Bearing type steel plate expansion joint device and construction method thereof

Abstract

The invention discloses a bearing type steel plate expansion joint device which comprises a galvanized steel base placed on the side wall of a preformed groove preset in concrete. The galvanized steel base is fixed to the installation notches in the two sides of the expansion joint through the plastic expansion anchor bolts and the water stop belts. The steel cover plate is erected on the galvanized steel base on the two sides of the expansion joint; the steel cover plate is reversely buckled to the bottom of the galvanized steel base through the M6 stainless steel center lead screw and the sliding rod piece. According to the expansion joint device, the galvanized steel base, the steel cover plate, the stainless steel center lead screw, the sliding rod piece, the rubber gasket, the rubber water stop belt and the like are adopted to form the expansion joint device, the construction and waterproof effects can be effectively improved, the engineering cost is reduced, and good economic benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the field of expansion joints for buildings, and in particular to a load-bearing steel plate expansion joint device and a construction method thereof. Background Art

[0002] Expansion joints are a general term for expansion joints, settlement joints, and seismic joints. Buildings often deform under the influence of external factors, leading to cracking and even damage. Expansion joints are structural joints reserved for such situations.

[0003] Expansion joints, typically installed between pre-existing expansion joints in bridge pavements, are a crucial component of bridge construction. Their primary function is not only to accommodate the expansion and contraction requirements of bridges but also to provide a smooth transition between bridges. Currently, many industrial plant projects for logistics and warehousing feature a dual-story design. The ramps and driveways connecting the two warehouse floors are bridge-like structures. To accommodate the longitudinal deformation of the bridge deck due to thermal expansion and contraction, these ramps and driveways are designed with 100mm or 200mm wide expansion joints at regular intervals. These expansion joints are similar in structure to those found in bridge pavements. Therefore, the quality of the expansion joint device and its installation directly impacts the waterproofing, service life, driving safety, comfort, and noise levels of the ramps and driveways.

[0004] The existing technology often uses comb-type steel plate expansion joint devices such as Figure 1 As shown, or modular expansion joint device as shown Figure 2 As shown, this type of expansion joint device is commonly used in municipal highway bridge construction and has excellent performance. However, this type of device is complex to produce, expensive, and highly professional. The initial installation and subsequent maintenance require a professional team, and the construction and maintenance costs are relatively high.

[0005] Existing comb-type steel plate expansion joints are complex structures, consisting of comb-type plates, connectors, and anchoring systems. All components are fabricated and assembled from steel, resulting in high structural strength. However, the steel plates used are thick, and the steel-supported expansion joints have wide gaps, which easily accumulate debris and are difficult to remove, thereby inhibiting the expansion and contraction function of the expansion joints. The bolts and stainless steel backing plates require frequent and challenging daily maintenance, resulting in high overall construction and maintenance costs. Due to the large expansion and contraction range of these expansion joints, the waterproofing and drainage systems are complex, and the drainage function is imperfect, making them prone to leakage.

[0006] Existing modular expansion joints are complex in structure. Multi-joint modular expansion joints consist of various components, including special-shaped steel longitudinal beams, steel crossbeams, control and transmission mechanisms, displacement boxes, and rubber sealing strips. The manufacturing and installation process is time-consuming, labor-intensive, and costly. Exposed joints can cause severe vibration when heavy vehicles pass through them, and residual residue within the joints is not promptly cleaned, leading to the rubber sealing strips becoming easily detached and aging. Steel beams and elastic support components are also easily damaged, resulting in a short service life and labor-intensive repairs, resulting in a high overall cost.

[0007] The second-floor driving passage of conventional logistics plant projects is only used for low-speed freight traffic and is less susceptible to the impact of high-speed vehicles. The structures on both sides of the expansion joint of the driving passage are at the same elevation and plane, and the force across the joint is relatively uniform. For such working conditions, it is a problem worthy of study to provide a simple, reliable and durable load-bearing steel plate expansion joint device and form a complete set of construction methods. Summary of the Invention

[0008] In order to solve the shortcomings of the above-mentioned prior art, the present invention provides an expansion joint device formed by a galvanized steel base, a steel cover plate, a stainless steel center screw and sliding rod, a rubber gasket and a rubber water stop, which can effectively improve the construction and waterproofing effects, reduce project costs, and have good economic benefits.

