Concrete pouring device for tunnel construction

Abstract

The utility model discloses a concrete pouring device for tunnel construction, which comprises a pouring vehicle, a concrete pouring device and a concrete pouring device, 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 as to release the film to the position between the arch frame and the baffle and cover the concrete. According to the utility model, the film laminating component is arranged in front of the baffle, and the film is released through the film laminating roller, so that the film can be attached to the surface of concrete, thereby isolating the concrete from the baffle and avoiding the phenomenon that the concrete is attached to the baffle to cause the surface of the concrete to be sunken.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a concrete pouring device for tunnel construction. Background Technology

[0002] An arch frame is a type of support structure used in tunnel construction. It consists of several arch ribs that curve along the curvature of the tunnel's cross-section, with multiple arch ribs spaced apart. During construction, concrete is sprayed into the area between adjacent arch ribs to form an effective tunnel support structure.

[0003] During the shotcrete process, a vehicle is required to travel along the arch rib. The front end of the vehicle is equipped with a nozzle to pour concrete, and the bottom of the vehicle is equipped with a baffle or belt. The nozzle pours concrete at the front end, and then the concrete is smoothed by the baffle or belt to make the concrete surface flat and flush with the surface of the arch rib.

[0004] For example, the invention patent with publication number "CN117432444A" and patent name "Low Rebound Construction Method of Tunnel Support Concrete Based on Continuous Pouring of Moving Formwork" describes the following steps: S1, moving the moving formwork device to the starting pouring position of the arch frame; S2, making the limiting mechanism of the moving formwork device contact the inner arc surface of the arch frame; S3, pouring concrete between the two arch frames; S4, after the concrete strength reaches the required level, moving the moving formwork device to the next pouring position, so that the limiting mechanism contacts the inner arc surface of the arch frame.

[0005] S5. Pour concrete again between the two arch frames; S6. Move the movable formwork device to the final pouring position, and finally pour concrete between the two arch frames. In the description of the above-mentioned invention patent, the concrete poured on the arch frames is smoothed by the track plates.

[0006] However, during the pouring process, the track plates continuously rotate around the track wheels, which means that the track plates need to be detached from the concrete surface after the concrete is smoothed. Concrete tends to stick to the track plates and move with them, resulting in many depressions on the concrete surface and low construction quality.

[0007] At the same time, because the track plates have a squeezing and smoothing effect on the concrete, the force between the track plates and the concrete is relatively large, which aggravates the phenomenon of concrete adhering to the track plates and causing uneven concrete surface. Summary of the Invention

[0008] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a concrete pouring device for tunnel construction, which solves the problem of concrete adhering to the track plate during tunnel construction, resulting in depressions on the concrete surface.

[0009] The technical solution adopted by this utility model to solve its technical problem is a concrete pouring device for tunnel construction, which is installed 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 concrete pouring vehicle, with a nozzle for pouring concrete installed at the front of the vehicle;

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

[0012] A coating assembly includes a coating roller positioned between the nozzle and the baffle, the coating roller having a film wound on it, and the coating roller rotating as the pouring vehicle moves to release the film between the arch and the baffle and cover the concrete.

[0013] Furthermore, the width of the film is greater than the width of the casting area.

[0014] Furthermore, the coating assembly also includes two connecting rods, one end of each connecting rod being rotatably connected to both ends of the coating roller, and the other end of each connecting rod being fixedly disposed at the front end of the pouring vehicle;

[0015] The position where the film is released from the coating 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 less than the distance from the second position to the arch rib.

[0016] Furthermore, the coating assembly also includes two connecting rods, one end of which is rotatably connected to both ends of the coating roller, and the other end of which is rotatably disposed at the front end of the pouring vehicle.

[0017] Furthermore, a first spring is provided between the connecting rod and the pouring vehicle, the first spring being used to provide a preload force that causes the connecting rod to rotate along the coating roller toward the arch rib.

[0018] Furthermore, the front end of the baffle has a guide portion, which bends gradually away from the arch rib from the baffle toward the coating roller.

