A wheeled uHPC bridge deck paver and paving process

Abstract

This invention discloses a wheeled UHPC bridge deck paver, comprising a frame, a traveling mechanism, a material trough, a vibration mechanism, a leveling mechanism, a longitudinal bridge-direction membrane covering mechanism, and an automatic paving thickness adjustment mechanism. The traveling mechanism is located on both sides of the frame. The material trough is formed by a front baffle plate, left and right side plates, and a rear baffle plate. The two ends of the rear baffle plate are respectively attached to the left and right side plates and slide vertically with them. The vibration mechanism is used to vibrate the concrete in the material trough. The leveling mechanism includes a leveling plate, a leveling vibration motor, a leveling plate transmission beam, and a precision leveling beam. The automatic paving thickness adjustment mechanism is used to detect the paving thickness in real time and adjust the paving thickness by adjusting the position of the leveling plate. The longitudinal bridge-direction membrane covering mechanism includes a membrane covering mounting bracket and membrane covering rollers mounted on the membrane covering mounting bracket. This invention integrates material placement, paving, leveling, and membrane covering into one unit, improving construction efficiency and reducing construction costs. This invention also provides the paving process of this paver.

Description

Technical Field

[0001] This invention belongs to the field of construction engineering technology, specifically relating to a wheeled UHPC bridge deck paver and a UHPC bridge deck paving process. Background Technology

[0002] Ultra-high performance concrete (UHPC) possesses superior mechanical properties, durability, toughness, wear resistance, blast resistance, and impact resistance. As a bridge deck pavement, UHPC significantly improves the overall stiffness of the bridge deck, especially for steel bridges, greatly reducing the likelihood of fatigue failure in orthotropic bridge decks under long-term heavy loads. Currently, this material is being used more and more widely in orthotropic bridge deck pavements.

[0003] Currently, in the construction of UHPC bridge deck paving, concrete is generally pumped onto the pouring surface using concrete pump trucks, and then manually smoothed and leveled after pouring. This method is inefficient, labor-intensive, and produces poor results. In recent years, with continuous technological advancements, mechanized construction has emerged to replace manual labor. Equipment such as concrete placing booms, leveling machines, and mulching machines are used to complete the paving of ultra-high performance concrete. However, the numerous pieces of equipment and complex procedures involved pose certain risks to the stability of on-site construction quality, making the construction complex and inconvenient, while also increasing equipment and labor costs. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a wheeled UHPC bridge deck paver with a high degree of automation and integration and good construction effect.

[0005] The present invention provides a wheeled UHPC bridge deck paver, comprising a frame, a traveling mechanism, a material trough, a vibrating mechanism, a leveling mechanism, a longitudinal bridge-direction film covering mechanism, and an automatic paving thickness adjustment mechanism;

[0006] The frame includes a crossbeam and longitudinal beams fixedly installed at both ends of the crossbeam;

[0007] The walking mechanism is located on both sides of the frame, including a walking wheel bracket connected to the frame and walking wheels mounted on the walking wheel bracket;

[0008] The material trough is a through trough arranged along the width of the bridge deck and open at the top and bottom. It is surrounded by a front baffle plate, left and right side plates and a rear baffle plate. The front baffle plate and left and right side plates are fixedly connected to the frame. The bottom of the front baffle plate, left side plate and right side plate are close to the bridge deck. The two ends of the rear baffle plate are respectively attached to the left and right side plates and slide vertically with them.

[0009] The vibration mechanism is installed inside the material trough and is used to vibrate the concrete stored in the material trough.

[0010] The leveling mechanism includes a leveling plate, a leveling vibration motor, a leveling plate transmission beam, and a precision leveling beam. The leveling plate is located at the bottom rear side of the rear baffle and is connected to the rear baffle as a whole. The bottom surface of the leveling plate is flush with the bottom surface of the rear baffle. The leveling vibration motor is mounted on the leveling plate. A vertical opening is provided in the upper part of the leveling plate. The lower part of the leveling plate transmission beam is movably placed in the opening. The upper part of the leveling plate transmission beam is fixedly connected to the longitudinal beam. The longitudinal beam drives the leveling plate and the rear baffle to move in the front-back direction through the leveling plate transmission beam. The precision leveling beam is located between the traveling wheel and the longitudinal bridge coating mechanism. It includes a precision leveling plate and a precision leveling beam vibration motor. The precision leveling plate is suspended on the coating mounting bracket through an elastic connector. The rear bottom edge of the precision leveling plate is parallel to the bridge surface. The precision leveling beam vibration motor is mounted on the precision leveling plate.

