Modular integrally assembled telescopic device and construction method thereof

Abstract

The present invention relates to a modular integrally assembled telescopic device and a construction method thereof, wherein a reinforcing rib is provided at the lower portion of a movable tooth plate, a waterstop is provided at the lower portion of the reinforcing rib, and the waterstop is connected via a waterstop embedded part and a waterstop connecting nut provided at the end of the beam body; the bottom surfaces of the front fixed tooth plate and the rear fixed tooth plate are fixedly connected to the top surface of a support box, and a multi-directional displacement system is provided in the support box; the movable tooth plate and the reinforcing rib are fixed to a supporting beam perpendicular to the movable tooth plate via connecting bolts, and both ends of the supporting beam are inserted into the support box and slidably connected to the multi-directional displacement system; a displacement spring is provided in the support box, and the displacement spring is connected to a sealing plate on the open side of the supporting beam via a connecting nut. The present invention is assembled in a factory, and concrete pouring is completed. Only grouting is performed at the installation construction site, and there is no concrete pouring link, which greatly improves construction efficiency and saves construction period.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a modular integrally assembled telescopic device and a construction method thereof. Background Art

[0002] Modern developed cities are developing rapidly, and land resources are scarce. More and more tiered transportation lines are being constructed, renovated, or expanded, facing complex environments, large bridges, and a high demand for expansion joints. At the same time, an increasing number of bridges are adopting pier-beam consolidation structures, saving on bearing costs and subsequent maintenance expenses. When a single-span bridge is 15m wide or wider, vehicle loads cause significant vertical displacement of the beam, necessitating high displacement performance at the connecting ends, with the required vertical displacement reaching as high as 2cm or more. Heavy traffic on tiered lines demands high service life and durability for expansion joints. As replaceable components, expansion joints must be installed and maintained without interrupting traffic. Urban arterial lines also face high noise and environmental requirements. Furthermore, environmental considerations for expansion joint construction require minimal waste generation during installation to improve the overall environmental performance of the device.

[0003] At present, most of the existing comb-plate expansion devices of bridges use rotating shafts, rubber pads, ball seats, etc. to achieve the needs of digital displacement. However, the range of its displacement change is small. For more and more special needs, such as large vertical displacement, multi-directional displacement, rapid construction, environmental protection and noise reduction, the existing bridge expansion devices cannot meet the requirements of ultra-large vertical displacement or even more than 2 cm. Displacement beyond the rated displacement range of the expansion device affects the normal operation of the bridge expansion device and reduces the service life of the bridge expansion device.

[0004] Bridge expansion joints consist of multiple components with different functions. Improper installation precision control can impact the overall operation of the bridge structure and pose safety risks. Proper installation procedures and precision control can enhance the overall functionality of the bridge, improving its durability and significantly reducing subsequent maintenance costs. Existing comb-tooth expansion joints are complex to construct, with components essentially assembled on-site, resulting in long construction cycles, low efficiency, and difficulty maintaining precision. This can lead to premature failure of the expansion joint after installation, reducing its efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a modular integrally assembled telescopic device and a construction method thereof, which adopts a modular design, has multi-directional displacement and waterproof capabilities, can adapt to large vertical displacements of more than 20 mm, and improve driving comfort; through the overall modular assembly design of the structure, overall assembly in the factory, overall lifting of a single module at the construction site, one-time leveling and positioning, and grouting to complete the connection, there is no need for a construction process of pouring concrete at the installation construction site, which greatly reduces the construction period of the telescopic device in the final project.

