JP2011153500A - Method for peeling mortar layer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for peeling a mortar layer, which enables the mortar layer to be efficiently and easily peeled from the surface of a concrete skeleton. <P>SOLUTION: A plurality of locking portions 1 for a peeling implement are formed in the mortar layer 101; and the mortar layer 101 is cut off in such a manner as to surround each of the locking portions 1, and formed while being partitioned into a plurality of cut compartment portions 3 via a cut portion 31. A cured resin layer 2 is formed by adhering to almost the whole surface of the mortar layer 101. A mortar layer peeling implement 201 is operated while being locked to the locking portion 1, so that the cut compartment portion 3 surrounding the locking portion 1 can be pulled apart from the surface of the concrete skeleton 100 and peeled. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a mortar layer peeling method for peeling a mortar layer on the surface of a concrete frame.

  In many cases, mortar is applied to the surface of the concrete frame of a concrete building. The mortar layer may need to be peeled off, for example, when repairing or reinforcing a concrete frame, or for newly applying mortar due to deterioration of the mortar layer itself.

  As a method of peeling such a mortar layer, for example, Patent Document 1 discloses a method using a mortar layer peeling tool. This peeling tool includes a hydraulic cylinder, an expansion needle (expansion operation rod), and a cylindrical body whose tip can be expanded. Then, in the mortar layer, a peeling tool locking hole for locking the peeling tool (peeling tool locking portion) is formed, and the distal end side of the cylindrical body is put into the peeling tool locking hole. The hydraulic cylinder is operated, and the ram provided in the hydraulic cylinder is driven forward. As a result, the expanding rod moves forward in the cylindrical body, and the tapered distal end of the expanding rod pushes into the distal end of the cylindrical body as the expanding rod advances. The portion is pushed outward in the outer peripheral direction to cause cracks in the mortar layer. Further, the tip of the expansion operation rod hits the concrete housing at the bottom of the locking hole, and then the tubular body moves backward relative to the expansion operation rod, and this retreating force causes the surface of the concrete housing to retreat. Peeling occurs in the mortar layer, and in combination with the spreading force, the mortar layer is easily cracked and peeled off.

JP 2002-70330 A

  However, in the peeling method disclosed in Patent Document 1, for example, as shown in FIG. 7, the peripheral portion of the peeling tool locking hole 110 in the mortar layer 101 is a small piece of broken piece 112 due to the crack 111 generated. There is a possibility that a part of the mortar layer is left between the adjacent locking holes 110 for the peeling tool. Moreover, since the broken pieces 112 are broken into pieces and scattered, the work of cleaning up the pieces of scattered pieces is troublesome, and dust may be generated during the work, and the peeling work may be difficult.

  In this case, it is conceivable to form the peeling tool locking holes 110 so that adjacent ones are close to each other. In that case, however, a large number of peeling tool locking holes 110 must be formed. In addition, the peeling tool has to be locked and operated for each of the peeling tool locking holes 110, resulting in a long working time and poor working efficiency.

  An object of this invention is to provide the peeling method of the mortar layer which can peel a mortar layer efficiently and easily from the surface of a concrete frame.

  In order to solve the above-mentioned problem, the invention of claim 1 is a mortar layer peeling method for peeling a mortar layer formed on a concrete frame surface from the concrete frame surface using a mortar layer peeling tool, wherein the mortar layer In addition, a plurality of release tool locking portions for locking the mortar layer peeling tool are formed so as to have a distance from each other, and the mortar layer is formed so as to surround each of the peeling tool locking portions. And forming the mortar layer into a plurality of cut compartments by the cut portion, and forming the cured resin layer on the surface side of the mortar layer so as to adhere to substantially the entire surface. The mortar layer peeling tool is locked to the locking part for the peeling tool, and the locking part for the peeling tool is surrounded by operating the locked mortar layer peeling tool. Sectional partition portion providing a step of peeling away from the concrete skeleton surface, a method of removing the mortar layer, which comprises a.

  The invention of claim 2 is the method for peeling a mortar layer according to claim 1, wherein the cured resin layer contains a fibrous material.

