JP2011052398A - Penetration-type anchor and construction method for fixing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology of enabling an anchor to be easily fixed to a concrete structure by operations from the one side of the concrete structure, and of enabling the anchor to easily secure high pull-out strength against the concrete structure. <P>SOLUTION: In this penetration-type anchor 10, a leading end of an anchor bolt 11 is equipped with an expansion structure 12 which can pass in a contracted state through a through-hole 1a formed in the concrete structure 1 and which can be expanded to the periphery of the leading end of the anchor bolt 11 from the contracted state. The penetration-type anchor 10 and a construction method for fixing the penetration-type anchor 10 are provided. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an anchor fixed to a concrete structure provided with soil on one side or soil, such as a footing, a culvert, an underground connecting wall, etc., and particularly by work from one side of the concrete structure. The present invention relates to a through-type anchor that can be fixed to a concrete structure and a method for fixing the same.

As is well known, post-installed anchors such as metal expansion anchors and adhesive anchors require an embedding depth (hereinafter also referred to as anchorage length) for concrete structures in order to ensure sufficient anchoring power for concrete structures. It is known that.
By the way, post-construction anchors such as metal expansion anchors and adhesive anchors as described above are applied to soil structures such as footings, culverts, underground walls, etc., or concrete structures with soil on one side (hereinafter also referred to simply as structures). In this case, if the thickness of the structure is thin or if the strength is insufficient due to aging, etc., there are cases where the desired fixing force cannot be secured and construction is impossible.

As a countermeasure when the thickness of the structure is thin, for example, as in Patent Document 1, a hole having a widened portion at the bottom is drilled in the structure itself so that the widened portion reaches this hole. A post-construction anchor method has been proposed in which an anchor is inserted into the hole and a hole is filled with a filler such as mortar to fix the anchor. In this method, in particular, the anchor is integrally fixed to the filler filled in the widened portion so that the anchor pull-out strength can be improved, so that the anchor embedding depth can be reduced. However, since this method forms a drilling hole that includes a widened portion in the structure itself, the load applied to the structure is particularly large for the formation of the widened portion. If there is a portion where the concrete covering thickness is locally reduced, eventually, there is a limit in improving the pull-out strength, and there is a problem in maintaining the strength of the structure. For this reason, the size of the widened portion remains small, and the applicable cases are very limited, for example, the use of the anchor is limited to supporting a relatively small load.
In addition, a structure whose strength is reduced due to aging or the like has a problem that it is difficult to form a drilling hole, for example, there is a possibility that a drilling hole including a widened portion may be broken.

  Further, as described in paragraph (0022) of Patent Document 2 and FIG. 1 and the like, an anchor bolt is passed through a through hole penetrating the concrete foundation, and a connecting plate is attached to the tip of the anchor bolt protruding below the concrete foundation. Insert and hold the connecting plate with the nut fastened to the tip of the anchor bolt, and further provide the anchor bolt lower end, the connecting plate, and the grout that covers the nut and joins the concrete foundation. A technology for fixing to concrete foundations is also proposed. With the technique described in Patent Document 2, it is only necessary to form a simple through hole in the structure (concrete foundation), and a nut that is screwed to an anchor bolt that is passed through the through hole is attached to the connection plate. Therefore, the entire portion of the structure through which the anchor bolt penetrates can function to ensure the pullout strength of the anchor bolt. It can also be applied to anchors that bear large loads, and can be widely applied to structures that are relatively thin or have reduced strength.

JP 2008-208597 A JP 2005-299129 A

  However, the technique of the above-mentioned patent document 2 performs operations such as insertion (extrapolation) of the connecting plate into the tip (lower end) of the anchor bolt projecting to the lower side of the concrete foundation, screwing of the nut, and embedding by the grout. In order to be able to do this, it is necessary to remove the embankment around the concrete foundation and the cracked land under the concrete foundation. In addition, there is a problem that after the embedding of nuts and the like by grout is completed, it is necessary to recover the split chestnut industry and embankment, which requires large-scale construction.

  In view of the above problems, the present invention provides a through-type anchor that can be easily fixed to a concrete structure by work from one side of the concrete structure, and that can easily ensure high pulling strength for the concrete structure, and fixing the same. The purpose is to provide construction methods.

In order to solve the above problems, the present invention provides the following configuration.
The first invention is an anchor fixed in a penetrating state by a post-construction to a concrete structure provided with soil in the soil or on one side, and has soil on one side and on the side opposite to the soil side An anchor bolt that is passed from the exposed surface side of the concrete structure to a through-hole formed in the concrete structure in which the exposed surface is secured, and the anchor bolt is provided at the tip of the anchor bolt and is in a reduced state in the reduced state. An expandable structure that can pass through a through-hole and can be expanded around the tip of the anchor bolt from a contracted state, and is brought into contact with the concrete structure from the exposed surface side while being externally attached to the anchor bolt By screwing and tightening the contact member and the anchor bolt on the opposite side of the concrete structure via the contact member of the anchor bolt, the soil structure side of the concrete structure A fastening force for sandwiching the concrete structure between the abutting member and an engaging structure that is configured by expanding the expanded structure in the formed expansion space and is engaged with the concrete structure. The expansion structure can pass through the through-hole when reduced, and can be engaged with the concrete structure around the through-hole when expanded on the soil side of the concrete structure. A penetrating anchor is provided that is configured as follows.
According to a second aspect of the present invention, there is provided a rotating member in which the expandable structure is formed by pivotally attaching a plurality of rotating members to a bracket attached to the tip of the anchor bolt with a rotation axis perpendicular to the center axis of the anchor bolt. The engagement unit with a rotating member is a distal end opposite to a base end portion pivotally attached to the bracket from a state in which the plurality of rotating members extend from the bracket along the anchor bolt. The engagement structure is configured by rotating the parts so as to be separated from each other and supporting each of the front end parts overhanging the bracket, and the penetration structure is formed in the state of the engagement structure. A penetrating anchor according to the first aspect of the present invention is provided, which is engaged from the soil side with the concrete structure around a hole.
According to a third aspect of the present invention, the engaging unit with a rotating member is configured to elastically bias the rotating member to rotate in a direction inclined with respect to the anchor bolt from a state extending along the anchor bolt. A penetrating anchor according to the second aspect of the present invention is provided, characterized in that the penetrating means is provided.
4th invention is the cylindrical body arrange | positioned between the said retaining member attached to the anchor bolt front-end | tip, and the said expansion | extension type structure is attached to the said anchor bolt, and the said contact member, The cylindrical body is divided into a plurality of slits extending along the central axis of the cylindrical body at a central portion in the central axial direction, and the anchor bolt is pulled out in a direction that is relatively with respect to the contact member. An expansion portion that is expanded and deformed by a compressive load applied between the retaining member and the abutting member and can be engaged with the concrete structure from the soil side. A penetrating anchor according to the first aspect of the invention is provided.
According to the fifth aspect of the present invention, there is further provided a flexible portion that accommodates the portion that is brought into contact with and engaged with the concrete structure from the soil side by the expansion of the expansion portion of the cylindrical body and the entire portion on the anchor tip side from the portion. A flexible bag is provided with an opening edge around the opening attached to the extension of the cylindrical body, and the bag is fed with a filler material passed through the through hole of the concrete structure. A curable filler is filled from the exposed surface side of the concrete structure after the expansion portion of the cylindrical body is expanded via a supply hose. According to a fourth aspect of the present invention, there is provided a penetrating anchor according to the fourth aspect, wherein an abutment block portion used as a composite structure is formed.
According to a sixth aspect of the present invention, the expandable structure is a flexible bag attached to the tip of the anchor bolt, and the bag is opposite to the bottom from the bottom fixed to the tip of the anchor bolt. An opening edge around the opening of the bag is disposed so as to surround the anchor bolt, and the opening edge is made deformable by an elastically deformable core member provided along the opening edge. The body is deformed from the exposed surface side of the concrete structure together with the anchor bolt tip and passed through the through hole, and then disposed in the expansion space, and the opening is elastic of the core material. In the expanded state, the curable filler is filled from the exposed surface side of the concrete structure through the filler feeding hose passed through the through hole of the concrete structure. It is, to provide a through anchor of the first invention, characterized in that abutment block portion used as the engagement structure by the curing of the filling material is formed.
In a seventh aspect of the present invention, the unbonded cylindrical body is disposed in the bag body so as to be fitted around the anchor bolt so as to surround the anchor bolt and prevent the anchor bolt from being embedded by the filler filled in the bag body. A penetrating anchor according to the sixth aspect of the present invention is provided.
According to an eighth aspect of the invention of the sixth or seventh aspect, wherein the bag body is formed in a tapered shape that expands toward the opening edge side from the bottom fixed to the tip of the anchor bolt. A penetrating anchor is provided.
A ninth invention provides a penetrating anchor according to any one of the sixth to eighth inventions, wherein a reinforcing bar embedded in the filler is provided in the bag.
The tenth invention is a fixing construction method for fixing the penetration anchor of any one of the first to ninth inventions to a concrete structure provided in the soil or in a state where there is soil on one side, and the soil is on one side. The anchor bolt is passed from the exposed surface side of the concrete structure through a through hole formed in the concrete structure in which the exposed surface is secured on the side opposite to the soil side. The expanded structure is expanded in an expansion space formed on the soil side of the concrete structure to form the engagement structure, and the contact member is extrapolated to the anchor bolt To the concrete structure from the exposed surface side, and tightening the nut screwed to the opposite side of the concrete structure via the contact member of the anchor bolt, The anchor bolt is fixed to the concrete structure by fastening the concrete structure between the expansion structure engaged with a cleat structure and the abutting member so as to sandwich the concrete structure. A method for fixing and fixing a type anchor is provided.

