JP2003293700A - Water sealing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water sealing material surely fixed to a segment and not moving from a disposed position. <P>SOLUTION: This water sealing material is disposed around a connection hole provided around the peripheral surface of a tunnel for connecting a drive device in the tunnel for driving an earth retaining slide plate to the earth retaining slide plate disposed on the outer peripheral surface of the tunnel. The water sealing material comprises a water swelling rubber material with a projected part 20 disposed as an upper surface material 2, a steel plate disposed as an intermediate material 3, and a water swelling rubber material disposed as a lower surface material 4. The upper surface material 2, intermediate material 3, and lower surface material 4 are integrally connected to each other, and fixing holes 11 are provided through these three members. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a landslide slide plate from the outer peripheral surface of one tunnel to the other tunnel when joining the tunnels using the landslide slide plate. The present invention relates to a water-stopping material for preventing leakage of water or inflow of earth and sand from around a connection hole provided in a tunnel peripheral surface for connecting the retaining plate with a driving device in a tunnel when passing. [0002] Shield tunnels or mountain tunnels and M
In the MST method and the like, there is a method of constructing a large space tunnel by joining a plurality of adjacent tunnels constructed in the same traveling direction. The junction between the shield tunnels performed at this time is, as shown in FIG.
Is carried out by bridging a ridge slide plate c slidably disposed on the outer peripheral surface of the segment b constituting the shield tunnel d. The slide plate c for dome is slid toward the other shield tunnel d by the driving device e disposed in the shield tunnel a. The slide plate c for retaining and the driving device e arranged on the outer peripheral surface of the segment b are directly connected to the connection hole f formed in the segment b through the connection arm g. At this time, since the connecting hole f is opened in the soil, it is not possible to sufficiently prevent water leakage and inflow of earth and sand by merely adjoining the ridge slide plate c to the outer peripheral surface of the segment b. Therefore, conventionally, at the time of joining between the shield tunnels a and d, the surrounding ground where the slide plate c for retaining is located is improved by a freezing method or a chemical solution injection to stabilize the surrounding ground and stop water. As shown in FIG. 3, the waterproof rubber h is provided between the connecting hole f of the segment b and the slide plate c for retaining.
By disposing the connecting hole f and the slide plate c
In many cases, the gap between them was sealed to prevent water leakage and inflow of earth and sand. When using the waterproof rubber h, use the waterproof rubber h
Is fixed by sandwiching it between the segment b and the slide plate c for ridges, or is fixed to the outer peripheral surface of the segment b using an adhesive. [0003] The above-mentioned conventional water stopping means has the following problems. <B> In the freezing method, since it takes time from the start of the construction to the stability of the ground, several days of waiting time is required before the joining work between the shield tunnels starts.
And construction cost is high. <B> In the case of chemical injection, for example, when the ground improvement position (shield tunnel junction position) is on the bottom side of the shield tunnel, the chemical liquid flows out over a wide area, and it is difficult to perform reliable construction in the range where stability is to be achieved. Yes, and there is concern about the reliability of ground improvement. <C> In the case of using the waterproof rubber, as shown in FIG. 3, the waterproof rubber h is dragged by the landslide slide plate c, and stretches or gets caught and moves from the waterproof position,
A gap is formed in the seal of the moved portion (right side of the connection hole f in FIG. 3), which may cause water leakage and inflow of earth and sand. SUMMARY OF THE INVENTION [0004] The present invention has been made to solve the above-mentioned conventional problems, and provides a water-stop material which is securely fixed to a segment and does not move from a water-stop position. The purpose is to do. Another object of the present invention is to provide a water-stopping material that can achieve water-stopping without requiring a waiting time after assembling the segments constituting the shield tunnel.
Still another object of the present invention is to provide a water-stopping material that can reliably stop water regardless of the joining position of the shield tunnel. In addition, an object of the present invention is to provide a waterproof material which is not dragged by a landslide slide plate.
