KR100956448B1 - Rubber gasket for connecting elements of an immersed tube tunnel - Google Patents

Abstract

According to the present invention, a rubber gasket having a U-shaped groove is inserted into a connection part of the submerge by applying rotation moments in different directions with respect to the connection part of the submerge. A rubber gasket for connection of an acupuncture tunnel, in which both wings of the abutment adhere to the acupuncture container to prevent leakage, wherein a rubber gasket having a U-shaped groove is inserted so that the upper part of the U part faces outward so as to surround the hollow part of the acupuncture box at the connection part of the acupuncture box. The rotary moment is applied to the connection part so that both wings of the rubber gasket are in close contact with the end of the seam by the water pressure even when the connection part is opened, so that the wing of the rubber gasket is submerged by the water pressure even if the connection part of the seam is opened. Close contact with the end prevents leakage of rubber gasket There can stop.

Immersion tunnel, connection structure, rubber gasket, waterproof

Description

Rubber gasket for connecting immersion tunnel {Rubber gasket for connecting elements of an immersed tube tunnel}

The present invention relates to a rubber gasket for connection of a immersion tunnel, and in particular, a rubber gasket having a U-shaped groove is inserted into a connection part of the immersion box to receive rotation moments in different directions around the connection part of the immersion box to open the connection part. It relates to a rubber gasket for connection of the immersion tunnel, which is prevented from leaking by the two wings of the rubber gasket close to the immersion by water pressure.

In the immersion tunnel method, trenches are excavated under a river or sea as shown in FIG. 1, and a submarine tunnel is created at a workshop and transported to a place where the subsea tunnel 100 is to be installed. After installing the submerged box 110 in the trench formed in advance, the buried method is completed to complete the tunnel.

The immersion tunnel method is divided into circular and rectangular concrete methods according to the shape and material of the immersion box. The former is mainly developed in the United States, and directly buried the immersion box 110 on the sand-based foundation, and the rubber gasket 111 is inserted into the connection between the immersion box 110 and the immersion box 110. Joining underwater, etc. The latter is a widely used method in Europe, where both ends of the seam are laid on the crossbars, and the gap is filled with sand.

A representative embodiment of a connection portion of a conventional submarine that can withstand an earthquake is disclosed in Japanese Patent Laid-Open No. 9-14420, which shows a main sectional side view thereof.

As shown in FIG. 2, the connection part of the immersion box is towed by the PC cables 3 and 3 via the rubber gasket 2 between the immersion boxes 1 and 1. Each PC cable 3 or 3 is connected to one end thereof with a coupler 4.

The other end of each of the PC cables 3 and 3 passes through the steel pipe 7 and the metal fixing plate 8 which are integral with the submersion boxes 1 and 1 by the spiral reinforcing bars 5, and by the nut 9 Tighten the screws to fix the PC cables (3, 3) by applying tension.

3 (a) and 3 (b) are explanatory views showing a state in which rotation moments different from each other are applied to connection portions of the conventional immersion box so that the connection portions of the immersion box and the immersion box are opened.

As shown, when rotation moments in opposite directions are applied to the connecting portions of the submersible boxes 1 and 1, respectively, the submersible boxes 1 and 1 rotate in opposite directions, and thus the submerged box ( As the gap between 1 and 1 opens, the compressive force acting on the rubber gasket 2 sandwiched between the submerged boxes 1 and 1 is weakened.

Therefore, the rubber gasket 2 is restored in a compressed state to recover a rounded cross section, and the round end surface of the rubber gasket 2 and the end faces of the submerged boxes 1 and 1 are inferior in adhesion, thereby increasing the possibility of leakage.

As described above, the connection structure of the conventional immersion box has a problem in that leakage may occur due to a drop in adhesion between the rubber gasket and the end of the immersion box due to the rotational moment applied to the connection part of the immersion box.

The present invention has been made to solve the above problems, an object of the present invention is to provide a rubber gasket by the hydraulic pressure applied to the rubber gasket even if the connection part is opened by rotation moments of different directions applied to the connection part of the submerged box It is to provide a rubber gasket for connection of the immersion tunnel that can be in close contact with the end of the immersion box to prevent leakage.

