Device for testing shear stress of bridge deck pavement layer

Abstract

The utility model discloses a device for testing shear stress of a bridge deck pavement layer. The bridge deck pavement shear stress testing device comprises a base, frame plates arranged on the two sides of the upper end of the base, a downward pressing assembly arranged on the lower sides of the centers of the frame plates, a shearing assembly arranged on the lower side of the downward pressing assembly and displacement assemblies arranged on the two sides of the lower end of the base. A motor is controlled to operate to drive a first bevel gear connected with the motor to rotate, second bevel gears on the two sides are driven to rotate in a meshed mode, a hydraulic jack is controlled to extend downwards, and a jacking block moves downwards; under the limiting effects that balance plates on the two sides are embedded into open grooves, side plates are embedded into side grooves, and a rear plate is sleeved with the outer surface of a rear rod arranged in a rear groove, the jacking block moves downwards; the top block moves downwards more stably, so that the shear plate is driven to move downwards more stably, a shear test is performed on a bridge deck slab and a pavement layer on the lower side, and the test stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically a testing device for the shear stress resistance of bridge deck pavement. Background Technology

[0002] With the rapid development of my country's economy, the highway bridge construction industry has made significant progress, and bridge construction has reached world-leading levels. As a crucial component of the bridge structure, the bridge deck pavement layer, under the influence of various external factors, suffers from pavement defects caused by insufficient overall shear resistance. These defects manifest as permanent deformation due to shoving, delamination, and cracking. Therefore, the overall shear resistance of the bridge deck pavement structure is a vital mechanical indicator that requires accurate measurement.

[0003] Existing testing devices have several problems in use: 1. The existing bridge deck pavement shear stress testing device consists of a hydraulic system and its own frame, making it heavy. During testing, it needs to be moved to the desired location using transport equipment and individually positioned and secured, as the device itself cannot move independently, causing inconvenience. 2. Traditional testing devices are mostly designed for shear characteristics under flat conditions, making it difficult to simulate the combined bending and shear effects of bridge deck bending deformation caused by loads or temperature, leading to discrepancies between test results and actual conditions. 3. Furthermore, the existing testing device's downward pressure structure only applies shear force through hydraulic pressure; however, the hydraulic system experiences lateral swaying during extension and retraction, causing instability in the shear force application. Utility Model Content

[0004] The purpose of this invention is to provide a test device for the shear stress of bridge deck pavement to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a base, a frame plate disposed on both sides of the upper end of the base, a pressing component disposed on the lower side of the center of the frame plate, a shearing component disposed on the lower side of the pressing component, and a displacement component disposed on both sides of the lower end of the base;

[0006] The pressing assembly includes a hydraulic jack located on the lower side of the center of the frame plate. A top block is fitted at the lower end of the hydraulic jack. Balance plates are provided on both sides of the top block. The inner walls on both sides of the frame plate are provided with slots that cooperate with the balance plates.

[0007] The shearing assembly includes a slot on the underside of the top block, a plate is detachably inserted into the slot, and inner grooves are provided on the front and rear sides of the plate, with inserts movably disposed inside the inner grooves.

[0008] The displacement component includes slots formed inside the front and rear ends of both sides of the base. A first bevel gear is provided on the transverse inner wall of the slot. A motor is connected between the first bevel gears on the front and rear sides. A second bevel gear is provided on the lower inner wall of the slot, which cooperates with the first bevel gear.

[0009] As a further improvement of this utility model: a side groove is provided on the center side wall of the slot, and a side plate that cooperates with the side groove is provided on the outer center wall of the balance plate.

[0010] As a further embodiment of this utility model: a rear groove is provided on the rear side of the slotted section, a rear rod is provided inside the rear groove, and a rear plate is provided on the rear side of the balance plate to cooperate with the rear groove, and the rear plate is fitted onto the outer wall of the rear rod.

[0011] As a further embodiment of this utility model: the inner groove is provided with first side grooves on the upper and lower sides, the insert plate is provided with first side plates on the upper and lower sides that cooperate with the first side grooves, the first side plate is provided with a first telescopic rod on the side near the center of the insert plate, and the outer wall of the first telescopic rod is fitted with a first spring.

