A physical step pressure type road construction monitoring pavement water permeameter

Abstract

The application relates to a road surface water seepage detection technology, in particular to a physical step pressurization type road surface water seepage detector for highway construction monitoring, which comprises a supporting base, a sealing gasket, a measuring cylinder for containing a detection liquid, a communication pipe for connecting the measuring cylinder with the supporting base, a piston slidingly and sealingly arranged in the measuring cylinder, a pressure-providing piece comprising a lifting column which can slide to extrude the detection liquid, and a sealing piece comprising a sealing ring slidingly and fittingly arranged on the supporting base, wherein the pressure-providing piece can drive the sealing ring to move downwards to extrude the sealing gasket when the pressure-providing piece is in action. The sealing property between the sealing gasket and the road surface can be increased with the increase of the pressure in the measuring cylinder through the cooperation of the pressure-providing piece and the sealing piece, and the sealing gasket is provided with a centripetal extrusion force, so that the side leakage resistance of the device is improved, and the detection result is not inaccurate due to the side leakage of the detection liquid with the increase of the detection pressure when the road surface with a small water seepage coefficient is detected.

Description

Technical Field

[0001] This invention relates to a pavement seepage detection technology, specifically a pavement seepage meter for monitoring highway construction using a physical stepped pressure type. Background Technology

[0002] The permeability coefficient of a road surface is an important indicator for evaluating its drainage performance and density. A higher permeability coefficient indicates that water can easily seep in; a lower permeability coefficient indicates a denser road surface and better waterproofing. This is crucial for road engineering quality control and maintenance decisions. A pavement permeability meter is commonly used for this test.

[0003] A typical pavement permeability meter consists of a base and a measuring cylinder. The base has a sealing gasket; when the meter is placed on it, gravity compresses and deforms the gasket, enhancing the seal between the meter and the pavement and preventing lateral flow of the test fluid during testing, which could lead to inaccurate results. The measuring cylinder contains the test fluid and is equipped with a step-by-step pressurization module. This module simulates the permeability of water flow on the pavement during daily use, ensuring the test results are highly reliable.

[0004] The pressurization effect of the step-by-step pressurization module increases the vertical pressure of the water flow on the road surface, while also enhancing the lateral flow dynamics. Since the sealing of common permeability meters relies primarily on the static deformation of the sealing gasket caused by gravity during initial placement, this static seal proves insufficient against the continuously increasing internal water pressure. Especially when testing dense pavements with extremely low permeability coefficients, the pressure required to obtain effective measurement data is substantial, easily leading to leakage as the test fluid is "squeezed out" from the junction of the sealing gasket and the road surface. This leakage not only directly results in measured values ​​far exceeding the actual vertical permeability, causing severe distortion of the test results, but may even render the test impossible. While increasing the initial deformation of the sealing gasket to improve sealing can effectively solve the problem, maintaining a high degree of deformation for extended periods significantly shortens its lifespan. Summary of the Invention

[0005] The purpose of this invention is to provide a pavement permeability meter for monitoring highway construction using a physical stepped pressure method, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pavement permeability meter for monitoring highway construction using a physical stepped pressurization type includes a support base on which a locking motor is fixedly installed;

[0008] It also includes a sealing gasket, which is fixedly installed at the bottom of the support base;

[0009] A graduated cylinder for holding a test liquid; the graduated cylinder is connected to the support base via a connecting pipe; a piston is slidably and sealed inside the graduated cylinder;

[0010] The pressure supply component includes a lifting column that slides into the measuring cylinder, the lifting column being able to slide inward within the measuring cylinder to cause the piston to squeeze the detection liquid;

[0011] The sealing element includes a sealing ring that slides and engages with the support base. When the pressure-applying element is activated, it can drive the sealing ring to move downward to compress the sealing gasket.

[0012] As described above, the physical stepped pressurization type road surface permeability meter for highway construction monitoring includes: the pressure supply component further includes a rotating shaft fixedly installed on the output end of the locking motor, and a first gear fixedly installed on the rotating shaft; a third gear meshing with the first gear is rotatably installed on the measuring cylinder; multiple sets of interconnected pressure-increasing grooves are provided on the lifting column, and a protruding column that slides and engages with the pressure-increasing grooves is fixedly installed on the third gear.

