Tunnel secondary lining vault grouting device

Abstract

The utility model discloses a tunnel secondary lining vault grouting device which comprises a movable recycling support connected with a formwork trolley, a waterproof plate is arranged on the formwork trolley, a sliding rail is arranged on the movable recycling support, and a telescopic frame capable of horizontally moving front and back is arranged on the sliding rail. The pipeline mechanism is arranged on the telescopic frame, the pipeline mechanism comprises an exhaust pipe and at least one grouting pipe, the grouting pipe and the exhaust pipe are sleeved with one-way valves, the grouting pipe and the exhaust pipe are parallel to each other and close to each other, and the front ends of the grouting pipe and the exhaust pipe extend towards the space between the waterproof plate and the primary support; the telescopic frame drives the pipeline mechanism to move front and back in the horizontal direction. The device disclosed by the utility model can avoid the quality defects of void, cavity, isolation and the like of vault concrete far away from the grouting hole caused by insufficient grouting amount due to the reduction of the flowability of the concrete, and avoids the influence on the strength and durability of the grouting due to the fact that the grouting pipe is left in the secondary lining after the grouting is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel secondary lining vault grouting device. Background Art

[0002] The secondary lining vault degassing is a common construction defect in mountain tunnels. The secondary lining of the tunnel is an arched concrete structure, and generally a steel formwork trolley is used to pour concrete on site. Since the concrete is poured from bottom to top, coupled with the sealing effect of the steel formwork, it is not easy to pour the tunnel vault densely. The causes of the lining vault degassing include insufficient pumping pressure, poor concrete fluidity, and too tight laying of waterproofing sheets. Due to the many factors involved, the lining vault degassing is very easy to occur.

[0003] In order to avoid voiding at the end of the pouring process, the density of the vault pouring needs to be dynamically monitored during the pouring of the lining concrete, and the loose parts need to be filled with grout in time. In terms of monitoring, due to the obstruction of the steel formwork during pouring, the human eye cannot see whether there is voiding and the local parts of the voiding. The more advanced method is to deploy distributed compaction sensors between the waterproof board and the initial support to monitor the compaction state of different longitudinal positions. In terms of grouting, the commonly used method is to arrange radial grouting pipes on the lining trolley at intervals along the longitudinal direction of the tunnel for grouting. This method of grouting with pre-buried grouting pipes has certain problems: first, the number of grouting pipes is limited and the position is fixed. On the one hand, it cannot cover the entire vault area, and the grouting width is insufficient; on the other hand, it cannot be radially extended into the designated void area for precise grouting. Secondly, the grouting pipe is left in the secondary lining after the grouting is completed, which affects the strength of the grouting. As the service time increases, cracks may occur on the contact surface between the lining concrete and the secondary lining, leading to the occurrence of water leakage.

[0004] Chinese patent application publication number CN 104295305A provides a process and corresponding equipment for implementing lining vault filling grouting and tunnel lining synchronously. The process steps are to first set a hollow grouting pipe where the lining vault filling grouting is required, and then carry out normal tunnel secondary lining concrete pouring construction, and then use a grouting pump to connect the grouting pipe to implement lining vault filling grouting, and finally take out the grouting pipe. Although the grouting pipe can be taken out according to the degree of solidification of the concrete, the timing of taking it out will still affect the quality of the vault grouting. If the grouting pipe is taken out quickly, the concrete has not yet initially solidified, making it difficult to ensure the fullness of the vault grouting. If the grouting pipe is taken out slowly, there will be obvious grouting defects at the grouting port, and the back water surface of the vault is pulled left and right by the upper load, which will amplify the effect of grouting defects on the cracking of the secondary lining.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The utility model aims to provide a tunnel secondary lining vault grouting device, so as to overcome the shortcomings of secondary lining grouting pipe retention, affecting grouting strength and service life of tunnel secondary lining, and inability to accurately grout.

