Negative moment region bridge deck joint structure with axle load testing function

Abstract

The present application relates to the technical field of negative moment area bridge deck, and discloses a negative moment area bridge deck joint structure with axial tension test function, which comprises two prefabricated bridge decks and a joint between the two prefabricated bridge decks, and a plurality of negative tendons are evenly arranged in the two prefabricated bridge decks. The joint structure further comprises a lower joint plate, an upper joint plate, a bracing part, a water drainage part and an anti-skid part. The lower joint plate and the upper joint plate are arranged above the joint, the bracing part is arranged above the negative tendons and penetrates the lower joint plate and the upper joint plate, the plurality of negative tendons are interconnected through the bracing part and a pushing part, and the water drainage part is arranged through the prefabricated bridge deck and the bracing part to guide and discharge rainwater and delay corrosion of the negative tendons. The negative tendons form a whole stress system through the bracing part, the stress resistance of the joint is improved, the water drainage part effectively discharges rainwater, and corrosion of the negative tendons is delayed.

Description

Technical Field

[0001] This invention relates to the field of bridge deck technology in the negative bending moment zone, and specifically to a bridge deck joint structure with axial tensile testing function in the negative bending moment zone. Background Technology

[0002] Bridges are an important component of modern transportation infrastructure. Their structural safety and durability directly affect traffic safety and service life. Precast bridge decks are manufactured in factories and require axial tension testing before use. The use of precast bridge decks can improve construction efficiency and shorten the construction period. In the negative bending moment zone near the bridge supports or mid-span, the bridge deck joints are often under tensile stress for a long time. The negative bending moment causes the top surface of the bridge deck at the joint to be under tension and the bottom surface to be under compression, making the stress in the joint area more complex. The bridge deck joint structure in the negative bending moment zone is usually only connected by prestressed steel bars or negative reinforcement bars passing through the joint, and is combined with simple joint plates or grouting materials to form the driving surface. However, there are still problems that need to be solved.

[0003] For example, the negative bending moment stress at the joint is relatively large, and the stress is borne by each negative reinforcement individually. This is also prone to problems such as water seepage, which leads to corrosion of the internal negative reinforcement and seriously affects the overall load-bearing capacity and durability of the bridge deck. Summary of the Invention

[0004] This invention provides a bridge deck joint structure with axial tensile testing function in the negative bending moment zone, which enables it to form an integral stress system in the negative bending moment zone. At the same time, it has excellent hydrophobicity and corrosion resistance, which are technical problems that urgently need to be solved.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a bridge deck joint structure with axial tensile testing function in the negative bending moment zone includes two precast bridge decks and a joint located between the two precast bridge decks. Multiple negative reinforcement bars are uniformly and continuously arranged inside the two precast bridge decks to bear the negative bending moment tensile force. The structure also includes:

[0007] One of the precast bridge panels is connected to a lower seam plate by a fixing component, and the other precast bridge panel is provided with an upper seam plate by a fixing component, which cooperates with the lower seam plate. The lower seam plate and the upper seam plate cover the seam. The upper seam plate has a T-hole through it, and the lower seam plate has a through hole through it.

[0008] A connecting support is provided above the negative reinforcement and extends through the lower seam plate and the upper seam plate. It includes a connecting pressure member that connects multiple negative reinforcements and a pushing member that extends through the connecting pressure member to interconnect multiple negative reinforcements and provide support for the lower seam plate and the upper seam plate.

[0009] The hydrophobic part is arranged through the prefabricated bridge deck and the bracing part to guide and discharge rainwater and delay the corrosion of the negative reinforcement, which comprises water permeable parts arranged through the prefabricated bridge deck and water guide parts arranged through the bracing part, and the water guide parts are located between the negative reinforcements;

[0010] The anti-skid part is arranged through the lower and upper joint plates and located in the bracing part to cooperate with the hydrophobic part, which comprises convex grinding parts arranged symmetrically through the upper and lower joint plates and induction parts arranged in the bracing part to provide anti-skid performance on the lower and upper joint plates in rainy days.

[0011] Further, the bracing part comprises:

[0012] The bracing cylinder is arranged in the joint and above the negative reinforcement;

[0013] The rotating disc has a plurality of rotating discs arranged uniformly and symmetrically in the bracing cylinder and connected rotatably with the bracing cylinder;

[0014] The foot-shaped block is connected eccentrically with the rotating disc;

[0015] The push rod has a plurality of push rods arranged sealingly through the upper end of the bracing cylinder and respectively extending into the T-shaped hole through the perforation;

[0016] The bracing connecting part is arranged sealingly through the bracing cylinder.

[0017] Further, the bracing connecting part comprises:

[0018] The rubber sleeve is arranged symmetrically through the bottom surface of the bracing cylinder and below the foot-shaped block;

[0019] The pressing rod is arranged through the rubber sleeve and connected frictionally with the rubber sleeve;

[0020] The first spring is fixed at the lower end of the pressing rod;

[0021] The U-shaped plate is arranged symmetrically on the outer side of each negative reinforcement;

[0022] The connecting plate has a plurality of connecting plates respectively connected between the two U-shaped plates arranged on the outer side of each negative reinforcement;

[0023] The connecting plate is connected between the plurality of connecting plates and connected with the lower end of the first spring.

