JPH0645977B2 - Lift up or down construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lift-up or down method of raising and lowering an object by using a balance weight member, and particularly in a width direction such as a top tower. The present invention relates to a lift-up or down method suitable for lifting an object having an extremely large length in the vertical direction onto a high-rise building or lowering it at the time of dismantling.

<Prior art> Conventionally, in the construction of a tower on the top of a radio tower, an observation tower, etc., the members that make up the tower are lifted one by one with a crane, winch, etc., and each member is assembled and fixed at the top. Alternatively, a construction method has been adopted in which a top steel tower preassembled on the ground is lifted to the top by a tower crane, and only the fixing work is performed at the top.

However, when the radio tower and the observation tower are high-rise, the former construction method poses a risk of assembling and fixing work at the top, and the latter construction method makes it extremely difficult or impossible to use the tower crane.

Therefore, a method applying the so-called lift-up method proposed in Japanese Utility Model Publication No. 59-11557 was devised.

That is, for example, as shown in FIG. 2 (A), a plurality of jacks 2 are set on the top of the construct 1 and the jacks 2
A pedestal 3 is arranged on the top so as to be vertically movable via a jack 2. On the other hand, a suspending jig 5 is temporarily installed on the upper edge of the top tower 4 which is attached and fixed to the top of the building 1. Then, first, the suspending material 6 is vertically inserted into the suspending jig 5 and the pedestal 3, and the lower surface of the suspending jig 5 and the suspending material 6 are fixed to each other by a locking member such as a fixing nut. The upper surface and the suspension member 6 are fixed to each other.

In such a state, the pedestal 3 and the suspending member 6 are integrally jacked up, and the top of the building 1 and the suspending member 6 are fixed by a locking member such as a fixing nut to prevent the suspending member 6 from descending. At the same time, the upper surface of the pedestal 3 and the suspension member 6 are removed from the jack 2
To lower.

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

After that, the top of the building 1 and the suspending member 6 are fixed by a stop member, and as shown in FIG. 2 (B), a connecting portion 4'to the building 1 provided on the lower end edge of the top tower 4 is provided. The suspending member 6'is vertically inserted into the frame 3, and the lower surface of the connecting portion 4'and the suspending member 6'are fixed by locking members, and the upper surface of the frame 3 and the suspending member 6'are fixed respectively. . Then, the top of the structure 1 and the hanger 6
Is removed, and the hanging material 6 and the hanging jig 5 at the upper edge of the top tower 4 are removed.

In such a state, the jack 2 is repeatedly moved up and down in the same manner as above, and the lower end of the top tower 4 is raised to reach the top of the building 1, and the top tower 4 is attached to the building 1 at its connecting portion 4 '. Fix it.

<Problems to be Solved by the Invention> By the way, the top tower 4 has a length in the vertical direction (hereinafter referred to as an aspect ratio) that is generally very large as compared with the horizontal direction, and the center of gravity is 1 / l of the length in the vertical direction. Often below 2.

In such a case, since the upper end of the top tower 4 is raised to the top of the structure 1 in the ascending operation, the upper edge of the top tower 4 is used as the hanging point 13, so the center of gravity is located below the hanging point 13 and the aspect ratio is extremely high. Even the large top tower 4 can be stably raised. In addition, even if the top tower 4 swings to some extent during this raising operation for some reason, the structure 1
Since the top tower 4 is supported by and the swinging is stopped, there is a possibility that an accident such as damage to the jack 2, the pedestal 3, the suspension jig 5, the suspension material 6 or a drop of the top tower 4 due to these damages will occur. Few.

However, since the center of gravity is located above the suspension point 13 in the ascending operation after the suspension point 13 is moved to the lower end edge of the top tower 4, it is extremely unsatisfactory in the case of the top tower 4 having an extremely large aspect ratio. Be stable.

Furthermore, above the building 1, above this unstable top tower 4
There is nothing to support, and once the top tower 4 shakes even a little, this shake increases without being suppressed, and finally the jack 2, the mount 3, the connecting portion 4 ', There is a risk that the suspension member 6'is damaged, or the top tower 4 falls or falls.

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

Further, a method of temporarily installing a guide pillar at the standing position of the top steel tower 4 above the structure 1 and supporting the top steel tower 4 by this guide pillar to suppress the shake and prevent a fall or a fall accident is also considered.

