JP7197264B2 - Anchor element fixation capsule and anchor element fixation method using the same - Google Patents

Description

The present invention relates to an anchor element fixing capsule and an anchor element fixing method using the same for fixing an anchor element used for reinforcement work of a concrete frame or ground or attachment of a workpiece to a concrete frame.

In order to increase the seismic strength and durability of existing concrete man-made structures such as culverts, dam bodies, tunnels, and buildings, as well as the ground such as bedrock and natural cliffs, reinforcement work is carried out to improve shear strength. ing. In addition, work is being carried out to attach structures such as signboards, fences, handrails, and decorative panels to concrete man-made structures as required.

In this reinforcement work, a cylindrical hole is formed in the concrete frame and ground that form the concrete structure with a rotating tool such as a drill or a core boring machine, and an anchor element fixing agent that is a curable composition is used. An elongated anchor element fixing capsule formed from a bag containing the capsule is inserted, and an anchor element such as a reinforcing bar or an anchor bolt is driven into the capsule while being hit and rotated by a vibrating drill to be fixed. It is. Such construction is called a post-construction anchor construction method. By driving the anchor element and breaking the bag, the anchor element fixing agent is filled in the gap between the anchor element and the inner wall surface of the drilled hole, and then hardens. As a result, the anchor element is fixed to the concrete frame, bedrock, or the like, and the shear strength of the existing concrete structure can be increased, or a workpiece can be attached thereto.

As such an anchor element fixing capsule, Patent Document 1 discloses an anchor element fixing capsule containing an anchor element fixing agent in a resin bag closed by heat-sealing the ends of a resin film. The bag used in this resin capsule for anchor element fixing is a strong resin film, and the anchor element fixing agent does not leak from the bag during transportation, so that it is easy to handle. When a curable composition such as dry mortar that hardens upon contact with water is used as the anchor element fixing agent, the anchor element fixing agent can be applied to the anchor element fixing agent by immersing the anchor element fixing capsule in water stored in a container such as a tray. Since the bag absorbs water, a bag made of a resin film that is difficult to permeate water is not suitable for this purpose. In addition, since the bag is hard to break when the anchor elements are driven into the bag and the anchor element has a high resistance to driving, an excessive burden is imposed on the operator. Furthermore, fragments of the resin film bag are mixed in with the anchor element fixing agent, making the cured anchor element fixing agent brittle and lowering the fixing force of the anchor elements.

On the other hand, there is known an anchor element fixing capsule containing an anchor element fixing agent in a bag made of fiber cloth. Such a conventional anchor element fixing capsule is, for example, as shown in FIG. The fiber cloth 91 has a tubular portion 91b and an overlapped portion 91c (Fig. (a)). Furthermore, the thread 92 that sews the boundary between the cylindrical portion 91b and the overlapped portion 91c in a straight line, the overlapped portion 91d that is wound a plurality of times at the upper and lower ends of the fiber cloth 91, and the overlapped portion 91d are unwound. A bag body 94 is formed by the metal stapler 93 that is fastened (Fig. 1(b)). The bag body 94 contains a hydraulic anchor element fixing agent 95 . A method of overlapping the inner surfaces 91a to form the overlapping portion 91c is called joining hands, and the overlapping portion 91c is formed so as to protrude from the cylindrical portion 91b.

The fiber cloth 91 used for the bag body 94 of the conventional anchoring element fixing capsule 90 is permeable to water and thus suitable for containing the hydraulic anchoring element fixing agent. However, there are a flat cylindrical portion 61b having a distorted cross section due to being pulled by the thread 92, an overlapping portion 91c projecting outward from the cylindrical portion 61b, and an angular overlapping portion 91d. Also, since it interferes with the opening of the drilled hole and the inner wall surface, the conventional anchor element fixing capsule 90 cannot be smoothly inserted into the cylindrical drilled hole, resulting in reduced workability.

Also, when the bag 94 is crushed by the anchor element driven into the drilled hole, stress is concentrated on the portion sewn together by the thread 92, and the bag 94 is torn only at the boundary of the overlapping portion 91c along this. Furthermore, the overlapped portion 91c blocks the flow of the anchor element fixing agent that has flowed out of the bag body 94. As shown in FIG. As a result, the gap between the anchor element and the inner wall surface of the drilled hole is not uniformly filled with the anchor element fixing agent, resulting in a decrease in the fixing force of the anchor element. Furthermore, if the metal stapler 93 containing nickel or copper, which is a metal that is more difficult to oxidize than iron, which is the raw material of the anchor element, remains in the hardened anchor element fixing agent, the anchor element may be electrolytically corroded. Since it causes some electrolytic corrosion, the shear strength of concrete structures and bedrock cannot be maintained for a long period of time.

JP-A-11-117700

The present invention has been made in order to solve the above-mentioned problems. In addition to reducing the impact resistance of the anchor element, and having a container that dissolves upon contact with water, it does not generate broken pieces of the container due to impaction of the anchor element, and the anchor element fixation is a curable composition. Anchor element anchoring capsule that can obtain high anchor element anchoring force by uniformly filling drilled holes, and can maintain the shear strength of concrete structures and bedrock for a long period of time by not having a metal stapler. , and an anchor element fixing method using the same.

The anchor element fixing capsule of the present invention, which has been made to achieve the above object, comprises a rectangular water- soluble resin sheet having a basis weight or basis weight of 10 to 50 g/m ² . A curable composition that cures a cylindrical container having a cylindrical body joined by overlapping envelope pasting and both end closed parts narrowed and joined on the short side of the tubular container when it comes into contact with water. It is something that is tense by enclosing it while stuffing things.

It is preferable that the anchor element fixing capsule is joined by overlapping, sticking or fusing the joining portion on each of the front and back sides.

In the anchor element fixing capsule, at least one of the both end closing portions may be folded back and fusion-bonded.

In the anchor element fixing capsule, it is preferable that the cylindrical container has a long grain along the long side of the water-soluble resin sheet and a horizontal grain crossing the long side.

In the anchor element fixing capsule, for example, the tensile strength of the water-soluble resin sheet is 6 to 30 N/15 mm in the long grain direction and 2 to 15 N/15 mm in the long grain direction, and the long grain is 2 to 15 N/15 mm. It is said to have higher tensile strength than the cross grain .

The anchoring element anchoring capsule may have a length of 50-700 mm and a diameter of 8-50 mm when said tubular container is taut.

The anchor element fixing capsule preferably has a width of 2 to 5 mm at the joint portion.

In the anchor element fixing capsule, a plurality of the water-soluble resin sheets are overlapped and joined at the joint portions on each of the front and back sides, so that the cylindrical container has a plurality of the joint portions. preferably.

In the anchor element fixing capsule, the water-permeable non-woven sheet may be resin impregnated paper and/or resin fiber blended paper.

The anchoring element anchoring capsule is characterized in that the tubular container has the joint region with a weakened portion, the joint edge thereof, and/or the wales along the long sides of the water-permeable nonwoven sheet. is preferred.

In the anchor element fixing method of the present invention, the inside of the anchor element fixing capsule described above is immersed in the water, and the water that permeates the water-soluble resin sheet is brought into contact with the curable composition. The anchor element fixing capsule is inserted into a drilled hole in the ground and/or bedrock, and the anchor element is inserted into the drilled hole while piercing the anchor element to cure the curable composition.

In the anchor element fixing method of the present invention, the anchor element fixing capsule described above is placed in a cylinder cartridge having a cylinder tip at its distal end and an opening at its proximal end, and then the water is introduced through the opening to form the water-soluble resin sheet. is melted, a lid that moves toward the tip of the cylinder cartridge in response to pressure is inserted from the opening, and the lid is pressed to push out the curable composition from the tip of the cylinder, thereby forming concrete, ground and/or injection into a drilled hole in the rock mass, inserting an anchor element into the drilled hole and penetrating the hardenable composition to harden the hardenable composition.

