JPH0358404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for installing a gate body in a water gate installed in an estuary weir or the like.

[Conventional technology]

Various methods have been proposed for attaching gate bodies to water gates installed at river mouth weirs, etc.

For example, the construction method described in Japanese Patent Publication No. 51-4342 involves floating the door body on water and towing it to the site using a tugboat. At the site, the lower main rollers installed on both sides of the door body are pushed out and inserted into the door groove of the pier. After fitting it,
While filling the door body with water and submerging the door, lift the upper part of the door with a rope to make the door stand up, then push out the upper main roller and fit it into the door groove, remove the water that filled the door body, and lift the upper pulley. Complete the installation by attaching blocks and hanging ropes.

In addition, the construction method described in Japanese Patent Publication No. 52-12493 involves placing the door body horizontally on a barge, towing it to the site using a tugboat, and operating it using a hoist installed in advance on the pier at the site. A pulley block suspended by a wire rope is fixed to the door body, and the wire rope lifts the door body and raises the door body. When the door body is in its normal position, it is moved to a temporary structure. After supporting the door body with a stand, attaching the necessary accessories to the door body, and making the door operable with a wire rope, remove the stand.

Furthermore, the construction method described in Japanese Patent Publication No. 57-55847 involves installing support equipment on a barge with a ballast tank that can freely adjust its water intake, and using this support equipment to support the door body in its upright position, that is, in its normal installation position. Then, this barge was towed by a tugboat and placed between the piers at the site, and the pulley block at the lower end of the wire rope suspended from the opening/closing device installed on the pier was connected to the upper end of the door body, and various other attached parts were attached. Attach to the door body, lift the door body, and move the barge.

In the case of each of the above-mentioned conventional construction methods, since the door body is assembled in a factory, a door body with good assembly accuracy can be obtained. Less land is required near the site for installation. It has the advantage of not requiring a floating crane and requires only a short period of time to block ship traffic, but it has the following problems.

[Problem that the invention seeks to solve]

Since the construction method described in Japanese Patent Publication No. 51-4342 allows the door body to float on water, it is necessary to make the entire door body watertight and consider stability when floating in water. However, there are problems such as the need for a valve mechanism for drainage, which requires time and effort to manufacture the door body.

In the invention disclosed in Japanese Patent Publication No. 52-12493, when a part of the door mounted on a barge is lifted by a pulley block, slipping occurs at the contact area between the door and the barge, causing the barge to move and oscillate. As a result, the door body also swings, making it extremely unstable, which is dangerous and may damage the door body and the like. It also states that it is good to place a guide such as a roller on the barge, but it seems that even if a guide is installed, it will not be possible to prevent the barge from swinging.

The construction method described in Japanese Patent Publication No. 57-55847 involves placing the door body upright on a barge, which requires support equipment to be provided on the barge. Additionally, since the door body is upright, the center of gravity is high and unstable. moreover,
Due to the increased overall height, when passing under obstacles such as bridges using a barge with adjustable water intake, it is necessary to perform labor-intensive work such as pouring water into the barge's ballast tank to lower the freeboard. An expensive barge is also required.

In order to solve the problems of the conventional construction method as described above, this invention provides a technology to provide a method of lifting a door body placed almost horizontally on a barge to its normal state without shaking the barge. This is a major issue.

[Means for solving problems]

The technical measures taken to solve the above problems were to place the door body almost horizontally on a barge, tow it between piers at the planned installation site, raise the door body, and lift it up. In the installation method, the main roller shaft at the bottom of the door body is pulled out into the door groove provided on the pier, a temporary guide roller is fitted to this shaft, and multiple upper pulley blocks for door movement are installed on both sides of the upper end of the door body. A wire rope with both ends fixed to the drum is connected to the pulley, the plurality of pulleys of the lower pulley block dedicated for installation provided on both sides of the lower part of the door body, and the plurality of pulleys provided on the side of the drum of the hoisting machine. , so that the number of rope connections between each pulley on the side of the drum and each pulley on the lower pulley block of the door body is greater than the number of rope connections between each pulley on the side of the drum and each pulley on the upper pulley block of the door body. At the same time, a part of the rope that spans the upper and lower pulley blocks of the door body is temporarily fixed to an appropriate stationary part on one of the pulleys on the side of the drum, and then the rope is hung by the drum of the hoisting machine. By hoisting up, the upper and lower sides of the door body are lifted simultaneously, and the hoisting speed on the upper side of the door body is increased to raise the door body as it rises. The lower pulley block is removed, the upper main roller shaft is pulled out into the door groove, the upper main roller is installed, and the wire rope is used for its original door movement function.

