Bituminous pavement interlayer bonding strength detection device

Abstract

The invention relates to the technical field of bonding strength detection, in particular to an asphalt pavement interlayer bonding strength detection device which comprises a pull head, a fixing assembly used for being fixed to the ground is clamped in the pull head, the fixing assembly comprises a sleeve, four clamping grooves are formed in the inner wall of the upper end of the sleeve, and cross rods are clamped in the clamping grooves. The inner ring and the outer ring are embedded in the surface of the cross-shaped rod, the inner ring and the outer ring are supported at the upper end of the sleeve through the cross-shaped rod, then an adhesive is injected into the sleeve, the adhesive and the cross-shaped rod are fixed through the conical blocks, and then the cross-shaped rod is fixed inside the pull head. The conical blocks are pulled through the pull rods on the inner ring and the outer ring, and the adhesive is pulled through the conical blocks, so that the adhesive and the pull head form a whole, the situation that the pull on the road surface is influenced by unstable connection of the pull head and the adhesive is prevented, and the pull borne by the ground is kept consistent with the force applied by the hydraulic cylinder.

Description

Technical Field

[0001] The present invention relates to the field of bond strength detection, and specifically relates to a device for detecting the interlayer bond strength of asphalt pavement. Background Art

[0002] In the structural design of asphalt pavement, interlayer bonding is a crucial factor that directly affects the performance and service life of the pavement. Good interlayer bonding can ensure the integrity of the pavement structure, effectively transfer vehicle loads, and reduce the risk of interlayer sliding and shear failure. For a formed asphalt pavement, it is necessary to detect the interlayer bond strength. The interlayer bond strength detection can evaluate the construction quality, ensure that the construction technology and materials of the asphalt pavement meet the requirements, and avoid poor bonding of the asphalt pavement caused by improper construction.

[0003] For example, a device for detecting the tensile force of interlayer bonding of a pavement with the publication number CN219830780U can cope with complex detection environments compared with traditional detection devices, and the driving motor can provide a stable force value output for the pulling head, which is more accurate and labor-saving than manual detection. However, the detection device is connected to the pavement through a pulling head and an adhesive, and a part of the tensile force is also borne between the pulling head and the adhesive during the upward pulling process, which reduces the pulling force of the adhesive on the pavement. Moreover, the detection device is supported by hydraulic support legs. When there are depressions on the pavement, the pulling force of the device will be affected by the inclined pavement and the direction will deviate, which causes the pulling force to be dispersed again and affects the detection result of the interlayer bond strength of the pavement. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a device for detecting the interlayer bond strength of asphalt pavement.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a device for detecting the interlayer bond strength of asphalt pavement, including a support plate. Four columns for supporting the support plate are provided at the lower end of the support plate. A hydraulic cylinder for providing tensile force is fixedly connected to the center of the upper surface of the support plate. A pulling head for assisting the hydraulic cylinder is arranged at the output end of the hydraulic cylinder; A fixing component for fixing to the ground is clamped inside the pulling head. The fixing component includes a sleeve. Four clamping grooves are opened on the inner wall of the upper end of the sleeve. A cross bar is clamped inside the clamping grooves. An inner ring and an outer ring are embedded on the surface of the cross bar. Four threaded holes are opened around the center of the lower surfaces of the inner ring and the outer ring. Threaded blocks are threadedly connected inside the threaded holes. A pull rod is fixedly connected to the lower end of the threaded block. A cone is fixedly connected to the lower end of the pull rod.

[0006] Specifically, both the pull rod and the cone are located inside the sleeve, and there is a gap between the lower end of the cone and the bottom of the sleeve.

[0007] Specifically, a connecting component is provided at the lower end of the slider. The connecting component includes four arc-shaped blocks which are fixedly connected to the outer wall of the lower end of the slider. Four clamping grooves are equidistantly formed on the inner wall of the slider. A snap ring is movably sleeved on the outer wall of the slider. Four L-shaped grooves are equidistantly formed on the outer wall of the snap ring. Two fixing rods are symmetrically and fixedly connected to the upper surface of the snap ring.

[0008] Specifically, the cross bar is clamped inside the clamping groove and the L-shaped groove.

