JP2005256383A - Continuous fiber-reinforced earth method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous fiber-reinforced earth method, which is carried out by supplying yarn formed of continuous fibers from a bobbin housed in a yarn supply device, ejecting the supplied yarn from an ejection nozzle of an ejector by using high-pressure water or compressed air, conveying sand to an ejection destination of the fibers, and directly ejecting the sand together with the yarn or mixing the yarn with the sand, wherein the reinforced earth method by using continuous fibers positively and efficiently achieves prevention of entanglement of the yarn even if the yarn supply device is separated a long distance from the ejector, and elimination of hindrance due to wind etc. during execution of the method. <P>SOLUTION: The continuous fiber-reinforced earth method is characterized by provision of a feed roller 32 for forcedly feeding the yarn 4 by pinching or winding the yarn, at a location between the yarn supply device 3 and the ejection nozzle 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a continuous fiber reinforced earth method for spraying a plurality of continuous fibers and sand to a construction site to be reinforced as applicable to slope protection, retaining wall construction, and greening method.

  A reinforced earthwork method using continuous fibers will be described with reference to FIG. A yarn supply device 3 having a guide stay 2 for storing a yarn spool 1 of a continuous fiber and feeding a yarn 4 from the yarn winding 1, and a high-pressure pump for feeding the yarn 4 fed out from the yarn supply device 3 from a water tank 7 The sand is composed of a fiber disposing device comprising an ejector 6 ejected from an ejection nozzle 5 using high-pressure water fed by a supply pipe 9 through 8, and a sprayer 12 having a belt conveyor 10 and a material hose 11. Combine feeding devices. In the figure, 13 is a compressor for supplying compressed air to the sprayer 12, 14 is a generator that serves as a power source for the high-pressure pump 8, 15 is a sand meter, 16 is an electric hose reel of a flexible supply pipe 9, Reference numeral 17 denotes a distribution board.

  In the ejector 6, the yarn 4 is inserted into the injection nozzle 5. When pressurized water is discharged from the injection nozzle 5, the yarn 4 is also injected from the injection nozzle 5. On the other hand, the sand is conveyed to the ejection destination of the yarn 4 by the belt conveyor 10 and the material hose 11, and directly injected and mixed with the yarn 4.

  In this way, the continuous fiber (multifilament untwisted yarn) of about 0.15 to 0.2% (dry weight ratio) of the sand used is jetted together with jet water and mixed with the sand three-dimensionally to shear. Strength can be increased and more stable and strong earth structures can be constructed.

  In addition to road retaining walls and embankments, it is widely applicable to slope protection, embankment foundations on soft ground, earthquake and seismic foundations, protection of structures against impacts, filter layers of dams, etc.

  In the reinforced earth method using continuous fibers shown in FIG. 14, the yarn 4 between the guide stay 2 and the ejector 6 of the yarn supply device 3 is easily affected by wind, and 15 m or more is taken into consideration that the yarns 4 are entangled. Can't work away. Further, if the distance is 50 m or more, the supply of yarn is insufficient, and the construction efficiency is lowered. As a result, the yarn supplying device 3 must always be arranged near the ejector 6, and the mobility is impaired.

  On the other hand, the applicant previously filed the following patent application.

Japanese Patent Application No. 2000-272855 (Japanese Patent Laid-Open No. 2002-81072)

  In this application, as shown in FIG. 13, a continuous fiber yarn 4 is fed from a spool 1 stored in a yarn supply device 3, and the fed yarn 4 is fed into the ejector 6 using high-pressure water or compressed air. In the reinforced earth method using continuous fibers that are sprayed from the spray nozzle 5 and transported to the fiber spray destination, and directly sprayed and mixed with the yarn 4 (see FIG. 8), the yarn feeder 3 and spray Struts 24 provided with guide rings 23 through which the threads 4 pass between the nozzles 5 are arranged at appropriate intervals, and the guide rings 23 guide the threads 4 between the thread supply device 3 and the injection nozzle 5; and A steel wire provided with a guide ring through which the yarn 4 is inserted is stretched between the yarn supply device 3 and the injection nozzle 5, and the yarn supply device 3 and the injection nozzle 5 are guided by the guide ring along the steel wire. The content is to guide the thread 4 between It is.

  The yarn supply device 3 includes a single guide stay 2 that entangles and feeds yarns 4 from a plurality of bobbin windings 1 as a unit of yarn supply device 3, and a plurality of divided yarn supply devices 3 are provided. The platform was placed on the same cart 18. The guide stay 2 is telescopic and can be extended and retracted in multiple stages, and its pivotable base is covered with a bellows-type elastic cover 19 so that sand or the like does not enter. Further, the carriage 18 is provided with a load cell 20 in order to measure the remaining amount of the thread 4 in the bobbin 1.

