JPS58113492A - Cut-off device - 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 present invention relates to a water stop device suitable for application to an underground water supply system for stopping muddy, sandy water flowing into a reaching shaft in a pipe propulsion method.

To bury a pipe or segment underground, for example, as shown in Fig. 1, the pipe or segment 3 is inserted through the wall hole 2 on the side of the starting shaft 1, and is buried laterally underground (in the figure) by the thrust of a hydraulic jack or the like. A propulsion method is adopted in which the material is pushed sequentially in the A direction). In this case, the pipe etc. 3 is the wall penetrating shaft 5 on the reaching shaft 4 side.
It passes through and is extruded. At this time, as the pipe, etc. 3 is propelled, underground spring water and surrounding earth and sand flow into the shaft 4 from the through-hole opening 5 through the excavation gap l between the pipe, etc. 3 and the ground, and at the same time, mud and sand that flow out flow into the shaft 4. Deposits within 4. Furthermore, the greater the difference between the underground pressure water and the atmospheric pressure inside the shaft, and the larger the gap 1, the greater the intrusion of water and mud into the shaft, making the work of burying pipes and the like extremely dangerous.

Therefore, as a conventional water stop method, there is a method of filling the reaching shaft with water to reduce the difference between the pressure of spring water from underground and the pressure inside the shaft. According to this method, it becomes impossible or extremely difficult for a worker to stand by in the tunnel and instruct the moving worker about the direction and position of the pipe, etc. 3, which hinders the burying work. There is also a method of installing steel or wooden campers radially at the entrance of the shaft's side wall and filling the gap with sandbags, cloth, sponge rubber, etc. 1, but with this method as well, spring water pressure acts on the filling material such as sandbags. This method is unstable and dangerous, as it is not uniform and some sandbags are missing, causing serious damage inside the mine. Furthermore, a method of improving the ground by injecting a coagulating chemical into the ground where water is thought to be springing is adopted, but the chemical itself is expensive, and unless spring water occurs at the location where the pipe is dug and buried. However, the cost of the chemical solution and work is large, and there is a risk that the chemical solution may enter underground water for water supply through underground water veins, causing chemical damage.

In view of these points, the present invention can stop the spring water that occurs when a pipe or segment enters the shaft through-hole, and also prevents mud and sand from flowing into the shaft, thereby ensuring safe underground work. In order to propose this type of municipal water system, an embodiment of the present invention will be described below.
This will be explained in detail with reference to the drawings.

FIG. 2 is a longitudinal sectional view showing an example of the present invention.

Reference numeral 8 indicates a waterproof backing, which is made of a material such as natural rubber or synthetic rubber, and one that satisfies basic properties such as elasticity, tensile strength, abrasion resistance, and chemical resistance is selected. The outer diameter is such that it can be removably attached to the reaching borehole ring 9, and a plurality of bolt holes 8a are bored on the outer circumferential side thereof. and the hole 8 through which the d-segment passes.
b is drilled in the center. This hole 8b is set to be smaller than the outer diameter of the tube, etc., and a convex body 10 for locking a wire rope is provided protruding from one surface, that is, the surface opposite to the direction of propulsion of the tube, etc. The convex body 10 is formed in the same body as the water-stop backing 8, has a height h greater than the diameter of the rope, and is formed in the shape of a single circle. The convex body 10 is concentric with the hole 8b, and is set to have a diameter φ smaller than the outer diameter of a pipe or the like passing through the hole 8b.

For example, as shown in FIG. 3, such a water-stop backing 8 is used to attach the reaching shaft ring 9 installed at the through-hole opening 12 excavated on the wall surface of the reaching shaft 11 using bolts and nuts 1 on the surface.
Fixed at 4. A pipe or the like 13 propelled from a starting shaft (not shown) comes into contact with the water stop backing 8, but because the propulsive force is large, it forcibly passes through the hole 8b of the water stop backing 8. In this case, the Ik water banking 8 including the convex body 10 is turned over by the propulsion of the pipe etc. 1 and comes into close contact with the outer surface of the pipe etc., thereby exhibiting a watertight state. At this time, the mud and sand gushing out from the excavation gap between the pipe etc. 13 and the ground presses against the water stop backing 8, but the banking 8 including the convex body 10 is partially covered by the turning of the water stop backing 8. Water can be stopped by winding the wire rope 15 between the convex body 10 and the bolt hole 8a to apply tension. Convex body 1
0 has the effect of tightening the rope 150 to tighten the backing 8 to the pipe etc. 13 to prevent the position from shifting.

