JP2009115586A - Apparatus and method for irregularity measurement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an irregularity measuring apparatus and an irregularity measuring method capable of quantitatively measuring irregularities of a surface of a hole wall and improving the reliability of reinforcement of existing concrete structures. <P>SOLUTION: The irregularity measuring apparatus 2 is provided with a rack 3; a slide axis part 4 slide-freely inserted in a guide hole 3a of the rack 3 to vertically move; and an irregularity measuring means for measuring the shape of irregularities of a surface of a hole wall 1b of an insertion hole 1a of an existing concrete structure 1. The irregularity measuring means is provided with both a first measuring means comprising both a contact 5a to come into contact with the surface of the hole wall 1b and a first displacement gauge 5 for measuring movement displacements of the contact 5a in a horizontal direction and a second measuring means comprising a second displacement gauge 6 for measuring movement displacements of the slide axis part 4 in a vertical direction. By vertically moving the slide axis part while bringing the contact into contact with the surface of the hole wall, it is possible to quantitatively measure the shape of irregularities of the surface of the hole wall along the depth direction of the insertion hole. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a concavo-convex measuring apparatus and a concavo-convex measuring method for measuring the concavo-convex shape of a hole wall surface of an insertion hole for inserting an anchor member formed in an existing concrete structure.

For example, when the bending load capacity and shear load capacity of existing concrete structures such as footings and transmission tower foundations are insufficient, a reinforcing anchor member is inserted into an insertion hole formed in the existing concrete structure and adhesion of mortar or the like is performed. By filling the agent, the anchor member may be fixed in the insertion hole to reinforce the existing concrete structure.
When reinforcing such an existing concrete structure, as described in Patent Document 1, for example, it is inserted by forming a spiral groove on the surface of the hole wall of the insertion hole into which the anchor member is inserted. Forming irregularities on the hole wall surface of the hole is performed. Thereby, the adhesion strength at the interface between the hole wall surface of the insertion hole and the adhesive can be increased, and the anchor member can be prevented from coming out.
Japanese Patent No. 3404301

  However, when evaluating the degree of unevenness of the hole wall surface of the insertion hole as described above, for example, it is qualitatively performed by fiberscope observation, visual observation, fingertip feeling, etc. Differences can occur.

  An object of the present invention is to provide an unevenness measuring apparatus and an unevenness measuring method capable of quantitatively measuring the unevenness of the hole wall surface and improving the certainty of reinforcement of an existing concrete structure. .

The invention described in claim 1 is for measuring the uneven shape of the surface of the hole wall 1b of the insertion hole 1a for anchor member insertion formed in the existing concrete structure 1 as shown in FIGS. An unevenness measuring apparatus 2,
A gantry 3 which has a guide hole 3a formed penetrating along the thickness direction and which is installed and fixed on the surface of the existing concrete structure 1 such that the guide hole 3a is located above the insertion hole 1a. ,
A slide shaft portion 4 that is slidably inserted into the guide hole 3a and moves vertically along the axial direction of the insertion hole 1a;
An unevenness measuring means for measuring the unevenness shape of the surface of the hole wall 1b of the insertion hole 1a,
The unevenness measuring means is provided at the lower end portion of the slide shaft portion 4, contacts the surface of the hole wall 1 b, and moves horizontally according to the unevenness of the surface of the hole wall 1 b, and the slide shaft portion A first measuring means that is provided at the upper end portion of the first displacement gauge 4 and has a first displacement meter 5 connected to the contact 5a for measuring the horizontal displacement of the contact 5a;
And a second measuring means connected to the slide shaft portion 4 and comprising a second displacement meter 6 for measuring the displacement of the slide shaft portion 4 in the vertical direction.

  According to the first aspect of the present invention, the unevenness measuring means is provided at the lower end of the slide shaft portion, contacts the hole wall surface, and moves horizontally according to the unevenness of the hole wall surface. A first measuring means provided on the upper end of the slide shaft portion and connected to the contact for measuring the displacement of the contact in the horizontal direction; and the slide And a second measuring means comprising a second displacement meter connected to the shaft portion and measuring a vertical displacement of the slide shaft portion, so that the surface of the hole wall of the insertion hole is formed by the first measuring means. And the depth of the insertion hole can be measured by the second measuring means. Therefore, the uneven shape of the hole wall surface can be quantitatively measured along the depth direction of the insertion hole by vertically moving the slide shaft portion while bringing the contactor into contact with the hole wall surface. It is possible to improve the certainty of reinforcement of the existing concrete structure.

