A highway bearing capacity test detection device

Abstract

The utility model provides a kind of highway bearing capacity test detection device, including frame, manual jack is installed in frame top, handle for driving manual jack elongation is rotatably installed in manual jack top, pressure gauge for showing the pressure in the inside of manual jack is installed in manual jack top, crossbeam is installed in the movable end of manual jack, pressure head seat is installed in the lower surface of crossbeam, plug rail is installed in the lower surface of pressure head seat, plug rail is arranged in parallel with crossbeam, the lower side of pressure head seat is equipped with multiple for pressing hold concrete core sample triangular head, triangular head upper surface is provided with slot, plug rail penetrates slot, the utility model has the beneficial effects as follows: without abandoning integral extrusion position, greatly reduce material waste, reduce equipment maintenance cost and consumable loss.

Description

Technical Field

[0001] This utility model is a highway bearing capacity testing device, belonging to the field of highway engineering testing. Background Technology

[0002] In the load-bearing capacity testing of rigid highway pavements (cement concrete pavements), the core splitting test is the core method for evaluating the strength of pavement concrete. The procedure involves drilling a complete cylindrical concrete core sample from the pavement, placing the sample between the extrusion sections of a press, and applying longitudinal compressive force to the core sample by driving the extrusion sections downwards using a hydraulic cylinder until the core sample splits and fails. The maximum load at this point is recorded, and the splitting strength of the concrete is calculated to determine whether the pavement's load-bearing capacity meets design requirements. To accommodate the testing needs of concrete core samples of different sizes and lengths, the extrusion sections of the press are typically designed with a relatively long structure. This ensures that regardless of the core sample size, the placement of the core sample on the extrusion section can be adjusted to achieve uniform stress, thus guaranteeing the accuracy of the test data.

[0003] Because the contact between the concrete core sample and the extrusion section during testing is concentrated only in the central area of ​​the extrusion section, the extrusion force of each splitting test is concentrated on this area. After long-term repeated use, the central area of ​​the extrusion section will suffer severe wear due to continuous high-pressure friction, resulting in decreased surface smoothness and even dents. Meanwhile, the edges and other non-contact areas of the extrusion section, not participating in the actual extrusion, experience minimal wear and largely maintain their original structural state. When the central area wears to a certain extent, it leads to uneven stress on the core sample, affecting the accuracy of the test results. At this point, the entire extrusion section must be replaced. However, during replacement, the severely worn central area cannot be replaced individually; the entire long extrusion section must be discarded. This results in the loss of even the still intact edge parts, causing significant material waste and increasing the maintenance costs and consumable consumption of the testing equipment. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a highway bearing capacity testing device to solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a highway bearing capacity testing device, comprising: The frame has a support piece installed at the lower end to support the concrete core sample; A manual jack is mounted on the top of the frame. A handle for extending the manual jack is rotatably mounted on the top of the manual jack. A pressure gauge for displaying the internal pressure of the manual jack is also mounted on the top of the manual jack. A crossbeam is installed on the movable end of a manual jack. A pressure head seat is installed on the lower surface of the crossbeam, and a rail is installed on the lower surface of the pressure head seat. The rail is arranged parallel to the crossbeam. Multiple triangular heads for holding concrete core samples are provided on the lower side of the pressure head seat. Slots are opened on the upper surface of the triangular heads, and the rail passes through the slots.

[0006] Furthermore, the slot has a T-shaped cross-section, and the rail has a T-shaped cross-section.

[0007] Furthermore, the lifting component includes a base frame, the lower end of the frame is fitted with the base frame, a side plate is fitted on one side of the upper surface of the base frame, the side plate is connected and fixed to the frame, a lifting plate is hinged to the upper surface of the side plate, and a plurality of evenly arranged support members are fitted on the side of the base frame away from the side plate to switch the lifting plate between a horizontal state and an inclined state.

[0008] Furthermore, the support includes a base plate, on the side of the base frame away from the side plate, and a plurality of straight threaded cylinders are evenly installed on the upper surface of the base plate. The straight threaded cylinders are internally threaded with threaded posts, the upper end of the threaded posts is in contact with the bottom of the lifting plate, and a handle is installed on the upper part of the outer surface of the threaded posts.

[0009] Furthermore, the upper surface of the base plate is provided with multiple fixing holes, and the multiple fixing holes are alternately arranged with multiple straight threaded cylinders.

[0010] Furthermore, both ends of the crossbeam are provided with guide rails, which are arranged vertically and are fixedly connected to the frame. The side of the guide rail facing the crossbeam is provided with vertically arranged dovetail grooves, and both ends of the crossbeam are equipped with dovetail tenons, which are inserted into the dovetail grooves.

[0011] Furthermore, a reinforcing rib is fixedly connected to the upper end of the guide rail, and both ends of the reinforcing rib are fixedly connected to the frame.

