Asphalt pavement coring hole repairing tamping device

Abstract

The present application relates to a kind of asphalt pavement coring hole repair ramming device, to solve the problems of low efficiency, unstable density and high labor intensity in the prior art.The device includes support frame, lifting assembly, guide assembly, moving assembly, limiting component, front support, electric hammer and equipment box.Support frame and front support are detachably connected by positioning pin and sleeve, lifting assembly adjusts the height of electric hammer by screw rod and sliding seat, guide assembly ensures stability, electric hammer in equipment box compacts coring hole by ramming piece, moving assembly facilitates device positioning and transfer, and limiting component ensures stability.The present application can realize efficient and stable automatic compaction, improve repair quality, reduce labor intensity, and is suitable for rapid repair of asphalt pavement coring hole.

Description

Technical Field

[0001] This invention relates to the field of road maintenance technology, specifically to a device for repairing and compacting core holes in asphalt pavement. It is mainly used to quickly repair holes left after core drilling in asphalt pavement, ensuring that the repair quality meets the requirements for permeability coefficient and compaction. Background Technology

[0002] During the quality inspection of asphalt pavement construction, core samples need to be drilled to test indicators such as compaction and thickness. This creates cylindrical core holes in the pavement, typically 100-150 mm in diameter. If these core holes are not repaired promptly and with high quality, they will become weak points in the pavement structure, easily leading to defects such as water seepage, loosening, and crack expansion under vehicle loads.

[0003] Current repair techniques primarily employ manual compaction: hot-mix asphalt mixture is filled into the core hole in layers, and then manually compacted using hand-held tampers or screwdrivers. This process presents the following technical problems:

[0004] 1) Unstable compaction: The manual vibration force is insufficient and uneven, the compaction degree is generally lower than 96%, and the permeability coefficient often exceeds the standard limit of 80mL / min;

[0005] 2) Inefficient: Single-point repair takes about 10 minutes, which is difficult to meet the rapid repair needs after large-scale engineering inspections;

[0006] 3) High labor intensity: Repetitive high-frequency vibration can easily cause operator arm vibration syndrome, resulting in high occupational health risks;

[0007] 4) Uncontrollable quality: It is difficult to keep the angle perpendicular when repairing manually, which can easily lead to appearance defects such as incomplete filling and uneven surface.

[0008] Patent application CN202022213349.7 discloses a device for filling core holes in asphalt surface layers, comprising a main frame, which includes a hammer frame and a traveling structure located on one side of the hammer frame. The main frame contains a power unit, a transmission unit, and a hammer component. The transmission unit includes a flywheel and a chain. The power unit is connected to the transmission unit, which is also connected to the hammer component. A limiting component is provided around the lower part of the hammer component, and the bottom end of the hammer component extends into a positioning sleeve. This invention utilizes a constant compaction force applied evenly to the surface of the mixture, combined with the cooperation of the limiting device, to ensure the structural depth and smoothness of the compacted surface.

[0009] The core-hole patching device in the aforementioned patented technology uses a combination of constant compaction force and a limiter, but it suffers from problems such as low hammering frequency, strong dependence on counterweight, and inconvenience in movement. Therefore, there is an urgent need for a mechanized repair device that can both ensure repair quality and improve efficiency while reducing labor intensity. Summary of the Invention

[0010] The purpose of this invention is to provide a device for repairing and compacting asphalt pavement core holes, in order to solve the problems mentioned in the background art.

[0011] (1) How to solve the technical problems of insufficient density, low efficiency and high labor intensity of traditional manual repair, and achieve rapid and high-quality repair of core holes.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] A device for repairing and compacting asphalt pavement core sampling holes;

[0014] Includes support frame, lifting assembly, electric hammer and equipment box;

[0015] The lower end face of the support frame is the contact surface that contacts the asphalt pavement. The lifting assembly includes an upper positioning plate, a lead screw, and a sliding seat. The upper positioning plate is fixed on the upper side of the support frame, the lead screw is supported on the upper positioning plate, the lead screw runs vertically, and the sliding seat is threadedly engaged with the lead screw.

[0016] The side wall of the equipment box is fixedly connected to the sliding seat of the lifting assembly. The equipment box has a cavity. The main body of the electric hammer is fixed in the cavity of the equipment box. The hammer head rod of the electric hammer passes through the equipment box and extends vertically downward to the lower side of the equipment box. The end of the hammer head rod of the electric hammer is fixedly connected to a tamping plate that matches the size of the core hole.

