Airbag type bridge expansion joint device and its manufacturing method

Abstract

The present invention discloses a connecting device for a bridge expansion joint and its usage method, which relates to the field of expansion joint connection. The structure includes a toothed airbag, a cuboid steel plate, a rubber plate, a lower quadrangular pyramid rubber, a lower triangular pyramid rubber, an upper quadrangular pyramid rubber, an upper triangular pyramid rubber, embedded steel bars, through steel bars, concrete, triangular pyramid rubber, a waterproof layer, and a rubber bridge deck. The cuboid steel plate covers the expansion joint, the toothed airbag is placed on the steel cover plate and the rubber plate, and the lower quadrangular pyramid rubber, the lower triangular pyramid rubber, the upper quadrangular pyramid rubber, and the upper triangular pyramid rubber are filled in the gaps around the toothed airbag. The closing steel bars and the embedded steel bars are connected together through the through steel bars and concrete is poured. The waterproof layer is installed under the rubber bridge deck. The present invention solves the vibration problem of the vehicle when passing through the expansion joint, reduces the noise generated by the vehicle driving, ensures the comfort of driving, and at the same time reduces the difficulty of maintenance operations such as snow cleaning on the bridge deck, and also has good waterproof performance.

Description

Technical Field:

[0002] The present invention relates to the field of expansion joint connections, and specifically to an airbag type bridge expansion joint device and its manufacturing method. Background Art:

[0004] After a bridge is successfully built, it will be affected by temperature difference, wind force, vehicle load, etc., resulting in lateral, longitudinal, and vertical deformations of the bridge. The bridge expansion joint is designed to solve this problem.

[0005] After the existing expansion joint device is installed on the bridge, unevenness will occur at the expansion joint, causing vibrations when the vehicle passes through the expansion joint, increasing the vehicle driving noise, affecting the driving comfort, and at the same time affecting the aesthetics and continuity of the bridge deck, and increasing the difficulty of maintenance operations such as snow cleaning on the bridge deck. Summary of the Invention:

[0007] In view of the above problems, the present invention proposes an airbag type bridge expansion joint device, which can ensure the continuity of the bridge and avoid unevenness and water seepage at the expansion joint.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The airbag type bridge expansion joint connection device of the present invention is characterized in that it includes a toothed airbag, a rectangular parallelepiped steel plate, a rubber plate, a lower quadrangular pyramid rubber, a lower triangular pyramid rubber, an upper quadrangular pyramid rubber, an upper triangular pyramid rubber, embedded steel bars, through steel bars, concrete, triangular pyramid rubber, a waterproof layer, and a rubber bridge deck.

[0010] Among them, the rectangular parallelepiped steel plate and the rubber plate are stacked and covered on the expansion joint reserved on the bridge. The toothed airbag is placed on the rectangular parallelepiped steel plate and the rubber plate. The lower quadrangular pyramid rubber, the lower triangular pyramid rubber, the upper quadrangular pyramid rubber, and the upper triangular pyramid rubber are filled in the gaps around the toothed airbag. The embedded steel bars are vertically embedded in the expansion joint of the bridge. The closed steel bars are densely fixed on the side of the toothed airbag. The closed steel bars and the embedded steel bars are connected together by through steel bars and concrete is poured. The waterproof layer and the rubber bridge deck are stacked and arranged on the toothed airbag and the concrete.

[0011] Further, the above-mentioned toothed airbag includes an airbag body and a sealing steel plate. The airbag body and the sealing steel plate form a closed airbag, that is, the toothed airbag is a closed body with a hollow interior filled with air. The outside of the toothed airbag is tooth-shaped. When the two sides of the toothed airbag are subjected to force extrusion, it can contract and deform. An air valve and a barometer are installed on the toothed airbag to monitor the safety of the bridge at all times.

[0012] Further, the top and bottom of the above-mentioned toothed airbag are treated with flat angles to avoid the problem of excessive pressure at the local compression area.