[0009] Specifically, a stabilizing component is provided at the lower end of the upright post. The stabilizing component includes a pressing ring which is fixedly connected to the lower end of the upright post. A collar is movably sleeved on the outer wall of the pressing ring. A supporting ring is fixedly sleeved on the inner wall of the lower end of the collar. A rubber gasket is clamped on the inner wall of the collar. An annular groove is formed on the outer wall of the rubber gasket.

[0010] Specifically, four insertion holes are formed around the center of the outer wall of the collar. Plug plates are inserted into the insertion holes. One end of the plug plate located outside the collar is fixedly connected with a rubber strip.

[0011] Specifically, the rubber gasket is clamped between the pressing ring and the supporting ring. Inclined surfaces are formed on both sides of the inner wall of the rubber gasket.

[0012] Advantages of the present invention: (1) For the asphalt pavement interlayer bonding strength detection device of the present invention, the inner ring and the outer ring are supported on the upper end of the sleeve through the cross bar, and then the adhesive is injected into the sleeve. The adhesive is fixed to the cross bar through a plurality of tapered blocks, and then the cross bar is fixed inside the slider. When the cross bar is pulled upward by the slider, the tapered blocks are pulled by the pull rods on the inner ring and the outer ring, and the adhesive is pulled by the tapered blocks, so that a whole is formed between the adhesive and the slider, preventing the unstable connection between the slider and the adhesive from affecting the pulling force on the road surface, and keeping the pulling force received by the ground consistent with the force applied by the hydraulic cylinder.

[0013] (2) For the asphalt pavement interlayer bonding strength detection device of the present invention, the pressing ring is supported by the collar and the supporting ring. When the pressing ring receives the pressure applied downward by the upright post, the pressing ring applies the pressure to the rubber gasket, and then pulls the rubber strip to drive the plug plate to move out of the insertion hole, releasing the support for the rubber gasket, so that the rubber gasket deforms following the pressure, enabling the pressing ring to automatically adapt to be perpendicular to the pressure received by the ground, thus avoiding the influence of the road surface inclination on the device and enabling the pulling force to stably pull the road surface vertically upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the drawings and embodiments.

[0015] Figure 1 Schematic cross-sectional structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 2 Appearance view of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 3 Schematic sleeve structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 4 Schematic cross-bar structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 5 Schematic tension rod structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 6 Schematic drawing head structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 7 Schematic snap ring structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention; Figure 8 Schematic rubber washer structure diagram of a device for detecting the interfacial bonding strength of asphalt pavement provided by the present invention.

[0016] In the figure: 1, support plate; 2, column; 3, hydraulic cylinder; 4, drawing head; 5, fixing component; 51, sleeve; 52, clamping groove; 53, cross bar; 54, inner ring; 55, outer ring; 56, threaded hole; 57, threaded block; 58, tension rod; 59, tapered block; 6, connecting component; 61, arc block; 62, clamping groove; 63, snap ring; 64, L-shaped groove; 65, fixing rod; 7, stabilizing component; 71, pressing ring; 72, sleeve ring; 73, support ring; 74, rubber washer; 75, annular groove; 76, insertion hole; 77, insertion plate; 78, rubber strip. Detailed implementation manners

[0017] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0018] Please refer to Figures 1 to 8 , the present invention provides the following technical solutions: Embodiment 1: A device for detecting the interfacial bonding strength of asphalt pavement, including a support plate 1. Four columns 2 for supporting the support plate 1 are arranged at the lower end of the support plate 1. A hydraulic cylinder 3 for providing tensile force is fixedly connected to the center of the upper surface of the support plate 1. A drawing head 4 for assisting the hydraulic cylinder 3 is arranged at the output end of the hydraulic cylinder 3.

[0019] In use, first place the column 2 on the ground, then fix the pull head 4 to the ground with an adhesive. After the pull head 4 is stably connected to the ground, control the hydraulic cylinder 3 to pull the pull head 4 upward, gradually increase the pulling force of the hydraulic cylinder 3, and judge whether the ground interlayer is separated according to the height at which the pull head 4 is lifted. When the ground interlayer is separated, record the pulling force value applied by the hydraulic cylinder 3, thereby completing the detection of the bonding strength of the ground interlayer.

