Soil layer sampling device for bridge construction engineering geological exploration

Abstract

The invention relates to the technical field of sampling devices, and discloses a soil layer sampling device for bridge construction engineering geological exploration, comprising: a first sleeve, a sinker bar slidably connected in the first sleeve, the top end of the sinker bar being connected with a heavy hammer; the bottom end of the first sleeve is in threaded connection with a second sleeve, and the inner wall of the second sleeve is in sliding connection with a sliding shaft; the bottom end of the second sleeve is in threaded connection with a connecting seat, and the bottom of the connecting seat is rotationally connected with a sampling tube; a rotating mechanism is arranged in the connecting seat; and a sample discharging assembly is arranged in the sampling pipe. Through the cooperation of the first sleeve, the second sleeve, the connecting seat and the sampling pipe, a worker can adapt to sampling operation of different soil layer depths by increasing or decreasing the number of the second sleeve, disassembly and assembly are relatively convenient, and flexible assembly according to actual requirements is facilitated.

Description

Technical Field

[0001] This invention relates to the field of sampling device technology, specifically to a soil sampling device for geological exploration in bridge construction projects. Background Technology

[0002] In bridge construction, foundation stability is a core factor determining the overall safety and service life of a bridge. Therefore, it is necessary to conduct regular engineering geological exploration to determine the distribution of the original soil layers and backfill soil layers, as well as key parameters such as soil bearing capacity and compressibility. This provides a scientific basis for bridge foundation design, construction plan formulation, and project quality control. Soil sampling devices are the core equipment for geological exploration. Existing soil sampling devices mainly consist of a sampling tube and a telescopic rod connected to the top. The telescopic rod is equipped with a counterweight sleeve. In actual operation, the sampling tube is first inserted into the soil layer at the exploration point. Then, the counterweight sleeve is slid upwards, and its weight causes it to fall and strike the end of the telescopic rod. After repeated impact operations, the sampling tube gradually penetrates into the target depth of the soil layer. Finally, the sampling tube is pulled out, and a soil sample at the corresponding depth can be retained inside.

[0003] However, the existing technology has the following problems: In practical use, existing soil sampling devices typically have a fixed length of telescopic rod. However, there are two operating modes: surface soil sampling and borehole sampling. Furthermore, borehole sampling involves various sampling depths, making it difficult for a single-specification sampling device to meet the sampling needs at different depths. Using multiple specifications of sampling devices would increase equipment costs and make them cumbersome to carry. Summary of the Invention

[0004] The purpose of this invention is to provide a soil sampling device for geological exploration in bridge construction projects in order to solve the above-mentioned problems and overcome the defects of the prior art, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a soil sampling device for geological exploration in bridge construction projects, comprising: a first sleeve, a striking rod slidably connected inside the first sleeve, and a weight connected to the top of the striking rod; a second sleeve threadedly connected to the bottom of the first sleeve, and a sliding shaft slidably connected to the inner wall of the second sleeve; a connecting seat threadedly connected to the bottom of the second sleeve, and a sampling tube rotatably connected to the bottom of the connecting seat; a rotating mechanism provided inside the connecting seat, which can drive the sampling tube to rotate using the impact force of the sliding shaft; and a sample ejection component provided inside the sampling tube for ejecting the sample after sampling is completed.

[0006] Preferably, the bottom end of the striking rod can protrude from the bottom of the first sleeve and strike the sliding shaft below it. Multiple second sleeves are provided, and multiple second sleeves can be connected by threads. A spring is provided between the sliding shaft and the inner wall of the second sleeve. The sliding shafts in the multiple threaded second sleeves abut against each other in sequence.

[0007] Preferably, the rotating mechanism includes a slide rod, which is vertically slidably connected to the inner wall of the connecting seat. The bottom of the slide rod is unidirectionally rotatably connected to a rotating seat. Multiple ball-head rods are connected to the outer wall of the rotating seat. The top of the sampling tube is provided with a cavity. Multiple arc-shaped grooves are opened on the inner wall of the cavity of the sampling tube. A ball head is provided at the end of the ball-head rod away from the rotating seat. The ball heads of the multiple ball-head rods are slidably connected to the multiple arc-shaped grooves respectively. A magnetic block is connected to the top of the slide rod. The magnetic block is magnetically attracted to the bottom end of the slide shaft.

