High performance concrete pavement slab load bearing capacity testing structure

Abstract

This utility model relates to the technical field of road slabs and discloses a high-performance concrete road slab load-bearing capacity testing structure, including a gantry frame and a fixed platform. Two pressure-bearing base bars are provided on the fixed platform. A movable beam that moves vertically is provided on the gantry frame, and an actuator is provided on the movable beam. A reaction plate is connected to the bottom of the actuator. A lifting frame is installed in the internal cavity. Two symmetrically arranged guide pulleys are installed on the top of the lifting frame, and a lifting drive is connected to the bottom of the lifting frame. Elastic buffer columns are installed on both sides of the bottom of the lifting frame. A rigid support frame is formed by the gantry frame and the fixed platform. The pressure-bearing base bars define the pressure-bearing area, achieving precise positioning of the road slab specimen. The movable beam drives the actuator to apply vertical pressure to the reaction plate, simulating real load conditions. The lifting frame is embedded in the pressure-bearing base bars, and the guide pulleys enable horizontal sliding of the specimen. The lifting drive adjusts the height of the specimen, significantly reducing the intensity of manual handling and avoiding damage from impacts.

Description

Technical Field

[0001] This utility model relates to the technical field of road slabs, and more specifically, to a high-performance concrete road slab load-bearing capacity testing structure. Background Technology

[0002] With the development of prefabricated building technology, prefabricated road slabs are increasingly widely used in road engineering. Prefabricated road slabs offer advantages such as high construction efficiency, stable quality control, and convenient disassembly and maintenance, thus attracting widespread attention in the fields of rapid construction and repair. However, after production, a three-point load-bearing capacity test should be conducted on the same batch of road slabs; otherwise, when subjected to enormous loads during use, problems such as road slab breakage and deformation may occur, significantly impacting the quality of the road project and potentially leading to accidents.

[0003] Traditional concrete slab load-bearing capacity testing equipment often suffers from problems such as low testing accuracy, unstable specimen fixation, inability to effectively simulate actual support conditions, inconvenient operation, or safety hazards. In particular, for testing large-size, high-strength road slabs, existing equipment is difficult to meet the requirements of safety, accuracy, and efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a high-performance concrete road slab load-bearing capacity testing structure, aiming to solve the problem of the lack of efficient testing of road slab load-bearing capacity in the existing technology.

[0005] This utility model discloses a high-performance concrete road slab load-bearing capacity testing structure, comprising a gantry frame and a fixed platform. The bottom of the gantry frame is fixed across both sides of the fixed platform. The fixed platform is provided with two pressure-bearing base strips, which are spaced apart to form a pressure-bearing area. A movable beam that moves up and down is provided on the gantry frame, and an actuator is provided on the movable beam. A reaction plate is connected to the bottom of the actuator and is located above the pressure-bearing area. Each pressure-bearing base strip has an internal cavity, in which a lifting frame is installed. Two symmetrically arranged guide pulleys are installed on the top of the lifting frame, and a lifting drive is connected to the bottom of the lifting frame. Elastic buffer columns are installed on both sides of the bottom of the lifting frame.

[0006] Furthermore, the top of the pressure-bearing base strip has a guide opening communicating with the internal cavity, the guide pulley is located in the guide opening, the guide pulley is fitted with a rubber sleeve, and the surface of the rubber sleeve is provided with anti-slip texture.

[0007] Furthermore, the pressure-bearing base strip extends along the width direction of the fixed platform, and the top of the pressure-bearing base strip is provided with anti-slip texture.

[0008] Furthermore, the actuator includes an electro-hydraulic servo valve, which is connected to the reaction plate via a piston rod. A load sensor is connected to the piston rod, and a displacement sensor is connected to the electro-hydraulic servo valve.