[0006] The technical solution adopted in the present invention is:

[0007] A modular integrally assembled telescopic device comprises a movable tooth plate and a front fixed tooth plate and a rear fixed tooth plate symmetrically arranged on either side thereof, wherein the comb teeth on either side of the movable tooth plate respectively engage with the comb teeth of the front fixed tooth plate and the rear fixed tooth plate, and is characterized in that:

[0008] A reinforcing rib is provided at the lower part of the movable tooth plate, a waterstop is provided at the lower part of the reinforcing rib, and the waterstop is connected to the waterstop embedded part and the waterstop connecting nut provided at the end of the beam body;

[0009] The bottom surfaces of the front fixed tooth plate and the rear fixed tooth plate are fixedly connected to the top surface of the support box, and a multi-directional displacement system is provided in the support box;

[0010] The movable tooth plate and the reinforcing rib are fixed to the supporting beam perpendicular to the movable tooth plate through connecting bolts. Both ends of the supporting beam are inserted into the support box and are slidably connected to the multi-directional displacement system.

[0011] A displacement spring is arranged in the support box, and the displacement spring is connected to the sealing plate on the opening side of the supporting beam through a connecting nut.

[0012] The bottom surfaces of the front fixed tooth plate and the rear fixed tooth plate are fixedly connected with an anchor connection assembly, which includes an anchor bar and an anchor plate. The front fixed tooth plate and the bottom surfaces of the rear fixed tooth plate are welded and fixed to the anchor plate by welding;

[0013] Cast the factory-cast module at the position of the anchor component. Before casting the factory-cast module, set the preset hole forming parts on the template. After the casting is completed, the preset hole of the factory-cast module is formed, so that the center line of the preset hole of the factory-cast module intersects vertically with the center line of the horizontal section of the anchor bar on the anchor component.

[0014] The beam body is provided with an upward extending expansion device embedded part, the anchor bar of the expansion device is connected to the expansion device embedded part by a hook method, and the factory casting module and the beam body are fixed into a whole by grouting into the preset hole of the factory casting module.

[0015] The supporting crossbeam is provided with a connecting rib plate, which is provided with screw holes. The movable tooth plate and the reinforcing rib plate are connected to the connecting rib plate of the supporting crossbeam through connecting bolts.

[0016] The multi-directional displacement system is a ball seat structure, a basin seat structure or a laminated rubber structure.

[0017] The cross-section of the waterstop is U-shaped, semicircular or wavy; a gap is left between the front and rear ends of the beam below the movable tooth plate, and the two ends of the waterstop are fixed to the waterstop embedded parts of the beam through waterstop connecting nuts.

[0018] During construction, the beam body was pre-buried with embedded parts for expansion joints and waterstops. The upper part of the expansion joint embedded part is in the shape of an oblique hook, and the lower part is in the shape of an L-hook. The L-hook side crosses the embedded steel bars to strengthen the connection.

[0019] The embedded parts of the waterstop are threaded screws.

[0020] The waterstop is equipped with telescopic drainage pipes on both sides close to the guardrail.

[0021] The construction method of the modular integrally assembled telescopic device is characterized by:

[0022] The following steps are involved:

[0023] Step 1: Cutting the notch:

[0024] Set up a telescopic device to install the process cover plate, whose side is a warped edge or U-shaped structure. When paving, overlap the process cover plate on both sides of the beam body, and cut the notch after paving is completed;

[0025] Step 2: Install the waterstop:

[0026] Install the waterstop onto the embedded waterstop parts on the beam;

[0027] Step 3: Hoisting, positioning, grouting, and installation completion:

[0028] Hoist the entire telescopic device module assembled in the factory (i.e. the telescopic device module and the factory-cast module) into the installation slot, align the embedded parts of the telescopic device on the beam body into the preset holes of the factory-cast module, adjust the position and elevation, and grout to complete the installation.

[0029] The telescopic device is assembled in the factory, and the casting of the modules is also completed in the factory.

[0030] The present invention has the following advantages:

[0031] 1. Multi-directional displacement structure

[0032] (1) Accurately design the shape and size of the comb teeth and set up a vertical anti-warping tooth structure to prevent the tooth ends from warping, avoid tire blowouts, and improve driving safety.

[0033] (2) Design a new rotation system to separate the functions of beam rotation and smooth extension and retraction of the telescopic device, thus truly realizing the multi-directional rotation function.