[0008] Preferably, a ratchet and pawl mechanism is provided between the slide rod and the rotating seat, and a limiting structure is provided between the slide rod and the inner wall of the connecting seat to restrict the rotation of the slide rod.

[0009] Preferably, the plurality of the arc-shaped grooves are arranged in a circumferential array, the arc-shaped grooves are spiral-shaped, and the sampling tube can be rotated by the arc-shaped grooves when the ball head rod moves down. A ring of teeth is installed on the bottom edge of the sampling tube.

[0010] Preferably, the sampling assembly includes a slide plate, which is vertically slidably connected to the inner wall of the sampling tube. Two sliding arms are slidably connected through the inner wall of the slide plate. Two longitudinal grooves are provided on the sampling tube. The two sliding arms pass through the two longitudinal grooves respectively. The two sliding arms are mirror images of each other and can be pulled outward. A finger groove is provided at the end of the sliding arm away from the slide plate.

[0011] Preferably, a display component is also included, comprising a slip ring, a first slide, and a second slide. The slip ring is vertically slidably connected to the inner wall of the connecting seat. The first slide is slidably connected to the outer wall of the second sleeve, and the second slide is slidably connected to the outer wall of the first sleeve. A plurality of first light rods are connected to the top surface of the slide plate. The first light rods can penetrate the top cavity of the sampling tube and the connecting seat. The bottom surface of the slip ring is located on the movement trajectory of the plurality of first light rods. Two second light rods are connected to the top surface of the slip ring. The bottom end of the first slide is located on the movement trajectory of the two second light rods. Two third light rods are connected to the top of the first slide. The bottom end of the second slide is located on the movement trajectory of the two third light rods. A scale plate is connected to the outer wall of the first sleeve. A thin rod is provided at the top of the second slide. Scale lines are provided on the scale plate. The thin rod of the second slide is located in front of the scale lines on the scale plate.

[0012] Preferably, when multiple second sleeves are threaded together, the bottom end of the first slide on the upper second sleeve abuts against the top ends of the two third polished rods on the lower second sleeve.

[0013] Preferably, the hammer is connected to two first handles, and the outer wall of the first sleeve is connected to two second handles.

[0014] The beneficial effects are: 1. The soil sampling device for geological exploration in bridge construction projects, through the cooperation of the first sleeve, the second sleeve, the connecting seat, and the sampling tube, allows workers to adapt to sampling operations at different soil depths by increasing or decreasing the number of the second sleeve. It is also easy to disassemble and assemble, facilitating flexible assembly according to actual needs and improving the applicability of the sampling. Furthermore, it is easy to carry and store after disassembly. The rotating mechanism, when repeatedly impacted, enables intermittent unidirectional rotation of the sampling tube. The teeth on the bottom edge of the sampling tube enhance its ability to cut into the soil layer. As the sampling tube rotates, the teeth can cut through the soil layer, reducing the resistance to the downward movement of the sampling tube and allowing it to penetrate the soil more smoothly, thereby improving the sampling efficiency.

[0015] 2. The soil sampling device for geological exploration in the bridge construction project, through the setting of the sampling component, allows the staff to take out the sampling tube, pull out the two sliding arms, and then use a rubber hammer to strike the two sliding arms, causing the two sliding arms to drive the sliding plate to slide towards the bottom opening of the sampling tube, thereby pushing out the soil sample in the sampling tube. The method of pushing out the sample as a whole can ensure the integrity of the cylindrical soil sample as much as possible, which is convenient for collection and subsequent testing.