[0009] Furthermore, the gantry includes two symmetrically arranged columns, the tops of the two columns are fixedly connected by a crossbeam, the bottoms of the two columns are respectively welded to the two sides of the fixed platform, and the inner sides of the two columns have vertical track grooves formed by relatively opposite recesses. The two ends of the moving beam and the two ends of the reaction plate are respectively inserted into the two vertical track grooves.

[0010] Furthermore, the movable beam is located on an I-shaped structure, and a hydraulic actuator is connected to the movable beam.

[0011] Furthermore, the movable beam and the reaction plate are arranged vertically at relative intervals.

[0012] Furthermore, a folding baffle is installed on the fixed platform. When the folding baffle is installed vertically on the fixed platform, the height of the folding baffle is higher than that of the pressure-bearing base strip.

[0013] Furthermore, hydraulic diagonal supports are installed on both sides of the folding baffle.

[0014] Furthermore, audible and visual alarms are installed on both sides of the movable beam, and the alarm threshold can be programmed.

[0015] Compared with existing technologies, the high-performance concrete road slab load-bearing capacity testing structure provided by this utility model forms a rigid support frame through a gantry and a fixed platform, and the pressure-bearing base strip defines the pressure-bearing area to achieve precise positioning of the road slab specimen; the moving beam drives the actuator and the reaction plate to apply vertical pressure, simulating real load conditions; the pressure-bearing base strip is embedded with a lifting frame, which realizes the horizontal sliding of the specimen through guide pulleys, and the lifting drive adjusts the height of the specimen, greatly reducing the intensity of manual handling and avoiding damage to the specimen from bumps; it integrates loading, positioning and conveying functions into one, improving testing efficiency; and solves the problem of lacking efficient testing of road slab load-bearing capacity. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the high-performance concrete road slab bearing capacity testing structure provided by this utility model;

[0017] Figure 2 This is a frontal sectional view of the high-performance concrete road slab bearing capacity testing structure provided by this utility model.

[0018] Figure 3 This is a side view schematic diagram of the high-performance concrete road slab bearing capacity testing structure provided by this utility model.

[0019] In the diagram: gantry frame 10, fixed platform 20, pressure-bearing base strip 30, moving beam 40, actuator 50, reaction plate 60, column 11, crossbeam 12, vertical track groove 13, hydraulic actuator 14, folding baffle 21, hydraulic diagonal support 22, internal cavity 31, lifting frame 32, guide pulley 33, lifting actuator 34, elastic buffer column 35, audible and visual alarm 41, electro-hydraulic servo valve 51, piston rod 52, displacement sensor 53, load sensor 54. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] Reference Figure 1-3 The image shown is a preferred embodiment of the present invention.

[0024] A high-performance concrete road slab load-bearing capacity testing structure includes a gantry frame 10 and a fixed platform 20. The bottom of the gantry frame 10 is fixed across both sides of the fixed platform 20. The fixed platform 20 is provided with two pressure-bearing base strips 30, which are spaced apart to form a pressure-bearing area. The gantry frame 10 is provided with a vertically movable beam 40, and an actuator 50 is provided on the movable beam 40. The bottom of the actuator 50 is connected to a reaction plate 60, which is located above the pressure-bearing area. The pressure-bearing base strips 30 have an internal cavity 31, and a lifting frame 32 is installed in the internal cavity 31. Two symmetrically arranged guide pulleys 33 are installed on the top of the lifting frame 32, and a lifting drive 34 is connected to the bottom of the lifting frame 32. Elastic buffer columns 35 are installed on both sides of the bottom of the lifting frame 32.

[0025] The high-performance concrete road slab load-bearing capacity testing structure provided above forms a rigid support frame through the gantry 10 and the fixed platform 20. The pressure-bearing base strip 30 defines the pressure-bearing area, achieving precise positioning of the road slab specimen. The moving beam 40 drives the actuator 50 and the reaction plate 60 to apply vertical pressure, simulating real load conditions. The pressure-bearing base strip 30 has an embedded lifting frame 32, which enables the specimen to slide horizontally through the guide pulley 33. The lifting drive 34 adjusts the height of the specimen, greatly reducing the intensity of manual handling and avoiding damage to the specimen. It integrates loading, positioning, and conveying functions into one, improving testing efficiency and solving the problem of lacking efficient testing of road slab load-bearing capacity.

