Concrete piping switching device, concrete pouring system, and concrete pouring method

Abstract

To provide a changeover device for concrete pipings, a concrete installation system, and a concrete installation method capable of achieving labor-saving and manpower saving construction through integrated control of concrete installation at a plurality of installation mouths.SOLUTION: A changeover device 1 for concrete pipings is provided with at least: a body part 10; an introduction pipe 20; an installation pipe 30; a passage pipe 40; movable unit 60; and a sealing unit 70. A concrete installation system A is provided with a plurality of changeover devices 1 for the concrete pipings, connecting the passage pipe 40 of one of the changeover devices 1 for the concrete pipings to the introduction pipe 20 of the other of the changeover devices 1 for the concrete pipings. A concrete installation method includes: a first process installing concrete through setting an upper changeover device 1 for the concrete pipings to a passing mode M2, and a lower changeover device 1 for the concrete pipings to a connection mode Mc and an installation mode M1; and a second process installing concrete through setting the upper changeover device 1 for the concrete pipings to the connection mode Mc and the installation mode M1, and the lower changeover device 1 for the concrete pipings to an interruption mode Ms.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a concrete pipe switching device, a concrete pouring system, and a concrete pouring method, and in particular to a concrete pipe switching device, a concrete pouring system, and a concrete pouring method that can achieve labor-saving and manpower-saving construction by collectively controlling the pouring of concrete at multiple pouring ports. [Background technology]

[0002] In mountain tunnel construction, a portable tunnel lining formwork is placed inside the tunnel, and concrete is poured into the pouring space defined between the sprayed concrete surface or waterproof sheet surface and the skin plate surface of the formwork body, thereby forming the lining concrete. Concrete is poured through multiple pouring windows installed in the formwork. Specifically, the lowest of the multiple pouring windows are opened, and the concrete pressure pipe is pushed out from the pouring window into the pouring space to pour the concrete. When the concrete level rises close to the pouring window, the pouring window in use is closed, the pouring window above it is opened, and the concrete pressure pipe is moved to the upper pouring window to continue pouring. These steps are repeated, and finally the concrete is sprayed up from the pouring window at the top to complete the pour (manual construction). In addition, Patent Document 1 discloses a lining concrete pouring system that includes a primary switching device, a primary distribution pipe, a secondary switching device, a secondary distribution pipe, and a control device, and by switching between the primary switching device and the secondary switching device using the control device, it is possible to manage the pouring positions at multiple pouring windows and perform construction with a small number of workers (mechanized construction). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-73893 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional manual construction technique has the following problems. <1> To ensure that the concrete is evenly distributed within the casting space, workers must hold the concrete pressure pipe and move within the formwork in the axial direction of the tunnel while pouring. Furthermore, as pouring progresses, workers must carry the concrete pressure pipe upwards. This places a great physical strain on the workers. <2> Pouring windows are opened and closed using steel doors, which weigh over 30-40 kg and require a great deal of force to open and close. When pouring concrete, these heavy doors must be opened and closed in sequence as the pouring progresses, placing a great physical strain on the workers. <3> Concrete is poured simultaneously through multiple pouring windows, requiring a large number of workers, which makes work inside the narrow formwork complicated and increases labor costs.

[0005] The conventional mechanized construction techniques have the following problems: <1> The distribution pipes branch into many branches, making control and operation difficult and prone to operational errors. In addition, the many components and complex structure make manufacturing costs high, and maintenance is time-consuming and costly. <2> After concrete is poured, the distribution pipes must be cleaned before the remaining concrete hardens. However, because this system has a large number of distribution pipes, cleaning the remaining concrete requires a significant workload. In addition, because the total length of the distribution pipes is long, a large amount of wastewater is generated during cleaning. The wastewater after cleaning cannot be discharged directly into the mine, and must be treated, such as by classifying the aggregate, which requires a significant workload. <3> The large number of distribution pipes and the long total length of the pipelines occupy a large amount of the limited space inside the formwork, which reduces the space available for other equipment and makes it difficult for workers to work.

