JPH07116828B2 - How to use the crane in the sliding formwork method and how to move the mast lifting crane up and down - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method of using a crane in a sliding formwork method that enables the use of a crane such as a mast lifting type light crane having a small turning radius, and a mast lifting type crane. The present invention relates to a method of moving up and down a mast lifting crane that can promote weight reduction.

<< Prior Art >> FIG. 6 is an explanatory view showing a usage state of a crane according to a conventional method. In the figure, 1 is a tower-like structure such as an ultra-high chimney or an observation tower, 2 is a ring-shaped telescopic sliding formwork,
3 is a work floor that holds the sliding formwork 2 on its back side, 4
Is a crane and 5 is a wire.

In the tower-shaped structure 1, concrete is continuously cast in the sliding form 2, and the sliding form 2 is gradually pulled up together with its working floor 3, and at that time, the form size is appropriately adjusted. It is constructed by continuously changing the cross-sectional shape in the height direction by the so-called sliding formwork method.

In the construction work of the tower-shaped structure 1 by such a sliding formwork method, the crane 4 is installed on the work floor 3 and the crane 4 is installed.
Made by. In other words, the crane 4 is
Is pierced and supported substantially at the center of the work floor 3, and the lower end side of the support column 40 is suspended by a plurality of wires 5 stretched from the peripheral portion of the back side of the work floor 3 to suspend the work floor 3.
It will be installed in the approximate center of the.

<< Problems to be Solved by the Invention >> However, if the crane 4 is installed at a substantially central portion of the work floor 3 as shown in FIG. 6, the crane will become larger as the outer diameter of the tower structure 1 increases. 4 also needs a large turning radius with a long arm 41, which causes a problem of increasing the size of the crane 4. In addition, the increase in size of the crane 4 causes a decrease in workability in a narrow space at the top of the structure 1, and also requires reinforcement of each part such as the work floor 3 to support the large weight of the crane 4, resulting in high cost. become. Further, it is not preferable from the viewpoint of safety that an excessively heavy object is located at a high place at the top of the tower-shaped structure 1, causing various inconveniences.

The present invention has been made in view of the background as described above, and a first object thereof is to provide a relatively lightweight and compact crane of a mast lifting type having a small turning radius which cannot be conventionally used in a sliding formwork method. It is to provide a method of using a crane in a sliding formwork method that can be used. A second object of the present invention is to provide a method for raising and lowering a mast lifting crane, which can promote weight reduction of the mast lifting crane.

<< Means for Solving the Problem >> In order to achieve the above first object, in the crane using method in the sliding formwork method according to claim 1 of the present invention, an annular stretchable sliding formwork is used. Sliding formwork method of constructing structures such as tower-like structures by continuously pouring concrete inside and gradually raising the sliding formwork along with its working floor and adjusting the frame diameter at that time In the above, a crane was installed on the work floor with a jack so that it could be slid horizontally and slidably, and the crane was moved laterally toward the center of the work floor as the work floor was reduced as the construction work progressed. It is characterized by

Further, in order to achieve the first object, in the method of using a crane in the sliding formwork method according to the second aspect of the present invention, concrete is continuously filled in an annular and expandable sliding formwork. In the sliding formwork construction method of constructing a structure such as a tower-like structure by appropriately raising the sliding formwork together with the working floor while placing it and at that time, adjusting the frame diameter to the working floor. A crane is installed so that it can be horizontally pulled and slid by a jack, and as the working floor is contracted as the construction work progresses, the crane is laterally moved toward the center of the working floor to complete the construction of the structure. Later, while placing a temporary beam on the top of the structure,
It is characterized in that the crane is mounted on the temporary beam.

Further, in order to achieve the above second object, in the method of moving the mast lifting crane up and down according to claim 3 of the present invention, a mast lifting crane whose main body can move up and down along the mast In the ascending / descending movement method, a climbing rope whose one end is locked to the main body is hung around a sheep provided on the upper end of the mast and a sheep provided on the main body, and the hook of the crane is hooked on the other end of the climbing rope. The main body is moved up and down by hoisting or unwinding the crane.

<< Operation >> According to the method of using the crane in the sliding formwork method according to claim 1 of the present invention having the above-mentioned configuration, the crane is installed on the work floor by the jack so that the crane can be horizontally slid and slidably moved. However, conventionally, the material can be unloaded without any problem even if it cannot be used because its turning radius and lifting height are small. That is,
A crane with a small turning radius and a small lift can be used. Therefore, the crane to be used is inevitably small and lightweight, and the workability in a narrow space on the work floor is improved.

