JP3061586B2 - Segment with water stop device and method of assembling the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment with a water stopping device used for water blocking in shield construction and the like, and a method for assembling the same. It relates to an assembling method.

[0002]

2. Description of the Related Art In tunnel construction, there is a case where a branch tunnel is provided which branches from a main line tunnel. FIG. 12 is a perspective view showing an example of a tunnel structure in the case where a branching shield machine is started from the inside of the main line tunnel and is built on the side surface of the main line tunnel by the rhizome method.

The tunnel structure shown in FIG. 12 is formed by starting a branch shield machine b from inside a tunnel of a main line tunnel A constructed by a main line shield machine a to construct a branch tunnel B. In this rhizome construction method, a middle trunk C is provided in advance in an opening serving as a launching port of the branch shield machine b. In some cases, an opening is directly provided by cutting and removing a segment of the main line tunnel A into a required shape.

FIGS. 13 and 14 are side views in the direction of the junction tunnel at the joint between the main line tunnel and the junction tunnel when the junction tunnel is constructed. In starting from inside the tunnel, as shown in FIG. 13 or FIG. 14, a steel cylindrical pipe D is attached inside the opening of the main line tunnel A, and a branching shield machine b excavates inside the cylindrical pipe D. To build a branch tunnel T. At this time, a clearance E between the cylindrical pipe D and the branch shield machine b, and a gap E between the cylindrical pipe D and the branch tunnel B.
In order to prevent earth and sand, groundwater, and the like from leaking into the pit, it is important in construction to stop the water with a pressurized packing e shown in FIG. However, due to the function of the tunnel,
The cylindrical pipe D located on the inner side of the finished surface of the main line tunnel A (the inner side of the main line tunnel A from the broken line in FIG. 14) is removed. At this time, the packing e and the like are also removed.
Under high water pressure, water must be stopped within the width of the main line tunnel A. As a method for stopping water in the gap E, FIG.
5, a water stopping method using a "water stopping segment" disclosed in Japanese Patent Application Laid-Open No. 4-76197 is known. In this method, a pressing bolt 101 is screwed into a segment 100 with a water stop device to make each split ring 103 integral with the entrance packing 102 project evenly, so that the tip of the projected entrance packing 102 has a steel cylindrical tube D
, So that water can be stopped between the two.
Further, when the split ring 103 is projected, both skirts of the entrance packing 102 come into close contact with the thick portion of the sealing material 104, so that the sealing material 104 and the entrance packing 10
Water can be stopped between the two at the same time.

[0005]

However, the "water-stop segment" disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 4-76197 has the following problems. (1) Since the entrance packing 102 is an annular body, it can be applied to the case where the joint has a three-dimensional curved surface shape, such as the case where the branch tunnel B is constructed in the main tunnel A. Absent. (2) The holding pressure of the packing material on the water stop surface by this structure depends on the partial sticking force between the entrance packing 102 and the split ring 103 and the shape holding characteristics of the material of the entrance packing 102. When the portion is small, and especially between the split rings, there is a portion where the entrance packing 102 is not supported, so that the pressing force is likely to be insufficient, and it is difficult to secure a high waterproofness. (3) Since the mechanism for holding the split ring 103 relies exclusively on the contact with the sealant 104, when the void is large under high water pressure, a large lateral pressure acting on the entrance packing 102 projecting into the void On the other hand, when the entrance packing 102 is displaced (falls) in a sectional view, it is difficult to secure high water stopping performance. As a countermeasure against this, if the height of the entrance packing 102 is increased to increase the amount remaining in the groove 105, only the main body is used as a structure for transmitting the segment jack thrust after assembly due to the height of the segment to be installed. May not be able to respond.

Accordingly, the present invention has been made to solve the above-mentioned problem, and is simple and easy to install in a water stoppage on a curved surface or the like in a case where a branch tunnel is provided from a main line tunnel. It is an object of the present invention to provide a segment with a water stopping device having a high water stopping property.

