Protective cover plate for wet joint between T beams and protection implementation method

Abstract

The invention discloses a wet joint protection cover plate between T beams and a protection implementation method. Before wet joint concrete is poured, the wet joint concrete pouring device is laid on the surface of a wet joint for passing safety of a wet joint connecting position and a surrounding road surface, and the situation that tools or other objects and equipment fall into the wet joint in the construction process of constructors, and consequently construction is affected is prevented. The protective cover plate is composed of a rectangular protective plate body, through holes are formed in the surface of the protective plate body, or the main body of the protective plate body is designed into a net shape; long-strip-shaped flexible materials are fixedly bonded to the left side edge and the right side edge of the protection plate body respectively, the flexible materials are sponge materials, when the protection cover plate is arranged between T beams, the flexible materials can be attached to the inner side faces of the T beams, and the flexible sponge materials can be attached to the inner side faces of the T beams to form good sealing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of T-beam wet joint protection, in particular to a T-beam wet joint protection cover plate and a protection implementation method. BACKGROUND

[0002] The wet joint protection cover plate, also known as a bridge construction protection plate, is laid on the surface of the wet joint before pouring concrete, and is used for the transition between the wet joint and the surrounding pavement. The core function of the T-beam wet joint protection cover plate is to ensure construction safety and construction quality of the wet joint concrete. Specifically, the following functions are required: Safety protection: This is the primary function, which can effectively prevent construction personnel and tools (such as steel bars and vibrating rods) from falling from the wet joint (T-beam gap), avoiding high-fall accidents. At the same time, it can prevent debris (such as gravel and formwork fragments) from falling onto the bridge below, protecting the safety of personnel or facilities below the bridge.

[0003] Temporary load bearing and stability: It needs to have a certain load bearing capacity to bear the weight of construction personnel and small equipment (such as small mixers and buckets), and after laying, it needs to be fixed firmly to the top surface of the T-beam to avoid displacement due to wind or construction disturbance, ensuring the stability of the operation.

[0004] In the construction of bridge T-beams, the wet joint reserved between the T-beams is a key structure to ensure the overall force of the beam body. During construction, the protection cover plate is used to ensure safety and concrete pouring quality. However, the current T-beam wet joint protection cover plate on the market still has many technical defects in actual application, which is difficult to meet the needs of efficient, safe, and high-quality construction, When the existing protection cover plate is placed between the T-beams, there will be gaps and cracks between the side edges of the protection cover plate and the inner side of the T-beam, which is difficult to seal well. The abutting of adjacent cover plates can prevent local lifting and avoid uneven abutting edges. The main problems are as follows: First, the sealing performance is insufficient, which can easily cause quality problems Most of the existing protection cover plates are made of rigid materials (such as steel plates and ordinary plastic plates). Due to insufficient processing precision and uneven surface of the T-beam flange plate, gaps or cracks often form between the left and right side edges of the cover plate and the inner side of the T-beam. This gap not only causes concrete leakage during wet joint concrete pouring, resulting in concrete loss and insufficient wet joint cross-section density (easy to form honeycomb and void), but also allows debris such as gravel and dust to fall into the wet joint during construction, polluting the embedded steel bars or blocking the steel bar gap. At the same time, rainwater can easily seep into the unhardened concrete along the gap, diluting the cement paste, reducing the strength of the concrete, and possibly causing steel corrosion, affecting the long-term durability of the wet joint. Second, the abutting stability of adjacent cover plates is poor, which poses a safety risk The butt joint of the conventional protective cover plate is usually connected by flat seam lap joint or simple bolt connection, which lacks precise positioning and fitting structure. On the one hand, the flat seam lap joint is easy to cause local buckling at the butt joint due to construction disturbance (such as personnel stepping, vibration influence), which forms a height difference on the surface of the cover plate, not only affects the walking stability of the construction personnel, but also may cause the slurry to seep along the buckling gap during concrete pouring. Third, the material performance and construction adaptability are insufficient, and the turnover utilization rate is low The material selection of the conventional protective cover plate has obvious shortcomings: if steel plate is used, although the bearing capacity is strong, the weight is large (the weight of a single piece often exceeds 30 kg), the manual handling and high-altitude installation are difficult, and the steel plate is easy to rust when used outdoors for a long time, so it needs to be frequently maintained; if solid wood or bamboo plywood is used, although the weight is lighter, the strength is low, it is easy to be damp, rot or broken, and it needs to be scrapped after single use, so the turnover times are only 5-8 times, resulting in high construction cost. At the same time, the surface of most cover plates is not treated for anti-skid, and the surface is slippery when it rains or the concrete slurry seeps, so the risk of slipping for the construction personnel is high; some composite material cover plates lack ultraviolet resistance and anti-aging design, and are easy to crack and deform when exposed outdoors for a long time, which further shortens the service life and is difficult to adapt to the working condition requirement of long construction period and outdoor operation of the bridge. In summary, the existing T-beam wet joint protective cover plate has significant defects in sealing performance, butt joint stability, fixing method and material adaptability, which not only affects the construction quality and efficiency of the wet joint, but also brings high safety hazards, and a new type of protective cover plate is needed to solve the above problems to meet the construction requirements of high quality, high efficiency and high safety of the bridge engineering. SUMMARY

