JP2011247049A - Method for fixing hole-in anchor bolt device and hole-in anchor bolt device for use therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for fixing a hole-in anchor bolt device, which can prevent risk of dropping-off of an anchor bolt due to self weight under vibration or at cold temperature and risk of insufficient fixing of an anchor bolt before hardening of an anchor fastening agent, with reinforced withdrawal resistance of the anchor bolt not only by fixing at an inner part side of a bore hole but also sufficiently fixing at an opening side of the bore hole, and a hole-in anchor bolt device for use therein.SOLUTION: A method for fixing a hole-in anchor bolt device comprises a boring step, an inserting step for inserting a hollow expandable anchor bolt body in a bore hole, a tip expanding step for expanding a tip of the hollow expandable anchor bolt body, an anchor fixing agent injecting step for injecting an anchor fixing agent from a base end of the tip expandable anchor bolt body, an anchor fixing agent filling step for filling a gap from an inner part toward an opening with the anchor fixing agent leaking from a split groove at the tip of the hollow expandable anchor bolt body.

Description

  The present invention relates to a post-installed anchor bolt tool fixing method and a post-installed anchor bolt tool used therefor.

  Conventionally, when fixing an object to be fixed to a wall or ceiling made of concrete or mortar, a method called anchor bolt is inserted and fixed in a hole drilled in concrete or mortar. .

  This method is a post-installation type anchor bolt fixing method, in which after concrete is placed, the anchor bolt is fixed by drilling the concrete or the like using a drill or the like.

  Post-installed anchor bolts are fixed by placing concrete into the concrete using a drill or other drilling tool, injecting adhesive into the drill, and then inserting the anchor bolt into the drill. There is a method of using an adhesive for fixing (for example, Patent Document 1).

  Also, anchor bolts are fixed with nylon nuts.

  There is also a method for fixing an adhesive anchor bolt in which an adhesive-encapsulated capsule is inserted by inserting an adhesive-encapsulated capsule into a perforation and then driving an anchor bolt to destroy the adhesive-encapsulated capsule, thereby causing a chemical reaction. There is (for example, Patent Document 2).

  Furthermore, an anchor bolt having a taper-shaped widened portion that is in contact with the back of the perforation and that expands the tip of the anchor bolt is used to expand the tip of the anchor bolt inside the perforation so that the physical anchor bolt is not easily removed from the perforation. There is also a fixing method (for example, Patent Document 3).

  Although there are various methods as described above, for example, as described in Patent Document 1, it is often performed to insert an anchor bolt into a perforation of concrete or the like and then insert and fix the anchor bolt.

  However, in the method of inserting the anchor bolt after inserting the adhesive into the perforation, when there are voids or cavities in the perforation, if the adhesive is first inserted, the adhesive is not sufficiently filled, and the anchor bolt does not work well. It cannot be fixed. In that case, there was a problem that the adhesive had to be put in again.

  Further, in the conventional anchor bolt fixing method, emphasis is placed on the fixing on the back side of the drilling hole, but there is a problem that the fixing on the side of the drilling opening is neglected.

  Furthermore, a method of fixing a peeling prevention net with an anchor bolt is also known as a wall surface reinforcement such as a tunnel inner wall surface (Patent Document 4).

  In order to fix a net member or the like to such a tunnel inner wall surface using anchor bolts, not only the fixing on the drilling back side but also the fixing on the drilling opening side is important.

JP 2001-89716 A Japanese Patent Application Laid-Open No. 61-2779 JP-A-10-024340 JP 2004-293150 A

  The present invention has been made in view of the above problems, and anchor bolts are insufficiently fixed before the anchor bolts fall off due to their own weight even under vibrations or in cold weather, or before the anchor fixing agent is sufficiently cured. Fixing the anchor bolt tool after the anchor bolt is reinforced so that not only the perforated part at the back side but also the perforated part opening side is sufficiently fixed. It is an object of the present invention to provide a method and a post-installed anchor bolt device used therefor.