  The penetration type anchor according to the present invention is provided with an expandable structure at the tip end of the anchor bolt, which is capable of passing through a through hole of a concrete structure in a reduced state and is expandable from the reduced state around the tip end of the anchor bolt. The expanded structure that has passed through the through hole together with the anchor bolt tip from the exposed surface side of the concrete structure is expanded in the expansion space on the concrete structure soil side, whereby the concrete structure An engagement structure that can be brought into contact with the portion located around the through hole from the soil side and engaged can be easily obtained. For this reason, according to the present invention, the anchor bolt is made into a concrete structure only by work from one side (exposed surface side) of the concrete structure without performing a large-scale construction like the technique described in Patent Document 2 described above. It is possible to obtain an excellent effect that it can be easily fixed to an object and a high pulling strength for a concrete structure can be easily secured.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the penetration anchor of 1st Embodiment of this invention, and its fixing construction method, (a) is a top view which shows the engagement unit with a rotation member of a penetration anchor, (b) is a penetration anchor It is sectional drawing which shows the state which inserted the front-end | tip part into the through-hole of a concrete structure. It is a figure explaining the state which each rotation member of the engagement unit with a rotation member of the penetration type anchor of Drawing 1 was stored in the rotation member storage slot of a bracket, and (a) is a plane showing an engagement unit with a rotation member. FIG. 4B is a cross-sectional view illustrating a state in which the engaging unit with the rotating member is disposed in the expansion space below the concrete structure. It is a figure explaining the example which provided the spring for elastically urging a rotation member to the rotation member accommodation groove | channel direction in the engagement unit with a rotation member of the penetration type anchor of FIG. (A)-(c) is a figure explaining the penetration type anchor of the 2nd embodiment of the present invention, and its fixed construction method. (A), (b) is a figure explaining the penetration type anchor of the 3rd embodiment of the present invention, and its fixed construction method. (A)-(c) is a figure explaining the penetration type anchor of the 4th embodiment of the present invention, and its fixed construction method. It is a figure which shows the structure of the opening edge part vicinity of the bag body of the penetration anchor of FIG. 6, Comprising: (a) is a cross-sectional perspective view, (b) is a top view. It is a perspective view explaining another aspect of a bag. (A), (b) is a figure explaining an example of the penetration-type anchor comprised using the taper-shaped bag body, and its fixing construction method. (A), (b) is a figure explaining the process after arrange | positioning a bag body in the space for expansion about the penetration type anchor of FIG. 9, and its fixing construction method. (A)-(c) is a figure explaining the penetration type anchor of the 5th embodiment of the present invention, and its fixed construction method. (A), (b) is a modification of 5th Embodiment of this invention, and is a figure explaining an example of the penetration type anchor comprised using the taper-shaped bag body, and its fixing construction method. (A), (b) is a figure explaining the process after arrange | positioning a bag body in the space for expansion about the penetration type anchor of FIG. 12, and its fixing construction method. It is sectional drawing explaining the example which applied the penetration type anchor and its fixing construction method concerning the present invention to footing. It is sectional drawing explaining the example which applied the penetration type anchor which concerns on this invention, and its fixing construction method to the underground connection wall.

  Hereinafter, a penetration type anchor and a fixing construction method of one embodiment of the present invention are explained with reference to drawings.

(First embodiment)
First, a first embodiment of the present invention will be described with reference to FIGS.
In FIGS. 1B and 2B, the upper side is described as the upper side, and the lower side is described as the lower side.
In the figure, reference numeral 1 is a concrete structure, and 2 is the ground (soil). The concrete structure 1 is formed on the ground 2 so as to extend laterally along the upper surface of the ground 2.

  As shown in FIGS. 1 (a), 1 (b), 2 (a) and 2 (b), the penetration anchor 10 described here penetrates the concrete structure 1 (hereinafter simply referred to as a structure) vertically. An anchor bolt 11 passed through the provided through hole 1a, an engaging unit 12 with a rotating member (expanded structure, which will be described later) provided at the tip of the anchor bolt 11, and the anchor bolt 11 are extrapolated. In this state, a plate-like contact member 13 (see FIG. 2B) that contacts the structure 1 from the exposed surface 1b side opposite to the soil side (ground 2 side), and the anchor bolt 11 The nut 14 is screwed to the opposite side of the structure 1 through the contact member 13 and the anchor bolt 11 is externally inserted between the contact member 13 and the nut 14. The washer 15 is provided.

  The anchor bolt 11 is a long bar-shaped metal member that is much longer than the through hole 1 a of the structure 1. Of the entire length of the anchor bolt 11, at least the distal end side on which the engaging unit 12 with the rotating member is provided is a male threaded portion having a thread formed on the outer peripheral surface thereof.