[0024] Further, the pushing part comprises:

[0025] The rocker is rotatably and eccentrically connected at one end to the end surface of the rotating disc;

[0026] The guide sleeve is arranged symmetrically through the upper part of the bracing cylinder and corresponds to the position of the rotating disc;

[0027] The piston is rotatably connected at the other end of the rocker and located inside the guide sleeve;

[0028] A second spring is arranged on the piston;

[0029] An end disc is fixed on the upper end of the second spring and below the lower joint plate.

[0030] Further, the water permeable member comprises:

[0031] A water permeable layer is integrally formed on the upper end of the prefabricated bridge deck and has an inclined angle towards the joint;

[0032] A water guide groove is formed through the prefabricated bridge deck and located beside the water permeable layer;

[0033] A plurality of drainage holes are uniformly formed on the end of the prefabricated bridge deck close to the joint and communicate with the water guide groove.

[0034] Further, the water guide member comprises:

[0035] A plurality of telescopic pipes are uniformly arranged in the joint, one end of each pipe is connected to the prefabricated bridge deck through a fixing member and communicates with the drainage hole, and the other end of each pipe is connected to the support cylinder through a fixing member and the support cylinder communicates with the telescopic pipe;

[0036] A plurality of elbow pipes are uniformly and symmetrically arranged through the bottom surface of the support cylinder and located between the plurality of negative reinforcement;

[0037] A plurality of recesses are symmetrically arranged above the support cylinder, a plurality of water holes are uniformly formed in each recess and penetrate through the top surface of the support cylinder.

[0038] Further, the convex grinding member comprises:

[0039] A plurality of grooves are arrayed above the upper joint plate and the lower joint plate;

[0040] A plurality of through grooves are uniformly formed on the upper joint plate and the lower joint plate and communicate with the grooves;

[0041] A plurality of rubber blocks are movably arranged in each groove;

[0042] A connecting strip is arranged in the through groove to connect the plurality of rubber blocks.

[0043] Further, the sensing member comprises:

[0044] A through opening is formed on the bottom surface of the lower joint plate and the upper joint plate and communicates with the groove;

[0045] An electric rod is fixed on the bottom surface of the lower joint plate and the upper joint plate through a fixing member;

[0046] A push plate is fixed on the telescopic end of the electric rod and penetrates through the through opening to connect with the rubber block;

[0047] A rain sensor is fixed on the inner bottom wall of the support cylinder, is piezoelectric type and is electrically connected with the electric rod.

[0048] Further, the prefabricated bridge deck panel outer side is detachably provided with a shaft pull test piece, the shaft pull test piece comprises:

[0049] Threaded groove, opening in the negative reinforcement far away from the prefabricated bridge deck panel one end outer side;

[0050] Counterforce crossbeam, having two, respectively set in two said prefabricated bridge deck panel far away from each other one end, and cover set in the outer side of negative reinforcement;

[0051] Roller, rolling inlay in the bottom surface of counterforce crossbeam;

[0052] Nut, with threaded groove screw connection, and through steel backing plate extrusion fixed counterforce crossbeam.

[0053] Further, the shaft pull test piece further comprises:

[0054] Steel pad, symmetrically arranged on both sides of one of the prefabricated bridge deck panel, and one end is in contact with one of the counterforce crossbeam;

[0055] Pressure sensor, arranged at the other end of the steel pad;

[0056] Jack, symmetrically arranged on both sides of another prefabricated bridge deck panel, and one end is connected with another counterforce crossbeam, and the other end is in contact with the pressure sensor through the steel sleeve.

[0057] The above scheme of the present application at least includes the following beneficial effects:

[0058] By setting the connecting support part, the plurality of negative reinforcements can form a whole stress system, which significantly improves the ability of the joint to resist tension and the load capacity above the joint, prevents the transition deformation of the lower joint plate and the upper joint plate, and at the same time, the drainage part can effectively bypass the negative reinforcement to guide and discharge rainwater, delay the corrosion of the negative reinforcement, and prolong the service life of the prefabricated bridge deck panel. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 The whole perspective view of the negative moment area bridge deck panel joint structure provided by the embodiment of the present application is shown;

[0060] Figure 2 The perspective view of the prefabricated bridge deck panel and negative reinforcement combination provided by the embodiment of the present application is shown;

[0061] Figure 3 The whole sectional plane view of the negative moment area bridge deck panel joint structure provided by the embodiment of the present application is shown;

[0062] Figure 4 The structure schematic view of A in the embodiment of the present application is shown; Figure 3

[0063] Figure 5 ​The structure schematic diagram provided by the embodiment of the present application at B in FIG. 3;