[0007]

According to the first aspect of the present invention,
A segment with a water-stop device obtained by dividing an annular body used for the purpose of stopping water between a tunnel and a tunnel outer surface in shield construction or the like, and a start-side ring attached to a start side of the tunnel. A face-side ring attached to the face side of the tunnel, and a water stop portion attached between the start port side ring and the face side ring, wherein the water stop portion is a main line tunnel.
And an endless ring on the outer peripheral surface when assembled to the annular body according to the shape of the curved surface of the joint of the branching tunnel, and a stop that can contact the outer surface when the diameter is expanded. A water-sealing, the face-side ring is provided separately on an inner peripheral portion of the water-stop seal, and a diameter-enlargement bar capable of expanding the water-stop seal by pushing to expand the water-stop seal,
And an extruding means for extruding or retracting the enlarged diameter bar.

[0008] According to the first aspect of the present invention, the start side ring located on the start side of the tunnel, the face side ring located on the face side of the tunnel, and the start side ring and the face side ring. Main tunnel and branch
In the segment with the water stop device configured from the water stop portion adapted to the shape of the curved surface portion of the joint of the channel, the expansion bar of the diameter expansion portion is extruded by extrusion means provided in the face side ring, and this By pushing out the diameter-enlarging bar, the water-stop seal, which becomes an endless ring when assembling the segment with the water-stop device, expands in diameter and comes into contact with the outer surface. Therefore, t
In the flannel branching section, the gap between the water-stop device-equipped segment and the outer surface is stopped by the water-stop seal, and the push-up pressure can be kept constant by a predetermined operation of the push-out means.

Further, the segment with a water stop device of the present invention
It is divided into the start side ring, the water stop section, and the face side ring.Therefore, after excavation is completed in the branch tunnel construction, the start side ring protruding into the main line tunnel pit may affect the water stop function. Can be removed without effect.

[0010] Here, the starting port side ring refers to a segment on the tunnel starting port side for mounting a water stop portion, and a typical material of the segment is steel or concrete. It is not limited to. In addition, the start-port-side ring can be configured to be able to remove a portion that interferes with finishing inside the tunnel tunnel.

The face-side ring refers to a face-side segment for attaching a water-stop portion, and the material of the segment is typically steel or concrete, but is not limited thereto.

As the water-stop seal, a seal that can be expanded by the pushing force of the diameter-expanding bar and has close contact with an external surface is used. For example, it is like rubber.
In addition, in order to ensure the strength of the water-stop seal, a material obtained by putting a steel plate in rubber may be used.

The pushing means may be any means capable of pushing or pulling in the expanding bar, for example, using a bolt or a jack.

According to a second aspect of the present invention, in the segment with the water-stop device according to the first aspect, the water-stop portion is configured to contact the outer surface when the water-stop seal is expanded. It is characterized by being provided corresponding to the shape of the surface.

According to the second aspect of the present invention,
When the diameter of the water-stop seal is increased, the water-stop seal is provided corresponding to the shape of the external surface so as to abut on the external surface. Even for a three-dimensional curved surface such as a joint at the seam, a water-stop portion is attached corresponding to the curved surface, so there is no place where the water-stop portion does not abut the curved surface, The water can be stopped.

According to a third aspect of the present invention, in the segment with the water stopping device according to any one of the first to second aspects, a surface of the enlarged-diameter bar that comes into contact with the water stopping seal has an arc shape.

According to the third aspect of the present invention, since the surface of the enlarged diameter bar that comes into contact with the water stop seal has an arc shape, the push-up force of the enlarged diameter bar uniformly acts on the water stop seal. The water can be reliably stopped, and the water can be reliably stopped without generating a void or the like even under a high water pressure.

Further, when rubber is used as the water-stop seal, for example, a uniform pressing force is always applied to the water-stop seal, so that the pressing force acts on a specific portion to damage the rubber. There is nothing.

According to a fourth aspect of the present invention, there is provided a method for assembling a segment with a water stopping device according to any one of the first to third aspects,
A first step of attaching the starting port side ring to a predetermined position, a second step of attaching the water stopping portion to the starting port side ring, and the face face side ring to the starting port side ring or the water stopping section. And attaching a third step.