Another object of the present invention is to insert a gasket having a U-shaped groove at the connection part of the immersion box, so that even if a rotation moment is applied to the connection part, the immersion tunnel to prevent the leak by making the wing of the rubber gasket close to the end of the immersion by water pressure To provide a rubber gasket for connection.

Still another object of the present invention is to provide a rubber gasket for connection of a submerged tunnel that prevents leakage due to a weakening of adhesion between the rubber gasket and the ends of the submerged box even when a rotation moment is applied to the connection part of the submerge. .

In order to achieve the above object, the rubber gasket for connection of the submerged tunnel according to the present invention is to insert a rubber gasket having a U-shaped groove with the upper surface of the U-shaped outward so as to surround the hollow part of the submerged box at the connection part of the submerged box. By the rotation moment is applied to the connecting portion by the connection portion is characterized in that the wing of the rubber gasket is configured to be in close contact with the end of the seam by the hydraulic pressure.

The height h of the groove of the rubber gasket according to the present invention is larger than the half of the width b of the rubber gasket by an inverse multiple of the coefficient of friction β between the rubber gasket and the immersion box.

A U-shaped steel plate is inserted in the rubber gasket according to the present invention to reinforce the elastic force of the rubber gasket.

The U-shaped steel plate according to the present invention is characterized in that the gap δ is less than or equal to the width b of the rubber gasket, and the height ℓ is larger than the height h of the U-shaped groove formed in the rubber gasket.

A convex portion is formed on the bottom of the U-shaped groove according to the present invention.

The bottom surface of the rubber gasket according to the present invention is characterized in that the middle is concave to form an arch.

In the rubber gasket according to the present invention, an arched steel plate having the same degree of curvature as the arch is inserted.

The bottom surface of the rubber gasket according to the present invention is characterized in that the lower convex portion is formed in the middle so as to protrude downward.

An arcuate steel plate having the same degree of curvature as the lower convex portion is inserted into the rubber gasket according to the present invention.

The support step of supporting the bottom of the rubber gasket according to the invention is characterized in that it is formed by extending from the lower end of the immersion box.

As described above, according to the present invention, even when the rotation moment is applied to the connection part of the immersion box, even if the connection part is opened, the pressure of the rubber gasket is closely adhered to the end of the immersion by the hydraulic pressure applied to the rubber gasket. It does not weaken and can prevent leakage.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

Fig. 4 shows a front view of the rubber gasket having a U-shaped cross section as viewed from the end of one submerged box according to the present invention.

The connection part between the submersible boxes 10 and 10 used in the present invention includes a rubber gasket to surround the two hollow parts 30 and 30 constituting the interior of one submerged box 10 as shown in FIG. 4. 20) is attached to the end of the submerged box (11) and the other submerged box (10) against each other, so that the rubber gasket 20 is sandwiched between the two submerged boxes (10, 10) and connected by a PC cable.

5 (a) and 5 (b), according to the present invention, a rubber gasket having a U-shaped groove in the cross section is inserted into the connection part of the immersion box and fixed with a PC cable and an external rotation moment is applied to the rubber gasket. A cross-sectional view of the connection portion of the immersion box is shown showing this unapplied state.

When the rubber gasket 20 having a U-shaped groove fitted to surround the hollow portion 12 of the immersion box at the connection portion of the immersion box 10, 10 is pulled by a connecting device such as a PC cable and applied with tension, Fig. 5 (a) As shown in FIG. 2, the rubber gasket 20 receives compressive force from the end portions 11 and 11 of both seam bins, and the width thereof decreases to b 'and the height of the grooves increases to h'.

Therefore, the rubber gasket 20 is compressed by receiving a compressive force, and an adhesion force proportional to the compressive displacement and the elastic force of the rubber is generated between the submerged vessels 10 and 10. If the adhesion is greater than the water pressure, it is possible to overcome the water pressure and prevent water from leaking.

As shown in FIG. 5 (b), when rotation moments having different directions are generated at the connection portions of the settlement boxes 10 and 10, the compressive force applied to the rubber gasket 20 is “0” (compression force = 0). This can be

 Also, when the rotation moment is greater than the compressive force, negative compressive force (compression force <0) may occur as shown in FIG. When a negative compressive force is applied to the rubber gasket 20 according to the present invention, both wings 21 and 21 of the U-shaped groove are opened by the hydraulic pressure applied to the U-shaped groove.

