JP2002276199A - Tower construction machine and tower construction method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] For example, a column-shaped steel tower which is required to have a height and is extremely slender, such as a radio tower or a chimney,
An object of the present invention is to provide a tower construction machine and a tower construction method that can be reliably, easily, stably, and inexpensively constructed even on a small site. A tower 2 to be constructed is sandwiched between the towers 2 to be constructed.
And a work yard 6 provided with a lifting means 7 is provided at the upper end of the mast 4, and the upper end of the set of masts 4 is constructed. Lifting means for raising the tower 2 above
5 is provided. The construction by the tower material construction machine 1 installed by the above work is performed by the lifting work by the lifting means 7.
The moment for twisting the tower construction machine 1 and the tower 2 is small and stable. Further, since the tower construction machine 1 is supported by the tower 2 under construction, the construction is reliable even on a small site. Further, since there is no need to extend the mast 4 upward, the construction cost is low.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower construction machine and a tower construction method for constructing a tower.
The present invention relates to a tower construction machine and a tower construction method for constructing a columnar tower having a required height and a very slender shape, such as a radio tower and a chimney.

[0002]

2. Description of the Related Art Steel towers include radio towers, television towers, radio towers, chimneys and the like. Each of these towers is required to have a certain height or higher in terms of its functional aspect or design aspect as a city symbol or the like.

[0003] Among them, the radio tower, the chimney, and the like are required to have a height from the above-mentioned side, but, unlike the television tower and the like, are towers that can tolerate the shaking of the tower itself to some extent. Therefore, conventionally, as a radio tower, a chimney or the like, a height is required, and a columnar steel tower having an extremely slender shape, for example, a steel pipe column having a diameter of about 2 m is formed by being vertically connected to a height of about 200 m. Such towers have been built.

[0004] In general, a crane for lifting construction materials and equipment is used for construction of a structure. As the crane, for example, a crawler crane, a side tower crane, a climbing crane, and the like are known. These cranes are properly used depending on the shape and height of the structure, site conditions, and the like. Each of the cranes has also been used for constructing a column-shaped steel tower which requires a height and has a very slender shape.

[0005]

However, the use of each of the cranes for the construction of the column-shaped steel tower involves various construction and structural problems.

In the crawler crane, the base end of the crane's boom is located on a vehicle body installed on the ground, and the length of the boom is limited. Therefore, there is a limit to the height of the structure that can be constructed, and in many cases, it is not possible to cope with the construction of the columnar tower requiring a height. Further, since a sufficiently large site for raising and lowering the boom is required, it may not be possible to cope with the situation of the site.

The side tower crane is provided such that a crane mast thereof stands on a support board and is close to a side surface of a structure. For this reason, the crane mast itself is required to have extremely high rigidity, and when constructing a structure having a height, it is necessary to extend the crane mast upward. Therefore, the construction cost becomes expensive.

Further, the climbing crane is provided with a crane mast partially engaged with a certain side surface of the structure, and the crane mast is supported by the structure.
For this reason, when a building material is lifted by a crane, a large moment acts on the crane mast located below the base end of the boom. Since the crane mast is supported by the structure, a moment acts on the structure to twist the structure. This moment is the horizontal distance between the boom base and the lifting point,
It is expressed as the product of the lifting weight. Incidentally, the columnar tower is required to have a high height and a very slender shape, so that the tower material itself is required to have a large horizontal rigidity. For this reason, the thickness of the tower material increases, and the tower material to be lifted is
For example, the weight tends to be as large as about 35 t. Therefore, the extremely large moment acts on the structure engaged with the crane mast. Accordingly, the structure is required to have a very large horizontal rigidity to suppress the horizontal deformation caused by the moment to an allowable deformation. However, the columnar tower often cannot secure the horizontal rigidity. Therefore, the construction method using the climbing crane is an extremely unstable construction method.

Further, in the construction method using the climbing crane, it is very difficult to reinforce the temporary facilities in order to compensate for the insufficient horizontal rigidity of the structure as described above when constructing a structure requiring a high height. Not only that, but the construction costs are significantly higher.

An object of the present invention is to provide a column tower having a required height and a very slender shape, such as a radio tower or a chimney, for example, reliably, easily and stably even on a small site. An object of the present invention is to provide a tower construction machine and a tower construction method that can be constructed at low cost.