[0064] Figure 6 The cross-sectional plane structure schematic diagram of the turntable, the foot-shaped block and the piston after the push rod is pressed down, which is provided by the embodiment of the present application;

[0065] Figure 7 The perspective view of the supporting cylinder, which is provided by the embodiment of the present application;

[0066] Figure 8 The perspective view of the combination of the turntable and the U-shaped plate, which is provided by the embodiment of the present application;

[0067] Figure 9 The perspective view of the combination of the turntable, the rotating rod and the piston, which is provided by the embodiment of the present application;

[0068] Figure 10 The perspective exploded view of the rubber block and the push-up plate, which is provided by the embodiment of the present application;

[0069] Figure 11 The perspective view of the combination of the prefabricated bridge deck and the shaft tension test piece, which is provided by the embodiment of the present application;

[0070] Figure 12 The perspective view of the counter-force beam, which is provided by the embodiment of the present application.

[0071] Explanation of reference signs:

[0072] In the figure: 1, prefabricated bridge deck; 2, joint; 3, negative reinforcement; 4, L-shaped groove; 5, lower joint plate; 6, upper joint plate; 7, T-shaped hole; 8, perforation; 9, supporting cylinder; 10, rotating rod; 11, turntable; 12, foot-shaped block; 13, rubber sleeve; 14, pressing rod; 15, first spring; 16, U-shaped plate; 17, connecting plate; 18, connecting plate; 19, sleeve; 20, rubber ring; 21, push rod; 22, bolt; 23, rocker; 24, piston; 25, second spring; 26, end disc; 27, guide sleeve; 28, water permeable layer; 29, water guide groove; 30, row hole; 31, telescopic pipe; 32, rain sensor; 33, elbow; 34, groove; 35, through groove; 36, rubber block; 37, connecting strip; 38, through opening; 39, push-up plate; 40, electric rod; 41, water hole; 42, threaded groove; 43, counter-force beam; 44, round hole; 45, roller; 46, steel backing plate; 47, nut; 48, steel backing block; 49, pressure sensor; 50, steel sleeve; 51, jack. DETAILED DESCRIPTION

[0073] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0074] like Figures 1 to 12 As shown, an embodiment of the present invention provides a bridge deck joint structure with axial tensile testing function in the negative bending moment zone, including two precast bridge decks 1 and a joint 2 located between the two precast bridge decks 1. Multiple negative reinforcement bars 3 are uniformly and continuously arranged inside the two precast bridge decks 1 to bear the negative bending moment tensile force. The structure also includes:

[0075] One of the precast bridge deck panels 1 is connected to a lower seam plate 5 by a fixing component, and the other precast bridge deck panel 1 is provided with an upper seam plate 6 by a fixing component, which cooperates with the lower seam plate 5. The lower seam plate 5 and the upper seam plate 6 cover the joint 2. A T-hole 7 is opened through the interior of the upper seam plate 6, and a through hole 8 is opened through the interior of the lower seam plate 5.

[0076] The connecting support is located above the negative reinforcement 3 and extends through the lower seam plate 5 and the upper seam plate 6. It includes a connecting pressure member that connects multiple negative reinforcements 3 and a pushing member that extends through the connecting pressure member to interconnect multiple negative reinforcements 3 and provide support for the lower seam plate 5 and the upper seam plate 6.

[0077] The drainage section is provided through the precast bridge deck 1 and the connecting support section to guide and discharge rainwater and delay the corrosion of the negative reinforcement 3. It includes a water-permeable part provided through the precast bridge deck 1 and a water-guiding part provided through the connecting support section, and the water-guiding part is located between multiple negative reinforcement 3.

[0078] The anti-slip part is provided through the lower seam plate 5 and the upper seam plate 6 and is located in the connecting support part to cooperate with the water-draining part. It includes convex abrasive members symmetrically arranged through the upper seam plate 6 and the lower seam plate 5, and a sensing element provided in the connecting support part, so as to provide anti-slip on the lower seam plate 5 and the upper seam plate 6 in rainy weather.

[0079] Specifically, the precast bridge deck 1 has an L-groove 4, which is located on the outside of the lower joint plate 5. The two precast bridge decks 1 form a joint 2. The joint 2 can provide space for the negative reinforcement 3 and provide space for the precast bridge deck 1 to deform due to thermal expansion and contraction. It can cooperate with the negative reinforcement 3, the lower joint plate 5 and the upper joint plate 6 to bear the tensile force, release the tensile stress and transfer the load, and ensure the smoothness of driving. At the same time, it is suitable for construction and subsequent maintenance work and is suitable for the characteristics of the negative bending moment zone to ensure the safety and stability of the precast bridge deck 1.

