JP2003328381A - Flexible rubber joint and its mounting structure and its constructing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel flexible rubber joint and its mounting structure and its constructing method. <P>SOLUTION: The flexible rubber joint 10 is arranged along a connection portion of a can. It comprises an integral unit formed by a flexible curved portion 11 ranging in the longitudinal direction, a pair of bottom plate portions extending from its bottom and ranging in the longitudinal direction and a pair of side wall portions 13 extending from its end to a direction y of protrusion of the curved portion and ranging in the longitudinal direction. The flexible rubber joint 10 is used with both longitudinal ends tied to each other in the form of a ring using a top 11a of the curved portion as the inside thereof. Self-supporting rigidity is granted to the ring by pressure plates 21 mounted along the peripheral direction, a connection plate for fixing the adjacent pressure plates 21 to each other, a space holding material for fixing an angle formed by the pair of bottom plate portions 12 and a reinforcing material for retaining the shape of the whole ring. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible rubber joint used for stopping water at a connecting portion in an underground structure formed by connecting boxes such as a common ditch, a subway, an underground road and an underground parking lot. And its mounting structure and its construction method.

[0002]

2. Description of the Related Art Underground structures such as common ditch, subway, underground road, underground parking lot, etc., which are formed by an excavation method are generally ones in which boxes for partitioning an underground space are connected.
Water is stopped by a flexible rubber joint at the connecting portion of the box. As a specific example of the connecting structure of the underground structure using such a flexible rubber joint, for example, the one shown in FIG. 9 can be cited. The connection structure of the underground structure in this example is
A pair of metal frames 61 each having a substantially L-shaped cross section are arranged as shown in FIG. 9 (b), and a waterproof rubber having an approximately Ω-shaped cross section is provided in a mounting groove 62 defined by the metal frames 61. The member 63 is arranged. Anchor bolts 64 are penetrated through the waterproof rubber member 63, and the anchor bolts 64 are embedded in a concrete body 76 to be integrated with a box body 80 that defines an underground space 77. Note that FIG. 9B is a view as seen from the arrow FF of FIG. 9A. Figure 9
Reference numeral 65 in (b) indicates a pressing plate to be interposed between the nut used in combination with the anchor bolt 64 and the waterproof rubber member 63. Reference numeral 78 indicates a joint material.

As shown in FIG. 9 (a), the above-mentioned connecting structure is usually formed after a pair of metal frame bodies 61 to which a waterproof rubber member 63 is attached are erected in an open channel. . That is, after leveling concrete (discarded concrete 72) is placed on the bottom surface of the open channel 71 obtained by excavating the ground 70, the horizontal and vertical positions are adjusted by the leveling bolts 73, and the steel sheet pile 75 is supported by the support work 74. The flexible rubber joint 60 is erected in the open conduit 71 by fixing the flexible rubber joint 60 to the open conduit 71. Next, a mold (not shown) is assembled along the metal frame 61, and concrete is poured into the mold, whereby the mold shown in FIG.
The connected structure shown in (b) is formed. Note that FIG. 9A shows the flexible rubber joint 60 in a simplified manner, in which the waterproof rubber member 63 is omitted and only the metal frame 61 is shown.
Reference numeral 79 in FIG. 9 (a) indicates a water-expandable rubber which is located between the concrete body 76 and the metal frame body 61 to prevent water leakage between them.

[0004]

According to the rubber joint shown in FIG. 9 (b), since the L-shaped steel defines the mounting groove 62 for accommodating the waterproof rubber member, it can be installed in an underground space. The effect that the protrusion of the flexible rubber joint 60 is prevented is obtained. However, the L-shaped steel is a specially shaped steel, and it is necessary to perform bending or the like on commercially available steel, so that the manufacturing cost is high, and as a result, the construction cost of the excavation tunnel is also high. Further, it is difficult to design the L-shaped steel according to the size required for the mounting groove 62 from the viewpoint of manufacturing cost and the like. Moreover, when the mounting groove 62 is formed by a substantially L-shaped metal frame body, as shown in FIG.
The bottom of is horizontal. In this case, air bubbles 81 are likely to be generated due to air bubbles generated during concrete construction, which may lead to a reduction in the water blocking function. Therefore, the air pocket 8
Although it is necessary to completely eliminate the No. 1, it is very difficult due to the structure of the metal frame.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a new flexible rubber joint capable of significantly reducing the cost required for construction of an excavation tunnel while exhibiting an excellent water-stopping function, and its And a mounting structure and a construction method.

[0006]

MEANS FOR SOLVING THE PROBLEM AND EFFECTS OF THE INVENTION A flexible rubber joint according to the present invention for solving the above-mentioned problems has (I)
It is arranged along the connecting portion of the box that defines the underground space, and the flexible curved portion that is continuous in the longitudinal direction of the flexible rubber joint, and the hem portions on both sides of the curved portion respectively A pair of substantially plate-shaped bottom plate portions that extend outward and are continuous in the longitudinal direction, and a pair of substantially plate-shaped side wall portions that extend in the protruding direction of the curved portion from the tip of the bottom plate portion and that are continuous in the longitudinal direction. ,
Or (II) is arranged along the connecting portion of the box that divides the underground space, and is flexible in the longitudinal direction of the flexible rubber joint. A rubber joint main body integrally formed with a curved portion and a pair of substantially plate-shaped bottom plate portions that extend outward from the hem portions on both sides of the curved portion and are continuous in the longitudinal direction, and A pressing plate that also serves as a form and that is arranged on the bottom plate part of the rubber joint body, wherein the pressing plate is a pressing plate body part that is arranged on the curved surface of the bottom plate part, and the tip side of the bottom plate part. And a form frame portion that is continuous with the pressing plate body portion and extends in the protruding direction of the bending portion.