According to the fourth aspect of the present invention, assembling the segment with the water stopping device, the step of assembling the starting port side ring at a predetermined position, the step of attaching the water stopping section to the starting port side ring, A step of attaching the face side ring to the entrance-side ring or the water-stopping portion, and the water-stopping portion can be attached during the assembly of the segment, so that the attachment becomes easy.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a segment with a water stop device according to the present invention; FIG. FIG. 1 is a front view (a) to (g) and a bottom view (h) of a segment with a water stop device in which the present invention is suitably implemented.
(N), FIG. 2 is a sectional view taken along the line LL ′ of FIG. 1 (k), and FIG. 3 is a sectional view taken along the line HH ′ of FIG. 1 (k).

The segment 1 (1a) with a water stop device shown in FIG.
１1 g) are roughly classified into a start port side ring 2 (2a to 2g), a water stop portion 3 (3a to 3g), and a face side ring 4 (4a to 4g). The starting port side ring 2 is a steel segment for attaching the water stop portion 3, and includes a skin plate 21 and vertical members 22 and 23 as shown in FIG. 2.
The vertical member 22 has a seal mounting bolt fastening hole 24 for connecting to the water blocking portion 3 and a ring joint bolt fastening hole 2.
5 are provided at several places. In addition, skin plate 21
Has an extension holding portion 26 slightly projecting toward the water stopping portion 3 side. This is to prevent the corners of the water stop seal 31 from being deformed inward of the pit by water pressure.

As shown in FIG. 2, the water-stopping portion 3 is constituted by a water-stopping seal 31 in which a reinforcing portion 31a made of a steel plate and a rubber portion 31b are integrated. To stop the water by contacting the surface of the tunnel joint (not shown). The water stop seal 31 has an L-shaped cross section, and is attached to a bolt fastening hole 24 (FIG. 2) provided on a side surface of the vertical member 22 by a seal attachment bolt 31d via a seal holding plate 31c. ing. The face side ring 4 is a steel segment having an enlarged diameter portion for pushing and expanding the water stop seal 31, and as shown in FIG. 2, an enlarged diameter bolt 41, an enlarged diameter bar 42, a nut plate 43, a shield case 44. , Plate 45, skin plate 46, vertical members 47, 48, and support plate 49.

The enlarged bolt 41 has a spherical tip at the tip. In order to make the contact surface with the diameter-enlarging bar 42 small during the rotation operation to facilitate the operation, a spherical color ring 41a is attached to a tip end thereof by a spring pin 41b.

FIG. 4 shows a circumferential side view (a), a bottom view (b), and a front view (c) of the diameter-enlarging bar 42 in the circumferential direction.
The enlarged diameter bar 42 has a cylindrical concave portion 4 for inserting an enlarged diameter bolt 41 having a collar ring 41a mounted at the center thereof.
2a. The top portion 42b of the diameter-enlarging bar 42 is formed in an arc shape, and the entire diameter-expanding bar 42 is always entirely sealed without damaging the rubber portion 31b of the water-stop seal 31 by being pushed out by the diameter-enlarging bolt 41 (FIG. 3). It comes in contact with. Further, as shown in FIG. 3, even at a position where the diameter-enlargement bar 42 is separated, the reinforcing portion 31a is incorporated so that the separated portion does not become only the rubber portion 31b.
A uniform pressing force can be ensured, and a shape that is in close contact with the outer surface is maintained by the action of water pressure.

The nut plate 43 has a threaded through hole 43a that can be screwed with the diameter-enlarging bolt 41.
Further, the plate 45 is also provided with a through hole 45a of the enlarged bolt 41.
have. By supporting the enlarged bolt 41 at the upper and lower portions of the nut plate 43 and the plate 45, the segment 1 with the water stop device can be screwed in the outer diameter direction.

The shield case 44 serves as a guide when the enlarged diameter bolt 41 is pushed out in the outer peripheral direction. In order to prevent water leakage from the water seal 31 into the tunnel pit, a shield case 44 such as an O ring is used. Water material is installed. The seal case 44 has a through hole 45a.
It is attached to the outside by welding or the like.

The vertical member 47 is welded to one end of the nut plate 43 and one end of the plate 44. The opposite ends of the nut plate 43 and the plate 44 are welded to the backing plate 49. Then, the bolt 49 b is passed through the through hole 49 a of the support plate 49 and the ring joint bolt fastening hole 25 and fastened to the vertical plate 22 of the starting port side ring 2.