Thus, the lower portion of the rubber gasket 20 according to the present invention is spaced apart by the distance d from the ends 11 and 11 of the recess 10, 10, but both wings 21 and 21 of the U-shaped groove are The pressure is further increased by the interval d to be in close contact with the ends 11 and 11 of the submarines 10 and 10.

Therefore, when rotation moments different from each other are applied to the connection part of the submerged ship more than the compressive force due to an earthquake or tsunami, the connection part of the submerged box 10 and 10 is wider than the width b of the rubber gasket 20 so as to be negative. Even when a compressive force is generated, the two wings 21 and 21 of the U-shaped groove are opened by hydraulic pressure, and thus are in close contact with the ends 11 and 11 of the submerged boxes 10 and 10.

When negative compressive force is generated, the adhesion force F _H on the side of the rubber gasket 20 is calculated as follows. To simplify the equation, consider a right triangle OAB in which the height h of the U-shaped groove of the rubber gasket 20 is as shown in FIG.

The horizontal component P _H and the vertical component P _V of the hydraulic pressure P applied to the hypotenuse OA of the right triangle OAB are

,

이다.

,

to be.

Therefore, the adhesion force F _H on the side surface of the rubber gasket 20 The leakage forces F _V pushing down and down are

The condition that the rubber gasket 20 is not pushed down by the hydraulic pressure P applied to the rubber gasket 20 is a frictional force βF _H ≥ F _V is the coefficient of friction between the rubber gasket and the immersion box. So if you substitute the above value,

 β · (P · h) ≥P · (b / 2) → h ≧ b / (2β), and the friction coefficient β is 0 <β <1.

Therefore, when a negative pressure is generated in the rubber gasket 20 having the U-shaped groove according to the present invention when the rotation moment is applied to the connection portion of the submerge box 10, 10, the rubber gasket 20 is subjected to hydraulic pressure. It can be seen that the height h of the groove of the rubber gasket 20 must be greater than the half of the width b of the rubber gasket 20 by an inverse multiple of the friction coefficient in order to prevent leakage caused by the push.

8 shows an embodiment in which a U-shaped steel plate is inserted along a U-shaped groove in a rubber gasket having a U-shaped groove according to the present invention.

The U-shaped steel plate 30 according to the present embodiment is inserted into the rubber gasket 20 to reinforce the elastic force of the rubber gasket 20, and when inserted between the submerged boxes 10 and 10, the rubber gasket In addition to the elastic force of 20, the elastic force of the steel plate 30 is applied to double the adhesion force, which is more efficient in preventing leakage.

9 shows a perspective view of a portion of a U-shaped steel plate inserted into the rubber gasket according to the present invention.

The gap δ of the U-shaped steel plate 30 is smaller than or substantially equal to the width b of the rubber gasket 20, and the height ℓ is greater than the height h of the U-shaped groove formed in the rubber gasket 20, thereby forming a U-shaped steel plate. When the 30 is inserted into the rubber gasket 20, the rubber gasket 20 may be inserted while surrounding the U-shaped groove.

Fig. 10 (a) shows an embodiment in which a convex portion is formed at the bottom of the U-shaped groove of the rubber gasket having the U-shaped groove according to the present invention, and in Fig. 10 (b) of the U-shaped groove of the rubber gasket according to the present invention. An embodiment is shown in which a convex portion is formed at the bottom and applied to the connection portion of the immersion box to prevent shear failure due to vertical hydraulic pressure.

As the water depth deepens, the water pressure increases by about 1 atmosphere per 10m. When the water depth is 100 m or more, the water pressure applied to the rubber gasket 40 according to the present invention is applied with a water pressure corresponding to 11 atmospheres per cm 2.

This large hydraulic pressure is applied to the middle portion of the rubber gasket 40 as a shear force sufficient to tear the middle portion of the rubber gasket 40, so that it is shown at the bottom of the middle portion of the rubber gasket 40 to counter this shear force. As described above, the convex portion 41 is formed.