[0034] 2. Environmental protection and noise reduction

[0035] (1) Add elastic EVA and polyurethane springs and set damping buffer elements at the anchor bolt connection. On the one hand, this increases the multi-directional displacement capability of the device, and on the other hand, it improves driving comfort and driving feel, reduces the vibration and noise generated by the vehicle and device, and protects the environment.

[0036] (2) Introducing rubber bearings into supporting components changes the rigid contact between traditional steel parts and concrete, thus achieving vertical and horizontal elastic shock absorption functions;

[0037] (3) Optimize and improve the width and spacing of the comb plates to improve driving stability and comfort.

[0038] 3. Rapid construction technology

[0039] Through the overall modular assembly design of the structure, overall assembly in the factory, overall lifting of individual modules on the construction site, one-time leveling and positioning, and grouting to complete the connection, there is no need to pour concrete at the installation construction site. This construction process greatly reduces the construction period of the telescopic device in the final project, and the traffic can be opened simultaneously during the assembly construction process, which greatly shortens the construction time, saves resources and protects the environment.

[0040] 4. Waterproofing and drainage

[0041] (1) Newly developed high-strength and fatigue-resistant rubber material to make waterstop;

[0042] (2) Specially design the waterstop structure and use curtain reinforcement;

[0043] (3) The water entering the waterstop is guided into the drainage pipe of the beam through the water pipe installed on the side of the beam close to the guardrail.

[0044] 5. Durability

[0045] (1) The overall solution adopts a modular design. Taking a 1.5m long module as an example, only 8 connecting bolts are set, which greatly reduces the number of wearing parts and reduces the probability of local damage to the concrete;

[0046] (2) The fixed tooth plate is cast into one piece with the beam body, which reduces the probability of damage to the tooth plates at both ends;

[0047] (3) Beam and expansion joint: Special ultra-high performance concrete is used instead of traditional ordinary concrete;

[0048] (4) New materials: We plan to independently develop new high-strength and fatigue-resistant rubber material formulas to replace ordinary rubber materials.

[0049] (5) Develop test designs for the new telescopic device's rotation angle, large vertical displacement, displacement along the bridge direction, transverse bridge direction, friction resistance, and noise to ensure stable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a planar structural diagram of the telescopic device of the present invention;

[0051] Figure 2 It is the side elevation of the integral support box after the present invention is assembled in the factory and poured in the factory;

[0052] Figure 3 This is a side elevation view of the support box after installation of the present invention is completed;

[0053] Figure 4 This is a side elevation view of the middle of a single module after installation of the present invention;

[0054] Figure 5 It is a structural diagram of the supporting beam of the present invention;

[0055] Figure 6 It is the ball seat structure of the present invention;

[0056] Figure 7 It is the basin seat structure of the present invention;

[0057] Figure 8 It is the laminated rubber structure of the present invention;

[0058] Figure 9 It is the embedded part structure of the telescopic device of the present invention;

[0059] Figure 10 is a structural diagram of the anchor assembly of the present invention;

[0060] Figure 11 It is the cross-sectional structure of the process cover plate of the present invention;

[0061] Figure 12 It is an overall axonometric view of the present invention;

[0062] Figure 13 This is a schematic diagram of the maximum vertical displacement of the D160 telescopic device in the present invention when it is compressed to the minimum;

[0063] Figure 14 This is a schematic diagram of the maximum vertical displacement of the D160 telescopic device in the intermediate state of the present invention;

[0064] Figure 15 This is a schematic diagram of the maximum vertical displacement when the D160 telescopic device is stretched to the maximum state according to the present invention.

[0065] In the figure: 1-front fixed tooth plate; 2-movable tooth plate; 3-rear fixed tooth plate; 4-anchor assembly; 4-1-anchor bar; 4-2-anchor plate; 5-displacement spring; 6-support box; 7-multi-directional displacement system; 7-1-ball seat structure, 7-2-basin seat structure, 7-3-laminated rubber structure; 8-supporting beam; 9-waterstop; 10-reinforcement rib; 11-connecting bolt; 12-connecting rib; 13-waterstop connecting nut; 14-in-plant casting module; 14-1-preset hole of in-plant casting module; 15-beam body; 15-1-embedded parts of expansion joint; 15-2-embedded parts of waterstop; 16-exposure device drainage pipe; 17-exposure device installation process cover. DETAILED DESCRIPTION

[0066] The present invention will be described in detail below with reference to specific embodiments.