  A post-installed anchor bolt tool fixing method according to the present invention includes a drilling step for opening a drilled portion in a base material, and a hollow expanded anchor bolt body having a through hole inside and a tip split groove at the tip Inserting into the perforated portion, a distal end expanding step of pressing the distal end of the hollow expanded anchor bolt body to expand the distal end of the hollow expanded anchor bolt main body, and the hollow expanded An anchor fixing agent injection step for injecting an anchor fixing agent from the proximal end portion of the anchor bolt main body, and the anchor fixing agent is leaked from the distal end split groove of the hollow expanded anchor bolt main body so that the anchor fixing agent is disposed at the back of the perforated portion. And an anchor fixing agent filling step of filling the gap from the opening toward the opening.

  The hollow expanded anchor bolt main body is physically fixed to the deep part of the perforated part by a distal end expanding step of expanding the distal end of the hollow expanded anchor bolt main body. Thus, the hollow expanded anchor bolt body is physically fixed by the distal end portion of the expanded hollow expanded anchor bolt body until the anchor fixing agent injected into the perforated portion exhibits a predetermined strength. There is an advantage that can be.

  This has the advantage of being able to cope with the delay in intensity development in winter. Furthermore, even when the organic anchor fixing agent is burned due to, for example, a fire, there is an effect that the hollow expansion anchor bolt main body can be prevented from falling off by physical fixing.

  Further, in the post-installed anchor bolt tool used in the post-installed anchor bolt tool fixing method of the present invention, the front end portion is smaller in diameter than the through-hole inner diameter of the hollow expanded anchor bolt main body, and the rear end portion is the through hole. It is preferable to further include an expansion assisting member having a tapered portion whose diameter is larger than the inner diameter of the hole. In order to easily expand the tip of the hollow expanded anchor bolt body, it is preferable to use the expansion assisting member. An expansion stopper is preferably used as the expansion assisting member. In addition, the thing including a hollow expansion anchor bolt main body and the expansion auxiliary member is also included in the post-construction anchor bolt device after the present specification.

  In order to use the expansion assisting member, the distal end portion of the expansion assisting member is inserted in advance into the distal end portion of the hollow expanding anchor bolt body, and the proximal end portion of the hollow expanding anchor bolt body is pressed. And the front-end | tip part of the said hollow expansion anchor bolt main body is pressed and expanded by the said expansion auxiliary member.

  The anchor fixing agent to be injected in the anchor fixing agent injecting step is not particularly limited as long as the hollow expanded anchor bolt main body is fixed in the perforated part. The inorganic anchor fixing agent or the organic anchor fixing agent is not particularly limited. Either can be used. Examples of inorganic anchor fixing agents include quick setting cements, and examples of organic anchor fixing agents include adhesives and resins.

  As the inorganic anchor fixing agent, a two-component type containing a main agent containing cement and a cement-based expansion material, a water reducing agent, a thickener and / or a setting retarder and a cement hardening accelerator may be used.

Examples of the cement include ordinary Portland cement, early-strength Portland cement, ultra-early strong Portland cement, moderately hot Portland cement, low heat Portland cement, sulfate-resistant Portland cement, jet cement, and alumina cement. The brane specific surface area of the cement is not particularly limited, but is preferably about 2500 to 6500 cm ² / g.

  Examples of the cement-based expansion material include calcium sulfoaluminate-based expansion agents and calcium oxide-based expansion agents. Of these, calcium sulfoaluminate-based swelling agents are particularly preferable. The content of the calcium sulfoaluminate-based swelling agent is not particularly limited, but is preferably about 1 to 30 parts by weight with respect to 100 parts by weight of cement. When the amount is less than 1 part by weight, the effect as a swelling agent is reduced. Moreover, when it exceeds 30 weight part, there exists a possibility that expansion | swelling destruction may arise.

  The thickener maintains the viscosity of the kneading liquid in an appropriate manner, so that the simultaneous mixing of materials can be controlled to separate and deposit, preventing bleeding and increasing homogeneity. It is valid. Examples of the thickener include a cellulose thickener, an acrylic thickener, and a biopolymer thickener. These can be used alone or in combination of two or more. Although content of a thickener is not specifically limited, About 0.001-1 weight part is preferable with respect to 100 weight part of cement.

