JP2015124053A - Goliath crane production method and decomposition method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble or decompose a goliath crane at a site without using a floating crane.SOLUTION: A girder 8 is mounted on a barge type platform 17 movable in a pool 3, and the water level of the pool 3 is raised, for lifting up the barge type platform 17 and lifting up the girder 8. In another method, by lowering the water level of the pool 3, the barge type platform 17 is lowered for lowering down the girder 8. Thereby the girder 8 is lifted up and lowered down and then bridged over leg parts 18, 19. In addition, in a state that the girder is supported by using the barge type platform, the leg parts are partitioned vertically, for decomposition.

Description

  The present invention relates to a Goliath crane manufacturing method for assembling Goliath cranes on site. The present invention relates to a Goliath crane dismantling method for dismantling Goliath cranes on site.

  For example, a Goliath crane (giant crane) capable of moving a large structure up and down is installed in a dock at a shipyard. When building or repairing a ship, a large structure can be lifted and moved using a Goliath crane. The Goliath crane has a pair of legs disposed on both sides of a pool capable of storing seawater, and a girder that is spanned in a substantially horizontal direction between the pair of legs.

  As a method for disassembling the Goliath crane, there is a technique described in JP 2010-180613 A (Patent Document 1). Patent Document 1 discloses that a Goliath crane is lifted as it is from the sea side using a floating crane that can move on the sea, and is slowly tilted at a predetermined location.

JP 2010-180613 A

  There are only a few floating cranes available in Japan for dismantling Goliath cranes. In Japan's neighboring countries, for example, there are only a few in Korea, and there are no floating cranes in Taiwan. Therefore, there is a demand for a method of dismantling the Goliath crane without using a floating crane.

  In addition, when assembling a new Goliath crane on site, it is possible to assemble a Goliath crane from the sea side using a floating crane. However, as described above, there are only a few floating cranes. There is a need for a method of assembling a Goliath crane without using a crane.

  Moreover, as a method of assembling the Goliath crane, there is a method of lifting the girder portion of the Goliath crane using a self-supporting portal lifter (strand jack). However, with this method, the conveyance speed for lifting the object upward is slow, and the construction period is long. Moreover, the construction method using this strand jack cannot be implemented in the dock which cannot secure the earth pressure required for installing the strand jack. In order to secure the necessary earth pressure, it is not realistic to reinforce the foundation because it takes too much cost and time.

  An object of this invention is to provide the manufacturing method of a Goliath crane which can assemble a Goliath crane on-site without using a floating crane. Another object of the present invention is to provide a Goliath crane dismantling method that dismantles a Goliath crane on site without using a floating crane.

  The present invention is a method for assembling and manufacturing a Goliath crane arranged across a pool for storing water, the strength member constituting the Goliath crane is mounted on a trolley, and the trolley is moved into the pool. A carrying-in process for carrying in the strength member, a rising process for moving the strength member upward by raising the water level of the pool and raising the trolley, and an attaching process for attaching the strength member moved upward to another strength member And.

  In this Goliath crane manufacturing method, a strength member constituting the Goliath crane can be carried in using a trolley that is movable in the pool. By raising the water level of the pool, the barge can be raised and the strength member mounted on the barge can be moved upward. Then, the strength member moved upward can be attached to another strength member. According to this Goliath crane manufacturing method, it is possible to carry in the strength member by using the trolley, move the strength member upward, and attach it to another strength member without using the floating crane.

  Here, the Goliath crane has a pair of leg portions respectively disposed on the quay walls on both sides of the pool, and a girder spanned across the pair of leg portions. The Goliath crane manufacturing method includes a leg preparation step for preparing a leg portion on a quay, a loading step for loading a girder as a strength member on a trolley, moving the trolley into a pool, and loading the girder; By moving the girder upward by moving the girder upward by raising the water level of the water and moving the girder in the pool and moving the girder closer to the legs that are other strength members You may provide the movement process in a pool, and the attachment process which attaches a girder to a leg part.

  In this Goliath crane manufacturing method, the legs are arranged at predetermined positions on the quay, and the legs are arranged upright to prepare the legs. Carry in the girder using a trolley. The pool level can be raised to raise the trolley and move the girder upward. Use a trolley to move the girder to the vicinity of the legs. Attach the moved girder to the leg. The girder can be attached to the leg by such a procedure.

  In addition, the Goliath crane manufacturing method includes a carrying-in process of carrying in a girder that is divided into a plurality of parts, and a girder assembling process in which a girder is lifted using an existing crane and the girder is connected and assembled on a carrier And may be executed. Thereby, it can convey to the vicinity of the place which installs a Goliath crane in the state divided | segmented into several, and can connect and assemble several components using the existing crane in the field.