[0067] The present invention relates to a modular integrally assembled telescopic device and a construction method thereof, wherein the telescopic device comprises a movable tooth plate 2 and a front fixed tooth plate 1 and a rear fixed tooth plate 3 symmetrically arranged on both sides thereof, wherein the comb teeth on both sides of the movable tooth plate 2 respectively engage with the comb teeth of the front fixed tooth plate 1 and the rear fixed tooth plate 3. The bottom surfaces of the front fixed tooth plate 1 and the rear fixed tooth plate 3 are fixedly connected to the top surface of a support box 6, and a multi-directional displacement system 7 is provided in the support box 6; a supporting crossbeam 8 perpendicular to the movable tooth plate 2 is fixed to the bottom surface of the movable tooth plate 2 by connecting bolts 11, and both ends of the supporting crossbeam 8 are inserted into the support box 6 and are slidably connected to the multi-directional displacement system 7; a displacement spring 5 is provided in the support box 6, and the displacement spring 5 is connected to the side sealing plate of the support beam opening of the support box through a connecting nut, so as to achieve the purpose of uniform displacement of the two seams;

[0068] The bottom surfaces of the front fixed tooth plate 1 and the rear fixed tooth plate 3 are fixedly connected with the anchoring assembly 4. In the factory, the anchoring assembly 4, the support box 6, the front fixed tooth plate 1 and the rear fixed tooth plate 3 are integrally cast into one body.

[0069] The supporting crossbeam 8 is provided with a connecting rib 12 , on which screw holes are provided. The movable tooth plate 2 and the reinforcing rib 10 are connected to the connecting rib 12 of the supporting crossbeam 8 by connecting bolts 11 .

[0070] A gap is left between the front and rear end beams below the movable tooth plate 2, and a waterstop 9 with a U-shaped cross section is provided at the gap position. Both ends of the waterstop 9 are fixed to the surface of the beam by bolts.

[0071] With reference to the accompanying drawings, the present invention is further described below:

[0072] The length of a single module of the present invention is 1.5m, and the actual length can also be customized according to engineering requirements. The front fixed tooth plate 1 and the rear fixed tooth plate 3 erected on the beam body are provided with an anchoring assembly 4 on the bottom surface, and are fixedly connected to the top of the support box 6, and are cast and fixed to the beam body as a whole; the movable tooth plate 2 is connected to the supporting beam 8 by a connecting bolt 11; a reinforcing rib 10 is provided under the movable tooth plate 2 for reinforcement to ensure overall strength; the front fixed tooth plate 1, the movable tooth plate 2, and the rear fixed tooth plate 3 are designed with end structures, such as chamfers and arc structures, to prevent vertical tooth warping and jamming.

[0073] The multi-directional displacement system 7 can be, but is not limited to, a spherical, elastic, or basin-type displacement system, enabling large vertical and multi-directional displacement. Currently available, mature products are used. Sliding surfaces are provided at both ends of the supporting crossbeam 8 to accommodate horizontal telescopic displacement of the beam. The rotational and telescopic mechanisms are separated for smooth extension and retraction, achieving true multi-directional rotation. Damage can be quickly replaced without interrupting traffic. A displacement spring 5 is provided within the support box 6 to ensure uniform telescopic displacement.

[0074] The number of connecting bolts 11 of the modular telescopic device of the present invention is greatly reduced, with only 8 or even less for each module, which greatly reduces the number of wearing parts and improves the overall durability of the telescopic device; a connecting rib 12 is provided on the supporting beam 8 to connect the movable tooth plate 2 to the supporting beam 8, and a noise-reducing elastic buffer pad can be provided on the two contact surfaces to prevent steel from generating impact noise on steel. The buffer pad material can be polyurethane, rubber and other materials.

