Pavement base integrity coring device and construction method

Abstract

The invention discloses a pavement base integrity coring device and a construction method, and relates to the technical field of pavement detection. The pavement base integrity coring device comprises a vertical rod, a first clamping shell, a second clamping shell, a connecting rod and a handle, the first clamping shell is fixedly installed at the bottom end of the vertical rod, the second clamping shell is rotationally connected with the first clamping shell, the connecting rod is obliquely arranged, the bottom end of the connecting rod is connected with the second clamping shell, the top end of the connecting rod is connected with the handle, and the vertical rod and the connecting rod are crossed in an X shape. The first arc plate of the first clamping shell can be conveniently inserted into a cutting gap, a core sample is pried off by utilizing the first arc plate, so that the core sample is loosened and can be completely taken out in the later period, and the operation is simple and labor-saving; the first clamping shell and the second clamping shell are both inserted into a cutting gap, then a user grasps the handles on the vertical rod and the connecting rod with the two hands respectively, the core sample is clamped through the arm force of the arms instead of the gripping force of the fingers, and therefore the core sample clamping device is simpler, more convenient, more labor-saving and rapider in operation mode.

Description

Technical Field

[0001] The invention relates to the technical field of pavement detection, and in particular to a pavement base integrity coring device and a construction method. Background Art

[0002] The pavement base layer includes the subbase layer and the base layer laid on the subbase layer.

[0003] After the construction of the pavement base is completed, a coring machine is needed to obtain core samples by circular cutting. The core samples are then extracted from the pavement base and transported to the laboratory for performance testing (such as compressive strength testing).

[0004] The traditional coring method is: after the core drilling is completed, the core drilling machine is removed, a screwdriver is used to pry the core sample around to loosen it, and then the core sample is taken out as a whole with a core sample clamp.

[0005] The cutting gaps around the core sample are narrow, which makes it difficult to insert a screwdriver into the cutting gaps, increasing the difficulty of construction and reducing construction efficiency. In addition, the overall thickness of the pavement base generally exceeds 50 cm, so the core sample has a large height and weight, and the traditional core sample clamp is in the shape of a short and thin rod with a small contact surface with the core sample (it can only clamp the top of the side wall of the core sample), and it completely relies on the operator's finger grip to clamp the core sample, which is laborious, time-consuming and inefficient. Summary of the invention

[0006] In order to overcome the problem in the above-mentioned background technology that "the traditional coring method is difficult to loosen the core sample, and is difficult and inefficient to operate when clamping and extracting the core sample", the present invention provides a pavement base integrity coring device and a construction method.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: The present embodiment provides a pavement base integrity coring device, comprising a vertical pole, a first clamping shell, a second clamping shell, a connecting rod and a handle; the first clamping shell is fixedly mounted at the bottom end of the vertical pole, the second clamping shell is rotatably connected to the first clamping shell, the connecting rod is inclined and the bottom end is fixedly connected to the second clamping shell, and the top end is fixedly connected to the handle, and the vertical pole and the connecting rod are cross-arranged in an X shape.

[0008] As a further optimization scheme of the present invention, the first clamping shell includes a first arc plate and a first top plate arranged at the top of the first arc plate, and the second clamping shell includes a second arc plate and a second top plate arranged at the top of the second arc plate; the first top plate and the second top plate are both semicircular; the first top plate and the second top plate are spliced ​​into a full circle shape and are connected by a hinge.

[0009] As a further optimization solution of the present invention, the openings of the first arc plate and the second arc plate are arranged opposite to each other.

[0010] As a further optimization scheme of the present invention, a semicircular convex plate is connected to the middle of the straight edge of the first top plate, and a semicircular groove is connected to the middle of the straight edge of the second top plate, and the semicircular convex plate is adapted to the semicircular groove; the bottom end surface of the vertical pole is fixedly connected to the first top plate and the semicircular convex plate.

[0011] As a further optimization solution of the present invention, a vertical groove is provided in the middle and lower part of the vertical pole, the vertical groove is a through groove structure with left and right ends opened, and the middle part of the connecting rod is inserted into the vertical groove.

[0012] As a further optimization solution of the present invention, the bottom end of the connecting rod is fixedly connected to the inner side of the middle part of the arc-shaped edge of the second top plate.