  In addition, the Goliath crane manufacturing method is prepared with the legs divided into upper and lower parts, and the traveling device provided at the lower end of the legs is arranged on the track of the quay and the upper side of the legs The leg preparation step for placing the part of the leg in the position adjacent to the track, the attachment step of attaching the girder to the upper part of the leg part, the upper part of the leg part and the girder are placed on the carriage, and the pool Raise the water level and move the upper part of the leg part and the girder upward, and the upper part of the leg part with the girder assembled on the temporary support frame placed on the quay You may perform the provisional receiving process which provisionally receives, and the leg part joining process which arrange | positions and joins the part of the upper side of the leg part assembled | attached to the girder on the lower end part of a leg part. Thus, after provisionally receiving the girder attached to the upper portion of the leg, the upper portion of the leg may be joined to the lower end of the leg to which the traveling device is attached. . Thereby, the upper part of a girder and a leg part can be raised in steps, and a girder can be raised by the height more than the fluctuation range of the water level of a pool.

  In addition, the Goliath crane manufacturing method includes a support height adjustment step in which the water level of the pool is lowered, the trolley is lowered, and a height adjustment spacer is placed on the support pedestal of the trolley. A girder in which the upper part of the leg portion is assembled on the ship, and the water level is raised to move the girder and the upper part of the leg portion upward. Good. By mounting the spacer on the carriage in this way, the height for supporting the girder on the carriage can be changed high.

  The present invention is a method for disassembling a Goliath crane disposed across a pool for storing water, the Goliath crane comprising a pair of legs respectively installed on a quay on both sides of the pool, and a pair of legs. And a girder supporting process for supporting the girder using a trolley that is movable in the pool, and in the state that the girder is supported, the legs are cut up and down. The leg splitting process to divide into two parts, the carriage to move in the pool and the girder and the upper part of the leg to move in the pool, and the water level in the pool to lower and the truck to descend A lowering step of lowering the girder and a dismantling step of disposing the girder and the upper part of the leg on the quay and disassembling.

  In this method of disassembling Goliath cranes, the trolley is moved in the pool, the trolley is placed below the girder, the water level of the pool is raised to raise the trolley, and the girder is lowered using the trolley. Support from. While supporting the girder, the leg is split up and down. The trolley carrying the girder and the upper part of the leg is moved in the pool. Lower the water level in the pool and lower the trolley supporting the girder. The upper part of the girder and legs can be placed on the quay and disassembled. According to the dismantling method of this Goliath crane, the girder is supported by using a barge without using a floating crane, the legs are divided into upper and lower parts, and the girder is moved and lowered using the barge. The girder and the upper part of the leg can be divided and disassembled at the quay.

  The Goliath crane dismantling method involves moving the carriage in the pool and moving the girder and the upper part of the leg toward the temporary support frame provided on the quay, Temporary receiving process of provisionally receiving the upper part with the temporary support gantry, and the upper part of the leg portion placed on the temporary support cradle by lowering the support height for supporting the girder on the trolley A girder supporting step for supporting the girder connected to the girder.

  In this Goliath crane dismantling method, the girder and the upper part of the leg can be temporarily received by the temporary support stand provided on the quay, so the girder and the upper part of the leg are lowered stepwise. Can be made. By lowering in steps as described above, it is possible to lower the height by more than the fluctuation range of the water level of the pool.

  The method of dismantling the Goliath crane is that the girder and the leg part are rotated by using a rotating process for changing the direction of the girder by rotating a carriage supporting the upper part of the girder and leg part in the pool, and an existing crane. And a lifting step of lifting the upper side of the base plate and moving it on the quay. A girder extending in a direction crossing the longitudinal direction of the pool can be rotated using a carriage to change the extending direction of the girder. By changing the direction in which the girder extends and arranging the girder obliquely with respect to the longitudinal direction of the pool, the girder can be stored between the legs of the existing crane. Thereby, the girder to be disassembled can be lifted using an existing crane and placed on the quay adjacent to the pool.

  According to the Goliath crane manufacturing method of the present invention, the Goliath crane can be assembled on site without using a floating crane. According to the Goliath crane disassembly method of the present invention, the Goliath crane can be dismantled on site without using a floating crane.

It is a front view which shows a Goliath crane. It is a flowchart which shows the procedure of the manufacturing method of the Goliath crane which concerns on 1st Embodiment. It is a front view which shows the dock of the state by which a leg part is arrange | positioned on the quay and the girder parts are carried in. It is a perspective view which shows the dock of the state in which the carrier ship carrying the girder parts is arrange | positioned diagonally with respect to the Y direction. It is a perspective view which shows the dock of the state which spanned the girder over a pair of leg part main body. It is a perspective view which shows the dock of the state which received a pair of leg part main body temporarily with the temporary support stand. It is a perspective view which shows the state which supported the girder using the base boat which mounted the spacer on the support stand. It is a perspective view which shows a Goliath crane of the state which supported the girder using the trolley and the leg part was connected. It is a flowchart which shows the procedure of the dismantling method of the Goliath crane which concerns on 2nd Embodiment. It is a front view which shows the state which is supporting the girder of a Goliath crane using a carrier ship. It is a perspective view which shows the state which received the leg main body temporarily with the temporary support stand on a quay. It is a perspective view which shows the state which has removed the spacer from the support stand of a trolley. It is a front view which shows the state which supported the girder using the trolley. It is a perspective view which shows the state which moved the girder using the trolley and arrange | positioned a pair of leg part main body to the opposite quay, respectively. It is a perspective view which shows the state which rotated the trolley and changed the direction of the girder. It is a perspective view which shows the state which lifted the girder using the existing Goliath crane and has arrange | positioned on the quay.