[0011] The automatic paving thickness adjustment mechanism includes a slab leveling cylinder, a frame adjustment cylinder, a paving thickness measuring device, and an intelligent controller. At least four slab leveling cylinders are provided and arranged on the front and rear sides of the slab leveling cylinder, one end of which is connected to the slab leveling cylinder and the other end to the frame, used to adjust the distance of the slab leveling cylinder from the bridge deck. At least four frame adjustment cylinders are provided and arranged on the left and right sides of the frame, one end of which is connected to the frame and the other end to the traveling mechanism, used to adjust the height of the frame from the bridge deck. At least two paving thickness measuring devices are provided and arranged... Located on the left and right rear sides of the paving plate, it includes a suspension bracket, a miniature detection cylinder, a cylinder stroke measuring device, and a detection needle. The miniature detection cylinder is mounted on the rear side of the paving plate via the suspension bracket. The piston rod end of the miniature detection cylinder is connected to the detection needle. The cylinder stroke measuring device is mounted on the piston rod end of the miniature detection cylinder and is used to measure the working stroke of the piston rod of the miniature detection cylinder and send the measurement data to the intelligent controller. The intelligent controller is connected to the paving thickness measuring device via an information transmission cable and controls the paving plate adjusting cylinder and the frame adjusting cylinder to move according to the received signal.

[0012] The longitudinal bridge coating mechanism includes a coating mounting bracket connected to the frame and a coating roller mounted on the coating mounting bracket.

[0013] Furthermore, the lower part of the rear baffle is provided with a plow-shaped shovel that extends forward at an angle.

[0014] Furthermore, the two end faces of the rear baffle are provided with grooves, and elastic sealing strips are embedded in the grooves, so that the rear baffle is in close contact with the left and right side walls through the elastic sealing strips.

[0015] Furthermore, the walking mechanism also includes a drive unit, which is a drive motor that is connected to the walking wheel drive, or the drive unit is a tractor connected to the frame.

[0016] Furthermore, the cylinder stroke measuring device is a sliding length measuring ruler or a non-contact length measuring ruler, which is equipped with an instant data transmission module.

[0017] Furthermore, the detection needle is conical with a pointed tip at its lower end.

[0018] Furthermore, the vibration mechanism includes a vibration beam, a vibration motor, and a vibration beam swing adjustment cylinder. The vibration beam is elastically connected to a mounting plate located at the opening above the material trough, and the vibration beam extends into the material trough. The vibration motor is fixed on the vibration beam. One end of the vibration beam swing adjustment cylinder is hinged to the mounting plate, and the other end is hinged to the vibration beam.

[0019] Furthermore, a vertical adjustment device for vertically adjusting the position of the precision leveling beam is provided between the precision leveling beam and the film-coated mounting bracket.

[0020] Furthermore, the wheeled UHPC bridge deck paver includes two or more segments, each segment including an independent crossbeam, trough, vibrating mechanism, leveling mechanism, and longitudinal bridge-direction covering mechanism, and adjacent segments are fastened together by bolts.

[0021] The present invention also provides a paving process for the wheeled UHPC bridge deck paver, which includes the following steps:

[0022] (1) Add UHPC wet material into the material trough through the feeding facility, place the wet curing film on the film covering roller of the longitudinal bridge film covering mechanism, adjust the rear edge of the elastic leveling plate to be parallel to the cross section of the bridge deck, and the distance between the plate and the bridge deck is equal to the paving thickness, start the walking mechanism to drive the UHPC bridge deck paver forward.

[0023] (2) Start the vibration mechanism and the leveling vibration motor. As the UHPC bridge deck paver moves forward, the UHPC wet material flows from the trough to the bridge deck and is leveled by the leveling plate.

[0024] (3) Check the actual thickness of the laid UHPC concrete and confirm that the thickness of the laid UHPC concrete is qualified. Otherwise, readjust the position of the slab. After it is normal, enter the normal working mode of laying UHPC concrete.

[0025] (4) When the UHPC bridge deck paver moves forward, the paving thickness measuring device starts to detect the thickness of the paved UHPC concrete in real time. At the same time, the actual thickness of the paved UHPC concrete is manually checked and compared to confirm that the UHPC concrete thickness data detected by the intelligent paving thickness detection device in real time is correct. Otherwise, the intelligent paving thickness detection device is recalibrated. After it is normal, the paving UHPC concrete thickness is automatically adjusted. The intelligent controller controls the movement of the plate adjustment cylinder and the frame adjustment cylinder according to the thickness data detected in real time at the preset detection frequency. When the data measured by the intelligent paving thickness detection devices on the left and right sides deviates from the paving thickness at the same time, it is determined that the bridge deck is uneven. The plate adjustment cylinder is controlled to adjust the level. When the data measured by the intelligent paving thickness detection device on one side is normal and the data measured on the other side deviates from the paving thickness, it is determined that the road surface is uneven. The corresponding frame adjustment cylinder is controlled to adjust the level, so that the concrete paving thickness is controlled at the set value.

