Engineering pavement compressive strength measuring device

Abstract

The invention discloses an engineering pavement compressive strength measuring device, and relates to the technical field of pavement detection, the engineering pavement compressive strength measuring device comprises a bearing assembly, an extrusion assembly and a blanking assembly, the extrusion assembly is located on the upper side of the bearing assembly, the bearing assembly comprises a base, a moving seat is installed on the base, a compression-resistant seat is installed in the moving seat, and an embedded groove is formed in the upper side of the compression-resistant seat; a supporting strip is fixedly arranged in the embedded groove, and sandy soil is filled in the embedded groove to simulate the lowermost layer of a real road surface. By means of the technical scheme, the environment of the lower side of a real road surface is simulated in the embedded groove, force borne by the road surface is also extrusion and bending force, and when the base and the sandy soil are arranged to apply pressure to the upper end of the to-be-detected road surface, the force borne by the to-be-detected road surface is close to the real condition.

Description

Technical Field

[0001] The invention relates to the technical field of road surface detection, and in particular to a device for measuring the compressive strength of an engineering road surface. Background Art

[0002] The compression test of engineering pavement is an important part of evaluating the strength and durability of pavement structure, aiming to ensure that the pavement can withstand the expected traffic load and environmental factors within the design service life. The test usually adopts a standardized method, such as using a pressure testing machine to apply gradually increasing pressure to the pavement sample until the sample is damaged, and recording the maximum pressure value at the time of damage, that is, the compressive strength. This process requires strict control of the test conditions, including sample preparation, maintenance, temperature and humidity of the test environment, etc., to ensure the accuracy and repeatability of the test results. The test results are not only used to verify whether the pavement design meets the requirements of the specifications, but also provide a scientific basis for the maintenance and repair of the pavement. Through regular compression tests, potential problems of the pavement structure can be discovered in time, and corresponding reinforcement measures can be taken to extend the service life of the pavement and ensure driving safety. In addition, compression test data can also be used to optimize the pavement material ratio and construction process, and improve the quality and economic benefits of the project. In short, the compression test of engineering pavement is a key step to ensure the quality, safety and durability of road projects, and is of great significance to improving the overall performance of transportation infrastructure.

[0003] However, in the prior art, only a simple extrusion test is performed on the samples. In reality, the lower layer of the road surface is often compacted map or sand, and the pressure on the road surface is converted into bending force, so it is necessary to simulate the actual force. Summary of the invention

[0004] In view of the above technical problems, the present invention discloses a device for measuring the compressive strength of an engineering road surface, including a bearing assembly, an extrusion assembly, and a feeding assembly. The extrusion assembly is located on the upper side of the bearing assembly. The bearing assembly includes a base, a movable seat is installed on the base, and a compression seat is installed in the movable seat. An embedded groove is arranged on the upper side of the compression seat, a support bar is fixed in the embedded groove, and sand is installed in the embedded groove to simulate the bottom layer of the real road surface. Through the above technical scheme, the environment on the lower side of the real road surface is simulated in the embedded groove, and the force on the road surface is also the force of extrusion and bending. The base and sand can be set so that when pressure is applied to the upper end of the road surface to be tested, the force on the road surface to be tested is close to the real situation.

[0005] Furthermore, a straight slide is fixedly installed on the base, a slider is slidably installed in the straight slide, a rotating shaft is rotatably installed on the slider, the rotating shaft is fixedly connected to the movable seat, a torsion spring is fixedly installed between the slider and the rotating shaft, and a long spring is fixedly installed in the straight slide and connected to the slider.

[0006] Furthermore, a large notch is set in the middle of the base, the moving seat is located at the edge of the notch for testing, and the moving seat slides onto the notch and the anti-compression seat falls. Through the above technical solution, the bottom of the moving seat contacts the base during the test and is located at the edge of the opening, which is more stable when squeezed. After the test is completed, it can be moved to the notch to put down the anti-compression seat and test the road surface, and it can also be restored to its original state through the torsion spring and the long spring, which greatly improves the degree of automation.