The flexible rubber joint of the above (I) (hereinafter referred to as "first flexible rubber joint") and the flexible rubber joint of the above (II) (hereinafter referred to as "second flexible rubber joint"). .) Each have a flexible curved portion that is continuous in the longitudinal direction, and a pair of bottom plate portions that are integrally connected to the curved portion and that extend in the longitudinal direction while extending outward from the skirt portion thereof. ing. Therefore, the curved portion is arranged so as to project to the inner side of the underground space partitioned by the box body and along the connecting portion of the adjacent box bodies, and further, the pair of bottom plate portions face each other. By connecting with the body, it is possible to stop the water at the connection part, and the displacement of the adjacent boxes due to the deformation of the ground caused by an earthquake or the like, or the distance between the boxes changes. Even if it does, (ie, shearing between boxes,
Even if deformation such as stretching or compression occurs, the curved portion can be easily deformed by following displacement such as displacement.
As a result, according to the flexible rubber joint of the present invention, it is possible to maintain a sufficient water blocking function even if such displacement occurs.

The substantially plate-shaped bottom plate portion of the first flexible rubber joint further includes a substantially plate-shaped side wall portion that extends in the protruding direction of the curved portion from its tip and is continuous in the longitudinal direction, In the second flexible rubber joint, the pressing plate disposed on the surface of the bottom plate portion on the curved portion side extends in the protruding direction of the curved portion from the tip end side of the bottom plate portion and is continuous in the longitudinal direction. It has a section. That is, in the first flexible rubber joint, a pair of bottom plate portions extending outward with the curved portion sandwiched therebetween and a pair of side wall portions extending from the tips of the bottom plate portions are formed in a substantially L-shaped cross section. In the second flexible rubber joint, a pair of bottom plate portions extending outward with the curved portion sandwiched therebetween, and a pair of frame parts connected to the pressing plate portion and extending from the tip end side of the bottom plate portion are substantially L-shaped in cross section. Are arranged in a shape. As a result, in both the first and second flexible rubber joints, the flexible rubber joint as a whole is a substantially box-shaped member having the bottom plate portion as the bottom surface.

Therefore, the curved portions of the first and second flexible rubber joints are arranged so as to project toward the inner side of the underground space defined by the box and along the connecting portion of the adjacent boxes. When arranged in such a manner, the pair of bottom plate portions, the pair of side wall portions or the mold frame portion, and the curved portion form two recessed lines extending along the connecting portion of the box body. therefore,
Unlike the conventional connecting structure shown in FIG. 9, even if an expensive L-shaped steel is not used, a flexible rubber joint can be attached to the connecting portion to secure a space for accommodating the curved portion.

Further, the portion having a substantially L-shaped cross section defined by the pair of bottom plate portions and the pair of side wall portions or the mold portion constitutes a flexible rubber joint and, at the same time, connects the boxes. It can also be used as a weir plate when pouring concrete to form the portion. That is, unlike the conventional connection structure shown in FIG. 9, installation of a flexible rubber joint and placement of concrete can be performed without using expensive L-shaped steel.

By the way, the present applicant has previously found that the cross section is substantially U-shaped.
Of the curved portion 67 and the opening end 68 of the curved portion 67 are integrally connected.
Subsequently, the curved portion 67 is sandwiched and fixed in a substantially V-shaped cross section.
A flexible rubber joint 66 including a pair of flange portions 69;
Proposed (Japanese Patent Application No. 2000-361335). Scarecrow
According to the flexible rubber joint 66 (see FIG. 10),
Injecting part 69 is also used as a weir plate when pouring concrete.
This allows flexible rubber joints without the use of metal molds.
Can achieve both hand construction and concrete pouring
It In FIG. 10, reference numeral 82 indicates that the sealing material 84 moves.
Locking of the flexible rubber joint 66 formed to prevent
The reference numeral 83 is a cavity defined by the curved portion 67.
Are shown respectively. According to the above flexible rubber joint, metal
Significantly reduce construction costs by not using a frame
Can be attached, but a pair fixed in a V-shaped cross section
Since only the flange part of the
The angle θ between the pair of flanges 69 _pIs inevitably narrow
As a result, for example, the flange portion 69 is fixed to the anchor bolt.
The work space when tightening with 64 becomes narrow
I have a problem.

On the other hand, according to the first and second flexible rubber joints of the present invention, not only the bottom plate portion corresponding to the pair of flange portions but also the side wall portion or the bottom plate connected to the tip of the bottom plate portion is connected. The mold part of the pressing plate that is fastened to the part can also be used as a dam plate when pouring concrete. Therefore, it is not necessary to narrow the angle formed between the pair of bottom plate portions, and a sufficient working space can be secured when the bottom plate portion is fastened with the anchor bolts, for example.

