JPH01190883A - Lift up or down method - Google Patents

Abstract

PURPOSE:To ensure safe work, by a method wherein an object is raised and lowered between the given position of a building and a top part, the lower part thereof forms the suspension point of a suspension material, a member for a balance weight is mounted in a level lower than the suspension point, and a center of gravity is positioned in a level lower than that of the suspension point. CONSTITUTION:A vertical movable frame 3 is situated above a plurality of jacks 2 set to the top part of a high building 1. A suspension material 6 is vertically inserted through the frame and a suspension tool 5 temporarily situated to the upper end of a top iron tower 4 to respectively secure them by means of nuts. With this state, the jack 2 is elevated and fastened and unfastened, and a space where a member 10 for a balance weight can be mounted is formed below the iron tower 4. A temporarily set beam 11 is mounted to the bottom of the iron tower 4, the member 10 for a balance weight is mounted in a position below the temporarily set beam 11 mounted to a tie-in part 4' at the lower end of the iron tower 4, a suspension material 6' is vertically inserted through the temporarily set beam 11 and the frame 3 to secure it, and the suspension tool 5 and the suspension material 6 are removed. This method enables reduction of a construction cost.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a lift-up or down construction method that uses balance weight members to raise and lower an object, particularly in the width direction such as a top steel tower. This invention relates to a lift-up or down construction method suitable for lifting an object whose length in the vertical direction is extremely large compared to that of a high-rise structure, or lowering it during demolition.

(Prior art) Conventionally, in the construction of top steel towers such as radio towers and observation towers, the members constituting the steel tower are lifted one by one to the top using a crane, winch, etc., and each member is assembled and fixed at the top, or Alternatively, a construction method was adopted in which the top steel tower was pre-assembled on the ground, lifted to the top using a tower crane, and only the fixing work was done at the top.

However, when radio towers and observation towers become high-rise, the former construction method makes assembly and certain operations at the top dangerous, and the latter construction method makes it extremely difficult or impossible to use tower cranes.

Therefore, a construction method was devised that applied the so-called lift-up construction method proposed in Japanese Utility Model Publication No. 11557/1983.

That is, for example, as shown in FIG. 2(A), a plurality of jacks 2 are set on the top of the structure 1, and the jacks 2 are
A pedestal 3 is disposed above so as to be movable up and down via a jack 2. On the other hand, a hanging jig 5 is temporarily installed on the upper edge of the top steel tower 4 which is fixed to the top of the structure 1. First, the hanging material 6 is vertically inserted into the hanging jig 5 and the pedestal 3, and the lower surface of the hanging jig 5 and the hanging material 6 are connected to each other using a locking member such as a fixing nut. The upper surface and the hanging material 6 are each fixed.

In this state, if the frame 3 and the hanging material 6 are jacked up together and the top of the structure 1 and the hanging material 6 are fixed with a locking member such as a fixing nut to prevent the hanging material 6 from descending. At the same time, remove the fixation between the top surface of the frame 3 and the hanging material 6, and remove the jack 2.
lower.

Thereafter, in response to the vertical movement of the jack 2, the locking member on the top surface of the pedestal 3 and the locking member at the top of the structure 1 are tightened or loosened, and the hanging member 6 is gradually moved upward. 4 is raised until its upper end reaches the top of construct 1.

Thereafter, the top of the structure 1 and the hanging member 6 are fixed with a stop member, and as shown in FIG. Insert the hanging material 6' into the frame 3 in the vertical direction, and attach the connecting part 4 with the locking member.
' and the hanging material 6', and the upper surface of the frame 3 and the hanging material 6'.
and fixed respectively. Next, the top of the structure 1 and the hanging material 6 are unfixed, and the hanging material 6 and the hanging jig 5 on the upper edge of the top steel tower 4 are removed.