[0007] Furthermore, the extrusion assembly includes a sliding shaft, a motor seat is fixedly mounted on the top of the sliding shaft, a test motor is fixedly mounted on the motor seat, a test disc is fixedly mounted on the rotating shaft of the test motor, a connecting rod is connected to the test disc by a ball joint, a lifting plate is slidably mounted on the sliding shaft, a connecting block is slidably mounted on the lifting plate, the connecting block is ball-jointed with the connecting rod, the connecting rod is eccentrically connected to the test disc, and the connecting rod is eccentrically connected to the lifting plate.

[0008] Furthermore, the upper rotation of the lifting plate is equipped with a lead screw, which cooperates with the connecting block to drive the connecting block to move. Through the above technical solution, the test disc rotates to drive the connecting rod, and the connecting rod drives the lifting plate to move up and down. During the rapid downward movement, the road surface to be tested is squeezed, so that the force it receives is similar to the repeated impact of the real road surface, and the position of the connecting block is adjustable, and the height of the squeezing impact can be adjusted.

[0009] Furthermore, the unloading assembly includes a side plate, a slide rail is installed on the side plate, a unloading motor is fixedly installed on the hand wheel, a first connecting rod is fixedly installed on the rotating shaft of the unloading motor, a second connecting rod is hinged on the first connecting rod, a second sliding shaft is hinged on the second connecting rod, an intermediate plate is fixedly installed on the second sliding shaft, a first sliding shaft and a second sliding shaft are fixedly installed at both ends of the intermediate plate, a material picking rod is fixedly installed on the second sliding shaft, the material picking rod supports the anti-pressure seat and drives the anti-pressure seat to move to the notch of the base.

[0010] Furthermore, the slide rail includes an upper slide and a lower slide, a first arc slide and a second arc slide are arranged between the upper slide and the lower slide, and the first slide shaft switches and slides between the upper slide and the lower slide.

[0011] Furthermore, a first blocking plate is hinged at the connection between the upper slide and the first arc-shaped slide, and the first blocking plate rotates upward and is limited by the side plate when rotating downward.

[0012] Furthermore, the upper side of the lower slide is hinged to the right second blocking plate, and the lower side of the second blocking plate contacts the lower side of the lower slide. The second blocking plate rotates toward the side close to the bearing assembly and is limited by the bottom of the lower slide in the opposite direction. A socket is set at the bottom of the anti-pressure seat, and the socket cooperates with the material picking rod. Through the above technical scheme, the material picking rod moves horizontally in the slide rail and is inserted into the socket of the anti-pressure seat, and then drives the moving seat to move to the notch of the base. The anti-pressure seat rotates, driving the moving seat to rotate, the anti-pressure seat and the road surface to be tested move downward following the material picking rod, and then the material picking rod moves horizontally and is retracted. Finally, the material picking rod rotates and resets, and the moving seat contacts the bottom of the side plate and is pulled out and falls.

[0013] The beneficial effects of the present invention compared with the prior art are: (1) Through the technical solution of the present invention, the environment on the lower side of the real road surface is simulated in the embedded groove, and the force applied to the road surface is also the force of compression and bending. When the base and sand are provided, when pressure is applied to the upper end of the road surface to be inspected, the force applied to the road surface to be inspected is close to the real situation.

[0014] (2) Through the technical solution of the present invention, the bottom of the movable seat is in contact with the base during the detection and is located at the edge of the opening, which is more stable when squeezed. After the detection is completed, it can move to the gap to put down the anti-compression seat and the detection road surface. At the same time, it can also return to its original state through the torsion spring and the long spring, which greatly improves the degree of automation.

[0015] (3) Through the technical solution of the present invention, the test disc rotates to drive the connecting rod, and the connecting rod drives the lifting plate to move up and down. During the rapid downward movement, the road surface to be tested is squeezed so that the force it is subjected to is similar to the repeated impact of the real road surface. In addition, the position of the connecting block is adjustable, and the height of the extrusion impact can be adjusted.

[0016] (4) Through the technical solution of the present invention, the material picking rod moves horizontally in the slide rail and is inserted into the jack of the pressure-resistant seat. Then, the movable seat is driven to move to the notch of the base. The pressure-resistant seat rotates, driving the movable seat to rotate. The pressure-resistant seat and the road surface to be tested move downward following the material picking rod. Then, the material picking rod moves horizontally and is retracted. Finally, the material picking rod rotates and resets. The movable seat contacts the bottom of the side plate and is pulled out and falls. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the local structure of an embodiment of the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 Schematic diagram of the blanking assembly of the embodiment of the present invention Figure 1 .

