Material conveying device for tunnel lining pouring

Abstract

The utility model provides a material conveying device for tunnel lining pouring. The material conveying device comprises a moving trolley, a vertical feeding pipe and at least two layers of material conveying pipes arranged on the vertical feeding pipe, each layer of material conveying pipe comprises two symmetrically-arranged material conveying pipelines, the bottom end of the vertical feeding pipe is fixed to the moving trolley, the bottom face of the vertical feeding pipe is a sealed end face, and a feeding horn opening is formed in the top of the vertical feeding pipe. A plurality of material injection openings are correspondingly formed in the inner wall of the tunnel steel lining, the inner diameter of each main material opening is matched with the outer diameter of each material conveying pipe, one end of each material conveying pipe is communicated with the vertical feeding pipe, and the other end of each material conveying pipe extends to the corresponding main material opening in the inner wall of the tunnel steel lining and is communicated with the corresponding material injection opening in a sealed mode. The tunnel secondary lining concrete pouring time is effectively shortened, and the working efficiency is improved; according to the tunnel lining concrete pouring device, layered and staged concrete pouring can be conducted on a tunnel, the segregation phenomenon is avoided, the concrete compactness is enhanced, the tunnel lining concrete quality is improved, and the overall tunnel safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel engineering, and specifically refers to a material conveying device used for pouring tunnel lining, which can be well used for pouring concrete for tunnel lining. Background Art

[0002] With the continuous progress and development of society, tunnel projects have higher and higher requirements for lining concrete pouring. Under the strict control of economic benefits, construction space restrictions and high construction quality requirements, higher quality, better integrity and higher speed requirements are put forward for tunnel lining concrete pouring construction. At present, most tunnel lining concrete pouring construction is to reserve an upper feed port for concrete pouring after the support formwork is erected, and then the concrete of the tunnel masonry layer is poured through the feed port; since all concrete pouring is carried out through the pouring port, its pouring efficiency is relatively low, the construction investment is large, and it cannot meet the construction period of the tunnel project well, resulting in delays in the construction period; and since the pouring port is opened at the top of the formwork, during the pouring process, the concrete is poured from the top to the bottom, and the drop height difference exceeds 2m, which can easily lead to disintegration, and the quality of concrete pouring cannot be guaranteed, resulting in a decrease in concrete density, greatly reducing its integrity, and having an adverse impact on the safety of tunnel projects. Summary of the invention

[0003] The purpose of the utility model is to overcome the problems of the prior art and provide a material conveying device for tunnel lining casting, which can effectively shorten the construction cycle of the tunnel secondary lining concrete, reduce labor costs, improve construction efficiency, and achieve the effect of shortening the construction period of the tunnel project, and can avoid waste, can greatly avoid cracks in concrete casting, enhance concrete density, and ensure the integrity of the tunnel body.

[0004] In order to achieve the above technical objectives, the utility model provides a material conveying device for tunnel lining casting, the material conveying device comprises a moving trolley, a vertical feeding pipe, and at least two layers of feeding pipes arranged on the vertical feeding pipe, each layer of feeding pipe comprises two symmetrically arranged feeding pipelines, the bottom end of the vertical feeding pipe is fixed on the moving trolley, and the bottom surface is a sealed end surface, and the top is provided with a feeding bell mouth; a plurality of injection ports are correspondingly opened on the inner wall of the tunnel steel lining, and the inner diameter of the injection port matches the outer diameter of the feeding pipe, one end of each feeding pipe is connected with the vertical feeding pipe, and the other end extends to the corresponding injection port on the inner wall of the tunnel steel lining, and is sealed and connected with the corresponding injection port; the distance between the uppermost feeding pipe and the top of the tunnel steel lining is not more than 1.5m, and the height of the lowermost feeding pipe from the bottom surface of the tunnel and the spacing between two adjacent layers of feeding pipes are not more than 2m.

[0005] The preferred technical solution of the utility model is as follows: the vertical feed pipe and the multiple feed pipes are an integrally welded and interconnected pipeline structure, and each feed pipe is inclined downward from the connecting end of the vertical feed pipe toward the connecting end of the tunnel steel lining.