[0011]

Means for Solving the Problems To solve the above-mentioned problems, the invention according to claim 1 is arranged at a position sandwiching a steel tower 2 to be constructed as shown in FIGS. At least one set of masts 4 supported on the tower 2;
Elevating means (for example, a guide rail 3 and a climbing slider 5) for raising the set of masts 4 so that the upper end thereof is higher than the steel tower 2 under construction, and the upper end of the set of masts 4 is provided. A work yard 6 is provided in the work yard 6, and a lifting means (for example, a steel tower material lifting machine 7) for lifting a steel tower material 2a to be added to the steel tower 2 under construction is horizontally movable. It is characterized by being provided.

According to the first aspect of the present invention, the set of masts is raised by the raising means so that the upper end thereof is above the steel tower under construction.
The work yard provided at the upper end of the set of masts also rises above the tower. Accordingly, the work yard can be positioned above the steel tower without going through a step of extending the mast upward, and the steel tower material to be added to the steel tower being constructed by the lifting means. Can be lifted and added. Moreover, since the set of masts is supported by the steel tower under construction, construction can be performed reliably even on a narrow site. Therefore, inexpensively, even on small sites,
The construction work of the columnar tower can be performed.

According to the first aspect of the present invention, the lifting means for lifting the steel tower material to be added on the steel tower under construction is provided in the work yard located at the upper end of the pair of masts. Is provided. Accordingly, when the tower is constructed by lifting the tower material by the lifting means, the lifting point of the lifting means is located between the pair of masts in the work yard. Therefore, the center of gravity of the structure including the steel tower under construction, the set of masts, and the work yard at the time of performing the lifting work is also located near the pair of masts. By the way, the center of rigidity of the structure, that is, the rigidity, is obviously located near the center of the pair of masts, that is, near the position of the tower under construction. Therefore,
During the lifting operation by the lifting means, the deviation between the center of gravity and the rigid center, that is, the eccentricity is reduced. Thereby, the moment acting to twist the structure caused by the eccentricity during the lifting operation is reduced, and therefore, the horizontal deformation of the structure caused by the moment is also reduced. Therefore, even if the tower material to be lifted is heavy, construction work of the columnar tower can be performed easily and stably.

The steel tower may be, for example, a square or circular steel pipe column, or a steel tube assembled into a truss-like column.

The mast may be, for example, a square or circular steel pipe column, or a steel tube assembled into a truss-like column.

As the elevating means, for example, an elevating device which engages with each of the tower under construction and the set of masts is provided, and by operating the elevating device, the set of masts is attached to the tower. There is a method of raising the pressure. In addition, various forms can be considered as the lifting device.

In order to provide the tower material lifting machine so as to be horizontally movable, for example, a horizontally moving girder may be provided on the work yard, and the tower material lifting machine may be run on the horizontally moving girder. In addition, it is desirable that the steel tower material lifting machine is a disassembly-assembled one or a lightweight one that can be easily suspended and removed during disassembly.

It is desirable that a guide rail and a jib crane for lifting a small crane used for dismantling are further provided on the work yard.

Preferably, the jib crane includes a boom that can turn around a vertical axis and a traveling cart that can move horizontally on the work yard.

The disassembly method includes, for example,
After dismantling the tower material lifting machine on the work yard, the jib crane suspends and removes the mast and the like that can be disassembled, and removes the mast. Then, a crane smaller than the jib crane is lifted to the work yard by the jib crane, and the jib crane and the other dismantleable mast are suspended and removed by the crane. Further, by the crane, a crane smaller than the crane is installed on the work yard, so that the crane is gradually reduced in size, and the last crane is grasped and removed by a person. The dismantling method used can be adopted.

According to a second aspect of the present invention, there is provided a method for constructing a pylon 2 by using the pylon construction machine 1 according to the first aspect, wherein first a pylon material constituting a lower end portion of the pylon 2 to be constructed. 2 (2f) is erected on a support board (for example, ground), and then the tower construction machine 1 is set so that at least one set of masts 4 sandwiches the erected tower material 2 (2f). Then, the pair of masts 4 are supported by the tower material 2 (2f), and the upper end of the mast 4 is moved from the tower material 2 (2f) by the lifting means (for example, the guide rail 3 and the climbing slider 5). By raising the work yard 6 upward, the work yard 6 is connected to the steel tower material 2 (2f).
A lifting step of raising the steel tower material 2 (2f) to the steel tower material 2 (2f) by a lifting means (for example, a steel tower material lifting machine 7) on the work yard 6 after the lifting step;
And a replenishing step of replenishing and then replenishing is repeated a predetermined number of times.