[0013] As a further optimization solution of the present invention, the height of the first clamping shell is greater than the height of the second clamping shell.

[0014] As a further optimization solution of the present invention, a first plug-in tip is provided at the bottom end of the first arc plate; and a second plug-in tip is provided at the bottom end of the second arc plate.

[0015] The construction method of the pavement base integrity coring device, that is, the steps of taking out the core sample using the pavement base integrity coring device include: S1, grasping the vertical pole to make the vertical pole stand upright; S2, inserting the first arc plate into the cutting gap of the outer periphery of the core sample, and the second arc plate is not inserted; then grasping and shaking the vertical pole to disconnect the root of the core sample from the base layer; S3, inserting the first arc plate and the second arc plate into the cutting gap of the outer periphery of the core sample; then grasping the handle and rotating the connecting rod and the second clamping shell so that the first clamping shell and the second clamping shell clamp the core sample; S4, grasping the vertical pole and lifting it upward, and at the same time grasping the handle and lifting it upward to extract the core sample.

[0016] In summary, the present invention has at least one of the following benefits: (1) The present invention has a simple structure, reliable functions, and saves time and effort. The height of the first clamping shell is greater than that of the second clamping shell. The bottom end of the first arc plate is inserted into the cutting slit (the second arc plate is not inserted into the cutting slit), and then the vertical rod is shaken to use the first arc plate to pry the core sample off from the base layer. Compared with a screwdriver, the present invention is easier to insert into the cutting slit. Compared with the solution of holding a screwdriver and using wrist force to pry the core sample, the present invention uses arm force to pry, thereby having a more convenient and labor-saving force application form. The present invention does not require tool replacement during operation, thereby simplifying the operation steps and improving operation efficiency.

[0017] (2) The second clamping shell is connected to the connecting rod, and the vertical rod and the connecting rod are arranged crosswise in an X shape. A handle is provided at the end of the connecting rod. After the user grasps the handle and the vertical rod, the core sample is clamped by the arm strength rather than the gripping strength of the fingers, thereby having a simpler and more convenient operation form.

[0018] (3) The first top plate is provided with a connecting riser for injecting water and a freezing fluid into the inner cavity of the first clamping shell. When the water in the gap between the first clamping shell and the core sample is frozen into ice, the first clamping shell and the core sample can be bonded and fixed, thereby solving the problem of insufficient friction between the first clamping shell and the core sample causing slippage and making it impossible to extract the core sample.

[0019] (4) Slide the limit structure upward so that the limit structure, the connecting rod and the vertical rod are locked with each other, so that the first clamping shell and the second clamping shell can be clamped. Then the user can free his hands to perform the freezing operation, thereby realizing single-person operation and improving the convenience of operation.

[0020] (5) The connecting rod is arranged perpendicularly to the straight edge of the first top plate / the second top plate, and the bottom end of the connecting rod is fixedly connected to the inner side of the middle part of the arc-shaped edge of the second top plate. This can avoid unbalanced load between the vertical rod and the second clamping shell, thereby improving the clamping stability and comfort, and increasing the service life of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below with reference to the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the first clamping shell and the second clamping shell; Figure 3 It is a front view schematic diagram of the first clamping shell and the second clamping shell rotating to a coaxial state; Figure 4 It is a schematic diagram of the state in which the first clamping shell and the second clamping shell clamp the core sample; Figure 5 It is a top view schematic diagram of the present invention; Figure 6 It is a schematic diagram of the gripping position of the present invention; Figure 7 It is the installation position and structural diagram of the connecting riser; Figure 8 This is a schematic diagram of the installation position of the limiting structure; Fig. 9 It is a schematic cross-sectional view of the limiting structure.

