A curing device for high-strength and fast-hardening shotcrete of carbonaceous slate tunnel

Abstract

The utility model discloses a kind of curing devices for carbonaceous slate tunnel high-strength fast-hardness shotcrete, it is related to concrete curing technical field, including two arc beams, arc water tank fixedly installed between two arc beams and multiple atomizing nozzles set on arc water tank, arc water tank is connected with water inlet pipe;Fitting sealing mechanism, including air bag fixedly installed on the outer surface of arc beam and pneumatic assembly for inflating air bag to make it expand and fit tunnel inner wall, by the mutual cooperation of impact block, connecting slide plate, support rod, spring, mounting bracket, gyro wheel, trapezoidal push block and electric push rod, condensate water attached to arc beam is rapidly shaken off, and is guided into collection bin and discharged centrally via the communication hole on lower baffle, avoid curing water and condensate water along tunnel wall to flow to side wall bottom, to effectively prevent carbonaceous slate surrounding rock from being soaked by water and strength sudden drop.

Description

Technical Field

[0001] This utility model relates to the field of concrete curing technology, specifically a curing device for high-strength, fast-hardening shotcrete in carbonaceous slate tunnels. Background Technology

[0002] Shotcrete is a widely used support technology in modern tunnel construction. It can quickly seal the surrounding rock and effectively control deformation. For high-strength, fast-hardening concrete, its rapid early strength gain is crucial for the stability and advancement speed of tunnel projects. Therefore, after shotcreting, it is essential to perform timely and sufficient curing to ensure the humidity required for its hydration reaction, prevent cracking, and ensure that it ultimately reaches the design strength.

[0003] In existing technologies, the curing of concrete in tunnels is mostly done by manual watering or installing simple spray systems. However, a large amount of water mist is lost into the tunnel space, failing to effectively reach the concrete surface and easily leading to water accumulation within the tunnel. For geological conditions like carbonaceous slate, which softens easily when exposed to water, excess water droplets flow down the tunnel walls during curing, accumulating at the bottom of the sidewalls and soaking the carbonaceous slate. This causes a sharp decrease in the strength of the surrounding rock, resulting in significant convergence deformation and potentially even local collapse, affecting construction safety. Therefore, based on the above research and existing technologies, a curing device for high-strength, rapid-hardening shotcrete in carbonaceous slate tunnels is proposed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a curing device for high-strength, fast-hardening shotcrete in carbonaceous slate tunnels, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A curing device for high-strength, rapid-hardening shotcrete in carbonaceous slate tunnels, comprising:

[0007] The spray maintenance mechanism includes two arc-shaped beams, an arc-shaped water tank fixedly installed between the two arc-shaped beams, and multiple atomizing nozzles disposed on the arc-shaped water tank, wherein the arc-shaped water tank is connected to a water inlet pipe;

[0008] The sealing mechanism includes an airbag fixedly installed on the outer surface of the arc-shaped beam and a pneumatic assembly for inflating the airbag to make it expand and fit against the inner wall of the tunnel.

[0009] Furthermore, the condensate collection mechanism includes:

[0010] The lower baffle is fixedly installed on the bottom surface of the arc-shaped water tank;

[0011] The collection chamber is fixedly installed on the bottom surface of the lower baffle, and a drain valve is provided at its bottom;

[0012] A vibration assembly, mounted on the lower baffle, is used to periodically strike the arc-shaped beam to shake off water droplets on its surface, causing the water droplets to fall into the collection chamber through the connecting holes on the lower baffle.

[0013] Furthermore, the vibration assembly includes:

[0014] The impact block, which is slidably connected to the top surface of the lower baffle, has a U-shaped structure and its position corresponds to the bottom of the arc-shaped beam;

[0015] The drive unit is installed on the bottom surface of the lower baffle and is used to drive the impact block to reciprocate.

