JPH04120315A - Spray method for material mixed with continuous lint - Google Patents

Abstract

PURPOSE:To prevent the run and fall of spray material for foundation stability such as mortar, concrete and planting earth by providing an anchor member projected from a slope surface, and causing the anchor member to catch a continuous lint mixed in the aforesaid spray material. CONSTITUTION:Anchor pins are erected on a natural ground G at intervals of approximately 20cm to 50cm. In this case, anchor pins having an expanded head should preferably be used. A spray material M such as mortar, concrete system material or planting earth is blown to the aforesaid ground G via a spray nozzle 1. Also, a continuous lint 5 such as polypropylene is jetted from the forward end of a hose 9 integrated with the jet nozzle 1, and made to be entrapped with the flow of the spray material M. In a spray process, a nozzle head position or a spray head direction is fixed, and a material projection position is so determined as to cause the spray material M to be caught with the anchor pins. According to the aforesaid construction, the spray material M and the natural ground G can be integrated with each other for preventing the run and fall thereof after application.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a method of spraying methods such as spray greening method and mortar spraying method, in which continuous long fibers are mixed in the spraying material. This invention relates to a material spraying method that improves the flow-off and falling properties of the sprayed material in the fiber-mixed spraying method.

[Conventional technology]

Traditionally, the spraying method used to protect and strengthen slopes was to use sprayed soil,
Spraying materials have been sprayed using mortar alone or with lath wire mesh laid on the slope, but this method has limitations in terms of strength. Washing away, collapse, and erosion of green infrastructure materials by running water were occurring.

In recent years, with the aim of improving and stabilizing slope strength,
As disclosed in Japanese Patent Publication No. 47602 and Japanese Patent Publication No. 129933, methods of mixing continuous long fibers or processed short fibers such as acrylic resin into the spraying material have been proposed and put into practical use. It is provided.

In particular, as mentioned above, it is economical to mix continuous long fibers into the sprayed material because it has a large outlet effect and can reduce the amount of mixed fibers, and it is also economical in terms of the required properties. It brings benefits such as a reduction in the amount of spraying, and its practical value is great.

In addition, various improvements have been attempted regarding the fiber feeding method in the above-mentioned continuous long fiber mixed spraying method.
No. 3, No. 2003-11102 discloses a continuous fiber pumping method that does not cause troubles such as cutting of fibers.

[Problem to be solved by the invention]

By mixing continuous long fibers into the sprayed material, the strength and toughness of the sprayed material was significantly increased compared to conventional spraying methods, and the effect of preventing flow holes and collapse after spraying was improved. For example, if the effect of integrating the sprayed material with the target ground is small, it is not possible to effectively prevent the sprayed material from slipping off. In fact, in some cases, such as when there is heavy rainfall, the paint may slip off over a fairly wide area after being sprayed.

Accordingly, the main object of the present invention is to provide a method of spraying a continuous long fiber-mixed material to further integrate the sprayed material with the ground.

[Means for solving the problem] The above problem can be solved by spraying ground stabilizing materials such as mortar, concrete, and soil for greening on the slope, and
In this continuous long fiber-mixing spraying method in which continuous long fibers are mixed into the sprayed material, a hooking member for the continuous long fibers that protrudes on the slope is provided, and for this hooking member,
This problem can be solved by spraying the spray material so as to hook the continuous long fibers.

[Effect]

In the present invention, first, a hooking member of continuous long fibers protruding onto a slope is provided, and material is sprayed onto the hooking member so as to hook the continuous long fibers. Therefore, the continuous long fibers mixed into the sprayed material are stubbornly intertwined with the hooking member provided protrudingly on the slope, so that they form an integral relationship with the ground via this hooking member. As a result, a stable slope is formed that does not easily slide down due to rain or the like.

[Specific structure of the invention]

Hereinafter, the present invention will be explained in detail based on examples.

First, with reference to FIG. 7, the method of incorporating continuous long fibers in the case of greening base material will be explained in detail.

1 is a spray nozzle and sprays raw material M. The mixture is fed from the stirrer 2A through the hose 3 by the pressure pump 2B, and is sprayed onto the target surface, such as the slope G, from the spray nozzle 1 at the tip.

On the other hand, continuous fibers 5 such as polypropylene are unwound from a wound cheese 6 wound into a cone shape,
The fibers are introduced into the pressure feeding device 10 through the ring guide 7 and the reel 8, and are jetted out from the tip of the fiber pressure feeding hose 9 as a hollow pressure feeding path by compressed air by the compressor 4B. The tip of the hose 9 is integrated with the spray nozzle I by a stopper 11, and the spray direction of the hose 9 is arranged to intersect with the spray direction of the spray material M from the spray nozzle 1. .