[0022] Description of reference numerals: In the figure, 1. Vertical pole; 11. Vertical slot; 2. first clamping shell; 201. vent hole; 21. first arc plate; 211. first plugging tip; 22. first top plate; 221. semicircular convex plate; 222. connecting riser; 223. top hole; 3. second clamping shell; 31. second arc plate; 311. second plugging tip; 32. second top plate; 321. semicircular groove; 4. Hinge; 5. Connecting rod; 6. handle; 61. diagonal support plate; 62. end plate; 7. Core sample; 8. Limiting structure; 81. Guide sleeve; 82. Extension block; 821. Insertion slot; 8211. Arc surface. DETAILED DESCRIPTION

[0023] Based on the above structural features of the present application, the implementation methods of the present application are further described: Reference Figure 1 The present embodiment provides a road base integrity coring device, comprising a pole 1, a first clamping shell 2, a second clamping shell 3, a connecting rod 5 and a handle 6; the first clamping shell 2 is fixedly mounted at the bottom end of the pole 1, the second clamping shell 3 is rotatably connected to the first clamping shell 2, the connecting rod 5 is tilted and the bottom end is fixedly connected to the second clamping shell 3 (for example, by bolts or welding), and the top end is fixedly connected to the handle 6 (for example, by bolts or welding), the pole 1 and the connecting rod 5 are cross-arranged in an X shape and can rotate relative to each other. When the pole 1 and the connecting rod 5 rotate relative to each other, the first clamping shell 2 and the second clamping shell 3 can be driven to open or close.

[0024] Reference Figure 1 and Figure 4 When the first clamping shell 2 and the second clamping shell 3 are buckled, the inner cavity of the first clamping shell 2 and the inner cavity of the second clamping shell 3 are combined into a cylindrical shape to adapt to clamping the core sample 7. The core sample 7 is a core sample 7, which is cylindrical and is obtained by ring cutting of a traditional drilling coring device. The traditional drilling coring device is a conventional existing technology in the industry, and the specific structure is not repeated.

[0025] Reference Figure 1 and Figure 2The first clamping shell 2 includes a first arc plate 21 and a first top plate 22 arranged at the top of the first arc plate 21, and the second clamping shell 3 includes a second arc plate 31 and a second top plate 32 arranged at the top of the second arc plate 31; the first top plate 22 and the second top plate 32 are both semicircular; the first top plate 22 and the second top plate 32 are spliced ​​into a full circle shape and connected by a hinge 4. When the first clamping shell 2 and the second clamping shell 3 are buckled, the first arc plate 21 and the second arc plate 31 can be buckled into a cylindrical shape to adapt to clamping the core sample 7. The openings of the first arc plate 21 and the second arc plate 31 are arranged opposite to each other, so that the first arc plate 21 and the second arc plate 31 clamp the left and right sides of the core sample 7 respectively.

[0026] Reference Figure 1 to Figure 4 , a semicircular convex plate 221 is connected to the middle of the straight edge of the first top plate 22, a semicircular groove 321 is connected to the middle of the straight edge of the second top plate 32, and the semicircular convex plate 221 is adapted to the semicircular groove 321; the bottom end surface of the vertical rod 1 is fixedly connected to the first top plate 22 and the semicircular convex plate 221 (for example, fixedly connected by bolts, fixedly connected by welding, or fixedly connected in an integrated manner). The semicircular convex plate 221 is fixedly connected to the first top plate 22 in an integrated manner. When the first clamping shell 2 and the second clamping shell 3 are buckled, the vertical rod 1 is located at the center of the first top plate 22 and the second top plate 32, thereby avoiding unbalanced load when lifting the core sample 7. The first clamping shell 2 is coaxially arranged with the vertical rod 1.

[0027] Reference Figure 4 , a vertical groove 11 is provided in the middle and lower part of the vertical rod 1. The vertical groove 11 is a through groove structure with openings at both ends. The middle part of the connecting rod 5 is inserted into the vertical groove 11. The outer wall of the connecting rod 5 is attached to and slidably connected with the inner wall of the vertical groove 11. When the core sample 7 is clamped, the inner wall of the vertical groove 11 can exert a supporting force and a limiting force on the connecting rod 5 to prevent the connecting rod 5 from bending (if there is a large gap between the outer wall of the connecting rod 5 and the inner wall of the vertical groove 11, the connecting rod 5 will bend until the outer wall of the connecting rod 5 and the inner wall of the vertical groove 11 contact each other).

[0028] Reference Figure 2 and Figure 4 The vertical pole 1 is vertically arranged to the first top plate 22 .

[0029] Reference Figure 4 and Figure 5 The bottom end of the connecting rod 5 is fixedly connected to the inner side of the middle part of the arc-shaped edge of the second top plate 32, thereby avoiding the problem of overload disconnection caused by the bottom end of the connecting rod 5 being connected to the second top plate 32 at the root of the vertical pole 1, thereby improving the connection stability and bearing capacity of the connecting rod 5 and the second top plate 32.