[0012] As a further improvement of this utility model: the slot has grooves on the front and rear sides that cooperate with the insert plate, and a push plate is movably arranged inside the grooves.

[0013] As a further embodiment of this utility model: the upper and lower sides of the groove are provided with second side grooves, the upper and lower sides of the push plate are provided with second side plates that cooperate with the second side grooves, the side of the second side plate near the insert plate is provided with a second telescopic rod, and the outer wall of the second telescopic rod is fitted with a second spring.

[0014] As a further improvement of this utility model, a shearing plate is provided on the lower outer surface of the insert plate.

[0015] As a further embodiment of this utility model: a bottom groove is provided on the lower outer side of the hollow groove, a screw is provided inside the bottom groove, a base plate is fitted on the outer wall of the screw, and a moving wheel is provided on the lower surface of the base plate.

[0016] As a further improvement of this utility model: a limiting groove is provided on the side wall of the bottom groove, and a limiting plate is provided on the side wall of the bottom plate to cooperate with the limiting groove.

[0017] As a further improvement of this utility model: a bridge panel is inserted into the upper center of the base, and a paving layer is provided on the upper end of the bridge panel.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. When the shear stress of bridge deck pavement needs to be tested, this utility model controls the motor to rotate the first bevel gear connected to it, which in turn rotates the second bevel gears on both sides, which in turn rotate the screw connected to them. The screw rotates and the base plate slides in the bottom groove. With the limiting plate embedded in the limiting groove, the moving wheel moves vertically downward from the bottom groove and extends out. The moving wheel contacts the ground and supports the base, directly pushing the base to move the testing device to the required position. The motor is then controlled to reverse, causing the base plate to slide into the bottom groove, thereby causing the moving wheel to move upward and retract into the bottom groove, so that the lower surface of the base contacts the ground. This achieves direct positioning of the device and improves the ease of use of the testing device.

[0020] 2. Before testing, this utility model addresses the need to replace the shearing assembly when the bridge deck is bent due to load or temperature. The push plate is moved forward and backward, sliding towards the inner groove. This causes the second side plates on both sides to slide within the second side groove, compressing the second telescopic rod and the second spring, causing them to contract. Simultaneously, the insert plate is pushed out of the groove. The shearing plate is then pulled downwards to disengage the insert plate from the slot, thus completing the shearing plate disassembly. Based on the required degree of bending of the bridge deck pavement, a shearing plate with the appropriate bending degree can be selected. The upper insert plate is inserted into the slot, and the inclined surface of the insert plate slides towards the inner groove under the pressure of the slot, causing the first side plate to slide within the first side groove. This compresses the first telescopic rod and the first spring, causing them to contract. When the insert plate aligns with the groove, the first telescopic rod and the first spring push the first side plate outwards, causing the insert plate to insert into the aligned groove. This quickly completes the replacement of the shearing assembly, allowing for the simulation of actual bending deformation of the bridge deck for corresponding shearing tests.

[0021] 3. During the shear test, this utility model controls the hydraulic jack to extend downwards, causing the jack to move downwards. With the balance plates on both sides embedded in the slots, the side plates embedded in the side slots, and the rear plate fitted inside the rear slot and the outer surface of the rear rod, the downward movement of the jack is more stable, thereby driving the shear plate to move downwards more stably. This allows for shear testing of the lower bridge deck and pavement layer, improving the stability of the test. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0023] Figure 2 This is a bottom-view overall schematic diagram of an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the shearing component according to an embodiment of the present utility model;

[0025] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged view of part A in the diagram;

[0026] Figure 5 This is a schematic diagram of the displacement component according to an embodiment of the present invention.

