JP2998063B2 - How to transport earth and sand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting earth and sand,
More specifically, soil with relatively high water content, such as silt-based soil and clay-based soil (hereinafter referred to collectively as "soil and sand")
And a method for transporting earth and sand by air.

[0002]

2. Description of the Related Art For example, there is a case where a greening zone is formed in an upper small step portion of a road in parallel with an operation of cutting a middle side of a mountain area to construct a road. When the ground in the greening zone is hard and unsuitable as a greening base, it is necessary to carry in hydrous soil such as silt-type soil and clay-type soil suitable for greening to form a guest soil layer. In general, a hose transport method is known as a method for carrying earth and sand into a small step portion of a slope where it is difficult to introduce a heavy machine such as a backhoe or a transport vehicle such as a dump truck. As a hose transport method, there are a method in which water is added to earth and sand to make a slurry and pumping is performed, and a method in which air is directly pumped without modifying the earth and sand.

[0003]

The above-mentioned technology for transporting soil and hose has the following problems. <B> In the method of transporting the sediment in the form of slurry, not only a large amount of water is required, but also excess water treatment after the transportation of the sediment is required. Not suitable for transport. There is also a problem that an additional facility for blocking and stopping slurry-like mud after transport is required. <B> In the method of directly transporting sediment by air, if the transported sediment is hydrous sediment, it easily adheres to the hose and becomes clogged, and is not suitable for transporting hydrous sediment containing a large amount of silt or clay. . Therefore, earth and sand that can be transported by air are limited to expensive washing sand, and material costs are high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a technique for transporting earth and sand that can be economically transported by preventing clogging in a hose when air and sand are transported. . It is a further object of the present invention to provide a technique for conveying earth and sand capable of conveying earth and sand (sandy soil) having a high silt and clay content, which is considered difficult to convey by air.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method for transporting earth and sand by feeding air from one direction into a transportation hose, wherein the earth and sand are conveyed prior to the earth and sand transport. A method for transporting earth and sand, comprising stirring and mixing, and then air-feeding a water-absorbing material having absorbed the water content of the earth and sand and an earth and sand having a reduced apparent moisture content through a transportation hose. Furthermore, the present invention provides a method for transporting earth and sand in which air is sent from an air pump into a transport hose to transport earth and sand,
Prior to the transport of sediment, the transported sediment, the water-absorbing material, and the fiber group are stirred and mixed, and thereafter, the water-absorbing material that has absorbed the moisture of the soil and the dispersed fiber and the sediment having a reduced apparent moisture content are air-fed through the transport hose. And a method for transporting earth and sand. Furthermore, the present invention provides a method for transporting earth and sand in which air is sent from an air pump into a transfer hose to transport earth and sand, wherein the earth and sand, the water absorbing material, the fiber group, and the solidifying agent are stirred and mixed prior to the earth and sand transportation. Characterized by air-pumping the water-absorbing material that has absorbed the water content of the earth and sand, and the dispersed fiber and the earth and sand whose apparent water content has decreased, through a transfer hose,
It is a method of transporting earth and sand. Furthermore, the present invention is a method for transporting earth and sand, wherein the above-mentioned water-absorbing material is a highly water-absorbing resin. Further, in the present invention, the fiber is a processed fiber,
Alternatively, it is a method for conveying earth and sand, which is a mixture of processed fibers and vegetable fibers.

[0006]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<A> Transport Facility FIG. 1 shows a conceptual diagram of the transport facility. Reference numeral 10 denotes a stirring tank.
A stirring blade 12 that rotates when driven by a motor 11 is provided. The stirring tank 10 can forcibly knead the earth and sand 20 and the water-absorbing material 21 which are fed by a belt conveyor, a shovel car, or the like. The mixing amount of the water absorbing material 21 is 2
It can be adjusted appropriately by opening and closing the adjusting valve 22 in accordance with the property of zero and the water content. Stirring tank 1
In the middle of the transfer hose 30 connected to the bottom of the compressor 33, a compressor 33 constituted by an air pump 31 and a motor 32 is provided.
Is inserted, and by blowing air into the transfer hose 30 through the compressor 33, the earth and sand 20 including the water-absorbing material 21 drawn out of the stirring tank 10 can be discharged from the spray nozzle 34 at the tip through the transfer hose 30. It has become. The air pump 31 is a known pump, and the transfer hose 30 is a known flexible hose or PVC pipe,
It includes steel pipes and the like.

<B> Water-absorbing material The water-absorbing material 21 is an additive added for the purpose of absorbing water to reduce the water content of the earth and sand 20, improve the apparent viscosity, and enable hose conveyance. Inorganic water-absorbent such as clay powder, and high water-absorbent resin having high water-absorbing performance can be used. As the water absorbing material 21, for example, vercurite, zeolite, silica, perlite, various burnt ash, stone powder, and the like can be used as inorganic materials. Examples of the superabsorbent resin include a crosslinked product of polyacrylate, a hydrolyzate of starch / acrylonitrile graft copolymer, (meth)
Crosslinked products of acryloyloxyethyltrialkylammonium salt, crosslinked products of (meth) acrylamidopropyltrialkylammonium salt, crosslinked products of polyacrylamido-2-methylpyrropansulfonic acid salt, and the like. As the water-absorbing material 21, zeolite as an inorganic material,
Silica, perlite, various roasted ash, and the like can be used.