[0030] Reference Figure 3 and Figure 4, the height h1 of the first clamping shell 2 is greater than the height h2 of the second clamping shell 3. When in use, the bottom end of the first arc plate 21 is inserted into the cutting gap (the cutting gap is the gap between the core sample 7 and the base layer, obtained by circumcision of the traditional coring equipment), and the bottom end of the second arc plate 32 is not inserted into the cutting gap. Then the user shakes the vertical pole 1 to use the bottom end of the first arc plate 21 to pry the core sample 7 in the cutting gap, so that the bottom end of the core sample 7 is disconnected from the base layer; then continue to insert the upper part of the first arc plate 21 and the entire second arc plate 31 into the cutting gap to clamp the core sample 7. Compared with a screwdriver, the present invention is easier to insert into the cutting gap. Compared with the solution of grasping a screwdriver and using wrist force to pry the core sample 7, the present invention uses arm force to pry, thereby having a more convenient and labor-saving force application form. The present invention does not need to change tools during operation, thereby simplifying the operation steps and improving operation efficiency.

[0031] Reference Figure 3 and Figure 4 The first arc plate 21 has a first plugging tip 211 at its bottom end, and the second arc plate 31 has a second plugging tip 311 at its bottom end. The first plugging tip 211 enables the first arc plate 21 to be easily inserted into the cutting slit, and the second plugging tip 311 enables the second arc plate 31 to be easily inserted into the cutting slit.

[0032] Reference Figure 5 The handle 6 includes a diagonal support plate 61 and an end plate 62. One end of the diagonal support plate 61 is fixedly connected to the end of the connecting rod 5 (for example, by bolts or welding), and the other end is fixedly connected to the end plate 62 (for example, by bolts or welding). The diagonal support plate 61 is located on the side of the connecting rod 5 and is tilted away from the vertical rod 1, thereby improving the gripping comfort of the user. When using, the user can easily grasp the diagonal support plate 61 of the handle 6. The end plate 62 is used to abut the outer end of the palm of the user to prevent the diagonal support plate 61 from accidentally falling out of the user's hand, thereby improving the safety of the present invention.

[0033] Reference Figure 6 When the present invention needs to be lifted upward: one hand (for example, the left hand) of the user grasps the middle and upper part of the vertical pole 1, and the other hand (for example, the right hand) grasps the handle 6, and the height of the left hand is higher than that of the right hand. The user's two hands simultaneously exert force upward, and the right hand grasping the handle 6 exerts greater force. Since the height of the handle 6 is lower, the user can relatively easily lift up (pull out) the first clamping shell 2, the second clamping shell 3 and the core sample 7.

[0034] Reference Figure 7The first top plate 22 is provided with a connecting riser 222 for injecting water and a freezing fluid (such as liquid nitrogen, nitrogen gas with a temperature below 0 degrees Celsius, and other cryogenic fluids) into the inner cavity of the first clamping shell 2. The first top plate 22 is provided with a top hole 223, and the connecting riser 222 is installed in the top hole 223. When in use, the user first injects water into the inner cavity of the first clamping shell 2 through the connecting riser 222, and water will be retained in the gap between the first clamping shell 2 and the core sample 7, and in the gap between the second clamping shell 3 and the core sample 7; then the freezing fluid is injected into the inner cavity of the first clamping shell 2 through the connecting riser 222, and the water in the gap is quickly frozen, at least the first clamping shell 2 and the core sample 7 can be bonded (the second clamping shell 3 and the core sample 7 may be bonded, depending on the waiting time), thereby avoiding the problem that the core sample 7 cannot be pulled out due to slipping caused by insufficient friction between the present invention and the core sample 7. The original air in the gap between the first clamping shell 2 and the core sample 7, and in the gap between the second clamping shell 3 and the core sample 7, is squeezed out from the bottom under the gas pressure of the freezing fluid and discharged through the top of the cutting gap.