[0080] In the actual application process of the embodiment, the staff can lay and connect the prefabricated bridge deck 1 by using the negative reinforcement 3 away from one end of the joint 2. The prefabricated bridge deck 1 can be formed into a bridge deck in the construction area by welding the negative reinforcement 3 as needed. The staff needs to fix the lower joint plate 5 into the L-shaped groove 4 on one of the prefabricated bridge decks 1 by using the fixing part, and then place the upper joint plate 6 into the L-shaped groove 4 on the other prefabricated bridge deck 1 and make the upper joint plate 6 support and fit on the lower joint plate 5. Then, the upper joint plate 6 is fixed and connected with the prefabricated bridge deck 1 by using the fixing part, so that vehicles can drive on the prefabricated bridge deck 1, the upper joint plate 6 and the lower joint plate 5.

[0081] As a preferred embodiment of the present application, the continuous pressing part comprises:

[0082] The supporting cylinder 9 is arranged in the joint 2 and above the negative reinforcement 3.

[0083] The rotating disc 11 is arranged in the supporting cylinder 9 and connected with the supporting cylinder 9.

[0084] The foot-shaped block 12 is connected with the rotating disc 11.

[0085] The push rod 21 is arranged in the supporting cylinder 9 and extends into the T-shaped hole 7 through the perforation 8.

[0086] The supporting and connecting part is arranged in the supporting cylinder 9.

[0087] Specifically, the sleeve 19 is arranged in the upper end of the supporting cylinder 9, the rubber ring 20 is fixed to the inner side of the sleeve 19 and connected with the push rod 21, the rotating rod 10 is arranged in the supporting cylinder 9 and connected with the rotating disc 11, the supporting cylinder 9 can provide rotating support for the rotating rod 10, the rotating rod 10 can provide support for the rotating disc 11, the rotating disc 11 can drive the rotating rod 10 to rotate in the supporting cylinder 9 under the action of an external force, and the rotating disc 11 can provide support for the foot-shaped block 12 and the push rod 21, and the foot-shaped block 12 can drive the rotating disc 11 to rotate and drive the push rod 21 to rotate under the action of an external force.

[0088] The supporting and connecting part comprises:

[0089] The rubber sleeve 13 is arranged in the supporting cylinder 9 and below the foot-shaped block 12.

[0090] The pressing rod 14 is arranged in the rubber sleeve 13 and connected with the rubber sleeve 13.

[0091] The first spring 15 is arranged in the lower end of the pressing rod 14.

[0092] The U-shaped plate 16 is arranged in the supporting cylinder 9 and below the foot-shaped block 12.

[0093] Multiple connecting plates 17 are respectively connected between two U-plates 16 arranged on the outside of each negative reinforcement 3;

[0094] The connecting plate 18 is connected between multiple connecting plates 17 and is connected to the lower end of the first spring 15.

[0095] Specifically, the support cylinder 9 provides stable support for the rubber sleeve 13, the rubber sleeve 13 provides a through channel for the pressure rod 14 and provides support for the pressure rod 14 using friction, the negative rib 3 provides support for the U plate 16, the connecting plate 17 and the connecting plate 18 cooperate to connect multiple U plates 16 to each other, the U plate 16 can provide support for the first spring 15 under the support of the negative rib 3, the first spring 15 can provide support for the pressure rod 14 using rebound force, and can push the connecting plate 18 downward using rebound force after being squeezed, so that the connecting plate 18 can squeeze and position the U plate 16 on the negative rib 3 under the action of external force through the connecting plate 17, so that multiple negative ribs 3 can be connected to each other through the U plate 16, the connecting plate 17 and the connecting plate 18 to form an overall force-bearing system and improve the load-bearing capacity.

[0096] The jacking component includes:

[0097] The joystick 23 rotates at one end and is eccentrically connected to the end face of the turntable 11;

[0098] The guide sleeve 27 is symmetrically installed above the support cylinder 9 and corresponds to the position of the turntable 11;

[0099] Piston 24 is rotatably connected to the other end of rocker arm 23 and is located inside guide sleeve 27;

[0100] The second spring 25 is mounted on the piston 24;

[0101] The end plate 26 is fixed to the upper end of the second spring 25 and is located below the lower seam plate 5.

[0102] Specifically, the turntable 11 provides rotational support for the rocker arm 23 and can use rotational power to drive the rocker arm 23 to rotate around the turntable 10. One end of the rocker arm 23 can rotate on its own under the eccentric support of the turntable 11. The support cylinder 9 provides stable support for the guide sleeve 27. The guide sleeve 27 provides a moving guide for the piston 24. The piston 24 provides rotational support for the other end of the rocker arm 23 and provides support for the second spring 25. The second spring 25 is elastic and can use its rebound force to provide support for the end plate 26. It can also contract and deform under the action of external force.