[0026] (5) When the UHPC bridge deck paver moves forward, the precision leveling beam precisely levels the defects such as the indentation of the traveling wheel on the surface of the laid UHPC concrete; after the UHPC bridge deck paver moves forward a certain distance, the wet curing film placed on the film-covering roller is torn open and placed on the surface of the laid UHPC concrete. As the system moves forward, the wet curing film follows and is relatively fixed by the adhesive force of the film on the surface of the laid UHPC concrete, so that the roll wet curing film can be automatically opened longitudinally to cover the surface of the UHPC concrete.

[0027] (6) Control the UHPC bridge deck paver to advance at a uniform speed to complete the preset bridge deck paving, vibration, leveling and film covering.

[0028] Furthermore, the UHPC concrete paving thickness detection method of the paving thickness measuring device includes:

[0029] (1) Manually measure the actual distance between the rear edge of the paving slab and the bridge deck or road surface to be paved, and adjust the lifting and adjusting cylinder of the paving slab so that the distance is equal to the paving thickness setting value;

[0030] (2) Start the micro detection cylinder, so that the piston rod of the micro detection cylinder extends and drives the detection needle to move downward until the detection needle touches the bridge surface or road surface. The oil pressure in the micro detection cylinder rises to the set value, and the hydraulic system connected to the micro detection cylinder automatically stops supplying pressure oil to the micro detection cylinder. At this time, the pressure value of the micro detection cylinder chamber matches the minimum qualified detection pressure value specified by the system. Set the data value measured by the cylinder stroke measuring device at this time as the standard value of paving thickness. Then the micro detection cylinder resets.

[0031] (3) During the working and walking process of the paver, the intelligent controller controls the micro detection cylinder to perform detection according to the set frequency command, and compares the measured value with the standard value of paving thickness. When the measured value error is greater than the sum of the set thickness allowable error and the diameter of the pre-paved steel bars, the measured value is determined to be unqualified and is measured again. If the value is still unqualified, the paver will move a certain distance back and forth and then automatically detect again until it meets the requirements. If the qualified data cannot be obtained after multiple consecutive measurements, an alarm signal will be issued and manual adjustment will be required.

[0032] (4) The qualified measured data obtained from the test are transmitted to the intelligent controller in real time as the real-time dynamic data for adjusting the paving thickness of the paving equipment. After the intelligent controller is judged by the preset program, the corresponding actuator is instructed to adjust the vertical position of the slab.

[0033] The beneficial effects of this invention are as follows:

[0034] (1) The wheeled UHPC bridge deck paver of the present invention integrates material laying, paving, leveling and film covering into one unit. One machine can complete the entire paving process, which is convenient to use and greatly improves construction efficiency and reduces construction costs.

[0035] (2) The wheeled UHPC bridge deck paver of the present invention can adjust the height of the slab by detecting the paving thickness in real time, thereby avoiding uneven paving surface due to uneven bridge deck during the paving process and improving the overall paving quality.

[0036] (3) The wheeled UHPC bridge deck paver of the present invention adopts a multi-segment combination method, which can increase or decrease the segments as needed to meet the paving of bridge decks of different widths, thus improving its applicability. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the wheeled UHPC bridge deck paver of the present invention.

[0038] Figure 2 This is a schematic diagram of the structure of one segment of the wheeled UHPC bridge deck paver of the present invention.

[0039] Figure 3 This is a schematic diagram of the cross-section of the wheeled UHPC bridge deck paver of the present invention.

[0040] Figure 4 This is a schematic diagram of the rear baffle of the wheeled UHPC bridge deck paver of the present invention.

[0041] Figure 5 This is a schematic diagram of the paving thickness measuring device of the wheeled UHPC bridge deck paver of the present invention.

[0042] In the diagram: First frame 1, crossbeam 1-1, longitudinal beam 1-2;

[0043] Walking mechanism 2, walking wheel bracket 2-1, walking wheel 2-2, drive motor 2-3;

[0044] 3. Material trough, 3-1. Front baffle plate, 3-2. Side plate, 3-3. Rear baffle plate, 3-4. Plow-shaped shovel, 3-5. Groove.

