Bridge deck anti-collision guardrail construction trolley and construction method

Abstract

The invention discloses a bridge deck anti-collision guardrail construction trolley and a construction method. The trolley comprises a walking trolley body and two sets of T-shaped hoisting supporting frames, the T-shaped hoisting supporting frames and the walking trolley body are fixedly installed to form a whole, and each T-shaped hoisting supporting frame is divided into a stand column and a cross beam; a walking trolley is arranged on the cross beam, a motor rolling mechanism is installed at the lower end of the walking trolley, and the walking trolley and the motor rolling mechanism form a whole to drive the motor rolling mechanism to move back and forth on the cross beam. A hook corresponding to the end part of the motor rolling mechanism can be used for hoisting an anti-collision guardrail template; two sets of weight boxes are hung at the inner end of the beam, and a construction hanging basket is arranged below the outer end of the beam. The bridge deck anti-collision guardrail construction equipment integrates the functions of formwork hoisting, concrete pouring and an aerial work platform, and has the characteristics of efficient walking, safety, stability and remote control, so that the construction efficiency is improved, the operation safety is guaranteed, the engineering cost is reduced, and the high-standard requirement of modern bridge deck anti-collision guardrail construction is met.

Description

Technical Field

[0001] This invention relates to the field of construction equipment for bridge deck concrete crash barriers, specifically to a bridge deck crash barrier construction trolley and construction method. Background Technology

[0002] In the construction of concrete crash barriers for bridge decks, formwork hoisting, concrete pouring, and post-construction finishing are the core processes, and their efficiency and safety directly affect the overall project progress and quality. Currently, the industry mostly uses traditional methods for the construction of bridge crash barriers, relying mainly on cranes in conjunction with manual labor for formwork hoisting. This method has significant limitations. When hoisting formwork, the positioning is difficult to control, requiring multiple adjustments to meet installation requirements. When workers are connecting formwork, pouring concrete, and finishing at the edge of the bridge deck, there is a lack of stable support structures, safety protection measures, and necessary space for movement, exposing workers to the risk of falls from heights, and their safety cannot be effectively guaranteed. Furthermore, in the traditional construction process, the concrete pouring stage requires manual handling of hoppers for material distribution, which is not only labor-intensive but also prone to uneven distribution. Some existing construction trolleys are single-function, only capable of one process at a time, such as formwork hoisting or concrete pouring, failing to form an integrated construction process. Multiple machines must be used in conjunction, increasing equipment investment costs and on-site management difficulties. It is difficult to adapt to the needs of rapid construction of large-area bridge decks; the equipment counterweight design is unreasonable, and the center of gravity is prone to shift when hoisting formwork or carrying construction personnel, which poses a risk of overturning, further limiting its promotion and application in actual projects. To address the aforementioned issues, the industry urgently needs a bridge deck crash barrier construction equipment that integrates formwork hoisting, concrete pouring, and aerial work platform functions, while also possessing efficient mobility, safety and stability, and remote control capabilities. This would improve construction efficiency, ensure operational safety, reduce project costs, and meet the high standards required for modern bridge deck crash barrier construction. Summary of the Invention

[0003] Therefore, to address the aforementioned shortcomings, this invention provides a bridge deck crash barrier construction trolley. By cooperating with a movable folding bracket and an electric hoist, the trolley is raised and lowered, allowing concrete to be directly and precisely injected into the formwork cavity via a receiving hopper and discharge pipe, replacing manual material handling and further improving pouring efficiency. Thus, this application is a bridge deck crash barrier construction equipment that integrates formwork hoisting, concrete pouring, and a high-altitude work platform, possessing efficient mobility, safety, stability, and remote control characteristics. This improves construction efficiency, ensures operational safety, reduces project costs, and meets the high standards required for modern bridge deck crash barrier construction.

