JP7497865B2 - Concrete pouring system - Google Patents

Description

The present invention relates to a pouring system used for pouring invert concrete.

In tunnel construction, the invert is constructed by pouring invert concrete into the bottom of the excavated section. Conventional methods for pouring invert concrete include using a boom-type concrete pump truck and pouring concrete directly from a concrete mixer truck on a mobile pier for tunnel construction (hereinafter simply referred to as the "mobile pier") (Patent Document 1).

With the former method, concrete is poured while moving the hose attached to the end of the boom, and with the latter method, concrete is poured through an opening in the girder or floor of the mobile pier using a special chute.

Japanese Patent Application Laid-Open No. 6-288196

However, when using a boom-type concrete pump truck, workers must hold the end hose attached to the end of the boom and move it to the desired position when changing the pouring position. Also, when pouring concrete directly from a concrete mixer truck on a mobile pier, workers must move a dedicated chute when changing the pouring position. Both the end hose and the dedicated chute are very heavy, so these tasks are very hard work for workers.

The present invention was made in consideration of these circumstances, and its goal is to provide a concrete pouring system that can reduce the workload of workers.

[Pouring system]
The casting system of the present invention is a system used for casting invert concrete, and includes a casting pipe and a casting pipe moving device. The casting pipe includes one casting pipe connected to a branch section that branches to the left and right at the end of a straight pipe section, or two casting pipes connected to an L-shaped bent pipe at the end of a straight pipe section. The straight pipe section can be attached and detached to the branch section or the two bent pipes. The straight pipe section is composed of multiple straight pipe components detachably connected. The casting pipe moving device includes a stand and a cart. A portion of the casting pipe is placed on the cart, and the cart can move in the longitudinal direction of the stand with a portion of the casting pipe on it.

The casting system of the present invention is equipped with a casting pipe moving device having a cart on which the casting pipe can be placed and rails on which the cart can move, thereby reducing the burden on workers when changing the length of the casting pipe.

FIG. 1 is a plan view showing an example of a concrete pouring system of the present invention. FIG. 2 is a view taken along the line II-II of FIG. FIG. 2 is a plan view of the casting system shown in FIG. 1 . A partially enlarged view of the casting pipe moving device and casting system shown in Figure 1. FIG. 6A is an enlarged view of a portion VIa in FIG. 5 , and FIG. 6B is an enlarged view of a portion VIb in FIG. 5 . FIG. 2 is a right side view of FIG. 1 . 8A is an enlarged view of a portion VIIIa in FIG. 7, and FIG. 8B is an enlarged view of a portion VIIIb in FIG. IX-IX arrow view of FIG. 3. FIG. 10 is an enlarged view of part X in FIG. 13A to 13C are diagrams illustrating the procedure for adjusting the length by removing straight pipe components. 11A to 11C are diagrams for explaining the procedure for adjusting the length by removing a branch pipe.

(Embodiment)
An example of an embodiment of the concrete pouring system of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an example of the concrete pouring system of the present invention. The concrete pouring system shown in FIG. 1 includes a pouring pipe moving device and a pouring piping. The concrete pouring system of the present invention is used for pouring concrete (invert concrete) when constructing an invert B in a tunnel A. As shown in FIG. 2, the concrete pouring system of the present invention is used by being disposed at a position lower than the movable pier C, so that other construction vehicles can pass over the movable pier C even during pouring of the invert concrete.

The pouring pipe moving device is a device for moving a pouring pipe 30 connected to a concrete supply device such as a concrete pumping vehicle E (hereinafter referred to as the "pumping vehicle"). As an example, the pouring pipe moving device shown in Figures 1 to 4 includes a platform 10 arranged in the longitudinal direction of the tunnel and a cart 20 that can move along the platform 10. The platform 10 is a ladder-shaped member in which multiple horizontal members 12 are installed at intervals between two vertical members 11 arranged in parallel with a gap between them. The vertical members 11 and horizontal members 12 can be made of steel materials of various shapes, including I-beams.

A rail 13 along which the trolley 20 moves is provided on the upper surface of each vertical member 11. The rail is provided along the longitudinal direction of each vertical member 11. As shown in Figures 5 and 6 (a) and (b), in this embodiment, angle iron is used as the rail 13. The rail 13 can also be made of a material other than an angle.

As shown in Figures 7 and 8(a) and (b), the platform 10 of this embodiment can be moved in the tunnel longitudinal direction by longitudinal movement means 15 provided on the bottom side of the mobile pier C. The longitudinal movement means 15 includes a longitudinal rail 15a, a hoisting device 15b that can move along the longitudinal rail 15a, and a support member 15c provided at the lower end of the hoisting device 15b.