  On the other hand, the ejector 6 is provided with a plurality of injection nozzles 5 in one header 21, and the extended portion of the high-pressure water supply pipe 9 is connected with a portion divided into two forks 22. Further, one or a plurality of support columns 24 provided with a plurality of guide rings 23 through which the yarn 4 is inserted are arranged between the guide stay 2 of the yarn supply device 3 and the ejector 6.

  As a result, the yarn 4 can be prevented from being entangled even when the distance between the yarn supply device 3 and the ejector 6 is long, and the construction can be prevented from being hindered by the influence of wind or the like.

  According to the reinforced earth method using continuous fibers in Patent Document 1, struts provided with guide rings are arranged at appropriate intervals to maintain a state in which the yarn is stretched. However, if this interval is wide, the yarn is also loosened. In addition, the presence of the support itself becomes an obstacle at a narrow interval. Furthermore, if a steel wire provided with a guide ring through which the yarn is inserted is stretched and the yarn is guided along the steel wire, the presence of the steel wire also becomes an obstacle.

  An object of the present invention is to eliminate the disadvantages of the conventional example, and to feed a continuous fiber yarn from a spool wound in a yarn supply device, and use the high-pressure water or compressed air to feed the fed yarn to an ejection nozzle of an ejector. In the continuous fiber reinforced earth method, in which sand is transported to the fiber injection destination and directly injected and mixed with the yarn, the yarn is prevented from getting tangled even if the distance between the yarn supply device and the ejector is long. Another object of the present invention is to provide a continuous fiber reinforced earth method that can be reliably and efficiently carried out so as not to hinder construction due to the influence of wind or the like.

  In order to achieve the above object, the present invention as set forth in claim 1 feeds a continuous fiber yarn from a spool wound in a yarn supply device, and ejects the fed yarn using high-pressure water or compressed air. In a continuous fiber reinforced earth method, in which sand is transported to the spray destination of the fiber and directly sprayed and mixed with the thread, the thread is sandwiched or wound between the thread supply device and the spray nozzle. The gist of the invention is that a feed roller forcibly feeding is provided.

  According to the first aspect of the present invention, the yarn fed out from the yarn feeding device is pulled out and fed by the feed roller, so that it can be kept in a tension-free state, can be sent for a long distance, and the yarn can be tangled. It can be prevented, and the construction is not hindered by the influence of wind or the like.

  The gist of the present invention described in claim 2 is that the feed roller is a capstan around which a plurality of yarns are wound, and a non-torque roller connected to the plurality is arranged around the feed roller.

  According to the second aspect of the present invention, a plurality of yarns can be collected and fed out by a single feed roller (capstan), and the apparatus can be made compact, and a plurality of injection nozzles can be provided in one header. Smooth feeding of yarn to the ejector provided with The non-torque roller can smoothly guide to or from the feed roller (capstan) without applying tension to the yarn.

  The gist of the present invention described in claim 3 is that the yarn coming out from the feed roller is provided with a safety switch for detecting the yarn tension and stopping the operation when the yarn tension is lost. is there.

  According to the third aspect of the present invention, when the yarn coming out of the feed roller and reaching the ejector is cut, the safety switch detects this and the operation of the feed roller can be stopped immediately. As a result, entanglement of the yarn can be prevented.

  As described above, in the reinforced earth method using continuous fibers of the present invention, continuous fiber yarn is fed out from a spool wound in a yarn supply device, and the fed yarn is fed into the ejector using high-pressure water or compressed air. In a continuous fiber reinforced earth construction method, in which sand is transported to the spray destination of the fiber, and directly sprayed and mixed with the yarn, the yarn is entangled even at a long distance between the yarn feeder and the ejector. It can be performed reliably and efficiently in order to prevent and prevent the construction from being hindered by the influence of wind or the like.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is an explanatory view showing an embodiment of the continuous fiber reinforced earth method according to the present invention, and shows only the fiber disposing apparatus. The entire apparatus is as described in FIG. Naturally, a sand supply device for conveying the sand to the jetting destination is also used.

  The fiber disposing device includes a yarn supplying device 3 for storing the bobbin 1 of the continuous fiber yarn 4, and an ejector 6 for injecting the yarn 4 fed from the yarn supplying device 3 from an injection nozzle 5 using high-pressure water. Is the same as the conventional example, and the injection nozzle 5 uses the high-pressure water fed from the water tank 7 through the high-pressure pump 8 through the supply pipe 9 to the yarn 4 fed from the yarn supply device 3. Inject from.