[0016] 3. The soil sampling device for geological exploration in this bridge construction project, through the setting of the display component, makes the sliding plate, the first smooth rod, the slip ring, the second smooth rod, the first slide, the third smooth rod, and the second slide form a transmission structure from bottom to top. It can transmit the information of the sliding plate being pushed by the soil sample to the second slide section by section, thereby providing the staff with information that the sample tube is full. This allows the staff to take out the sample tube in time, avoiding the situation where the staff take out the sample tube prematurely or perform multiple ineffective impact operations without knowing whether the sample tube is full of soil sample. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the first sleeve structure of the present invention; Figure 3 This is a schematic diagram of the second sleeve structure of the present invention; Figure 4 This is a schematic diagram of the rotating mechanism structure of the present invention; Figure 5 This is a schematic diagram of the slide bar structure of the present invention; Figure 6 This is a schematic diagram of the sample output component structure of the present invention; Figure 7 This is a schematic diagram of the sliding arm structure of the present invention; Figure 8 This is a schematic diagram of the display component structure of the present invention; Figure 9 This is a schematic diagram of the second carriage structure of the present invention; Figure 10 This is a schematic diagram of the slip ring structure of the present invention.

[0019] The annotations in the attached figures are explained as follows: 1. First sleeve; 11. Striking rod; 12. Counterweight; 2. Second sleeve; 21. Sliding shaft; 3. Connecting seat; 4. Sampling tube; 41. Tooth; 5. Rotating mechanism; 51. Slide rod; 52. Rotary seat; 53. Ball joint; 54. Magnetic block; 55. Arc groove; 6. Sample output components; 61. Slide plate; 62. Slide arm; 7. Display component; 71. First light rod; 72. Slip ring; 73. Second light rod; 74. First carriage; 75. Third light rod; 76. Second carriage; 77. Scale plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] One embodiment of the present invention is as follows: Please see Figure 1 - Figure 7A soil sampling device for geological exploration in bridge construction projects includes a first sleeve 1, a striking rod 11 slidably connected inside the first sleeve 1, a hammer 12 connected to the top of the striking rod 11, a second sleeve 2 threadedly connected to the bottom of the first sleeve 1, a sliding shaft 21 slidably connected to the inner wall of the second sleeve 2, a connecting seat 3 threadedly connected to the bottom of the second sleeve 2, and a sampling tube 4 rotatably connected to the bottom of the connecting seat 3. Two first handles are connected to the hammer 12, and two second handles are connected to the outer wall of the first sleeve 1. The first sleeve 1 provides a stable sliding guide channel for the striking rod 11, ensuring that the striking rod 11 can only move axially up and down along the inner wall of the first sleeve 1, avoiding lateral deviation that affects impact accuracy. The striking rod 11 and the hammer 12 constitute an impact power assembly. The operator can lift the hammer 12 by holding the first handles, and after releasing the hammer 12, the gravitational potential energy of the hammer 12 is converted into kinetic energy, which is transmitted through the striking rod 11 to transmit the impact force. The first sleeve 1 and the second sleeve 2 are connected by threads, which not only facilitates disassembly and assembly, but also ensures the coaxiality of the two after connection, ensuring smooth transmission of impact force. The sliding shaft 21 inside the second sleeve 2 moves down synchronously after being hit by the impact rod 11. A limiting mechanism is provided between the sliding shaft 21 and the second sleeve 2 to limit the sliding range of the sliding shaft 21. When the sliding shaft 21 moves down to the position, it applies a downward inertial impact force to the second sleeve 2. The second sleeve 2 transmits the downward impact force to the connecting seat 3 and the sampling tube 4. The sampling tube 4 has an opening at the bottom. Before sampling, the sampling tube 4 is placed in the soil sampling area. After the sampling tube 4 is subjected to the downward impact force, the bottom edge of the sampling tube 4 drills down, and the soil sample enters the interior of the sampling tube 4. The two second handles make it convenient for the operator to hold the first sleeve 1, and also make it convenient to use the two second handles to pull the first sleeve 1, the second sleeve 2, the connecting seat 3 and the sampling tube 4 out of the soil after sampling.

