Longitudinal pouring process for tunnel secondary lining

Abstract

The invention provides a tunnel secondary lining longitudinal pouring process, and relates to the technical field of tunnel construction. The pouring process comprises the steps that S01, a secondary lining formwork trolley walks to a preset position; s02, a longitudinal pouring trolley and a concrete pump truck are adjusted to preset positions; s03, a trolley on the top of the longitudinal pouring trolley drives a gun barrel communicated with the concrete pump truck to move; s04, the concrete pump truck is started to complete pouring of the side wall; s05, a transom window of the secondary lining formwork trolley is closed, and pouring is conducted on the vault; s06, a gun barrel, communicated with the concrete pump truck and the conveying pipeline, of the concrete pump truck is cleaned; s07, the moving trolley of the longitudinal pouring trolley descends, and an operator binds reinforcing steel bars needed by the next tunnel formwork; and S08, the process from the step S01 to the step S07 is repeated. The passing route of the gun barrel is placed at the top of the longitudinal pouring trolley, so that the problem of long occupied safe distance is solved, and the labor intensity of workers is reduced by adopting one gun barrel for pouring.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel secondary lining longitudinal pouring process. Background Art

[0002] At present, the secondary lining trolley is mostly used for the secondary construction of tunnels, and the secondary lining is poured layer by layer in a window-by-window manner and vertically topped. In the traditional construction process, concrete is injected into the vertical pouring holes at the top one by one, and the secondary lining space is filled by gravity. Limited by the spacing and height of the pouring points, the concrete is limited by gravity and the slump of the concrete itself, which inevitably makes it difficult for the concrete to overcome the difficulties of gravity and insufficient flow dispersion during pouring, forming a conical accumulation with a slump radius around the pouring point, and forming an area far away from the pouring port where concrete cannot be dispersed and covered. A triangular space that cannot be poured and filled will be formed at the connection of the accumulation body. This is the formation principle of the tunnel lining pouring void and insufficient thickness of the tunnel secondary lining in the current tunnel construction.

[0003] Based on the above problems, patent CN201920873294.7 proposed a longitudinal continuous perfusion process. The longitudinal continuous perfusion processes currently implemented are some improvements on this patent. However, the current longitudinal continuous perfusion processes have the following problems:

[0004] 1. At present, the secondary lining of the tunnel is poured longitudinally and continuously, the side wall is poured using the secondary lining formwork trolley, and the vault is poured using the longitudinal pouring trolley, which requires two sets of pouring systems.

[0005] 2. The longitudinal pouring equipment or construction occupies a large safety space; during the pouring process, the trolley and the pump truck do not move, but the trolley is long (longer occupies a safe distance), and the pouring trolley moves on the trolley. The trolley can move alone to drive the longitudinal gun barrel to move back and forth and insert it into the second lining formwork trolley to a sufficient depth.

[0006] During the pouring process, the trolley needs to move, but the trolley is short (the length of the trolley itself). The longitudinal gun barrel cannot be inserted into the second lining formwork trolley to a sufficient depth if it is driven by the trolley alone. Therefore, the trolley needs to move part of the gun barrel to drive the gun barrel to move forward and backward to ensure the forward and backward insertion depth. During the pouring process, the pump truck does not move. Since the trolley moves, a horizontal folding pump pipe is set between the trolley and the pump truck. The folding pump pipe is prone to blockage during use. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a tunnel secondary lining longitudinal pouring process, by placing the travel route of the gun barrel on the top of the longitudinal pouring trolley, and opening a top window on the top of the secondary lining template trolley, so as to solve the problem that the current longitudinal pouring construction process of the secondary lining pouring requires two sets of pouring systems and occupies a long safety distance.

[0008] The technical solution adopted by the present invention is:

[0009] A tunnel secondary lining longitudinal pouring process, comprising:

[0010] S01. The secondary lining formwork trolley moves to the predetermined position and is positioned and reinforced;

[0011] S02. The longitudinal pouring trolley and concrete pump truck are adjusted to the predetermined positions;

[0012] S03. The trolley on the top of the longitudinal pouring trolley drives the gun barrel connected to the concrete pump truck to move to the top window of the secondary lining formwork trolley;

[0013] S04, start the concrete pump truck, and complete the pouring of the side wall through the material distribution assembly set on the secondary lining formwork trolley, and pour from low to high in sequence until the side wall is poured;

[0014] S05. After the side wall is poured, close the top window of the secondary lining formwork trolley to pour the vault. First, move the gun barrel to one end of the opening or close to the end of the secondary lining where the previous plate has been poured, and then start the concrete pump truck to pour. During the pouring process, the gun barrel is retracted according to the delivery pressure of the concrete pump truck and the trolley of the longitudinal pouring trolley until the vault is poured.