The convex portion 41 according to the present embodiment is formed such that its width is 1/3 of the width b of the rubber gasket 40 and is symmetrical to the middle portion of the rubber gasket 20. In addition, when the U-shaped groove formed in the rubber gasket 20 is the parabolic equation y = ax ² , the height of the convex portion 22 is twice the y value of the x value position away from the origin O x = b / 6. y '= is formed so that the height ^{(a · b 2) / 18} .

As shown in FIG. 10 (b), when the rubber gasket 40 having the convex portion 41 is formed at the bottom of the intermediate portion, the rubber gasket 40 is installed at the connection portion of the submarines 10 and 10, even if excessive vertical hydraulic pressure F _V is applied. the convex portion 41 formed in the middle portion of the gasket (40) against the shearing force generated by the vertical pressure F _V because it prevents the intermediate portion of the rubber gasket 40 is broken.

Fig. 11 (a) shows an embodiment in which a convex portion is formed at the bottom of the U-shaped groove of the rubber gasket according to the present invention, the bottom is formed in an arc shape, and an arcuate steel plate is inserted therein. An example in which a rubber gasket according to an example is applied to the connection portion of the immersion box to prevent shear failure due to vertical hydraulic pressure is shown.

The convex portion 51 according to the present embodiment is the same as the previous embodiment, and the bottom surface of the rubber gasket 50 according to the present embodiment forms an arch by allowing the middle to be concave. The height of the arch is formed so that d = ab ^2/36. However, the height of the arch is not limited to the above embodiment and can be changed according to the magnitude of the hydraulic pressure.

In addition, when the convex portion 51 and the arch structure cannot tolerate the shear force due to the vertical hydraulic pressure F _V , the arched steel plate 52 having the same degree of curvature as the arch is inserted into the rubber gasket 50. It is to be able to counter shear force by hydraulic pressure F _V.

Fig. 12 (a) shows an embodiment in which a convex portion is provided at the bottom of the rubber gasket and the bottom of the U-shaped groove according to the present invention, and an arcuate steel plate is inserted therein, and Fig. 12 (b) shows the rubber according to this embodiment. An embodiment is shown in which a gasket is applied to the connection portion of the immersion box to prevent shear failure due to vertical hydraulic pressure.

The upper convex portion 61 formed in the groove according to the present embodiment is the same as in the previous embodiment, and the lower convex portion 62 is disposed in the middle so that the bottom surface of the rubber gasket 60 according to the present embodiment is convex downward. To form. The height of the lower convex portion 62 is formed in the same manner as the height d = ab ^2/36 of the upper convex portion 52.

In addition, when the upper convex portion 61 and the lower convex portion 62 cannot withstand the shear force due to the vertical hydraulic pressure F _V , an arc-shaped steel plate having the same degree of curvature as the convex portion in the rubber gasket 60 ( Insert 63) to counter the shear force due to vertical hydraulic pressure F _V.

13 shows an embodiment in which a step supporting the bottom of the rubber gasket according to the present invention is formed at the end of the immersion box to prevent shear failure due to vertical water pressure.

The support step 70 according to the present embodiment extends by the length L at the lower end of the right subsidence box 10 ′ to support the bottom surface of the rubber gasket 80. The length l of the support step 70 extends to be smaller by the compression length t which is reduced by the compression force than the width b of the rubber gasket 80.

1 is a schematic view of the immersion tunnel constructed under a river or the sea,

Figure 2 is a representative embodiment of the connection portion of the conventional submarine that can withstand earthquakes,

3 (a) and 3 (b) are explanatory diagrams showing a state in which rotation moments different from each other are applied to connection portions of a conventional immersion box so that connection portions of the immersion box and the immersion box are opened;

Fig. 4 is a front view of the rubber gasket having a U-shaped cross section viewed from the end of one submerged box according to the present invention.