In a preferred embodiment, a plurality of cheeses 6 are prepared, and the continuous fibers 5 from each cheese 6, 6, . In addition, the rotation axis of the reel 8 is connected to a pulse generator I2, etc., and by counting the number of pulses, based on the known reel diameter,
The running speed of the continuous fibers 5, and therefore the ejection amount of the continuous fibers 5, is detected and the ejection amount is controlled. This ejection amount can be controlled by, for example, adjusting the air flow rate from the compressor 5B with the flow rate control valve 13, or adjusting the pressure of the compressor 5B itself.
This can be done by adjusting the fiber supply speed using brakes (not shown) provided at appropriate positions from the continuous fibers 5 to the pressure feeding device 10.

In addition, the detected running speed of the fibers 5 can be effectively used to adjust the amount of fibers mixed in the spray material actually sprayed onto the slope G by adjusting the spray amount of the spray material M based on this. I can do it.

Note that the pressure feeding device 10 is disclosed in Japanese Patent Application Laid-Open No. 55-167.
The pressure feeding device disclosed in Japanese Patent Application No. 170, Japanese Patent Application No. 1-235275, etc. can be used.

The continuous fibers 5 fed by the pressure feeding device 10 are ejected from the tip of the hose 9. The ejected fibers 5 are eventually drawn into and entrained in the flow of the spray material M ejected from the spray nozzle 1, and are sprayed onto the target slope G. As a result, a slope stabilizing layer in which the continuous fibers 5 are randomly mixed is formed on the slope G.

For fine adjustment of the spouting state of the spraying material M, for example, as shown in FIG.
This can be done by Only the tip of the spray nozzle 1 is a rubber nozzle IA, and a ring 31 is attached around it.
is fixed, clamping plates 32 and 33 are pivotally attached to this ring 31, and a main body handle 34 is fixed to the lower pivoting plate 33.
A rotary plate 35 is rotatably attached to the main body handle 34 by a pin 36, and the other end of the rotary plate 35 and the upper clamping plate 33
and are connected by a connecting rod 37. 38 is a rotating plate 35
It is an integrated operation handle.

When adjusting, if the operating handle 38 is pulled in the X direction with respect to the main body handle 34, the rotary plate 35 will align with the pin 3.
6, so the upper clamping plate 32 is attached to the pin 3.
9, the spacing between the tips of the clamping plates 32 and 33 is pinched, and as a result, the tip of the rubber nozzle IA is constricted, and the sprayed material scatters in a fan shape and flies far. Conversely, if the space between the handles 34 and 38 is expanded, that is, the handle 38
By loosening the grip, the spray material M will be ejected in a cylindrical shape that will fly far away.

As the continuous fiber, preferably a bulky textured yarn is used. The materials include polyester, polyamide, acrylic, polyvinyl alcohol (including acetal), polypropylene, polyethylene, polyvinyl chloride,
Examples include resins of various series such as polyvinylidene chloride and acetate. It is also effective to use conjugate yarns, especially bonded yarns. When this type of bulky yarn is used, when the fibers are fed under pressure, the area of friction with the compressed air increases, and the conveyance property is further improved.Furthermore, the fibers tend to come apart after being sprayed, and the adhesion to the spraying material is also increased. The number of crimps for bulky yarn is JISLol, 5, 25m.
It is preferably 50 to 9,000, particularly 100 to 3,000.

Furthermore, when creating a greening base, spun yarn made of single fibers can be used. As a component of this spun yarn, super absorbent fibers such as "Lanseal" (trademark) manufactured by Toyobo Co., Ltd. can also be used in part. This combination can be achieved by preparing the above-mentioned winding cheese 6 for the required number of spun yarns and bundling them with other processed yarns. On the other hand, it is also possible to bundle the processed yarn with continuous metal fibers.

Furthermore, it is also possible to use a fiber in which a fiber material with high strength is provided inside and a fiber material with low strength is provided concentrically with the outside.

As the bulky processed yarn or spun yarn, rather than using a single fiber with a thick total denier, it is better to bundle and spray about 2 to 40 fibers with a total denier of 50 to 1000 d (denier) and spray them more uniformly on the sprayed target surface. It is preferable because it is dispersed in the substrate and has excellent stability of the base. When bundling, it can be converged by the ring guide 7 as in the above example.

On the other hand, it is possible to force-feed only one fiber with a thin total denier, but this tends to cause breakage when conveyed through a hose, whereas bundling increases the overall strength.
In addition, compared to using a single fiber with a thick total denier, each bundled fiber breaks apart and disperses when sprayed, resulting in more dispersion per unit area and less adhesion with other sprayed materials. The properties become better.

On the other hand, when considering actual construction on a slope, the maximum length from the pumping plant is 100 m and the height is 30 m. It is therefore important that the continuous fibers are conveyed through the hose 9 without resistance. Although it is possible to use a plastic hose as the hose 9 for this purpose, it has been found that this type of plastic hose generates static electricity and that fibers become clogged in the hose. On the other hand, in the case of rubber hoses, especially hydraulic rubber hoses with smooth inner surfaces, it has been found that smooth transportation is possible without clogging due to static electricity. The inner diameter of the hose is 15~
30 stops is preferable.

