JP2015168350A - Connection structure of water bottom structure and cylindrical body, connection method of water bottom structure and cylindrical body, and method of saving personnel from water bottom structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of a water bottom structure and a cylindrical body, a connection method of the water bottom structure and the cylindrical body, and a method of saving personnel from the water bottom structure, capable of quickly saving the personnel in the water bottom structure during normal time and an emergency, without applying a diver or a submarine.SOLUTION: A cylindrical body 2 suspended by a floating crane is disposed via a gasket 4 on a position surrounding a hatch 1c on a top end surface 1a of a water bottom structure (submerged caisson) 1. The cylindrical body 2 is connected so that the cylindrical body 2 can be relatively displaced to the top end surface 1a by water pressure acting to the cylindrical body 2 from outside, thereby a connection structure 10 of the water bottom structure and the cylindrical body is formed.

Description

  The present invention relates to a connection structure between a water bottom structure and a cylinder, a connection method between the water bottom structure and a cylinder, and a method for rescue personnel from within the water bottom structure.

  When an emergency situation occurs in a person in a submarine structure such as a submerged tunnel that is submerged in the seabed, or when a person who is left behind in a submarine structure is rescued, a diver has conventionally been in the submarine structure. A method has been adopted in which a diver enters the box through an emergency access chamber provided in advance in the water bottom structure and rescues personnel. Moreover, in offshore construction such as installing a submarine structure on the seabed, a method of always deploying a submarine on the land side in preparation for an emergency is also adopted.

  However, in the former method, it is necessary to provide an emergency access chamber separately for the underwater structure, which leads to an increase in the manufacturing cost of the underwater structure, and the weather and sea conditions are rough and diving work cannot be performed. There is a problem that it may not be possible to respond to an urgent request under circumstances.

  On the other hand, in the latter method, it is not practical to always have submarines deployed. For example, in the midst of offshore construction where the period is limited, there is a possibility that constant deployment of submarines may be acceptable although it is not realistic, but there is room for continuous deployment of submarines after the use of a submarine structure. There is no.

  Here, in Patent Document 1, it is possible to walk while grasping where the diver is walking in the water, and it is not necessary to install a device on the bottom of the water, and the size of each device is reduced. And an underwater position detection system, a sound source device, an underwater position detection device, and an underwater position detection method that can reduce the time spent for each device to transmit and receive signals. More specifically, the sound source device obtains positioning information from an external positioning means, means for calculating its own position, and a sound source that superimposes its own position and irradiates the sound as a sound wave of a predetermined intensity. The underwater position detection device includes a means for acquiring the irradiated sound wave, a process for obtaining the position of the sound source device superimposed on the acquired sound wave, and a process for obtaining the distance to the sound source device based on the intensity of the sound wave. Means for acquiring the positions of the plurality of sound source devices and the distances to the plurality of sound source devices, and performing a predetermined positioning process based on the acquired positions of the plurality of sound source devices and the distances to the plurality of sound source devices. And means for acquiring its own position.

  According to the technique described in Patent Document 1, although the position of the diver can be specified, the above-described problem relating to the rescue of personnel in the water bottom structure cannot be solved at all.

  In addition, there is no conventional disclosed technique that discloses a technique other than applying a diver or a submarine for rescue of personnel in a submarine structure.

JP 2006-275920 A

  The present invention has been made in view of the above-mentioned problems, and can quickly rescue personnel in a submarine structure, whether it is a normal time or an emergency, without applying a diver or a submarine. It is an object of the present invention to provide a water bottom structure-cylinder connection structure, a water bottom structure-cylinder connection method, and a method for rescue personnel from within the water bottom structure.

  In order to achieve the above-mentioned object, the bottom structure-cylinder connection structure according to the present invention includes a cylinder suspended by a crane ship at a position surrounding the hatch on the top end surface of the bottom structure through a gasket. The cylinder is connected to the top end face so as to be relatively displaceable by water pressure acting on the cylinder from outside.