[0103] In practical application, workers can place the support cylinder 9 into the joint 2 before installing the lower joint plate 5 and the upper joint plate 6, and move the U-plate 16 using the support cylinder 9 so that the U-plate 16 is fitted onto the outside of the negative reinforcement 3 (e.g., Figure 3After the installation of the first spring 15, the second spring 25, the connecting plate 18, the U plate 16, the negative reinforcement 3, the end disc 26, the lower joint plate 5 and the upper joint plate 6, the push rod 21 can be installed on the outside of the rubber ring 20, and the bolt 22 can be inserted into the T hole 7, and the push rod 21 can be pushed down by the bolt 22, so that the push rod 21 can be moved downward by the external force to contact the foot-shaped block 12, and the foot-shaped block 12 can push the rotating disc 11 to rotate around the rotating rod 10, so that the foot-shaped block 12 can be pushed and rotated to move towards the compression rod 14, and the compression rod 14 can be pushed downward by the rotating force to overcome the friction with the rubber sleeve 13 and press the upper end of the first spring 15, so that the first spring 15 can be compressed and contracted under the support of the connecting plate 18, and the connecting plate 18 can be pushed downward by the U plate 16 through the connecting plate 17, and the rotating disc 11 can rotate to drive the rocker 23 to rotate, so that the rocker 23 can push the piston 24 to move upward along the guide sleeve 27, and the piston 24 can drive the second spring 25 and the end disc 26 to move upward, so that the end disc 26 can move through the guide sleeve 27 to contact the bottom surface of the lower joint plate 5, and the piston 24 can be compressed by the end disc 26 to press the second spring 25, so that the U plate 16 and the negative reinforcement 3 can be connected by the second spring 25 and the first spring 15, and the end disc 26 and the lower joint plate 5 can be connected, so that the negative reinforcement 3 can form a whole force system to improve the bearing capacity.

[0104] After the bolt 22 is screwed into the perforation 8, the push rod 21 can be positioned and resisted, so that the push rod 21 can resist and position the foot-shaped block 12 after the position is adjusted.

[0105] When the upper joint plate 6 and the lower joint plate 5 are pressed by external force, the external force can be transmitted to the end disc 26 through the lower joint plate 5, so that the end disc 26 can push the second spring 25 to deform under the support of the piston 24, and part of the external force can be transmitted to the rocker 23 through the second spring 25 and the piston 24, and transmitted to the first spring 15 through the rocker 23, the rotating disc 11, the rotating rod 10, the supporting cylinder 9 and the compression rod 14, so that the first spring 15 can deform under the action of the external force, and the deformation of the first spring 15 and the second spring 25 can convert the kinetic energy of the vibration into elastic potential energy of the spring, and the energy can be released slowly through elastic recovery, so that the vibration can be avoided from being directly transmitted to the negative reinforcement 3, and the lower joint plate 5 and the upper joint plate 6 can be supported to prevent the deformation of the lower joint plate 5 and the upper joint plate 6 due to excessive external pressure.

[0106] As a preferred embodiment of the present application, the water-permeable member comprises:

[0107] The water-permeable layer 28 is integrally formed on the upper end of the prefabricated bridge deck 1 and has an inclined angle towards the joint 2;

[0108] The water guide groove 29 is formed through the prefabricated bridge deck 1 and located beside the water-permeable layer 28;

[0109] The drain hole 30 is provided in multiple numbers and uniformly formed on the end of the prefabricated bridge deck 1 close to the joint 2 and in communication with the water guide groove 29.

[0110] Specifically, the prefabricated bridge deck 1 can provide stable support for the water-permeable layer 28, the water-permeable layer 28 has good water permeability and can provide a through-flow channel for water, and the inclined angle thereof can cooperate with the prefabricated bridge deck 1 to provide flow guidance for water, so that the water can flow into the water guide groove 29, the water guide groove 29 can collect water and provide a channel for water to enter the drain hole 30, and the drain hole 30 can provide a channel for water to enter the expansion pipe 31.

[0111] The water guide member comprises:

[0112] The expansion pipe 31 is provided in multiple numbers and uniformly arranged in the joint 2, one end of which is connected to the prefabricated bridge deck 1 through a fixing member and in communication with the drain hole 30, and the other end is connected to the support cylinder 9 through a fixing member and in communication with the expansion pipe 31;

[0113] The elbow pipe 33 is provided in multiple numbers and uniformly and symmetrically arranged through the bottom surface of the support cylinder 9 and located between the multiple negative reinforcements 3;

[0114] The support cylinder 9 is symmetrically provided with a recess above, and a plurality of water holes 41 are uniformly formed in the recess and through the top surface of the support cylinder 9.

[0115] Specifically, the expansion pipe 31 is made of metal and can stretch and contract under the action of external force to prevent the thermal expansion and contraction from affecting the prefabricated bridge deck 1, and the expansion pipe 31 can provide flow guidance for water, so that the water can enter the support cylinder 9, the support cylinder 9 can provide support for the elbow pipe 33, the elbow pipe 33 can provide a discharge channel for the water in the support cylinder 9, the recess can be used to receive water entering the joint 2 through the gap of the connecting joint 2 between the lower joint plate 5 and the upper joint plate 6, and the water holes 41 can provide a channel for the water in the recess to enter the support cylinder 9.

