JP2014196651A - Anchorage construction method of foundation work or structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchorage construction method of a foundation work or structure, enabling re-tension of a subgrade anchor, allowing work to be performed without being affected by weather, and reducing the number of man-hours at the work site.SOLUTION: In an anchorage construction method of a foundation work or structure: a subgrade anchor 4 is inserted into and arranged in a burying hole 5, a tip 4A of the subgrade anchor 4 is made to penetrate and project, and an opening of the burying hole 5 is blocked by a contraction member 6 which is contractively deformable by pressing; a hardener 9 is injected into the burying hole 5 through a filler injection pipe 8 to fill the burying hole 5 with the hardener 9; the filler injection pipe 8 projecting from the contraction member 6 is removed; and the tip 4A of the subgrade anchor 4 projecting from the contraction member 6 is made to penetrate to arrange a foundation work 2 or a structure 3 and a bearing part 10 on a subgrade 1A, a pressing metal fitting 11 is attached to the tip 4A of the subgrade anchor 4 protrudingly projecting, and the pressing metal fitting 11 is fastened to crimp the subgrade anchor 4.

Description

  The present invention relates to a foundation work or a structure fixing method for fixing a foundation work or a structure to a ground surface or a concrete surface using a ground anchor.

  Concrete frame works and foundations for avalanche prevention fences, etc. installed on the ground and concrete surfaces using ground anchors, are subject to ground and concrete due to freezing and thawing, erosion due to wind and rain, or ground subsidence due to earthquakes and soil softening. There may be gaps between the surfaces.

  The ground anchor is strong in the tensile direction but weak in the shear direction. Therefore, if a roll such as an earthquake occurs with the gap as described above, the shear force is applied to the location located in the gap. If a gap occurs, re-tension the ground anchor by retightening the nut, etc., and re-connect the concrete frame work or the avalanche prevention fence foundation work to the ground or concrete surface again. It is necessary to press-fit and keep it in close contact at all times.

  However, in the conventional fixing method, the hardener such as mortar that fixes the ground anchor filled in the buried hole and the hardener filled in the gap between the concrete method and the avalanche prevention fence foundation work and the ground anchor are integrated. To form a concrete pillar, and this concrete pillar abuts against the washer, making it impossible to push down the washer, or the foundation work of concrete method frame work or avalanche prevention fence is bonded and fixed to the ground anchor by hardener Could not re-tension the ground anchor.

  In addition, a fixing method as shown in Patent Document 1 in which the ground anchor can be re-tensioned has been proposed. However, the fixing method in Patent Document 1 requires an on-site elastic body filling operation. The work takes time and is affected by the weather, which makes it difficult to work in rainy and winter seasons.

Japanese Patent No. 4804561

  The present invention solves the problems of the conventional method as described above, allows the ground anchor to be re-tensioned, can work without being affected by the weather, and reduces the number of man-hours on site. The purpose is to propose a groundbreaking foundation work or structure fixing method with excellent workability.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A foundation or structure fixing method for fixing the foundation work 2 or the structure 3 to the ground 1A or the concrete surface 1B by using the ground anchor 4, and the base end 4B side of the ground anchor 4 is connected to the ground 1A or the concrete surface. The surface of the ground 1A is provided with a contracting member 6 that is inserted into and disposed in the buried hole 5 drilled in 1B, and that projects and projects through the tip 4A of the ground anchor 4 so as to be contracted and deformed by pressing the opening of the buried hole 5. Alternatively, the opening is closed by fitting so as not to protrude from the concrete surface 1B, and inserted into the filling hole 7 provided in the contracting member 6 in the buried hole 5 whose opening is closed by the contracting member 6. A hardening material 9 that is cured with time is injected and filled through the filler injection tube 8, and at least the filler injection tube 8 protruding from the contraction member 6 is removed or retracted and protrudes from the contraction member 6. The foundation work 2 or the structure 3 and the supporting pressure part 10 are disposed on the ground 1A or the concrete surface 1B through the tip 4A of the board anchor 4, and the foundation work 2 or the structure 3 is disposed. And a support fitting 11 is attached to the tip 4A of the ground anchor 4 projecting through the bearing portion 10 and the support fixture 10 is tightened, and the foundation fitting 2 or the structure 3 is attached to the ground by tightening the clamp 11. The present invention relates to a fixing method for a foundation work or a structure characterized by being pressure-bonded to 1A or a concrete surface 1B.