In the first and second flexible rubber joints of the present invention, the cross-sectional shape of the curved portion is not particularly limited, and various curved shapes such as a substantially inverted U-shape, a substantially M-shape, and a wavy shape can be used. The shape can be adopted. Above all, it is preferable that the curved portion has a substantially inverted U-shaped cross section as shown in FIG. In this case, the structure of the bending portion becomes simple, and even when water pressure is applied, the bending portion is prevented from protruding toward the underground space (inside the tunnel) defined by the box. can do.

In the first flexible rubber joint of the present invention,
In a cross section orthogonal to the longitudinal direction of the flexible rubber joint, it is preferable that the apex of the curved portion is closer to the hem side of the curved portion than the position connecting the tips on the apex side of the pair of side wall portions. Similarly, in the second flexible rubber joint of the present invention, in the cross section orthogonal to the longitudinal direction of the flexible rubber joint, the apex of the curved portion is a position connecting the apexes on the apex side of the pair of mold parts. It is more preferable to be on the hem side of the curved portion. In these cases, it is possible to prevent the curved portion of the flexible rubber joint from protruding to the inner wall surface side of the box body, and at the connecting portion of the box body, a pair of bottom plate portions and a pair of side wall portions or form parts are formed. The curved portion can be housed in the space defined by.

In the first and second flexible rubber joints of the present invention, the angle θ (see FIGS. 1 (b) and 7 (b)) formed between the surfaces of the pair of bottom plate portions sandwiching the curved portion is 120
It is preferably not less than 180 ° and less than 180 °. As described above, according to the flexible rubber joint of the present invention, it is not necessary to narrow the angle formed by the pair of bottom plate portions on the surfaces sandwiching the curved portion.
Therefore, the angle θ may be 180 ° (that is, the pair of bottom plate portions may be on the same plane). However, when the pair of bottom plate portions are substantially on the same plane, bubbles generated during concrete pouring may stay on the surface of the bottom plate portion to form an air pocket. Therefore,
It is preferable that the angle formed by the pair of bottom plate portions on the surfaces sandwiching the curved portion is set within the above range so that the bottom plate portions have a constant inclination.

The angle θ is 12 in the above range.
It is preferably 0 ° or more and 170 ° or less, and 130 °
It is more preferable that the angle is in the range of ≧ 160 °. By setting the angle θ to 170 ° or less, it is possible to automatically remove bubbles generated during concrete pouring, and it is possible to sufficiently suppress the generation of air pools that cause water leakage. On the other hand, if the angle θ is less than 120 °, for example, there is a possibility that a work space for fastening the bottom plate portion with the anchor bolt cannot be sufficiently secured.

In the first and second flexible rubber joints of the present invention, it is preferable to dispose water-expanded rubber or unvulcanized rubber on the surface of the bottom plate portion that is in contact with the cast concrete. In this case, the cast concrete,
It is possible to more reliably prevent water leakage from occurring between the flexible rubber joint and the bottom plate portion, and it is possible to further improve the water shutoff of the flexible rubber joint.

The mounting structure of the flexible rubber joint according to the present invention is (I) The first flexible rubber joint according to the present invention is used alone or in combination of two or more, and its longitudinal ends are curved. It is formed by connecting in a loop so that the top of the part is on the inside, and a pressing plate is attached to the surface of the bottom plate forming the inner peripheral surface of the loop at a predetermined interval along the circumferential direction. The loop fixes the gap between the connecting plate for fixing the pressing plates adjacent to each other in the circumferential direction, the distance between the bottom plates facing each other across the curved portion, and the angle formed by the pair of bottom plates. And a reinforcing member for holding the shape of the entire loop, which provides self-standing rigidity, or (II) a second flexible rubber joint according to the present invention. Used alone or in combination of two or more, the same in the longitudinal direction And be one apex of the curved portion is by connecting to the loop such that the inner,
The loop fixes a gap between a connecting plate for fixing the pressing plates that also serve as molds adjacent to each other in the circumferential direction, a bottom plate portion facing each other across the curved portion, and an angle formed by the pair of bottom plate portions. And a reinforcing material for retaining the shape of the entire loop, which provides rigidity that enables self-standing.

According to the above-mentioned flexible rubber joint mounting structure,
Since the first or second flexible rubber joints are joined together at their longitudinal ends to form a loop, there is no risk of water leakage from the joints between the flexible rubber joints. In the attachment structure of the flexible rubber joint, as in the case of constructing a conventional flexible rubber joint, in the case of the first flexible rubber joint according to the present invention, the ends in the longitudinal direction thereof are
In the case of the second flexible rubber joint according to the present invention, the longitudinal ends thereof are vulcanized and bonded together. By vulcanizing and adhering the end portions to each other in this manner, water leakage from the joint between the flexible rubber joints is reliably prevented.

Further, in the above-mentioned structure for mounting the flexible rubber joint, the bottom plate portion of the first flexible rubber joint or the bottom plate portion of the rubber joint body of the second flexible rubber joint is formed in the loop formed of the flexible rubber joint. The pressing plates are respectively arranged on the pressing plates, and the pressing plates are connected to each other by fixing the connecting plates to each other, and the space holding member for fixing the space between the pair of bottom plate portions, the beam, or the like. A reinforcing material as a girder is arranged. By arranging these members,
The loop is provided with rigidity and thus retains the shape of the loop itself. That is, even when the connecting portion of the underground structure is formed by using the rubber joint of the present invention, which exhibits flexibility as a whole, the rigidity of the loop made of the flexible rubber joint is increased without using the metal frame body. The flexible rubber joint can be made to stand on its own in the open channel by this.