[0017] Based on the above technical solution, the present invention can be further improved as follows.

[0018] Furthermore, it also includes a guide assembly, which includes two guide posts distributed on both sides of the sliding seat of the lifting assembly. The upper end of the guide post is fixedly connected to the upper positioning plate, and the lower end of the guide post is fixedly connected to the support frame. The sliding seat has two vertically oriented guide holes, and the two guide posts respectively cooperate with the two guide holes of the sliding seat.

[0019] Furthermore, the lifting assembly also includes a turntable, with the upper end of the lead screw passing through the upper positioning plate, and the turntable fixedly connected to the upper end of the lead screw.

[0020] Furthermore, it also includes a front support frame, which is located on the front side of the support frame and is detachably connected to the support frame.

[0021] Furthermore, the front support frame is detachably connected to the support frame via several connecting components. The connecting components include a positioning pin and two positioning sleeves. The two positioning sleeves are fixedly connected to the front support frame and the support frame respectively, and the positioning pin passes through the positioning sleeves on the front support frame and the support frame respectively.

[0022] Furthermore, it also includes a moving component, which includes a swing frame, a pressure rod, a U-shaped connecting rod, a pressure seat, and several rollers. The support frame has a through hole at its rear end, penetrating its upper and lower end faces. The front end of the swing frame is hinged to the support frame. The main body of the swing frame is located above the through hole. Several rollers are installed on both sides of the swing frame. The pressure seat is fixedly connected to the upper end face of the swing frame. The pressure seat has a waist-shaped hole. One end of the pressure rod is hinged to the support frame, and the other end of the pressure rod extends out of the rear side of the support frame. The two ends of the U-shaped connecting rod are hinged to the middle of the pressure rod, and the middle of the U-shaped connecting rod passes through the waist-shaped hole of the pressure seat.

[0023] Furthermore, it also includes a limiting component, which includes a rocker arm and a return spring. The lower end of the rocker arm is hinged to the rear end of the support frame, and the upper end of the rocker arm extends towards the swing frame with a contact end. The contact end of the rocker arm can cooperate with the rear end of the swing frame. One end of the return spring is fixed to the upper part of the rocker arm, and the other end of the return spring is fixed to the support frame. When the return spring pulls the rocker arm, it tends to swing towards the front of the support frame.

[0024] Furthermore, the equipment box is equipped with several high-strength springs. The upper ends of the high-strength springs abut against the upper side of the inner wall of the equipment box, and the lower ends of the high-strength springs abut against the electric hammer.

[0025] Furthermore, the lifting assembly also includes a scale and a pointer. The scale is vertically fixed between the support frame and the upper positioning plate, and the pointer is fixedly connected to the sliding seat, pointing to the scale of the scale.

[0026] With this structure, the support frame is placed next to the core hole. The height of the equipment box and the electric hammer is adjusted using the lifting assembly to align the tamping disc with the core hole. The electric hammer is then started, and the tamping disc compacts the asphalt mixture inside the core hole. During compaction, the guiding assembly ensures the stability of the movement, while the limiting and moving components work together to ensure accurate positioning and convenient operation of the device. After repair, the rollers are retracted using the moving component for easy relocation of the device.

[0027] The beneficial effects of this asphalt pavement core sampling and compaction device include:

[0028] (1) High density: The electric hammer provides stable vibration force, resulting in high compaction and effectively reducing the risk of water seepage.

[0029] (2) Efficiency improvement: The repair time for a single point is shortened to 2-3 minutes, significantly improving repair efficiency.

[0030] (3) Low labor intensity: Automated operation reduces human intervention and lowers occupational health risks.

[0031] (4) Quality controllable: Vertical compaction and precise positioning ensure the quality of repair, with a smooth surface and uniform density.

[0032] (5) Strong applicability: It can be adapted to core holes of different depths and diameters, and has good versatility. Attached Figure Description

[0033] Figure 1 This is a front view of an embodiment of the asphalt pavement core sampling hole repair and compaction device.

[0034] Figure 2 This is a top view of an embodiment of the asphalt pavement core sampling hole repair and compaction device.

[0035] Figure 3 This is a cross-sectional view of the equipment box and electric hammer in an embodiment of the asphalt pavement core hole repair and compaction device.

[0036] Figure 4 This is a left view of the support frame, lifting assembly, guide assembly, equipment box, and electric hammer in this embodiment of the asphalt pavement core hole repair and compaction device.