[0013] Furthermore, there are certain thickened protrusions at the connections between both sides of the above-mentioned toothed airbag and the closing steel bars, to prevent the closing steel bars from affecting the airtightness of the toothed airbag when welding with the toothed airbag.

[0014] Furthermore, the above waterproof layer is wavy to have good flexibility;

[0015] Furthermore, between the above cuboid steel plate and the rubber plate, between the waterproof layer and the rubber bridge deck, and between the toothed airbag and the lower quadrangular rubber, lower triangular rubber, upper quadrangular rubber and upper triangular rubber, glue bonding is used, and the glue is water-based non-curing rubber bonding waterproof coating or cold vulcanized glue SK313.

[0016] The manufacturing method of the airbag type bridge expansion joint connecting device of the present invention is characterized in that:

[0017] The first step is to manufacture the toothed airbag in the factory;

[0018] The second step is to weld the closing steel bars along the transverse direction of the toothed airbag. The spacing of the closing steel bars is set according to needs, that is, more are set for bridges with large bearing capacity and fewer are set for bridges with small bearing capacity;

[0019] The third step is to weld and seal both sides of the toothed airbag along the longitudinal direction of the bridge with sealing steel plates. Among them, air valves and barometers are respectively arranged on the sealing steel plates near the edge on one side of the bridge along the longitudinal direction;

[0020] The fourth step is to inflate the toothed airbag through the air valve;

[0021] The fifth step is to cut the concrete bridge deck at the expansion joint reserved on the bridge to expose the stepped expansion joint, cover the stepped groove with a cuboid steel plate, then clean and polish the surfaces of the concrete beams on both sides of the cuboid steel plate, and apply the cold vulcanized glue SK313 at the designated positions on the beam surfaces, and then install the rubber plate on the glue;

[0022] The sixth step is to clean the upper surfaces of the cuboid steel plate and the rubber plate laid in the fifth step, and apply the cold vulcanized glue SK313 at the designated positions above them, and then install the lower quadrangular rubber and the lower triangular rubber at the designated positions above them. Among them, both the lower quadrangular rubber and the lower triangular rubber are made of the same material as the above rubber plate;

[0023] The seventh step is to hoist the manufactured toothed airbag to the corresponding positions above the lower quadrangular rubber and the lower triangular rubber with hoisting equipment;

[0024] The eighth step is to clean and polish the upper surface of the toothed airbag, then apply the cold vulcanized glue SK313 on it, and then install the upper quadrangular rubber and the upper triangular rubber at the glue-applied positions;

[0025] Step 9: Insert the through reinforcement into the middle of the closed reinforcement and the embedded reinforcement, tie and fix the closed reinforcement and the embedded reinforcement, and then pour the concrete. The pouring height is flush with the top surfaces of the frustum rubber and triangular frustum rubber in Step 8.

[0026] Step 10: Clean and polish the upper frustum rubber and upper triangular frustum rubber, apply the cold vulcanized glue SK313 on them, and then install the triangular frustum rubber above the applied glue.

[0027] Step 11: Apply a waterproof layer along the upper surfaces of the triangular frustum rubber and the poured concrete. The waterproof layer bends 90° upward at the edge of the poured concrete and is laid upward for a section on the side surface of the concrete bridge deck to enhance the waterproof performance.

[0028] Step 12: Clean the waterproof layer and the concrete bridge deck, apply the water-based non-curing rubber bonding waterproof coating on the waterproof layer, and apply the cold vulcanized glue SK313 on the side surface of the concrete bridge deck where there is no waterproof layer. Finally, install the corresponding rubber bridge deck above the glue.

[0029] Compared with the prior art, the beneficial effects of the present invention include:

[0030] 1. The airbag type bridge expansion joint connecting device of the present application can make the bridge expansion joint flat, solve the vibration problem when the vehicle passes through the expansion joint, reduce the noise caused by vehicle driving, ensure the comfort of driving, and at the same time reduce the difficulty of maintenance operations such as snow cleaning on the bridge deck.