  The contracting member 6 is made of an elastically deformable synthetic resin material or rubber material, formed in a shape larger in diameter than the embedded hole 5, and contracted and deformed by press-fitting and fitted into the opening of the embedded hole 5. A thick cap body 6 that closes the opening of the burial hole 5 is constructed according to the foundation work or structure fixing work method according to claim 1.

  Further, according to any one of claims 1 and 2, characterized in that the surrounding member 12 surrounds the distal end portion 4A of the ground anchor 4 which is disposed through the contracting member 6 and protrudes from the contracting member 6. This relates to the described foundation work or structure fixing method.

  In addition, the surrounding member 12 penetrates the tip 4A of the ground anchor 4 protruding from the contracting member 6 and is disposed on the ground 1A or the concrete surface 1B. 4. A fixing method for a foundation or a structure according to claim 3, wherein the fixing method is set in a length not to protrude from the foundation 2 or the structure 3 or the bearing section 10 while being disposed in the pressure part 10. It is related to.

  The foundation member or structure according to any one of claims 1 to 4, wherein an air discharge hole 13 for discharging the air in the buried hole 5 to the outside is provided in the contracting member 6. This relates to the fixing method.

  Since the present invention is as described above, the foundation work or structure can be fixed to the ground or concrete surface in a crimped state, and further, by freezing and thawing, erosion due to wind and rain, or ground subsidence due to earthquake or soil softening. Even if there is a gap between the foundation work or structure and the ground or concrete surface, the foundation work or structure can be re-bonded to the ground or concrete surface due to re-tensioning of the ground anchor. Even if shaking occurs, the ground anchor is not subjected to a stress in the shearing direction. Therefore, the ground anchor can be groundbreaking foundation construction or structure fixing method capable of ensuring high safety without damaging the ground anchor.

  In addition, the present invention makes it possible to accurately measure the fixed strength (tensile force) confirmation test of the ground anchor embedded and fixed in the embedded hole, so that problems such as insufficient fixed strength can be found in advance. This is a groundbreaking foundation or structure fixing method that is safe and reliable and can prevent accidents.

  Moreover, in the present invention, when the ground anchor is buried and fixed in the buried hole, the shrinkage member is fitted into the opening of the buried hole and the hardened material is injected and filled in a state of closing the opening. The rain anchors do not flow into the buried hole even during the work, and the work is not hindered. In addition, the ground anchor is positioned and temporarily fixed by the contraction member that closes the opening of the buried hole. It is not necessary to hold the ground anchor by another means even in an unstable state until the material hardens, and it becomes an epoch-making foundation work or structure fixing method with excellent workability.

  Further, in the invention according to claim 2, for example, even when the buried hole is drilled upward on the ceiling surface or the like and the ground anchor is buried and fixed, the hardened material is easily injected densely into the buried hole. Therefore, it is an epoch-making foundation work or structure fixing method that is extremely excellent in workability and can firmly embed and fix the ground anchor upward.

  In the inventions of claims 3 and 4, when the gap between the foundation work or the structure and the ground anchor is filled with the hardening material to prevent the displacement of the foundation work, the hardening material filled in the gap is It is possible to prevent adhesion to the ground anchor. In particular, in the invention according to claim 4, it is possible to prevent the hardener from adhering to the ground anchor more reliably, and to maintain a re-tensionable state well. This is a typical foundation or structure fixing method.

  Further, in the invention described in claim 5, it is a fixing method for a foundation work or a structure excellent in workability capable of performing the filling and filling work of the hardening material into the buried hole more satisfactorily.