  Further, as the inorganic anchor fixing agent, a one-component type containing a cement having a fast setting property, a cement-based expansion material, a water reducing agent, and a thickening agent may be used.

  As the water reducing agent, for example, polycarboxylic acid-based, naphthalene-based, aminosulfonic acid-based high-performance AE water reducing agents are preferably used.

  Further, fine aggregate such as sand or an organic solvent may be added to the inorganic anchor fixing agent in order to improve workability.

  There is no particular limitation on the type of the adhesive, and it can be used as a one-component curable type or a two-component curable type, and any adhesive such as an acrylic or epoxy type can be used. Also, the structural viscosity index (hereinafter referred to as SVI) of the adhesive preferably has an SVI value of 1.5 or more, more preferably 1.5 to 10, and even more preferably 2 to 7 to give good results. Moreover, it is preferable that the viscosity of an adhesive agent is 10-500 Pa.s, More preferably, 50-200 Pa.s brings about a favorable effect.

  In the anchor sticking agent filling step, the anchor sticking agent leaks not only from the tip of the through hole of the hollow expanding anchor bolt body but also from the split groove at the tip of the hollow expanding anchor bolt main body. The gap is filled from the back of the part toward the opening. Thus, since the anchor fixing agent is filled in the gap from the back of the perforated portion toward the opening, it is possible to reliably fill the anchor fixing agent.

  In addition, you may make it perform the anchor sticking agent opening part overflowing process which overflows an anchor sticking agent from the opening part of the said perforation part after the said anchor sticking agent filling process as needed. By overflowing the anchor fixing agent from the opening of the perforated part, the perforated part opening side is sufficiently fixed, and the pull-out resistance of the anchor bolt body is reinforced. That is, the piercing portion opening side is sufficiently fixed by the overflow effect caused by overflowing the anchor fixing agent.

  The hollow expanded anchor bolt temporarily fixed to the base material by a distal end portion expanding step in which an annular flange is provided on the hollow expanded anchor bolt body, and a distal end portion of the hollow expanded anchor bolt body is expanded. It is preferable to prevent the anchor fixing agent injected by the anchor fixing agent injection step of injecting the anchor fixing agent from the base end portion of the main body from leaking out of the perforated portion due to vibration of the object before curing. It is.

  In addition, you may make it fix the said annular collar part on the base material surface with the anchor sticking agent overflowed by the said anchor sticking agent overflow process. This is also due to the overflowing effect of the anchor sticking agent, and the anchoring agent overflowed in the anchor sticking agent overflowing step is used to fix the annular flange to the surface of the base material. Is well done.

  As the annular flange, since a normal nut is sufficient, there is no need to use a conventional nylon nut or the like, and there is an advantage that the cost of the nylon nut can be reduced.

  Moreover, it is preferable that the said annular collar part is made detachable. Furthermore, the annular flange is preferably a washer and / or a nut. The annular flange may be integrally attached to the hollow expanded anchor bolt main body to form a hollow expanded anchor bolt main body with an annular flange, or may be a separate body. In the specification of the present application, the annular flange portion such as a washer and / or a nut separated from the hollow expanded anchor bolt main body is also referred to as a post-installed anchor bolt tool.

  In addition, when using an annular flange for the fixing method of the post-construction anchor bolt tool according to the present invention, the annular flange such as a washer and / or a nut is made detachable, and the hollow expanded anchor bolt body is used as a perforated portion. The annular flange may be fixed to the surface of the base material with the anchor fixing agent that is attached after insertion and overflowed in the anchor fixing agent overflowing step.

  Further, when using the annular flange, the annular flange such as a washer and / or nut is made detachable, and is attached after the hollow expanded anchor bolt is inserted into the drilled portion, and overflowed by the anchor fixing agent overflowing step. The annular flange may be fixed to the base material surface with an anchor fixing agent.

  Further, in the case of using an annular flange, the annular flange is used with an anchor fixing agent overflowed by the anchor fixing agent overflowing step using a hollow expanded anchor bolt with an annular flange such as a hollow anchor bolt with a washer and / or a nut. May be fixed to the surface of the base material. An air vent hole may be provided in the annular flange.