[0006] An object of the present invention is to provide a concrete pipe switching device, a concrete pouring system, and a concrete pouring method to solve the above-mentioned problems of the conventional technology. [Means for solving the problem]

[0007] The concrete piping switching device of the present invention comprises a main body, an inlet pipe, a pouring pipe connected to the main body, a passing pipe connected to the main body, a moving unit that can switch between a connection mode in which the tip of the inlet pipe is connected to the base end of the pouring pipe and the tip of the pouring pipe is connected to the pouring port, and a blocking mode in which the tip of the inlet pipe is connected to the base end of the passing pipe, by moving the main body relative to the formwork body, and a sealing unit that connects to the passing pipe and can seal the pouring port from the inside in the blocking mode, and is characterized in that in the connection mode, concrete can be discharged outside the formwork body through the inlet pipe, the pouring pipe, and the pouring port.

[0008] The concrete piping switching device of the present invention comprises a main body, an inlet pipe, a pouring pipe connected to the main body, a passing pipe connected to the main body, a switching unit that can switch between a pouring mode in which the tip of the inlet pipe is connected to the base end of the pouring pipe and a passing mode in which the tip of the inlet pipe is connected to the base end of the passing pipe by moving the inlet pipe relative to the main body, a moving unit that can switch between a connection mode in which the tip of the pouring pipe is connected to the pouring port and a blocking mode in which the tip of the pouring pipe is not connected to the pouring port by moving the main body relative to the formwork body, and a sealing unit that can seal the pouring port from the inside in the blocking mode, and is characterized in that it is configured so that concrete can be discharged outside the formwork body through the inlet pipe, the pouring pipe, and the pouring port in the pouring mode and the connection mode.

[0009] In the concrete pipe switching device of the present invention, the sealing unit may have a sealing lid shaped to be able to seal the pouring port, and sealing means that can move the sealing lid toward and away from the pouring port.

[0010] In the concrete pipe switching device of the present invention, the switching unit may be an oil cylinder, an air cylinder, or an electric cylinder, one end of which is connected to the main body and the other end of which is connected to the introduction pipe.

[0011] In the concrete pipe switching device of the present invention, the moving unit may be an oil cylinder, an air cylinder, or an electric cylinder, one end of which is connected to the formwork body and the other end of which is connected to the main body.

[0012] The concrete pouring system of the present invention is characterized in that the tip of the passage pipe in one concrete pipe switching device is connected to the base end of the introduction pipe in another concrete pipe switching device.

[0013] The concrete pouring method of the present invention includes a first step of setting an upper concrete pipe switching device to a disconnection mode, setting a lower concrete pipe switching device to a connection mode, and pouring concrete outside a formwork body through a pouring pipe of the lower concrete pipe switching device; and a second step of setting the upper concrete pipe switching device to connection mode, setting the lower concrete pipe switching device to disconnection mode, and pouring concrete outside the formwork body through the pouring pipe of the upper concrete pipe switching device.

[0014] The concrete pouring method of the present invention is characterized by comprising a first step of setting the concrete pipe switching device located above to a passing mode, setting the concrete pipe switching device located below to a connection mode and a pouring mode, and pouring concrete outside the formwork body through the pouring pipe of the concrete pipe switching device located below, and a second step of setting the concrete pipe switching device located above to a connection mode and a pouring mode, setting the concrete pipe switching device located below to a disconnection mode, and pouring concrete outside the formwork body through the pouring pipe of the concrete pipe switching device located above.

[0015] In the second step of the concrete pouring method of the present invention, the concrete pipe switching device located below may be set to a passing mode, and the inside of the passing pipe of the concrete pipe switching device located above, and the inlet pipe and passing pipe of the concrete pipe switching device located below may be washed with cleaning water. [Effects of the Invention]