[0045] 4. Vibration mechanism; 4-1. Vibration beam; 4-2. Vibration motor; 4-3. Vibration beam swing adjustment cylinder; 4-4. Mounting plate;

[0046] Leveling mechanism 5, leveling plate 5-1, leveling vibration motor 5-2, leveling plate transmission beam 5-3, precision leveling beam 5-4, precision leveling plate 5-4-1, precision leveling beam vibration motor 5-4-2;

[0047] Longitudinal bridge laminating mechanism 6, laminating mounting bracket 6-1, laminating roller 6-2;

[0048] Automatic paving thickness adjustment mechanism 7, flat plate adjustment cylinder 7-1, frame adjustment cylinder 7-2;

[0049] 8. Paving thickness measuring device, 8-1. Suspension bracket, 8-2. Miniature detection cylinder, 8-3. Cylinder stroke measuring device, 8-4. Detection needle. Detailed Implementation

[0050] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0051] like Figures 1-5 As shown, a wheeled UHPC bridge deck paver of this embodiment includes a frame 1, a traveling mechanism 2, a material trough 3, a vibrating mechanism 4, a leveling mechanism 5, a longitudinal bridge-direction film covering mechanism 6, and an automatic paving thickness adjustment mechanism 7.

[0052] The frame 1 includes a crossbeam 1-1 and longitudinal beams 1-2 that are fixedly installed at both ends of the crossbeam 1-1.

[0053] The traveling mechanism 2 is located on both sides of the frame 1, including a traveling wheel bracket 2-1 connected to the frame 1 and traveling wheels 2-2 mounted on the traveling wheel bracket 2-1. A drive motor 2-3, which is pulsatorically connected to the traveling wheels 2-2, is also fixedly mounted on the traveling wheel bracket 2-1. Alternatively, the vehicle can be connected to the frame 1 for traction.

[0054] The material trough 3 is a through trough arranged along the width of the bridge deck and open at both ends. It is formed by a front baffle plate 3-1, left and right side plates 3-2, and a rear baffle plate 3-3. The front baffle plate 3-1 and left and right side plates 3-2 are fixedly connected to the frame 1. The bottoms of the front baffle plate 3-1, left side plate 3-2, and right side plate 3-2 are close to the bridge deck. The two ends of the rear baffle plate 3-3 are respectively attached to the left and right side plates 3-2 and slide vertically with them. To prevent concrete leakage from the material trough 3, grooves 3-5 are provided on both ends of the rear baffle plate 3-3. Elastic sealing strips are embedded in the grooves 3-5, and the rear baffle plate 3-3 is in close contact with the walls of the left and right side plates 3-2 through the elastic sealing strips. To improve the material placement and paving effect, a plow-shaped shovel 3-4 extending forward is provided at the lower part of the rear baffle plate 3-3.

[0055] The vibration mechanism 4 is disposed within the material trough 3 and is used to vibrate the concrete stored in the material trough 3. In this embodiment, the vibration mechanism 4 includes a vibration beam 4-1, a vibration motor 4-2, and a vibration beam swing adjustment cylinder 4-3. The vibration beam 4-1 is elastically connected to the mounting plate 4-4 located at the opening above the material trough 3, and the vibration beam 4-1 extends into the material trough 3. The vibration motor 4-2 is fixed to the vibration beam 4-1. One end of the vibration beam swing adjustment cylinder 4-3 is hinged to the mounting plate 4-4, and the other end is hinged to the vibration beam 4-1.

[0056] The leveling mechanism 5 includes a leveling plate 5-1, a leveling vibration motor 5-2, a leveling plate transmission beam 5-3, and a precision leveling beam 5-4. The leveling plate 5-1 is located at the rear bottom of the rear baffle 3-3 and is connected to the rear baffle 3-3 as a whole. The bottom surface of the leveling plate 5-1 is flush with the bottom surface of the rear baffle 3-3. The leveling vibration motor 5-2 is mounted on the leveling plate 5-1. A vertical opening is provided in the upper part of the leveling plate 5-1. The lower part of the leveling plate transmission beam 5-3 is movably placed in the opening. The upper part of the leveling plate transmission beam 5-3 is connected to the longitudinal beam 1-2. A fixed connection is established, with the longitudinal beam 1-2 driving the leveling plate 5-1 and the rear baffle 3-3 to move forward and backward via the leveling plate transmission beam 5-3. The precision leveling beam 5-4 is positioned between the traveling wheel 2-2 and the longitudinal bridge-direction coating mechanism 6, and includes a precision leveling plate 5-4-1 and a precision leveling beam vibration motor 5-4-2. The precision leveling plate 5-4-1 is suspended on the coating mounting bracket 6-1 via an elastic connector, and its rear bottom edge is parallel to the bridge surface. The precision leveling beam vibration motor 5-4-2 is mounted on the precision leveling plate 5-4-1. To facilitate adjustment of the leveling height, a vertical adjustment device is provided between the precision leveling beam 5-4 and the coating mounting bracket 6-1 for vertically adjusting the position of the precision leveling beam 5-4.