  Moreover, as said perforated part, it is preferable that the deeper part is made into the expanded bottom perforated part whose diameter was larger than the opening part. Since the perforated portion is an expanded bottom perforated portion, when the distal end portion of the hollow expanded anchor bolt is expanded by the distal end portion expanding step, the pull-out resistance of the hollow expanded anchor bolt further increases. It is.

  Furthermore, it is preferable to fix the adherend to the surface of the base material with the anchor sticking agent overflowed in the anchor sticking agent overflowing step. Examples of adherends include nets made of fibers and / or synthetic resins, sheets made of fibers and / or synthetic resins, various inorganic decorative plates, sound absorbing materials, heat insulating materials, metal materials such as wire mesh, Examples include steel.

  Moreover, it can also comprise so that the said to-be-adhered thing may be fixed further with the said annular collar part.

  Further, the base material for opening the perforated part is preferably concrete, mortar, or brick.

  Furthermore, the first aspect of the post-construction anchor bolt tool according to the present invention is a post-construction anchor bolt tool for use in the fixing method of the post-construction anchor bolt tool according to the present invention, and a hollow expanded anchor bolt main body, A tip split groove provided in the longitudinal direction of the tip of the hollow expanded anchor bolt main body is provided. In addition, you may provide at least one main body anchor fixing agent flow path for an anchor fixing agent to flow in the longitudinal direction of the base end part of a hollow expansion anchor bolt main body.

  There is no particular limitation on the length of the leading end split groove, and it is sufficient that the leading end is widened.

  As the main body anchor fixing agent flow path, the anchor fixing agent may be overflowed from the proximal end side of the hollow expanded anchor bolt main body, for example, the proximal end longitudinal direction of the hollow expanded anchor bolt main body. A groove, a split groove, or the like provided in is suitable. Further, the length of the main body anchor fixing agent channel is not particularly limited as long as the anchor fixing agent can overflow from the proximal end side of the hollow expanded anchor bolt main body. .

  Furthermore, the second aspect of the post-construction anchor bolt tool according to the present invention is a post-construction anchor bolt tool for use in the fixing method of the post-construction anchor bolt tool according to the present invention, It includes a plurality of front end split grooves provided in the longitudinal direction of the front end portion of the hollow expanded anchor bolt main body, and an annular flange portion attached to the peripheral surface of the hollow expanded anchor bolt main body. Note that at least one air vent hole may be provided in the annular flange.

  The air vent hole provided in the annular flange is not particularly limited, as long as air can pass therethrough, and an insertion hole, a notch, or the like is preferable. In addition, it is preferable that, for example, the inner peripheral surface of the annular flange portion is cut out at a plurality of positions so that the inner surface of the annular expanded anchor bolt body is in the vicinity of the peripheral surface of the hollow expanded anchor bolt body when attached to the hollow expanded anchor bolt body. is there.

  In addition, by comprising in this way, since the overflow of an anchor sticking agent is further accelerated | stimulated, there also exists an advantage that the overflow effect is exhibited rapidly.

  The anchor fixing agent does not dissolve in water, and cures in water to express sufficient strength. In the post-installation anchor bolt tool fixing method according to the present invention, since the anchor fixing agent is filled toward the opening so as to expel water and air from the back of the perforated part, water and air hardly remain in the perforated part. There is an advantage. Therefore, the post-installation anchor bolt fixture fixing method according to the present invention can be suitably used for underwater construction.

  According to the post-installed anchor bolt fixture fixing method according to the present invention, the anchor bolt is insufficiently fixed before the anchor bolt falls off due to its own weight or the anchor fixing agent is sufficiently cured even under vibration or in cold weather. In addition to avoiding the danger, not only the perforation part back side but also the perforation part opening part side is sufficiently fixed, so that the pulling resistance of the anchor bolt can be reinforced.

  Moreover, before the anchor fixing agent is sufficiently cured, there is an effect that it is possible to avoid a risk that the anchor bolt is not sufficiently fixed by leaking out of the perforated portion.

  In addition, since the object to be fixed such as a net can be fixed to the surface of the base material with the anchor fixing agent overflowed by the anchor fixing agent overflowing process, the anchor bolt can be securely fixed when fixing the peeling prevention net or the like. There is also an effect.

