JPS58199996A - Method and apparatus for supporting soil sheathing - 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 The second invention relates to a method and an apparatus for supporting a retaining cylinder consisting of a large number of segments in a tunnel excavated by the shield method.

Conventionally, as a method for supporting earth retaining cylinders, there is a method of filling mortar, but this method has the disadvantage that it takes a long time for the mortar to become gorged after pouring, and the mortar remains fluid during that time, causing it to flow out. For the second reason, in recent years, a method of injecting hard foamed resin between the retaining cylinder and the tunnel has been developed, and it has achieved some results.

However, even if the second hard foamed resin is injected, these foamed resins may spread and harden around the outer periphery of the retaining tube to completely support the retaining tube.

Due to various conditions, ie, the influence of water, etc., a considerable amount of the foamed resin flowed out or got into the crevices of the tunnel, making it impossible to support it even though a considerable amount was used.

Therefore, the present invention provides a method and apparatus for reliably supporting the earth retaining cylinder.

The gist is that an annular tube is inserted into the outside of a soil retaining cylinder made up of segments, a piece to be clamped formed on the outer periphery of the tube is interposed between the segments, and then the tube is inserted into a hole in the segment. A method for supporting an earth retaining cylinder, in which a filler is injected through an injection port to inflate the tube to support the earth retaining cylinder.

This is a support device for a retaining cylinder in which an injection port is provided inside an annular tube and a clamped piece is formed on the outer periphery.

Embodiments of the present invention will be described below with reference to the drawings.

1 is a shield tunneling machine, with a cutter 3 in front across the bulkhead 2.
The cutter 3 is rotated by the rotational force from the prime mover 4 via the rotating shaft 5, and excavation is performed.

The shield excavator 1 excavates and moves forward while being pressed by the shield jack 6, and after a certain amount of forward movement, the segment 7 is inserted first and is connected to the earth retaining tube 8. Inherited, retaining pipe 8
will increase in size and shielding work will be carried out.

The earth retaining tube 8 is a tunnel 2 formed by the shield excavator 1.
The diameter of the earth retaining tube 8 is larger than the diameter of the earth retaining tube 8, which is made up of a large number of segments 7. Therefore, there is a gap between the earth retaining tube 8 and the tunnel, and water usually accumulates in between. tIi
The earth retaining tube 8 is in a state where it appears to be floating within the tunnel. For the second purpose, the retaining tube 8 is supported by the following means.

In order to support the earth retaining tube 8, an annular tube 10 as shown in FIG. 3 is required. The tube 10 is made of cloth, rubber, resin, etc., has an inner diameter approximately equal to the outer diameter of the retaining cylinder 8, and is provided with an injection port 11 into which a filler is injected. A clamped piece 12 is formed on one side of the second tube IO over the entire circumference.

Note that the filler filled in the tube IO includes mortar, hard foamed resin, and the like.

Next, to explain the actual supporting method using the second tube 10, first, as shown in FIG.
It fits into the outer periphery of the retaining tube 8, which is made up of the segment closest to the seal excavator l. At this time, the clamped piece 12 is placed on one joint surface of the segment, and the injection port 11 is inserted into the hole 13 formed in the segment 7 and held there.

When the segments are added, the clamped piece 12 is interposed and fixed between the segments, and as the shield tunneling machine l excavates, the tube 10 is brought out into the tunnel 20 and placed at an appropriate location. , cement from the injection port 11,
Filler such as hard foam resin is injected into the tube IO.
The earth retainer 548 can be fixed by inflating it and bringing it into close contact with the tunnel.

The filling material flows inside the tube and reliably covers the area around the earth retaining cylinder 8, and also solidifies to ensure reliable support.

In addition, as in the example, the part supported by the tube is 1.
The gap is about 0m, but it can be changed as appropriate depending on the condition of the tunnel, and if necessary, if filling material is later put in the gap between the tubes, the tubes will prevent leakage, so it is reliable. Filling is also possible.

As described above, according to the second invention, by injecting the filler into the tube using a tube, the filler does not flow out and reliably goes around the outside of the retaining cylinder, and the tube is placed on the shaft surface. It can be firmly supported and fixed in close contact with the