[0004] This invention is implemented as follows: a bridge deck anti-collision guardrail construction trolley is constructed for hoisting and grinding concrete anti-collision guardrail templates. The trolley comprises a traveling trolley body (1) and two sets of T-shaped hoisting support frames (2) fixedly installed with the traveling trolley body (1) to form an integral structure. The T-shaped hoisting support frame (2) consists of columns and crossbeams. A traveling trolley (3) is mounted on the crossbeam, and a motor winding mechanism (4) is installed at the lower end of the traveling trolley (3), forming an integral structure with the motor winding mechanism (4) to drive the motor winding mechanism (4) to move back and forth on the crossbeam. The hooks corresponding to the ends of the motor winding mechanism (4) can be used for hoisting anti-collision guardrail templates. Two sets of counterweight boxes (5) are suspended at the inner end of the crossbeam, and a construction basket (6) is set below the outer end of the crossbeam. The construction basket (6) is rotatably connected to the lower ends of two sets of movable folding supports (7). The upper end of the beam is rotatably connected to the lower end of the corresponding crossbeam; and an electric hoist (8) is installed at the lower end of the corresponding crossbeam. The electric hoist (8) is connected to the construction basket (6) via a chain. When construction is required, the personnel are inside the construction basket (6) and control the electric hoist (8) to lower the construction basket (6). At this time, the movable folding bracket (7) changes from bending to straightening. When the construction is completed and the construction basket (6) needs to be lifted, the electric hoist (8) is controlled to directly lift the construction basket (6). At this time, the movable folding bracket (7) changes from its original straight state to a bent shape, which is convenient for lifting the construction basket (6). Concrete receiving hoppers (9) for guardrail pouring are installed on the two crossbeams via brackets. The bottom of the receiving hopper is connected to the concrete discharge pipe (10). After the guardrail template is hoisted into place, the concrete for guardrail pouring can be pumped into the receiving hopper and discharged into the template cavity through the discharge pipe, thereby realizing the pouring and forming of the bridge deck concrete anti-collision guardrail.

[0005] According to the present invention, a bridge deck anti-collision guardrail construction trolley is characterized by: a suspended basket (6 meters long, 0.8 meters high, and 0.64 meters wide); and a counterweight box (1.2 tons / box, 2.4 tons / box (this is the weight of the counterweight box when fully loaded)).

[0006] According to the present invention, a bridge deck anti-collision guardrail construction trolley is characterized in that: the trolley body (1) is driven by a motor, the trolley body travels at a speed of 10 meters / minute, the power input is a 380V power supply, and the operation of the trolley body, electric hoist and motor winding mechanism (4) can all be remotely controlled.

[0007] According to the present invention, a bridge deck anti-collision guardrail construction trolley is characterized in that: the columns and crossbeams can be made of 250 type I-beams or 280 type I-beams; the crossbeams are 6 meters long and the columns are 3.8 meters high.

