JPH0220317Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is a method for coating the outer periphery of the lining segment of a tunnel constructed by the shield method with an impermeable membrane such as vinyl for waterproofing, or for coating the outer periphery of the lining segment of a tunnel constructed by the shield method with an impermeable membrane such as vinyl or a caisson etc. The present invention relates to an impermeable membrane coating device for coating the outer periphery of a structure with an impermeable membrane.

[Conventional technology] To explain the shield construction method as an example, the current shield construction method excavates a tunnel face with a cutter at the front end of a shield excavator, and while holding the face, shield excavation is carried out by the thrust of a shield jack at the rear. The lining is completed by assembling the segments at the rear of the machine, and backfill material is injected into the gap between the lining and the surrounding ground to fill it, but during or after construction, the segment Water often leaks into the tunnel through joints or cracks. For this reason, water leakage prevention work has traditionally been required at the time of or after the completion of shield work, and if groundwater overflows into the void between the segment and the ground, the injection of backfilling material into the tail void may be interrupted by groundwater. Problems such as dilution may occur.

In order to solve this problem, recently, an impermeable membrane made of vinyl, polyethylene, etc. is placed in the gap between the segment and the ground as the shield tunneling machine moves to cover the entire circumference of the segment. is being carried out.

If the entire circumference of the segment is covered with an impermeable membrane and a backing material is filled between the impermeable membrane and the segment, the impermeable membrane prevents groundwater from reaching the outer surface of the segment and prevents the joint of the segment. The problems mentioned above, such as water leakage from the parts, will no longer occur.

A conventional device for covering the outer periphery of a segment with an impermeable film such as vinyl is a shield frame a of a shield excavator, as shown in FIGS. 5 and 6.
A cylindrical impermeable membrane c is folded and stored in the impermeable membrane storage part b on the circumference, as shown in FIG. The impermeable membrane c can be pulled out in a cylindrical shape from the rear end of b along the inner surface of the shield frame a, and as the shield moves forward, the impermeable membrane c is made to be impermeable in the gap (tail void) f between the segment d and the ground e. Membrane c is pulled out to cover the entire circumference of segment d. In the figure, g is a tail seal, h is a shield jack, i is a cutter frame, j is a cutter drive device, k is an erector telescopic jack, l is a mud feeding pipe, and m is a mud draining pipe.

[Problems to be solved by the invention] However, the impermeable membrane c used in the shield construction method must be manufactured into a cylindrical shape before being stored;
When folding this cylindrical impermeable membrane c so as to compress it in the axial direction, it cannot be folded into a lantern shape, but must be folded into a polygonal shape when viewed in the axial direction as shown in Figure 7. There are many problems, such as the inability to fold.

Since the impermeable membrane c is made in advance into a cylindrical shape and then stored in the impermeable membrane storage part b, it is necessary to make the required length of the cylinder each time to match the diameter and length of the location where the impermeable membrane is installed. It takes a lot of effort to make one that corresponds to a variety of sizes.

In the case of a tunnel, the length is approximately 1 km, which makes it difficult to fold the water-impermeable membrane cylinder so that it can be stored in the storage area.

When the cylindrical impermeable membrane c is folded, the seventh
As shown in the figure, since it is folded into a polygonal shape, the thickness n of the water-impermeable membrane housing part b in the inner and outer directions increases accordingly.

As the diameter of the shield frame a increases, the diameter of the cylindrical impermeable membrane c also increases accordingly, making it difficult to fold this large diameter impermeable membrane when storing it in the storage part b. it takes time.

Furthermore, since vinyl or polyethylene is simply used as the water-impermeable membrane c, there are concerns about its strength.

As mentioned above, in the case of a cylindrical impermeable membrane to cover the outer periphery of a segment using the shield method,
Although there are various problems, in the case of impermeable membranes used to cover the outer periphery of structures such as caissons other than tunnel lining using the shield method, there are some made in rectangular tubes other than cylindrical shapes, but segment For example, it is difficult to create a cylindrical impermeable membrane that matches the shape and size of the structure along the outer circumference of the structure, such as a caisson or a caisson. Water-permeable membranes also have the same problems as above.

The present invention can easily store a water-impermeable membrane in the storage part without increasing the thickness of the storage part,
Furthermore, the present invention aims to provide an impermeable membrane coating device that does not take much time to manufacture even if it is long, and that takes on a cylindrical shape when coating the outer periphery of a structure to prevent water from leaking into the structure. It is something to do.