  As shown in FIGS. 1 (a), 1 (b), 2 (a) and 2 (b), the engagement unit 12 with a rotating member (hereinafter also simply referred to as an engagement unit) is attached to the tip of the anchor bolt 11. The bracket 12a is attached, and a plurality of rotating members 12c pivotally attached to the bracket 12a with a rotating shaft 12b (rotating axis) perpendicular to the center axis of the anchor bolt 11 are configured. .

  The bracket 12a is formed in a substantially disc shape, and is screwed to the outside of the anchor bolt 12 by a female screw hole 12a1 penetrating the center portion thereof. The bracket 12a includes a nut 16 (hereinafter referred to as a retaining nut) screwed to the anchor bolt 11 at the tip end side of the anchor bolt 11 (lower side of FIGS. 1B and 2B) than the bracket 12a. Also with a tightening force, and the retaining nut 16 restricts the anchor bolt 11 from coming off the tip.

The rotating member 12c of the engagement unit 12 of the illustrated example is a rod-shaped elongated piece, and one end in the longitudinal direction (hereinafter referred to as a base end portion 12c1) is pivotally attached to the bracket 12a via the rotating shaft 12b. ing. In the illustrated engagement unit 12, four rotation members 12c are provided for the bracket 12a.
These rotary members 12c are respectively supported by the rotary shafts 12b provided in the four rotary member storage grooves 12a3 formed on the upper surface 12a2 of the disk-shaped bracket 12a. The rotating shaft 12b is equally arranged at four locations around the female screw hole 12a1 of the bracket 12a, and supports the base end portion 12c1 of the rotating member 12c with a rotating axis perpendicular to the central axis of the anchor bolt 11, respectively. ing. The rotating member storage grooves 12a3 are formed so as to extend along the bracket upper surface 12a2 in a direction perpendicular to the rotation axis of the rotating member 12c by the rotating shaft 12b, that is, in a tangential direction to the female screw hole 12a1 of the bracket 12a. Has been.

Each rotary member storage groove 12a3 stores a base end portion 12c1 of the rotary member 12c supported by the rotary shaft 12b at one end in the longitudinal direction (extending direction). The other end in the longitudinal direction of each rotating member storage groove 12a3 is an opening end 12a4 opened on the outer peripheral surface of the bracket 12a, and the rotating member 12c stands upright so as to protrude vertically on the bracket upper surface 12a2, for example. To the opening end 12a4, the rotating member 12c can be stored in the rotating member storing groove 12a3. Since the length of the rotation member storage groove 12a3 is shorter than the length of the rotation member 12c, when the rotation member 12c is stored in the rotation member storage groove 12a3, the tip end portion 12c2 side of the rotation member 12c protrudes outward from the outer peripheral surface of the bracket 12a. Is done. Further, when the rotary member 12c is stored in the rotary member storage groove 12a3, the rotary member 12c is supported in such a direction that the longitudinal direction thereof is along the bracket upper surface 12a2, so that the distal end portion 12c2 side of the rotary member 12c is the bracket. The state of protruding outward from the outer peripheral surface of 12a is stably maintained.
In a state where the rotating member 12c stands so as to vertically protrude on the bracket upper surface 12a2 as shown by an imaginary line in FIG. 1B, the side surface is viewed from the opening end 12a4 of the rotating member storage groove 12a3. Since it is in contact with the inner wall surface (back end surface 12a5) at the back end, rotation to the side opposite to the opening end 12a4 is restricted, and only rotation to the opening end 12a4 side is permitted.

An example of a construction method (fixed construction method) for fixing the penetrating anchor 10 (hereinafter also simply referred to as an anchor) to the structure 1 will be described.
First, as illustrated in FIG. 1B, a through hole 1 a that vertically penetrates the structure 1 is formed in the structure 1. Further, an expansion space that extends from directly below the through hole 1a to a lower portion of the structure 1 positioned around the through hole 1a so as to expand the ground hole 2 below the through hole 1a. 3 is formed.

  The expansion space 3 is formed, for example, in an excavation hole having the same diameter as the through-hole 1a in the ground 2 below the through-hole 1a, and penetrates a nozzle for injecting pressure water from the exposed surface 1b side of the structure 1 A water jet system in which the ground 2 around the excavation hole is shaved by the rotation and vertical movement of the nozzle while lowering the excavation hole through the hole 1a and continuing the injection of pressure water from the nozzle; A method of forming an expansion space 3 by rotating and vertically moving a cutting tool having a configuration in which a cutting blade capable of changing the amount of protrusion from the outer peripheral surface of the rotating shaft by hydraulic pressure or the like is provided (hereinafter referred to as a rotary tool cutting method) For example).

The through hole 1a is formed with an inner diameter slightly larger than the outer diameter of the bracket 12a so that the bracket 12a of the engagement unit 12 can pass therethrough.
In addition, the expansion space 3 has a depth and a width (inner diameter) in which each rotation member 12c of the engagement unit 12 can be stored in the rotation member storage groove 12a3 of the bracket 12a by rotation about the rotation shaft 12b. ), And each rotating member 12c is stored in the rotating member storage groove 12a3 so that the tip end 12c2 side can protrude outward from the outer peripheral surface of the bracket 12a.

Next, from the exposed surface 1b side of the structure 1, the anchor 10 is inserted into the through hole 1a from the tip end portion where the engagement unit 12 is provided, and the engagement unit is passed through the through hole 1a. 12 is arranged in the expansion space 3.
Each rotating member 12c of the engagement unit 12 is vertically or completely attached to the anchor bolt 11 on the bracket upper surface 12a2 by shaking of the anchor 10 or the like until the bracket 12a of the engagement unit 12 reaches the expansion space 3. The rotating member storage groove 12a3 can be inclined to the opening end 12a4 side rather than the posture extending along. The rotating member 12c in a state inclined to the opening end 12a4 side of the rotating member storage groove 12a3 descends as the anchor 10 descends while the tip portion 12c2 slides on the inner surface of the through hole 1a, and the tip portion 12c2 When it moves downward from the lower end of the through hole 1a (when it enters the expansion space 3), it rotates under its own weight and is stored in the rotating member storage groove 12a3. Further, by giving rotation or vibration around the axis to the anchor bolt 11, all the rotating members 12c can be easily stored in the rotating member storage groove 12a3.

  The rotating member 12c housed in the rotating member housing groove 12a3 is brought into contact with the bottom wall portion 12a6 of the bracket 12a that forms the groove bottom of the rotating member housing groove 12a3, so that the downward rotation with respect to the bracket 12a is prevented. Be regulated.

  When the engagement unit 12 of the anchor 10 is passed through the through hole 1a, the rotating member 12c has a tip 12c2 in contact with the inner surface of the through hole 1a or at a position separated from the inner surface of the through hole 1a. The protrusion dimension from the outer peripheral surface of the bracket 12a is smaller than that when it is stored in the groove 12a3, that is, each rotation member 12c is stored in the rotation member storage groove 12a3, and the protrusion dimension from the outer peripheral surface of the bracket 12a is maximized. Compared to the expanded state, the projecting dimension from the outer peripheral surface of the bracket 12a is reduced (reduced state).

