Pile foundation sampling device for road and bridge construction

Abstract

The invention discloses a pile foundation sampling device for road and bridge construction, and relates to the field of pile foundation sampling, the pile foundation sampling device comprises a bottom plate, a drill cylinder and a top block, the top block is located at the top end of the drill cylinder, six insertion grooves are uniformly formed in the inner wall of the drill cylinder, dehydration assemblies are inserted into the six insertion grooves, and the dehydration assemblies are used for dehydrating the pile foundation by using the rotating power of the drill cylinder and the axial feeding force of a sample core. A first flange plate is fixed at the top end of the outer wall of the drilling cylinder; according to the invention, sampling and dewatering can be synchronously carried out by using the rotating power of the drill cylinder and the axial feeding force of the sample core, water on the surface of the sample core can be immediately scraped, sewage in the drill cylinder can be rapidly pumped and drained, and the sampling and dewatering efficiency is improved. Therefore, the moisture is prevented from damaging the components and the structure of the sample core, and the accuracy of data such as subsequent strength detection and component analysis is ensured.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of pile foundation sampling, in particular to a pile foundation sampling device for construction of roads and bridges. BACKGROUND

[0002] In the construction process of large infrastructure such as roads and bridges, pile foundation as a basic component to bear the load of the overall structure, its construction quality is directly related to the safety and long-term stability of the entire project. If the pile foundation has defects or insufficient strength, it may lead to uneven settlement, structure cracking and even collapse and other serious consequences. Therefore, in order to ensure that the engineering quality meets the design requirements and safety standards, accurate, scientific and reliable sampling detection of pile foundation becomes an indispensable key link in the construction process.

[0003] A pile foundation detection core sampling device described in the prior art comprises a rack mechanism, including a base, a support is arranged on the top of the base, a driving part is arranged in the support, a moving part is arranged on the outside of the base; the base comprises a cylinder arranged at the bottom, the number of cylinders is two, the piston rod of the cylinder is fixedly connected with an extension rod, one end of the extension rod is fixedly connected with a clamping plate, an anti-skid protrusion is arranged on the inner wall of the clamping plate; a sampling mechanism, including a support plate arranged on one side of the driving part, a first motor is arranged above the support plate, the output end of the first motor is fixedly connected with a rotating rod, the bottom of the rotating rod is fixedly connected with a connecting block, and the bottom of the connecting block is provided with a core barrel.

[0004] The above technology has the advantages of improving the core sampling efficiency, facilitating the movement and fixation, and cooling the drill bit. However, the residual cooling water may cause the soluble substances on the surface of the sample core to dissolve and the bonding force between the aggregate and the cement paste to weaken, thereby causing the subsequent detection results to be distorted. Meanwhile, the mixture of water and cutting debris will increase the frictional resistance between the sample core and the inner wall of the core barrel. SUMMARY

[0005] Therefore, the present application aims to provide a pile foundation sampling device for construction of roads and bridges to solve the technical problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The utility model provides a kind of pile foundation sampling device for building road bridge, including bottom plate, drill cylinder and top block, the hole is opened in the bottom plate, the drill cylinder is located above hole, the top block is located at the top end of drill cylinder, the inner wall of drill cylinder is evenly provided with six insertion slots, six The water removal assembly is inserted in the insertion slot, the water removal assembly utilizes the rotary power of drill cylinder and the axial feed force of sample core, completes the moisture removal of sample core surface, the inner bottom wall of drill cylinder is evenly provided with six flow guide grooves, the wall of drill cylinder is located between six insertion slots It is provided with the through hole corresponding with flow guide groove, six The suction tube is inserted in the through hole. The outer wall of the top block is movably provided with a horizontal plate through a bearing, the lower surface of the top block is evenly provided with six arc-shaped positioning grooves, the top block is provided with a through hole between the six positioning grooves, the top end of each suction tube is matched with the corresponding through hole, the top end of the top block is provided with a flow guide drainage assembly, the flow guide drainage assembly is used to drain and collect the sewage collected in the inner bottom wall of the drill cylinder, reducing the frictional resistance between the sample core and the inner wall of the drill cylinder, the outer wall of the top block is fixed with a second flange plate, and the first flange plate and the second flange plate are fixed by bolts.