[0005] Therefore, in order to solve the above problems, the present application provides a T-beam wet joint protective cover plate and a protection implementation method. The cover plate is used for the safety of the wet joint connecting part and the surrounding pavement before the concrete pouring of the wet joint, so as to prevent the tools or other objects and equipment of the construction personnel from falling into the wet joint during the construction process and affecting the construction.

[0006] The present application is realized in this way, a T-beam wet joint protective cover plate is constructed, which is practical in the protection of the wet joint, and characterized in that: the protective cover plate is composed of a rectangular protective plate body (1), a through hole (2) is formed on the surface of the protective plate body (1), or the main body of the protective plate body (1) is designed in a net shape; a long strip-shaped flexible material (3) is fixedly attached to the left and right sides of the protective plate body (1), and the flexible material (3) is made of sponge material; when the protective cover plate is placed between the T-beams (4), the flexible material (3) can be attached to the inner side of the T-beam, and the flexible sponge material can be attached to the inner side of the T-beam to form a good seal.

[0007] The T-beam between wet joint protection cover plate according to the application is characterized in that the front end face of the protection plate body (1) is provided with a plug-in convex column (1-1), the front end face is provided with a plug-in concave cavity (1-2) corresponding to the position of the plug-in convex column (1-1), and adjacent two groups of protection cover plates can be stably butted through the plug-in convex column (1-1) and the plug-in concave cavity (1-2), and after butting, local buckling can be prevented, and unevenness of the butting edge can be avoided.

[0008] The T-beam between wet joint protection cover plate according to the application is characterized in that the protection plate body (1) is made of aluminum alloy profiles, glass fiber reinforced plastic (FRP) or high-strength engineering plastic, the weight can be reduced by 30%-50%, manual carrying strength is reduced, and the construction load (≥2.5kN / m²) requirement is met; the surface of the metal cover plate is subjected to hot galvanizing + plastic spraying treatment, and the composite material cover plate is added with anti-ultraviolet and anti-aging additives, so that rusting and cracking caused by long-term outdoor use are avoided, and the turnover frequency is prolonged (from the traditional 5-8 times to 15-20 times); the protection plate body (1) is integrally formed with diamond patterns, strip-shaped anti-skid protrusions on the surface, or detachable rubber anti-skid pads (to avoid aging and falling of glue) are pasted, so that the risk of slipping caused by rain or concrete slurry leakage is solved.