In the anchor element fixing capsule of the present invention, since the sheet forming the cylindrical container has a basis weight or basis weight of 10 to 50 g/m ² , handling during storage, transportation, and drilling and insertion is easy. It is possible to achieve both a good moderate strength and a reduction in the driving resistance of the reinforcing steel bar. Further, when the cylindrical container is formed of a water-permeable nonwoven sheet, the pieces of the nonwoven sheet crushed by the anchoring elements do not impair the robustness of the hardened anchoring element fixing agent, so that a high anchoring element fixing force can be obtained. Obtainable.

The anchor element fixing capsule has a joint portion formed by laminating the front and back sides of the cylindrical container along the long side of the rectangular non-woven sheet to each other. The cylindrical container is torn along the joint edge of the site, and the anchor element fixing agent is evenly filled between the anchor element and the inner wall surface of the drilled hole, so that the pull-out strength of the anchor element can be greatly improved. .

The anchor element anchoring capsule does not require a metallic stapler when the closed portions at both ends are heat-sealed, so that it does not cause electrolytic corrosion of the anchor element after installation.

In the anchor element fixing capsule, if the non-woven sheet has longitudinal grains along the joining portion and transverse grains intersecting with the longitudinal grains and having a stronger tensile strength than the longitudinal grains, the tubular container is held when the anchor elements are driven. Since it tears at multiple locations along the longitudinal grain, it is possible to further reduce the driving resistance, and the anchor element fixing agent, which is a curable composition, can be quickly, reliably, and more uniformly bonded to the anchor element and the inner wall surface of the drilled hole. can be filled in the gap of

In the anchor element fixing method of the present invention, since the anchor element fixing capsule is stuffed with a curable composition such as an anchor element fixing agent and enclosed, the outer shape can be maintained even if the capsule is tilted or stood vertically. The anchor element can be fixed by smoothly inserting it into a drilled hole in any of the floor surface, wall surface, and ceiling of the concrete frame.

In the anchor element fixation method, if the cylindrical container is made of a water-soluble resin sheet, the anchor element fixation capsule is placed in the cylinder cartridge, and then the required amount of water is simply added to dissolve the cylindrical container. Since the curable composition can be brought into contact with the required amount of water, accurate application can be performed easily. Moreover, since the water-soluble resin sheet is dissolved, there is no reduction in anchoring force of the anchor element due to fragments of the cylindrical container.

1 is a perspective view showing one form of an anchor element fixing capsule to which the present invention is applied; FIG. FIG. 4 is a perspective view showing an anchor element fixing capsule to which the present invention is applied during manufacturing. 1 is a schematic partial cross-sectional view showing one embodiment of an anchor element fixing method to which the present invention is applied; FIG. FIG. 11 is a perspective view showing another anchoring element fixing capsule to which the present invention is applied, in the middle of manufacturing; FIG. 11 is a perspective view showing another anchoring element fixing capsule to which the present invention is applied, in the middle of manufacturing; FIG. 4 is a perspective view showing another form of anchor element fixing capsule to which the present invention is applied; FIG. 10 is a perspective view for explaining the first half of the anchor element fixing method for another anchor element fixing capsule to which the present invention is applied; FIG. 11 is a perspective view for explaining the second half of the anchor element fixing method for another anchor element fixing capsule to which the present invention is applied; Fig. 10 is a photograph showing the results of a behavior confirmation test when an anchor muscle is driven using an anchor element fixing capsule to which the present invention is applied and an anchor element fixing capsule to which the present invention is not applied. FIG. 3 is a perspective view showing a conventional anchor element fixing capsule to which the present invention is not applied and its manufacturing process.

Modes for carrying out the present invention will be described in detail below, but the scope of the present invention is not limited to these modes.

A perspective view of one embodiment of the anchoring element anchoring capsule of the present invention is shown in FIG. The anchor element fixing capsule 1 has a cylindrical container 10 and an anchor element fixing agent 20 enclosed therein. The anchor element fixing agent 20 is, for example, dry mortar that is not kneaded with water. The anchor element fixing agent 20 changes into a fluid fixing agent paste 20a by absorbing water, and then hardens to form a hardened body 20b (see FIGS. 3(c) and 3(d)). The anchor element fixing capsule 1 has a cylindrical body portion 11 having an elongated cylindrical shape, and an upper end portion 12 and a lower end portion 13 narrowed at both ends thereof.

The cylindrical container 10 is formed of a rectangular water-permeable nonwoven sheet 10a having long sides and short sides, which is a blended sheet of nonwoven fiber paper and resin fiber. Along the long side of the water _- permeable nonwoven sheet 10a, the edges of the outer surface 10a1, which is the surface of the water _- permeable nonwoven sheet 10a, and the inner surface 10a2, which is the back surface, are mutually aligned along the long side of the water-permeable nonwoven sheet 10a (Fig. 2(a)). )) are bonded together by thermal fusion. The tubular container 10 thereby has a joint portion 14 . Such a pasting method is called envelope pasting. The joining portion 14 has joining edges 14a at both edges thereof due to the application of the envelope attachment.

The water-permeable non-woven sheet 10a forming the cylindrical container 10 is an assembly of countless fibers that are intricately overlapped with each other, and there are gaps between the fibers that allow a liquid such as water to pass through. The basis weight or basis weight of the water-permeable nonwoven sheet 10a is preferably 10 to 50 g/m ² , more preferably 15 to 40 g/m ² , and even more preferably 18 to 30 g/m ² . Preferably, 18 g/m ² is even more preferred. By setting the basis weight of the water-permeable non-woven sheet 10a within this range, the anchor element fixing capsule 1 can be provided with adequate strength and friability sufficient for handling by hand. Water can be absorbed, permeated, or permeated through the water-permeable nonwoven sheet 10a.

The density of the water-permeable nonwoven sheet 10a is preferably 0.15-0.45 g/cm ³ , more preferably 0.20-0.40 g/cm ³ , and more preferably 0.25-0.35 g/cm 3 . /cm ³ is even more preferred. If the density of the water-permeable nonwoven sheet 10a is less than the above lower limit, the strength of the cylindrical container 10 will be insufficient, and the anchor elements will not be fixed when the anchor element fixing agent 20 is filled (see FIG. 2(d)). The cylindrical container 10 is damaged during transportation and handling of the capsule 1 . On the other hand, if the density exceeds the above upper limit, the water permeability of the cylindrical container 10 is insufficient, and it takes a long time for the anchor element fixing agent 20 to completely absorb water, or the water cannot be absorbed. do.

As a result, the workability of the anchor element fixing capsule 1 during storage, transportation, and insertion into a hole is improved, and the driving resistance of the anchor element is reduced. In addition, since water is highly permeable to water, it is possible to allow water to permeate the anchor element fixing agent 20 in a short period of time. Furthermore, after the fixing agent paste 20a permeates the water-permeable non-woven sheet 10a crushed by the anchoring elements, it hardens together with it. A high anchor element fixing force can be obtained without impairing the toughness of the cured body 20b of the fixing agent paste 20a thus generated.

An upper end closing portion 12a and a lower end closing portion 13a of the upper end portion 12 and the lower end portion 13 of the anchor element fixing capsule 1 protrude in the extending direction of the central axis of the cylindrical body portion 11, respectively. The both-end closing portions 12a, 13a are joined by folding the water-permeable nonwoven sheet 10a at both ends 12, 13, which are the short sides, by folding the sheet 10a several times, and then by heat-sealing. Therefore, the anchor element fixing capsule 1 does not require a metallic stapler. Due to this folding, the both-end closing portions 12a and 13 are formed into a substantially rectangular shape, respectively, so that the anchor element fixing agent 20 does not leak from the tubular container 10 until use.

The width W of the both end blocking portions 12a, 13a is smaller than the diameter D of the anchor element fixing capsule 1, and the both end blocking portions 12a, 13a do not protrude in the direction of the diameter D. The width W is not particularly limited as long as it is smaller than the diameter D, but the width W:diameter D is preferably 0.8 to 0.99:1, more preferably 0.9 to 0.95:1. preferable. If the ratio of the width W to the diameter D is within this range, the opening of the drilled hole 32 drilled in the concrete frame 31 (Fig. 3(b)), and because they do not contact or get caught, the cylindrical container 10 is not damaged unexpectedly. As a result, the anchor element fixing agent 20 does not leak from the cylindrical container 10 whose strength has been reduced by being immersed in water before the anchor element is inserted.