[0020] Embodiment 2: The technical solution of this embodiment different from that of Embodiment 1 includes: a fixing component 5 for fixing to the ground is clamped inside the pull head 4. The fixing component 5 includes a sleeve 51. Four clamping grooves 52 are opened on the inner wall of the upper end of the sleeve 51. A cross bar 53 is clamped inside the clamping groove 52. An inner ring 54 and an outer ring 55 are embedded on the surface of the cross bar 53. Four threaded holes 56 are evenly opened on the lower surfaces of the inner ring 54 and the outer ring 55 around the center. A threaded block 57 is threadedly connected inside the threaded hole 56. The lower end of the threaded block 57 is fixedly connected to a pull rod 58. The lower end of the pull rod 58 is fixedly connected to a tapered block 59; Both the pull rod 58 and the tapered block 59 are located inside the sleeve 51, and there is a gap between the lower end of the tapered block 59 and the bottom of the sleeve 51.

[0021] In use, first place the sleeve 51 on the surface of the asphalt ground to be detected, then clamp the cross bar 53 in the clamping groove 52, support the inner ring 54 and the outer ring 55 at the upper end of the sleeve 51 through the cross bar 53, then inject the adhesive into the sleeve 51 so that the adhesive covers the tapered block 59. After the adhesive is completely cured, fix the adhesive to the cross bar 53 through multiple tapered blocks 59, and then fix the cross bar 53 inside the pull head 4. When the cross bar 53 is pulled upward by the pull head 4, the tapered block 59 is pulled by the pull rod 58 on the inner ring 54 and the outer ring 55, and the adhesive is pulled by the tapered block 59, so that a whole is formed between the adhesive and the pull head 4, preventing the unstable connection between the pull head 4 and the adhesive from affecting the pulling force on the road surface, and making the pulling force received by the ground consistent with the force applied by the hydraulic cylinder 3.

[0022] Embodiment 3: The technical solution of this embodiment different from that of Embodiment 2 includes: a connection component 6 is arranged at the lower end of the pull head 4. The connection component 6 includes four arc blocks 61. The arc blocks 61 are fixedly connected to the outer wall of the lower end of the pull head 4. Four clamping grooves 62 are evenly opened on the inner wall of the pull head 4. A snap ring 63 is movably sleeved on the outer wall of the pull head 4. Four L-shaped grooves 64 are evenly opened on the outer wall of the snap ring 63. Two fixing rods 65 are symmetrically fixedly connected to the upper surface of the snap ring 63.

[0023] The cross bar 53 is clamped inside the clamping groove 62 and the L-shaped groove 64. The positions of the pull head 4 with the clamping groove 62 and the tapered block 59 are fixed through the cross bar 53, and the cross bar 53 is fixed in the clamping groove 62 through the L-shaped groove 64.

[0024] During use, first rotate the snap ring 63 so that the L-shaped groove 64 corresponds to the clamping groove 62, then insert the cross bar 53 into the clamping groove 62, and at the same time insert the cross bar 53 into the L-shaped groove 64. Then push the fixed rod 65 to drive the snap ring 63 to rotate, so that the cross bar 53 is stably inserted into the innermost side of the L-shaped groove 64, and the L-shaped groove 64 fixes the cross bar 53 inside the pull head 4.

[0025] Embodiment 4: The technical solution of this embodiment different from that of Embodiment 3 includes: A stabilizing assembly 7 is provided at the lower end of the column 2. The stabilizing assembly 7 includes a pressure ring 71. The pressure ring 71 is fixedly connected to the lower end of the column 2. A collar 72 is movably sleeved on the outer wall of the pressure ring 71. A support ring 73 is fixedly sleeved on the inner wall at the lower end of the collar 72. A rubber washer 74 is clamped on the inner wall of the collar 72. A ring groove 75 is formed on the outer wall of the rubber washer 74. Four jacks 76 are formed around the center of the outer wall of the collar 72. Plug plates 77 are inserted into the interiors of the jacks 76. One end of each plug plate 77 located outside the collar 72 is fixedly connected to a rubber strip 78. The rubber washer 74 is clamped between the pressure ring 71 and the support ring 73. Inclined surfaces are formed on both sides of the inner wall of the rubber washer 74.