It is a figure which shows the cross-sectional structure after construction of Example 1 (when a foundation work is used). It is a figure which shows the cross-sectional structure after construction of Example 1 (when not using a foundation work). It is sectional drawing which shows the contraction apparatus (for the case where a foundation work is used) used for Example 1. FIG. FIG. 4 is a plan view of FIG. 3. It is sectional drawing which shows the contraction apparatus (for the case where a foundation work is not used) used for Example 1. FIG. FIG. 6 is a plan view of FIG. 5. In Example 1, it is explanatory sectional drawing which shows the state which inserted and arrange | positioned the anchor bolt which equipped the shrinkage | contraction apparatus to the embedding hole, and inject | poured and filled the hardening | curing material. In Example 1, it is explanatory sectional drawing which shows the state which injected and filled the hardening | curing material to the embedding hole, and anchored the anchor bolt. In Example 1, it is explanatory sectional drawing which shows the state which fixed the foundation work to the ground. FIG. 10 is a plan view of FIG. 9. It is a figure which shows the cross-sectional structure after construction of another example of Example 1 (when not using a foundation work and fixing a structure to a bearing part). It is a figure which shows the cross-section after construction of Example 2. FIG. It is sectional drawing which shows the contraction apparatus used for Example 2. FIG. FIG. 14 is a plan view of FIG. 13. In Example 2, it is explanatory sectional drawing which shows the state which inserted and arrange | positioned the anchor bolt which mounted | wore the embedding hole with the shrinkage | contraction apparatus. In Example 2, it is explanatory sectional drawing which shows the state which inject | pours and fills the hardening material through the filler injection pipe | tube in the embedding hole. In Example 2, it is explanatory sectional drawing which shows the state which injected and filled the hardening | curing material in the embedding hole, and anchored the anchor bolt.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  The embedded hole 5 is drilled in the ground 1A or the concrete surface 1B, and the base end 4B side of the ground anchor 4 is inserted and disposed in the embedded hole 5 and the front end 4A of the ground anchor 4 is protruded and protruded. The shrinkable member 6 that can be shrunk and deformed by pressing is fitted into the opening 5 so as not to protrude from the ground surface 1 </ b> A or the concrete surface 1 </ b> B, and the opening of the buried hole 5 is closed with the shrinkable member 6.

  At this time, the contracting member 6 may be attached to the ground anchor 4 in advance, and the ground anchor 4 to which the contracting member 6 is attached may be inserted and disposed in the embedded hole 5, and the opening of the embedded hole 5 is first contracted. The ground anchor 4 may be inserted into the embedded hole 5 through the contracting member 6 closed with the member 6 and closing the opening of the embedded hole 5.

  In any procedure, the ground anchor 4 is positioned by the contracting member 6 and is disposed in the buried hole 5 in an appropriate state.

  By providing the contraction member 6 at the opening of the buried hole 5 in this way, for example, when the hardening material 9 is filled around the tip 4A of the ground anchor 4 as in the conventional method, the hardening material around the tip 4A is filled. 9 and the hardened material 9 filled in the embedded hole 5 are not integrated, and the tension member 6 can be re-tensioned by the press deformation of the shrinkable member 6, and an elastic material is used on site as in the conventional method shown in Patent Document 1. Since it is not necessary to fill the buried hole, the working efficiency is dramatically improved.

  Subsequently, the ground anchor 4 is fixed by injecting and filling the hardened material 9 into the embedded hole 5 from the injection hole 7 provided in the contracting member 6 closing the embedded hole 5 using the filler injection pipe 8.

  In this manner, the hardened material 9 is injected and filled in the buried hole 5 with the opening of the buried hole 5 closed by the contracting member 6, so that rainwater flows into the buried hole 5 and fills even during work in rainy weather. Since there is no hindrance to the work, the work can be performed as planned regardless of the weather.

  Further, the filler injection tube 8 removes or retracts at least a portion protruding from the contracting member 6.

  Specifically, the removal / retraction of the filler injection tube 8 is performed by cutting and removing a portion protruding from the contraction member 6 after the curing material 9 is cured or before the curing material 9 is completely cured. The filler injection tube 8 protruding from the member 6 is pushed into the embedded hole 5 and retracted, or the filler injection tube 8 itself is pulled out of the contracting member 6 and retracted.