  According to the first aspect of the present invention, the mortar layer peeling tool is locked to the locking portion for the peeling tool, and the locked mortar layer peeling tool is pulled, for example. At that time, since the cutting section of the mortar layer surrounding the separation portion for the peeling tool is cut from the other cutting section, the entire cutting section is easily pulled away from the concrete frame surface and peeled off. Can do. Further, since the cured resin layer is formed on the surface of the mortar layer, the peripheral portion of the peeling tool locking portion in the mortar layer can be made difficult to break into small pieces. Moreover, even if the peripheral part of the latching part for peeling tools in a mortar layer breaks into small pieces of broken pieces, the broken pieces can be held together by the cured resin layer.

  Therefore, the mortar layer can be sequentially peeled from the surface of the concrete frame for each cut section. Therefore, the mortar layer can be reliably peeled from the surface of the concrete housing without leaving, and the amount of the mortar layer that can be peeled off by locking the mortar layer peeling tool to one peeling tool locking part is formed as a cutting partition part. As compared with the case where it is not, it can be increased and the peeling work can be made efficient.

  In addition, since the peripheral part of the locking hole for the peeling tool is not broken and scattered into small pieces of broken pieces, dust can be prevented from being generated, and it is not necessary to carry out the work of cleaning up the broken pieces. The peeling work can be easily performed.

  According to the second aspect, since the cured resin layer includes a fibrous material, the cured resin layer can be reinforced so as not to be divided. Thereby, it is possible to make the mortar layer difficult to break. In addition, even if the peripheral portion of the release tool locking hole in the mortar layer breaks into small pieces, the cured resin layer can be securely connected, and the entire cutting section can be reliably Can be peeled off from the surface of the concrete frame.

In the mortar layer peeling method of the present invention, the front surface of a part of the mortar layer in a state in which the mortar layer is formed with a locking hole for a peeling tool and a cured resin layer, and the mortar layer is partitioned into a plurality of cut sections. FIG. It is the II-II sectional view taken on the line of FIG. It is sectional drawing of the mortar layer peeling tool of one Embodiment used for the peeling method of the mortar layer of this invention. It is a principal part expanded sectional view of the state which put the front-end | tip part of the cylindrical body of the mortar layer peeling tool in the latching | locking part for peeling tools. The rod for expanding the mortar layer peeling tool is moved relative to the cylindrical body from the state shown in FIG. 4 so that the tip of the cylindrical body is expanded and locked to the inner peripheral wall of the locking hole for the peeling tool. It is a principal part expanded sectional view. FIG. 6 is an enlarged cross-sectional view of a main part in a state in which the expansion operation rod is further moved with respect to the cylindrical body from the state of FIG. 5. It is explanatory drawing at the time of peeling a mortar layer with the conventional method.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 shows a mortar layer peeling method according to the present invention, in which a mortar layer in a state in which a mortar layer is formed into a plurality of cut compartments while a release tool locking hole and a cured resin layer are formed in the mortar layer. FIG. 2 is a partial front view, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

  As shown in FIG. 1 and FIG. 2, the mortar layer peeling method of the present invention first forms a plurality of peeling tool locking portions 1 and cured resin layers 2 on the mortar layer 101, and the mortar layer 101 is formed. A section is formed in a plurality of cut sections 3.

  The peeling tool locking portion 1 is for locking a mortar layer peeling tool 201 described later, and the peeling tool locking portion 1 of this embodiment penetrates the mortar layer 101 in the thickness direction. The inner peripheral wall of the hole 11 formed in a circular shape.

  Moreover, the latching | locking part 1 for peeling tools is arrange | positioned in the approximate center part of the cutting division part 3, respectively. In addition, although it is preferable to arrange | position the latching | locking part 1 for peeling tools in the approximate center part of the cutting division part 3, it may be arrange | positioned in the position biased from the center of the cutting division part 3, It can be changed as appropriate.

  The cured resin layer 2 is for making the mortar layer 101 difficult to break, and for holding the broken pieces even when the mortar layer 101 breaks into small pieces of broken pieces. It is composed of materials that are difficult to break. In this embodiment, it is comprised from what has the resin material 21 and a fibrous material.

  As the resin material 21, for example, a material mainly composed of an epoxy resin can be used. The fibrous material is for increasing the breaking strength of the cured resin layer 2. In this embodiment, the cloth member 22 made of the fibrous material is used.