[0037] Explanation of the labels in the diagram:

[0038] Support frame - 110; Front support frame - 120; Positioning pin - 131; Positioning sleeve - 132; Upper positioning plate - 210; Lead screw - 220; Turntable - 230; Sliding seat - 240; Pointer - 250; Scale - 260; Guide column - 310; Electric hammer - 400; Hammering plate - 410; Equipment box - 500; High-strength spring - 510; Swing frame - 610; Pressure rod - 620; U-shaped connecting rod - 630; Pressure seat - 640; Waist-shaped hole - 641; Roller - 650; Swing rod - 710; Return spring - 720. Detailed Implementation

[0039] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Please see Figures 1 to 4 .

[0043] This asphalt pavement core drilling repair and compaction device includes a support frame 110, a lifting assembly, a guiding assembly, a moving assembly, a limiting assembly, a front support frame 120, an electric hammer 400, and an equipment box 500.

[0044] The lower end face of the support frame 110 is the contact surface that contacts the asphalt pavement. The front support frame 120 is arranged in front of the support frame 110. The front support frame 120 is detachably connected to the support frame 110 through two sets of connecting components. The connecting components include a positioning pin 131 and two positioning sleeves 132. The two positioning sleeves 132 are welded and fixed to the front support frame 120 and the support frame 110 respectively. The positioning pin 131 passes through the positioning sleeves 132 on the front support frame 120 and the support frame 110 respectively.

[0045] The lifting assembly includes an upper positioning plate 210, a lead screw 220, a turntable 230, a sliding seat 240, a scale 260, and a pointer 250. The upper positioning plate 210 is fixed to the upper side of the support frame 110. The upper part of the lead screw 220 is supported on the upper positioning plate 210, and the lower end of the lead screw 220 is supported on the support frame 110. The lead screw 220 runs vertically, and the upper end of the lead screw 220 passes through the upper positioning plate 210. The turntable 230 is welded and fixed to the upper end of the lead screw 220. The sliding seat 240 is threadedly engaged with the lead screw 220. The scale 260 is vertically welded and fixed between the support frame 110 and the upper positioning plate 210. The pointer 250 is fixed to the sliding seat 240 and points to the scale of the scale 260.

[0046] The 260-degree scale and 250-degree pointer offer the following advantages: Precise control of hammering depth: Directly observe the tamping settlement through the scale, accurately monitoring the tamping settlement depth and reducing human error; Prevention of over-compaction: Determine the loose-lay thickness and compaction thickness based on the mix proportions, and further ensure the integrity of the mixture by observing the tamping settlement depth, avoiding over-compaction and aggregate breakage caused by over-pressure; Improved construction consistency: Ensures uniform repair thickness; Convenient operation: Reduces frequent measurement time, increasing efficiency by 20%.

[0047] The guide assembly includes two guide posts 310, which are distributed on both sides of the sliding seat 240 of the lifting assembly. The upper end of the guide post 310 is welded and fixed to the upper positioning plate 210, and the lower end of the guide post 310 is welded and fixed to the support frame 110. The sliding seat 240 has two vertically oriented guide holes, and the two guide posts 310 respectively cooperate with the two guide holes of the sliding seat 240.

[0048] The 400 electric hammer is a model with a 40J hammering force. The compaction work of the Marshall electric compactor can be calculated based on its hammer weight and drop height using the formula: W=mgh, where W is the compaction work, m is the hammer mass, g is the acceleration due to gravity (g=9.8m / s²), and h is the drop height. The Marshall electric hammer weighs 10210±10g and has a drop height of 457.2±2.5mm.

[0049] Based on the minimum hammer weight and minimum drop distance, m = 10210 - 10 = 10200g = 10.2kg, h = 457.2 - 2.5 = 454.7mm = 0.4547m, then the compaction work W = mgh = 10.2 × 9.8 × 0.4547 ≈ 45.44J. Therefore, a device with a hammer force of 40 Joules is selected.

[0050] Using a 40J hammer drill (model 400) can improve efficiency and achieve deep compaction, reducing the number of impacts and shortening the repair time for a single point; moreover, it has strong penetration power and solves the problem of loose bottom layer (making it easier to meet the water permeability standard).

[0051] The side wall of the equipment box 500 is fixed to the sliding seat 240 of the lifting component by bolts. The equipment box 500 has a cavity inside. The main body of the electric hammer 400 is fixed in the cavity of the equipment box 500. Two high-strength springs 510 are provided inside the equipment box 500. The upper end of the high-strength spring 510 abuts against the upper side of the inner wall of the equipment box 500, and the lower end of the high-strength spring 510 abuts against the electric hammer 400.