As shown in Figures 7 and 8(a) and (b), the hoisting device 15b in this embodiment includes a roller 15d that fits into the longitudinal rail 15a, a suspension chain 15e connected to the roller 15d, and a chain block 15f for the suspension chain 15e. A hook 15g is provided on the suspension chain 15e, and the support material 15c is held via the hook 15g. The longitudinal direction moving means 15 can also be a towing vehicle capable of towing the platform 10 in the longitudinal direction of the tunnel.

The cart 20 is a mobile vehicle on which the casting pipe 30 is placed. The cart 20 in this embodiment has a mounting section 21 that is rectangular in plan view on which the casting pipe 30 is placed, and wheels 22 provided on the bottom side of the mounting section 21.

The mounting section 21 is a member on which the casting pipe 30 is placed, and is designed to be able to mount at least the branch section 32 (described later) that constitutes the casting pipe 30. As an example, the mounting section 21 shown in FIG. 4 comprises vertical frames 21a arranged in parallel with a gap between them, and horizontal frames 21b that are installed between the vertical frames 21a with a gap between them in the front-rear direction. In this embodiment, channel steel is used for the vertical frames 21a, and I-beam steel is used for the horizontal frames 21b. Two wheel flanges 21c are protruding from each horizontal frame 21b with a gap between them, and one wheel 22 is provided on each wheel flange 21c.

A lateral movement mechanism 23 is provided on the front side of the mounting section 21. The lateral movement mechanism 23 is a mechanism for moving the branch pipes 33 (described later) connected to each branch end of the branch section 32 in a direction intersecting the movement direction of the cart 20. As an example, the lateral movement mechanism 23 shown in Figures 3 and 4 has a base section 23a and a branch pipe holder 23b. The base section 23a is a member that functions as a guide rail for the movement of the branch pipe holder 23b. In this embodiment, the base section 23a has a length that protrudes to both outsides in the width direction of the cart 20, and a lateral rail 23c is protruded from its upper surface along the longitudinal direction. In this embodiment, an I-beam is used as the base section 23a, but the base section 23a can also be constructed of a material other than an I-beam.

The branch pipe holder 23b is a member that holds the branch pipe 33 connected to the branched end of the branch section 32. As shown in Figures 9 and 10, the branch pipe holder 23b in this embodiment is a member that is U-shaped in side view, with an upper frame 23d, a vertical frame 23e, and a lower frame 23f. The bottom side of the upper frame 23d is provided with lateral movement wheels 24 that move along the lateral rail 23c, and a branch pipe holder 23b that holds the branch pipe 33. As shown in Figure 4, two lateral movement wheels 24 are provided along the longitudinal direction of the lateral rail 23c. The number of lateral movement wheels 24 may be more or less than two.

The branch pipe holder 23b is a U-shaped member in a side view that supports the branch pipe 33 from below. As shown in FIG. 10, the branch pipe holder 23b is designed to hold the branch pipe 33 and fix its upper end to the bottom side of the upper frame 23d.

A reaction force receiving device 25 is provided on the upper surface side of the lower frame 23f. The reaction force receiving device 25 is a member for receiving the force acting on the vertical frame 23e and the lower frame 23f when the branch pipe 33 is held by the branch pipe holder 23b. In this embodiment, rollers are used as the reaction force receiving device 25. Each roller is attached to a flange 26 that protrudes upward from the lower frame 23f. Two rollers are provided along the longitudinal direction of the horizontal rail 23c. There may be more or less than two rollers.

The concrete pouring pipe 30 shown in FIG. 3 includes a straight pipe section 31 formed by detachably connecting multiple straight pipe components, and a branch section 32 connected to the tip of the straight pipe section 31. In this embodiment, the branch section 32 is a Y-shaped pipe with a bifurcated tip. The branch section 32 is provided with a valve 34 that switches the pouring flow path for the invert concrete and adjusts the pouring amount. In this embodiment, a pin valve is used as the valve 34. The valve 34 may be something other than a pin valve.

A branch pipe 33 is connected to each of the branching ends of the branching section 32. In this embodiment, two branch pipes 33 are connected to each of the branching ends. A swivel pipe 35 is provided at the tip of the most distal branch pipe 33 connected to each branching end to change the casting location. The swivel pipe 35 may be provided as needed, and can be omitted if not required.

