JPH0778360B2 - Spraying method of waterproof layer in frozen section of shield tunnel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for spraying a waterproof layer on a frozen portion of a shield tunnel.

[0002]

2. Description of the Related Art In a waterproofing method for a shield tunnel, a mountain tunnel, etc., a vinyl type waterproof sheet such as EVA is usually attached to the inner surface of the tunnel. However, this method has poor workability because the waterproof sheet was manually attached.
Moreover, when the cross section was large, the seat was bent or distorted, and perfect waterproofing could not be performed.

Further, since this waterproof sheet is replenished and adhered with a predetermined size, there is a problem that the joint portion cannot be completely adhered and water leaks from here. for that reason,
Instead of these, a spraying method for spraying a waterproof sheet has been developed. However, in the freezing method used when joining tunnels in the middle between the shafts on both sides, it is difficult to form the waterproof sheet by the above-mentioned spraying method, so the waterproof sheet is attached in the same manner as above. Was there.

[0004]

However, in the spraying method as described above, since a person holds the spraying device to work, uniform and uniform construction cannot be performed. Further, this construction method still has a problem that not only the workability is bad because the method relies on human power but also the working environment is bad. The present invention has been made in view of the above problems, and an object of the present invention is to implement it in a frozen portion of a shield tunnel.
Shield ton that can improve workability and workability
Provide a method for spraying a waterproof layer on the frozen part of the flannel
Is Rukoto.

[0005]

A waterproof layer in a frozen portion of a shield tunnel of the present invention for solving the above problems
The method of spraying is to join the tunnel in the middle of the shaft.
The shield shield that is in a low temperature due to the freezing of the ground.
Singh inner surface with warm at a predetermined temperature in the heat mat adhered drain material on its inner surface, characterized by spray applying a waterproof layer made of synthetic resin from the top of the drain member
It is to make a structure.

[0006]

[Advantage] According to the present invention, the freezing of the ground keeps it in a low temperature state.
By the periphery of the lever these mounting a heat mat lining plate cutting edge portion and the shield hole of a shield machine to a predetermined temperature, since the waterproof layer made of synthetic resin can be spray construction, construction it is possible to achieve sex, economic efficiency, uniformity of quality, to shorten the 及 beauty construction period.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for spraying a waterproof layer on a frozen portion of a shield tunnel according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, and is a cross-sectional view of a case where a tunnel 1 is joined at an intermediate portion between shafts on both sides. This is, on both sides of the vertical shaft intermediate
The shield machine 2 faces each other, and the cutting edge 3 and
And a shield whose inside is cut and disassembled, leaving part of the partition wall 2b
Only the upper half of the machine 2 is shown. This double section
The outer periphery of the blade 3 freezing soil 4 is formed by freezing tube or the like, the heat insulating material 5 each is filled between the two cutting edges 3 and between the cutting edges 3 and the shield machine steel shell 2a.

[0008] Then, the horizontal portion and the vertical portion of the cutting edge 3,
A heat mat 6 is provided on each partition 2b of the shield machine 2.
Attached, the cutting edge portion 3a lowered by the frozen soil 4
(Peripheral portion of the cutting edge 3) and the partition wall portion 2c (with the cutting edge 3)
The portion between the partition wall 2b) is heated to 15 ° C or higher.
This temperature control is performed within a constant temperature range by attaching a temperature sensor to the frozen soil 4 side of the heat mat 6.

[0009] Then, drain material such as a nonwoven fabric by an adhesive to the lower surface of the heat insulating material 5 and between the heat insulating material 5, and the cutting edge 3 and the steel shells 2a between cutting edge 3 which is heated by these heating mats 6 7 Affix. Then, the spray coating robot 8 sprays a quick-curing polyurethane resin on the drain material 7 to form a waterproof layer 9.

The waterproof layer spraying robot 8 includes a traveling vehicle 10 and
A swing boom 11 and a spray nozzle 12 provided on the traveling vehicle 10.
The swing boom 11 is swung around a rotary shaft 11b by a drive motor 11a, and is swung in the front-rear direction by a cylinder 11c to set an inclination angle, that is, a boom posture is determined.

As shown in FIG. 6, the spray nozzle 12 is composed of a waterproof layer spray nozzle 12a and a cleaning nozzle 12b, and is swung in the front-rear direction by a drive motor 12c to set the spray angle. Together with the optical sensor 12d
The fine adjustment of the spraying distance is performed by. A dust collector 13a including a dust collector 13a and a suction pipe 13b connected to a blower device is provided at the tip of the spray nozzle 12.