In this state, the jack 2 is repeatedly moved up and down in the same manner as above to raise the lower end of the top steel tower 4 to the top of the structure 1, and the top steel tower 4 is attached to the structure 1 at its connecting part 4'. Fix it.

(Problem to be Solved by the Invention) By the way, the above-mentioned top steel tower 4 is generally extremely large in length in the vertical direction (hereinafter referred to as aspect ratio) compared to the horizontal direction, and the center of gravity is 1/1/1 of the length in the vertical direction. Often exists below 2.

In such a case, the lifting operation until the top of the top steel tower 4 reaches the top of the structure 1 is performed using the top edge of the top steel tower 4 as the suspension point 13, so the center of gravity is located below the suspension point 13, and the aspect ratio is extremely high. Even if the top steel tower 4 is large, it can be raised stably.

Furthermore, even if the top steel tower 4 swings a little during this ascending operation for some reason, the top steel tower 4 is supported by the structure 1 and the swing is stopped. Frame 3.
Hanging jig5. There is little possibility of accidents such as damage to the hanging members 6 or falling of the top steel tower 4 due to such damage.

However, the lifting operation after moving the suspension point 13 to the lower edge of the top steel tower 4 is extremely inconvenient in the case of the top steel tower 4, which has an extremely large aspect ratio, because the center of gravity will be located above the suspension point 13. It becomes stable.

Moreover, above the structure 1, there is this unstable top steel tower 4.
There is nothing to support the top steel tower 4, and if the top steel tower 4 sways even slightly, this sway increases without being suppressed, and eventually the jacks 2, pedestal 3, etc. This may result in damage to the connecting part 4', hanging material 6', or the top steel tower 4 may fall or fall.

Further, in the method of suppressing this vibration by controlling the amount of rise and fall of each jack 2, the operation becomes complicated.

Furthermore, a method can also be considered in which a guide column is temporarily installed at the erected position of the top steel tower 4 above the structure 1, and the guide column supports the top steel tower 4 to suppress swinging and prevent overturning and falling accidents.

However, when the structure 1 is a high-rise structure, the work to raise, temporarily install, and remove the guide pillars itself is difficult, increases costs, and is not a practical method.

The present invention has been made in view of the above points, and its purpose is to lift objects up to structures, and to lower objects from structures, particularly at the tops of high-rise structures such as radio towers and observation towers. It requires safe and complicated operations to raise an object with an extremely large aspect ratio, such as a top steel tower, or to lower an object already installed at the top of a high-rise structure to the ground. The purpose is to provide a practical construction method that can be carried out at low cost.

(Means for Solving the Problems) The present invention aims to achieve the above-mentioned object in a lift-up or down construction method that uses a jack and a hanging material that connects the jack and the object. In order to raise or lower the object, the lower end of the object is used as the hanging point of the hanging material, and a balance weight member is attached below the object so that the center of gravity is located below the hanging point of the object. This is achieved using the lift-up or down construction method, which is characterized by the fact that

Further, it is preferable to use a balance weight member consisting of a balance weight body and a balance weight body storage container, and to attach the balance weight member below the object using a temporary pillar.

Furthermore, a balance weight member consisting of a balance weight body and a flexible container for storing the balance weight body is used, and when lifting an object, the storage container is placed under the object in advance (= When the object has risen to a required position on the structure, the balance weight body is stored in the storage container, and when the object is lowered, it is placed in the storage container attached to the bottom of the object. It is also possible to store the balance weight body, start descending, and then extract the balance weight body from the object.

(Function) In the present invention, an object can be raised to the top of a structure, especially a high-rise structure, or lowered from the top by using a jack and a hanging material that connects the jack and the object. This is done using the loose restore or down construction method.

At this time, the object is raised and lowered from a desired position to the top of the structure by using a balance weight member.