  In the invention described in claim 2, for example, as shown in FIGS. 1 and 2, in the unevenness measuring apparatus 2 described in claim 1, the length of the contact 5a is shorter than the diameter of the insertion hole 1a. It is characterized by being set.

  According to invention of Claim 2, since the length of the said contactor is set shorter than the diameter of the said insertion hole, this contact is made, making one end of the said contactor contact the said hole wall surface. The other end of the child can be separated from the hole wall surface. As a result, when the contactor moves horizontally while bringing one end of the contactor into contact with the hole wall surface, the other end of the contactor does not contact the hole wall surface. The contact can be smoothly moved horizontally without being caught in the insertion hole.

The invention according to claim 3, for example, as shown in FIGS. 1 to 3, measures unevenness on the surface of the hole wall 1 b of the insertion hole 1 a for inserting the anchor member formed in the existing concrete structure 1. A method,
While installing and fixing the gantry 3 on the surface of the existing concrete structure 1, the guide hole 3a formed so as to penetrate along the thickness direction of the gantry 3 is positioned above the insertion hole 1a,
At the lower end of the slide shaft portion 4 that moves vertically along the axial direction of the insertion hole 1a, a contact 5a that moves horizontally according to the unevenness of the surface of the hole wall 1b is provided in advance, and the slide shaft portion A first displacement meter 5 that measures the horizontal displacement of the contact 5a is provided at the upper end of the contact 4a, and a second displacement meter 6 that measures the vertical displacement of the slide shaft portion 4 is provided. Is connected to the slide shaft portion 4,
After the slide shaft portion 4 is inserted into the guide hole 3a, the slide shaft portion 4 is vertically moved while the contact 5a is in contact with the surface of the hole wall 1b.

  According to the invention of claim 3, after inserting the slide shaft portion into the guide hole, the slide shaft portion is vertically moved while the contactor is in contact with the hole wall surface. The first measuring means can measure the unevenness of the hole wall surface of the insertion hole, and the second measuring means can measure the depth of the insertion hole. The concavo-convex shape of the hole wall surface can be quantitatively measured along the direction, and the certainty of reinforcement of the existing concrete structure can be improved.

  According to the present invention, the concavo-convex measuring means for measuring the concavo-convex shape of the hole wall surface of the insertion hole of the existing concrete structure is provided at the lower end portion of the slide shaft portion that vertically moves along the axial direction of the insertion hole, A contact that contacts the surface of the hole wall and moves horizontally according to the unevenness of the surface of the hole wall, and a horizontal displacement of the contact that is provided at the upper end of the slide shaft and connected to the contact. A first measuring means having a first displacement meter for measuring the second measuring means, and a second measuring means connected to the slide shaft portion and comprising a second displacement meter for measuring the vertical displacement of the slide shaft portion. Therefore, the unevenness of the hole wall surface of the insertion hole can be measured by the first measurement means, and the depth of the insertion hole can be measured by the second measurement means. Therefore, by moving the slide shaft vertically while bringing the contactor into contact with the hole wall surface, the concave-convex shape of the hole wall surface can be quantitatively measured along the depth direction of the insertion hole. It is possible to improve the certainty of reinforcement.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 and 2, the unevenness measuring apparatus 2 in the present embodiment measures the uneven shape on the surface of the hole wall 1b of the insertion hole 1a for inserting the anchor member formed in the existing concrete structure 1. It has a guide hole 3a formed penetrating along the thickness direction, and is fixed on the surface of the existing concrete structure 1 so that the guide hole 3a is located above the insertion hole 1a. The pedestal 3 is slidably inserted into the guide hole 3a and vertically moved along the axial direction of the insertion hole 1a, and the uneven shape on the surface of the hole wall 1b of the insertion hole 1a. The unevenness measuring means is provided at the lower end portion of the slide shaft portion 4 and is in contact with the surface of the hole wall 1b to respond to the unevenness on the surface of the hole wall 1b. And a first displacement meter 5 provided at the upper end of the slide shaft portion 4 and connected to the contact 5a for measuring the horizontal displacement of the contact 5a. And a second measuring means connected to the slide shaft portion 4 and comprising a second displacement meter 6 for measuring the displacement of the slide shaft portion 4 in the vertical direction.

Here, the existing concrete structure 1 is, for example, a footing, a power transmission tower foundation, or the like, and an anchor member such as a reinforcing bar for imparting bending load resistance or shear load resistance to the existing concrete structure 1. However, it is designed to be installed later.
In order to insert the anchor member, the insertion hole 1a is formed in the existing concrete structure 1.