In this spraying work, as shown in FIGS. 4 and 5, the spraying coating robot 8 is installed at a predetermined position of one shield machine 2 while the traveling vehicle 10 is allowed to run at a predetermined speed. The swiveling boom 11 is swung at a predetermined swiveling speed, and the quick-setting polyurethane resin is sprayed from the spray nozzle 12. In addition, in order to increase the adhesive force of the fast-curing polyurethane resin, a primer is applied from above the drain material 7.

At this time, the fast-curing polyurethane resin scatters or vaporized gas is generated, but these are absorbed by the dust collector 13 in the spray nozzle 12, and the fast-curing polyurethane resin is purified by the filter. At the same time, the vaporized gas is neutralized and released into the atmosphere, so that a good working environment can be obtained.

Further, the correlation between the self-propelled speed of the traveling vehicle 10 and the swing speed of the swing boom 11, the tilt angle of the swing boom 11, the tilt angle of the spray nozzle 12 and the like depend on the size of the tunnel 1 and the waterproof layer 9. Although it is set in advance according to the thickness and the like, it is of course possible to automatically change it sequentially while spraying according to the state of the object. Further, the injection amount of the fast-curing polyurethane resin is also preset according to the thickness of the waterproof layer 9.

Further, since the spray distance of the spray nozzle 12, the inclination angle, the temperature of the spray material and the spray amount are controlled by the computer in the control room 14, all of them are automatically controlled. The waterproof layer 9 can be applied by spraying.

[0016] Thus, between between cutting edge 3 and cutting edges 3 and the shield machine steel shell 2a becomes what is completely water-shutoff by the automatic application of the waterproof layer 9 by spray coating robot 8. Then, after applying the waterproof layer 9 by spraying, the heat mat 6 is removed and the cast-in-place concrete for the secondary lining is placed.

FIG. 7 shows a second embodiment of the present invention and is a cross-sectional view of a method of constructing a waterproof layer on a vertical shaft and a shield machine mounting portion. Also in this case, as in the first embodiment, the heat mat 6 is attached to the steel shell caisson 16 in the shaft 15 to warm the periphery of the lining attachment plate 17 and the L-shaped steel 18.

Then, a drain material 7 such as a non-woven fabric is adhered from the L-shaped steel 18 to the lining mounting plate 17, and a quick-curing polyurethane resin is sprayed onto the drain material 7 by a spray coating robot 8 for waterproofing. The layer 9 is formed.
The method for spraying the spray coating robot 8 and the waterproof layer 6 is the same as in the first embodiment.

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.

[0020]

EFFECT OF THE INVENTION Seals in a low temperature state due to freezing of the ground
The inner surface of Domashin with warming to a predetermined temperature in the heat mat, by bonded drain material on its inner surface, to spray applying a waterproof layer made of synthetic resin from the top of the drain member, preparative <br/> tunnel inner wear in spray facilities Engineering waterproof layer made of synthetic resin even in the cold state.

Since the waterproof layer made of synthetic resin by spraying can be automatically applied to the inner surface of the tunnel without manual labor, the workability, the economical efficiency and the quality can be made uniform and the construction period can be improved. The work environment can be shortened and the working environment can be improved.

A perfect waterproof treatment can be achieved by sticking a drain material on the inner surface of the tunnel and spraying a waterproof layer made of synthetic resin on the drain material.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a tunnel in the case of joining the tunnel in the middle between shafts on both sides.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of FIG.

FIG. 4 is a side view of the robot for spray coating the waterproof layer.

FIG. 5 is a front view of a spray coating robot for a waterproof layer.

6A and 6B are cross-sectional views of the spray nozzle.

FIG. 7 is a sectional view of a vertical shaft and a shield machine mounting portion.

[Explanation of symbols]

1 Tunnel 2 shield machine 3 cutting edge 4 spray coating robot 9 waterproof layer of frozen soil 5 heat insulating material 6 heat mat 7 Drain material 8 waterproof layer

Claims (1)

[Claims] 1. When joining a tunnel at an intermediate portion between vertical shafts
In addition, the inner surface of the shield machine , which is in a low temperature state due to freezing of the ground, is warmed to a predetermined temperature with a heat mat, a drain material is attached to the inner surface, and a synthetic resin waterproof layer is sprayed on the drain material. A method for spraying a waterproof layer in a frozen portion of a shield tunnel, which is characterized by being constructed.