  Hereinafter, embodiments of a Goliath crane manufacturing method and a disassembling method according to the present invention will be described in detail with reference to the drawings. A Goliath crane manufacturing method will be described as a first embodiment, and a Goliath crane disassembly method will be described as a second embodiment.

(First embodiment)
First, the Goliath crane 2 installed in the dock 1 will be described with reference to FIG. The dock 1 of the shipyard is provided with a pool 3 capable of storing water and adjusting the water level, and quays 4 and 5 are arranged on both sides of the pool 3. The Goliath crane 2 includes a pair of leg portions 6 and 7 disposed on the quay walls 4 and 5, and a girder 8 spanned between the pair of leg portions 6 and 7, respectively.

  The dock 1 is provided adjacent to the sea, the pool 3 has a predetermined length, and one end of the pool 3 is connected to the sea. An opening / closing gate 3a is provided at an end of the pool 3 on the sea side so that seawater can flow into the pool 3, and closing the opening / closing gate 3a can block seawater between the pool 3 and the sea. it can. The pool 3 is provided with a pump for adjusting the water level WL in the pool 3. The pool 3 and the sea are connected by piping, and a pump is connected to the piping. The water level WL of the pool 3 can be lowered by operating the pump to discharge the water in the pool 3 to the sea. Also. The water level WL of the pool 3 can be raised by operating the pump and feeding seawater into the pool 3. Note that both ends of the pool 3 may be connected to the sea.

  The dock 1 may not be adjacent to the sea, or may be adjacent to a river or a lake. Moreover, the method of adjusting the water level of the pool 3 is not limited to what uses a pump, Other methods may be used. For example, the water level WL of the pool 3 may be raised by providing a storage tank adjacent to the pool 3 and allowing the water in the storage tank to flow into the pool 3. Further, the water level WL of the pool 3 may be adjusted by opening and closing the open / close gate 3a.

  One quay 4 adjacent to the pool 3 has a wider width (length in the X direction in the drawing) than the other quay 5 opposed across the pool 3. One quay 4 can mount various parts, a block body, etc. at the time of shipbuilding, for example. Rails (tracks) 9 to 12 are respectively provided on the pair of quays 4 and 5. The rails 9 to 12 extend along the longitudinal direction (Y direction in the drawing) of the pool 3. The rails 9 and 11 are disposed on the quay 4, and the rails 10 and 12 are disposed on the quay 5.

  The dock 1 is provided with existing Goliath cranes 13 and 14 (see FIGS. 4, 5, 7 and 8) in addition to the Goliath crane 2. The Goliath cranes 2 and 14 travel along the pair of rails 9 and 10, and the Goliath crane 13 travels along the pair of rails 11 and 12. In the dock 1, a new Goliath crane 2, an existing Goliath crane 13, and an existing Goliath crane 14 are arranged in order from the sea side.

  The Goliath crane 2 has a leg portion 6 that is a rigid leg and a leg portion 7 that is a swing leg as a pair of leg portions 6 and 7. The rigidity of the rigid leg is higher than the rigidity of the swing leg. The leg 6 can move on the rail 9 of the quay 4, and the leg 7 can move on the rail 10 on the quay 5. Traveling devices 15 for traveling on the rails 9 and 10 are provided at the lower end portions 6a and 7a of the leg portions 6 and 7, respectively. The traveling device 15 is provided with a plurality of wheels.

  The Goliath crane 2 has a trolley 16 that can move along the girder 8, and the trolley 16 is provided with a lifting device for lifting heavy objects. The Goliath crane 2 can lift and carry heavy objects. The existing Goliath cranes 13 and 14 have the same configuration as the Goliath crane 2.

(Manufacturing method of Goliath crane 2)
Next, a method for assembling and manufacturing the Goliath crane 2 on site will be described. In this Goliath crane manufacturing method, the Goliath crane 2 is assembled using the existing Goliath cranes 13 and 14 and the carriage 17 (see FIG. 3) without using the floating crane. FIG. 2 is a flowchart showing the procedure of the Goliath crane manufacturing method.

(Leg preparation step S1)
In the manufacturing method of the Goliath crane 2, first, the leg preparation step S1 is executed. As shown in FIGS. 3 and 4, in the leg preparation step S1, the legs 6 and 7 are prepared in a state of being vertically divided. The leg portions 6 and 7 are vertically divided into lower end portions 6a and 7a including the traveling device 15, and leg main bodies 18 and 19 which are upper side portions including the upper end portions 6b and 7b.

  The lower end portion 6 a of the leg portion 6 is disposed on the rail 9, and the lower end portion 7 a of the leg portion 7 is disposed on the rail 10. The leg main body 18 of the leg 6 is disposed on the quay 4 adjacent to the pool 3 side of the rail 9. The leg main body 19 of the leg 7 is arranged on the quay 5 adjacent to the side opposite to the pool 3 of the rail 10. The leg main bodies 18 and 19 are arranged upright in the vertical direction.

