Device for detecting compactness of highway subgrade

Abstract

The utility model discloses a highway subgrade compactness detection device, belongs to the technical field of highway subgrade compactness detection devices, and solves the problems of high labor cost and low measurement efficiency caused by the fact that constructors need to lift a Beckman beam to move in the prior art. The device comprises a beam rod, a foot stool, a supporting rod and a measuring rod which are arranged on the beam rod, a measuring structure which is matched with the measuring rod and is provided with a measuring meter, a movable frame and a fixed structure which is arranged on the movable frame, the sliding block is arranged on the beam rod and is in longitudinal sliding fit with the movable frame; and the hanging piece is arranged on the beam rod and is in fixed or separated fit with the fixed structure. The highway subgrade compaction degree detection device is used for highway subgrade compaction degree detection.

Description

Technical Field

[0001] A device for detecting the compaction degree of highway subgrade, which is used for detecting the compaction degree of highway subgrade and belongs to the technical field of devices for detecting the compaction degree of highway subgrade. Background Technique

[0002] The deflection detection of highway subgrade is a method for evaluating the deformation performance of highway subgrade under the action of vehicle loads. This detection is usually used to evaluate the bearing capacity and stability of newly built or existing highway subgrades.

[0003] The detection steps are as follows:

[0004] Select the test location, ensure that the road surface is dry, clean, and free of debris. The test area should usually be on the wheel track, which is the place that bears the maximum load and deformation.

[0005] Apply a standard axle load (usually a device simulating wheel load) on the road surface.

[0006] Use a Benkelman beam for measurement. The Benkelman beam is a simple mechanical device. By placing a movable tripod on the road surface and hanging a long rod between the tripod and the load point, there is a scale on the rod that can read the displacement. After the load is applied, read the displacement of the rod, which is the deflection value.

[0007] Record the deflection value and calculate the deflection coefficient or stiffness index of the road surface.

[0008] According to the test results, evaluate the bearing capacity and performance of the subgrade. The smaller the deflection value, the harder the subgrade and the stronger the bearing capacity.

[0009] There are some differences in the selection of the length of the Benkelman beam in different regions. The length of the Benkelman beam mainly has two specifications: one is 3.6 meters long, with the front and rear arms being 2.4 meters and 1.2 meters respectively; the other is the lengthened 5.4 meters, with the front and rear arms being 3.6 meters and 1.8 meters respectively.

[0010] When measuring on a semi-rigid base asphalt pavement or a cement concrete pavement, a Benkelman beam deflectometer with a length of 5.4 meters is usually used and is used in conjunction with a BZZ-100 standard vehicle. This is because the longer Benkelman beam can better adapt to the characteristics of these road surfaces and provide more accurate deflection measurement results. While on a flexible base asphalt pavement or a mixed structure asphalt pavement, a Benkelman beam deflectometer with a length of 3.6 meters can be used and a BZZ-60 standard vehicle is adopted.

[0011] The existing Benkelman beam has the following technical problems:

[0012] It needs to be carried and moved by construction workers, resulting in high labor costs and low measurement efficiency. Content of the Utility Model

[0013] The purpose of the present utility model is to provide a device for detecting the compaction degree of highway subgrade, so as to solve the problems in the prior art that construction workers need to carry the Benkelman beam to move, resulting in high labor costs and low measurement efficiency.

[0014] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0015] A device for detecting the compaction degree of highway subgrade includes a beam rod, a tripod, a support rod and a measuring rod arranged on the beam rod, and a measuring structure with a measuring table cooperating with the measuring rod, including a moving frame, a fixing structure arranged on the moving frame, a sliding block arranged on the beam rod and longitudinally slidingly cooperating with the moving frame, and a hanging part arranged on the beam rod and fixedly or detachably cooperating with the fixing structure.

[0016] Furthermore, the moving frame includes four pairs of corresponding supporting feet, pulleys arranged on the supporting feet, horizontal transverse connecting rods connected to one side of the top and bottom of the supporting feet, and a horizontal longitudinal connecting rod connected to one side of the top of the supporting feet;

[0017] Chutes cooperating with the sliding block are arranged on the opposite sides of the supporting feet located on both sides of the horizontal transverse connecting rod.