[0006] A further technical solution of the utility model is as follows: the material conveying device also includes a concrete pump and a concrete conveying pipe for use in conjunction with each other, one end of the concrete conveying pipe is connected to the other end of the concrete pump, and the other end extends through a bracket to a feed bell mouth at the top end of the vertical feed pipe, the discharge end of the concrete conveying pipe is butt-jointed with the feed bell mouth, and concrete is conveyed toward the vertical feed pipe through the concrete pump and the concrete conveying pipe.

[0007] The better technical solution of the utility model is as follows: the diameter of the lower opening of the feeding bell mouth is consistent with the diameter of the vertical feeding pipe, and the diameter of the upper opening is at least 50 cm greater than the diameter of the lower opening.

[0008] A more optimal technical solution of the utility model: the distance between the feed bell mouth and the steel lining of the tunnel is greater than 0.8m.

[0009] The preferred technical solution of the utility model is as follows: the height of the lowest layer of the material conveying pipe from the bottom surface of the tunnel is 1.2-2m, and the distance between two adjacent layers of the material conveying pipe is 0.8-1.5m.

[0010] A better technical solution of the utility model is as follows: the movable trolley is a self-driven flatbed trolley, and the bottom end of the vertical feeding pipe is welded to the top plate of the movable trolley.

[0011] The preferred technical solution of the utility model is that each feeding pipe has a downward inclination angle of 20 to 40 degrees.

[0012] The beneficial effects of the utility model are:

[0013] (1) The utility model uses vertical pipes and branch pipes of different heights to pour concrete in layers and stages from bottom to top, thereby reducing the height difference of concrete pouring and ensuring that the sprayed concrete can be poured on the inner wall of the tunnel to avoid waste. It can greatly avoid cracks in concrete pouring, enhance the density of concrete, ensure the integrity of the tunnel body, improve the quality of tunnel lining concrete, ensure the overall safety of the tunnel, and effectively shorten the construction cycle of the tunnel secondary lining concrete.

[0014] (2) The traveling vehicle, vertical conveying pipe, vertical feeding pipe and feeding bell mouth in the utility model are welded together to ensure the overall rigidity of the device. The device adopts the concept of one-time design, one-time production and one-time installation, and the length of the vertical conveying pipe and the vertical feeding pipe is customized according to the diameter of the tunnel, which can adapt to tunnels and tunnel projects of any size; the overall installation and construction is simple, and the pipeline can be moved and transported by a trolley, which saves construction time, reduces labor costs, improves construction efficiency, and achieves the effect of shortening the construction period of the tunnel project.

[0015] (3) After the vertical conveying pipe, vertical feeding pipe and feeding bell mouth of the utility model are connected to the traveling vehicle, the vertical conveying pipe is in close contact with the tunnel steel lining, which greatly increases the sealing between the vertical conveying pipe and the tunnel steel lining, ensuring that the sprayed concrete can be poured on the inner wall of the tunnel to avoid waste; the spacing between the feeding bell mouth and the tunnel steel lining is greater than 100 cm, which ensures the vertical space during the material transportation process and facilitates the smooth entry of concrete into the vertical feeding pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the material transfer structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the construction status of the utility model.

