JP2002106207A - Steel tower raising construction method by slide steel structure and device for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of construction capable of raising a steel tower in safety without placing a supporting wire, by mounting a frame not needing a height reaching the raising height of the steel tower, on the foundation. SOLUTION: In this steel tower raising construction method by lifting the steel tower by separating a lower end of a leg body of the steel tower from the foundation and connecting a leg material to the lower end of the leg body, the frame 2 of a specific height is mounted on the foundation in a tower body, a vertically movable outer frame 6 is mounted along an outer periphery of the frame 2, plural arms 7 are mounted toward a main pole member 8 of the steel tower 6 from the outer frame 6, the main pole member 8 of the steel tower 5 is grasped by tips of the arms 7 to raise the outer frame 6 to a predetermined height, a main pole member 24 of a next knot is inserted and connected into a clearance between the main pole member 8 of the steel tower 5 and the foundation, the grasping of the main pole member 8 by each arm 7 is released to lower the outer frame 6, and this procedure is repeated to raise the steel tower by a desired height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for raising a power transmission tower and other suitable towers, which eliminates the difficulty of securing a work site in urbanization of a tower construction site and the like. It is.

[0002]

2. Description of the Related Art Conventionally, transmission towers have been raised by constructing a temporary route and replacing towers. However, when it is difficult to secure a site for construction, a transmission tower that is one size larger than the raised tower is used. The method of wrapping is adopted. In addition, branch lines are taken on all sides in order to prevent falling due to the force of cross wind or the like when raising. Furthermore, if land cannot be secured, these branches will not be taken and can be implemented only with a tower with low horizontal force. Therefore, to raise these, a steel pole for hydraulic climbing is installed in the tower, a beam is provided at the tip of the tower in the diagonal direction of the tower, and the lower member is sequentially raised while gripping the tower main pillar and raising it. Hydraulic climbing is performed to the required height when mounted.

[0003]

However, in this raising method, since a full load is applied to the iron column for hydraulic climbing, it depends on the strength of the iron column, and it is required to use an iron column having an integrated welding structure. Because of this, the size is limited, and raising the tower with a heavy load is insufficient in strength. Furthermore, since the beam material of the tower holding part penetrates from the inside of the tower to the outside, it takes time to remove.

The present invention has been made in view of the above points. In raising various towers, a base is provided on a foundation in the body of the tower and an outer frame which can be moved up and down around the outer periphery of the base is provided. By grasping the main pillar of the tower with multiple arms of the frame and raising or lowering the outer frame, the height up to the height of the tower as in the conventional hydraulic climbing is unnecessary, and the branch line is An object of the present invention is to provide a method and a device capable of safely raising a tower without stretching.

[0005]

According to the first aspect of the present invention, there is provided a method for raising a steel tower in which a lower end of a main pillar of a steel tower is separated from a foundation, a steel tower is lifted, and a leg is connected to a lower end of the main pillar. A pedestal of a certain height is provided on the foundation in the tower body, an outer frame that can be raised and lowered along the outer circumference of the pedestal is provided, and a plurality of arm bars are provided from the outer frame toward the main column material of the tower, The main pillar of the tower is gripped by the tips of these arms, then the lower end of the main pole of the tower is separated from the foundation, and the outer frame is raised to a certain height to lift the tower.

In this state, the main pillar material of the next section is inserted into the gap between the main pillar material of the tower and the foundation to connect with the existing main pillar material of the steel tower, and each of the above-mentioned arms is gripped by the main pillar material. Release the outer frame, lower the outer frame, hold the lower main pillar at the tip of each arm of the outer frame again, raise the outer frame, and lift the tower, repeat these operations to repeat the tower to the required height. The steel tower was raised by a slide iron structure. When the main column material of the tower is gripped by the tips of the plurality of arms, and then the lower end of the main column material of the tower is separated from the foundation, all horizontal forces are shared by the gantry,
It is transmitted to the foundation via the gantry. In addition, the main pillars of the next section are fixed to the main pillars of the tower, and the lower ends of these main pillars are fixed to the temporary legs fixed to the foundation. There is no danger that the tower will fall over.

