JP5161668B2 - Filling material filling method and plug member - Google Patents

Description

  The present invention relates to a filling method of a filler into a hole formed in an existing concrete structure, and a plug member used in this filling method.

  As a seismic reinforcement method for existing concrete structures, shear reinforcement bars may be constructed by post-construction. In the construction of such a shear reinforcing bar, a reinforcing member insertion hole is drilled in a concrete structure, a shear reinforcing bar is disposed in the reinforcing member insertion hole and a filler is filled in the reinforcing member insertion hole. To do.

  In such a seismic reinforcement method, the filler filled in the reinforcing member insertion hole flows out from the hole of the reinforcing member insertion hole after filling, so that there is a gap between the filler and the hole wall of the reinforcing member insertion hole. There may be gaps. If there is a gap between the hole wall and the filler, this gap becomes a waterway, and there is a problem that groundwater or the like permeates into the structure.

Therefore, conventionally, as shown in Patent Document 1 and Patent Document 2, for example, the filling member is prevented from sagging by closing the hole of the reinforcing member insertion hole with a presser plate or a lid.
JP 2004-293294 A (paragraph number [0042], FIG. 6) JP 2003-113673 A (paragraph number [0015], FIG. 3)

However, the conventional construction method can prevent the filler from flowing out from the reinforcing member insertion hole, but cannot obtain the effect of packing the filler into the hole under pressure, so that the filler May be filled in the hole in a loose state.
As described above, when the filler is filled in a loose state, there is a possibility that a gap is generated between the filler and the hole wall.

  Such a problem has arisen not only in the shear reinforcement of the existing structure but also in the filling of the hole of any existing concrete structure, for example, the processing after the drilling of the core boring.

  The present invention has been made in order to solve the above-described problems, and it is possible to provide a high-quality filler that can be filled in a hole formed in an existing concrete structure. It is an object to provide a filling method and a plug member.

In order to solve the above-mentioned problem, the invention according to claim 1 includes a step of filling a drill hole formed in an existing concrete structure with a filler, and a plug member into the drill hole filled with the filler. The plug member is formed with a through-hole , the diameter of the distal end is smaller than the inner diameter of the hole, and the diameter of the proximal end is smaller than the inner diameter of the hole. It is formed of a large truncated cone-shaped member, and in the step of pushing in the plug member, the hole of the hole is closed by pushing the plug member until the filler flows out from the through hole. It is said.

According to a second aspect of the present invention, there is provided a step of filling a drilling hole formed in an existing concrete structure with a filler and inserting a shear reinforcement member, and a plug into the drilling hole filled with the filler. And a step of pushing the member, wherein the plug member is formed with a through-hole , the diameter of the distal end is smaller than the inner diameter of the hole, and the diameter of the proximal end is It consists of a truncated cone-shaped member formed larger than the inner diameter of the hole, and in the step of pushing the plug member, the shear reinforcement member is pushed by pushing the plug member until the filler flows out from the through hole. It is characterized in that it is suppressed and the hole of the drilled hole is sealed.

  According to such a filling material filling method, the plug member is pushed into the hole hole filled with the filler, thereby shielding the hole and preventing the filler from sagging, and the pressure is applied to the filler. Thus, the filler can be packed into the hole. Therefore, it becomes possible to perform filling of the filler into the drill hole with high quality.

  According to such a filling material filling method, the filling material into the hole can be filled with higher quality.

The invention according to claim 3 is a plug member that is pushed into a drilling hole filled with a filler, the diameter of the distal end portion being smaller than the inner diameter of the drilling hole, and the diameter of the proximal end portion being the cutting hole. A frustoconical plug body formed larger than the inner diameter of the hole, a through-hole penetrating in the proximal direction from the distal end of the plug body, a grout stopper inserted into the through-hole to shield the through-hole, It is characterized by having.

  According to such a plug member, the hole is filled with the filler so that the hole is shielded to prevent the filler from sagging, and the filler is pressurized and pushed into the hole. It becomes possible to perform filling of the filler with high quality. Moreover, since the outflow of the unnecessary filler from the through hole can be confirmed, the filler can be filled with higher quality.