[0075] The waterstop 9 is fixed to the beam 15 waterstop embedded part 15-2 through the waterstop connecting nut 13, and the waterstop 9 expands and contracts with the beam; a telescopic device drain pipe 16 is set at the end of the waterstop 9 close to the guardrails on both sides to drain water into the beam drainage pipe to prevent water from seeping into the beam.

[0076] The comb teeth of the front fixed tooth plate 1, the movable tooth plate 2, and the rear fixed tooth plate 3 are specially designed in shape and size. The shapes of the teeth can be rectangular, tooth-shaped, triangular, etc. At the same time, vertical anti-warping tooth structures are set, such as chamfer design and boss design, to ensure that the tooth ends do not warp up, avoid tire blowouts, and improve driving safety.

[0077] The present invention improves the rigid contact between components by adding elastic EVA and polyurethane springs. A noise-reducing elastic cushion is installed at the connecting bolt 11 to prevent steel-on-steel impact noise. The cushion can be made of polyurethane, rubber, or other materials. Furthermore, by optimizing the width and spacing of the comb teeth of the front fixed tooth plate 1, the movable tooth plate 2, and the rear fixed tooth plate 3, driving comfort is improved, vibration and noise generated by the vehicle and the device are reduced, and environmental protection is protected.

[0078] Through the modular design of the overall structure, individual parts are processed in the factory, assembled and cast as a whole in the factory, and then transported to the construction site. At the construction site, the individual modules are hoisted as a whole, leveled and fixed in position at one time, and the installation is completed by grouting. This construction process does not require on-site concrete pouring, saves formwork and maintenance time, reduces the construction period of the telescopic device in the final project, improves construction efficiency, and realizes the characteristic of simultaneous opening of traffic during the assembly construction process, greatly shortens construction time, saves resources, and protects the environment.

[0079] The waterstop 9 is made of a high-strength rubber material with good fatigue resistance; the structure of the waterstop 9 is specially designed, and is reinforced with but not limited to curtain cloth, fiber cloth, fiber, etc., and vulcanized to form an integrated structure.

[0080] The water stop 9 uses a rubber material with high strength and excellent fatigue resistance instead of ordinary rubber material.

[0081] The present invention comprises the following installation construction steps:

[0082] The following steps are involved:

[0083] Step 1: Cutting the notch:

[0084] A telescopic device is provided to install the process cover plate 17, whose side has a blunt angle warped edge, a U-shaped structure, etc. When paving, the process cover plate 17 is overlapped on both sides of the beam body 15, and a notch is cut after paving is completed.

[0085] Step 2: Install the waterstop:

[0086] The waterstop 9 is installed on the waterstop embedded part 15 - 2 provided on the beam body 15 .

[0087] Step 3: Overall hoisting positioning, grouting, and installation completion:

[0088] The telescopic device module assembled in the factory, i.e. the telescopic device module and the factory-cast module 14, are hoisted into the installation slot, and the telescopic device embedded parts 15-1 set on the beam body 15 are respectively inserted into the preset holes 14-1 of the factory-cast module. The position and elevation are adjusted, and grouting is performed to complete the installation.

[0089] The content of the present invention is not limited to the embodiments listed. Any equivalent transformation of the technical solution of the present invention made by ordinary technicians in this field after reading the description of the present invention is covered by the claims of the present invention.