  On the quay 4, a temporary receiving stand 26 for temporarily receiving the leg main body 18 is provided adjacent to the pool main body 18 on the side of the pool 3. On the quay 5, a temporary receiving stand 27 for temporarily receiving the leg main body 19 is provided adjacent to the opposite side of the leg main body 19 to the pool 3. The temporary receiving stands 26 and 27 are used in a temporary receiving step S10 described later, and will be described in detail later. The temporary support bases 26 and 27 support the leg main bodies 18 and 19 at a position higher than the placement surface of the quay walls 4 and 5. The placement surfaces of the quay walls 4 and 5 are surfaces on which the leg main bodies 18 and 19 are placed in the leg preparation step S1.

(Transportation process S2)
After performing the leg preparation step S1, the carry-in step S2 is performed. In the carry-in process S <b> 2, the girder 8 is carried into the pool 3 using the carriage 17. The girder 8 is mounted on the carriage 17 and carried in a state divided into a plurality of parts. The girder 8 is divided into a plurality (for example, three) in the longitudinal direction, and has girder parts 20 to 22 which are divided parts. The girder part 21 is the central part of the girder 8. The girder part 20 is one end, which is a part connected to the upper end 6 b of the leg 6, and the girder part 22 is the other end, a part connected to the upper end 7 b of the leg 7. is there.

  The trolley 17 is movable on the water and has a support base 23 for supporting the girder 8. A plurality of spacers 24 and 25 that are mounted on the upper end portion of the support base 23 and adjust the support height of the base ship 17 are mounted on the base ship 17. In the carrier 17, regions where the spacers 24 and 25 and the girder parts 20 and 22 are mounted are formed before and after the support base 23. In the carrying-in process S <b> 2, the girder part 21 is mounted on the support base 23, the spacer 24 and the girder part 22 are mounted in the area on the front side of the carriage 17, and the spacer 25 and the girder in the area on the rear side of the carriage 17. A component 21 is mounted. The longitudinal direction of the girder parts 20-22 is arrange | positioned in the direction which cross | intersects the front-back direction of the trolley 17, for example.

  The trolley 17 loaded with the girder parts 20 enters the pool 3 through the open / close gate 3a from the sea side. It passes between the leg main bodies 18 and 19 and is conveyed to the vicinity of the leg main bodies 18 and 19.

(Girder assembly process S3)
After performing the carrying-in process S2, the girder assembly process S4 is performed. In the girder assembling step S <b> 3, the girder parts 20 and 22 are lifted using the existing Goliath cranes 13 and 14, and the girder parts 20 to 22 are connected on the carriage 17 to assemble the girder 8.

  In the girder assembling step S3, as shown in FIG. 4, the carriage 17 is rotated to change the orientation of the carriage 17. The longitudinal direction of the trolley 17 is arranged obliquely with respect to the longitudinal direction of the pool 3. For example, the front side of the carriage 17 is directed toward the quay 5 side, and the rear side of the carriage 17 is directed toward the quay 4 side. Next, the water level of the pool 3 is lowered to bring the trolley 17 into a lowered state. Accordingly, the carriage 17 is arranged so that the girder parts 20 and 22 can be lifted and attached to the girder part 21 using the existing Goliath cranes 13 and 14.

  After changing the attitude of the carrier 17, the girder part 22 is lifted using the existing Goliath cranes 13 and 14 and connected to the girder part 21 on the support base 23. After connecting the girder parts 21, the water level of the pool 3 is raised and the posture of the carriage 17 is returned to the original position. Next, after opening the open / close gate 3a and moving the carrier 17 to the sea, the carrier 17 is rotated 180 times so that the carrier 17 is reversed and moved again into the pool 3. If the carriage 17 can turn in the pool 3 with the girder 8 mounted, the carriage 17 is turned in the pool without moving to the sea, and the orientation of the carriage 17 is changed. Also good.

  When the carriage 17 is moved again into the pool 3, the side on which the spacer 24 and the girder part 20 are mounted is the front side, and after the carriage 17 is moved into the pool 3, the open / close gate 3a is closed. After closing the open / close gate 3a, the carriage 17 is rotated so that the longitudinal direction of the carriage 17 is obliquely arranged with respect to the longitudinal direction of the pool 3, and the front side of the carriage 17 faces the quay 5 so that the carriage 17 The rear side faces the quay 4. Next, the water level of the pool 3 is lowered to bring the carriage 17 into a lowered state, and the girder part 20 is lifted using the existing Goliath cranes 13 and 14 and connected to the girder part 21 on the support base 23. To do. Thereby, the girder parts 20-22 are connected, and the girder 8 is assembled. Although the girder 8 is assembled in the pool 3, the already assembled girder 8 may be carried into the pool 3 using the carriage 17.

(Rising process S4)
After performing the girder assembly process S3, the ascending process S4 is performed. In the ascending step S4, the water level of the pool 3 is raised, and the trolley 17 equipped with the girder 8 is raised. Thereby, the height of the lower surface of the girder 8 is arrange | positioned in the position higher than the upper end parts 6b and 7b of the leg main bodies 18 and 19 prepared by leg part preparation process S1. After raising the carrier 17, the carrier 17 is rotated so that the longitudinal direction of the carrier 17 is arranged in the direction along the longitudinal direction of the pool 3, and the longitudinal direction of the girder 8 is set to the longitudinal direction of the pool 3 (Y The direction (direction in which the rails 9 to 12 extend) and the direction intersecting with the direction (X direction).