According to the first method for constructing a flexible rubber joint of the present invention, a pressing plate is attached to the bottom plate portion of the first flexible rubber joint according to the present invention, and the flexible rubber joint is further attached in the longitudinal direction. The connecting plate is attached between adjacent pressing plates to connect and fix the pressing plates together, and the flexible rubber joint is connected so that the top side of the curved portion is on the inner side to form a loop. Alternatively, a spacing member is attached to the connecting plate to fix the spacing between the bottom plate portions facing each other across the curved portion and the angle formed by the pair of bottom plate portions, and then (a)
A step of attaching a reinforcing material to the loop to maintain the shape of the loop, and (b) a step of standing the loop in the open channel,
In this order or in the reverse order, further, by placing concrete using the bottom plate portion and the side wall portion of the flexible rubber joint as a weir plate, after the concrete is hardened, the connecting plate, the spacing member And that the reinforcing material is removed.

On the other hand, according to the second flexible rubber joint construction method of the present invention, a pressing plate which also serves as a weir plate is arranged on the bottom plate portion of the second flexible rubber joint of the present invention, and the flexible rubber joint is further applicable. While connecting and fixing the connecting plates between the pressing plates that are adjacent to each other in the longitudinal direction of the flexible rubber joint to connect and fix the pressing plates, the flexible rubber joint is connected so that the top side of the curved portion is the inner side to form a loop. After forming, a spacing member is attached to the pressing plate or the connecting plate to fix the spacing between the bottom plate portions facing each other across the curved portion and the angle formed by the pair of bottom plate portions, and then (i) the loop. The step of attaching a reinforcing member to maintain the shape of the loop, and (ii) the step of standing the loop in the open channel are performed in this order or in the reverse order, and the bottom plate of the flexible rubber joint is further performed. Part and the mold part of the pressing plate as a weir plate. And Da設 the REITs, after which the concrete has cured, characterized by detaching said connecting plate, spacing the holding member and the reinforcing member.

According to the above-mentioned construction method of the present invention, the shape of the loop made of the flexible rubber joint of the present invention is prepared by previously attaching the pressing plate, the connecting plate, the spacing member and the reinforcing member to the bottom plate portion. In addition to holding the flexible rubber joint, the bottom plate portion of the flexible rubber joint and the side wall portion or the frame portion of the pressing plate are also used as a dam plate during concrete pouring. It is not necessary to use an L-shaped metal frame that also serves as a barrier plate and a member that imparts rigidity to the rubber joint, and a flexible rubber joint can be constructed by a simple method and at low cost. You can

Further, since the flexible rubber joint of the present invention has the side wall portion or the frame portion of the pressing plate, it is not necessary to form the weir plate by only the pair of bottom plate portions (flange portions), and therefore, the Japanese Patent Application Unlike the flexible rubber joint described in 2000-361335, it is not necessary to narrow the angle formed by the pair of bottom plate portions (flange portions) across the curved portion. As a result, it is sufficient that the bottom plate portion is provided with an inclination to facilitate the removal of air bubbles as needed, and the work at the time of constructing the flexible rubber joint as the angle formed becomes narrower. It is possible to prevent the problem that the space becomes small. In addition, in the above-mentioned construction method, as in the case of constructing a conventional flexible rubber joint, in the case of the first flexible rubber joint according to the present invention, the longitudinal end portions thereof are related to each other according to the present invention. In the case of the second flexible rubber joint, the longitudinal ends thereof are vulcanized and bonded together. By vulcanizing and adhering the end portions to each other in this manner, water leakage from the joint between the flexible rubber joints is reliably prevented.

In the above-mentioned construction method, it is preferable that after removing the connecting plate, the spacing member and the reinforcing member, the anchor bolt is tightened and the bottom plate portion is pressed against the cast concrete. By performing re-pressing in this way, so-called retightening, it is possible to further improve the adhesion between the concrete structure and the bottom plate portion of the flexible rubber joint, and as a result, further improve the waterproofness. Can be increased.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a flexible rubber joint according to the present invention will be described in detail with reference to the drawings. [First Flexible Rubber Joint] The first flexible rubber joint according to the present invention is, for example, as shown in FIGS. 1 (a) and 1 (b), a substantially U-shaped curved section which is continuous in the longitudinal direction x. The parts 11, a pair of substantially plate-shaped bottom plate parts 12 extending outward from the hem parts 11b on both sides thereof and continuous in the longitudinal direction x, and a tip 12 of the bottom plate part 12.
A pair of substantially plate-shaped side wall portions 13 extending from a in the protruding direction y of the curved portion 11 and continuous in the longitudinal direction x are integrally formed.

The curved portion 11 is required to prevent water leakage into the underground space defined by the box body, and at the same time, to be easily deformed by following displacement displacement between the box bodies.
For example, chloroprene rubber (CR) and butadiene rubber (B) having excellent aging resistance, weather resistance, ozone resistance, elasticity, etc.
R), ethylene-propylene-diene rubber (EPD
M), rubber such as natural rubber (NR), or an elastomer or a mixture thereof.