[0009] The object of the present invention is achieved like this: A load-bearing steel plate expansion joint device includes a galvanized steel base 3 placed on the side of a preset reserved groove in concrete 1; the galvanized steel base 3 is fixed to the installation notches on both sides of the expansion joint through plastic expansion anchors 10 and waterstops 4; steel cover plates 5 are mounted on the galvanized steel base 3 on both sides of the expansion joint; the steel cover plates 5 are buckled to the bottom of the galvanized steel base 3 through an M6 stainless steel center screw and a sliding rod 2.

[0010] A rubber gasket 6 is usually laid between the steel cover plate 5 and the galvanized steel base 3; at the same time, a rubber water stop 10 arranged above the expansion joint and on the notches on both sides is fixed under the rubber gasket 6 by gravity pressure; The gaps between the steel cover plate 5 and the galvanized steel base 3, and between the galvanized steel base 3 and the edge of the notch are tightly sealed with elastic polyurethane sealant 7; A stainless steel drainage trough 8 is provided at the lower part of the expansion joint, and a joint 9 for accessing the rainwater pipe is provided at the lower end of the drainage trough 8; The specific construction method of the load-bearing steel plate expansion joint device comprises the following steps: Step 1: Install the rubber waterstop and base; Step 2: Install rubber gaskets, sliding rods and cross-seam steel plates; Step 3: Check, correct and caulking; Step 4: Install the stainless steel gutter.

[0011] The specific operation of the rubber waterstop and base installation in step 1 is: after the reserved concrete groove is maintained and trimmed, the rubber waterstop is laid and temporarily fixed, and then the positioning line is pulled to install the 4mm thick galvanized steel base. The base uses M8 plastic expansion anchors with a staggered spacing of 300mm.

[0012] The specific operation of installing the rubber gasket, sliding rod and cross-seam steel plate in step 2 is: after the base is installed in place, the rubber gasket is laid on it, the stainless steel sliding rod is buckled on the bottom of the base according to the positioning, and after laying the steel plate, the M8 center screw is used to firmly connect it to the sliding rod.

[0013] The specific operating steps of the step three of checking, correcting and caulking are as follows: after the installation of the steel plate expansion joint device is completed, the position and elevation are corrected and checked; gravel, dust and other garbage in the gaps around the cover are cleaned with a blower and a broom, and the gaps between the steel cover and the base, and between the base and the groove edge are sealed tightly with elastic polyurethane sealant.

[0014] The specific operation of installing the stainless steel drainage trough in step 4 is: fix the stainless steel drainage trough at the bottom of the expansion joint, collect and discharge excess rainwater from the upper part, and connect it to the end rainwater pipe to ensure that the lower part of the driving channel is not eroded by rainwater, thereby improving the waterproof effect.

[0015] Positive beneficial effects: The present invention discloses a load-bearing steel plate expansion joint device and a construction method thereof, which have excellent advantages compared with existing comb-type steel plate expansion joint devices or modular expansion joint devices: The load-bearing steel plate expansion joint device has a simple structure and consists of a 4mm thick galvanized steel base, a 20mm thick Q235B steel cover plate, an M6 stainless steel center screw and slide bar, a 2mm thick rubber gasket, a rubber waterstop, and a stainless steel drainage channel. The overall cost of the steel plate material used is low, and the economic benefits are good. After the construction of the load-bearing steel plate expansion joint device is completed, there is no large seam width on the surface, and it is not easy to accumulate debris during daily use. The cost of routine maintenance and subsequent repairs is low; The construction process of the heavy-duty steel plate expansion joint device is simple. After the construction is completed, it is flush with the surface layer and the construction molding quality is good. The vehicle runs smoothly without jumping and the driving noise is low. The load-bearing steel plate expansion joint device adopts a waterproof measure that combines the rubber waterstop inside the expansion joint and the stainless steel water trough at the bottom of the expansion joint. Two waterproof lines are set to prevent rainwater from leaking to the lower part of the driving channel, which can effectively improve the waterproof effect of the road surface construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a rendering of a comb-shaped steel plate expansion joint device in the prior art; Figure 2 This is a rendering of a modular expansion joint device in the prior art; Figure 3 This is a schematic structural diagram of a load-bearing steel plate expansion joint device according to the present invention; Figure 4 This is a schematic diagram of the location of the expansion joint of a specific embodiment of the present invention; Figure 5 A schematic diagram of chiseling and cleaning concrete in the anchoring area according to a specific embodiment of the present invention; Figure 6 A schematic diagram of the construction of anchorage area reinforcement and hanging formwork according to a specific embodiment of the present invention; Figure 7 This is a diagram showing the concrete pouring and finishing effects of the notch in a specific embodiment of the present invention; Figure 8 This is a rendering of the installation effect of the water stop and base of a specific embodiment of the present invention; Figure 9 This is a diagram showing the installation effect of the rubber gasket, sliding rod and steel cover plate of a specific embodiment of the present invention; Figure 10 This is a diagram showing the effect of the elastic polyurethane sealant caulking operation according to a specific embodiment of the present invention; Figure 11 This is a rendering of the installation of a stainless steel drain trough according to a specific embodiment of the present invention; The figure shows: concrete 1, M6 stainless steel center screw and sliding rod 2, base 3, waterstop 4, steel cover 5, rubber gasket 6, polyurethane sealant 7, drainage trough 8, joint 9, rubber waterstop 10. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1 As shown, a load-bearing steel plate expansion joint device includes a galvanized steel base 3 placed on the side of a preset reserved groove in concrete 1; the galvanized steel base 3 is fixed to the installation notches on both sides of the expansion joint through plastic expansion anchors 10 and waterstops 4; steel cover plates 5 are mounted on the galvanized steel base 3 on both sides of the expansion joint; the steel cover plates 5 are buckled to the bottom of the galvanized steel base 3 through an M6 stainless steel center screw and a sliding rod 2.

