JPS5955963A - Method and apparatus for raising power transmission tower - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method and apparatus for raising the entire upper part of an iron base of an overhead power line installed in an overhead line.

When increasing the height of electric wires between existing steel towers to cope with the rise of surrounding buildings, or when increasing the height of steel towers due to increased electricity demand, etc., rebuilding a new steel tower requires:
Since it is not possible to easily implement a temporary tower due to various problems such as land, construction cost, labor, power outage, etc., in the present invention, temporary tower pillars are installed vertically on the outside of the foundation legs of the existing tower. The rods fixed to the outer ends of the tower support beams extending below the ground of the existing tower are installed by the integrated operation of the hydraulic wheel jack parts that are fixed integrally to the temporary tower pillars. After lifting and moving the above-ground part of the steel tower which is moved up and down and separated from the foundation below the steel tower support beam without particularly damaging its vertical posture, the raised leg unit is connected and installed at the bottom of the upper part of the separated iron base, If necessary, attach the entire raised leg unit to the raised leg unit, and after lifting and moving again without damaging the vertical posture, connect the upper part of the second raised leg unit to the base leg. The object of the present invention is to provide a method and device for raising the surface to make it more stable.

To explain the raising construction method and device of the present invention according to the attached drawings, for an existing steel tower (1) (Fig. 1), the tower foundation leg (2) is attached to the outer part including (Fig. 1.14). For example, a new foundation (8) is formed on the two orthogonal diagonals between each leg, with appropriate reinforcement foundations such as a cross shape (Figure 2.15).
6. Each temporary tower column (6) is fully vertically installed on the new foundation (8), and the raising device (6) is fully installed on the temporary tower column (6) (Fig. 6). This raising device (6) is the 9th to 11th
As shown in the figure, for example, it is suspended and supported by a jack bracket (7) fixed to the upper part of each temporary tower column (6) placed outside each corner of the existing steel tower (1) at a distance of 81i. Hydraulic system lines are connected and installed in order to integrally control the hydraulic jack parts of each center hall through a jack pedestal (9)'z fixed on the upper surface of the jack support beam (8) at an appropriate position (No. 9).
Figure 1o). On the other hand, the steel tower support beam (11) installed across the lower part of the steel tower (1) can be of any arbitrary configuration, such as being laid parallel or stacked in a cross-shaped shape, and the outer end has the above-mentioned hydraulic jack part σ0.
), the lower ends (12a) of the rods (12) are fixed, respectively, and are formed to move up and down based on the control operation of the hydraulic jack (1.10). Figure 11).

aS> is a vertical posture holding device used in the process of raising the ground part (1a) of the divided steel tower, and as shown in Fig. 12, it holds the upper and lower positions of the above ground part (1a) of the tower at least in two positions. Horizontal arm rods α6) (161, 57) 1, 17)' are integrally fixed, and each support roller μ5) (ll, which is a set of two upper and lower bodies, for example, is fixed at both outer ends. The support rollers are connected to the inner wall surface of the L-shaped steel guide rail, which is installed integrally in the center of the corner brace of the support frame of each temporary tower column (6), as shown in Figure 10. has been done. As mentioned above, it is desirable that the upper and lower horizontal arm rods u6) (t5) and σ7 rivers 6 are provided at least in two positions, upper and lower, and are provided as a pair on two orthogonal diagonal lines as shown in Fig. 13. .

When the above-ground part of the divided steel tower (1a) moves upward, the supporting rollers (191) provided at the upper and lower two positions as described above exert a lever reaction force on each other, and each temporary tower pillar (6) is pre-loaded. Since it is guided and supported on a preset vertical line, it will not be in an inclined position and the support roller μ5) (
Smooth movement is obtained by the rotation of 19).