[0031] 2. The airbag type bridge expansion joint connecting device of the present application is provided with a wavy waterproof layer, which has both good flexibility and good extensibility.

[0032] 3. The airbag type bridge expansion joint connecting device of the present application has a simple structure and is convenient for construction and maintenance. Description of the Drawings:

[0034] Figure 1 is the structural schematic diagram of the present invention;

[0035] Figure 2 is the front view structural schematic diagram of the present invention;

[0036] Figure 3 is the tooth-shaped airbag structure and partial connection schematic diagram of the present invention;

[0037] Figure 4 is the structural schematic diagram of the steel cover plate of the present invention;

[0038] Figure 5 is the schematic diagram of the sealing steel plate of the present invention;

[0039] Figure 6 is the schematic diagram of the lower triangular frustum rubber of the present invention;

[0040] Figure 7 Schematic diagram of the lower frustum rubber of the present invention;

[0041] Figure 8 Schematic diagram of the upper triangular frustum rubber of the present invention;

[0042] Figure 9 Schematic diagram of the upper frustum rubber of the present invention;

[0043] Figure 10 Schematic diagram of the construction process of the airbag type bridge expansion joint device;

[0044] Explanation of reference numerals: 1. Tooth-shaped airbag, 1-1. Airbag body, 1-2. Closing steel bar, 1-3. Sealing steel plate, 1-4. Air valve, 1-5. Barometer, 2. Expansion joint, 3. Concrete bridge deck, 4. Cuboid steel plate, 5. Beam, 6. Rubber plate, 7. Lower frustum rubber, 8. Lower triangular frustum rubber, 9. Upper frustum rubber, 10. Upper triangular frustum rubber, 11. Embedded steel bar, 12. Penetrating steel bar, 13. Concrete, 14. Triangular frustum rubber, 15. Waterproof layer, 16. Rubber bridge deck Detailed implementation method:

[0046] To make the problems solved, the technical solutions adopted, and the benefits achieved by the present invention clearer, the following will further explain the present invention in combination with the drawings and implementation methods. In addition, the embodiments described in this application are only used to explain the present invention, but are not limited to the invention, and its protection scope is not limited to the following description.

[0047] The airbag type bridge expansion joint connection device of the present invention includes a tooth-shaped airbag 1, a cuboid steel plate 4, a rubber plate 6, a lower frustum rubber 7, a lower triangular frustum rubber 8, an upper frustum rubber 9, an upper triangular frustum rubber 10, an embedded steel bar 11, a closing steel bar 1-2, a penetrating steel bar 12, concrete 13, a triangular frustum rubber 14, a waterproof layer 15, and a rubber bridge deck 16.

[0048] The cuboid steel plate 4 has dimensions equivalent to those of the rubber plate 6. The lower frustum rubber 7, the lower triangular frustum rubber 8, the upper frustum rubber 9, and the upper triangular frustum rubber 10 are rubber strips with a trapezoidal or triangular cross-section. The embedded steel bar 11 is a vertical steel bar buried in the beam 5. The closing steel bar 1-2 is U-shaped, and its opening is welded and fixed to the side of the tooth-shaped airbag 1, and the number can be 10-20. The penetrating steel bar 12 is a straight steel bar.

[0049] Among them, the cuboid steel plate 5 and the rubber plate 6 are stacked and covered on the expansion joint reserved on the bridge. The toothed airbag 1 is placed on the cuboid steel plate and the rubber plate 6. The lower quadrangular prism rubber 7, the lower triangular prism rubber 8, the upper quadrangular prism rubber 9 and the upper triangular prism rubber 10 are filled in the gaps around the toothed airbag 1. The embedded steel bars 11 are vertically embedded in the expansion joint of the bridge. After the toothed airbag 1 is placed in the expansion joint, the closing steel bars 1-2 are adjacent to the embedded steel bars 11. The through steel bars 12 pass through each closing steel bar 1-2 and are connected together by binding straps and then concrete 13 is poured. The waterproof layer 15 and the rubber bridge deck 16 are stacked on the toothed airbag 1 and the concrete 13.