  Even if there are voids or cavities in the perforated part, the anchor fixing agent is filled without any gaps in the perforated part, so there is no need to refill the anchor fixing agent, and an adhesive is applied to the conventional perforated part. Compared with the method of inserting the anchor bolt after inserting, there is also an effect that the construction can be performed quickly and reliably.

  According to the post-construction anchor bolt tool according to the present invention, it can be used in the fixing method of the post-construction anchor bolt tool according to the present invention, and not only the perforation part back side is fixed, but the perforation part opening part side is also sufficient. By adhering to the anchor bolt, it is possible to reinforce the pull-out resistance of the anchor bolt.

FIG. 1 is a perspective view showing one embodiment of a post-installed anchor bolt device according to the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of the hollow expanded anchor bolt body into which the expansion assisting member is inserted in FIG. 3 is a cross-sectional view taken along line IIIa-IIIa in FIG. FIG. 4 is a schematic explanatory view showing one embodiment of a method for fixing a post-installed anchor bolt device according to the present invention, wherein (a) shows a state in which a perforated portion is opened in a base material, and (b) shows a hollow shape. A state in which the tip of the expanded anchor bolt body is expanded, (c) a state in which an anchor fixing material is injected using an injection nozzle, and (d) a state in which the anchor fixing material is filled in the perforated portion, e) is a state where the anchor fixing material overflows from the opening of the perforated part, (f) is a state where the injection nozzle is removed, and (g) is a post-installed anchor after tightening the nut to the anchor bolt and fixing it with the anchor fixing material. Each of the bolts is shown in a fixed state. FIG. 5 shows an embodiment of a post-installed anchor bolt washer according to the present invention. FIG. 6 is a schematic explanatory view showing a case where a net is fixed using another embodiment of a fixing method for post-installed anchor bolts according to the present invention, wherein (a) shows a drilled portion in a base material. (B) is a state where the tip of the hollow expanded anchor bolt body is expanded and the net is covered on the surface of the base material, (c) a state where the anchor fixing material is injected using an injection nozzle, d) is a state where the anchor fixing material is filled in the perforated part, (e) is a state where the anchor fixing material is overflowed from the opening of the perforated part, and (f) is a state where the injection nozzle is removed and a washer is attached. (G) shows a state in which the nut, the washer and the net are fixed with the anchor fixing material after the nut is fastened to the anchor bolt, and then the construction anchor bolt tool is fixed. FIG. 7 is an enlarged view of the main part of FIG. FIG. 8 is an enlarged view of a main part showing a state in which a net as an adherend is fixed to a base material. FIG. 9 is a perspective view showing another embodiment of the post-installed anchor bolt device according to the present invention.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. However, the illustrated examples are shown by way of example, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention. . In the accompanying drawings, the same or similar members are denoted by the same reference numerals.

  1-4, the code | symbol 10A shows one Embodiment of the post-construction anchor bolt tool which concerns on this invention. As shown in FIGS. 1 to 3, the post-installed anchor bolt device 10 </ b> A includes a hollow expanded anchor bolt body 12 having a through hole 20 therein and a thread groove 22, and a hollow expanded anchor bolt body 12. And a plurality of front end split grooves 14a to 14d (four in the illustrated example) provided in the longitudinal direction of the front end portion 24. In addition, in FIG. 1, the length L1 of the front end split grooves 14a-14 showed the example made into about 1/5 of the full length of the hollow expansion anchor bolt main body 12. As shown in FIG.

  In the example of illustration, the example of what is called a total screw which provided the thread groove in the whole peripheral surface of the hollow expansion anchor bolt main body 12 was shown. Thus, it is preferable to provide a thread groove on the entire peripheral surface of the hollow expanded anchor bolt body 12 because there is an advantage that the nut 42 can be attached to any position. However, since the nut 42 can be attached if the base end portion 26 of the hollow expanded anchor bolt body 12 is provided with a thread groove, it is not always necessary to provide the thread groove on the entire peripheral surface.