  The connecting structure of the bottom structure and the cylinder according to the present invention is such that the cylinder in a state suspended by a crane ship is positioned on the top end surface of the bottom structure, and the cylinder is subjected to water pressure acting on the cylinder from the outside. Is connected to the top end face so as to be relatively displaceable.

  Here, the “underwater structure” means a submerged tunnel constructed by connecting caverns submerged in the bottom of the water, or a shield tunnel with a portion of the bottom facing the seawater from the bottom of the water. It refers to various structures that are installed or partially buried in the bottom of the water. In addition, “water bottom” means a seabed, a lake bottom, a large riverbed, and the like.

  A hatch having a lid that can be opened and closed or detached is attached to the top end surface of the submarine structure. The hatch has an opening that allows at least one person to pass through. In other words, in the case of a hatch intended only for personnel rescue, a hatch that is large enough to allow personnel to pass through or that can accommodate a gondola that accommodates personnel may be applied. A hatch that is large enough to allow the largest unloaded materials to pass through when it is necessary to carry in / out materials and equipment from within the structure, or to carry in / out relatively large vehicles and equipment via hatches. Should be applied. In addition, the actual personnel rescue is to drop the gondola that is suspended from the crane ship and the rescuer gets in the cylinder, the rescuer opens the lid of the cylinder, and the gondola is suspended in the underwater structure, One example is a method in which personnel in a submarine structure are housed in a gondola and lifted by a crane ship.

  The cylinder is in a state of being suspended by a crane ship. This is because, for example, when the cylinder is used as a personnel rescue path, the bottom of the cylinder is underwater structure with the crane ship hanging the cylinder. This is because the connection structure of the present invention is formed by disposing on the top end surface of the object. In other words, the crane ship transports the cylinder to the bottom structure when there is a request to carry in / out personnel or various materials / equipment from inside the bottom structure even during emergency situations such as rescue of personnel. Then, the connecting structure of the present invention is temporarily formed by suspending the cylinder and installing it on the top end surface of the water bottom structure. Note that “emergency” includes various situations. For example, when a shaft with a large opening with its upper part protruding from the sea or the like is attached to the top end surface of a submarine structure, a ship or a hoist ship can collide with this shaft and use the shaft. If it disappears, or part of the submerged tunnel that extends on the seabed is damaged by an earthquake, etc., part of the submerged tunnel that leaves personnel is isolated, and the part of the submerged tunnel passes through the submerged tunnel that leads to the land. Inaccessible.

  Here, as the “cylindrical body”, in addition to a steel circular tube or square tube, a structure in which a truss frame made of steel is assembled in a cylindrical shape and a steel plate is attached to the surface thereof can be applied. In addition, the cylinder may be provided with a discharge port through which water inside the cylinder can be discharged out of the cylinder after being installed on the top end surface of the bottom structure.

  In addition, the bottom end of the cylinder and the top end surface of the bottom structure are not firmly fixed to each other by bolts, welding, or the like, but only to the top end surface of the bottom structure through a gasket interposed therebetween. It is also one of the characteristic configurations of the connection structure of the present invention that the cylinders are connected so as to be relatively displaceable.

  Gaskets are formed by applying a gel-like gasket to the bottom end of the cylinder or the top end surface of the bottom structure and drying it, or bonding a standard rubber gasket to the bottom end of the cylinder or the top end face of the bottom structure. Can be mentioned.

  For example, when using a tubular body made of a steel pipe, an annular rubber gasket is bonded to the lower end of the steel pipe, and the tubular body is attached to the top end surface of the bottom structure so that the rubber gasket contacts the top end surface of the bottom structure. By installing it on the end face, both sealing properties can be guaranteed.

  By arranging the cylinder around the top edge hatch of the bottom structure, hydrostatic pressure acts on the cylinder from the outside, and the cylinder is pressed against the top edge of the bottom structure by this hydrostatic pressure. Can do.