The upper end portion 12 has an upper end curved portion 12b that is contiguous to the upper end closed portion 12a and narrows in a dome shape while forming a gently curved surface toward the upper end closed portion 12a. The upper end curved portion 12b is curved over its entire circumference. Similarly, the lower end portion 13 also has a dome-shaped lower curved portion 13b that is continuous with the lower end closed portion 13a and narrows toward the closed portion 13a.

The anchoring element fixing agent 20 is tightly packed in the cylindrical container 10 by folding back the both end closing portions 12a and 13a so as to wind toward the cylindrical body portion 11, respectively. there is As a result, the pressure from the anchoring element fixing agent 20 is evenly applied to the cylindrical container 10, and the cylindrical body 11 and both curved portions 12b and 13b are kept in tension without loosening due to the stress caused by this pressure. The inner side surfaces 10b2 of the cylindrical body portion 11 and _both curved portions 12b and 13b are in close contact with the particles of the anchor element fixing agent 20. As shown in FIG. As a result, the anchor element fixing capsule 1 has a cylindrical shape with a circular cross section between the upper end portion 12 and the lower end portion 13, unlike a bag body formed by so-called joining hands. Furthermore, since the tightly packed anchor element fixing agent 20 does not flow inside the cylindrical container 10 due to the close contact between the cement particles and fine aggregates contained in the dry mortar, the anchor element fixing capsule 1 is tilted, The outer shape of the anchor element fixing capsule 1 does not change even if it is set vertically or placed horizontally.

The lower limit of the filling rate of the anchor element fixing agent 20 in the cylindrical container 10 is preferably 90%, more preferably 95%, and even more preferably 99%. The upper limit of the filling rate is preferably 100%. When the filling rate is within this range, it is possible to suppress the flow of the anchor element fixing agent 20 inside the cylindrical container 10 . The filling rate is the volume ratio of the anchor element fixing agent 20 to the inner space of the cylindrical container 10 when the anchor element fixing agent 20 is packed in the cylindrical container 10 .

As described above, the anchor element fixing capsule 1 has excellent shape retention properties, such that it can maintain a cylindrical shape with narrowed ends 12 and 13 regardless of its orientation, so that it can be opened on any floor surface, wall surface, or ceiling. Even a drilled hole can be smoothly inserted into a cylindrical drilled hole. Furthermore, since the joining portion 14 does not protrude from the surface of the cylindrical container 10, and the both ends 12 and 13 have both curved portions 12b and 13b that narrow toward the both closed portions 12a and 13a, respectively. , the anchor element fixing capsule 1 can be inserted without interfering with the bore hole. Moreover, since both ends 12 and 13 have the same shape, the operator can insert the anchor element fixing capsule 1 into the drilled hole from any direction. In this way, the anchor element fixing capsule 1 improves the workability during drilling and insertion. The construction time can be shortened and the burden on workers can be reduced.

The water-permeable non-woven sheet 10a has longitudinal stitches 15 along the joining portions 14 substantially parallel to its long sides, and crosswise stitches 16 intersecting the longitudinal stitches 15 . It is preferable that the water-permeable nonwoven sheet 10a has a higher tensile strength in the 15-long grain direction than in the 16-long grain direction. Specifically, the tensile strength in the direction of 15 longitudinal grains is preferably 6 to 30 N/15 mm, more preferably 8 to 15 N/15 mm. The tensile strength in the cross grain 16 direction is preferably 2 to 15 N/15 mm, more preferably 4 to 10 N/15 mm.

As described above, since the long grains 15 of the water-permeable non-woven sheet 10a have a higher tensile strength than the long grains 16, the weight of the anchor element fixing agent 20 is particularly likely to be concentrated, and the curved portions 12b and 13b at both ends are likely to be concentrated. can give sufficient strength to As a result, even if the anchor element fixing capsule 1 accidentally drops on the floor or the ground during handling, the cylindrical container 10 will not be damaged and the anchor element fixing agent 20 will not leak. Furthermore, since the water-permeable non-woven sheet 10a has such vertical grains 15 and horizontal grains 16, the cylindrical container 10 of the anchor element-fixing capsule 1 inserted into the drilled hole has vertical grains by driving the anchor elements. Easy to crush along 15. As a result, the implantation resistance of the anchor element is reduced, so that the burden on the operator can be reduced. The tensile strength is determined according to JIS P8113 (2006).

The length L from the upper end of the upper curved portion 12b to the lower end of the lower curved portion 13b of the anchor element fixing capsule 1 is preferably 50 to 700 mm, more preferably 80 to 600 mm. Also, the diameter D of the anchor element fixing capsule 1 is preferably 8 to 50 mm, more preferably 10 to 45 mm. The length L and diameter D are selected to be somewhat smaller than the depth and diameter of the drilled hole in the concrete skeleton. For example, an anchoring element anchoring capsule 1 with a length L of 80 mm and a diameter D of 10.8 mm is inserted into a drilled hole with a depth of 80 mm and a diameter of 12 mm. The anchor element fixing capsule 1 having a length L of 240 mm and a diameter D of 25 mm is inserted into a drilled hole having a depth of 240 to 250 mm and a diameter of 30 mm.

In particular, the small anchor element anchoring capsule 1 having a length L of 80 to 240 mm and a diameter D of 10 to 18 mm has a small volume ratio of the water-permeable nonwoven sheet 10a to the anchor element anchoring agent 20, and the hardened anchor. The volume of the fragments of the water-permeable nonwoven sheet 10a relative to the volume of the element fixing agent 20 is relatively large. The water-permeable nonwoven sheet 10a of the cylindrical container 10 of the anchor element fixing capsule 1 has the above basis weight, and the fixing agent paste 20a penetrates quickly. without compromising robustness.

The anchor element fixing capsule 1 is manufactured as follows, referring to FIG. 2 showing the manufacturing process.

First, the original water-permeable nonwoven sheet 10a is cut into a predetermined size to cut out a rectangular water-permeable nonwoven sheet 10a. As shown in FIG. 2(a), it is wound around, for example, a cylindrical jig (not shown) to form a surface that will be the outer surface 10a1 of the cylindrical container ₁₀ and a back surface that will be the inner surface _10a2 . are overlapped along the long sides of the water-permeable nonwoven sheet 10a.

By applying heat and pressure to the overlapped portion for thermal fusion bonding, so-called envelope bonding, a joint portion 14 as shown in FIG. 2(b) is formed. As a result, a single water-permeable nonwoven sheet 10a forms a cylinder that is open at the upper end 12 and the lower end 13. As shown in FIG. At this time, the width of the joint portion 14 is preferably 2 to 5 mm, more preferably 3 to 4 mm. If the width is smaller than this range, the strength of the joint portion 14 is insufficient, and the joint portion 14 is peeled off when the cylindrical container 10 is filled with the anchor element fixing agent 20 in a later step. If this range is exceeded, the water-permeable non-woven sheet 10a is used more than necessary, which is not only uneconomical, but also makes it difficult for the joint site 14 to be crushed by the piercing of the anchor elements, resulting in a cured anchor element fixing agent. will cause a decrease in strength. Note that the water-permeable nonwoven sheet 10a may be cut from the raw fabric after forming the joining portion 14. As shown in FIG.

As shown in FIG. 2(b), the facing portions of the lower edge 13c of the lower end portion 13 are folded toward the central axis of the cylindrical water-permeable nonwoven sheet 10a to form a lower folded portion 13d. do. Next, as shown in FIG. 4(c), the other parts of the lower edge 13c facing each other are overlapped and folded back many times so as to wind toward the upper end 12 to close the opening of the lower end 13 and close the lower end. forming a portion 13a; Further, heat and pressure are applied by a heat sealer to heat-seal the lower end closing portion 13a, and the tubular container 10 is produced.