[0018] Among them: 1-mobile trolley, 2-feeding pipe, 3-vertical feeding pipe, 4-feeding bell mouth, 5-concrete conveying pipeline, 6-concrete pump, 7-tunnel steel lining, 8-tunnel inner wall, 9-ground. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Figure 1 to Figure 2 The drawings are all of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the utility model. The following technical solutions shown in the drawings are specific solutions of the embodiments of the utility model and are not intended to limit the scope of the utility model to be protected. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0021] The embodiment provides a material conveying device for tunnel lining casting, such as Figure 1 and Figure 2 As shown, the material conveying device includes a mobile trolley 1, a vertical feeding pipe 3, and at least two layers of feeding pipes 2 arranged on the vertical feeding pipe 3. Each layer of feeding pipe 2 includes two symmetrically arranged feeding pipes. The vertical feeding pipe 3 and the multiple feeding pipes 2 are an integrally welded and interconnected pipeline structure. Each feeding pipe 2 is tilted downward from the connecting end of the vertical feeding pipe 3 toward the connecting end of the tunnel steel lining 7. The downward tilt angle of each feeding pipe 2 is controlled at 20 to 40 degrees. The mobile trolley 1 is a self-driven flatbed trolley, which can be driven by itself or a manually pushed flatbed trolley. A trolley mechanism is provided on the mobile wheel. After the mobile trolley moves into position, it can be braked and positioned. The bottom end of the vertical feeding pipe 3 is welded to the top plate of the mobile trolley 1, and the bottom surface is a sealing end surface. A feeding bell mouth 4 is provided on the top. The lower diameter of the feeding bell mouth 4 is consistent with the diameter of the vertical feeding pipe 3, and the upper diameter is at least 50 cm larger than the lower diameter. The distance between the topmost material delivery pipe 2 and the top of the tunnel steel lining 7 is no more than 1.5m, preferably 1.2-1.5m, and the spacing between the feed bell mouth 4 and the tunnel steel lining 7 is greater than 0.8m, preferably 1-1.2m. The height of the bottommost material delivery pipe 2 from the bottom of the tunnel is 1.2-2m, and the spacing between two adjacent layers of material delivery pipes 2 is 0.8-1.5m. The spacing can avoid segregation during concrete pouring and will not affect the concrete pouring process.

[0022] The embodiment provides a material conveying device for tunnel lining casting, such as Figure 1 and Figure 2 As shown, a plurality of injection ports are correspondingly provided on the inner wall of the tunnel steel lining 7, and the inner diameter of the injection port matches the outer diameter of the feed pipe 2. One end of each feed pipe 2 is connected to the vertical feed pipe 3, and the other end extends to the corresponding injection port on the inner wall of the tunnel steel lining 7 and is sealed and connected to the corresponding injection port. Figure 2As shown, the conveying device also includes a concrete pump 6 and a concrete delivery pipe 5 for use together. The concrete pump 6 is placed on the ground and communicated with a concrete pump truck or other concrete storage equipment. One end of the concrete delivery pipe 5 is connected to the other end of the concrete pump 6, and the other end extends to the feed bell mouth 4 at the top of the vertical feed pipe 3 through a bracket. The discharge end of the concrete delivery pipe 5 is sealed and connected to the feed bell mouth 4, and concrete is delivered to the vertical feed pipe 3 through the concrete pump 6 and the concrete delivery pipe 5.

[0023] The feed pipe 2 and the vertical feed pipe 3 of the utility model are both cylindrical, and the length of the feed pipe 2 and the vertical feed pipe 3 is customized according to the diameter of the tunnel, which can adapt to tunnels and tunnel projects of any size. After the feed pipe 2, the vertical feed pipe 3 and the feed bell mouth 4 are connected to the traveling vehicle, the feed pipe 2 and the tunnel steel lining 7 are in close contact, which greatly increases the sealing between the feed pipe 2 and the tunnel steel lining 7, ensuring that the sprayed concrete can be poured on the inner wall of the tunnel to avoid waste; the spacing between the feed bell mouth 4 and the tunnel steel lining 7 is greater than 0.8m, which ensures the vertical space during the material transportation process, and facilitates the smooth entry of concrete into the vertical feed pipe 3. The multi-layer vertical feed pipe 2 can realize layered and staged pouring, which can greatly avoid cracks in concrete pouring, enhance the density of concrete, and ensure the integrity of the tunnel body.

[0024] When the utility model is used for concrete pouring, the concrete is delivered by the concrete pump 6 through the concrete delivery pipe 5 to the feed bell mouth 4 and enters the vertical delivery pipe 3. The concrete flows downward through the vertical delivery pipe 3 and sequentially flows into the delivery pipes 2 on both sides. The concrete is first delivered through the lowest delivery pipe 2 to pour the concrete of the lower layer of the tunnel. After the pouring of the lower layer is completed, the concrete gradually rises along the vertical delivery pipe 3 to the second layer delivery pipe 2, and then continues to pour through the second layer delivery 2. The concrete pump continuously supplies concrete and repeats the above process to achieve the tunnel lining pouring and material transfer until the pouring is completed. The tunnel concrete lining is poured in layers through the multi-layer delivery pipe 2, and the pouring height of each layer does not exceed 2m, and segregation will not occur due to the large drop.