[0022] Furthermore, the bottom end of the impact rod 11 protrudes from the bottom of the first sleeve 1 and strikes the sliding shaft 21 below it. Multiple second sleeves 2 are provided, and these sleeves 2 can be connected by threads. A spring is provided between the sliding shaft 21 and the inner wall of the second sleeve 2. The sliding shafts 21 inside the multiple threaded second sleeves 2 abut against each other sequentially. When the hammer 12 drives the impact rod 11 to fall, the bottom end of the impact rod 11 extends out of the first sleeve 1 and directly contacts the sliding shaft 21 below, applying the impact force directly to the sliding shaft 21. When soil sampling is required in the borehole, the length of the second sleeve 2 needs to be extended according to the borehole depth. Workers prepare the corresponding number of second sleeves 2 in advance according to the sampling depth, and then connect the multiple second sleeves 2 sequentially by threads. The first sleeve 1 is then connected to the uppermost second sleeve 2, and the connecting seat 3 is connected to the lowermost second sleeve 2. The spring between the sliding shaft 21 and the inner wall of the second sleeve 2 acts as a reset mechanism. When the impact force disappears... After the staff lifts the hammer 12 and the impact rod 11 again, the spring can push the sliding shaft 21 back to its initial position, preparing for the next impact. The spring force is only enough to allow the sliding shaft 21 to reset without external force, and does not affect the transmission of impact force. The sliding shafts 21 in the multiple second sleeves 2 abut against each other in sequence, thereby realizing the segmented transmission of the impact force of the impact rod 11. This ensures that even in the case of a long stroke of multiple second sleeves 2 combined, the impact force of the impact rod 11 can be effectively transmitted to the lowest sliding shaft 21, ensuring the power transmission efficiency during sampling. Through the cooperation of the first sleeve 1, the second sleeve 2, the connecting seat 3 and the sampling tube 4, the staff can adapt to sampling operations at different soil depths by increasing or decreasing the number of second sleeves 2. The disassembly and assembly are relatively convenient, and it is easy to flexibly assemble according to actual needs, which improves the applicability of sampling. At the same time, it is also easy to carry and store after disassembly.

[0023] In addition, the connecting seat 3 is equipped with a rotating mechanism 5, which can drive the sampling tube 4 to rotate by the impact force of the sliding shaft 21. The rotating mechanism 5 includes a sliding rod 51, which is vertically slidably connected to the inner wall of the connecting seat 3. The bottom of the sliding rod 51 is unidirectionally rotatably connected to a rotating seat 52. Multiple ball-head rods 53 are connected to the outer wall of the rotating seat 52. The top of the sampling tube 4 is provided with a cavity, and multiple arc-shaped grooves 55 are opened on the inner wall of the cavity of the sampling tube 4. The ball-head rods 53 are located away from the rotating seat 52. One end of the rod is provided with a ball head, and the ball heads of multiple ball head rods 53 are slidably connected to multiple arc-shaped grooves 55 respectively. A magnetic block 54 is connected to the top of the slide rod 51, and the magnetic block 54 is magnetically connected to the bottom end of the slide shaft 21. A ratchet and pawl mechanism is provided between the slide rod 51 and the rotating seat 52. A limiting structure is provided between the slide rod 51 and the inner wall of the connecting seat 3 to restrict the rotation of the slide rod 51. The multiple arc-shaped grooves 55 are arranged in a circumferential array and are spiral in shape. When the ball head rod 53 moves down, it can utilize the arc-shaped grooves. 55 drives the sampling tube 4 to rotate. A ring of teeth 41 is installed on the bottom edge of the sampling tube 4. The outer wall of the slide rod 51 is provided with a protruding ridge, and the inner wall of the connecting seat 3 is provided with a limiting groove. The protruding ridge of the slide rod 51 is embedded in the limiting groove to form a limiting structure, ensuring that the slide rod 51 can only move up and down along the axial direction and cannot rotate. The slide rod 51 is magnetically connected to the slide shaft 21 through the magnetic block 54, which facilitates quick positioning and docking of the two. This ensures that when the slide shaft 21 moves down, its impact force is transmitted to the slide rod 51, thereby driving the slide rod 51 to move down. When the slide shaft 21 moves up and resets using the spring force, it can drive the slide rod 51 to move up and reset through the magnetic block 54, so that the slide rod 51 can move up and down synchronously with the slide shaft 21. In addition, when disassembling the second sleeve 2, the magnetic block 54 and the slide shaft 21 can be quickly separated, improving the convenience of operation. The ratchet and pawl mechanism between the slide rod 51 and the rotating seat 52 realizes unidirectional rotation transmission. The rotating seat 52 can only rotate counterclockwise and cannot rotate clockwise (e.g., Figure 5 As shown), when the swivel 52 moves the ball joint 53 downward, the ball joint slides within the arc-shaped groove 55. During this process, the ball joint is subjected to a clockwise counter-force from the arc-shaped groove 55 (as shown). Figure 5 As shown), the ratchet and pawl mechanism is engaged. The rotary seat 52 does not rotate when the slide bar 51 moves down, and the multiple ball joints 53 also do not rotate. Therefore, the arc-shaped groove 55 is subjected to a lateral reaction force from the ball joint. When multiple arc-shaped grooves 55 are simultaneously subjected to lateral forces, this lateral force is converted into a rotational torque on the sampling tube 4, driving the sampling tube 4 to rotate counterclockwise at a certain angle at the bottom of the connecting seat 3. The multiple ball joints 53 arranged in a circular array cooperate with the arc-shaped groove 55, making the rotational force on the sampling tube 4 more uniform. The maximum single rotation angle of the sampling tube 4 is fifteen degrees. When the impact force disappears and the slide bar 51 moves up to reset, the ball joints 53 move up synchronously, and the ball joints slide upward along the arc-shaped groove 55. When the ball joints slide upward along the arc-shaped groove 55, they are subjected to a counter-clockwise rotational thrust. At this time, the pawl can slide along the ratchet, allowing the rotary seat 52 to rotate counterclockwise (as shown). Figure 5As shown, when the rotating seat 52 moves upward, multiple ball-head rods 53 rotate along multiple arc-shaped grooves 55, while the sampling tube 4 does not rotate. This allows the sampling tube 4 to rotate intermittently in one direction when it is repeatedly impacted. The teeth 41 on the bottom edge of the sampling tube 4 can enhance its ability to cut into the soil layer. While the sampling tube 4 rotates, the teeth 41 can cut the soil layer, reduce the resistance of the sampling tube 4 going down, and make the sampling tube 4 insert into the soil layer more smoothly, thereby improving the sampling efficiency of the sampling tube 4.