Further, for this reason, the construction work can be safely and promptly proceeded, the construction period can be shortened, and the cost can be reduced. Furthermore, since the crane is horizontally pulled and slid by the jack, it is possible to use a non-self-propelled crane without legs that are self-propelled to the legs, which not only reduces the weight, but also requires the work required in the past. Excessive reinforcement of the floor etc. is not required, and from this aspect as well, the cost can be reduced as much as possible.

Further, according to the method of using a crane in the sliding formwork method according to claim 2 of the present invention having the above-mentioned configuration, transfer (mounting) to a temporary beam after completion of construction can be further facilitated, and the temporary beam With the crane supported above, the dismantling work of the sliding formwork and work floor can be easily performed with good workability in a narrow space at the top of the structure.

Further, according to the method for moving up and down the mast lifting crane according to claim 3 of the present invention having the above-mentioned configuration, while supporting the load of the crane main body by the sheep provided on the upper end of the mast via the climbing rope, Since the main body is moved up and down by hoisting or unwinding the hook of the crane itself that hooks the climbing rope, it is not necessary to separately install a device for raising and lowering the main body itself, and the weight of the mast lifting crane is reduced. Can be further improved.

<< Examples >> Examples of the present invention will be described below with reference to the accompanying drawings.

1 and 2 are partially cutaway side views showing a preferred embodiment of a method of using a crane in a sliding formwork method according to the present invention. In these figures, the same parts as those described above with reference to FIG. 6, which is an explanatory view of the conventional method, are designated by the same reference numerals. Further, 6 is a lightweight and small-sized mast lifting type crane having a small turning radius and a small lift.

On the work floor 3, a plurality of rails 7 are radially arranged from the central portion of the tower-shaped structure 1, and the crane 6 is laterally slid on the rails 7 by a jack 7a via a split type base 8. It is movably mounted. As shown in the plan view of FIG. 3, the split type base 8 is composed of two half-split bases 80 and 81 which can be split by bolts.

That is, the crane 6 is supported so that the lower end of the mast 60 is sandwiched between the half bases 80 and 81.
The half-divided bases 80, 81, that is, the split-type bases 8 are mounted on the rails 7 by the jacks 7a so as to be horizontally slidable and slidable, whereby the towers on the work floor 3 are shown in phantom in FIG. The structure 1 is moved to an arbitrary position in the radial direction from the central portion.

By the way, in the construction work of the tower-shaped structure 1 by the sliding formwork method, the crane 6 is initially positioned at the outermost peripheral portion of the work floor 3, and the work floor 3 is reduced as the construction work progresses. Accordingly, the rail 7 is moved radially toward the center of the work floor 3. As a result, if the crane 6 is located substantially at the center of the work floor 3 from the beginning as in the conventional case, there is no problem even if the turning radius and the lifting height of the crane 6 are small and the capacity is insufficient. You will be able to unload materials without using them.

After completion of the construction of the tower-shaped structure 1, the crane 6
The split-type base 8 which is a supporting part of the work-type floor 8 is laterally pulled and moved, and is placed on a channel member 9 provided in advance in a substantially central portion of the work floor 3 and a temporary beam is provided on the top of the tower-shaped structure 1. Put 10 A standard base 11 for supporting the lower end of the mast 60 of the crane 6 is fixed to a predetermined portion of the temporary beam 10, and the standard base 11 is provided at the center of the standard base 11 as shown in the plan view of FIG. The lower end of the mast 60 is fitted.

Then, the crane 6 is changed from the support by the split type base 8 to the support by the standard base 11 by the below-mentioned climbing down work, that is, from the work floor 3 to the temporary beam.
It will be relocated to the top 10. It should be noted that FIG. 2 shows the crane 6 after being relocated onto the temporary beam 10.

Therefore, after the relocation, the sliding formwork 2 and the work floor 3 are moved by the crane 6 supported by the standard base 11 on the temporary beam 10.
The dismantling work of can be carried out. In addition, the dismantling (dismantling) of the crane 6 after dismantling the sliding formwork 2 and the work floor 3 is performed by a climb-down work described later by the main body of the crane 6 concerned.
This is done by lowering 61 to standard base 11.