[0015] S06. Cleaning the delivery pipeline of the concrete pump truck and the gun barrel connected to the delivery pipeline;

[0016] S07. The trolley arranged on the top of the longitudinal pouring trolley descends, and the movable platform arranged on the top of the longitudinal pouring trolley extends to form an operating platform, on which the operator ties the steel bars required for the next plate;

[0017] S08, repeat the process of step S01 to step S07 until the second lining casting in the entire tunnel is completed

[0018] Optionally, the second lining formwork on the second lining formwork trolley in step S01 includes: two side formworks for pouring the tunnel side walls and a top formwork arranged on the top of the two side formworks, the side formworks are provided with multiple rows of pouring windows along their height direction, the outlet of the material distribution assembly is arranged corresponding to the pouring windows; and a top window is arranged on the top of the top formwork.

[0019] Optionally, the material distribution assembly in step S04 includes: a main hopper corresponding to the top window and a distribution hopper arranged along the height direction of the tunnel, the main hopper and the distribution hopper are connected through a first shuttle groove, and the distribution hopper is connected to the casting window through a second shuttle groove;

[0020] Wherein, the number of the distribution hoppers matches the number of rows of the casting windows.

[0021] Optionally, the specific structure of the longitudinal pouring trolley in step S02 includes:

[0022] A frame that can be raised and lowered, with movable wheels provided at the bottom of the frame;

[0023] A mobile trolley is slidably arranged on the top of the frame;

[0024] The top of the second lining template trolley can move closer to or farther away from the second lining template trolley;

[0025] a gun barrel bracket, arranged on a side of the mobile trolley away from the second lining template trolley;

[0026] Two fixing frames are arranged at both ends of the mobile trolley;

[0027] A mobile frame is arranged on the top of the mobile vehicle;

[0028] A driving member, used for driving the moving frame to move on the gun barrel bracket;

[0029] Wherein, the gun barrel is arranged on the two fixed frames and the movable frame, and the fixed frames and the movable frame drive the gun barrel to move along the width direction of the frame.

[0030] Optionally, the mobile vehicle comprises:

[0031] A liftable base, the bottom of which is slidably connected to the top of the frame;

[0032] A mounting plate, one end of which is away from the secondary lining formwork trolley, is hinged to the base, the barrel bracket is mounted on the end of the mounting plate away from the secondary lining formwork trolley, and the fixing frame is slidably mounted on the top of the mounting plate so that the fixing frame can slide along the width direction of the fixing frame;

[0033] An angle driving mechanism has one end hinged to one end of the base close to the second lining template trolley, and the other end hinged to the mounting plate.

[0034] Optionally, the delivery pipeline comprises:

[0035] A first pipeline, one end of which is connected to the discharge port of the concrete pump truck, and the other end of which is connected to the top of the frame;

[0036] A second pipe, one end of which is rotatably connected to one end of the first pipe disposed on the top of the frame through a joint;

[0037] A third pipe, one end of which is rotatably connected to the other end of the second pipe through a joint;

[0038] A connecting joint has one end rotatably connected to the other end of the third pipe, and the other end connected to the gun barrel.

[0039] Optionally, the driving member is a telescopic member, a fixed end of which is mounted on the two fixing frames, and a movable end of the driving member is connected to the gun barrel via a connecting plate.

[0040] Optionally, a sliding plate and a sliding drive mechanism are provided on the top of the fixed frame, the extension direction of the sliding drive mechanism is perpendicular to the moving direction of the moving vehicle, and the moving end of the sliding drive mechanism is connected to the sliding plate; a clamping assembly is provided on the top of the sliding plate.

[0041] Optionally, slide grooves are provided on the two side walls of the barrel bracket along its movement direction, and a pulley is provided on the movable frame, and the pulley is arranged in the slide grooves.