Subsequently, as shown in FIG. 2(d), a predetermined amount of anchor element fixing agent 20 is filled into the cylindrical container 10 through the opening of the upper end portion 12. Then, as shown in FIG. Since the bottom folded portion 13d is stretched and swelled by the load of the anchor element fixing agent 20 to form a gently curved surface, the bottom curved portion 13b has a dome shape curved over its entire circumference. Finally, the upper end portion 12 is subjected to the steps of FIGS. Here, when the upper end portion 12 is subjected to the step of FIG. 1C, the folded back of the upper end portion 12 hits the anchor element fixing agent 20 filled in the cylindrical container 10, and the cylindrical body portion 11 and both ends are curved. Repeat until the parts 12b and 13b become tense. Thereby, the anchoring element fixing agent 20 is enclosed in the tubular container 10 while being tightly packed in a non-flowable manner. Through these steps, the anchor element fixing capsule 1 is completed.

In the cylindrical container 10, since the nonwoven sheet 10a has liquid-permeable voids, the resin in the nonwoven sheet 10a melted by the heat sealer enters the voids and then cools and hardens. The resin that has entered the voids increases the bonding area between the nonwoven sheets 10a at the both end blocking portions 12a, 13a and the bonding portion 14, and also exhibits an anchoring effect. The joining portion 14 is strongly joined. As a result, even if the pressure of the anchor element fixing agent 20 packed in the cylindrical container 10 causes the both curved portions 12b and 13b and the joint edge 14a to peel off, the both end closed portions 12a and 13a and the joint portion are prevented from being peeled off. 14 does not peel off. As a result, the cylindrical container 10 can be kept in tension.

A method of using the anchor element fixing capsule 1 will be described with reference to FIG. 3, which is a schematic cross-sectional view showing an example of concrete frame reinforcement work.

FIG. 3(a) shows a step of forming a drilling hole 32 in a concrete frame 31. As shown in FIG. A core boring machine 41 is set on the surface 31 a of the concrete frame 31 , and a core drill 42 attached to the tip thereof is rotated to form a cylindrical bore 32 . The drill holes 32 can be formed horizontally, vertically and obliquely.

FIG. 3(b) shows the step of inserting the anchor element fixing capsule 1 into the drilled hole 32. As shown in FIG. The anchor element fixing capsule 1 is immersed in a tray 52 filled with water 51 until no air bubbles 53 are generated, and the water 51 permeating through the cylindrical container 10 and entering is absorbed by the anchor element fixing agent 20.例文帳に追加Thereby, the anchor element fixer 20 is changed into a fixer paste 20a having fluidity and viscosity. After the anchor element fixing capsule 1 is taken out of the water 51, it is inserted into the drilled hole 32 from the upper end 12 side, for example. Since the water-permeable non-woven sheet 10a has the above basis weight and is made of paper containing resin, it can be immersed in the water 51 for a short time, and is not easily torn or dispersed in water. Further, even when the anchor element fixing capsule 1 is taken out of the water 51, the cylindrical container 10 can retain strength to the extent that it can be handled by hand.

FIG. 3(c) shows the step of driving reinforcing steel bars, which are anchor elements for reinforcing civil engineering. The reinforcing bar 43 has a base end forming a plane substantially perpendicular to its central axis, and a sharply pointed tip so as to easily break through the cylindrical container 10 . The overall length of the reinforcing bar 43 is slightly less than the depth of the drilled hole 32 so as to satisfy the anchoring length of the anchoring elements specified in the standard.

The reinforcing reinforcing bar 43 is driven into the drilled hole 32 while applying impact and rotation to the base end of the reinforcing reinforcing bar 43 with a vibrating drill 44 . First, the curved lower end portion 13b of the lower end portion 13, which is first in contact with the tip of the reinforcing reinforcing bar 43 and tense due to the internal pressure of the fixing agent paste 20a, is pierced by the reinforcing reinforcing bar 43 and broken. Since the tensile strength in the longitudinal grain direction along the joint portions 14 of the water-permeable non-woven sheet 10a is higher than the tensile strength in the transverse grain direction, the cylindrical container 10 can be quickly and easily removed at the joint edges 14a where stress concentration is likely to occur. split in a straight line. The fixer paste 20a is evenly ejected from the cracks of the two joint edges 14a in addition to the cracks of the lower curved portion 13b. The cylindrical container 10 is crushed into pieces by the reinforcing reinforcing bars 43 which are rotated and hit.

The tubular container 10 may have a weakened portion along the longitudinal direction of the tubular container 10 at the joining portion 14 and/or the joining edge 14a (not shown). The weakened portion may be a perforated line slightly cut into the water-permeable nonwoven sheet 10a or a thin portion obtained by partially reducing the thickness of the perforated line. By providing the fragile portion, the cylindrical container 10 can be crushed more quickly and more finely.

The ejected fixing agent paste 20a clings to the reinforcing reinforcing bar 43 as it rotates, quickly seeps into pieces of the water-permeable nonwoven sheet 10a of the crushed cylindrical container 10, and fills the hole 32. It flows into the gap between the inner wall surface and the reinforcing bar 43 . The flow of the fixer paste 20a is thereby not impeded. In this manner, the gap between the reinforcing reinforcing bar 43 and the inner wall surface of the drilled hole 32 is evenly filled with the fixing agent paste 20a.

FIG. 3(d) shows the concrete skeleton 31 that has undergone the steps shown in FIGS. 3(a) to 3(c). A hardened body 20 b produced by hardening the fixing agent paste 20 a closes the opening of the drilled hole 32 and densely fills the space between the inner wall surface of the drilled hole 32 and the reinforcing reinforcing bar 43 . The reinforcing reinforcing bars 43 are fixed to the concrete skeleton 31 . Since the anchor element fixing capsule 1 does not use a metal stapler for forming the both-end blocking portions 12a and 13a, the reinforcing reinforcing bars 43 are not subjected to electrolytic corrosion. Therefore, the reinforcement reinforcing bars 43 do not rust and the shear strength of the concrete skeleton 31 is maintained for a long period of time.

Note that the anchor element is not limited to a reinforcing bar, and may be an anchor bolt that has threads on its surface so that a nut can be screwed thereon. Thereby, workpieces such as signboards, fences, handrails, and decorative panels can be attached and fixed to the concrete skeleton.

FIG. 4 shows a perspective view of another form of the anchor element fixing capsule 1 during manufacture. The cylindrical container 10 of the anchor element fixing capsule 1 may have a plurality of joint portions 14 by attaching a plurality of water-permeable nonwoven sheets 10a and 10b to each other. In this case, for example, as shown in FIG. 1(a), water-permeable non-woven sheets 10a and 10b are bent in an arch shape so that the edges of the long sides of the sheets 10a and 10b face each other. While facing the inner surface 10a2 of the first water permeable nonwoven sheet 10a and the inner surface _10b2 of the _second water permeable nonwoven sheet 10b, the outer surface 10a1 of the _first water permeable nonwoven sheet 10a , the inner side surface 10b2 of the _second water-permeable nonwoven sheet 10b overlaps the edges on the long side, and the inner side surface 10a2 of the first water-permeable nonwoven sheet 10a and the _second water-permeable nonwoven sheet 10a overlap each other. _The outer surface 10b1 of the sheet 10b is overlapped, and the overlapped portion is covered with an envelope. Thereby, as shown in FIG.

Also, a plurality of bonding sites 14 may be formed as shown in FIG. The inner surface 10a2 of the first water-permeable nonwoven sheet 10a bent in an arch shape and the inner surface 10b2 of the _second water-permeable nonwoven sheet 10b bent in an arch shape with a larger diameter are opposed to _each other. At the same time, the outer surface 10a1 of the _first water permeable nonwoven sheet 10a and the inner surface 10b2 of the _second water permeable nonwoven sheet 10b are partially overlapped to be enveloped.

As shown in FIGS. 4 and 5, according to the anchoring element-fixing capsule 1 having a plurality of bonding sites 14, the number of bonding edges 14a that are torn by anchoring the anchoring elements is increased. The fixer paste 20a flows out more quickly and fills the gap between the anchor element and the inner wall surface of the bore 32 more uniformly. In addition, the friability of the cylindrical container 10 is improved, and the anchor element's impact resistance can be further reduced. 4 and 5 show an example in which the cylindrical container 10 has two joint portions 14, but the number of joint portions 14 possessed by the cylindrical container 10 is not limited to this. It may be more.