Since the bottom plate portion 12 and the side wall portion 13 are continuously formed with the curved portion 11 and are integrally formed, they are usually formed of the same material as the curved portion 11. However,
Since the side wall portion 13 is subjected to the placing pressure of concrete due to its function, it is necessary to set the rigidity to be large in order to prevent the deformation due to the placing pressure. The side wall portion 13 is
In order to prevent the deformation, the length h from the tip 12a of the bottom plate 12 to the tip 13a of the side wall 13 is preferably set within 100 mm, and the thickness t of the side wall 13 is 15 m.
It is preferably set to m or more.

Curved portion 11, bottom plate portion 12 and side wall portion 13
In any of the above, a reinforcing base cloth can be placed inside for the purpose of improving pressure resistance. Although not shown, it is preferable to put a reinforcing base cloth especially on the bottom plate portion 12 and the side wall portion 13. When reinforcing base cloth is put in, the bottom plate part 1
In No. 2, it is possible to prevent the bottom plate portion 12 from cracking or propagating in the vicinity of the through hole 15 through which the anchor bolt or the like is inserted, and prevent the crack from propagating, thereby preventing the deterioration of the water blocking performance. Various conventionally known base fabrics can be adopted as the reinforcing base fabric. The orientation of the reinforcing base fabric is not particularly limited, but in order to prevent wrinkles from occurring when shear deformation is applied to the bottom plate part, etc., it is not a cross structure but a radial with more durability. The structure is preferable.

In the flexible rubber joint 10 shown in FIG. 1, locking portions 11c extending from the open end of the bending portion 11 to the inside of the bending portion 11 are provided. As shown in FIG. 2, for example, a joint material 78 for burying a gap between adjacent concrete bodies 76 is laid at the connecting portion of the box body, and a locking portion 11c is provided at the hem portion 11b of the curved portion. In this case, it becomes easy to prevent the joint material 78 and the sealing material 84 from entering the space defined by the curved portion 11.

The flexible rubber joint 10 shown in FIG. 1 (b) is a sectional view in a section orthogonal to the longitudinal direction x. In this flexible rubber joint 10, the apex portion 11 a of the curved portion 11 is the apex portion 1 of the curved portion of the pair of side wall portions 13.
The hem portion 1 of the curved portion is more than the position connecting the tip 13a on the 1a side.
It is designed to be placed on the 1b side. As a result, the curved portion 11 of the flexible rubber joint 10 can be prevented from protruding toward the inner wall surface of the box body (see the concrete body 76 in FIG. 2), and the pair of bottom plate portions 12 at the connecting portion of the box body can be prevented.
The curved portion 11 can be housed in a space defined by the pair of side wall portions 13.

In the flexible rubber joint 10 shown in FIG. 1, a water expansion rubber 14 is provided on the back surface of the bottom plate portion 12 (the surface opposite to the side where the curved portion 11 projects). in this way,
By providing the water expansion rubber 14 on the back surface of the bottom plate portion 12, it is possible to more reliably prevent water leakage from occurring between the flexible rubber joint 10 and the concrete body 76. As shown in FIG. 2, the bottom plate portion 12 is fastened on the concrete body 76 by the pressing plate 21 and the anchor bolts 16 attached to the surface thereof. Therefore, the flexible rubber joint 10
In order to achieve the same purpose of preventing water from leaking from between the concrete body 76 and the concrete body 76, an unvulcanized rubber having a high deformability due to pressure may be laid in place of the water expansion rubber 14.

In the flexible rubber joint 10 shown in FIG. 1, after the pressing plate 21 is attached to the surface of the bottom plate portion 12 using the anchor bolt 16, the connecting plate 22 is attached between the pressing plates 21 and at least one or two or more. The flexible rubber joint 10 is formed in a loop shape by connecting the ends thereof. Also,
An interval holding member 24 for fixing the distance between the pair of bottom plate portions 12 and the angle θ (see FIG. 1B), and a reinforcing member 25a for holding the entire shape of the loop 20 composed of the flexible rubber joint 10. , 25b to the pressing plate 21 (or to the connecting plate 22), for example, as shown in FIG.
As shown in (b), the loop 2 composed of the flexible rubber joint 10
0 can stand on its own.

FIG. 4 shows a state in which the connecting plate 22 is fixed between the pressing plates 21. FIG. 4 (a) is a sectional view taken along the line AA of FIG. 3 (a). In FIG. 4, the reference numeral 23 indicates the pressing plate 21 and the connecting plate 22.
Shows a bolt for fixing the. Figure 4 (b) is the same figure.
FIG. 4A is a view on arrow B of FIG. 4A, while FIG. 4A is C of FIG. 4B.
FIG. That is, FIG. 4 (a) is a cross-sectional view of the joint portion of the adjacent pressing plates 21. As shown in FIG. 4, by attaching the connecting plate 22 between the pressing plates 21, the rigidity of the loop 20 formed of the flexible rubber joint 10 in the outer peripheral direction is secured.