[0007] Specifically, each water removal assembly includes an arc-shaped insertion plate, which is slidably connected with the insertion slot, a first mounting groove is formed in the wall body of the sample core facing the arc-shaped insertion plate, a resilient sheet is arranged in the first mounting groove, the fixed sheet of the resilient sheet is fixedly connected with the first mounting groove by screws, the opening of the resilient sheet faces upward, the movable sheet of the resilient sheet is arc-shaped and integrally provided with a fixed plate at the top, and a silica gel water scraping knife is fixed to the outer wall of the sample core facing the fixed plate.

[0008] Specifically, the movable sheet of the resilient sheet is evenly provided with three drainage holes at the bottom, and the cutting edge of the silica gel water scraping knife is provided with a micro-tooth structure.

[0009] Specifically, the top end of the arc-shaped insertion plate is integrally provided with a positioning arc plate, and the positioning arc plate is connected with the positioning groove.

[0010] Specifically, a second mounting groove is formed above the first mounting groove in the wall body of the sample core facing the arc-shaped insertion plate, a mounting plate is fixed in the second mounting groove by screws, and a water-absorbing sponge is bonded to the outer wall of the sample core facing the mounting plate.

[0011] Specifically, the flow guide drainage assembly includes a ring-shaped pipe, the ring-shaped pipe is fixed to the top end of the top block by a support, the lower surface of the ring-shaped pipe is evenly connected with six vertical pipes, the bottom end of the six vertical pipes is inserted into the through hole and connected with the top end of the corresponding suction tube in a sealed manner.

[0012] Specifically, in this technical solution, L-shaped plates are symmetrically welded to the upper surface of the horizontal plate, and liquid storage tanks are fixed to the top of the two L-shaped plates by screws. A water pump is installed on the inner wall of the liquid storage tank, and a flexible hose is connected to the inner wall of the annular pipe. The top of the flexible hose passes through the wall of the liquid storage tank and is connected to the suction port of the water pump.

[0013] Specifically, in this technical solution, a driven gear is fixedly sleeved on the outer wall of the top block below the horizontal plate. A drive motor is installed on the upper surface of the horizontal plate on one side of an L-shaped plate by screws. The output end of the drive motor extends through the horizontal plate to the bottom, and a driving gear is fixedly sleeved on the outer wall of the output end of the drive motor. The tooth surface of the driving gear meshes with the tooth surface of the driven gear.

[0014] Specifically, in this technical solution, vertical plates are welded to both sides of the upper surface of the base plate, and guide grooves are opened on both vertical plates facing the outer wall of the drill barrel. Slide plates are integrally fixed at both ends of the horizontal plate, and the slide plates are slidably arranged in the guide grooves. A hydraulic cylinder is fixed to the upper surface of the base plate between the drill barrel and the two vertical plates by bolts, and the extension and retraction ends of the two hydraulic cylinders are fixed to the lower surface of the horizontal plate by bolts.

[0015] Specifically, in this technical solution, a water tank is fixed on the upper surface of the base plate on one side of the drill barrel, a water pump is installed in the water tank, and a nozzle connected to the water pump pipe is provided above the hole near the water tank.

[0016] In summary, the present invention has the following advantages: by using the dehydration component and the drainage component, sampling and dehydration can be carried out simultaneously by utilizing the rotational power of the drill barrel and the axial feeding force of the core sample. This allows for the immediate removal of moisture from the surface of the core sample and the rapid extraction of wastewater from the drill barrel, thereby avoiding damage to the composition and structure of the core sample by water and ensuring the accuracy of subsequent strength testing, composition analysis and other data. Furthermore, the timely discharge of wastewater and debris can reduce the frictional resistance between the core sample and the inner wall of the drill barrel, making the sampling process smoother. The dehydration component adopts a plug-in design, which facilitates the replacement of worn parts and ensures the stability and reliability of the dehydration effect. At the same time, the drainage component also realizes the centralized collection and recycling of cooling wastewater, avoiding water waste and reducing construction water consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the separate structure of the drill barrel, top block, and flow diversion and drainage assembly of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the drill barrel of the present invention; Figure 4 This is a schematic diagram of the dehydration component structure of the present invention; Figure 5 This is a schematic diagram of the top block and horizontal plate structure of the present invention; Figure 6 This is a schematic diagram of the top block structure of the present invention from a bottom view; Figure 7 This is a bottom view of the drainage component of the present invention.