[0009] The T-beam between wet joint protection cover plate according to the application is characterized in that after pouring is completed, if curing is needed, geotextile or plastic film can be directly laid on the cover plate (without removing the cover plate), and water is sprayed into the wet joint through the through hole for moisturizing, so that curing operation is simplified, and the concrete surface is prevented from being washed by curing water, and early strength development is ensured; the sponge flexible material on the left and right sides of the cover plate is closely attached to the inner side surface of the T-beam, and a closed pouring space is formed, so that material loss caused by slurry leakage during concrete pouring is avoided, and debris such as gravel and cement slag is prevented from falling into the wet joint, the purity of the concrete is ensured, and defects such as honeycomb and cavity are reduced. The cover plate itself has a bearing capacity of ≥2.5kN / m², and the construction personnel can stand on the cover plate to perform operations such as material distribution and observation during pouring, without directly stepping on the wet joint reinforcement (to avoid displacement of the reinforcement), and the anti-skid patterns on the surface of the cover plate / rubber pads can cope with the wet and slippery risk caused by concrete slurry leakage, and the operation safety is improved.

[0010] A protection implementation method of the T-beam between wet joint protection cover plate according to claim 1, characterized in that the method comprises the following operations. I. Preparation before construction T-beam surface and wet joint cleaning; (1) Remove gravel, dust, concrete residues on the top surface of the T-beam (4) and the inner side of the wet joint, and focus on cleaning the inner side surface of the T-beam (the attachment position of the flexible material (3)), to ensure that there is no protruding debris, and to avoid affecting the sealing effect of the sponge. (2) Cover plate special inspection; check the size of the protective plate body (1) (length, width need to match the wet joint span), check whether the through hole (2) is unobstructed; or the protective plate body (1) is in a net shape; (3) Check flexible material (3): confirm that the sponge is firmly bonded to the side edge of the protective plate body (1), and there is no falling off or damage, and the thickness of the sponge is uniform (to ensure sealing fit); (4) Check the plug-in convex column (1-1) and the plug-in concave cavity (1-2): confirm that the two sizes match and there is no deformation, and the adjacent cover plates can be smoothly fitted when they are butted. (5) Tool and sign preparation; Prepare a rubber hammer (for tapping the cover plate for positioning), a tape measure (to check the installation position), and a marker pen (to mark the corresponding points of the reinforcement and the tooth slot). II. Protective cover plate installation (1) Positioning and fixing of the first cover plate; personnel cooperate to lift the first cover plate to the starting position of the wet joint, lightly press the cover plate, and at the same time observe the sponge on the left and right sides of the protective plate body (1): ensure that the sponge is tightly attached to the inner side of the T-beam (4) without obvious gaps (if there is slight deviation, tap the side edge of the cover plate with a rubber hammer to adjust); (2) Butt joint and installation of adjacent cover plates; take the second cover plate and align its plug-in concave cavity (1-2) with the plug-in convex column (1-1) of the first cover plate, slowly push it to make the two smoothly fit, avoiding deformation of the plug-in convex column or damage to the plug-in concave cavity. (3) Repeat the fixing steps of the first cover plate: the sponge is attached to the inner side of the T-beam, and at the same time check the butt joint of the two cover plates: ensure that there is no local lifting, the edge is flat (use a ruler to abut the joint, the gap is ≤1mm); (4) Install the subsequent cover plates according to the above process, and check the whole once every 3 blocks to avoid cumulative deviation. III. Overall sealing and fixing review (1) After all the cover plates are installed, walk along the length direction of the wet joint to check: there is no obvious shaking when stepping on the cover plate; (2) The personnel touch the sponge and the inner side of the T-beam: confirm that there is no gap, if there is a small gap locally, a narrow strip of sponge (width ≤5cm) can be added to the outside of the sponge to strengthen the sealing effect; Check the through hole (2): ensure that it is unobstructed, and temporarily cover it with plastic film (to avoid debris falling into the wet joint); IV. Post-installation inspection and maintenance (1) Load bearing inspection: 1 construction personnel stand in the center of the cover plate, the cover plate is not bent, and the teeth are not deformed (satisfy the temporary load requirements of construction); (2) Butt joint inspection: the plug-in convex column-insertion concave cavity joint of adjacent cover plates is not loose, and the end of the cover plate is not separated when it is pulled with hands.

