JP5064548B2 - Continuous fiber band connector and slope stabilization method - Google Patents

Description

  In the present invention, for example, a band-shaped reinforcing material made of a resin containing a continuous fiber such as carbon fiber, aramid fiber, glass fiber or the like (hereinafter, a band-shaped reinforcing material containing a continuous fiber in the present invention is referred to as a continuous fiber band). TECHNICAL FIELD The present invention relates to a connecting device for continuous fiber bands that connect a slope and a slope stabilization method for stabilizing a slope.

  Conventionally, on natural slopes and slopes where surface layer collapse is expected, reinforcing materials arranged in a grid pattern are driven into the ground, and the tension generated by fixing the net to this reinforcing material is used. In addition, a slope stabilization method that stabilizes the slope by generating a relatively uniform deterrent force on the assumed slip surface is known. In such a slope stabilization method, a PC steel strand is generally used as a net for generating tension. (For example, refer to Patent Document 1).

  However, since the PC steel strand used as a net for generating tension in the slope stabilization method proposed in Patent Document 1 described above is made of steel, it is generally used for use conditions such as a corrosive atmosphere. In some cases, sufficient corrosion resistance and weather resistance cannot be expected. Further, although the wire is more prevalent than the anti-corrosion-treated PC steel, it may corrode when used over a long period of time, for example, on a soil near the coast where salt damage is expected or on a slope such as acidic soil.

  In recent years, continuous fiber bands have also become widespread as members having corrosion resistance and weather resistance. The continuous fiber band refers to a band-shaped fiber reinforcing material made of a resin reinforced with continuous fibers such as carbon fibers, aramid fibers, glass fibers and the like. Such continuous fiber bands have advantages such as light weight, high corrosion resistance, high strength, and low magnetism, and are mechanical and physical compared to conventional steel members typified by PC steel wire. Various properties are also stable and are recognized as tendons. However, the only weakness in strength is that the continuous fiber band is vulnerable to shearing. The shear strength of the continuous fiber band is as low as 1/4 to 1/5 that of a general steel material. Therefore, special care must be taken in handling.

  In the case of tension fixing of general PC steel, the wire is directly gripped by using a “wedge” having a tooth profile on the inner surface, and tension and fixing are performed at arbitrary positions. On the other hand, since the continuous fiber band has a low shear strength as described above, it is impossible to apply excessive shearing force such as directly gripping and fixing the continuous fiber band with the “wedge”.

Japanese Patent No. 3566219

  For example, as a member used to stabilize slopes such as soil near the coast where salt damage is expected or acidic soil, a continuous fiber band having corrosion resistance and weather resistance is more preferable than conventional steel members. However, since an excessive shearing force cannot be applied to the continuous fiber bands, it is extremely difficult to firmly fix the continuous fiber bands or firmly connect the continuous fiber bands.

  In view of the above circumstances, the present invention provides a continuous fiber band connector capable of firmly connecting continuous fiber bands, and a continuous fiber band disposed using such a continuous fiber band connector. It aims at providing the slope stabilization construction method which stabilizes.

  The connecting device for continuous fiber bands of the present invention that achieves the above-described object clamps the connection end portions of the continuous fiber bands by sandwiching the connection end portions of the continuous fiber bands on the crimping surfaces of the end members for crimping together the half-split surfaces of the pair of half-split columns. In addition, two end members wound around the outer periphery of the end member are opposed to each other and the end portions thereof are connected to each other by a connecting member. .

  Here, the “pair of halved columns” referred to in the present invention is most preferably a column that is a cylinder and halved along the diameter of the cylinder cross section, but other cross-sectional shapes such as a rectangular cross section. , An elliptical cross section, a hexagonal cross section, and the like, and are not limited to those divided in half along the diameter of the above-described cylindrical cross section. It may be divided in half along the chord of the cross section of the cylinder or in half along a straight line passing through the position of any cross section of the column.