[0007] To achieve the above-mentioned purpose, the utility model provides a tunnel secondary lining vault grouting device, comprising: a mobile recovery bracket, which is connected to a formwork trolley, the formwork trolley is provided with a waterproof board, the mobile recovery bracket is provided with a slide rail, the slide rail is provided with a telescopic frame that can move horizontally forward and backward; and a pipeline mechanism, which is arranged on the telescopic frame, the pipeline mechanism includes an exhaust pipe and at least one grouting pipe, the grouting pipe and the exhaust pipe are provided with a one-way valve, and are arranged parallel to each other, and the front end extends to the space between the waterproof board and the initial support; wherein the pipeline mechanism is driven to move horizontally forward and backward by the telescopic frame.

[0008] Preferably, in the above technical solution, there are two grouting pipes, and the two grouting pipes and the exhaust pipe are connected by a pipe connector, and the cross section forms a triangular arrangement.

[0009] Preferably, in the above technical solution, the two grouting pipes are located below the exhaust pipe.

[0010] Preferably, in the above technical solution, the one-way valve has a conical structure, the inlet diameter is larger than the outlet, the grouting pipe and the exhaust pipe enter from the inlet of the one-way valve and exit from the outlet, and the inner wall at the outlet of the one-way valve is fitted with the grouting pipe and the exhaust pipe.

[0011] Preferably, in the above technical solution, the one-way valve is formed by a plurality of elastic plates which are tilted and surrounded to form a conical structure, and the inner wall of the conical structure is coated with a rubber layer or a silicone layer.

[0012] Preferably, in the above technical solution, the telescopic frame includes: at least one driving beam, which is provided with a pulley and connected to the power mechanism, and the pulley is correspondingly arranged on the slide rail of the mobile recovery bracket; and a plurality of bearing beams, each of the bearing beams is provided with a pulley, and the pulley is correspondingly arranged on the slide rail of the mobile recovery bracket, and the plurality of bearing beams and the driving beams are arranged transversely and parallel to each other, the driving beams and the bearing beams are connected by a connecting rod assembly, and the bearing beams are connected by a connecting rod assembly; wherein, the pipeline mechanism is fixedly connected to the driving beam through a connecting piece, and is slidably connected to the bearing beam.

[0013] Preferably, in the above technical solution, the connecting rod assembly includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are arranged crosswise with each other, and the intersection is movably connected by a rotating shaft, and the two ends of the first connecting rod and the second connecting rod are respectively movably connected to the driving beam or the bearing beam.

[0014] Preferably, in the above technical solution, the power mechanism is a motor, and the motor is connected to the driving beam.

[0015] Preferably, in the above technical solution, the power mechanism is a hydraulic cylinder or a pneumatic cylinder, the hydraulic cylinder or the pneumatic cylinder is arranged on the mobile recovery bracket, and the telescopic rod is connected to the driving beam.

[0016] Preferably, in the above technical solution, compression sensors are evenly distributed between the waterproof board and the initial support.

[0017] Preferably, in the above technical solution, a movable roller is provided at the lower end of the movable recovery bracket.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The utility model of the tunnel secondary lining vault grouting device is provided with a grouting pipe connected with a telescopic frame. The grouting pipe can not only avoid the insufficient injection volume caused by the reduced fluidity of concrete from the inside to the outside, thereby causing quality defects such as hollowing, cavities, and isolation in the vault concrete far away from the grouting hole, but also avoid the grouting pipe being left in the secondary lining after the grouting is completed, affecting the strength and durability of the grouting. Since the quality defects such as hollowing, cavities, and isolation are reduced, the probability and risk of later defect remediation can be reduced, the project cost can be reduced, and the construction period can be shortened.

[0020] (2) The utility model can also recycle and reuse the grouting pipe, which is low-carbon and environmentally friendly, and has significant economic and social benefits. The utility model has a simple method of use, is easy to operate, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a tunnel secondary lining vault grouting device according to the utility model;

[0022] Figure 2 It is a structural schematic diagram of a pipeline mechanism in a tunnel secondary lining vault grouting device according to the utility model;

[0023] Figure 3 It is a structural schematic diagram of a one-way valve in a tunnel secondary lining vault grouting device according to the utility model;

[0024] Figure 4It is a schematic diagram of the internal structure of the one-way valve according to the utility model.

