JPH04363464A - Method for hoisting vertical unit pipe - Google Patents

Abstract

PURPOSE:To enhance the safety and efficiency of work by hoisting a vertical unit pipe using a first crane near the uppermost portion thereof and a second crane via a pulley at the lowermost portion and its adjacent portion, and disconnecting the wire of the second crane when the unit pipe becomes almost vertical. CONSTITUTION:A wire 35 is hung to an uppermost floor frame 23a for piping and the floor frame 23a is hoisted by a first crane 37. A wire 40 is hung to a floor frame 23b adjacent a lowermost floor frame 23c for piping and the floor frame 23b is hoisted by a second crane 41 via a pulley 39. When a vertical unit pipe 20 becomes almost vertical the wire 40 is disconnected and then the unit pipe 20 is hoisted only by the first crane 37. Deformation of the center portion of the unit pipe 20 is thereby prevented and the work can be safely and efficiently carried out.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a method for lifting vertical unit pipes installed in high-rise buildings, and in particular to a method for lifting vertical unit pipes assembled from thin pipes, weak pipes such as copper pipes, etc. .

0002

[Prior Art] In recent years, when constructing high-rise buildings such as condominiums and office buildings, shortening the construction period has led to lower construction costs, and in order to facilitate construction management, units related to materials and equipment have been is progressing. One of the steps to unitization is to prepare vertical pipes such as air conditioning pipes, water pipes, drainage pipes, etc. in lengths corresponding to 2 to 4 floors, insert and fix these pipes into the piping floor frame,
There is a vertical unit pipe that is made into a unit so that piping can be installed at the same time as the slab is formed. Such vertical unit pipes are used in the construction of many high-rise buildings.

[0003] Conventional vertical unit pipes, as shown in Fig. 2, are made by inserting various types of pipes 2, each having a length equivalent to 3 to 4 floors of a building to be constructed, through piping floor frames 3a, 3b, and 3c. However, each floor frame 3a, 3b, 3c for piping is arranged at the same interval as the height of each floor. The various pipes 2 and piping floor frames 3a, 3b, 3c are constructed by, for example, attaching the piping floor frames 3a, 3b, 3c to a rectangular frame 4 and attaching an upper plate 5 to the upper plate 5. A sleeve 6 is erected around the periphery of the hole, and placed on a beam on the outer surface of the long side of the frame 4.
It is constructed by attaching a horizontal member 7 to be fixed, and the pipe 2 is inserted through the sleeve 6, and the pipe 2 is inserted into the sleeve 6.
The sleeve 6 is integrally assembled by bolting a two-split fixing band attached to the sleeve 6 to the sleeve 6.

The vertical unit pipe having the above structure is assembled on the ground, and a hanging wire 12 is attached to a hanging hook 11 provided on the uppermost piping floor frame 3a (the piping floor frame located at the uppermost position when lifted). After hanging and lifting it to a predetermined position with a crane, and placing and fixing the horizontal member 7 on the beam, connect the upper end of the lower section unit pipe that has already been assembled to the building and the lower end of the lifted unit pipe to construct the building. It is assembled into things.

[0005]

[Problems to be Solved by the Invention] Next, a conventional lifting method for assembling a vertical unit pipe into a high-rise building will be described with reference to FIG. When the vertical unit pipes are assembled on the ground, the piping floor frames 3a, 3b, 3c are in contact with the ground, and the various pipes 2 are in contact with the piping floor frames 3a, 3b.
, 3c, and is installed in a horizontal state. In this horizontal state, the hanging wire 12 is attached to the hanging hook 11.
When hung and lifted, the bottom piping floor frame 3c (
When lifted, the rear end 14 of the pipe 2 on the lowermost (piping floor frame) side comes into contact with the ground and receives the load of the vertical unit pipe. That is, when the vertical unit pipe 1 is lifted by only one end, it gradually becomes vertical while dragging the rear end, and the rear end contacts the ground to support the load until the entire unit leaves the ground.

If the hanging wire 12 is hung only on the hanging hook 11 provided on the uppermost piping floor frame 3a in this manner, the rear end of the pipe 2 will be dragged and may be damaged or damaged. It could get damaged. Therefore, a method is adopted in which the piping floor frames 3a and 3c are simultaneously lifted to a predetermined height, and then the piping floor frame 3a side is further lifted. That is, as shown in FIG.
At the same time, the lowermost pipe floor frame 3c is hung with the lifting wire 17 and lifted by the second crane 18.
After lifting the pipe 2 to a height where the rear end 14 does not touch the ground, the pipe floor frame 3 is subsequently lifted by the first crane 16.
When only the a side is lifted and it is almost vertical, remove the lifting wire 17 of the second crane 18 and
This is a method of lifting using only the crane 16.

[0007] With this lifting method, damage to the pipe 2 can be prevented because it does not drag on the ground, but the center part of the pipe 2 may curve as shown by the dotted line due to its own weight or the weight of the piping floor frame. However, there was a problem that it would eventually collapse or bend. In particular, the diameter is 65m.
Large deformations occur in soft pipes such as thin tubes, copper tubes, and ducts with a diameter of less than m. To prevent these deformations, it is best to lift the center part at the same time, but in a narrow site it is not possible to place additional cranes, and it is difficult to lift the object in a well-balanced manner while communicating with three or more cranes. be.