  The continuous fiber band connector of the present invention uses an end member that is wound around the outer periphery with the connection end of the continuous fiber band sandwiched between the crimping surfaces. The connection end can be firmly grasped by avoiding the application of the shearing force. In addition, the continuous fiber band connector according to the present invention is configured by connecting two end members having the connection end portions of the continuous fiber band firmly held by the connection members. For this reason, it is possible to firmly connect the continuous fiber bands.

  Here, in the continuous fiber band connector according to the present invention, the connection member may be connected in a direction orthogonal to a direction of tension acting on the continuous fiber band, and the connection member may be Further, it may be connected in a direction parallel to the direction of tension acting on the continuous fiber band.

  Moreover, it is preferable that the continuous fiber band connector of the present invention includes a flat plate sandwiched between the crimping surfaces.

  When the strength of the half columnar body is insufficient, the strength can be increased by sandwiching the flat plate between the crimping surfaces. Moreover, the intensity | strength can be adjusted by changing the thickness of a flat plate.

  In addition, the slope stabilization method of the present invention that achieves the above object is to arrange a plurality of continuous fiber bands on the slope in a grid pattern, fix the ends of the continuous fiber bands to the ground, and form a curved raised portion. It is characterized in that an intersecting portion of the continuous fiber bands is pushed in the underground direction at a raised portion of the pushing plate, and a tension is applied to the continuous fiber bands to be crimped to a slope.

  In the slope stabilization method of the present invention, since a tension force is applied to the continuous fiber band using the pushing plate, it is avoided that an excessive shearing force is applied to the continuous fiber band. Therefore, according to the slope stabilization method of the present invention, the slope can be stabilized by tensioning the continuous fiber band.

  Here, in the slope stabilization method of the present invention, it is preferable that the continuous fiber bands are connected to each other with a connecting tool to have a required length.

  When the length of the continuous fiber band does not satisfy the necessary and sufficient length for the region of the slope to be stabilized, the connection of the continuous fiber bands that firmly connects the two connection ends of the continuous fiber band By using the tool, tension is applied to the continuous fiber band using the push-in plate, and tightening of the continuous fiber band wound around the outer periphery of the end member is further strengthened. Excessive shearing force is avoided and a continuous fiber band having a required length can be obtained.

  In the slope stabilization method of the present invention, it is also preferable that the push plate is made of high-strength fiber reinforced mortar.

  The high-strength fiber reinforced mortar is obtained by mixing steel fibers, organic fibers, and the like into the mortar and has high toughness. Therefore, the indentation plate made of such a high-strength fiber reinforced mortar is small and lightweight, and can obtain a large indentation force. When applied to the slope stabilization method of the present invention, the workability during construction is improved. In addition, refastening is easy, and maintenance and durability are high.

  Conventionally, it has been extremely difficult to firmly connect continuous fiber bands having low shear strength, but the continuous fiber band connector of the present invention has the connection end of the continuous fiber band sandwiched between the crimping surfaces. Since the two end members firmly gripped by the end members wound around the outer periphery are connected by the connecting member, the continuous fiber bands can be firmly connected.

  Furthermore, even if a tension is applied to the continuous fiber band disposed on the slope using the above-mentioned continuous fiber band connector, it is avoided that an excessive shearing force is applied to the continuous fiber band. According to the slope stabilization method of the present invention, the slope can be stabilized by tensioning the continuous fiber band.