  The cylinder is suspended from its upper end or near its upper end by a crane ship, so that its installation posture can be displaced from an upright state to various inclined postures without changing its installation position with respect to the bottom structure. Connected with underwater structure. In other words, the top end surface and the cylindrical body of the water bottom structure form a pin coupling structure in which the other is pivotally connected to one without moving the horizontal position or the vertical position of both connecting portions. Yes.

  In this way, the cylinder for the bottom structure is applied by applying so-called water pressure bonding, in which water pressure is applied to the cylinder body from the outside without connecting the cylinder body to the top end surface of the bottom structure by bolts, welding, or the like. The body can be installed quickly, which is suitable for emergency rescue of personnel in the underwater structure. In addition, the cylinder suspended by the crane ship can swing back and forth and right and left under the influence of waves, but the lower end of the cylinder is relatively displaceable with respect to the water bottom structure. The problem of damaging the top end surface of the water bottom structure due to the swinging cannot occur. That is, if the bottom end of the cylinder is tightly coupled to the top end surface of the bottom structure with bolts, etc., and the cylinder swings due to the influence of waves, the bottom end of the bottom structure is pulled out via the bolt. When the force or push-in force is applied and the swinging of the cylinder is large and the pulling-out force or the like is excessive, the top end face can be damaged.

  Moreover, after reaching the purpose, the cylinder can be removed easily and quickly by lifting the cylinder with a crane ship. In addition, the cylinder can be permanently installed in, for example, an onshore yard near the bottom structure, and when requested, it can be stacked on a crane ship and transported to the bottom structure to be used for construction of a connection structure.

  Moreover, the preferable embodiment of the connection structure of a water bottom structure and a cylinder according to the present invention is such that the cylinder includes a flexible joint having water-stopping properties at an intermediate position.

  For example, when the cylinder is long, the bottom of the cylinder has a pin coupling structure with the top end surface of the water bottom structure, but the possibility of the cylinder being damaged due to waves cannot be denied.

  Therefore, as an embodiment of a flexible joint having water-stopping properties, the cylinder is cut into two upper and lower edges at an intermediate position (upper cylinder, lower cylinder), and outside the upper cylinder and the lower cylinder. A relatively large-diameter sheath tube is arranged (upper sheath tube, lower sheath tube), and the upper and lower sheath tubes are connected with, for example, a corrugated rubber gasket, so that water blocking is provided at an intermediate position of the cylindrical body. A flexible joint can be formed.

  In a preferred embodiment of the water bottom structure-cylinder connection structure according to the present invention, a guide member is provided around the top end face hatch, and the cylinder is disposed inside the guide member. It is what.

  This guide member is a suitable member for positioning while suspending a cylinder suspended by a crane ship around a hatch on the top end surface of the water bottom structure.

  Examples of the guide member include a form formed of a steel pipe having a diameter larger than that of the cylindrical body, attached to a position around the hatch, and a steel frame is formed around the hatch by assembling steel materials. .

  Since the guide member is provided on the top end surface of the bottom structure, the working efficiency when the cylinder is suspended and positioned on the top end surface of the bottom structure is significantly increased.

  The present invention also extends to a method for connecting a bottom structure and a cylinder, which is a cylinder suspended by a crane ship at a position surrounding a hatch on the top end surface of the bottom structure. A first step of connecting the cylinder to the top end face so as to be relatively displaceable by the water pressure, and applying water pressure to the cylinder body from the outside. This is a second step in which the cylinder is hollowed out.

  According to the connection method of the present invention, a cylinder is disposed on the top end surface of the bottom structure, and a so-called water pressure joint is applied to apply water pressure to the cylinder from the outside. The body can be installed quickly.

  In the connection method of the present invention, in the first step, a guide member is attached around the top end hatch, and the cylinder suspended by the crane ship is guided by the guide member while the hatch is It is preferable to position it around.