The present invention achieves at least one of these objects. [0005] In order to achieve the above-mentioned object, a waterproof material according to the present invention is provided on a ridge slide plate provided on the outer peripheral surface of a tunnel. A water-swelling material disposed around a connection hole provided on a tunnel peripheral surface to connect a driving device in a tunnel to be driven, and a water-expandable rubber member having a convex portion disposed as an upper surface material,
A steel plate disposed as an intermediate member, and a water-swellable rubber member disposed as a lower surface member, the upper surface member, the intermediate member and the lower surface member are integrally joined, and the fixing member penetrates the three members. It is characterized by having holes. here,
The “tunnel outer peripheral surface” refers to an outer peripheral surface of a segment forming a segment ring in a shield tunnel, for example. As the above-mentioned slide plate for mountain retaining, a known steel plate, which is a member having sufficient rigidity to sufficiently support the ground around the tunnel, can be adopted. In addition, as the convex portion, those having a rounded tip or a flat surface, such as a tapered or tapered one, can adopt various known shapes in consideration of the adhesiveness with the landslide slide plate,
The number thereof may include a plurality of continuous convex portions, a plurality of spaced convex portions, or a combination thereof. Further, the water-swellable rubber member expands by absorbing moisture and has elasticity. For example, a composite material of a highly water-absorbing polymer and rubber or a composite material obtained by mixing and vulcanizing a water-swellable resin and synthetic rubber And the like can be adopted. An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. <A> Water-Stopping Material The water-stopping material 1 is provided on the outer peripheral surface of the segment 5 in order to stop water in the gap between the connection hole 50 formed in the segment 5 of the shield tunnel and the slide plate 6 for ridge. It is a member arranged between the slide plate 6 for the dome. The waterproof material 1 of this example is
It has a composite structure in which the upper surface member 2, the intermediate member 3, and the lower surface member 4 are integrally formed. At this time, the upper surface member 2 and the intermediate member 3 and the lower surface member 4 and the intermediate member 3 can be integrally joined by, for example, a known adhesive. The water blocking material 1 has a through hole 10 that does not close the connection hole 50 of the segment 5.
And a plurality of fixing holes 11 which do not overlap with the through holes 10. The through hole 10 is an opening penetrating the three members,
The connecting arm 70 of the driving device 7 when driving the slide plate 6 for mountain stay
Presents a size that does not interfere with Fixing hole 11
Is a retaining hole for a bolt or the like, and is a hole that receives the fastening force of the fixing means. As the fixing hole 11, for example, a hole having an opening whose upper surface member 2 side has an inverted conical shape larger than that of the lower surface member 2 side, and at least a part of the opening having an inverted cone shape is applied to the intermediate member 3. . The shape of the opening of the fixing hole 11 is not limited to the example of the inverted conical shape shown in this example, and the bolt 8
When the head of the head is formed in a rectangular shape (not shown), a shape in which the seat for receiving the head of the bolt 8 is located on the intermediate member 3 or a shape capable of receiving the fastening force of the bolt 8 or the like is arbitrarily selected. You can also. The water-stopping material 1 has the through hole 10 overlapped with the connecting hole 50 of the segment 5 and the fixing hole 11 is fixed to the outer peripheral surface of the segment 5 by known fixing means such as bolting, stud fixing, or chemical anchoring. I do. At this time, the connecting hole 5
A fixing port 51 corresponding to the fixing hole 11 is formed on the outer peripheral surface of the segment 5 around one. The fixing port 51 may be a threaded hole on the inner peripheral surface if it is bolted, or a hole for injecting a solidifying agent if it is chemical anchored. At this time, by fixing the head of the bolt or the like to the intermediate member 3 which is a part of the inverted cone of the fixing hole 11, the fixing force of the water stopping material 1 to the outer peripheral surface of the segment 5 by the fixing means is reduced. It can be received by the intermediate material 3. FIG. 1 shows an example of the case of fixing with a bolt 8, but the shape of the head of the bolt 8 and the like is not limited to the example of the inverted conical shape shown in this example, and the opening shape of the fixing hole 11 is also shown. It can be arbitrarily selected according to. Further, the head of the bolt 8 is attached to the slide plate 6 for the dome.