It is the partial top view which looked at a part of slope protection device 10 with which one embodiment of the present invention was applied from the upper surface. It is a side view of the edge part fixing tool 21 shown in FIG. FIG. 3 is a top view of the end fixture 21 shown in FIGS. 1 and 2. It is a side view of the edge part fixing tool 22 shown in FIG. FIG. 5 is a top view of the end fixture 22 shown in FIGS. 1 and 4. It is a side view of the connection tool 31 shown in FIG. FIG. 7 is a top view of the connection tool 31 shown in FIGS. 1 and 6. It is a side view of the connection tool 32 shown in FIG. FIG. 9 is a top view of the connection tool 32 shown in FIGS. 1 and 8. It is a side view of the pushing plate formwork 50 for manufacturing the pushing plate 40 shown in FIG. FIG. 11 is a top view of the pushing plate formwork 50 shown in FIG. 10. It is a side view of the pushing plate 40 shown in FIG. FIG. 13 is a top view of the pushing plate 40 shown in FIGS. 1 and 12. It is the partial side view which looked at a part of slope protection device 10 shown in FIG. 1 from the side surface. It is a side view which shows the state which pinched | interposed the flat plate in the crimping | compression-bonding surface of the connector shown in FIG.1, FIG.6, FIG.7.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a partial top view of a part of a slope protector 10 to which an embodiment of the present invention is applied as viewed from above.

  A slope protection device 10 shown in FIG. 1 shows a part of a slope protection device arranged in a grid pattern on an inclined surface. Here, a plurality of continuous fiber bands 11, 12, 13, 14, and 15 arranged in the horizontal direction of the figure and a plurality of continuous fiber bands 16, 17, and 18 arranged in the vertical direction of the figure are shown. ing. Each end of the plurality of continuous fiber bands 11 to 18 is fixed to the ground by end fixtures 21 and 22. FIG. 1 shows an example in which the end portions of the continuous fiber bands 16 and 17 are fixed to the ground by the end fixing tool 22, and the end portions of the continuous fiber band 18 are fixed to the ground by the end fixing tool 21. ing. In addition, the plurality of continuous fiber bands 11 to 18 are connected to each other as required by connection tools 31 and 32 which are examples of the continuous fiber band connector according to the present invention. FIG. 1 shows an example in which the connection end portions of the continuous fiber bands 12 and 13 are connected by a connection tool 32, and the connection end portions of the continuous fiber bands 14 and 15 are connected by a connection tool 31. . Furthermore, a push plate 40 is provided at the intersection between the plurality of continuous fiber bands 11 to 18 to push the intersection in the underground direction and apply tension to each continuous fiber band 11 to 18 to be crimped to the slope. Has been.

  Next, the configuration of the end fixtures 21 and 22 shown in FIG. 1 will be described in detail with reference to FIGS. 2 to 5, and the configuration of the connection tools 31 and 32 shown in FIG. 1 will be described with reference to FIGS. The configuration of the push-in plate 40 shown in FIG. 1 will be described in detail with reference to FIGS.

  2 is a side view of the end fixture 21 shown in FIG. 1, FIG. 3 is a top view of the end fixture 21 shown in FIGS. 1 and 2, and FIG. 4 is an end view of FIG. FIG. 5 is a side view of the part fixture 22, and FIG. 5 is a top view of the end fixture 22 shown in FIGS.

  The end fixture 21 shown in FIGS. 2 and 3 is a fixing member that presses the halved surfaces 211a and 212a of the pair of halved cylinders 211 and 212 that are embodiments of the pair of halved columns of the present invention. The end portion 18a of the continuous fiber band 18 is sandwiched and clamped on the crimping surface 213a of 213, and the adjacent portion 18b of the end portion 18a is wound around the outer periphery 213b of the fixing member 213. Therefore, an excessive shearing force is prevented from being applied to the continuous fiber band 18 having a small shear strength, and the end portion 18a of the continuous fiber band 18 can be firmly grasped. In addition, the end fixture 21 is configured such that the fixing member 213 in which the end 18a of the continuous fiber band 18 is firmly gripped in this manner is fixed to the fixing body 215 fixed to the ground with the anchor bolt 214. 18 is fixed by two fixing bolts 216 in a direction parallel to the direction of the tension acting on 18, the end 18 a of the continuous fiber band 18 is firmly fixed.