[0027] In the diagram: 1. Base; 2. Frame plate; 301. Hydraulic jack; 302. Top block; 303. Balance plate; 304. Slot; 305. Side slot; 306. Side plate; 307. Rear side; 308. Rear rod; 309. Rear plate; 401. Slot; 402. Insert plate; 403. Inner slot; 404. Panel; 405. First side slot; 406. First side plate; 407. First telescopic rod; 408. First spring; 409. 410. Insert groove; 411. Push plate; 412. Second side groove; 413. Second side plate; 414. Second telescopic rod; 415. Second spring; 416. Shear plate; 501. Empty groove; 502. First bevel gear; 503. Motor; 504. Second bevel gear; 505. Bottom groove; 506. Screw; 507. Bottom plate; 508. Limiting groove; 509. Limiting plate; 510. Moving wheel; 6. Bridge deck; 7. Pavement layer. Detailed Implementation

[0028] To facilitate the solution of the problem, this utility model provides a bridge deck pavement layer shear stress testing device. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example 1

[0030] like Figures 1 to 5 As shown, this embodiment provides a shear stress testing device for bridge deck pavement layer 7, including a base 1, a frame plate 2 disposed on both sides of the upper end of the base 1, a pressing component disposed on the lower side of the center of the frame plate 2, a shear component disposed on the lower side of the pressing component, and a displacement component disposed on both sides of the lower end of the base 1.

[0031] The pressing assembly includes a hydraulic top 301 disposed on the lower side of the center of the frame plate 2. A top block 302 is disposed at the lower end of the hydraulic top 301. Balance plates 303 are disposed on both sides of the top block 302. The inner walls of both sides of the frame plate 2 are provided with slots 304 that cooperate with the balance plates 303.

[0032] The shearing assembly includes a slot 401 located on the underside of the top block 302. A plate 402 is detachably inserted into the slot 401. An inner groove 403 is provided on the front and rear sides 307 of the plate 402. A panel 404 is movably disposed inside the inner groove 403.

[0033] The displacement component includes slots 501 formed inside the front and rear ends of both sides of the base 1. A first bevel gear 502 is provided on the transverse inner wall of the slot 501. A motor 503 is connected between the first bevel gears 502 on the front and rear sides. A second bevel gear 504 is provided on the lower inner wall of the slot 501 to cooperate with the first bevel gear 502.

[0034] Example 2

[0035] As a further embodiment of this utility model, the central side wall of the slot 304 is provided with a side groove 305, and the central outer wall of the balance plate 303 is provided with a side plate 306 that cooperates with the side groove 305. The hydraulic jack 301 extends downward, causing the top block 302 to move downward. With the balance plates 303 on both sides embedded in the slot 304, the side plate 306 embedded in the side groove 305, and the rear plate 309 fitted inside the rear groove and the outer surface of the rear rod 308, the downward movement of the top block 302 is more stable.

[0036] Furthermore, a rear groove is formed on the rear side 307 of the slot 304, and a rear rod 308 is provided inside the rear groove. A rear plate 309 is provided on the rear side 307 of the balance plate 303, which cooperates with the rear groove. The rear plate 309 is fitted onto the outer wall of the rear rod 308. The hydraulic jack 301 extends downward, causing the top block 302 to move downward. With the balance plates 303 on both sides embedded in the slot 304, the side plates 306 embedded in the side grooves 305, and the rear plate 309 fitted onto the outer surface of the rear rod 308 inside the rear groove, the downward movement of the top block 302 is more stable.

[0037] Furthermore, the inner groove 403 has first side grooves 405 on its upper and lower sides, and the insert plate 404 has first side plates 406 on its upper and lower sides that cooperate with the first side grooves 405. The first side plate 406 has a first telescopic rod 407 on the side near the center of the insert plate 402. The outer wall of the first telescopic rod 407 is fitted with a first spring 408. The first telescopic rod 407 and the first spring 408 push the first side plate 406 outward, causing the insert plate 404 to be inserted into the aligned groove 409, so that the replacement of the shearing component can be completed quickly.

[0038] Furthermore, the slot 401 has grooves 409 on its front and rear sides 307 that cooperate with the insert plate 404. A push plate 410 is movably disposed inside the groove 409. Pushing the push plate 410 causes it to slide in the groove 409 toward the inner groove 403, which causes the second side plates 412 on the upper and lower sides to slide in the second side groove 411. This compresses the second telescopic rod 413 and the second spring 414, causing them to retract. At the same time, the insert plate 404 is pushed out of the groove 409 and disengaged. Pulling down the shearing plate 415 causes the insert plate 402 to disengage from the slot 401, thus completing the disassembly of the shearing plate 415.