[Effect]

Since the construction method of this invention is as described above, the door body is towed between the piers and the rope is hung as described above, and when the rope is hoisted by the drum of the hoist, the top and bottom of the door body are pulled up at the same time. Leave the barge without sliding on the barge. In addition, the rising speed of the upper part of the door body, which has fewer ropes, is faster than the rising speed of the lower part, so the door body rises as it rises. Then, the rope between the pulley blocks at the bottom of the door body loosens.

In this state, replace the guide roller of the lower main roller shaft with the original main roller, pull out the upper main roller shaft into the door groove and install the main roller, remove the pulley block at the bottom of the door body, and connect the rope to the normal position. Complete the installation by replacing the unit with the current state.

〔Example〕

Next, an embodiment of this invention construction method will be described based on the attached drawings.

In the figure, reference numeral 1 denotes a door body, which is of a known structure and manufactured in advance at a factory.

This door body 1 is placed almost horizontally on a support base 4 on a barge 3 with its skin plate 2 facing upward, and is towed by a tugboat (not shown) to the planned installation site.

It is preferable to use the above-mentioned barge 3 that can adjust the loading height and stuttering, so that it can cope with obstacles on the transportation route to the installation site.
It does not necessarily have to be this way.

A pier 5 is constructed in advance from concrete at the planned installation site, a door groove 6 is also formed on both piers, and a hoist 8 is installed on each of the weir pillars 7 provided on both piers 5. 9 is the drum.

Main roller shafts 10 are mounted on both side walls of the door body 1 at the upper and lower parts when the door body 1 is installed in its normal position.
11 is provided, and these main roller shafts 10, 11
are attached to the shaft mounting portions on both side walls of the door body 1 so as to be able to move forward and backward, and until the door body 1 is inserted between the piers 5, these main roller shafts 10 and 11 are retracted into the door body 1 and fixed. and remove the main rollers attached to each shaft.

In addition, pulley blocks 12 are fixed to both sides of the upper end (right end in FIG. 1) of the door body 1, and pulley blocks 15 are fixed to both sides of the lower part of the skin plate 2 of the door body 1, which are used only during installation. However, these pulley blocks 12 and 15 are fixed at the factory.

Further, the pulley block 12 is provided with a plurality of pulleys 16 (two in the example of FIG. 4), and the pulley block 15 is provided with twice the number of pulleys 17 (four in FIG. 4) as the pulleys 16. On the side of the drum 9 of the hoisting machine 8, pulleys 18, the number of which is one more than the pulleys 17 (five in FIG. 4), are provided.

The pulleys 16, 17, and 18 are configured to rotate independently, but when winding the wire rope, which will be described later, only the pulley for fixing the wire rope can be fixed so as not to rotate only during installation. It's like this.

As shown in FIG. 1, the main roller shaft 11 at the bottom of the door body 1 transported by the barge 3
The barge 3 is stopped when aligned with the center of the barge 3, and only the lower main roller shaft 11 is pulled out into the door groove 6 and fixed.
A guide roller 21 exclusively for installation, which has the same diameter as the original main roller but is made very compact, is fitted into the main roller shaft 11 within the door groove 6.

Next, as shown in FIG. 4, the wire rope 23 with one end 22 fixed to the drum 9 is guided downward and placed on the left pulley 16, then guided upward and placed on the left end pulley 18, and then guided downward and placed on the right side. Then, it is guided upward and passed over the second detented pulley 18 from the left, and a part of it is fixed to the pulley 18 as the fixing part 24, and then,
After winding the rope 23 between a plurality of lower pulleys 17 (four in the figure) and a plurality of upper pulleys 18 (three in the figure), the other end 25 of the rope 23 is tied to a part of the outer periphery of the drum 9. Fixed to.

As described above, after winding the wire rope 23 around both sides of the door body 1 and each drum 9, each drum 9 is rotated in the direction of the arrow in FIGS. 1 and 4 to wind up the wire 23. The front and rear of the door body 1 are lifted at the same time at the start of the lifting process, and are separated from the barge 3, but after that, the number of ropes 23 used to lift the upper part of the door body 1 is 4, and the lower part of the door body 1 is lifted up. Since there are eight ropes 23 and the winding speeds at both ends of the ropes 23 are equal, the upper part of the door body 1 is pulled up at twice the speed of the rear part of the door body 1.

Therefore, the door body 1 rises while rising upward around the lower main roller shaft 11, and the door body 1 becomes completely upright and assumes a normal posture. After that, the door body 1 is hoisted up between the pulley 18 on the drum 9 side and the pulley block 12 on the upper part of the door body, and on the other hand, as shown in FIG.
The rope 23 between the 5 parts is loosened.