In order to avoid contact with the fixing holes 11, it is preferable to be configured to be able to be accommodated in the opening so as not to protrude from the fixing hole 11 described above.
FIG. 1 shows an example in which two fixing holes 11 and two fixing holes 51 are provided at both ends of the water-stopping material 1 and fixed. However, the present invention is not limited to this, and the water-stopping material 1 is sufficiently provided. As long as it can be fixed, the fixing points may be provided at one end at each end on FIG. 1 or at two or more positions. Hereinafter, each member constituting the water blocking material 1 will be described. <B> Upper surface material The upper surface material 2 is a convex portion 20 which is in close contact with the landslide slide plate 6.
And covers the upper surface of an intermediate material 3 described later. The upper surface member 2 has a hole that forms the through hole 10 of the water blocking material 1 and a hole that forms the fixing hole 11. Upper surface material 2
In order to enhance the adhesion to the landslide slide plate 6 and to improve the water stopping performance, a water-swellable rubber having the property of absorbing moisture while expanding while having elasticity is adopted. The convex portion 20 of the upper surface member 2 is formed so as to surround the through hole 10 of the waterproof material 1. The protrusions 21 of the protrusions 20 may be one or more than two continuous ones shown in FIG. 1, and the respective protrusions may be provided continuously or separated from each other. Well, it can be appropriately selected according to the water stopping condition. Also, as for the shape of the convex portion 21, various known shapes in consideration of the adhesion to the landslide slide plate 6, such as those having a rounded tip, a flat surface, and a tapered or tapered whole, are used. Can be adopted. In addition, in this example, although the suitable example which employ | adopted the water-expandable rubber as the upper surface material 2 was shown, it is not limited to this, A well-known material which can be employ | adopted as a natural resin having elasticity, a chemical resin, etc. Can be adopted. <C> Intermediate material The intermediate material 3 is a member serving as a core of the water blocking material 1 and is made of a rigid plate. The intermediate member 3 has a hole that forms the through hole 10 of the water blocking material 1 and a hole that forms the fixing hole 11. The intermediate member 3 includes an upper surface member 2 described above and a lower surface member 4 described later.
It is located between. The intermediate portion 3 has such a rigidity that the water-stopping material 1 is not rolled up or displaced when the slide plate 6 for siding slides. Therefore, the intermediate portion 3 may be a known plate, such as a steel plate, a plate made of a known metal, or a plate made of a hard resin, as long as the member satisfies the above conditions. The water-stopping material 1 is fixed to the segment 5 via the intermediate member 3, so that when the landslide slide plate 6 is slid, the water-stopping member 1 is dragged by the above-described upper surface member 2 so as to be caught and turned up. Can be prevented from shifting. <D> Lower surface member The lower surface member 4 is a member that is in close contact with the segment 5 and covers the lower surface of the intermediate member 3 described above. The lower surface member 4 has a hole that forms the through hole 10 of the water blocking material 1 and a hole that forms the fixing hole 11. The lower surface member 4 is made of a water-swellable rubber having a property of absorbing moisture and expanding while having elasticity, in order to increase the adhesion to the segment 5 and increase the water-stopping property when the water-stopping material 1 is fixed. I do. This material may have the same characteristics as the upper surface material 2 described above. In the present embodiment, the use of water-expandable rubber as a material of the lower surface member 4 is merely a preferable example, and a known material that can be used for a waterproof rubber such as an elastic natural resin or a chemical resin can be used. Next, an example of installation of a water blocking material and joining of a shield tunnel according to an embodiment of the present invention will be described with reference to FIGS. <A> Installation of water-stopping material The water-stopping material 1 is fixed in advance to the water-stop position of the connection hole 50 formed on the outer peripheral surface of the segment 5 to be assembled in the shield machine (not shown) together with the slide plate 6 for the ridge. Keep it. The water blocking material 1 is provided with connection holes 50 formed in the outer peripheral surface of the segment 5.