[0039] Furthermore, the groove 409 has second side grooves 411 on its upper and lower sides, and the push plate 410 has second side plates 412 on its upper and lower sides that cooperate with the second side grooves 411. The side of the second side plate 412 near the insert plate 402 has a second telescopic rod 413. The outer wall of the second telescopic rod 413 is fitted with a second spring 414. The second telescopic rod 413 and the second spring 414 are squeezed together to retract, and at the same time, the insert plate 404 is pushed out of the groove 409 and disengaged. The shear plate 415 is pulled down to disengage the insert plate 402 from the slot 401, thus completing the disassembly of the shear plate 415. Therefore, the shear plate 415 with the corresponding degree of curvature can be selected and replaced according to the curvature of the bridge deck pavement.

[0040] As a further embodiment of this utility model, a shearing plate 415 is provided on the lower outer surface of the insert plate 402. The insert plate 402 can be disassembled from the slot 401 to complete the disassembly of the shearing plate 415.

[0041] Furthermore, a bottom groove 505 is provided on the lower outer side of the empty groove 501. A screw 506 is provided inside the bottom groove 505. A base plate 507 is fitted on the outer wall of the screw 506. A movable wheel 510 is provided on the lower surface of the base plate 507. When the screw 506 rotates, it engages and drives the base plate 507 to slide in the bottom groove 505.

[0042] Furthermore, a limiting groove 508 is provided on the side wall of the bottom groove 505, and a limiting plate 509 is provided on the side wall of the base plate 507 to cooperate with the limiting groove 508. Under the limiting of the limiting plate 509 embedded in the limiting groove 508, the moving wheel 510 moves vertically downward from the bottom groove 505 and extends out, so that the moving wheel 510 contacts the ground and supports the base 1, directly pushing the base 1 to move the testing device to the position to be used.

[0043] Furthermore, a bridge panel 6 is inserted into the upper center of the base 1, and a pavement layer 7 is provided on the upper end of the bridge panel 6. The top block 302 moves downward more stably, thereby driving the shearing plate 415 to move downward more stably, and performing a shearing test on the lower bridge panel 6 and pavement layer 7.