According to the second aspect of the present invention, the tower material constituting the lower end of the tower to be built is erected on the support board, and the tower construction machine is mounted on at least one set of masts. The steel tower material is supported by the steel tower material so as to sandwich the steel tower material, and the steel tower is constructed by repeating the ascending step and the extending step a predetermined number of times. Here, the lifting step is performed by the lifting means without passing through a step of extending a mast upward so that the work yard is positioned above the steel tower. In addition, since the set of masts is supported by the steel tower, construction can be performed reliably even on a small site. Therefore, the construction work for the columnar tower can be performed easily and inexpensively and reliably even on a narrow site.

According to the second aspect of the present invention, the steel tower under construction, the set of masts,
The eccentricity of the structure constituted by the work yard is reduced. Thereby, the moment acting to twist the structure caused by the eccentricity is reduced, and therefore, the horizontal deformation of the structure caused by the moment is also reduced. Therefore, even if the tower material to be lifted is heavy, the construction work of the columnar tower can be stably performed.

The supporting board is the ground when the tower is constructed on the ground, and is the structure when the tower is constructed above the structure.

Since the steel tower to be constructed is extremely slender in shape, it is necessary to take measures to prevent the steel tower from overturning. As one of the methods, a method is considered in which the steel tower is simultaneously pulled from a plurality of directions with a tensile member such as a stay cable.

According to a third aspect of the present invention, in the method for constructing a tower according to the second aspect, when the tower is constructed by successively adding the tower materials, a tensile member (for example, a stay) is provided from a predetermined location on the work yard 6. It is characterized in that the cable 10) is hung down, a tensile force adjusting device 11 is provided on the support board (for example, the ground 12), and the tensile member is tightly connected to the tensile force adjusting device 11.

According to the third aspect of the present invention, a tensile member is hung from a predetermined position on the work yard, and the tensile member is tied to a tension adjusting device provided on the support board.
As described above, in the columnar tower, since the tower material itself is required to have high rigidity, the wall thickness of the tower material increases, and therefore, the tower material to be lifted tends to be heavy. Therefore, when the tower material is lifted by the lifting means, even if the eccentricity is small, the moment acting to twist the structure may increase due to the large weight of the tower material even when the eccentricity is small. . Here, since the work yard can be opposed to the moment by pulling the work yard by the tensile member tied to the tensile force adjusting device, horizontal deformation of the structure is prevented. Therefore, even if the tower material to be lifted is heavy, the construction work of the columnar tower can be performed more stably.

The predetermined location is, for example, a position on the work yard opposite to the lifting point of the lifting means with the set of masts interposed therebetween.

Further, a load detecting sensor is provided in the tensile force adjusting device, and the back stay cable is automatically wound or unwound by a winch, whereby the tension of the back stay cable 10 is increased. The power is automatically adjusted.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a tower construction machine and a tower construction method according to the present invention will be described in detail. First, the configuration and the like of the tower construction machine will be mainly described.

1 to 3, reference numeral 1 denotes a tower construction machine according to the present invention. As shown in FIGS. 1 and 2, a pair of guide rails 3 are provided on both sides of the steel tower 2 to be constructed so as to sandwich the steel tower 2. A pair of masts 4 are provided so as to sandwich the guide rail 3 (elevating means) and to be movable in the vertical direction with respect to the guide rail 3. A climbing slider 5 (elevating means) for engaging with the guide rail 3 and elevating the set of masts 4 with respect to the steel tower 2 is provided on the mast 4.
Is provided. A work yard 6 is formed at the upper end of the pair of masts 4, and on the work yard 6,
Tower material lifting machine 7 (lifting means) mainly for lifting heavy members such as tower material 2a, and jib crane 8 mainly for lifting guide rails 3 and small cranes used for dismantling.
And is installed. The pylon 2 is pulled by a stay cable 9 from a plurality of directions, thereby preventing the pylon 2 from overturning. Work yard 6
A backstay cable 10 (tensile member) from the opposite type with respect to the tower material lifting machine 7 with the set of masts 4 interposed therebetween.
Is hung by a tension adjusting device 11 provided in the ground 12. The tensile force adjusting device 1
1, a load detection sensor (not shown) is provided.
When the back stay cable 10 is automatically wound or unwound by a winch (not shown), the tensile force of the back stay cable 10 is automatically adjusted.