[Means for Solving the Problems] The present invention has a storing part of impermeable membrane bands having a predetermined width in an impermeable membrane storage box, and the adjoining impermeable membrane bands are unrolled so as to overlap each other. A joining device is provided at an even number of locations over the entire circumference, alternately shifted in the front-back or inside-out direction, and for joining together the overlapping portions of the impermeable membrane bands stored in the impermeable membrane band storage portions. , are provided at the outlet end of the impermeable membrane storage box and at the overlap portion of each impermeable membrane band, and furthermore, the front and back sides of the impermeable membrane band are made of composite materials of different materials, and the adjacent storage The front and back sides are arranged in opposite directions.

[Function] The impermeable membranes are stored in strips, and when each impermeable membrane strip is unwound from each storage section, the composite material impermeable membrane strips that are adjacent to each other in the circumferential direction are separated from each other. join. At this time, the materials of the impermeable membranes that meet each other at the joining points are the same, and on-site joining is possible. As a result, the water-impermeable membrane becomes cylindrical when it is coated around the outer periphery of the structure, which prevents water from leaking into the structure.Also, even if a single material lacks breaking strength, it is made of a composite material, which eliminates concerns about strength. It disappears. In addition, when storing in each storage section, each impermeable membrane band is folded, so folding is easy and storage is also easy.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 4 show a case where an embodiment of the present invention is applied to cover the outer periphery of a tunnel lining segment in a shield construction method with an impermeable membrane.

An impermeable membrane storage box 1 is attached to the inside of the shield frame a as shown in Fig. 5, or placed behind the shield frame (not shown) and connected with wires or the like and towed by a shield excavator. is formed into a cylindrical shell shape, and inside the cylindrical shell-shaped impermeable membrane storage box 1, impermeable membrane storage portions for storing a long belt-shaped impermeable membrane band are arranged in a staggered manner in the circumferential direction. to form and place. That is, as shown in FIGS. 1 and 2, the impermeable membrane storage box 1 has an even number of impermeable membrane storage sections 3 and 4 divided in a staggered manner in the circumferential direction, and is located at the front side. The impermeable membrane storage section 3 located on the rear side and the impermeable membrane storage section 4 located on the rear side have width dimensions such that they overlap each other in the front and back direction on both sides in the circumferential direction, and each impermeable membrane storage section 3 ,4
Each impermeable membrane band 2a is formed with an outlet nozzle 5, 6 for the impermeable membrane near the outer periphery of the rear end, and is folded and stored individually in each impermeable membrane storage section 3, 4.
2b is dispensed rearward from each storage section 3, 4 through an outlet nozzle 5, 6. Incidentally, the impermeable membrane zones 2a and 2b are as shown in FIG.
It is a composite material made of material X on one side and material Y different from material X on the other side, and is stored in adjacent storage sections 3 and 4 with the front and back surfaces facing oppositely.
Further, at the rear end of the impermeable membrane storage box 1 and at the rear side of both circumferential sides of each of the rear impermeable membrane storage parts 4, from each of the front and rear impermeable membrane storage parts 3 and 4. A joining device 7 is installed to join the overlapping portions on both sides of the impermeable membrane bands 2a and 2b to be fed out, and the lap portions on both sides are joined by the joining devices 7 to form a cylindrical shape. The formed impermeable membrane 2 is fed out rearward from an impermeable membrane outlet nozzle 8 formed in a ring shape on the outer peripheral side of the rearmost end of the storage box 1.

Note that the bonding device 7 uses an ultrasonic oscillator, a high frequency oscillator, a heater, or the like. Reference numeral 9 indicates an overlap portion, that is, a joint, between the impermeable membrane bands 2a and 2b, 10 indicates a segment, and 11 indicates an impermeable membrane storage box 1.
This is a seal attached to the inner circumferential side of the impermeable membrane storage box 1 to prevent earth and sand from entering and solidifying between the segment 10 and the segment 10.

During shield work, the impermeable membrane is stored in the impermeable membrane storage box 1 in advance. In this case, in the present invention, the impermeable membrane storage parts 3 and 4 are provided inside the impermeable membrane storage box 1 in a staggered manner in the circumferential direction, and each storage part 3 and 4 is provided with a cylindrical impermeable membrane storage part 3 and 4. Impermeable membrane zone 2, which is shaped like a band in the same way as the membrane is divided in the circumferential direction.
A and 2b are stored compactly together.
At this time, since the impermeable membrane is band-shaped when stored, each impermeable membrane band 2a, 2b is Fold it in the longitudinal direction,
Alternatively, it is easy to roll it up, and it is also easy to make it compact and store it in each storage section 3 and 4.

One end of each impermeable membrane band 2a, 2b compactly stored in each impermeable membrane storage section 3 and 4 in the impermeable membrane storage box 1 is connected to an outlet nozzle 5 for each storage section 3, 4. , 6 to the rear, and pass through the outside of the joining device 7 to the rear from the outlet nozzle 8. Adjacent impermeable membrane bands 2a and 2b are arranged so as to overlap each other, and since a joining device 7 is disposed inside the overlap part, each impermeable membrane band 2a and 2b is connected to an outlet nozzle 8.
The overlapping portion is joined by the joining device 7 before being pulled out to the rear.