  4 and 5, the end fixing tool 22 shown in FIGS. 4 and 5 is also combined with the half surfaces 221a and 222a of the pair of half cylinders 221 and 222 in the same manner as the end fixing tool 21 shown in FIGS. The end portion 16a of the continuous fiber band 16 is sandwiched and clamped on the crimping surface 223a of the fixing member 223 to be crimped, and the adjacent portion 16b of the end portion 16a is wound around the outer periphery 223b of the fixing member 223. In addition, the end fixture 22 is configured such that the fixing member 223 in which the end 16a of the continuous fiber band 16 is firmly gripped in this manner is attached to the fixing body 225 fixed to the ground with the anchor bolt 224. 16 is fixed by two fixing bolts 226 in a direction orthogonal to the direction of the tension acting on 16, the end 16a of the continuous fiber band 16 is firmly fixed.

  6 is a side view of the connection tool 31 shown in FIG. 1, FIG. 7 is a top view of the connection tool 31 shown in FIGS. 1 and 6, and FIG. 8 is a side view of the connection tool 32 shown in FIG. FIG. 9 is a top view of the connector 32 shown in FIGS. 1 and 8.

  The connection tool 31 shown in FIG. 6 and FIG. 7 has a connection end portion of the continuous fiber band 14 on the crimping surface 3113a of the end member 3113 that crimps the half surfaces 3111a and 3112a of the pair of half cylinders 3111 and 3112 together. 14a is sandwiched and tightened, and the connection end portion 15a of the continuous fiber band 15 is sandwiched and tightened on the crimping surface 3123a of the end member 3123 for crimping the half surfaces 3121a and 3122a of the pair of half cylinders 3121 and 3122 together. The adjacent portion 14 b of the connection end portion 14 a is wound around the outer periphery 3113 b of the end member 3113, and the adjacent portion 15 b of the connection end portion 15 a is wound around the outer periphery 3123 b of the end member 3123. Therefore, an excessive shearing force is avoided from being applied to the continuous fiber bands 14 and 15 having a low shear strength, and the connection end portions 14a and 15a of the continuous fiber bands 14 and 15 can be firmly grasped. In addition, the connection tool 31 opposes the two end members 3113 and 3123 in which the connection ends 14a and 15a of the continuous fiber bands 14 and 15 are firmly gripped in this manner, and the end members 3113 are opposed to each other. , 3123 are connected to each other by two high tension bolts 313 in a direction orthogonal to the direction of tension acting on the continuous fiber bands 14 and 15, so that the continuous fiber bands 14 and 15 are strong. Connected to.

  Similarly to the connection tool 31 shown in FIGS. 6 and 7, the connection tool 32 shown in FIGS. 8 and 9 also has an end member 3213 that presses the halved surfaces 3211 a and 3212 a of the pair of half cylinders 3211 and 3212 together. The crimping surface 3213a of the end member 3223 is clamped by sandwiching and tightening the connection end portion 12a of the continuous fiber band 12 to the crimping surface 3223a of the end member 3223 to which the half split surfaces 3221a and 3222a of the pair of half cylinders 3221 and 3222 are crimped. The connection end 13a of the continuous fiber band 13 is sandwiched and tightened, the adjacent portion 12b of the connection end 12a is wound around the outer periphery 3213b of the end member 3213, and the adjacent portion 13b of the connection end 13a is wound around the outer periphery of the end member 3223. It is wound around 3223b. In addition, the connection tool 32 makes the two end members 3213 and 3223 on which the connection ends 12a and 13a of the continuous fiber bands 12 and 13 are firmly gripped in this manner face each other, and the end members 3213. , 3223 are connected by two high tension bolts 323 in a direction parallel to the direction of the tension acting on the continuous fiber bands 12, 13, so that the continuous fiber bands 12, 13 are strong. Connected to.

  FIG. 10 is a side view of a push plate mold 50 for manufacturing the push plate 40 shown in FIG. 1, and FIG. 11 is a top view of the push plate mold 50 shown in FIG. 12 is a side view of the pushing plate 40 shown in FIG. 1, and FIG. 13 is a top view of the pushing plate 40 shown in FIGS.

