Concrete pouring device for tunnel construction

Abstract

The invention discloses a concrete pouring device for tunnel construction, which comprises a pouring vehicle, and a nozzle for pouring concrete is arranged in front of the pouring vehicle; the baffle is arranged at the bottom of the pouring vehicle and abuts against at least two adjacent arch ribs; and the film covering assembly comprises a film covering roller, the film covering roller is located between the nozzle and the baffle, a film is wound around the film covering roller, and the film covering roller can rotate along with movement of the pouring vehicle so that the film can be released to the position between the arch frame and the baffle, and the concrete and the baffle can be separated. According to the device, the film covering assembly is arranged in front of the baffle, and a film is released through the film covering roller and can be attached to the surface of concrete, so that the concrete and the baffle are isolated, and the phenomenon that the concrete is attached to the baffle, and consequently the surface of the concrete is sunken is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly to a concrete pouring device for tunnel construction. Background Art

[0002] An arch frame is a frame used for tunnel construction, which includes several arch ribs bent along the arc of the tunnel cross-section, and multiple arch ribs are arranged at intervals. During construction, it is necessary to spray concrete into the area between adjacent arch ribs to form an effective tunnel support.

[0003] During the process of spraying concrete, a trolley needs to move along the arch rib. A nozzle is provided at the front end of the trolley for pouring concrete, and a baffle or a belt is arranged at the bottom of the trolley. The nozzle pours concrete at the front end, and then the concrete is leveled by the baffle or the belt to make the concrete surface flat and flush with the surface of the arch rib.

[0004] As recorded in the invention patent with the publication number "CN117432444A" and the patent name "Low rebound construction method for tunnel support concrete based on continuous pouring with a movable formwork": It includes the steps: S1. Move the movable formwork device to the starting pouring position of the arch frame; S2. Make the limiting mechanism of the movable formwork device contact the inner arc surface of the arch frame; S3. Pour concrete between two arch frames; S4. After the concrete strength reaches the requirement, move the movable formwork device to the next pouring position and make the limiting mechanism contact the inner arc surface of the arch frame;

[0005] S5. Pour concrete between two arch frames again; S6. Move the movable formwork device to the end pouring position and finally pour concrete between two arch frames. In the record of the above invention patent, the concrete poured on the arch frame is leveled by the crawler plate.

[0006] However, during the pouring process, the crawler plate continuously rotates around the crawler wheel, which causes the crawler plate to separate from the concrete surface after leveling the concrete. The concrete is easily adhered to the crawler plate and moves together with the crawler plate, resulting in many depressions on the concrete surface and low construction quality.

[0007] At the same time, due to the extrusion and leveling effect of the crawler plate on the concrete, the force between the crawler plate and the concrete is relatively large, which exacerbates the phenomenon that the above-mentioned concrete adheres to the crawler plate and causes the concrete surface to be uneven. Summary of the Invention

[0008] Aiming at the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a concrete pouring device for tunnel construction, which is used to solve the problems such as concrete adhering to the crawler plate during tunnel construction and resulting in depressions on the concrete surface.

[0009] The technical solution adopted by the present invention to solve its technical problems is a concrete pouring device for tunnel construction, which is arranged on the arch frame of the tunnel. The arch frame includes a plurality of arch ribs arranged at intervals. The concrete pouring device is used to pour concrete into the pouring area between any two adjacent arch ribs. The concrete pouring device includes:

[0010] A pouring vehicle, with a nozzle for pouring concrete arranged in front of the pouring vehicle;

[0011] A baffle, which is arranged at the bottom of the pouring vehicle and abuts against at least two adjacent arch ribs;

[0012] A film covering assembly, including a film covering roller. The film covering roller is located between the nozzle and the baffle. A film is wound around the film covering roller. The film covering roller can rotate as the pouring vehicle moves, so as to release the film between the arch frame and the baffle and separate the concrete from the baffle.

[0013] Further, the width of the film is greater than the width of the pouring area.

[0014] Further, the film covering assembly further includes two connecting rods. One ends of the two connecting rods are respectively rotatably connected to the two ends of the film covering roller, and the other ends of the two connecting rods are fixedly arranged at the front end of the pouring vehicle;

[0015] Define the position where the film is released from the film covering roller as the first position, and define the front end of the baffle as the second position; the distance from the first position to the arch rib is less than the distance from the second position to the arch rib.