[0042] Optionally, the movable frame includes: two positioning plates, a connecting column arranged between the two positioning plates, and a mounting frame, the pulleys are arranged on both positioning plates, and the mounting frame is installed on the connecting column and can move along the axial direction of the connecting column.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1. The problem of long safety distance is solved by placing the barrel's travel route on the top of the longitudinal pouring trolley.

[0045] 2. A top window is opened on the top of the secondary lining formwork trolley to solve the problem that the current longitudinal pouring construction process for the secondary lining pouring requires two sets of pouring systems.

[0046] 3. Use one gun barrel for pouring, reduce the cleaning steps of the pipeline, reduce the labor intensity of workers, reduce the frequency of operation, and improve the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 This is a schematic diagram of the equipment layout structure for the tunnel secondary lining longitudinal pouring process.

[0049] Figure 2 It is a schematic diagram of the overall structure of the secondary lining formwork trolley.

[0050] Figure 3It is a schematic diagram of the plan structure of the secondary lining formwork trolley.

[0051] Figure 4 This is a schematic diagram of the three-dimensional structure of the longitudinal pouring trolley.

[0052] Figure 5 for Figure 4 Schematic diagram of the local structure at point A in the middle.

[0053] Figure 6 for Figure 4 Schematic diagram of the local structure at point B.

[0054] Figure 7 This is a schematic diagram of the left view of the longitudinal pouring trolley.

[0055] Figure 8 It is a schematic diagram of the structure in which the gun barrel is fully extended on the top of the longitudinal injection trolley.

[0056] Fig. 9 It is a schematic diagram of the structure of the gun barrel in the state of being completely retracted on the top of the longitudinal injection trolley.

[0057] Fig.10 A schematic diagram of the structure of the lifting display rack unfolding to form an operating platform.

[0058] Fig.11 Schematic diagram of the partial structure of the longitudinal pouring trolley.

[0059] Reference numerals:

[0060] 1. Second lining formwork trolley; 11. Top window; 12. Side formwork; 13. Top formwork; 14. Casting window;

[0061] 2. Longitudinal pouring trolley; 21. Carriage frame; 22. Mobile trolley; 221. Base; 222. Mounting plate; 223. Angle driving mechanism; 23. Gun barrel bracket; 231. Slideway; 24. Fixed frame; 241. Sliding plate; 242. Sliding driving mechanism; 243. Clamping assembly; 244. Mounting plate; 245. Clamping cylinder; 246. Roller; 25. Mobile frame; 251. Pulley; 252. Positioning plate; 253. Connecting column; 254. Mounting frame; 26. Driving member; 27. Operating platform; 28. Connecting plate;

[0062] 3. Concrete pump truck;

[0063] 4. Gun barrel;

[0064] 5. material distribution assembly; 51. main hopper; 52. material distribution hopper; 53. first shuttle slot; 54. second shuttle slot;

[0065] 6. Delivery pipeline; 61. First pipeline; 62. Second pipeline; 63. Third pipeline; 64. Connecting joint. DETAILED DESCRIPTION

[0066] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0071] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0072] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0073] like Figure 1 , Figure 2 , Figure 3 , Figure 8 , Fig. 9 and Fig.10 As shown, an embodiment of the present invention provides a tunnel secondary lining longitudinal pouring process, comprising:

[0074] S01. The secondary lining formwork trolley 1 moves to a predetermined position and is positioned and reinforced; at this time, the secondary lining formwork trolley 1 is unfolded, so that the side formwork 12 and the top formwork 13 installed on the secondary lining formwork trolley 1 are adapted to the primary lining of the tunnel, and a casting cavity is formed.

[0075] In order to facilitate the pouring of the secondary lining of the tunnel through a pouring pipe during the pouring process, the secondary lining formwork on the secondary lining formwork trolley 1 includes: two side formworks 12 for pouring the tunnel side walls and a top formwork 13 arranged on the top of the two side formworks 12, the side formworks 12 are provided with multiple rows of pouring windows 14 along the height direction thereof, and the outlet of the material distribution assembly 5 is arranged corresponding to the pouring windows 14; the top of the top formwork 13 is provided with a top window 11.