[0016] Furthermore, the driving unit includes:

[0017] A trapezoidal push block is slidably connected to the bottom surface of the lower baffle;

[0018] An electric push rod is fixedly installed on the bottom surface of the lower baffle, and its telescopic shaft is connected to the trapezoidal push block;

[0019] The connecting slide is fixedly connected to the impact block and slidably disposed within the sliding hole of the lower baffle;

[0020] The roller is rotatably connected to the bottom surface of the connecting slide plate via a mounting bracket and abuts against the inclined surface of the trapezoidal push block;

[0021] A spring, fitted onto a support rod within the sliding hole, provides a restoring force for the connecting slide plate and the impact block.

[0022] Furthermore, it also includes a steam curing mechanism, which comprises:

[0023] A steam generator is fixedly installed on the top surface of the connecting bracket;

[0024] A steam inlet pipe is connected to the steam generator, and its two ends pass through the arc-shaped beam;

[0025] A steam nozzle is fixedly installed at the end of the steam inlet pipe;

[0026] A thermometer is fixedly installed on the outer surface of the curved beam to monitor the temperature of the maintenance environment.

[0027] Furthermore, the pneumatic assembly includes an air intake pipe and an air pump. The air intake pipe has a T-shaped structure, with both ends passing through the arc-shaped beam and connected to the airbag. The air pump is fixedly installed at the lower end of the air intake pipe.

[0028] Furthermore, it also includes a connection and reinforcement mechanism, which comprises:

[0029] The connecting bracket, located on the bottom surface of the arc-shaped beam, has an inverted U-shaped structure and fixing holes on both sides for fixing the entire device to the trolley with bolts.

[0030] Support plates are fixedly installed on the two opposite sides of the two curved beams;

[0031] A fixing block is added and fixedly installed between the two arc-shaped beams.

[0032] Furthermore, several flexible plates for fitting against the inner wall of the tunnel are fixed to the outer side of the lower baffle.

[0033] Furthermore, the outer walls of the two arc-shaped beams and the arc-shaped water tank are coated with a hydrophobic layer.

[0034] Furthermore, several reinforcing beams are fixedly installed on the top surface of the connecting bracket, and their top surfaces are fixedly connected to the top surface of the supporting guard plate. The reinforcing beams are X-shaped structures used to enhance the overall structural support.

[0035] Compared with the prior art, the beneficial effects of this utility model are:

[0036] 1. By combining the curved beam, curved water tank, atomizing nozzle and water inlet pipe, a uniform water mist field covering the entire curved surface of the tunnel is formed. Meanwhile, the steam generator, steam inlet pipe and steam nozzle can provide saturated steam, providing sufficient humidity and suitable temperature for the high-strength and fast-hardening concrete, creating the best curing environment.

[0037] The condensate adhering to the curved beam is quickly shaken off by the interaction of the impact block, connecting slide plate, support rod, spring, mounting bracket, roller, trapezoidal push block and electric push rod. The condensate is then guided into the collection chamber through the connecting hole on the lower baffle and discharged in a centralized manner. This prevents the maintenance water and condensate from flowing down the tunnel wall to the bottom of the sidewall, thus effectively preventing the carbonaceous slate surrounding rock from losing strength due to water immersion. It also eliminates the risk of convergence deformation and collapse caused by water, ensuring high safety. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0039] Figure 2 This is a schematic diagram of the connection structure between the lower baffle and the arc-shaped beam of this utility model;

[0040] Figure 3 This is a bottom view schematic diagram of the connection structure between the collection bin and the lower baffle of this utility model;

[0041] Figure 4This is a bottom view of the connection structure of the sliding hole and the connecting plate of this utility model.