[0016] Further, the film covering assembly further includes two connecting rods. One ends of the two connecting rods are respectively rotatably connected to the two ends of the film covering roller, and the other ends of the two connecting rods are rotatably arranged at the front end of the pouring vehicle.

[0017] Further, a first spring is arranged between the connecting rod and the pouring vehicle. The first spring is used to provide a pre-tightening force for making the connecting rod rotate towards the arch rib along the film covering roller.

[0018] Further, the front end of the baffle has a guiding portion, and the guiding portion is bent gradually away from the arch rib direction from the baffle towards the film covering roller direction.

[0019] Further, the front end of the baffle is fixedly connected to the pouring vehicle, and the rear end of the baffle is elastically connected to the pouring vehicle.

[0020] Further, a first connecting portion is provided at the rear end of the baffle plate, a second connecting portion is provided at the rear end of the pouring vehicle, and a second spring is provided between the first connecting portion and the second connecting portion. Compressing or releasing the second spring deforms the baffle plate to fit the arch rib.

[0021] Further, the second spring is arranged along the length direction of the baffle plate.

[0022] Further, a plurality of pre-tightening members are arranged on the pouring vehicle. The pre-tightening member includes a mounting bracket and a wheel bracket. The mounting bracket is floatingly connected to the pouring vehicle. The wheel bracket is rotatably connected to the mounting bracket. Two pre-tightening wheels are mounted on the wheel bracket, and the pre-tightening wheels abut against the side of the baffle plate away from the arch rib.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] (1) A film covering assembly is provided in front of the baffle plate. The film is released through the film covering roller, so that the film can adhere to the concrete surface, thereby isolating the concrete from the baffle plate and avoiding the phenomenon that the concrete adheres to the baffle plate and causes depressions on the concrete surface.

[0025] (2) The covering of the film is realized during the pouring process. The two processes of pouring and film covering are synchronized and can be realized by one device, which simplifies the construction process, improves the construction efficiency and reduces the construction cost.

[0026] (3) Rubber strips or adhesives and other components are added to the edge positions on both sides of the film, so that both sides of the film can be respectively adhered to two adjacent arch ribs. When pouring to the top of the arch frame, the film is under the concrete and plays a role in supporting the concrete during the stage when the concrete is not solidified, avoiding the phenomenon that the concrete drops under its own gravity and causes depressions on the concrete surface.

[0027] (4) The front end of the baffle plate is fixedly connected to the pouring vehicle, and the rear end of the baffle plate is elastically connected to the pouring vehicle. When the curvature of the arch rib changes, the rear end of the baffle plate can move relative to the pouring vehicle to allow partial deformation of the baffle plate until it fits the arch rib, so that the concrete at each position can be tamped and leveled by the baffle plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of an arch frame and a concrete pouring device in an embodiment;

[0029] Figure 2 It is a schematic structural diagram of a concrete pouring device in an embodiment;

[0030] In the figure:

[0031] 100. Arch frame; 110. Arch rib; 120. Pouring area;

[0032] 200. Pouring vehicle; 210. Mounting frame; 220. Wheel frame; 230. Pre-tightening wheel; 240. Second spring; 250. Nozzle;

[0033] 300. Baffle; 310. Guide part;

[0034] 400. Film covering roller; 410. Connecting rod. Detailed implementation mode

[0035] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0036] Please refer to Figure 1 - Figure 2 , the present invention discloses a concrete pouring device for tunnel construction, which is arranged on the arch frame 100 of the tunnel. The arch frame 100 includes a plurality of arch ribs 110 arranged at intervals. The concrete pouring device is used to pour concrete into the pouring area 120 between any two adjacent arch ribs 110. The concrete pouring device includes:

[0037] Pouring vehicle 200, and a nozzle 250 for pouring concrete is arranged in front of the pouring vehicle 200;

[0038] Baffle 300, which is arranged at the bottom of the pouring vehicle 200 and abuts against at least two adjacent arch ribs 110;

[0039] Film covering assembly, including a film covering roller 400. The film covering roller 400 is located between the nozzle 250 and the baffle 300. A film is wound on the film covering roller 400. The film covering roller 400 can rotate following the movement of the pouring vehicle 200 to release the film between the arch frame 100 and the baffle 300 and separate the concrete from the baffle.