The fixing hole 11 is overlapped with the fixing hole 51 drilled around the
This is fastened and fixed with bolts 8. Since the head of the bolt 8 abuts against the intermediate member 3 of the rigid waterproof material 1, the bolt 8 is securely fixed. In addition, the lower surface material 4 of the water-stopping material 1 has high adhesion to the outer peripheral surface of the segment 5 by the bolt 8 fastening, so that water can be reliably stopped between the segment 5 and the water-stopping material 1. Waterproof material 1 fixed to the outer peripheral surface of segment 5
On the top, the slide plate 6 for mountain stay is mounted. At this time, the convex portion 20 of the upper surface material 2 is positioned on the contact surface between the water blocking material 1 and the retaining plate 6 so as to surround the connection hole 50. Since the water-stopping material 1 is fixed to the outer peripheral surface of the segment 5, the water-stopping material 1 does not move and the convex portion 20 of the upper surface member 2 does not deviate from the surrounding position of the connection hole 50.
The water stop between the connecting hole 50 and the slide plate 6 for dome is ensured. In this manner, by arranging the water-stopping material 1 between the connection hole 50 of the segment 51 and the slide plate 6 for anchoring, the water-stopping therebetween can be reliably performed.
As described above, the segment 5 on which the water-stopping material 1 and the retaining plate 6 are installed is transported to a shield machine (not shown) to assemble a shield tunnel. <B> At the time of joining the shield tunnel As described above, since the water blocking material 1 is fixedly arranged on the outer peripheral surface of the segment 5, at the time of joining the shield tunnel,
When sliding the slide plate 6 for mountain retaining by the driving device 7, the water-stopping material 1 is not dragged by the slide plate 6 for mountain retaining and does not move from the water stopping position due to being turned up or shifted. Thus, while the slide plate 6 for ridges is bridged between the shield tunnels, the water stop around the connection hole 50 of the segment 51 can be reliably ensured. As described above, the waterproof material of the present invention has the following advantages. <B> Since the water-stopping material is securely fixed to the segment with bolts or the like, it is not dragged by the landslide plate and does not move from the water-stopping position. Therefore, a reliable water stopping effect can be obtained. <B> Compared with the stabilization of the surrounding ground by the freezing method,
After assembling the segments that make up the shield tunnel, there is no need to wait for the ground to stabilize, and the joining work can be started immediately under reliable water stoppage, reducing the work period and reducing the cost. it can. <C> Compared to stabilization of the surrounding ground by injecting the chemical,
For example, water can be reliably stopped at any position of the tunnel, such as the bottom side of the tunnel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of an embodiment of a water-stopping material of the present invention. FIG. 2 is an explanatory view showing an example of use of a water-stopping material of the present invention. [Description of reference numerals] 1 ... water blocking material 10 ... through hole 11 ... fixing hole 2 ... top surface material 20 ... convex portion 3 ... Intermediate material 4 ... Bottom material 5 ... Shield tunnel 50 ... Segment 51 ... Connection hole 6 ... Slide plate for dome

Claims (1)

Claims: 1. A connecting hole provided in a tunnel peripheral surface for connecting a driving device in a tunnel for driving the mountain retaining slide plate to a mountain retaining slide plate disposed on the outer peripheral surface of the tunnel. A water-swellable rubber member having a convex portion provided as an upper surface material, a steel plate provided as an intermediate material, and a water-swellable rubber member provided as a lower surface material A water blocking material, wherein the upper surface member, the intermediate member, and the lower surface member are integrally joined, and a fixing hole penetrating the three members is provided.