  By suspending and positioning the cylinder on the top end surface of the bottom structure while using the guide member, the speed of installation of the cylinder with respect to the bottom structure can be further improved.

  Furthermore, the present invention extends to a method for rescue personnel from within a submarine structure. This method includes a crane ship loaded with the cylinder in response to a personnel rescue request inside the submarine structure. Access, apply the connection method, connect the bottom structure and the cylinder through the first step and the second step, open the lid of the hatch, and connect the cylinder to the inside of the bottom structure. It rescues personnel inside the submarine structure as a personnel rescue route that connects the outside.

  According to the personnel rescue method of the present invention, the cylinder can be quickly installed on the top end surface of the bottom structure, and a personnel rescue path can be formed at an early stage from the request. Therefore, emergency rescue of personnel in the bottom structure is high. Can be realized under success rate.

  As can be understood from the above description, according to the submarine structure-cylinder connection structure, the submarine structure-cylinder connection method, and the method of rescue personnel from within the submarine structure according to the present invention, a crane ship The cylinder suspended from the bottom is disposed on the top end surface of the bottom structure, and water pressure is applied to the cylinder from outside to connect the top end surface of the bottom structure and the cylinder. It is possible to rescue the personnel in the submarine structure quickly and at a high success rate without using a submarine or submarine, and quickly, even during an emergency.

It is the schematic diagram explaining the connection structure body of the water bottom structure of this invention, and a cylinder. It is the longitudinal cross-sectional view explaining the connection part of a water bottom structure and a cylinder. It is the III-III arrow line view of FIG. It is a longitudinal section explaining a flexible joint. It is the schematic diagram explaining the displacement aspect of the cylinder at the time of receiving the influence of a wave.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a water bottom structure-cylinder connection structure, a water bottom structure-cylinder connection method, and a method for rescue personnel from within the water bottom structure will be described below with reference to the drawings. In addition, although the illustrated water bottom structure shows a submerged box submerged in the water bottom and a submerged tunnel formed by connecting the submerged boxes, the connection of the submarine structure and the connection method constituting the connection structure of the present invention is shown. Of course, the target bottom structure is not limited to these sinking boxes and tunnels.

(Embodiment of connection structure of bottom structure and cylinder, connection method of bottom structure and cylinder, and method of rescue personnel from within bottom structure)
FIG. 1 is a schematic view illustrating a connection structure between a water bottom structure and a cylinder according to the present invention, FIG. 2 is a longitudinal sectional view illustrating a connection portion between the water bottom structure and a cylinder, and FIG. It is a III-III arrow directional view.

  The connecting structure 10 shown in the figure is set on one submerged box 1 among a plurality of submerged boxes 1 (water bottom structures) that are set on the seabed BS and connected to each other, and the top end face 1 a of the submerged box 1. The cylinder 2 is generally constituted by the arranged cylinder 2 and the crane ship 3 that suspends the cylinder 2 via wires W. In the illustrated example, the cylindrical body 2 is disposed in one sinking box 1. However, when the extension of the sinking tunnel 20 is long, the sinking box 1 in which the cylindrical body 2 is disposed is provided. A plurality of groups are preferably provided.

  A plurality of submerged boxes 1 are connected to each other to form a submerged tunnel 20, and this submerged tunnel 20 leads to two land routes (not shown) to form submarine roadways, railroads, infrastructure pipes, and the like. .

  As shown in FIG. 2, the top end surface 1a of the sinking box 1 in which the cylindrical body 2 is disposed is equipped with a hatch 1c having a lid 1c 'that can be freely opened and closed (opening direction X). At a position surrounding the hatch 1c in 1a, a guide member 5 is provided which is formed by assembling a steel material in an annular shape and has a downward slope on the hatch side. In addition, the planar alignment of the guide member 5 may be a rectangular frame shape (square frame shape, rectangular frame shape) or the like other than the ring shape shown in FIG.