The tower material lifting machine 7 is provided with a traveling carriage 7a that can travel on the horizontally moving girder 6c shown in FIG. 3 and a winch 7b for lifting the tower material 2a. The jib crane 8 includes a traveling cart 8a that can travel on the work yard 6 and a boom 8b that can turn around a vertical axis. By the jib crane 8,
It is possible to assist the lifting work of the tower material 2a by the tower material lifting machine 7 and to lift the guide rail 3 and a small crane used for dismantling.

As shown in FIG. 2, in the vicinity of the upper end of the pair of masts 4, two reinforcing members 6a are provided for each mast 4 so as to connect the mast 4 and the work yard 6. Are provided in an oblique direction. The work yard 6 is stably supported by the pair of masts 4 by the reinforcing members 6a, which are steel members.

As shown in FIG. 3, a rectangular work yard 6 is formed at the upper end of the pair of masts 4.
The work yard 6 is supported by the pair of masts 4 near the midpoint of each of the pair of long sides.
Of the two areas of the work yard 6 divided by a line connecting the pair of masts 4, the tower material lifting machine 7 is installed in one area, and the jib crane 8 is installed in the other area. is set up. On the work yard 6, two horizontally moving girder 6c are provided in the long side direction thereof so as to be parallel to each other, and the steel tower lifting machine 7 is guided by the horizontally moving girder 6c. , Can be moved horizontally on the work yard 6. In the work yard 6, a stairwell 6 b is formed in a range where the tower material lifting machine 7 moves horizontally, so that the tower material lifting machine 7 lifts the work tower 6 a while lifting the tower material 2 a. It is possible to move horizontally. A walkway 6d and a handrail 6e are provided at an edge of the work yard 6 on the long side.

As shown in FIG. 4, brackets 2b are provided on the steel tower 2 at predetermined intervals, and brackets 3a are also provided on the guide rails 3 at predetermined intervals. The guide rail 3 has its bracket 3a bolted or welded to the bracket 2b of the tower 2. The guide rail 3 and the tower 2 are fixed by a guide rail support beam provided at the fixed portion. 2c. In the guide rail 3, grooves 3b for inserting upper lock pins 5d, lower lock pins 5f, ends 5h of climbing stoppers 5g, and the like, which will be described later, are formed at predetermined intervals. The mast 4 and the guide rail 3 can be engaged.

On the opposite side of the guide rail 3 from the steel tower 2 side, the mast 4 is provided movably in the vertical direction along the guide rail 3. The mast 4 is provided with two climbing rollers 4a that can press the guide rails 3 vertically and on opposite sides of the guide rails. The climbing roller 4a allows the mast 4 to move the guide rail 3
, And is movable in the vertical direction. The upper and lower two climbing rollers 4a
On the opposite side of each of the guide rails 3,
A gap adjusting cylinder 4b that can expand and contract in the horizontal direction is provided. By the clearance adjusting cylinder 4b, the climbing roller 4a can press the guide rail 3 with an appropriate pressure, so that the mast 4 moves stably in the vertical direction along the guide rail 3. It is possible.

A vertically movable main cylinder 5a is fixed to the mast 4, and a climbing slider 5 that can move up and down along the mast 4 is provided at the lower end of the main cylinder 5a. Is formed.
The climbing slider 5 formed of a three-dimensional frame is provided with a total of six climbing rollers 5b capable of pressing the mast 4 from both sides. The climbing roller 5b allows the climbing slider 5 to move stably in the vertical direction along the mast 4.

An upper lock cylinder 5c is provided near the upper end of the main cylinder 5a and is extendable in the horizontal direction. An upper lock pin 5d is provided at the tip of the upper lock cylinder 5c. . The upper lock pin 5d is extended by extending the upper lock cylinder 5c.
Is inserted into the groove 3 b provided in the guide rail 3, whereby the mast 4 can be locked in the vertical direction with respect to the guide rail 3. The climbing slider 5 is provided with a lower lock cylinder 5e that can expand and contract in the horizontal direction, and a lower lock pin 5f is provided at the tip of the lower lock cylinder 5e. By extending the lower lock cylinder 5f and inserting the lower lock pin 5f into the groove 3b provided in the guide rail 3, the mast 4
Can be locked to the guide rail 3 in the vertical direction.