  A mortar for fixing the anchor member in the insertion hole 1a is filled between the anchor member inserted into the insertion hole 1a and the surface of the hole wall 1b. And the filled mortar will be solidified while biting into the unevenness on the surface of the anchor member and the unevenness on the surface of the hole wall 1b, preventing the anchor member from slipping out, and improving the reinforcing performance of the existing concrete structure 1. It is like that.

When forming irregularities on the surface of the hole wall 1b, for example, a hammer bit is used when drilling the insertion hole 1a, or a cutting bit capable of forming a spiral concave groove on the surface of the hole wall 1b is formed. In addition, it is possible to form irregularities with a high-pressure washing machine that jets high-pressure water.
In addition, the operation of forming irregularities on the surface of the hole wall 1b of the insertion hole 1a is referred to as roughening. Further, the roughing operation of the present embodiment is not limited to these.

  On the other hand, the gantry 3 of the unevenness measuring apparatus 2 of the present embodiment has the guide hole 3a formed so as to penetrate along the thickness direction of the gantry 3 as described above. Further, as shown in FIG. 1, the gantry 3 is provided with a plurality of legs 3b, and these legs 3b are located outside the opening of the insertion hole 1a.

  When the base 3 is installed and fixed on the surface of the existing concrete structure 1, a weight is attached to the leg 3 b or a bolt or the like is used to prevent the base 3 from moving. It is preferable to attach to the surface of the structure 1. That is, accurate measurement can be performed by fixing the gantry 3 so as not to move.

As shown in FIGS. 1 and 2, the slide shaft portion 4 is a long rod-like member, the first displacement meter 5 is provided at the upper end portion, and the contact 5a is provided at the lower end portion. Is provided.
The slide shaft portion 4 is slidably inserted into the guide hole 3a of the gantry 3 and moves vertically along the axial direction of the insertion hole 1a.

For example, the slide shaft portion 4 is slidable by reducing a friction coefficient of a contact surface between the slide shaft portion 4 and a holding member (not shown) that holds the slide shaft portion 4. The part 4 is set to be slidable by being sandwiched by a plurality of rollers (not shown).
In addition, the vertical movement of the slide shaft portion 4 may be performed automatically mechanically or manually.

  Further, it is preferable that an anti-blur member (not shown) that is externally attached to the slide shaft portion 4 is provided on the gantry 3 so that the slide shaft portion 4 does not move when the slide shaft portion 4 moves vertically. That is, the anti-shake member has a role of a rail for moving the slide shaft portion 4 straight in the vertical direction, and is sufficiently and firmly fixed to the gantry 3. As a result, accurate measurement can be performed.

Further, between the first displacement meter 5 provided at the upper end portion of the slide shaft portion 4 and the contact 5a provided at the lower end portion, an intermediate member 50 connecting the first displacement meter 5 and the contact 5a. Is provided inside the main body of the slide shaft portion 4. In addition, the said 1st displacement meter 5 is provided with the contactor 5b which moves vertically according to the vertical movement of the said intermediate member 50, as shown to Fig.2 (a).
Furthermore, the contact 5a includes a contact main body 51 that moves horizontally according to the irregularities of the hole wall 1b of the insertion hole 1a.
The contact 5a is provided on the slide shaft portion 4 via an elastic member (not shown), and the contact 5b is also provided on the first displacement meter 5 via an elastic member (not shown). ing. Therefore, these contactors 5a and 5b are set so as to return to their original positions after moving in the horizontal direction or the vertical direction by the elastic return force of the elastic member.

The intermediate member 50 and the contact body 51 are connected via a displacement direction changing mechanism 52 as shown in FIG. The displacement direction converting mechanism 52 of the present embodiment is formed in a substantially T shape and is rotatable about a support shaft 52a. Thereby, for example, when the contact main body 51 is retracted in the horizontal direction, one end of the displacement direction converting mechanism 52 that contacts the base end of the contact main body 51 is pushed, and the support shaft 52a is used as a center. The displacement direction converting mechanism 52 itself rotates. At this time, since the other end portion of the displacement direction changing mechanism 52 is in contact with the lower end portion of the intermediate member 50, the intermediate member 50 can be moved upward by the other end portion. Yes. Since the contact 5a and the intermediate member 50 are thus connected via the displacement direction converting mechanism 52, the contact 5b of the first displacement meter 5 also moves in the vertical direction, thereby the contact. The horizontal displacement of the child 5a can be measured. That is, the displacement direction conversion mechanism 52 converts the horizontal displacement of the contact 5a into a vertical displacement via the intermediate member 50, and transmits the converted vertical displacement to the first displacement meter 5 for measurement. It is.
In addition to the displacement direction conversion mechanism 52 of the present embodiment, for example, a displacement direction conversion mechanism using a gear, a cam, a link mechanism, or the like may be used.