The water-permeable nonwoven sheet 10a may be embossed. According to this, the specific surface area of the water-permeable nonwoven sheet 10a is increased, and the embossed portions are strongly adhered to each other by heat-sealing. can improve the strength of

The water-permeable nonwoven sheet 10a preferably contains nonwoven fibers and resin. The nonwoven fiber is preferably paper from the viewpoint of poor water permeability and stretchability and increased fragility due to water wetting. The resin preferably coats the surface of the paper, which is a non-woven fiber, is mixed or blended with the paper in the form of fibers, or is impregnated with the paper. The resin is preferably a thermoplastic resin from the viewpoint of heat-sealing the water-permeable nonwoven sheet 10a.

The paper, which is the material of the water-permeable nonwoven sheet 10a, is preferably nonwoven fiber containing cellulose fibers as a main component, and specifically includes fine paper, medium quality paper, kraft paper, Kent paper, and imitation paper. , crepe paper, heatron paper, cone paper, Japanese paper, tea bag paper and filter paper (based on JIS P0001 (1998)). These raw materials are either wood pulp such as softwood pulp or hardwood pulp, non-wood pulp such as mitsumata, straw, bagasse, reeds, kenaf, mulberry, etc., or waste paper pulp. may be used, or a plurality of them may be mixed and formed. The paper may also be synthetic fiber paper such as rayon paper or acetate paper.

Polyolefin resins such as polyethylene and polypropylene; polyester resins such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polytributylene terephthalate; nylon 6, nylon 66, and polybutylene terephthalate; polyamide resins such as aramid; and polyacrylic resins based on acrylonitrile. The content of these resins in the water-permeable nonwoven sheet 10a is preferably 10 to 60% by mass, preferably 20 to 50% by mass. If the resin content is lower than this range, the water-permeable nonwoven sheet 10a cannot be sufficiently heat-sealed, and the anchor element fixing agent 20 cannot be packed into the cylindrical container 10 or the anchor element fixing capsule 1 cannot be transported. The both end blocking portions 12a and 13a and the joint portion 14 are peeled off when handling or handling. On the other hand, if the content is higher than this range, the cylindrical container 10 will be difficult to break when the reinforcing bar is hammered, and the hammering resistance will increase.

Anchor element fixatives 20 include dry mortar, non-shrink grout, cement, polymer cement mortar, polymer mortar, and polymer impregnated mortar.

Although the water-permeable non-woven sheet 10a is used as the material for the tubular container 10, a water-soluble resin sheet that dissolves in water may be used instead. Examples of soluble resins that form soluble sheets and meshes include polyvinyl alcohol, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, carboxymethyl starch, methyl starch, propylene glycol alginate, alginate, and polyvinyl alcohol. , polyvinylpyrrolidone, starch, mannan, locust bean gum, carrageenan, pectin, casein, albumin, collagen, soy protein, wheat protein, glutelin, glucagon, and gelatin.

FIG. 6 shows an example of an anchor element-fixing capsule 2 produced using a cylindrical container 10 made of such a water-soluble resin sheet. A cylindrical container 10 of the anchor element fixing capsule 2 shown in the figure is formed of a rectangular water-soluble resin sheet 10c. This water-soluble resin sheet 10c is made of polyvinyl alcohol. Therefore, the water-soluble resin sheet 10c dissolves upon contact with water. The preferred basis weight or basis weight and density of the water-soluble resin sheet 10c are the same as those of the water-permeable nonwoven sheet 10a. The water-soluble resin sheets 10c are bonded together by heat-sealing on one side of each of the front and back surfaces along two long sides facing each other. The heat-sealed portion is a bonding portion 14 that is bonded together with an integral width. The tubular container 10 has an upper end closing portion 12a and a lower end closing portion 13a which are heat-sealed at their back surfaces along the opposite short sides of the water-soluble resin sheet 10c.

This anchor element fixing capsule 2 is manufactured as follows. The joining portion 14 and the lower end closing portion 13a are formed by heat sealing. An anchor element fixing agent 20 is put into the cylindrical container 10 from the open upper end of the cylindrical container 10 . The back surface near the upper end opening of the water-soluble resin sheet 10c is handled so as to be in close contact with the upper end surface of the anchor element fixing agent 20, and after the upper end opening of the cylindrical container 10 is closed, a It is heat-sealed over its entire circumference. Thereby, the anchor element fixing agent 20 is enclosed in the cylindrical container 10 while being tightly packed so as not to flow. As a result, the upper end curved portion 12b and the lower end curved portion 13b having the same shape as each other are formed at the upper end portion 12 and the lower end portion 13, and the upper end portion 12, the cylindrical body portion 11 having a substantially cylindrical shape, and the lower end portion are formed. An anchoring element anchoring capsule 2 taut over 13 is produced.

FIG. 7 shows an example of the first half of the anchor element fixing method using the anchor element fixing capsule 2 having the cylindrical container 10 made of the water-soluble resin sheet 10c. A cylinder cartridge 60 shown in FIG. 6(a) has a cylindrical body 62 having an opening 63 at its proximal end, and a tip 61 protruding from the opening 63 at the tip of the cylindrical body 62. have. The tube tip 61 is connected to the inner space of the cylindrical body 62 and communicates the inner space of the cylindrical body 62 with the outside world. A male thread is provided on the outer peripheral surface of the tube tip 61 , and a cap 61 a having a female thread on its inner peripheral surface is screwed onto the male thread of the tube tip 61 . First, the anchor element fixing capsule 2 is inserted through the opening 63 of the cylinder cartridge 60 .

Next, as shown in FIG. 7(b), water 51 contained in bottle 54 is introduced into cylindrical body 62 through opening 63. Then, as shown in FIG. The amount of water 51 is predetermined according to the type and amount of anchor element fixing agent 20 . The bottle 54 preferably contains a quantity of water 51 determined according to the anchoring element fixative 20 . According to this, the operator does not need to measure the water 51 each time, and it is sufficient to put the entire amount of the water 51 in the bottle 54 into the cylindrical body 62, and even an inexperienced operator can easily and reliably perform the work. Therefore, uniform construction is possible, construction management can be simplified, and construction efficiency can be improved.

When the water 51 and the cylindrical container 10 made of the water-soluble resin sheet 10c come into contact with each other, the cylindrical container 10 absorbs the water 51 and dissolves. At this time, the water 51 is uniformly absorbed over the entire cylindrical container 10 , so the water 51 is not unevenly distributed in a part of the cylindrical body 62 . Therefore, the anchor element fixing agent 20 which is powdery dry mortar uniformly absorbs the water 51 . As described above, according to the anchor element fixing capsule 2, only by putting the water 51 into the cylinder cartridge 60, the anchor element fixing agent 20 absorbs the water 51 to prepare the fixing agent paste 20a. As a result, it is not necessary to immerse the anchor element fixing capsule in water for a certain period of time, so that the anchor fixing operation can be performed quickly.

FIG. 7C shows the stirring process of the fixing agent paste 20a. The stirrer 70 is connected to a rotating rod 72 having two stirring blades 73 protruding from its tip, and to the base end of this rotating rod 72. It has a rotary tool 71 that rotates in the direction of rotation. The stirring blade 73 has an oval-shaped plate portion 73b having two straight sides facing each other and two arc-shaped sides connecting one end and the other end of the two sides, and the two arc-shaped sides. Protrusions 73d that protrude along arcs, openings 73a that are symmetrically formed in the plate portion 73b, and tongues 73c that partially connect to the openings 73a and protrude in a direction away from the protrusions 73d. and The stirring blade 73 is fixed by welding to a rotating rod 72 passing through the center of the plate portion 73b that sandwiches the opening 73a. The two stirring blades 73 are fixed in series to the rotating rod 72 so as to intersect each other with the tongue portions 73c facing each other.