[0026] During use, first support the pressure ring 71 through the collar 72 and the support ring 73. When the pressure ring 71 receives the pressure applied downward by the column 2, the pressure ring 71 applies the pressure to the rubber washer 74. Then pull the rubber strip 78 to drive the plug plate 77 to move out of the jack 76, releasing the support for the rubber washer 74, so that the rubber washer 74 deforms following the pressure. When the pressure ring 71 is tilted, the center of gravity of the pressure ring 71 changes, resulting in a greater pressure on one side of the rubber washer 74. The position of the rubber washer 74 where it receives the pressure will automatically contract, and then the pressure ring 71 above the rubber washer 74 will automatically change its inclination angle, causing the center of gravity of the pressure ring 71 to change, so that the pressure ring 71 automatically adapts to be perpendicular to the pressure received from the ground, thus avoiding the influence of the inclination of the road surface on the equipment and enabling the pulling force to stably pull the road surface vertically upward.

[0027] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An asphalt pavement interlayer bond strength detection device, including a support plate (1), four columns (2) for supporting the support plate (1) are arranged at the lower end of the support plate (1), a hydraulic cylinder (3) for providing tensile force is fixedly connected to the center of the upper surface of the support plate (1), and a pull head (4) for assisting the hydraulic cylinder (3) is arranged at the output end of the hydraulic cylinder (3); It is characterized in that: A fixing component (5) for fixing to the ground is clamped inside the pull head (4). The fixing component (5) includes a sleeve (51). Four clamping grooves (52) are opened on the inner wall of the upper end of the sleeve (51). A cross bar (53) is clamped inside the clamping grooves (52). An inner ring (54) and an outer ring (55) are embedded on the surface of the cross bar (53). Four threaded holes (56) are opened around the center on the lower surfaces of the inner ring (54) and the outer ring (55). A threaded block (57) is threadedly connected inside the threaded holes (56). A pull rod (58) is fixedly connected to the lower end of the threaded block (57). A conical block (59) is fixedly connected to the lower end of the pull rod (58).

2. The interlayer bonding strength detection device for asphalt pavement according to claim 1, characterized in that: Both the pull rod (58) and the conical block (59) are located inside the sleeve (51), and there is a gap between the lower end of the conical block (59) and the bottom of the sleeve (51).

3. The interlayer bond strength detection device for asphalt pavement according to claim 1, characterized in that: A connecting component (6) is arranged at the lower end of the pull head (4). The connecting component (6) includes four arc blocks (61). The arc blocks (61) are fixedly connected to the outer wall of the lower end of the pull head (4). Four clamping grooves (62) are equidistantly opened on the inner wall of the pull head (4). A snap ring (63) is movably sleeved on the outer wall of the pull head (4). Four L-shaped grooves (64) are equidistantly opened on the outer wall of the snap ring (63). Two fixing rods (65) are symmetrically fixedly connected to the upper surface of the snap ring (63).

4. The interlayer bonding strength detection device for asphalt pavement according to claim 3, characterized in that: The cross bar (53) is clamped inside the clamping grooves (62) and the L-shaped grooves (64).

5. The interlayer bonding strength detection device for asphalt pavement according to claim 1, characterized in that: A stabilizing component (7) is arranged at the lower end of the column (2). The stabilizing component (7) includes a pressing ring (71). The pressing ring (71) is fixedly connected to the lower end of the column (2). A collar (72) is movably sleeved on the outer wall of the pressing ring (71). A support ring (73) is fixedly sleeved on the inner wall of the lower end of the collar (72). A rubber washer (74) is clamped on the inner wall of the collar (72). A ring groove (75) is opened on the outer wall of the rubber washer (74).

6. The interlayer bonding strength detection device for asphalt pavement according to claim 5, wherein: Four insertion holes (76) are opened around the center on the outer wall of the collar (72). Plug plates (77) are inserted into the insertion holes (76). A rubber strip (78) is fixedly connected to the end of the plug plate (77) located outside the collar (72).

7. An interlayer bond strength detection device for asphalt pavement according to claim 5, characterized in that: The rubber washer (74) is clamped between the pressing ring (71) and the support ring (73), and inclined surfaces are opened on both sides of the inner wall of the rubber washer (74).

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