In this state, the door body 1 has risen above the upper end of the door groove 6, and the guide roller 21 has come out directly above the door groove 6. At this time, since the roller shafts 10 are also positioned directly above the door groove 6, the main roller shafts 10 are made to protrude from the upper wall of the door body 1, and the main rollers 10 are
7 and replace the guide roller 21 attached to the lower main roller shaft 11 with the original main roller 28,
Attach accessories such as watertight rubber.

In addition, the door body is maintained in an upright state using, for example, a normal lifting suspension device (not shown), and the wire rope is fixed to the pulley, and the pulley is released from the fixation so that it can rotate, and the pulley block 15 is also removed. After rehanging the rope 23 to its normal state, the door body 1 is gradually lowered by operating the hoist 8, and the upper and lower main rollers 27 and 28 are fitted into the door groove 6 to complete the installation.

In the above embodiment, a wire rope was hung around a pulley that could not be rotated only during installation, and the wire rope was fixed in the middle. Of course, the parts may be fixed.

〔effect〕

As described above, this invention reduces the number of ropes to be hung on the upper pulley block side of the door mounted almost horizontally on the barge than the number of ropes to be hung on the lower pulley block, so that when the rope is hoisted by the hoisting machine, The door body starts to rise from the barge at the same time, and the rising speed of the upper part of the door body becomes faster, so the door body stands up as it rises, and the guide roller attached to the main roller shaft at the bottom of the door body moves upward. By rising in the groove, the position of the door between the piers 5 is correctly regulated and rises smoothly until it becomes vertical. Therefore, when the door body is separated from the barge, there is no fear that the door body or barge will sway due to the movement of the load applied from the door body to the barge or reaction force, and the door body can be suspended at four points on the top, bottom, left, and right. Because of this, there is no vertical, horizontal, or vertical balance swinging when lifting, and the stability of the door body is extremely good.
Therefore, there is no fear that the guide roller will come off the door groove when the door body is raised, so the lifting operation can be carried out safely.

As described above, in this invention, the barge does not shake when the door body is lifted, so the work can be continued even when the depth between the bottom of the ship and the water bottom is small, for example, at low tide.

In addition, the lifting and standing operations of the door body as described above can be performed using a normal door hoisting machine, and no other power is required. Since the main roller is compact and lightweight, and the main roller is replaced with the original one after the door assumes its normal position, there is no risk of the main roller being damaged when the door is pulled up.

Furthermore, since the wire rope used for installing the door body is used as it is for the original door operation, there is an advantage that there is no need to prepare a separate wire rope.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the installation method of the present invention, Fig. 2 is a front view of the same as above, Fig. 3 is a side view of the door body in a suspended state, and Fig. 4 is a perspective view of the door body in a rope hanging state. It is. 1... Door body, 3... Barge, 5... Pier, 6...
... Door groove, 9 ... Drum, 10, 11 ... Main roller shaft, 12 ... Upper pulley block, 15 ... Lower pulley block, 16, 17, 18 ... Pulley, 21 ...
...Guide roller, 23...Wire rope, 24...
...Fixed part, 27, 28...Main roller.

Claims (1)

[Claims] 1 In this construction method, the door body is placed almost horizontally on a barge, towed between piers at the planned installation site, and then lifted and installed while raising the door body.The main roller shaft at the bottom of the door body is installed on the pier. Pull it out into the door groove and fit a temporary guide roller on this shaft, and connect the multiple pulleys of the upper pulley block for door movement provided on both sides of the upper end of the door body, and the lower part dedicated for installation provided on both sides of the lower part of the door body. A wire rope, both ends of which are fixed to the drum, is connected to each pulley on the side of the drum. The number of ropes to be hung between the other pulleys on the side of the drum and each pulley on the lower pulley block of the door body is greater than the number of ropes to be hung between each pulley on the upper pulley block of the door body, and A part of the rope that spans the upper and lower pulley blocks of the door body is temporarily fixed to an appropriate stationary part on one of the pulleys, and then the rope is hoisted by the drum of the hoisting machine to open the door. Lift the upper and lower parts of the body at the same time, increase the hoisting speed of the upper part of the door body, raise the door body as it rises, and after raising the body, replace the lower guide roller with the original main roller and lower the lower pulley block. Remove the upper main roller, pull out the upper main roller shaft into the door groove, and install the upper main roller.
A water gate installation method characterized by replacing the wire rope with the original door movement function.