(Movement process S5 in the pool)
After executing the ascending step S4, the in-pool moving step S5 is executed. In the in-pool moving process S5, the carriage 17 is moved to the sea side. The trolley 17 is moved until it is disposed between the pair of leg main bodies 18 and 19. As shown in FIG. 5, when the carriage 17 reaches between the pair of leg main bodies 18, 19, one end of the girder 8 is disposed above the leg main body 18, The other end is disposed above the leg main body 19.

(Installation process S6)
After performing in-pool movement process S5, attachment process S6 is performed. In the attachment step S6, the position of the carriage 17 is finely adjusted so that the girder 8 is correctly arranged with respect to the leg main bodies 18 and 19. When the position of the girder 8 is determined, the carriage 17 is lowered, the girder 8 is placed on the leg main bodies 18 and 19, welding is performed, and the girder 8 is fixed to the leg main bodies 18 and 19.

(Support height adjustment step S7)
After performing attachment process S6, support height adjustment process S7 is performed. In the support height adjustment step S <b> 7, the carriage 17 is lowered to form a gap between the support stand 23 of the carriage 17 and the girder 8, so that the carriage 17 does not support the girder 8. . Next, the carriage 17 is moved to the opposite side of the sea, and the girder 8 and the carriage 17 are separated. Using the existing Goliath cranes 13 and 14, the spacer 24 is lifted and placed on the upper end of the support base 23. Thereby, the support height in the carrier 17 can be raised by the height of the spacer 24.

  Next, the water level of the pool 3 is lowered to lower the carriage 17 so that the top surface of the spacer 24 is lower than the bottom surface of the girder 8. The trolley 17 is moved toward the girder 8 and is arranged directly below the girder 8 as shown in FIG.

(Rising process S8)
After performing the support height adjustment process 7, the ascending process S8 is performed. In the ascending step S <b> 8, the water level in the pool 3 is raised, the girder 8 is mounted on the spacer 24 arranged on the support base 23 of the carriage 17, and the carriage 17 is raised. Thereby, the leg main bodies 18 and 19 are raised together with the girder 8.

(Movement process S9 in the pool)
After executing the ascending step S8, the in-pool moving step S9 is executed. In the in-pool moving step S9, the carriage 17 is moved to the quay 5 side in the width direction (X direction) of the pool 3. As shown in FIG. 6, the carriage 17 is moved so that the leg main body 18 is disposed right above the receiving stand 26 and the leg main body 19 is placed right above the receiving stand 27.

(Tentative receiving step S10)
After performing in-pool movement process S9, provisional reception process S10 is performed. In the temporary receiving step S10, the water level of the pool 3 is lowered, the carriage 17 is lowered, the leg main body 18 is disposed on the temporary receiving rack 26, and the leg main body 19 is disposed on the temporary receiving rack 27. can do. The leg main bodies 18 and 19 and the girder 8 are supported by the temporary support bases 26 and 27 at a position higher than the mounting surface of the quay walls 4 and 5.

(Support height adjustment step S11)
After performing provisional receiving process S10, support height adjustment process S11 is performed. In the support height adjustment step S <b> 11, the carriage 17 is lowered to form a gap between the spacer 24 on the support stand 23 of the carriage 17 and the girder 8, so that the carriage 17 supports the girder 8. No state. Next, the carriage 17 is moved to the side opposite to the sea (the side where the existing Goliath cranes 13 and 14 are arranged), and the carriage 17 is separated from the girder 8. Using the existing Goliath cranes 13 and 14, the spacer 25 is lifted and further placed on the spacer 24 placed on the support base 23. Thereby, the support height in the trolley 17 can be raised by setting the spacers 24 and 25 in two stages.

  Next, the water level of the pool 3 is lowered to lower the carriage 17 so that the top surface of the upper spacer 25 is positioned lower than the bottom surface of the girder 8. The trolley 17 is moved toward the girder 8 and is arranged just below the girder 8.

(Rising step S12)
After performing support height adjustment process S11, raise process S12 is performed. In the ascending step S12, the water level in the pool 3 is raised, and as shown in FIG. 7, the girder 8 is mounted on the upper spacer 25 arranged on the support base 23 of the base boat 17, and the base boat 17 is Raise. Thereby, the leg main bodies 18 and 19 are raised together with the girder 8.

(Movement process S13 in the pool)
After executing the ascending step S12, the in-pool moving step S13 is executed. In the in-pool movement process S13, the carriage 17 is moved in the width direction (X direction) of the pool 3 toward the quay 4 side. As shown in FIG. 8, the base body 18 is disposed directly above the lower end portion 6 a of the leg portion 6, and the leg body 19 is disposed directly above the lower end portion 7 a of the leg portion 7. The ship 17 is moved.

(Leg joining step S14)
After performing in-pool movement process S13, leg joint process S14 is performed. In the leg joining step S <b> 14, the water level of the pool 3 is lowered, the carriage 17 is lowered, the leg main body 18 is placed on the lower end 6 a of the leg 6, and the leg main body 19 is placed on the lower end of the leg 7. Place on 7a. Subsequently, the leg main body 18 and the lower end 6a are joined, and the leg main body 19 and the lower end 7a are joined. While supporting the girder 8 from below by the carriage 17, the leg main body 18 and the lower end 6a are welded, and the leg main body 19 and the lower end 7a are welded. Thereby, a pair of leg parts 6 and 7 are connected, respectively, and the Goliath crane 2 is assembled.