  After removing the unnecessary material on the contracting member 6 in this way, the foundation work 2 and the supporting pressure part 10 or the structure 3 and the supporting pressure part 10 of the ground anchor 4 protruding from the contracting member 6 are obtained. It arrange | positions on the ground 1A or the concrete surface 1B so that the front-end | tip part 4A may penetrate.

  As a result, the foundation work 2 or the structure 3 is disposed on the contracting member 6, and in this state, the foundation work 2 or the structure 3 is tightened or pressed with a pressing metal fitting 11 such as a nut or a wedge.

  By this tightening or pressing, the foundation work 2 or the structure 3 can be pressure-bonded to the ground 1A or the concrete surface 1B, and the ground 1A or Even if there is a gap with the concrete surface 1B, the ground anchor 4 can be re-tensioned so that the foundation work 2 and the structure 3 can be re-compressed. This is a structure or foundation fixing method using an epoch-making ground anchor that is not subjected to stress in the direction and therefore can ensure high safety without damaging the ground anchor 4.

  A first embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, as shown in FIGS. 1 and 2, a foundation work 2 for fixing the structure 3 to the ground 1A using the ground anchor 4 or a structure 3 for fixing the structure 3 to the concrete surface 1B is fixed. Or it is a fixing method of a structure.

  Specifically, the base end 4B side of the ground anchor 4 is inserted and disposed in the buried hole 5 drilled in the ground 1A or the concrete surface 1B, and the distal end 4A of the ground anchor 4 is projected through and buried. 5, a shrinkable member 6, which can be shrunk and deformed by pressing, is fitted so as not to protrude from the surface of the ground 1 </ b> A or the concrete surface 1 </ b> B, and the opening of the buried hole 5 is closed with this shrinkable member 6. A hardened material 9 that is cured with time is injected and filled into a buried hole 5 whose opening is closed by a member 6 through a filler injection tube 8 inserted in an injection hole 7 provided in the shrinkable member 6, and at least protrudes from the shrinkable member 6. The filler injection pipe 8 is removed or retracted, and the tip portion 4A of the ground anchor 4 protruding from the contracting member 6 is passed through so that the foundation work 2 or the structure 3 and the bearing portion 10 are placed on the ground 1A or the concrete surface 1B. Arranged in At the same time, a presser fitting 11 is attached to the tip 4A of the ground anchor 4 that protrudes through the foundation 2 or the structure 3 and the bearing part 10, and the presser 11 is tightened to fix the foundation 2 or This is a foundation work or structure fixing method for pressure-bonding the structure 3 to the ground 1A or the concrete surface 1B.

  In this embodiment, an anchor bolt 4 having a bolt portion 4A formed at the tip portion 4A is used as the ground anchor 4.

  In this embodiment, as the contracting member 6, a contracting device 14 including the contracting member 6 and an anchor surrounding member 12 that surrounds the anchor bolt 4 penetrating and projecting from the contracting member 6 is used.

  As shown in FIGS. 3 to 6, the contracting device 14 includes a contracting member 6, an encircling member 12, and a filler injection pipe 8. The enveloping member 12 is erected on the contracting member 6. A shrinkage device 14 shown in FIGS. 3 and 4 is used when fixing the foundation work 2, and the shrinkage device 14 shown in FIGS. Is used when the structure 3 is fixed without using the foundation work 2, and has a specification in which the diameter and height of the surrounding member 12 are different.

  The components of the contracting device 14 will be described in detail. The contracting member 6 is made of an elastically deformable synthetic resin material or rubber material (for example, a sponge material or a foam material), and has a diameter larger than that of the embedded hole 5. It is formed into a shape, formed into a thick cap body 6 having a circular shape in plan view, which is contracted and deformed by press-fitting and inserted into the embedded hole 5 and closes the opening of the embedded hole 5. The anchor through-hole 15 is provided, and the injection hole 7 for injecting and filling the hardening material 9 into the embedded hole 5 whose opening is closed by the contracting member 6 is provided.