[0018] Furthermore, a T-shaped groove is arranged on the horizontal longitudinal connecting piece;

[0019] The fixing structure includes a "┚"-shaped piece arranged on the horizontal longitudinal connecting piece, a reset spring and a slider connected to the reset spring are arranged in the T-shaped groove, and the "┚"-shaped piece is connected to the slider.

[0020] Furthermore, the hanging part includes a connecting rod connected to the beam rod and a buckle with a hanging hole connected to the connecting rod.

[0021] Furthermore, a buffer part A cooperating with the buckle with a hanging hole is arranged on the "┚"-shaped piece, and a buffer part B cooperating with the "┚"-shaped piece is arranged on the horizontal longitudinal connecting piece.

[0022] Furthermore, the buffer part A and the buffer part B are respectively a rubber pad, foam or a buffer structure with a spring.

[0023] Furthermore, the "┚"-shaped piece includes a horizontal plate and a vertical plate. One side of the top of the vertical plate is an inclined surface that is outward and downward inclined, and one side of the bottom surface is an inclined surface that is outward and upward inclined.

[0024] Compared with the prior art, the advantages of the present utility model are as follows:

[0025] 1. In the present utility model, by arranging the beam rod on the moving frame, when measurement is required, the hanging part is removed from the fixed structure, so that the tripod and the support rod contact the ground, and the measurement structure with the measuring instrument can perform the detection of the compaction degree of the highway subgrade. Conversely, when the hanging part is hung on the fixed structure, the tripod and the support rod are separated from the ground, and the beam rod can be quickly moved, thus eliminating the need for construction workers to carry it, reducing the high labor cost and improving the measurement efficiency.

[0026] 2. In the present utility model, the moving frame is slidably engaged with the sliding block through the chute to perform sliding limit on the beam rod, and the beam rod is driven by the pulley to move. Its structure is simple and convenient for movement.

[0027] 3. The fixed structure in the present utility model is matched with the T-shaped groove on the horizontal longitudinal connecting piece, aiming to facilitate the application of pressing force to the "┚"-shaped part, so that the slider presses the compression spring to contract, and thus the hanging part can move upward without being affected by the "┚"-shaped part. When reaching the appropriate position, releasing the pressure can make the compression spring reset, and the hanging part can be hung on the "┚"-shaped part. Conversely, separating the hanging part from the "┚"-shaped part can quickly fix or lower the beam rod for measurement, so as to improve the measurement efficiency.

[0028] 4. The hanging part in the present utility model is composed of a connecting rod and a fastener with a hanging hole. Its structure is simple and convenient for fixing and removing from the "┚"-shaped part.

[0029] 5. The purpose of setting the buffer A and buffer B in the present utility model is to prevent the problem that the collision between the hanging part and the fixing part and between the beam rod and the moving frame is likely to cause damage due to jitter during the movement process.

[0030] 6. In the present utility model, it is defined that one side of the top of the vertical plate of the "┚"-shaped part is an inclined surface that is inclined outward and downward, and one side of the bottom surface is an inclined surface that is inclined outward and upward. The purpose is to make it more conducive for the hanging part to squeeze the upper surface or the lower surface of the vertical plate, so that the horizontal plate of the "┚"-shaped part contracts in the T-shaped groove, which is convenient for the operation during the fixing or measurement of the beam rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0032] Figure 1 is the structural schematic diagram of the present utility model;

[0033] Figure 2 is the structural schematic diagram of the moving frame in the present utility model;

[0034] Figure 3 This is a schematic structural view of the fixing structure in the present utility model;

[0035] Figure 4 This is a partial schematic structural view of the sliding block and the hanging member provided on the beam rod in the present utility model;

[0036] Figure 5 This is a schematic structural view of the hanging member in the present utility model;