[0018] A rubber gasket 6 is usually laid between the steel cover plate 5 and the galvanized steel base 3; at the same time, a rubber water stop 10 arranged above the expansion joint and on the notches on both sides is fixed under the rubber gasket 6 by gravity pressure; The gaps between the steel cover plate 5 and the galvanized steel base 3, and between the galvanized steel base 3 and the edge of the notch are tightly sealed with elastic polyurethane sealant 7; A stainless steel drainage trough 8 is provided at the lower part of the expansion joint, and a joint 9 for accessing the rainwater pipe is provided at the lower end of the drainage trough 8; The thick galvanized steel base 1 is 4mm thick, the steel cover is 20mm thick Q235B steel plate, M6 stainless steel center screw and sliding rod, thick rubber gasket is 2mm thick, and rubber waterstop 10. The waterstop and the base are fixed to the installation slots on both sides of the expansion joint with M8 plastic expansion anchors. The steel cover is mounted on the base, and rubber gaskets are laid along the entire bottom to act as a shock absorber. The steel cover is buckled to the bottom of the base through stainless steel sliding rods to ensure that the steel cover is always in the center of the expansion joint when the structure expands and contracts. The gaps between the steel cover and the base, and between the base and the edge of the slot are tightly sealed with elastic polyurethane sealant. The lower part of the expansion joint is fixed with a stainless steel gutter to catch and discharge excess rainwater from the upper part, thereby improving the waterproof effect. The specific construction method of the load-bearing steel plate expansion joint device comprises the following steps: Step 1: Install the rubber waterstop and base; Step 2: Install rubber gaskets, sliding rods and cross-seam steel plates; Step 3: Check, correct and caulking; Step 4: Install the stainless steel gutter.

[0019] The specific operation of the rubber waterstop and base installation in step 1 is: after the reserved concrete groove is maintained and trimmed, the rubber waterstop is laid and temporarily fixed, and then the positioning line is pulled to install the 4mm thick galvanized steel base. The base uses M8 plastic expansion anchors with a staggered spacing of 300mm.

[0020] The specific operation of installing the rubber gasket, sliding rod and cross-seam steel plate in step 2 is: after the base is installed in place, the rubber gasket is laid on it, the stainless steel sliding rod is buckled on the bottom of the base according to the positioning, and after laying the steel plate, the M8 center screw is used to firmly connect it to the sliding rod.

[0021] The specific operating steps of the step three of checking, correcting and caulking are as follows: after the installation of the steel plate expansion joint device is completed, the position and elevation are corrected and checked; gravel, dust and other garbage in the gaps around the cover are cleaned with a blower and a broom, and the gaps between the steel cover and the base, and between the base and the groove edge are sealed tightly with elastic polyurethane sealant.