[0013] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressurization method includes an interconnected inclined trough and a horizontal trough. When the inclined trough engages with the protruding column, the lifting column can slide inward within the measuring cylinder, while when the horizontal trough engages with the protruding column, the position of the lifting column remains unchanged.

[0014] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressurization method includes: a first sleeve fixedly installed on the lifting column; a second sleeve fixedly installed on the piston and slidably fitted with the first sleeve; a baffle slidably fitted inside the first sleeve; a pressure spring provided inside the first sleeve; and the two ends of the pressure spring respectively abutting against the baffle and the piston.

[0015] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressure system has the following features: a locking groove is provided on the first sleeve; a locking wedge block that slidably engages with the locking groove is mounted on the baffle; a locking spring is provided inside the baffle; and the two ends of the locking spring respectively abut against the locking wedge block and the baffle.

[0016] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressure system includes: a fourth gear rotatably mounted on the support base; a second gear meshing with the fourth gear fixedly mounted on the rotating shaft; a third wedge fixedly mounted on the fourth gear; a top plate slidably fitted inside the support base; a fourth wedge cooperating with the third wedge fixedly mounted on the top plate; and multiple sets of sealing springs provided inside the support base; the two ends of the sealing springs respectively abut against the top plate and the sealing ring.

[0017] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressurization method includes: a sealing column horizontally mounted on the support base that slides into the connecting pipe; a guide groove for guiding the connecting pipe is provided on the sealing column; a return spring is installed inside the connecting pipe; and the two ends of the return spring abut against the sealing column and the connecting pipe, respectively.

[0018] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressurization method includes: a turntable rotatably mounted on the connecting pipe; a second wedge and a second bevel gear fixedly mounted at both ends of the turntable; a first bevel gear meshing with the second bevel gear fixedly mounted on the rotating shaft; and a first wedge that cooperates with the second wedge fixedly mounted on the sealing post.

[0019] As described above, the pavement permeability meter for monitoring highway construction using a physical stepped pressure system has an inclined surface and a straight surface on both the first and second wedges.

[0020] The pavement permeability meter for monitoring highway construction using physical stepped pressure as described above: the measuring cylinder is made of tempered glass.

[0021] Compared with the prior art, the beneficial effects of the present invention are: by the cooperation of the pressure-applying component and the sealing component, the sealing performance between the sealing gasket and the road surface can be increased as the pressure in the measuring cylinder increases, and a squeezing force towards the center is provided for the sealing gasket. This can improve the side leakage resistance of the device while ensuring the service life of the sealing gasket, and avoid inaccurate test results due to side leakage of the test liquid as the test pressure increases when testing on roads with a low permeability coefficient. Attached Figure Description

[0022] Figure 1 A schematic diagram of a pavement permeability meter for monitoring road construction using a physical stepped pressure system.

[0023] Figure 2 A schematic diagram of the pavement permeability meter for monitoring physical stepped pressure highway construction from another perspective.

[0024] Figure 3 A schematic diagram of the cross-sectional view of a pavement permeability meter for monitoring physical stepped pressurization type highway construction.

[0025] Figure 4 for Figure 3 A schematic diagram of the structure at point A in the middle.

[0026] Figure 5 for Figure 3 A schematic diagram of the structure at point B.

[0027] Figure 6A schematic diagram of the top plate in a pavement permeability meter for monitoring physical stepped pressure type highway construction.

[0028] Figure 7 for Figure 6 A schematic diagram of the structure at point C.

[0029] Figure 8 A schematic diagram of the connecting pipe in a pavement permeability meter for monitoring physical stepped pressurization in highway construction.

[0030] Figure 9 A schematic diagram of the rising column in a pavement permeability meter for monitoring physical stepped pressurization in highway construction.

[0031] Figure 10 A schematic diagram of the piston structure in a pavement permeability meter for monitoring physical stepped pressure highway construction.