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

[0020] Furthermore, a first connecting part is provided at the rear end of the baffle, and a second connecting part is provided at the rear end of the pouring vehicle. A second spring is provided between the first connecting part and the second connecting part. The second spring is compressed or released to deform the baffle to fit against the arch rib.

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

[0022] Furthermore, the pouring vehicle is equipped with several pre-tightening components, each including a mounting frame and a wheel frame. The mounting frame is buoyantly connected to the pouring vehicle, and the wheel frame is rotatably connected to the mounting frame. Two pre-tightening wheels are mounted on the wheel frame, and the pre-tightening wheels abut against the side of the baffle 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-coating assembly is provided in front of the baffle. The film is released by the film-coating roller so that the film can adhere to the concrete surface, thereby isolating the concrete from the baffle and preventing the concrete from adhering to the baffle and causing the concrete surface to be concave.

[0025] (2) The film covering was achieved simultaneously during the pouring process, and the two processes of pouring and film covering were carried out at the same time and could be achieved by one piece of equipment, which simplified the construction process, improved the construction efficiency and reduced the construction cost.

[0026] (3) Add adhesive strips or apply adhesive to the edges on both sides of the membrane so that the two sides of the membrane can be attached to the two adjacent arch ribs respectively. When the concrete is poured to the top of the arch frame, the membrane is below the concrete and plays a supporting role in the uncured stage of the concrete, preventing the concrete from falling under its own weight and causing the concrete surface to sink.

[0027] (4) The front end of the baffle is fixed to the pouring vehicle, and the rear end of the baffle is elastically connected to the pouring vehicle. When the curvature of the arch rib changes, the rear end of the baffle can move relative to the pouring vehicle to allow the baffle to undergo partial deformation until it fits against the arch rib, so that the concrete in each position can be compacted and smoothed by the baffle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the arch frame and concrete pouring device in the embodiment;

[0029] Figure 2 This is a schematic diagram of the concrete pouring device in the embodiment;

[0030] In the picture:

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

[0032] 200. Pouring truck; 210. Mounting frame; 220. Wheel frame; 230. Preload wheel; 240. Second spring; 250. Nozzle;

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

[0034] 400. Coating roller; 410. Connecting rod. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] Please refer to Figures 1-2 This utility model discloses a concrete pouring device for tunnel construction, which is installed on the tunnel arch frame 100. The arch frame 100 includes a plurality of spaced arch ribs 110. The concrete pouring device is used to pour concrete into a pouring area 120 between any two adjacent arch ribs 110. The concrete pouring device includes:

[0037] A concrete pouring vehicle 200, with a nozzle 250 for pouring concrete installed in front of the vehicle 200;

[0038] A baffle 300 is disposed at the bottom of the pouring vehicle 200 and abuts against at least two adjacent arch ribs 110;

[0039] The coating assembly includes a coating roller 400 positioned between the nozzle 250 and the baffle 300. A film is wound on the coating roller 400. The coating roller 400 can rotate as the pouring vehicle 200 moves to release the film between the arch frame 100 and the baffle 300 and cover the concrete.

[0040] Specifically, the pouring vehicle 200 moves along the arch frame 100. During the movement, the nozzle 250 sprays concrete, the film-coating roller 400 releases the film, and at the same time, the baffle 300 presses the film onto the concrete surface and smooths the concrete, thus realizing the pouring of concrete.

[0041] This application provides a film-coating assembly in front of the baffle 300. The film is released by the film-coating roller 400 so that the film can adhere to the concrete surface, thereby isolating the concrete from the baffle 300 and preventing the concrete from adhering to the baffle 300 and causing depressions on the concrete surface.

[0042] Meanwhile, during construction, because the baffle 300 can apply pressure to the membrane, it can still smooth the concrete, but it no longer comes into direct contact with the concrete. Thus, while retaining the function of smoothing the concrete, the membrane also isolates the concrete from the baffle 300, preventing concrete from adhering to it.

[0043] It is worth mentioning that the film-coating roller 400 can synchronously release the film as the pouring vehicle 200 moves, without the need for an additional power source. Specifically, the baffle 300 can press down the film, causing the film to pull 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 also ensures that the film-coating roller 400 and the pouring vehicle 200 move in sync at all times.