[0116] In the actual application process, before the staff installs the lower joint plate 5 and the upper joint plate 6, the telescopic pipe 31 needs to be fixedly connected with the prefabricated bridge deck 1 by using the fixing component, and the telescopic pipe 31 is ensured to be communicated with the corresponding position (the nearest position) of the drain hole 30. When it rains, the rainwater will first fall on the water permeable layer 28, and then seep through the water permeable layer 28 into the water guide groove 29. The rainwater in the water guide groove 29 will flow into the drain hole 30 and then enter the telescopic pipe 31 through the drain hole 30. Subsequently, the rainwater will enter the support cylinder 9 through the telescopic pipe 31 under the action of gravity. The rainwater falling on the lower joint plate 5 and the upper joint plate 6 will flow into the connecting joint 2 gap and the groove 34 between the lower joint plate 5 and the upper joint plate 6, and then fall into the recess through the connecting joint 2 gap, the groove 34 and the through hole 38. Finally, the rainwater will enter the support cylinder 9 through the water hole 41, and then flow into the elbow pipe 33 and flow along the elbow pipe 33 to bypass the negative reinforcement 3 and then be discharged to the outside, so that the contact between the negative reinforcement 3 and water can be reduced, the corrosion probability of the negative reinforcement 3 can be reduced, and the service life of the negative reinforcement 3 can be increased.

[0117] As a preferred embodiment of the present application, the convex grinding member comprises:

[0118] The groove 34 is arranged above the upper joint plate 6 and the lower joint plate 5.

[0119] The through groove 35 is uniformly arranged on the upper joint plate 6 and the lower joint plate 5 and is communicated with the groove 34.

[0120] The rubber block 36 is movably arranged in each groove 34.

[0121] The connecting strip 37 is arranged in the through groove 35 to connect the rubber blocks 36.

[0122] Specifically, the upper joint plate 6 and the lower joint plate 5 can provide the groove 34 and the through groove 35 with an arrangement space, the groove 34 can provide the rubber block 36 with a receiving space, and the through groove 35 can provide the connecting strip 37 with a lifting movement space. The connecting strip 37 can connect the rubber blocks 36 and make the rubber blocks 36 move synchronously.

[0123] The inductive member comprises:

[0124] The through hole 38 is arranged on the bottom surface of the lower joint plate 5 and the upper joint plate 6 and is communicated with the groove 34.

[0125] The electric rod 40 is fixedly arranged on the bottom surface of the lower joint plate 5 and the upper joint plate 6 by the fixing component.

[0126] The push plate 39 is fixedly arranged on the telescopic end of the electric rod 40 and is connected with the rubber block 36 through the through hole 38.

[0127] Rain sensor 32, fixed on the inner bottom wall of the support cylinder 9, is piezoelectric and electrically connected with the electric rod 40.

[0128] Specifically, the through hole 38 can provide space for the telescopic end of the electric rod 40 and the push plate 39 to move up and down, the lower joint plate 5 and the upper joint plate 6 can provide stable support for the electric rod 40 through the fixing component, and the rain sensor 32 can control the electric rod 40 to extend through the signal conditioning module and the controller after sensing the rain impact, and the electric rod 40 can be controlled to retract through the signal conditioning module and the controller after the rain sensor 32 fails to sense the rain impact.

[0129] In the actual application process of the embodiment, when the rain enters the support cylinder 9 through the telescopic pipe 31 and the water hole 41, it will first fall on the rain sensor 32 under the action of gravity, so that the rain sensor 32 senses the rain impact, thereby enabling the electric rod 40 to start. After the electric rod 40 starts, the telescopic end will be extended and push the push plate 39 to move upwards along the through hole 38. At the same time, the push plate 39 will push the rubber block 36 to move upwards under the action of the external force, and the rubber block 36 will drive the connecting strip 37 to move upwards in the through slot 35 under the action of the external force, thereby enabling the connecting strip 37 to drive all the arrayed rubber blocks 36 to move upwards, enabling the rubber block 36 to move upwards out of the recess 34, and thereby forming an arrayed protrusion on the lower joint plate 5 and the upper joint plate 6. When the car tires drive over the lower joint plate 5 and the upper joint plate 6 on a rainy day, the rubber block 36 will increase the friction between the car tires and the upper joint plate 6 and the lower joint plate 5 by virtue of its rubber material and protruding structure under the support of the upper joint plate 6, the lower joint plate 5, the electric rod 40 and the push plate 39, thereby slowing down the tire skidding phenomenon caused by the car driving to the bridge deck joint 2 at the curve on a rainy day, and enabling the bridge deck joint 2 structure to provide safer driving conditions on a rainy day.

[0130] As a preferred embodiment of the present application, a shaft tension test piece is detachably arranged on the outer side of the prefabricated bridge deck 1, which comprises:

[0131] A threaded groove 42 is arranged on the outer side of the end of the negative reinforcement 3 away from the prefabricated bridge deck 1.

[0132] Two counterforce beams 43 are arranged on the outer side of the negative reinforcement 3 at the ends away from each other of the two prefabricated bridge decks 1.

[0133] Rollers 45 are rollingly embedded in the bottom surface of the counterforce beam 43.