When each rotating member 12c is stored in the rotating member storage groove 12a3, the distance from the central axis of the female screw hole 12a1 of the bracket 12a to the tip of the rotating member 12c protruding from the outer peripheral surface of the bracket 12a is the inner diameter of the through hole 1a. Greater than half.
For this reason, when the anchor 10 is pulled upward (moved in the pulling direction) in this state, the rotating member 12c of the engaging unit 12 is positioned at a portion (mouth edge) of the structure 1 located around the through hole 1a. Or the bracket 12a will contact | abut and will be engaged, and the movement to the further extraction direction is controlled.
Each rotating member 12c is stored in the rotating member storage groove 12a3, so that the engagement unit 12 can be compared with a state when the rotating member 12c passes through the through hole 1a of the structure 1 (reduced state). The projecting state from the outer peripheral surface of the bracket 12a is in an expanded state. Thus, an engagement structure that can be engaged with the structure 1 from the soil side is configured.

When the engagement structure is configured, as shown in FIG. 2B, the contact member 13 is brought into contact with the exposed surface 1 b of the structure 1, and the nut 14 is tightened. The structure 1 is sandwiched between the contact member 13 and the engaging structure, and the anchor bolt 11 and the entire anchor 10 can be fixed to the structure 1.
The contact member 13 has a bolt insertion hole 13a which is a through hole for passing the anchor bolt 11 in the center thereof, and the anchor bolt 11 is accommodated in the anchor bolt 11 in a state where the anchor bolt 11 is accommodated in the bolt insertion hole 13a. Extrapolated.

  As described above, according to the anchor 10 and its fixing construction method, work from one side (exposed surface 1b side) of the concrete structure 1 can be performed without performing a large-scale construction such as the technique described in Patent Document 2. Only by this, the anchor bolt 11 can be easily fixed to the concrete structure 1. And since the whole thickness of the part in which the said through-hole 1a of the structure 1 was formed can be functioned to ensuring the extraction strength of the anchor 10, the high extraction strength with respect to the concrete structure 1 can be ensured easily.

In addition, as shown in FIG. 3, the structure which provided the spring 12d for elastically urging | biasing the rotation member 12c in the accommodation direction to the rotation member accommodation groove | channel 12a3 of the bracket 12a can also be employ | adopted suitably as said engagement unit. . Although the torsion coil spring (torsion spring) is used for the spring 12d in the illustrated example, the biasing means is not limited to this, and for example, a plate spring, a tension coil spring, a compression coil spring, or the like can be employed.
In FIG. 3, reference numeral 12 </ b> A is added to the engaging unit, and reference numeral 10 </ b> A is added to the penetrating anchor.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the figure, components common to those shown in FIGS. 1A, 1B, 2A, 2B are denoted by the same reference numerals, and description thereof is simplified or omitted.
As shown in FIGS. 4A to 4C, the anchor 20 of this embodiment includes a tubular body 21, a pressure receiving ring 22, spacers 23 a and 23 b, which will be described later, instead of the engagement unit 12 in the anchor 10 described above. Is used. Components other than the cylindrical body 21, the pressure receiving ring 22, and the spacers 23a and 23b are the same as those of the anchor 10 described above.
4A to 4C, the nut 14 and the washer 15 are not shown.

As shown in FIGS. 4A to 4C, the anchor 20 includes an anchor bolt between a retaining nut 16 (a retaining member) attached to the tip of the anchor bolt 11 and the abutting member 13. The cylindrical body 21 and the pressure receiving ring 22 that are extrapolated to 11 are inserted and arranged.
The cylindrical body 21 is a metal sleeve-shaped member such as a steel pipe, and is divided into a plurality of portions by a slit 21a extending along the central axis of the cylindrical body 21 at the center in the central axis direction. The expansion part 21b is provided. Portions located on both sides of the expanded portion 21b of the cylindrical body 21 are ring portions (end ring portions 21c and 21d) where the slit 21a is not formed.

  The pressure receiving ring 22 is interposed between an end ring portion 21 c at one end in the central axial direction of the cylindrical body 21 (hereinafter also referred to as an end ring portion 21 c on the distal end side of the cylindrical body 21) and the retaining nut 16. Has been. The pressure receiving ring 22 has an inner hole 22a having an inner diameter that is slightly larger than the outer diameter of the anchor bolt 11. One surface of the pressure receiving ring 22 can be brought into contact with almost the entire end surface of the retaining nut 16, and the opposite surface. The entire end surface of the end ring portion 21c on the distal end side of the cylindrical body 21 can be brought into contact with the outer peripheral portion of the cylindrical body 21.

An example of a fixing method for fixing the anchor 20 to the structure 1 will be described.
First, after the formation of the through hole 1b of the structure 1 and the expansion space 3 below the structure 1 as in the first embodiment described above, as shown in FIG. 1 is inserted into the through-hole 1a from the exposed surface 1b side, and the expansion portion 21b of the cylindrical portion 21 is expanded below the structure 1 3 and an abutting member 13 that has been extrapolated to the anchor bolt 11 on the exposed surface 1 b of the structure 1.

  In the present embodiment, in order to arrange the entire extended portion 21b of the cylindrical portion 21 in the expansion space 3, a ring-shaped spacer 23a having the same outer diameter as that of the cylindrical body 21, 23 b is extrapolated to the anchor bolt 11 and interposed between the cylindrical body 21 and the contact member 13. As a result, as shown in FIG. 5A, when the end surface of the upper (anchor base end side) spacer 23b is brought into contact with the contact member 13, the base end opposite to the tip end side of the cylindrical portion 21 is obtained. The boundary position between the end ring portion 21d on the side and the extended portion 21b is substantially coincident with the soil side surface of the structure 1, and the entire extended portion 21b is arranged in the expansion space 3.

  Next, as shown in FIG. 4 (b), a hydraulic jack 25 is disposed between the fixing plate 24 fixed at a position spaced apart from the structure 1 of the anchor bolt 11 and the contact member 13. As shown in FIG. 4C, the hydraulic jack 25 is driven (extended), and the anchor bolt 11 is moved in the pulling direction while maintaining the pressed state of the contact member 13 against the structure exposed surface 1b. Do (pull up). Accordingly, the expansion portion 21b of the cylindrical body 21 can be expanded and deformed by a compressive load applied between the retaining nut 16 and the pressure receiving ring 22 and the contact member 13, and the expanded portion that has been expanded and deformed. The outer peripheral portion of 21b can be brought into contact with and engaged with the structure 1 from the soil side. That is, an engagement structure that can be engaged with the structure 1 is thus configured.

  Then, the nut 14 screwed to the anchor bolt 11 is tightened (in this example, the washer 15 externally attached to the anchor bolt 11 is disposed between the nut 14 and the contact member 13), The extension 21b (engagement structure) engaged with the structure 1 from the soil side, the nut 14, the washer 15, and the contact member 13 are fastened and fixed to the structure 1. Thereby, the anchor bolt 11 and the anchor 10 whole can be fixed to the structure 1.