[0008] A construction method for a bridge deck crash barrier construction trolley as described above, characterized by the following operations: I. Pre-construction preparation stage; Equipment debugging and counterweight configuration; check the motor drive system of the traveling trolley body (1) to ensure that the remote control signals of the trolley body, electric hoist (8), and motor winding mechanism (4) are stable; select the loading weight of the counterweight box (5) according to the weight of the template in this construction - if the template weight is ≤1.5 tons, load the single counterweight box to 1.2 tons, and the two sets together to 2.4 tons; if the template weight is >1.5 tons, load the single counterweight box to 2.4 tons, and the two sets together to 4.8 tons. Hang the counterweight box at the inner end of the crossbeam and calibrate the center of gravity of the equipment with a level to avoid the center of gravity shifting. After the construction workers enter the construction basket (6) and fasten their safety ropes, they remotely operate the electric hoist (8) at the bottom of the crossbeam and slowly lower the chain. At this time, the movable folding bracket (7) gradually straightens from the initial bent state until the bottom of the basket is flush with the top of the guardrail template. After the movable folding bracket is fully straightened, it forms a stable support. The electric hoist braking device is turned off, and the position of the basket is locked. II. Implementation of construction procedures; (a) Formwork hoisting and installation Template lifting and positioning: Remote control operation of the traveling trolley (3) on the crossbeam, control the motor winding mechanism (4) to lower the hook, manually assist in firmly connecting the hook to the anti-collision guardrail template, remote control motor winding mechanism (4) to wind up and lift the template, and at the same time adjust the horizontal position of the template through the traveling trolley (3) so that the template moves to the top of the construction axis; Precise template alignment: Slowly lower the template to the predetermined position of the guardrail foundation. Construction workers assist in calibrating the verticality of the template at the edge of the bridge deck. When the template position deviation is ≤3mm, fix the bottom connector of the template. Repeat the above steps to complete the hoisting and splicing of adjacent templates. The splicing joints are treated with sealant to prevent concrete leakage. Concrete pouring construction: Align the lower end of the concrete discharge pipe (10) with the inlet of the first section of the formwork in advance, and fix the connection between the discharge pipe and the formwork with a clip; fix the concrete receiving hopper (9) between the two crossbeams with a bracket to ensure that the discharge port at the bottom of the receiving hopper is sealed to the discharge pipe to avoid concrete leakage. Start the concrete pump truck and pump the well-mixed anti-collision guardrail concrete into the receiving hopper (9). After the concrete is buffered by the receiving hopper, it is injected into the inner cavity of the formwork at a uniform speed through the discharge pipe (10); during the pouring process, the workers in the basket use a vibrator to vibrate the concrete to ensure that the concrete is dense; when the concrete is poured to the design elevation of the top of the formwork, stop pumping, close the discharge pipe valve, and scrape the concrete surface at the top of the formwork. After the concrete is poured, it is cured according to the specifications. After the curing period, the motor winding mechanism (4) is remotely operated to connect the hook to the top lifting point of the template and slowly lift the template. At the same time, the workers in the basket assist in separating the template from the concrete guardrail. After the template is removed, it is moved to the designated stacking area on the bridge deck. After the template is removed, the electric hoist (8) is remotely controlled to lift the construction basket (6). At this time, the movable folding bracket (7) gradually bends from the straight state until the basket rises to the bottom of the crossbeam. Then the remotely controlled traveling trolley (1) moves to the next section of the guardrail construction position at a speed of 10 meters / minute. The "template hoisting-pouring-removal" process is repeated until the entire bridge deck anti-collision guardrail construction is completed. After the formwork is hoisted and demolded, the workers use grinding tools to grind the inner surface of the formwork to ensure that the inner surface of the formwork is smooth. At the same time, they check the sealing of the formwork joints. If the sealant is found to be detached, it is applied in time. After the grinding is completed, the bridge deck personnel are notified by remote control to prepare for the concrete pouring stage.

[0009] The present invention has the following advantages: Firstly, the implementation of this trolley improves construction efficiency: It integrates three core functions—formwork hoisting, concrete pouring, and high-altitude operations—eliminating the need for multiple pieces of equipment to work together, effectively reducing equipment switchover and site coordination time. The trolley body is motor-driven, with a travel speed of up to 10 meters per minute, allowing for rapid adaptation to the needs of large-area bridge construction. The trolley drives a motor-driven winding mechanism to move back and forth on the crossbeam, achieving precise and rapid formwork hoisting. Concrete is directly and precisely injected into the formwork cavity through the receiving hopper and discharge pipe, replacing manual material handling and further improving pouring efficiency. Secondly, the lifting and lowering of the suspended platform is achieved by coordinating the movable folding bracket with the electric hoist: the construction suspended platform is supported by the dual connection of the movable folding bracket and the electric hoist. When lowering, the bracket straightens to form a stable support structure, and when lifting, the bracket bends for easy storage, which significantly enhances the structural stability and effectively avoids the risk of construction personnel falling from heights; moreover, the vehicle body crane, electric hoist, and motor winding mechanism all support remote control, allowing construction personnel to operate away from dangerous work areas, further ensuring personal safety. Third, ensuring construction quality and improving the structural performance of the guardrail: The columns and beams of the T-shaped hoisting support frame are made of 250 or 280 type I-beams, which have high structural strength and can ensure the stability of the formwork during hoisting, avoiding formwork displacement due to deformation of the support structure and improving the accuracy of formwork installation; The combination design of the concrete receiving hopper and discharge pipe realizes uniform and continuous concrete distribution, avoiding the problem of insufficient concrete density caused by uneven distribution by manual labor, ensuring the structural strength and appearance quality of the guardrail; At the same time, construction personnel can perform formwork docking and post-grinding and finishing in a stable suspended basket, with higher operational precision, effectively reducing construction errors and improving the overall construction quality of the crash barrier. Fourth, simplified operation procedures and reduced manpower and cost input: The trolley enables integrated construction, eliminating the need for additional cranes, concrete handling equipment, and scaffolding erection personnel, thus reducing equipment procurement and labor costs; remote control replaces manual on-site operation, reducing labor intensity, and a single person can complete operations such as equipment movement, formwork hoisting, and scaffold lifting, reducing the number of workers required; the movable and foldable bracket design makes scaffold storage convenient, without occupying additional bridge deck space, especially suitable for narrow bridge decks or two-way construction scenarios, avoiding interference from equipment, vehicles, and other construction processes, reducing on-site management difficulty and coordination costs. Applicable to crash barrier construction scenarios on various types of bridge decks, such as highways and municipal bridges. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the construction trolley implementation structure of this application; Figure 2 This is a schematic diagram of the trolley parameters in this application. Detailed Implementation