According to a fourth aspect of the present invention, there is provided a plug member that is pushed into a drilling hole filled with a filler, the tip portion having a diameter smaller than the inner diameter of the drilling hole, and the proximal end portion having a diameter that is the cutting member. A truncated cone-shaped stopper body formed larger than the inner diameter of the hole, a stopper hole formed in the stopper body and opening to the proximal end side, and a proximal end portion of the stopper body inserted into the stopper hole It is characterized by comprising a stopper member for expanding the diameter of the side, a through hole penetrating in the proximal direction from the distal end of the stopper main body, and a grout stopper inserted into the through hole to shield the through hole.

  According to such a plug member, the hole is filled with the filler so that the hole is shielded to prevent the filler from sagging, and the filler is pressurized and pushed into the hole. It becomes possible to perform filling of the filler with high quality. In addition, since the diameter of the base end side of the plug body can be increased by the stopper member, it can be firmly fixed to the drilled hole, and the outflow of unnecessary filler from the through hole can be confirmed. It becomes possible to fill the filler with higher quality.

  In addition, if the unevenness adjustment material is installed in the peripheral surface of the plug main body of the said plug member, even if there is unevenness in a hole wall, the adhesion degree of a plug member and a drilling hole can be raised.

  Further, if a protruding member is formed on the distal end surface of the plug body, the shear reinforcing member can be pressed when the shear reinforcing member is inserted into the hole.

  According to the filler filling method and the plug member of the present invention, it is possible to perform high-quality filling of the filler into the drilled holes formed in the existing concrete structure.

  A preferred embodiment of the reinforcing method of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

  In the present embodiment, as shown in FIG. 1, in the case of constructing a reinforcing structure A constituted by disposing a shear reinforcing member 4 by post-construction on an existing concrete member 1, filling of the filler according to the present invention is performed. The method and the case of using the plug member 5 will be described.

  The reinforcing structure A includes an existing concrete member 1, a bottomed hole 2 formed in the existing concrete member 1, a filler 3 filled in the hole 2, and a shear reinforcement inserted into the hole 2. It is comprised by the member 4 and the plug member 5 which shields the hole hole 2.

  Although the existing concrete member 1 which concerns on this embodiment is a wall member which consists of reinforced concrete, the structure of the existing concrete member 1 is not limited.

  The hole 2 is formed by drilling from the surface (one surface) 1a of the existing concrete member 1 toward the back surface (other surface) 1b. In this embodiment, the impact hole 2 is impacted in a direction substantially perpendicular to the surface 1a. It is formed by a drilling means such as a drill, a rotary hammer drill or a core drill. The drilled hole 2 is formed on the back surface 1b side while ensuring a covering concrete thickness of a predetermined dimension. Further, the hole-drilling hole 2 includes a general part 21 having a hole diameter with a slight allowance for the diameter (width dimension) of the front-end fixing member 42 formed at the front-end part of the shear reinforcement member 4, and the surface 1 a of the existing concrete member 1. And an enlarged diameter portion 22 having a hole diameter with a slight allowance for the diameter (width dimension) of the proximal fixing member 43 attached to the proximal end portion (terminal portion) of the shear reinforcement member 4. Is formed. In addition, the shape dimension, arrangement | positioning, etc. of the drilling hole 2 are not limited, It is possible to set suitably.

  The filler 3 is made of a material such as grout or mortar, and fills the hole 2 and hardens to exhibit a predetermined strength. In addition, the material used as the filler 3 is not limited, For example, it can select and use from well-known materials suitably, such as fiber reinforced concrete.

  The shear reinforcing member 4 includes a shear reinforcing bar 41, a distal fixing member 42 and a proximal fixing member 43 having a larger cross-sectional shape than the shear reinforcing reinforcing bar 41 provided at the distal end and the proximal end of the shear reinforcing reinforcing bar 41, It is composed of In the present embodiment, the case where the shear reinforcement bar 41 is used for the shaft portion as the shear reinforcement member 4 will be described. However, the material constituting the shear reinforcement member 4 is not limited. Various known materials such as various steel bars, screw rebars, deformed rebars, PC steel wires and the like can be used as appropriate.