  As shown in FIGS. 2 and 3, an annular gasket base 1 d made of steel is provided between the hatch 1 c and the guide member 5 on the top end surface 1 a.

  The cylindrical body 2 includes an upper pipe 21 and a lower pipe 22 made of steel pipes having different diameters (a lower pipe 22 has a relatively large diameter), an upper sheath pipe 23 whose one end is fixed at an intermediate position of the upper pipe, and a lower pipe The tube 22 is composed of a lower sheath tube 24 having one end fixed to the upper end of the tube 22.

  The upper sheath tube 23 and the lower sheath tube 24 are made of steel pipes having the same diameter, and are connected to each other by an M-type gasket 25. The flexible joint 2 a is connected by the upper sheath tube 23, the lower sheath tube 24, and the gasket 25. Is configured.

  Further, a gasket mounting flange 22a is provided below the lower tube 22, and a ring-shaped fixed rubber gasket 4 is fixed to the lower surface of the gasket mounting flange 22a.

  The cylinder 2 suspended by the crane ship 3 via the wire W is suspended so that the gasket 4 at the lower end thereof is positioned on the gasket base 1d on the top end surface 1a of the submergence box 1. When the tubular body 2 is suspended, the tubular body 2 is suspended so as to be guided by the guide member 5 around the hatch 1c facing the top end surface 1a, whereby the gasket 4 can be efficiently used with respect to the gasket base 1d. Positioning becomes possible.

  In the state where the cylinder 2 is suspended by the crane ship 3, as shown in FIG. 2, by arranging the lower end of the cylinder 2 via the gasket 4 with respect to the top end surface 1 a of the submerged box 1, the gasket 4 is provided. The water pressure q acts on this, the gasket 4 is crushed by this water pressure q, and the cylindrical body 2 and the submerged box 1 are connected.

  In this connection structure, no bolts or welding are applied. That is, the cylinder 2 indirectly connected via the gasket 4 and the top end surface 1a of the sinking box 1 are not displaced in the horizontal direction or the vertical direction with respect to the sinking box 1 (friction by the gasket 4). A so-called pin coupling structure 10a is formed, which is only permitted to be inclined at an arbitrary angle (guaranteed by force or hydrostatic pressure).

  After the lower end of the cylinder 2 is disposed via the gasket 4 with respect to the top end surface 1a of the submergence box 1, seawater inside the cylinder 2 is drained out of the cylinder using a pump (not shown). .

  The upper end of the cylindrical body 2 faces the sea, and by opening the lid 1c ′ of the hatch 1c, the box 1b of the submerged box 1 leads to the inside of the cylindrical body 2 through the hatch 1c and further to the sea. become.

  As shown in FIG. 2, the inside of the cylindrical body 2 serves as a moving path for the gondola 6 suspended by a separate wire W ′ suspended from the upper end of the cylindrical body 2, and a rescuer is accommodated in the gondola 6. Then, it is hung inside the cylindrical body 2 (Y1 direction), and hung up to the inside 1b of the submerged box 1 through the hatch 1c. Personnel in the box 1b are accommodated in the gondola 6, lifted up to the sea, and rescued by the crane ship 3 etc. on the sea.

  Thus, in the state where the seawater inside the cylinder 2 is drained, the cylinder interior space forms a personnel rescue path 2b.

  As described above, when seawater is drained from the inside of the cylindrical body 2, buoyancy acts on the cylindrical body 2, and it is assumed that the gasket 4 cannot be sufficiently pressed downward by this buoyancy. When such a situation is assumed, a weight that can sufficiently press the gasket 4 even if buoyancy is applied is attached to the cylinder 2 or the reaction force mounted on the crane ship 3 is used. It is only necessary to take measures to prevent the cylinder 2 from being lifted via a frame or the like and to apply hydrostatic pressure to at least the gasket 4.