[0011] The following will be combined with the appendix Figures 1-2 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0012] This invention provides a bridge deck crash barrier construction trolley, used for hoisting formwork and grinding / finishing concrete crash barriers on bridge decks. Figures 1-2As shown, it can be implemented as follows: The trolley consists of a traveling trolley body 1 and two sets of T-shaped hoisting support frames 2 that are fixedly installed with the traveling trolley body 1 to form an integral whole. The T-shaped hoisting support frame 2 is divided into columns and crossbeams. A traveling trolley 3 is installed on the crossbeam, and a motor winding mechanism 4 is installed at the lower end of the traveling trolley 3, forming an integral whole with the motor winding mechanism 4 to drive the motor winding mechanism 4 to move back and forth on the crossbeam. The hooks at the ends of the motor winding mechanism 4 can be used for hoisting the template for the anti-collision guardrail. Two sets of counterweight boxes 5 are suspended at the inner end of the crossbeam, and a construction basket 6 is installed below the outer end of the crossbeam. The construction basket 6 is rotatably connected to the lower ends of two sets of movable folding brackets 7, and the upper ends of the movable folding brackets 7 are rotatably connected to the lower ends of the corresponding crossbeams. Furthermore, an electric hoist 8 is installed at the lower end of the corresponding crossbeam. The electric hoist 8 is connected to the construction basket 6 via a chain. When construction is required, personnel are located inside the construction basket 6 and control the electric hoist 8 to lower the construction basket 6. At this time, the movable folding bracket 7 changes from bent to straight. When the construction is completed and the construction basket 6 needs to be lifted, the electric hoist 8 is controlled to directly lift the construction basket 6. At this time, the movable folding bracket 7 changes from its original straight state to a bent shape, making it convenient to lift the construction basket 6. Concrete receiving hoppers 9 for guardrail pouring are installed on the two crossbeams via brackets. The bottom of the receiving hopper is connected to a concrete discharge pipe 10. After the guardrail formwork is hoisted into place, the concrete for guardrail pouring can be pumped into the receiving hopper and discharged into the inner cavity of the formwork through the discharge pipe, thereby realizing the pouring and forming of the bridge deck concrete anti-collision guardrail.

[0013] During implementation; suspended platform (6 meters long, 0.8 meters high, and 0.64 meters wide); counterweight boxes (1.2 tons / box, 2.4 tons / box (this is the weight of the counterweight box when fully loaded)); During implementation; the traveling trolley body 1 is driven by a motor, the traveling speed of the trolley body is 10 meters / minute, the power input is 380V power supply, and the operation of the trolley body, electric hoist and motor winding mechanism 4 can all be remotely controlled; During implementation, the columns and beams can be made of 250-type or 280-type I-beams; the beams are 6 meters long and the columns are 3.8 meters high.