The shear reinforcement member 4 is inserted into the hole 2 so that the front-end fixing member 42 is positioned on the back surface 1b side. When the shear reinforcing member 4 is inserted into the hole 2, the base end fixing member 43 is disposed in the widened portion 22.
In the present embodiment, in the state where the shear reinforcement member 4 is inserted into the hole 2, each of the front end fixing member 42 and the base end fixing member 43 has a concrete covering thickness equivalent to the reinforcing bar of the existing concrete member 1. ing.

  In the present embodiment, the steel plate is fixed to the distal end of the shear reinforcing bar 41 as the distal fixing member 42 and the proximal fixing member 43, but the configurations of the distal fixing member 42 and the proximal fixing member 43 are limited. It is not something. Further, the shapes of the front end fixing member 42 and the base end fixing member 43 are not limited, and can be set as appropriate, for example, a circle, an ellipse, an oval shape, a square, a rectangle, and other polygons. . The material constituting the front end fixing member 42 and the base end fixing member 43 and the fixing method to the shear reinforcing bar 41 are not limited and can be set as appropriate.

  Here, the combination of the front end fixing member 42 and the base end fixing member 43 at both ends can be freely selected in accordance with factors such as the reinforcement arrangement of the existing concrete member 1 to be reinforced, concrete strength, and wall thickness. it can.

  The plug member 5 is a rubber member, and as shown in FIGS. 1 and 2, the diameter of the distal end portion is smaller than the inner diameter of the enlarged diameter portion 22 of the drill hole 2 and the diameter of the proximal end portion is enlarged. A plug body 51 having a truncated cone shape formed larger than the inner diameter of the portion 22, a stopper hole 52 formed in the plug body 51 and opening to the base end side, and inserted into the stopper hole 52, A stopper member 53 for expanding the diameter of the proximal end side, a through hole 54 penetrating from the distal end of the plug body 51 in the proximal direction, and a grout stopper 55 inserted into the through hole 54 and shielding the through hole 54 are provided. Configured.

  Further, as shown in FIG. 3A, a projection member 56 for pressing the shear reinforcement member 4 is formed on the distal end surface of the plug body 51. Furthermore, an unevenness adjusting material (not shown) may be provided on the peripheral surface of the plug body 51.

The stopper member 53 has a truncated cone shape in which the diameter on the distal end side (the back surface 1b side of the existing concrete member 1) is smaller than the inner diameter of the stopper hole 52 and the diameter on the proximal end side is larger than the inner diameter of the stopper hole 52. Is formed. By pushing the stopper member 53 into the stopper hole 52, the diameter of the proximal end side of the plug body 51 is increased, and the degree of fixation of the plug member 5 to the hole 2 is increased.
The material constituting the stopper member 53 may be appropriately selected from known materials such as a resin material such as wood or plastic.

  As shown in FIGS. 2 and 3, the upper portion of the distal end portion of the plug body 51 (through hole 54) is cut obliquely. When this plug member 5 is inserted into the hole 2, upward pressure is applied to the filler 3 by the oblique surface formed in the plug body 51, so that the filler 3 is sufficiently filled also above the hole 2. Is done.

The grout stopper 55 is formed such that the diameter on the distal end side (the back surface 1b side of the existing concrete member 1) is smaller than the inner diameter of the through hole 54 and the diameter on the proximal end side is larger than or equal to the inner diameter of the through hole 54. It is formed in a truncated cone shape. By inserting the grout stopper 55 into the through hole 54, the through hole 54 is shielded.
The material constituting the grout stopper 55 may be appropriately selected from known materials such as a resin material such as wood or plastic.

  The reinforcing structure A includes a drilling step of drilling a hole 2 in an existing concrete member 1, filling a bottomed hole 2 formed in the existing concrete structure 1 with a filler 3 and a shear reinforcing member 4. It is constructed by a construction method comprising a filling step for inserting the plug member, a pushing step for pushing the plug member 5 into the hole 2 filled with the filler 3, and a curing step for curing the filler 2.