[0076] S02. The longitudinal pouring trolley 2 and the concrete pump truck 3 are adjusted to a predetermined position, and fixed after reaching the predetermined position to avoid movement during the pouring process.

[0077] S03, the trolley on the top of the longitudinal pouring trolley 2 drives the gun barrel 4 connected to the concrete pump truck 3 to move to the top window 11 of the second lining formwork trolley 1.

[0078] S04, start the concrete pump truck 3, the gun barrel 4 provides concrete to the material distribution assembly 5 arranged on the secondary lining formwork trolley 1 through the top window 11, and the concrete is distributed to each casting window 14 through the material distribution assembly 5 to complete the casting of the side wall. It should be noted that during the casting process, the concrete is poured from low to high in sequence until the side wall is cast.

[0079] More specifically, the material distribution assembly 5 includes: a main hopper corresponding to the top window 11 and a distribution hopper 51 arranged along the height direction of the tunnel, the main hopper and the distribution hopper 51 are connected through a first shuttle groove 52, and the distribution hopper 51 is connected to the casting window 14 through a second shuttle groove 53; wherein the number of the distribution hoppers 51 matches the number of rows of the casting windows 14.

[0080] S05, after the side wall is poured, close the top window 11 of the secondary lining formwork trolley 1 to pour the vault. During pouring, first move the gun barrel 4 to one end of the opening direction or close to the end of the secondary lining where the previous plate has been poured, then start the concrete pump truck to pour, and during the pouring process, the gun barrel 4 is retracted in coordination with the trolley of the longitudinal pouring trolley 2 according to the delivery pressure of the concrete pump truck 3 until the vault is poured.

[0081] S06, cleaning the delivery pipeline 6 of the concrete pump truck 3 and the gun barrel 4 connected to the delivery pipeline 6 to prevent the concrete from solidifying in the gun barrel 4 and causing blockage of the gun barrel 4.

[0082] S07. The trolley arranged on the top of the longitudinal pouring trolley descends, and the movable platform arranged on the top of the longitudinal pouring trolley 2 extends out to form an operating platform 27, on which the operator ties the steel bars required for the next plate.

[0083] S08. Repeat the process of step S01 to step S07 until the second lining casting in the entire tunnel is completed.

[0084] When pouring concrete, the two side templates 12 and the top template 13 fit the inner wall of the tunnel. When setting, the top window 11 on the top template 13 is opened, and the mobile trolley 22 drives the barrel 4 to align with the position of the top window 11, so that the concrete can enter the distribution component 5 through the top window 11, and the concrete flows to the designated pouring window 14 through the distribution component 5. It should be noted that during the pouring process, the pouring starts from the bottom pouring window 14 first, and the pouring window 14 is closed after the pouring is completed, and then the discharge port of the distribution component 5 is adjusted to pour the upper layer of concrete until the side wall is completely poured.

[0085] When pouring the vault, close the top window 11 and move the gun barrel 4 close to the end of the second lining of the upper plate, and then start pouring concrete. When the concrete buries the pipe mouth of the gun barrel 4, the pressure of the pump changes. The pump is withdrawn in time according to the pumping pressure (it should be specially noted that the pouring is always under pressure during the pouring process.) until the pouring of the vault is completed.

[0086] In one embodiment, if Figure 1 and Figure 4 As shown, the specific structure of the longitudinal pouring trolley 2 in step S02 includes: a frame 21 that can be lifted up and down, a mobile trolley 22, a barrel bracket 23, two fixed frames 24, a mobile frame 25 and a driving member 26. The bottom of the frame 21 is provided with a moving wheel to facilitate workers to move the longitudinal pouring trolley 2. The mobile trolley 22 is slidably arranged on the top of the frame 21, and can reciprocate along the construction direction of the tunnel. The mobile trolley 22 slides on the frame 21, and approaches or moves away from the second lining template trolley 1 during the sliding process. The barrel bracket 23 is installed on the side of the mobile trolley 22 away from the second lining template trolley 1. Two fixed frames 24 are installed at both ends of the mobile trolley 22 to position the gun barrel 4. The mobile frame 25 is slidably installed on the barrel bracket 23 for positioning the gun barrel 4. The driving member 26 is installed on the fixed frame 24 close to the second lining template trolley 1, and the movable end of the driving member 26 is connected to the gun barrel 4, and the moving frame 25 is driven to move on the gun barrel bracket 23 through the gun barrel 4.