FIG. 5 shows a state in which the spacing member 24 is attached to the pressing plate 21. FIG. 5 is a sectional view taken along line DD of FIG. As shown in FIG. 5, the spacing member 24 is actually fixed by using anchor bolts 16 for attaching the pressing plate 21 to the bottom plate portion 12. As shown in FIG. 5, by mounting the spacing member 24 between the pair of bottom plate portions 12, the rigidity in the cross-sectional direction of the flexible rubber joint 10 is secured.

Similarly, FIG. 6 shows a state in which the reinforcing member 25b is attached to the pressing plate 21 (specifically, the anchor bolt 16 for attaching the pressing plate 21 to the bottom plate portion 12). FIG. 6 is a sectional view taken along line EE in FIG. Although FIG. 6 shows the mounting structure of the reinforcing member 25b that serves as the girder of the loop 20, this mounting structure is the same for the reinforcing member 25a that serves as the beam of the loop 20. As shown in FIG. 6, the reinforcement of the entire loop 20 is secured by attaching the reinforcing members 25a and 25b serving as the beams and the girders inside the loop 20 formed of the flexible rubber joint 10.

As shown in FIGS. 4 to 6, the connecting plate 2
2. By attaching the spacing member 24 and the reinforcing members 25a and 25b, the rigidity of the loop 20 in the outer peripheral direction, the rigidity of the flexible rubber joint 10 in the cross-sectional direction, and the rigidity of the entire loop 20 are secured. As described above, the loop 20 to which the rigidity is imparted can be set up in a self-supporting manner in the open conduit forming the connecting portion. When forming the connection part of the box that divides the underground space, loop 2
0 as shown in FIG.
After determining the installation position, etc., the bar arrangement, inner formwork 27,
After performing the formwork such as the outer formwork 28 (see FIG. 2),
Just pour concrete.

After the placing of the concrete bodies 76 on both sides through the joint material 78 is completed, in order to prevent the occurrence of cracks due to hardening shrinkage of the concrete bodies 76, the connecting plate 22, the spacing member 24, and Reinforcement 25a,
25b is removed. After that, preferably, the bottom plate portion 1 is applied to the cast concrete (concrete body 76).
So-called retightening is applied to press the 2 again. This makes it possible to further improve the adhesion between the concrete structure and the bottom plate portion of the flexible rubber joint.

[Second Flexible Rubber Joint] Second embodiment according to the present invention
The flexible rubber joint of is, for example, as shown in FIGS. 7 (a) and (b),
A curved portion 31 having a substantially inverted U-shaped cross section that is continuous in the longitudinal direction x, and a pair of substantially plate-shaped bottom plate portions 32 that extend outward from the hem portions 31b on both sides thereof and that are continuous in the longitudinal direction x are integrated. Rubber joint body 33 and bottom plate portion 32
The pressing plate 41 that also serves as a form and is arranged in a shape is provided.

The curved portion 31 of the rubber joint main body 33 is required to prevent water leakage into the underground space defined by the box body, and at the same time, to be easily deformed by following a displacement displacement between the box bodies. Therefore, it is formed of the same rubber, elastomer, or mixture thereof as the bending portion 11 of the first flexible rubber joint 10 described above.

The bottom plate portion 32 of the rubber joint main body 33 has the curved portion 3
Since it is connected to 1 and is integrally formed, it is usually formed by using the same material as the bending portion 31.
However, for the purpose of improving the pressure resistance, similar to the bending portion 12 of the first flexible rubber joint 10 described above,
You may have a reinforcement base fabric in the inside. Examples of the reinforcing base fabric that can be used include the same as those exemplified for the first flexible rubber joint. In the flexible rubber joint 30 shown in FIG. 7, the configuration, action, effects, etc. of the locking portion 11c provided on the skirt portion 31b of the curved portion and the water-expandable rubber 14 provided on the back surface of the bottom plate portion 32 are described. Are the same as the flexible rubber joint 10 shown in FIG.

The flexible rubber joint 30 shown in FIG. 7 (b) is a sectional view in a section orthogonal to the longitudinal direction x. In this flexible rubber joint 30, the apex portion 31a of the bending portion 31 is closer to the position than the position where the tip portions 13a of the pair of pressing plates 41 on the apex portion 31a side of the bending portion are connected.
It is designed to be arranged on the hem portion 31b side of the curved portion. As a result, it is possible to prevent the curved portion 31 of the flexible rubber joint 30 from projecting to the inner wall surface side of the box body (see the concrete body 76 in FIG. 8), and the pair of bottom plate portions 32 at the connecting portion of the box body. The curved portion 31 can be housed in a space defined by the pair of frame portions 43.

The flexible rubber joint 30 shown in FIG.
It is fastened on the concrete body 76 by the pressing plate 41 and the anchor bolt 16 attached to the surface of the second body (see FIG. 8). The pressing plate 41 includes the curved portion 3 of the bottom plate portion 32.
A substantially plate-shaped pressing plate body portion 42 arranged on the surface on the first side,
The tip 32a of the bottom plate 32 is connected to the holding plate body 42.
And a mold part 43 extending from the side. The mold frame portion 43 corresponds to the side wall portion of the first flexible rubber joint according to the present invention. The side wall portion of the first flexible rubber joint is
Since it is formed integrally with the bottom plate portion and the like of the first flexible rubber joint, it is formed of rubber or elastomer, whereas it is formed of the mold portion of the second flexible rubber joint 30. 42 is a member separate from the curved portion 31 and the bottom plate portion 32. Therefore, the material is not particularly limited as long as it can function as a form (barrier plate) or a pressing plate, and in addition to rubber, wood, resin,
It may be made of metal or the like.