[0032] In the diagram: 1. Support base;

[0033] 2. Sealing gasket;

[0034] 3. Measuring cylinder;

[0035] 4. Connecting pipe;

[0036] 5. Lifting column; 501. Inclined groove; 502. Horizontal groove;

[0037] 6. First sleeve; 601. Locking groove;

[0038] 7. Baffle;

[0039] 8. Locking wedge block;

[0040] 9. Locking spring;

[0041] 10. Compression spring;

[0042] 11. Second sleeve;

[0043] 12. Piston;

[0044] 13. Lock the motor;

[0045] 14. Shaft; 1401. First gear; 1402. First bevel gear; 1403. Second gear;

[0046] 15. Third gear; 1501. Protruding post;

[0047] 16. Sealing post; 1601. Conductor groove; 1602. First wedge;

[0048] 17. Turntable; 1701. Second wedge; 1702. Second bevel gear;

[0049] 18. Return spring;

[0050] 19. Fourth gear; 1901. Third wedge;

[0051] 20. Top plate; 2001. Fourth wedge block;

[0052] 21. Sealing spring;

[0053] 22. Sealing ring. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0056] Please see Figures 1-10 As an embodiment of the present invention, the pavement permeability meter for monitoring highway construction using physical step pressurization includes a support base 1, on which a locking motor 13 is fixedly installed;

[0057] It also includes a sealing gasket 2, which is fixedly installed at the bottom of the support base 1;

[0058] The measuring cylinder 3 is used to hold the test liquid; the measuring cylinder 3 is connected to the support base 1 through the connecting pipe 4; a piston 12 is slidably and sealed inside the measuring cylinder 3.

[0059] The pressure supply component includes a lifting column 5 that slides into the measuring cylinder 3, the lifting column 5 being able to slide inward within the measuring cylinder 3 so that the piston 12 squeezes the detection liquid;

[0060] The sealing element includes a sealing ring 22 that slides and engages with the support 1. When the pressure-applying element is activated, it can drive the sealing ring 22 to move downward to compress the sealing gasket 2.

[0061] In this embodiment, the support base 1 is placed on the road surface to be tested. The support base 1 is relatively heavy. During the placement process, the sealing gasket 2 will first come into contact with the road surface, and then the sealing gasket 2 will be compressed, thereby improving the sealing between the support base 1 and the road surface and reducing the possibility of side leakage of the test liquid.

[0062] During testing, the action of the pressure-applying component and the sealing component is controlled by locking motor 13.

[0063] When the pressure component is activated, it can drive the lifting column 5 to descend intermittently within the measuring cylinder 3, thereby achieving stepped pressurization (during the descent of the lifting column 5, the squeezing force of the piston 12 on the detection fluid will increase, thus giving the detection fluid a greater penetration force); by observing and recording the change in the water head height of the detection fluid within a specific time period under different positions of the lifting column 5, the permeability coefficient of the road surface under different pressures can be derived and calculated, and the detection results are relatively accurate.

[0064] The upper part of the sealing gasket 2 is inclined, and the surface of the sealing ring 22 that mates with it is also inclined. Therefore, when the seal is activated, the sealing ring 22 moves downward and squeezes the sealing gasket 2. Through the mutual cooperation of the inclined surfaces of the two, the sealing performance between the sealing gasket 2 and the road surface is increased, and a squeezing force towards the center is provided for the sealing gasket 2. This improves the device's resistance to side leakage while ensuring the service life of the sealing gasket 2, and avoids inaccurate test results due to side leakage of the test fluid as the test pressure increases when testing on roads with low permeability coefficients.

[0065] As a further embodiment of the present invention, the pressure supply component further includes a rotating shaft 14 fixedly installed on the output end of the locking motor 13, and a first gear 1401 fixedly installed on the rotating shaft 14; a third gear 15 rotatably installed on the measuring cylinder 3, meshing with the first gear 1401; and multiple sets of interconnected pressure boosting grooves are provided on the lifting column 5, and a protruding column 1501 that slides and engages with the pressure boosting grooves is fixedly installed on the third gear 15.

[0066] As a further embodiment of the present invention, the pressure boosting groove assembly includes an inclined groove 501 and a flat groove 502 that are interconnected; wherein when the inclined groove 501 is engaged with the protruding column 1501, the lifting column 5 can slide inward within the measuring cylinder 3, while when the flat groove 502 is engaged with the protruding column 1501, the position of the lifting column 5 remains unchanged.

