JP3333445B2 - Corrosion protection device for suspension bridge cables - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion device for preventing corrosion of an end portion of a suspension bridge cable fixed to a fixing portion.

[0002]

2. Description of the Related Art Suspension bridge cables in long suspension bridges transmit the load of the bridge floor to the ground together with the main tower. In particular, the end of the suspension bridge cable fixed to the anchorage part affects the life of the suspension bridge. And is generally housed in a concrete building.

By the way, in such a suspension bridge cable,
Various proposals have been made to protect the parts exposed to the wind and rain, for example, there is a means in which a thin wire is wound around the outer periphery of a suspension bridge cable, and a coating is applied from above.

[0004]

However, since the suspension bridge cable is very long and thick, it is necessary to completely prevent rainwater or the like from entering the inside of the cable even if the above-described anticorrosion means is applied. Was very difficult.

Accordingly, rainwater or the like flows down to the end of the suspension bridge along the suspension bridge cable, causing corrosion such as rust at the end of the suspension bridge cable, which may be called the lifeline of the suspension bridge, and shortening the life span of the suspension bridge. There was a great problem of promoting the conversion.

However, at the end of the suspension bridge cable, there is no effective anticorrosion means, and the development of such anticorrosion means has been strongly demanded.

SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned conventional problems, and it is possible to reliably prevent corrosion at the end of a suspension bridge cable, thereby greatly contributing to extending the life of the suspension bridge. The task is to find out.

[0008]

In other words, the means adopted by the present invention to solve the above-mentioned problems is that the concrete building A
An anticorrosion device for anticorrosion of an end side of a suspension bridge cable K fixed to a fixing portion 14 formed by a part of an inner wall surface of the suspension bridge, comprising a moisture-proof and flexible film material, I from the end of the cable K and the film body 1 which can be covered, the dehumidifier 11 for dehumidifying the interior space 10 of the membrane body 1
The film body 1 has an airtight fastener along its longitudinal direction.
8 is provided and the airtightness of the internal space 10 of the film body 1 is maintained.
Fixing pieces 5, 6, and 7 extending from the film body 1 are provided in order to
The fixing pieces 5, 6, and 7 are interposed via a rubber sheet 15.
Fixing to inner wall of concrete building A by holding member 16
In the not that the point that is.

Therefore, according to the anticorrosion device comprising the above means ,
Then , by controlling the humidity of the internal space 10 of the film body 1 by the dehumidifier 11, it is possible to prevent corrosion of the suspension bridge cable K disposed in the internal space 10.

Further, the film body 1 may be made of a transparent or translucent film material. Or
By adopting such a configuration, the state of the internal space 10 of the film body 1 can be visually confirmed from the outside.

Further , according to the invention of claim 1 or 2,
Then, as in the invention of claim 3, the film body 1 is formed in a substantially cylindrical shape.
And a middle portion of a lower surface opening connected to the tip portion 2
3, a substantially quadrangular pyramid-shaped base end portion 4 connected to the intermediate portion 3;
May be configured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a film formed in a desired shape using a transparent or translucent film material having a moisture-proof property, and includes a substantially cylindrical tip 2 and a tip 2. An intermediate portion 3 having an open bottom surface and a base portion 4 having a substantially quadrangular pyramid shape and connected to the intermediate portion 3 are provided.

Reference numeral 5 denotes an annular fixing piece extending to the end of the distal end portion 2 of the film body 1, reference numeral 6 denotes a fixing piece extending to the lower periphery of the intermediate portion 3, and reference numeral 7 denotes an end of the base end portion 4. 2 shows a fixing piece extending over the entire circumference.

Reference numeral 8 denotes an airtight fastener provided along the longitudinal direction of the film body 1 so that the film body 1 can be attached to the suspension bridge cable K. In this embodiment, the airtight fastener is provided at the distal end portion 2 and the base end portion 4. ing.

Reference numeral 9 denotes a connecting pipe provided at the distal end 2 and the proximal end 4 of the membrane 1 so as to communicate with the internal space 10.

Reference numeral 11 denotes a dehumidifier connected to each connection pipe 12 to dehumidify the internal space 10 of the film body 1. The dehumidifier 11 may be of a so-called cooling type or adsorption type. However, in this embodiment, a cooling type dehumidifier is adopted in consideration of external release of dehumidified water, cost, and the like.

The anticorrosion device according to this embodiment has the above-described configuration. Next, a case where the end portion of the suspension bridge cable K is used for anticorrosion will be described.

The end of the suspension bridge cable K is housed in a concrete building A as shown in FIG.
The end of the suspension bridge cable K branched into a plurality of pieces by 13 is fixed to an inclined surface serving as a fixing section 14.

The end of the suspension bridge cable K is covered with the film body 1.
After the membrane body 1 is attached to the suspension bridge cable K in a state in which the airtight fastener 8 is opened, the airtight fastener 8 is closed.

Thereafter, the film body 1 is fixed using the inner wall surface of the concrete building A. That is, as shown in FIG.
The fixing pieces 5, 6, 7 provided at each part of the above are interposed between a pair of rubber sheets 15, and a pressing member 16 having a frame formed of an L-shaped angle member is disposed thereon, and the inside is fixed by a concrete bolt 17 with a concrete bolt 17. Fix to the wall. As a result, the joint between the membrane 1 and the concrete building A is sealed, and the airtightness of the internal space 10 of the membrane 1 is maintained.