[0018] Attached Figure Descriptions: 1. Base plate; 101. Water tank; 102. Hole; 103. Vertical plate; 1031. Guide chute; 104. Hydraulic cylinder; 105. Horizontal plate; 1051. Slide plate; 2. L-shaped plate; 3. Drill barrel; 301. Insertion groove; 302. First flange; 303. Flow guide groove; 304. Through hole; 4. Dewatering assembly; 401. Arc-shaped insert plate; 402. First mounting groove; 403. Second mounting groove; 404. Elastic sheet; 4 041. Fixing plate; 4042. Silicone squeegee; 4043. Drain hole; 405. Mounting plate; 4051. Absorbent sponge; 406. Positioning arc plate; 5. Suction pipe; 6. Top block; 601. Positioning groove; 602. Perforation; 603. Second flange; 604. Driven gear; 7. Drainage guide assembly; 701. Annular pipe; 702. Vertical pipe; 703. Hose; 704. Liquid storage tank; 8. Drive motor; 801. Drive gear. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The embodiments of the present invention will now be described.

[0021] It should be noted that all electrical components in this application are electrically connected to an external power source and operated via control switches. In addition, clear indicator lights and control buttons are provided on the operation panel of the device to facilitate operators to understand the working status of the electrical components in real time and to perform corresponding operations according to the actual situation.

[0022] In this embodiment, please refer to Figure 1 - Figure 7As shown, a pile foundation sampling device for road and bridge construction includes a base plate 1, a drill cylinder 3, and a top block 6. The base plate 1 has four casters at its lower corners for easy movement. Holes 102 are formed in the base plate 1. The drill cylinder 3 is located above the holes 102, and the top block 6 is located at the top of the drill cylinder 3. A water tank 101 is fixed to the upper surface of the base plate 1, on one side of the drill cylinder 3. A water pump is installed inside the water tank 101. A nozzle connected to the water pump pipe is located above the holes 102 near the water tank 101. The inner wall of the drill cylinder 3... Six insertion slots 301 are evenly provided, and a dehydration component 4 is inserted into each of the six insertion slots 301. The dehydration component 4 uses the rotational power of the drill cylinder 3 and the axial feeding force of the sample core to remove water from the surface of the sample core. Six guide grooves 303 are evenly provided on the inner bottom wall of the drill cylinder 3. Through holes 304 corresponding to the guide grooves 303 are provided between the six insertion slots 301 on the cylinder wall of the drill cylinder 3. Suction pipes 5 are inserted into each of the six through holes 304. A first flange 302 is fixed to the top of the outer wall of the drill cylinder 3. A horizontal plate 105 is movably fitted onto the outer wall of the top block 6 via a bearing. Six arc-shaped positioning grooves 601 are evenly opened on the lower surface of the top block 6. A through hole 602 is opened between the six positioning grooves 601 on the top block 6. The top end of each suction pipe 5 matches the corresponding through hole 602. A flow guiding and drainage assembly 7 is provided at the top of the top block 6. The flow guiding and drainage assembly 7 is used to extract and collect the sewage that gathers on the bottom wall of the drill barrel 3, thereby reducing the frictional resistance between the core sample and the inner wall of the drill barrel 3. A second flange 603 is fixed to the outer wall of the top block 6. The first flange 302 and the second flange 603 are fixed by bolts. A driven gear 604 is fixedly fitted on the outer wall of the top block 6 below the horizontal plate 105. A drive motor 8 is installed on the upper surface of the horizontal plate 105 on one side of an L-shaped plate 2 by screws. The output end of the drive motor 8 extends through the horizontal plate 105 to the bottom. An active gear 801 is fixedly fitted on the outer wall of the output end of the drive motor 8. The tooth surface of the active gear 801 meshes with the tooth surface of the driven gear 604. Vertical plates 103 are welded to both sides of the upper surface of the bottom plate 1. Guide grooves 1031 are opened on both vertical plates 103 facing the outer wall of the drill barrel 3. Slide plates 1051 are integrally fixed at both ends of the horizontal plate 105. The slide plates 1051 are slidably arranged in the guide grooves 1031. A hydraulic cylinder 104 is fixed on the upper surface of the bottom plate 1 between the drill barrel 3 and the two vertical plates 103 by bolts. The telescopic ends of the two hydraulic cylinders 104 are fixed to the lower surface of the horizontal plate 105 by bolts.