In the flexible rubber joint of the present invention, after the concrete is cast, the pressing plate is retightened to the bottom plate side again, so that the concrete body and the bottom plate part are completely adhered to each other. At the time of re-tightening, it is necessary to have a function of allowing the mold part 43 of the mold / press plate 41 to move between the mold part 43 and the surface of the concrete body 76. Therefore, as shown in FIG. 8, a mold release material 44, which is made of a material having poor adhesion to concrete such as unvulcanized butyl rubber, is provided on the surface of the mold part 43, which serves as a barrier when pouring concrete. It is preferable to perform so-called edge cutting.

In the flexible rubber joint 30 shown in FIG. 7, the pressing plate 41 is attached to the surface of the bottom plate portion 32 using the anchor bolts 16, and then the connecting plate is attached between the pressing plate body portions 42 to form 1 or 2 pieces. The flexible rubber joint 30 is connected at its ends to form a loop. The distance between the pair of bottom plates 32 and the angle θ (see FIG. 7 (b))
By attaching a spacing member for fixing the space and a reinforcing material for holding the shape of the entire loop made of the flexible rubber joint 30 to the pressing plate body portion 42 (or to the connecting plate), Similar to the loop made of the flexible rubber joint, it is possible to impart rigidity to the loop to make it self-supporting.

The attachment structure and attachment method of the connecting plate, the spacing member and the reinforcing member to the flexible rubber joint 30 are the same as the attachment structure and attachment method of the first flexible rubber joint described above (see FIGS. This may be performed (similarly to the case shown in FIG. 6). In addition, when forming the connecting portion of the box that divides the underground space, after the loop is self-supporting and the installation position is determined by the height adjustment jack or the like, as in the case of the first rubber rubber joint, etc. It is only necessary to cast concrete after performing the formwork such as the rebar assembly, the inner formwork 27, the outer formwork 28 (see FIG. 8).

The flexible rubber joint, its mounting structure, and its construction method according to the present invention are not limited to those in the above-described embodiment, and the objects, functions and effects of the present invention are not impaired. If so, various design changes can be made.

[Brief description of drawings]

FIG. 1A is a perspective view showing an embodiment of a first flexible rubber joint according to the present invention, and FIG. 1B is a sectional view thereof.

2 is a cross-sectional view showing an example of a connection structure using the flexible rubber joint 10 shown in FIG.

3 (a) is a front view showing the mounting structure of the flexible rubber joint 10 shown in FIG. 1, and FIG. 3 (b) is a side view thereof.

4 (a) is a sectional view taken along the line AA of FIG. 3, and FIG. 4 (b) is
It is a B arrow view of (a).

5 is a cross-sectional view taken along the line DD of FIG.

6 is a sectional view taken along line EE of FIG.

FIG. 7 (a) is a sectional view showing an embodiment of a second flexible rubber joint according to the present invention, and FIG. 7 (b) is a sectional view thereof.

8 is a sectional view showing an example of a connecting structure using the flexible rubber joint 30 shown in FIG. 7, and FIG. 8 (b) is a sectional view showing a state when concrete is poured.

FIG. 9 is a view showing a conventional underground structure connection structure, in which (a) is a schematic view showing a state where the flexible rubber joint 60 is installed in the open channel 71, and (b) is its FF line. FIG.

FIG. 10 is a cross-sectional view of a pair of flanges with a curved portion sandwiched therebetween.
It is sectional drawing which shows an example of the connection structure using the waterproof rubber member 63 fixed in the shape of a letter.

[Explanation of symbols]

10 flexible rubber joint, 11 curved part, 11a top part, 11b hem part, 12 bottom plate part, 13 side wall part,
13a tip, 14 water expansion rubber, 20 loops,
21 pressing plate, 22 connecting plate, 24 spacing member, 25a reinforcing member (beam), 25b reinforcing member (girder),
30 flexible rubber joint, 31 curved portion, 31a top portion, 31b hem portion, 32 bottom plate portion, 33 rubber joint body, 41 holding plate, 42 holding plate body portion,
43 form part, x longitudinal direction, y protruding direction,
The angle formed by θ.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) E21D 11/04 13/00 F16L 1/038

Claims (15)