  The cured resin layer 2 is formed with a predetermined thickness on the entire surface of the mortar layer 101 as follows, for example. First, an uncured liquid resin material 21 is applied to the entire surface of the mortar layer 101. Then, the cloth member 22 is disposed so as to cover the substantially entire surface of the mortar layer 101 so as to cover the applied resin material 21. Furthermore, the resin material 21 is applied to the cloth member 22 and the resin material 21 is cured.

  Thereby, when the resin material 21 hardens | cures, the cured resin layer 2 which has the cloth member 22 can be adhere | attached and laminated | stacked on the whole surface of the mortar layer 101 with the adhesiveness which the resin material 21 has.

  The thickness of the cured resin layer 2 is not particularly limited, and the mortar layer 101 is difficult to break. When the mortar layer 101 is broken into small pieces, the pieces are connected. Any thickness that can be retained is acceptable. In this embodiment, it is about 3 mm to 10 mm.

  The cutting partition part 3 cuts the entire periphery of each of the peeling tool locking parts 1 in the mortar layer 101 so as to surround each of the peeling tool locking parts 1, and the cutting part 31 engages with one peeling tool lock. A section having a stop 1 is formed. Accordingly, the same number of cutting partition portions 3 as the release tool locking portions 1 are formed.

  In this embodiment, a plurality of cut portions 31 are formed in the mortar layer 101 in the vertical and horizontal directions using a dry diamond cutter having a forced dust absorber, so that the entire mortar layer 101 is divided into a plurality of rectangular cut partition portions 3. The partition is formed.

  In addition, the shape of the cutting partition part 3 is not specifically limited, For example, it can change suitably, such as forming in a rhombus shape.

  After forming the release tool locking portion 1, the cured resin layer 2, and the cutting partition portion 3 on the mortar layer 101 as described above, the mortar layer peeling tool 201 is used. Here, the mortar layer peeling tool 201 used in the present invention will be described.

  As shown in FIG. 3, the mortar layer peeling tool 201 includes a peeling tool main body 202, a cylindrical body 203 provided on the distal end side of the peeling tool main body 202, and an expansion provided in the cylindrical body 203. And an operation rod 204.

  In this embodiment, the peeling tool main body 202 is composed of a hydraulic cylinder, and includes a cylinder portion 221, a piston 222 disposed in the cylinder portion 221, and a piston rod 223 connected to the piston 222. .

  The cylinder part 221 includes a hydraulic circuit 221a for flowing oil as a fluid. The hydraulic circuit 221a is provided with a cylindrical fluid pressurizing means connecting member 221b. Then, a hydraulic pump (not shown) as a fluid pressurizing means is connected to the fluid pressurizing means connecting member 221b via a pipe or the like (not shown), so that a hydraulic circuit is operated along with the operation of the hydraulic pump. Oil flows through 221a.

  Further, due to the flow of oil, the piston 222 and the piston rod 223 receive hydraulic pressure (fluid pressure), and move in the cylinder portion 221 in the axial direction of the cylinder portion 221 (XY direction in FIG. 3).

  The cylindrical body 203 includes a cylindrical body main body 205 and a protrusion 206 provided at an axial tip of the cylindrical body main body 205 (X direction in FIG. 1). The cylindrical body main body 205 is provided with an expanded portion 251 on the distal end side in the axial direction.

  The expanded portion 251 is provided with a plurality of (four in this embodiment) slits 252 that are cut in a predetermined length and a predetermined width along the axial direction from the tip. The expanded portion 251 is divided into four divided pieces 253 by these slits 252.

  Further, the widened portion 251 includes a small diameter portion 254 that gradually decreases in diameter toward the distal end on the inner peripheral side of the distal end side, and the small diameter portion 254 is pressed from the inner peripheral side to the outer peripheral side. If it does, it will expand in the outer peripheral direction of the expansion part 251. FIG.

  The cylindrical body 205 is connected at its proximal end to the axial distal end of the cylinder portion 221. In this embodiment, the screws provided on the two are connected to each other so that the cylindrical body main body 205 has its axis aligned with the axis of the cylinder 221 and the cylinder 221. It protrudes to the tip side.