[0011] ​The protective cover plate and implementation method for wet joints between T-beams described in this patent effectively solve the problems of sealing, butt jointing, fixing, and material compatibility of existing protective covers through targeted structural design and material optimization. It addresses technical shortcomings in areas such as [specific areas] and offers the following multi-dimensional benefits: I. Significantly improves sealing performance and ensures the quality of wet joint construction. Eliminating gaps and preventing quality defects: The flexible sponge material on the left and right sides of the protective plate can adapt to minor unevenness on the inner surface of the T-beam, forming a tight seal and completely solving the problem of gaps easily left between the existing rigid cover plate and the T-beam. On the one hand, it can prevent grout leakage during concrete pouring, reduce concrete waste, ensure the density of the wet joint section, and avoid quality problems such as honeycomb and voids; on the other hand, it can prevent debris such as gravel and dust from entering the wet joint, prevent contamination of embedded steel bars or blockage of gaps, and at the same time, it can prevent rainwater from seeping in, avoid the reduction of strength of uncured concrete and corrosion of steel bars, and significantly improve the long-term durability of the wet joint.

[0012] II. Enhance connection and fixation stability to reduce construction safety risks. Precise alignment prevents warping and enhances walking safety: Adjacent cover plates are joined together by an interlocking "protruding post-interlocking cavity" structure, replacing traditional flat joints or simple bolt connections. This effectively prevents local warping at the joint caused by construction disturbances (such as personnel stepping on the plate or vibration), ensuring a flat surface (joint gap ≤ 1mm). This avoids workers slipping due to surface height differences and eliminates the risk of grout leakage from the joint and the risk of tools and personnel falling. It is especially suitable for high-altitude operations. III. Optimize material properties to improve construction efficiency and turnover economy. Lightweight design reduces work intensity: The protective panel is made of aluminum alloy profiles, FRP or high-strength engineering plastics, which reduces the weight by 30%-50% compared to traditional steel plates. The weight of a single cover plate can be controlled within 20kg, which can be manually carried and installed by 1-2 construction workers without relying on large hoisting equipment. This significantly reduces the difficulty of high-altitude operations and labor costs, and improves installation efficiency. Weather-resistant and wear-resistant design extends service life: Metal covers undergo hot-dip galvanizing and powder coating, while composite material covers are treated with UV-resistant and anti-aging additives, effectively resisting rust and cracking in open-air environments. Combined with integrated anti-slip textures or removable anti-slip mats, the risk of slipperiness due to rain or slurry leakage is eliminated. This design increases the cover's lifespan from the traditional 5-8 times to 15-20 times, reducing the cost of frequent replacements and lowering the overall lifespan cost. IV. The implementation methods are highly adaptable, ensuring the effective application of the technology. The protection implementation method matched with the patent is a whole-process management and control system formed from the T-beam cleaning before construction, the special inspection of the cover plate, the accurate positioning and butt joint review during installation, and the bearing and sealing inspection after installation. The method not only designs special operation steps (such as sponge fitting inspection) for the core structures of the cover plate, such as "flexible sealing, plug-in butt joint and tooth fixing", but also can adapt to the T-beam wet joint construction of different spans, Ensure that the technical advantages of the cover plate are fully utilized in actual projects to further ensure the quality and safety of wet joint construction. In summary, the patent can achieve the four goals of "improving construction quality, reducing safety risks, improving work efficiency and reducing use cost" through the synergistic optimization of structure, material and implementation method, solves many pain points of the existing T-beam wet joint protection cover plate, and has significant engineering application value and economic and social benefits. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a schematic diagram of the protection cover plate of the application; Fig. 2 is an implementation schematic diagram of the wet joint protection cover plate of the application. DETAILED DESCRIPTION

[0014] The application will be described in detail below with reference to the accompanying Figs. 1-2 The technical solutions in the embodiments of the application will be described in detail, and it should be apparent that the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0015] The application provides a wet joint protection cover plate between T-beams, which is practical in the protection of wet joints and can be implemented in the following manner as shown in the figure. The protection cover plate comprises an oblong protection plate body 1, and a through hole 2 is formed in the surface of the protection plate body 1. A flexible material 3 in the form of a strip is fixed to the left and right sides of the protection plate body 1. The flexible material 3 is made of sponge material and can be fitted between the inner side of the T-beam 4 when the protection cover plate is placed between the T-beams. The flexible sponge material can be fitted to the inner side of the T-beam to form a better seal.