[0016] The concrete pipe switching device, concrete pouring system, and concrete pouring method of the present invention have at least one of the following effects. <1> Concrete pouring at multiple pouring ports can be controlled automatically or semi-automatically, thereby achieving labor-saving and manpower-saving construction. <2> There is less physical strain on workers as they do not need to transport concrete pressure pipes or open and close pouring windows. <3> Since construction can be carried out with a small number of workers, labor costs can be reduced. <4> Because it has a simple structure consisting of a piping system that is continuous in the circumferential direction of the formwork body, the manufacturing cost is relatively low and maintenance is easy. <5> While pouring concrete, the pipes in the same system can be cleaned at the same time, so any remaining concrete can be disposed of in a timely manner. <6> The piping system is simple and the total length of the piping is relatively short, making it easy to wash away the remaining concrete and producing a relatively small amount of wastewater. [Brief explanation of the drawings]

[0017] [Figure 1] Illustration of concrete pipe switching device [Figure 2] Illustration of concrete pouring system [Figure 3] Illustration of pouring mode [Figure 4] Passing mode diagram [Figure 5] Shutdown mode diagram [Figure 6] Explanatory diagram of the sealing unit [Figure 7A] Illustration of concrete pouring method (1) [Figure 7B] Illustration of concrete pouring method (2) [Figure 7C] Illustration of concrete pouring method (3) [Figure 7D] Illustration of concrete pouring method (4) [Figure 7E]Illustration of concrete pouring method (5) [Figure 7F] Illustration of concrete pouring method (6) [Figure 8A] Explanatory diagram of Example 2 (1) [Figure 8B] Explanatory diagram of Example 2 (2) [Figure 8C] Explanatory diagram of Example 2 (3) DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, the concrete pipe switching device, concrete pouring system, and concrete pouring method of the present invention will be described in detail with reference to the drawings. [Example]

[0019] [Concrete piping switching device] <1> Overall configuration (Figure 1) The concrete pipe switching device 1 of the present invention is a device for switching the flow path of concrete in a formwork X for tunnel lining. The concrete pipe switching device 1 includes at least a main body 10, an inlet pipe 20, a pouring pipe 30 connected to the main body 10, a passing pipe 40 connected to the main body 10, a switching unit 50 that can switch the inlet pipe 20 between a pouring mode M1 and a passing mode M2, and a moving unit 60 that can switch the pouring pipe 30 between a connection mode Mc and a disconnection mode Ms. In this example, the device further includes a sealing unit 70. In this description, terms such as "upper" and "lower" refer to the respective directions of the concrete pipe switching device 1 installed on the side of the formwork body X2 (i.e., the respective directions in Figure 1), but if the concrete pipe switching device 1 is installed at an angle, for example, near the top of the formwork body X2, the direction will be tilted horizontally.

[0020] <1.1> Concrete pouring system (Figure 2) The concrete pouring system A is a system for pouring lining concrete. The concrete pouring system A is configured by connecting a plurality of concrete pipe switching devices 1 with connecting pipes A1. Here, the connecting pipes A1 include the introduction pipes 20 and passage pipes 40 of each concrete pipe switching device 1. The concrete pouring system A can automatically or semi-automatically perform all or part of the concrete pouring method described below by controlling all concrete pipe switching devices 1 and all of their components by a computer according to a predetermined program. The concrete pouring system A is arranged in a row within the formwork body X2, from the top edge to both sides downward of the formwork body X2 in the circumferential direction of the formwork body X2, and multiple rows of these are arranged in parallel along the longitudinal direction of the formwork body X2. In this example, each row is equipped with eight concrete pipe switching devices 1, and these are arranged in six rows. In this example, of the multiple concrete pipe switching devices 1 arranged in parallel in the vertical direction, the lower end of the passage pipe 40 of the upper concrete pipe switching device 1 is connected to the upper end of the introduction pipe 20 of the lower concrete pipe switching device 1. The base end (upper end) of the uppermost connecting pipe A1 (introduction pipe 20) is connected to a concrete supply pipe of a concrete supply device (not shown). The tip (lower end) of the lowest connecting pipe A1 (passage pipe 40) opens into the interior of the formwork body X2. In this example, the concrete is allowed to flow down naturally from above, but it can also be forced in from below by rotating the concrete pipe switching device 1 180 degrees in a vertical plane. Therefore, the concrete supply device 1 can also be used as a blow-up type, where the concrete is forced from below to above.