According to a second aspect of the present invention, there is provided a method of raising a steel tower by separating a lower end of a main pillar of a steel tower from a foundation, lifting the steel tower, and connecting a leg to the lower end of the main pillar. Is provided with a fixed height, an outer frame that can be raised and lowered is provided along the outer periphery of the mounted frame, and a plurality of pairs of upper and lower arms are provided from the outer frame toward the main pillar of the steel tower. The main pole of the tower is gripped by the tip of the pair of arms, then the lower end of the main pole of the tower is separated from the foundation, the outer frame is raised to a certain height, and the tower is lifted. Insert the main pole material of the next section into the gap with the foundation, connect it to the existing main pole material of the tower, release the grip of the main pole material of each arm, lower the outer frame, and perform these operations Was repeated to raise the tower to the required height.

According to a third aspect of the present invention, there is provided an apparatus for raising a steel tower in which a lower end of a main pillar of a steel tower is separated from a foundation, and a tower is lifted and leg members are connected to the lower ends of the main pillars. Is provided at a fixed height, an outer frame is provided along the outer periphery of the pedestal that can be raised and lowered, and a plurality of pairs of upper and lower arms are provided from the outer frame toward the main pillar of the tower. Providing a gripping device for gripping the main column material of the steel tower at the tip of the gold, provided with means for raising and lowering the outer frame along the outer periphery of the gantry,
A tower raising device using a sliding steel structure was used. Since the downward force is always applied to the outer frame by its own weight, a wire having one end fixed to the outer frame is folded back at the top of the gantry,
The outer frame can be moved up and down by winding or unwinding with an electric motor or the like provided on the ground.

According to a fourth aspect of the present invention, there is provided a tower raising device for separating a lower end of a main pillar of a tower from a foundation, lifting the tower, and connecting legs to the lower ends of the pillars. Is provided at a fixed height, an outer frame is provided along the outer periphery of the pedestal that can be raised and lowered, and a plurality of pairs of upper and lower arms are provided from the outer frame toward the main pillar of the tower. The slide is provided in such a manner that the gold is expandable and contractable, and a gripping device for gripping a main pillar of the steel tower is provided at a tip end of each of the plurality of pairs of arms, and means for raising and lowering the outer frame along the outer periphery of the gantry is provided. A tower raising device using a steel structure was used.

[0010] The invention of claim 5 is the third aspect of the present invention.
The apparatus according to item 4 or 4, wherein a plurality of rollers are respectively provided on upper and lower portions of a sliding surface of the outer frame with the gantry, and when the outer frame moves up and down, these rollers rotate while the outer frame rotates. The tower was raised by a slide iron structure. These rollers share only the horizontal load. In addition, these rollers are attached to the upper and lower sides of the outer frame, respectively, to share the bending moment generated by the horizontal load by reducing the vertical distance between the upper and lower rollers, and that the outer frame can be raised and lowered smoothly. There is no risk of the tower falling.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show an apparatus used in the method of the present invention. As shown in FIG. 1, this apparatus is installed on a foundation in a steel tower body. Here, the case of the mat foundation 1 will be described. A base 2 having a fixed height in a box shape is provided with anchor bolts 3 embedded in the mat foundation 1 to form the mat foundation 1.
On top. The pillars 4 at the four corners of the gantry 2 are adjustable in height. Therefore, the height is determined according to the size of the tower 5 to be raised. As shown in FIG. 2, a rectangular cylindrical outer frame 6 is fitted to the outside of the gantry 2. The outer frame 6 can move up and down along the column 4.

A pair of upper and lower arms 7 are provided horizontally from the four corners of the outer frame 6 in the direction of the main pillar 8 of the tower 5. Each arm 7 is connected by a vertical member 9 and a horizontal member 10. Each arm 7 is horizontally expandable and contractible, and its length is determined according to the size of the steel tower 5 to be raised.
Also, as shown in FIGS. 3 and 4, a main pillar holding fixture 1 for holding the main pillar 8 of the steel tower 5 is provided at the tip of the arm 7.
1 is provided, and the main pillar holding metal 11 is rotatable and fixable so as to be angled with respect to the horizontal arm 7. Therefore, the angle with respect to the arm 7 can be adjusted according to the degree of inclination of the main pillar 8 to be gripped.