  10 and 11, a mortar mixed with steel fibers or the like is placed and cured in an indentation plate mold 50 having a curved recess 50a, and after the mortar is hardened, it is pushed in from the indentation plate mold 50. By removing the plate 40, a pushing plate 40 having a raised portion 40a as shown in FIGS. 12 and 13 is obtained. Further, a through hole 40b into which an anchor bolt 60 described later is inserted is provided at the center portion of the pushing plate 40. The pushing plate 40 thus obtained is made of high-strength fiber reinforced mortar mixed with steel fibers and the like, and thus has high toughness. Therefore, an indentation plate made of such a high-strength fiber reinforced mortar is small and lightweight, and can obtain a large indentation force. When applied to the slope stabilization method of this embodiment, the workability during construction is improved. Improved, easy to retighten, high maintainability and durability, suitable.

  Hereinafter, the construction procedure of the slope stabilization method for stabilizing the slope using the slope protector 10 shown in FIG. 1 will be described with reference to FIGS. 14 is a partial side view of a part of the slope protection device 10 shown in FIG. 1 as viewed from the side, and both end portions of the continuous fiber band 17 are fixed to the ground by the end fixing tools 22, A state in which a tension force T is applied to the continuous fiber band 17 by the pushing plate 40 and is crimped to the inclined surface is shown.

  First, on the slope such as a natural slope or a slope where surface layer collapse is expected, the ground where the intersecting portions of a plurality of continuous fiber bands 11 to 18 arranged in a lattice shape are located as described later is bored. At the same time, a gap 60 is provided on the ground surface at each of the bored positions.

  Next, the anchor bolts 70 are inserted into the bored spaces, and mortar is placed under the spaces where the anchor bolts 70 are inserted to fix the anchor bolts 70 to the ground.

  Next, the plurality of continuous fiber bands 11 to 18 are arranged in a grid pattern on the slope so that the positions of the intersections between the plurality of continuous fiber bands 11 to 18 and the positions of the anchor bolts 70 fixed to the ground coincide with each other. Arrange. Moreover, the connection edge part of the some continuous fiber bands 11-18 is connected with the connection tools 31 and 32 shown in FIGS. 1, 6-9 as needed, and it is set as required length.

  Next, the respective end portions of the plurality of continuous fiber bands 11 to 18 are fixed to the ground by the end fixtures 21 and 22 shown in FIGS.

  Next, the pushing plate 40 is arrange | positioned in each cross | intersection part so that the protruding part 40a of the pushing plate 40 which has the curved protruding part 40a may contact | connect each cross part of several continuous fiber bands 11-18. At this time, the anchor bolt 70 fixed to the ground passes through the through hole 40b of the push-in plate 40.

  Next, a portion of the anchor bolt 70 fixed to the ground that protrudes upward through the through hole 40b of the push plate 40 is tightened with a nut 80, and a plurality of continuous fiber bands are formed at the raised portion 40a of the push plate 40. By applying a pushing force P to each of the intersecting portions of 11 to 18, these intersecting portions are pushed in the underground direction, and the pushing plate 40 is fixed to the ground, and a tension force T is applied to each continuous fiber band 11 to 18. Give. This pushing force P acts also as a pushing force p with respect to each continuous fiber band 11-18, and each continuous fiber band 11-18 is crimped | bonded to a slope by this pushing force p.

  Finally, a urethane resin or the like is filled in the gap 60 provided immediately below each intersection between the plurality of continuous fiber bands 11 to 18 to seal the gap 60. Thus, the nut 80 can be retightened by filling the gap 60 with a urethane resin having a contractibility and sealing the gap 60. The material that fills and seals the gap 60 is not limited to the urethane resin, and the same effect can be obtained as long as it is a material having elasticity or contractibility such as a sponge. Further, when it is not necessary to retighten the nut 80, the gap 60 may be filled with a soil cement or the like and sealed.