  According to such a Goliath crane manufacturing method, the Goliath crane 2 can be assembled at the site using the carrier 17 without using a floating crane.

  According to the Goliath crane manufacturing method, the spacers 24 and 25 can be mounted on the support base 23 of the carriage 17 to adjust the support height in the carriage 17, so the adjustable fluctuation level of the water level in the pool ( Even when there is a restriction on the difference between the highest water level and the lowest water level, the support height of the girder 8 by the trolley 17 can be suitably adjusted. If you try to adjust the height of the supported girder 8 by adjusting the height of the carrier 17 just by changing the water level of the pool 3, the depth of the pool 3 will be increased and the fluctuation range of the water level will be increased. There is a need to. However, since it is not realistic to modify the existing dock pool, the height that can be adjusted in the existing pool is suitably increased by combining the water level adjustment of the pool and the height adjustment by the spacer (the fluctuation range is reduced). Large).

(Second Embodiment)
With reference to FIGS. 9-16, the disassembly method of a Goliath crane is demonstrated. The Goliath crane 32 installed in the dock 31 will be described. The same description as in the above embodiment is omitted. The dock 31 is provided with a pool 3 capable of storing water and adjusting the water level, and quays 4 and 5 are disposed on both sides of the pool 3. The Goliath crane 32 includes a pair of leg portions 36 and 37 disposed on the quay walls 4 and 5, and a girder 8 spanned between the pair of leg portions 36 and 37.

  The dock 31 is provided adjacent to the sea, the pool 3 has a predetermined length, and one end of the pool 3 is connected to the sea. An opening / closing gate 3a is provided at an end of the pool 3 on the sea side so that seawater can flow into the pool 3, and closing the opening / closing gate 3a can block seawater between the pool 3 and the sea. it can. The pool 3 is provided with a pump for adjusting the water level WL in the pool 3. The pool 3 and the sea are connected by piping, and a pump is connected to the piping. The water level WL of the pool 3 can be lowered by operating the pump to discharge the water in the pool 3 to the sea. Also. The water level WL of the pool 3 can be raised by operating the pump and feeding seawater into the pool 3.

  The dock 31 is provided with existing Goliath cranes 43 and 44 in addition to the Goliath crane 32. The Goliath cranes 32 and 44 travel along the pair of rails 11 and 12, and the Goliath crane 43 travels along the pair of rails 9 and 10. In the dock 31, a Goliath crane 44, a Goliath crane 43, and a Goliath crane 32 are arranged in this order from the sea side.

  The Goliath crane 32 has a leg portion 36 that is a rocking leg and a leg portion 37 that is a rigid leg as a pair of leg portions 36 and 37. The rigidity of the rigid leg is higher than the rigidity of the swing leg. The leg 36 can move on the rail 11 of the quay 4, and the leg 37 can move on the rail 12 on the quay 5. Traveling devices 15 for traveling on the rails 11 and 12 are provided at the lower end portions 36a and 37a of the leg portions 36 and 37, respectively. The traveling device 15 is provided with a plurality of wheels.

  The Goliath crane 32 has a trolley 16 that can move along a girder 38, and the trolley 16 is provided with a lifting device for lifting heavy objects. The Goliath crane 32 can lift and carry heavy objects. The existing Goliath cranes 43 and 44 have the same configuration as the Goliath crane 32.

(Method for dismantling Goliath Crane 32)
Next, a method for dismantling the Goliath crane 32 on site will be described. In this Goliath crane disassembly method, the Goliath crane 32 is disassembled using the existing Goliath cranes 43 and 44 without using a floating crane. FIG. 9 is a flowchart showing the procedure of the Goliath crane dismantling method.

(Girder support process S21)
In the method of disassembling the Goliath crane 32, first, the girder support step S21 is executed. As shown in FIG. 10, the carriage 17 has a support base 23 for supporting the girder 38. A spacer 24 is placed on the support base 23 of the carriage 17. In the girder support step S21, the carriage 17 is moved to just below the girder 38, the water level of the pool 3 is raised, and the spacer 24 is pressed against the bottom surface of the girder 38 from below. Thereby, the girder 38 is supported from below using the carrier 17.

(Leg division step S22)
After executing the girder support step S21, the leg division step S22 is executed. In the leg part dividing step S22, the leg parts 36 and 37 are cut and divided into upper and lower parts while the girder 38 is supported using the carriage 17. The leg part 36 is cut | disconnected by the lower end part 36a containing the traveling apparatus 15, and the leg part main body 48 (part on the upper side) which is a part above the lower end part 36a. The leg part 37 is cut | disconnected into the lower end part 37a containing the traveling apparatus 15, and the leg part main body 49 (upper part) which is a part above the lower end part 37a.