That is, when the object is raised during this period, the hanging point of the hanging material is placed at the lower end of the object. If the object continues to rise in this state, the center of gravity of the object will be above the hanging point, so there is a risk of it falling over as described above. Therefore, in the present invention, a balance weight member is attached below the object using, for example, a temporary pillar,
To stably lift up an object using jacks and hanging materials by moving the center of gravity below the hanging point.

Further, the object is lowered during the above period by placing a hanging point at the lower end of the object and attaching the above-mentioned balance weight member below the object. In this way, since the center of gravity is located below the hanging point, the lift-down of the object that affects the jack and hanging material is stabilized.

By the way, the required position of the above structure is a position where lifting up or down cannot be done using the upper end of the object as a hanging point, or a position where there is enough space under the object to install a balance weight member. etc.

As explained in the above-mentioned prior art, the former position is a position where, for example, when the object is a top steel tower with an extremely large aspect ratio, the upper end of the top steel tower and the top of the structure almost coincide.

In other words, when lifting the top steel tower to the top of the structure, the upper end is used as the lifting point to raise it to the above-mentioned position as before, and from this position upwards, the lifting point is moved to the lower end using the construction method according to the present invention. Then, the balance weight member was attached to the lower part of the top steel tower and raised.

When lowering the existing top steel tower from the top of the structure to the ground, the method according to the present invention is used to lower the tower from the top end of the top steel tower to the top of the structure from the start of the descent.

In addition, when using a balance weight member consisting of a balance weight body and a flexible container, such as a bag, to store the balance weight body, when lifting the object, attach the bag to the bottom of the object in advance. , When the object is raised to the above-mentioned required position, the balance weight body is stored in the bag. When lowering the object, it is sufficient to attach a bag containing the balance weight body to the lower part, start lowering, and remove the balance weight body from the bag when it has descended to the above-mentioned required position.

(Example) Figures 1 (A) to (D) show a first example of the construction method according to the present invention, and show step by step the manner in which the top steel tower is lifted to the top of a high-rise structure. .

First, in the step of FIG. 1(A), a plurality of jacks 2 set on the top of a high-rise structure (hereinafter referred to as a structure) 1 are placed on top of the jacks 2, which can be moved up and down via the jacks 2, as in the prior art described above. Place the pedestal 3, insert the hanging material 6 vertically through the pedestal 3 and the hanging jig 5 temporarily installed on the upper edge of the top steel tower 4, and connect the pedestal 3 and the hanging material 6 with a locking member such as a fixing nut. ,
The hanging material 6 and the hanging jig 5 are each fixed. In this state, the jack 2 is moved up and down and the locking member is tightened and loosened in the same way as in the prior art described above, and the top steel tower 4 is moved to the desired position of the structure 1, as shown in FIG. 1(B) in this example. The top steel tower 4 is raised to a position where a space in which the balance weight member 10 can be attached can be secured below the top steel tower 4.

Then, in the step of FIG. 1(B), the top steel tower 4
A temporary beam 11 is attached to the bottom of the top steel tower 4 to a connecting part 4' provided at the lower end of the top steel tower 4, and a balance weight member 10 is attached below the temporary beam 11 via a temporary column 12.

Next, the hanging material 6' is vertically inserted into the temporary beam 11 and the frame 3, and the lower surface of the temporary beam 11 and the hanging material 6' are fixed with a locking member, and used in the step of FIG. 1(A). Remove the hanging jig 5 and hanging material 6.

By the way, as the balance weight member 10, water,
A container, such as a water tank, for storing sand or other suitable balance weight body is attached, and water is poured in with a hose or the like, and the amount of water injected is adjusted so that the center of gravity of the whole is located below the ink point 13.

In addition, as the balance weight member 10, it is also possible to use the above-mentioned balance weight body stored in a storage container in advance, or a rock having an appropriate weight,
Waste materials etc. may also be used.

In this state, the jack 2 is moved up and down, the locking member is tightened and loosened, and the top steel tower 4 is raised to the top of the structure, as shown in FIG. let

In the step of FIG. 1(C), the connecting part 4' of the top steel tower 4 and the structure 1 are connected, and the structure 1 of the top steel tower 4 is connected to the structure 1 of the top steel tower 4.
Fix to.