[0021] <1.2> Tunnel lining formwork (Fig. 2) The tunnel lining formwork X includes at least a base X1 that can move in the tunnel axial direction, a formwork body X2 that is erected on the base X1 so as to be able to move up and down freely, and a plurality of pouring ports X3 that pass through the formwork body X2. The base X1 is a frame-like body made by connecting a plurality of steel members assembled in a roughly gate shape in the direction of the tunnel extension. The base X1 is equipped with wheels at the bottom for mobility. Between the base X1 and the formwork body X2, there is provided an unfolding device that unfolds the formwork body X2 when pouring the lining concrete. The multiple pouring ports X3 are arranged at predetermined intervals along the circumferential direction of the tunnel lining formwork X to form a row, and multiple rows are arranged in parallel in the longitudinal direction of the tunnel lining formwork X. A concrete pouring system A is arranged inside the formwork body X2, and the pouring pipe 30 of each concrete piping switching device 1 can be connected to the pouring port X3 from inside the formwork body X2.

[0022] <2> Main body The main body 10 is a member that holds the casting pipe 30 and the like. The main body 10 is fixed to the inner surface of the formwork body X2 so as to be slidable relative to the position of the pouring port X3. In this example, a structure is adopted in which the main body 10 is fixed to the tunnel lining formwork X by a moving unit 60 so as to be slidable in the longitudinal direction thereof. In this example, the main body 10 includes a main body plate 11 and two slide guides 12 provided on the upper surface of the main body plate 11. An introduction pipe 20 is disposed on the main body plate 11. More specifically, a slide plate 22 of the introduction pipe 20, which will be described later, is slidably held between two slide guides 12. Below the main body plate 11, a pouring pipe 30 and a passing pipe 40 are connected in parallel.

[0023] <3> Introductory tube The introduction pipe 20 is a pipe for introducing concrete into the pouring pipe 30 or the passing pipe 40 . In this example, the introduction pipe 20 comprises a pipe body 21 made of a steel pipe and a slide plate 22 attached to the tip of the pipe body 21 . The base end of the pipe main body 21 is connected to the tip of the passing pipe 40 in the upper concrete pipe switching device 1. Here, the pipe main body 21 and the passing pipe 40 may be integral with each other. The slide plate 22 has a through hole that connects to the inside of the pipe body 21 . The slide plate 22 is slidably held between the slide guides 12 of the main body 10 . By sliding the slide plate 22, the pipe line of the pipe body 21 can be selectively connected to the pouring pipe 30 or the passing pipe 40.

[0024] <4> Casting pipe The pouring pipe 30 is a pipe that delivers concrete to the pouring port X3. In this example, a steel pipe with its tip bent at approximately 90 degrees relative to its base end is used as the casting pipe 30. The base end of the casting pipe 30 is connected to the underside of the main body plate 11 and communicates with the through hole in the main body plate 11. The tip of the pouring pipe 30 protrudes toward the pouring port X3 of the formwork body X2, and connects with the pouring port X3 in a connection mode Mc, which will be described later.

[0025] <5> passage tube The passage pipe 40 is a pipe that sends concrete to the introduction pipe 20 below. In this example, a steel pipe is used as the passage pipe 40 . The base end of the passage pipe 40 is connected to the lower surface of the body plate 11 and communicates with the through-hole of the body plate 11 . The tip of the passage pipe 40 extends downward along the circumferential direction of the formwork body X2 and is connected to the base end of the introduction pipe 20 in the concrete pipe switching device 1 below.

[0026] <6> Switching Unit The switching unit 50 is a unit that switches the connection of the introduction pipe 20 . The switching unit 50 has a structure in which one part is connected to the main body 10 and the other part is connected to the introduction pipe 20, and the introduction pipe 20 can be moved relative to the main body 10. In this example, an oil cylinder is used as the switching unit 50, with its base end connected to the main body plate 11 of the main body portion 10 and its tip connected to the pipe main body 21 of the introduction pipe 20. However, the switching unit 50 is not limited to the above, and may be, for example, an air cylinder, an electric cylinder, a manual switching mechanism, etc. Also, the base end and the tip end of the cylinder may be connected in reverse. By moving the introduction pipe 20 relative to the main body 10 using the switching unit 50, the introduction pipe 20 can be switched between a pouring mode M1 and a passing mode M2.

