JPS62264296A - Concrete placing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of Application The present invention is applicable to tunnel lining, particularly when forming tunnel lining with cast-in-place concrete using movable formwork. The present invention relates to a suitable concrete placement device.

(b), Conventional technology Recently, construction of linings in tunnels, especially method linings, has been carried out continuously using movable forms rather than by spraying concrete, and the spraying generates dust. Many embankment plans have been developed to solve the occupational health problems caused by spraying, and at the same time to eliminate the rebound of aggregate that occurs during spraying, thereby making efficient use of materials.

(C) 9 Problems to be Solved by the Invention However, when using a movable formwork, it is necessary to prevent poured concrete from leaking out from the sides of the formwork. Concrete is less commonly used in the construction of linings.

There will be inconvenience that materials will be wasted and economical construction will not be possible.

Conventionally, such devices have only been provided with flat plate-shaped rubber stoppers on the sides of the formwork. Therefore, depending on the condition of the ground, gaps tend to form between the end stop and the ground, and the end stop cannot fully function as a end stop.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a concrete pouring device that can effectively prevent poured concrete from leaking to the outside.

(d) Means for solving the zero problem, that is, the present invention provides links (22a ) connected endlessly to end stopper belt (22)
It is constructed by providing a fastening device (19) which is made of a tensioned material.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. The following r te+
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention provides an end stop belt (22).
The link (22a) can be in surface contact with the ground (27), so the concrete (25) is the link (22a).
The frictional force and viscous force acting between 22a) and the ground (27) act to prevent leakage to the outside.

(f), Example Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a side view showing an embodiment of the concrete placing apparatus according to the present invention, Fig. 2 is a plan view of the concrete placing apparatus shown in Fig. 1, and Fig. 3 is a front view of the concrete placing apparatus shown in Fig. 1. Figures 4 and 5 are process diagrams for constructing a tunnel lining using the concrete placing device according to the present invention, and Figure 6 shows the state between the end stop belt link and the ground. FIG.

As shown in FIGS. 1 to 3, the concrete placing device 1 has a frame 2, and the frame 2 includes a third
As shown in the figure, two support shafts 3.3 are provided in parallel. Each support shaft 3.3 has a pressing belt device 5A.
, 5. Each pressing belt device 5 has two roller assemblies 6 supported by the support shaft 3 (therefore, there are four roller assemblies 6 in the entire concrete placing device 1).

The roller assemblies 6.6 in each pressing belt device 5 are arranged 1. Arranged in parallel, each roller assembly 6 has a pair of pulleys 7.7 rotatably supported. Further, an endless belt 9 made of a flexible material such as rubber is wound around the two roller assemblies 6.6 in each pressing belt device 5 via a pulley 7. . Furthermore, the width Wl+ of the belt 9 is
It is formed larger than the installation interval W2 of the support 11 made of H-beam steel or the like of the tunnel 10.

Further, between the pressing belt device 55 of the frame 2,
A concrete supply pipe 12 having a nozzle 14 attached to its tip is connected to the center of FIG. 3, and a quick setting material injection pipe 13 is connected to the tip of the concrete supply pipe 12. Furthermore, as shown in FIG.
5.15 are provided, and each seat support device 15 is
A pair of brackets 1 with one end fixed to the frame 2
5n and 15a are provided. Each bragglet 1-15
A groove 15b is formed on the concrete supply pipe 12 side of the sheet support device 15.
As shown in FIGS. 1 and 2, a sheet roll 16 in the form of a band-shaped sheet wound into a roll has a shaft 16a of the sheet roll 16 rotatably fitted into a groove 15b. Supported.

From the sheet roll 16, the sheet 17 formed in the above-mentioned band shape is installed so as to wrap around the pressing bell (1/bell)-9 of the device 5 shown in the lower part of FIG. The right side of the belt 9 in FIG. 1, that is, the concrete pouring side, is extended along the belt 9 downward in the figure.

By the way, a stopping device 19 is provided on the left side of the frame 2 in FIG. 2, that is, on the face side during concrete pouring, and the end stopping device 19 is provided on the left side of the frame 2 in FIG. Arms 20120 are rotatably supported at two positions above and below the attached shaft member 2a in the figure. A roller 21 is rotatably supported on each arm 20, and an end stopper belt 22 is wound between the rollers 21 and 21. As shown in FIGS. 1 and 2, the end stopper belt 22 includes a rubber link 2 having an L-shaped cross section.
A plurality of 2a are connected in an endless manner. On the other hand, each arm 20 is provided with a tube 20a, as shown in FIG. They are slidably engaged in the ASB direction. Cylinder 20a
.

A coil spring 23 is compressed between 2b, and the arm 20 receives a rotational force in the direction of arrow C about the shaft member 2a.