  The protrusion 206 is provided so as to protrude in the outer circumferential direction on the entire circumferential direction of the distal end portion of the outer peripheral surface 253 a of each of the divided pieces 253 of the cylindrical body main body 205, and extends substantially over the entire circumference of the cylindrical body main body 205. It is arranged.

  Further, the protrusion 206 is configured such that the protrusion height from the outer peripheral surface 253a increases as it goes toward the distal end side (X direction in the figure) of the split piece 253 of the cylindrical body main body 205. In this embodiment, the protrusion 206 is configured to have a curved surface 261 that is recessed on the tip side, and has a pointed portion 262 that has a sharp tip.

  The expansion operation rod 204 is for performing an expansion operation on the distal end side of the cylindrical body main body 205. In this embodiment, the expansion operation rod 204 is formed of a cylindrical shape. The outer diameter of the expanding operation rod 204 is formed larger than the small diameter portion 254 of the cylindrical body main body 205.

  Further, the expansion operation rod 204 is provided with a pressing operation portion 241 for pressing the small diameter portion 254 of the expansion portion 251 on the distal end side. The pressing operation portion 241 of this embodiment is formed in a tapered shape with a gradually decreasing diameter on the tip side.

  And the base end side of this expansion operation rod 204 is connected to the tip of the piston rod 223 of the peeling tool main body 202. In this embodiment, a female screw portion is provided on the proximal end side of the expansion operation rod 204, and the female screw portion is connected so as to be screwed to a male screw portion provided on the piston rod 23. Has been.

  In this connected state, the expansion operation rod 204 is disposed in the cylindrical body main body 205 in a state in which the axial centers thereof are aligned with the respective axial centers of the piston rod 223 and the cylindrical body main body 205. Then, as the piston rod 223 moves, the expansion operation rod 204 has the pressing operation portion 241 immersed in the cylindrical body main body 205 and contacted with the small diameter portion 254 of the expansion portion 251 as shown in FIG. 4 to the state shown in FIG. 6 that protrudes by a predetermined length toward the distal end side of the expanding portion 251 so as to be able to appear and retract in the axial direction with respect to the cylindrical body 203.

  In order to peel the mortar layer 101 using the mortar layer peeling tool 200 configured as described above, as shown in FIG. 4, the protrusion 206 and the expansion part 51 of the cylindrical body 203 of the mortar layer peeling tool 200 are provided. Then, it is inserted into the peeling tool locking portion 1 formed on the mortar layer 101 until the tip surface of the cylindrical body 203 hits the concrete housing 100.

  From this state, the hydraulic pump is operated to move the piston rod 223 (see FIG. 1) to the distal end side, and the expansion operation rod 204 is moved to the distal end side in the cylindrical body 203. As a result, as shown in FIG. 5, the pressing operation portion 241 of the expansion operation rod 204 slides the small diameter portion 254 of the expansion portion 251 toward the distal end side.

  When the sliding is performed, the expanding portion 251 is pressed by the pressing operation portion 241 from the inside to expand radially outward (outer peripheral direction), and the diameter of the protrusion 206 is expanded. Further, when the diameter of the projecting portion 206 increases, the sharpened portion 262 of the projecting portion 206 enters the boundary 104 between the concrete housing 100 and the mortar layer 101, and the curved surface 261 of the projecting portion 206 relates to the peeling tool for the mortar layer 101. The stopper 1 is engaged with the inner peripheral wall and the peripheral edge at the back of the stopper 1.

  Further, when the expansion operation rod 204 moves relative to the cylindrical body 203, the tip end surface of the expansion operation rod 204 comes into contact with the concrete housing 100. If the expansion operation rod 204 is further moved relative to the cylindrical body 203 from this state, the expansion operation rod 204 increases the amount of protrusion from the cylindrical body 203 as shown in FIG. Since the rod 204 does not move due to contact with the concrete housing 100, the projection 206 of the tubular body 203 moves relative to the expansion operation rod 204 and moves away from the concrete housing 100.

  At that time, since the tapered surface 61 of the protrusion 206 is locked to the mortar layer 101, the mortar layer 101 can be pulled in a direction to be separated from the concrete housing 100. In addition, since the cutting section 3 of the mortar layer 101 surrounding the release tool locking section 1 is cut from other cutting sections, the entire cutting section 3 can be easily pulled away from the concrete body surface 100. Can be peeled off. Moreover, since the cured resin layer 2 is formed on the surface of the mortar layer 101, the mortar layer 101 can be hardly broken. Further, even if the peripheral portion of the peeling tool locking portion 1 of the mortar layer 101 is broken into small pieces of broken pieces, the broken pieces can be held together by the cured resin layer 2.