[0027] <6.1> Pouring mode (Fig. 3) The pouring mode M1 is a mode for pouring concrete from the pouring port X3. In this example, in pouring mode M1, the switching unit 50 shortens and the tip of the switching unit 50 pulls the introduction pipe 20, causing the slide plate 22 of the introduction pipe 20 to slide within the slide guide 12 of the main body 10, and the tip of the introduction pipe 20 connects with the base end of the pouring pipe 30. Alternatively, the switching unit 50 may be extended and the tip of the switching unit 50 may push out the introduction pipe 20, so that the tip of the introduction pipe 20 connects with the base end of the pouring pipe 30.

[0028] <6.2> Passing mode (Fig. 4) The passing mode M2 ​​is a mode for passing the concrete to the next concrete pipe switching device 1. In this example, in the passing mode M2, the switching unit 50 extends, and the tip of the switching unit 50 pushes out the introduction tube 20, causing the slide plate 22 of the introduction tube 20 to slide within the slide guide 12 of the main body 10, and the tip of the introduction tube 20 connects with the base end of the passing tube 40. Alternatively, the switching unit 50 may be shortened and the tip of the switching unit 50 may pull the introduction tube 20, so that the tip of the introduction tube 20 connects with the base end of the passage tube 40.

[0029] <7> Mobile Unit The moving unit 60 is a unit that moves the main body 10. The moving unit 60 has a structure in which one part is connected to the formwork body X2 and the other part is connected to the main body part 10, and the main body part 10 can be moved relative to the formwork body X2. In this example, the moving unit 60 is an oil cylinder whose base end is connected to the inner surface of the formwork body X2 and whose tip end is connected to the main body plate 11 of the main body portion 10. However, the moving unit 60 is not limited to the above, and may be, for example, an air cylinder, an electric cylinder, a manual switching mechanism, etc. Also, the base end and the tip end of the cylinder may be connected in reverse. By using the moving unit 60 to move the main body 10 relative to the formwork body X2, the pouring port X3 can be switched between a connecting mode Mc and a disconnecting mode Ms.

[0030] <7.1> Connection mode (Fig. 4) The connection mode Mc is a mode in which the pouring port X3 is connected to the tip of the pouring pipe 30. In this example, in connection mode Mc, the moving unit 60 shortens and the tip of the moving unit 60 pulls the main body 10, causing the pouring pipe 30 to move together with the main body 10, and the tip of the pouring pipe 30 connects with the pouring port X3. Alternatively, the moving unit 60 may be extended and the tip of the moving unit 60 may push out the main body 10, thereby connecting the tip of the casting pipe 30 to the casting port X3.

[0031] <7.2> Shutdown mode (Fig. 5) The shut-off mode Ms is a mode in which the pouring port X3 is disconnected from the pouring pipe 30. In this example, in the blocking mode Ms, the moving unit 60 extends, and the tip of the moving unit 60 pushes out the main body 10, causing the pouring pipe 30 to move together with the main body 10, and the tip of the pouring pipe 30 moves away from the pouring port X3. At this time, the sealing unit 70 attached to the main body 10 is positioned inside the pouring port X3. Alternatively, the structure may be such that the moving unit 60 shortens and the tip of the moving unit 60 pulls the main body 10, thereby moving the tip of the casting pipe 30 away from the casting port X3.