(Example of use)
Next, an example of the use of the concrete pouring system of the present invention will be described. Here, an example of constructing an invert using the concrete pouring system of the embodiment will be described. In Fig. 1, D is a concrete mixer truck (hereinafter referred to as "mixer truck"), E is a pressure truck, and C is a mobile pier. In the figure, the right side is the face side, and the left side is the mouth side. In the example shown in Fig. 1, the mobile pier C is positioned to the right side in the width direction of the tunnel A, and the mixer truck D and pressure truck E are positioned to the left side.

First, the platform 10 of the pouring pipe moving device is placed in the longitudinal direction of tunnel A. As shown in Figures 1 and 7, the platform 10 is installed so that its front end is closer to the face than the current work area X, and its rear end is located in the already poured work area Y. In the example shown in Figures 1 and 7, the front and rear ends of the platform 10 are supported by jacks G placed on a height adjustment table F, and the platform 10 is made level by the jacks G. Note that when a central passage form H (see Figure 2) is installed when pouring the invert concrete, such as when providing a central passage in invert B, the platform 10 can also be placed on the central passage form H.

After the platform 10 is installed, the cart 20 is placed on the platform 10, and the branch section 32 of the casting pipe 30 is placed on the cart 20. A straight pipe section 31 consisting of multiple straight pipe components is connected in front of the branch section 32. Specifically, after connecting the first straight pipe component (first straight pipe component 31a) to the branch section 32 on the cart 20, the cart 20 is moved forward (toward the face) by about one first straight pipe component 31a, and the second straight pipe component (second straight pipe component 31b) is connected to the first straight pipe component 31a. After that, this procedure is repeated until the cart 20 reaches the desired position on the forward side of the current work area X, so that the straight pipe section 31 can be connected in front of the branch section 32. The connected straight pipe section 31 is supported by a support 14 provided on the platform 10 so that the entire straight pipe section 31 is horizontal.

A branch pipe 33 is connected to each branch end of the branching section 32 on the cart 20. Of the connected branch pipes 33, the most distal branch pipe 33 is held by the branch pipe holder 23b of the horizontal movement mechanism 23. When connecting two or more branch pipes 33 to each branch end, for example, the first branch pipe 33 (first branch pipe 33a) is held by the branch pipe holder 23b, and then the branch pipe holder 23b is moved forward by about one branch pipe 33, and the second branch pipe 33 (second branch pipe 33b) is placed between the branching section 32 and the first branch pipe 33a, and one end of the second branch pipe 33b is connected to the branching section 32 and the other end to the first branch pipe 33a. When connecting another branch pipe 33, the same procedure can be repeated. A swivel pipe 35 can be provided at the tip of the most distal branch pipe 33 as necessary.

The piping of the pressure vehicle E is connected to the pouring piping 30, and invert concrete is fed from the mixer vehicle D to the pressure vehicle E, and the invert concrete is poured from the pouring piping 30 into the current construction area X. At this time, the invert concrete can be poured simultaneously on both the left and right sides of the branch 32, or poured on only one side. The pouring flow path can be switched and the pouring amount can be adjusted by a valve provided at the branch 32.

When it is desired to change the pouring position in the forward/backward direction within the current construction area X, the length of the straight pipe section 31 is adjusted. Specifically, as shown in Figures 11(a) to (c), the first straight pipe component 31a connected to the branch section 32 is removed from the branch section 32, the trolley 20 is moved backward, and the second straight pipe component 31b is connected to the branch section 32 on the moved trolley 20. At this time, an electric block chain (not shown) or the like can be used to move the trolley 20.

When it is desired to change the pouring position in the forward and backward directions within the current construction area X, the length of the branch pipe 33 is adjusted. Specifically, as shown in Figures 12(a) to (c), the second branch pipe 33b, which is disposed between the first branch pipe 33a held by the branch pipe holder 23b and the branching section 32, is removed from the first branch pipe 33a and the branching section 32. The branch pipe holder 23b is then moved toward the center of the base section 23a, and the first branch pipe 33a held by the moved branch pipe holder 23b is connected to the branching section 32.

Once pouring of the invert concrete in the desired work area has been completed in the above manner, the pouring pipe moving device is removed and cleaned. The same procedure is then followed for the other work areas to complete the invert.

Other Embodiments
In the above embodiment, the pouring pipe 30 has the branch section 32 at the tip of the straight pipe section 31 as an example, but the pouring pipe 30 may have an L-shaped bent pipe at the tip of the straight pipe section 31. In this case, two pouring pipes 30 of the same structure can be arranged side by side, so that invert concrete can be poured from one pouring pipe 30 to the left side and from the other pouring pipe 30 to the right side.

The configuration shown in the above embodiment is one example, and the configuration of the casting system of the present invention can be changed or omitted without departing from the gist of the system.