[0040] Specifically, the pouring vehicle 200 travels along the arch frame 100. During the traveling process, the nozzle 250 sprays concrete, the film covering roller 400 releases the film, and at the same time the baffle 300 presses the film on the concrete surface and levels the concrete to achieve the pouring of concrete.

[0041] In this application, a film covering assembly is arranged in front of the baffle 300. By releasing the film through the film covering roller 400, the film can adhere to the concrete surface, thereby isolating the concrete from the baffle 300 and avoiding the phenomenon that the concrete adheres to the baffle 300 and causes depressions on the concrete surface.

[0042] At the same time, during the construction process, since the baffle 300 can exert pressure on the film, the baffle 300 can still smooth the concrete, but it is no longer in direct contact with the concrete. In this way, while retaining the function of the baffle 300 to smooth the concrete, the film can also isolate the concrete and the baffle 300 to prevent the concrete from adhering to the baffle 300.

[0043] It is worth mentioning that the film coating roller 400 can release the film synchronously with the movement of the pouring vehicle 200, without the need for an additional power source to drive it. Specifically, the baffle 300 can press the film, so that the film pulls the film coating roller 400 to rotate and continuously release new film to cover the concrete surface. Not only does it not require an additional drive source, but it can also always keep the film coating roller 400 and the pouring vehicle 200 in synchronous motion.

[0044] It should be noted that before construction, the film needs to be pulled to the bottom of the baffle 300 and the baffle 300 presses the film; then the concrete is poured. When the space below the baffle 300 is filled with concrete, the pouring vehicle 200 can move along the arch 100 and the coating roller 400 can be pulled to release the film.

[0045] It can be understood that the film covering the surface of concrete can lock the moisture in the concrete, so that the concrete can fully solidify and harden at appropriate humidity and temperature, which helps to improve the quality and durability of the concrete.

[0046] Based on this, in the existing construction, there is also a process of covering the film with another film covering and curing trolley after pouring.

[0047] It can be seen that the present application realizes film covering during the pouring process at the same time, and the pouring and film covering processes are carried out simultaneously and can be realized through one device, which simplifies the construction process, improves construction efficiency and reduces construction costs.

[0048] Furthermore, the width of the film is greater than the width of the casting area 120 .

[0049] The width of the film is greater than the width of the casting area 120. That is, both sides of the film can be directly attached to the two arch ribs 110, covering the entire casting area 120 in the width direction, which can completely avoid the contact between the concrete and the baffle 300, and prevent the phenomenon of concrete adhering to the baffle 300.

[0050] Further, adhesive strips or adhesives can be added to the edge positions on both sides of the film, so that both sides of the film can be respectively adhered to two adjacent arch ribs 110. The advantage of this setting is that the film can form an integral body with the arch ribs 110. When pouring to the top of the arch frame 100, the film is under the concrete and plays a role in supporting the concrete during the stage when the concrete is not solidified, avoiding the phenomenon that the concrete drops under its own gravity and causes the surface of the concrete to sink.

[0051] Further, the film covering assembly further includes two connecting rods 410. One ends of the two connecting rods 410 are respectively rotatably connected to both ends of the film covering roller 400, and the other ends of the two connecting rods 410 are fixedly arranged at the front end of the pouring vehicle 200;

[0052] Define the position where the film is released from the film covering roller 400 as the first position, and define the front end of the baffle 300 as the second position; the distance from the first position to the arch rib 110 is less than the distance from the second position to the arch rib 110.

[0053] First, it should be noted that the first position refers to the position where the film wound on the film covering roller 400 just starts to separate from the film covering roller 400. As Figure 2 shown, the first position is at the bottommost of the entire film covering roller 400.

[0054] In this application, the distance from the first position to the arch rib 110 is less than the distance from the second position to the arch rib 110. That is to say, the just-released film can pass through the area between the front end of the baffle 300 and the arch rib 110 and is gradually pressed between the concrete and the baffle 300. The film does not contact the edge of the front end of the baffle 300 and will not be cut by the front end of the baffle 300.

[0055] It should also be noted that when the film covering roller 400 continuously releases the film, the thickness of the film wound on the film covering roller 400 continuously decreases, the first position continuously changes, and the distance from the first position to the arch rib 110 continuously increases. In order to enable the film to smoothly enter the position between the baffle 300 and the concrete, this application sets the maximum distance from the first position to the arch rib 110 to be less than the distance from the second position to the arch rib 110. Therefore, even if the thickness of the film on the film covering roller 400 is very small, the released film can be smoothly pulled into the position between the baffle 300 and the concrete and will not be cut by the front end of the baffle 300.