5 (1) to (15) are explanatory views showing the climb-down work of the crane 6 for each procedure.

The contents of each work (1) to (15) shown in FIG. The mast 60 of the crane 6 is constructed by connecting a lower mast 60a and an upper mast 60b.

In work (1), the sheave block 63 is lifted by the hook 62 of the crane 6 and attached to the upper end of the upper mast 60b.

In operation (2), the two one-car sheaves 63a, 63b provided on the sheave block 63 are locked to the guide mast 61a on the main body 61 by pins. Then, hook 62 to climbing rope 63
The main body 61 is slightly raised by being hooked on c and wound up, and the lock metal fitting 61b provided on the side surface of the guide mast 61a is pivoted outward to be released. Here, the climbing rope 63c has a predetermined length and is wound around the sheave 63a with one end fixed, and the hook 62 hooked at the other end is wound up to extend its entire length. Then, when the hook 62 is wound more than the feeding length, the main body rises.

In work (3), the hook 62 is wound down to lower the main body 61 by the length of the upper mast 60b. And lock metal fittings 6
Hook 1b on the lower mast 60a to fix (lock) it.

In operation (4), the hook 62 is hooked on the sheave block 63, and the sheave block 63 and the upper mast 60b are suspended.

In operation (5), only the sheave block 63 is lifted by the hook 62 and attached to the upper end of the lower mast 60a.

The work (6) is similar to the work (2) described above,
That is, two one-car sheaves 63a equipped with sheave blocks 63,
63b is locked to the guide mast 61a on the main body 61 by a pin. Then, the hook 62 is hooked on the climbing rope 63c and wound up to slightly raise the main body 61, and the lock fitting 61b provided on the side surface of the guide mast 61a is pivoted outward to be released.

The work (7) is similar to the work (3) described above,
That is, the hook 62 is wound down to lower the main body 61, and fixed on the split mold base 8.

The work (8) is similar to the work (4) described above,
That is, the hook 62 is hooked on the sheave block 63, and the sheave block 63 is hung.

In operation (9), the standard base 11 is hung by the hooks 62, placed on the temporary beam 10 (not shown), and fixed.

In the work (10), the upper mast 60b is lifted by the hook 62 and placed on the lower mast 60a to be fixed, and the lower mast 6b is fixed.
Connect 0a and upper mast 60b.

In the work (11), the upper mast 60b and the lower mast 60a connected to the upper mast 60b are brought into a state of being lifted by the hook 62, and thereafter, the lower end of the lower mast 60a and the split base 8 are separated.
Remove fasteners such as bolts and nuts that fasten the and. Next, the hook 62 is wound down to lower and lower the lower mast 60a and the upper mast 60b from the split base 8, and the lower end of the lower mast 60a is fitted and fixed to the standard base 11.

The work (12) is the same as the work (1) described above,
In other words, the sheave block 63 is lifted by the hook 62,
Attach to the upper end of the upper mast 60b.

In the operation (13), the two one-vehicle sheaves 63a, 63b provided on the sheave block 63 are locked to the guide mast 61a on the main body 61 by a pin. And hook 62 climbing rope 63c
The main body 61 is slightly lifted by hooking it on the upper mast 60b and hooking it to the upper mast 60b to fix (lock) it.

The work (14) is similar to the work (4) described above,
That is, the hook 62 is hooked on the sheave block 63, and the sheave block 63 is hung.

In work (15), the split base 8 is divided into two half bases.
Divide into 80 and 81, and withdraw (dismantle) with hook 62.

Therefore, the crane 6 has the operations (1) to
By executing (15), the support by the split type base 8 is changed to the support by the standard base 11, and the work is transferred from the work floor 3 to the temporary beam 10. In addition, the removal (disassembly) of the crane 6 relocated on the temporary beam 10 is the work (1)-
It is performed after lowering the main body 61 to the standard base 11 in the manner of (8).

As is clear from the above description of the climb-down work, the main body can be easily climbed up by the same work as the climb-down work.

That is, according to such a method, the crane 6 can be laterally pulled and slid by the jack 7a to be positioned at the outermost peripheral portion of the work floor 3, so that the crane 6 can work as in the conventional work floor. If it is installed in the substantially central portion of 3, the material can be unloaded without any problem even if it cannot be used because its turning radius and lifting height are small. That is, as the crane 6, a crane having a small turning radius and a small lift can be used.