Next, the segment 1 (1a)
1g) will be described. FIG. 5 is a sectional view in the circumferential direction when the water-stopping device-equipped segment is assembled. FIG. 6 is a side view of the branch part tunnel B when the segment 1 with a water stopping device is mounted on the branch part tunnel B, and a sectional view of the main line part tunnel A in the circumferential direction.

The cylindrical segment with a water stop device shown in FIG. 5 is constructed by assembling a total of 13 divided segments 1 (1a to 1g) with a water stop device. Segment 1 with water stop device (1a to 1g)
As shown in FIG. 6, the order of assembling the starting port side ring 2 (2a to 2a)
g) is attached.

Next, the water stop portions 3 (3a to 3g) are attached. Specifically, the water stop seal 31 is inserted into the seal fastening bolt fastening hole 23 of the vertical member 22 by the seal holding plate 31.
It is fastened by the seal mounting bolt 31d via c. Subsequently, the face side ring 4 (4a to 4g) is attached. Specifically, the vertical plate 22 is fastened to the through plate 49 of the face-side ring 4 to which the enlarged diameter portion 50 is attached in advance through the through holes 49a and the ring joint bolt fastening holes 25 through the bolts 49b. Therefore, at the site, the water stop portion 3 and the face side ring 4 can be easily mounted by fastening the seal mounting bolt fastening holes 23 and the ring joint bolt fastening holes 25 through the seal mounting bolts 31d and the bolts 49b, respectively. Can be assembled. At this time, the height of the skin plate 46 is made lower than that of the skin plate 21 so that the water stop seal 31 is not bent by the skin plate 46 and protrudes from the outer peripheral surface of the tunnel B. In addition, each of the segments 1 with a water stop device shown in FIG.
As shown in FIG. 6, the water stop portions 3 (3a to 3g) of (1a to 1g) conform to the shape of the curved surface portion so that the water stop seal 31 contacts the curved surface portion of the joint of the main line tunnel A. Are located. This makes it possible to reliably stop the water at the joint between the main line tunnel and the branch tunnel.

Next, the operation of stopping water by the segment with the water stopping device according to the present invention will be described with reference to FIGS. FIG. 7 is a cross-sectional view in the longitudinal direction of the top of the branch tunnel (top end) before sealing, and FIG. 8 is a cross-sectional view after sealing. FIG. 9 is a horizontal cross-sectional view of the branch tunnel side before sealing, and FIG.
It is sectional drawing after sealing. FIG. 11 is a circumferential cross-sectional view of a junction tunnel at a joint after sealing.

In the segment with the water stop device at the top end of the tunnel (ie, the segment with the water stop device 1a in FIG. 1), as shown in FIG. 8, from the normal state shown in FIG. By pushing in, the diameter expansion bar 42 is pushed out, and the water stop seal 31 is pushed out. When the water seal 31 that has been pushed out contacts the main line tunnel A, the water in the gap E can be stopped. In the case of the segment 1 with the water stop device at the top end of the tunnel, the starting port side ring 2a is small and the face side ring 4a is large in accordance with the shape of the opening of the main line tunnel B.

Similarly, in the segment with the water stopping device at the side of the tunnel (ie, the segment with the water stopping device 1d in FIG. 1), the diameter of the bolt is increased from the normal state shown in FIG. 9 as shown in FIG. By pushing the 41 in, the expanding bar 4
2 is pushed out and the water seal 31 is pushed out. Then, the expanded water-stop seal 31 comes into contact with the main line tunnel A, so that water can be stopped in the gap E. In the case of the segment with the water stop device at the side of the tunnel, the starting side ring 2
Is large, and the face side ring 3 is small.

When the above operation is viewed from the cross section side in the circumferential direction of the branch portion tunnel, as shown in FIG. 11, when the diameter increasing bolt 41 is pushed in, the diameter increasing bar 42 is pushed out and the water sealing seal 31 is pushed out. Press and expand. Then, the expanded water-stop seal 31 comes into contact with the main line tunnel A, so that water can be stopped in the gap E.