[0044] It should be noted that before construction, the film needs to be pulled under the baffle 300 and the baffle 300 should press down on the film; then the concrete is poured. After the space under the baffle 300 is filled with concrete, the pouring vehicle 200 can move along the arch frame 100 and at the same time pull the film-covering roller 400 to release the film.

[0045] It is understandable that the film covering the concrete surface can lock in the moisture inside the concrete, allowing the concrete to fully solidify and harden under appropriate humidity and temperature, which helps to improve the quality and durability of the concrete.

[0046] Based on this, existing construction methods also include a process of covering the film with another film-covering curing trolley after pouring.

[0047] As can be seen, this application achieves simultaneous film covering during the pouring process, carrying out the two processes of pouring and film covering at the same time, and can be achieved by a single 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 membrane is greater than the width of the pouring area 120. In other words, the two sides of the membrane can be directly attached to the two arch ribs 110, covering the entire pouring area 120 in the width direction, which can completely prevent the concrete from contacting the baffle 300 and eliminate the phenomenon of concrete adhering to the baffle 300.

[0050] Furthermore, adhesive strips or adhesives can be added to the edges of both sides of the membrane, allowing each side of the membrane to adhere to two adjacent arch ribs 110. The advantage of this arrangement is that the membrane becomes an integral part of the arch ribs 110. When the concrete is poured to the top of the arch frame 100, the membrane is positioned below the concrete, supporting it during the pre-cured stage and preventing it from falling under its own weight and causing surface depressions.

[0051] Furthermore, the coating assembly also includes two connecting rods 410, one end of each connecting rod 410 being rotatably connected to both ends of the coating roller 400, and the other end of each connecting rod 410 being fixedly disposed at the front end of the pouring vehicle 200;

[0052] The position where the film is released from the coating roller 400 is defined as the first position, and the front end of the baffle 300 is defined 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 coating roller 400 just begins to separate from the coating roller 400, such as... Figure 2 As shown, the first position is located at the bottom of the entire coating 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 newly released membrane can pass through the area between the front end of the baffle 300 and the arch rib 110 and be gradually pressed between the concrete and the baffle 300. The membrane does not contact the edge of the front end of the baffle 300 and will not be torn by the front end of the baffle 300.

[0055] It should also be noted that as the coating roller 400 continuously releases the film, the thickness of the film wound on the coating 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 ensure that the film smoothly enters 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 smaller than the distance from the second position to the arch rib 110. Therefore, even if the film thickness on the coating roller 400 is very small, the released film can still be smoothly pulled into the space between the baffle 300 and the concrete without being torn by the front end of the baffle 300.

[0056] Furthermore, the coating assembly also includes two connecting rods 410, one end of which is rotatably connected to both ends of the coating roller 400, and the other end of which is rotatably disposed 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. The first spring is used to provide a preload force to cause the connecting rod 410 to rotate along the coating roller 400 toward the arch rib 110.

[0058] Specifically, two connecting rods 410 can be rotatably set at the front end of the pouring vehicle 200, and a first spring can be set to apply a pre-tightening force to the connecting rods 410 so that the film coating 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 will not contact the front edge of the baffle 300 and avoiding the phenomenon of the baffle 300 edge tearing the film.

[0059] Furthermore, the front end of the baffle 300 has a guide portion 310, which bends gradually away from the arch rib 110 from the baffle 300 toward the coating roller 400.

[0060] Specifically, a guide part 310 is provided at the front end of the baffle 300, which 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 tearing the film.

[0061] At the same time, some concrete gathers below the guide section 310 and is gradually squeezed to the bottom of the baffle 300, thereby guiding the concrete to the bottom of the baffle 300 and achieving greater extrusion pressure, ensuring that the concrete can be poured more compactly onto 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 curvature of the arch rib 110 is not necessarily the same at different positions, if the curvature of the baffle 300 is fixed, it cannot be guaranteed that the baffle 300 will always be completely in contact with the arch rib 110. This results in some concrete surfaces that cannot be smoothed or cannot be flush with the surface of the arch rib 110, or even concrete leaking out between the baffle 300 and the arch rib 110.