Therefore, the crane 6 is inevitably small in size and light in weight and does not require traveling wheels for self-propelling. This not only improves workability in a narrow space at the top of the structure 1 but also in the tower. Beam after completion of construction of the structure 1
It can be easily moved (placed) on the floor 10, and the crane 6 supported by the standard base 11 on the temporary beam 10 can dismantle the sliding formwork 2 and the work floor 3.

Therefore, the construction work of the tower-shaped structure 1 by the sliding formwork method can be safely and promptly proceeded, whereby the construction period can be shortened. On the other hand, since the crane 6 is light in weight, it does not require excessive reinforcement of the work floor 3 and the like, which is conventionally required, and the cost can be reduced, which is a large cost considering the shortening of the construction period described above. There are things that lead to reduction.

<< Effects of the Invention >> As described in detail in the above embodiments, according to the method of using a crane in the sliding formwork method according to the first aspect of the present invention, the crane is laterally slid by the jack on the work floor. Since it is installed so that it can move freely,
Conventionally, the material can be unloaded without any problem even if it cannot be used because the turning radius and the lifting height are small. That is, a crane with a small turning radius and a small lift can be used. Therefore, the crane to be used is inevitably small and lightweight, and the workability in a narrow space on the work floor is improved.

Further, for this reason, the construction work can be safely and promptly proceeded, the construction period can be shortened, and the cost can be reduced. Furthermore, since the crane is horizontally pulled and slid by the jack, it is possible to use a non-self-propelled crane without legs that are self-propelled to the legs, which not only reduces the weight, but also requires the work required in the past. Excessive reinforcement of the floor etc. is not required, and from this aspect as well, the cost can be reduced as much as possible.

Further, according to the method of using a crane in the sliding formwork method according to claim 2 of the present invention, transfer (placement) to a temporary beam after completion of construction can be further facilitated, and the crane can be supported on the temporary beam. With the crane, the dismantling work of the sliding formwork and the work floor can be easily performed with good workability in a narrow place at the top of the structure.

According to the method of claim 3 of the present invention, while supporting the load of the crane main body by the sheave provided on the upper end of the mast via the climbing rope, the crane itself hooked on the climbing rope. Since the main body is vertically moved by hoisting or unwinding the hook, it is not necessary to separately provide a device for vertically moving the main body itself, and the weight of the mast lifting crane can be further reduced.

[Brief description of drawings]

1 and 2 are partially cutaway side views showing a preferred embodiment of a method of using a crane in a sliding formwork method according to the present invention, and FIG. 3 is a plan view of a split base supporting a crane, and FIG. The figure shows a plan view of the standard base supporting the crane,
FIG. 5 is an explanatory view showing the climb-down work of the crane for each procedure. 1 ... Structure (tower structure), 2 ... Sliding formwork 3 ... Work floor, 6 ... Crane 7a ... Jack, 10 ... Temporary beam

Claims (3)

[Claims] 1. A tower in which concrete is continuously cast into an annular, expandable and contractible sliding formwork, and the sliding formwork is gradually pulled up together with its working floor, and at that time, the frame diameter is appropriately adjusted. In a sliding formwork method for constructing a structure such as a structure, a crane is installed on the working floor so that it can be horizontally slid by a jack, and the working floor is reduced as the construction work progresses. A method of using a crane in a sliding formwork method, wherein the crane is laterally moved toward the center of the work floor. 2. A tower in which concrete is continuously cast into an annular, expandable and contractable sliding formwork, and the sliding formwork is gradually pulled up together with its working floor, and at that time, the frame diameter is appropriately adjusted. In a sliding formwork method for constructing a structure such as a structure, a crane is installed on the working floor so that it can be horizontally slid by a jack, and the working floor is reduced as the construction work progresses. The crane is laterally moved toward the center of the work floor, and after the construction of the structure is completed, a temporary beam is placed on the top of the structure and the crane is placed on the temporary beam. How to use the crane in the sliding formwork method characterized by. 3. A method of raising and lowering a mast lifting type crane, wherein a main body can be moved up and down along a mast, wherein a climbing rope having one end locked to the main body is provided on the sheave and the main body. A method of raising and lowering a mast raising and lowering crane, characterized in that the main body is moved up and down by hanging it around the provided sheave, hooking the hook of the crane on the other end of the climbing rope, and hoisting or unwinding the crane.