and the driving comfort.

[0017] The connecting block is embedded in the internal cavity formed by the limit block one and the limit block two by pressing down the connecting block, and then the limit block one and the limit block two are deformed and the connecting block is fixed. After that, when the limit block one is deformed, the limit block one drives the transmission block to be pressed down, and the reset spring is elastically deformed under the drive of the transmission block, and then the reset spring resets and pushes the transmission block back, which improves the stability of the connecting block. Since the connecting block is connected to the buffer block and the fixed block is buried in the inside of the installation layer one, the buffer block is connected to the installation layer one, so as to facilitate the rapid positioning of the buffer block in the installation position on the surface of the installation layer one, assist the subsequent installation of the buffer block, and at the same time avoid the effect of misalignment of the buffer block installation causing errors in the subsequent pouring of the abutment body.

[0018] The present invention provides an abutment structure of a bridge without expansion joints and a construction method thereof. It has the following beneficial effects: 1. The present invention can limit the longitudinal slippage of the abutment body through the pedestal, the second installation layer and the bridge deck paving. At the same time, when the abutment body expands or contracts due to temperature, the buffer block and the elastic layer will deform synchronously, thereby enhancing the connection stability between the various parts of the abutment structure, so that the abutment can maintain a good structural form under various loads. The abutment body can adapt to deformation caused by factors such as temperature changes, avoid cracks caused by uncoordinated deformation, and ensure the stability and reliability of the abutment structure under different environmental conditions.

[0019] 2. The present invention utilizes a plurality of layers of materials to form a buffer block, and then installs a plurality of support columns to connect buffer layer one, buffer layer two and buffer layer three. Buffer layer one is made of chloroprene rubber, while buffer layer two is made of ethylene propylene diene monomer rubber, and buffer layer three is made of chlorosulfonated polyethylene rubber, so that the abutment can withstand a large load, avoid damage caused by excessive local force, alleviate vibration and displacement, reduce the vibration amplitude of the abutment structure, reduce the damage to various parts of the abutment caused by vibration, and improve the service life of the abutment and driving comfort.

[0020] 3. The present invention embeds the connecting block into the internal cavity formed by the limit block 1 and the limit block 2 by pressing down the connecting block, so that the buffer block is connected to the installation layer 1, so as to facilitate the rapid positioning of the buffer block in the installation position on the surface of the installation layer 1, assist in the subsequent installation of the buffer block, and avoid errors in the subsequent casting of the abutment body caused by misalignment of the buffer block installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional structural schematic diagram of an abutment structure of a bridge without expansion joints proposed by the present invention; Figure 2 A schematic cross-sectional view of the internal structure of a buffer layer of an abutment structure of a bridge without expansion joints proposed by the present invention; Figure 3A schematic diagram of a partial structure of a supporting layer of an abutment structure of a bridge without expansion joints proposed by the present invention; Figure 4 A schematic diagram of the local structure of the second installation layer of the abutment structure of a bridge without expansion joints proposed by the present invention; Figure 5 A schematic diagram of a partial structure of an installation layer of an abutment structure of a bridge without expansion joints proposed by the present invention; Figure 6 for Figure 5 The enlarged schematic diagram at A in the middle; Figure 7 A schematic diagram of a local structure of a connection block of an abutment structure of a bridge without expansion joints proposed by the present invention; Figure 8 The present invention provides a schematic cross-sectional view of the internal structure of a fixed block of an abutment structure of a bridge without expansion joints.