The base end portion 4 of the film body 1 is held in a suspended state by a wire if necessary.

Then, when the dehumidifier 11 installed at a predetermined position in the concrete building A and each connection pipe 9 provided on the membrane 1 are connected by piping, a series of construction work is completed.

Next, when anticorrosion on the end side of the suspension bridge cable K is to be performed by the anticorrosion device, the internal space 10 of the membrane 1 is required.
By automatically operating the dehumidifier 11 continuously or intermittently while performing the humidity measurement with a sensor or the like, the humidity of the internal space 10 is always maintained in a suitable state.

As a result, appropriate corrosion protection can be achieved without causing corrosion such as rust on the end side of the suspension bridge cable K, which can greatly contribute to extending the durable life of the suspension bridge itself.

Further, since the lightweight and flexible membrane 1 is used as a covering means for the suspension bridge cable K, the suspension bridge cable K is not damaged during and after construction. In addition, there is an advantage that it can be used for a series of construction work.

Furthermore, since only the internal space 10 of the small space defined by the film body 1 needs to be dehumidified, the dehumidifier 11
In this case, a relatively small capacity can be used, and the operating cost can be reduced.

Further, since the film body 1 is made of a transparent or translucent film material, the condition of the internal space 10 can be visually checked from the outside, which can greatly contribute to the maintenance and management thereof. .

For example, it is possible to detect the occurrence of an abnormal situation at the end of the suspension bridge cable K at an early stage. In this case, it is possible to respond promptly by cutting the membrane 1, so that a large accident The occurrence can be prevented beforehand.

The specific shape of the film body 1 is not limited to the one described in the above embodiment, but can be arbitrarily changed according to the shape of the end portion of the suspension bridge cable K.

Further, the end of the suspension bridge cable K is not always accommodated in the concrete building A. Even in this case, the anticorrosion device according to the present invention can be applied. In consideration of maintaining the quality of the film, it is preferable that the film body 1 is not exposed to wind and rain by any means.

Further, the material of the film material constituting the film body 1 only needs to have a moisture-proof property, and the number of dehumidifiers 11 can be appropriately changed according to the capacity of the internal space 10 of the film body 1. .

[0033]

As described above, according to the present invention, the end of the suspension bridge cable is covered with the membrane, and the internal space of the membrane is dehumidified by the dehumidifier. It can be suitably maintained, so that corrosion can be appropriately prevented without causing corrosion such as rust on the end side of the suspension bridge cable, and as a result, it can greatly contribute to extending the durable life of the suspension bridge itself. A special effect has been achieved.

Further, since the membrane as a means for covering the suspension bridge cable is made of a lightweight and flexible membrane material, the suspension bridge cable may be damaged during and after construction. In addition, there is an effect that it can be used for a series of construction work.

Furthermore, since only the internal space of the small space defined by the membrane needs to be dehumidified, a relatively small capacity dehumidifier can be used, and the operating cost can be reduced. There is also a practical effect.

Further, when the film body is made of a transparent or translucent film material as in the second aspect of the invention, it is possible to visually check the state of the internal space from the outside, and to maintain and control the state of the internal space. It has a unique effect that it can greatly contribute to stool.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a film body according to the present invention.

FIG. 2 is a front view including a partial cross section showing the same use state.

FIG. 3 is an enlarged front view of a main part including a partial cross section showing a fixing state of a film body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Membrane 10 ... Internal space 11 ... Dehumidifier 14 ... Fixing part K ... Suspension bridge cable

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masashi Togemoto 9-1, Higashigosho-cho, Onomichi-shi, Hiroshima Onomichi Waterfront Building Inside Honshu-Shikoku Bridge Bridge Engineering Co., Ltd. (72) Inventor Yuji Emura Yodogawa-ku, Osaka-shi 4-8-4 Kigawa Higashi Taiyo Kogyo Co., Ltd. Examiner Tomoya Yanagisawa (56) Reference JP 8-177012 (JP, A) JP 10-1559019 (JP, A) JP 3-152283 (JP, A) JP-A-61-55281 (JP, A) JP-A-11-81229 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01D 19/08-19 / 10 E01D 19/16 E01D 11/00-11/04

Claims (3)

(57) [Claims] [1] Part of the inner wall in the concrete building (A)
A corrosion protection system for corrosion protection of the end of the suspension bridge cable (K) which is fixed to a fixing portion formed (14) by, consists film material having a moisture resistance and flexibility and the suspension bridge cable ( the end of the K) and the covering can be film body (1), the membrane body (1)
And a dehumidifier (11) for dehumidifying the internal space (10) of the
Ri, the membrane body (1) is airtight zipper along the longitudinal direction
(8) is provided and the airtightness of the internal space (10) of the membrane (1) is improved.
Fixing pieces (5), (6), extended from the film body (1) to maintain
(7) is provided, and the fixing pieces (5), (6), (7) are provided with a rubber sheet (1).
5) through the holding member (16) to the concrete building (A)
Is fixed to the inner wall surface have anticorrosion device of suspension bridge cable, wherein Rukoto. 2. The anticorrosion device for a suspension bridge cable according to claim 1, wherein said film body (1) is made of a transparent or translucent film material. 3. The film body (1) has a substantially cylindrical tip (2).
A middle part (3) of a lower surface opening provided continuously with the tip part (2);
It consists of a substantially quadrangular pyramid-shaped base end (4) connected to the middle part (3).
The anticorrosion device for a suspension bridge cable according to claim 1 or 2.