[0012] Furthermore, two insert rods are installed on the upper surface of the pressure head seat, and two insertion holes are opened on the upper surface of the crossbeam. The two insert rods are respectively inserted into the two insertion holes, and the pressure head seat is connected to the crossbeam by multiple sets of screws.

[0013] Furthermore, a top seat is installed on the top of the manual jack, and the top seat is connected and fixed to the frame.

[0014] The beneficial effects of this utility model are: Multiple independent triangular heads are used as the core extrusion components, replacing the traditional one-piece long-size extrusion structure. During the test, only the triangular heads are in contact with the concrete core sample. When a single triangular head wears due to concentrated force, it can be directly disassembled and replaced individually without discarding the entire extrusion part, which greatly reduces material waste and lowers equipment maintenance costs and consumable consumption.

[0015] The triangular head slides into the slot and the insertion rail of the pressure head seat, making installation and disassembly convenient. The installation position of the triangular head can be adjusted according to the core sample specifications, or triangular heads with different degrees of wear can be replaced, so that the unworn triangular heads can continue to be used, further improving the utilization rate of components and avoiding resource waste. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a highway bearing capacity testing device according to the present invention; Figure 2 This is another perspective view of the highway bearing capacity testing device of this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is an exploded structural diagram of the triangular head, pressure head seat, and crossbeam in a highway bearing capacity testing device of this utility model; In the picture: 1. Framework; 2. Manual jack; 21. Jack base; 22. Pressure gauge; 23. Handle; 3. Crossbeam; 31. Guide rail; 32. Reinforcing rib; 33. Dovetail tenon; 34. Dovetail groove; 4. Screws; 5. Base frame; 51. Support plate; 52. Side plate; 53. Base plate; 54. Straight threaded cylinder; 55. Threaded column; 56. Handle; 6. Pressure head base; 61. Insertion rail; 62. Triangular head; 63. Insertion rod; 64. Slot. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figure 1 and Figure 2This utility model provides a technical solution: a highway bearing capacity testing device, including a frame 1, a bottom frame 5 installed at the lower end of the frame 1, a side plate 52 installed on one side of the upper surface of the bottom frame 5, the side plate 52 being connected and fixed to the frame 1, and a lifting plate 51 hinged to the upper surface of the side plate 52; a bottom plate 53 is installed on the side of the bottom frame 5 away from the side plate 52, a plurality of straight threaded cylinders 54 are evenly installed on the upper surface of the bottom plate 53, a threaded post 55 is internally threaded to the straight threaded cylinder 54, the upper end of the threaded post 55 is in contact with the bottom of the lifting plate 51, and a handle 56 is installed at the upper part of the outer surface of the threaded post 55; a plurality of fixing holes are opened on the upper surface of the bottom plate 53, and the plurality of fixing holes and the plurality of straight threaded cylinders 54 are alternately arranged. The lifting plate 51 is hinged to the side plate 52 and supported by the threaded column 55 to ensure the stability of the core sample. The threaded column 55 is rotated by the handle 56 to retract into the straight threaded cylinder 54. At this time, the lifting plate 51 is in an inclined state, which makes it easy for the debris generated by the core sample to slide off the lifting plate 51 quickly.

[0019] See Figure 1 and Figure 2 The manual jack 2 has a top seat 21 installed on top, which is connected and fixed to the frame 1. A handle 23 for extending the manual jack 2 is rotatably mounted on the top of the manual jack 2, and a pressure gauge 22 for displaying the internal pressure of the manual jack 2 is also installed on the top of the manual jack 2. The manual jack 2, driven by the handle 23, can control the extrusion rate and pressure. The pressure gauge 22 displays the pressure value in real time, allowing the operator to adjust the loading force according to the core sample's condition. The real-time pressure value displayed by the pressure gauge 22 provides data for highway bearing capacity testing.

[0020] See Figure 1 , Figure 2 and Figure 4 The crossbeam 3 is installed at the movable end of the manual jack 2. Both ends of the crossbeam 3 are equipped with guide rails 31, which are arranged vertically and are connected and fixed to the frame 1. The upper end of the guide rail 31 is connected and fixed with a reinforcing rib 32, and both ends of the reinforcing rib 32 are connected and fixed to the frame 1 to improve the stability of the guide rail 31 installation. The side of the guide rail 31 facing the crossbeam 3 has a vertically arranged dovetail groove 34. Both ends of the crossbeam 3 are equipped with dovetail tenons 33, which are inserted into the dovetail groove 34. When the manual jack 2 drives the crossbeam 3 to move, the crossbeam 3 drives the dovetail tenons 33 to slide along the dovetail groove 34, which plays a guiding and limiting role.