[0025] The utility model effectively shortens the construction cycle of the second lining concrete of the tunnel, reduces labor costs, improves construction efficiency, and shortens the construction period of the tunnel project. In addition, the four vertical feed pipes on both sides are poured in layers and stages to ensure that the sprayed concrete can be poured on the inner wall of the tunnel to avoid waste. It can greatly avoid cracks in concrete pouring, strengthen the density of concrete, ensure the integrity of the tunnel body, improve the quality of tunnel lining concrete, and ensure the overall safety of the tunnel. It effectively solves the problems of large manpower investment in construction, low efficiency, inability to meet the construction period of the tunnel project, resulting in delays in the construction period; the quality of concrete pouring cannot be guaranteed, resulting in reduced density of concrete, greatly reducing its integrity, and having an adverse impact on the safety of the tunnel project.

[0026] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A material conveying device for tunnel lining casting, characterized in that: The material conveying device comprises a movable trolley (1), a vertical material feeding pipe (3), and at least two layers of material feeding pipes (2) arranged on the vertical material feeding pipe (3), each layer of material feeding pipes (2) comprising two symmetrically arranged material feeding pipelines, the bottom end of the vertical material feeding pipe (3) is fixed on the movable trolley (1), and the bottom surface is a sealed end surface, and the top is provided with a feeding bell mouth (4); a plurality of injection ports are correspondingly opened on the inner wall of the tunnel steel lining (7), and the inner diameter of the injection port matches the outer diameter of the material feeding pipe (2); one end of each material feeding pipe (2) is connected to the vertical material feeding pipe (3), and the other end extends to the corresponding injection port on the inner wall of the tunnel steel lining (7) and is sealed and connected to the corresponding injection port; the distance between the uppermost layer of material feeding pipe (2) and the top of the tunnel steel lining (7) is not more than 1.5 m, and the height of the lowermost layer of material feeding pipe (2) from the tunnel bottom surface and the spacing between two adjacent layers of material feeding pipes (2) are not more than 2 m.

2. A material conveying device for tunnel lining casting according to claim 1, characterized in that: The vertical feed pipe (3) and the plurality of conveying pipes (2) are an integrally welded and interconnected pipeline structure, and each conveying pipe (2) is inclined downward from the connection end of the vertical feed pipe (3) toward the connection end of the tunnel steel lining (7).

3. A material conveying device for tunnel lining casting according to claim 1 or 2, characterized in that: The material conveying device also includes a concrete pump (6) and a concrete conveying pipe (5) used in conjunction with each other. One end of the concrete conveying pipe (5) is connected to the other end of the concrete pump (6), and the other end extends through a bracket to a feed bell mouth (4) at the top end of the vertical feed pipe (3). The discharge end of the concrete conveying pipe (5) is connected to the feed bell mouth (4), and concrete is conveyed toward the vertical feed pipe (3) through the concrete pump (6) and the concrete conveying pipe (5).

4. A material conveying device for tunnel lining casting according to claim 1 or 2, characterized in that: The diameter of the lower opening of the feeding bell mouth (4) is consistent with the diameter of the vertical feeding pipe (3), and the diameter of the upper opening is at least 50 cm greater than the diameter of the lower opening.

5. A material conveying device for tunnel lining casting according to claim 1 or 2, characterized in that: The distance between the feed bell mouth (4) and the tunnel steel lining (7) is greater than 0.8 m.

6. A material conveying device for tunnel lining casting according to claim 1 or 2, characterized in that: The height of the lowest layer of material conveying pipes (2) from the bottom surface of the tunnel is 1.2 to 2 m, and the distance between two adjacent layers of material conveying pipes (2) is 0.8 to 1.5 m.

7. A material conveying device for tunnel lining casting according to claim 1 or 2, characterized in that: The mobile trolley (1) is a self-driven flatbed trolley, and the bottom end of the vertical feeding pipe (3) is welded to the top plate of the mobile trolley (1).

8. The material conveying device for tunnel lining casting according to claim 2 is characterized in that: The downward inclination angle of each material conveying pipe (2) is 20 to 40 degrees.

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