  In addition, the surrounding member 12 is formed of a tubular member (specifically, a metal pipe material in the present embodiment) in which the anchor bolt 4 inserted and disposed in the surrounding member 12 is movable, The surrounding member 12 is a structure disposed in the through-hole 2A of the foundation work 2 disposed on the ground 1A through the bolt portion 4A of the anchor bolt 4 protruding from the contracting member 6, or on the concrete surface 1B. 3 in the through-hole 3A, or in the through-hole 10A of the bearing section 10 disposed on the concrete surface 1B, and the length that does not protrude from the foundation work 2, the structure 3 or the bearing section 10 The length is set to be substantially the same in this embodiment.

  The filler injection tube 8 may be formed in a pipe shape that can be inserted into the injection hole 7 provided in the contraction member 6, and may be inserted into the contraction member 6 in advance and integrally formed. May be inserted into the contracting member 6 at the time of injection filling.

  In addition, the shrinkage device 14 is set to a size that is easy to carry, with a height of approximately 50 cm or less, a diameter of 100 mm or less, and a weight of 500 g or less, depending on the size (thickness) of the foundation work 2 and structure 3 to be fixed. It is configured.

  Below, the construction procedure in the case of fixing the foundation work 2 to the ground 1A using the contracting device 14 and the anchor bolt 4 configured as described above will be described.

  First, the buried hole 5 is drilled in the ground 1A.

  At this time, the opening diameter of the opening of the embedded hole 5 is smaller than that of the contracting member 6, and the contracting member 6 is drilled so as to be press-fit.

  Next, an anchor bolt equipped with a contracting device 14 is inserted into the buried hole 5.

  Specifically, as shown in FIG. 7, the base end 4B side of the anchor bolt 4 below the contracting device 14 is inserted into the embedded hole 5 and the contracting member 6 of the contracting device 14 is inserted into the embedded hole. 5 is fitted so as not to protrude from the surface of the ground 1A, and the opening of the buried hole 5 is closed.

  By not allowing the contraction member 6 to protrude from the ground 1A in this way, when the foundation work 2 is disposed on the ground 1A, no gap is generated between the foundation work 2 and the ground 1A, and the foundation work 2 is removed from the ground 1A. Therefore, the anchor bolt 4 is not subjected to shearing stress even when rolling occurs due to an earthquake or the like, and damage to the anchor bolt 4 can be prevented.

  Since the contracting member 6 is press-fitted into the opening of the embedded hole 5, the anchor bolt 4 penetrating the contracting member 6 (contracting device 14) is not easily detached from the embedded hole 5. In addition, the anchor bolt 4 is temporarily fixed in a state where the anchor bolt 4 is positioned at the center of the buried hole 5 by the contracting device 14 (contracting member 6).

  Furthermore, if a space (gap) is created between the peripheral surface of the anchor bolt 4 and the inner surface of the surrounding member 12 when the shrinkage device 14 is attached to the anchor bolt 4, this space (gap) is filled with grease or foam material. Then, the gap may be filled, thereby preventing rainwater or the like from accumulating in the space (gap).

  Next, in order to permanently fix the anchor bolt 4 which is positioned and temporarily fixed at the center of the buried hole 5, a hardening material 9 is injected and filled into the buried hole 5.

  Specifically, as shown in FIGS. 7 and 8, a curing material 9 that is cured with time is injected and filled from a filler injection tube 8 that is inserted and disposed in an injection hole 7 provided in the contracting member 6. Curing until hardened (about 2 weeks).

  In addition, when the hardening material 9 is injected and filled in the shrinkable member 6 that closes the embedded hole 5 through the filler injection pipe 8 into the embedded hole 5, the air discharge hole that can discharge the air in the embedded hole 5 to the outside. 13 may be provided so that the hardener 9 can be injected and filled more smoothly. Also, by providing this air discharge hole 13, when cement mortar or the like is used as the hardener 9, In addition to discharging air, it is also possible to discharge moisture generated by breathing during the curing period.

  When the hardening material 9 is hardened and the anchor bolt 4 is buried and fixed, the filler injection pipe 8 protruding from the contracting member 6 is removed.