The present invention has been made in view of the current situation, and provides a method for lifting a vertical unit pipe that can be lifted in a well-balanced manner to prevent deformation of the central portion, and that can perform efficient and safe lifting work. With the goal.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration. That is, the suspension wire hung on the topmost piping floor frame is lifted by the first crane, the suspension wire with both ends hung on the bottom piping floor frame and the adjacent piping floor frame is passed through the pulley, and the above-mentioned Lifting the pulley with a second crane at the same time as the first crane is lifting it, and subsequently, after the first crane has lifted the pulley into a nearly vertical state, the lifting wire of the second crane is removed and the pulley is further lifted to a predetermined height position. It is characterized by

0010

[Operation] Since the lowermost piping floor frame and the adjacent piping floor frame are lifted at the same time, the central part of the vertical unit pipe is prevented from being bent and deformed during lifting. In addition, as the vertical unit pipe is lifted up and becomes vertical, the suspension wire moves due to the rotation of the pulley, so the suspension wire does not loosen and is connected to the bottom piping floor frame and the adjacent piping floor frame. Works to maintain load balance.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on the embodiment shown in FIG. 20 is a vertical unit pipe formed by assembling various pipes 21 and piping floor frames 23a, 23b, and 23c, and is installed horizontally on the ground. A hanging hook 27 is attached to the uppermost piping floor frame 23a, and hanging hooks 31 and 3 are attached to the lowermost piping floor frame 23c and the adjacent piping floor frame 23b, respectively.
3 is installed. It is preferable that the hanging hooks 31 and 33 are installed above the pipe 21 when installed on the ground. Incidentally, the other configuration of the vertical unit pipe 20 is the same as the conventional one, so the explanation thereof will be omitted.

To lift the vertical unit pipe 20 configured as described above, the hanging wire 35 is hung on the hook 27 and lifted by the first crane 37, and at the same time, one end of the hanging wire 40 passed through the pulley 39 is hung on the hanging hook 31. , the other end is hung on a hanging hook 33, and the pulley 39 is lifted up by a second crane 41. Piping floor frame 2
A hanging wire 35 is attached to each of 3a, 23b and 23c.
, 40 are hung, so the vertical unit pipe 20
The whole can be lifted at the same time in a well-balanced manner. After the pipe 21 is lifted to a height where the rear end 43 does not touch the ground, the pipe floor frame 23a, which is the uppermost part, is lifted.
When the side is lifted by the first crane 37, the vertical unit pipe 20 gradually becomes vertical. At this time, the suspension wire 40 moves due to the rotation of the pulley 39, and the lowermost part on the piping floor frame 23c side becomes longer, so the suspension wire 40 does not loosen even on the piping floor frame 23b side, and therefore the load balance is lost. Therefore, deformation of the pipe 21 can be prevented.

[0013] After the first crane 37 has hoisted the object to a substantially vertical position, the lifting wire 40 of the second crane may be removed and the first crane 37 may further hoist the object to a predetermined height. In this way, the deformation of the pipe 21 is prevented by hanging the hanging wire 40 between the lowermost piping floor frame 23c and the adjacent piping floor frame 23b, and lifting the hanging wire 40 through the pulley 39. This enables efficient and safe lifting work.

[0014]

Effects of the Invention: This invention can simultaneously lift the piping floor frames at both ends of a vertical unit pipe as well as the piping floor frames adjacent to the lowest piping floor frame, thereby preventing deformation in the center of the pipe. It can be prevented. In addition, since the hanging wires hung on the lowest piping floor frame and the adjacent piping floor frame are lifted up via pulleys, the hanging wires are prevented from loosening, and the hanging wires can be lifted without losing the balance of the load. Furthermore, since there is no need to increase the number of cranes, lifting work can be carried out efficiently and safely even at narrow sites.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a method for lifting a vertical unit pipe according to the present invention.

FIG. 2 is an explanatory perspective view showing a state in which a conventional vertical unit pipe is lifted.

FIG. 3 is an explanatory diagram of a conventional method for lifting a vertical unit pipe.

[Explanation of symbols]

20 Vertical unit pipe 21 Various pipes 23a Floor frame for piping 23b Floor frame for piping 23c Floor frame for piping 27 Hanging hook 31 Hanging hook 33 Hanging hook 35 Hanging wire 37 First crane 39 Pulley 40 Hanging wire 41　Second crane

Claims (1)

[Claims] [Claim 1] A first crane lifts the suspension wire hung on the uppermost piping floor frame, and the suspension wire with both ends hung on the lowermost piping floor frame and the adjacent piping floor frame is attached to a pulley. The pulley is lifted by a second crane at the same time as the first crane is lifted, and then, after the first crane lifts the pulley into a nearly vertical state, the second crane's lifting wire is removed, and the pulley is lifted to a predetermined height position. A method for lifting a vertical unit pipe, which is characterized by lifting it up to