[0016] In the implementation of the application, the front end face of the protection plate body 1 has a plug-in convex column 1-1, and the front end face has a plug-in concave cavity 1-2 corresponding to the position of the plug-in convex column 1-1. Adjacent two groups of protection cover plates can form smooth butt joints through the plug-in convex column 1-1 and the plug-in concave cavity 1-2. After butt joint, local lifting can be prevented, and uneven butt joint edges can be avoided.

[0017] In implementation, the protective panel 1 is made of aluminum alloy profiles, fiberglass reinforced plastic (FRP), or high-strength engineering plastics, reducing weight by 30%-50% and minimizing manual handling effort while meeting construction load requirements (≥2.5kN / m²). Metal covers are hot-dip galvanized and powder-coated, while composite material covers are treated with UV-resistant and anti-aging additives to prevent rusting and cracking during long-term outdoor use, extending the number of uses (from the traditional 5-8 times to 15-20 times). A diamond-patterned texture and striped anti-slip protrusions are integrally formed on the surface of the protective panel 1, or a removable rubber anti-slip mat is attached (to prevent adhesive aging and peeling), solving the problem of slippage in rainy or mixed environments. Risk of slipping due to concrete grout leakage.

[0018] Material performance optimization: Balancing lightweight, high strength, and durability. The core solution addresses the pain points of traditional cover plates (such as heavy steel plates and easily damaged wooden plates), improving ease of use and lifespan: Lightweight material alternatives: Replacing traditional steel plates / solid wood with aluminum alloy profiles, glass fiber reinforced plastics (FRP), or high-strength engineering plastics can reduce weight by 30%-50%, reduce the intensity of manual handling, and meet the construction load requirements (≥2.5kN / m²).

[0019] Corrosion and wear resistance upgrades: Hot-dip galvanizing and powder coating are applied to the surface of metal covers, and UV-resistant and anti-aging additives are added to composite material covers to prevent rusting and cracking during long-term outdoor use and extend the number of uses (from the traditional 5-8 times to 15-20 times).

[0020] Enhanced anti-slip performance: The cover plate surface is integrally molded with diamond-shaped patterns and strip-shaped anti-slip protrusions, or a removable rubber anti-slip mat is attached (to prevent the glue from aging and falling off), solving the risk of slipping caused by rain or concrete slurry leakage.