Since the concrete placing device 1 has the above-described configuration, when constructing the primary lining for Tg cutting of the tunnel 10, the concrete placing device 1 is attached to an appropriate operating means such as a power shovel. In this state, the belt 9 of the pressing belt device 5 is pressed between the supports 11 and 11 installed at the interval W2 as shown in FIG. 3 on the tunnel lower side surface 10a shown in FIG. Position and set using the shape. At this time, as shown in FIG. 1, the sheet roll 16 is attached to the bracket 15a of the sheet support device 15 located below the concrete placement device 1 via the groove 15b, and the sheet 17 is removed from the sheet roll 16. It is unrolled and, as shown in FIG. 1, the wrapping is installed on the pressing belt device 5 at the lower part of the figure as described above. Then, the gap between the supports 11 and 11 (distance W2) is closed by the belt with the width W1 via the sheet 17 (Wl>W2), and the gap between the supports 1
Between 1.11 and the ground 27 and concrete placement equipment 1,
As shown in Figure 2, rectangular concrete placement space 2
9 is formed.

In this state, concrete 1 is poured from the concrete supply pipe 12.
Conc. J-1-25 is injected into the concrete placement space 29. As shown in FIG. 1, the poured concrete 25 is filled from the bottom to the top of the concrete placement space 29 due to its own weight, and the filled concrete 25 is pushed to the ground 27 side by the pressing belt device 5A. As a result, the concrete is held in good condition in the concrete casting space 29 between the supports 11.11.

At this time, the roller assembly 6 of each pressing belt device 5A, 5 is driven to rotate the belt 9 in the direction of the arrow. At the same time, the entire concrete placing device 1 is moved along the shoring 11 in the direction of arrow E, that is, upward in the figure, at a predetermined speed. At this time, the relationship between the moving speed V of the driving device 1 and the moving speed vA1vB of the belt 9.9 in each pressing belt device 5.5 is v,=v.

■Akuv.

shall be.

That is, the speed VA of the pressing belt device 5A is equal to the moving speed V of the concrete pouring device N1 (however, the direction is opposite), and therefore the concrete placed in the concrete placing space 29 and the belt of the pressing belt group M5A are 9,
There is no relative speed difference between the seas 1-17 on the belt 9, so the sea! -17 and the belt 9 can maintain a stationary state with respect to the concrete, so the poured concrete is free from harmful vibrations and disturbances despite the movement of the concrete pouring device 1 in the E direction. The solidification of poured concrete is carried out smoothly. Note that since the sheet 17 is interposed between the belt 9 and the concrete 25, the belt 9 and the concrete 25 do not come into direct contact with each other. The detachment operation between the belt 9 and the concrete 25 at the pulley 7 portion is performed smoothly while preventing the occurrence of a situation where the surface of the concrete that has started to solidify is scraped off.

Further, the pressing belt device 5. The belt 9 is rotated in the direction of the arrow at a speed ■8 faster than the moving speed of the concrete placing device 1, so that the concrete placing space 29
The belt 9 of the pressing belt device 5 moves in the direction of the arrow E against the concrete placed in the concrete placement space 29, despite the movement of the concrete placement device 1 in the direction of the arrow E. , the concrete 25 poured above the nozzle 14 position shown in FIG. 1 in the direction of the arrow,
That is, it plays the role of pressing down in the direction of the pressing belt device 5A and compacting the concrete 25 in the pressing belt device 5A portion.

In this way, as shown in FIG. 4, the concrete pouring device 1 is gradually moved in the E direction from the lower side part 10a of the tunnel 10, and the concrete 25 is continuously poured from the nozzle 14 into the concrete pouring space. 29 (and later, the lining 30 is constructed. In this way,
When the lining 30 is constructed up to the tunnel top end 10b shown in FIG. 4, the supply of concrete 25 via the concrete supply pipe 12 is temporarily stopped at that point. Next, the concrete placing device 1 is rotated in the direction of the arrow F in FIG. Construction of lining 30 will resume from this point. At this time, the positional relationship between the pressing belt devices 5A1 and 5B is opposite to that when constructing the right side of the tunnel 10, so this time, the sheet roll 1
6 is attached to the sheet support device 15 on the side of the pressing belt device 5B, and the pressing belt device 5. The moving speed of the belt 9 is made equal to the moving speed of the concrete placing device 1, and the belt 9 of the pressing belt device 5A on the upper side, that is, on the tunnel top end 10b side.
Concrete is compacted by making the moving speed of the concrete placement device 1 faster than the moving speed of the concrete placing device 1. In addition, since the pressing belt device 5A15 and the sheet support device 15.15 are arranged symmetrically on the tunnel top end 10b side and the lower side surface portions 10a and 10c side with the nozzle 14 in between,
The concrete pouring operation can be completed by simply moving the concrete placing device 1 in the F direction, and there is no need to perform complicated operations such as changing the arrangement of the stopper device 19 and the nozzle 14.