  As described above, the anchor bolt 11 can be easily fixed to the concrete structure 1 only by the work from one side (exposed surface 1b side) of the concrete structure 1 with respect to the anchor 20 and its fixing method. And since the whole thickness of the part in which the said through-hole 1a of the structure 1 was formed can be functioned to ensuring the extraction strength of the anchor 20, the high extraction strength with respect to the concrete structure 1 can be ensured easily.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. 5 (a) and 5 (b).
In the figure, components common to those shown in FIGS. 4A to 4C are denoted by common reference numerals, and description thereof is simplified or omitted.
As shown in FIGS. 5A and 5B, the anchor 30 of this embodiment is the tip of the anchor 20 of the second embodiment described above (the end on the side where the cylindrical body 21 is provided). In addition, a flexible bag body 27 for filling a curable filler 26 (grouting) is provided.

The bag body 27 is provided so as to cover the anchor 30 from its distal end side, and includes a portion of the expansion portion 21b that is brought into contact with and engaged with the structure 1 from the soil side by expansion. Stores the entire anchor tip side.
In the case of the anchor 30 in the illustrated example, the expanded portion 21b of the cylindrical body 21 has a configuration in which the central portion in the central axis direction is a place where the distance from the anchor bolt 11 is the maximum when expanded, Including the central portion in the central axial direction of the extended portion 21b, the entire portion on the anchor tip side is accommodated from the central portion.

The bag body 27 is provided by attaching an opening edge portion 27b around the opening portion 27a to a portion of the expansion portion 21b of the cylindrical body 21 that can be engaged with the structure 1 during expansion.
In the bag body 27, after the expansion portion 21 b of the cylindrical body 21 is expanded, the filler is fed through the through hole (not shown) formed in the contact member 13 and the through hole 1 a of the structure 1. The filler 26 is filled from the exposed surface 1 b side of the structure 1 through the hose 28 for use. And the contact | blocking block part used as an engagement structure body contact | abutted and engaged with the structure 1 is formed by hardening of this filler 26. As shown in FIG. Since this abutting block portion has a structure in which the expanded portion 21b that has been expanded is embedded in the filler and integrated, excellent strength can be secured.

5A and 5B illustrate a state in which the filling material feeding hose 28 and the air bleeding hose 29 are inserted into the bag body 27. FIG. The air bleeding hose 29 is passed through a through hole (not shown) formed in the abutting member 13 and the through hole 1a of the structure 1 in the same manner as the filler feeding hose 28, and the tip thereof is the bag body 27. Plugged into.
The filler feeding hose 28 and the air venting hose 29 are inserted into the bag body 27 in advance when the tip end of the anchor 30 is inserted into the through hole 1a of the structure 1, and a clip or the like is fastened. By fastening using a tool, it can be inserted into the expansion space 3 together with the bag 27. FIG. 5A shows a case where the hoses 28 and 29 are inserted together with the bag body 27 into the expansion space 3.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 6 (a) to 6 (c) and FIG.
In the figure, components common to those shown in FIGS. 5A and 5B are denoted by common reference numerals, and the description thereof is simplified or omitted.
As shown in FIGS. 6A to 6C, the anchor 40 (penetrating anchor) of this embodiment is replaced with the engagement unit 12 at the tip of the anchor bolt 11 in the anchor 10 of the first embodiment described above. A flexible bag 41 (expanded structure) for filling the curable filler 26 (grout) is provided.

The bag body 41 is made of, for example, a synthetic resin such as vinyl chloride or polyethylene, and has a bottomed cylindrical shape (a cylindrical shape having a bottom portion only at one end in the central axis direction, hereinafter the same).
The bag body 41 is provided in an extrapolated state with respect to the anchor bolt 11 so that the anchor bolt 11 passes through the center of the bottom 41a, and the peripheral portion of the opening through which the anchor bolt 11 passes is anchor bolt 11. And a bag bottom receiving ring 42 disposed in contact with an end surface of the nut 16 on the anchor base end side (upper side in FIGS. 6A to 6C), and the nut via the bag bottom receiving ring 42 The anchor bolt 11 is attached to the anchor bolt 11 by being sandwiched between the fixing nut 43 screwed to the anchor bolt 11 on the opposite side to 16. The bag body 41 is attached to the anchor bolt 11 in such a direction that the opening 41c is closer to the anchor proximal side than the bottom 41a. The fixing nut 43 is located inside the bag body 41.

An outer peripheral wall 41 b of the bag body 41 is provided so as to surround the anchor bolt 11. As shown in FIGS. 7 (a) and 7 (b), the opening edge 41d around the opening 41c opposite to the bottom 41a of the bag body 41 has a linear shape that can be elastically deformed over its entire circumference. A core member 41e is attached, whereby the opening edge portion 41d is freely deformable.
For example, a metal wire can be suitably used as the linear core member 41e. The opening edge portion 41d of the bag body 41 is provided with a core material storage cylinder portion 41f formed in a cylindrical shape by joining the synthetic resin sheets, and the core material 41e is provided with the core material storage cylinder portion. 41f is loosely inserted. The core material 41e is stored in the core material storage cylinder portion 41f in a state where both ends in the longitudinal direction are wrapped with each other. Thereby, even if the opening edge portion 41d of the bag body 41 is largely deformed, the elasticity of the core member 41e always works effectively over the entire circumference.

An example of a fixing method for fixing the anchor 40 to the structure 1 will be described.
First, after forming the through-hole 1b of the structure 1 and the expansion space 3 below the structure 1 as in the first embodiment described above, the anchor 40 is formed as shown in FIG. The front end portion where the bag body 41 is provided is inserted into the through hole 1a from the exposed surface 1b side of the structure 1, and the bag body 41 is expanded through the through hole 1a as shown in FIG. 6 (b). Arranged in the work space 3.
Since the bag body 41 is freely deformable as described above, it can easily pass through the through hole 1b. Further, the bag body 41 having passed through the through hole 1b enters the expansion space 3 and immediately returns to its original shape (here, a bottomed cylindrical shape) by the elastic restoring force of the core member 41e. The bag body 41 is expanded by passing through the through-hole 1b in a reduced state by deformation and returning to its original shape in the expansion space 3.
When the bag body 41 returns to its original shape, the position of the bag body 41 is adjusted by the vertical movement and horizontal movement of the anchor bolt 11.

Next, as shown in FIG. 6 (c), the filling material 26 is fed to the bag body 41 from the exposed surface 1 b side of the structure 1 through the filling material feeding hose 28 inserted into the bag body 41 and filled. To do. If necessary, an air bleeding hose 29 may be used in combination.
In the illustrated example, the filler feeding hose 28 is inserted into the expansion space 3 together with the bag body 41 by inserting its tip into the inside of the bag body 41 and fastening it with a fastener such as a clip. The structure to insert is illustrated. However, the present invention is not limited to this, and the bag body 41 is expanded from the exposed surface 1b side of the structure 1 through the through hole 1a after the bag body 41 is expanded (returned to the original shape) in the expansion space 3. Alternatively, the filling material feeding hose 28 may be inserted into the bag body 41 from the exposed surface 1b side of the structure 1 via the filling material feeding hose 28 and filled.
Due to the hardening of the filling material 26 filled in the bag body 41, an abutting block portion used as an engaging structure that abuts and engages with the structure 1 is formed.

  Then, the nut 14 screwed onto the anchor bolt 11 (in this example, the washer 15 externally attached to the anchor bolt 11 is interposed between the nut 14 and the contact member 13) is tightened. The abutment block portion, the nut 14, the washer 15, and the abutment member 13 engaged with the structure 1 from the soil side are fastened and fixed to the structure 1. Thereby, the anchor bolt 11 and the entire anchor 40 can be fixed to the structure 1.