[0032] <8> Sealing unit (Fig. 6) The sealing unit 70 is a unit that seals the pouring port X3. The sealing unit 70 includes a sealing lid 71 and a sealing means 72 . The sealing lid 71 is a lid having a shape that can seal the pouring opening X3. In this example, the sealing lid 71 is a cylindrical member that can be fitted into the pouring opening X3. When the sealing lid 71 is fitted into the pouring opening X3, the surface of the sealing lid 71 is flush with the surface of the formwork body X2. The sealing means 72 is a means for advancing and retracting the sealing lid 71 toward the pouring opening X3. That is, the sealing means 72 closes the pouring opening X3 with the sealing lid 71 by expanding and contracting the sealing lid 71 from the main body 10 side toward the pouring opening X3 side, and opens the pouring opening X3 by retracting the sealing lid 71 from the pouring opening X3 toward the main body 10 side. In this example, the sealing means 72 is an oil cylinder whose base end is connected to the main body 10, whose tip is directed toward the pouring port X3, and whose tip is fitted with a sealing lid 71. However, the sealing means 72 is not limited to the above, and may be, for example, an air cylinder, an electric cylinder, a manual sealing mechanism, etc. Also, the base end and the tip end of the cylinder may be connected in reverse. Alternatively, the sealing unit 70 may not be provided, and a lid may be provided on the pouring port X3 so that the port can be manually sealed.

[0033] <9> Concrete pouring method Using the concrete pouring system A of the present invention, concrete can be poured, for example, as follows. In this example, we will explain the functions of three concrete pipe switching devices 1 that are lined up circumferentially from the top end of the formwork body X2 in one concrete pouring system A. For ease of explanation, these three concrete pipe switching devices 1 will be referred to as upper switching device 1a, middle switching device 1b, and lower switching device 1c, from top to bottom.

[0034] <9.1> Pouring concrete from the lower switching device (Figure 7A) The upper switching device 1a is set to the pass mode M2 ​​and the connection mode Mc. The intermediate switching device 1b is set to the pass mode M2 ​​and the connection mode Mc. The lower switching device 1c is set to pouring mode M1 and connection mode Mc. In this state, concrete is pumped from the concrete supply device to the inlet pipe 20 of the upper switching device 1a. As a result, the concrete passes through the passage pipe 40 of the upper switching device 1a, the inlet pipe 20 and passage pipe 40 of the middle switching device 1b, and the inlet pipe 20 and pouring pipe 30 of the lower switching device 1c, and is discharged from the pouring port X3 corresponding to the lower switching device 1c into the pouring space outside the formwork body X2. The upper switching device 1a and the middle switching device 1b may be in the disconnection mode Ms instead of the connection mode Mc.

[0035] <9.2> Switching the switching device to pouring mode (Fig. 7B) When the liquid surface of the concrete being poured in the pouring space approaches below the pouring port X3 of the lower switching device 1c, pouring is temporarily stopped and the middle switching device 1b is switched from passing mode M2 ​​to pouring mode M1 (Figure 3). In detail, the switching unit 50 of the intermediate switching device 1b is operated to connect the introduction pipe 20 to the pouring pipe 30.

[0036] <9.3> Switching the lower switching device to pass-through mode (Figure 7C) The lower switching device 1c is switched from pouring mode M1 to passing mode M2. Specifically, the switching unit 50 of the lower switching device 1c is operated to connect the inlet pipe 20 to the passage pipe 40 (FIG. 4). This allows the formation of a piping route for pouring consisting of the upper switching device 1a and the middle switching device 1b, as well as a piping route for washing remaining concrete consisting of the passage pipe 40 of the middle switching device 1b and the introduction pipe 20 and passage pipe 40 of the lower switching device 1c. Therefore, by injecting cleaning water into the passing pipe 40 of the middle switching device 1b, it is possible to wash the remaining concrete adhering to the passing pipe 40 of the middle switching device 1b and the inside of the introduction pipe 20 and passing pipe 40 of the lower switching device 1c in parallel with the subsequent processes. The wastewater after washing is recovered from the passing pipe 40 of the lower switching device 1c. In addition, if there is no need to clean the remaining concrete in parallel with pouring the concrete, the lower switching device 1c may not be switched to passing mode M2, but may remain in pouring mode M1 and the subsequent steps may be carried out.