[0014] The following is a detailed explanation of the construction process of the bridge crash barrier construction trolley; I. Pre-construction preparation stage; Equipment debugging and counterweight configuration; check the motor drive system of the traveling trolley 1 to ensure the stability of the remote control signals of the trolley, electric hoist 8, and motor winding mechanism 4 (the remote control coverage must meet the construction radius requirements); select the loading weight of the counterweight box 5 according to the weight of the template for this construction (usually the weight of a single anti-collision guardrail template is ≤3 tons) - if the template weight is ≤1.5 tons, load a single counterweight box to 1.2 tons, and two sets to a total of 2.4 tons; if the template weight is >1.5 tons, load a single counterweight box to 2.4 tons, and two sets to a total of 4.8 tons. Suspend the counterweight box at the inner end of the crossbeam and calibrate the equipment center of gravity with a level to avoid center of gravity shift. Equipment placement and site clearing; remote control of the traveling trolley 1 is used to move it to the starting position of the bridge crash barrier construction, so that the outer end of the crossbeam (6 meters long) of the T-shaped hoisting support frame 2 is aligned with the construction axis of the barrier; debris on the bridge surface in the construction area is cleared to ensure that there are no obstacles in the traveling trolley's path, and a warning area is set up on the ground below the construction basket 6 to prevent non-construction personnel from entering. Construction workers enter the construction basket 6 (6 meters long, 0.8 meters high, and 0.64 meters wide, accommodating 2-3 workers at a time). After securing their safety ropes, they remotely operate the electric hoist 8 at the lower end of the crossbeam to slowly lower the chain. At this time, the movable folding bracket 7 gradually straightens from its initial bent state until the bottom of the basket is flush with the top of the guardrail template (the basket height can be precisely adjusted via the electric hoist, with an adjustment accuracy of ±5mm). Once the movable folding bracket is fully extended, it forms a stable support. The electric hoist braking device is then turned off, and the basket position is locked. II. Implementation of core construction procedures; (a) Formwork hoisting and installation Template Lifting and Positioning: The traveling trolley 3 on the crossbeam is remotely controlled to lower the hook via the motor-driven winding mechanism 4. With manual assistance, the hook is securely connected to the guardrail template. The motor-driven winding mechanism 4 then retracts and lifts the template, while the traveling trolley 3 adjusts the template's horizontal position to ensure it is directly above the construction axis (the column is 3.8 meters high; ensure the template's lifting height is at least 50cm higher than the bridge guardrail foundation to avoid collisions). Precise Template Alignment: The template is slowly lowered to the predetermined position on the guardrail foundation. Construction personnel assist in calibrating the template's verticality at the bridge edge. When the template's positional deviation is ≤3mm, the bottom connector is fixed. The above steps are repeated to complete the lifting and splicing of adjacent templates. The splice joints are sealed with sealant to prevent concrete leakage. Concrete pouring construction: Align the lower end of the concrete discharge pipe 10 (pipe diameter selected according to the guardrail cross-section size, usually 150-200mm) with the inlet of the first section of the formwork in advance, and fix the connection between the discharge pipe and the formwork with clips; fix the concrete receiving hopper 9 between the two crossbeams using a bracket to ensure a sealed connection between the bottom outlet of the receiving hopper and the discharge pipe to prevent concrete leakage. Start the concrete pump truck and pump the well-mixed special concrete for the crash barrier (slump 120-160mm) into the receiving hopper 9. After being buffered by the receiving hopper, the concrete is injected into the inner cavity of the formwork at a uniform speed through the discharge pipe 10; during the pouring process, the workers in the basket use a vibrator (the vibrator extends into the formwork from the reserved hole on the side of the basket) to vibrate the concrete to ensure that the concrete is dense (vibration spacing ≤50cm, vibration time 15-20 seconds per spot); when the concrete is poured to the design elevation of the top of the formwork, stop pumping, close the discharge pipe valve, and scrape the concrete surface at the top of the formwork. After the concrete is poured, it is cured according to specifications (7 days at room temperature, and insulation is required in winter). After the curing period, the motor-driven winch mechanism 4 is remotely operated to connect the hook to the top lifting point of the formwork and slowly lift the formwork (lifting speed ≤ 0.5 m / min). At the same time, the workers inside the basket assist in separating the formwork from the concrete guardrail (if there is adhesion, use a pry bar to gently tap the side of the formwork). After the formwork is removed, it is moved to the designated stacking area on the bridge deck. After the formwork is removed, the electric hoist 8 is remotely controlled to lift the construction basket 6. At this time, the movable folding bracket 7 gradually bends from the straight state until the basket rises to below the crossbeam (the storage height ≤ 1.2 meters to avoid occupying bridge deck space). Then, the traveling trolley body 1 is remotely controlled to move to the next guardrail construction position at a speed of 10 m / min, and the "formwork hoisting-pouring-removal" process is repeated until the construction of the entire bridge deck anti-collision guardrail is completed. After hoisting and demolding, the workers used grinding tools to grind the inner surface of the template (to remove rust and concrete residue) to