[0023] Before sampling the pile foundations for road and bridge construction, the operator moves the device to the sampling point, aligning the hole 102 of the base plate 1 with the sampling center, and ensuring that the axis of the drill barrel 3 is vertically aligned with the sampling point. Then, the sampling program is started via an external controller, driving the motor 8 to work. Its output drives the drive gear 801 to rotate, which in turn drives the driven gear 604 to rotate through gear meshing. This, in turn, drives the top block 6 and the drill barrel 3 to rotate synchronously around their own axis. Simultaneously, the two hydraulic cylinders 104 retract synchronously, extending and retracting... The end drives the horizontal plate 105 to move down. The horizontal plate 105 slides down along the guide groove 1031 of the vertical plate 103 via the slide plate 1051, which drives the rotating drill barrel 3 and the top block 6 to move down synchronously, so that the bottom of the rotating drill barrel 3 contacts the pile foundation surface. Under the action of cutting force, the core sample enters the drill barrel 3 along the axis of the drill barrel 3. This causes the water pump in the water tank 101 to work, and water is transported through the pipe to the nozzle above the hole 102. The nozzle continuously sprays water into the drilling area of ​​the drill barrel 3 to reduce the cutting temperature and suppress dust. Once the core sample enters the drill barrel 3, as the drill barrel 3 rotates and the core sample is fed axially, the dewatering component 4 begins to function. The silicone scraper 4042 scrapes away the water on the surface of the core sample, and the absorbent sponge 4051 absorbs some of the residual water, ensuring that the water on the surface of the core sample can be removed as much as possible, thus avoiding the dissolution of soluble substances on the surface of the core sample and the weakening of the bond between the aggregate and the cement paste. At the same time, the drainage component 7 works to extract the sewage that has gathered at the bottom of the drill barrel 3 and transport it to the storage tank 704 for centralized collection. This not only avoids water from damaging the composition and structure of the sample core and ensures the accuracy of subsequent strength test data, but also discharges sewage and debris in time, effectively reducing the frictional resistance between the sample core and the inner wall of the drill barrel 3, making the whole sampling process smoother and more efficient. When the sampling depth reaches the preset value, the external controller sequentially shuts down the water pump and drive motor 8 in the water tank 101, stopping the water spraying and the rotation of the drill cylinder 3. Then, it controls the extension end of the hydraulic cylinder 104 to drive the horizontal plate 105, the drill cylinder 3 and the top block 6 to synchronously return to the upward position until the drill cylinder 3 is completely detached from the pile foundation surface. The operator then removes the bolts between the first flange 302 and the second flange 603, separates the top block 6 from the drill cylinder 3, and can then take out the complete sample core inside the drill cylinder 3 for subsequent quality inspection and analysis.

[0024] Please see Figure 4As shown, each dehydration component 4 includes an arc-shaped insert plate 401. The top of the arc-shaped insert plate 401 is integrally provided with a positioning arc plate 406. The positioning arc plate 406 is inserted into the positioning groove 601. The arc-shaped insert plates 401 are all inserted into the insertion groove 301 and are slidably connected. The bottom of the wall facing the sample core of the arc-shaped insert plate 401 is provided with a first mounting groove 402. The first mounting groove 402 is provided with an elastic piece 404 at a 30° angle. The fixing piece of the elastic piece 404 is fixedly connected to the first mounting groove 402 by screws. The opening of the elastic piece 404 is upward. The movable piece of the elastic piece 404 is arc-shaped and is integrally provided with a fixing plate 4041 at the top. The fixing plate 4041 is fixed with a silicone scraper 4042 facing the outer wall of the sample core. The bottom of the movable piece of the elastic piece 404 is evenly provided with three drainage holes 4043. The blade of the silicone scraper 4042 is provided with a micro-tooth structure. The arc-shaped insert plate 401 facing the sample core has a second mounting groove 403 above the first mounting groove 402. A mounting plate 405 is fixed in the second mounting groove 403 by screws. An absorbent sponge 4051 is adhered to the outer wall of the mounting plate 405 facing the sample core.