[0022] The specific operation of installing the stainless steel drainage trough in step 4 is: fix the stainless steel drainage trough at the bottom of the expansion joint, collect and discharge excess rainwater from the upper part, and connect it to the end rainwater pipe to ensure that the lower part of the driving channel is not eroded by rainwater, thereby improving the waterproof effect.

[0023] Example: 1.1 A certain project is a logistics and warehousing industrial plant project, mainly consisting of Warehouse 1#, Warehouse 2#, Warehouse 3#, a driveway and ramp, a fire pump station, and a substation. The warehouse is a two-story reinforced concrete frame structure with a long-span light steel roof structure.

[0024] 1.2 Expansion joint working conditions The main part of this project consists of three two-story warehouses and a ramp and a driveway connecting the first and second floors. The ramp and the driveway are bridge-type structures. In order to meet the needs of longitudinal deformation due to thermal expansion and contraction of the bridge deck, the ramp and the driveway are designed with 100mm or 200mm wide expansion joints at regular intervals (such as Figure 4 There are five 200mm wide expansion joints on the driveway of this project.

[0025] 1.3 Drawing Design Overview The original construction drawings of this project only had single-seam special-shaped steel expansion joint device nodes, which were not suitable for the 200mm wide expansion joint of the driving channel. Later, the design institute supplemented it and proposed to use comb-type steel plate expansion joints (such as Figure 1 as shown) or modular telescopic devices (as Figure 2 (As shown in the figure, this type of expansion joint is commonly used on municipal highway bridges and offers superior performance. However, its production is complex, expensive, and requires specialized expertise. Both initial installation and subsequent maintenance require specialized teams, resulting in high construction and maintenance costs. Furthermore, due to design omissions, adopting an overly costly approach during the detailed drawing development would be detrimental to the project's budget control.)

[0026] 2. Introduction of load-bearing steel plate expansion joint device Bridge expansion joints must simultaneously accommodate bridge deck deformation, ensure a smooth, non-jumpy surface, and prevent the infiltration of rainwater, debris, and soil. High installation precision is required for expansion joints, so they are typically installed after the surface paving is completed to ensure quality control. For this project, the expansion joints were installed after the ramp surface was constructed, allowing for full utilization of ramp transportation during construction without impacting the second-story steel structure and interior finishes.

[0027] Considering that the second-floor driving channel of the project is only used for low-speed freight traffic and is less subject to the impact of high-speed vehicles, and considering that the structures on both sides of the expansion joint of the driving channel are at the same elevation and plane, the force across the joint is relatively uniform. After in-depth communication with the design institute and the expansion joint manufacturer, the project department proposed a simple, reliable and durable load-bearing steel plate expansion joint device, which can reduce the cost by 50% while meeting the functional requirements.

[0028] Load-bearing steel plate expansion joint device (such as Figure 3It consists of a 4mm thick galvanized steel base, a 20mm thick Q235B steel cover, an M6 stainless steel center screw and slide rod, a 2mm thick rubber gasket, a rubber waterstop and a stainless steel drainage trough.

[0029] The waterstop and base are secured to the mounting notches on either side of the expansion joint using M8 plastic expansion anchors. A steel cover plate is mounted on the base, with rubber gaskets running the entire length of the base to provide shock absorption and cushioning. The steel cover plate is inverted and fastened to the base via stainless steel slide bars, ensuring it remains centered in the expansion joint during structural expansion and contraction. Gaps between the steel cover plate and the base, and between the base and the notch edges, are tightly sealed with elastic polyurethane sealant. A stainless steel gutter secures the lower portion of the expansion joint, catching and draining excess rainwater from above and enhancing waterproofing.

[0030] 3. Construction process and key steps 3.1 Process flow like Figure 5 As shown in the figure, the process flow of concrete pouring in the anchoring area is as follows: roughening the reserved anchoring area → cleaning the anchoring area → tying the steel bars in the anchoring area → setting up the notch hanging formwork → pouring and curing the concrete in the anchoring area. Expansion joint installation construction process: water stop and base installation → rubber gasket installation → slide rod installation → steel plate installation → inspection and correction → caulking → stainless steel drainage trough installation 3.2 Key processes of concrete pouring in the anchoring area 3.2.1 Chiseling and cleaning of concrete in the anchoring area Use an electric hammer to chisel the concrete in the reserved groove, remove loose concrete, floating slurry, etc., to form a rough surface, and use a high-pressure water pump to flush the groove to ensure that there is no residue in the groove and that the concrete poured successively is well bonded.

