A bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device and construction method thereof

Abstract

The present invention discloses a boltless maintenance-free shock-absorbing and noise-reducing bridge telescopic device and a construction method thereof, which relates to the field of bridge telescopic devices, and includes a first telescopic beam body and a second telescopic beam body, wherein the second telescopic beam body is arranged on the outer side of the first telescopic beam body; the lower ends of the first telescopic beam body and the second telescopic beam body are fixedly connected with nested docking pieces, and the nested docking pieces at the lower ends of the first telescopic beam body and the second telescopic beam body are staggered. The boltless maintenance-free shock-absorbing and noise-reducing bridge telescopic device and a construction method thereof, through the nested docking piece, performs a resistance support anti-detachment treatment on the lower end of the rubber reserved docking piece, thereby avoiding the loosening phenomenon of the traditional bolt docking structure during long-term pressure, allowing the equipment to improve its bearing strength during long-term pressure, and avoiding a large bearing pressure caused by the bottom gravity of the passing vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion devices, and in particular to a bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device and a construction method thereof. Background Art

[0002] The bridge expansion device is a device that is adapted to allow vehicles to pass smoothly through the bridge deck and meet the needs of deformation of the bridge superstructure. Its quality determines the overall quality of the bridge. For example, the patent with publication number CN118166647A discloses a bridge expansion joint structure and a construction method for a bridge expansion joint structure, wherein the bridge expansion joint structure includes an asphalt layer, a rubber layer, an airbag, a concrete layer, and a base. The rubber layer is connected to the concrete layer through the base, and the airbag is located at the first gap between the two ends of the rubber layer and the concrete layer. The asphalt layer is connected to the upper surface of the rubber layer and is located on the upper surface of the airbag, so that the rubber layer of the bridge expansion joint structure can be prefabricated, reducing the on-site operation hours; making its sealing effect similar to that of elastic materials solidified on-site; the rubber layer and the asphalt layer are combined, so that there is no need to embed steel plates in the rubber layer to provide support for vehicles on the bridge deck, the cross-sectional shape of the rubber layer is simple and not easy to accumulate water, and the coverage of the asphalt layer brings a good invisible effect, avoiding the technical defects of the prior art; Another example is the connection structure of a bridge expansion joint in the patent with publication number CN214089457U, which includes a bridge expansion fixing, a connecting plate and a bridge expansion connecting member. A side wall of the bridge expansion fixing is provided with a plurality of anchoring bars, and a partition plate is provided on the top of the beam expansion fixing; a side wall of the bridge expansion connecting member is provided with a plurality of anchoring bars, and a limit stopper is symmetrically provided on the top of the beam expansion connecting member, and a fixing seat is provided inside the bridge expansion connecting member. By using the bridge expansion fixing, bridge expansion connecting member, fixing seat, rotating roller, damping spring and connecting plate, the expansion or contraction due to the change of temperature can be better moved by using the box, anchoring bars and reinforcing bars; For example, the patent with publication number CN220224923U is a bridge expansion device, which belongs to the field of bridge engineering technology, and solves the problem that a large amount of debris will enter the surface of the rubber belt of the traditional expansion device during long-term use, affecting the expansion effect, and the rubber belt is exposed to the sun for a long time, and the rubber belt is easily damaged; Most of the above-mentioned existing technologies have improved their overall structure, and the existing bridge expansion devices are mostly connected by bolts during use, and the bolted connection structure will become loose during long-term pressure, and when it is exposed to long-term pressure, it is very easy to cause a large bearing pressure due to the gravity of the bottom of the passing vehicles, resulting in a reduction in its service life. Summary of the invention

[0003] The purpose of the present invention is to provide a boltless, maintenance-free, shock-absorbing and noise-reducing bridge expansion device and a construction method thereof, so as to solve the problem that the bolted joint structure proposed in the above background technology will become loose during long-term pressure, and when it is exposed to long-term pressure, it is very easy to cause a large bearing pressure on the bottom gravity of passing vehicles, resulting in a reduction in its service life.