  In this embodiment, after the curing material 9 is completely cured, the portion protruding from the shrinkable member 6 of the filler injection tube 8 is cut and removed. For example, before the curing material 9 is completely cured, the filling is performed. The filler injection tube 8 protruding from the contracting member 6 may be retracted and removed by pushing the material injection tube 8 into the buried hole 5 or pulling it out.

  After removing the filler injection tube 8, the foundation work 2 is disposed on the ground 1A.

  Specifically, as shown in FIGS. 9 and 10, the foundation work 2 is disposed on the ground 1 </ b> A so that the surrounding member 12 of the contraction device 14 is inserted into the through hole 2 </ b> A provided in the foundation work 2. The space formed between the inner surface of the through hole 2A of the foundation work 2 disposed on the ground 1A and the surrounding surface of the surrounding member 12 of the shrinkage device 14 is filled with the hardener 9 and then penetrates the surrounding member 12 to pass the foundation work. 2 is attached to the bolt part 4A of the anchor bolt 4 protruding from 2 and a nut 11 as a holding metal fitting 11 is attached, and the nut 11 is tightened and the foundation work 2 is crimped to the ground 1A. Let

  Further, when the structure 3 is fixed on the concrete surface 1B, it can be fixed by the same fixing method as described above. However, as shown in FIG. The present embodiment can also be used for a fixing method in which the structure 3 is attached to the bearing section 10 fixed to the concrete surface 1B without arranging the structure 3.

  In this embodiment, the shrinkage device 14 integrally molded in advance is attached to the anchor bolt 4 and the anchor bolt 4 to which the shrinkage device 14 is attached is inserted and disposed in the buried hole 5. It is also possible to use the contact receiving portion 6, the surrounding member 12, and the filler injection tube 8 that are configured individually.

  By using the fixing method of the present embodiment as described above, the foundation work 2 or the structure 3 can be fixed to the ground 1A or the concrete surface 1B in a crimped state, and further, erosion due to freezing and thawing or wind and rain, or Even if there is a gap between the foundation work 2 or structure 3 and the ground 1A or concrete surface 1B due to ground subsidence due to earthquake or softening of the soil, the foundation work 2 or structure 3 is re-established by re-tensioning of the anchor bolt 4 Can be crimped.

  In addition, in this embodiment, an accurate value can be measured in a confirmation test of the fixing strength (tensile force) of the anchor bolt 4 embedded and fixed in the embedded hole 5. And can prevent accidents from occurring.

  Moreover, in this embodiment, when the anchor bolt 4 is embedded and fixed in the embedded hole 5, the hardening material 9 is injected and filled in a state where the opening of the embedded hole 5 is closed by the contracting member 6 of the contracting device 14. In the rainy weather, rainwater or the like does not flow into the buried hole 5 so that the work is not hindered. Further, the anchor bolt 4 is fixed by the contracting member 6 that closes the opening of the buried hole 5. Since it is positioned and temporarily fixed, it is not necessary to hold the anchor bolt 4 by another means even in an unstable state until the hardened material 9 is hardened.

  As described above, the present embodiment allows the anchor bolt 4 to be re-tensioned, can perform the work without being influenced by the weather, and is excellent in workability with reduced man-hours on site. This is a typical foundation or structure fixing method.

  A second embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, as shown in FIG. 12, the structure 3 is fixed (suspended) on an upward concrete surface 1B such as a ceiling surface.

  In the present embodiment, as in the first embodiment, the case where the anchor bolt 4 is used as the ground anchor 4 and the contracting device 14 is used as the contracting member 6 will be described.

  The contracting device 14 used in this embodiment is composed of a contracting member 6 and an anchor surrounding member 12 surrounding the anchor bolt 4 penetrating and projecting from the contracting member 6 as in the first embodiment. 13 and 14, the shrink member 6, the surrounding member 12, the filler injection pipe 8, and the air discharge pipe 16 are provided. The surrounding member 12 is erected on the shrink member 6, and the shrink member 6 has a structure in which a filler injection pipe 8 and an air discharge pipe 16 are disposed through.