However, if the structure 1 is a high-rise building, it is difficult to raise / temporarily install / remove the guide pillars, and the cost increases, which is not a practical method.

The present invention has been made in view of the above points, and an object thereof is to ascend to a structure and to descend an object from the structure, particularly, a top part of a high-rise structure such as a radio tower or an observation tower. It is necessary to safely and cumbersomely raise an object with a very large aspect ratio, such as a top tower, or descend the above-mentioned object already installed at the top of the high-rise building to the ground. It is to provide a practical construction method that can be performed at low cost.

<Means for Solving the Problems> The present invention is a lift-up or down construction method that uses a jack and a suspending member that connects the jack and an object for the above object, and an object from a required position to a top of the structure. 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. It is achieved by a lift-up or down method characterized by being performed by

Further, it is preferable that a balance weight member composed of the balance weight member and the balance weight member storage container is used, and the balance weight member is attached below the object by a temporary column.

Further, a balance weight member composed of a balance weight body and a flexible container for accommodating the balance weight body is used, and when the target object is raised, the storage container is previously attached and placed under the target object. A balance weight body is housed in the storage container when the target object rises to a required position of the structure, and the balance weight body is mounted in the storage container attached to the lower part of the target object when the target object is lowered. Alternatively, the balance weight body may be pulled out from the target object by starting to descend after housing.

<Operation> In the present invention, the raising of an object to the top of a structure, particularly a high-rise structure, or the lowering of an object from the top is referred to by using a jack and a suspending member connecting the jack and the object. Lift up or down construction method.

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

That is, during the ascent of the object, the hanging point of the hanging material is placed at the lower end of the object. If the object is raised as it is, the center of gravity of the object is above the suspension point, and there is a risk of falling as described above. Therefore, in the present invention, a balance weight member is attached below the object by, for example, a temporary column,
The center of gravity is moved below the hanging point, and the work of lifting up the object with the jack and the hanging material is stably performed.

Further, the lowering of the object during the above period is performed by placing a suspension point on the lower end of the object and attaching the above-mentioned balance weight member below the object. By doing so, the center of gravity is located below the hanging point, so that the lift down of the object applied to the jack and the hanging material is stabilized.

By the way, the required position of the above structure is a position where the object cannot be lifted up or down with the upper end of the object as a suspension point, or a position where a space for attaching a balance weight member can be secured below the object. Is.

As described in the above-mentioned prior art, the former position is a position where the upper end of the top tower and the top of the structure are substantially coincident with each other when the object is, for example, a top tower having an extremely large aspect ratio.

That is, when the top tower is lifted to the top of the structure, the upper end is lifted up to the above position as in the conventional manner, and the hanging point is moved upward from this position by the construction method according to the present invention. Then, the balance weight member is attached below the top tower and lifted.

When descending the existing top steel tower from the top of the structure to the ground, the descending from the start of descent to the top of the structure from the upper end of the top steel tower is performed by the construction method according to the present invention.

When a balance weight member and a flexible container that stores the balance weight member, such as a bag, is used as the balance weight member, the bag is attached to the lower part of the object in advance when the object is raised. The balance weight body is housed in the bag when the object is raised to the required position. When lowering the object, a bag accommodating the balance weight body may be attached to the lower portion to start the descent, and the balance weight body may be pulled out from the bag at the point where the bag is lowered to the required position.

<Example> FIGS. 1 (A) to 1 (D) show a first example of the construction method according to the present invention, and show, for each step, a mode in which the top tower is lifted to the top of the high-rise building.

First, in the step of FIG. 1 (A), it is possible to move up and down through the jacks 2 on a plurality of jacks 2 set on the top of a high-rise building (hereinafter, building) 1 in the same manner as the above-mentioned conventional technique. The pedestal 3 is arranged, and the hung material 6 is vertically inserted through the pedestal 3 and the hanging jig 5 temporarily provided at the upper end edge of the top steel tower 4, and the pedestal 3 and the hanging material 6 are locked by a locking member such as a fixing nut. ,
The hanging material 6 and the hanging jig 5 are fixed, respectively. In this state, the jack 2 is vertically moved and the locking member is tightened and loosened in the same manner as in the above-described conventional technique, and the top tower 4 is moved to the required position of the structure 1, in this example, as shown in FIG. 1 (B), Below the top tower 4, the balance weight member 10 is moved up to a position where a space can be secured in which the member 10 can be attached.