[0026] Overall layout and load-bearing capacity: The gantry 10 spans the fixed platform 20 to provide a stable top support frame, and the fixed platform 20 provides a solid bottom foundation; the two pressure-bearing bases 30 form a stable pressure-bearing area for placing the concrete road slab to be tested, simulating actual support conditions.

[0027] Force application system: The initial height of actuator 50 is adjusted by moving the moving beam 40 up and down. Actuator 50 drives reaction plate 60 to apply load downward, thereby loading the road slab placed on the pressure area.

[0028] Specimen Movement and Protection: The design of the lifting frame 32 inside the pressure base strip 30 is a key innovation. The lifting frame 32 can be raised and lowered under the action of the lifting drive 34. The guide pulley 33 at the top of the frame can provide rolling support when the test point of the road slab needs to be changed, which greatly reduces the frictional resistance during the process of pushing the road slab, improves the moving efficiency of the road slab, saves the handling time, and effectively prevents the surface of large-sized and heavy road slabs from being scratched and damaged during the movement. After the road slab is moved into place, the lifting frame 32 descends, and the road slab is stably placed on the upper surface of the pressure base strip 30 for testing. The elastic buffer column 35 can increase the stability of the lifting frame 32 when it moves up and down.

[0029] Overall effect: This structure enables safe and convenient placement and positioning of large road slabs, and provides a stable and reliable basic platform for subsequent precise loading tests.

[0030] In this embodiment, the top of the pressure-bearing base strip 30 has a guide opening that communicates with the internal cavity 31. The guide pulley 33 is located in the guide opening, and a rubber sleeve is fitted on the guide pulley 33. The surface of the rubber sleeve is provided with anti-slip texture.

[0031] The guide opening provides a precise lifting trajectory for the guide pulley 33, ensuring that the lifting frame 32 moves smoothly.

[0032] Anti-slip and protection: The rubber sleeve and anti-slip texture on the surface of the guide roller 33 significantly increase the friction between the roller and the bottom surface of the road slab. This ensures that the road slab can move smoothly with the roller during lifting and lowering, and effectively prevents the road slab from falling or becoming misaligned due to accidental slippage during placement. The rubber sleeve also has a cushioning effect, further protecting the bottom surface of the road slab.

[0033] In this embodiment, the pressure-bearing base strip 30 extends along the width direction of the fixed platform 20, and the top of the pressure-bearing base strip 30 is provided with anti-slip texture.

[0034] Support stability: The bearing base strip 30 extending along the width direction of the fixed platform 20 provides long-distance linear support for the road slab, which conforms to the actual stress characteristics of the road slab.

[0035] Anti-horizontal displacement: The anti-slip textured design on the top of the bearing base strip 30 effectively increases the static friction between the bottom of the road slab and the supporting surface, ensuring that the road slab will not slide horizontally on the bearing base strip 30 during large-tonnage load-bearing capacity tests, thus guaranteeing the accuracy of load transfer and the reliability of test results.

[0036] In this embodiment, the actuator 50 includes an electro-hydraulic servo valve 51, which is connected to the reaction plate 60 via a piston rod 52. A load sensor 54 is connected to the piston rod 52, and a displacement sensor 53 is connected to the electro-hydraulic servo valve 51.

[0037] The core components and sensing functions of actuator 50 are defined.

[0038] Precision loading control: The actuator 50 driven by the electro-hydraulic servo valve 51, especially in combination with the piston rod 52, can provide high-precision and high-response load application capability, and achieve precise control of loading rate and load size.