[0025] Description of main reference numerals:

[0026] 1-template trolley, 11-waterproof board, 12-pressure sensor; 2-mobile recovery bracket, 21-mobile roller, 22-bolt hole, 23-slide rail, 24-telescopic frame, 241-driving beam, 242-bearing beam, 243-pulley, 244-first connecting rod, 245-second connecting rod; 3-pipeline mechanism, 31-exhaust pipe, 32-grouting pipe, 33-pipeline connector, 34-one-way valve, 35-slurry stop valve. DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0028] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0029] like Figures 1 to 4 As shown, a tunnel secondary lining vault grouting device according to a specific embodiment of the utility model comprises: a template trolley 1, a mobile recovery bracket 2 and a pipeline mechanism 3. The mobile recovery bracket 2 is connected to the template trolley 1, and the pipeline mechanism 3 is telescopically arranged on the mobile recovery bracket 2. The template trolley 1 is provided with a waterproof plate 11, and the pipeline mechanism 3 extends to the space between the waterproof plate 11 and the initial support of the tunnel for grouting.

[0030] The specific structure is as follows: Four moving rollers 21 are provided at the lower part of the mobile recovery bracket 2 to facilitate the movement of the bracket. Two reserved bolt holes 22 are provided on the side close to the template trolley 1 to facilitate the connection with the template trolley 1 with bolts. A waterproof board 11 is provided on the template trolley 1, and the interval between the waterproof board 11 and the initial support of the tunnel is the area to be poured. Compressive sensors 12 are evenly distributed between the waterproof board 11 and the initial support. A slide rail 23 is provided on the mobile recovery bracket 2, and there are two slide rails 23, which are arranged parallel to each other. A telescopic frame 24 that can move horizontally forward and backward is provided on the slide rail 23. A pipeline mechanism 3 is provided on the telescopic frame 24, and the pipeline mechanism 3 is driven to move forward and backward in the horizontal direction by the telescopic frame 24. The pipeline mechanism 3 includes an exhaust pipe 31 and at least one grouting pipe 32. In this embodiment, two grouting pipes are used. The two grouting pipes 32 and the exhaust pipe 31 are arranged parallel to each other and are rigidly connected by a connector 33. The grouting pipe 32 is located below the exhaust pipe 31. The cross section of the pipeline structure formed by the connection of the pipeline connector 33 forms a triangular arrangement. Each grouting pipe 32 and exhaust pipe 31 is provided with a one-way valve 34 and a grouting stop valve 35. The front ends of the grouting pipe 32 and the exhaust pipe 31 extend to the space between the waterproof board 11 and the initial support, and grouting is performed into the space through the grouting pipe 32.

[0031] During the grouting process, the position of the vault concrete slurry continues to rise and is gradually discharged in the exhaust pipe. When the exhaust pipe begins to evenly discharge concrete and the compaction sensor reaches a predetermined value (such as 1.0MPa), the telescopic frame begins to be controlled to retract in the horizontal direction, that is, to shrink in the negative direction of the x-axis, while the concrete continues to be pumped by the two grouting pipes. Until the pipe group is completely withdrawn, the one-way valve can limit the precipitation of concrete from the grouting port of the steel segment mold.

[0032] Preferably, the one-way valve 34 is of a conical structure, and the diameter of the inlet end is larger than that of the outlet end. In the use state, the grouting pipe 32 and the exhaust pipe 31 pass through the inlet of the one-way valve 34 and pass through the outlet. The inner wall at the outlet of the one-way valve 34 is arranged to fit the outer wall of the grouting pipe 32 and the exhaust pipe 31. When the grouting pipe 32 and the exhaust pipe 31 need to be retracted during grouting, the one-way valve 34 fits the outer wall of the grouting pipe 32 and the exhaust pipe 31, which can limit the precipitation of concrete from the grouting port at the end of the steel membrane.