[0087] When the side wall is being poured, the moving trolley 22 drives the gun barrel 4 to move so that the discharge port of the gun barrel 4 is aligned with the top window 11 .

[0088] When the vault is being poured, the mobile trolley 22 drives the barrel 4 to move to the end of the second lining of the upper plate. When the concrete blocks the discharge port of the barrel 4, causing the delivery pressure of the concrete pump truck 3 to change, the mobile trolley 22 is withdrawn in time according to the pumping pressure. During the pouring process, the position of the barrel 4 is adjusted according to the pressure of the concrete pump truck 3, until the mobile trolley 22 has been adjusted to the tail of the frame 21, the driving member 26 moves to drive the barrel 4 back. When the driving member 26 drives the mobile frame 25 to retreat to the end of the barrel bracket 23 away from the second lining template trolley 1, the pouring of the second lining of the plate is completed. After the pouring is completed, the pipes and barrels 4 used for pouring are cleaned to prevent the concrete from blocking them and affecting the secondary use.

[0089] In one embodiment, if Figure 7 , Fig.10 and Fig.11As shown, in order to facilitate fine-tuning the position of the gun barrel, the mobile trolley 22 includes: a liftable base 221, a mounting plate 222 and an angle driving mechanism 223. The bottom of the base 221 is slidably connected to the top of the frame 21, so that the mobile trolley 22 can move on the frame 21. The mounting plate 222 is mounted on the top of the base 221, one end of the mounting plate 222 and the end away from the second lining template trolley 1 are hinged to the base 221, the gun barrel bracket 23 is mounted on the end of the mounting plate 222 away from the second lining template trolley 1, and the fixing frame 24 is mounted on the top of the mounting plate 222. One end of the angle driving mechanism 223 is hinged to one end of the base 221 close to the second lining template trolley 1, and the other end is hinged to the mounting plate 222.

[0090] During use, the height of the gun barrel 4 is finely adjusted by the liftable base 221, so that the height of the gun barrel 4 is aligned with the height of the gun barrel mouth on the second lining template trolley 1. Then, the fixed frame 24 and the movable frame are adjusted left and right to align the axis of the gun barrel 4 with the axis of the gun barrel mouth. There is also the problem of adjusting the angle during the pouring process, so one end of the mounting plate 222 is hinged to the base 221, and the other end is provided with an angle driving mechanism 223. More specifically, when the angle adjustment is required, the angle driving mechanism 223 is extended and retracted to align the axis of the gun barrel 4 with the axis of the gun barrel mouth.

[0091] It should be noted that the angle driving mechanism 223 is a hydraulic cylinder, a pneumatic cylinder, a linear motor or other structures that can realize the telescopic function.

[0092] In one embodiment, if Figure 1 , Figure 4 and Fig.11 As shown, in order to adapt to the adjustment of the position of the barrel 4 when pouring concrete, the delivery pipeline 6 for conveying concrete is set to a multi-section structure. The delivery pipeline 6 includes: a first pipeline 61, a second pipeline 62, a third pipeline 63 and a connecting joint 64. One end of the first pipeline 61 is connected to the discharge port of the concrete pump truck 3, and the other end is connected to the top of the frame 21. One end of the second pipeline 62 is rotatably connected to one end of the first pipeline 61 set on the top of the frame 21 through a joint. One end of the third pipeline 63 is rotatably connected to the other end of the second pipeline 62 through a joint. One end of the connecting joint 64 is rotatably connected to the other end of the third pipeline 63, and the other end is connected to the barrel 4.

[0093] In order to facilitate the movement of the conveying pipeline 6 by the moving trolley 22 during the movement, the first pipeline 61 and the second pipeline 62 are connected by a joint, so that the second pipeline 62 can rotate relative to the first pipeline 61 during the movement. The second pipeline 62 and the third pipeline 63 are connected by a joint, which is convenient for the gun barrel 4 to rotate at the connection between the second pipeline 62 and the third pipeline 63. At the same time, in order to facilitate the retraction of the gun barrel 4, the gun barrel 4 and the third pipeline 63 are connected by a connecting joint 64, one end of the connecting joint 64 is rotatably connected to the third pipeline 63, and the other end of the connecting joint 64 is fixedly connected to the gun barrel 4.