[0064] Based on this, 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 against the arch rib 110, so that the concrete at each position can be compacted and smoothed by the baffle 300.

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

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

[0067] Specifically, as the pouring vehicle 200 moves forward 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 between the front end and the rear end of the baffle 300, allowing the baffle 300 to have a greater curvature and always remain in contact with 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 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 remaining in contact with the arch rib 110.

[0068] Furthermore, the pouring vehicle 200 is provided with a number of pre-tightening components, including a mounting frame 210 and a wheel frame 220. The mounting frame 210 is buoyantly connected to the pouring vehicle 200, and the wheel frame 220 is rotatably connected to the mounting frame 210. Two pre-tightening wheels 230 are installed 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, several pre-tightening components are set up so that 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 curvature change of the arch rib 110, ensuring that the baffle 300 is always in contact with the arch rib 110.

[0070] Furthermore, a spring is provided between the mounting frame 210 and the pouring vehicle 200. This spring provides a preload force toward the baffle 300, so that the preload wheel 230 can always press against the baffle 300, and the baffle 300 can always maintain contact with the arch rib 110 and smooth the concrete.

[0071] The pouring vehicle 200 is equipped with at least three pre-tensioning wheel sets in its width direction, and each pre-tensioning wheel set includes multiple pre-tensioning wheels 230 arranged in the length direction. Among them, the two outermost pre-tensioning wheel sets are located on opposite sides of the two arch ribs 110, so that the two sides of the baffle 300 can be tightly pressed against the two arch ribs 110, making the baffle 300 fit with the arch ribs 110; the middle pre-tensioning wheel set is located in the middle position, applying a pre-tensioning force towards the concrete direction to the middle part of the baffle 300.

[0072] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0073] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A concrete placing device for tunnel construction, which is provided on a tunnel arch frame, the arch frame comprising a plurality of arch ribs arranged at intervals, the concrete placing device being used to place concrete to a placing area between any two adjacent arch ribs, characterized in that, The concrete pouring device comprises: a pouring vehicle provided with a nozzle in front of the pouring vehicle for pouring concrete; a baffle provided at the bottom of the pouring vehicle and abutting against at least two adjacent arch ribs; a film covering assembly comprising a film covering roller between the nozzle and the baffle, a film being wound on the film covering roller, the film covering roller being rotatable to release the film between the arch frame and the baffle and cover the concrete as the pouring vehicle moves.

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

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

4. The concrete pouring device for tunnel construction according to claim 1, characterized in that, The film covering assembly further comprises two connecting rods, one end of each of the two connecting rods being rotatably connected to two ends of the film covering roller, and the other end of each of the two connecting rods being rotatably arranged at the front end of the pouring vehicle.

5. The concrete placing device for tunnel construction according to claim 4, wherein A first spring is arranged between the connecting rod and the pouring vehicle, and the first spring provides a pre-tightening force for rotating the connecting rod along the film covering roller towards the arch rib.

6. The concrete placing device for tunnel construction of claim 1, wherein, The front end of the baffle has a guide portion which is gradually bent away from the arch rib in a direction towards the film covering roller.

7. The concrete placing device for tunnel construction of claim 1, wherein, The front end of the baffle is fixed to the pouring vehicle, and the rear end of the baffle is elastically connected to the pouring vehicle.

8. The concrete placing device for tunnel construction according to claim 7, characterized in that, The rear end of the baffle is provided with a first connecting portion, the rear end of the pouring vehicle is provided with a second connecting portion, and a second spring is arranged between the first connecting portion and the second connecting portion, the second spring being compressed or released to deform the baffle to fit the arch rib.

9. The concrete placing device for tunnel construction according to claim 8, wherein The second spring is arranged along the length direction of the baffle.

10. The concrete placing device for tunnel construction of claim 1, wherein, The pouring vehicle is provided with a plurality of pre-tightening members, each pre-tightening member comprising a mounting frame and a wheel frame, the mounting frame being floatably connected to the pouring vehicle, the wheel frame being rotatably connected to the mounting frame, two pre-tightening wheels being mounted on the wheel frame, and the pre-tightening wheels abutting against one side of the baffle away from the arch rib.

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