JPH0213115B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for constructing an environmentally friendly steel tower, that is, a single-column type power transmission tower under an existing line, and a device used in the method. .

<Prior Art> When constructing this type of power transmission tower, a truck crane is generally used, and a climbing crane is used in some narrow areas. Since all of these construction methods are stacked, rebuilding under existing wires requires relocating the wires.

Furthermore, construction of on-site joints requires temporary scaffolding and requires work at heights.

<Purpose of the Invention> This invention was proposed in view of the above circumstances, and its purpose is to be able to carry out construction work without completely stopping the existing line, and to safely and quickly install a steel tower near the ground. The object of the present invention is to provide a construction method and an apparatus for the construction.

<Structure of the Invention> The method for constructing a steel tower, etc. according to the present invention includes erecting a guide tower of a required height on the base column leg of the tower placed under the existing tower electric wire, and constructing an upper part capable of holding the unit tower body. The guide ring and the lower guide ring are configured to move up and down within the guide tower, and after the unit tower body carried into the lower part of the guide tower is connected to the upper unit tower body, the unit tower body is moved by the upper and lower guide rings. The steel tower is built near the ground from the top to the bottom by holding the tower body and pushing it up, repeating the steps of carrying in, connecting, and pushing up, and when the arm attachment part on the top of the tower body passes the top of the guide tower. Then, the steel tower can be constructed by attaching the cross arm to the cross arm attachment part so that it is parallel to the existing overhead wire, and when the tower reaches a predetermined height, the tower can be swiveled so that it can be fixed perpendicular to the existing overhead wire. It is something to be completed.

The steel tower construction device according to the present invention includes a guide tower erected at a required height on the base of the steel tower,
An upper guide ring and a lower guide ring are connected to each other, and the upper guide ring and the lower guide ring are movable up and down along a guide rail erected on the inner surface of the guide tower and can hold the unit tower body. The lift-up mechanism includes a suspension beam in which engaging holes are formed at equal intervals in the vertical direction, and a lift-up mechanism that is installed approximately in the vertical center of the guide tower and can move the suspension beam up and down. Upper and lower securing parts each have upper and lower locking pins that can enter and exit the engagement hole, and these upper and lower securing parts are connected by a fluid pressure cylinder, and one of them is fixed to the guide tower. This lift-up mechanism was used to raise the tower body in an inchworm-like manner.

<Example> The present invention will be described below based on an illustrative example. As shown in FIG.
This is the case of a steel pole T having a cross arm A at the top, and the construction device 1 according to the present invention is placed under the existing steel tower electric wire, and the construction device 1 assembles the steel pole T from the top to the bottom and raises it up. As will be described in detail, the arm A is attached to the arm attachment part at the top of the construction device 1 so that the arm is parallel to the existing overhead wire, and when the tower reaches a predetermined height, the tower is orthogonal to the existing overhead wire. The construction of the steel tower is completed by rotating it so that it can be fixed in place.

As shown in FIGS. 2 to 6, the construction device 1 includes a guide tower 3 erected at a required height on a steel tower foundation column base 2, and a guide tower 3 along the inside of a column member 3a of the guide tower 3. An upper guide ring 5 and a lower guide ring 6 that are movable up and down using guide rails 4 erected as guides and that can hold a unit tower TU, and a hanging beam 7 that connects the guide rings 5 and 6. , a lift-up mechanism 8 installed approximately in the vertical center of the guide tower 3 and capable of moving the hanging beam 7 up and down.

The guide tower 3 is divided into an upper guide tower 3A and a lower guide tower 3B.

The upper and lower guide rings 5 and 6 are divided into two parts, and have guide rollers 9 and 10 that can roll on the guide rail 4 at positions corresponding to the column members 3a. Furthermore, on the upper surface of the guide rings 5 and 6,
As shown in FIG. 7, a plurality of pressing members 12 are provided at equal intervals in the circumferential direction and are moved forward and backward by screw members 11, and by adjusting the screw members 11, the unit tower body TU is aligned and the unit tower body TU is aligned. Hold the tower. In addition, a plurality of hanging fittings 13 are attached to the lower guide ring 6 at equal intervals in the circumferential direction, and by connecting these hanging fittings 13 to the hanging piece 14 at the bottom of the unit tower body, the tower body load when raised is received by the lower guide ring 6.

The suspension beam 7 is disposed at a position corresponding to the guide rail 4, and its upper and lower ends are pinned to guide rings 5 and 6, respectively. Furthermore, the hanging beam 7 is provided with engagement holes 1 at predetermined pitches in the vertical direction.
5 is drilled.