  FIG. 4 is a longitudinal sectional view explaining the flexible joint. The illustrated flexible joint 2a includes an upper sheath tube 23 (relatively larger in diameter than the upper tube 21) fixed to the upper tube 21, and a lower sheath tube 24 (upper sheath tube 23) fixed to the lower tube 22. The same diameter) is connected by an M-shaped annular gasket 25, and a water stop space 26 is formed by the upper tube 21, the lower tube 22, and the flexible joint 2a. The upper sheath tube 23 and the lower sheath tube 24 are connected to the gasket 25 by bonding with an adhesive and bonding with a bolt B.

  In the figure, the lower end 21a of the upper tube 21 is only in contact with the upper end of the lower tube 22, and both are cut off. Therefore, the upper tube 21 can be shifted in the horizontal direction or the vertical direction with respect to the lower tube 22.

  On the other hand, since the lower sheath tube 24 and the upper sheath tube 23 are connected to each other by a gasket 25 so as to be relatively displaceable, even when the upper tube 21 is displaced with respect to the lower tube 22, the lower tube 22 and the upper tube 21. Water-stopping between is guaranteed.

  Next, a displacement mode when the cylindrical body 2 is affected by the wave will be described with reference to FIG.

  Since the cylindrical body 2 is merely suspended by the crane ship 3 via the wire W, the gasket 4 is affected by the wave when the wave is strong, and the gasket 4 against the top end surface 1a of the submerged box 1. It inclines while pushing in one side (Z1 direction).

  However, the hydrostatic pressure q acting on the gasket 4 from the gasket mounting flange 22a of the cylindrical body 2 ensures the water-stopping property between the top end surface 1a of the submerged box 1 via the gasket 4.

  Moreover, depending on the state of the wave, the cylindrical body 2 is separated up and down while maintaining water-stopping properties via the flexible joint 2a. That is, the upper tube 21 can be inclined relative to the lower tube 22 of the cylindrical body 2 (Z2 direction), and thereby, the cylindrical body 2 is buckled or plasticized in the middle position due to the influence of waves. It is possible to suppress damage due to deformation or the like.

  Next, the method for connecting the bottom structure and the cylinder according to the present invention and the method for rescue personnel from within the bottom structure will be outlined.

  In this connection method, as shown in FIG. 1, a basic crushed stone CS is laid on the seabed BS, and a sinking box 1 is set up from one landway as needed, or the sinking box 1 is set from both landways toward a central position as needed. The submerged tunnel 20 is constructed by connecting the submerged boxes 1 to each other and connecting the two land routes with the seabed.

  After the construction of the submerged tunnel 20 (after the operation of the submerged tunnel 20) or during the construction of the submerged tunnel 20 (in the middle of construction), personnel are confined in the box 1b of the submerged box 1, and the construction company of the submerged tunnel 20 or the submerged When the management company of the tunnel 20 receives an emergency rescue request, the cylinder 2 is loaded on the crane ship 3 anchored on the nearby coast, and the crane ship 3 is placed in the submerged box 1 having the hatch 1c on the top end surface 1a. Close.

  The cylinder 2 is suspended by the crane ship 3, and the gasket 4 attached to the lower end of the cylinder 2 is positioned with respect to the gasket pedestal 1 d around the hatch 1 c on the top end surface 1 a of the sinking box 1.

  At this time, the cylindrical body 2 is suspended while being guided by the guide members 5 around the gasket pedestal 1d, so that the positioning efficiency of the cylindrical body 2 with respect to the top end surface 1a of the submerged box 1 is increased.

  By disposing the cylindrical body 2 at a predetermined position on the top end surface 1 a of the submerged box 1 via the gasket 4, hydrostatic pressure is applied to the lower end of the cylindrical body 2, and the cylindrical body 2 is inserted into the submerged box 1 via the gasket 4. Is joined to the top end surface 1a by hydraulic pressure (the first step of the connection method). That is, no bolts or welding are applied in joining the cylindrical body 2 and the submerged box 1.