[0050] Among them, the toothed airbag 1 includes an airbag body 1-1 and a sealing steel plate 1-3. The airbag body 1-1 and the sealing steel plate 1-3 form a closed airbag body, that is, the toothed airbag 1 is a closed body with a hollow interior filled with air. The outside of the toothed airbag 1 is tooth-shaped. When the two sides of the toothed airbag 1 are subjected to force extrusion, it can contract and deform. An air valve 1-4 and a barometer 1-5 are installed on the toothed airbag 1 to monitor the safety of the bridge at all times.

[0051] In order to avoid the problem of excessive pressure at the local compression point, the top and bottom of the toothed airbag 1 are treated with flat angles; there is a certain thickening protrusion at the connection between the two sides of the toothed airbag 1 and the closing steel bars 1-2 to avoid affecting the airtightness of the toothed airbag 1 when the closing steel bars 1-2 are welded to the toothed airbag 1.

[0052] In order to have good flexibility, the waterproof layer 15 is wavy.

[0053] In order to ensure firm connection, glue is used to bond between the cuboid steel plate 5 and the rubber plate 6, between the waterproof layer 15 and the rubber bridge deck 16, and between the toothed airbag 1 and the lower quadrangular prism rubber 7, the lower triangular prism rubber 8, the upper quadrangular prism rubber 9 and the upper triangular prism rubber 10. The glue is water-based non-curing rubber bonding waterproof coating or cold vulcanized glue SK313.

[0054] The specific manufacturing method of the airbag type bridge expansion joint connection device of the present invention:

[0055] The first step is to manufacture the toothed airbag 1 in the factory. Since the toothed airbag 1 is designed for small bridges and its length is not very long, steel can be selected according to the load-bearing capacity of the bridge, and then the steel is melted into a liquid and injected into the toothed mold to manufacture the airbag body 1-1 of the toothed airbag 1, and it is taken out after cooling.

[0056] The second step is to weld the closing steel bars 1-2 along the transverse direction of the bridge of the toothed airbag 1. The spacing of the closing steel bars 1-2 is set according to needs, that is, more are set for large bridge load-bearing and fewer are set for small load-bearing.

[0057] In the third step, the tooth-shaped airbag is sealed by welding the sealing steel plates 1-3 on both sides along the bridge direction, and each tooth-shaped part is welded to the airbag body 1-1 respectively; among them, air valves 1-4 and barometers 1-5 are respectively arranged on the sealing steel plates 1-3 that are close to the edges on both sides of a certain side of the bridge along the bridge direction;

[0058] In the fourth step, the tooth-shaped airbag 1 is inflated through the air valve 1-4. The amount of inflation is calculated according to the load-bearing capacity of the bridge, and an appropriate amount is sufficient, that is, to ensure that there is enough air pressure in the tooth-shaped airbag 1 without causing insufficient load-bearing, and also to prevent the problem that the air pressure in the tooth-shaped airbag 1 is too large, resulting in insufficient elasticity and poor stretchability of the tooth-shaped airbag 1;

[0059] The following is the installation of the airbag 1, etc., in combination with Figure 10 the construction flow chart;

[0060] In the fifth step, at the expansion joint 2 reserved on the bridge, cut the concrete bridge deck 3 to expose the expansion joint 2, cover it with a cuboid steel plate 4, then clean and polish the surfaces of the concrete beams 5 on both sides of the cuboid steel plate 4, and apply the cold vulcanized glue SK313 at the designated positions on its beam surface. Then install the high-strength, high-elasticity, and high-abrasion rubber plate 6 on the glue. Here, the glue is used to bond the rubber plate 6 to play a fixing role and facilitate subsequent construction;