[0009]

Next, a method for transporting earth and sand will be described. <B> Injection of earth and sand and water-absorbing material The earth and sand 20 and the water-absorbing material 21 corresponding to the input amount of the earth and sand 20 are injected into the stirring tank 10 in which the stirring blade 12 rotates.

<B> Primary mixing of soil and sand The water-absorbing material 21 stirred and mixed together with the soil 20 in the stirring tank 10 is pore water existing between the soil particles constituting the soil 20 and moisture adhering to the surface of the soil particles. Absorbs water and stores it inside without releasing the absorbed water. As a result, the apparent water content of the soil 20 decreases. Since the water absorbing material 21 does not exhibit adhesiveness even when absorbing water, there is no need to increase the viscosity of earth and sand.

<C> Conveying and Secondary Stirring of Sediment When most of the water content of the sediment 20 is absorbed by the water absorbing material 21 in the stirring tank 10, the compressor 33 is driven by the motor 32 and the conveying hose is directed toward the spray nozzle 34. The hopper at the bottom of the stirring tank 10 is opened at the same time as the air is supplied into the inside 30.
Then, the earth and sand 20 containing the water-absorbing material 21 mixed and stirred in the stirring tank 10 is drawn out by the negative pressure generated in the transfer hose 30, and further transferred through the transfer hose 30 by the air supply force of the compressor 33. You. During transportation, the sediment 20 is again mixed with the water-absorbing material 21 in the transport hose 30 to be mixed.
Apparent water content further decreases. The earth and sand 20 changes to a substantially dry state with a decrease in the water content, and is conveyed by air without closing the transfer hose 30.

<D> Discharge The earth and sand 20 transported by air in the transport hose 30 is discharged from the spray nozzle 34 together with the water absorbing material 21. The discharged water-absorbing material 21 finally functions as a water retention agent for the earth and sand 20 because it contains water. In the case where the earth and sand 20 conveyed by air is drastically scattered due to drying, the tip of the spray nozzle 34 may be discharged while adding water.

[0013]

[Embodiment 2] Although the embodiment has been described in which only the earth and sand 20 is transported, the earth and sand 20 may be mixed with vegetable fiber as a soil improving material. It is desirable to use bark compost, peat moss, or the like as the vegetable fiber. Further, processed fibers or a mixture of processed fibers and vegetable fibers may be used in the earth and sand 20.
Acrylic fibers having a length of about 5 to 50 mm and a fineness of 30 to 50 d can be used as the processed fibers, and bark compost or peat moss is preferably used as the vegetable fibers. In addition, about the processed fiber and the vegetable fiber which can be mixed in the above-mentioned earth and sand 20, for example, Japanese Patent Laid-Open No. 58-11072
It is disclosed in Japanese Patent Publication No. 2 and its detailed description is omitted.

[0014]

Embodiment 3 In addition to mixing vegetable fiber, which is a soil improvement material, into soil 20, an appropriate solidifying agent may be mixed. The solidifying agent is premixed with the soil improving material such as vegetable fiber and the like by stirring and mixing in advance, or it is mixed immediately before the nozzle is sprayed.

[0015]

Embodiment 4 The earth and sand 20 is not limited to silt-based or clay-based earth and sand, but includes any earth and sand.

[0016]

As described above, the present invention has the following effects. <A> After the water content of the earth and sand is reduced by stirring and mixing together with the water absorbing material, the air can be conveyed, and also the water absorbing material and the earth and sand can be stirred and mixed in the transfer hose to further reduce the water content of the earth and sand. Therefore, the earth and sand can be transported at low cost by avoiding blockage in the transport hose. <B> It has been considered that soil and sand having a high moisture content containing a large amount of silt and clay can not be conveyed by air. However, in the present invention, this kind of sediment can be conveyed by air. Therefore, unused construction materials, such as mountain sand and construction surplus soil, can be effectively used.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a method for transporting earth and sand according to the present invention.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yuji Nakano 4-35, Kudankita, Chiyoda-ku, Tokyo Light Industry Co., Ltd. (56) References JP-A-1-256425 (JP, A) JP-A Heisei 5-239848 (JP, A) JP-A-58-110722 (JP, A) JP-A-58-187485 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 7/00 E02F 7/10 B65G 53/30

Claims (5)

(57) [Claims] 1. A method for transporting earth and sand by feeding air from one direction into a transportation hose, wherein the earth and sand being transported and the water-absorbing material are stirred and mixed prior to the transportation of the earth and sand. A method for transporting earth and sand, comprising feeding air-absorbed water-absorbing material and earth and sand having a reduced apparent moisture content through a transportation hose. 2. A method for conveying earth and sand in which air is sent from an air pump into a conveyor hose to convey earth and sand, wherein the earth and sand, the water-absorbing material, and the fiber group are stirred and mixed before the earth and sand are conveyed. A method for transporting earth and sand, comprising: air-feeding a water-absorbing material that has absorbed water and soil and soil with reduced apparent moisture content and dispersed fibers through a transportation hose. 3. A method for transporting earth and sand by feeding air from an air pump into a transportation hose, wherein the earth and sand, the water-absorbing material, the fiber group, and the solidifying agent are stirred and mixed prior to the earth and sand transportation. A method for transporting earth and sand, comprising: thereafter, air-feeding a water-absorbing material that has absorbed the water content of the earth and sand, and a fiber and a dispersed fiber whose apparent water content has been reduced, through a transportation hose. 4. The method according to claim 1, wherein the water-absorbing material is a highly water-absorbing resin. 5. The method according to claim 1, wherein the fiber is a processed fiber or a mixture of a processed fiber and a vegetable fiber.