[0025] When the core sample enters the drill barrel 3 upwards along its axis, the elastic plate 404, with its 30° upward opening, generates a radial thrust on the movable plate of the elastic plate 404. Combined with the centrifugal force generated by the rotation of the drill barrel 3, this causes the movable plate of the elastic plate 404 to tightly adhere to the core sample surface. The micro-toothed silicone scraper 4042 on the top fixing plate 4041 performs a spiral scraping motion as the drill barrel 3 rotates, removing water and adhering mud from the core sample surface. During the scraping process, some water will... The liquid gathers in the angle between the movable and fixed plates of the elastic sheet 404 and flows downward through the three drainage holes 4043. As the sample core continues to move upward, after being scraped by the silicone squeegee 4042, the surface of the sample core will come into contact with the absorbent sponge 4051. The absorbent sponge 4051 further absorbs the residual moisture on the surface of the sample core, reducing the water content on the surface of the sample core. Moreover, the absorbent sponge 4051 is soft in texture and will not damage the surface of the sample core while absorbing moisture, thus ensuring the integrity of the sample core. Throughout the sampling process, the silicone squeegee 4042 and the absorbent sponge 4051 work together. The silicone squeegee 4042 first removes most of the water, and the absorbent sponge 4051 then carefully absorbs the remaining water. The two work together to greatly improve the dehydration effect. Because the dehydration component 4 adopts a plug-in design, if the silicone scraper 4042 or the absorbent sponge 4051 wears out or reaches the end of its service life, the operator can easily and quickly remove the arc-shaped insert plate 401 from the plug-in slot 301 and replace it with a new silicone scraper 4042 or absorbent sponge 4051, ensuring that the dehydration component 4 can still maintain a good dehydration effect in the next sampling.

[0026] Please see Figure 2 and Figure 7 As shown, the drainage component 7 includes an annular pipe 701, which is fixed to the top of the top block 6 by a bracket. Six vertical pipes 702 are evenly connected to the lower surface of the annular pipe 701. The bottom ends of the six vertical pipes 702 are inserted into the perforations 602 and connected to the top of the corresponding suction pipes 5 in a sealed manner. L-shaped plates 2 are symmetrically welded to the upper surface of the horizontal plate 105. The top ends of the two L-shaped plates 2 are fixed to the liquid storage tanks 704 by screws. A water pump is installed on the inner wall of the liquid storage tanks 704. A flexible hose 703 is connected to the inner wall of the annular pipe 701. The top end of the flexible hose 703 passes through the wall of the liquid storage tank 704 and is connected to the suction port of the water pump.

[0027] During core drilling, the external controller simultaneously starts the water pump in the storage tank 704. Through the hose 703, a negative pressure suction force is formed in the annular pipe 701, which acts on the vertical pipe 702 and the suction pipe 5. The sewage collected on the bottom wall of the drill barrel 3 enters the guide channel 303. Through the suction force generated by the bottom opening of the suction pipe 5, it enters the vertical pipe 702 and the annular pipe 701, and is then transported to the storage tank 704 through the hose 703. This achieves centralized collection of sewage and debris, and timely discharge of sewage and debris from the drill barrel 3. It can reduce the frictional resistance between the core and the inner wall of the drill barrel 3, making the rotation of the drill barrel 3 smoother, reducing equipment wear and energy consumption. At the same time, the centralized collected sewage can be further treated to achieve water resource recycling and reduce construction costs.