[0021] The following describes the implementation method for protecting the wet joint cover between the T-beams, specifically including: I. Pre-construction preparation Cleaning of T-beam surface and wet joints; (1) Remove gravel, dust and concrete residue from the top surface of T-beam 4 and the inside of the wet joint. Pay special attention to cleaning the inner side of T-beam (where it is in contact with the flexible material 3) to ensure there are no protruding debris and avoid affecting the sponge sealing effect. (2) Special inspection of the cover plate; verify the dimensions of the protective plate 1 (length and width must match the span of the wet joint), and check whether the through hole 2 is unobstructed; or design the main body of the protective plate 1 as a mesh; (3) Check the flexible material 3 (sponge): confirm that the sponge is firmly bonded to the side of the protective plate 1, without falling off or being damaged, and that the sponge thickness is uniform (to ensure a tight fit and seal). (4) Check the plug-in convex column 1-1 and plug-in concave cavity 1-2: confirm that the size matches, there is no deformation, and the adjacent cover plate can be smoothly fitted when butted; (5) Tool and identification preparation; Prepare rubber hammer (for tapping cover plate positioning), tape measure (check installation position), marker pen (mark the corresponding point of reinforcement and tooth slot); II. Protective cover plate installation (1) Positioning and fixing of the first cover plate; personnel cooperate to lift the first cover plate to the starting position of the wet joint, lightly press the cover plate, and at the same time observe the sponge (flexible material 3) on both sides of the protective plate body 1: ensure that the sponge is tightly attached to the inner side of the T beam 4 without obvious gap (if there is slight deviation, tap the side of the cover plate with a rubber hammer to adjust); (2) Butt joint and installation of adjacent cover plates; take the second cover plate, align its plug-in concave cavity 1-2 with the plug-in convex column 1-1 of the first cover plate, and slowly push it to make them smoothly fit, avoiding deformation of the plug-in convex column or damage to the plug-in concave cavity; (3) Repeat the fixing steps of the first cover plate: the sponge is attached to the inner side of the T beam, and at the same time check the butt joint of the two cover plates: ensure that there is no local lifting, the edge is flat (use a ruler to abut the butt joint, gap ≤1mm); (4) After installing the subsequent cover plates according to the above process, check them once as a whole after every 3 blocks to avoid cumulative deviation; III. Overall sealing and fixing review (1) After all the cover plates are installed, walk along the length direction of the wet joint to check: there is no obvious shaking when stepping on the cover plate; (2) The personnel touch the sponge attached to the inner side of the T beam: confirm that there is no gap, if there is a small gap locally, a narrow strip of sponge (width ≤5cm) can be added outside the sponge to strengthen the sealing effect; Check the through hole 2: ensure that it is unobstructed and can be temporarily covered with plastic film (to avoid debris falling into the wet joint); IV. Post-installation inspection and maintenance (1) Load bearing check: 1 construction personnel stand in the center of the cover plate, the cover plate is not bent, and the tooth is not deformed (satisfies the temporary load requirement of construction); (2) Butt joint check: there is no looseness at the butt joint of the plug-in convex column-insertion concave cavity of adjacent cover plates, and the end of the cover plate is not separated when it is pulled with hands. The social benefits and use value of the present application will be described below; I. Social benefits of the patent (1) Improve the safety level of bridge construction and reduce potential safety accidents. The protective cover plate eliminates gaps through sponge flexible sealing, prevents tilting through plug-in convex column- concave cavity structure, and has anti-slip surface design, etc., which fundamentally solves the problems of traditional cover plates, such as easy to leak mortar, easy to shift, and slippery surface, greatly reducing the risk of slipping, tool falling and beam damage. Especially in high-altitude operation scenarios, the stable docking and fixing structure can reduce more than 80% of safety hazards caused by cover plate problems, ensuring the safety of construction personnel, reducing the pressure of social safety management, and helping to promote the "zero accident" goal of the construction industry. (2) Promote green construction and resource conservation, and reduce environmental burden. In terms of materials, lightweight recyclable materials such as aluminum alloy and FRP are used to replace traditional one-time wooden / bamboo plywood or high-waste steel plates, increasing the turnover frequency of the cover plate from 5-8 times to 15-20 times, reducing the amount of construction waste by more than 60%; at the same time, hot galvanizing + plastic spraying treatment of metal surface and addition of anti-aging additives in composite materials reduce material corrosion and scrap rates, reducing resource waste and environmental pollutant emissions. (3) Ensure the quality of bridge engineering and improve the durability of infrastructure. Sponge sealing design eliminates concrete leakage and rainwater infiltration, avoiding problems such as honeycomb, cavity and steel corrosion in wet joints; auxiliary observation through holes ensure the density of concrete, ensuring the strength of wet joint structure from the construction link. This technology can extend the service life of the bridge by 5-10 years, reduce the cost of later maintenance and the impact of traffic interruption, and improve the reliability of public infrastructure, providing safer and more durable traffic services for the community. II. Value of Patent Use (1) Reduce construction costs and improve work efficiency. Lightweight materials reduce the weight of a single cover plate by 30%-50%, which can be manually carried and installed by 1-2 people without relying on large lifting equipment, reducing equipment rental and labor costs, and improving installation efficiency by more than 40%; the turnover frequency is increased to 15-20 times, reducing the replacement frequency by 2-3 times compared to traditional cover plates, reducing material procurement and replacement labor costs, and saving cover plate-related fees by 30%-50% per project. (2) Strong adaptability and wide application scenarios. The cover plate does not need to drill holes in T-beams, and can be adjusted through sponge self-adaptive fitting and plug-in structure to adapt to different span (such as 10-30m) T-beam wet joint construction; anti-slip design and weather-resistant treatment can cope with complex construction environments such as rain, high temperature, and open air, and are suitable for highway bridges, railway bridges, and municipal bridge T-beam construction, with a wide range of engineering application scenarios and high market promotion value. (3) Simple operation, low technical threshold; The supporting implementation method process is clear, from pre-construction cleaning, cover plate inspection to installation docking, review and maintenance, all are standardized operations (such as ruler inspection of the joint ≤1mm, rubber hammer fine adjustment positioning), without professional technical personnel, it can be completed, reduce the construction team technical training cost, facilitate the promotion and application in small and medium-sized construction enterprises, help to improve the overall construction technology level of the industry. (4) Prolong the service life of the equipment and create long-term value; The weather-resistant and wear-resistant design allows the cover plate to be used stably in the open environment for 3-5 years, reducing the downtime caused by frequent replacement; At the same time, by ensuring the construction quality of the wet joint, reducing the traffic control and maintenance cost during the later maintenance of the bridge, creating long-term economic value for the construction and operation parties, and reducing the resource consumption and travel inconvenience caused by infrastructure maintenance for the society. In summary, the patent not only promotes the development of safe, green and high-quality buildings in social benefits, but also reduces the cost and increases the efficiency for the construction party in use value, and expands the application scenarios for the industry.