[0039] Real-time data acquisition: Load sensor 54 directly monitors the load value applied to the road slab, while displacement sensor 53 accurately measures the deformation (settlement) of the road slab under load; the combination of the two realizes real-time, dynamic, and high-precision data acquisition and feedback control of the loading process, providing core data support for accurately assessing the bearing capacity of the road slab (such as ultimate load, deformation modulus, etc.).

[0040] In this embodiment, the gantry frame 10 includes two symmetrically arranged columns 11. The tops of the two columns 11 are fixedly connected by a crossbeam 12. The bottoms of the two columns 11 are respectively welded to the two sides of the fixed platform 20. The inner sides of the two columns 11 have vertical track grooves 13 formed by relatively opposite recesses. The two ends of the moving beam 40 and the two ends of the reaction plate 60 are respectively inserted into the two vertical track grooves 13.

[0041] Structural strength and rigidity: The gantry frame 10, consisting of symmetrical columns 11 and top beam 12, is welded and fixed at the bottom, providing extremely high overall structural strength and rigidity, and can withstand huge reaction forces without significant deformation or instability.

[0042] Precision guidance: The vertical track groove 13 on the inner side of the column 11 provides precise, stable, and low-friction vertical movement guidance for both ends of the moving beam 40 and the reaction plate 60. This plug-in connection method effectively limits the lateral swaying and torsion of the moving beam 40 and the reaction plate 60 during the loading process, ensuring that the load is always applied vertically to the road slab, which greatly improves the testing accuracy and equipment stability.

[0043] In this embodiment, the movable beam 40 is located on an I-shaped structure, and a hydraulic actuator 14 is connected to the movable beam 40.

[0044] Bending strength: The I-beam structure of the movable beam 40 has superior bending strength and stiffness, which can resist bending deformation when bearing the weight of the actuator 50 and the reaction plate 60 and when applying loads, ensuring the smoothness and verticality of the reaction plate 60 movement.

[0045] High-efficiency drive: The hydraulic actuator 14 provides strong, smooth and controllable power for the lifting of the moving beam 40, and facilitates quick adjustment of the height of the actuator 50 to accommodate road slabs of different thicknesses, thereby improving operating efficiency.

[0046] In this embodiment, the movable beam 40 and the reaction plate 60 are arranged vertically at relative intervals.

[0047] The vertically spaced arrangement ensures that the actuator 50 (especially the piston rod 52) has sufficient extension and retraction space, while also avoiding structural interference between the moving beam 40 and the reaction plate 60 during movement, thus ensuring the safety and smooth operation of the equipment. This layout also facilitates the installation of the load sensor 54 and the accurate measurement of data.

[0048] In this embodiment, a folding baffle 21 is installed on the fixed platform 20. When the folding baffle 21 is vertically installed on the fixed platform 20, the height of the folding baffle 21 is higher than that of the pressure-bearing base strip 30.

[0049] Safety protection: The vertically installed folding baffle 21 forms a physical barrier. Its height is higher than that of the bearing base strip 30, which can effectively block the splashing of concrete fragments that may occur when the road slab reaches its ultimate bearing capacity and undergoes brittle failure, thus protecting the safety of operators and surrounding equipment; and it is used to limit the range of movement of the road slab during the three-point test to prevent the road slab from falling.

[0050] Space-saving design: The baffle is foldable and can be stored away when not in use, saving storage and transportation space and improving the practicality and convenience of the equipment.

[0051] In this embodiment, hydraulic inclined supports 22 are installed on both sides of the folding baffle 21.

[0052] The hydraulic diagonal support 22 provides strong lateral support for the folding baffle 21 in the vertical working state, significantly enhancing the overall rigidity and impact resistance of the baffle; when the road slab suddenly breaks and causes violent splashing, the diagonal support can effectively prevent the baffle from tipping over or deforming due to impact, ensuring the reliability of the protective function.