Then, in the step of FIG. 1 (B), the top tower 4
A temporary beam 11 is attached to the bottom of the temporary beam member 11 at an attachment portion 4'provided at the lower end of the top tower 4, and a balance weight member 10 is attached below the temporary beam member 11 via a temporary column 12.
Next, the suspending member 6'is vertically inserted through the temporary beam 11 and the pedestal 3, and the lower surface of the temporary beam 11 and the suspending member 6'are fixed by a locking member, which is used in the step of FIG. 1 (A). The hanging jig 5 and the hanging material 6 are removed.

By the way, as the balance weight member 10, water,
A container for accommodating sand or other suitable balance weight body, for example, a water tank is attached, water is injected by a hose, and the amount of water injection is adjusted so that the center of gravity of the whole is located below the hanging point 13.

It should be noted that the balance weight member 10 may be one in which the above balance weight body is stored in a storage container in advance, or a rock having an appropriate weight,
You may use scrap materials.

In this state, as in the step of FIG. 1 (A), the jack 2 is moved up and down and the locking member is tightened, and the top tower 4 is raised to the top of the structure as shown in FIG. 1 (C). Let

In the step of FIG. 1 (C), the connecting portion 4 ′ of the top tower 4 and the structure 1 are joined together to form the structure 1 of the top tower 4.
Fixed to.

Then, 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 disassembled on the ground.

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

Further, in order to lift down to the ground for replacing or removing the top tower 4 which is already installed in the structure 1, the above reverse steps may be performed.

That is, first, in the step of FIG. 1 (D), the temporary beam 11, the temporary column 12, and the empty tank 10 are assembled on the ground and jacked up to the top of the building 1, and the top tower 4
It is attached to the connecting portion 4'of, and water is poured into the tank 10. Next, in the step of FIG. 1 (C), the top tower 4 is jacked down with the water tank 10 attached to the lower part.
Then, the temporary beam 11, the temporary column 12, and the water tank 10 are removed in the step of FIG. 1 (B), and the top tower 4 is lowered to the ground in the step of FIG. 1 (A).

In the embodiment, the jack 2 is used to move the suspension members 6, 6'up and down.
Although the case of using the gantry 3 that can be moved up and down via the above is not limited to this, the function of holding the suspension members 6, 6'on the jack 2 itself without using the gantry 3. You may use the center hole jack which has.

<Effects of the Invention> As described in detail above, according to the lift-up or down method according to the present invention, even if an object with an extremely large aspect ratio, such as a top tower, has an object at the top of the high-rise building, It can be safely raised without causing a dangerous accident such as a fall or a fall.

In addition, the conventional guide pillars are not required, and there is no need to raise these pillars to the top of the structure or temporary installation / removal work, and the object can be lifted to the top of the structure with only one ascending step.

Further, it is sufficient that the balance weight member is composed of an inexpensive balance weight body such as water or sand and an inexpensive container that can simply store it, or an inexpensive material such as waste material. Can be used repeatedly, and the construction cost for lifting up or down is greatly reduced.

If water, sand, gravel, other liquids or granular materials are used as the balance weight body, the center of gravity can be easily positioned by adjusting the injection amount of these members.
Moreover, since the injection and extraction of these liquids and granules can be easily performed during the ascent and descent of the object,
The object can be raised or lowered without causing an extra weight increase.

[Brief description of drawings]

FIGS. 1 (A) to (D) are explanatory views showing, step by step, a first embodiment of a lift-up or down method according to the present invention,
2 (A) and 2 (B) are explanatory views showing a conventional lift-up or down method. 1 ... Construct, 2 ... Jack 3 ... Stand, 4 ... Object 4 '... Connection part, 5 ... Suspension jig 6,6' ... Suspension material 10 ... Balance weight member 11 ... … Temporary beams, 12… Temporary columns 13… Hanging points

Claims (2)

[Claims] 1. In a lift-up or down construction method using a jack and a suspending member connecting the jack and an object, the object is lifted or lowered from a required position to the top of the structure, and a lower end of the object is used. Part as the hanging point of the hanging material,
Further, a lift-up or down construction method, characterized in that a balance weight member is attached below the object so that the center of gravity is located below the suspension point of the object. 2. The lift-up according to claim 1, wherein a balance weight member composed of the balance weight member and the balance weight member storage container is used, and the balance weight member is attached below an object by a temporary column. Down construction method.