[0022] Among them, 1. column; 2. pedestal; 3. installation layer one; 4. buffer block; 401. buffer layer one; 402. buffer layer two; 403. buffer layer three; 404. support column; 5. installation layer two; 6. abutment body; 7. bridge deck pavement; 8. elastic layer; 9. waterproof component; 901. support layer; 902. waterproof layer; 10. sealing layer; 11. fixed block; 12. rotating shaft; 13. connecting block; 14. limit block one; 15. limit block two; 16. reset spring; 17. transmission block. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Please see attached Figure 1The embodiment of the present invention provides an abutment structure of a bridge without expansion joints, comprising a column 1, the upper surface of the column 1 is fixedly connected with a cap 2, the upper surfaces of the left and right sides of the cap 2 are fixedly connected with a bridge abutment body 6, the upper surfaces of the left and right sides of the cap 2 are fixedly connected with waterproof components 9, the upper surface of the middle part of the cap 2 is fixedly connected with a mounting layer 3, the outer wall of the waterproof component 9 is fixedly connected to the outer wall of the mounting layer 3, the upper surface of the mounting layer 3 is fixedly connected to the lower surface of the bridge abutment body 6, the side wall of the bridge abutment body 6 is fixedly connected to the outer wall of the waterproof component 9, the upper surface of the mounting layer 3 is fixedly connected with a buffer block 4, the upper surface of the buffer block 4 is fixedly connected with a mounting layer 2 5, the outer wall of the mounting layer 2 5 is fixedly connected with a sealing layer 10, the outer wall of the sealing layer 10 is fixedly connected with a bridge deck pavement 7, and the outer wall of the bridge deck pavement 7 is fixedly connected with an elastic layer 8; Specifically, a column 1 is buried at a designated location, and then concrete is poured on the upper side of the column 1 to form a cap 2. Then, an installation layer 3 is buried above the cap 2. The installation layer 3 is made of stainless steel. Stainless steel is a kind of steel that does not rust in weakly corrosive media such as the atmosphere and fresh water. It has good corrosion resistance and oxidation resistance, a small thermal expansion coefficient, and high strength. This allows the installation layer 3 to remain stable in the concrete for a long time, ensuring the adhesion with the concrete, and providing reliable support for the installation of subsequent abutment components. At the same time, a buffer block 4 is installed above the installation layer 3. Then, the shape and size of the abutment body 6 are preliminarily set according to the on-site conditions. Then, concrete is poured on both sides of the installation layer 3 to form the abutment body 6. A waterproof component 9 is buried at the junction of the cap 2, the installation layer 3 and the abutment body 6. The waterproof component 9 fills the gap at the junction and prevents rainwater from penetrating into the bottom layer of the abutment to corrode related components. Then, an installation layer 2 5 is installed above the abutment body 6. The installation layer 2 5 is used to further fix the buffer block 4. Then, the installation layer 2 5 Concrete is poured on both sides to form a bridge deck pavement 7, and asphalt is poured between the bridge deck pavements 7 on both sides to form an elastic layer 8. Asphalt is a dark brown complex mixture composed of hydrocarbons and non-metallic derivatives of different molecular weights, in liquid, semi-solid or solid state, and is a waterproof, moisture-proof and anti-corrosive organic gelling material. Asphalt has good elasticity and flexibility, and can play a buffering role between the bridge deck pavements 7, absorb and alleviate the stress caused by these deformations and displacements, reduce damage to the abutment structure, and extend the service life of the abutment. The longitudinal slip of the abutment body 6 can be limited by the pedestal 2, the installation layer 2 5 and the bridge deck pavement 7. At the same time, when the abutment body 6 expands or contracts due to temperature, the buffer block 4 and the elastic layer 8 will deform synchronously, thereby achieving the effect of enhancing the connection stability between the various parts of the abutment structure, so that the abutment can maintain a good structural form under various loads, and the abutment body 6 can adapt to deformation caused by factors such as temperature changes, avoid cracks due to uncoordinated deformation, and ensure the stability and reliability of the abutment structure under different environmental conditions.

[0025] See attached Figure 1 , the lower surface of the elastic layer 8 is fixedly connected to the upper surface of the second installation layer 5, the side wall of the bridge deck pavement 7 is fixedly connected to the upper surface of the second installation layer 5, the lower surface of the bridge deck pavement 7 is fixedly connected to the upper surface of the abutment body 6, the lower surface of the sealing layer 10 is fixedly connected to the upper surface of the abutment body 6, the lower surface of the second installation layer 5 is fixedly connected to the upper surface of the abutment body 6, and the outer wall of the abutment body 6 is fixedly connected to the outer wall of the buffer block 4; Specifically, a sealing layer 10 is buried at the junction of the installation layer 2 5, the abutment body 6 and the bridge deck pavement 7 to fill the gap at the junction and prevent rainwater from penetrating into the interior of the abutment body 6 and causing corrosion.

[0026] See attached Figure 1 , Attachment Figure 2 and attached Figure 4 The buffer block 4 includes a buffer layer 1 401, the left outer wall of the buffer layer 1 401 is fixedly connected to the outer wall of the abutment body 6, the right outer wall of the buffer layer 1 401 is fixedly connected to the buffer layer 2 402, the right outer wall of the buffer layer 2 402 is fixedly connected to the buffer layer 3 403, and the inner wall of the buffer layer 1 401 is fixedly connected to the support column 404; the outer wall of the support column 404 is fixedly connected to the inner wall of the buffer layer 2 402, and the outer wall of the support column 404 is fixedly connected to the inner wall of the buffer layer 3 403; Specifically, the buffer block 4 is made of a combination of multiple layers of materials, wherein buffer layer 1 401 , buffer layer 2 402 and buffer layer 3 403 are arranged and combined in sequence, and a plurality of support columns 404 connect the buffer layer 1 401 , buffer layer 2 402 and buffer layer 3 403 , and the support columns 404 are used to improve the overall stability of the buffer block 4 .