When all the above preparations are completed, the shield excavator is propelled and the impermeable membranes are sequentially pulled out.
4 includes an impermeable membrane zone 2a that is divided into strips;
2b is stored, the impermeable membrane belt 2 is
The overlap portions 9 of a and 2b are joined together. At this time, the joint surfaces of the impermeable membrane bands 2a and 2b to be joined are always made of the same material Y (or It's getting old. The water-impermeable film coming out of the outlet nozzle 8 becomes the water-impermeable film 2 formed into a cylindrical shape as shown in FIGS. 3 and 4, and can cover the outer periphery of the segment 10. Since the water-impermeable membrane 2 is made of a composite material, there is no need to worry about its strength.

Note that the present invention is not limited to the above embodiments. For example, an impermeable membrane 2 is used to cover the outer periphery of a segment in the shield method.
Although the case where the structure is made into a cylindrical shape is shown, if the structure is a rectangular tube shape such as a caisson, the impermeable membrane storage box 1 may be made into a rectangular tube shape to store the impermeable membrane bands 2a and 2b. , impermeable membrane zones 2a, 2b in the embodiment
It is noted that the number of membranes arranged in the circumferential direction may be other than that shown in the figure, and that although the case where the impermeable membrane storage parts 3 and 4 are alternately shifted back and forth has been shown, it is also possible to shift them in the inner and outer directions. In this case, the storage parts 3 and 4 were provided in eight places in the circumferential direction (the impermeable membrane 2a in Fig. 4,
2b), any even number other than 8 can be selected, and furthermore, the impermeable membrane 2
Of course, any composite material can be used for a and 2b, and various other changes can be made without departing from the gist of the present invention.

[Effects of the invention] As described above, according to the invention, when an impermeable membrane is stored in an impermeable membrane storage box, it is stored as an impermeable membrane band, and in order to cover the structure with the impermeable membrane, the storage box Adjacent water-impermeable membrane bands are joined together to form a cylindrical shape when the structure is pulled out, and the structure is covered with the cylindrical water-impermeable membrane, so that the following excellent effects can be achieved.

(i) When storing the impermeable membrane in the impermeable membrane storage box, operations such as folding it into a compact size are very easy since the impermeable membrane is handled in a band shape, and the storage operation is also easy. .

(ii) Since the impermeable membrane band is folded and stored, the thickness of the storage part can be made thinner than when the cylindrical impermeable membrane is folded and stored as is;
The size of the storage box itself can be reduced.

(iii) Even if the impermeable membrane zone becomes long, it is easy to fold.

(iv) When covering a structure, the water-impermeable membrane can be easily formed into a cylindrical shape to match the external shape of the structure, so it can be applied to structures of any shape.

(v) The impermeable membrane zone can be of a certain width, so its preparation is easy.

(vi) Since a composite material is used for the impermeable membrane zone, strength problems are eliminated.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the impermeable membrane storage box in the device of the present invention, and FIG.
3 is a perspective view showing a state when a segment whose inner diameter is lined is covered, FIG. 4 is a front view showing an example of the impermeable membrane of the present invention, and FIG.
The figure shows an example of a conventional water-impermeable membrane coating device, Figure 6 is an enlarged view showing the main parts of a conventional water-impermeable membrane coating device, and Figure 7 shows a cylindrical impermeable membrane oriented in the axial direction. It is a figure which shows the state folded and stored. 1 is an impermeable membrane storage box, 2 is an impermeable membrane, 2a, 2
Reference numeral b indicates an impermeable membrane zone, 3 and 4 impermeable membrane housing parts, 7 a joining device, 8 an outlet nozzle, 9 an overlap part (joint part), and 10 a segment.

Claims (1)

[Scope of utility model registration request] Inside the impermeable membrane storage box, the impermeable membrane bands with a predetermined width are stored in a storage area that is alternately shifted forward and backward or inward and outward so that adjacent impermeable membrane bands overlap each other and are unrolled. At the outlet end of the impermeable membrane storage box and at each impermeable membrane storage box, a joining device is provided at an even number of locations throughout the impermeable membrane storage box, and is used to join together the overlapping portions of the impermeable membrane bands stored in each of the impermeable membrane storage sections. The impermeable membrane bands are provided at respective overlap positions of the permeable membrane bands, and the impermeable membrane bands are made of a composite material made of different materials on the front and back sides, and the front and back sides are arranged in opposite directions in adjacent storage parts. Water-impermeable membrane coating equipment.