[0057] The automatic paving thickness adjustment mechanism 7 includes a flatbed adjustment cylinder 7-1, a frame adjustment cylinder 7-2, a paving thickness measuring device 8, and an intelligent controller. At least four flatbed adjustment cylinders 7-1 are provided and arranged on the front and rear sides of the flatbed 5-1, with one end connected to the flatbed 5-1 and the other end connected to the frame 1, used to adjust the distance of the flatbed 5-1 from the bridge surface. At least four frame adjustment cylinders 7-2 are provided and arranged on the left and right sides of the frame 1, with one end connected to the frame 1 and the other end connected to the traveling mechanism 2, used to adjust the height of the frame 1 from the bridge surface. At least two paving thickness measuring devices 8 are provided and arranged on the left, right, and rear sides of the flatbed 5-1, including suspension components. The system comprises a bracket 8-1, a miniature detection cylinder 8-2, a cylinder stroke measuring device 8-3, and a detection needle 8-4. The miniature detection cylinder 8-2 is mounted on the rear side of the paving plate 5-1 via the suspension bracket 8-1. The piston rod end of the miniature detection cylinder 8-2 is connected to the detection needle 8-4. The cylinder stroke measuring device 8-3 is mounted on the piston rod end of the miniature detection cylinder 8-2 and is used to measure the working stroke of the piston rod. It can be a sliding length measuring ruler or a non-contact length measuring ruler and is equipped with an instant data transmission module to send the measurement data to the intelligent controller. The detection needle 8-4 is conical with a pointed lower end to avoid errors caused by the detection needle being too large and touching bridge deck reinforcement or other objects. The intelligent controller is connected to the paving thickness measuring device 8-1 via an information transmission cable and controls the operation of the paving plate adjusting cylinder 7-1 and the frame adjusting cylinder 7-2 based on the received signals.

[0058] The longitudinal bridge coating mechanism 6 includes a coating mounting bracket 6-1 connected to the frame 1 and a coating roller 6-2 disposed on the coating mounting bracket 6-1.

[0059] To adapt to the construction needs of different bridge deck widths, this wheeled UHPC bridge deck paver includes two or more segments. Each segment includes an independent crossbeam 1-1, material trough 3, vibration mechanism 4, leveling mechanism 5, and longitudinal bridge-direction membrane covering mechanism 6. Adjacent segments are fastened together by bolts, so that segments can be added or reduced as needed to meet the paving needs of bridge decks of different widths.

[0060] The present invention also provides a paving process for the wheeled UHPC bridge deck paver, which includes the following steps:

[0061] (1) Add UHPC wet material into the trough through the feeding facility, place the wet curing film on the film-coating roller 6-2 of the longitudinal bridge film-coating mechanism 6, adjust the elastic leveling plate 5-1 so that it is parallel to the cross section of the bridge deck and the distance between it and the bridge deck is equal to the paving thickness, start the walking mechanism to drive the UHPC bridge deck paver forward.

[0062] (2) Start the vibration mechanism and the leveling vibration motor 5-2. While the UHPC bridge deck paver moves forward, the UHPC wet material flows from the trough to the bridge deck and is leveled by the leveling plate 5-1.

[0063] (3) Check the actual thickness of the laid UHPC concrete and confirm that the thickness of the laid UHPC concrete is qualified. Otherwise, readjust the position of the leveling plate 5-1. After it is normal, enter the normal working mode of laying UHPC concrete.

[0064] (4) When the UHPC bridge deck paver moves forward, the paving thickness measuring device 8 starts to detect the thickness of the paved UHPC concrete in real time. At the same time, the actual thickness of the paved UHPC concrete is manually checked and compared to confirm that the UHPC concrete thickness data detected by the paving thickness intelligent detection device in real time is correct. Otherwise, the paving thickness intelligent detection device is recalibrated. After it is normal, the paving UHPC concrete thickness is automatically adjusted. The intelligent controller controls the action of the plate adjustment cylinder 7-1 and the frame adjustment cylinder 7-2 according to the thickness data detected in real time at the preset detection frequency. When the data measured by the paving thickness intelligent detection devices on the left and right sides deviates from the paving thickness at the same time, it is determined that the bridge deck is uneven. The plate adjustment cylinder 7-1 is controlled to adjust the level. When the data measured by the paving thickness intelligent detection device on one side is normal and the data measured on the other side deviates from the paving thickness, it is determined that the road surface is uneven. The corresponding side frame adjustment cylinder 7-2 is controlled to adjust the level, so that the concrete paving thickness is controlled at the set value.