  As conventionally known, the sand supply device 25 includes a measuring device 15 linked to the hopper 26 by the belt conveyor 10 and a sprayer 12 connected to the measuring device 15 via the belt conveyor 10. In the figure, reference numeral 27 denotes a tractor excavator for conveying sand from a sand pile, and 13 denotes a compressor for supplying compressed air to the sprayer 12. Reference numeral 14 denotes a generator serving as a power source for the measuring instrument 15 and the like.

  Although not shown in the drawings, the yarn supply device 3 feeds the yarn 4 from a plurality of (for example, four) bobbins (bobbins) through a tensor, a dock tail guide, and the like. The yarn 4 is supplied from the nozzle 5 to the ejector 6 to be jetted.

  In addition, the support | pillar 24 which provided the guide ring which the thread | yarn 4 penetrates between the thread | yarn supply apparatus 3 and the injection nozzle 5 is arrange | positioned suitably, and this thread | yarn between the thread supply apparatus 3 and the injection nozzle 5 is arrange | positioned. 4 may be induced.

  Further, a steel wire provided with a guide ring through which the yarn 4 is inserted is stretched between the yarn supply device 3 and the injection nozzle 5, and the yarn supply device 3 and the injection nozzle are attached to the steel wire by the guide ring. It is also possible to guide the thread 4 between the five.

  In the present invention, the yarn 4 is provided between the yarn supply device 3 for storing the spool 1 of the continuous fiber yarn 4 and the ejector 6 for injecting the yarn 4 from the injection nozzle 5 using high-pressure water. A feed roller (capstan) 32 forcibly sending out by pinching or winding was provided.

  2 to 5 show an example of the feed roller 32. A feed roller (capstan) 32 is provided outside a box 34 having a built-in electric motor, and an appropriate number of non-torque rollers 35 are arranged around the yarn. 4 was wound around a feed roller (capstan) 32.

  In the illustrated example, the non-torque rollers 35 are arranged in four in accordance with the number of the yarns 4, and three of the non-torque rollers 35 are inserted into the feed roller (capstan) 32 of the yarn 4 from the feed roller (capstan) 32. Is provided on the extended side and on the extended side.

  The feed roller (capstan) 32 is provided with a stopper detection plate 36 by a limit switch so that it can be detected as soon as it stops.

  In the figure, 37 is a timer, 38 is a leakage breaker, 39 is a rotary speed adjusting knob by a variable resistor, 40 is an operation switch, and 41a, 41b and 41c are receptacles.

  In addition, a handle 42 is attached to the upper surface of the box 34, and legs 43 using engineering plastic leveling pads are provided on the lower surface.

  In this way, in the yarn supply device 3, four yarns 4 as continuous fibers (untwisted yarn) fed from the bobbin are sent by the feed roller (capstan) 32, and the ejector 6 is inserted into the injection nozzle 5. Is done.

  The yarn 4 is pulled by the ejector 6 and is sequentially fed out from the yarn supply device 3, and feed of a feed roller (capstan) 32 is added thereto.

  In the ejector 6, when high-pressure water sent from the water tank 7 through the high-pressure pump 8 through the supply pipe 9 is injected from the injection nozzle 5, the yarn 4 is also discharged and directly injected and mixed with sand.

  As shown in FIGS. 6 and 7, the feed roller (capstan) 32 is installed on a base 44 and the tension of the yarn is detected on the same base 44, and the operation is performed when the tension of the yarn disappears. A safety stopper 45 is provided to stop the operation.

  The safety stopper 45 uses a limit switch combined with a relay and has a push switch 46 for operation.

  The yarn 4 is fed out from the feed roller (capstan) 32 and stretched in the direction of the ejector 6. In this state, the safety stopper 45 contacts the yarn 4 and detects the tension.

  Then, when the unwinding state is poor and the thread 4 is slackened or the thread 4 is cut, the tension is lost, so the safety stopper 45 detects this, and the feed roller (capstan) 32 rotates via the relay. To stop.

  FIG. 9 shows another embodiment of the present invention. As a configuration of the yarn supply device, a single guide stay 2 that entangles and feeds yarns 4 from a plurality of (four in the illustrated example) spools 1 is sent. The portable bobbin case 29 having one unit is set as a single unit, and a plurality of units (four in the illustrated example) are arranged alone.