[0035] Since liquid nitrogen freezes water quickly, the present invention needs to be quickly lifted up after liquid nitrogen is injected to remove the core sample 7. If the present invention is lifted up after staying for a period of time, it is possible that the outer wall of the first clamping shell 2 and the outer wall of the second clamping shell 3 will freeze and adhere to the inner wall of the cutting slit, further causing the present invention and the core sample 7 to be unable to be taken out, and it is necessary to wait for the ice between the outer wall of the first clamping shell 2 / the second clamping shell 3 and the cutting slit to melt before it can be taken out (affected by the temperature difference, the ice on the outside of the first clamping shell 2 / the second clamping shell 3 will fuse first, and the ice on the inside will melt later, so there is a time point when the first clamping shell 2 / the second clamping shell 3 can be separated from the cutting slit and frozen with the core sample 7, and this time point is obtained through a limited number of experiments or multiple attempts to lift the present invention for evaluation).

[0036] To avoid freezing too fast, the freezing fluid can be nitrogen at minus 20 degrees Celsius; after the freezing fluid is injected, wait for a certain time before starting the invention, which can slow down the pace of construction work and improve the fluency of the work. The time can be evaluated through a limited number of experiments.

[0037] A pipe body (such as an air pipe or a liquid pipe) is installed at the outlet of the cryogenic fluid storage tank (such as a nitrogen storage tank), and a nozzle is provided at the end of the pipe body. The nozzle can be connected and communicated with the connecting riser 222 (for example, coaxially arranged and then crimped through a threaded ring).

[0038] When the first clamping shell 2 / the second clamping shell 3 has a low fit with the core sample 7, resulting in the gap between them being unable to retain water, the cut gap can be filled with flooding, and then the slow freezing speed of low-temperature nitrogen can be used to slowly freeze the moisture on the inner side of the first clamping shell 2 / the second clamping shell 3, while ensuring that the moisture on the outer side is not frozen, so as to smoothly remove the core sample 7.

[0039] Reference Figure 7 The bottom end of the connecting riser 222 is detachably connected to the inner wall of the top hole 223 through a thread, and an epitaxial fin is provided in the middle and lower part of the connecting riser 222. A sealing ring is sleeved on the outer wall of the bottom end of the connecting riser 222, and then the epitaxial fin and the first top plate 22 are used to clamp the sealing ring, which can achieve sealing and avoid leakage when injecting the refrigerant fluid.

[0040] Reference Figure 7 The connecting riser 222 is installed on the top surface of the first top plate 22 instead of being connected to the first arc plate 21, so the connecting riser 222 will not hinder the first arc plate 21 from being inserted into the cutting gap, thereby improving the smoothness of use of the present invention.

[0041] Reference Figure 7 The height of the bottom end of the connecting riser 222 is not lower than the height of the bottom surface of the first top plate 22. When the core sample 7 is clamped, the problem of the core sample 7 hitting the bottom end of the connecting riser 222 and causing damage to the connecting riser 222 can be avoided.

[0042] Reference Figure 8 and Fig. 9 The present invention also includes a limiting structure 8, which is sleeved on the surface of the vertical rod 1 and the connecting rod 5 and can slide longitudinally; when the limiting structure 8 slides upward, it can reduce the angle between the vertical rod 1 and the connecting rod 5, thereby pushing the first clamping shell 2 and the second clamping shell 3 to clamp the core sample 7. The limiting structure 8 includes a guide sleeve 81 and an extension block 82, the vertical rod 1 is inserted into the extension block 82, and the guide sleeve 81 can slide back and forth along the axial direction of the vertical rod 1 (i.e., longitudinal sliding). The extension block 82 is arranged at the bottom end of the outer wall of the guide sleeve 81, the axial direction of the guide sleeve 81 is perpendicular to the length direction of the extension block 82, and the guide sleeve 81 and the extension block 82 are vertically fixedly connected in an L shape (for example, through an integrated fixed connection); the extension block 82 is provided with a plug-in slot 821, one end of the plug-in slot 821 is connected to the inner cavity of the guide sleeve 81, and the end face of the other end is an arc surface 8211, and the connecting rod 5 is inserted into the plug-in slot 821 in an inclined state. When the limiting structure 8 slides upward, the connection between the connecting rod 5 and the arc surface 8211 changes from a separation state to a crimping state, and then to a compression state, thereby limiting the connection rod 5 and the second clamping shell 3. When the limiting structure 8 slides upward until the connection rod 5 and the arc surface 8211 are compressed, the connection rod 5 and the arc surface 8211 are connected by friction, and the vertical rod 1 and the guide sleeve 81 are connected by friction, thereby preventing the limiting structure 8 from falling downward naturally.