[0028] The working principle of this invention is as follows: Before sampling the pile foundations for road and bridge construction, the operator moves the device to the sampling point, aligning the hole 102 of the base plate 1 with the sampling center, and ensuring that the axis of the drill barrel 3 is vertically aligned with the sampling point. Then, the sampling program is started via an external controller, driving the motor 8 to work. Its output drives the drive gear 801 to rotate, which in turn drives the driven gear 604 to rotate through gear meshing. This, in turn, drives the top block 6 and the drill barrel 3 to rotate synchronously around their own axis. Simultaneously, the two hydraulic cylinders 104 retract synchronously, extending and retracting... The end drives the horizontal plate 105 to move down. The horizontal plate 105 slides down along the guide groove 1031 of the vertical plate 103 via the slide plate 1051, which drives the rotating drill barrel 3 and the top block 6 to move down synchronously, so that the bottom of the rotating drill barrel 3 contacts the pile foundation surface. Under the action of cutting force, the core sample enters the drill barrel 3 along the axis of the drill barrel 3. This causes the water pump in the water tank 101 to work, and water is transported through the pipe to the nozzle above the hole 102. The nozzle continuously sprays water into the drilling area of ​​the drill barrel 3 to reduce the cutting temperature and suppress dust. When the core sample enters the drill barrel 3, the rotation of the drill barrel 3 and the axial feeding of the core sample cause the core sample to exert a radial thrust on the movable plate of the elastic plate 404. Combined with the centrifugal force generated by the rotation of the drill barrel 3, the movable plate of the elastic plate 404 tightly adheres to the surface of the core sample. The micro-toothed silicone scraper 4042 on the top fixed plate 4041 performs a spiral scraping motion with the rotation of the drill barrel 3, scraping away the water and attached mud on the surface of the core sample. During the scraping process, some water will gather in the angle between the movable plate and the fixed plate of the elastic plate 404 and will flow downward through the three drainage holes 4043. As the core sample continues to move upward, after being scraped by the silicone scraper 4042, the surface of the core sample will also come into contact with the water-absorbing sponge 4051. The water-absorbing sponge 4051 further absorbs the residual water on the surface of the core sample, reducing the water content on the surface of the core sample. During core drilling, the wastewater collected on the bottom wall of the drill barrel 3 will enter the guide channel 303. The external controller will simultaneously start the water pump in the storage tank 704. Through the hose 703, a negative pressure suction force will be formed in the annular pipe 701, which will act on the vertical pipe 702 and the suction pipe 5. The suction force generated at the bottom of the suction pipe 5 will enter the vertical pipe 702 and the annular pipe 701, and then be transported to the storage tank 704 through the hose 703, so as to achieve centralized collection of wastewater and debris. When the sampling depth reaches the preset value, the external controller sequentially shuts down the water pump and drive motor 8 in the water tank 101, stopping the water spraying and the rotation of the drill cylinder 3. Then, it controls the extension end of the hydraulic cylinder 104 to drive the horizontal plate 105, the drill cylinder 3 and the top block 6 to synchronously return to the upward position until the drill cylinder 3 is completely detached from the pile foundation surface. The operator then removes the bolts between the first flange 302 and the second flange 603, separates the top block 6 from the drill cylinder 3, and can then take out the complete sample core inside the drill cylinder 3 for subsequent quality inspection and analysis.

[0029] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A pile foundation sampling device for road and bridge construction, comprising a base plate (1), a drill cylinder (3), and a top block (6), wherein the base plate (1) has a hole (102), the drill cylinder (3) is located above the hole (102), and the top block (6) is located at the top of the drill cylinder (3), characterized in that, The inner wall of the drill barrel (3) is evenly provided with six insertion slots (301), and a dehydration component (4) is inserted into each of the six insertion slots (301). The dehydration component (4) uses the rotational power of the drill barrel (3) and the axial feeding force of the sample core to remove water from the surface of the sample core. The inner bottom wall of the drill barrel (3) is evenly provided with six guide grooves (303). The cylinder wall of the drill barrel (3) is provided with through holes (304) corresponding to the guide grooves (303) between the six insertion slots (301). A suction pipe (5) is inserted into each of the six through holes (304). A first flange (302) is fixed at the top of the outer wall of the drill barrel (3). The outer wall of the top block (6) is fitted with a horizontal plate (105) through a bearing. The lower surface of the top block (6) is evenly provided with six arc-shaped positioning grooves (601). The top block (6) is provided with perforations (602) between the six positioning grooves (601). The top end of each suction tube (5) matches the corresponding perforation (602). The top end of the top block (6) is provided with a flow guiding and drainage component (7). The flow guiding and drainage component (7) is used to extract and collect the sewage that gathers on the bottom wall of the drill barrel (3) and reduce the frictional resistance between the core sample and the inner wall of the drill barrel (3). The outer wall of the top block (6) is fixed with a second flange (603). The first flange (302) and the second flange (603) are fixed with bolts.