  With respect to the anchor 40 and its fixing method, the anchor bolt 11 can be easily fixed to the concrete structure 1 only by work from one side (exposed surface 1b side) of the concrete structure 1. And since the whole thickness of the part in which the said through-hole 1a of the structure 1 was formed can be functioned to ensure the extraction strength of the anchor 40, the high extraction strength with respect to the concrete structure 1 can be ensured easily.

Note that the bag body is not limited to the one having the above-described configuration. For example, as shown in FIG. 8, the inner side of the bottomed cylindrical bag body 44 (expanded structure), along the inner surface of the outer peripheral wall 44 b. An elastically deformable plastic plate 45 that is curvedly deformed (elastically deformed) in a ring shape is accommodated, and the entire bag body 44 can be deformed by the deformation of the plastic plate 45. After deformation, the original shape is obtained by the elasticity of the plastic plate 45. It is also possible to adopt a configuration that can restore the image.
As the plastic plate 45, it is preferable to employ a plastic plate having a relatively small thickness (for example, 1 to 3 mm) in order to increase the degree of freedom of deformation of the bag body 44.

Further, the bag body is not limited to a bottomed cylindrical shape, but as a bag body 46 (expanded structure) shown in FIGS. 9A, 9B, 10A, and 10B. Further, it is also possible to employ a taper that is formed in a tapered shape that expands toward the opening edge 46b from the bottom 46a fixed to the tip of the anchor bolt 11.
Also, in the case of the illustrated bag body 46, as shown in FIGS. 7A and 7B, a core material storage cylinder portion 41f is provided at the opening edge portion 46b around the opening portion 46c. The structure which accommodated the linear core material 41e in the cylinder part 41f is employ | adopted.

The anchors shown in FIGS. 9A, 9B, 10A, and 10B are denoted by reference numeral 40A.
In this anchor 40A, the bag body 46 is provided in an extrapolated state with respect to the anchor bolt 11 so that the anchor bolt 11 penetrates the center of the bottom portion 46a, and around the opening of the bottom portion 46a through which the anchor bolt 11 passes. The anchor bolt 11 is sandwiched between a fixing portion 43 and a bag bottom receiving ring 42 disposed in contact with the end surface of the nut 16 on the anchor base end side (upper side in FIGS. 6A to 6C). It is attached to.
The bag body 46 is attached to the anchor bolt 11 in such a direction that the opening 46c is closer to the anchor base end side than the bottom 46a, and as described above, goes from the bottom 46a to the opening edge 46b. Accordingly, there is an advantage that the bag body 46 can be smoothly inserted into and passed through the through hole 1a.

  In addition, as a core material accommodated in the core material storage cylinder part of a bag body, it is not limited to linear core materials, such as a metal wire. For example, a plate-shaped core material such as a strip-shaped plastic plate that can be elastically deformed can be used.

In the case of this embodiment, the through-hole 1a of the structure 1 may be embedded with the filler 26 together with the filling of the filler 26 into the bag body. In this case, for example, as shown in FIGS. 6 (c) and 10 (d), the filling material 26 into the through hole 1 a is disposed by pressing the bag against the surface of the structure 1 on the soil side. Can be efficiently filled.
Thereby, the anchoring force of the anchor bolt 11 with respect to the structure 1 and the whole penetration type anchor can be raised, and the pullout strength of the anchor bolt 11 with respect to the structure 1 and the penetration type anchor can be improved.

(Fifth embodiment)
Next, the anchor 50 (penetration type anchor) of 5th Embodiment of this invention is demonstrated.
As shown in FIGS. 11A to 11C, the anchor 50 of this embodiment is obtained by adding an unbonded cylinder 51 and a reinforcing bar 52 to the anchor 40 of the above-described fourth embodiment.

The unbonding cylinder 51 is an edge cutting member for preventing the anchor bolt 11 from being embedded in the filling material 26 filled in the bag body 41. In order to prevent the portion disposed in the bag body 41 from being embedded in the filler 26, the portion is disposed so as to surround the anchor bolt 11.
In the anchor 50 illustrated in FIGS. 11A to 11C, the unbonding cylinder 51 is screwed to the anchor bolt 11 among the portions of the anchor bolt 11 disposed in the bag body 41. It is extrapolated from the fixing nut 43 that is positioned on the anchor proximal end side.

The unbonded cylindrical body 51 in the illustrated example uses a resin pipe made of a relatively hard plastic such as a polyvinyl chloride pipe or a polystyrene pipe. The unbonding cylinder 51 is provided such that one end thereof is in contact with the end face (upper end face 43 a) of the anchor nut 43 on the anchor base end side.
As shown in FIGS. 11A to 11C, the bag body 41 of the anchor 50 is passed through the through-hole 1b of the structure 1 from the upper side to the lower side, and the bag body 41 is expanded in the expansion space. When the abutment block is formed by filling the filler 26 therein, the unbonded cylinder 51 is brought into contact with the upper end surface 43a of the fixing nut 43 by its own weight, so that the bag body 41 is filled. It is possible to prevent the filler 26 from flowing into the unbonding cylinder 51 and to prevent the anchor bolt 11 from being embedded in the filler 26.

In the anchor 50, in order to stably maintain the contact state of the unbonded cylinder 51 with respect to the upper end surface 43a of the fixing nut 43, for example, an unbonded cylinder 51 is attached by sticking an adhesive tape, bonding with an adhesive, or the like. May be attached to the fixing nut 43. Further, for example, the unbonding cylinder 51 is fixed so as to be pressed against the fixing nut 43 by tightening the nut screwed to the anchor base end side of the anchor bolt 11 from the unbonding cylinder 51. The fixing means for the fixing nut 43 of the body 51 can be appropriately selected.
In this way, by fixing the unbonding cylinder 51 to the fixing nut 43 and stably maintaining the contact state of the unbonding cylinder 51 with the upper end surface 43 a of the fixing nut 43, This is preferable in terms of ensuring the stability of the inflow preventing function of the filler 26.

The anchor is not limited to a configuration in which one end of the unbonding cylinder is in contact with the upper end surface 43a of the fixing nut 43. For example, one end of the unbonding cylinder is in contact with the bottom 41a of the bag body 41. A configuration for preventing the inflow of the filler 26 into the inside can also be employed.
Also in this case, in order to stably maintain the contact state with the bag bottom 41a at one end of the unbonding cylinder, the unbonding cylinder is pressed by tightening a nut screwed to the anchor bolt 11, and an adhesive tape is applied and bonded. Adhesion with an agent can be suitably employed. In this case, for example, one end of the unbonding cylinder is press-fitted into the fixing nut 43 and fitted, and the abutting state of the unbonding cylinder with respect to the bag bottom 41a is maintained by the fixing force of the fitting. It can be adopted.

  The structure which surrounds the part arrange | positioned in the bag body 41 of the anchor bolt 11 by the cylinder 51 for unbonding extrapolated to the anchor bolt 11, and prevents the embedding of the anchor bolt 11 by the filler 26 with which the bag body 41 was filled. Is preferable from the viewpoint of preventing cracks in the contact block portion formed by curing of the filler 26 filled in the bag body 41 and ensuring stability of strength (breaking strength).

