JP5067694B2 - Method of installing electrode for anticorrosion to reinforced concrete structure and long groove opening closing device used in the method - Google Patents

Description

  The present invention relates to a method for installing an electrode for anticorrosion on a reinforced concrete structure, and to close a long groove opening used in the method, in which an anode material is embedded in a long groove formed on the surface of the structure at the time of performing an anticorrosion for a reinforced concrete structure. Concerning ingredients.

  In general, a non-consumable strip-like anode method is known as one method of an anticorrosion method for a reinforced concrete structure. When installing the strip-shaped anode, a groove is cut on the concrete surface at regular intervals, a hole is formed in the groove bottom using a concrete drill, etc., and the anode is formed using a resin pin or the like that fits into the hole. After identifying the material in the groove, the plaster is filled with a cement-based solidifying material such as cement mortar as an anode coating material to repair the groove. The anode material used in the non-consumable strip anode method is a mesh having a strip shape, and the dimensions are about 10 mm to 20 mm in width and about 0.5 mm to 1.3 mm in thickness. Depending on the design conditions of anticorrosion, it can be used properly.

  As an installation method of the anode material in such a strip anode system, a vertical installation method and a horizontal installation method are known (for example, Patent Document 1).

  Grooves for placing the anode material vertically (width of about 4 mm to about 10 mm, depth of about 20 mm to about 25 mm) are deeper than the width of the anode material using a cutter at the groove position to be cut on the concrete surface. It is formed by cutting a long groove having. On the other hand, the groove for horizontally installing the anode material (width of about 20 mm to about 25 mm, depth of about 15 mm to about 20 mm) is a long groove having a width larger than the width of the anode material. The both ends of the groove to be cut are cut with a cutter, and then the concrete between the cutters is removed using a chipper or the like.

Accordingly, the cost for cutting the groove on the concrete surface is lower in the vertical installation method than in the horizontal installation method, and therefore it is preferable to install the anode material vertically in order to reduce the cost in the strip anode method.
JP 2002-371391 A

  However, it is not possible to fill the cement-type solidified material by plastering so that the net-like mechanical material is completely covered in the long groove in which the anode material is vertically installed, which has a depth deeper than the width of the belt-like anode material. It is more difficult than filling a cemented solidified material in a wide long groove in which the anode material is horizontally installed. In particular, it is more difficult to fill cement-based solidified material into the long grooves formed on the lower surface of the reinforced concrete structure with the anode material installed vertically, resulting in poor durability and malfunctions due to cathodic protection due to poor filling. May cause.

  In addition, as a method of filling the cementitious solidified material into the long groove, a method of filling the solid groove by closing the opening of the long groove and injecting the solidified material into the inside is considered. As a method of attaching the long groove opening closing device, reinforced concrete is considered. Although the method of fixing and fixing an anchor on the surface of a structure or a method of fixing with an adhesive can be considered, the installation of the anchor is not preferable because it damages the concrete surface, and the number of work steps increases and the cost increases. There is a problem. In addition, fixing with only an adhesive has a problem that the holding force is insufficient and there is a risk of peeling off during operation.

  Furthermore, when the anode material acts as an anti-corrosion, oxygen gas is generated from the anode material, and it is necessary to effectively discharge it.

  In the present invention, in view of the conventional problems as described above, when installing an electrode for anticorrosion on a reinforced concrete structure, the filling work of a filler made of a concrete-based solidified material into a long groove into which an anode material is inserted is performed with less man-hours. The object of the present invention is to provide a method for installing an electrode for cathodic protection against a reinforced concrete structure that can be performed more easily and oxygen gas generated on the surface of the anode material is effectively released to the atmosphere.

The feature of the invention described in claim 1 for solving the conventional problems as described above and achieving the intended object is that a long groove is formed on the surface of the reinforced concrete structure, and an anode material is inserted into the long groove. In the method of installing an electrode for anticorrosion to a reinforced concrete structure in which the anode material is embedded by injecting a filler made of a cement-based solidifying material into the long groove,
At the center of the back surface of the elongated flat plate-like flange having a width wider than the opening width of the long groove, a press-fitting ridge that is prevented from coming off by being press-fitted into the opening of the long groove is integrated, and the flange width direction In the center, using a long groove opening closing tool formed by arranging a large number of through holes in the front and back in the length direction,
Adhering an adhesive tape to the flange outer surface side of the long groove opening closing tool to close the through hole,
The press fitting protrusion of the long groove opening closing tool is inserted into the long groove after inserting the anode material into the long groove, and the back surface of the flange is reinforced with an adhesive layer or an adhesive layer. Close the long groove opening by closely contacting the structure surface,
After that, a filler is injected into the long groove, and after the filler is solidified, the adhesive tape is peeled off to open the opening of the through hole to the atmosphere. .