(1) Drilling step In the drilling step, as shown in FIG. 4A, the shear reinforcement member 4 is installed from the surface (one surface side) 1a of the existing concrete member 1 toward the back surface (other surface side) 1b. This is a step of forming the hole 2 for the purpose.

  The drilling hole 2 is first drilled in the diameter (width) of the tip fixing member 42 formed at the tip of the shear reinforcement member 4 from the surface (one surface) 1a of the existing concrete member 1 toward the back surface (other surface) 1b. The general portion 21 having a hole diameter with a slight allowance for (dimension) is drilled. The general portion 21 is perforated in a direction substantially perpendicular to the surface 1a of the existing concrete member 1 to a depth at which a predetermined concrete covering can be secured on the back surface 1b side through the perforating means.

Next, the diameter of the drilling hole on the base end side (surface 1a side) of the drilling hole 2 is widened by using a punching means to form the widened portion 22.
When the drilling of the widened portion 22 of the drilling hole 2 is completed, the concrete powder generated for drilling in the drilling hole 2 is removed.

(2) Filling step The filling step is a step of filling the filling material 3 and inserting the shear reinforcement member 4 into the hole 2 formed in the drilling step, as shown in FIG.
In this embodiment, after filling the hole 3 with the filler 3, the shear reinforcement member 4 is inserted into the hole 2. However, this order is not limited, and the shear reinforcement member 4 is cut. The filler 3 may be filled after being inserted into the hole 2. At this time, the base end fixing member 43 of the shear reinforcing member 4 may be locked to the widened portion 22.

(3) Pushing process The pushing process is a process of pushing the plug member 5 into the hole 2 filled with the filler 3 and the shear reinforcement member 4 as shown in FIG.
By pushing the plug member 5, the filler 3 is pushed into the hole 2 with a predetermined pressure applied, and the shear reinforcement member 4 is pressed by the protruding member 56 formed at the tip of the plug member 5.

  By pushing the plug member 5, the filler 3 is discharged through the through hole 54. The plug member 5 is preferably pushed into the hole-drilling hole 2 so that the through-hole 54 is positioned above. By doing so, it can be confirmed that the filler 3 has been filled up to the upper part of the hole 2 by confirming that the filler 3 is discharged from the through hole 54.

When the plug member 5 is pushed to a predetermined depth, a grout stopper 55 is inserted into the through hole 54 to shield the through hole 54 as shown in FIG.
Further, by pushing the stopper member 53 into the stopper hole 52, the diameter of the proximal end side of the plug member 5 is increased, and the plug member 5 is fixed to the hole of the drilling hole 2.

  Since the plug member 5 is firmly fixed to the hole of the hole 2 by the stopper member 53, the plug member 5 can be pulled out from the hole 2 even when an expandable material is used as the filler 2. Is prevented. In addition, the plug member 5 prevents the filler 3 from flowing out of the hole hole 2, and pressure is applied to the filler material 3, so that the filler material 3 is densely filled into the hole hole 2.

Moreover, since the unevenness adjustment material which is not shown in figure is installed in the surrounding surface of the plug member 5, on the surrounding surface (hole wall) of the hole opening of the drilling hole 2, the surface 1a of the existing concrete member 1, etc. Even if there is unevenness, it is possible to increase the degree of adhesion with the unevenness adjusting material.
In addition, if the material with water permeability is used as the non-land adjuster, unnecessary filler 3 can be discharged through the non-land adjuster until the non-land adjuster is clogged.

(4) Curing process The curing process is a process in which the plug member 5 is inserted into the hole 2 and the filler 3 in the hole 2 is cured until a desired strength is developed.
In the case of construction conditions in which it is difficult to leave the plug member 5 after the filler 3 is cured, the stopper member 53 is pulled out and the plug member 5 is removed from the hole 2.

  As described above, according to the filling method and the plug member of the filler according to the present embodiment, it is possible to perform the filling of the filler 3 with high quality when the reinforcing structure A is constructed, and the reinforcing structure A having superior performance. Can be built.