[0004] To achieve the above object, the present invention provides the following technical solutions: a bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge telescopic device and a construction method thereof, comprising a first telescopic beam body and a second telescopic beam body, wherein the second telescopic beam body is arranged on the outer side of the first telescopic beam body; The lower ends of the first telescopic beam body and the second telescopic beam body are both fixedly connected with nested docking pieces, and the nested docking pieces at the lower ends of the first telescopic beam body and the second telescopic beam body are staggered, and the inner sides of the lower ends of the first telescopic beam body and the second telescopic beam body are provided with transverse guide grooves, and the transverse guide grooves are nested and docked with the nested docking pieces, and a rubber reserved docking piece is docked between the first telescopic beam body and the second telescopic beam body, and an auxiliary positioning structure is provided on the inner sides of the first telescopic beam body and the second telescopic beam body, and the supporting state of the rubber reserved docking piece is adjusted by the auxiliary positioning structure; the inner sides of the upper ends of the first telescopic beam body and the second telescopic beam body are provided with an auxiliary noise reduction structure, and the bearing stability of the equipment is adjusted by the auxiliary noise reduction structure.

[0005] Furthermore, the auxiliary positioning structure is provided with a reserved steel wire rope, and the reserved steel wire rope is butt-jointed with the outer side of the nested docking piece, and the reserved steel wire rope passes through the inner side of the first telescopic beam body, a vertical reserved sliding groove is opened on the inner side of the first telescopic beam body, and a guiding docking movable part is nested and installed on the outer side of the vertical reserved sliding groove, and the outer side of the guiding docking movable part is butt-jointed with the end of the reserved steel wire rope.

[0006] Furthermore, a resisting nested docking piece is nested on the upper end of the guide docking movable piece, and a first built-in reserved liquid capsule is bonded and connected to the inner side of the resisting nested docking piece, and the positions of the first built-in reserved liquid capsule and the guide docking movable piece correspond to each other.

[0007] Furthermore, during the extension movement of the first telescopic beam body and the second telescopic beam body through the nested docking parts, the nested docking parts drive the guide docking movable parts and the resisting nested docking parts to move upward synchronously through the reserved steel wire rope.

[0008] Furthermore, during the upward movement of the guiding docking movable part and the abutting nested docking part, the first built-in reserved liquid bag inside is pressurized in advance, and the lower end of the rubber reserved docking part is supported and prevented from falling off by the abutting nested docking part.

[0009] Furthermore, the auxiliary noise reduction structure is provided with a first reserved supply hose, and the first reserved supply hose is connected to a first built-in reserved liquid bag, the first reserved supply hose passes through the inner side of the first telescopic beam body, the inner side of the first telescopic beam body is bonded with a second built-in reserved liquid bag, and the second built-in reserved liquid bag is connected to an end of the first reserved supply hose.

[0010] Furthermore, the upper end of the first reserved supply hose is connected to the second reserved supply hose, and the upper end of the second reserved supply hose is connected to the third built-in reserved liquid bag, and the third built-in reserved liquid bag is arranged at the upper end of the first telescopic beam body, and the upper end of the first telescopic beam body is bonded with an external flexible pressure relief part.

[0011] Furthermore, during the process that the first built-in reserved liquid bag is pressurized, the first reserved supply hose is used to supply the inner side of the second built-in reserved liquid bag, and the butt gap between the first telescopic beam body and the rubber reserved butt piece is filled by the expanded second built-in reserved liquid bag; the first reserved supply hose cooperates with the second reserved supply hose at the upper end to synchronously supply the inner side of the third built-in reserved liquid bag, thereby pushing the external flexible pressure relief piece at the upper end to bulge outward for support.