Since the tension of the rope 15 can be adjusted on the ground according to the spring water pressure, the workers do not need to wait inside the shaft, which can improve human safety.

FIG. 4 is a longitudinal sectional view showing another example of the present invention.

Reference numeral 17 indicates an engagement tool provided to prevent the rope 15 from coming off the banking 8 when the fo-op 15 is wound around the convex body 10. The metal fitting 17 is attached so as to straddle the top of the convex body 10 and the backing 8, and the rope 15 is inserted between the metal fittings 17 and the backing 8.
is wound. The metal fitting 17 is preferably made of a spring material. , 18
indicates the screw for mounting the bracket. As shown in FIG. 5, the metal fittings 18 are attached to a plurality of locations, for example eight locations, around the water stop backing 80. By providing this engagement fitting 17, the rope 15 can be wound before the water stop backing 8 is bolted to the reaching shaft ring 9, and the end of the rope 15 can be operated on the ground when propelling a pipe, etc. Therefore, operational safety can be further improved.

FIG. 6 is a diagram showing still another example of the present invention, which is a suitable device as a water stop method when burying a large diameter pipe or segment. The convex body 10 is integrally molded in a spiral shape with the water stop/kunoking 8. Of course, the maximum diameter of the spiral is set to be smaller than the pipe or the like to be propelled and buried. The number of spiral rows is appropriately selected depending on the spring water pressure and the diameter of the pipe. Engagement fittings 17 are attached to the spiral convex bodies 10 in each row. When using the water stop device of this example, the rope 15 can be wound and locked around all the convex bodies 10, so the watertightness between the pipe etc. and the water stop backing 8 is further improved, and sudden It can also handle spring water pressure reliably. In this case, the spiral convex body 10 is turned over and deformed into a spiral shape as the pipe or the like enters, but the rope 15 does not escape from the convex body 10 (d).

In addition, instead of the explanation that the convex body 10 is made of the same material as the water-stop backing 8 and is integrally molded, the convex body 10 itself is formed independently and attached to the water-stop backing 3 by a method such as gluing or screwing. You can do it like this.

As described above, according to the present invention, the convex body is provided on one side of the water stop banking, and the inner diameter hole is formed to be smaller than the outer diameter of the pipe or segment.
By winding a rope around the convex body, the mud and sand gushing out from between the convex body part of the water-stop backing and the propelled pipe or segment will leak out when the rope is tightened. This eliminates the possibility that the water will flow into the reaching shaft and interfere with subsequent work.

In addition, by making the convex body not only circular but also spiral or spiral, the tightening force of the rope can be set freely, making it possible to withstand sudden spring water pressure and prevent accidents caused by spring water protruding. This can be prevented.