The conventional method of using a boom-type concrete pump vehicle had the following drawbacks (1) to (5), but these drawbacks can be eliminated by using the pouring system of the present invention.
(1) The boom hit the conveyor belts and air ducts installed inside the tunnel, making it difficult to work and sometimes making it impossible to work depending on the conditions at the site.
(2) A boom-type concrete pump truck was installed on the opposite side of the movable pier, which was moved to one side. However, in order to pour invert concrete on the movable pier side, it was necessary to plan a separate structure to support the pouring piping.
(3) When moving the opposite concrete pipe from the tunnel face to the tunnel mouth, equipment and labor were required to suspend the concrete pouring pipe under the movable pier.
(4) Continuous pouring of concrete was difficult because it was necessary to switch and reconnect the pouring pipes.
(5) Since it was not possible to pour concrete continuously, the pouring work took a long time.

In addition, the conventional method of pouring concrete directly from a concrete mixer truck on a moving pier had the following drawbacks (1) to (4). However, by using the pouring system of the present invention, these drawbacks can be eliminated.
(1) While the invert concrete was being poured, the movable pier was occupied by the concrete mixer truck, so other construction vehicles could not pass through.
(2) Since the invert concrete is generally poured from a height of 1.5 m or more, there was a possibility that the invert concrete would separate.
(3) Since concrete was poured into the movable pier through openings in the beams and floor using a chute, construction defects were likely to occur, such as the concrete not reaching the desired locations.
(4) Since it was not possible to pour concrete continuously, the pouring work took a long time.

The concrete pouring system of the present invention can be used for invert construction of railway tunnels as well as tunnels for vehicles.

LIST OF SYMBOLS 10 Frame 11 Vertical member 12 Horizontal member 13 Rail 14 Support 15 Longitudinal direction movement means 15a Vertical rail 15b Suspension device 15c Support 15d Roller 15e Suspension chain 15f Chain block 15g Hook 20 Cart 21 Placement section 21a Vertical frame 21b Horizontal frame 21c Wheel flange 22 Wheel 23 Horizontal movement mechanism 23a Base section 23b Branch pipe holder 23c Horizontal rail 23d Upper frame 23e Vertical frame 23f Lower frame 24 Lateral movement wheel 25 Reaction force receiving device 26 Flange 30 Pouring pipe 31 Straight pipe section 31a First straight pipe component 31b Second straight pipe component 32 Branch section 33 Branch pipe 33a First branch pipe 33b Second branch pipe 34 Valve 35 Swing pipe A Tunnel B Invert C Mobile pier for tunnel construction (mobile pier)
D Concrete mixer truck (mixer truck)
E Concrete pumping vehicle (pumping vehicle)
F Height adjustment table G Jack H Central passage formwork X Current construction area Y Concrete-cast construction area

Claims (3)

A pouring system for pouring invert concrete,
The concrete pouring device is provided with a pouring pipe connected to a concrete supply device and a pouring pipe moving device used to move the pouring pipe;
As the concrete pouring pipe, one concrete pouring pipe having a branching section branching to the left and right connected to the front of a straight pipe section, or two concrete pouring pipes having an L-shaped bent pipe connected to the front of a straight pipe section,
The straight pipe section is detachably provided at the branch section or at the two bent pipes,
The straight pipe section is configured by detachably connecting a plurality of straight pipe components,
The pouring pipe moving device includes a platform arranged in the tunnel longitudinal direction and a cart having a placement portion on which the pouring pipe is placed,
A part of the casting pipe is placed on the cart of the casting pipe moving device,
The cart can move in the longitudinal direction of the frame with a portion of the pouring pipe placed on the placement section,
The cart is provided with a lateral movement mechanism that moves a part of the casting pipe in a direction intersecting the movement direction of the cart,
A branch pipe is detachably provided at the end of the branching portion or at the end of each of the two bent pipes,
The branch pipe can be moved in a direction intersecting the moving direction of the carriage by the lateral movement mechanism.
A concrete pouring system characterized by: The casting system according to claim 1 ,
The cart can move in the longitudinal direction of the frame while carrying the branch section or the two bent pipes.
A valve is provided at the branched portion or the bent pipe,
By operating the valve, the pouring flow path of the invert concrete can be switched or the pouring amount can be adjusted.
A concrete pouring system characterized by: In the casting system according to claim 1 or 2 ,
A longitudinal direction moving means for moving the frame in the longitudinal direction is provided,
The frame can be moved in the tunnel longitudinal direction by the longitudinal direction moving means.
A concrete pouring system characterized by:

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