  The components of the contracting device 14 according to the present embodiment will be described in detail. The contracting member 6 is made of an elastically deformable synthetic resin material or rubber material (for example, a sponge material or a foam material). It is formed into a large-diameter shape, and is formed into a thick-walled cap body 6 having a circular shape in plan view that is contracted and deformed by press-fitting and fitted into the embedded hole 5 to close the opening of the embedded hole 5. An anchor through hole 15 for penetrating the anchor bolt 4, an injection hole 7 for injecting and filling the hardening material 9 into the embedded hole 5 whose opening is closed by the contracting member 6, and the hardening material from the injection hole 7 When 9 is injected and filled, an air discharge hole 13 for discharging the air in the embedded hole 5 to the outside is provided.

  In addition, the surrounding member 12 is formed of a tubular member (specifically, a metal pipe material in the present embodiment) in which the anchor bolt 4 inserted and disposed in the surrounding member 12 is movable, The surrounding member 12 is inserted into the through hole 3A of the structure 3 disposed on the concrete surface 1B through the bolt portion 4A of the anchor bolt 4 protruding from the contracting member 6, or the support member disposed on the concrete surface 1B. The pressure portion 10 is disposed in the through hole 10A, and is set to a length that does not protrude from the structure 3 or the pressure support portion 10 (in the present embodiment, a length that is substantially flush).

  The filler injection tube 8 may be formed in a pipe shape that can be inserted into the injection hole 7 provided in the contraction member 6, and may be inserted into the contraction member 6 in advance and integrally formed. May be inserted into the contracting member 6 at the time of injection filling.

  The air discharge pipe 16 is formed in a pipe shape that can be inserted into the air discharge hole 13 provided in the contact receiving portion 6, and a bent portion 16A is formed in the middle of the length direction. The portion 16A is provided so that the hardened material 9 injected and filled in the buried hole 5 does not easily flow back through the air discharge pipe 16.

  The present embodiment is a fixing method for fixing the structure 3 to the upward concrete surface 1B using the shrinkage device 14 and the anchor bolt 4 configured as described above, and the construction procedure will be described below.

  First, the embedded hole 5 is drilled in the upward concrete surface 1B.

  At this time, the diameter of the opening of the embedded hole 5 is made smaller than the diameter of the contracting member 6 of the contracting device 14, and the contracting member 6 is drilled so that it can be press-fitted.

  Next, an anchor bolt equipped with a contracting device 14 is inserted into the buried hole 5.

  Specifically, as shown in FIG. 15, the base end 4B side of the anchor bolt 4 below the contracting device 14 is inserted into the embedded hole 5 and the contracting member 6 of the contracting device 14 is inserted into the embedded hole 5. The opening of the buried hole 5 is closed by fitting so as not to protrude from the concrete surface 1B.

  At this time, since the contracting member 6 is press-fitted into the opening of the embedded hole 5, the anchor bolt 4 penetrating through the contracting member 6 (contracting device 14) is not easily detached from the embedded hole 5. In addition, the anchor bolt 4 is temporarily fixed in a state where it is positioned at the center of the buried hole 5 by the contracting device 14 (the contracting member 6).

  Next, as shown in FIG. 16, a hardener 9 is injected and filled into the embedded hole 5 in order to permanently fix the anchor bolt 4 that is positioned and temporarily fixed at the center of the embedded hole 5.

  Specifically, a hardening material 9 that is cured with time is injected and filled from a filler injection tube 8 that is inserted into an injection hole 7 provided in the contracting member 6.

  When the hardening material 9 is filled and injected from the injection hole 7 into the buried hole 5 using the filler injection pipe 8, the air in the buried hole 5 is discharged from the air discharge pipe 16 inserted and disposed in the air discharge hole 13. Compared with the configuration without the air discharge pipe 16, the filling and filling operation of the curing material 9 can be performed smoothly.