The lift-up mechanism 8 is disposed on each suspension beam 7, and as shown in FIGS. 8 and 9, the suspension beam 7 has an upper lashing part 16 and a lower lashing part 17 passing through the center. The binding part 17 is fixed in a state spanning the adjacent horizontal member 3b of the lower guide tower 3B (see FIG. 3), and the upper securing part 16 is connected to the lower securing part 17 by two hydraulic cylinders 18. It is connected and can be moved up and down.

Engagement holes 15 are provided in the upper and lower securing parts 16 and 17.
An upper locking pin 19 and a lower locking pin 20 are provided which can move in and out of the suspension beam 7.
When moving relative to the lifting beam 7 in the upward direction (when the hanging beam 7 rises and when the pins 19 and 20 move in the downward direction with respect to the hanging beam 7), the engagement hole 1
5, it is automatically attached and detached. That is, the pins 19 and 20 have inclined surfaces whose tips point downward and which are inclined toward the main body, and are movable forward and backward by the sleeve 21. Furthermore, pin 19,
The proximal end of the manual lever 22 and the securing portion are pinned to the securing portion via the manual lever 22 and the link 23, and the tip of the manual lever 22 and the securing portion are connected by a spring member 24.

With such a configuration, pins 20 and 21 are
The spring member 24 biases the suspension beam 7 toward the suspension beam 7, and the slanted tip of the suspension beam 7
The pin is automatically and reliably attached and detached during relative movement in the upward direction of the pin. Therefore, when lifting the hanging beam 7, that is, the guide rings 5 and 6, the lifting is automatically performed intermittently like an inchworm simply by expanding and contracting the hydraulic cylinder 18.

When lowering the hanging beam 7, use the manual lever 2.
2, the pins 19 and 20 are manually moved in and out of the engagement hole 15 alternately and lowered.

Furthermore, as will be described later, when it is desired to forcibly lower the suspension beam 7, the intermediate locking pin 25 is used since the pins 19 and 20 will automatically come out of the engagement hole 15. Normally, it is separated from the engagement hole 15.

Next, as shown in FIGS. 2 and 5, a pair of loading rails 26 are laid at the bottom of the guide tower 3, sandwiching the column base 2 and extending laterally. A tower body carrying cart 27 is installed.

In the above configuration, first, the assembly of the construction device will be explained. Here, the upper part of the steel pole T is assembled together with the apparatus.

The steel tower foundation column foot 2 is installed at the center of the steel tower and fixed with anchor bolts 28 (see FIG. 10a).

Assemble the lower guide tower 3B. however,
The horizontal member 3b and guide rail 4 on the tower body entrance face are not assembled. The lower work scaffolding 29 is also assembled except for the tower loading entrance surface (10th
(see figure b).

The carry-in rail 26 is carefully assembled horizontally, and the tower body carry-in cart 27 is installed on this rail 26. The pre-assembled lower guide ring 6 is temporarily placed in the center of the loading cart 27 via the sleeper 30 (first
(See Figure 0c).

The cart 27 is carried into the center of the guide tower 3 and fixed. The upper unit tower TU2 to be assembled first is placed and fixed on the center of the trolley 27 (see FIG. 10d).

With the lift-up mechanism 8 inserted into the suspension beam 7 and fixed by the locking pins 19 and 20, the suspension beam 7 is suspended by a crane and the lift-up mechanism 8 is installed on the horizontal member 3b (see FIG. 10e). By lifting the suspension beam 7 slightly from this state, the load of the suspension beam 7 applied to the locking pin is removed, so the locking pin is removed. As a result, the suspension beam 7 and the lift-up mechanism 8 are freed, and the suspension beam 7 is lowered and connected to the lower guide ring 6 with a pin (see FIG. 10f).

Assemble the horizontal members, guide rails, and work scaffolding on the tower loading surface of the lower guide tower 3B.

The upper guide ring 5 is suspended on the suspension beam 7 and connected with pins (see FIG. 10g).

The upper guide tower 3A is assembled on the lower guide tower 3B, leaving the loading surface (see FIG. 10h).

The uppermost part of the tower column TU1 is suspended on top of the unit tower body TU2 and bolted together (see Figure 10i).

horizontal member on the loading surface of the upper guide tower 3A;
Assemble the guide rail and upper work scaffold 31. Further, a tower body holding device 32 is installed at the top of the guide tower 3A (see FIG. 10j).

The hydraulic unit 33 and the hydraulic cylinder 18 of the lift-up mechanism are connected with a high-pressure rubber hose.
The hydraulic unit 33 and the operation panel 34 are connected with a cable. Connect the power supply to the hydraulic unit control panel (see Figure 10k).