[0037] In the figure: 1 - beam rod, 2 - moving frame, 3 - fixing structure, 4 - sliding block, 5 - hanging member, 6 - supporting leg, 7 - pulley, 8 - horizontal transverse connecting rod, 9 - horizontal longitudinal connecting rod, 10 - chute, 11 - "┚"-shaped member, 12 - return spring, 13 - slider, 14 - connecting rod, 15 - fastener with hanging hole, 16 - buffer member A, 17 - buffer member B, 18 - cross plate, 19 - vertical plate, 20 - T-shaped groove. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0041] In addition, if terms such as "first", "second", "third", etc. are used only for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0042] In addition, when terms such as "horizontal", "vertical", "hanging" appear, it does not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0043] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, when terms such as "set", "installed", "connected", "connected" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0044] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0045] Embodiment 1

[0046] In order to solve the problems in the prior art that construction workers need to carry the Benkelman beam to move, resulting in high labor costs and low measurement efficiency. As Figures 1-5 shown, a device for detecting the compaction degree of a highway subgrade is provided, which includes a beam rod 1, a tripod, a support rod and a measuring rod arranged on the beam rod 1, and a measuring structure with a measuring table that cooperates with the measuring rod (the tripod, the support rod, the measuring rod and the measuring structure are existing and not shown in the figure). Its characteristics are: including a moving frame 2, a fixing structure 3 arranged on the moving frame 2, a sliding block 4 arranged on the beam rod 1 and longitudinally slidably matched with the moving frame 2, and a hanging part 5 arranged on the beam rod 1 and fixedly or detachably matched with the fixing structure 3.

[0047] In practice, when measurement is required, the hanging part is removed from the fixing structure, so that the tripod and the support rod are in contact with the ground, and the measuring structure with the measuring table can detect the compaction degree of the highway subgrade. When movement is required, the hanging part is hung on the fixing structure, so that the tripod and the support rod are separated from the ground, and the beam rod and the like can be quickly pushed to move, thus eliminating the need for construction workers to carry and move, and reducing high labor costs and improving measurement efficiency.

[0048] Embodiment 2

[0049] On the basis of Embodiment 1, the moving frame 2 includes four pairs of corresponding supporting feet 6, pulleys 7 provided on the supporting feet 6, a horizontal transverse connecting rod 8 connected to one side of the top and bottom of the supporting feet 6, and a horizontal longitudinal connecting rod 9 connected to one side of the top of the supporting feet 6; chutes 10 that cooperate with the sliding blocks 4 are provided on the opposite sides of the supporting feet 6 located on both sides of the horizontal transverse connecting rod 8. In practice, it is not excluded that the moving frame has other structures or includes other components.

[0050] The moving frame is slidably limited to the beam rod through the sliding fit of the chute and the sliding block, and drives the beam rod and the like to move through the pulley. Its structure is simple and it is convenient to move.

[0051] Embodiment 3

[0052] On the basis of Embodiment 2, a T-shaped groove 20 is provided on the horizontal longitudinal connecting rod 9; the fixing structure 3 includes a "┚"-shaped member 11 provided on the horizontal longitudinal connecting rod 9, a return spring 12 and a slider 13 connected to the return spring 12 are provided in the T-shaped groove 20, and the "┚"-shaped member 11 is connected to the slider 13.

[0053] In practice, when measurement is required, first move the beam rod and other components upward. When the hanging holes on the hanging member can allow the fixing structure to pass through, press the "┚"-shaped member to make the slider press the return spring to contract so that the "┚"-shaped member passes through the hanging hole on the hanging member. When the hanging member can move downward and is not restricted by the "┚"-shaped member, the beam rod and other components can be moved downward, and the tripod and the support rod can contact the ground. After contact, the measuring structure with the measuring instrument can detect the compaction degree of the highway subgrade. When moving is required, first press the "┚"-shaped member to make the slider press the return spring to contract, so that the hanging member can move upward and is not restricted by the "┚"-shaped member, then the beam rod and other components can be moved upward, and the tripod and the support rod can be separated from the ground. When the hanging member is moved to an appropriate position where the hanging hole can allow the fixing structure to pass through, the pressing force can be released to make the return spring reset, and the "┚"-shaped member passes through the hanging hole, then the hanging member can be hung on the "┚"-shaped member for fixation. After fixation, it can be driven to move by sliding the moving frame.

