JPH01116199A - Method of constructing lining - Google Patents

Abstract

PURPOSE: To properly set the moving speed of a moving form by providing a pressure detecting means in a concrete placing space and accurately grasping the placing state in constructing primary lining of a tunnel. CONSTITUTION: Pressure detecting means 20, 20 are sequentially arranged in a concrete placing space 15 at a specified clearance in the placing direction. Signals S1 output from the pressure detecting means 20, 20 on the basis of pressure of placed concrete or mortar are guided to a data collecting device 21 and displayed on a display unit 22. A position in the placing space 15 where concrete or mortar is to be placed is immediately judged, and the moving speed of a moving form of a concrete placing device 1 is adjusted. Therefore, placing work can be smoothly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention relates to a covering suitable for use in constructing a tunnel lining, particularly a method lining, with cast-in-place concrete using a mobile formwork device. Concerning the construction method of the construction.

(b), Prior Art Recently, the construction of tunnel linings, especially the construction of method linings,
Concrete is not sprayed continuously using movable formwork, which solves problems in the working environment due to the generation of dust caused by spraying, and at the same time eliminates the rebound of aggregate that occurs during spraying, making material use more efficient. Many proposals have been made to utilize the system effectively.

In order to meet these demands, the present applicant also filed a patent application in 1986-10 for a concrete pouring device using two suppression rollers.
This is proposed in No. 8369, etc.

(C) 0 Problems to be Solved by the Invention However, using such a mobile formwork device, concrete mortar (herein, ``concrete mortar'' means ``concrete'' or ``mortar''). ), if it is not possible to recognize the position of the poured concrete and mortar in the concrete placement space, it is difficult to set the moving speed of the movable formwork appropriately. Therefore, it is not possible to perform concrete and mortar pouring work smoothly.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a method for constructing a lining that allows the amount of concrete and mortar placed in a concrete placement space to be clearly recognized. .

(d) Means for solving the zero problem, that is, the present invention provides, in the concrete placement space (15),
Pressure detection means (20) whose output signal (Sl) changes depending on the pressure of the concrete mortar (1B) are provided at predetermined intervals in the casting direction of the concrete mortar (16), and the pressure detection means (20) The placement status of the Hunkrete mortar (16) in the concrete placement space (15) is detected from the changing state of the output signal (Sl) from the concrete placement space (15).

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 in the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention provides the pressure detection means (20)
By monitoring the output signal (Sl) from the concrete mortar (16), the concrete placement space (1
5) It functions so that the condition of pouring within can be grasped.

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

Fig. 1 is a diagram showing an example of a lining construction site to which an embodiment of the method for constructing a lining according to the present invention is applied, Fig. 2 is a plan view of the concrete placing device of Fig. 1, The figure shows details of the suppression roller, and FIG. 4 shows an example of a reed switch.

As shown in FIG. 1, the concrete placing device 1 has a frame 2, and two pressure rollers 3. 5 is pivotally supported via pins 2a, 2a. Each pressure roller 3.5 has a blanket 3a13a15a, 5a pivotally supported on the frame 2 about the aforementioned pin 2a, and each blanket 3a, 3a, 5a, 5a has a
It can freely rotate in the directions of arrows A and B around a. A rod-shaped spring 3e is provided between each pair of blankets 3a, 3a and 5a, Sa.

5e is provided to connect the two, and each spring 3e
, 5e are fixed to the frame 2. Also, each blanket 3a, 3g, 5m.

5a has guide plates 3f and 5f, as shown in FIG.
In the left and right direction in the figure, the belt 3c, which will be described later.

5c are provided in pairs in the width direction, and guide bars 3g, 5g are provided between the paired guide plates 3f13f, 5f, 5f to connect them.

Further, three cylindrical rollers 3b, 5b are rotatably supported on each blanket 3a13a, 5a, 5a and frame 2, and between each roller, as shown in FIG. , an auxiliary suppression roller 19 is provided.

The auxiliary suppressing roller 19 is elastically supported by the blanket 3a15a via a coil spring 19b, and a pair of cylindrical auxiliary rollers 19d are rotatably supported by the frame 19C. has been done.

Furthermore, as shown in FIGS. 1 and 3, an endless belt 3C15C made of a flexible material such as rubber is wound between each of the three rollers 3b or 5b. As shown in FIG. 2, guide plates 3f, 3 attached to each bracket 3a, 5a
f and 5f, and is provided between 5f. Furthermore, a fixing plate 6 is fixed to the frame 2 by means not shown between each of the suppressing rollers 3.5, and a concrete/mortar injection pipe 7 is formed at the tip of the fixing plate 6. It is fixed through the injection port.

