JP3345386B2 - Relay type elevated construction method for steel towers and elevated guide mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of connecting an existing steel tower to a lower part of a tower, for example, when a tall structure is to be installed below an overhead line of an existing power transmission route or near a steel tower. Separate from the upper part, lift the upper part of the tower with a crane,
The present invention relates to a construction method and a guide mechanism for ascending, in which a tower relay section for ascending (increase) is added in an interrupted manner between the tower and a lower part of the tower.

[0002]

2. Description of the Related Art FIG. 18 schematically illustrates an example of the above-mentioned conventional construction method. In this method, first, a temporary tower column 60 having a predetermined height for lifting a steel tower is constructed around an existing steel tower 50. Then, a guide mechanism 70 that guides the lifting movement of the existing steel tower 50 is mounted between the opposing corner pillars 51 and 61 (four each in total) of the existing steel tower 50 and the temporary tower pillar 60. The guide mechanism 70 has a configuration in which a guide roller 72 slidably in contact with the corner post 51 is attached to the tip of a guide arm 71 projecting from each corner post 51 toward each corner post 61.
A plurality of hydraulic jacks 62 for lifting the existing tower 50 are attached to the temporary tower 60.

In order to raise the existing tower 50, as shown in the figure, the lower end of the existing tower 50 is connected to a leg 5 buried underground.
2, the existing steel tower 50 is lifted to a desired height by a group of hydraulic jacks 62 (not shown), and between the lower end and the upper end of the leg 52, Assemble the tower relay section.

FIG. 19 is a schematic view of another conventional construction method. According to this method, first, a base 53 for extending a tower is constructed around the periphery of an existing tower 50, and a hydraulically driven tower crane 80 used for construction of a high-rise building or the like is provided in an inner space of the existing tower 50. Is installed. Tower crane 8
At 0, a plurality of supporting wires 81 are stretched to reliably support the existing tower 50 so as not to tilt. Then
The upper part of the existing steel tower 50 is fixed to the tower crane 80, and then separated into the lower tower part 50A and the upper tower part 50B. After that, the tower crane 80 is gradually increased, and the tower
B is lifted up to the illustrated height position. Next, the lower part 50A of the tower is lifted by the height to be added. Then, the lower end of the tower lower part 50A is connected to the base 53 for extension, and the upper end is set to the upper part 50 of the tower.
If each is connected to B, the work for elevating the existing steel tower 50 is completed.

[0005]

The conventional method shown in FIG. 18 has many disadvantages as described below. a) The construction of the temporary tower 60 and the removal after use have required a great deal of expense and construction time. b) Transporting the temporary tower 60, which is no longer required after use, requires a lot of labor and expenditure, especially in remote mountainous areas. c) It is often difficult to secure land for the construction of temporary tower columns. d) In the case where the construction ground of the steel tower has an inclination or a step, the merit of repeatedly using the temporary tower columns having the standard dimensions cannot be obtained. e) It is difficult to operate a plurality of hydraulic jacks in an interlocking manner, and it is also difficult to increase the operating efficiency of the hydraulic jacks by increasing the operating stroke.

The conventional method shown in FIG. 19 also has the following disadvantages. f) In many cases, it is not possible to secure a considerably large site for stretching the supporting wire 81. g) Following the gradual increase in the height of the tower crane 80, the plurality of supporting wires 81 also require cumbersome work of sequentially increasing their lengths. h) At that time, it is also difficult to adjust the tension between the support wires 81.

Accordingly, an object of the present invention is to provide a lot of disadvantages of the above-mentioned conventional construction method, that is, a great deal of difficulty associated with the difficulty of securing land and extending work for constructing a temporary tower column and extending a supporting wire. We have developed a relay tower type elevated construction method and elevated guide mechanism that can almost eliminate problems such as expenditure, delay of construction period, low speed of lifting work of existing steel tower by hydraulic cylinder and difficulty of work. To offer.