[0031] 3.2.2 Construction of steel bar binding and formwork hanging in the anchoring area like Figure 6 As shown, in order to improve the crack resistance and durability of the concrete in the anchoring area of the expansion joint device, an anti-cracking steel mesh is set on the concrete surface layer, and the steel mesh is tied or spot-welded to the reserved anchor bars of the structure to improve the integrity.

[0032] To ensure dense concrete pouring and high-quality molding in the anchoring area, and to ensure accurate dimensions for the expansion joint installation slot, a hanging formwork technique was adopted for the post-casting area. The side forms were constructed using 15mm thick wooden formwork, closely fitting the beam end walls and secured with square timber wedges. Furthermore, stiffening ribs were installed every 800mm along the side forms to increase their rigidity. The hanging formwork was constructed using 40mm x 70mm square timbers, connected by cross braces and then fixed to the side form stiffening ribs with steel nails, forming a single piece.

[0033] 3.2.3 Notch concrete pouring and repair like Figure 7As shown, the hanging formwork must be securely installed and accurately calibrated. During concrete pouring, sufficient vibration should be applied to ensure a dense, compacted concrete beneath the hanging formwork. When pouring to the designated notch elevation, use a three-meter ruler to promptly check for flatness. Any unsatisfactory areas should be promptly addressed. When the concrete nears initial set, a secondary press and screed should be performed to ensure accurate notch elevation and dimensions, and a smooth, even appearance. After removing the formwork, any notch defects should be repaired and corrected to achieve accurate notch dimensions and a smooth, even appearance.

[0034] 3.3 Key construction steps of expansion joint device 3.3.1 Rubber waterstop and base installation like Figure 8 As shown in the figure, after the maintenance and trimming of the notch is completed, a rubber water stop is laid on the notch and temporarily fixed, and then a positioning line is pulled to install a 4mm thick galvanized steel base. The base uses M8 plastic expansion anchors with a staggered spacing of 300mm.

[0035] 3.3.2 Installation of rubber gaskets, sliding rods and cross-seam steel plates like Figure 9 As shown, after the base is installed in place, a rubber gasket is laid on it, and the stainless steel slide bar is buckled on the bottom of the base according to the positioning. After the steel plate is laid, the M8 center screw is used to firmly connect it to the slide bar.

[0036] 3.3.3 Inspection, correction and caulking like Figure 10 As shown in the figure, during and after the installation of the steel plate expansion joint device, the position and elevation are corrected and checked.

[0037] Use a blower and a broom to clean up the gravel, dust and other garbage in the gaps around the cover plate, and seal the gaps between the steel cover plate and the base, and between the base and the groove edge with elastic polyurethane sealant.

[0038] 3.3.4 Install stainless steel drain trough like Figure 11 As shown, a stainless steel drainage trough is used to fix the lower part of the expansion joint to collect and discharge excess rainwater from the upper part, and connect it to the end rainwater pipe to ensure that the lower part of the driving channel is not eroded by rainwater, thereby improving the waterproof effect.

[0039] 4. Key points of construction quality control (1) Establish a project quality assurance system and quality management responsibility system, organize construction management personnel and on-site workers to conduct visual briefings before construction, ensure that construction personnel understand the process principles, understand the in-depth construction node diagram, clarify the construction process and quality acceptance standards of each key process, and ensure that the construction quality is controllable.

[0040] (2) The materials involved in the expansion joint installation must be inspected and re-inspected upon arrival, and strict control must be exercised over material procurement, inspection (re-inspection), and testing. All materials must have complete quality assurance documentation and be traceable.

[0041] (3) Adhere to the three-level inspection and acceptance system, strictly abide by the quality acceptance standards, and conscientiously implement the three steps of self-inspection by the operating team, comprehensive inspection by the construction staff, and verification by the quality inspector during each construction process.

[0042] (4) When roughening and cleaning the concrete in the anchoring area, ensure that the concrete debris is cleaned up and that the concrete poured successively is well bonded.

[0043] (5) Before construction, the embedded steel bars must be corrected and carefully inspected, with special attention paid to the presence of cracks, breaks, or missing steel bars. Cracked and broken steel bars must be promptly welded or reinforced according to welding specifications. Twisted embedded steel bars must be straightened, and missing parts must be rebar-planted as required. The rebar-planting depth should be 10 times the diameter of the steel bar. Rusted parts of the steel bars must be derusted. [2] (6) When pouring the groove concrete, ensure that it is vibrated and compacted. When the concrete is close to initial setting, it should be pressed and smoothed for the second time to ensure that the groove elevation and size are accurate, the appearance is flat and smooth, and timely maintenance is carried out to avoid cracks.