On the other hand, in the tunnel 10 that is being excavated, as shown in FIG.
2 is the excavation direction of the tunnel 10, that is, arrows C and D in FIG.
They are placed at regular intervals in the direction. In addition, on the surface 11a of the ground 11, as shown in FIGS. 1 and 2, two pieces are placed at − points at a predetermined interval W1 in the direction of arrow E, which is the direction in which concrete and mortar are placed. reed switch 2
As shown in FIG. 4, the reed switch 20 has a flexible case 20a. Inside the case 20a, contacts 20b and 20b are provided facing each other.
i: is connected to 'J-Fm20c. The lead wire 20c of each reed switch 20 is connected to the data collection device 21, as shown in FIG.
A display section 22 such as a display is connected to.

Since the concrete placing device 1 has the above configuration, when constructing a lining for the ground 11 of the tunnel 10 using the concrete placing device 1, the steps shown in FIGS. 1 and 2 are as follows. As shown, each pressure roller 3.5 of the concrete placement device 1 is pressed against the shoring 12.12 with a predetermined pressure. Then, the black nut 3a of each pressure roller 3.5
15a, as shown in FIG.
The rollers 3b and 5b provided at the tip of the bracket 3a15a also move in the A direction. Then, the belts 3c and 5c stretched over the rollers 3b and 5b are also deformed to follow the outer shape of the support 12, and the suppression roller 3.5 comes into close contact with the support 12 via the belts 3c and 5c. In addition, each roller 3b, 5
An auxiliary pressing roller 19 is provided between the rollers 3b and 5b, and the auxiliary pressing roller 19 is pressed in the direction of the arrow H, that is, toward the shoring 12 side between the rollers 3b and 5b. The belt 3c15C is pressed in the H direction by the auxiliary pressure roller 19, and the belt 3c15C is pressed in the H direction by the auxiliary pressure roller 19,
5b, and is held in close contact with the surface of the shoring 12 without loosening.

In this way, when the belts 3c and 5c close the gap between the supports 12.12 installed in the excavation direction of the tunnel 1°, the supports 12.12, the ground 11 and the concrete placing device 1 are closed, as shown in FIG. As a result, a concrete placement space 15 is formed.

In this state, concrete mortar 16 is injected into the concrete placing space 15 from the concrete mortar injection pipe 7, and the concrete placing device 1 is moved to the pressing roller 3.5.
Concrete/mortar 16 is placed while moving it on the shoring 12.12 from the lower part of the tunnel side in the lower part of Figure 1 in the direction of arrow E, that is, toward the top of the tunnel. I will do it. The poured concrete mortar 16 is the same as the concrete mortar 1.
Due to the action of the quick-setting agent added to step 6, it solidifies rapidly, and
The lining 17 is continuously formed in the lower part of the figure.

Note that when the concrete mortar 16 is placed in the concrete placement space 15, the pressure of the placed concrete mortar 16 causes the concrete mortar 1 to
The contacts 20b, 20b of the reed switch 20 disposed at the site where the reed switch 6 is cast are closed, and the signal S1 is transmitted via the lead wire 20c to the data acquisition device 2 as shown in FIG.
1 is output. The data collection device 21 monitors the output status of the signal S1 from the reed switch 20 placed on the ground 11, and displays on the display unit 22 the current position of the concrete/mortar 16. . In addition, as already mentioned, the reed switch 20
The contacts 20b of the reed switch 20 are arranged at intervals W1 on the surface 11a of the reed switch 20 in the direction of arrow E, which is the concrete/mortar placement direction, toward the top of the tunnel.

By monitoring the opening/closing status at each position of 20b, the concrete/mortar placement position can be easily determined. In this way, by understanding the placement position of the concrete mortar 16 in the concrete placement space 15, the moving speed of the concrete placement device 1 in the E direction can be set to an appropriate value depending on the amount of placement. .

In this way, the concrete placing device i11 is moved in the direction of arrow E.
Therefore, the concrete/mortar 16 is injected into the concrete placement space 15 from the concrete/mortar injection pipe 7 while constructing the lining 17 while moving the tunnel 10 toward the top. moves in the E direction, each belt 3c, 5 of the pressure roller 3.5
c also rotates between the rollers 3b, 3b and 5b, 5b and moves on the shoring 12. At this time, since the belts 3c and 5c are pressed against the support 12 side by the auxiliary pressure roller 19, the belts 3C15C remain in close contact with the support 12 without loosening, and each roller 3b, 5b
rotating between.