[0067] In this embodiment, when the locking motor 13 rotates, it can drive the rotating shaft 14 to rotate; and when the locking motor 13 stops rotating, the rotating shaft 14 can maintain its position unchanged (do not rotate).

[0068] The rotating shaft 14 drives the first gear 1401 to rotate, and through meshing, drives the third gear 15 to rotate, thereby causing the protruding column 1501 to slide in the pressure-boosting groove assembly.

[0069] When the protruding column 1501 slides in the inclined groove 501, the squeezing action of the protruding column 1501 on the groove wall of the inclined groove 501 can drive the lifting column 5 to slide inward in the measuring cylinder 3, thereby increasing the squeezing force of the piston 12 on the detection liquid; when the protruding column 1501 slides in the flat groove 502, the lifting column 5 remains in a fixed position; and at this position, by observing and recording the change in the water head height of the detection liquid within a specific time period, the permeability coefficient of the road surface under different pressures can be obtained, and the detection results are relatively accurate.

[0070] As a further embodiment of the present invention, the pressure-applying component further includes a first sleeve 6 fixedly installed on the lifting column 5, and a second sleeve 11 fixedly installed on the piston 12 and slidably fitted with the first sleeve 6; a baffle 7 is slidably fitted inside the first sleeve 6; a pressure-applying spring 10 is provided inside the first sleeve 6; the two ends of the pressure-applying spring 10 respectively abut against the baffle 7 and the piston 12.

[0071] In this embodiment, when the lifting column 5 moves inward in the measuring cylinder 3, it drives the first sleeve 6 to slide inward in the second sleeve 11 (during the movement of the lifting column 5, the connecting pipe 4 is in a blocked state; at this time, the detection fluid can keep the position of the piston 12 relatively stable; when the lifting column 5 does not move, the connecting pipe 4 is open, and at this time the detection fluid can flow vertically to the road surface); and compresses the pressure spring 10. The elastic force of the pressure spring 10 serves as the squeezing force of the piston 12 to squeeze the detection fluid, which can prevent excessive pressure from damaging the sealing performance of the device. Especially when detecting roads with a low permeability coefficient, it can protect the device from damage and thus improve the detection accuracy.

[0072] As a further embodiment of the present invention, a locking groove 601 is provided on the first sleeve 6; a locking wedge 8 that cooperates with the locking groove 601 is slidably installed on the baffle 7; a locking spring 9 is provided inside the baffle 7; and the two ends of the locking spring 9 abut against the locking wedge 8 and the baffle 7 respectively.

[0073] In this embodiment, in the initial position, the locking wedge 8 is located in the locking groove 601. Through the abutting action between the locking groove 601 and the locking wedge 8 (the plane of the locking wedge 8 abuts against the groove wall of the locking groove 601), the displacement of the baffle 7 can be restricted; therefore, when the lifting column 5 moves, the baffle 7 does not move.

[0074] When the lifting column 5 drives the first sleeve 6 to slide inward within the second sleeve 11, the pressure spring 10 is fully compressed. During this process, the second sleeve 11 will contact the locking wedge 8 and squeeze the locking wedge 8 to slide inward along the radial direction of the baffle 7, compressing the locking spring 9. This causes the plane of the locking wedge 8 to disengage from the groove wall of the locking groove 601. At this time, the elastic force of the pressure spring 10 will drive the baffle 7 to move away from the piston 12, thereby reducing the compression of the pressure spring 10 and avoiding excessive pressure that could cause the device to fail to seal.

[0075] As a further embodiment of the present invention, the sealing element further includes a fourth gear 19 rotatably mounted on the support base 1; a second gear 1403 meshing with the fourth gear 19 is fixedly mounted on the rotating shaft 14; a third wedge block 1901 is fixedly mounted on the fourth gear 19; a top plate 20 is slidably fitted inside the support base 1; a fourth wedge block 2001 cooperating with the third wedge block 1901 is fixedly mounted on the top plate 20; and multiple sets of sealing springs 21 are provided inside the support base 1; the two ends of the sealing springs 21 respectively abut against the top plate 20 and the sealing ring 22.

[0076] In this embodiment, when the shaft 14 rotates, the second gear 1403 rotates synchronously and drives the fourth gear 19 to rotate through meshing, thereby driving the third wedge block 1901 to rotate.