[0008]

In order to achieve the above-mentioned object, a method of relaying a tower according to the present invention, which comprises:
A tower connecting portion C for high elevation is interposed between a tower base A, which is a lower layer of the steel tower 00, and a tower main body B extending above the tower base A. A step of installing a lifting device D that lifts and holds the tower body B to a desired height in the empty space, and a step of adding a tower junction C upward from the upper end of the tower base A to above A step of assembling a guide mechanism E for guiding the lifting movement of the tower body B between the tower relay section C and each of the corner pillars 1 and 2 of the tower body B;
The step of separating from the tower base A and the tower main body B are supported by the guide mechanism E, and the lifting device D is used for the tower relay section C.
And the step of connecting the lower end of the lifted tower body section B to the upper end of the tower relay section C, and the step of removing the used lifting apparatus D, guide mechanism E, etc. It is characterized by including. Then, a step of adding a temporary guide tower column F of an arbitrary height, which guides the lifting movement of the tower body section B, may be included at the upper end of the tower relay section C.

The guide mechanism for elevating a tower according to the present invention is used in the above-mentioned relay type elevating method, and includes a tower relay installed at each corner post 1 of the tower main body B and opposed to the outside thereof. A guide arm 12 protruding toward each corner post 2 of the section C and having a guide roller 11 attached to the tip thereof, and is detachably attached to the inner surface of each corner post 2 of the tower relay section C, A guide roller 13 for slidingly contacting the guide roller 11. The guide rail 13 may be configured to sandwich the corner post 2 in cooperation with the fixing brackets 15 arranged at a plurality of locations in the longitudinal direction.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a power transmission tower will be described below with reference to FIGS. FIG. 1 shows an existing steel tower 100 in front of Takakami,
Shows the elevated tower 200 after elevated. As shown in FIG. 1 and FIG. 13, the elevated tower 200 temporarily separates the tower base A, which is the lower layer of the existing tower 100, from the tower body B connected to the upper side thereof, There is provided a configuration in which a tower relay section C for elevation is connected in an interrupt manner between the two. In this case, the existing steel tower 100 is unavoidably constructed from the topography of the surrounding area and straddles the upper and lower steps of the stepped ground G.

Here, the outline of the procedure of the Takagami method will be described in advance. First, as shown in FIG.
A lifting device D that lifts and holds the tower main body B to a desired height, in this case, a tower crane, is installed in the space inside the tower 0. Next, as shown in FIGS. 3 and 4, a tower junction C is added from the upper end of the tower base A upward.
In the meantime, a guide mechanism E for guiding the lifting movement of the tower main body B is installed between each corner post of the tower relay section C and the tower main body B. Next, as shown in FIGS. 4 and 5, the tower body B is separated from the tower base A, and the tower body B is connected to the guide mechanism E.
Is lifted by the lifting device D by the height of the tower junction C. This lifting step is performed several times sequentially according to the height of the tower. Then, if the lower end of the lifted tower main body B is connected to the upper end of the tower relay section C, the ascending work is completed. As shown in FIGS. 6, 8 and the like, a temporary guide tower column F1, F2, etc. having an arbitrary height is provided at the upper end of the tower relay section C to guide the lifting movement of the tower body section B (F). Should be added.

Next, the respective constituent members of the tower base A, the tower body B, the tower relay section C, and the temporary guide tower column F will be described. Tower base A and tower body B (that is, existing tower 1
00) have four corner posts 1 each. The tower relay section C also has four corner pillars 2.

At the intermediate height position of the tower body B, a tower support member H, whose form is shown in the lower part of FIG. 14, is temporarily attached during construction. At the lower end of the tower support member H, FIG.
The pin connection type universal joint J shown in
The connection is performed according to the procedure described below. J1 is the lower half,
J2 is the upper half.

The temporary guide tower column F, which serves as an assistant for ensuring the safety of the lifting movement of the tower body B, also has four corner pillars 3, each of which has a lower end connected to a tower relay section. C is connected to the upper end of each corner post 2.