[0021] Figure 5 Schematic diagram of an extrusion assembly according to an embodiment of the present invention.

[0022] Figure 6 Schematic diagram of the blanking assembly of the embodiment of the present invention Figure 2 .

[0023] Figure 7 Schematic diagram of the blanking assembly of the embodiment of the present invention Figure 3 .

[0024] Figure 8 Schematic diagram of the blanking assembly of the embodiment of the present invention Figure 4 .

[0025] Fig. 9 Schematic diagram of the blanking assembly of the embodiment of the present invention Figure 5 .

[0026] Figure numbers: 1-bearing component; 2-extrusion component; 3-feeding component; 101-base; 102-straight slide; 103-slider; 104-torsion spring; 105-rotating shaft; 106-long spring; 107-moving seat; 108-pressure-resistant seat; 109-embedded groove; 110-support bar; 111-housing; 201-sliding shaft; 202-lifting plate; 203-connecting block; 204-motor seat; 205-test motor; 206-test disc; 20 7-connecting rod; 208-lead screw; 209-hand wheel; 301-unloading motor; 302-first connecting rod; 303-second connecting rod; 304-first sliding shaft; 305-middle plate; 306-vertical plate; 307-second sliding shaft; 308-feeding rod; 309-side plate; 310-upper slide; 311-first baffle plate; 312-first curved slide; 313-lower slide; 314-second curved slide; 315-opening; 316-second baffle plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-Figure 9As shown, a device for measuring the compressive strength of an engineering pavement comprises a bearing assembly 1, an extrusion assembly 2, and a feeding assembly 3. The extrusion assembly 2 is located on the upper side of the bearing assembly 1, and the feeding assembly 3 is located on one side of the bearing assembly 1. In this embodiment, the bearing assembly 1 comprises a base 101, a movable seat 107 is mounted on the base 101, a compression seat 108 is mounted in the movable seat 107, an embedded groove 109 is arranged on the upper side of the compression seat 108, a support bar 110 is fixedly mounted in the embedded groove 109, and sand is loaded in the embedded groove 109 to simulate the bottom layer of a real pavement. Two support bars 110 are arranged, and the pavement to be tested is usually made into small pieces and placed on the support bars 110. The pavement to be tested is squeezed and deformed by the downward squeezing of the extrusion assembly 2. Through the above technical solution, the environment on the lower side of the real pavement is simulated in the embedded groove 109, and the force on the pavement is also the force of squeezing and bending. The base 101 and the sand can be arranged so that when pressure is applied to the upper end of the pavement to be tested, the pavement to be tested is subjected to a force close to the real situation.

[0029] In this embodiment, a straight slide 102 is fixedly installed on the base 101, a slider 103 is slidably installed in the straight slide 102, a rotating shaft 105 is rotatably installed on the slider 103, the rotating shaft 105 is fixedly connected to the moving seat 107, and a torsion spring 104 is fixedly installed between the slider 103 and the rotating shaft 105. A long spring 106 is fixedly installed in the straight slide 102 and connected to the slider 103. A large gap is set in the middle of the base 101, and the moving seat 107 is located at the edge of the gap for testing. The moving seat 107 slides to the gap and the pressure-resistant seat 108 falls. After the detection is completed, the anti-pressure seat 108 is pushed by the unloading component 3, and the moving seat 107 follows the movement. The slider 103 slides in the straight slide 102 and then is located on the notch. At this time, the moving seat 107 will rotate, and the anti-pressure seat 108 and the road surface to be tested will fall down. The moving seat 107 can be restored to its original position through the rebound of the torsion spring 104 and the rotating shaft 105. Through the above technical solution, the bottom of the moving seat 107 is in contact with the base 101 during the detection and is located at the edge of the opening. It is more stable when squeezed. After the detection is completed, it can be moved to the notch to put down the anti-pressure seat 108 and the detected road surface. At the same time, it can also be restored to its original state through the torsion spring 104 and the long spring 106, which greatly improves the degree of automation.