The stirring blade 73 is inserted into the cylindrical body 62 together with the rotating rod 72 . When the rotating tool 71 is operated, the rotating rod 72 and the stirring blades 73 are rotated. The fixing agent paste 20a in the cylinder cartridge 60 is agitated by coming into contact with the agitating blade 73 and being agitated. As a result, the remaining undissolved water-soluble resin sheet 10c of the tubular container 10 is completely dissolved, and the crushed pieces do not remain in the fixing agent paste 20a. The stirring time is preferably 20 to 60 seconds, more preferably 20 to 40 seconds. To prevent the fixer paste 20a from leaking from the opening 63 when stirring the fixer paste 20a, the cylinder cartridge 60 may be fixed vertically with the opening 63 directed upward and the tube tip 61 directed downward.

The mortar particles in the fixing agent paste 20 a are dispersed by being stirred, and are uniformly mixed with the water 51 . Since the fixer paste 20a has fluidity, it is possible to remarkably reduce the push-out resistance when the fixer paste 20a is extruded from the cylinder cartridge 60 and injected into the drilled hole (see FIG. 8(c)). , the burden on workers can be reduced.

Next, as shown in FIG. 7(d), a disk-shaped cover 64 slightly smaller than the inner diameter of the cylinder 62 and the opening 63 is fitted into the opening 63. Then, as shown in FIG. The lid body 64 can move within the cylinder body 62 in accordance with the pressure toward the tube tip 61 . Next, the injection tube 61c is connected to a nozzle 61b having the same female thread as the cap 61a on the base end side and a discharge port opening at the tip. The injection tube 61c and the tip of the nozzle 61b gradually narrowed toward the discharge port are tightened and fixed with a fastener 61d. Further, the cap 61a is removed, and the nozzle 61b to which the injection tube 61c is connected is screwed onto the tube tip 61 and attached.

The injection gun 80 shown in FIG. 7(e) has a curved eaves trough shape having a slightly larger diameter than the cylindrical body 62 of the cylinder cartridge 60, and a cylindrical body supporting portion 82 for supporting the cylindrical body 62; A distal end side support portion 81 erected at the distal end of the body support portion 82 and supporting the distal end side of the cylindrical body 62, a proximal end portion 85 provided at the proximal end of the cylindrical body support portion 82, and fixed to the proximal end portion 85. , a piston 83 that is movable between the distal end side support portion 81 and the proximal end portion 85 on the cylindrical support portion 82, and a proximal end portion 85 and an operating portion 84 that are connected to the piston 83 at one end. and a delivery rod 86 which extends through and is curved to fold back at the other end.

The tip side support portion 81 has two claws so that it can support the cylinder cartridge 60 by contacting the tip side of the cylindrical body 62 without contacting the tip 61 . The operating portion 84 has a grip portion 84b that is gripped by the operator's palm and thumb, and a trigger 84a that is hooked by the operator's fingers other than the thumb. The trigger 84a and the delivery rod 86 are connected via, for example, a ratchet mechanism. When the trigger 84a is pulled and moves toward the grip portion 84b, the delivery rod 86 is delivered toward the distal end side support portion 81, and the piston 83 moves on the cylinder support portion . The piston 83 has a disc shape with a slightly smaller diameter than the cylinder 62 and the opening 63 so that it can move into the cylinder 62 from the opening 63 of the cylinder cartridge 60 set in the injection gun 80 and press the cover 64 . None.

The cover 64 is fitted into the opening 63, and the delivery rod 86 is pulled away from the distal end support portion 81 to move the piston 83 toward the proximal end portion 85 side. The cylinder cartridge 60 is set in the injection gun 80 so that the tube tip 61 protrudes between the two claws of the tip end side support portion 81 . Next, the trigger 84 a is pulled a plurality of times to move the piston 83 toward the tip side support portion 81 until it abuts against the lid 64 .

FIG. 8 shows an example of the second half of the anchor element fixing method using the anchor element fixing capsule 2 . The figure shows the process of attaching the supports for fixing the rockfall protection net to the upholstered concrete by the pouring method.

The concrete covering 33 shown in FIG. 8(a) is formed by concrete covering to the slope 34 and covers the slope 34 with a substantially uniform thickness. Therefore, the surface 33a of the upholstered concrete 33 is inclined. An operator sets a core boring machine 41 on the surface 33 a and rotates a core drill 42 attached to the tip of the machine to form a cylindrical hole 35 .

As shown in FIG. 8(b), the operator inserts the injection tube 61c into the drilled hole 35 and pulls the trigger 84a. The fixing agent paste 20a is extruded and injected into the bore 35 through the injection tube 61c. The operator injects the fixer paste 20a until it slightly overflows from the drilled hole 35 .

FIG. 8(c) shows the step of implanting the anchor element. The anchor bolt 45, which is an anchor element, is inserted into the drilled hole 35 filled with the fixing agent paste 20a and the proximal end forming a plane substantially perpendicular to its central axis (see FIG. 4(d)). It has a sharp pointed tip, for ease of use. A plurality of ribs 45a protrude from the tip of the anchor bolt 45 to the middle. A male thread 45 b is provided on the surface of the proximal end of the anchor bolt 45 . A nut 46 for fixing the pillar of the rockfall protection net is screwed to the male screw 45b (see FIG. 4(d)). The overall length of the anchor bolt 45 satisfies the fixing length of the anchor bolt indicated in the standard.

The operator grips the base end of the anchor bolt 45 with the hand 47 and inserts it into the fixing agent paste 20a in the drilled hole 35 so as to pierce it. Due to the fixer paste 20a having moderate fluidity and the sharp tip of the anchor bolt 45, the operator can easily drill the hole 35 filled with the fixer paste 20a through the anchor bolt 45 without much force. can be driven into The operator supports the anchor bolt 45 in the drilled hole 35 with a hand 47 so as to form a predetermined angle. When the setting is completed, the fixing agent paste 20a begins to harden, so that the anchor bolt 45 is fixed in the drilled hole 35 while maintaining a predetermined angle without requiring support by the operator.

FIG. 8(d) shows the stretched concrete 33 that has undergone the steps shown in FIGS. 8(a) to 8(c). A hardened body 20 b produced by hardening the fixing agent paste 20 a closes the opening of the drilled hole 35 and is densely filled between the inner wall surface of the drilled hole 35 and the anchor bolt 45 . Moreover, since the crushed pieces of the cylindrical container 10 of the anchor element fixing capsule 2 do not remain in the hardened body 20b, the hardened body 20b can exhibit extremely high compressive strength. Therefore, the hardened body 20b is fixed to the upholstered concrete 33 with high strength. A nut 46 is screwed onto a male screw 45b at the proximal end of the anchor bolt 45 to fix the post 48 thereon. Due to the anchor effect of the ribs 45a, the anchor bolts 45 improve the pull-out strength from the hardened body 20b.

An example to which the anchor element fixing capsule of the present invention is applied and a comparative example which is a conventional anchor element fixing capsule to which the present invention is not applied are shown below.

(Example 1)
A water-permeable nonwoven sheet 10a having a basis weight of 18 g/m ² was prepared by blending 60% by mass of pulp and 40% by mass of polyester fiber (melting point: 220° C.) mainly composed of polyethylene terephthalate. When the tensile strength in the 15 direction of the long grain and the 16 direction of the horizontal grain of this water-permeable nonwoven sheet 10a was measured, it was 10.8 N/15 mm in the 15 direction of the long grain and 4.9 N/15 mm in the 16 direction of the horizontal grain. . The water-permeable non-woven sheet 10a is rolled along the longitudinal grain 15 direction to form a cylinder having openings at _both ends, and one end of the outer surface 10a1 and _one end of the inner surface 10a2 are overlapped and heat-sealed. By fusion bonding, a joining portion 14 having a width of 3 mm was formed along the longitudinal stitches 15 (envelope pasting). The lower end portion 13 of the tube was crushed to close the opening, and the lower end portion 13 was bent so that both ends of the lower edge 13c formed thereby faced each other. Further, the lower end edge 13c is folded back while being wound a plurality of times toward the upper end portion 12, and a portion of the overlapping lower end portion 13 is heat-sealed by heat sealing to form the lower end closing portion 13a, thereby obtaining the cylindrical container 10. rice field.