According to the segment 1 with the water stop device described above, the gap E between the segment 1 with the water stop device and the main tunnel T is stopped by the water stop seal 31 and the enlarged bolt 41 (the pushing means). With the adjustment of (3), the push-up pressure can be kept constant.

Further, since the segment 1 with the water stop device is divided by the start port side ring 2, the water stop portion 3, and the face side ring 4, for example, after excavation in the branch tunnel construction, the main line The start-side ring 2 protruding into the tunnel A can be removed without affecting the water stop function.

The water stop portion 3 is provided corresponding to the shape of the tunnel outer surface so that when the water stop seal 31 is expanded in diameter, the water stop seal 31 uniformly contacts the tunnel outer surface. The main tunnel and the branch tunnel B
Even when a three-dimensional curved surface such as a seam in the case of providing a water stop portion 3 is attached corresponding to the curved surface, a portion where the water stop portion 3 does not contact the curved surface. And water can be reliably stopped.

Further, since the surface of the enlarged diameter bar 42 which contacts the water stop seal 31 has an arc shape, the pushing-up force of the diameter enlarged bar 42 acts on the water stop seal 31 evenly, so that the water stop can be reliably stopped. And water can be reliably stopped without generating voids and the like even under high water pressure.

Further, since a uniform pressing force is always applied to the water seal 31, the pressing force is applied to a specific portion and the rubber 31 b
Will not be damaged.

In addition, assembling the segment 1 with the water stopping device, a step of assembling the starting port side ring 2 at a joint portion of the main line section tunnel A of the branching section tunnel B, and attaching the water stopping section 3 to the starting port side ring 2 It comprises a step of attaching and a step of attaching the face side ring 4 to the water stopping part 3, and the water stopping part 3 can be attached during the assembly of the segment.

Although the starting ring 2 is made of steel in this embodiment, the starting ring 2 may be made of any other material.
Of course, it may be made of concrete. As the material of the face side ring 4, a material made of steel is used in the present embodiment, but it is needless to say that a material made of concrete may be used. In addition, the number of segments of the water-stop device-equipped segment is 13 in the above embodiment, but is not limited to this, and it is a matter of course that the number of segments can be changed as appropriate in accordance with the scale of the tunnel. In this embodiment, the water-stop seal used was a rubber reinforced by putting a steel plate. However, rubber alone may be used.In addition, the water-stop seal can be expanded by the expanding force of the expanding bar. What is necessary is just to have an adhesive property when it comes into contact with an external surface.

[0043]

According to the first aspect of the present invention, a tunnel is provided.
In the branching section, the gap between the water-stop device-equipped segment and the outer surface is stopped by the water-stop seal, and the push-up pressure can be kept constant by adjusting the push-out means.
In addition, since the segment with the water stop device of the present invention is configured by being divided into the start port side ring, the water stop section, and the face side ring, after excavation is completed in the branch tunnel construction, the segment protrudes into the main line section tunnel pit. The start side ring can be removed without affecting the water stop function.

According to the second aspect of the present invention,
When the diameter of the water-stop seal is increased, the water-stop seal is provided corresponding to the shape of the external surface so as to abut on the external surface. Even for a three-dimensional curved surface such as a joint at the joint, the water stop portion will be attached corresponding to the curved surface, so there is no place where the water stop does not abut the curved surface, The water can be stopped.

According to the third aspect of the present invention, the pushing-up force of the diameter-enlarging bar uniformly acts on the water-stop seal, so that the water can be reliably stopped and voids and the like can be formed even under a high water pressure. Water can be reliably stopped without generating water. Further, for example, when rubber is used as the water-stop seal, a uniform pressing force is always applied to the water-stop seal, so that the rubber is not damaged due to the pressing force being applied to a specific portion. .

According to the fourth aspect of the present invention, the water stop portion can be easily attached during the assembly of the segment.

[Brief description of the drawings]

FIGS. 1A to 1G are front views (a) to (g) and bottom views (h) to (n) of a segment with a water stopping device according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view of a segment of a portion L in FIG.

FIG. 3 is a cross-sectional view of a segment of a portion H in FIG. 1 (k).