After installing the above-mentioned raising device (6) on the temporary tower column (51), the foundation legs (2) are divided, the raising device (6) is activated, and the above-ground part (1a) of the tower in the divided state is raised to the tower support. In connection with the upward movement of the beam, it can be smoothly moved upward without impairing the imperial posture.First, after forming a separation space (ISa) with a desired height of e.g. 4 to 5 m as the first step, the first The raised leg unit) (14a) is assembled and formed, the upper surface of which is connected to the divided bottom part of the above-ground part of the steel tower (1a), and the lower surface of which is connected to the new foundation part that is integrally fixed to the leg part (2) of the divided base 4a. (4) is connected and installed to perform the first raising step. Furthermore, if it is desired to extend the raised height by 4 to 5 m as a second step, after the first raising step is completed, the first raising leg unit (14, a) is again fitted with the raising device (6). (Fig. 5), the connection between the new foundation (8) and the foundation (4) is completely severed, and the raising device (6) is activated. 1
The above-ground part of the steel tower (1a) that is integrated with the raised leg unit (14a) forms the second section M9 (13b) (Fig. 6). A second raised leg unit) (14b) is placed in the space.
i Assemble and form, connect the upper and lower surfaces in the same way as in the previous step, and complete the second raising step (Fig. 7). By removing the temporary tower column (6), the original height of the tower (T
l), by going through the first raising process, the same height becomes (
It can be changed to T2), and if necessary, by going through the second raising process, the 1st height can be changed to (TI) (
Figure 8).

As described above, the present invention provides a foundation leg (2) of an existing steel tower (1).
By forming a new foundation part (8) including the outside, a temporary tower column (5) is completely vertically installed on the foundation part, and a raising device 1 (6) is installed on the temporary tower column, Steel tower (1
) Since the raising device (6) can be provided in the outer space of the Since it is installed integrally with the temporary tower column (6), the steel tower support beam that lifts and supports the above-ground part of the divided steel tower (1a) μm
) are integrally moved up and down by the operation of hydraulic jacks qO) that move their respective outer ends integrally, and the vertical posture holding device itμ
s) It is a raising method that has excellent stability in the lifting posture of the above-ground part (1a) of the steel tower because it moves without damaging the vertical posture, and after the first raising step, a second raising step is performed if necessary. This is an excellent invention that is extremely easy and quick to proceed with the work, and brings about safe and reliable raising work.

[Brief explanation of the drawing]

Figures 1 to 8 are front views showing the work order in the construction method of the present invention, Figures 9 to 11 show the raising device, Figure 9 is a partially enlarged front view showing the hydraulic jack part, and Figure 10. is the same plan view, FIG. 11 is the same figure showing the steel tower support beam, FIG. 12 is a side view of the vertical posture holding device, FIG. 16 is the same plan view, and FIG. 14 is a sectional view taken along the line A-A in FIG. , FIG. 15 is a sectional view taken along the line B--B in FIG. 2. (1) Steel tower (2) Foundation legs (8) Newly installed foundation (4) Newly installed foundation legs (6) Temporary tower column (6) Raising device (7) Jacket support bracket (8) Jacket support beam (9) Jyatsuki pedestal
1.1o1 Hydraulic jack part σ1) Steel tower support beam
(12) Mouth/Sodo (18) Separation Nitoma
(6) Raised leg unit ψ Vertical posture holding device (16) σ7) Upper and lower horizontal arm rods U3X19
) Support roller □□□ Support Frame base) Corner bracing - Guide rail σ) High-ranking applicant for the steel tower: Chubu Oriki Co., Ltd. and 1 other person

Claims (2)

[Claims] (1) Assembling and forming the raised leg unit lr in the separated space that allows for smooth lifting and movement without compromising the vertical posture through rods that are fixed to the temporary tower support beam installed vertically on the outside of the existing steel tower. The upper surface shall be connected to the divided bottom part of the above-ground part of the steel tower, and the lower surface shall be connected to the divided foundation part.
-Characteristic method for raising the height of transmission towers. (2) A temporary tower column is installed vertically on the outside of the existing steel tower, a hydraulic jack part is fixed to the temporary tower column, and a bridge is installed at the opening/end where the steel tower support beam to be passed to the above-ground part of the steel tower is fixed. A vertical posture holding device is also constructed in which upper and lower horizontal arm rods are fixedly connected to each other so as to be able to move up and down freely, and the upper and lower horizontal arm rods have support rollers at both ends that are connected to guide rails installed on the support frame of the temporary tower column. A device for raising the height of power transmission towers with all its features.