At the lower end of the mast 4, a climbing stopper 5 g is rotatably provided so as to be capable of engaging and disengaging from the groove 3 b provided on the guide rail 3. By rotating the climbing stopper 5g, the end 5h of the climbing stopper 5g can be inserted into the groove 3b or removed from the groove 3b.

Next, a method of constructing the tower 2 using the tower construction machine according to the present invention will be described in detail for each step.
FIG. 4 is a diagram showing a flow of a construction process of the steel tower 2.

[Leg Construction Step] As shown in FIG. 6, the [leg construction step] for constructing the legs of the steel tower 2 to be constructed will be described. First, piles (not shown), footing, and the like are appropriately provided on the ground 12 below the location where the steel tower 2 is to be constructed. Next, the leg frame 2d is lifted by a rough terrain crane (not shown) and installed on the pile. next,
The first frame construction by the rough terrain crane, that is, the leg frame 2d of the tower material 2 (2f) at the lower end
Connection to the top. At this time, the tower material 2 (2f)
By pulling the stay cable 9 attached to the upper end of the steel tower material 2 (2
The above-mentioned connection work is performed while adjusting the vertical accuracy of the tower material 2 while preventing the fall of f). A spherical base 2e is provided between the leg frame 2d and the tower material 2 (2f).
Is provided. Accordingly, the lower end of the tower material 2 (2f) is supported by pins, and a moment is prevented from acting on the lower end of the tower material 2 (2f).
It is possible to construct the steel tower 2. It should be noted that brackets 2b are previously provided at predetermined intervals on the steel tower material 2 (2f).

[Installation Step of Steel Tower Construction Machine] Next, as shown in FIG. 7, the steel tower lifting machine 7 is connected to the steel tower material 2 (2
A description will be given of the [tower construction machine installation process] supported by f). First, two members in which one guide rail 3 and one mast 4 are engaged are assembled on the ground 12. The method of engagement includes the upper lock pin 5d, the lower lock pin 5f, the climbing stopper 5g.
Is inserted into the groove 3 a provided in the guide rail 3. Thereby, the guide rail 3 and the mast 4 are integrated. In addition,
Brackets 3a are provided on the guide rail 3 at predetermined intervals in advance.

Next, the guide rail 3 and the mast 4
Are lifted one by one by the rough terrain crane, and the steel tower material 2 (2
Fix to the side of f). In the fixing method, the bracket 2a of the tower material 2 and the bracket 3b of the guide rail 3 are fixed by bolts or welded. Further, a guide rail support beam 2c is provided in the fixing part, so that the steel tower 2 and the guide rail 3 are more reliably fixed.

Next, a rectangular work yard 5 is constructed at the upper end of the pair of masts 4 by the rough terrain crane. At this time, the set of masts 4 supports the work yard near the midpoint of the set of long sides. Also, 2 for each mast 4
A steel member 6a is provided obliquely so as to connect the mast 4 and the work yard 6. Thereby, the work yard 5 is stably supported by the pair of masts 4. Also, on the work yard 6, in the direction of its long side,
Two horizontally moving girders 6c which are parallel to each other
In the range where the steel tower material hoisting machine 7 moves horizontally on the horizontally moving girder 6c,
b is formed. Further, a walkway 6d and a handrail 6e are appropriately provided at the edge of the work yard 6 on the long side.

Next, of the two areas on the work yard 6 separated by a line connecting the pair of masts 4 by the rough terrain crane, the steel tower material lifting machine 7 is provided in one of the areas. The jib crane 8 is lifted and installed in the other area.

[Steel Tower Material Adding Step] Next, as shown in FIG. 1 and FIG. 7, the [steel tower material adding step] in which the steel tower material 2a is lifted and added to the standing steel tower 2 under construction will be described. I do. The tower material 2a temporarily placed on the ground 12 is lifted and connected to the upper end of the standing tower 2 under construction. At this time, as shown in FIG.
The tower 2 is lifted at a predetermined distance from the tower 2 and then lifted to a predetermined horizontal level. Then, the tower material lifting machine 7 is moved on the horizontal moving girder 6c, so that the upper end of the tower 2 is being constructed. connect.