[0053] In this embodiment, audible and visual alarms 41 are installed on both sides of the movable beam 40, and the alarm threshold can be programmed.

[0054] The audible and visual alarms 41 installed on both sides of the moving beam 40, together with the programmable alarm thresholds, can monitor and warn of abnormal states in real time during the test process; for example, when the load detected by the load sensor 54 exceeds the preset safety threshold (which may overload and damage the equipment or road slab), an alarm is triggered.

[0055] An alarm will sound when the deformation detected by displacement sensor 53 exceeds the preset limit or abnormal value.

[0056] An alarm will sound when the hydraulic system pressure is abnormal.

[0057] This function effectively improves the safety monitoring level of the testing process, reminds operators to intervene in a timely manner, and avoids equipment damage or safety accidents; the programmable settings make it flexible to be applied to the testing standards and safety requirements of different specifications of road slabs.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-performance concrete road slab load-bearing capacity testing structure, characterized in that, The device includes a gantry frame and a fixed platform. The bottom of the gantry frame is fixed across both sides of the fixed platform. The fixed platform has two pressure-bearing base bars, which are spaced apart to form a pressure-bearing area. The gantry frame has a vertically movable beam, and the movable beam has an actuator. The bottom of the actuator is connected to a reaction plate, which is located above the pressure-bearing area. The pressure-bearing base bars have an internal cavity, in which a lifting frame is installed. The top of the lifting frame has two symmetrically arranged guide pulleys, and the bottom of the lifting frame is connected to a lifting drive. Elastic buffer columns are installed on both sides of the bottom of the lifting frame.

2. The high-performance concrete road slab bearing capacity testing structure as described in claim 1, characterized in that, The top of the pressure-bearing base strip has a guide opening that communicates with the internal cavity. The guide pulley is located in the guide opening and is fitted with a rubber sleeve. The surface of the rubber sleeve is provided with anti-slip texture.

3. The high-performance concrete road slab bearing capacity testing structure as described in claim 2, characterized in that, The pressure-bearing base strip extends along the width of the fixed platform, and the top of the pressure-bearing base strip is provided with anti-slip texture.

4. The high-performance concrete road slab bearing capacity testing structure as described in claim 3, characterized in that, The actuator includes an electro-hydraulic servo valve, which is connected to a reaction plate via a piston rod. A load sensor is connected to the piston rod, and a displacement sensor is connected to the electro-hydraulic servo valve.

5. The high-performance concrete road slab bearing capacity testing structure as described in claim 4, characterized in that, The gantry frame includes two symmetrically arranged columns. The tops of the two columns are fixedly connected by a crossbeam. The bottoms of the two columns are welded to the two sides of the fixed platform, respectively. The inner sides of the two columns have vertical track grooves formed by oppositely recessed grooves. The two ends of the moving beam and the two ends of the reaction plate are respectively inserted into the two vertical track grooves.

6. The high-performance concrete road slab bearing capacity testing structure as described in claim 5, characterized in that, The movable beam is located on an I-shaped structure, and a hydraulic actuator is connected to the movable beam.

7. The high-performance concrete road slab bearing capacity testing structure as described in claim 6, characterized in that, The movable beam and the reaction plate are arranged vertically at relative intervals.

8. The high-performance concrete road slab bearing capacity testing structure as described in any one of claims 1 to 7, characterized in that, A folding baffle is installed on the fixed platform. When the folding baffle is installed vertically on the fixed platform, the height of the folding baffle is higher than that of the pressure-bearing base strip.

9. The high-performance concrete road slab bearing capacity testing structure as described in claim 8, characterized in that, Hydraulic diagonal supports are installed on both sides of the folding baffle.

10. The high-performance concrete road slab bearing capacity testing structure as described in any one of claims 1 to 7, characterized in that, Audible and visual alarms are installed on both sides of the movable beam, and the alarm threshold can be programmed.

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