[0012] A bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion and contraction device is disclosed, and a construction method of the bridge expansion and contraction device is disclosed. The specific method steps are as follows: S1: The first telescopic beam body and the second telescopic beam body can be extended laterally through the rubber reserved docking piece according to the supporting state of the bridge. The outward-moving nested docking piece will drive the guide docking movable piece and the abutting nested docking piece to move upward synchronously through the reserved steel wire rope, and then the lower end of the rubber reserved docking piece will be abutted against the support and prevented from falling off through the abutting nested docking piece; S2: During the upward movement of the guiding docking movable part and the resisting nested docking part, they will simultaneously apply pressure to the first built-in reserved liquid bag inside, so that the first built-in reserved liquid bag can supply liquid to the inside of the second built-in reserved liquid bag through the first reserved supply hose, so that the second built-in reserved liquid bag can expand to fill the docking gap between the rubber reserved docking part and the first telescopic beam body, and seal the inside to avoid the influence caused by long-term infiltration of rainwater, etc.; S3: The sound insulation state between the first telescopic beam body and the second telescopic beam body is controlled by the sealing structure in the auxiliary noise reduction structure to prevent the noise from being transmitted downward to form an echo, thereby assisting the noise reduction process; S4: During the supply operation of the first reserved supply hose, the second reserved supply hose at the upper end performs synchronous supply operation to the inner side of the third built-in reserved liquid bag, thereby pushing the external flexible pressure relief part at the upper end to bulge outward for support, thereby effectively performing pressure relief support operation on the upper end during the movement of passing vehicles.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge telescopic device and its construction method are provided with an auxiliary positioning structure, through which the supporting state of the rubber reserved docking piece is adjusted, the overall first telescopic beam body and the second telescopic beam body can be transversely extended through the rubber reserved docking piece according to the supporting state of the bridge, and the staggered nested docking pieces at the lower end thereof can stably perform transverse support work, and the outwardly moved nested docking piece will drive the guide docking movable piece and the resisting nested docking piece to move upward synchronously through the reserved steel wire rope, and then the lower end of the rubber reserved docking piece is resisted and supported to prevent detachment through the resisting nested docking piece, so as to avoid the loosening phenomenon of the traditional bolt docking structure during long-term pressure, so that the equipment can improve its bearing strength during long-term pressure, avoid the large bearing pressure caused by the gravity on the bottom of the passing vehicle, and improve the service life of the overall equipment; Furthermore, an auxiliary noise reduction structure is provided, and the bearing stability of the equipment is adjusted by the auxiliary noise reduction structure. In the process of the guiding docking movable part and the resisting nested docking part moving upward, it will simultaneously pressurize the first built-in reserved liquid bag on the inside, so that the first built-in reserved liquid bag can supply the inside of the second built-in reserved liquid bag through the first reserved supply hose, and the second built-in reserved liquid bag can expand to fill the docking gap between the rubber reserved docking part and the first telescopic beam body, and the inside thereof is sealed to avoid the influence caused by long-term infiltration of rainwater, etc., and the sound insulation state between the first telescopic beam body and the second telescopic beam body is controlled through the sealed structure to avoid the noise from being transmitted downward to form an echo, thereby assisting the noise reduction process; Furthermore, during the supply operation of the first reserved supply hose, it will cooperate with the second reserved supply hose at the upper end to perform synchronous supply operation to the inner side of the third built-in reserved liquid bag, thereby pushing the external flexible pressure relief part at the upper end to bulge outward for support, thereby allowing the upper end of the passing vehicles to be effectively supported for pressure relief during movement, thereby avoiding direct contact vibration force that reduces its service life. At the same time, passing vehicles can effectively perform shock-absorbing and pressure-relieving treatment through the contact between the arc-shaped external flexible pressure relief part and the third built-in reserved liquid bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 The enlarged structural diagram is shown in the figure; Figure 3 It is a schematic diagram of a partial three-dimensional structure of a first telescopic beam body of the present invention; Figure 4This is a schematic diagram of the three-dimensional structure of the rubber reserved docking piece of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the external flexible pressure relief member of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the first reserved supply hose of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the first built-in reserved liquid capsule of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the third built-in reserved liquid capsule of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the guide docking movable part of the present invention.