With the above, preparations were made for the approach.

Next, a description will be given of raising by such a device.

(i) From the state shown in FIG. 10 k or FIG. 11 a, connect the hanging metal fittings 13 of the lower guide ring 6 and the hanging pieces 14 of the lower unit tower body in the guide tower 3 with pins, and each hanging metal fitting Adjust the length of the screws so that the lift-up weight is evenly applied to 13.

(ii) As shown in FIG. 7, the pressing members 12 of the upper and lower guide rings 5 and 6 are adjusted with the screw members 11 to hold the column so that the center of the column is located at the center.

(iii) Turn on the control power of the hydraulic unit 33 and start the hydraulic pump.

(iv) After the hydraulic cylinder 18 is retracted and the upper and lower locking pins 19 and 20 are securely inserted into the engagement hole 15, turn on the lift switch on the operation panel 34. As a result, the upper and lower guide rings 5 and 6 are pulled up via the suspension beam 7 locked by the upper locking pin 19, and the column connected to the lower guide ring 6 is lifted up. Here, since the column is connected to the lower guide ring 6, a tensile load acts on the suspension beam 7, so there is no fear of buckling, and the suspension beam 7 can be made into a lightweight member.

(v) The lower locking pin 20 is automatically removed when the suspension beam 7 is lifted up, and is lifted up until it automatically enters the lower engagement hole 15.

(vi) After confirming that all the lower locking pins 20 have entered the lower engagement holes 15, turn on the lower switch, the hydraulic cylinder 18 will contract, and the upper locking pin 19 will automatically come off. It contracts until it enters the engagement hole 15 in the lower stage.

(vii) Repeat the above-mentioned inchworm-like intermittent operation to lift the tower up to a height where the next unit tower TUi can be carried in (see Figure 11b).

(viii) On the other hand, after the tower body begins to lift up and the load on the truck is removed, the truck fixing fittings (not shown) are removed and the truck 27 is carried out of the guide tower 3.

(ix) Mount the next tower body TUi on the trolley 27, adjust the tower body holding metal fittings 35 (see Fig. 5) on the trolley, and fix it at the center of the trolley.

(x) After confirming that the height to the bottom of the tower body that was lifted up earlier is such that the next tower body TUi can be carried in without any problem, the trolley 27 is carried into the center of the guide tower 3 and fixed (see Figure 11c). .

() The upper tower body, which had been lifted up, was lifted down using the lowering switch, and the tower body on the trolley was lifted down.
Lower it until it touches the upper joint surface of the TUi.
If the centers of the upper and lower tower bodies, bolt holes, etc. do not match, use the tower body holding fittings 35 on the trolley 27.
(See Figure 5) and adjust so that the upper and lower joining surfaces are aligned.

() In the case of welded joints, the backing material is inserted into the mating tower body as a guide, but if the weight of the upper tower body alone cannot be inserted to the joint surface due to deformation of the tower body, etc., the intermediate locking pin 25 is inserted into the engagement hole. 15, compress the hydraulic cylinder 18, and press fit (the upper and lower locking pins 19,
20 has a structure that automatically comes off in the downward direction).

() Bolt or weld the upper and lower tower joint surfaces.

() Adjust the tower body holding device 32 at the top of the guide tower to hold the tower body (see Figure 11c).

() Slightly retract the hydraulic cylinder 18 to remove the load on the hanging metal fitting 13 of the lower guide ring 6, and then remove the connecting pin. Then,
The pressing members 12 of the upper and lower guide rings 5, 6 are loosened to free the tower body and the guide rings 5, 6.

() Manually remove the upper locking pin 19,
By extending the hydraulic cylinder 18, the upper locking pin 19 automatically enters the engagement hole 15 one level higher. Further, remove the lower locking pin 20 by stretching it until the load on the lower locking pin 20 is released.

() The hydraulic cylinder 18 is retracted to lower the suspension beam 7, and the lower locking pin 20 automatically enters the engagement hole 15 and retracts until the load is applied to the pin. (The upper and lower guide rings 5 and 6 will be lowered by one pitch of the engagement hole.) () Repeat the inchworm-like movements of () and () above, and the hanging metal fitting 13 of the lower guide ring will be lowered to the tower body on the trolley. Lower it until it can be joined to the lower hanging piece (see Figure 11d).

A steel pillar is constructed by repeating the above operations.

In addition, when assembling arm A, lift up the tower body, and when the arm arm attachment part passes the top of guide tower 3, place arm arm A on the upper work scaffold.
The steel tower can be constructed by attaching it to the arm mounting part so that the cross arm is parallel to the existing overhead wire, and after the entire lift-up and connection are completed, the tower can be swiveled so that it can be fixed perpendicular to the existing overhead wire. Complete.