As for the ground 27 on the left side of Figure 4, concrete is poured and a lining 30 is constructed in the same manner as described above, and as shown in Figure 5, the top part is finally 10b, the linings 3o on both sides are made continuous to construct an integral lining 30, but even in this case, the nozzle 14 that supplies the concrete 25 to the concrete placement space 29 is connected to the frame 2.
Since it is placed in the center of the top end 10b, it is possible to smoothly pour concrete into the top end 10b without using any special attachments or work processes. 5. Pressing belt devices 5A on both sides of the nozzle 14 until the placed concrete solidifies to the extent that it can stand on its own. It is supported without falling downward.

In addition, when pouring concrete using the concrete pouring device 1,
Usually, as shown in FIG. 2, the entrance side of the tunnel 10 (
Since the lining 30 has already been constructed on the right side of the figure, the concrete poured in the concrete placement space 29 will not leak out from this part, but the face side (
On the left side of the figure, the ground 27 is exposed, so the shoring 1
Concrete U cast from the gap 31 between 1 and the ground 27
- There is a risk that 1.25 will leak outside.

However, when the concrete placing device 1 presses the pressing belt device 5 between the supports 11 and 11 to form the concrete placement space 29, the end stop of the end stop device 19 installed on the left side in FIG. The belt 22 comes into contact with the ground 27 in a pressed manner. The rollers 21 and 21 of the end stop belt 22 are given a rotational force by the coil spring 23 in the direction C in FIG. contact with pressure. Furthermore, as described above, the end stopper belt 22 is formed from the links 22a having a cross-sectional shape, so that the ground 27 and the links 22a are formed by bending the links 22a having the width W3, as shown in FIG. It contacts the ground 27 at the portion 22b. Therefore, concrete 25 is placed in the concrete placement space 29, and a part of it is placed between the shoring 11 and the ground 2.
Even if it tries to leak to the left in FIG. 2 through the gap 31 between the end stopper belt 22 and the stopper belt 22, the link 22a of the end stopper belt 22 prevents the leakage. That is, since each link 22a has an L-shaped cross section as shown in FIG.
c and bent portion 22b effectively prevent concrete 25 from leaking.

In particular, since the bent part 22b is in surface contact with the ground 27 over the width W3, even if there is some gap between the ground 27 and the bent part 22b (normally, the ground 27 part is (Since there are irregularities, there will always be a gap), the concrete 25 is in the middle of the bending part 22b, and the concrete 25 and the concrete 2
5 and the viscous force of the concrete itself prevents its leakage. In addition, the wife stopper belt 2
2 is formed in the shape of a conveyor as shown in FIG. The installed concrete 25 is prevented from leaking to the outside.

Furthermore, as the pouring device 1 moves in the E direction, the belt 22 is rotated between the rollers 21 and 21 by the g rod acting between the ground 27 and the belt 22, and the concrete 25 is constantly poured and placed. This prevents the concrete 25 from leaking in the areas where the concrete 25 is exposed.

The driving method for the belt 22 may be mechanical driving using a morph or the like, in addition to driving by contact friction with the earth 27 as in this embodiment.

In addition, in the above-mentioned embodiment, the link 22 of the stopper belt 22
Although we have described the case where the cross section of a is L-shaped, link 22
The cross section of a is not limited to an L-shape, but may be of any shape, such as a U-shape, as long as it can face the ground 27 face-to-face.

(g) 0 Effects of the Invention As explained above, according to the present invention, the frame 2 is provided with an endless link 22a having an L-shaped or U-shaped cross-sectional shape that can face the ground 27. Since the construction includes the end stop device 19 which is formed by stretching the connected end stop belts 22, leakage of the poured concrete to the outside will reduce the friction that acts between the link 22a, the ground 27 and the concrete 25. This is effectively prevented by the force and the viscous force of concrete, and the poured concrete 25 is not wasted, making it possible to perform economical construction.

In addition, various modifications and applications can be considered for the configuration of the pressing belt device 5 etc. mounted on the frame 2, and the arrangement of the nozzle 14 etc. The present invention is applicable to all concrete placing apparatuses 1 having an end stop device 19 provided with an end stop belt 22, regardless of such changes in configuration.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the concrete placing apparatus according to the present invention, Fig. 2 is a plan view of the concrete placing apparatus shown in Fig. 1, and Fig. 3 is a front view of the concrete placing apparatus shown in Fig. 1. Figures 4 and 5 are process diagrams for constructing an L-channel lining using the concrete placing device according to the present invention, and Figure 6 is a diagram showing the process of constructing an L-channel lining using the concrete placing device according to the present invention. It is an enlarged view showing the situation. 1...Concrete placement device 2...Frame 5...Pushing means (pushing belt device) 14
... Injection means (nozzle) 19 ... End stop device 22 ... End stop belt 22a ... - Link Fig. 1) E-Eto Fig. 3 0b

Claims (1)

[Scope of Claims] A concrete placing device having a frame provided with a means for pressing poured concrete, the frame having an endless link having a cross-sectional shape that can face the ground face-to-face. A concrete pouring device equipped with an end stop device made by stretching connected end stop belts.