[0024] In addition, the sampling tube 4 is equipped with a sample ejection assembly 6 for ejecting the sample after sampling. The sample ejection assembly 6 includes a slide plate 61, which is vertically slidably connected to the inner wall of the sampling tube 4. Two sliding arms 62 are slidably connected through the inner wall of the slide plate 61. The sampling tube 4 has two longitudinal grooves, through which the two sliding arms 62 pass respectively. The two longitudinal grooves provide sliding guidance for the two sliding arms 62, allowing the two sliding arms 62 and the slide plate 61 to slide downwards within the sampling tube 4. The two sliding arms 62 are mirror images of each other and can be pulled outwards. The end of the sliding arm 62 away from the slide plate 61 has a finger groove. When the sliding arm 62 retracts into the slide plate 61, the end away from the slide plate 61 is flush with the outer wall of the sampling tube 4, preventing the sampling tube 4 from inserting into the soil. If the soil becomes obstructed, the user can pinch the sliding arm 62 with the finger groove to pull the sliding arm 62 out of the slide plate 61. During the sampling process, the sampling tube 4 drills into the soil. As the soil sample gradually fills the inside of the sampling tube 4, the soil sample inside the sampling tube 4 will gradually push the slide plate 61 upward until the slide plate 61 contacts the inner wall of the top of the sampling tube 4. At this time, the sampling is completed. After the staff pulls out the sampling tube 4, they will pull out the two sliding arms 62 and then use a rubber hammer to strike the two sliding arms 62, causing the two sliding arms 62 to drive the slide plate 61 to slide towards the bottom opening of the sampling tube 4, thereby pushing out the soil sample inside the sampling tube 4. The method of pushing out the sample as a whole can ensure the integrity of the cylindrical soil sample as much as possible, which is convenient for collection and subsequent testing.