ensure that the inner surface of the template was smooth. At the same time, they checked the sealing of the template joints. If the sealant was found to be detached, it was applied in time. After grinding was completed, the bridge deck personnel were notified by remote control to prepare for the concrete pouring stage. The following section elaborates on the social benefits and application value of the patented bridge deck crash barrier construction trolley. I. Social Benefits Protect the lives of construction workers and reduce the incidence of safety accidents. Traditional bridge crash barrier construction relies on cranes and simple scaffolding, posing significant safety hazards such as falls from heights and equipment overturning. This vehicle employs a dual safety design to create a robust protective barrier: firstly, two sets of counterweights precisely balance the center of gravity, coupled with high-strength support from 250 / 280 type I-beams, completely eliminating the risk of equipment overturning; secondly, the construction basket forms stable support through a movable folding bracket and an electric hoist, and all operations can be remotely controlled, eliminating the need for personnel to work on-site at dangerous edges. After its widespread application, this technology can reduce the incidence of high-altitude accidents during bridge crash barrier construction, effectively protecting the lives of construction workers and reducing social conflicts and family tragedies caused by safety accidents. Improving construction efficiency and facilitating the rapid delivery of transportation projects. The trolley integrates formwork hoisting, concrete pouring, and grinding / finishing functions, with a travel speed of up to 10 meters per minute, more than doubling the efficiency of traditional equipment. In transportation projects such as highways and municipal bridges, rapid construction can significantly reduce bridge closure time, minimizing the impact on citizens' travel and logistics. For example, in the construction of guardrails for a cross-river bridge in a certain city, using this trolley reduced the construction period from the original 45 days to 30 days, reducing traffic congestion, improving the public's travel experience, and indirectly promoting regional economic circulation efficiency. Promote standardized construction practices in the industry and reduce resource waste. Traditional construction relies on manual experience, which easily leads to problems such as formwork installation deviations and uneven concrete distribution, resulting in high rework rates (approximately 15%-20%) and waste of resources such as steel and concrete. This machine, through remote-controlled precision control (formwork positioning deviation ≤3mm, suspended platform height adjustment accuracy ±5mm) and a uniform concrete distribution design in the concrete receiving hopper and discharge pipe, reduces the rework rate to below 3%, significantly reducing building material waste. At the same time, the integrated design of the equipment avoids resource idleness when multiple machines are operating simultaneously, aligning with the national "green building" concept and helping the construction industry achieve energy conservation and emission reduction goals. II. Application Value Adaptable to various construction scenarios, expanding the scope of engineering applications The trolley design fully considers different engineering needs: the crossbeam is 6 meters long and the column is 3.8 meters high, which can cover the construction height and width of most bridge deck guardrails; the optional configuration of 250-type / 280-type I-beams can adapt to templates of different weights, from 1.5 tons to above; the traveling speed of 10 meters per minute balances small-scale precision construction with large-area rapid advancement. Therefore, this equipment can be widely used in the construction of different types of crash barriers for highway bridge decks, municipal bridges, cross-sea bridges, and urban expressways, and is especially suitable for scenarios where traditional equipment is difficult to adapt to, such as narrow bridge decks and two-way construction, with an application coverage rate of over 95%. Reduce project costs and improve corporate economic efficiency From a cost perspective, the trolley can achieve triple cost savings: First, it reduces equipment investment, as its integrated functions replace cranes and concrete handling equipment, reducing equipment procurement costs per project by 40%-50%; second, it reduces labor costs, as remote operation reduces the number of personnel per work site from 5-6 to 2-3, saving 50% in labor costs; and third, it reduces rework costs, as improved construction precision reduces material waste and rework expenses by more than 60%. Taking a section of a highway (10 kilometers of guardrail) as an example, using this trolley can save a total cost of approximately 800,000-1.2 million yuan, significantly enhancing the market competitiveness of construction companies. Promote construction technology innovation and guide the direction of industry development. This vehicle integrates the concepts of "mechanization + remote control + integration" into bridge deck guardrail construction, changing the traditional model of "primarily manual labor with equipment assistance," and driving the industry's transformation from "labor-intensive" to "technology-intensive." Its core technologies (such as the linkage design of the movable folding bracket, precise matching of counterweight and load, and integrated control of multiple processes) can provide a reference for the development of similar construction equipment, driving the technological upgrade of bridge deck construction equipment and contributing to the high-quality development of the construction industry. Simultaneously, the equipment's standardized construction process can be incorporated into industry standards, promoting the formation of unified technical standards for bridge deck crash barrier construction and improving the overall construction level of the industry.