  Further, as shown in FIG. 17, in this embodiment, the length of the side of the air exhaust pipe 16 to be inserted and disposed in the buried hole 5 is set to a length that reaches the vicinity of the upper end of the buried hole 5. When the hardened material 9 injected and filled into the hole 5 reaches the upper end of the buried hole 5, the hardened material 9 injected and filled through the air discharge pipe 16 flows out. It can be determined that the inside of the hardener 9 has been filled, and at the timing of the outflow of the hardener 9 from the air discharge pipe 16, the filling and filling operation of the hardener 9 into the buried hole 5 is completed. Curing is performed until the cured material 9 is cured (about two weeks).

  When the filling and filling operation of the hardening material 9 is completed, the filling material injection pipe 8 and the air discharge pipe 16 hanging downward from the contracting member 6 are bent so that the hardening material 9 filled in the embedded hole 5 does not flow out. To.

  When the hardening material 9 is hardened and the anchor bolt 4 is buried and fixed, the filler injection pipe 8 protruding from the contracting member 6 is removed.

  In this embodiment, after the curing material 9 is completely cured, the portion protruding from the contracting member 6 of the filler injection tube 8 is cut and removed.

  After removing the filler injection tube 8, the structure 3 is fixed to the concrete surface 1B.

  Specifically, as shown in FIG. 12, the structure 3 is disposed on the concrete surface 1B so that the surrounding member 12 of the shrinkage device 14 is inserted into the through hole 3A provided in the structure 3, and the surrounding member Attach a washer 10 as a bearing part 10 to a bolt part 4A of an anchor bolt 4 that penetrates 12 and protrudes from a structure 3, and attaches a nut 11 as a presser fitting 11, and tightens this nut 11 to the structure. 3 is pressed against the concrete surface 1B.

  The rest is the same as in Example 1.

  Note that the present invention is not limited to the first and second embodiments, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1A Ground 1B Concrete surface 2 Foundation work 3 Structure 4 Ground anchor 4A Tip part 4B Base end part 5 Embedded hole 6 Shrinkage member 7 Injection hole 8 Filler injection pipe 9 Hardening material
10 Bearing section
11 Presser bracket
12 Enclosing member
13 Air exhaust hole

Claims (5)

  A foundation or structure fixing method that fixes a foundation work or structure to the ground or concrete surface using a ground anchor, and the base end side of the ground anchor is inserted into a buried hole drilled in the ground or concrete surface. The opening of the ground anchor is fitted so that it does not protrude from the ground surface or the concrete surface, and the tip of the ground anchor penetrates and protrudes, and the opening of the buried hole can be shrunk and deformed by pressing. The filling material, which is hardened with time through a filling material injection tube inserted into the injection hole provided in the contraction member, is injected and filled into the buried hole whose opening is closed with the contraction member, and at least from the contraction member The protruding filler filling pipe is removed or retracted, the tip of the ground anchor protruding from the contracting member is penetrated, and the foundation work or the structure and the supporting pressure part In addition, the presser fitting is attached to the tip of the ground anchor which is disposed on the ground or the concrete surface and protrudes through the foundation work or structure and the bearing part. A fixing method for a foundation work or a structure, wherein the foundation work or the structure is crimped to the ground or a concrete surface.   The contraction member is made of an elastically deformable synthetic resin material or rubber material, formed in a shape larger in diameter than the embedded hole, and contracted and deformed by press-fitting and fitted into the opening of the embedded hole. 2. A fixing method for a foundation or structure according to claim 1, wherein the fixing method is a thick cap that closes the opening.   The foundation work or the structure according to any one of claims 1 and 2, wherein a surrounding member is used to surround a tip end portion of the ground anchor projecting from the contracting member and projecting from the contracting member. Fixing method.   The surrounding member is disposed in the foundation work, the structure, or the bearing section disposed on the ground or the concrete surface through the tip of the ground anchor protruding from the contracting member, 4. The foundation work or structure fixing method according to claim 3, wherein the length is set so as not to protrude from the foundation work or the structure or the bearing section.   5. The fixing method for a foundation work or a structure according to claim 1, wherein an air discharge hole for discharging the air in the embedded hole to the outside is provided in the contraction member.

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