When fibers need to be pumped to high places or long distances,
As shown in FIG. 9, one or more pressure feeding devices 1 are installed in the middle of the hose 9.
Adding 0 makes it possible to transport fibers over long distances.

By the way, the pressure of the compressed air is preferably 2 to 15 kg/d, and the flow rate is preferably 0.3 to 51/min.

In the above example, the spraying material and the continuous fibers are conveyed separately because they are mainly intended for spraying greening base materials, but in the case of mortar-based materials, the conveyance route is For example, a Y-shaped pipe 14 may be provided at the base of the spray nozzle 1 in the middle of the process, and the spray can be carried out together there and sprayed. In FIG. 9, I is a spraying machine, and 4A is a pressure-feeding compressor.

The spraying materials used in the present invention include mortar or concrete-based materials, slurry-like greening base materials containing natural organic fibers (peat moss, park compost, etc.), or mud-like greening base materials containing black wood, water purification cake, and the like.

In the above-described detailed continuous fiber mixing method, when spraying the spraying material, first, as shown in FIG. 1, the anchor pin 15. 15... will be erected. The arrangement interval of the anchor pins 15 is preferably 20 to 50 cm.
It is assumed that m.

Further, the shape of the anchor pin 15 may be a rod-like one without a head, or as shown in FIGS. 2 and 3, an anchor pin 15A having an enlarged head portion.
, 15B may be used. Further, in order to ensure adhesion strength with the sprayed material, the head of the anchor pin may be bent into a U-shape, and as shown in FIG.
In order to enhance the effect of preventing drift and collapse, a flat bar 15a or the like may be welded to the rod-shaped anchor pin I5.

As described above, once the anchor pin 15 has been installed on the ground G, when spraying is started from the anchor pin 15, as shown in FIG. The material is sprayed toward the anchor pin 5□ adjacent to the pin 15+, and after going around this anchor pin 152, the material is sprayed onto the next anchor pin 153 so that the continuous long fibers mixed in the sprayed material are entwined with the anchor pin 15. conduct. By wrapping the material projection position around the anchor pin 15 in this manner, the continuous long fibers mixed in the sprayed material are reliably entwined with the anchor pin, and the sprayed material and the ground G are finally integrated. be able to.

When spraying the material, the nozzle head position may be fixed and the material projection position may be changed depending on the change in the injection direction, or the nozzle head injection direction may be fixed and the material projection position may be changed by moving the nozzle head. You can also change the .

Further, the material spraying can be carried out manually, or, for example, by using a spraying vehicle that can move freely on a slope in the XY direction.
Alternatively, the material can be sprayed by a mechanical method such as controlling the movement of a spraying means such as a spraying arm extending from a spraying device installed outside the slope.

In addition, although the case of the anchor bin type has been described in detail above, for example, a lath wire mesh is laid on a slope, a coil is attached to the lath wire mesh, and a nozzle jet is used to hook continuous long fibers onto the coil. A similar effect can be obtained by running the direction.

Furthermore, wires having protrusions, such as barbed wire, may be laid on the slope in the form of a grid, and then sprayed.

〔Effect of the invention〕

As described in detail above, according to the present invention, the sprayed material and the ground can be more integrated, and the washing away and collapse after spraying can be effectively prevented.

[Brief explanation of the drawing]

Figure 1 is a diagram of the slope condition after spraying by the method of the present invention, Figures 2-
Figure 4 is a diagram showing a modified example of the anchor pin installed on the slope, Figure 5 is a diagram showing the procedure for projecting the sprayed material onto the slope, and Figure 6 is a diagram showing the procedure for projecting the sprayed material onto the slope.
The figure is a diagram for explaining the continuous long fiber mixed spraying method according to the method of the present invention, and FIG. 7 is a perspective view of an example of a material injection situation adjustment device.
FIG. 8 is a diagram showing another example of the continuous long fiber mixed spraying method. 1... Spray nozzle, 3.9... Hose, 4A, 4B
...Compressor 5...Continuous long fiber, 6...
Cheese, 7... Link guide, 10... Pressure feeding device,
15... Anchor pin patent applicant Wright Kogyo Co., Ltd. Mitsubishi Rayon Engineering Co., Ltd.

Claims (1)

[Claims] (1) In the continuous long fiber spraying method, in which a sprayed material for ground stabilization such as mortar, concrete, and soil for greening is sprayed onto the slope, and continuous long fibers are mixed into the sprayed material, A method for spraying a continuous long fiber-containing material, characterized in that a hooking member for the continuous long fibers is provided that protrudes from the surface, and the spraying material is sprayed so as to hook the continuous long fibers onto the hooking member. .