The arm 7 and the main column holder 11 are
As shown in FIGS. 3 and 4, each arm 7 is divided into a movable part 7 a and a fixed part 7 b, a horizontal elongated hole 12 is formed in the fixed part 7 a, and a number of bolts 13 penetrating through the movable part 7 a are used. The nuts 14 screwed to the ends of the bolts 13 through the elongated holes 12 are tightened and fixed. The nuts 14 are loosened to reduce the protrusion length of the movable portion 7a relative to the fixed portion 7b. By adjusting, the entire length of the arm 7 can be adjusted. The main column holder 11 provided at the end of the movable portion 7 is rotatably supported by bolts 15. Thereby, the horizontal arm member 7 can be rotated and fixed so as to be angled. In addition, the main column material gripping tool 11 is composed of two angle members to form the main column material 8.
Is held between bolts and nuts 16.

As shown in FIGS. 5 and 6, the sliding surfaces of the four pillars 4 at the four corners of the gantry 2 and the outer frame 6 are provided with infinite infinity at the upper and lower surfaces of the four corners of the outer frame 6 at right angles. A total of 16 roller fittings 17 (not shown), which are composed of a number of rollers arranged in a track, are provided. Each of these roller brackets 17 can be finely adjusted in the horizontal direction by adjusting bolts 18, and has a sliding surface, that is, a gap between a surface of each column 4 of the gantry 2 and an opposing surface of the outer frame 6. By adjusting the width and appropriately tightening the adjustment bolts 18, rattling or deformation of the outer frame 6 at the time of lifting and lowering can be suppressed.

Further, as shown in FIG.
A beam 19 is fixed to the top of the wire, a wire 22 is hooked through a pulley 20 provided on both sides of the beam 19 and a pulley 21 provided on the upper end of the outer frame 6, and one end thereof is fixed to the upper end of the outer frame 6. The other end of the wire 22 is locked to a drive motor 23 provided on the mat foundation 1. As shown in FIG. 1, the mat foundation 1 includes a plurality of temporary leg members 25 supporting a main column member 24 of the next section, which is a steel tower insertion member, at predetermined positions in advance in accordance with various tower body widths. Are provided and these temporary legs 25
Is embedded in the mat foundation 1.

Next, the method for raising a steel tower according to the present invention will be described using these apparatuses. First, as shown in FIG. 8, a vertical load lifting device (hydraulic climbing) 26 is installed at the center of the gantry 2 in the body of the steel tower 5, and the upper end of the hydraulic climbing 26 is attached to the main pillar 8 on the upper part of the steel tower 5. Fixed to. Then, the drive motor 23 is operated to lower the outer frame 6 to an appropriate position below the gantry 2, and extend the upper and lower arms 7 of the outer frame 6 to the main column 8 of the steel tower 5, and The main pillar 8 is gripped by the material gripper 11. Then, the connection bolts 27 at the lowest section of the main pillar 8 of the steel tower 5 are removed, and the lower part of the main pillar 8 is cut off from the mat foundation 1. And hydraulic climbing 2
6 is driven to raise the steel tower 5, and at the same time, the drive motor 23 is driven in accordance with the rising speed, and the outer frame 6 is raised to the upper portion of the gantry 2. Thereby, the tower 5 also rises.
In this case, the hydraulic climbing 26 rises by receiving a vertical load, the outer frame 6 receives a horizontal load, and receives the load by sharing the load.

In this way, as shown in FIG.
Is raised to a certain height,
Is inserted between the mat foundation 1 and the lower end of the main pillar 8, and the lower part of the main pillar 8 and the upper part of the temporary leg 25 are connected and fixed. Then, as shown in FIG. 10, the belly material 29 is also attached. Then, the main column holder 11 of each arm 7 is detached from the main column 8, and each arm 7 is contracted, and then the drive motor 23 is driven to drive the outer frame 6.
Is lowered to an appropriate position, and as shown in FIG. 11, the upper and lower arms 7 are extended, and the main pillar 24 of the next section connected to the main pillar 8 is gripped by the main pillar gripper 11. Then, the above operation is repeated to raise the steel tower 5 to a predetermined height.