  In the illustrated example, the outer diameter of the hollow expanded anchor bolt body 12 is 8 mm, and the inner diameter is 4 mm.

  Further, the post-installed anchor bolt device 10 </ b> A has an expansion plug as the expansion assisting member 18. Furthermore, a nut 42 is detachably attached to the post-construction anchor bolt device 10A as an annular flange 40A.

  The expansion assisting member 18 has a tip parallel portion 18a and a tapered portion 19a connected to the tip parallel portion 18a. In the illustrated example, the example in which the distal end parallel portion 18a is about one third of the entire length of the expansion assisting member 18 is shown.

  In the illustrated example, the nut 42 is detachably attached to the post-construction anchor bolt tool 10A as the annular collar portion 40A. However, the nut 42 and the washer are integrally formed as the annular collar portion 40A to the post-construction anchor bolt tool 10A. You may comprise so that it may attach to. Furthermore, it is needless to say that the post-construction anchor bolt tool 10A may have a configuration in which the annular flange 40A is not provided.

  The hollow expanded anchor bolt main body 12 has a structure in which the distal end portion 24 is expanded by pushing the expansion assisting member 18 from the distal end portion 24 into the through hole 20.

  FIG. 9 shows another embodiment of the post-construction anchor bolt tool according to the present invention. In FIG. 9, the code | symbol 10C shows the post-construction anchor bolt tool which concerns on this invention. In the plurality of tip split grooves 14a to 14d (four in the illustrated example) of the post-installed anchor bolt device 10C, the length L2 of the tip split grooves 14b and 14d is longer than the length L3 of the tip split grooves 14a and 14b. Further, the expansion assisting member 18 of the post-installed anchor bolt device 10C has a tip parallel portion 18b shorter than the tip parallel portion 18a of FIG. 1 described above (in the example shown, the tip parallel portion 18b is The post-installation anchor bolt tool 10A in FIG. 1 is the same as the post-installation anchor bolt tool 10A except that the expansion assisting member 18 has a length that is approximately one fifth of the total length.

  Next, one embodiment of the fixing method according to the present invention when fixing the post-construction anchor bolt tool 10A to the concrete base material of the ceiling in the tunnel using the post-construction anchor bolt tool 10A configured as described above is shown. 4 will be described.

  First, the perforated part 28 is opened in the concrete base material 32 (perforating process). By this perforation process, a perforated portion 28 is formed as shown in FIG. In the illustrated example, the perforated part 28 is an expanded bottom perforated part in which the back part 30 has a diameter larger than that of the opening part 38. Thus, since the hollow expanded anchor bolt body 12 is more difficult to be removed when the inner diameter of the perforated portion 28 is larger than that of the opening 38, the perforated portion 28 is preferably an expanded bottom perforated portion.

  Next, the hollow expanded anchor bolt body 12 is inserted into the perforated portion 28 (insertion step). And the front-end | tip part 24 of the said hollow expansion anchor bolt main body 12 is pressed, and the front-end | tip part 24 of the said hollow expansion anchor bolt main body 12 is expanded (front-end | tip part expansion process). In the illustrated example, since an expansion plug is used as the expansion assisting member 18, the distal end portion 24 is expanded by pushing the expansion assisting member 18 from the distal end portion 24 into the through hole 20. In this way, the distal end portion 24 of the hollow expanded anchor bolt main body 12 is expanded in the perforated portion 28 (FIG. 4B).

  Then, the anchor fixing agent 36 is injected from the proximal end portion 26 of the hollow expanded anchor bolt body 12 using the injection nozzle 34 (anchor fixing agent injection step). In the illustrated example, a two-component adhesive is injected as the anchor fixing agent 36 (FIG. 4C).

  Then, the anchor fixing agent 36 is leaked from the distal end split grooves 14 a to 14 d of the expanded distal end portion 24 of the hollow expanded anchor bolt main body 12, and the anchor fixing agent 36 is transferred from the back portion 30 of the drilling portion 28 to the opening portion 38. Then, the gap is filled (anchor fixing agent filling step) (FIG. 4D).