[0021] See Figures 1-4A pressure head seat 6 is installed on the lower surface of the crossbeam 3. Two insert rods 63 are installed on the upper surface of the pressure head seat 6. Two insertion holes are opened on the upper surface of the crossbeam 3. The two insert rods 63 are respectively inserted into the two insertion holes. Then, the pressure head seat 6 is connected to the crossbeam 3 by multiple sets of screws 4, which facilitates the quick alignment and connection between the pressure head seat 6 and the crossbeam 3. An insert rail 61 is installed on the lower surface of the pressure head seat 6. The insert rail 61 is arranged parallel to the crossbeam 3. Multiple triangular heads 62 for pressing concrete core samples are provided on the lower side of the pressure head seat 6. A slot 64 is opened on the upper surface of the triangular head 62. The insert rail 61 with a cross-section of "T" passes through the slot 64 with a cross-section of "T". Multiple independent triangular heads 62 are used as the core extrusion components, replacing the traditional one-piece long-length extrusion structure. During the test, only the triangular head 62 is in contact with the concrete core sample. When a single triangular head 62 wears due to concentrated force, it can be directly disassembled and replaced individually without discarding the entire extrusion part, which greatly reduces material waste and lowers equipment maintenance costs and consumable consumption. The triangular head 62 slides with the insertion rail 61 of the pressure head seat 6 through the slot 64, which is convenient for installation and disassembly. The installation position of the triangular head 62 can be adjusted according to the core sample specifications, or triangular heads 62 with different degrees of wear can be replaced, so that the unworn triangular heads 62 can continue to be used, further improving the utilization rate of components and avoiding resource waste.

[0022] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A highway bearing capacity testing device, characterized in that, include: The frame (1) has a support piece installed at the lower end to support the concrete core sample; A manual jack (2) is installed on the top of the frame (1). The top of the manual jack (2) is rotatably equipped with a handle (23) for driving the extension of the manual jack (2). The top of the manual jack (2) is equipped with a pressure gauge (22) for displaying the internal pressure of the manual jack (2). A crossbeam (3) is installed at the movable end of a manual jack (2). A pressure head seat (6) is installed on the lower surface of the crossbeam (3). A rail (61) is installed on the lower surface of the pressure head seat (6). The rail (61) is arranged parallel to the crossbeam (3). A plurality of triangular heads (62) for pressing concrete core samples are provided on the lower side of the pressure head seat (6). A slot (64) is opened on the upper surface of the triangular head (62). The rail (61) passes through the slot (64).

2. The highway bearing capacity testing device according to claim 1, characterized in that: The slot (64) has a "T" shaped cross-section, and the rail (61) has a "T" shaped cross-section.

3. The highway bearing capacity testing device according to claim 1, characterized in that: The lifting component includes a base frame (5), the lower end of the frame (1) is fitted with a base frame (5), a side plate (52) is fitted on one side of the upper surface of the base frame (5), the side plate (52) is connected and fixed to the frame (1), a lifting plate (51) is hinged to the upper surface of the side plate (52), and a plurality of evenly arranged support members are fitted on the side of the base frame (5) away from the side plate (52) to switch the lifting plate (51) between a horizontal state and an inclined state.

4. The highway bearing capacity testing device according to claim 3, characterized in that: The support includes a base plate (53). The base plate (53) is installed on the side of the base frame (5) away from the side plate (52). A plurality of straight threaded cylinders (54) are evenly installed on the upper surface of the base plate (53). The straight threaded cylinders (54) are internally threaded with threaded columns (55). The upper end of the threaded column (55) is in contact with the bottom of the lifting plate (51). A handle (56) is installed on the upper part of the outer surface of the threaded column (55).

5. The highway bearing capacity testing device according to claim 4, characterized in that: The upper surface of the base plate (53) is provided with multiple fixing holes, and the multiple fixing holes are arranged alternately with multiple straight threaded cylinders (54).

6. The highway bearing capacity testing device according to claim 1, characterized in that: The crossbeam (3) has guide rails (31) at both ends. The guide rails (31) are arranged vertically and are connected and fixed to the frame (1). The side of the guide rail (31) facing the crossbeam (3) has vertically arranged dovetail tenons (34). The crossbeam (3) has dovetail tenons (33) at both ends and the dovetail tenons (33) are inserted into the dovetail tenons (34).

7. The highway bearing capacity testing device according to claim 6, characterized in that: The upper end of the guide rail (31) is connected and fixed with a reinforcing rib (32), and both ends of the reinforcing rib (32) are connected and fixed to the frame (1).

8. The highway bearing capacity testing device according to claim 1, characterized in that: Two insert rods (63) are installed on the upper surface of the pressure head seat (6), and two insertion holes are opened on the upper surface of the crossbeam (3). The two insert rods (63) are respectively inserted into the two insertion holes. The pressure head seat (6) is connected to the crossbeam (3) by multiple sets of screws (4).

9. The highway bearing capacity testing device according to claim 1, characterized in that: The manual jack (2) is equipped with a top seat (21) on top, and the top seat (21) is connected and fixed to the frame (1).

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