Further, since the plug member 5 includes the through holes 54, the filler 3 can be filled with higher quality. Moreover, it becomes possible to prevent the occurrence of water leakage by filling the filler 3 with high quality.
Further, since the pressure is applied to the filler 3 by pushing the plug member 5, the filler 3 is densely filled in the hole 2.

Moreover, since the stopper member 53 can fix the plug member 5 more reliably, even when an expandable material is used as the filler 3, the plug member 5 can be prevented from moving and dropping off. . If the filler 3 is volume-expanded in a state where the stopper member 5 is immovable, the filling property in the hole 4 can be made with higher quality.
Moreover, even if there exists unevenness in the existing concrete member 1 by installing the unevenness adjustment material in the outer peripheral surface of the plug member 5, a desired adhesion degree can be ensured.

  The existing concrete member 1 can efficiently realize increase in shear strength and toughness performance by directly embedding the shear reinforcement member 4 without increasing the concrete thickness by the reinforcing structure A. In addition, since the main reinforcement is not increased, the out-of-plane shear strength can be improved without increasing the bending strength. Can be moved to a mold.

  Further, the existing concrete member 1 is improved in shear strength directly through the shear reinforcement member 4 against the oblique cracks generated when an out-of-plane shear force is applied due to the reinforcement structure A. That is, when an out-of-plane shearing force is applied, oblique cracks are likely to occur, but since a tensile force acts on the shear reinforcement member 4, a pulling force acts on the distal end fixing member 42 and the proximal end fixing member 43 at both ends. . For this reason, in the concrete (hereinafter referred to as “internal concrete”) inside the front end fixing member 42 and the base end fixing member 43, a supporting pressure acts on the internal concrete as a reaction force, and a compressive stress field is formed. Is done. That is, the inner concrete is subjected to lateral restraint, resulting in an increase in resistance to oblique tension. For this reason, the shear reinforcement member 4 having the distal end fixing member 42 and the proximal end fixing member 43 at the ends increases the out-of-plane shear strength of the existing concrete member 1 and generates compressive stress in the internal concrete ( Increased toughness performance due to the formation of a compressive stress field.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and it goes without saying that the above-described constituent elements can be appropriately changed in design without departing from the spirit of the present invention.
In particular, the concrete structure (concrete member 1) which is an object of the present invention is not limited, and can be applied to any concrete structure.

  In addition, the existing concrete member 1 to be reinforced may be a concrete structure, and may be any type such as a reinforced concrete member, an unreinforced concrete member, a cast-in-place reinforced concrete structure, a precast concrete structure, or the like. For example, the present invention is also applicable to ceiling slabs and bottom plates.

In the embodiment, as the plug member 5, a stopper body 52 and a through hole 54 are formed in the plug body 51, and a stopper member 53 and a grout stopper 55 are inserted into the stopper hole 52 and the through hole 54, respectively. However, the configuration of the plug member 5 is not limited to that described above, and can be set as appropriate.
For example, as shown in FIG. 5A, the stopper hole 52 is omitted, only the through hole 54 is formed in the plug body 51, and the plug member 5a in which the grout stopper 55 is inserted into the through hole 54 is used. May be. According to the plug member 5a, the filling of the filler 3 can be confirmed through the through hole 54, and the diameter of the proximal end portion of the plug body 51 can be increased by inserting the grout stopper 55 into the through hole 54. The function similar to that of the stopper member can be expected.

  In the above embodiment, the projection member 56 is formed at the tip of the plug member 5 and the shear reinforcement member 4 is pressed by the projection member 56. However, as shown in FIG. It is good also as a structure which presses the shear reinforcement member 4 directly on a surface.

The distal end fixing member 42 and the proximal end fixing member 43 of the shear reinforcement member 4 may be formed as necessary and may be omitted.
Further, the shear reinforcement member 4 may be disposed as necessary and may be omitted (see FIG. 6).