[0015] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bridge deck crash barrier construction trolley, used for hoisting formwork and grinding / finishing concrete crash barriers on bridge decks, characterized in that; The trolley consists of a traveling trolley body (1) and two sets of T-shaped hoisting support frames (2) fixedly installed with the traveling trolley body (1) to form an integral whole. The T-shaped hoisting support frame (2) is divided into columns and crossbeams. A traveling trolley (3) is installed on the crossbeam. A motor winding mechanism (4) is installed at the lower end of the traveling trolley (3) and forms an integral whole with the motor winding mechanism (4) to drive the motor winding mechanism (4) to move back and forth on the crossbeam. The hooks at the ends of the motor winding mechanism (4) can be used for hoisting the templates for the anti-collision guardrail. Two sets of counterweight boxes (5) are suspended at the inner end of the crossbeam. A construction basket (6) is set below the outer end of the crossbeam. The construction basket (6) is rotatably connected to the lower end of two sets of movable folding brackets (7). The upper end of the movable folding brackets (7) is rotatably connected to the lower end of the corresponding crossbeam. An electric hoist (8) is installed at the lower end of the structure. The electric hoist (8) is connected to the construction basket (6) via a chain. When construction is required, personnel are located inside the construction basket (6) and control the electric hoist (8) to lower the construction basket (6). At this time, the movable folding bracket (7) changes from bent to straight. When the construction is completed and the construction basket (6) needs to be lifted, the electric hoist (8) is controlled to lift the construction basket (6) directly. At this time, the movable folding bracket (7) changes from its original straight state to a bent shape, which is convenient for lifting the construction basket (6). Concrete receiving hoppers (9) for guardrail pouring are installed on the two crossbeams via brackets. The bottom of the receiving hopper is connected to a concrete discharge pipe (10). After the guardrail template is hoisted into place, the concrete for guardrail pouring can be pumped into the receiving hopper and discharged into the template cavity through the discharge pipe, thereby realizing the pouring and forming of the bridge deck concrete anti-collision guardrail.