Next, the lifting device D of this embodiment is a tower crane having a known structure used for various construction works. Articulated tower D built into tower base D1
2 is not shown, but the wire connected to its lower end is wound up by a winch. At the upper end of the articulated tower D2, there is a universal joint J
Is attached.

Next, the configuration of the guide mechanism E of this embodiment will be described with reference to FIGS. As shown in FIG. 14, the guide mechanism E starts from each corner post 1 of the tower main body B to each corner post 2 of the tower relay section C opposed to each outside thereof.
And a guide rail 13 (see FIGS. 15 and 16) for slidingly contacting the guide roller 11.

The guide arm 12 is detachably fixed to the tower main body B in the state shown in FIG. At the tip of each guide arm 12, FIG.
As shown in FIG. 5, a bearing member 14 for assembling the guide roller 11 is attached. Although not shown, two guide rollers 11 are attached to the bearing member 14 vertically in a vertical line.

As shown in FIGS. 15 and 16, the guide rail 13 is detachably attached along the inner side surface of the angled pillar 2 of the tower relay section C.
That is, a guide rail 1 of a predetermined length having a T-shaped cross section.
Reference numeral 3 denotes that both side edges 13a are bent at 45 degrees to prevent the rollers from deviating and to be brought into close contact with the inner side surface of the corner post 2.

In order to removably fix the guide rail 13 to the corner post 2, a plurality of fixing brackets 15 are used. The fixing bracket 15 has a form such that the band plate is bent into an L shape, and is configured so that the state in which the corner post 2 is sandwiched in cooperation with the guide rail 13 is fixed by the fastening bolt / nut 16. are doing.

Next, the procedure of the construction method for increasing the existing tower 100 of FIG. 1 to the form of the elevated tower 200 of FIG. 13 will be described with reference to FIG.
This will be described with reference to FIGS. First, the existing tower 10
The reinforcement work for the base portion (not shown) buried in the ground and the tower base A, which is described below, is completed in advance as necessary. Thereafter, as shown in FIG. 2, a tower crane D for lifting and holding the tower body B to a desired height is installed on the ground G inside the tower of the existing steel tower 100.

At the intermediate height position of the tower body B, a tower support member H (see FIG. 14) is attached so that the tower body B can be stably supported by the tower crane D. .

As is well known, the extension type tower D2 of the tower crane D is gradually raised, and when the universal joint J at the upper end reaches the lower end of the tower support member H, the universal joint J is attached to this lower end. By connecting J, the tower body B is securely supported by the tower crane D.

Further, as shown in FIG. 2, from the upper end of the tower base A to the upper side thereof, a tower junction C having a desired height dimension is provided.
First, the lower part C1 is added. And the tower relay section C
A guide mechanism E for guiding the lifting movement of the tower body B is assembled between each pair of corner pillars 1 and 2 of the tower body B facing each other.

That is, the guide rail 13 is attached to the inner side surface of each corner post 2 of the tower relay section C as described above. On the other hand, a guide arm 12 with a guide roller 11 is provided at two upper and lower locations at a predetermined distance near the lower end of the tower body B,
Attach as described above.

Subsequently, as shown in FIG. 3, an upper portion C2 is added to a lower portion C1 of the tower junction C to form a tower junction C having a predetermined height as shown in FIG. I do. The guide rail 13 is also attached to each corner post 2 of the upper part C2.

Thereafter, as shown in FIG. 4, the tower base A and
Separate from the tower body B (see the dotted circle). The flexible joint J serves to prevent a horizontal moment applied to the tower body B by wind pressure, transmission line tension, or the like from directly reaching the tower crane D.

After the separation between the tower base A and the tower body B is completed, the first lifting operation of the tower body B is performed as described above, as shown in FIG. At that time, the tower relay section C
As will be easily understood from FIG. 5, it also serves as a guide tower column for guiding the upward movement of the tower body B.