[0061] In the sixth step, clean and polish the upper surfaces of the cuboid steel plate 4 and the rubber plate 6 laid in the fifth step, and apply the cold vulcanized glue SK313 at the designated positions above them. Then install the lower quadrangular prism rubber 7 and the lower triangular prism rubber 8 at the designated positions above them. Among them, both the lower quadrangular prism rubber 7 and the lower triangular prism rubber 8 are made of the same high-strength, high-elasticity, and high-abrasion materials as the above-mentioned rubber plate 6. The glue is used here to play a fixing role and facilitate subsequent construction;

[0062] In the seventh step, lift the fabricated tooth-shaped airbag 1 to the corresponding position above the lower quadrangular prism rubber 7 and the lower triangular prism rubber 8 by a hoisting device, a crane;

[0063] In the eighth step, clean and polish the upper surface of the tooth-shaped airbag 1, then apply the cold vulcanized glue SK313 on it, and then install the upper quadrangular prism rubber 9 and the upper triangular prism rubber 10 at the place where the glue is applied;

[0064] In the ninth step, insert the through-bar 12 between the closed steel bar 1-2 and the embedded steel bar 11, and tie and fix the closed steel bar 1-2 and the embedded steel bar 11. Then pour the concrete 13, and the pouring height is flush with the top surfaces of the quadrangular prism rubber 9 and the triangular prism rubber 10 in the eighth step;

[0065] In the tenth step, clean and polish the upper quadrangular prism rubber 9 and the upper triangular prism rubber 10, and apply the cold vulcanized glue SK313 at the specified positions. Then install the triangular prism rubber 14 above the place where the glue is applied;

[0066] In the eleventh step, apply a waterproof layer 15 on the upper surfaces of the triangular prism rubber 14 and the cast concrete 13, and bend the waterproof layer 15 upward by 90° at the edge of the cast concrete 13, that is, lay a section upward on the side surface of the concrete bridge deck 3 to enhance the waterproof performance. Among them, the wavy waterproof layer structure formed above the toothed airbag 1 not only has good waterproof performance but also has good telescopic performance;

[0067] In the twelfth step, clean the waterproof layer 15 and the concrete bridge deck 3, apply a water-based non-curing rubber bonding waterproof coating on the waterproof layer 15, and apply cold vulcanized glue SK313 on the side surface of the concrete bridge deck 3 where there is no waterproof layer 15. Finally, install the corresponding rubber bridge deck 16 above the glue.

Claims

1. An airbag type bridge expansion joint connecting device, characterized in that: it includes a toothed airbag (1), a cuboid steel plate (4), a rubber plate (6), a lower quadrangular frustum rubber (7), a lower triangular frustum rubber (8), an upper quadrangular frustum rubber (9), an upper triangular frustum rubber (10), embedded steel bars (11), through steel bars (12), concrete (13), triangular frustum rubber (14), a waterproof layer (15), and a rubber bridge deck (16). Among them, the cuboid steel plate (4) and the rubber plate (6) are stacked and covered on the expansion joint reserved on the bridge. The toothed airbag (1) is placed on the cuboid steel plate and the rubber plate (6). The lower quadrangular frustum rubber (7), the lower triangular frustum rubber (8), the upper quadrangular frustum rubber (9), and the upper triangular frustum rubber (10) are filled in the gaps around the toothed airbag (1). The embedded steel bars (11) are vertically embedded in the expansion joint of the bridge. The closed steel bars (1-2) are densely fixed on the side of the toothed airbag (1). The closed steel bars (1-2) and the embedded steel bars (11) are connected together by the through steel bars (12) and concrete (13) is poured. The triangular frustum rubber (14), the waterproof layer (15), and the rubber bridge deck (16) are stacked and arranged on the upper surface of the toothed airbag (1) and the concrete (13). The toothed airbag (1) includes a bladder body (1-1) and a sealing steel plate (1-3). The bladder body (1-1) and the sealing steel plate (1-3) form a closed bladder, that is, the toothed airbag (1) is a closed body with a hollow interior, and its interior is filled with air. The outside of the toothed airbag (1) is tooth-shaped. When the two sides of the toothed airbag (1) are stressed and squeezed, it can contract and deform. An air valve (1-4) and a barometer (1-5) are installed on the toothed airbag (1) to be used for monitoring the safety situation of the bridge at all times. The waterproof layer (15) is wavy to have good flexibility. Between the cuboid steel plate (4) and the rubber plate (6), between the waterproof layer (15) and the rubber bridge deck (16), and between the toothed airbag (1) and the lower quadrangular frustum rubber (7), the lower triangular frustum rubber (8), the upper quadrangular frustum rubber (9), and the upper triangular frustum rubber (10), glue is used for bonding. The glue is a water-based non-curing rubber bonding waterproof coating or cold vulcanized glue SK313.