In the above embodiment, four columns 4 of the gantry 2 are prepared. However, the present invention is not limited to this, and the method of the present invention can be implemented by providing a plurality of columns. Further, in the above embodiment, the lifting load of the steel tower is received by the hydraulic climbing 26,
Although the horizontal load is received by the outer frame 6 and the lifting device capability of the outer frame 6 is defined as the frame weight, if the lifting device capability is increased, the hydraulic climbing 26 is not used and the gantry 2 and the outer frame 6 And a horizontal load.

[0019]

According to the first or third aspect of the present invention, a gantry is provided in a steel tower to be raised, and an outer frame is provided along the outer periphery of the gantry so as to be movable up and down, and projects substantially horizontally from the outer frame. Since the main pillar of the tower is gripped by the plurality of arms and the outer frame is moved up and down to raise the tower, it is only necessary to install the equipment inside the tower and not to install it outside. Therefore,
Take no place. In addition, the outer frame is raised and lowered along the outer circumference of the gantry, and the main column material of the next section is connected under the main column material of the raised tower, so that the height of the tower is raised as in the conventional hydraulic climbing Therefore, the size of the apparatus can be reduced. In addition, a frame and an outer frame are provided at the center of the tower to be lifted, and the steel tower to be lifted with the arm of the outer frame is gripped, so that the horizontal load of the tower is raised and lowered to the frame,
This is transmitted to the foundation for processing, and the tower can be prevented from tipping over due to horizontal force.

Further, the invention of claim 2 provides the above-mentioned claim 1.
In addition to the effects of the item, arm bars are protruded from the upper and lower parts of the outer frame that can move up and down along the outer circumference of the gantry, and the upper and lower arms hold the main column material of the steel tower to raise the height. Therefore, the tower can sufficiently withstand a horizontal load, and the tower can be raised more stably.

Further, the invention of claim 4 is the same as the above-mentioned claim 3.
In addition to the effect of the item, since each arm protruding horizontally from the outer frame is stretchable, even if the main pillar of the steel tower spreads downward, It can be gripped and is highly versatile. According to a fifth aspect of the present invention, in addition to the effects of the third or fourth aspect of the present invention, a roller bracket is provided on a sliding surface between the gantry and the outer frame. Generates a large overturning moment in the steel tower, but since this stress can be raised and lowered while sharing the stress with the roller fittings as a compressive force, the apparatus becomes extremely simple and can be lifted with good stability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a gantry is attached below a steel tower in an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which an outer frame is attached to a gantry provided below a steel tower in the embodiment of the present invention.

FIG. 3 is a plan view of the arm and the main column holder in the embodiment of the present invention.

FIG. 4 is a side view of the arm bar and the main column holder in the embodiment of the present invention.

FIG. 5 is a partial plan view of a sliding portion between the gantry and the outer frame in the embodiment of the present invention.

FIG. 6 is a partial cross-sectional side view of a slide portion between the gantry and the outer frame in the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing an elevating / lowering device for an outer frame in the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a first step of the raising method according to the embodiment of the present invention.

FIG. 9 is an explanatory view showing a second step of the raising method according to the embodiment of the present invention.

FIG. 10 is an explanatory view showing a third step of the raising method according to the embodiment of the present invention.