Furthermore, in the case of welding, the welded joints are painted inside the guide tower and on the upper work scaffold after welding and inspection are completed. Depending on the conditions, temporary scaffolding for painting may be installed at the top of the guide tower and painting may be carried out.
Painting work shall not be carried out at high places.

<Effects of the Invention> As described above, the method for constructing a raised structure according to the present invention provides the following effects.

Construction work can be carried out without relocating existing lines or completely stopping power transmission (stopping one side of the line), eliminating the need to stop power transmission or relocation work, and shortening the construction period.

This reduces the need for high-altitude work such as assembly, welding, and painting, leading to safer work.

Because the work is done on a guide tower workbench rather than on temporary scaffolding, the quality of both welding and painting improves.

It can be constructed even in narrow spaces.

The upper part can be moved up and down within the tower guide,
Stable lifting is possible with the lower guide ring.

The push-up construction device according to the present invention has the following effects, and also has the following effects.

(i) Since the hydraulic cylinder and locking pin push up like an inchworm, work can be performed safely and reliably with a relatively simple configuration.

(ii) Since the weight of the tower is supported by the lower guide ring, the weight of the hanging beam can be reduced, and the weight of the equipment can be reduced.

[Brief explanation of drawings]

Fig. 1 is a front view showing a steel column, Fig. 2 is a front view showing a construction device according to the present invention, Figs.
5 is a sectional view taken along the - line in FIG. Figure 9 is a front view and longitudinal sectional view showing the lift-up mechanism, Figures 10 a to k are process diagrams showing the assembly of the lift-up mechanism and the upper part of the tower in order of process, and Figures 11 a to e are views of the tower body approaching. FIGS. 12A to 12D are process diagrams showing the method for assembling the armrest in the order of steps. FIGS. T...Iron pillar, A...Archive, 1...Construction device, 2
... Steel tower foundation column base, 3, 3A, 3B ... Guide tower, 3a ... Column member, 3b ... Horizontal member, 4
... Guide rail, 5 ... Upper guide ring, 6
...Lower guide ring, 7...Hanging beam, 8...
... Lift-up mechanism, 9, 10 ... Guide roller, 11 ... Screw member, 12 ... Pressing member, 13
... Hanging fitting, 14 ... Hanging piece, 15 ... Engagement hole, 16 ... Upper lashing part, 17 ... Lower lashing part, 18 ... Hydraulic cylinder, 19 ... Upper locking pin, 20 ... Lower locking pin, 21...
... Sleeve, 22 ... Manual lever, 23 ... Link, 24 ... Spring member, 25 ... Intermediate locking pin, 26 ... Carrying rail, 27 ... Tower body carrying cart, 28 ... Anchor bolt, 29 ... Lower work scaffold, 30...Sleeper, 31...Upper work scaffold, 3
2... Tower body holding device, 33... Hydraulic unit, 3
4...Operation panel, 35...Tower body holding metal fittings.

Claims (1)

[Scope of Claims] 1. A guide tower of a required height is erected on the foot of the base column of the steel tower placed under the existing steel tower electric wire, and the upper guide ring and the lower guide ring capable of holding the unit tower body are arranged as described above. The unit tower is configured to move up and down within the guide tower, and after the unit tower carried into the lower part of the guide tower is connected to the upper unit tower, the unit tower is held by the upper and lower guide rings and pushed up. The steel tower is constructed near the ground from the top to the bottom by repeating loading, connecting, and raising the tower, and when the arm attachment section at the top of the tower body passes the top of the guide tower, the arm is parallel to the existing overhead wire. The construction of the steel tower is completed by attaching it to the cross arm attachment part so that the steel tower reaches a predetermined height, and rotating the tower so that it can be fixed orthogonally to the existing overhead wire. How to build a looming structure. 2. A guide tower erected at the required height on the base of the steel tower, and an upper part that is movable up and down along a guide rail erected on the inner surface of the guide tower and that can hold the unit tower body. A hanging beam that connects the guide ring, the lower guide ring, the upper guide ring and the lower guide ring, and has engagement holes drilled at equal intervals in the vertical direction, and is installed approximately in the vertical center of the guide tower. and a lift-up mechanism that can move the hanging beam up and down, and the lift-up mechanism includes upper and lower locking parts each having an upper and lower locking pin that can move in and out of the engagement hole, and the upper and lower locking parts 1. An apparatus for raising a steel tower, characterized in that the binding portions are connected by a fluid pressure cylinder and one of the binding portions is fixed to the guide tower.