[0042] In the diagram: 1. Arc-shaped beam; 2. Arc-shaped water tank; 3. Atomizing nozzle; 4. Water inlet pipe; 5. Connecting bracket; 6. Fixing hole; 7. Lower baffle; 8. Support guard plate; 9. Airbag; 10. Reinforcing beam; 11. Steam generator; 12. Steam inlet pipe; 13. Collection chamber; 14. Flexible plate; 15. Impact block; 16. Steam nozzle; 17. Thermometer; 18. Fixing block; 19. Electric push rod; 20. Drain valve; 21. Air inlet pipe; 22. Air pump; 23. Trapezoidal push block; 24. Limiting groove; 25. Limiting slider; 26. Limiting support rod; 27. Connecting hole; 28. Sliding hole; 29. ​​Connecting slide plate; 30. Mounting bracket; 31. Roller; 32. Support rod; 33. Spring. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] In one typical embodiment of this application, please refer to Figures 1-4 A curing device for high-strength, rapid-hardening shotcrete in carbonaceous slate tunnels is disclosed, comprising a spray curing mechanism. The spray curing mechanism mainly consists of two arc-shaped beams 1, an arc-shaped water tank 2, several atomizing nozzles 3, and a water inlet pipe 4. The positioning block arc-shaped water tank 2 is installed between the two arc-shaped beams 1 by welding or other fixing methods. Several atomizing nozzles 3 are installed at equal angles along the arc surface of the arc-shaped water tank 2 and communicate with the interior of the arc-shaped water tank 2. The water inlet pipe 4 is fixedly installed on the bottom surface of the arc-shaped water tank 2, and its front end is equipped with a flange for connecting to an external water supply pipe.

[0045] The positioning block sealing mechanism includes an airbag 9, an air inlet pipe 21, and an air pump 22. The airbag 9 is fixedly installed on the outer surface of the arc beam 1 by adhesive or pressure strip. The air inlet pipe 21 has a T-shaped structure, with its two ends passing through the two arc beams 1 and communicating with the interior of the corresponding airbag 9. The air pump 22 is fixedly installed at the lower end of the air inlet pipe 21 and is responsible for providing the air source.

[0046] Specifically, during operation, the operator first connects to an external water source through the water inlet pipe 4. After the water flows into the arc-shaped water tank 2, it is evenly sprayed out by multiple atomizing nozzles 3 to form a water mist, which moisturizes and cures the concrete on the inner wall of the tunnel. At the same time, the air pump 22 is started, and air is forced into two airbags 9 through the air inlet pipe 21, causing them to expand and fit tightly against the inner wall of the tunnel. The airbags 9 not only isolate the curing area from the outside, forming a relatively closed curing space, reducing the loss of moisture and heat and improving curing efficiency, but their fitting effect also allows the device to adapt to a certain range of tunnel contour changes.

[0047] The condensate collection mechanism includes a lower baffle 7, a collection chamber 13, a drain valve 20, and a vibration assembly. The lower baffle 7 is fixedly installed on the bottom surface of the arc-shaped water tank 2, and its top surface has a connecting hole 27. A soft rubber plate 14 is installed on the outside to better fit the tunnel. The collection chamber 13 is fixedly installed on the bottom surface of the lower baffle 7 to collect liquid, and a drain valve 20 is installed at its bottom.

[0048] The vibration assembly is used to remove condensate from the arc-shaped beam 1 and the arc-shaped water tank 2. It includes an impact block 15, a connecting slide plate 29, a sliding hole 28, a support rod 32, a spring 33, a mounting bracket 30, a roller 31, a trapezoidal push block 23, an electric push rod 19, a limiting slide groove 24, a limiting slider 25, and a limiting support rod 26. The impact block 15 has a U-shaped structure and is slidably connected to the top surface of the lower baffle 7, used to strike the bottom ends of the two arc-shaped beams 1. The connecting slide plate 29 is fixedly installed on the bottom surface of the impact block 15. The top surface of the lower baffle 7 has a sliding hole 28, and the support rod 32 is fixedly installed inside the sliding hole 28, with the connecting slide plate 29 slidably connected to the support rod 32. The spring 33 is movably sleeved on the outer circular wall surface of the support rod 32. The mounting bracket 30 is fixedly installed on the bottom surface of the connecting slide plate 29, and the roller 31 is rotatably connected inside the mounting bracket 30 via a rotating shaft. The trapezoidal push block 23 is trapezoidal in shape and slidably connected to the bottom surface of the lower baffle 7. An electric push rod 19 is fixedly installed on the bottom surface of the lower baffle 7. One end of its telescopic shaft is fixedly connected to the left side of the trapezoidal push block 23 for driving the trapezoidal push block 23 to move. In the initial state, the roller 31 abuts against the narrow part of the trapezoidal push block 23. A limiting groove 24 is opened on the bottom surface of the lower baffle 7. A limiting support rod 26 is fixedly installed inside the limiting groove 24. A limiting slider 25 is fixedly installed on the top surface of the trapezoidal push block 23 and is slidably connected to the limiting support rod 26, thereby guiding and limiting the movement of the trapezoidal push block 23.