[0065] (5) When the UHPC bridge deck paver moves forward, the precision leveling beam 5-4 precisely levels the defects such as the indentation of the walking wheel 2-2 on the surface of the laid UHPC concrete; after the UHPC bridge deck paver moves forward a certain distance, the wet curing film placed on the film-covering roller 6-2 is torn open and placed on the surface of the laid UHPC concrete. As the system moves forward, the wet curing film follows and is relatively fixed by the adhesive force of the film on the surface of the laid UHPC concrete, so that the roll wet curing film can be automatically opened longitudinally to cover the surface of the UHPC concrete.

[0066] (6) Control the UHPC bridge deck paver to advance at a uniform speed to complete the preset bridge deck paving, vibration, leveling and film covering.

[0067] Specifically, the method for detecting the UHPC concrete paving thickness using the paving thickness measuring device 8 includes:

[0068] (1) Manually measure the actual distance between the rear edge of the paving slab 5-1 and the bridge surface or road surface to be paved, and adjust the lifting adjustment cylinder 5-4 of the paving slab 5-1 so that the distance is equal to the paving thickness setting value;

[0069] (2) Start the micro detection cylinder 8-2, so that the piston rod of the micro detection cylinder 8-2 extends and drives the detection needle 8-4 to move downward until the detection needle 8-4 touches the bridge surface or road surface. The oil pressure in the micro detection cylinder 8-2 rises to the set value. The hydraulic system connected to the micro detection cylinder 8-2 automatically stops supplying pressure oil to the micro detection cylinder 8-2. At this time, the pressure value of the chamber of the micro detection cylinder 8-2 matches the minimum qualified detection pressure value specified by the system. Set the data value measured by the cylinder stroke measuring device 8-3 at this time as the standard value of paving thickness. Then the micro detection cylinder 8-2 resets.

[0070] (3) During the working and walking process of the paver, the intelligent controller controls the micro detection cylinder 8-2 to perform detection according to the set frequency command, and compares the measured value with the standard value of paving thickness. When the measured value error is greater than the sum of the set thickness allowable error and the diameter of the pre-paved steel bars, the measured value is determined to be unqualified and is measured again. If the value is still unqualified, the paver will move a certain distance back and forth and then automatically detect again until it meets the requirements. If the qualified data cannot be obtained after multiple consecutive measurements, an alarm signal will be issued and manual adjustment will be required.

[0071] (4) The qualified measured data obtained from the test are transmitted to the intelligent controller in real time as the real-time dynamic data for adjusting the paving thickness of the paving equipment. After the intelligent controller is judged by the preset program, the corresponding actuator is instructed to adjust the vertical position of the slab.

[0072] With the aid of the teachings present in the foregoing description and related drawings, those skilled in the art will conceive of many modifications and other embodiments of the invention. Therefore, it is to be understood that the invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are considered to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a general and descriptive sense only and are not intended to be limiting.