FIG. 4 is a longitudinal sectional side view (a) of a diameter-enlarging bar 33 in a circumferential direction;
It is a bottom view (b) and a front view (c).

5A and 5B are a side view of the branch tunnel B and a cross-sectional view of the main line tunnel A in the circumferential direction when the segment with the water stop device is mounted on the branch tunnel.

FIG. 6 is a sectional view in the circumferential direction when the water-stopping device-equipped segment is assembled.

FIG. 7 is a cross-sectional view in a longitudinal direction of a top (top end) of a branching tunnel before sealing.

FIG. 8 is a cross-sectional view in the longitudinal direction of the top (top end) of the branching tunnel after sealing.

FIG. 9 is a horizontal cross-sectional view of a branch portion tunnel side portion before sealing.

FIG. 10 is a horizontal cross-sectional view of the side of the branch portion tunnel after sealing.

FIG. 11 is a circumferential sectional view of a junction tunnel at a joint after sealing.

FIG. 12 is a perspective view showing an example of a tunnel structure in a case where a branching shield starts on the side of the main line tunnel from the inside of the main line tunnel by the underground stalk method to construct a branch tunnel.

FIG. 13 is a side view of the junction between the main line tunnel and the branch tunnel in the direction of the branch tunnel when the branch shield starts.

FIG. 14 is a side view of the joint between the main line tunnel and the branch tunnel in the branch tunnel direction when the branch tunnel is constructed.

FIG. 15 is a cross-sectional view of a “water-blocking segment” disclosed in Japanese Patent Laid-Open No. 4-76197 in a longitudinal direction of a tunnel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Segment with water stop device 2 Start side ring 3 Water stop part 4 Face side ring 31 Water stop seal 41 Large diameter bar 42 Large diameter bolt

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroo Iso 2570-4 Shimotsuruma, Yamato-shi, Kanagawa Prefecture Nishimatsu Construction Co., Ltd. (72) Inventor Yasushi Kuwahara 3072 Ogami, Hiratsuka-shi, Kanagawa Prefecture Nishimatsu Construction Hiratsuka Mfg. Co., Ltd. (72) Inventor Soichiro Ueda 9-30-30 Wakamatsu-cho, Nagata-ku, Kobe City, Hyogo Prefecture Inside (72) Inventor Akio Tamen 9-30-30, Wakamatsu-cho, Nagata-ku, Kobe City, Hyogo Prefecture Rubber Co., Ltd. (56) References JP-A-2-225798 (JP, A) JP-A-7-197790 (JP, A) Jiko 60-42158 (JP, Y2) (58) Fields surveyed (Int .Cl. ⁷ , DB name) E21D 11/04 E21D 11/38

Claims (4)

(57) [Claims] 1. A segment with a water-stop device, which is obtained by dividing an annular body used for water-stop between a tunnel and an outer surface of the tunnel in shield work or the like, and is attached to a start port side of the tunnel. A starting-port-side ring, a face-side ring attached to the face-side of the tunnel, and a water-stop portion attached at an intermediate position between the start-port-side ring and the face-side ring. The curved surface at the joint between the main line tunnel and the branch tunnel
An endless annular body is formed on the outer peripheral surface when assembled to the annular body according to the shape, and when the diameter is increased, a water-stop seal capable of contacting the outer surface is provided. An expanding bar that is provided separately on the inner peripheral portion of the seal and that can expand and expand the water-stop seal by pushing out, and an extruding unit that can push out or pull in the expanding bar. A segment with a water stop device, characterized by having an enlarged portion comprising: 2. The water stopping portion is provided corresponding to the shape of the outer surface of the tunnel so that the water stopping portion comes into contact with the outer surface of the tunnel when the water stopping seal is expanded in diameter. The segment with a water stop device according to claim 1. 3. The segment with a water stopping device according to claim 1, wherein a surface of the diameter-enlarging bar in contact with the water stopping seal has an arc shape. 4. The method for assembling a segment with a water stopping device according to claim 1, wherein a first step of attaching the starting port side ring to a predetermined position; A method for assembling a segment with a water stopping device, comprising: a second step of attaching the water stopping section; and a third step of attaching the face-side ring to the starting port side ring or the water stopping section.