[0033] Preferably, the one-way valve 34 is formed of a conical structure formed by a plurality of elastic plates 341 which are tilted and enclosed. The elastic plates can make the plates fit more closely with the outer surface of the tube body when the tube body passes through the outlet end of the one-way valve. The inner wall of the conical structure is coated with a rubber layer or a silicone layer 342. The rubber layer or the silicone layer is provided to improve the sealing performance of the one-way valve and prevent the slurry from precipitating out of the one-way valve.

[0034] Preferably, the telescopic frame 24 includes at least one driving beam 241 and a plurality of bearing beams 242. In this embodiment, a driving beam 241 is provided, and pulleys 243 are provided on both sides of the driving beam 241, and are correspondingly arranged on the slide rail 23 of the mobile recovery bracket, and the driving beam 241 is located at the leftmost end. The driving beam 241 is connected to a power mechanism, and the power mechanism drives the beam 241 to perform reciprocating linear motion on the slide rail 23. Preferably, the power mechanism is a motor (not shown), and the motor is connected to the driving beam 241 to drive the driving beam 241 to move on the slide rail 23. Regarding another embodiment of the power mechanism, the power mechanism is a hydraulic cylinder or a cylinder (not shown), which is arranged on the mobile recovery bracket, and the front end of the telescopic rod of the hydraulic cylinder or the cylinder is connected to the driving beam 241, and the driving beam 241 is driven by the hydraulic cylinder or the cylinder to move on the slide rail 23.

[0035] A plurality of bearing beams 242 are located on the right side of the driving beam 241 and are arranged parallel to the driving beam 241. Pulleys (not shown) are arranged at both ends of each bearing beam 242, and the pulleys are correspondingly placed on the slide rail 23 of the mobile recovery bracket. The driving beam 241 and the bearing beam 242 are connected by a connecting rod assembly with a telescopic function. The pipeline mechanism 3 is connected to the driving beam 241 through a connecting piece 33, that is, the rear ends of the exhaust pipe 31 and the grouting pipe 32 are connected to the driving beam 241 through the connecting piece 33. The exhaust pipe 31 and the grouting pipe 32 extend to the front end to the space between the waterproof board 11 and the initial support, and the pipeline is set on the bearing beam 242 and is slidably connected to the bearing beam 242. When the driving beam 241 moves forward and backward along the slide rail 23, it drives the exhaust pipe 31 and the grouting pipe 32 to move forward and backward in the horizontal direction, and the pipe bodies of the exhaust pipe 31 and the grouting pipe 32 slide on the bearing beam 242, and the bearing beam 242 plays a supporting role.

[0036] Preferably, the connecting rod assembly includes a first connecting rod 244 and a second connecting rod 245, the first connecting rod 244 and the second connecting rod 245 are arranged crosswise with each other, and the intersection is movably connected through a rotating shaft. The two ends of the first connecting rod and the second connecting rod are movably connected to the driving beam or the bearing beam respectively.

[0037] Taking the connection between the driving crossbeam and the bearing crossbeam as an example, one end of the first connecting rod 244 is hinged to the driving crossbeam, and the other end is hinged to the bearing crossbeam. One end of the second connecting rod 245 is hinged to the driving crossbeam, and the other end is hinged to the bearing crossbeam. By analogy, the connection between the bearing crossbeams is the same. When working, the power mechanism drives the driving crossbeam to move on the slide rail, and the movement of the driving crossbeam pulls the first connecting rod and the second connecting rod, so that the crossbeams are stretched or contracted. This enables the telescopic frame to be telescopic.

[0038] The method for grouting using the tunnel secondary lining vault grouting device comprises the following steps:

[0039] (1) Before pouring the secondary lining, the formwork trolley and the mobile recovery grouting bracket are connected by bolts, and the pipeline group is placed at the front end of the tunnel in the positive direction of x through the support frame.