2. An airbag type bridge expansion joint connecting device according to claim 1, characterized in that: the top and bottom of the toothed airbag (1) are treated with flat angles.

3. An airbag type bridge expansion joint connecting device according to claim 1, characterized in that: the connection parts between the two sides of the toothed airbag (1) and the closed steel bars (1-2) are thickened and protruded to avoid affecting the airtightness of the toothed airbag (1) when the closed steel bars (1-2) are welded to the toothed airbag (1).

4. A manufacturing method of an airbag type bridge expansion joint connecting device according to any one of claims 1-3, characterized in that: the first step is to manufacture the toothed airbag in a factory; the second step is to weld the closed steel bars along the transverse direction of the bridge of the toothed airbag. The spacing of the closed steel bars is set according to needs, that is, more are set if the bridge load is large, and fewer are set if the load is small. In the third step, the tooth-shaped airbag is sealed with sealing steel plates welded on both sides along the bridge direction. Among them, air valves and barometers are respectively arranged on the sealing steel plates near the edge on one side of the bridge along the bridge direction; In the fourth step, the tooth-shaped airbag is inflated through the air valve; In the fifth step, at the expansion joint reserved on the bridge, the concrete bridge deck is cut to expose the stepped expansion joint, and a rectangular steel plate is covered on the stepped groove. Then, the surfaces of the concrete beams on both sides of the rectangular steel plate are cleaned and polished, and cold vulcanized glue SK313 is applied at the designated positions on their beam surfaces. Then, the rubber plate is installed on the glue; In the sixth step, the upper surfaces of the rectangular steel plate and the rubber plate laid in the fifth step are cleaned, and cold vulcanized glue SK313 is applied at the designated positions above them. Then, the lower quadrangular prism rubber and the lower triangular prism rubber are installed at the designated positions above them. Among them, both the lower quadrangular prism rubber and the lower triangular prism rubber are made of the same material as the above rubber plate; In the seventh step, the fabricated tooth-shaped airbag is hoisted to the corresponding position above the lower quadrangular prism rubber and the lower triangular prism rubber by a hoisting device; In the eighth step, the upper surface of the tooth-shaped airbag is cleaned and polished, and then cold vulcanized glue SK313 is applied on it. Then, the upper quadrangular prism rubber and the upper triangular prism rubber are installed at the glue-applied positions; In the ninth step, a through steel bar is inserted between the closed steel bar and the embedded steel bar, and the closed steel bar and the embedded steel bar are tied and fixed. Then, concrete is poured, and the pouring height is level with the top surfaces of the quadrangular prism rubber and the triangular prism rubber in the eighth step; In the tenth step, the upper quadrangular prism rubber and the upper triangular prism rubber are cleaned and polished, and cold vulcanized glue SK313 is applied on them. Then, the triangular prism rubber is installed above the glue-applied position; In the eleventh step, a waterproof layer is applied along the upper surfaces of the triangular prism rubber and the poured concrete, and the waterproof layer is bent 90° upward at the edge of the poured concrete and laid upward for a section on the side surface of the concrete bridge deck to enhance the waterproof performance; In the twelfth step, the waterproof layer and the concrete bridge deck are cleaned, and water-based non-curing rubber bonding waterproof coating is applied on the waterproof layer, and cold vulcanized glue SK313 is applied on the side surface of the concrete bridge deck where there is no waterproof layer. Finally, the corresponding rubber bridge deck is installed above the glue.

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