(Movement process S23 in the pool)
After executing the leg division step S22, the in-pool movement step S23 is executed. In the in-pool moving step S23, the carriage 17 is moved in the pool 3, and the leg bodies 48 and 49 connected to both ends of the girder 38 and the girder 38 are moved. As shown in FIG. 11, a temporary receiving stand 46 is provided on the rail 11, and a temporary receiving stand 47 is provided on the rail 12. The temporary support base 46 supports the leg main body 48 from below, and the temporary support base 47 supports the leg main body 49 from below. The temporary receiving stands 46 and 47 are lower than the cut lower end portions 36a and 37a. In the in-pool movement process S23, the carriage 17 is moved to the vicinity of the temporary receiving racks 46 and 47, the leg main body 48 is disposed above the temporary receiving rack 46, and the leg main body 49 is disposed above the temporary receiving rack 47. To be.

(Descent process S24)
After executing the in-pool moving step S23, the descending step S24 is executed. In the descent process S24, the water level of the pool 3 is lowered to lower the trolley 17, and the girder 38 and the leg main bodies 48, 49 are lowered.

(Tentative receiving step S25)
After performing descent process S24, provisional reception process S25 is performed. In the temporary receiving step S25, the carriage 17 is lowered and the leg main bodies 48 and 49 are placed on the temporary receiving frames 46 and 47 and temporarily received. Thereby, the leg main bodies 48 and 49 are arranged upright on the temporary support bases 46 and 47, and the girder 38 is in a state before the leg portions 36 and 37 are cut (before the leg division step S22 is executed). Is also located at a lower position.

  The leg main bodies 48 and 49 are temporarily received by the temporary support bases 46 and 47, and the base boat 17 is lowered to form a gap between the spacer 24 on the support base 23 and the bottom surface of the girder 38. Subsequently, the carriage 17 is moved to the existing Goliath cranes 43 and 44 side.

(Support height adjustment step S26)
After performing provisional receiving process S25, support height adjustment process S26 is performed. In the support height adjustment step S <b> 26, as shown in FIG. 12, the spacer 24 is lifted and removed from the upper end portion of the support base 23 using existing Goliath cranes 44 and 44. Thereby, the support height in the carriage 17 can be lowered by the height of the spacer 24. In FIG. 12, illustration of members such as wire ropes and hooks for lifting the spacer 24 is omitted (the same applies to FIGS. 15 and 16).

(Girder support process S27)
After executing the support height adjustment step S27, the girder support step S27 is executed. In the girder support step S <b> 27, the carriage 17 is moved to the vicinity of the temporary receiving racks 46 and 47, and the carriage 17 is arranged directly below the girder 38. Subsequently, the water level of the pool 3 is raised, the upper end portion of the support base 23 is pressed against the bottom surface of the girder 38 from below, and the leg main bodies 48 and 49 are lifted from the temporary support bases 46 and 47. Thereby, the girder 38 is supported from below using the carrier 17.

(Movement process S28 in the pool)
After executing the girder support step S27, the in-pool movement step S28 is executed. In the in-pool movement process S27, the carriage 17 is moved in the pool 3, and the girder 38 and the leg main bodies 48, 49 are shifted from the temporary support bases 46, 47 to the sea side.

(Descent process S29)
After executing the in-pool moving step S28, the descending step S29 is executed. In the descent step S29, the water level of the pool 3 is lowered to lower the trolley 17, and the girder 38 and the leg main bodies 48, 49 are lowered. By lowering the carrier 17, the leg main body 48 is landed on the quay 4 and the leg main body 49 is landed on the quay 5 as shown in FIG. 14. Accordingly, the girder 38 is disposed at a position lower than the state where the leg main bodies 48 and 49 are temporarily received by the temporary receiving stands 46 and 47.

(Girder support process S30)
After executing the support height adjustment step S29, the girder support step S30 is executed. In the girder support step S30, the level of the pool 3 in the pool 3 is raised and the leg main bodies 48 and 49 are floated from the quays 4 and 5 in a state where the trolley 17 is disposed directly below the girder 38.

(Rotation process S31)
After executing the girder support step S30, the rotation step S31 is executed. In the rotation step S31, the carriage 17 is rotated in the pool 3 to change the orientation of the carriage 17. As shown in FIG. 15, the longitudinal direction of the pool 3 is the longitudinal direction of the pool 3 so that the front part of the carriage 17 faces the quay 4 and the rear part of the carriage 17 faces the quay 5. The direction of the girder 38 is changed so as to be arranged obliquely with respect to the (Y direction). In the width direction (X direction) of the pool 3, the girder 38 is placed between the legs of the existing Goliath cranes 43 and 44.

(Lifting step S32)
After performing rotation process S31, lifting process S32 is performed. In the lifting step S32, the existing Goliath cranes 43 and 44 are moved and placed on the girder 38, and the girder 38 is lifted using the Goliath cranes 43 and 44. In the lifting step S32, the girder 38 is moved onto the quay 4 using the Goliath cranes 43 and 44, and the direction of the girder 38 is changed. As shown in FIG. 16, the direction of the girder 38 is changed so that the longitudinal direction of the girder 38 is along the longitudinal direction (Y direction) of the quay 4. The girder 38 suspended from the Goliath cranes 43 and 44 is lowered, and the leg main bodies 48 and 49 are placed on the quay 4.