[0052] The high-strength spring 510 has two main functions: (1) the spring can offset part of the impact force in the equipment inside the iron box, preventing it from breaking due to impact. (2) the buffering force of the high-strength spring 510 can ensure the integrity of the mixture during the tamping process, preventing it from breaking due to hard impact. It mainly plays a role in protecting the electric tamping hammer and the mixture, and indirectly ensures the stability of the equipment during operation.

[0053] The hammer head rod of the electric hammer 400 passes through the equipment box 500 and extends vertically downward to the lower side of the equipment box 500. A tamping plate 410 that matches the size of the core hole is welded and fixed to the end of the hammer head rod of the electric hammer 400.

[0054] The moving assembly includes a swing frame 610, a pressure rod 620, a U-shaped connecting rod 630, a pressure seat 640, and four rollers 650. The support frame 110 has through holes at its rear end, penetrating its upper and lower end faces. The front end of the swing frame 610 is hinged to the support frame 110. The main body of the swing frame 610 is located above the through hole. The four rollers 650 are installed on both sides of the swing frame 610. The pressure seat 640 is welded and fixed to the upper end face of the swing frame 610. The pressure seat 640 has a waist-shaped hole 641. One end of the pressure rod 620 is hinged to the support frame 110, and the other side of the pressure rod 620 extends out of the rear side of the support frame 110. The two ends of the U-shaped connecting rod 630 are hinged to the middle of the pressure rod 620. The middle of the U-shaped connecting rod 630 passes through the waist-shaped hole 641 of the pressure seat 640.

[0055] The limiting assembly includes a rocker arm 710 and a return spring 720. The lower end of the rocker arm 710 is hinged to the rear end of the support frame 110. The upper end of the rocker arm 710 extends towards the swing frame 610 and has a contact end. The contact end of the rocker arm 710 can cooperate with the rear end of the swing frame 610. One end of the return spring 720 is fixed to the upper part of the rocker arm 710, and the other end of the return spring 720 is fixed to the support frame 110. When the return spring 720 pulls the rocker arm 710, it tends to swing towards the front of the support frame 110.

[0056] In use, place the support frame 110 next to the core hole, and adjust the height of the equipment box 500 and the electric hammer 400 by rotating the screw 220 using the turntable 230, so that the tamping disc 410 is aligned with the core hole. Start the electric hammer 400, and the tamping disc 410 compacts the asphalt mixture in the core hole. During the compaction process, the guide component ensures the stable movement of the electric hammer 400.

[0057] After repair, remove the front support frame 120 and press down on the pressure rod 620. The pressure rod 620, through the U-shaped connecting rod 630, drives the swing frame 610 and roller 650 to swing downwards. The rear end of the swing frame 610 engages with the contact end of the swing rod 710, preventing the swing frame 610 from swinging upwards again. During this process, the roller 650 gradually contacts the ground and acts in the opposite direction to lift the support frame 110 upwards. At this time, the support frame 110 does not contact the asphalt pavement, and the limiting component ensures the stability of the swing frame 610. This facilitates the transfer of the device to the next working point.

[0058] The asphalt pavement core sampling hole repair and compaction device in this embodiment was used for four tests. The table below shows the time of the four tests:

[0059]

[0060] The test results are as follows:

[0061] (1) Compaction degree: The compaction degree of the four samples was tested by core drilling. The compaction degree of the four samples was 95.8-97.6%, the mean was 96.8%, the standard deviation was 0.58, and all were ≥96%.

[0062] (2) Permeability coefficient: The permeability of the road surface was measured by a pavement permeability meter. The permeability coefficient of the four samples was 68-79 mL / min, with an average of 75.6 mL / min and all samples were ≤80 mL / min.

[0063] (3) Appearance quality: The height difference between the repaired area and the surrounding road surface is ≤2mm, there is no loosening or segregation, and the appearance qualification rate is 100%;

[0064] (4) Operation efficiency: The average repair time per point is 5.6 minutes, which is 44% more efficient than manual repair (10 minutes).

[0065] The above description is only one embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the principle of the present invention, and these should also be considered to fall within the protection scope of the present invention.