[0040] (2) Carry out conventional secondary lining pouring to the height of the lowest point of the pipe group, and perform vault grouting 3 hours after the secondary lining concrete pouring is completed.

[0041] (3) During the grouting process, the position of the vault concrete slurry continues to rise and is gradually discharged from the exhaust hole. When the exhaust hole begins to evenly discharge the concrete and the compaction sensor reaches a predetermined value (such as 1.0MPa), the support frame is controlled to shrink in the negative x direction, and the concrete continues to be pumped through the two grouting pipes. Until the pipe group is completely withdrawn, the one-way valve can limit the precipitation of concrete from the grouting port of the steel segment mold.

[0042] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A tunnel secondary lining vault grouting device, characterized in that: include: A mobile recovery bracket connected to the template trolley, the template trolley is provided with a waterproof plate, the mobile recovery bracket is provided with a slide rail, and the slide rail is provided with a telescopic frame capable of horizontally moving forward and backward; and A pipeline mechanism is arranged on the telescopic frame, and the pipeline mechanism includes an exhaust pipe and at least one grouting pipe. The grouting pipe and the exhaust pipe are sleeved with a one-way valve and are arranged parallel to each other, with the front end extending to the space between the waterproof board and the initial support; Wherein, the pipeline mechanism is driven to move forward and backward in the horizontal direction by the telescopic frame.

2. The tunnel secondary lining vault grouting device according to claim 1 is characterized in that: There are two grouting pipes, and the two grouting pipes and the exhaust pipe are connected by a pipe connector, and the cross section forms a triangular arrangement.

3. The tunnel secondary lining vault grouting device according to claim 2 is characterized in that: The two grouting pipes are located below the exhaust pipe.

4. The tunnel secondary lining vault grouting device according to claim 1, characterized in that: The one-way valve has a conical structure, and the inlet diameter is larger than the outlet. The grouting pipe and the exhaust pipe enter from the inlet of the one-way valve and exit from the outlet. The inner wall at the outlet of the one-way valve is fitted with the grouting pipe and the exhaust pipe.

5. The tunnel secondary lining vault grouting device according to claim 4 is characterized in that: The one-way valve is formed by a plurality of elastic plates which are tilted and surrounded to form a conical structure, and the inner wall of the conical structure is coated with a rubber layer or a silicone layer.

6. The tunnel secondary lining vault grouting device according to claim 1, characterized in that: The telescopic frame comprises: At least one driving beam, which is provided with a pulley and connected to the power mechanism, wherein the pulley is correspondingly provided on the slide rail of the mobile recovery bracket; and A plurality of bearing beams, each of which is provided with a pulley, the pulley being correspondingly arranged on the slide rail of the mobile recovery bracket, the plurality of bearing beams and the driving beam being arranged transversely and parallel to each other, the driving beam and the bearing beam being connected by a connecting rod assembly, and the bearing beams being connected by connecting rod assemblies; Wherein, the pipeline mechanism is fixedly connected to the driving crossbeam through a connecting piece, and is slidably connected to the bearing crossbeam.

7. The tunnel secondary lining vault grouting device according to claim 6, characterized in that: The connecting rod assembly includes a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are arranged to cross each other and are movably connected at the intersection through a rotating shaft. The two ends of the first connecting rod and the second connecting rod are movably connected to the driving beam or the bearing beam respectively.

8. The tunnel secondary lining vault grouting device according to claim 6, characterized in that: The power mechanism is a motor, and the motor is connected to the driving beam; Or the power mechanism is a hydraulic cylinder or a pneumatic cylinder, the hydraulic cylinder or the pneumatic cylinder is arranged on the mobile recovery bracket, and the telescopic rod is connected to the driving beam.

9. The tunnel secondary lining vault grouting device according to claim 1, characterized in that: Pressure sensors are evenly distributed between the waterproof board and the initial support.

10. The tunnel secondary lining vault grouting device according to claim 1, characterized in that: A movable roller is arranged at the lower end of the movable recovery bracket.

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