Subsequently, the tower body B is lifted for the second time. As understood from FIG. 5, a portion serving as a guide tower column for guiding the ascent of the tower body B is performed. It is necessary to add a new one. Therefore, as shown in FIG. 6, a temporary guide tower column F having a predetermined height is provided at the upper end of the existing tower relay section C.
Add one. Then, a guide rail 13 is also attached to each corner post 3.

Thereafter, as shown in FIG. 7, the second lifting of the tower body B is performed. Thereafter, in the same manner as above,
The third lifting of the tower body B is performed as shown in FIGS. 8 and 9, and the fourth lifting is performed in FIGS. 10 and 11.
Perform as shown in At this time, the lower end of the tower main part B reaches the height position of the upper end of the tower relay part C. F2 and F in the figure
Numeral 3 denotes temporary guide tower pillars to be newly added.

After the tower body B has been lifted to the desired height, the lower end of the tower body B is completely aligned with the upper end of the tower junction C as shown in FIG. If the lower end of the main part B is connected to the upper end of the tower relay part C, the ascending construction of the existing steel tower 100 is completed.

When the construction of the elevated tower 200 is completed, the used tower crane D, the temporary guide tower column F, the tower supporting member H, etc. are removed. FIG. 14 shows an example of a removal operation state of the tower support member H. In the figure, 17 is a pulley, 18 is a winch, and 19 is a wire.

The used guide arm 12, guide rail 13 and the like attached to the corner pillars 2 and 3 can be easily removed, so that they can be used repeatedly for the work of raising another steel tower. The same applies to the temporary guide tower column F.

In the above embodiment, the lifting device D is
A tower crane of a type in which unit units constituting the extension tower D2 are sequentially extended by a winch and a wire to increase the height is used. Of course, various types of well-known types are used depending on the situation of individual works. The most suitable type may be selected from the lifting devices and used.

[0034]

As is apparent from the above description, the relay tower-type elevating method and the elevating guide mechanism of the steel tower according to the present invention have the following practically excellent effects. (A) In addition to the original role of raising the tower, the tower relay section also serves as a guide tower post that guides the lifting of the tower. (B) Therefore, it is possible to eliminate the uneconomical problem of temporarily constructing a temporary tower column for lifting guide of the tower, which is required in the conventional method, around the outer circumference of the existing tower. (B) The construction can be performed even in a place where the construction site for the temporary tower pillar cannot be secured. (C) The construction cost and construction period for the production, transportation and construction (including the foundation work of the tower) and removal of temporary tower pillars and the necessity of extra cost and time, etc., for negotiations for securing land, etc. It can be significantly reduced. (D) When the construction ground of the steel tower is an inclined ground, the temporary tower column does not make use of the merit of repeated use according to the standard dimensions, but the method of the present invention is hardly influenced by the inclination of the ground. (E) As a lifting device for the tower main body, if a device of a wire winding type by a winch is adopted, the working efficiency can be far improved as compared with a device using a hydraulic cylinder. (F) The guide rail that guides the lifting movement of the tower can be used repeatedly, and can be quickly and reliably attached to and detached from the corner post of the tower. (G) Unlike a construction method requiring a wire for supporting an existing steel tower that has been lifted, extremely troublesome operations such as securing a wide area, gradually extending a wire, and adjusting tension can be omitted.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a front view of an existing steel tower.

FIG. 2 is a front view showing a state where a lifting device for a steel tower is installed and a lower part of a tower junction is connected to an upper end of a tower base;

FIG. 3 is a front view showing a state in which an upper part has been connected to a lower part of the tower relay unit.

FIG. 4 is a front view showing a state where the tower base and the tower body are separated from each other;

FIG. 5 is a front view showing a state where the first lifting of the tower body is completed.

FIG. 6 is a front view showing a state in which the first temporary guide tower post is added to the upper end of the tower relay unit.

FIG. 7 is a front view showing a state where the second lifting of the tower body has been completed.

FIG. 8 is a front view showing a state in which the second temporary guide tower post is extended.

FIG. 9 is a front view showing a state where the third lifting of the tower body is completed.

FIG. 10 is a front view showing a state where the third temporary guide tower pillar has been extended.