The cylindrical container 10 was filled with 50 g of dry mortar as the anchor element fixing agent 20 through the opening of the upper end portion 12 of the cylindrical container 10 . Finally, an operation similar to that for forming the lower end portion 13 was performed to form the upper end closed portion 12a and to obtain the anchor element fixing capsule 1 of the example stuffed with the anchor element fixing agent 20 . The anchor element fixing capsule 1 had a diameter D of 10.8 mm and a length L of 80 mm. The inside of the cylindrical container 10 was filled with the anchor element fixing agent 20, and even when the anchor element fixing capsule 1 was tilted or shaken, the anchor element fixing agent 20 did not flow, and the outer shape of the anchor element fixing capsule 1 did not change. .

(Comparative example 1)
A fiber cloth 91 was prepared by blending 70% by mass of pulp and 30% by mass of polypropylene fiber (melting point 160° C.) and having a basis weight of 30 g/m ² . When the tensile strength in the grain direction and the grain direction of this fiber cloth 91 was measured, it was 24.5 N/15 mm in the grain direction and 9.7 N/15 mm in the grain direction. A fiber cloth 91 is rolled along the longitudinal grain direction to form a cylinder having openings at both ends, the inner surfaces 91a of the fiber cloth 91 are overlapped at one end, and sewn with a thread 92 along the longitudinal grain direction. Then, an overlapped portion 91c having a width of 5 mm was formed (sticking palms together). One of the openings was folded, closed, and fastened with a metal stapler 93 to obtain a bag body 94 having a cylindrical portion 91c. A bag body 94 is filled with anchor element fixing agent 95 of the same type and mass as that of the embodiment through the unclosed opening, and the opening is folded and closed, and then fastened with a metal stapler 93 to obtain a conventional anchor as a comparative example. An element fixing capsule 90 was obtained. The overlapped portion 91c is a part of the cylindrical portion 91b and protrudes outward. The cylindrical portion 91b of the conventional anchor element fixing capsule 90 had a length of 80 mm, a major diameter of 13 mm, and a minor diameter of 8 mm. When the conventional anchor element fixing capsule 90 was tilted or shaken, the anchor element fixing agent 95 flowed in the cylindrical portion 91b, and the outer shape of the conventional anchor element fixing capsule 90 changed each time.

(Water absorption test)
Nine anchor element fixing capsules 1 of Example 1 and nine anchor element fixing capsules 90 of Comparative Example 1 were prepared, and the weights of all of them were measured. Then, all of them were immersed in water at a temperature of 20° C. to absorb water, and after 0.5 minutes from the start of immersion, they were taken out and their masses were measured. The water absorption was obtained from the ratio of the mass before water absorption to the mass after water absorption. Further, the water absorption rate was determined in the same manner for the water absorption times of 1, 2, 3, 5, 8, 10, 12 and 14 minutes. Table 1 shows the results.

As shown in Table 1, the water absorption rate of the anchor element fixing capsule 1 of Example 1 was constant over a water absorption time of 1 to 14 minutes, whereas the water absorption rate of the anchor element fixing capsule of Comparative Example 1 increased as the water absorption time increased. progressed and the water absorption increased. The anchor element-fixing capsule 1 of Example 1 was capable of absorbing a desired amount of water simply by being immersed in water.

(Comparative example 2)
A water-permeable nonwoven sheet having a basis weight of 5 g/m ² was prepared by blending 60% by mass of pulp and 40% by mass of polyester fiber (melting point 220° C.) mainly composed of polyethylene terephthalate. The tensile strength of this water-permeable nonwoven sheet in the grain direction and the grain direction was measured to be 3 N/15 mm in the grain direction and 0.9 N/15 mm in the grain direction. Using this water-permeable nonwoven sheet, a cylindrical container was produced in the same manner as in Example 1. Using this cylindrical container, the same operation as in Example 1 was performed to obtain an anchor element fixing capsule of Comparative Example 2. Even when the anchor element-fixing capsule of Comparative Example 2 was tilted or shaken, the anchor element-fixing agent did not flow, and the outer shape of the anchor element-fixing capsule did not change.

(Construction test)
A plurality of drilled holes with a depth (drill length) of 80 mm and a diameter of 12 mm were drilled vertically from the upper surface to the lower surface of the cube-shaped concrete mass using a hammer drill. The anchor element fixing capsules of Example 1 and Comparative Examples 1 and 2 were each immersed in water at 20° C. for 2 minutes to allow the anchor element fixing agent to absorb the water, and then inserted into the drilled hole. (Full-threaded bolt M8, cut short) was driven in with a vibrating drill.

At this time, the workability of inserting the anchor element fixing capsule, the anchoring performance, and the drilling and filling performance were evaluated. Regarding the insertion of the anchor element-fixing capsule, the case where the anchor element-fixing capsule could be inserted smoothly was evaluated as ◯, and the case where the anchor element-fixing capsule interfered with the opening of the drilled hole or the inner wall surface during insertion was evaluated as x. With respect to the setting of anchors, ◯ indicates that the anchors could be driven in smoothly, Δ indicates that the anchors could be driven in but took a long time, and X indicates that they could not be driven in. The fillability of the drilled hole was visually confirmed from the opening of the drilled hole. If no gap was observed between the anchor bar and the inner wall surface of the drilled hole, it was evaluated as ◯. Table 2 shows the results.

(Pull-out test)
After performing a construction test and curing the anchor element fixing agent at 20° C. for 7 days, each of the 27 anchor lines fixed using the anchor element fixing capsules of Examples and Comparative Examples was stretched at 0.2 mm / min. pulled out at speed. Among the 27 anchors, the number of broken anchors and the number of broken anchors were confirmed. Table 2 shows the results. It should be noted that the larger the number of broken anchors, the stronger the fixing force of the anchors, indicating that the reinforcing effect is high.

As shown in Table 2, the anchor element anchoring capsule 1 of the example is superior to the conventional anchor element anchoring capsule 90 of the comparative example 1 in terms of workability during construction, and the anchor element, which is the anchor bar, is made of concrete. It was something that could be firmly fixed to the frame. On the other hand, in the cylindrical container of the anchor element-fixing capsule of Comparative Example 2, the basis weight of the water-permeable nonwoven sheet and the longitudinal and transverse tensile strengths were insufficient. The drug has leaked out. A construction test and a pull-out test using the anchor element fixing capsule of Comparative Example 2 could not be carried out.

(Examples 2-4)
As the water-permeable non-woven sheet 10a, the anchor element fixing capsules 1 of Examples 2 to 4, in which the basis weight and longitudinal grain tensile strength and transverse grain tensile strength were changed as shown in Table 3, were operated in the same manner as in Example 1. and made.

Next, a new concrete mass was prepared, and the drilling depth (drilling length) was changed to 50 mm. The operation was performed in the same manner as in the above construction test, except that the number of anchor lines was set to one for each anchor element fixing capsule 1 . Furthermore, for the anchor bars fixed using the anchor element fixing capsules 1 of Examples 1 to 4, a pull-out test was performed by operating in the same manner as described above while measuring the tensile load of the anchor bars, and the pull-out load (kN) at that time. peak was recorded. Table 3 shows the results. Since the depth of the drilled hole was short and the anchoring length of the anchor was short, all the anchor was pulled out.

As shown in Table 3, the lower the basis weight and the longitudinal and transverse tensile strengths of the water-permeable nonwoven sheet 10a, the higher the pull-out load.

(Example 5)
An anchor element fixing capsule 1 of Example 5 was produced in the same manner as in Example 1, except that the water-permeable nonwoven sheet 10a used in Example 1 was dyed with a red oily ink.

(Comparative Example 3)
An anchor element fixing capsule 90 of Comparative Example 3 was produced in the same manner as in Comparative Example 1 except that the fiber cloth 91 used in Comparative Example 1 was dyed with a red oily ink.