Claims

1. A device for repairing and compacting asphalt pavement core sampling holes, characterized in that: Includes a support frame (110), a lifting assembly, an electric hammer (400), and an equipment box (500); The lower end face of the support frame (110) is the contact surface that contacts the asphalt pavement. The lifting assembly includes an upper positioning plate (210), a lead screw (220), and a sliding seat (240). The upper positioning plate (210) is fixed on the upper side of the support frame (110), and the lead screw (220) is supported on the upper positioning plate (210). The direction of the lead screw (220) is vertical, and the sliding seat (240) is threadedly engaged with the lead screw (220). The side wall of the equipment box (500) is fixedly connected to the sliding seat (240) of the lifting assembly. The equipment box (500) has a cavity. The main body of the electric hammer (400) is fixed in the cavity of the equipment box (500). The hammer head rod of the electric hammer (400) passes through the equipment box (500) and extends vertically downward to the lower side of the equipment box (500). The end of the hammer head rod of the electric hammer (400) is fixedly connected to a tamping plate (410) that matches the size of the core hole.

2. The asphalt pavement core sampling hole repair and compaction device according to claim 1, characterized in that: It also includes a guide assembly, which includes two guide posts (310) distributed on both sides of the sliding seat (240) of the lifting assembly. The upper end of the guide post (310) is fixedly connected to the upper positioning plate (210), and the lower end of the guide post (310) is fixedly connected to the support frame (110). The sliding seat (240) has two vertically oriented guide holes, and the two guide posts (310) respectively cooperate with the two guide holes of the sliding seat (240).

3. The asphalt pavement core sampling hole repair and compaction device according to claim 1, characterized in that: The lifting assembly also includes a turntable (230), the upper end of the lead screw (220) passes through the upper positioning plate (210), and the turntable (230) is fixedly connected to the upper end of the lead screw (220).

4. The asphalt pavement core sampling hole repair and compaction device according to claim 1, characterized in that: It also includes a front support frame (120), which is arranged on the front side of the support frame (110) and is detachably connected to the support frame (110).

5. The asphalt pavement core sampling hole repair and compaction device according to claim 4, characterized in that: The front support frame (120) is detachably connected to the support frame (110) through several connecting components. The connecting components include a positioning pin (131) and two positioning sleeves (132). The two positioning sleeves (132) are fixedly connected to the front support frame (120) and the support frame (110) respectively. The positioning pin (131) passes through the positioning sleeves (132) on the front support frame (120) and the support frame (110) respectively.

6. The asphalt pavement core sampling hole repair and compaction device according to claim 1, characterized in that: It also includes a moving component, which includes a swing frame (610), a pressure rod (620), a U-shaped connecting rod (630), a pressure seat (640), and several rollers (650). The support frame (110) has a through hole at its rear end, penetrating its upper and lower end faces. The front end of the swing frame (610) is hinged to the support frame (110), and the main body of the swing frame (610) is located above the through hole. Several rollers (650) are installed on both sides of the swing frame (610). The pressure seat (640) is fixedly connected to the upper end face of the swing frame (610). The pressure seat (640) has a waist-shaped hole (641). One end of the pressure rod (620) is hinged to the support frame (110). The other side of the pressure rod (620) extends out of the rear side of the support frame (110). The two ends of the U-shaped connecting rod (630) are hinged to the middle of the pressure rod (620). The middle of the U-shaped connecting rod (630) passes through the waist-shaped hole (641) of the pressure seat (640).

7. The asphalt pavement core sampling hole repair and compaction device according to claim 6, characterized in that: It also includes a limiting component, which includes a rocker arm (710) and a return spring (720). The lower end of the rocker arm (710) is hinged to the rear end of the support frame (110). The upper end of the rocker arm (710) extends toward the swing frame (610) and has a contact end. The contact end of the rocker arm (710) can cooperate with the rear end of the swing frame (610). One end of the return spring (720) is fixed to the upper part of the rocker arm (710), and the other end of the return spring (720) is fixed to the support frame (110). The return spring (720) pulls the rocker arm (710) so that it tends to swing toward the front of the support frame (110).

8. The asphalt pavement core sampling hole repair and compaction device according to claim 1, characterized in that: The equipment box (500) is equipped with several high-strength springs (510). The upper end of the high-strength springs (510) abuts against the upper side of the inner wall of the equipment box (500), and the lower end of the high-strength springs (510) abuts against the electric hammer (400).

9. The asphalt pavement core sampling hole repair and compaction device according to claim 1, characterized in that: The lifting assembly also includes a scale (260) and a pointer (250). The scale (260) is vertically fixed between the support frame (110) and the upper positioning plate (210), and the pointer (250) is fixedly connected to the sliding seat (240). The pointer (250) points to the scale of the scale (260).

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