(Dismantling step S33)
After performing the lifting process S32, the dismantling process S33 is performed. In the dismantling step S33, the girder 38 and the leg main bodies 48 and 49 placed on the quay 4 are disassembled. In the disassembling step S33, the girder 38 and the leg main bodies 48 and 49 are cut to a small size so that they can be carried out from the dock 31.

  According to such a Goliath crane dismantling method, the Goliath crane 32 can be dismantled on site using the carrier 17 without using a floating crane.

  The present invention is not limited to the above-described embodiments, and various modifications as described below are possible without departing from the gist of the present invention.

  In the embodiment described above, the girder 8 is raised or lowered by using the carriage 17 in a plurality of times, but it may be raised or lowered only once.

  Moreover, in the said embodiment, although the girder 8 and the spacer are lifted and moved using the existing Goliath crane, you may use another crane and a raising / lowering mechanism.

  DESCRIPTION OF SYMBOLS 1,31 ... Dock, 2,32 ... Goliath crane, 3 ... Pool 3, 4, 5 ... Quay, 6, 7, 36, 7 ... Leg part, 8 ... Girder, 9-12 ... Rail, 13, 14 ... Existing Goliath crane, 15 ... traveling device, 16 ... trolley, 17 ... trolley, 18, 19, 48, 49 ... leg body (upper part of leg), 20-22 ... girder parts, 23 ... trolley 24, 25 ... spacers, 26, 27, 46, 47 ... temporary support stands.

Claims (8)

A method of assembling and manufacturing a Goliath crane arranged across a pool for storing water,
A loading step of loading the strength member constituting the Goliath crane on a trolley, moving the trolley into the pool, and loading the strength member;
An ascending step of moving the strength member upward by raising the water level of the pool and raising the carriage.
An attachment step of attaching the strength member moved upward to another strength member. A method for manufacturing a Goliath crane, comprising: The Goliath crane has a pair of legs respectively disposed on the quay on both sides of the pool, and a girder spanned over the pair of legs.
A leg preparing step for preparing the leg on the quay;
The carrying-in step of loading the girder, which is the strength member, on the carriage, moving the carriage into the pool, and loading the girder;
The raising step of moving the girder upward by raising the water level of the pool and raising the carriage.
A movement process in the pool that moves the carriage in the pool and moves the girder to approach the leg that is the other strength member;
The Goliath crane manufacturing method according to claim 1, further comprising: an attaching step of attaching the girder to the leg portion. The carrying-in process of carrying in the girder in a state of being divided into a plurality of;
3. A Goliath crane manufacturing method according to claim 2, further comprising: a girder assembling step of lifting up the girder part using an existing crane and connecting and assembling the girder on the carriage. The leg portion is prepared in a state of being divided into upper and lower portions, and a traveling device provided at a lower end portion of the leg portion is disposed on the track of the quay, and an upper portion of the leg portion is disposed on the track. The leg preparation step to be arranged at a position adjacent to
The attachment step of attaching to the girder on the upper part of the leg,
The ascending step of placing the upper part of the leg and the girder on the carriage, raising the water level of the pool, and moving the upper part of the leg and the girder upward;
A temporary receiving step of temporarily receiving a part on the upper side of the leg portion in a state where the girder is assembled on the temporary receiving stand placed on the quay;
The Goliath according to claim 3, further comprising: a leg joining step of arranging and joining a portion on an upper side of the leg to which the girder is assembled on a lower end of the leg. Crane manufacturing method. A support height adjustment step of lowering the water level of the pool, lowering the carriage, and placing a spacer for height adjustment on a support stand of the carriage,
The girder in which the upper part of the leg is assembled is mounted on the carriage on which the spacer is mounted, the water level is raised, and the upper part of the girder and the leg is moved upward. The method of manufacturing a Goliath crane according to claim 3 or 4, further comprising: the ascending step to be moved. A method of disassembling a Goliath crane arranged across a pool for storing water,
The Goliath crane has a pair of legs respectively installed on the quay on both sides of the pool, and a girder bridged over the pair of legs.
A girder supporting step of supporting the girder using a carriage that is movable in the pool;
In a state where the girder is supported, a leg part dividing step of cutting the leg part and dividing the leg part vertically;
A movement step in the pool in which the carriage is moved in the pool, and the upper side of the girder and the leg is moved;
A lowering step of lowering the water level of the pool, lowering the carriage and lowering the girder;
A dismantling step of disassembling the girder and the upper part of the leg on the quay, and disassembling the Goliath crane. The in-pool moving step of moving the carriage in the pool and moving the girder and the upper part of the leg toward the temporary support frame provided on the quay;
Temporary receiving process of temporarily receiving the upper part of the leg portion with the temporary receiving frame;
The girder support for supporting the girder connected to the upper side portion of the leg portion in a state of being placed on the temporary support frame by lowering the support height for supporting the girder in the carriage. And a step of disassembling the Goliath crane according to claim 6. A rotation step of rotating the carriage supporting the upper part of the girder and the leg in the pool to change the direction of the girder;
The method for disassembling a Goliath crane according to claim 6 or 7, further comprising a lifting step of lifting an upper side of the girder and the leg using an existing crane and moving it on the quay.

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