  Furthermore, the anchor fixing agent 36 is caused to overflow from the opening 38 of the perforated portion 28 (an anchor fixing agent opening overflow process) (FIG. 4E). In the illustrated example, the anchor sticking agent 36 is overflowed. However, the anchor sticking agent opening overflow process is not necessarily performed as necessary.

  Then, the injection nozzle 34 is removed (FIG. 4 (f)), and the annular flange 40A (nut 42) is fixed to the surface of the concrete base material 32 with the anchor fixing agent 36 overflowed by the anchor fixing agent overflowing step. The anchor bolt tool 10A is fixed (FIG. 4G). In this way, the post-construction anchor bolt tool 10A is fixed.

  Next, FIG. 6 shows a case where a net as an object to be fixed is fixed to a concrete base material of a ceiling inside a tunnel using another embodiment of the fixing method according to the present invention.

  In the example of FIG. 6, as the post-construction anchor bolt device 10 </ b> B, the post-construction anchor bolt device 10 </ b> B has a detachable annular flange portion 40 </ b> B, and the annular flange portion 40 </ b> B is a nut 42 and a washer 44. . The post-construction anchor bolt tool 10B is the same as the post-construction anchor bolt tool 10A shown in FIG. 1 except that the washer 44 is detachably provided, and thus detailed description thereof is omitted.

  As shown well in FIG. 5, the washer 44 has a center hole 46 in the center and air vent holes 48a to 48d through which air passes. As the air vent holes 48 a to 48 d, four notches with a width D of 3 mm are provided on the inner peripheral surface of the washer 44.

  As shown in FIG. 6, first, the perforated part 28 is opened in the concrete base material 32 (perforating process). By this drilling step, the punched portion 28 is formed as shown in FIG. In the illustrated example, the perforated part 28 is an expanded bottom perforated part in which the back part 30 has a diameter larger than that of the opening part 38. Thus, since the hollow expanded anchor bolt body 12 is more difficult to be removed when the inner diameter of the perforated portion 28 is larger than that of the opening 38, the perforated portion 28 is preferably an expanded bottom perforated portion.

  Next, the hollow expanded anchor bolt body 12 is inserted into the perforated portion 28 (insertion step). And the front-end | tip part 24 of the said hollow expansion anchor bolt main body 12 is pressed, and the front-end | tip part 24 of the said hollow expansion anchor bolt main body 12 is expanded (front-end | tip part expansion process). In the illustrated example, since an expansion plug is used as the expansion assisting member 18, the distal end portion 24 is expanded by pushing the expansion assisting member 18 from the distal end portion 24 into the through hole 20. In this way, the distal end portion 24 of the hollow expanded anchor bolt main body 12 is expanded in the perforated portion 28 (FIG. 6B).

  At the same time, the adherend 46 (net in the illustrated example) is coated on the surface of the concrete base material 32 and temporarily fixed.

  Then, the anchor fixing agent 36 is injected from the proximal end portion 26 of the hollow expanded anchor bolt body 12 using the injection nozzle 34 (anchor fixing agent injection step). In the illustrated example, a two-component adhesive is injected as the anchor fixing agent 36 (FIG. 6C).

  Then, the anchor fixing agent 36 is leaked from the distal end split grooves 14 a to 14 d of the expanded distal end portion 24 of the hollow expanded anchor bolt main body 12, and the anchor fixing agent 36 is transferred from the back portion 30 of the drilling portion 28 to the opening portion 38. Then, the gap is filled (anchor fixing agent filling step) (FIG. 6D).

  Further, the anchor fixing agent 36 is caused to overflow from the opening 38 of the perforated portion 28 (an anchor fixing agent opening overflow process) (FIG. 6E). In the illustrated example, the anchor sticking agent 36 is overflowed. However, the anchor sticking agent opening overflow process is not necessarily performed as necessary.