[0043] After the first clamping shell 2 and the second plug-in shell are inserted into the cutting gap, in order to increase the firmness of the freezing, it is necessary to reduce the gap between the first clamping shell 2 and the core sample 7 and the gap between the second clamping shell 3 and the core sample 7 as much as possible, that is, when the user performs freezing operations such as injecting water and injecting refrigerant, the first clamping shell 2 and the second clamping shell 3 need to be in a clamped state, then at least two users are required to perform collaborative operations, resulting in an increase in manpower requirements; to avoid such problems, the limiting structure 8 is slid upward so that the limiting structure 8, the connecting rod 5 and the vertical rod 1 are locked with each other, so that the first clamping shell 2 and the second clamping shell 3 can be clamped, so that the user can free his hands to perform the freezing operation, thereby realizing single-person operation and improving operation convenience.

[0044] The construction method of the pavement base integrity coring device, using the pavement base integrity coring device to take out the core sample 7, comprises the following steps: S1. Grasp the vertical pole 1, and make the vertical pole 1 and the entire road base integrity coring device stand upright.

[0045] S2. Insert the first arc plate 21 into the cutting gap around the core sample 7 without inserting the second arc plate 31; then grasp and shake the vertical pole 1 to drive the first arc plate 21 to shake in the cutting gap, so that the root of the core sample 7 is disconnected from the base layer.

[0046] S3. Insert the first arc plate 21 and the second arc plate 31 into the cutting gaps on the periphery of the core sample 7; then grasp the handle 6 and rotate the connecting rod 5 and the second clamping shell 3 so that the first clamping shell 2 and the second clamping shell 3 clamp the core sample 7.

[0047] S4. Grasp the upright pole 1 and lift it upwards, and at the same time grasp the handle 6 and lift it upwards to extract the core sample 7 in the pavement base.

[0048] Step S3 further comprises: S31, insert the first arc plate 21 and the second arc plate 31 into the cutting gap on the periphery of the core sample 7.

[0049] S32, grasp the handle 6 and rotate the connecting rod 5 and the second clamping shell 3, so that the first clamping shell 2 and the second clamping shell 3 clamp the core sample 7.

[0050] S33, slide the limiting structure 8 upward to lock the connecting rod 5 and the vertical rod 1.

[0051] S34, injecting liquid water into the inner cavity of the first clamping shell 2 through the connecting riser 222.

[0052] S35. Inject a freezing fluid into the inner cavity of the first clamping shell 2 through the connecting riser 222, and the water between the first clamping shell 2 and the core sample 7 freezes into ice, thereby achieving bonding and fixing of the first clamping shell 2 and the core sample 7.

[0053] Reference Figure 7 and Figure 8 When the injection speed of the freezing fluid is too fast, the water in the inner cavity of the first clamping shell 2 is pushed downward, so that the upper and middle part of the inner cavity of the first clamping shell 2 is in a cavity state and cannot be bonded to the core sample 7 by freezing; to avoid such problems, it is necessary to use a freezing fluid storage tank (such as a nitrogen storage tank) with a flow valve to control the injection speed of the freezing fluid in the present invention; or a breathable gap or breathable hole 201 is provided in the upper and middle part of the joint between the first clamping shell 2 and the second clamping shell 3, that is, the upper and middle part of the joint between the first arc plate 21 and the second arc plate 31. After the freezing fluid is injected, it is discharged through the breathable gap or breathable hole 201, thereby avoiding the problem that the liquid level of the water in the first clamping shell 2 is excessively pressed down, resulting in a large number of cavities and the inability to freeze and bond the core sample 7. The outer end of the joint between the first top plate 22 and the second top plate 32 is provided with an exhaust hole. When the water in the cutting gap is flooded, the air gap or the air hole 201 will be immersed in water, and the air gap or the air hole 201 will be easily blocked by frozen ice, so the freezing fluid flows upward and is discharged through the exhaust hole. The exhaust hole is located at the top surface of the first clamping shell 2, so it is not easy to be immersed in water, and thus not easy to be blocked by ice.