[0056] Further, the film covering assembly further includes two connecting rods 410. One ends of the two connecting rods 410 are respectively rotatably connected to both ends of the film covering roller 400, and the other ends of the two connecting rods 410 are rotatably arranged at the front end of the pouring vehicle 200.

[0057] A first spring is provided between the connecting rod 410 and the pouring vehicle 200, and the first spring is used to provide a pre-tightening force that causes the connecting rod 410 to rotate in the direction of the arch rib 110 along the film covering roller 400.

[0058] Specifically, two connecting rods 410 can also be rotatably arranged at the front end of the pouring vehicle 200, and a first spring is provided to apply a pre-tightening force to the connecting rods 410, so that the film covering roller 400 can always abut against the arch rib 110. At this time, the distance from the first position to the arch rib 110 is zero, thereby ensuring that the film does not contact the front edge of the baffle 300 and avoiding the phenomenon that the edge of the baffle 300 cuts the film.

[0059] Furthermore, a guiding portion 310 is provided at the front end of the baffle 300, and the guiding portion 310 is bent gradually away from the arch rib 110 in the direction from the baffle 300 towards the film covering roller 400.

[0060] Specifically, providing a guiding portion 310 at the front end of the baffle 300 can raise the height of the front edge of the baffle 300, making the distance between the front edge of the baffle 300 and the arch rib 110 larger, thereby preventing the edge of the baffle 300 from cutting the film.

[0061] At the same time, part of the concrete accumulates under the guiding portion 310 and is gradually squeezed to the lower part of the baffle 300, thereby guiding the concrete to the lower part of the baffle 300 while achieving a greater squeezing force to ensure that the concrete can be more firmly poured on the arch frame 100.

[0062] Furthermore, the front end of the baffle 300 is fixedly connected to the pouring vehicle 200, and the rear end of the baffle 300 is elastically connected to the pouring vehicle 200.

[0063] It should be noted that since the curvatures of different positions of the arch rib 110 may not be exactly the same, if the curvature of the baffle 300 is fixed, it cannot be guaranteed that the baffle 300 always fits perfectly with the arch rib 110. This may result in the concrete surface at some positions not being leveled, or not being flush with the surface of the arch rib 110, or even the concrete leaking out between the baffle 300 and the arch rib 110.

[0064] Based on this, in this application, the front end of the baffle 300 is fixedly connected to the pouring vehicle 200, and the rear end of the baffle 300 is elastically connected to the pouring vehicle 200. When the curvature of the arch rib 110 changes, the rear end of the baffle 300 can move relative to the pouring vehicle 200 to allow the baffle 300 to undergo partial deformation until it fits with the arch rib 110, thereby enabling the concrete at each position to be tamped and leveled by the baffle 300.

[0065] Further, a first connecting portion is provided at the rear end of the baffle 300, a second connecting portion is provided at the rear end of the pouring vehicle 200, and a second spring 240 is provided between the first connecting portion and the second connecting portion. The second spring 240 is compressed or released to deform the baffle 300 to fit against the arch rib 110.

[0066] Further, the second spring 240 is arranged along the length direction of the baffle 300.

[0067] Specifically, as the pouring vehicle 200 advances and the curvature of the arch frame 100 gradually increases, the rear end of the baffle 300 can gradually compress the second spring 240, thereby reducing the distance from the front end to the rear end of the baffle 300, enabling the baffle 300 to have a greater curvature and always fit against the arch rib 110. When the curvature of the arch frame 100 gradually decreases, the second spring 240 gradually releases and drives the rear end of the baffle 300 to move in a direction away from the current front end, increasing the distance between the front and rear ends of the baffle 300, reducing the curvature of the baffle 300, and always fitting against the arch rib 110.

[0068] Further, a number of pre-tightening members are provided on the pouring vehicle 200. The pre-tightening members include a mounting frame 210 and a wheel frame 220. The mounting frame 210 is floatingly connected to the pouring vehicle 200, the wheel frame 220 is rotatably connected to the mounting frame 210, two pre-tightening wheels 230 are mounted on the wheel frame 220, and the pre-tightening wheels 230 abut against the side of the baffle 300 away from the arch rib 110.