[0044] Working principle: When shear stress testing of bridge deck pavement is required, the control motor 503 drives the first bevel gear 502 connected to it to rotate, which in turn drives the second bevel gears 504 on both sides to rotate, which in turn drives the screw 506 connected to them to rotate, which in turn drives the base plate 507 to slide in the bottom groove 505. Under the limitation of the limiting plate 509 embedded in the limiting groove 508, the moving wheel 510 moves vertically downward from the bottom groove 505 and extends out, so that the moving wheel 510 contacts the ground and supports the base 1, directly pushing the base 1 to move the testing device to the required position. The control motor 503 then reverses its operation, causing the base plate 507 to move towards the bottom groove 505. 05 Slides internally, causing the moving wheel 510 to move upward and retract into the bottom groove 505, so that the lower surface of the base 1 contacts the ground, thus achieving direct positioning of the device and improving the ease of use of the testing device. Before testing, if the bridge deck is bent and deformed due to load or temperature, the model of the shearing component needs to be changed. Push the push plate 410 from the front and back so that it slides in the groove 409 towards the inner groove 403, causing the second side plates 412 on the upper and lower sides to slide in the second side groove 411, squeezing the second telescopic rod 413 and the second spring 414 to retract, while pushing the insert plate 404 out of the groove 409. To remove the shear plate 415, pull it downwards to disengage the insert plate 402 from the slot 401. This allows for the selection and replacement of the shear plate 415 with the appropriate curvature based on the required curvature of the bridge deck pavement. Insert the upper insert plate 402 into the slot 401. The inclined surface of the insert plate 404 is pressed against the slot 401 and slides into the inner groove 403, causing the first side plate 406 to slide within the first side groove 405. This compresses the first telescopic rod 407 and the first spring 408, causing them to contract. When the insert plate 404 aligns with the groove 409, the first telescopic rod 407 and the first spring 408 push the first side plate 406 outwards. The shearing assembly can be quickly replaced by inserting the panel 404 into the aligned groove 409 to simulate the actual bending deformation of the bridge deck for corresponding shearing tests. During the shearing test, the hydraulic jack 301 is controlled to extend downward, causing the jack 302 to move downward. With the balance plates 303 on both sides embedded in the slot 304, the side plates 306 embedded in the side grooves 305, and the rear plate 309 fitted inside the rear groove and the outer surface of the rear rod 308, the downward movement of the jack 302 is more stable, thereby driving the shearing plate 415 to move downward more stably. Shearing tests are then performed on the lower bridge deck 6 and pavement layer 7, improving the stability of the test.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] 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 shear stress testing device for bridge deck pavement layer (7), characterized in that: It includes a base (1), a frame plate (2) set on both sides of the upper end of the base (1), a pressing component set on the lower side of the center of the frame plate (2), a shearing component set on the lower side of the pressing component, and a displacement component set on both sides of the lower end of the base (1). The pressing assembly includes a hydraulic top (301) located on the lower side of the center of the frame plate (2), a top block (302) is provided at the lower end of the hydraulic top (301), a balance plate (303) is provided on both sides of the top block (302), and slots (304) that cooperate with the balance plate (303) are provided on the inner walls of both sides of the frame plate (2). The shearing assembly includes a slot (401) opened on the lower side of the top block (302), a plate (402) is detachably inserted into the slot (401), and an inner groove (403) is opened on the front and rear sides (307) of the plate (402), and a panel (404) is movably arranged inside the inner groove (403). The displacement component includes a slot (501) opened inside the front and rear ends on both sides of the base (1). A first bevel gear (502) is provided on the transverse inner wall of the slot (501). A motor (503) is connected between the first bevel gears (502) on the front and rear sides. A second bevel gear (504) is provided on the lower inner wall of the slot (501) and cooperates with the first bevel gear (502).

2. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: The slot (304) has a side slot (305) on its central side wall, and the balance plate (303) has a side plate (306) on its central outer wall that cooperates with the side slot (305).

3. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: A rear groove is provided on the rear side (307) of the slot (304), and a rear rod (308) is provided inside the rear groove. A rear plate (309) is provided on the rear side (307) of the balance plate (303) to cooperate with the rear groove, and the rear plate (309) is fitted on the outer wall of the rear rod (308).

4. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: The inner groove (403) has a first side groove (405) on its upper and lower sides. The insert (404) has a first side plate (406) on its upper and lower sides that cooperates with the first side groove (405). A first telescopic rod (407) is provided on the side of the first side plate (406) near the center of the insert plate (402). A first spring (408) is fitted on the outer wall of the first telescopic rod (407).

5. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: The slot (401) has grooves (409) on the front and rear sides (307) that cooperate with the insert (404), and a push plate (410) is movably disposed inside the groove (409).

6. The shear stress testing device for bridge deck pavement layer (7) according to claim 5, characterized in that: The groove (409) has a second side groove (411) on its upper and lower sides. The push plate (410) has a second side plate (412) on its upper and lower sides that cooperates with the second side groove (411). A second telescopic rod (413) is provided on the side of the second side plate (412) near the insert plate (402). A second spring (414) is fitted on the outer wall of the second telescopic rod (413).

7. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: A shearing plate (415) is provided on the lower outer surface of the insert plate (402).

8. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: A bottom groove (505) is provided on the lower outer side of the empty groove (501). A screw (506) is provided inside the bottom groove (505). A base plate (507) is fitted on the outer wall of the screw (506). A moving wheel (510) is provided on the lower surface of the base plate (507).

9. The shear stress testing device for bridge deck pavement layer (7) according to claim 8, characterized in that: The bottom groove (505) has a limiting groove (508) on its side wall, and the bottom plate (507) has a limiting plate (509) that cooperates with the limiting groove (508) on its side wall.

10. The shear stress testing device for bridge deck pavement layer (7) according to claim 1, characterized in that: A bridge panel (6) is inserted into the upper center of the base (1), and a paving layer (7) is provided on the upper end of the bridge panel (6).

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