[0015] In the figure: 1. first telescopic beam body; 2. second telescopic beam body; 3. nested docking piece; 4. transverse guide groove; 5. rubber reserved docking piece; 6. reserved steel wire rope; 7. guide docking movable part; 8. abutting nested docking piece; 9. first built-in reserved liquid bag; 10. vertical reserved slide groove; 11. first reserved supply hose; 12. second built-in reserved liquid bag; 13. second reserved supply hose; 14. third built-in reserved liquid bag; 15. external flexible pressure relief piece. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0017] Example 1: Please refer to Figure 1-9 The present invention provides the following technical solutions: a bolt-free maintenance-free shock-absorbing and noise-reducing bridge telescopic device and a construction method thereof, comprising a first telescopic beam body 1, a second telescopic beam body 2, a nested docking piece 3, a transverse guide groove 4, a rubber reserved docking piece 5, a reserved steel wire rope 6, a guide docking movable piece 7, a resisting nested docking piece 8, a first built-in reserved liquid capsule 9, a vertical reserved chute 10, a first reserved supply hose 11, a second built-in reserved liquid capsule 12, a second reserved supply hose 13, a third built-in reserved liquid capsule 14, and an external flexible pressure relief piece 15; A second telescopic beam body 2 is arranged on the outer side of the first telescopic beam body 1; a nested docking piece 3 is fixedly connected to the lower ends of the first telescopic beam body 1 and the second telescopic beam body 2, and the nested docking pieces 3 at the lower ends of the first telescopic beam body 1 and the second telescopic beam body 2 are staggered, a transverse guide groove 4 is provided on the inner side of the lower ends of the first telescopic beam body 1 and the second telescopic beam body 2, and the transverse guide groove 4 is nested and docked with the nested docking piece 3, a rubber reserved docking piece 5 is docked between the first telescopic beam body 1 and the second telescopic beam body 2, and an auxiliary positioning structure is arranged on the inner side of the first telescopic beam body 1 and the second telescopic beam body 2, and the supporting state of the rubber reserved docking piece 5 is adjusted by the auxiliary positioning structure; The auxiliary positioning structure is provided with a reserved steel wire rope 6, and the reserved steel wire rope 6 is butted with the outer side of the nested docking piece 3, and the reserved steel wire rope 6 runs through the inner side of the first telescopic beam body 1, and a vertical reserved slide groove 10 is provided on the inner side of the first telescopic beam body 1, and a guide docking movable part 7 is nested and installed on the outer side of the vertical reserved slide groove 10, and the outer side of the guide docking movable part 7 is butted with the end of the reserved steel wire rope 6. The upper end of the guide docking movable part 7 is nested with a resisting nested docking piece 8, and the inner side of the resisting nested docking piece 8 is bonded and connected with a first built-in reserved liquid capsule 9, and the positions of the first built-in reserved liquid capsule 9 and the guide docking movable part 7 correspond to each other. In the process of the first telescopic beam body 1 and the second telescopic beam body 2 extending and moving through the nested docking piece 3, the nested docking piece 3 drives the guide docking movable part 7 and the resisting nested docking piece 8 to move upward synchronously through the reserved steel wire rope 6.

[0018] During the upward movement of the guide docking movable part 7 and the nested docking part 8, the first built-in reserved liquid capsule 9 on the inside will be pre-pressed, and the lower end of the rubber reserved docking part 5 will be supported and prevented from falling off by the nested docking part 8. The first telescopic beam body 1 and the second telescopic beam body 2 can be extended laterally through the reserved rubber docking part 5 according to the supporting state of the bridge, and the staggered nested docking parts 3 at the lower end can stably support the horizontal direction, and the nested docking parts 3 moved outward will drive the guide docking movable part 7 and the nested docking part 8 to move upward synchronously through the reserved steel wire rope 6, and then the lower end of the rubber reserved docking part 5 will be supported and prevented from falling off by the nested docking part 8, so as to avoid the loosening of the traditional bolt docking structure during long-term pressure, so as to improve the bearing strength of the equipment during the long-term pressure, and avoid the large bearing pressure caused by the bottom gravity of the passing vehicle.

[0019] Embodiment 2: Based on Embodiment 1, an auxiliary noise reduction structure is also disclosed, and its specific structure is as follows: An auxiliary noise reduction structure is provided on the inner side of the upper ends of the first telescopic beam body 1 and the second telescopic beam body 2, and the bearing stability of the equipment is adjusted by the auxiliary noise reduction structure.

[0020] The auxiliary noise reduction structure is provided with a first reserved supply hose 11, and the first reserved supply hose 11 is connected to the first built-in reserved liquid capsule 9, the first reserved supply hose 11 runs through the inner side of the first telescopic beam body 1, the inner side of the first telescopic beam body 1 is bonded with a second built-in reserved liquid capsule 12, and the second built-in reserved liquid capsule 12 is connected to the end of the first reserved supply hose 11. The upper end of the first reserved supply hose 11 is connected to the second reserved supply hose 13, and the upper end of the second reserved supply hose 13 is connected to the third built-in reserved liquid capsule 14, and the third built-in reserved liquid capsule 14 is arranged at the upper end of the first telescopic beam body 1, and the upper end of the first telescopic beam body 1 is bonded with an external flexible pressure relief member 15. During the process of the first built-in reserved liquid capsule 9 being pressurized, the first reserved supply hose 11 is used to supply the inner side of the second built-in reserved liquid capsule 12, and the docking gap between the first telescopic beam body 1 and the rubber reserved docking piece 5 is filled by the expanded second built-in reserved liquid capsule 12; the first reserved supply hose 11 cooperates with the second reserved supply hose 13 at the upper end to synchronously supply the inner side of the third built-in reserved liquid capsule 14, thereby pushing the external flexible pressure relief piece 15 at the upper end to bulge outward for support. In the process of the guiding docking movable part 7 and the resisting nested docking part 8 moving upward, they will simultaneously apply pressure to the first built-in reserved liquid capsule 9 on the inside, so that the first built-in reserved liquid capsule 9 can supply the inside of the second built-in reserved liquid capsule 12 through the first reserved supply hose 11, so that the second built-in reserved liquid capsule 12 can expand to fill the docking gap between the rubber reserved docking part 5 and the first telescopic beam body 1, and the interior thereof is sealed to avoid the influence of long-term infiltration of rainwater, etc., and the sound insulation state between the first telescopic beam body 1 and the second telescopic beam body 2 is controlled through the sealed structure to avoid Noise is prevented from being transmitted downward to form an echo, which assists in noise reduction processing; during the supply work of the first reserved supply hose 11, it will cooperate with the second reserved supply hose 13 at the upper end to perform synchronous supply work to the inner side of the third built-in reserved liquid capsule 14, thereby pushing the external flexible pressure relief piece 15 at the upper end to bulge outward for support, thereby allowing the upper end of the passing vehicles to be effectively supported for pressure relief during the movement, avoiding the vibration force of direct contact that reduces its service life, and at the same time, the passing vehicles can effectively perform shock-absorbing and pressure-relieving processing through the contact between the arc-shaped external flexible pressure relief piece 15 and the third built-in reserved liquid capsule 14.