[0054] The present invention has a simple structure and reliable functions. The core sample 7 is clamped by the first clamping shell 2 and the second clamping shell 3, thereby having a larger contact area to reduce pressure and avoid the problem that the core sample 7 is damaged due to concentrated force. The first clamping shell 2 is connected to the vertical pole 1, and the second clamping shell 3 is connected to the connecting rod 5. The vertical pole 1 and the connecting rod 5 are arranged crosswise in an X shape. A handle 6 is provided at the end of the connecting rod 5. After the user grasps the handle 6 and the vertical pole 1, the core sample 7 is clamped by the arm strength rather than the gripping strength of the fingers, thereby having a simpler and more convenient operation form.

[0055] The connecting rod 5 is arranged perpendicularly to the straight edge of the first top plate 22 / the second top plate 32, and the bottom end of the connecting rod 5 is fixedly connected to the inner side of the middle part of the arc-shaped edge of the second top plate 32, which can avoid unbalanced load between the vertical rod 1 and the second clamping shell 3, thereby improving the clamping stability and comfort, and increasing the service life of the present invention.

[0056] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" 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, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. A road base integrity coring device, characterized by: The invention comprises a vertical pole (1), a first clamping shell (2), a second clamping shell (3), a connecting rod (5) and a handle (6); the first clamping shell (2) is fixedly mounted on the bottom end of the vertical pole (1); the second clamping shell (3) is rotatably connected to the first clamping shell (2); the connecting rod (5) is arranged obliquely and the bottom end is fixedly connected to the second clamping shell (3) and the top end is fixedly connected to the handle (6); the vertical pole (1) and the connecting rod (5) are arranged crosswise in an X shape.

2. The pavement base integrity coring device according to claim 1, characterized in that: The first clamping shell (2) comprises a first arc plate (21) and a first top plate (22) arranged at the top end of the first arc plate (21), and the second clamping shell (3) comprises a second arc plate (31) and a second top plate (32) arranged at the top end of the second arc plate (31); the first top plate (22) and the second top plate (32) are both semicircular; the first top plate (22) and the second top plate (32) are spliced ​​together to form a full circle and are connected via a hinge (4).

3. The pavement base integrity coring device according to claim 2, characterized in that: The openings of the first arc plate (21) and the second arc plate (31) are arranged opposite to each other.

4. The pavement base integrity coring device according to claim 3, characterized in that: A semicircular convex plate (221) is connected to the middle of the straight edge of the first top plate (22), a semicircular groove (321) is connected to the middle of the straight edge of the second top plate (32), and the semicircular convex plate (221) is matched with the semicircular groove (321); the bottom end surface of the upright pole (1) is fixedly connected to the first top plate (22) and the semicircular convex plate (221).

5. The pavement base integrity coring device according to claim 4, characterized in that: A vertical groove (11) is provided at the middle and lower part of the vertical rod (1); the vertical groove (11) is a through groove structure with openings at both left and right ends; the middle part of the connecting rod (5) is inserted into the vertical groove (11).

6. The pavement base integrity coring device according to claim 5, characterized in that: The bottom end of the connecting rod (5) is fixedly connected to the inner side of the middle part of the arc-shaped edge of the second top plate (32).

7. The pavement base integrity coring device according to claim 6, characterized in that: The height of the first clamping shell (2) is greater than the height of the second clamping shell (3).

8. The pavement base integrity coring device according to claim 7, characterized in that: A first plugging tip (211) is provided at the bottom end of the first arc plate (21); and a second plugging tip (311) is provided at the bottom end of the second arc plate (31).

9. A construction method for a road base integrity coring device, characterized in that: The steps of taking out the core sample (7) using the pavement base integrity coring device according to claim 8 include: S1, grasping the vertical pole (1) to make the vertical pole (1) stand upright; S2, inserting the first arc plate (21) into the cutting gap on the periphery of the core sample (7), while not inserting the second arc plate (31); then grasping and shaking the vertical pole (1) to disconnect the root of the core sample (7) from the base layer; S3, inserting the first arc plate (21) and the second arc plate (31) into the cutting slits on the periphery of the core sample (7); then grasping the handle (6) and rotating the connecting rod (5) and the second clamping shell (3), so that the first clamping shell (2) and the second clamping shell (3) clamp the core sample (7); S4. Grasp the upright pole (1) and lift it upwards, and at the same time grasp the handle (6) and lift it upwards to extract the core sample (7).

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