[0030] In this embodiment, the extrusion assembly 2 includes a sliding shaft 201, a motor seat 204 is fixedly mounted on the top of the sliding shaft 201, a test motor 205 is fixedly mounted on the motor seat 204, a test disc 206 is fixedly mounted on the rotating shaft of the test motor 205, a connecting rod 207 is connected to the test disc 206 by a ball joint, a lifting plate 202 is slidably mounted on the sliding shaft 201, a connecting block 203 is slidably mounted on the lifting plate 202, the connecting block 203 and the connecting rod 207 are ball-jointed, the connecting rod 207 is eccentrically connected to the test disc 206, and the connecting rod 207 is eccentrically connected to the lifting plate 202. Since the connecting rod 207 is eccentrically connected to the test disc 206, the top of the connecting rod 207 moves around the axis of the test disc 206. Since the bottom of the connecting rod 207 is connected to the connecting block 203, the connecting block 203 and the test disc 206 are not coaxial, so the lifting plate 202 will be pulled upward and then downward during the movement, thus performing a reciprocating motion.

[0031] In this embodiment, the upper rotation of the lifting plate 202 is equipped with a lead screw 208, and the lead screw 208 cooperates with the connecting block 203 to drive the connecting block 203 to move. By changing the position of the connecting block 203, the test disc 206 can pull the lifting plate 202 to different heights when rotating, and the position where the lifting plate 202 can squeeze can also be changed, which can be selected according to different road surfaces. Through the above technical solution, the test disc 206 rotates to drive the connecting rod 207, and the connecting rod 207 drives the lifting plate 202 to move up and down, and squeezes the road surface to be tested during the rapid downward movement, so that the force it receives is similar to the repeated impacts received by the real road surface, and the position of the connecting block 203 is adjustable, and the height of the squeezing impact can be adjusted.

[0032] In this embodiment, the unloading component 3 includes a side plate 309, a slide rail is installed on the side plate 309, a unloading motor 301 is fixedly installed on the handwheel 209, a first connecting rod 302 is fixedly installed on the rotating shaft of the unloading motor 301, a second connecting rod 303 is hinged on the first connecting rod 302, a second sliding shaft 307 is hinged on the second connecting rod 303, an intermediate plate 305 is fixedly installed on the second sliding shaft 307, a first sliding shaft 304 and a second sliding shaft 307 are fixedly installed at both ends of the intermediate plate 305, a material picking rod 308 is fixedly installed on the second sliding shaft 307, the material picking rod 308 supports the anti-pressure seat 108 and drives the anti-pressure seat 108 to move to the notch of the base 101. The slide rail includes an upper slide 310 and a lower slide 313, a first arcuate slide 312 and a second arcuate slide 314 are arranged between the upper slide 310 and the lower slide 313, and the first slide shaft 304 switches and slides between the upper slide 310 and the lower slide 313. A first blocking plate 311 is hinged at the connection between the upper slide 310 and the first arcuate slide 312, and the first blocking plate 311 rotates upward and is limited by the side plate 309 when rotating downward. The upper side of the lower slide 313 is hinged to the right second blocking plate 316, and the lower side of the second blocking plate 316 contacts the lower side of the lower slide 313. The second blocking plate 316 rotates toward the side close to the bearing assembly 1, and is limited by the bottom of the lower slide 313 in the opposite direction. A socket is set at the bottom of the anti-pressure seat 108, and the socket cooperates with the material picking rod 308. Through the above technical scheme, the material picking rod 308 moves horizontally in the slide rail and is inserted into the socket of the anti-pressure seat 108, and then drives the moving seat 107 to move to the notch of the base 101. The anti-pressure seat 108 rotates, driving the moving seat 107 to rotate, and the anti-pressure seat 108 and the road surface to be tested move downward following the material picking rod 308, and then the material picking rod 308 moves horizontally and is retracted, and finally the material picking rod 308 rotates and resets, and the moving seat 107 contacts the bottom of the side plate 309 and is pulled out and falls.