  Therefore, the mortar layer 101 can be sequentially peeled from the concrete housing surface 100 for each cutting section 3. Therefore, the mortar layer 101 can be reliably peeled from the surface of the concrete housing 100 without leaving, and the amount of the mortar layer that can be peeled off by locking the mortar layer peeling tool 200 to one peeling tool locking portion 1 is cut. Compared with the case where the partition part 3 is not formed, the number can be increased, and the peeling work can be performed efficiently.

  Further, since the peripheral portion of the peeling tool locking portion 1 in the mortar layer 101 is not broken and scattered into small pieces of broken pieces, it is possible to prevent the generation of dust and to perform the work of cleaning up the broken pieces. It is possible to make the peeling work simple.

  In the above-described embodiment, the cured resin layer 2 is formed after the cutting partition portion 3 is formed in the mortar layer 101, and then the peeling tool locking portion 1 (hole 11) is formed. The order of the formation of the release tool locking portion 1, the cured resin layer 2, and the cutting partition portion 3 is not particularly limited.

  For example, the cured resin layer 2 may be formed on the entire surface of the mortar layer 101 before the holes 11 are formed, and then the holes 11 may be formed in the mortar layer 101 together with the cured resin layer 2. However, if the cutting partition portion 3 is formed before the release tool locking portion 1 (hole 11) is formed, and then the release tool locking portion 1 (hole 11) is formed, the release tool. It is preferable at the point which becomes easy to form the latching | locking part 1 (hole 11) for the center of the cutting division part 3 visually.

  Alternatively, the cutting section 3 having a predetermined size may be formed on the entire mortar layer 101 before the hole 11 is formed, and then the hole 11 may be formed in each of the cutting section 3.

  Moreover, in the said embodiment, although the fabric member 22 formed in the sheet form is used as a fibrous material of the cured resin layer 2, it is not restricted to this form, It can change suitably. For example, what made the resin material 21 interspersed with a fibrous material may be used. The material of the fibrous material to be used is not particularly limited.

  Further, the cured resin layer 2 is not limited to a form including a fibrous material, and may be composed of only a resin material 21 not including a fibrous material, and can be appropriately changed.

  Moreover, in the said embodiment, although the cutting division part 3 is formed from the thing whose length of one side is a magnitude | size of about 50 cm, it can be peeled from the concrete frame 100 by operation of the mortar layer peeling tool 201, for example. Any size is acceptable and can be changed as appropriate.

  Moreover, in the said embodiment, although the thing provided with the cylindrical body 203 which has the protrusion 206 is used as a mortar layer peeling tool, the thing which does not have the protrusion 206 may be used. In addition, the mortar layer peeling tool used in the present invention is not limited to the above-described embodiment, and can be changed as appropriate. For example, the peeling tool can be locked to the peeling tool locking portion 1 and can be manually pulled in the locked state. It may be anything.

DESCRIPTION OF SYMBOLS 1 Locking part for peeling tools 2 Hardened resin layer 3 Cutting division part 100 Concrete frame 101 Mortar layer 201 Mortar layer peeling tool

Claims (2)

A mortar layer peeling method for peeling a mortar layer formed on a concrete frame surface using a mortar layer peeling tool from the concrete frame surface,
A plurality of peeling tool locking portions for locking the mortar layer peeling tool are formed on the mortar layer so as to have a distance from each other, and so as to surround each of the peeling tool locking portions. Cutting the mortar layer and partitioning the mortar layer into a plurality of cutting sections by the cut portions; and
Forming a cured resin layer on the surface side of the mortar layer so as to adhere to substantially the entire surface;
The mortar layer peeling tool is locked to the peeling tool locking part, and the cutting section surrounding the peeling tool locking part is operated by operating the locked mortar layer peeling tool. A step of separating from and peeling off,
A method for stripping a mortar layer, comprising:   The method for peeling a mortar layer according to claim 1, wherein the cured resin layer contains a fibrous material.

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