  The use of the unbonded cylinder is omitted, and a contact block portion having a structure in which a portion located inside the bag body 41 of the anchor bolt 11 is embedded by the filler 26 filled in the bag body 41 is formed. When the fastening force of the nut 14 for fastening and fixing the anchor (see FIG. 6C) is applied to the contact block portion, the filler 26 is cured by the unevenness (threads) on the outer periphery of the anchor bolt 11. The local stress concentration is likely to occur near the interface between the contact block portion and the anchor bolt 11, which may cause cracks in the contact block portion. The crack in the contact block portion increases as the pulling direction force (fixing force of the anchor to the structure) applied to the anchor bolt 11 by tightening the nut 14 or the like increases, and affects the strength of the contact block portion. Therefore, in order to avoid the crack of the contact block portion, the anchor fixing force with respect to the structure is restricted.

If it is the structure which cut off between the filler 26 in the bag body 41 and the anchor bolt 11 using the cylinder for unbonding, local stress concentration in the vicinity of the interface with the anchor bolt 11 of the contact block portion will occur. It is difficult to occur, and it is difficult to form a crack in the contact block portion.
The inventor performs a test or the like using the prototype anchor, and the unbonded cylindrical body has a configuration in which the space between the filler 26 in the bag body 41 and the anchor bolt 11 is cut using the unbonded cylindrical body. Compared to the configuration in which the contact block portion is configured such that the portion located inside the bag body 41 of the anchor bolt 11 is embedded by the filler 26 filled in the bag body 41 without using, the anchor for the structure It was confirmed that the strength of the contact block portion could be stably secured without cracking from the vicinity of the interface between the contact block portion and the anchor bolt 11 even if the fixing force of the contact block was considerably increased.

  Therefore, according to the anchor 50, the fixing force (fixing force) of the anchor to the structure can be easily increased, and as a result, the anchor bolt 11 is attached to a portion protruding from the structure 1 to the exposed surface side. The resistance to external forces such as pulling and shearing acting from the attachment can also be improved.

The unbonding cylinder is not limited to the above-described resin pipe, and a flexible resin hose or the like can also be used.
11A to 11C, the upper end of the unbonding cylinder (the upper end of the unbonding cylinder in FIGS. 11A to 11C) is positioned near the opening of the bag 41. Although the anchor 50 is illustrated, the present invention is not limited to this, and the upper end of the unbonded cylinder protrudes greatly from the opening of the bag, and protrudes from the bag of the unbonded cylinder when the anchor is fixed to the structure. It is also possible to adopt a configuration in which the formed portion is arranged to extend over substantially the entire length of the through hole 1a of the structure 1.

The reinforcing bar 52 also effectively contributes to prevention of cracks in the contact block portion.
In the anchor 50 in the illustrated example, spiral bars are used as the reinforcing bars 52. Hereinafter, when the reinforcing bar 52 indicates a spiral bar, the reinforcing bar is also referred to as a spiral bar.
The spiral muscle 52 is provided in the bag body 41 so as to be fitted outside the anchor bolt 11 and the unbonding cylinder 51. Further, the spiral muscle 52 has an outer diameter smaller than the inner diameter of the through hole 1a of the structure 1 so as not to hinder the operation of passing the bag body 41 through the through hole 1a of the structure 1.

  The reinforcing bars 52 are fixed in the embedded state in the contact block portion formed by the hardening of the filler 26 by being embedded in the filler 26 filled in the bag body 41. Thereby, the crack of a contact block part can be suppressed by the reinforcing bar 52.

  The reinforcing bars are not limited to spiral bars. For example, it may be a steel bar or the like pivotally attached to the bottom of the bag body and swingably provided in the bag body so as to extend from the pivoted portion toward the opening of the bag body. In this case, it is set as the structure which enables the operation | work which passes the bag body 41 through the through-hole 1a of the structure 1 by rotation of the steel bar centering on a pivot part.

  The present invention can employ a configuration in which the unbonded cylinder is not provided in the bag body and a reinforcing bar is provided. In this case, if it is a spiral line, it can be easily arranged near the outer periphery of the anchor bolt 11, thereby contributing to the suppression and prevention of crack formation near the interface between the contact block portion and the anchor bolt 11. It is possible.

Further, as shown in FIGS. 12A, 12B, 13A, and 13B, the structure in which the unbonded cylinder 51 and the reinforcing bars 52 such as spiral bars are provided in the bag body is as shown in FIG. Needless to say, the present invention is also applicable to the anchor 40A illustrated in FIGS. 10 (a) and 10 (b). Reference numerals 50A are attached to the anchors shown in FIGS. 12 (a), 12 (b), 13 (a), and 13 (b).
11 (a) to 11 (c), 12 (a), 12 (b), 13 (a), and 13 (b), the bag body is expanded in the expansion space 3 (returned to the original shape). ) After that, the filler feeding hose 28 is inserted into the bag body from the exposed surface 1b side of the structure 1 through the through hole 1a, and from the exposed surface 1b side of the structure 1 via the filler feeding hose 28. The structure which feeds the filling material 26 to a bag body, fills it, and obtains a contact block part is illustrated.

  The penetrating anchor according to the present invention is an anchor fixed to a concrete structure provided with soil on one side or soil such as footing, culvert, underground connecting wall, etc., and has soil on one side. The tip of the expanded structure is inserted into the through hole formed in the concrete structure in which the exposed surface is secured on the side opposite to the side, and the reduced state is obtained. The extended structure is placed in an expansion space formed so as to pass through the through hole and extend on the extension of the through hole on the structure soil side, and the expanded structure is placed in the expansion space. The structure for engagement can be expanded to be fixed, and can be fixed to the structure in a state in which the structure for engagement is engaged with the structure by tightening a nut screwed to the anchor bolt on the structure exposed surface side.

As shown in FIG. 14, in the case of the footing 4, when the lower part of the footing 4 is in the soil, the upper side of the overhanging part 4a is exposed by removing the soil on the upper side of the overhanging part 4a projecting on both sides of the lower end of the footing 4 The exposed surface 4b. Thereby, the overhang | projection part 4a of the footing 4 is made into the state by which the soil was on one side and the exposed surface was ensured on the opposite side to the soil side.
Then, the through-hole 1a penetrating up and down the overhanging portion 4a and the expansion space 3 under the overhanging portion 4a are formed, and the expanded structure 61 is formed at the tip of the anchor bolt 11 as described above. The anchor 60 is fixed to the footing 4 by inserting the distal end portion of the anchor 60 (through-type anchor) provided with the expanded structure 61 into the through-hole 1a. be able to.

  Further, as shown in FIG. 15, the present invention is also applicable to a vertical wall-like concrete structure such as an underground connecting wall 71.

  The penetration anchor according to the present invention and its fixing construction method include, for example, the fastening of a concrete structure for fixing the penetration anchor, as well as the fastening of concrete structures, the structure of an anchor bolt fixed to the structure. It can be used for attaching equipment to the part protruding from the object.