In addition, since a metal fitting for engaging the wire rope is attached to the convex body, the rope can be easily attached to the water-stop backing, and the rope can be hung in the tunnel to prevent accidents during work. Rope hanging can also speed up the work itself.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing how a conventional water stop device is used;
The figure is a longitudinal sectional view showing an example of the present invention, and Figure 3 is a book, fnf
FIG. 4 is a vertical sectional view showing another example of the present invention, FIG. 5 is a side view of the example shown in FIG. It is a longitudinal cross-sectional view showing an example. 8...Water stop backing, 9...Arrival well rolling, 1
0... Convex body, 11... Reaching shaft, 12... Penetrating shaft entrance. 13... Pipe or segment, 15... Water stop wire rope, 17... Engagement fitting. Agent: Attorney Takashi Akiyama Figure 6 Procedural Amendments November 30, 1981
1. Indication of the case Showa era patent application No. 169591 2. Title of the invention Water stop device 3. Person making the amendment Relationship to the case Name of applicant p.
122 Mae-Oki, Nakata-cho, Sendai City, Miyagi Prefecture 0 names shown
Village 1) Kazuo 4, agent 7, the claims of the specification to be amended, each column of the detailed description of the invention and the brief description of the drawings, drawing 8, and the content of the amendment ill the scope of the claims on a separate sheet. Correct as expected. (2) Page 6 lines 4 and 6 of the specification [Metal fittings-1]
I am corrected. (3) On the same page, line 7, ``For attaching metal fittings'' is corrected to ``For attaching bonding tools.'' (4) Correct "metal fitting 18" in line 8 of the same text to "engaging tool 11". (5) On the same page, line 10, "engagement metal fittings" is corrected to "retention tool." (6) Add the following sentence between lines 15 and 16 on the same page. "Instead of the above-mentioned example, the engaging tool 17 can be used to lock the lobe 15 by bonding a rubber band made of the same material as the backing 8 to the backing 8 with a strong adhesive." 7th line, 3rd line, “Engagement fittings” should be corrected as “Engaging tool”. (8) 8th page, 10th line, “Engagement fittings” should be read as “Engagement tool”. (9) 9th page, Line 5 should be corrected. Correct "engaging metal fittings" to "retaining tools." QO) Correct drawing 6 for medium temperature as shown in the attached sheet. Claims 1. A convex body is provided on one side of the water-stop backing,
A water stop device characterized in that a hole with an inner diameter smaller than the outer diameter of a pipe or segment is bored. 2. The municipal water device according to claim 1, wherein the convex body is formed in a single circular shape, a spiral shape, or a spiral shape. 3. The water stop device according to claim 1 or 2, wherein a wire stopper is attached to the convex body. 4. A wellhead ring is provided at the end of the through-hole located in the reaching shaft, and a water stopper and a kinogu are removably installed on the wellhead ring, and the surface opposite to the propulsion of the buried pipe or segment of the waterstop backing is provided. A water stop device, characterized in that the water stop backing is provided with a convex body for locking a water stop wire, and the water stop backing has an inner diameter hole set to be smaller than the outer diameter of the pipe or segment. Figure 6: Commissioner of Procedural Amendment Office, Kazuo Wakasugi, Chief Adjudicator, Patent Office, Japan Patent Office'
# Inspection Palace 1, Display of the case Showa 1 Biennial Patent Application No. 169591 2 Title of the invention Water stop device 3, Person making the amendment Relationship to the case Applicant address G 122 Mae-Oki, Nakata-cho, Sendai-shi, Ibaraki Prefecture Address Name Village E8 Kazuo 4, Agent 8, Contents of amendment (1) Akira, 5411413 Revised line 14 from “Not responsible” to “Beared”
I am corrected. (2) On page 8, line 12, ``Injury'' is changed to ``Kena'' in d1. (3) On the same page, line 14, ``Workability'' is corrected to ``Structural beam''. (4) Figure 5 in the middle part of the drawings will be corrected as shown in the attached sheet. Liao L

Claims (1)

[Claims] 1. A convex body is provided on one surface of the water-stop backing,
A water stop device characterized in that a hole with an inner diameter smaller than the outer diameter of a pipe or segment is bored. 2. The above-mentioned convex body is formed in an internal shape, a spiral shape, or a spiral shape.1. *Water stop device according to claim 1. 3. The water supply device according to claim 1 or 2, wherein a wire engagement fitting is attached to the convex body. 4 A wellhead ring body is provided at the end of the through-hole located in the reaching shaft, a water stop backing is removably provided on the wellhead ring body, and a water stop ring is provided on the opposite side of the buried pipe or segment of the water stop backing from the propulsion side. 1. A water stop device, characterized in that a convex body for locking a water stop wire is provided, and the water stop backing has an inner diameter hole set to be smaller than the outer diameter of the pipe or segment.