(Behavior confirmation test when placing anchor bars)
A transparent resin cylindrical tube having a depth of 80 mm and a diameter of 12 mm was prepared. Anchor bars using the anchor element fixing capsule 1 of Example 5 were operated in the same manner as in the above construction test except that this cylindrical pipe was used instead of drilling holes in the concrete frame in the above construction test. I set up. At this time, the cylindrical container 10 and the anchor element fixing agent 20 in the cylindrical tube before the anchor bar is placed, during the anchor bar is inserted by 40 mm, and after the anchor bar is inserted by 80 mm. behavior was photographed and recorded. The image was taken from a position facing the joining portion 14 of the cylindrical container 10 . For Comparative Example 3, the same operation as in Example 5 was carried out to conduct a behavior confirmation test during anchoring. At this time, the photographing was performed from a position facing the overlapping portion 91c. The results are shown in FIG.

As shown in FIG. 9, before placing, that is, immediately after being inserted into the cylindrical tube 36, the joint portion 14 of the anchor element fixing capsule 1 of Example 5 is inconspicuous and difficult to visually recognize at first glance. On the other hand, in the anchor element fixing capsule 90 of Comparative Example 3, the overlapped portion 91c of the ribs protruding from the cylindrical portion 91b was in contact with the inner wall surface of the cylindrical tube .

During the anchoring, the cylindrical container 10 of the anchor element fixing capsule 1 of Example 5 was finely crushed by the anchors inserted from the upper side to the lower side in FIG. flowed in the cylindrical tube 36 and spread from the lower end of the cylindrical tube 36 to the middle. The anchor element fixing capsule 90 of Comparative Example 3 tears straight from top to bottom along the overlapped portion 91c where force is likely to be concentrated when inserting the anchor, so the fixing agent paste 20a flows out of the bag body 94. It was difficult to move and did not flow down the cylindrical tube 36 . Therefore, a gap is generated between the cylindrical tube 36 and the bag body 94 which still maintains its shape.

After the anchor bars were set, the cylindrical container 10 of the anchor element fixing capsule 1 of Example 5 was all crushed into pieces, and the fixing agent paste 20a was spread almost uniformly within the cylindrical tube 36 . As a result, the inner space of the cylindrical tube 36 was filled with the fixing agent paste 20a. On the other hand, in Comparative Example 3, the fixing agent paste 20a that flowed out only from the overlapping portion 91c flowed downward in the cylindrical tube . Moreover, the outflow and flow of the fixing agent paste 20a are blocked by the bag body 94 and the overlapped portion 91c, which remain in the same shape after the anchor wire is set, and the fixing agent paste 20a spreads in the cylindrical pipe 36. I didn't. Further, the gap between the cylindrical tube 36 and the bag body 94, which was formed below the cylindrical tube 36 during anchoring, was maintained even after the anchoring. When the anchor element fixing capsule 90 of Comparative Example 3 was used, there was almost no change in the state inside the cylindrical tube 36 during and after anchoring.

As shown in FIG. 9, according to the anchor element fixing capsule 1 of Example 5 to which the present invention is applied, the fixing agent paste 20a uniformly flows inside the drilled hole (inside the cylindrical tube 36), and the inner wall surface of the drilled hole and the anchor element, the anchor element can be fixed to the concrete with high strength. On the other hand, the anchor element fixing capsule 90 of Comparative Example 3, to which the present invention was not applied, was unable to fill the hole with the fixing agent paste 20a.

The anchor element anchoring capsule and the anchor element anchoring method of the present invention are suitable for concrete artificial structures such as culverts, dam bodies, tunnels, buildings, bedrock, ground reinforcement such as natural cliffs, and post-installation anchor construction methods. Used.

1 and 2 are anchor fixing capsules, 10 is a cylindrical container, 10a and 10b are water-permeable nonwoven sheets, 10a ₁ is the outer surface, 10a ₂ is the inner surface, 10b is the nonwoven sheet, 10b ₁ is the outer surface, and 10b ₂ . 10c is a water-soluble resin sheet; 11 is a cylindrical body; 12 is an upper end; 12a is an upper end closed portion; 12b is an upper curved portion; 13c is the bottom edge, 13d is the bottom folded portion, 14 is the joining portion, 14a is the joining edge, 15 is the longitudinal mesh, 16 is the horizontal mesh, 20 is the anchor element fixing agent, 20a is the fixing agent paste, 20b is the cured body, 31 is a concrete frame, 31a is a surface, 32 is a drilled hole, 33 is a stretched concrete, 33a is a surface, 34 is a slope, 35 is a drilled hole, 36 is a cylindrical pipe, 41 is a core boring machine, 42 is a core drill, and 43 is a core drill. Reinforcing bar, 44 vibration drill, 45 anchor bolt, 45a rib, 45b male screw, 46 nut, 47 hand, 48 strut, 51 water, 52 tray, 53 bubble, 54 bottle, 60 is a cylinder cartridge, 61 is a cylinder tip, 61a is a cap, 61b is a nozzle, 61c is an injection tube, 61d is a fastener, 62 is a cylindrical body, 63 is an opening, 64 is a lid, 70 is a stirrer, 71 is a rotary tool, 72 is a rotating rod, 73 is a stirring blade, 73a is an opening, 73b is a plate portion, 73c is a tongue portion, 73d is a projecting portion, 80 is an injection gun, 81 is a tip side support portion, 82 is a cylinder support portion, 83 is a piston, 84 is an operation part, 84a is a trigger, 84b is a grip part, 85 is a base end part, 86 is a delivery rod, 90 is a conventional anchor fixing capsule, 91 is a fiber cloth, 91a is an inner surface, 91b is a cylinder. 91c is the overlapping portion, 91d is the end portion, 92 is the thread, 93 is the metal stapler, 94 is the bag body, 95 is the anchoring element fixing agent, L is the length, D is the diameter, and W is the width. .

Claims (4)

A cylindrical body made of a rectangular water- soluble resin sheet with a basis weight or basis weight of 10 to 50 g/m ² and joined along the long side by overlapping envelopes on the front and back sides at the joining sites and its short side. The anchor element anchoring capsule is tensioned by enclosing a cylindrical container having both closed ends that are constricted on one side and joined with a curable composition filled with a curable composition that is cured by contact with water. ,
the joint portions are overlapped on one side of each of the front and back surfaces, are attached or fused, and are thereby joined;
At least one of the two-end closing portions is folded back and fusion-bonded,
The cylindrical container has longitudinal grains along the long sides of the water-soluble resin sheet and transverse grains intersecting the long sides, and the water-soluble resin sheet has a tensile strength of 6 to 30 N/ in the longitudinal grain direction. 15 mm, 2 to 15 N/15 mm in the grain direction, and the grain has a higher tensile strength than the grain,
wherein the tubular container is taut and has a length of 50-700 mm and a diameter of 8-50 mm;
The anchor element fixing capsule , wherein the width of the joint portion is 2 to 5 mm . A plurality of the water-soluble resin sheets are overlapped and bonded to each other at the bonding portions on each of the front and back surfaces, so that the cylindrical container has a plurality of bonding portions. An anchoring element anchoring capsule according to claim 1. The anchor element fixing capsule according to claim 1 is immersed in the water, the water permeating the water-soluble resin sheet is brought into contact with the curable composition, and then the concrete, the ground, and/or the bedrock is opened. A method of fixing an anchor element, comprising inserting the anchor element fixing capsule into a drilled hole, inserting the anchor element into the drilled hole while piercing the anchor element, and curing the curable composition. After the anchor element fixing capsule according to claim 1 is placed in a cylinder cartridge having a tube tip at the tip and an opening at the base end, the water is introduced through the opening to dissolve the water-soluble resin sheet, and the water-soluble resin sheet is dissolved in response to pressure. A lid that moves in the cylinder cartridge toward the cylinder tip is inserted through the opening, and the lid is pressed to push out the curable composition from the cylinder tip, thereby opening the concrete, the ground, and/or the bedrock. A method of fixing an anchor element, comprising: injecting the anchor element into a drilled hole, inserting the anchor element into the drilled hole, piercing the curable composition, and curing the curable composition.

Images