[0049] Specifically, during spray and steam curing, the electric push rod 19 is activated, and its telescopic axis moves outward, causing the trapezoidal push block 23 to move outward. The inclined surface of the trapezoidal push block 23, from narrow to wide, presses against the roller 31. After being compressed, the roller 31 pushes the connecting slide plate 29 outward along the support rod 32 via the mounting bracket 30, compressing the spring 33, thereby causing the impact block 15 to move outward. Subsequently, the electric push rod 19 retracts, and the trapezoidal push block 23 returns to its original position. After the compression is released, the restoring force of the spring 33 pushes the connecting slide plate 29 and the impact block 15 violently back inward, and the U-shaped impact block 15 strikes the bottom ends of the two arc-shaped beams 1, generating vibration. This vibration causes the water droplets attached to the curved beam 1 and the curved water tank 2 to fall off quickly. The fallen water droplets flow down the curved surface and enter the collection chamber 13 through the connecting hole 27. Finally, they are discharged by the drain valve 20, which actively removes the condensate and effectively prevents water from flowing to the bottom of the tunnel sidewall and soaking the carbonaceous slate, thus avoiding safety hazards such as the decrease in the strength of the surrounding rock and convergence deformation.

[0050] The steam curing mechanism is used for heating and curing when needed. It includes a steam generator 11, a steam inlet pipe 12, a steam nozzle 16, and a thermometer 17. The steam generator 11 is fixed to the top surface of the connecting bracket 5. The steam inlet pipe 12 is a T-shaped pipe with an elbow. One end of the pipe is connected to the steam generator 11, and the other two ends pass through two arc-shaped beams 1 respectively. The steam nozzle 16 is fixedly sleeved at the end of the steam inlet pipe 12, and the thermometer 17 is installed on the outer surface of the arc-shaped beams 1.

[0051] Specifically, when steam curing is required, the steam generator 11 is started, and the generated steam is sprayed out from the steam nozzle 16 through the steam inlet pipe 12, filling the curing space sealed by the airbag 9 to heat and humidify the concrete for curing. The thermometer 17 can monitor the temperature of the area in real time, which makes it easy for staff to accurately control the amount of steam.

[0052] The connection and reinforcement mechanism ensures the overall stability of the device and includes a connecting bracket 5, a support plate 8, reinforcement fixing blocks 18, and a reinforcement beam 10. The connecting bracket 5 has an inverted U-shaped structure, located below the arc-shaped beam 1, and has multiple fixing holes 6 on both sides, allowing the entire device to be fixed to the trolley with bolts. The support plate 8 is fixed to the outside of the two arc-shaped beams 1, and the reinforcement fixing blocks 18 provide additional connection and reinforcement between the two arc-shaped beams 1. The reinforcement beam 10 has an X-shaped structure, with its bottom fixed to the connecting bracket 5 and its top fixedly connected to the support plate 8, forming a stable triangular support structure. Several reinforcement fixing blocks 18 are fixedly installed between the two arc-shaped beams 1 for reinforcement.

[0053] Specifically, by using bolts and fixing holes 6, the entire device can be securely installed on the tunnel construction trolley and moved with the trolley to achieve segmented maintenance. The X-shaped reinforcing beam 10 greatly enhances the rigidity and stability of the overall structure, ensuring that the device can work stably and without deformation in the complex environment of the tunnel.

[0054] Preferably, a hydrophobic layer is coated on the outer walls of both arc-shaped beams 1 and the arc-shaped water tank 2. This hydrophobic layer can effectively reduce the adhesion of water mist on the surface of the device, making it harder for water droplets to stay and easier to shake off or flow away, thus working in conjunction with the condensate collection mechanism to further improve the waterproofing effect.