[0022] The above description of disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective cover for wet joints between T-beams, the protective cover being used for the protection of wet joints, characterized in that; The protective cover consists of a rectangular protective plate (1), with through holes (2) on the surface of the protective plate (1), or the main body of the protective plate (1) is designed as a mesh; the left and right sides of the protective plate (1) are respectively glued and fixed with a long strip of flexible material (3), the flexible material (3) is made of sponge material, and when the protective cover is placed between T beams (4), the flexible material (3) can fit with the inner side of the T beam, and the flexible sponge material can fit with the inner side of the T beam to form a good seal.

2. The protective cover for wet joints between T-beams according to claim 1, characterized in that; The front end face of the protective plate (1) has a plug-in protrusion (1-1) and a plug-in cavity (1-2) corresponding to the position of the plug-in protrusion (1-1). Two adjacent sets of protective covers can form a smooth docking through the plug-in protrusion (1-1) and the plug-in cavity (1-2). After docking, it can prevent local lifting and avoid uneven docking edges.

3. The protective cover for wet joints between T-beams according to claim 1, characterized in that; The protective panel (1) is made of aluminum alloy profiles, glass fiber reinforced plastic (FRP) or high-strength engineering plastics, which can reduce the weight by 30%-50%, reduce the intensity of manual handling, and meet the construction load (≥2.5kN / m²) requirements. The surface of the metal cover is hot-dip galvanized and powder coated, and the composite material cover is added with anti-ultraviolet and anti-aging additives to avoid rusting and cracking during long-term open-air use and extend the number of turnovers (from the traditional 5-8 times to 15-20 times). The surface of the protective panel (1) is integrally formed with diamond pattern and strip anti-slip protrusions, or a detachable rubber anti-slip mat is pasted (to avoid glue aging and falling off) to solve the risk of slipping caused by rain or concrete slurry leakage.