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the press-fitting ridge integrally has a fin-like portion inclined on the side surface toward the flange side. There is.

A feature of the invention described in claim 3 is that it integrally has a press-fitting ridge which is prevented from coming off by press-fitting into an opening of a long groove formed on the surface of the reinforced concrete structure at the center of the back surface of the flat flange. And, in the center of the flange width direction, a large number of through-holes that are opened through on the front and back are arranged in the length direction,
A narrow groove having a depth extending from the center position in the width direction to the inside of the press-fitting ridge is continuously formed in the length direction on the surface of the flange, and the lower surface of the flange is inclined downward on both side edges. Formed into a tapered shape,
The electrode protection long groove opening closing device is formed by attaching a peelable adhesive tape to the outer surface of the flange and closing the through hole.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, on both side surfaces of the press-fitting ridge, a taper having a tapered cross section is formed, and a tip thereof is inclined to the flange side. One or more of the shape portions are integrally formed, and the fin-like portions are pushed down and press-fitted into the long groove openings of the concrete structure.

    In the present invention, it is prevented from slipping out by press-fitting into the opening of the long groove in the center of the back surface of an elongated flat plate-like flange having a width wider than the opening width of the long groove for inserting the anode material formed in the reinforced concrete structure. Using a long groove opening closing tool integrally having a press fitting protrusion, and inserting the anode material into the long groove and then press-fitting the press fitting protrusion of the long groove opening closing tool into the long groove opening. By closing the long groove opening and then injecting filler into the long groove, even if the long groove is at an angle where it is difficult to fill the filler in plastering work, such as sideways or downwards. The filler can be easily and completely made by pumping.

  In addition, by closing the back of the flange to the surface of the reinforced concrete structure through the adhesive layer or adhesive layer, the long groove opening is more completely closed, and leakage during filling material injection work is eliminated. Can do.

  In addition, since a fastener such as an anchor is not used, the work can be performed without damaging the surface of the reinforced concrete structure.

  Further, in the present invention, as the long groove opening closing tool, a long groove opening closing member formed by arranging a large number of through holes opened through on the front and back in the center in the flange width direction is used. The long groove in which the adhesive tape is attached to the outer surface of the flange of the tool to close the through hole, and after inserting the anode material into the long groove, the long groove is closed with the adhesive tape in the opening of the long groove. The long groove opening is closed by press-fitting the press-fitting ridge of the opening closing tool, and then the filler is injected into the long groove, and after the filler is solidified, the adhesive tape is peeled off to open the through hole. By opening the part to the atmosphere, it is possible to open the surface of the filler to the atmosphere only by removing the tape after the filler is solidified, and to create a good anodic gas release state. it can.

  Further, by integrally providing a non-returning fin-shaped portion inclined toward the flange side on the side surface of the press-fitting ridge of the long-groove opening closing tool, it is easy to press-fit into the long groove. It can be difficult.

  Further, in the present invention, as the long groove opening closing device, a narrow groove having a depth extending from the center position in the width direction of the flange surface to the inside of the press-fitting ridge is formed continuously in the length direction, and the lower surface of the flange Use a taper shape in which both side edge sides are inclined downward, and after inserting an anode material into the long groove, a protrusion for press-fitting the long groove opening closure is inserted into the opening of the long groove. The long groove opening is closed by press-fitting, a filler is injected into the long groove, and the filler in the long groove is opened to the atmosphere by removing the long groove opening closing tool after the filler is solidified. By doing so, the entire area of the filler surface after the filler is solidified is opened to the atmosphere, so that the anode-generated gas can be released more effectively, and the removal operation of the long groove opening closing tool is facilitated.

  Next, an embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes an example of a long groove opening closing device used in the present invention. The long groove opening closing device 1 has a long, flat plate-like flange 2 and a long central portion in the width direction. It is comprised from the press-fit protrusion 3 integrally protruding toward the direction. The press-fitting ridge 3 is integrally formed with a non-return fin-like portion 4 that is inclined on both side surfaces from the ridge tip portion toward the flange edge side in the length direction. The fin-like portion 4 is formed on a wedge having a tapered cross section.

  In the long groove opening closure 1, an elongated through-hole 5 directed in the length direction is opened at regular intervals in the longitudinal direction of the long groove opening closure at the central portion in the width direction of the flange 2. . In addition, in the position where this through-hole 5 exists, the press-fit protrusion on the back surface of the flange 2 is in a missing state.

  In addition, the adhesive tape 6 is attached to the surface of the flange 2 of the long groove opening closing tool 1 over the entire length in advance to close the flange surface side opening of the through-hole 5, and both wing portions 2 a and 2 a of the flange 2. The adhesive layer is adhered by adhering the double-sided adhesive tape 7 to the back surface of the adhesive.