[0027] See attached Figure 2 The buffer layer 1 401 is made of chloroprene rubber, the buffer layer 2 402 is made of EPDM rubber, the buffer layer 3 403 is made of chlorosulfonated polyethylene rubber, and the support column 404 is made of polyethylene resin; Specifically, chloroprene rubber is a polymer with the characteristics of high hardness and high strength, which enables the buffer block 4 to provide stable support and withstand large loads, and evenly distribute the force transmitted from the abutment body 6 to the lower structure; EPDM rubber is a synthetic rubber with good elasticity and flexibility, and can produce large elastic deformation when the bridge is deformed, absorb and buffer vibration and displacement; chlorosulfonated polyethylene rubber is a special synthetic rubber with good weather resistance and wear resistance, which enables the buffer block 4 to protect the internal rubber layer from erosion by rain and chemicals, and also reduce the wear of the buffer block 4 by vehicle loads, etc., so as to withstand large loads and evenly distribute the load to the lower structure, ensure the stability of the overall structure of the bridge, avoid damage caused by excessive local force, alleviate vibration and displacement, reduce the vibration amplitude of the abutment structure, reduce the damage to various parts of the abutment by vibration, and improve the service life of the abutment and driving comfort.

[0028] See attached Figure 1 and attached Figure 3The waterproof component 9 includes a waterproof layer 902, the outer wall of the waterproof layer 902 is fixedly connected to the side wall of the abutment body 6, the lower surface of the waterproof layer 902 is fixedly connected to the upper surface of the cap 2, the outer wall of the waterproof layer 902 is fixedly connected to the outer wall of the installation layer 3, and the inner wall of the waterproof layer 902 is fixedly connected to the supporting layer 901; the waterproof layer 902 is made of polyvinyl chloride, and the supporting layer 901 is made of waterproof concrete; Specifically, the waterproof component 9 adopts a double-layer structure, in which the outer layer is a waterproof layer 902, and the waterproof layer 902 is made of polyvinyl chloride. Polyvinyl chloride is an amorphous polymer containing a small amount of crystalline structure. Polyvinyl chloride has good chemical corrosion resistance and puncture resistance, which enables the waterproof component 9 to reduce seams and improve the sealing and waterproofing effect; and the supporting layer 901 is the inner layer of the waterproof component 9, and the supporting layer 901 is made of waterproof concrete. Waterproof concrete is a special concrete with high impermeability. By improving the pore structure of the concrete, reducing or blocking the pores and channels inside the concrete, a continuous, closed and dense whole is formed inside the concrete, thereby preventing moisture from penetrating through the pores and cracks inside the concrete under pressure, which enables the supporting layer 901 to have good waterproof performance while maintaining support; combining the advantages of the supporting layer 901 and the waterproof layer 902, the waterproof component 9 can fill the gaps at the junction of different abutment components while playing a role of sealing and waterproofing.

[0029] See attached Figure 5 -Attached Figure 8 The lower surface of the buffer block 4 is fixedly connected with a connecting block 13, the upper surface of the mounting layer 13 is fixedly connected with a fixing block 11, the interior of the fixing block 11 is fixedly connected with a rotating shaft 12, the outer wall of the rotating shaft 12 is fixedly connected with a limiting block 14, the outer wall of the rotating shaft 12 is fixedly connected with a limiting block 2 15, the outer wall of the limiting block 14 is fixedly connected with a transmission block 17, and the inner wall of the transmission block 17 is provided with a reset spring 16; the bottom end of the reset spring 16 is provided on the inner wall of the fixing block 11, the outer wall of the connecting block 13 is provided on the side wall of the limiting block 2 15, and the outer wall of the connecting block 13 is provided on the side wall of the limiting block 14; Specifically, the connecting block 13 is pressed down to insert the connecting block 13 between the limit block 14 and the limit block 15. At this time, the limit block 14 and the limit block 15 are opened and accommodate the connecting block 13. Since the limit block 14 is fixedly connected to the transmission block 17, when the limit block 14 is deformed, the limit block 14 drives the transmission block 17 to be pressed down. Since the transmission block 17 is fixedly connected to the return spring 16, the return spring 16 is elastically deformed on the upper side of the fixed block 11 under the drive of the transmission block 17. When the connecting block 13 is completely inserted between the limit block 14 and the limit block 15, the return spring 16 is elastically deformed on the upper side of the fixed block 11. The spring 16 resets and pushes the transmission block 17 back to further fix the connecting block 13 between the limit block 14 and the limit block 2 15. At the same time, the rotating shaft 12 provides a fixed fulcrum for the limit block 14 and the limit block 2 15. Since the connecting block 13 is fixedly connected to the buffer block 4, the fixed block 11 is buried inside the installation layer 13, which makes the buffer block 4 connected to the installation layer 13, so as to facilitate the rapid positioning of the buffer block 4 in the installation position on the surface of the installation layer 13, assist the subsequent installation of the buffer block 4, and avoid the error in the subsequent casting of the abutment body 6 caused by the misalignment of the buffer block 4.