[0094] In one embodiment, if Figure 4 As shown, in order to facilitate the driving member 26 to drive the moving frame 25 to move, the driving member 26 is a telescopic member, and its fixed end is installed on the two fixed frames 24, and the movable end of the driving member 26 is connected to the barrel 4 through a connecting plate 28.

[0095] The telescopic member in this embodiment is an oil cylinder. In other embodiments, the telescopic member may be a gas cylinder or an electric telescopic rod.

[0096] In one embodiment, if Figure 4 , Figure 5 and Figure 6 As shown, a sliding plate 241 and a sliding drive mechanism 242 are provided on the top of the fixed frame 24, the extension direction of the sliding drive mechanism 242 is perpendicular to the moving direction of the moving vehicle 22, and the moving end of the sliding drive mechanism 242 is connected to the sliding plate 241; a clamping assembly 243 is provided on the top of the sliding plate 241.

[0097] In order to facilitate the adjustment of the position of the gun barrel 4, a sliding plate 241 and a sliding drive mechanism 242 are provided on the top of the fixed frame 24, and the extending direction of the piston rod of the sliding drive mechanism 242 is perpendicular to the moving direction of the moving trolley 22. When the gun barrel 4 is inserted into the gun barrel mouth of the second lining template trolley 1, the sliding drive mechanism 242 drives the sliding plate 241 to move so that the gun barrel 4 is aligned with the gun barrel mouth. The gun barrel 4 is installed on the clamping assembly 243 on the sliding plate 241. After the gun barrel 4 is installed, it can slide in the clamping assembly 243, which is convenient for the driving member 26 to drive it to retreat.

[0098] It needs to be explained that if Figure 5 As shown, the clamping assembly 243 includes: two mounting plates 244 arranged opposite to each other, one mounting plate 244 is fixedly mounted on the top of the sliding plate 241, and the other mounting plate 244 is connected to the movable end of the clamping cylinder 245, and the clamping cylinder 245 drives the mounting plate 244 to move toward the other mounting plate 244, thereby fixing the barrel 4 between the two mounting plates 244.

[0099] In order to reduce the friction of the gun barrel 4 during the retraction process, rollers are arranged on the opposite side walls of the two mounting plates 244 , and the rollers are in contact with the outer side wall of the gun barrel 4 .

[0100] In one embodiment, if Figure 6 As shown, in order to reduce the friction of the moving frame 25 during movement, slide grooves 231 are provided on the two side walls of the barrel bracket 23 along its movement direction, and a pulley 251 is provided on the moving frame 25, and the pulley 251 is arranged in the slide groove 231.

[0101] In one embodiment, if Figure 6 As shown, the movable frame 25 includes: two positioning plates 252, a connecting column 253 arranged between the two positioning plates 252, and a mounting frame 254, the pulley 251 is provided on both positioning plates 252, and the mounting frame 254 is installed on the connecting column 253 and can move along the axial direction of the connecting column 253.

[0102] It should be further explained that the mounting frame 254 is in contact with the connecting column 253 via a rotating roller, thereby reducing the friction of the mounting frame 254 during movement.

[0103] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunnel secondary lining longitudinal pouring process, characterized in that: The following steps are involved: S01. The secondary lining formwork trolley moves to the predetermined position and is positioned and reinforced; S02. The longitudinal pouring trolley and concrete pump truck are adjusted to the predetermined positions; S03. The trolley on the top of the longitudinal pouring trolley drives the gun barrel connected to the concrete pump truck to move to the top window of the secondary lining formwork trolley; S04, start the concrete pump truck, and complete the pouring of the side wall through the material distribution assembly set on the secondary lining formwork trolley, and pour from low to high in sequence until the side wall is poured; S05. After the side wall is poured, close the top window of the secondary lining formwork trolley to pour the vault. First, move the gun barrel to one end of the opening or close to the end of the secondary lining where the previous plate has been poured, and then start the concrete pump truck to pour. During the pouring process, the gun barrel is retracted according to the delivery pressure of the concrete pump truck and the trolley of the longitudinal pouring trolley until the vault is poured. S06. Cleaning the delivery pipeline of the concrete pump truck and the gun barrel connected to the delivery pipeline; S07. The trolley arranged on the top of the longitudinal pouring trolley descends, and the movable platform arranged on the top of the longitudinal pouring trolley extends to form an operating platform, on which the operator ties the steel bars required for the next plate; S08. Repeat the process of step S01 to step S07 until the second lining casting in the entire tunnel is completed.