[Tower Construction Machine Elevation Step] Next, as shown in FIG. 7 and FIG. 12, the “tower construction machine elevation step” in which the pylon construction machine 1 is raised with respect to the pylon 2 will be described. . FIG. 12 shows an engagement portion between one mast and one guide rail.
This is performed simultaneously for one set of masts and one set of guide rails.

As shown in FIG. 12A, the upper lock pin 5d, the lower lock pin 5f, and the end 5h of the climbing stopper 5g are formed in the groove 3 of the guide rail 3.
b, it is confirmed that the mast 4 and the guide rail 3 are integrated.

Next, as shown in FIG. 12B, the upper lock cylinder 5c is contracted, and the upper lock pin 4f inserted into the groove 3b of the guide rail 3 is removed from the groove 3b. Further, the climbing stopper 5g is rotated to remove the end 5h of the climbing stopper 5g from the groove 3b.

Next, as shown in FIG. 12C, the main cylinder 5a is extended. As a result, the fixing point 4c between the main cylinder 5a and the mast 4 and the lower lock pin 5f and the groove 3b of the guide rail 3
The mast 4 ascends with respect to the guide rail 3, that is, ascends with respect to the pylon 2, with the engagement portions with the two as fulcrums.

Next, as shown in FIG. 12D, the lower lock cylinder 5e is contracted to remove the lower lock pin 5f from the groove 3b of the guide rail 3.

Next, as shown in FIG. 12E, the main cylinder 5a is contracted to
Is lifted with respect to the mast 4 and the guide rail 3. Thereafter, the lower lock cylinder 5e is extended, and the lower lock pin 5f is inserted into the groove 3b located above the groove 3b in which the lower lock pin 5e was originally inserted.

By repeating the above-mentioned [tower material addition step] and [tower construction machine raising step] a predetermined number of times, a steel tower can be constructed as shown in FIGS. .

As shown in FIGS. 8 to 10, in the process of constructing the tower 2, when the tower material 2a is lifted by the tower lifting machine 7, a moment acting to twist the tower building machine 1 is used. May be excessive. In this case, as shown in FIG.
The work yard 6 is suspended from the opposite type with the tower material lifting machine 7 with the pair of masts 4 interposed therebetween.
It is tied to a tension adjusting device 11 suitably embedded therein. The tensile force adjusting device 11 is provided with a load detection sensor (not shown).
0 is automatically wound or unwound by a winch (not shown), so that the tensile force of the back stay cable 10 is automatically adjusted.

In the process of constructing the tower 2 as shown in FIGS. 8 to 10, the lifting work scaffold 6i for the construction of the tower 2 as shown in FIG. , Can be easily secured by hanging the cable 6h. The lifting work platform 6i
Is provided so as to be able to move up and down by a winch 6j provided at an upper end portion of the cable 6h, and also serves as a storm facility.

Further, as shown in FIGS.
As shown in FIG. 11, the work yard 6 is extended in a plane in the process of constructing a temporary storage of a scaffolding material, a welding device, a temporary material, and other materials and equipment that can be used for various purposes. The placement space 6f can be easily secured.

Hereinafter, the tower construction machine 1 after the construction of the tower 2
Will be described. As shown in FIG. 4, after dismantling the steel tower material hoisting machine 7 on the work yard 6, the jib crane 8 suspends and removes the mast 4, etc., which can be dismantled by the jib crane 8. Remove the suspension. The jib crane 8 lifts a small 4t hanging small crane (not shown) smaller than the jib crane 8 onto the work yard 6, and the jib crane 8 and the other dismantleable mast 4 etc. are lifted by the 4t hanging small crane. Remove the suspension. Further, the 4t hanging small crane lifts a 2t hanging simple crane (not shown), which is smaller than the 4t hanging small crane, onto the work yard 6, and the 4t hanging small crane and other dismantling are performed by the 2t hanging simple crane. The possible mast 4 and the like are suspended and removed. And finally, the 2t hanging simple crane dismantled is grasped by a person and removed.