[Claims] 1. A flexible rubber joint arranged along a connecting portion of a box that defines an underground space, the flexible rubber joint extending in a longitudinal direction of the flexible rubber joint, and the bending portion. A pair of substantially plate-shaped bottom plate portions that extend outward from the hem portions on both sides of the bottom plate portion and extend in the longitudinal direction, and a pair of bottom plate portions that extend in the protruding direction of the curved portion and extend in the longitudinal direction from A flexible rubber joint comprising a pair of plate-shaped side walls integrally formed. 2. The flexible rubber joint according to claim 1, wherein the curved portion has a substantially U-shaped cross section. 3. In a cross section orthogonal to the longitudinal direction of the flexible rubber joint, the apex portion of the curved portion is closer to the hem portion side of the curved portion than the position where the tip ends of the pair of side wall portions are connected. The flexible rubber joint according to claim 1. 4. The flexible rubber joint according to claim 1, wherein an angle formed by the surfaces sandwiching the curved portion between the pair of bottom plate portions is 120 ° or more and less than 180 °. 5. The flexible rubber joint according to claim 1, wherein water-expanded rubber or unvulcanized rubber is arranged on the surface of the bottom plate portion on the side that comes into contact with the cast concrete. 6. A flexible rubber joint arranged along a connecting portion of a box body that defines an underground space, wherein the flexible rubber joint extends in a longitudinal direction of the flexible rubber joint, and the bending portion. A pair of substantially plate-shaped bottom plate portions that extend outward from the hem portions on both sides of and are continuous in the longitudinal direction,
A rubber joint body integrally formed with a pressing plate that also serves as a form and is arranged on the bottom plate portion of the rubber joint body, wherein the pressing plate is on the curved portion side surface of the bottom plate portion. A flexible rubber joint, comprising: a holding plate main body part to be arranged, and a mold part connected to the holding plate main body part at the tip end side of the bottom plate part and extending in the protruding direction of the bending part. 7. The flexible rubber joint according to claim 6, wherein the curved portion has a substantially U-shaped cross section. 8. In a cross section orthogonal to the longitudinal direction of the flexible rubber joint, the apex portion of the curved portion is closer to the hem portion side of the curved portion than the position where the top end portions of the pair of mold parts are connected. The flexible rubber joint according to claim 6 or 7. 9. The flexible rubber joint according to claim 6, wherein an angle formed by the surfaces sandwiching the curved portion between the pair of bottom plate portions is 120 ° or more and less than 180 °. 10. The flexible rubber joint according to claim 6, wherein water-expandable rubber or unvulcanized rubber is arranged on the surface of the bottom plate portion on the side that comes into contact with the cast concrete. 11. A flexible rubber joint according to any one of claims 1 to 5 is used alone or in combination of two or more, and the ends in the longitudinal direction are looped so that the apex of the curved portion is on the inside. In a mounting structure of a flexible rubber joint that is connected in a shape, a pressing plate is attached at a predetermined interval along the circumferential direction on the surface of the bottom plate portion that forms the inner peripheral surface of the loop, The loop has a connection plate for fixing the pressing plates adjacent to each other in the circumferential direction, a gap between the bottom plate portions facing each other across the curved portion, and a gap holding for fixing the angle formed by the pair of bottom plate portions. A flexible rubber joint mounting structure, characterized in that a self-standing rigidity is imparted by a material and a reinforcing material for retaining the shape of the entire loop. 12. A flexible rubber joint according to any one of claims 6 to 10, which is used alone or in combination of two or more, so that its longitudinal ends are looped so that the top of the curved portion is on the inside. In the attachment structure of a flexible rubber joint, the loops are connected relative to each other with the curved portion sandwiched between a connecting plate for fixing the pressing plates also serving as formwork adjacent to each other in the circumferential direction. The space holding member for fixing the distance between the bottom plate portions to be formed and the angle formed by the pair of bottom plate portions, and the reinforcing member for holding the shape of the loop as a whole are provided with self-sustaining rigidity. Characteristic flexible rubber joint mounting structure. 13. A pressing plate is attached to the bottom plate portion of the flexible rubber joint according to claim 1, and a connecting plate is further attached between pressing plates adjacent to each other in the longitudinal direction of the flexible rubber joint. While connecting and fixing the pressing plates,
After forming a loop by connecting the flexible rubber joint so that the top side of the curved portion is on the inside, attach the spacing member to the pressing plate or the connecting plate,
Fixing the interval between the bottom plate portions facing each other across the curved portion and the angle formed by the pair of bottom plate portions, and then (a) attaching a reinforcing material to the loop to maintain the shape of the loop, and (b) The step of standing the loop in the open channel and the steps are performed in this order or in the reverse order. Furthermore, concrete is cast by using the bottom plate and side wall of the flexible rubber joint as a weir plate, and A method for constructing a flexible rubber joint, characterized in that the connecting plate, the spacing member and the reinforcing material are removed after the resin has hardened. 14. A flexible rubber joint according to any one of claims 6 to 10, wherein a retaining plate also serving as a weir plate is arranged on the bottom plate portion, and the flexible rubber joint is further provided between pressing plates adjacent to each other in the longitudinal direction. After connecting and fixing the connecting plates to each other to form a loop by connecting the pressing plates so that the top side of the curved portion of the flexible rubber joint is on the inside, a gap is formed between the pressing plate and the connecting plate. Attach the holding material,
Fixing the interval between the bottom plate portions facing each other across the curved portion and the angle formed by the pair of bottom plate portions, and then (i) attaching a reinforcing material to the loop to maintain the shape of the loop, and (ii) The steps of erection of the loop in the open channel and this order are carried out in this order or in the reverse order.Furthermore, concrete is cast using the bottom plate part of the flexible rubber joint and the form part of the pressing plate as a weir plate. Then, after the concrete is hardened, the connecting plate, the spacing member, and the reinforcing member are removed, and a method for constructing a flexible rubber joint. 15. The method for constructing a flexible rubber joint according to claim 13, wherein after removing the connecting plate, the spacing member and the reinforcing member, the bottom plate portion is pressed again against the cast concrete.