[0025] Based on the above embodiments, another embodiment of the present invention is as follows: Please see Figure 1 , Figure 8 - Figure 10It also includes a display component 7, which includes a slip ring 72, a first slide 74, and a second slide 76. The slip ring 72 is vertically slidably connected to the inner wall of the connecting seat 3. The first slide 74 is slidably connected to the outer wall of the second sleeve 2. The second slide 76 is slidably connected to the outer wall of the first sleeve 1. The top surface of the slide plate 61 is connected to multiple first light rods 71. The first light rods 71 ​​can penetrate the top cavity of the sampling tube 4 and the connecting seat 3. The bottom surface of the slip ring 72 is located on the movement trajectory of the multiple first light rods 71. The top surface of the slip ring 72 is connected to two second light rods 73. The bottom end of the first slide 74 is located on the movement trajectory of the two second light rods 73. The top of the first sleeve 1 is connected to two third guide rods 75. The bottom of the second slide 76 is located on the movement trajectory of the two third guide rods 75. The outer wall of the first sleeve 1 is connected to a scale plate 77. The top of the second slide 76 is provided with a thin rod. The scale plate 77 is provided with scale lines. The thin rod of the second slide 76 is located in front of the scale lines of the scale plate 77. When the soil sample in the sampling tube 4 is about to be filled, the soil sample pushes the slide plate 61 to move upward. When the soil sample is filled, the slide plate 61 is pushed to the top inner wall of the sampling tube 4. At this time, the slide plate 61 moves to the highest position. During the upward movement of the slide plate 61, the slide plate 61 drives the slip ring 72 to move upward through multiple first guide rods 71. Ring 72 drives the first slide 74 upward via two second polished rods 73. The first slide 74 drives the second slide 76 upward via two third polished rods 75. When the second slide 76 moves upward, the thin rod above it moves upward in front of the scale plate 77, thus pointing to different scale lines. When the thin rod is at the highest scale line, the slide plate 61 moves to its highest position, indicating that the soil sample in the sampling tube 4 has been filled. At this time, the staff can remove the sampling tube 4 without continuing to operate the hammer 12 to impact it, thus avoiding unnecessary work. Slide plate 61, first polished rod 71, slip ring 72, second polished rod 73, first slide 74, third polished rod 75 The second slide 76 forms a transmission structure from bottom to top, which can transmit the information of the slide plate 61 being pushed by the soil sample to the second slide 76 section by section. This provides the staff with information that the sampling tube 4 is full of sample, so that the staff can take out the sampling tube 4 in time. This avoids the situation where the staff take out the sampling tube 4 prematurely or perform multiple ineffective impact operations without knowing whether the sampling tube 4 is full of soil sample. After the sampling tube 4 and the soil sample are taken out, the slide plate 61, the first polished rod 71, the slip ring 72, the second polished rod 73, the first slide 74, the third polished rod 75, and the second slide 76 can fall back to their original positions under their own weight.

[0026] It is worth noting that when multiple second sleeves 2 are threaded together, the bottom end of the first slide 74 on the upper second sleeve 2 abuts against the top ends of the two third light rods 75 on the lower second sleeve 2; the outer wall of the second sleeve 2 is provided with a limiting structure to restrict the sliding range of the first slide 74. When the staff connects multiple second sleeves 2 according to the sampling depth, multiple first slides 74 are arranged vertically side by side, and the power transmission from bottom to top is achieved by the third light rods 75 between adjacent first slides 74, without affecting the normal operation of the display component 7.

[0027] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A soil sampling device for bridge construction engineering geological exploration, characterized in that, Include: First sleeve (1), the first sleeve (1) is connected with the ram (11) inside the sliding connection, the ram (11) top end is connected with the weight (12); The bottom end of the first sleeve (1) is threadedly connected with the second sleeve (2), and the inner wall of the second sleeve (2) is slidably connected with the slide shaft (21); The bottom end of the second sleeve (2) is threadedly connected with the connecting seat (3), and the connecting seat (3) is rotatably connected with the sampling tube (4) at the bottom; The connecting seat (3) is provided with a rotating mechanism (5), which can drive the sampling tube (4) to rotate by the impact force of the slide shaft (21); The sampling tube (4) is provided with a sample outlet assembly (6) for pushing out the sample after sampling.