[0037] <9.4> Moving the main body of the lower switching device (Fig. 7D) The lower switching device 1c is switched from the connection mode Mc to the disconnection mode Ms. In detail, the moving unit 60 of the lower switching device 1c is operated to remove the pouring pipe 30 from the pouring port X3, and the sealing unit 70 is positioned inside the pouring port X3 (FIG. 5).

[0038] <9.5> Sealing of the pouring hole (Fig. 7E) The pouring port X3 is sealed with a sealing unit 70. In detail, by operating the sealing unit 70 of the lower switching device 1c and extending the sealing means 72, the sealing lid 71 is fitted into the pouring opening X3, and the surface of the sealing lid 71 is made flush with the surface of the formwork body X2 (Figure 6).

[0039] <9.6> Pouring concrete from the center switching device (Figure 7F) Concrete is pumped from the concrete supply device to the inlet pipe 20 of the upper switching device 1a. As a result, the concrete passes through the passage pipe 40 of the upper switching device 1a, the inlet pipe 20 of the middle switching device 1b, and the pouring pipe 30, and is then discharged from the pouring port X3 corresponding to the middle switching device 1b into the pouring space outside the formwork body X2. The concrete flows along the surface of the formwork body X2 into the pouring port X3 of the lower switching device 1c, but since the pouring port X3 of the lower switching device 1c is sealed with a sealing cover 71, the concrete does not enter the pouring port X3. [Example]

[0040] [Example without a switching unit] In this embodiment, the switching unit 50 is not provided, and the piping is switched only by the moving unit 60. Note that the description of the same structures and steps as in the first embodiment will be omitted. The concrete pipe switching device 1 of this example includes at least a main body 10, an introduction pipe 20, a pouring pipe 30, a passing pipe 40, a moving unit 60, and a sealing unit . The casting pipe 30 and the passing pipe 40 are connected to the main body 10. In this example, the casting pipe 30 and the passing pipe 40 are arranged side by side below the main body plate 11 of the main body 10, and the base ends of the casting pipe 30 and the passing pipe 40 pass through the main body plate 11. The base end of the moving unit 60 is fixed to the formwork body X2, and the tip end is fixed to the main body 10. By using the moving unit 60 to move the main body 10 relative to the formwork body X2, the pouring pipe 30 is switched between the connection mode Mc and the disconnection mode Ms. In connection mode Mc, the casting pipe 30 corresponds to the position of the casting port X3, the tip of the introduction pipe 20 is connected to the base end of the casting pipe 30 via the main body plate 11, and the tip of the casting pipe 30 is connected to the casting port X3 (Figure 8A). In the shutoff mode Ms, the passage pipe 40 corresponds to the position of the pouring port X3, and the tip of the introduction pipe 20 is connected to the base end of the passage pipe 40 via the main body plate 11 (FIG. 8B). The sealing unit 70 is installed on the front side of the passage pipe 40, that is, on the formwork body X2 side, at a position where the pouring port X3 can be sealed from the inside in the blocking mode Ms. In the blocking mode Ms, the sealing lid 71 can be extended and retracted from the main body 10 side toward the pouring opening X3 side, thereby closing the pouring opening X3 with the sealing lid 71 (FIG. 8C). In this example, compared to the first embodiment, the structure of the concrete pipe switching device 1 is simplified, the operation is made easier, and the concrete pipe switching device 1 can be made smaller. [Explanation of symbols]

[0041] 1 Concrete pipe switching device 1a Upper switching device 1b Medium switching device 1c Lower switching device 10 Main body 11 Main board 12 Slide Guide 20 Introductory pipe 21 Tube body 22 Slide plate 30 Casting pipe 40 Passage pipe 50 Switching Unit 60 Mobile Units 70 Sealing Unit 71 Sealing lid 72 Sealing means A Concrete pouring system A1 connecting pipe M1 pouring mode M2 Passing Mode Mc Connection Mode Ms Shutdown Mode X Tunnel lining formwork X1 base X2 formwork body X3 pouring hole

Claims

1. A concrete piping switching device in a tunnel lining formwork having a substantially semi-cylindrical formwork body and a pouring port communicating with the formwork body, a main body; An introduction tube; A pouring pipe connected to the main body; a passage pipe connected to the main body; A moving unit that can be switched between a connection mode in which the tip of the introduction pipe is connected to the base end of the pouring pipe and the tip of the pouring pipe is connected to the pouring port by moving the main body relative to the formwork body, and a blocking mode in which the tip of the introduction pipe is connected to the base end of the passing pipe; A sealing unit connected to the passage pipe, the sealing unit being capable of sealing the pouring port from the inside in the blocking mode; In the connection mode, concrete can be discharged to the outside of the formwork body through the introduction pipe, the pouring pipe, and the pouring port. Concrete pipe switching device.