  According to the slope stabilization method described above, tension is applied to each continuous fiber band 11-18 using the push-in plate 40, and each continuous fiber band 11-11 wound around the outer periphery of the fixing member or the end member. The tightening of 18 is further strengthened, and it is avoided that an excessive shearing force is applied to each continuous fiber band 11-18. Therefore, according to the slope stabilization method of the present embodiment, the slope can be stabilized by applying tension to the continuous fiber bands 11 to 18 of the slope protector 10.

  FIG. 15 is a side view showing a state in which a flat plate is sandwiched between the crimping surfaces of the connector shown in FIGS. 1, 6, and 7.

  As shown in FIG. 15, the flat plate 90 is sandwiched between the crimping surfaces 3113 a and 3123 a of the end members 3113 and 3123 of the connection tool 31. Thus, since the intensity | strength of the edge part members 3113 and 3123 will increase when the flat plate 90 is inserted | pinched between the crimping | compression-bonding surfaces 3113a and 3123a, it becomes possible to make each continuous fiber band 11-18 tense still more strongly. Moreover, the intensity | strength can be adjusted by changing the thickness of the flat plate 90. FIG.

  In the present embodiment, an example in which a flat plate is sandwiched between the crimping surfaces of the connection tool has been described. However, the present invention is not limited to this, and the crimping surface of the continuous fiber band connector according to the present invention may be sandwiched.

10 Slope protector 11, 12, 13, 14, 15, 16, 17, 18 Continuous fiber band 18a, 16a End 14a, 15a, 12a, 13a Connection end 18b, 16b, 14b, 15b, 12b, 13b Adjacent Part 21, 22 end fixing tool 211, 212, 221, 222, 3111, 3112, 3121, 3122, 3211, 3212, 3221, 3222 half cylinder 211 a, 212 a, 221 a, 222 a, 3111 a, 3112 a, 3121 a, 3122 a, 3211a, 3212a, 3221a, 3222a Half face 213, 223 Fixing member 213a, 223a, 3113a, 3123a, 3213a, 3223a Crimp surface 213b, 223b, 3113b, 3123b, 3213b, 3223b Outer circumference 214, 224 Anchor bolt 2 5,225 Fixing body 216,226 Fixing bolt 31,32 Connector 3113,3123,3213,3223 End member 313,323 High tension bolt 40 Push plate 40a Raised portion 40b Through hole 50 Push plate formwork 50a Depression 60 Gap 70 Anchor bolt 80 Nut 90 Flat plate

Claims (6)

  The connection end of the continuous fiber band is sandwiched and clamped on the crimping surface of the end member that crimps the half split surfaces of the pair of half pillars together, and the adjacent portion of the connection end is the outer periphery of the end member A connecting device for continuous fiber bands, wherein two end members wound around are opposed to each other and the end members are connected to each other by a connecting member.   2. The continuous fiber band connector according to claim 1, wherein the connection member is connected in a direction orthogonal to a direction of tension acting on the continuous fiber band.   2. The continuous fiber band connector according to claim 1, wherein the connection member is connected in a direction parallel to a direction of tension acting on the continuous fiber band.   The continuous fiber band connector according to any one of claims 1 to 3, further comprising a flat plate sandwiched between the crimping surfaces. A plurality of continuous fiber bands connected to each other by the connector according to claim 1 and having a required length are arranged in a lattice pattern on the slope, and the ends of the continuous fiber bands are fixed to the ground and have a curved raised portion. A slope stabilization method characterized in that an intersection of the continuous fiber bands is pushed in the underground direction at the raised portion of the pushing plate, and tension is applied to the continuous fiber bands to be crimped to the slope. 6. The slope stabilization method according to claim 5 , wherein the pushing plate is made of high-strength fiber reinforced mortar .

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