[0030] See attached Figure 1 -Attached Figure 8 , a construction method for an abutment structure of a bridge without expansion joints, comprising the following steps: S1. Bury a column 1 at a designated location, pour concrete on the upper side of the column 1 to form a cap 2, bury a mounting layer 1 3 above the cap 2, install a buffer block 4 above the mounting layer 1 3, pour concrete on both sides of the mounting layer 1 3 to form an abutment body 6, bury a waterproof component 9 at the intersection of the cap 2, the mounting layer 1 3 and the abutment body 6, install a mounting layer 2 5 above the abutment body 6, pour concrete on both sides of the mounting layer 2 5 to form a bridge deck paving layer 7, pour asphalt between the bridge deck paving layers 7 on both sides to form an elastic layer 8, the cap 2, the mounting layer 2 5 and the bridge deck paving layer 7 can limit the longitudinal slippage of the abutment body 6, and the buffer block 4 and the elastic layer 8 will deform synchronously when the abutment body 6 expands or contracts due to temperature; S2, arranging and combining the buffer layer 1 401, the buffer layer 2 402 and the buffer layer 3 403 in sequence into a buffer block 4, and installing a plurality of support columns 404 inside the buffer layer 1 401, the buffer layer 2 402 and the buffer layer 3 403; S3, press down the connecting block 13 to clamp the connecting block 13 into the limit block 1 14 and the limit block 2 15, then the limit block 14 and the limit block 2 15 open and accommodate the connecting block 13, the limit block 14 drives the transmission block 17 to be pressed down, and the return spring 16 is elastically deformed under the drive of the transmission block 17, and the return spring 16 is used to assist in fixing the connecting block 13.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An abutment structure of a bridge without expansion joints, comprising a column (1), characterized in that: The upper surface of the column (1) is fixedly connected to a pedestal (2), the upper surfaces of the left and right sides of the pedestal (2) are fixedly connected to an abutment body (6), the upper surfaces of the left and right sides of the pedestal (2) are fixedly connected to a waterproof component (9), the upper surface of the middle part of the pedestal (2) is fixedly connected to a mounting layer 1 (3), the outer wall of the waterproof component (9) is fixedly connected to the outer wall of the mounting layer 1 (3), the upper surface of the mounting layer 1 (3) is fixedly connected to the lower surface of the abutment body (6), the side wall of the abutment body (6) is fixedly connected to the outer wall of the waterproof component (9), the upper surface of the mounting layer 1 (3) is fixedly connected to a buffer block (4), the upper surface of the buffer block (4) is fixedly connected to a mounting layer 2 (5), the outer wall of the mounting layer 2 (5) is fixedly connected to a sealing layer (10), the outer wall of the sealing layer (10) is fixedly connected to a bridge deck pavement (7), and the outer wall of the bridge deck pavement (7) is fixedly connected to an elastic layer (8).

2. The abutment structure of a bridge without expansion joints according to claim 1, characterized in that: The lower surface of the elastic layer (8) is fixedly connected to the upper surface of the second installation layer (5), the side wall of the bridge deck pavement (7) is fixedly connected to the upper surface of the second installation layer (5), the lower surface of the bridge deck pavement (7) is fixedly connected to the upper surface of the abutment body (6), the lower surface of the sealing layer (10) is fixedly connected to the upper surface of the abutment body (6), the lower surface of the second installation layer (5) is fixedly connected to the upper surface of the abutment body (6), and the outer wall of the abutment body (6) is fixedly connected to the outer wall of the buffer block (4).