[0033] Working principle: fine sand or other fillers simulating the real road surface are placed in the embedded groove 109, the road surface to be tested is cut into blocks and placed on the support bar 110, close to the lower side of the filler, and then the hand wheel 209 is manually rotated, the hand wheel 209 drives the lead screw 208 to rotate, and the lead screw 208 drives the connecting block 203 to move. Since the connecting block 203 is pulled by the connecting rod 207, the lifting plate 202 is lifted as a whole. If the lower end of the connecting rod 207 gradually approaches the upper end of the connecting rod 207, the lifting plate 202 will drop, and the lower end of the connecting rod 207 is away from the upper end of the connecting rod 207, the lifting plate 202 will rise, so as to adapt to different thicknesses of the road surface to be tested. The road surface is measured, and then the test motor 205 is started. The test motor 205 drives the test disc 206 to rotate, and the test disc 206 drives the connecting rod 207, and the connecting rod 207 drives the connecting block 203, and the connecting block 203 drives the lifting plate 202 to reciprocate and lift, which is similar to the crank slider structure. The bottom end of the lifting plate 202 continuously hammers the upper end of the road surface to be tested, and the lower end of the road surface to be tested is squeezed by the support bar 110 and the filler and gradually deforms. A pressure sensor is set on the lifting plate 202 to record the pressure. It can be hammered quickly and repeatedly, or a certain force can be applied to maintain it. Finally, the road surface to be tested is deformed or damaged, and the pressure and time are recorded.

[0034] Then, the unloading assembly 3 is started, the unloading motor 301 drives the first connecting rod 302, the first connecting rod 302 drives the second connecting rod 303, the second connecting rod 303 drives the vertical plate 306, the vertical plate 306 drives the middle plate 305 to move, the middle plate 305 drives the first sliding shaft 304 and the second sliding shaft 307, the second sliding shaft 307 drives the material picking rod 308 to move, and the specific movement trajectory is as follows: the initial position is as follows Figure 5 , Figure 6The first slide shaft 304 and the second slide shaft 307 are both in the lower slideway 313 and move to a position close to the bearing assembly 1. At this time, the material picking rod 308 also moves to the insertion hole of the anti-pressure seat 108, and then continues to move, pushing the anti-pressure seat 108 and the moving seat 107 to move. The slider 103 moves in the straight slideway 102 to pull the long spring 106 until it moves to the moving seat 107 above the notch of the base 101. When the first slide shaft 304 is against the When the lower slideway 313 ends, it starts to rotate, the first sliding shaft 304 enters the first arc-shaped slideway 312, pushes the first blocking plate 311 upward and enters the upper slideway 310, at this time, the material picking rod 308 also rotates around the second sliding shaft 307, and drives the anti-pressure seat 108 and the moving seat 107, the moving seat 107 rotates around the rotating shaft 105, and then the anti-pressure seat 108 separates from the moving seat 107, the anti-pressure seat 108 is stuck on the material picking rod 308, and the moving seat 107 is rotated around the rotating shaft 105. The movable seat 107 is reset under the action of the torsion spring 104 and the long spring 106. The road surface to be tested on the anti-pressure seat 108 is clamped on the anti-pressure seat 108 by a clamp. This is a prior art and has not been disclosed. The anti-pressure seat 108 moves to the lower side of the bearing assembly 1 following the material picking rod 308, and then the first sliding shaft 304 and the second sliding shaft 307 move in the opposite direction. At this time, the first blocking plate 311 restricts the first sliding shaft 304 from falling, so it is horizontally away from the bearing assembly 1 at the same time, and then Afterwards, the second sliding shaft 307 presses against the second blocking plate 316, and the second blocking plate 316 is restricted by the ground of the lower slide 313 and cannot move, and begins to rotate, and the first sliding shaft 304 enters the second arc-shaped slide 314. At this time, the material picking rod 308 returns to its original position and drives the anti-pressure seat 108. The anti-pressure seat 108 contacts the bottom of the side plate 309 and is pushed out. A box for receiving the material picking rod 308 and the road surface to be tested is placed on the lower side, and then the first sliding shaft 304 returns to the lower slide 313.

[0035] At this time, the next road surface to be tested is fixed in the embedded groove 109 of the anti-pressure seat 108, and then placed on the mobile seat 107, and the load-bearing component 1 and the mobile extrusion component 2 are tested. The load-bearing component 1 and the mobile extrusion component 2 are located in the outer shell 111. After that, the unloading component 3 is started again, and the first sliding shaft 304 will push the second blocking plate 316 to rotate into the opening 315, and then the anti-pressure seat 108 is inserted.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the compressive strength of an engineering pavement, characterized in that: The invention comprises a bearing assembly (1), an extrusion assembly (2), and a material discharge assembly (3), wherein the extrusion assembly (2) is located on the upper side of the bearing assembly (1), and the bearing assembly (1) comprises a base (101), a movable seat (107) is mounted on the base (101), a pressure-resistant seat (108) is mounted in the movable seat (107), an embedded groove (109) is arranged on the upper side of the pressure-resistant seat (108), a support bar (110) is fixedly mounted in the embedded groove (109), and sand is filled in the embedded groove (109) to simulate the bottom layer of a real road surface.