  In this way, by connecting the cylinder 2 to the top end face 1a of the submerged box 1 via the gasket 4 without using bolts or the like, the time required for the connection between the two can be short.

  Rescue personnel connecting the top end surface 1a of the submerged box 1 and the cylinder 2 by water pressure bonding, draining seawater from the inside of the cylinder 2, opening the lid 1c 'of the hatch 1c, and connecting the box 1b and the sea. A path 2b is formed and a connecting structure 10 of the sinking box 1 (water bottom structure) and the cylindrical body 2 is formed (the second step of the connection method).

  The gondola 6 that accommodates the rescuer suspended by the wire W ′ is suspended inside the cylinder 2 (personal rescue path 2b), and further suspended to the inside of the box 1b. 6 and lift it on the crane ship 3 to rescue it at sea (the rescue method for personnel).

  In this way, after receiving an urgent request, the crane ship 3 is brought close to the predetermined submerged box 1 and the cylinder 2 is quickly connected to the submerged box 1 to form the personnel rescue path 2b. Under any marine conditions, personnel can be rescued quickly without relying on divers who cannot work under certain conditions.

  After the personnel rescue, the connection structure 10 can be quickly released simply by lifting the cylinder 2 with the crane ship 3, so that the operation of the submerged tunnel 20 and the start of the operation of the submerged tunnel 20 can be started promptly. it can.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Submerged box (water bottom structure), 1a ... Top end surface, 1b ... Inside of box, 1c ... Hatch, 1c '... Lid, Gasket base, 2 ... Cylindrical body, 2a ... Flexible joint, 2b ... Person rescue route 21 ... Upper tube, 22 ... Lower tube, 22a ... Gasket mounting flange, 23 ... Upper sheath tube, 24 ... Lower sheath tube, 25 ... Gasket, 3 ... Crane ship, 4 ... Gasket, 5 ... Guide member, 6 ... Gondola DESCRIPTION OF SYMBOLS 10 ... Connection structure, 10a ... Pin coupling structure, 20 ... Submerged tunnel, S ... Seawater, BS ... Submarine, CS ... Foundation crushed stone, W, W '... Wire

Claims (6)

At the position surrounding the hatch on the top end surface of the submarine structure, a cylinder suspended by a crane ship is disposed via a gasket,
A connecting structure of a water bottom structure and a cylindrical body, wherein the cylindrical body is connected to the top end face so as to be relatively displaceable by water pressure acting on the cylindrical body from the outside.   The submerged structure-cylinder connection structure according to claim 1, wherein the cylindrical body includes a flexible joint having water-stopping properties at an intermediate position.   The water bottom structure-cylinder connection structure according to claim 1 or 2, wherein a guide member is provided around the top end face hatch, and the cylinder is disposed inside the guide member. A cylinder suspended by a crane ship is disposed through a gasket at a position surrounding the hatch on the top end surface of the submarine structure, and water pressure is applied to the cylinder from outside, and the cylinder is caused by the water pressure. A first step of connecting the top end surface to the top end surface so as to be relatively displaceable;
A method for connecting a water bottom structure and a cylinder, comprising a second step of draining water from the cylinder to make the cylinder hollow.   The said 1st step WHEREIN: The guide member is attached to the circumference | surroundings of the hatch of the said top end surface, and the cylinder suspended by the crane ship is positioned around a hatch, guiding with this guide member. To connect the bottom structure and the cylinder. In response to a request for rescue of personnel inside the submarine structure, the crane ship loaded with the cylinder body accessed the submarine structure,
Applying the connection method according to claim 4 or 5 to connect the bottom structure and the cylinder through the first step and the second step,
A method for relieving personnel from within a submarine structure, wherein a lid provided by the hatch is opened, and the cylinder is used as a personnel rescue path that connects the interior and exterior of the submarine structure.

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