[0054] Embodiment 4

[0055] On the basis of Embodiment 3, the hanging member 5 includes a connecting rod 14 connected to the beam rod 1 and a hanging hole fastener 15 connected to the connecting rod 14. The hanging member is composed of a connecting rod and a hanging hole fastener, with a simple structure and is convenient for fixing and detaching from the "┚"-shaped member. Of course, in practice, it is not excluded that the hanging member 5 may have other structures.

[0056] Embodiment 5

[0057] Based on Embodiment 4, a buffer member A16 matching with the belt hanging hole fastener 15 is arranged on the "┚"-shaped member 11, and a buffer member B17 matching with the "┚"-shaped member 11 is arranged on the horizontal longitudinal connecting rod 9. The buffer member A16 and the buffer member B17 are respectively rubber pads, foams or buffer structures with springs. The purpose of arranging the buffer member A and the buffer member B is to prevent the problem that the jitter during the movement causes the hanging parts to collide with the fixing parts and the beam rods to collide with the moving frame, which is easy to damage.

[0058] Embodiment 6

[0059] Based on Embodiment 5, the "┚"-shaped member 11 includes a horizontal plate 18 and a vertical plate 19. One side of the top of the vertical plate 19 is an inclined surface that slopes downward and outward, and one side of the bottom surface is an inclined surface that slopes upward and outward. Defining that one side of the top of the vertical plate of the "┚"-shaped member is an inclined surface that slopes downward and outward, and one side of the bottom surface is an inclined surface that slopes upward and outward, the purpose is to make it more conducive for the hanging part to squeeze the upper surface or the lower surface of the vertical plate so that the horizontal plate of the "┚"-shaped member shrinks into the T-shaped groove, that is, it is convenient for the operation during the fixing or measurement of the beam rod.

Claims

1. A device for detecting compaction of a highway subgrade, comprising a beam (1), a tripod, a support rod and a measuring rod arranged on the beam (1), and a measuring structure with a measuring gauge matched with the measuring rod, characterized in that: The invention comprises a mobile frame (2), a fixed structure (3) arranged on the mobile frame (2), a sliding block (4) arranged on a beam (1) and cooperating with the mobile frame (2) in a longitudinal sliding manner, and a hanging piece (5) arranged on the beam (1) and cooperating with the fixed structure (3) in a fixed or detachable manner.

2. A device for detecting compaction of a highway subgrade according to claim 1, characterized in that: The mobile frame (2) comprises four supporting legs (6) arranged in pairs, pulleys (7) arranged on the supporting legs (6), horizontal transverse connecting rods (8) connected to one side of the top and bottom of the supporting legs (6), and horizontal longitudinal connecting rods (9) connected to one side of the top of the supporting legs (6); Slide grooves (10) matching with the sliding blocks (4) are arranged on opposite sides of the supporting feet (6) located on both sides of the horizontal transverse connecting rod (8).

3. A device for detecting compaction of a highway subgrade according to claim 2, characterized in that: The horizontal longitudinal connecting rod (9) is provided with a T-shaped groove (20); The fixing structure (3) comprises a "┚"-shaped member (11) arranged on the horizontal longitudinal connecting rod (9), a reset spring (12) and a slider (13) connected to the reset spring (12) are arranged in the T-shaped slot (20), and the "┚"-shaped member (11) is connected to the slider (13).

4. A device for detecting compaction of a highway subgrade according to claim 3, characterized in that: The hanging component (5) comprises a connecting rod (14) connected to the beam (1) and a fastener (15) with a hanging hole connected to the connecting rod (14).

5. A device for detecting compaction of a highway subgrade according to claim 4, characterized in that: The "┚"-shaped member (11) is provided with a buffer member A (16) matching with the fastener with hanging hole (15), and the horizontal longitudinal connecting rod (9) is provided with a buffer member B (17) matching with the "┚"-shaped member (11).

6. A device for detecting compaction of highway subgrade according to claim 5, characterized in that: The buffer member A (16) and the buffer member B (17) are respectively a rubber pad or a foam or a buffer structure with a spring.

7. A device for detecting compaction of a highway subgrade according to claim 6, characterized in that: The "┚"-shaped member (11) comprises a horizontal plate (18) and a vertical plate (19), wherein the top side of the vertical plate (19) is an inclined surface inclined outwardly and downwardly, and the bottom side is an inclined surface inclined outwardly and upwardly.

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