  The bobbin case 29 is a combination of a base 30 and a support frame 31. The support frame 31 is formed by raising the lower part of four frames whose upper parts are curved in an arc shape from the four corners of the base 30. Is formed in a birdcage shape and covered with a cover.

  As in the first embodiment, the yarn 4 is placed between the yarn supply device 3 for storing the bobbin 1 of the continuous fiber yarn 4 and the ejector 6 for injecting the yarn 4 from the injection nozzle 5 using high-pressure water. A feed roller (capstan) 32 that forcibly feeds them by sandwiching them between each other was provided. The feed roller (capstan) 32 may be one that winds and feeds the yarn 4 as in the first embodiment.

  9 to 11, a feed roller (capstan) 32 is provided for each yarn supply device 3, and in the example of FIG. 10, a plurality of feed rollers (capstan) 32 are further provided as one unit. Although it has been shown that the feed roller (capstan) 32 may be provided, as shown in FIG. 12 as in the first embodiment, one feed roller (capstan) is provided for a plurality of yarn supply devices 3. ) 32 may be provided in common. In the figure, 17 indicates a distribution board.

  Further, as the yarn supply device 3, a single guide stay 2 that feeds the yarn 4 from a plurality of spools 1 entangled as disclosed in Japanese Patent Application No. 2000-272855 (Japanese Patent Laid-Open No. 2002-81072) is provided. It is also possible to use a single yarn supply device 3 as a unit and place a plurality of divided yarn supply devices 3 on the same carriage 18.

It is explanatory drawing which shows 1st Embodiment of the continuous fiber reinforcement earthwork method of this invention. It is a front view of a feed roller (capstan). It is a top view of a feed roller (capstan). It is a left view of a feed roller (capstan). It is a right view of a feed roller (capstan). It is a top view of a feed roller (capstan) installation stand. It is a side view of a feed roller (capstan) installation stand. It is a side view of a safety switch. It is explanatory drawing which shows 2nd Embodiment of the continuous fiber reinforcement earthwork method of this invention. It is explanatory drawing which shows 3rd Embodiment of the continuous fiber reinforcement earthwork method of this invention. It is explanatory drawing which shows the whole 2nd Embodiment of the continuous fiber reinforcement earthwork method of this invention. It is explanatory drawing which shows 4th Embodiment of the continuous fiber reinforcement earthwork method of this invention. It is a perspective view which shows a prior art example. It is explanatory drawing which shows the outline | summary of the continuous fiber reinforcement earth method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bobbin 2 ... Guide stay 3 ... Yarn supply device 4 ... Yarn 5 ... Injection nozzle 6 ... Ejector 7 ... Water tank 8 ... High pressure pump 9 ... Supply pipe 10 ... Belt conveyor 11 ... Material hose 12 ... Spraying machine 13 ... Compressor DESCRIPTION OF SYMBOLS 14 ... Generator 15 ... Metering device 16 ... Electric hall reel 17 ... Distribution board 18 ... Dolly 19 ... Telescopic cover 20 ... Load cell 21 ... Header 22 ... Fork 23 ... Guide ring 24 ... Post 25 ... Sand supply device 26 ... Hopper 27 ... tractor excavator 28 ... sand pile 29 ... bobbin case 30 ... base 31 ... support frame 32 ... feed roller 33 ... metering device 34 ... box 35 ... non-torque roller 36 ... stopper detection plate 37 ... timer 38 ... electric leakage breaker 39 ... Rotation speed adjustment knob 40 ... Operation switches 41a, 41b, 41c ... Receptacle 42 ... Propeller 43 ... Leg 44 ... Stand 45 ... Safety stopper 46 ... Push switch

Claims (3)

  The yarn of the continuous fiber is fed out from the spool wound in the yarn feeding device, and the fed yarn is jetted from the jet nozzle of the ejector using high-pressure water or compressed air, while the sand is fed to the jet destination of the fiber. In the continuous fiber reinforced earth method for conveying, directly jetting and mixing with the yarn, a feed roller is provided that forcibly feeds the yarn by sandwiching or winding the yarn between the yarn supply device and the injection nozzle. Continuous fiber reinforced earth method.   The continuous fiber reinforced earth method according to claim 1, wherein the feed roller is a capstan for winding a plurality of yarns, and a non-torque roller connected to the plurality of cap rollers is disposed around the feed roller.   The continuous fiber reinforced earth method according to claim 1 or 2, further comprising a safety switch that detects the tension of the yarn from the feed roller and stops operation when the tension of the yarn is lost.

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