2. The device for measuring the compressive strength of an engineering pavement according to claim 1, characterized in that: A straight slideway (102) is fixedly mounted on the base (101), a slider (103) is slidably mounted in the straight slideway (102), a rotating shaft (105) is rotatably mounted on the slider (103), the rotating shaft (105) is fixedly connected to the movable seat (107), a torsion spring (104) is fixedly mounted between the slider (103) and the rotating shaft (105), and a long spring (106) is fixedly mounted in the straight slideway (102) and is connected to the slider (103).

3. The device for measuring the compressive strength of an engineering pavement according to claim 2, characterized in that: A large notch is provided in the middle of the base (101), and the movable seat (107) is located at the edge of the notch for testing. The movable seat (107) slides onto the notch and the pressure-resistant seat (108) falls down.

4. The device for measuring the compressive strength of an engineering pavement according to claim 3, characterized in that: The extrusion assembly (2) comprises a sliding shaft (201), a motor seat (204) is fixedly mounted on the top of the sliding shaft (201), a test motor (205) is fixedly mounted on the motor seat (204), a test disc (206) is fixedly mounted on the rotating shaft of the test motor (205), a ball joint is connected to a connecting rod (207) on the test disc (206), a lifting plate (202) is slidably mounted on the sliding shaft (201), a connecting block (203) is slidably mounted on the lifting plate (202), a ball joint is formed between the connecting block (203) and the connecting rod (207), the connecting rod (207) and the test disc (206) are eccentrically connected, and the connecting rod (207) and the lifting plate (202) are eccentrically connected.

5. The device for measuring the compressive strength of an engineering pavement according to claim 4, characterized in that: The upper rotation of the lifting plate (202) is provided with a lead screw (208), and the lead screw (208) cooperates with the connecting block (203) to drive the connecting block (203) to move.

6. The device for measuring the compressive strength of an engineering pavement according to claim 5, characterized in that: The material unloading assembly (3) comprises a side plate (309), a slide rail is mounted on the side plate (309), a material unloading motor (301) is fixedly mounted on the hand wheel (209), a first connecting rod (302) is fixedly mounted on the rotating shaft of the material unloading motor (301), a second connecting rod (303) is hingedly mounted on the first connecting rod (302), a second sliding shaft (307) is hingedly mounted on the second connecting rod (303), an intermediate plate (305) is fixedly mounted on the second sliding shaft (307), a first sliding shaft (304) and a second sliding shaft (307) are fixedly mounted at both ends of the intermediate plate (305), a material picking rod (308) is fixedly mounted on the second sliding shaft (307), and the material picking rod (308) supports the anti-pressure seat (108) and drives the anti-pressure seat (108) to move to the notch of the base (101).

7. The device for measuring the compressive strength of an engineering pavement according to claim 6, characterized in that: The slide rail comprises an upper slide (310) and a lower slide (313); a first arc-shaped slide (312) and a second arc-shaped slide (314) are arranged between the upper slide (310) and the lower slide (313); and a first slide shaft (304) switches and slides between the upper slide (310) and the lower slide (313).

8. The device for measuring the compressive strength of an engineering pavement according to claim 7, characterized in that: A first blocking plate (311) is hingedly connected at the connection between the upper slideway (310) and the first arc-shaped slideway (312); the first blocking plate (311) rotates upwards and is limited by the side plate (309) when rotating downwards.

9. The device for measuring the compressive strength of an engineering pavement according to claim 8, characterized in that: The upper side of the lower slideway (313) is hinged to the right second blocking plate (316), and the lower side of the second blocking plate (316) contacts the lower side of the lower slideway (313). The second blocking plate (316) rotates toward the side close to the bearing assembly (1) and is limited by the bottom of the lower slideway (313) in the opposite direction. A socket is provided at the bottom of the anti-pressure seat (108), and the socket cooperates with the material picking rod (308).

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