  The slide shaft portion 4 is preferably set to be longer than the length obtained by adding the depth of the insertion hole 1 a and the height of the mount 3. That is, if the depth of the insertion hole 1a and the height of the mount 3 are longer than the length obtained by adding the contact hole 5a, the contact 5a provided at the lower end portion of the slide shaft portion 4 can reliably reach the lower portion of the insertion hole 1a. be able to.

1 and 2, the length of the contact 5a is set to be shorter than the diameter of the insertion hole 1a, and one end of the contact is brought into contact with the hole wall surface. However, the other end of the contact can be separated from the hole wall surface.
As a result, when the contactor moves horizontally while bringing one end of the contactor into contact with the hole wall surface, the other end of the contactor does not contact the hole wall surface. The contact can be smoothly moved horizontally without being caught in the insertion hole.

  On the other hand, as described above, the second displacement meter 6 is connected to the slide shaft portion 4 and measures the displacement of the slide shaft portion 4 in the vertical direction, and is installed on the upper surface of the gantry 3. ing. As shown in FIG. 1, the second displacement meter 6 is provided with a wire 6a, and the displacement can be measured by the wire 6a pull-out dimension and winding dimension.

  As shown in FIG. 1, the end of the wire 6a is connected to the slide shaft portion 4 as a measurement object, and is hooked on the pulley 6b in the middle of the wire 6a. Accordingly, the second displacement meter 6 can measure the vertical displacement of the slide shaft portion 4.

  Further, as shown in FIG. 1, the first and second displacement meters 5 and 6 are connected to a data logger 7 for recording measurement data measured by the first and second displacement meters 5 and 6. Based on the measurement data stored by the data logger 7, the uneven shape of the surface of the hole wall 1b of the insertion hole 1a can be calculated by an electronic computer or the like.

  Next, an unevenness measuring method for measuring the uneven shape on the surface of the hole wall 1b of the insertion hole 1a will be described.

  In the unevenness measuring method of the present embodiment, first, the gantry 3 is installed and fixed on the surface of the existing concrete structure 1 such that the guide hole 3a is positioned above the insertion hole 1a.

  In addition, the contact 5 a is provided in advance at the lower end of the slide shaft 4, the first displacement meter 5 is provided at the upper end of the slide shaft 4, and the second A displacement meter 6 is connected to the slide shaft portion 4 and installed on the upper surface of the gantry 3.

Subsequently, such a slide shaft portion 4 is slidably inserted into the guide hole 3 a of the gantry 3.
Since the first displacement meter is provided at the upper end portion of the slide shaft portion 4 and the contactor 5a is provided at the lower end portion, at least of the first displacement meter 5 and the contactor 5a. One may be set to a size that can be inserted into the guide hole 3a, and at least one may be attached after the slide shaft portion 4 is inserted into the guide hole 3a.

  Thereafter, the first measuring means measures the unevenness of the surface of the hole wall 1b of the insertion hole 1a by vertically moving the slide shaft portion 4 while bringing the contact 5a into contact with the surface of the hole wall 1b. At the same time, the depth of the insertion hole 1a is measured by the second measuring means. Thereby, the uneven shape on the surface of the hole wall 1b can be quantitatively measured along the depth direction of the insertion hole 1a.

  As described above, the unevenness measuring method is implemented, but the implementation procedure is not limited to this. That is, after the unevenness measuring device 2 is assembled, the mount 3 may be installed and fixed on the surface of the existing concrete structure 1.

  And the measurement result by the above uneven | corrugated measuring methods is recorded on the data logger 7 connected to the said 1st and 2nd displacement meters 5 and 6, and based on the recorded measurement data, the said insertion hole 1a The uneven shape on the surface of the hole wall 1b is calculated.

In addition, the measurement data measured by the first displacement meter 5 and the second displacement meter 6 can obtain results as shown in FIG.
That is, the surface of the hole wall 1b of the insertion hole 1a has an unevenness of 2.6 mm at a depth of 0 mm, an unevenness of 0.6 mm at a depth of 50 mm, and so on. It has become.