[0021] Embodiment 3: Based on Embodiments 1 and 2, a construction method of a bridge expansion device is also disclosed, and the specific method steps are as follows: S1: The first telescopic beam body 1 and the second telescopic beam body 2 can be extended laterally through the rubber reserved docking piece 5 according to the supporting state of the bridge, and the outward-moving nested docking piece 3 will drive the guide docking movable piece 7 and the abutting nested docking piece 8 to move upward synchronously through the reserved steel wire rope 6, and then the lower end of the rubber reserved docking piece 5 is abutted against the support and anti-detachment treatment through the abutting nested docking piece 8; S2: During the upward movement of the guiding docking movable part 7 and the abutting nested docking part 8, they will simultaneously apply pressure to the first built-in reserved liquid capsule 9 inside, so that the first built-in reserved liquid capsule 9 can supply liquid to the inside of the second built-in reserved liquid capsule 12 through the first reserved supply hose 11, so that the second built-in reserved liquid capsule 12 can expand to fill the docking gap between the rubber reserved docking part 5 and the first telescopic beam body 1, and the inside thereof can be sealed to prevent the influence caused by long-term infiltration of rainwater, etc.; S3: The sound insulation state between the first telescopic beam body 1 and the second telescopic beam body 2 is controlled by the sealing structure in the auxiliary noise reduction structure to prevent the noise from being transmitted downward to form an echo, thereby assisting the noise reduction process; S4: During the supply operation of the first reserved supply hose 11, the second reserved supply hose 13 at the upper end performs synchronous supply operation to the inner side of the third built-in reserved liquid bag 14, thereby pushing the external flexible pressure relief part 15 at the upper end to bulge outward for support, thereby effectively performing pressure relief support operation on the upper end during the movement of passing vehicles.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge telescopic device, comprising a first telescopic beam body (1) and a second telescopic beam body (2), wherein the second telescopic beam body (2) is arranged outside the first telescopic beam body (1); Features: The lower ends of the first telescopic beam body (1) and the second telescopic beam body (2) are both fixedly connected with a nested docking piece (3), and the nested docking pieces (3) at the lower ends of the first telescopic beam body (1) and the second telescopic beam body (2) are staggered, the lower ends of the first telescopic beam body (1) and the second telescopic beam body (2) are provided with a transverse guide groove (4) on the inner sides, and the transverse guide groove (4) and the nested docking piece (3) are nested and docked, the first telescopic beam body (1) and the second telescopic beam body (2) are docked with a rubber reserved docking piece (5), and the inner sides of the first telescopic beam body (1) and the second telescopic beam body (2) are provided with an auxiliary positioning structure, and the supporting state of the rubber reserved docking piece (5) is adjusted by the auxiliary positioning structure; An auxiliary noise reduction structure is provided on the inner side of the upper ends of the first telescopic beam body (1) and the second telescopic beam body (2), and the bearing stability of the equipment is adjusted by the auxiliary noise reduction structure.

2. According to claim 1, a bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device is characterized in that: The auxiliary positioning structure is provided with a reserved steel wire rope (6), and the reserved steel wire rope (6) is butted with the outer side of the nested butt joint member (3), and the reserved steel wire rope (6) passes through the inner side of the first telescopic beam body (1), and a vertical reserved sliding groove (10) is provided on the inner side of the first telescopic beam body (1), and a guide butt joint movable member (7) is nested and installed on the outer side of the vertical reserved sliding groove (10), and the outer side of the guide butt joint movable member (7) is butt joint with the end of the reserved steel wire rope (6).

3. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 2 is characterized in that: The upper end of the guide docking movable part (7) is nested with a resisting nesting docking part (8), and the inner side of the resisting nesting docking part (8) is bonded with a first built-in reserved liquid capsule (9), and the positions of the first built-in reserved liquid capsule (9) and the guide docking movable part (7) correspond to each other.

4. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 3 is characterized in that: During the process of the first telescopic beam body (1) and the second telescopic beam body (2) extending and moving through the nested docking piece (3), the nested docking piece (3) drives the guide docking movable piece (7) and the abutting nested docking piece (8) to move upward synchronously via the reserved steel wire rope (6).

5. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 4 is characterized in that: During the upward movement of the guiding docking movable part (7) and the abutting nested docking part (8), pressure is applied to the first internal reserved liquid capsule (9) to prevent the lower end of the rubber reserved docking part (5) from coming off by the abutting nested docking part (8).

6. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 4 is characterized in that: The auxiliary noise reduction structure is provided with a first reserved supply hose (11), and the first reserved supply hose (11) is connected to a first built-in reserved liquid capsule (9), the first reserved supply hose (11) passes through the inner side of the first telescopic beam body (1), a second built-in reserved liquid capsule (12) is bonded to the inner side of the first telescopic beam body (1), and the second built-in reserved liquid capsule (12) is connected to the end of the first reserved supply hose (11).

7. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 6 is characterized by: The upper end of the first reserved supply hose (11) is butt-jointed with the second reserved supply hose (13), and the upper end of the second reserved supply hose (13) is butt-jointed with the third built-in reserved liquid bag (14), and the third built-in reserved liquid bag (14) is arranged at the upper end of the first telescopic beam body (1), and an external flexible pressure relief component (15) is bonded to the upper end of the first telescopic beam body (1).

8. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 7 is characterized in that: When the first built-in reserved liquid bag (9) is pressurized, the first reserved supply hose (11) supplies liquid to the inner side of the second built-in reserved liquid bag (12), and the expanded second built-in reserved liquid bag (12) fills the butt joint gap between the first telescopic beam body (1) and the rubber reserved butt joint piece (5); The first reserved supply hose (11) cooperates with the second reserved supply hose (13) at the upper end to synchronously supply liquid to the inner side of the third built-in reserved liquid bag (14), thereby pushing the external flexible pressure relief part (15) at the upper end to bulge outward for support.

9. The bolt-free, maintenance-free, shock-absorbing and noise-reducing bridge expansion device according to claim 8 is characterized in that: A construction method of a bridge expansion device is also disclosed, and the specific method steps are as follows: S1: The first telescopic beam body (1) and the second telescopic beam body (2) can be extended laterally through the rubber reserved docking piece (5) according to the supporting state of the bridge, and the outwardly moved nested docking piece (3) will drive the guide docking movable piece (7) and the abutting nested docking piece (8) to move upward synchronously through the reserved steel wire rope (6), and then the lower end of the rubber reserved docking piece (5) will be abutted against the support to prevent it from falling off through the abutting nested docking piece (8); S2: During the upward movement of the guiding docking movable member (7) and the abutting nested docking member (8), they will simultaneously apply pressure to the first built-in reserved liquid capsule (9) on the inside, thereby allowing the first built-in reserved liquid capsule (9) to supply liquid to the inside of the second built-in reserved liquid capsule (12) through the first reserved supply hose (11), allowing the second built-in reserved liquid capsule (12) to expand and fill the docking gap between the rubber reserved docking member (5) and the first telescopic beam body (1), thereby sealing the inside thereof to prevent the influence caused by long-term infiltration of rainwater, etc.; S3: controlling the sound insulation state between the first telescopic beam body (1) and the second telescopic beam body (2) through the sealing structure in the auxiliary noise reduction structure, thereby preventing noise from being transmitted downward to form an echo, and assisting in the noise reduction process; S4: During the supply operation of the first reserved supply hose (11), the second reserved supply hose (13) at the upper end performs a synchronous supply operation toward the inner side of the third built-in reserved liquid bag (14), thereby pushing the external flexible pressure relief member (15) at the upper end to bulge outward for support, thereby effectively performing pressure relief support operation on the upper end of the passing vehicle during its movement.

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