  Then, the injection nozzle 34 is removed, and the fixed object 46 is fixed to the surface of the concrete base material 32 with the anchor fixing agent 38 overflowed in the anchor fixing agent overflowing process, and further fixed with the washer 44 (FIG. 6 (f )). Furthermore, the nut 42 is attached and fixed (FIG. 6 (g)). At this time, the washer 44 and the nut 42 have an effect of preventing the anchor fixing agent 36 injected in the anchor fixing agent injection step from leaking out of the perforated portion 28 due to the vibration of the object before curing. At this time, the anchor fixing agent 38 flows out from the air vent holes 48 a to 48 d of the washer 44 and is fixed integrally with the nut 42. FIG. 7 is an enlarged view of the state of FIG. In this way, the post-construction anchor bolt tool 10B is fixed.

  Thereby, as shown in FIG. 8, the net as the adherend 46 is fixed to the concrete base material 32.

  Thus, according to the fixing method of the post-construction anchor bolt tool according to the present invention and the post-construction anchor bolt tool used therefor, not only the perforation part back side but also the perforation part opening part side is sufficiently secured. Thus, it is possible to reinforce the pull-out resistance of the anchor bolt.

10A, 10B, 10C: Post-construction anchor bolt tool, 12, 13: Hollow expanded anchor bolt main body, 14a-14d: Tip split groove, 18: Expanding auxiliary member, 18a, 18b: Tip parallel part, 19a, 19b: Tapered part, 20: through hole, 22: screw groove, 24: tip part, 26: base end part, 28: perforated part, 30: back part, 32: concrete base material, 34: injection nozzle, 36: anchor fixing agent , 38: opening, 40A, 40B: annular flange, 42: nut, 44: washer, 46: object to be fixed, 48a to 48d: air vent hole, 50: center hole, D: width, L1 to L3: long Well.

Claims (8)

  A drilling step for opening the drilled portion in the base material, an insertion step of inserting a hollow expanded anchor bolt body having a through-hole inside and a tip split groove at the tip into the drilled portion; A distal end portion expanding step for expanding the distal end portion of the hollow expanded anchor bolt main body by pressing the distal end portion of the open anchor bolt main body, and injecting an anchor fixing agent from the proximal end portion of the hollow expanded anchor bolt main body Anchor sticking agent filling step, and anchor sticking agent filling in which the anchor sticking agent is leaked from the end split groove of the hollow expanded anchor bolt main body and the anchor sticking agent is filled in the gap from the back of the perforated part toward the opening. And a fixing method for post-construction anchor bolts.   The hollow expanded anchor bolt main body is provided with an annular flange on the hollow expanded anchor bolt main body, and the hollow expanded anchor bolt main body temporarily fixed to the base material by a distal end expanding step of expanding the distal end of the hollow expanded anchor bolt main body. The anchor fixing agent injected by the anchor fixing agent injection step of injecting the anchor fixing agent from the base end portion is prevented from leaking out of the perforated portion due to vibration of the object before curing. The fixing method of the post-construction anchor bolt tool according to claim 1.   The method for fixing a post-construction anchor bolt tool according to claim 1 or 2, wherein the perforated part is a bottom-extended perforated part whose inner part is larger in diameter than the opening.   The method for fixing a post-installed anchor bolt tool according to any one of claims 1 to 3, wherein the anchor fixing agent is an inorganic anchor fixing agent or an organic anchor fixing agent.   The inorganic anchor fixing agent is a two-component type containing a main component containing cement and a cement-based expansion agent, a water reducing agent, a thickener and / or a setting retarder, and a cement hardening accelerator. The fixing method of the post-construction anchor bolt tool according to claim 4.   The fixing of a post-construction anchor bolt device according to claim 4, wherein the inorganic anchor fixing agent is a one-component type containing a cement having a fast setting property, a cement-based expansion material, a water reducing agent, and a thickening agent. Method.   A post-installed anchor bolt device for use in the fixing method according to claim 1, comprising: a hollow expanded anchor bolt main body; and a distal end split groove provided in a longitudinal direction of a distal end portion of the hollow expanded anchor bolt main body. Post-installed anchor bolts characterized by being made.   A post-installed anchor bolt device for use in the fixing method according to claim 2, wherein the hollow expanded anchor bolt main body, the distal end split groove provided in the longitudinal direction of the distal end portion of the hollow expanded anchor bolt main body, and the hollow A post-installed anchor bolt device, comprising: an annular collar portion attached to the peripheral surface of the expanded anchor bolt main body.

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