FIG. 11 is an explanatory view showing a fourth step of the raising method in the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mat foundation 2 Base 4 Column 5 Steel tower 6 Outer frame 7 Armrest 7a Movable part 7b Fixed part 8 Main pole material 11 Main pole material gripping tool 17 Roller bracket 18 Adjustment bolt 22 Rope 23 Drive motor 24 Next main pole material 25 Temporary Leg material 26 hydraulic climbing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuharu Yamauchi 1-2 Kasanouchi Kita-Kita, Fukushima City, Fukushima Prefecture Tohoku Electric Power Co., Inc. Fukushima Technical Center (72) Inventor Toru Kodama Sakurashita, Fukushima City, Fukushima Prefecture 1-2 Fukushima Technology Center, Tohoku Electric Power Co., Inc. (72) Inventor Yasuo Taisai 1-2 Kasanouchi Kita-Kita, Sakura-shi, Fukushima City, Fukushima Pref. Inventor Minoru Shizukuishi 554 Yutaka Tadahara, Natori City, Miyagi Prefecture Inside the U.R.TEC Transmission Construction Center (72) Inventor Yoshihiro Ogata 35-1 Osamu Osamu Fukushima, Fukushima City, Fukushima Pref. Person Tadayoshi Nagasawa 5 Nishihara, Shimonogo, Iwanuma City, Miyagi Prefecture Inside the Equipment Management Center of U-Tech Power Transmission Construction Center (72) Inventor Takumi Isayama Shinjuku-ku, Tokyo Inn 1 chome No. 14 Nasu Electric Iron Works within Co., Ltd. (72) inventor Sakuma St. Noriyuki Shinjuku-ku, Tokyo Shinjuku 1 chome No. 14 Nasu Electric Iron Works Co., Ltd. in

Claims (5)

[Claims] 1. The lower end of a leg of a steel tower is separated from a foundation,
In the method of raising a steel tower, which raises a steel tower and connects a leg material to the lower end of these legs, a pedestal of a fixed height is provided on a foundation in the tower, and an outer frame that can be raised and lowered along the outer periphery of the pedestal is provided. A plurality of arms are provided from the outer frame toward the main column material of the tower, the main column material of the tower is gripped by the tips of these arm bars, the outer frame is raised to a certain height, and the tower is lifted. ,
Insert the main pole material of the next section into the gap between the main pole material and the foundation of this tower, connect them, release the grip of the main pole material of each arm, lower the outer frame, and A method of raising a steel tower by using a slide iron structure, characterized by repeatedly raising the steel tower to a required height. 2. The leg lower end of the tower is separated from the foundation,
In the method of raising a steel tower, which raises a steel tower and connects a leg material to the lower end of these legs, a pedestal of a fixed height is provided on a foundation in the tower, and an outer frame that can be raised and lowered along the outer periphery of the pedestal is provided. A plurality of pairs of upper and lower arms are provided from the outer frame toward the main column material of the tower, and the outer frame is held to a certain height by gripping the main column material of the tower with the tips of the plurality of pairs of arms. Lift up the tower, insert the main pillar material of the next section into the gap between the main pillar material of this tower and the foundation, connect it with the main pillar material of the tower, and release the grip of the main pillar material of each arm And lower the outer frame,
The method of raising the tower to the required height by repeating these operations. 3. A tower raising device for separating a lower end of a main pillar of a tower from a foundation, lifting the tower, and connecting a leg to the lower end of the main pillar, wherein a tower having a fixed height on a foundation in the tower body is provided. Provide a gantry, provide an outer frame that can be raised and lowered along the outer circumference of the gantry, provide a plurality of pairs of upper and lower arms toward the main column material of the steel tower from the outer frame, An apparatus for raising a steel tower by a slide iron structure, comprising: a gripping device for gripping a main pillar of a steel tower at a tip end; and means for raising and lowering the outer frame along the outer periphery of a gantry. 4. A tower raising device for separating a lower end of a main pillar of a tower from a foundation, lifting the tower, and connecting a leg to the lower end of the main pillar, wherein a tower having a fixed height on a foundation in the tower body is provided. Provide a gantry, provide an outer frame that can move up and down along the outer circumference of the gantry, provide a plurality of pairs of upper and lower arms toward the main column material of the steel tower from this outer frame, make each of these arms elastic A steel tower with a slide iron structure, further comprising a gripping device for gripping a main pillar of the steel tower at a tip end of the arm, and a means for raising and lowering the outer frame along the outer periphery of the gantry. Raising device. 5. A plurality of rollers are respectively provided on upper and lower portions of a sliding surface of the outer frame with the gantry, and when the outer frame is moved up and down, the outer frame moves up and down while these rollers rotate. The steel tower raising device using the slide iron structure according to claim 3 or 4, wherein the steel tower raising device is configured as follows.