Since only the capacity of the tube is required for the filler, the amount used also has the effect of significantly reducing the amount used compared to conventional ones.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the state of use of this invention;
The figure is a sectional view of the main part, and FIG. 3 is a perspective view of the annular tube. 1... Shield tunneling machine, 7... Segment, 8...
・Earth retaining tube, lO... Annular tube, 11... Inlet, 12... Clamped piece, 13... Segment hole. Patent applicant Kiyoko Hayabe Figure 2 Figure 3 0 Procedural amendment (Chief of the Ship's Patent Office Shima 1) Haruki Tono 1, Indication of the case 1981 Patent application No. 3L060 2, Name of the invention Support method and device 3, and its relationship to the case of the person making the amendment Patent applicant address: 1-16-5 Nagao, Tama-ku, Yozaki City, Kanagawa Prefecture Name: Kiyoko Hayabe 4, Agent 6, Details subject to Supplementary + E Document 1. Name of the invention: Method and device for supporting earth retaining cylinders 2. Claim 1: An annular tube is inserted outside the earth retaining part made up of segments, and a piece to be clamped formed on the outer periphery of the tube is inserted between the segments. After intervening and fixing, filler is injected from the injection port of the tube inserted into the hole of the segment to inflate the tube to support the earth retaining cylinder and completely block the gap between the front and rear of the tube. A method for supporting a retaining tube, characterized in that: 2. A support device for a retaining tube, characterized in that an injection port is provided inside the @-shaped tube, and a piece to be held is formed on the outer periphery. 3. Detailed Description of the Invention The second invention relates to a seal, a method for supporting a retaining cylinder consisting of a large number of segments in a mine shaft (1) excavated by a construction method, and a method for blocking gaps. Conventionally, there is a method of supporting the earth retaining cylinder by filling it with mortar, etc., but since the gap passes through the outer periphery of the excavator and continues to the cutting edge of the cutting blade, the mortar wraps around this part and hardens. This often interfered with subsequent work. In order to prevent this, it is necessary to completely block off the gaps from front to back in advance. For this reason, various methods have been considered in recent years, but none of the methods has achieved a complete blocking effect. Therefore, the second invention provides a method and device for reliably supporting the earth retaining tube and perfecting the blocking effect. At the same time, a clamped piece formed on the outer periphery of the tube is interposed and fixed between the segments, and then a filler is injected from the injection port of the tube inserted into the hole of the segment to inflate the tube and retain the earth. The present invention provides a method for supporting a retaining tube that supports a tube, and a supporting device for a retaining tube in which an injection port is provided inside an annular tube and a clamped piece is formed on the outer periphery. Embodiments of the present invention will be described below with reference to the drawings. l is a shield tunneling machine with a cutter 3 in front across the bulkhead 2.
is arranged, and the cutter 3 is rotated by the rotational force from the prime mover 4 via the rotating shaft 5 to perform excavation 6.The shield excavator 1 excavates while being pressed by the shield jack 6 and moves forward. Go ahead. After a certain amount of advance, the segment 7 is inserted first and connected to the segment 7 forming the retaining tube 8, and the retaining tube 8 is extended and the shielding work is performed. The earth retaining tube 8 is formed by the shield tunneling machine 1.The diameter of the tunnel 20 is larger than the diameter of the earth retaining tube 8 which is made up of a large number of segments 7, so there is a gap between the earth retaining tube 8 and the tunnel. The earth retaining cylinder 8 is in a state where it appears to be floating in the tunnel, and water or the like is usually collected therebetween. The second part will be filled with mortar etc. later.
Prior to this, the intended filling area and other gaps must be completely sealed off. For the second purpose, the earth retaining cylinder 8 is supported by the following means, and the front and rear sides thereof are completely blocked off. In order to support the earth retaining tube 8, an annular tube 1O as shown in FIG. 3 is required. The tube IO is made of cloth, rubber, resin, etc., has an inner diameter approximately equal to the outer diameter of the retaining cylinder 8, and is provided with an injection port 11 into which a filler is injected. A clamped piece 12 is formed on one side of the tube 1O over the entire circumference. Next, to explain the actual support method using this tube 10, first, as shown in FIG. 1, the tube 10 is
It fits into the outer periphery of the retaining tube 8, which is made up of the segment closest to the seal excavator l. At this time, the clamped piece 12 is placed on one joint surface of the segment, and the injection port 11 is inserted into the hole 13 formed in the segment 7 and held there. Then, when segment 1 is added inside the tube,
The clamped piece 12 is interposed and fixed between the segments, and as the shield excavator I excavates, the tube 10 is
It passes between the retaining tube 8 and the packing 14 and is brought out into the tunnel 20, and a filler such as cement or hard foamed resin is injected from the injection port 11 at an appropriate location to fill the tube 10.
It is possible to inflate it and bring it into close contact with the tunnel to fix the earth retaining cylinder 8 and to block the front and rear sides. The filler flows inside the tube and reliably covers the area around the earth retaining cylinder 8, and
Once solidified, support and isolation are ensured. In addition, as in the example, the part supported by the tube is 1.
The gaps are approximately 0 m, but these can be changed as appropriate depending on the condition of the tunnel.Furthermore, filling material is later put into the gaps between the tubes, but the tubes prevent leakage, so filling can be done reliably. iiJ Noh. As described above, according to the second invention, by injecting the filler into the tube using a tube, the filler does not flow out and is reliably routed around the outside of the earth retaining cylinder, while the tube is flush with the tunnel surface. It is possible to firmly support and fix the parts in close contact, and also to completely block the gap. Since the filling material only needs to be filled by the tube capacity, its welfare also has the effect of significantly reducing the amount used compared to the previous ones. 4. Brief description of the drawings Figure 1 is a sectional view showing the state of use of this invention, Figure 2
The figure is a sectional view of the main part, and FIG. 3 is a perspective view of the annular tube. 1... Shield tunneling machine, 7... Segment, 8...
・Earth retaining tube, 10... Annular tube, 11... Injection 0
．． 12...Piece to be held, 13...Segment hole. 14... Packing for maintaining watertightness, 15...
gap. Patent applicant Kiyoko Hayabe 4-

Claims (1)

[Claims] 1. An annular tube is inserted into the outside of the upper retaining cylinder made up of segments, and a clamped piece formed on the outer periphery of the tube is interposed and fixed between the segments, and then inserted into the hole of the segment. A method for supporting an I-retaining part, characterized in that a filling material is injected from an injection port of an inserted tube to inflate the tube and support a retaining cylinder. 2. A support device for a Q earth retaining tube, characterized in that an injection port is provided inside the annular tube, and a piece to be held is formed on the outer periphery.