2. The pile foundation sampling device for road and bridge construction according to claim 1, characterized in that, Each of the dehydration components (4) includes an arc-shaped insert plate (401), which is inserted into and slidably connected to the insertion groove (301). The arc-shaped insert plate (401) has a first mounting groove (402) at the bottom of the wall facing the sample core. The first mounting groove (402) has an elastic piece (404) at a 30° angle. The fixing piece of the elastic piece (404) is fixedly connected to the first mounting groove (402) by screws. The opening of the elastic piece (404) is upward. The movable piece of the elastic piece (404) is arc-shaped and has a fixing plate (4041) integrally provided on the top. The fixing plate (4041) has a silicone scraper (4042) fixed to the outer wall of the sample core.

3. A pile foundation sampling device for road and bridge construction according to claim 2, characterized in that, The bottom of the movable piece of the elastic sheet (404) is evenly provided with three drainage holes (4043), and the cutting edge of the silicone squeegee (4042) is provided with a micro-tooth structure.

4. A pile foundation sampling device for road and bridge construction according to claim 2, characterized in that, The top of the arc-shaped insert (401) is integrally provided with a positioning arc plate (406), which is connected to the positioning groove (601).

5. A pile foundation sampling device for road and bridge construction according to claim 2, characterized in that, The arc-shaped insert (401) has a second mounting groove (403) above the first mounting groove (402) on the wall facing the sample core. A mounting plate (405) is fixed in the second mounting groove (403) by screws. A water-absorbing sponge (4051) is adhered to the outer wall of the mounting plate (405) facing the sample core.

6. A pile foundation sampling device for road and bridge construction according to claim 1, characterized in that, The drainage component (7) includes an annular pipe (701), which is fixed to the top of the top block (6) by a bracket. Six vertical pipes (702) are evenly connected to the lower surface of the annular pipe (701). The bottom ends of the six vertical pipes (702) are inserted into the perforations (602) and sealed with the top of the corresponding suction pipes (5).

7. A pile foundation sampling device for road and bridge construction according to claim 6, characterized in that, The upper surface of the horizontal plate (105) is symmetrically welded with L-shaped plates (2). The top ends of the two L-shaped plates (2) are fixed with liquid storage tanks (704) by screws. A water pump is installed on the inner wall of the liquid storage tank (704). The inner wall of the annular pipe (701) is connected to a flexible hose (703). The top end of the flexible hose (703) penetrates the wall of the liquid storage tank (704) and is connected to the suction port of the water pump.

8. A pile foundation sampling device for road and bridge construction according to claim 1, characterized in that, The outer wall of the top block (6) is fixedly fitted with a driven gear (604) below the horizontal plate (105). The upper surface of the horizontal plate (105) is located on one side of an L-shaped plate (2) and a drive motor (8) is installed by screws. The output end of the drive motor (8) extends through the horizontal plate (105) to the bottom. The outer wall of the output end of the drive motor (8) is fixedly fitted with a driving gear (801). The tooth surface of the driving gear (801) meshes with the tooth surface of the driven gear (604).

9. A pile foundation sampling device for road and bridge construction according to claim 1, characterized in that, Vertical plates (103) are welded to both sides of the upper surface of the base plate (1). The two vertical plates (103) facing the outer wall of the drill barrel (3) are provided with guide grooves (1031). The two ends of the horizontal plate (105) are integrally fixed with sliding plates (1051). The sliding plates (1051) are slidably arranged in the guide grooves (1031). The upper surface of the base plate (1) is located between the drill barrel (3) and the two vertical plates (103) and is fixed with hydraulic cylinders (104) by bolts. The extension and retraction ends of the two hydraulic cylinders (104) are fixed with bolts to the lower surface of the horizontal plate (105).

10. A pile foundation sampling device for road and bridge construction according to claim 1, characterized in that, A water tank (101) is fixed on the upper surface of the base plate (1) on one side of the drill barrel (3). A water pump is installed in the water tank (101). A nozzle connected to the water pump pipe is provided above the hole (102) near the water tank (101).

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