After that, in the step of FIG. 1(D), the temporary beam 1
1. The temporary pillar 12 and the balance weight member 10 are jacked down and dismantled on the ground.

In addition, when a water tank is used as the balance weight member 10, the top steel tower 4 in the step of FIG. 1(C)
When the fixation of the tank 10 and the structure 1 is completed, the water may be extracted from the tank, and the empty tank 10 may be jacked down in the step of FIG. 1(D).

Moreover, in order to lift down the top steel tower 4 already installed in the structure 1 to the ground for replacement or removal, etc., the above-mentioned steps may be reversed.

That is, first, in the step shown in FIG. 1(D), the temporary beam 11, the temporary column 12, and the empty tank 10 are assembled on the ground, jacked up to the top of the structure 1, and attached to the connecting part 4' of the top steel tower 4. , fill the tank 10 with water. Next, in the step shown in FIG. 1(C), the top steel tower 4 is jacked down with the water tank 10 attached to the lower part. Then, in the step of FIG. 1(B), the temporary beam 11. Temporary pillar 1
2. Remove the water tank 10 and lower the top steel tower 4 to the ground using the steps shown in FIG. 1(A).

In the embodiment, the lifting members 6, 6' are moved up and down by the jack 2.
Although the case has been described in which the pedestal 3 that is vertically movable via the pedestal 3 is used, the present invention is not limited to this. A center hole jack having the following may be used.

(Effects of the Invention) As detailed above, according to the lift-up or down construction method of the present invention, even if the object has an extremely large aspect ratio, such as a top steel tower, the object can be placed at the top of a high-rise structure. It can be raised safely without causing dangerous accidents such as tipping over or falling.

In addition, conventional guide columns and the like are no longer required, and there is no need for any lifting of these pillar materials to the top of the structure, or any temporary construction or removal work, and it is possible to lift the object to the top of the structure with only one lifting process.

Furthermore, the balance weight member may consist of an inexpensive balance weight body made of water, sand, etc., and an inexpensive container that can simply store it, or an inexpensive material such as scrap wood may suffice; can be used repeatedly, significantly reducing construction costs for lifting up or down.

You can also use water and sand as a body for balance weights.

If gravel, other liquids, or granules are used, the center of gravity can be easily positioned by adjusting the amount of these materials injected. In addition, these liquids and granules can be easily injected and extracted even while the object is being raised or lowered, so the object can be raised or removed without adding unnecessary weight.
Can descend.

[Brief explanation of the drawing]

FIGS. 1(A) to 1(D) are explanatory diagrams showing each step of the first embodiment of the lift-up or down construction method according to the present invention;
FIGS. 2(A) and 2(B) are explanatory diagrams showing the conventional lift-up or down construction method. 1...Construction 2...Judgement 3...
Frame 4...Object 4'...Joint part
5... Hanging jig 6.6'... Hanging material 10... Balance weight member 11... Temporary beam 12... Temporary column 13...
・Sokudo patent applicant Obayashi Co., Ltd. Representative
People Patent Attorney - Color Ken Axis
Patent Attorney Masatoshi Matsumoto 1st (A) (B) 2nd (A) (B)

Claims (2)

[Claims] (1) In the lift-up or down construction method that uses a jack and hanging materials that connect the jack and the object, the lower end of the object is lifted or lowered from the desired position to the top of the structure. A lift-up or down construction method characterized in that the lifting point is the hanging point of the hanging material, and a balance weight member is attached below the object so that the center of gravity of the object is located below the hanging point of the object. (2) The lift-up or down construction method according to claim 1, wherein a balance weight member consisting of a balance weight body and a balance weight body storage container is used, and the balance weight member is attached below the object using a temporary pillar. .