2. A concrete piping switching device in a tunnel lining formwork having a substantially semi-cylindrical formwork body and a pouring port communicating with the formwork body, a main body; An introduction tube; A pouring pipe connected to the main body; a passage pipe connected to the main body; A switching unit that can be switched between a driving mode in which the tip of the driving pipe is connected to the base end of the driving pipe and a passing mode in which the tip of the driving pipe is connected to the base end of the passing pipe by moving the driving pipe relative to the main body, A moving unit that can be switched between a connection mode in which the tip of the pouring pipe is connected to the pouring port and a disconnection mode in which the tip of the pouring pipe is not connected to the pouring port by moving the main body relative to the formwork body; A sealing unit capable of sealing the pouring port from the inside in the blocking mode, In the pouring mode and the connection mode, the concrete can be discharged outside the formwork body through the introduction pipe, the pouring pipe, and the pouring port. Concrete pipe switching device.

3. A concrete pipe switching device as described in claim 1 or 2, characterized in that the sealing unit has a sealing lid shaped to seal the pouring port, and a sealing means that can move the sealing lid toward and away from the pouring port.

4. 3. The concrete pipe switching device according to claim 2, wherein the switching unit is an oil cylinder, an air cylinder, or an electric cylinder, one end of which is connected to the main body and the other end of which is connected to the inlet pipe.

5. 3. The concrete pipe switching device according to claim 1, wherein the moving unit is an oil cylinder, an air cylinder, or an electric cylinder, one end of which is connected to the formwork body and the other end of which is connected to the main body.

6. A concrete pouring system comprising a plurality of concrete pipe switching devices according to claim 1 or 2, The tip of the passing pipe in one of the concrete pipe switching devices is connected to the base end of the introduction pipe in another of the concrete pipe switching devices. Concrete pouring system.

7. 2. A concrete pouring method using a plurality of concrete pipe switching devices according to claim 1, wherein a tip of a passing pipe in one concrete pipe switching device is connected to a base end of an introduction pipe in another concrete pipe switching device, a first step of setting the concrete pipe switching device located above to the disconnection mode, setting the concrete pipe switching device located below to the connection mode, and pouring concrete outside the formwork body through the pouring pipe of the concrete pipe switching device located below; a second step of setting the upper concrete pipe switching device to the connection mode, setting the lower concrete pipe switching device to the disconnection mode, and pouring concrete outside the formwork body through the pouring pipe of the upper concrete pipe switching device, Concrete pouring method.

8. 3. A concrete pouring method using a plurality of concrete pipe switching devices according to claim 2, wherein a tip of a passing pipe in one concrete pipe switching device is connected to a base end of an introduction pipe in another concrete pipe switching device, A first step of setting the concrete pipe switching device located above to the passing mode, setting the concrete pipe switching device located below to the connection mode and the pouring mode, and pouring concrete outside the formwork body through the pouring pipe of the concrete pipe switching device located below; a second step of setting the upper concrete pipe switching device to the connection mode and the pouring mode, setting the lower concrete pipe switching device to the disconnection mode, and pouring concrete outside the formwork body through the pouring pipe of the upper concrete pipe switching device, Concrete pouring method.

9. 9. The concrete pouring method according to claim 8, characterized in that in the second step, the concrete pipe switching device located below is set to the passing mode, and the inside of the passing pipe of the concrete pipe switching device located above, and the inlet pipe and the passing pipe of the concrete pipe switching device located below are washed with cleaning water.

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