[0069] Specifically, by providing a number of pre-tightening members, as the curvature of the arch rib 110 changes, the mounting frame 210 can float up and down relative to the pouring vehicle 200, and the wheel frame 220 can rotate relative to the mounting frame 210 to follow the change in the curvature of the arch rib 110, ensuring that the baffle 300 always fits against the arch rib 110.

[0070] Furthermore, a spring is provided between the mounting frame 210 and the pouring vehicle 200. This spring provides a pre-tightening force towards the baffle 300, enabling the pre-tightening wheels 230 to always tightly abut against the baffle 300, so that the baffle 300 can always maintain contact with the arch rib 110 and level the concrete.

[0071] The pouring vehicle 200 is provided with at least three pre-tightening wheel groups in its width direction. Each pre-tightening wheel group includes a plurality of pre-tightening wheels 230 arranged along the length direction. Among them, the two outermost pre-tightening wheel groups are respectively on the opposite sides of the two arch ribs 110, enabling the two sides of the baffle 300 to respectively tightly abut against the two arch ribs 110, so that the baffle 300 fits against the arch rib 110; the middle pre-tightening wheel group is in the middle position, applying a pre-tightening force towards the concrete direction to the middle part of the baffle 300.

[0072] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0073] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

Claims

1. A concrete pouring device for tunnel construction, which is arranged on an arch frame of the tunnel, the arch frame includes a plurality of arch ribs arranged at intervals, and the concrete pouring device is used to pour concrete into a pouring area between any two adjacent arch ribs, characterized in that: The concrete pouring device comprises: A pouring vehicle, wherein a nozzle for pouring concrete is provided in front of the pouring vehicle; A baffle plate, which is arranged at the bottom of the casting vehicle and abuts against at least two adjacent arch ribs; The coating assembly includes a coating roller, which is located between the nozzle and the baffle. A film is wound on the coating roller. The coating roller can rotate following the movement of the casting vehicle to release the film between the arch and the baffle and separate the concrete from the baffle.

2. A concrete pouring device for tunnel construction according to claim 1, characterized in that: The width of the film is greater than the width of the casting area.

3. A concrete pouring device for tunnel construction according to claim 1, characterized in that: The coating assembly further comprises two connecting rods, one end of each of the two connecting rods being rotatably connected to the two ends of the coating roller respectively, and the other ends of each of the two connecting rods being fixedly arranged at the front end of the casting vehicle; The position where the film is released from the laminating roller is defined as the first position, and the front end of the baffle is defined as the second position; the distance from the first position to the arch rib is smaller than the distance from the second position to the arch rib.

4. A concrete pouring device for tunnel construction according to claim 1, characterized in that: The coating assembly further comprises two connecting rods, one end of the two connecting rods is rotatably connected to the two ends of the coating roller respectively, and the other end of the two connecting rods is rotatably arranged at the front end of the casting vehicle.

5. A concrete pouring device for tunnel construction according to claim 4, characterized in that: A first spring is arranged between the connecting rod and the casting vehicle, and the first spring is used for providing a pre-tightening force for rotating the connecting rod along the coating roller toward the arch rib.

6. A concrete pouring device for tunnel construction according to claim 1, characterized in that: The front end of the baffle plate has a guide portion, and the guide portion is bent from the baffle plate toward the laminating roller and gradually away from the arch rib.

7. A concrete pouring device for tunnel construction according to claim 1, characterized in that: The front end of the baffle is fixedly connected to the pouring vehicle, and the rear end of the baffle is elastically connected to the pouring vehicle.

8. A concrete pouring device for tunnel construction according to claim 7, characterized in that: A first connection portion is provided at the rear end of the baffle, a second connection portion is provided at the rear end of the casting vehicle, a second spring is provided between the first connection portion and the second connection portion, and the second spring is compressed or released to deform the baffle to fit the arch rib.

9. A concrete pouring device for tunnel construction according to claim 8, characterized in that: The second spring is arranged along the length direction of the baffle.

10. A concrete pouring device for tunnel construction according to claim 1, characterized in that: The casting vehicle is provided with a plurality of pre-tightening components, and the pre-tightening components include a mounting frame and a wheel frame. The mounting frame is floatingly connected to the casting vehicle, and the wheel frame is rotatably connected to the mounting frame. Two pre-tightening wheels are installed on the wheel frame, and the pre-tightening wheels abut against a side of the baffle away from the arch rib.

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