[0134] A nut 47 is threadedly connected with the threaded groove 42 and extrudes and fixes the counterforce beam 43 through the steel backing plate 46.

[0135] Specifically, the negative reinforcement 3 can provide a space for the threaded groove 42, the threaded groove 42 can provide a threaded connection space for the nut 47, and the negative reinforcement 3 can provide a mounting space for the counter-force beam 43, the counter-force beam 43 can provide rolling support for the roller 45, the roller 45 can roll under the support of the counter-force beam 43 by using the friction force with the ground, and the counter-force beam 43 can slide in the horizontal direction when subjected to a load. The steel cushion plate 46 is used in combination with the corresponding nut to connect and fix the negative reinforcement 3 and the counter-force beam 43.

[0136] The shaft tension test piece further comprises:

[0137] The steel cushion block 48 is symmetrically arranged on both sides of one of the prefabricated bridge decks 1, and one end is in contact with one of the counter-force beams 43.

[0138] The pressure sensor 49 is arranged at the other end of the steel cushion block 48.

[0139] The jack 51 is symmetrically arranged on both sides of the other prefabricated bridge deck 1, and one end is connected with the other counter-force beam 43, and the other end is in contact with the pressure sensor 49 through the steel sleeve 50.

[0140] Specifically, the steel sleeve is arranged between the pressure sensor 49 and the jack 51, the steel cushion plate 46 is arranged between the counter-force beam 43 and the nut 47, and the steel cushion plate 46 is located outside the negative reinforcement 3. The jack 51 and the pressure sensor 49 are connected through the steel sleeve 50 to prevent deviation during loading. The pressure sensor 49 and the other counter-force beam 43 are tightly compacted through the steel cushion block 48, so that the entire shaft tension test device becomes a self-balancing force system. A plurality of round holes 44 are arranged inside the counter-force beam 43, and the round holes 44 correspond to the end positions of the negative reinforcement 3.

[0141] In actual application, before using the prefabricated bridge deck 1, the worker needs to control the jack 51 to retract, remove the pressure sensor 49, the jack 51, the steel sleeve 50 and the steel cushion block 48, then rotate the nut 47 to loosen it by using the threaded action of the threaded groove 42, and then remove it from the outside of the negative reinforcement 3, then sequentially remove the steel cushion block 48 and the counter-force beam, and then the prefabricated bridge deck 1 that passes the test can be put into use.

[0142] When the worker needs to test the prefabricated bridge deck 1, the counterforce beam 43 on one side is placed first, the negative reinforcement 3 on one side of the prefabricated bridge deck 1 is passed through the round hole 44, the steel pad 46 is sleeved from the end of the negative reinforcement 3 after being passed, the prefabricated bridge deck 1 is fixed with the counterforce beam 43 by using the nut of the corresponding model to cooperate with the threaded groove 42 and the negative reinforcement 3, and the other counterforce beam 43 is fixed with the prefabricated bridge deck 1 in the same way. After the bridge deck test piece and the counterforce beam 43 are fixed, the oil hydraulic jack 51, the steel sleeve 50 and the pressure sensor 49 are placed in sequence on both sides of the prefabricated bridge deck 1, the steel pad 48 is placed in the remaining gap position, the length of the extension of the jack 51 is adjusted to push the steel sleeve 50 and the pressure sensor 49 to move towards the direction of the steel pad 46, so as to compact the gap between the pressure sensor 49, the steel sleeve 50, the steel pad 46 and the jack 51, so as to be in a self-balancing state, the oil hydraulic jacks 51 on both sides are pressurized by using the same oil circuit, the synchronous application of pressure on both sides is ensured, the load is collected by the pressure sensor 49, the jacks 51 are used to top, so that the counterforce beams 43 on both sides are pressed to move outward, since the prefabricated bridge deck 1 and the counterforce beam 43 are fixed, the tension is finally converted into the axial tension of the prefabricated bridge deck 1, the test of the axial tension performance of the prefabricated bridge deck 1 at the joint 2 position is realized, before the prefabricated bridge deck 1 is loaded, the preloading is carried out twice at the rate of 10kN / min, the loading is carried out to 40kN, then the formal loading is carried out at the same rate until the final failure.