Claims

1. A wheeled UHPC bridge deck paver, characterized in that: Includes frame (1), walking mechanism (2), material trough (3), vibrating mechanism (4), leveling mechanism (5), longitudinal bridge film covering mechanism (6), and automatic paving thickness adjustment mechanism (7); The frame (1) includes a crossbeam (1-1) and longitudinal beams (1-2) located at both ends of the crossbeam (1-1); The walking mechanism (2) is located on both sides of the frame (1), including a walking wheel bracket (2-1) connected to the frame (1) and a walking wheel (2-2) mounted on the walking wheel bracket (2-1). The material trough (3) is a through trough arranged along the width of the bridge deck and open at the top and bottom. It is surrounded by a front baffle plate (3-1), left and right side plates (3-2), and a rear baffle plate (3-3). The front baffle plate (3-1) and left and right side plates (3-2) are fixedly connected to the frame (1). The bottom of the front baffle plate (3-1), left side plate (3-2), and right side plate (3-2) are close to the bridge deck. The two ends of the rear baffle plate (3-3) are respectively attached to the left and right side plates (3-2) and slide vertically with them. The vibrating mechanism (4) is installed in the material trough (3) and is used to vibrate the concrete stored in the material trough (3). The leveling mechanism (5) includes a leveling plate (5-1), a leveling vibration motor (5-2), a leveling plate transmission beam (5-3), and a precision leveling beam (5-4). The leveling plate (5-1) is located at the bottom rear side of the rear baffle (3-3) and is connected to the rear baffle (3-3) as a whole. The bottom surface of the leveling plate (5-1) is flush with the bottom surface of the rear baffle (3-3). The leveling vibration motor (5-2) is mounted on the leveling plate (5-1). A vertical opening is provided in the upper part of the leveling plate (5-1). The lower part of the leveling plate transmission beam (5-3) is movably placed in the opening. The upper part of the leveling plate transmission beam (5-3) is connected to the longitudinal beam (1- 2) Fixed connection, the longitudinal beam (1-2) drives the platen (5-1) and the rear baffle (3-3) to move in the front and rear directions through the platen transmission beam (5-3); the precision leveling beam (5-4) is set between the traveling wheel (2-2) and the longitudinal bridge coating mechanism (6), including the precision leveling plate (5-4-1) and the precision leveling beam vibration motor (5-4-2). The precision leveling plate (5-4-1) is suspended on the coating mounting bracket (6-1) through the elastic connector. The rear bottom edge line of the precision leveling plate (5-4-1) is parallel to the bridge surface. The precision leveling beam vibration motor (5-4-2) is installed on the precision leveling plate (5-4-1). The automatic paving thickness adjustment mechanism (7) includes a plate adjustment cylinder (7-1), a frame adjustment cylinder (7-2), a paving thickness measuring device (8), and an intelligent controller. At least four plate adjustment cylinders (7-1) are provided and arranged on the front and rear sides of the plate (5-1), with one end connected to the plate (5-1) and the other end connected to the frame (1), used to adjust the distance of the plate (5-1) from the bridge surface. At least four frame adjustment cylinders (7-2) are provided and arranged on the left and right sides of the frame (1), with one end connected to the frame (1) and the other end connected to the traveling mechanism (2), used to adjust the height of the frame (1) from the bridge surface. At least two paving thickness measuring devices (8) are provided and arranged on the plate (5-1). 5-1) The left and right rear sides include a suspension bracket (8-1), a miniature detection cylinder (8-2), a cylinder stroke measuring device (8-3), and a detection needle (8-4). The miniature detection cylinder (8-2) is installed on the rear side of the whole plate (5-1) through the suspension bracket (8-1). The piston rod end of the miniature detection cylinder (8-2) is connected to the detection needle (8-4). The cylinder stroke measuring device (8-3) is installed on the piston rod end of the miniature detection cylinder (8-2) and is used to measure the working stroke of the piston rod of the miniature detection cylinder (8-2) and send the measurement data to the intelligent controller. The intelligent controller is connected to the paving thickness measuring device (8) and controls the action of the whole plate adjusting cylinder (7-1) and the frame adjusting cylinder (7-2) according to the received signal. The longitudinal bridge coating mechanism (6) includes a coating mounting bracket (6-1) connected to the frame (1) and a coating roller (6-2) disposed on the coating mounting bracket (6-1).

2. The wheeled UHPC bridge deck paver according to claim 1, characterized in that: The lower part of the rear baffle plate (3-3) is provided with a plow-shaped shovel (3-4) that extends forward at an angle.

3. The wheeled UHPC bridge deck paver according to claim 1, characterized in that: The rear baffle plate (3-3) has grooves (3-5) on both end faces, and elastic sealing strips are embedded in the grooves (3-5). The rear baffle plate (3-3) is in close contact with the walls of the left and right side plates (3-2) through the elastic sealing strips.

4. A wheeled UHPC bridge deck paver according to claim 1, characterized in that: The walking mechanism (2) further includes a drive unit, which is a drive motor (2-3) that is connected to the walking wheel (2-2) in a transmission, or the drive unit is a tractor connected to the frame (1).

5. A wheeled UHPC bridge deck paver according to claim 1, characterized in that: The cylinder stroke measuring device (8-3) is a sliding length measuring ruler or a non-contact length measuring ruler, and it is equipped with an instant data transmission module.

6. A wheeled UHPC bridge deck paver according to claim 1, characterized in that: The detection needle (8-4) is conical with a pointed tip at the bottom.

7. A wheeled UHPC bridge deck paver according to claim 1, characterized in that: The vibration mechanism (4) includes a vibration beam (4-1), a vibration motor (4-2), and a vibration beam swing adjustment cylinder (4-3). The vibration beam (4-1) is elastically connected to the mounting plate (4-4) located at the opening above the material trough (3), and the vibration beam (4-1) extends into the material trough (3). The vibration motor (4-2) is fixed on the vibration beam (4-1). One end of the vibration beam swing adjustment cylinder (4-3) is hinged to the mounting plate (4-4), and the other end is hinged to the vibration beam (4-1).

8. A wheeled UHPC bridge deck paver according to claim 1, characterized in that: A vertical adjustment device for vertically adjusting the position of the precision leveling beam (5-4) is provided between the precision leveling beam (5-4) and the film-coated mounting bracket (6-1).

9. A wheeled UHPC bridge deck paver according to any one of claims 1-8, characterized in that: The wheeled UHPC bridge deck paver consists of two or more segments, each of which includes an independent crossbeam (1-1), a trough (3), a vibrating mechanism (4), a leveling mechanism (5), and a longitudinal bridge-direction film covering mechanism (6). Adjacent segments are fastened together by bolts.