2. The soil sampling device for bridge construction engineering geological exploration according to claim 1, characterized in that: The bottom end of the ram (11) can protrude from the bottom of the first sleeve (1) and impact the slide shaft (21) below it, the second sleeve (2) is provided with a plurality of, the second sleeve (2) can be connected by thread, the inner wall of the slide shaft (21) and the second sleeve (2) is provided with a spring, the slide shaft (21) in the second sleeve (2) after multiple threaded connection is in turn abutted.

3. The soil sampling device for bridge construction engineering geological exploration according to claim 2, characterized in that: The rotating mechanism (5) includes a slide rod (51), which is vertically slidably connected to the inner wall of the connecting seat (3), the bottom of the slide rod (51) is one-way rotatably connected with a rotating seat (52), the outer wall of the rotating seat (52) is connected with a plurality of ball head rods (53), the top of the sampling tube (4) is provided with a cavity, a plurality of arc grooves (55) are formed in the inner wall of the cavity of the sampling tube (4), the end of the ball head rod (53) away from the rotating seat (52) is provided with a ball head, the ball heads of the plurality of ball head rods (53) are slidably connected with the plurality of arc grooves (55) respectively, the top end of the slide rod (51) is connected with a magnetic block (54), and the magnetic block (54) is magnetically connected with the bottom end of the slide shaft (21).

4. The soil sampling device for bridge construction engineering geological exploration according to claim 3, characterized in that: The slide rod (51) and the rotating seat (52) are provided with a ratchet and pawl mechanism, and the slide rod (51) and the inner wall of the connecting seat (3) are provided with a limiting structure for limiting the rotation of the slide rod (51).

5. The soil sampling device for bridge construction engineering geological exploration according to claim 4, characterized in that: A plurality of arc grooves (55) are arranged in a circumferential array, the arc grooves (55) are helical, the ball head rod (53) can drive the sampling tube (4) to rotate when it moves downward, and the bottom edge of the sampling tube (4) is provided with a ring of teeth (41).

6. The soil sampling device for bridge construction engineering geological exploration according to claim 3, characterized in that: The sample outlet assembly (6) includes a slide plate (61), which is vertically slidably connected to the inner wall of the sampling tube (4), the inner wall of the slide plate (61) is slidably connected with two slide arms (62), two longitudinal grooves are formed in the sampling tube (4), the two slide arms (62) penetrate the two longitudinal grooves respectively, the two slide arms (62) are mirror image arranged, the two slide arms (62) can be pulled out, and the end of the slide arm (62) away from the slide plate (61) is provided with a finger groove.

7. The soil sampling device for bridge construction engineering geological exploration according to claim 6, characterized in that: Also include display components (7), the display components (7) include sliding ring (72), first sliding carriage (74) and second sliding carriage (76), the sliding ring (72) is vertically slidingly connected in the inner wall of connecting seat (3), the first sliding carriage (74) is slidingly connected in the outer wall of second sleeve (2), the second sliding carriage (76) is slidingly connected in the outer wall of first sleeve (1), the top surface of sliding plate (61) is connected with a plurality of first light pole (71), the first light pole (71) can penetrate the top cavity of sampling tube (4) and connecting seat (3), the bottom surface of sliding ring (72) is located on the movement track of a plurality of first light pole (71), the top surface of sliding ring (72) is connected with two second light pole (73), the bottom end of first sliding carriage (74) is located on the movement track of two second light pole (73), the top end of first sliding carriage (74) is connected with two third light pole (75), the bottom end of second sliding carriage (76) is located on the movement track of two third light pole (75), the outer wall of first sleeve (1) is connected with scale plate (77), the top of second sliding carriage (76) is provided with thin rod, the scale plate (77) is provided with scale line, and the thin rod of second sliding carriage (76) is located in the front side of the scale line of scale plate (77).

8. The soil sampling device for bridge construction engineering geological exploration according to claim 7, characterized in that: When a plurality of the second sleeve (2) are threadedly connected with each other, the bottom end of the first sliding carriage (74) on the second sleeve (2) located at the upper side abuts against the top end of the two third light pole (75) on the second sleeve (2) located at the lower side.

9. The soil sampling device for bridge construction engineering geological exploration according to claim 1, characterized in that: The heavy hammer (12) is connected with two first handles, and the outer wall of the first sleeve (1) is connected with two second handles.

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