DESCRIPTION OF SYMBOLS 1 ... Concrete structure, 1a ... Through-hole, 1b ... Exposed surface, 2 ... Ground, 3 ... Expansion space, 4 ... Concrete structure (footing), 4a ... Overhang | projection part, 4b ... Exposed surface,
DESCRIPTION OF SYMBOLS 10, 10A ... Penetration anchor, 11 ... Anchor bolt, 12, 12A ... Engagement unit with a rotation member, 12a ... Bracket, 12a1 ... Female screw hole, 12a2 ... Upper surface, 12a3 ... Rotation member accommodation groove, 12a4 ... Open end, 12a5 ... back end face, 12a6 ... bottom wall part, 12b ... rotating shaft, 12c ... rotating member, 12c1 ... base end part, 12c2 ... tip part, 13 ... abutting member, 14 ... nut, 15 ... washer, 16 ... retaining member (Retaining nut),
DESCRIPTION OF SYMBOLS 20 ... Penetrating anchor, 21 ... Cylindrical body, 21a ... Slit, 21b ... Expansion part, 21c, 21d ... End ring part, 22 ... Pressure receiving ring, 22a ... Inner hole, 23a, 23b ... Spacer, 24 ... Fixing plate 25 ... Hydraulic jack, 26 ... Filler (grout), 27 ... Bag, 27a ... Opening, 27b ... Opening edge, 28 ... Filling material feeding hose, 29 ... Air venting hose,
DESCRIPTION OF SYMBOLS 30 ... Penetration anchor, 40, 40A ... Penetration anchor, 41 ... Bag body, 41a ... Bottom part, 41b ... Outer peripheral wall, 41c ... Opening part, 41d ... Opening edge part, 41e ... Core material, 41f ... Core material storage cylinder Part, 42 ... bag bottom receiving ring, 43 ... fixing nut, 44 ... bag body, 44b ... outer peripheral wall, 45 ... plastic plate, 46 ... bag body, 46a ... bottom part, 46b ... opening edge, 46c ... opening part,
50, 50A ... penetrating anchor, 51 ... unbonded cylinder, 52 ... rebar (spiral),
60 ... penetrating anchor, expansion structure, 71 ... concrete structure (underground connection wall).

Claims (10)

An anchor fixed in a penetrating state by a post-construction to a concrete structure provided with soil on one side or in the soil,
Anchor bolts passed from the exposed surface side of the concrete structure to a through hole formed in the concrete structure in which the soil is on one side and the exposed surface is secured on the opposite side of the soil side An expanded structure provided at the tip of the anchor bolt and capable of passing through the through-hole in a contracted state and being expandable from the contracted state to the periphery of the anchor bolt tip; The concrete structure is formed by screwing and tightening an abutting member abutting on the concrete structure from the exposed surface side and an anchor bolt on the opposite side of the concrete structure via the abutting member of the anchor bolt. The expansion structure is expanded in an expansion space formed on the soil side of an object, and is configured between the engagement structure engaged with the concrete structure and the contact member. ; And a nut giving the fastening force sandwiching the Nkurito structure,
The expanded structure is configured to be able to pass through the through-hole when reduced and to be able to engage with the concrete structure around the through-hole when expanded on the soil side of the concrete structure. Characteristic penetrating anchor.   The expandable structure is an engagement unit with a rotating member in which a plurality of rotating members are pivotally attached to a bracket attached to the tip of the anchor bolt with a rotation axis perpendicular to the center axis of the anchor bolt. In the engagement unit with a rotating member, the distal end portions opposite to the base end portion pivotally attached to the bracket are separated from each other from the state where the plurality of rotating members extend from the bracket along the anchor bolt. The engagement structure is constituted by being supported in a state in which the respective tip end portions are extended to the periphery of the bracket, and the concrete around the through hole in the state of the engagement structure. 2. The penetrating anchor according to claim 1, wherein the penetrating anchor is engaged with the structure from the earth side.   The engaging unit with a rotating member includes urging means for elastically urging the rotating member to rotate the rotating member in a direction inclined with respect to the anchor bolt from a state extending along the anchor bolt. The penetrating anchor according to claim 2, wherein the penetrating anchor is provided.   The expanded structure is a cylindrical body that is disposed between the abutment member and a retaining member attached to a tip of the anchor bolt by extrapolating the anchor bolt, and the cylindrical body is The central portion in the central axis direction is divided into a plurality of slits extending along the central axis of the cylindrical body, and the anchor bolt is moved in the pulling direction relative to the contact member. 2. An extended portion that is expanded and deformed by a compressive load applied between a retaining member and the abutting member and is capable of engaging with the concrete structure from the soil side. The penetrating anchor as described. Furthermore, a flexible bag body that accommodates the entire portion on the anchor tip side from the portion that is brought into contact with and engaged with the concrete structure from the soil side by expansion of the expansion portion of the cylindrical body, An opening edge around the opening is provided to be attached to the extension of the cylindrical body,
The bag body is hardened from the exposed surface side of the concrete structure after the expansion portion of the cylindrical body is expanded through a filler feeding hose passed through the through hole of the concrete structure. The penetration anchor according to claim 4, wherein a contact block portion used as the engagement structure is formed by hardening of the filler. The expandable structure is a flexible bag attached to a tip of the anchor bolt, and the bag is formed around a periphery of an opening opposite to the bottom from a bottom fixed to the tip of the anchor bolt. An opening edge is disposed so as to surround the anchor bolt, and the opening edge is freely deformable by an elastically deformable core member provided along the opening edge,
In the bag body, the edge of the opening is deformed from the exposed surface side of the concrete structure together with the anchor bolt tip, and after passing through the through hole, the opening is disposed in the expansion space, and the opening is the core material. In a state expanded by the elasticity of the concrete structure, the curable filler is filled from the exposed surface side of the concrete structure through the filler feeding hose passed through the through hole of the concrete structure. The penetrating anchor according to claim 1, wherein a contact block portion used as the engagement structure is formed by hardening of the filler.   The bag body is provided with an unbonding cylinder body that is disposed so as to surround the anchor bolt by being extrapolated to the anchor bolt and prevents the anchor bolt from being embedded by a filler filled in the bag body. The penetrating anchor according to claim 6.   The penetrating anchor according to claim 6 or 7, wherein the bag body is formed in a tapered shape that expands toward the opening edge side from a bottom portion fixed to a tip end of the anchor bolt.   The penetration anchor according to any one of claims 6 to 8, wherein a reinforcing bar embedded in the filler is provided in the bag body. A fixing construction method for fixing the penetrating anchor according to any one of claims 1 to 9 to a concrete structure provided in the soil or in a state where there is soil on one side,
Passing the anchor bolt from the exposed surface side of the concrete structure through a through hole formed in the concrete structure in which the soil is on one side and the exposed surface is secured on the opposite side of the soil side, The expanded structure at the tip of the anchor bolt is expanded in an expansion space formed on the soil side of the concrete structure to form the engagement structure, and is extrapolated to the anchor bolt. The abutting member is brought into contact with the concrete structure from the exposed surface side, and the nut bolted to the opposite side of the concrete structure via the abutting member of the anchor bolt is tightened, The anchor bolt is fastened to the concrete structure by fastening the concrete structure between the expansion structure engaged with the concrete structure and the contact member. Fixing construction method of the through anchor, characterized in that fixed to the object.

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