Claims

1. A modular integrally assembled telescopic device, comprising a movable tooth plate (2) and a front fixed tooth plate (1) and a rear fixed tooth plate (3) symmetrically arranged on both sides thereof, wherein the comb teeth on both sides of the movable tooth plate (2) respectively engage with the comb teeth of the front fixed tooth plate (1) and the rear fixed tooth plate (3), and is characterized in that: A reinforcing rib (10) is provided at the lower portion of the movable tooth plate (2), a waterstop (9) is provided at the lower portion of the reinforcing rib (10), and the waterstop (9) is connected to the end portion of the beam body (15) via a waterstop embedded part (15-2) and a waterstop connecting nut (13); The bottom surfaces of the front fixed tooth plate (1) and the rear fixed tooth plate (3) are fixedly connected to the top surface of the support box (6), and a multi-directional displacement system (7) is provided in the support box (6); The movable tooth plate (2) and the reinforcing rib plate (10) are fixed to a supporting beam (8) perpendicular to the movable tooth plate (2) through connecting bolts (11), and both ends of the supporting beam (8) are inserted into the support box (6) and are slidably connected to the multi-directional displacement system (7); A displacement spring (5) is provided in the support box (6), and the displacement spring (5) is connected to the sealing plate on the opening side of the support beam (8) through a connecting nut; The bottom surfaces of the front fixed tooth plate (1) and the rear fixed tooth plate (3) are fixedly connected with an anchor assembly (4), and the anchor assembly (4) includes an anchor bar (4-1) and an anchor plate (4-2). The bottom surfaces of the front fixed tooth plate (1) and the rear fixed tooth plate (3) are welded and fixed to the anchor plate (4-2). Casting the factory-cast module (14) at the position of the anchoring assembly (4), setting a preset hole forming component on the template before casting the factory-cast module (14), forming a factory-cast module preset hole (14-1) after casting, so that the center line of the factory-cast module preset hole (14-1) is perpendicularly intersected with the center line of the horizontal section of the anchor bar (4-1) on the anchoring assembly (4); An upwardly extending telescopic device embedded part (15-1) is provided on the beam body (15); the anchor bar (4-1) of the telescopic device is connected to the telescopic device embedded part (15-1) by a hooking method; and the in-plant casting module (14) and the beam body (15) are fixed into a whole by grouting the preset hole (14-1) of the in-plant casting module; The multi-directional displacement system (7) is a ball seat structure (7-1), a basin seat structure (7-2) or a laminated rubber structure (7-3); The cross section of the water stop (9) is U-shaped, semicircular or wavy; a gap is left between the front and rear ends of the beam (15) below the movable tooth plate (2), and the two ends of the water stop (9) are fixed to the water stop embedded parts (15-2) of the beam (15) through the water stop connecting nuts (13); The beam body (15) is pre-buried with expansion device embedded parts (15-1) and water stop embedded parts (15-2) during construction; the expansion device embedded part (15-1) has an upper portion with an oblique hook shape and a lower portion with an L-hook shape, and the L-hook side crosses the embedded steel bar for enhanced connection; The embedded part (15-2) of the waterstop is a screw with threads; A noise reduction elastic buffer pad is provided at the connecting bolt (11).

2. The modular integrally assembled telescopic device according to claim 1, characterized in that: A connecting rib (12) is provided on the supporting crossbeam (8), on which screw holes are provided, and the movable tooth plate (2) and the reinforcing rib (10) are connected to the connecting rib (12) of the supporting crossbeam (8) through connecting bolts (11).

3. The modular integrally assembled telescopic device according to claim 1 or 2, characterized in that: The water stop (9) is provided with telescopic device drainage pipes (16) on both sides close to the guardrail.

4. The construction method of the modular integrally assembled telescopic device according to claim 1, characterized in that: The following steps are involved: Step 1: Cutting the notch: A telescopic device is provided to install a process cover plate (17), the side of which is a warped edge or U-shaped structure. When paving, the process cover plate (17) is overlapped on both sides of the beam body (15), and a notch is cut after paving is completed; Step 2: Install the waterstop: Installing the waterstop (9) onto the waterstop embedded part (15-2) provided on the beam body (15); Step 3: Hoisting, positioning, grouting and installation completion: The entire telescopic device module assembled in the factory, i.e., the telescopic device module and the factory-cast module (14), is hoisted into the installation slot, and the telescopic device embedded parts (15-1) provided on the beam body (15) are respectively inserted into the preset holes (14-1) of the factory-cast module, and the position and elevation are adjusted, and grouting is performed to complete the installation; The telescopic device is assembled in the factory, and the casting of the casting module (14) is completed in the factory.

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