[0077] When the third wedge 1901 rotates, its wedge surface will abut against the wedge surface of the fourth wedge 2001. As the rotation angle of the fourth gear 19 increases, the relative sliding distance between the third wedge 1901 and the fourth wedge 2001 increases, thereby causing the top plate 20 to move downward a greater distance.

[0078] As the top plate 20 moves downward, it compresses the sealing spring 21, and the elastic force of the sealing spring 21 provides a squeezing force for the sealing ring 22 to squeeze the sealing gasket 2. As the moving distance of the top plate 20 increases, the compression of the sealing spring 21 gradually increases, thereby making the sealing gasket 2 and the road surface more airtight.

[0079] By cooperating with the inclined surface of the sealing ring 22, the sealing performance between the sealing gasket 2 and the road surface can be increased, and a squeezing force towards the center can be provided to the sealing gasket 2. This can improve the device's resistance to side leakage while ensuring the service life of the sealing gasket 2, and avoid inaccurate test results due to side leakage of the test fluid as the test pressure increases when testing on roads with low permeability coefficients.

[0080] As a further embodiment of the present invention, a blocking post 16 is horizontally arranged on the support base 1 and slidably fitted with the connecting pipe 4. The blocking post 16 is provided with a connecting groove 1601 for guiding the connecting pipe 4. A return spring 18 is provided inside the connecting pipe 4. The two ends of the return spring 18 abut against the blocking post 16 and the connecting pipe 4, respectively.

[0081] In this embodiment, during the downward movement of the lifting column 5, the guide groove 1601 and the connecting pipe 4 are misaligned. At this time, the connecting pipe 4 is in a blocked state, so the detection fluid cannot flow to the road surface during the pressurization process, thereby avoiding the loss of detection fluid during the pressurization process. After the lifting column 5 stops moving, the blocking column 16 will drive the guide groove 1601 to cooperate with the connecting pipe 4 (the reset spring 18 is compressed), at which time the detection fluid can flow smoothly to the road surface.

[0082] As a further embodiment of the present invention, a turntable 17 is rotatably mounted on the connecting pipe 4; a second wedge 1701 and a second bevel gear 1702 are fixedly mounted at both ends of the turntable 17, and a first bevel gear 1402 that meshes with the second bevel gear 1702 is fixedly mounted on the rotating shaft 14; a first wedge 1602 that cooperates with the second wedge 1701 is fixedly mounted on the sealing column 16.

[0083] As a further embodiment of the present invention, both the first wedge 1602 and the second wedge 1701 are provided with an inclined surface and a straight surface.

[0084] In this embodiment, when the rotating shaft 14 rotates, it drives the first bevel gear 1402 to rotate, and through meshing, it drives the second bevel gear 1702 to rotate, thereby driving the second wedge block 1701 to rotate through the turntable 17.

[0085] When the protruding post 1501 slides in the inclined groove 501, the rotating second wedge 1701 does not cooperate with the first wedge 1602. At this time, under the elastic force of the reset spring 18, the guide groove 1601 is misaligned with the connecting pipe 4 (the connecting pipe 4 is in a blocked state).

[0086] When the protruding post 1501 slides in the flat groove 502, the inclined surface of the second wedge 1701 engages with the inclined surface of the first wedge 1602. By pressing the first wedge 1602 with the second wedge 1701, the blocking post 16 can be moved away from the turntable 17, so that the guide groove 1601 engages with the connecting pipe 4 (the detection liquid flows normally), and the reset spring 18 is compressed. At this time, the locking motor 13 stops working and records the change in the head height of the detection liquid.

[0087] When pressurization is required, the locking motor 13 continues to rotate, thereby driving the protruding post 1501 to continue sliding in the flat groove 502. During this process, the contact area between the first wedge 1602 and the second wedge 1701 becomes smaller and smaller; and when the protruding post 1501 enters the inclined groove 501, the two disengage. Under the elastic force of the return spring 18, the sealing post 16 is reset to block the connecting pipe 4.

[0088] As a further embodiment of the present invention, the measuring cylinder 3 is made of tempered glass.