4. The protective cover for wet joints between T-beams according to claim 1, characterized in that; After the pouring is completed, if curing is required, geotextile or plastic film can be laid directly on the cover plate (without removing the cover plate). Water can be sprayed into the wet joint through the through holes to keep it moist, which simplifies the curing operation and avoids the curing water from washing away the concrete surface, ensuring early strength development. The flexible sponge material on the left and right sides of the cover plate is closely attached to the inner side of the T-beam to form a closed pouring space. This can prevent material loss caused by grout leakage during concrete pouring, and at the same time prevent debris such as gravel and cement residue from falling into the wet joint, ensuring the purity of the concrete and reducing defects such as honeycomb and voids. The cover plate itself has a load-bearing capacity of ≥2.5kN / m². During pouring, construction workers can stand on the cover plate to carry out operations such as placing materials and observation without directly stepping on the wet joint steel bars (to avoid steel bar displacement). In addition, the anti-slip texture / rubber pad on the surface of the cover plate can cope with the risk of slipping caused by concrete slurry leakage, thus improving the safety of operation.

5. A method for implementing the protective cover plate for wet joints between T-beams according to claim 1, characterized in that; This includes the following operations; I. Pre-construction preparation Cleaning of T-beam surface and wet joints; (1) Remove gravel, dust and concrete residue from the top surface of T-beam (4) and the inside of the wet joint. Focus on cleaning the inner side of T-beam (where it is in contact with the flexible material (3)) to ensure there are no protruding debris and avoid affecting the sealing effect of the sponge. (2) Special inspection of the cover plate; verify the dimensions of the protective plate (1) (length and width must match the span of the wet joint), and check whether the through hole (2) is unobstructed; or the protective plate (1) is mesh-like; (3) Check the flexible material (3): Confirm that the sponge and the protective board (1) are firmly bonded to the side, without falling off or being damaged, and that the sponge thickness is uniform (to ensure a tight fit and seal). (4) Check the insertion protrusion (1-1) and insertion cavity (1-2): confirm that the two are sized and free from deformation, and that the adjacent cover plates can fit together smoothly; (5) Preparation of tools and markings; prepare a rubber mallet (for tapping the cover plate for positioning), a tape measure (for checking the installation position), and a marker (for marking the corresponding points of the reinforcing bars and the toothed grooves); II. Installation of Protective Cover Plates (1) Positioning and fixing the first cover plate; personnel work together to lift the first cover plate to the starting position of the wet joint, press the cover plate lightly, and at the same time observe the sponge on the left and right sides of the protective plate (1): ensure that the sponge is tightly attached to the inner side of the T beam (4) without obvious gaps (if there is a slight deviation, use a rubber hammer to tap the side of the cover plate to adjust). (2) Connecting and installing adjacent cover plates; take the second cover plate, align its insertion cavity (1-2) with the insertion protrusion (1-1) of the first cover plate, and slowly push it in so that the two fit together smoothly, avoiding deformation of the insertion protrusion or damage to the insertion cavity; (3) Repeat the first cover plate fixing steps: the sponge is attached to the inner side of the T beam, and at the same time, check the joint of the two cover plates: ensure that there is no local lifting and the edges are flat (use a ruler to touch the joint, the gap is ≤1mm). (4) Install the subsequent cover plates one by one according to the above process. After every 3 plates are installed, perform an overall inspection to avoid cumulative offset. III. Overall Sealing and Fixation Verification (1) After all the cover plates are installed, walk along the length of the wet joint to check: there is no obvious shaking when stepping on the cover plate; (2) Touch the sponge and the inner side of the T beam with your hand: confirm that there is no gap. If there are small gaps in some areas, you can add narrow strips of sponge (width ≤ 5cm) to the outside of the sponge to enhance the sealing effect. Check the through hole (2): Ensure it is unobstructed, and temporarily cover it with plastic film (to prevent debris from falling into the wet joint). IV. Post-installation inspection and maintenance (1) Load-bearing inspection: One construction worker stands in the center of the cover plate. The cover plate is not bent and the teeth are not deformed (meeting the temporary load requirements of construction). (2) Connection inspection: There is no looseness at the joint of the adjacent cover plate protrusion and the joint cavity. When the end of the cover plate is bent by hand, there is no separation at the joint.

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