Moreover, the uneven | corrugated shape of the surface of the said hole wall 1b measured in this way can evaluate the adhesion strength by using the roughness R calculated by the following calculation formulas as an index. The value obtained by this calculation formula indicates the degree of unevenness on the surface of the hole wall 1b.
[a formula]
Roughness R = ∫ | f (z) | dz / L
z: depth f (z): distance from the approximate straight line to the measurement waveform dz: incremental distance in the depth direction L: measurement length

Further, depending on the level of the roughness R, the adhesion strength at the contact surface between the mortar filled in the insertion hole 1a and the surface of the hole wall 1b differs. That is, the higher the value of roughness R, the higher the adhesion strength, and it can withstand a strong load applied in the direction in which the anchor member is pulled out. On the other hand, the lower the value of roughness R, the weaker the adhesion strength, and it becomes impossible to withstand a strong load applied in the direction in which the anchor member is pulled out.
Therefore, the anchor member pull-out experiment is performed a plurality of times in advance, and the adhesion strength in the pull-out direction of the anchor member corresponding to each value of the roughness R is obtained as shown in FIG. Thereby, the obtained adhesion strength can be used as an index when evaluating the structural performance of the existing concrete structure 1 including the escape of the anchor member.

  According to the present embodiment, the first measuring means can measure the unevenness of the surface of the hole wall 1b of the insertion hole 1a, and the second measuring means measures the depth of the insertion hole 1a. The surface of the hole wall 1b is moved along the depth direction of the insertion hole 1a by vertically moving the slide shaft portion 4 while bringing the contact 5a into contact with the surface of the hole wall 1b. Thus, it is possible to quantitatively measure the uneven shape, and it is possible to improve the certainty of reinforcement of the existing concrete structure 1.

It is a front view which shows an example of the unevenness | corrugation measuring apparatus of this invention. 1A and 1B are cross-sectional views showing the vicinity of the upper end portion of the slide shaft portion, and FIG. 1B is a cross-sectional view showing the vicinity of the lower end portion of the slide shaft portion. It is a graph which shows the measurement result obtained by the unevenness | corrugation measuring apparatus of FIG. It is a graph which shows the relationship between roughness and adhesion strength.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing concrete structure 1a Insertion hole 1b Hole wall 2 Concavity and convexity measuring device 3 Base 3a Guide hole 4 Slide shaft part 5 First displacement meter 5a Contact 6 Second displacement meter

Claims (3)

An unevenness measuring device for measuring the uneven shape of the hole wall surface of the insertion hole for inserting an anchor member formed in an existing concrete structure,
A pedestal that is installed and fixed on the surface of the existing concrete structure such that the guide hole is formed through the thickness direction, and the guide hole is positioned above the insertion hole.
A slide shaft that is slidably inserted into the guide hole and vertically moves along the axial direction of the insertion hole;
It has an unevenness measuring means for measuring the uneven shape of the hole wall surface of the insertion hole,
The unevenness measuring means is provided at a lower end portion of the slide shaft portion, contacts a surface of the hole wall, and moves horizontally according to the unevenness of the hole wall surface, and an upper end portion of the slide shaft portion. A first measuring means provided with a first displacement meter connected to the contact and measuring a horizontal displacement of the contact;
An unevenness measuring apparatus, comprising: a second measuring means connected to the slide shaft portion and comprising a second displacement meter for measuring a vertical displacement of the slide shaft portion.   The unevenness measuring apparatus according to claim 1, wherein a length of the contact is set to be shorter than a diameter of the insertion hole. An unevenness measuring method for measuring an uneven shape of a hole wall surface of an insertion hole for inserting an anchor member formed in an existing concrete structure,
While installing and fixing a pedestal on the surface of the existing concrete structure, a guide hole formed so as to penetrate along the thickness direction of the pedestal is positioned above the insertion hole,
At the lower end of the slide shaft that vertically moves along the axial direction of the insertion hole, a contact that moves horizontally according to the unevenness of the surface of the hole wall is provided in advance, and at the upper end of the slide shaft. A first displacement meter for measuring a horizontal displacement of the contact is provided, and a second displacement meter for measuring a vertical displacement of the slide shaft portion is connected to the slide shaft portion. And
After the slide shaft portion is inserted into the guide hole, the slide shaft portion is vertically moved while the contact is brought into contact with the hole wall surface.

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