2. The tunnel secondary lining longitudinal pouring process according to claim 1 is characterized in that: The second lining formwork on the second lining formwork trolley in step S01 includes: two side formworks for casting the tunnel side walls and a top formwork arranged on the top of the two side formworks, the side formworks are provided with multiple rows of casting windows along their height direction, the outlet of the material distribution assembly is arranged corresponding to the casting windows; the top of the top formwork is provided with a top window.

3. The tunnel secondary lining longitudinal pouring process according to claim 2 is characterized in that: The material distribution assembly in step S04 includes: a main material hopper corresponding to the top window and a distribution material hopper arranged along the height direction of the tunnel, the main material hopper and the distribution material hopper are connected through a first shuttle groove, and the distribution material hopper is connected to the casting window through a second shuttle groove; Wherein, the number of the distribution hoppers matches the number of rows of the casting windows.

4. The tunnel secondary lining longitudinal pouring process according to claim 1 is characterized in that: The specific structure of the longitudinal pouring trolley in step S02 includes: A frame that can be raised and lowered, with movable wheels provided at the bottom of the frame; A movable trolley is slidably arranged on the top of the frame, and the movable trolley can move toward or away from one side of the secondary lining formwork trolley; a gun barrel bracket, arranged on a side of the mobile trolley away from the second lining template trolley; Two fixing frames are arranged at both ends of the mobile trolley; A movable frame, arranged on the top of the gun barrel bracket; A driving member, used for driving the moving frame to move on the gun barrel bracket; Wherein, the gun barrel is arranged on the two fixed frames and the movable frame, and the fixed frames and the movable frame drive the gun barrel to move along the width direction of the frame.

5. The tunnel secondary lining longitudinal pouring process according to claim 4 is characterized in that: The mobile vehicle comprises: A liftable base, the bottom of which is slidably connected to the top of the frame; A mounting plate, one end of which is away from the secondary lining formwork trolley, is hinged to the base, the barrel bracket is mounted on the end of the mounting plate away from the secondary lining formwork trolley, and the fixing frame is slidably mounted on the top of the mounting plate so that the fixing frame can slide along the width direction of the fixing frame; An angle driving mechanism has one end hinged to one end of the base close to the second lining template trolley, and the other end hinged to the mounting plate.

6. The tunnel secondary lining longitudinal pouring process according to claim 4 is characterized in that: The delivery pipeline comprises: A first pipeline, one end of which is connected to the discharge port of the concrete pump truck, and the other end of which is connected to the top of the frame; A second pipe, one end of which is rotatably connected to one end of the first pipe disposed on the top of the frame through a joint; A third pipe, one end of which is rotatably connected to the other end of the second pipe through a joint; A connecting joint has one end rotatably connected to the other end of the third pipe, and the other end connected to the gun barrel.

7. The tunnel secondary lining longitudinal pouring process according to claim 4 is characterized in that: The driving member is a telescopic member, a fixed end of which is mounted on the two fixing frames, and a movable end of the driving member is connected to the gun barrel through a connecting plate.

8. The tunnel secondary lining longitudinal pouring process according to claim 4 is characterized in that: A sliding plate and a sliding drive mechanism are arranged on the top of the fixed frame. The extending direction of the sliding drive mechanism is perpendicular to the moving direction of the moving vehicle. The moving end of the sliding drive mechanism is connected to the sliding plate. A clamping assembly is arranged on the top of the sliding plate.

9. The tunnel secondary lining longitudinal pouring process according to claim 4 is characterized in that: The barrel bracket is provided with sliding grooves on both side walls along the moving direction thereof, and the movable frame is provided with a pulley, and the pulley is arranged in the sliding grooves.

10. The tunnel secondary lining longitudinal pouring process according to claim 9, characterized in that: The movable frame comprises: two positioning plates, a connecting column arranged between the two positioning plates and a mounting frame, the pulleys are arranged on the two positioning plates, the mounting frame is installed on the connecting column and can move along the axial direction of the connecting column.

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