According to the present embodiment, the following effects can be obtained. After the [leg building process] and the [tower construction machine installation process], the [tower building material adding process] and the [tower construction machine raising process] are repeated a predetermined number of times, whereby the steel tower 2 is constructed. Here, the [pylon construction machine lifting process]
Is performed by the climbing slider 5 or the like without going through a step of extending the mast 4 so that the work yard 6 is located above the steel tower 2. In addition, since the pair of masts 4 are provided to be supported by the steel tower 2, the construction is reliably performed even on a small site. Therefore, even if the tower material 2a to be lifted is heavy, the construction work of the columnar tower can be performed easily and inexpensively and securely even in a narrow site.

At the time of the above-mentioned step of adding steel tower materials, the steel tower 2 under construction, the set of masts 4, the work yard 6,
The eccentricity of the structure composed of is reduced. Accordingly, the moment acting to twist the structure caused by the eccentricity is reduced, and the horizontal deformation of the structure caused by the moment is also reduced. Therefore, even if the tower material 2a to be lifted is heavy, the construction work of the columnar tower can be performed easily and stably.

On the work yard, mainly the tower material 2
Both a steel tower lifting machine 7 for lifting heavy members such as a and a jib crane 8 for lifting mainly the guide rail 3 and a small crane used for dismantling are provided. Therefore, the members to be lifted can be easily sorted, and even if a complicated mounting operation occurs when constructing the steel tower 2, the suspension can be easily replaced. Therefore, workability can be greatly improved.

When the tower material 2a is lifted by the tower material lifting machine 7, even if the moment acting to twist the structure becomes large, the work of the steel tower material lifting machine 7 The back stay cable 10 hangs down from the opposite type with the pair of masts 4 interposed therebetween, and is tied to the tension adjusting device 11 embedded in the ground 12 to oppose the moment. The tensile force adjusting device 11 is provided with a load detection sensor,
When the back stay cable 10 is automatically wound or unwound by the winch, the tensile force of the back stay cable 10 is automatically adjusted.
Therefore, the horizontal deformation of the structure is prevented, and even if the tower material 2a to be lifted is heavy, the construction work of the columnar tower can be performed more stably.

In the process of constructing the tower 2, the lifting work platform 6 i for constructing the tower 2 is moved to the work yard 6.
From the cable 6h provided with a winch 6j at the upper end
Can be easily secured. Further, the elevating work scaffold 6i can also serve as a storm facility.

In the process of constructing the steel tower 2, the work yard 6 is extended in a plane so that
It is possible to easily secure a temporary storage space 6f that can be used for temporary storage of welding equipment, temporary materials, and other various purposes.

Since the steel tower 2 under construction is connected to the upper part at a high position, and the steel tower construction machine 1 is supported by the steel tower 2, an extremely large compressive force acts on the steel tower 2. In this case, it is desirable to take some measures so that the steel tower 2 does not buckle. As one of the methods,
Although not particularly shown in the present embodiment, a method of providing a plurality of stringed cables connecting the upper and lower points of the steel tower 2 in a well-balanced manner, and tensioning the stringed cables may be considered.

[0065]

According to the first aspect of the present invention, the work yard can be positioned above the steel tower without going through a step of extending a mast upward, and further, the lifting means can It becomes possible to carry out the work of lifting and adding the tower material to be added on the steel tower under construction. In addition, since the pair of masts is provided to be supported by the steel tower under construction, construction can be performed reliably even on a small site. Therefore, the construction work of the columnar tower can be reliably performed at low cost even on a narrow site.

According to the first aspect of the present invention, when the lifting work is performed, the eccentricity of the structure constituted by the steel tower under construction, the set of masts, and the work yard is reduced. Thereby, a moment generated by the eccentricity and acting to twist the structure is reduced,
Horizontal deformation of the structure resulting from the moment is also reduced. Therefore, even if the tower material to be lifted is heavy, construction work of the columnar tower can be performed easily and stably.

According to the second aspect of the present invention, the tower material constituting the lower end portion of the tower to be built is erected on the support board, and the tower construction machine is mounted on at least one set of masts. The steel tower material is supported by the steel tower material so as to sandwich the steel tower material, and the steel tower is constructed by repeating the ascending step and the extending step a predetermined number of times. Here, the lifting step is performed by the lifting means without passing through a step of extending a mast upward so that the work yard is positioned above the steel tower. In addition, since the set of masts is provided to be supported by the steel tower, construction is reliably performed even on a narrow site. Therefore, the construction work for the columnar tower can be performed easily and inexpensively and reliably even on a narrow site.