5 (a) and 5 (b) show a state in which a rubber gasket having a U-shaped groove having a U-shaped groove is inserted into a connection part of the immersion box and fixed with a PC cable, and an external rotation moment is applied to the rubber gasket according to the present invention. Cross-sectional view of the connection part of the immersion box showing the state in which it is not applied,

5 is an embodiment in which the trainer wearing a glove operating the transmitter according to the present invention,

6 is an embodiment in which a negative compression force is generated by applying a rotation moment greater than a compression force to the connection portion of the immersion tunnel according to the present invention;

7 is an embodiment in which the groove of the rubber gasket is straightened to obtain the adhesion force on the side surface of the rubber gasket fitted to the connection part of the immersion tunnel according to the present invention.

8 is an embodiment in which a U-shaped steel plate is inserted along a U-shaped groove in a rubber gasket having a U-shaped groove according to the present invention;

FIG. 9 is a perspective view of a portion of a U-shaped steel plate inserted into the rubber gasket according to the present invention. FIG.

10 (a) is an embodiment in which a convex portion is formed at the bottom of a U-shaped groove of a rubber gasket having a U-shaped groove according to the present invention;

Figure 10 (b) is an embodiment in which a convex portion is formed at the bottom of the U-shaped groove of the rubber gasket according to the present invention and applied to the connection portion of the immersion box to prevent shear failure due to vertical hydraulic pressure.

Figure 11 (a) is an embodiment in which a convex part is installed at the bottom of the U-shaped groove of the rubber gasket according to the present invention, the bottom is formed in an arch shape, and an arcuate steel plate is inserted therein,

Figure 11 (b) is an embodiment in which the rubber gasket according to the present embodiment is applied to the connection portion of the immersion box to prevent shear failure due to vertical hydraulic pressure,

12 (a) is an embodiment in which a convex part is installed at the bottom of a rubber gasket and a bottom of a U-shaped groove according to the present invention, and an arcuate steel plate is inserted therein;

12 (b) is an embodiment in which the rubber gasket according to the present embodiment is applied to the connection portion of the immersion box to prevent shear failure due to vertical water pressure.

13 is an embodiment in which a step supporting the bottom of the rubber gasket according to the present invention is formed at the end of the immersion box to prevent shear failure due to vertical water pressure.

<Description of Symbols for Main Parts of Drawings>

10: ambush 11: end of ambush

20: rubber gasket with U-shaped groove 21: wing of U-shaped groove

30: U-shaped steel plate 40, 50, 60, 80: rubber gasket

41, 51: convex portions 52, 63: steel plate

61: upper convex part 62: lower convex part

Claims (10)

A rubber gasket 20 having a U-shaped groove is inserted so that the U-shaped groove faces outward, and surrounds the hollow portion 12 of the immersion box at the connection portion of the immersion box 10, 10. The height h of the groove of the rubber gasket 20 is the rubber for connection of the submerged tunnel, characterized in that it is larger than the half of the width b of the rubber gasket 20 by the inverse of the coefficient of friction β between the rubber gasket 20 and the submerged box 10. gasket. delete The rubber gasket of claim 1, wherein a U-shaped steel plate (30) is inserted into the rubber gasket (20) to reinforce the elastic force of the rubber gasket. The gap δ of the U-shaped steel plate 30 is less than or equal to the width b of the rubber gasket 20, and the height ℓ is the height h of the U-shaped groove formed in the rubber gasket 20. Rubber gasket for connection of the immersion tunnel, characterized in that larger. The rubber gasket for connecting a submerged tunnel according to claim 1, wherein a convex portion (41) is formed at the bottom of the U-shaped groove. 6. The rubber gasket for connecting a submerged tunnel according to claim 5, wherein the bottom surface of the rubber gasket is formed in an arch shape with a middle concave. The rubber gasket for connecting a submerged tunnel according to claim 6, wherein an arcuate steel plate (52) having the same degree of curvature as the arch is inserted into the rubber gasket. The rubber gasket for connecting a submerged tunnel according to claim 5, wherein a lower convex part (62) is formed in the middle so that the bottom of the rubber gasket is convex downward. The rubber gasket for connecting a submerged tunnel according to claim 8, wherein an arcuate steel plate (63) having the same degree of curvature as the lower convex portion (62) is inserted into the rubber gasket. 9. The rubber gasket for connecting a soaking tunnel according to claim 8, wherein a support step (70) for supporting the bottom of the rubber gasket is formed by extending from a lower end of the soaking box.

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