JPH06117196A - Method for constructing shield tunnel - Google Patents

Abstract

PURPOSE:To construct a tunnel effectively and economically in a short time, to stick an even and homogeneous waterproof layer automatically without depending on man power and to improve working conditions in a shaft of the tunnel. CONSTITUTION:A waterproof layer 9 is put on the inner surfaces of segments lined primarily, by spraying by a spraying nozzle 4 while a waterproof layer- spraying robot 1 is being self-propelled by a traveling car 2 and while a turning boom 3 is being turned at a fixed speed of turning, as a shield machine is advanced for excavation. After that, the waterproof layer 9 is secondarily lined with concrete cast in site and a shield tunnel 8 is constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for a shield tunnel.

[0002]

2. Description of the Related Art In recent years, a shield construction method has come to be used instead of an excavation construction method for constructing a subway or an underground passage in an urban area. As a waterproofing method in this shield construction method, a vinyl-based waterproof sheet such as EVA is attached to the inner surface of the segment of the primary lining and then the secondary lining is constructed to construct a shield tunnel.

However, since the above-mentioned waterproof sheet is pasted with a predetermined size while being manually added, the workability is poor, and when the cross section is large, the waterproof sheet is bent or distorted, which is perfect. Waterproof construction was not possible. Furthermore, since the joint portion of this waterproof sheet cannot be completely adhered, there is a problem that water leaks from here. for that reason,
Instead of this, a spraying method was developed in which a waterproof sheet was sprayed. By this method, the waterproof sheet was sprayed on the inner surface of the segment of the primary lining and then the secondary lining was performed to construct a shield tunnel.

[0004]

However, in the construction method of the shield tunnel as described above, since a person sprays the waterproof sheet with a spraying device, it is possible to perform uniform and uniform spraying of the waterproof sheet. In addition to being unable to do this, there was the problem that work efficiency was poor because it relied on human power, and the work environment inside the tunnel mine was also poor. The present invention has been made in view of the above problems, and its purpose is to
The objective is to construct a tunnel efficiently and economically in a short period of time, to automatically apply a uniform and homogeneous waterproof sheet without relying on human power, and to improve the working environment inside the tunnel.

[0005]

The construction of the shield tunnel according to the present invention for achieving the above objects is summarized as follows: a traveling vehicle, a spray nozzle equipped with a dust collecting device at the tip, and a swirling nozzle for the spray nozzle. A robot for spraying a waterproof layer consisting of a swing boom for making a secondary lining after spraying a waterproof layer made of a synthetic resin on the inner surface of a segment which has been primary covered by a shield machine.

[0006]

According to the present invention, a waterproof layer made of synthetic resin can be automatically sprayed on the inner surface of the segment of the primary lining by the waterproof layer spraying robot, so that the construction period can be shortened. Since a shield tunnel can be constructed efficiently and economically, and a waterproof layer can be automatically sprayed, the working environment in the tunnel pit can be improved and a uniform and uniform waterproof layer can be created. Can be installed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a shield tunnel construction method of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a side view of a waterproof layer spraying robot 1 according to the present invention, which comprises a traveling vehicle 2, a swing boom 3 provided on the traveling vehicle 2, and a spray nozzle 4.

The traveling vehicle 2 is of a gate type having two pairs of driving wheels 2a and a pair of direction changing wheels 2b. The operation of the traveling vehicle 2 is controlled by a computer in the control room 2c.
The proximity sensor 2d provided in the vicinity of a and 2b avoids obstacles and travels.

The swing boom 3 is provided with a spray nozzle 4 at its tip, and the drive motor 3a swings about a rotary shaft 3b, and the cylinder 3c swings back and forth to set the tilt angle of the swing boom 3, that is, The boom attitude is determined. In addition, the swing boom 3 is formed to be vertically expandable and contractible,
By vertically expanding and contracting, the spraying distance to the segment 5 is adjusted.

The spray nozzle 4 is, as shown in FIG.
It is composed of a waterproof layer spray nozzle 4a and a cleaning nozzle 4b connected to the spray device 6, and is swung in the front-back direction by the drive motor 4c to set the spray angle. Fine adjustment of the spraying distance is performed. Further, as shown in FIG. 5, a dust collector 7 including a dust collector 7a and a suction pipe 7b connected to a blower device is provided at the tip of the spray nozzle 4.

The construction method of a shield tunnel using the waterproof layer spraying robot 1 will be described below. FIG. 2 shows a cross-sectional view of the shield tunnel 8 which is primarily covered by a shield machine (not shown).
The waterproof layer spraying robot 1 is self-propelled by the traveling vehicle 2 as the shield machine is dug, and the swivel boom 3 is swung at a predetermined swirling speed, and the waterproof layer 9 is sprayed on the inner surface of the segment 5 by the spray nozzles 4. It is to be attached.