3. The abutment structure of a bridge without expansion joints according to claim 1, characterized in that: The buffer block (4) comprises a buffer layer 1 (401), the left outer wall of the buffer layer 1 (401) being fixedly connected to the outer wall of the abutment body (6), the right outer wall of the buffer layer 1 (401) being fixedly connected to a buffer layer 2 (402), the right outer wall of the buffer layer 2 (402) being fixedly connected to a buffer layer 3 (403), and the inner wall of the buffer layer 1 (401) being fixedly connected to a support column (404).

4. The abutment structure of a bridge without expansion joints according to claim 3, characterized in that: The outer wall of the support column (404) is fixedly connected to the inner wall of the second buffer layer (402), and the outer wall of the support column (404) is fixedly connected to the inner wall of the third buffer layer (403).

5. The abutment structure of a bridge without expansion joints according to claim 3, characterized in that: The first buffer layer (401) is made of chloroprene rubber, the second buffer layer (402) is made of ethylene propylene diene rubber, the third buffer layer (403) is made of chlorosulfonated polyethylene rubber, and the support column (404) is made of polyethylene resin.

6. The abutment structure of a bridge without expansion joints according to claim 1, characterized in that: The waterproof component (9) comprises a waterproof layer (902), the outer wall of the waterproof layer (902) being fixedly connected to the side wall of the abutment body (6), the lower surface of the waterproof layer (902) being fixedly connected to the upper surface of the abutment (2), the outer wall of the waterproof layer (902) being fixedly connected to the outer wall of the first installation layer (3), and the inner wall of the waterproof layer (902) being fixedly connected to the support layer (901).

7. The abutment structure of a bridge without expansion joints according to claim 6, characterized in that: The waterproof layer (902) is made of polyvinyl chloride, and the support layer (901) is made of waterproof concrete.

8. The abutment structure of a bridge without expansion joints according to claim 1, characterized in that: The lower surface of the buffer block (4) is fixedly connected to a connecting block (13), the upper surface of the mounting layer 1 (3) is fixedly connected to a fixing block (11), the interior of the fixing block (11) is fixedly connected to a rotating shaft (12), the outer wall of the rotating shaft (12) is fixedly connected to a limiting block 1 (14), the outer wall of the rotating shaft (12) is fixedly connected to a limiting block 2 (15), the outer wall of the limiting block 1 (14) is fixedly connected to a transmission block (17), and the inner wall of the transmission block (17) is provided with a return spring (16).

9. The abutment structure of a bridge without expansion joints according to claim 8, characterized in that: The bottom end of the return spring (16) is arranged on the inner wall of the fixed block (11), the outer wall of the connecting block (13) is arranged on the side wall of the second limiting block (15), and the outer wall of the connecting block (13) is arranged on the side wall of the first limiting block (14).

10. A construction method for an abutment structure of a bridge without expansion joints, characterized in that: The abutment structure of the expansion joint-free bridge applied to any one of claim 19 comprises the following steps: S1. Bury a column (1) at a designated location, pour concrete on the upper side of the column (1) to form a cap (2), bury a mounting layer (3) above the cap (2), install a buffer block (4) above the mounting layer (3), pour concrete on both sides of the mounting layer (3) to form an abutment body (6), bury a waterproof component (9) at the junction of the cap (2), the mounting layer (3) and the abutment body (6), install a mounting layer (5) above the abutment body (6), pour concrete on both sides of the mounting layer (5) to form a bridge deck pavement (7), pour asphalt between the bridge deck pavements (7) on both sides to form an elastic layer (8), the cap (2), the mounting layer (5) and the bridge deck pavement (7) can limit the longitudinal slippage of the abutment body (6), and when the abutment body (6) expands or contracts due to temperature, the buffer block (4) and the elastic layer (8) will deform synchronously; S2, arranging and combining the buffer layer 1 (401), the buffer layer 2 (402) and the buffer layer 3 (403) in sequence to form a buffer block (4), and installing a plurality of support columns (404) inside the buffer layer 1 (401), the buffer layer 2 (402) and the buffer layer 3 (403); S3, the connecting block (13) is pressed downward to insert the connecting block (13) into the limiting block 1 (14) and the limiting block 2 (15), and then the limiting block 1 (14) and the limiting block 2 (15) are opened and accommodate the connecting block (13), the limiting block 1 (14) drives the transmission block (17) to be pressed downward, and the return spring (16) is elastically deformed under the drive of the transmission block (17), and the return spring (16) is used to assist in fixing the connecting block (13).

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