2. The bridge deck anti-collision guardrail construction trolley according to claim 1, characterized in that; The suspended platform is 6 meters long, 0.8 meters high, and 0.64 meters wide; there are two counterweight boxes, each with a capacity of 1.2 tons and 2.4 tons, which is the weight of the counterweight boxes when fully loaded.

3. The bridge deck anti-collision guardrail construction trolley according to claim 1, characterized in that; The trolley body (1) is driven by a motor. The trolley body travels at a speed of 10 meters per minute. The power input is 380V power. The operation of the trolley body, electric hoist, and motor winding mechanism (4) can all be controlled remotely.

4. The bridge deck anti-collision guardrail construction trolley according to claim 1, characterized in that; The columns and beams can be made of 250 or 280 type I-beams; the beams are 6 meters long and the columns are 3.8 meters high.

5. A construction method for a bridge deck crash barrier construction trolley according to claim 1, characterized in that; It has the following operations; I. Pre-construction preparation stage; Equipment debugging and counterweight configuration; check the motor drive system of the traveling trolley body (1) to ensure that the remote control signals of the trolley body, electric hoist (8), and motor winding mechanism (4) are stable; select the loading weight of the counterweight box (5) according to the weight of the template in this construction - if the template weight is ≤1.5 tons, load the single counterweight box to 1.2 tons, and the two sets together to 2.4 tons; if the template weight is >1.5 tons, load the single counterweight box to 2.4 tons, and the two sets together to 4.8 tons. Hang the counterweight box at the inner end of the crossbeam and calibrate the center of gravity of the equipment with a level to avoid the center of gravity shifting. After the construction workers enter the construction basket (6) and fasten their safety ropes, they remotely operate the electric hoist (8) at the bottom of the crossbeam and slowly lower the chain. At this time, the movable folding bracket (7) gradually straightens from the initial bent state until the bottom of the basket is flush with the top of the guardrail template. After the movable folding bracket is fully straightened, it forms a stable support. The electric hoist braking device is turned off, and the position of the basket is locked. II. Implementation of construction procedures; (a) Formwork hoisting and installation Template lifting and positioning: Remote control operation of the traveling trolley (3) on the crossbeam, control the motor winding mechanism (4) to lower the hook, manually assist in firmly connecting the hook to the anti-collision guardrail template, remote control motor winding mechanism (4) to wind up and lift the template, and at the same time adjust the horizontal position of the template through the traveling trolley (3) so that the template moves to the top of the construction axis; Precise template alignment: Slowly lower the template to the predetermined position of the guardrail foundation. Construction workers assist in calibrating the verticality of the template at the edge of the bridge deck. When the template position deviation is ≤3mm, fix the bottom connector of the template. Repeat the above steps to complete the hoisting and splicing of adjacent templates. The splicing joints are treated with sealant to prevent concrete leakage. Concrete pouring construction: Align the lower end of the concrete discharge pipe (10) with the inlet of the first section of the formwork in advance, and use clips to fix the connection between the discharge pipe and the formwork; fix the concrete receiving hopper (9) between the two crossbeams using the bracket to ensure that the bottom outlet of the receiving hopper is sealed to the discharge pipe to prevent concrete leakage. Start the concrete pump truck and pump the well-mixed concrete for the crash barrier into the receiving hopper (9). After being buffered by the receiving hopper, the concrete is injected into the inner cavity of the formwork through the discharge pipe (10) at a uniform speed. During the pouring process, the workers in the basket use a vibrator to vibrate the concrete to ensure that the concrete is dense. When the concrete is poured to the design elevation of the top of the formwork, stop pumping, close the discharge pipe valve, and scrape the concrete surface at the top of the formwork. After the concrete is poured, it is cured according to the specifications. After the curing period, the motor winding mechanism (4) is remotely operated to connect the hook to the top lifting point of the template and slowly lift the template. At the same time, the workers in the basket assist in separating the template from the concrete guardrail. After the template is removed, it is moved to the designated stacking area on the bridge deck. After the template is removed, the electric hoist (8) is remotely controlled to lift the construction basket (6). At this time, the movable folding bracket (7) gradually bends from the straight state until the basket rises to the bottom of the crossbeam. Then the remotely controlled traveling trolley (1) moves to the next section of the guardrail construction position at a speed of 10 meters / minute, repeating the "template hoisting-pouring-removal" process until the entire bridge deck anti-collision guardrail construction is completed. After the formwork is hoisted and demolded, the workers use grinding tools to grind the inner surface of the formwork to ensure that the inner surface of the formwork is smooth. At the same time, they check the sealing of the formwork joints. If the sealant is found to be detached, it is applied in time. After the grinding is completed, the bridge deck personnel are notified by remote control to prepare for the concrete pouring stage.

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