[0044] (7) When installing the expansion joint device, the positioning and verification work should be done well, and the position and elevation should be corrected and verified to ensure that the installation is completed straight and smooth as a whole.

[0045] (8) When installing the stainless steel drainage trough at the bottom of the expansion joint, ensure that it is firmly fixed to the structure, take sealing measures, set the slope according to the structure, ensure that there is no water in the trough, and improve the waterproof effect.

[0046] This application conducts in-depth research and application of the construction technology of heavy-duty steel plate expansion joint devices in the driving channel under actual working conditions. On the premise of ensuring construction quality and construction effect, by optimizing construction nodes, the quality of the expansion joint device itself and the installation construction quality are ensured, which improves the waterproof effect of the driving channel surface construction, increases the service life of the road surface itself, driving safety, comfort and driving noise, reduces project costs, and has good economic benefits.

Claims

1. A load-bearing steel plate expansion joint device, characterized in that: It includes a galvanized steel base placed on the side of the reserved groove preset in the concrete; the galvanized steel base is fixed to the installation slots on both sides of the expansion joint through plastic expansion anchors and waterstops; the steel cover is erected on the galvanized steel base on both sides of the expansion joint; the steel cover is buckled to the bottom of the galvanized steel base through an M6 stainless steel center screw and a sliding rod.

2. The load-bearing steel plate expansion joint device according to claim 1, characterized in that: A rubber gasket is usually laid between the steel cover plate and the galvanized steel base; at the same time, a rubber water stop arranged above the expansion joint and on the notches on both sides is fixed under the rubber gasket by gravity pressure.

3. A load-bearing steel plate expansion joint device according to claim 1 or 2, characterized in that: The gaps between the steel cover and the galvanized steel base, and between the galvanized steel base and the groove edge are tightly sealed with elastic polyurethane sealant.

4. The load-bearing steel plate expansion joint device according to claim 1, characterized in that: A stainless steel drainage trough is provided at the lower part of the expansion joint, and a joint for accessing a rainwater pipe is provided at the lower end of the drainage trough.

5. The specific construction method of a load-bearing steel plate expansion joint device according to claims 1-4, characterized in that: The following steps are involved: Step 1: Install the rubber waterstop and base; Step 2: Install rubber gaskets, sliding rods and cross-seam steel plates; Step 3: Check, correct and caulking; Step 4: Install the stainless steel gutter.

6. The specific construction method of a load-bearing steel plate expansion joint device according to claim 5 is characterized in that: The specific operation of the rubber waterstop and base installation in step 1 is: after the reserved concrete groove is maintained and trimmed, the rubber waterstop is laid and temporarily fixed, and then the positioning line is pulled to install the 4mm thick galvanized steel base. The base uses M8 plastic expansion anchors with a staggered spacing of 300mm.

7. The specific construction method of a load-bearing steel plate expansion joint device according to claim 5 is characterized in that: The specific operation of installing the rubber gasket, sliding rod and cross-seam steel plate in step 2 is: after the base is installed in place, the rubber gasket is laid on it, the stainless steel sliding rod is buckled on the bottom of the base according to the positioning, and after laying the steel plate, the M8 center screw is used to firmly connect it to the sliding rod.

8. The specific construction method of a load-bearing steel plate expansion joint device according to claim 5 is characterized in that: The specific operating steps of the step three of checking, correcting and caulking are as follows: after the installation of the steel plate expansion joint device is completed, the position and elevation are corrected and checked; gravel, dust and other garbage in the gaps around the cover are cleaned with a blower and a broom, and the gaps between the steel cover and the base, and between the base and the groove edge are sealed tightly with elastic polyurethane sealant.

9. The specific construction method of a load-bearing steel plate expansion joint device according to claim 5, characterized in that: The specific operation of installing the stainless steel drainage trough in step 4 is: fix the stainless steel drainage trough at the bottom of the expansion joint, collect and discharge excess rainwater from the upper part, and connect it to the end rainwater pipe to ensure that the lower part of the driving channel is not eroded by rainwater, thereby improving the waterproof effect.

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