Further, the widened portion 22 of the hole-drilling hole 2 may be formed as necessary and can be omitted (see FIG. 6).
Moreover, the plug member 5 may be inserted into the hole-drilling hole 2 without protruding from the existing concrete member 1 (see FIG. 6).

  Further, the insertion interval and the number of insertions of the shear reinforcement member 4 are not limited to the above embodiment, and can be determined as appropriate.

  Further, in the above-described embodiment, the shear reinforcement method for the reinforced concrete structure has been described. For example, the filling method of the filler according to the present invention is used in the restoration work of the concrete structure in which the drilling holes such as core boring are formed. May be. Thereby, the joint surface of a drilling hole and a filler does not become a water channel, and the concrete structure excellent in water stop is provided.

  Moreover, although the said embodiment demonstrated the case where a filler was filled with a bottomed hole, the filling method and plug member concerning this invention may be employ | adopted with respect to a through-hole. . In this case, plug members may be disposed on both sides of the through hole.

It is sectional drawing which shows the reinforcement structure which concerns on suitable embodiment of this invention. It is a perspective view which shows the stopper member which concerns on suitable embodiment of this invention. It is a figure which shows the plug member shown in FIG. 2, Comprising: (a) is a front view which faces from the front-end | tip of a plug member, (b) is a rear view which faces from the base end of a plug member. (A)-(d) is sectional drawing which shows each operation | movement procedure of the filling method of the filler concerning suitable embodiment of this invention. (A)-(d) is sectional drawing which shows the modification of the stopper member shown in FIG. It is sectional drawing which shows the modification of the reinforcement structure shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing concrete member 2 Drilling hole 3 Filler 4 Shear reinforcement member 5 Plug member 51 Plug body 52 Stopper hole 53 Stopper member 54 Through-hole 55 Grout stopper 56 Protrusion member A Reinforcement structure

Claims (6)

Filling a hole in a drilled hole formed in an existing concrete structure,
A step of pushing a plug member into a hole hole filled with the filler, and a filling method of the filler comprising:
The plug member is smaller than the diameter of the above end portion together when penetrations holes are formed inside diameter of the drilling hole, a truncated cone the diameter of the base end portion is formed larger than the inner diameter of the drilling hole It consists of a shaped member ,
In the step of pushing the plug member, the filling material is characterized in that sealing the hole opening of said drilling hole by pushing the plug member to flow out from the through hole, filling method of filling material. A step of filling a drilling hole formed in an existing concrete structure with a filler and inserting a shear reinforcement member;
A step of pushing a plug member into a hole hole filled with the filler, and a filling method of the filler comprising:
The plug member is smaller than the diameter of the above end portion together when penetrations holes are formed inside diameter of the drilling hole, a truncated cone the diameter of the base end portion is formed larger than the inner diameter of the drilling hole It consists of a shaped member ,
In the step of pushing the plug member, wherein the filler to seal the hole opening of drilled holes while suppressing the by Ri before Symbol shear reinforcement member to be pushed the plug member to flow out from the through hole, Filling method of the filler. A plug member that is pushed into a drilling hole filled with a filler,
A frustum-shaped plug body formed such that the diameter of the distal end portion is smaller than the inner diameter of the hole, and the diameter of the proximal end is larger than the inner diameter of the hole.
A through-hole penetrating in the proximal direction from the distal end of the plug body,
And a grout stopper that is inserted into the through hole and shields the through hole. A plug member that is pushed into a drilling hole filled with a filler,
A frustum-shaped plug body formed such that the diameter of the distal end portion is smaller than the inner diameter of the hole, and the diameter of the proximal end is larger than the inner diameter of the hole.
A stopper hole formed in the plug body and opening to the base end side,
A stopper member that is inserted into the stopper hole and expands the proximal end side of the plug body; and
A through-hole penetrating in the proximal direction from the distal end of the plug body,
And a grout stopper that is inserted into the through hole and shields the through hole. The plug member according to claim 3 or 4 , wherein an unevenness adjusting material is installed on a peripheral surface of the plug body. The plug member according to any one of claims 3 to 5 , wherein a protruding member is formed on a distal end surface of the plug body.

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