10. The paving process of a wheeled UHPC bridge deck paver, characterized in that, Including the UHPC bridge deck paver according to any one of claims 1-9, the paving process includes the following steps: (1) Add UHPC wet material into the trough through the feeding facility, place the wet curing film on the film-coating roller (6-2) of the longitudinal bridge film-coating mechanism (6), adjust the rear edge of the elastic leveling plate (5-1) to be parallel to the cross section of the bridge deck, and the distance between it and the bridge deck is equal to the paving thickness. Start the walking mechanism to drive the UHPC bridge deck paver forward. (2) Start the vibration mechanism and the leveling vibration motor (5-2). As the UHPC bridge deck paver moves forward, the UHPC wet material flows from the trough to the bridge deck and is leveled by the leveling plate (5-1). (3) Check the actual thickness of the laid UHPC concrete and confirm that the thickness of the laid UHPC concrete is qualified. Otherwise, readjust the position of the leveling plate (5-1). After it is normal, enter the normal working mode of laying UHPC concrete. (4) When the UHPC bridge deck paver is moving forward, the paving thickness measuring device (8) starts to detect the thickness of the paved UHPC concrete in real time. At the same time, the actual thickness of the paved UHPC concrete is manually checked and compared to confirm that the UHPC concrete thickness data detected by the intelligent paving thickness detection device in real time is correct. Otherwise, the intelligent paving thickness detection device is recalibrated. After it is normal, the paving UHPC concrete thickness automatic adjustment working mode is entered. The intelligent controller controls the adjustment of the whole plate according to the thickness data detected in real time at the preset detection frequency. When the hydraulic cylinder (7-1) and the frame adjustment cylinder (7-2) are activated, if the data measured by the intelligent detection device for paving thickness on both the left and right sides deviates from the paving thickness at the same time, it is determined that the bridge surface is uneven. The leveling cylinder (7-1) is controlled to adjust the surface. If the data measured by the intelligent detection device for paving thickness on one side is normal and the data measured on the other side deviates from the paving thickness, it is determined that the road surface is uneven. The corresponding frame adjustment cylinder (7-2) is controlled to adjust the surface, thereby controlling the concrete paving thickness to the set value. (5) When the UHPC bridge deck paver moves forward, the precision leveling beam (5-4) precisely levels the indentation defects of the walking wheel (2-2) on the surface of the laid UHPC concrete; after the UHPC bridge deck paver moves forward a certain distance, the wet curing film placed on the film-covering roller (6-2) is torn open and placed on the surface of the laid UHPC concrete. As the system moves forward, the wet curing film follows and is relatively fixed by the adhesive force of the film on the surface of the laid UHPC concrete, so that the roll wet curing film can be automatically opened longitudinally to cover the surface of the UHPC concrete. (6) Control the UHPC bridge deck paver to advance at a uniform speed to complete the preset bridge deck paving, vibration, leveling and film covering.

11. The paving process according to claim 10, characterized in that: The method for detecting the UHPC concrete paving thickness using the paving thickness measuring device (8) includes: (1) Manually measure the actual distance between the rear edge of the paving slab (5-1) and the bridge surface or road surface to be paved, and adjust the paving slab adjusting cylinder (7-1) to make the distance equal to the paving thickness setting value; (2) Start the micro detection cylinder (8-2) to extend the piston rod of the micro detection cylinder (8-2) and drive the detection needle (8-4) to move downward until the detection needle (8-4) touches the bridge surface or road surface. The oil pressure in the micro detection cylinder (8-2) rises to the set value. The hydraulic system connected to the micro detection cylinder (8-2) automatically stops supplying pressure oil to the micro detection cylinder (8-2). At this time, the pressure value in the chamber of the micro detection cylinder (8-2) matches the minimum qualified detection pressure value specified by the system. Set the data value measured by the cylinder stroke measuring device (8-3) at this time as the standard value of paving thickness. Then the micro detection cylinder (8-2) resets. (3) During the working and walking process of the paver, the intelligent controller controls the micro detection cylinder (8-2) to carry out detection according to the set frequency command, and compares the measured value with the standard value of paving thickness. When the measured value error is greater than the sum of the set thickness allowable error and the diameter of the pre-paved steel bar, the measured value is determined to be unqualified and is measured again. If the value is still unqualified, the paver will move a certain distance back and forth and then automatically detect again until it meets the requirements. If the qualified data cannot be obtained after multiple consecutive measurements, an alarm signal will be issued and manual adjustment will be required. (4) The qualified measured data obtained from the test are transmitted to the intelligent controller in real time as the real-time dynamic data for adjusting the paving thickness of the paving equipment. After the intelligent controller is judged by the preset program, the corresponding actuator is instructed to adjust the vertical position of the slab.

Images