In this spraying, the cleaning nozzle 4b is used to clean the dew condensation on the inner surface of the segment 5 and the drain material 10 is adhered thereto, and then the quick-setting polyurethane resin 11 is sprayed from the spray nozzle 4a for the waterproof layer. It is a thing. In addition, in order to improve the adhesiveness of the fast-curing polyurethane resin 11, a primer is sprayed and applied onto the drain material 10.

As shown in FIG. 6, the fast-curing polyurethane resin 11 comprises a polyether polyol main material 11a heated to 15 ° C. by a spraying device 6 and an isocyanate prepolymer as a main component. The curing agent 11b is mixed and formed at the tip of the waterproof layer spray nozzle 4a.

Further, during this spraying, the fast-curing polyurethane resin 11 scatters or vaporized gas is generated. These are collected by the dust collector 7a of the dust collector 7 shown in FIG. By being absorbed by the suction pipe 7b, the fast-curing polyurethane resin 11 is purified by the filter, and the vaporized gas is neutralized and released into the atmosphere, so that the environment inside the tunnel pit can be improved.

Correlation between the self-propelled speed of the traveling vehicle 2 and the turning speed of the turning boom 3, the turning boom 3 and the spray nozzle 4
Of the spray angle of the spray nozzle 4, the spray distance of the spray nozzle 4, the temperature of the spray material in the spray device 6 and the spray amount, and their mutual operating relationships are all managed by the computer in the control room 2c, so that they can be automatically performed without human intervention. The waterproof layer 9 can be applied by spraying.

Further, these are preset according to the size of the shield tunnel 8 and the thickness of the waterproof layer 9, but of course they can be automatically changed while spraying according to the condition of the object. . Further, the injection amount of the fast-curing polyurethane resin 11 is also preset according to the thickness of the waterproof layer 9.

As described above, after the waterproof layer 9 is formed on the inner surface of the segment 5 of the primary lining as the shield machine is dug, the secondary lining with the cast-in-place concrete 12 is applied to completely stop the waterproof layer 9. A flooded shield tunnel 8 is constructed.

Further, the present invention is not limited to the above-mentioned embodiments, but can be appropriately modified without departing from the spirit of the invention.

[0019]

EFFECT OF THE INVENTION A waterproof layer spraying robot comprising a traveling vehicle, a spraying nozzle having a dust collecting device at its tip, and a swinging boom for swinging the spraying nozzle, the inner surface of a segment which is primarily covered by a shield machine. By spraying the waterproof layer made of synthetic resin on the first and then performing the secondary lining, the shield tunnel can be constructed efficiently in a short period of time and economically.

Since the waterproof layer made of synthetic resin by spraying can be automatically sprayed on the inner surface of the segment of the primary lining without manual effort, the waterproof layer can be made uniform and uniform. Therefore, workability can be improved.

The dust collecting device at the tip of the spray nozzle can absorb the rapid-curing polyurethane resin and vaporized gas that are scattered when spraying the waterproof layer, so that the working environment can be improved.

Since a uniform and uniform waterproof layer made of synthetic resin having no joint can be sprayed on, a perfect waterproof treatment can be carried out.

[Brief description of drawings]

FIG. 1 is a side view of a waterproof layer spraying robot.

FIG. 2 is a vertical cross-sectional view showing a state in which a waterproof layer is sprayed by a waterproof layer spraying robot.

3 is a sectional view taken along the line aa of FIG.

FIG. 4 is a sectional view of a spray nozzle.

FIG. 5 is a sectional view of a spray nozzle.

FIG. 6 is a schematic view of a spraying device.

FIG. 7 is a sectional view of a shield tunnel.

[Explanation of symbols]

 1 Waterproof layer spraying robot 2 Running vehicle 3 Swing boom 4 Spraying nozzle 5 Segment 6 Spraying device 7 Dust collector 8 Tunnel 9 Waterproof layer 10 Drain material 11 Fast-curing polyurethane resin 12 Concrete

Claims (1)

[Claims] 1. A waterproof layer spraying robot comprising a traveling vehicle, a spray nozzle having a dust collecting device at its tip, and a swivel boom for swiveling the spray nozzle, wherein the inner surface of a segment is lined with a shield machine. A method for constructing a shield tunnel, characterized in that after a waterproof layer made of synthetic resin has been sprayed on, a secondary lining is carried out.