[0055] The above positioning blocks are only preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and utility model concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A curing device for high-strength, rapid-hardening shotcrete in carbonaceous slate tunnels, characterized in that, include: The spray maintenance mechanism includes two arc-shaped beams (1), an arc-shaped water tank (2) fixedly installed between the two arc-shaped beams (1), and a plurality of atomizing nozzles (3) set on the arc-shaped water tank (2). The arc-shaped water tank (2) is connected to a water inlet pipe (4). The sealing mechanism includes an airbag (9) fixedly installed on the outer surface of the arc beam (1) and a pneumatic assembly for inflating the airbag (9) to make it expand and fit against the inner wall of the tunnel. It also includes a connection and reinforcement mechanism, which includes: The connecting bracket (5) is set on the bottom surface of the arc beam (1), and has an inverted U-shaped structure. Fixing holes (6) are provided on both sides for fixing the entire device to the trolley by bolts. Support plates (8) are fixedly installed on the two opposite sides of the two arc-shaped beams (1); A fixing block (18) is added and fixedly installed between the two arc-shaped beams (1).

2. The maintenance device according to claim 1, characterized in that, It also includes a condensate collection mechanism, which comprises: The lower baffle (7) is fixedly installed on the bottom surface of the arc-shaped water tank (2); The collection chamber (13) is fixedly installed on the bottom surface of the lower baffle (7), and a drain valve (20) is provided at its bottom. A vibration assembly, installed on the lower baffle (7), is used to periodically strike the arc beam (1) to shake off water droplets on its surface, so that the water droplets fall into the collection chamber (13) through the connecting hole (27) on the lower baffle (7).

3. The maintenance device according to claim 2, characterized in that, The vibration assembly includes: The impact block (15) is slidably connected to the top surface of the lower baffle (7), and has a U-shaped structure. Its position corresponds to the bottom of the arc beam (1). The drive unit is installed on the bottom surface of the lower baffle (7) and is used to drive the impact block (15) to reciprocate.

4. The maintenance device according to claim 3, characterized in that, The drive unit includes: The trapezoidal pusher (23) is slidably connected to the bottom surface of the lower baffle (7); An electric push rod (19) is fixedly installed on the bottom surface of the lower baffle (7), and its telescopic shaft is connected to the trapezoidal push block (23); The connecting slide (29) is fixedly connected to the impact block (15) and slidably disposed in the sliding hole (28) of the lower baffle (7); The roller (31) is rotatably connected to the bottom surface of the connecting slide plate (29) via the mounting bracket (30) and abuts against the inclined surface of the trapezoidal push block (23); A spring (33), fitted onto a support rod (32) within the sliding hole (28), provides a restoring force for the connecting slide plate (29) and the impact block (15).

5. The maintenance device according to claim 1, characterized in that, It also includes a steam curing mechanism, which comprises: A steam generator (11) is fixedly installed on the top surface of the connecting bracket (5); Steam inlet pipe (12) is connected to the steam generator (11), and its two ends pass through the arc-shaped beam (1); A steam nozzle (16) is fixedly installed at the end of the steam inlet pipe (12); A thermometer (17) is fixedly installed on the outer surface of the arc-shaped beam (1) for monitoring the temperature of the maintenance environment.

6. The maintenance device according to claim 1, characterized in that, The pneumatic assembly includes an air inlet pipe (21) and an air pump (22). The air inlet pipe (21) has a T-shaped structure, with both ends passing through the arc-shaped beam (1) and connected to the airbag (9). The air pump (22) is fixedly installed at the lower end of the air inlet pipe (21).

7. The maintenance device according to claim 2, characterized in that, Several flexible plates (14) for fitting against the inner wall of the tunnel are fixed on the outer side of the lower baffle (7).

8. The maintenance device according to claim 1, characterized in that, The outer walls of the two arc-shaped beams (1) and the arc-shaped water tank (2) are coated with a hydrophobic layer.

9. The maintenance device according to claim 1, characterized in that, Several reinforcing beams (10) are fixedly installed on the top surface of the connecting bracket (5), and their top surfaces are fixedly connected to the top surface of the supporting guard plate (8). The reinforcing beams (10) are X-shaped structures used to enhance the overall structural support.

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