[0089] In this embodiment, the tempered glass measuring cylinder 3 has high strength, which can prevent the measuring cylinder 3 from breaking and causing the test to fail when the pressure increases.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0091] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pavement permeability meter for monitoring highway construction using a physical step pressurization method, comprising a support base (1), on which a locking motor (13) is fixedly installed. Its features are, It also includes a sealing gasket (2), which is fixedly installed at the bottom of the support base (1); A measuring cylinder (3) is used to hold the test liquid; the measuring cylinder (3) is connected to the support base (1) through a connecting pipe (4); a piston (12) is slidably and sealed inside the measuring cylinder (3). The pressure supply component includes a lifting column (5) that slides into the measuring cylinder (3), the lifting column (5) being able to slide inward within the measuring cylinder (3) so that the piston (12) squeezes the detection liquid; The sealing element includes a sealing ring (22) that slides into the support (1). When the pressure element is activated, it can drive the sealing ring (22) to move downward to squeeze the sealing gasket (2). The pressure supply component also includes a rotating shaft (14) fixedly installed on the output end of the locking motor (13), on which a first gear (1401) is fixedly installed; a third gear (15) meshing with the first gear (1401) is rotatably installed on the measuring cylinder (3); multiple sets of interconnected pressure-boosting grooves are provided on the lifting column (5), and a protruding column (1501) that slides and engages with the pressure-boosting grooves is fixedly installed on the third gear (15); the pressure-boosting grooves include interconnected inclined grooves (501) and flat grooves (502); wherein the inclined grooves (501) When cooperating with the protruding post (1501), the lifting post (5) can slide inward in the measuring cylinder (3), while when the flat groove (502) cooperates with the protruding post (1501), the position of the lifting post (5) remains unchanged; the seal also includes a fourth gear (19) rotatably mounted on the support base (1); a second gear (1403) meshing with the fourth gear (19) is fixedly mounted on the rotating shaft (14); a third wedge (1901) is fixedly mounted on the fourth gear (19); the support base (1) slides inward. A top plate (20) is fitted in place; a fourth wedge (2001) that cooperates with the third wedge (1901) is fixedly installed on the top plate (20); multiple sets of sealing springs (21) are provided inside the support base (1); the two ends of the sealing springs (21) respectively abut against the top plate (20) and the sealing ring (22); a sealing post (16) that slides and fits into the connecting pipe (4) is horizontally arranged on the support base (1), and a connecting groove (1601) for guiding the connecting pipe (4) is opened on the sealing post (16); a connecting pipe (4) is provided inside the connecting pipe (4). A return spring (18) is provided; the two ends of the return spring (18) respectively abut against the sealing post (16) and the connecting pipe (4); a turntable (17) is rotatably mounted on the connecting pipe (4); a second wedge (1701) and a second bevel gear (1702) are fixedly mounted on the two ends of the turntable (17), and a first bevel gear (1402) that meshes with the second bevel gear (1702) is fixedly mounted on the rotating shaft (14); a first wedge (1602) that cooperates with the second wedge (1701) is fixedly mounted on the sealing post (16).

2. The pavement permeability meter for monitoring highway construction using a physical stepped pressure method according to claim 1, characterized in that, The pressure-applying component also includes a first sleeve (6) fixedly installed on the lifting column (5), and a second sleeve (11) fixedly installed on the piston (12) and slidably fitted with the first sleeve (6); a baffle (7) is slidably fitted inside the first sleeve (6); a pressure spring (10) is provided inside the first sleeve (6); the two ends of the pressure spring (10) respectively abut against the baffle (7) and the piston (12).

3. The pavement permeability meter for monitoring highway construction using a physical stepped pressure method according to claim 2, characterized in that, The first sleeve (6) is provided with a locking groove (601); a locking wedge (8) that cooperates with the locking groove (601) is slidably installed on the baffle (7); a locking spring (9) is provided inside the baffle (7); the two ends of the locking spring (9) abut against the locking wedge (8) and the baffle (7) respectively.

4. The pavement permeability meter for monitoring highway construction using a physical stepped pressure method according to claim 1, characterized in that, Both the first wedge (1602) and the second wedge (1701) are provided with an inclined surface and a straight surface.

5. A pavement permeability meter for monitoring highway construction using a physical stepped pressure method as described in claim 1, characterized in that, The measuring cylinder (3) is made of tempered glass.

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