  Next, a description will be given of an example of an electrode protection electrode installation method for the reinforced concrete structure of the present invention using the long groove opening closing device 1 as described above. As shown in FIG. A long groove 11 for installing an anode material is formed on the surface of the object 10. The long groove is formed by cutting in the same manner as in the prior art described above.

  Next, the anode material 12 is inserted into the long groove 11 and is held so as not to fall out of the long groove 11 using, for example, an elastic holder 13 having a C-shaped cross section as shown in the figure. Thereafter, with the above-mentioned long groove opening closure 1 attached to the surface of the flange 2 with the adhesive tape 6 adhered, the press-fitting ridge 3 is the opening of the long groove 11 and the back surface of the flange 2 is a structure. It press-fits until it adheres to the surface of 10, and the back surface of the flange 2 is adhered to the surface of the reinforced concrete structure by the adhesive layer of the double-sided adhesive tape 7.

  After closing the opening of the long groove 11 with the long groove opening closing tool 1 in this way, the filler injection pipe 15 is communicated with an appropriate position of the long groove 11 and the press fitting pump 16 is used to cause no contraction into the long groove 11. A filler 17 made of a cement-based solidifying material such as mortar or cement milk is injected.

  After the filling material 17 is injected, the adhesive tape 6 attached to the flange surface is peeled off after the filler 17 is solidified, and the screen side opening of the through hole 5 is opened to the atmosphere. Thus, when the anode material 12 is used as an anti-corrosion, the oxygen gas generated by the anode is released to the atmosphere through the through hole 5.

  In addition, although the long groove opening part closing tool 1 mentioned above uses what was formed with the elastic material which consists of a synthetic resin material as an example, it is in the long groove of concrete structures, such as another rubber-like elastic material. Any material may be used as long as it has an elastic force capable of closing the opening of the long groove against the injection pressure when the filler is injected into the long groove in the pressed state.

  In addition, the adhesive or pressure-sensitive adhesive used for the adhesive layer or the pressure-sensitive adhesive layer adheres or sticks to the long groove opening closing tool 1 and adheres closely to the surface of the concrete structure. Any material that can close the gap may be used.

An example of the long groove opening part closing tool used for this invention method is shown, (a) is a top view, (b) is a front view, (c) is a side view. It is sectional drawing of the state which inject | poured the filler in the long groove | channel in the method of this invention. It is sectional drawing which shows a filler injection process same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Long groove opening part closing tool 2 Flange 3 Press-in protrusion 4 Fin part for a non-returning 5 Through hole 6 Adhesive tape 7 Double-sided adhesive tape 10 Reinforced concrete structure 11 Long groove for anode material installation 12 Anode material 13 Elastic holder 15 Filling Material injection pipe 16 Press-in pump 17 Filler

Claims (4)

A long groove is formed on the surface of the reinforced concrete structure, an anode material is inserted into the long groove, and a filler made of a cement-based solidifying material is injected into the long groove, thereby preventing electrical protection against a reinforced concrete structure in which the anode material is embedded. In the edible electrode installation method,
At the center of the back surface of the elongated flat plate-like flange having a width wider than the opening width of the long groove, a press-fitting ridge that is prevented from coming off by being press-fitted into the opening of the long groove is integrated, and the flange width direction In the center, using a long groove opening closing tool formed by arranging a large number of through holes in the front and back in the length direction,
Adhering an adhesive tape to the flange outer surface side of the long groove opening closing tool to close the through hole,
The press fitting protrusion of the long groove opening closing tool is inserted into the long groove after inserting the anode material into the long groove, and the back surface of the flange is reinforced with an adhesive layer or an adhesive layer. Close the long groove opening by closely contacting the structure surface,
After that, a filler is injected into the long groove, and after the filler is solidified, the adhesive tape is peeled off to open the opening of the through hole to the atmosphere. . The method for installing an electrode for cathodic protection on a reinforced concrete structure according to claim 1, wherein the press-fitting protrusion has integrally formed on its side surface a fin-shaped portion inclined toward the flange side. In the center of the back surface of the flat flange, there is an integral press-fitting ridge that is prevented from coming off by press-fitting into the opening of the long groove formed on the surface of the reinforced concrete structure. A large number of through-holes opened through are formed side by side in the length direction,
A narrow groove having a depth extending from the center position in the width direction to the inside of the press-fitting ridge is continuously formed in the length direction on the surface of the flange, and the lower surface of the flange is inclined downward on both side edges. Formed into a tapered shape,
An electrode-protecting long groove opening closing device, which is formed by sticking a peelable adhesive tape on the outer surface side of the flange and closing the through hole. On both side surfaces of the press-fitting ridge, one or a plurality of fin-shaped portions, each having a tapered shape with a tapered cross-section and inclined toward the flange side, are formed, and the fin-shaped portions are pushed down. 4. The electrode protection long groove opening closure according to claim 3, wherein the electrode is inserted into the long groove opening of the concrete structure.

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