[0143] The above is the preferred embodiment of the present application, it should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A bridge deck joint structure with axial tensile testing function in the negative bending moment zone, comprising two precast bridge decks and a joint located between the two precast bridge decks, wherein multiple negative reinforcement bars are uniformly and continuously arranged inside the two precast bridge decks to bear the negative bending moment tensile force, characterized in that, Also includes: One of the precast bridge panels is connected to a lower seam plate by a fixing component, and the other precast bridge panel is provided with an upper seam plate by a fixing component, which cooperates with the lower seam plate. The lower seam plate and the upper seam plate cover the seam. The upper seam plate has a T-hole through it, and the lower seam plate has a through hole through it. A connecting support is provided above the negative reinforcement and extends through the lower seam plate and the upper seam plate. It includes a connecting pressure member that connects multiple negative reinforcements and a pushing member that extends through the connecting pressure member to interconnect multiple negative reinforcements and provide support for the lower seam plate and the upper seam plate. A drainage section is provided through the precast bridge deck and the connecting brace to guide and discharge rainwater and delay the corrosion of the negative reinforcement. It includes a permeable component that penetrates the precast bridge deck and a water guide component that penetrates the connecting brace, and the water guide component is located between the multiple negative reinforcements. The anti-slip part is provided through the lower seam plate and the upper seam plate and is located in the connecting support part to cooperate with the water-repellent part. It includes convex abrasive members symmetrically arranged through the upper seam plate and the lower seam plate, and a sensing element provided in the connecting support part, so as to provide anti-slip on the lower seam plate and the upper seam plate in rainy weather. The connecting pressure member includes: The support tube is installed inside the joint and above the negative reinforcement. Multiple turntables are evenly and symmetrically arranged inside the support cylinder and are rotatably connected to the support cylinder. Foot-shaped blocks are eccentrically connected to the turntable; Multiple push rods are provided, with a sealed through-hole at the upper end of the support cylinder, and each extends through a through-hole into the T-hole; Supporting components, with a sealed through-support cylinder design; The pusher includes: The joystick rotates at one end and is eccentrically connected to the end face of the turntable; The guide sleeve is symmetrically installed above the support cylinder and corresponds to the position of the turntable; The piston is rotatably connected to the other end of the rocker arm and is located inside the guide sleeve; The second spring is mounted on the piston; The end plate is fixed to the upper end of the second spring and is located below the lower seam plate; The convex grinding element includes: Grooves are arrayed above the upper and lower seam panels; The through grooves are evenly distributed on the upper and lower seam plates and are connected to the grooves. Multiple rubber blocks are movably set within each groove. Connecting strips are installed in the through groove to connect multiple rubber blocks to each other; A detachable axial tension test piece is provided on the outer side of the precast bridge deck, and the axial tension test piece includes: The threaded groove is located on the outer side of the negative reinforcement at the end furthest from the precast bridge deck. There are two reaction beams, which are respectively set at the ends of the two precast bridge decks that are far apart from each other, and are sleeved on the outside of the negative reinforcement. Rollers are embedded in the bottom surface of the reaction beam. The nut is threaded into the threaded groove and the reaction beam is fixed by compression through a steel pad.

2. The bridge deck joint structure in the negative bending moment zone according to claim 1, characterized in that, The connecting component includes: The rubber sleeve is symmetrically arranged through the bottom surface of the support cylinder and located below the foot block; The pressure bar is installed through the rubber sleeve and is frictionally connected to the rubber sleeve; The first spring is fixed to the lower end of the pressure rod; The U-shaped plate has two symmetrically arranged on the outer side of each negative rib; Multiple connecting plates are respectively connected between the two U-plates disposed on the outer side of each negative rib; A connecting plate is connected between the plurality of connecting plates and is connected to the lower end of the first spring.

3. The bridge deck joint structure in the negative bending moment zone according to claim 2, characterized in that, The permeable element includes: The permeable layer is integrally formed on the upper part of the precast bridge deck and has an inclined angle toward the joint; The water channel is cut through the precast bridge deck and located on one side of the permeable layer; The perforated section has multiple holes, which are evenly distributed at one end of the precast bridge deck near the joint and are connected to the water guide channel.

4. The bridge deck joint structure in the negative bending moment zone according to claim 3, characterized in that, The water guiding component includes: Multiple telescopic pipes are evenly arranged in the joint. One end is connected to the precast bridge panel through a fixing component and communicates with the drainage hole. The other end is connected to the support cylinder through a fixing component and communicates with the telescopic pipe. The bend has multiple evenly and symmetrically arranged bottom surfaces that penetrate the support cylinder and are located between the multiple negative ribs; The support cylinder has symmetrical recesses on its upper surface, and multiple water holes are evenly distributed in the recesses, penetrating the top surface of the support cylinder.

5. The bridge deck joint structure in the negative bending moment zone according to claim 4, characterized in that, The sensing element includes: The opening is located on the bottom surface of the lower and upper seam panels and communicates with the groove. The electric pole is fixed to the bottom surface of the lower and upper seam panels by fixing components; The push plate is fixed to the telescopic end of the electric pole and is connected to the rubber block through the through-hole; The rain sensor, which is piezoelectric, is fixed to the inner bottom wall of the support cylinder and is electrically connected to the motor.

6. The bridge deck joint structure in the negative bending moment zone according to claim 5, characterized in that, The shaft tensile test specimen also includes: Steel pads are symmetrically arranged on both sides of one of the precast bridge decks, with one end in contact with one of the reaction beams; The pressure sensor is located at the other end of the steel pad. The jacks are symmetrically arranged on both sides of the other precast bridge deck, with one end connected to the other reaction beam and the other end in contact with the pressure sensor through a steel sleeve.

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