Furthermore, when the belts 3c and 5c rotate relative to the rollers 3b and 15b, the belts 3c and 5c move relative to the rollers 3b and 5b in the direction of arrow CXD in FIG. Try to move in a misaligned manner. However, the pressure roller 3.5 has a guide plate 3f,
5f is provided on both sides of the belt 3c15c and restricts its movement in the direction of the arrow C1D, so that the belts 3c and 5c do not shift excessively in the C and D directions and are properly aligned with the roller 3b.
, 3b, 5b, and 5b. Also, each of the black rackets 3a, 5a rotates in the direction of arrow A in FIG. arrow G
The guide plates 31, F+(') are moved in the direction of the guide plates 31, F+( to the second power II-('), and the guide plates 3f, 3f facing each other in FIG.

Since guide rods 3g and 15g are installed between 5f and 5f, excessive movement of belts 3c and 5c in the direction of arrow G is regulated, and belts 3c and 15C are placed between rollers 3b and 5 during driving work.
It is done smoothly without falling off from b.

In addition, the lining 1 is installed on the ground 11 on the opposite side of the tunnel 10.
7, move the concrete placing device 1 in the direction of arrow E in FIG. In this state, concrete mortar 16 is poured in the same manner as shown in FIG. 1 with the suppression roller 3 facing down.

In addition, in the above-mentioned embodiment, two auxiliary suppression rollers 19 are used.
Although we have described the case in which the frame 19C is provided with several auxiliary rollers 19d, any belt suppressing means such as the auxiliary suppressing roller 19 can be used as long as it can press the belts 3c and 5c toward the shoring 12. Of course, it may also be a configuration.

Further, in the above-described embodiment, the reed switch 2 is attached to the earth 11.
We have described the case where an electrical switching means is provided in which the contacts 20b, 20b open and close due to the pressure of the concrete/mortar 16 placed in the concrete placement space 15 such as 0, etc., but the detection of concrete/mortar can be done using the electrical switching means Not limited to , the output signal S at the pressure of concrete/mortar 16
Of course, any device such as a pressure sensitive element may be used as long as 1 changes.

In addition, in the above embodiment, the present invention is implemented using two suppression rollers 3.
．． 5 has been described, the case is applied when constructing the lining 17 using a movable formwork device such as the concrete placing device 1 having a concrete placement device 1, but the above-mentioned type of movable formwork device to which the present invention is applied has been described. Of course, the present invention is not limited to this, and it is also possible to use one pressure roller, one having three or more pressure rollers, and even any type of pressure roller without a pressure roller.

(g) 0 Effects of the Invention As explained above, according to the present invention, the output of the reed switch 20 etc. by the pressure of the concrete/mortar 16 in the concrete placement space 15 such as the surface 11a of the ground 11. Pressure detection means whose signal S1 changes are provided at predetermined intervals W1 in the casting direction of the concrete mortar 16,
Since the configuration is configured such that the placement status of the concrete/mortar 16 in the concrete placement space 15 is detected from the change state of the output signal S1 from the pressure detection means, the concrete/mortar 16 is detected in the concrete placement space 15. It is possible to immediately determine the current position of concrete pouring, and based on this, concrete pouring equipment 1
The moving speed of the movable formwork such as
It becomes possible to set the setting appropriately according to the amount of concrete/mortar 16 in the container, and smooth concrete/mortar placing work becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a lining construction site to which an embodiment of the lining construction method according to the present invention is applied, Fig. 2 is a plan view of the concrete pouring device shown in Fig. 1, and Fig. 3 is a FIG. 4 is a diagram showing details of the suppression roller, and FIG. 4 is a diagram showing an example of a reed switch. 1... Mobile formwork device (concrete placement device)
10...Tunnel 11...Mound 11a...Surface 15...Concrete placement space 16...Concrete mortar 17...
・Lining 20...Pressure detection means (reed switch) Sl・
... Output signal applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji (and 2 others)

Claims (1)

[Claims] A movable formwork device is moved along the surface of the ground toward the top of the tunnel, and concrete and mortar are placed in the concrete placement space formed between the movable formwork device and the ground. In the lining construction method, in which the lining is constructed by placing a
A lining provided at predetermined intervals in the concrete/mortar casting direction, and configured to detect the concrete/mortar placement situation in the concrete placement space from the change state of the output signal from the pressure detection means. How to build.