FIG. 11 is a front view showing a state where the fourth lifting of the tower body is completed.

FIG. 12 is a front view showing a state in which the lower end of the tower main body part that has been lifted has been connected to the upper end of the tower relay part.

FIG. 13 is a front view of the completed high-rise tower.

FIG. 14 is an explanatory view of a situation in which the used tower support member is being removed.

FIG. 15 shows a guide arm constituting a guide mechanism;
It is the top view which showed the mutually assembled | attached state of the guide roller and the three guide rails attached to the corner post of a tower relay part.

FIG. 16 is a partial front view of the corner post to which the guide rail is attached, as viewed from the inside, and a partial side view, as viewed from the outside.

17 is a partial side view of the attachment portion of the flexible joint as viewed from two orthogonal directions. FIG.

FIG. 18 is an explanatory view of a conventional tower construction method.

FIG. 19 is an explanatory view of another conventional method of elevating a steel tower.

[Explanation of symbols]

 100 Existing towers 200 High-rise towers A Tower base B Tower main body C Tower junction D Tower crane (lifting device) D1 Tower base D2 Articulated tower E Guide mechanism F Temporary guide tower column G Ground H Tower support member J Flexible joint J1 Lower half J2 Upper half 1 Corner pillar of existing steel tower 2 Corner pillar of tower junction section 3 Corner pillar of temporary guide tower pillar 11 Guide roller 12 Guide arm 13 Guide rail 13a Side edge 14 Bearing member 15 Fixing bracket 16 Fastening bolt / nut 17 Pulley 18 Winch 19 Wire

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toshihiro Sumi 232-1 Nakashita Kosakacho, Masuda-gun, Gifu Prefecture Nakaden Kosaka Ryo 605 (72) Inventor Makoto Kato 10-13, Daifukucho, Gifu City, Gifu Prefecture Shima A Part 2-34 (72) Inventor Yoshihiro Kuwabara 2-8D, 6-8-1 Unumayamazakicho, Kakamigahara City, Gifu Prefecture (72) Inventor Hideo Nawa 42-2, Gonaka Kawada, Odaida, Oshirota, Kisogawa-cho, Haguri-gun, Aichi Prefecture References JP-A-53-110235 (JP, A) JP-A-54-124540 (JP, A) JP-A-59-55963 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) E04H 12/10 H02G 7/00 H02G 1/02 307

Claims (4)

(57) [Claims] 1. A tower base A which is a lower layer of an existing steel tower 100.
And a tower relay section C for ascending connection between the tower main body section B and the tower main body section B connected to the upper side of the tower body section B. Installing a lifting device D that lifts and holds it to a desired height; and a tower junction C from the upper end of the tower base A upward.
Adding a guide mechanism E for guiding the lifting movement of the tower body B between the tower relay section C and each of the corner pillars 1 and 2 of the tower body B; Separating the tower body A from the tower base A, lifting the tower body B by the height of the tower relay section C by the lifting device D while being supported by the guide mechanism E, A method of relaying a steel tower, comprising: a step of connecting a lower end of a section B to an upper end of a tower relay section C; and a step of removing a used lifting device D, a guide mechanism E, and the like. 2. The method according to claim 1, further comprising the step of adding a temporary guide tower column F having an arbitrary height at the upper end of the tower relay section C to guide the lifting movement of the tower body section B. Relay tower construction method. 3. The method according to claim 1, wherein each of the corner pillars 1 of the tower main body B projects toward each corner pillar 2 of the tower relay section C which is opposed to the outside thereof. A guide arm 12 having a guide roller 11 attached to the tip thereof; and a guide rail 13 detachably attached to the inner side surface of each corner post 2 of the tower relay section C to slide the guide roller 11. A guide mechanism for ascending a steel tower, comprising: 4. The guide rail according to claim 3, wherein the guide rail is formed so as to sandwich the corner post in cooperation with fixing brackets arranged at a plurality of positions in the longitudinal direction. Guide mechanism for elevated towers.