According to the second aspect of the present invention, the steel tower under construction, the set of masts,
The eccentricity of the structure constituted by the work yard is reduced. Accordingly, the moment acting to twist the structure caused by the eccentricity is reduced, and the horizontal deformation of the structure caused by the moment is also reduced. Therefore, even if the tower material to be lifted is heavy,
The construction work of the columnar tower can be performed easily and stably.

According to the third aspect of the invention, the same effects as those of the second aspect of the invention can be obtained, and when the steel tower material is lifted by the lifting means, the structure is twisted. Even when the acting moment becomes large, the tensile member opposes the moment, so that horizontal deformation of the structure is prevented. Therefore, even if the tower material to be lifted is heavy, the construction work of the columnar tower can be performed more stably.

[Brief description of the drawings]

FIG. 1 is a front view of a tower construction machine according to the present invention.

FIG. 2 is a side view of the tower construction machine according to the present invention.

FIG. 3 is a plan view of a steel tower construction machine according to the present invention.

FIG. 4 is a view showing a state where a guide rail and a mast are supported by a steel tower.

FIG. 5 is a flowchart showing steps of a tower construction by the tower construction machine according to the present invention.

FIG. 6 is a view showing a “leg construction step” in a construction step of constructing a tower by the tower construction machine according to the present invention.

FIG. 7 is a diagram illustrating a [pylon construction machine installation process].

FIG. 8 is a view showing a process of constructing a steel tower by a [steel tower material replenishing step] and a [steel tower construction machine lifting step].

FIG. 9 is a view showing a process of constructing a steel tower by a [steel tower material replenishing process] and a [steel tower construction machine lifting process].

FIG. 10 is a view showing a process of constructing a steel tower by a [steel tower material replenishing process] and a [steel tower construction machine lifting process].

FIG. 11 shows the construction of a tower construction machine provided with an elevating work scaffold and a temporary storage space for materials in the process of constructing a tower by the [tower construction process] and the [tower construction process]. FIG.

FIG. 12 is a view showing a process in which a mast provided in the tower construction machine according to the present invention rises with respect to the tower;
(A) is a diagram showing a state where both the upper lock pin and the lower lock pin are inserted into the grooves of the guide rail, (b) is a diagram showing a state where the upper lock pin is removed from the grooves of the guide rail, and (c). ) Shows a state in which the mast has been raised with respect to the steel tower by extending the main cylinder,
(D) is a view showing a state in which the lower lock pin is removed from the groove of the guide rail, and (e) is a view showing a state in which the climbing slider is raised with respect to the steel tower by contracting the main cylinder. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tower construction machine 2 Tower 2a Tower material 3 Guide rail (elevating means) 4 Mast 5 Climbing slider (elevating means) 6 Work yard 7 Iron tower material lifting machine (lifting means) 8 Jib crane (lifting means) 10 Backstay cable (Tensile material) 11 Tensile force adjustment device 12 Ground (support plate)

Claims (3)

[Claims] At least one set of masts arranged at a position sandwiching a tower to be constructed and supported by the tower,
Elevating means for elevating the set of masts so that the upper end thereof is higher than the steel tower being constructed, a work yard is provided at an upper end of the set of masts, A tower construction machine characterized in that a lifting means for lifting a tower material to be added on the tower is horizontally movably provided. 2. A tower construction method for constructing a tower by the tower construction machine according to claim 1, wherein a tower material constituting a lower end portion of the tower to be constructed is first erected on a support board. Next, the tower construction machine is supported by the tower material such that at least one set of masts sandwiches the standing tower material. Next, the set of masts is moved to the upper end by the raising means. The work yard is raised above the steel tower material by raising the portion so as to be higher than the steel tower material; and after the lifting step, the steel tower material is lifted by the lifting means on the work yard. And a replenishing step of lifting and adding the next tower material to the steel tower material a predetermined number of times. 3. The tower construction method according to claim 2, wherein when the tower is constructed by successively adding the tower materials, a tension member is drooped from a predetermined location on the work yard and a tension member is pulled on the support board. A method for constructing a steel tower, comprising: providing a force adjusting device; and fastening the tension member to the tensile force adjusting device.