JP5272839B2 - Bentonite laying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for constructing a water shutting-off layer inexpensively in a short period of time and to provide a bentonite spreading machine used in the construction method. <P>SOLUTION: This bentonite spreading machine 1 is provided with a scattering device 6 for scattering bentonite 2 over the ground surface, a water adding device 8 for supplying water to the bentonite 2, and a stirring device 9 for stirring the bentonite 2. In this construction method for the water shutting-off layer, the bentonite 2 in a dry condition is carried into a planned construction site for the water shutting-off layer and is directly charged into a hopper 4 of the bentonite spreading machine 1. The bentonite 2 is scattered over the ground surface 5 by the predetermined thickness while letting the bentonite spreading machine 1 run. Water is sprayed on the bentonite 2 scattered on the ground surface 5 through a nozzle 8b to make it wet. Furthermore, the bentonite 2 in a wet condition is stirred by a screw 9a to make content of water included in the bentonite 2 uniform. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a bentonite-laying machine used to construct construction method of water shield layer by bentonite or bentonite mixed soil.

  When building a water barrier layer with bentonite or bentonite mixed soil, first put dry bentonite etc. into a water mixer at a factory etc. and mix with water to make it wet, and then wet this bentonite etc. Is carried to the site by truck and unloaded to a predetermined place by an unloader. As the hydration mixer, for example, Patent Document 1 further stirs an empty kneading part for kneading bentonite or the like, a water adding part for adding water to bentonite or the like after kneading, and bentonite or the like to which water has been added. The thing provided with the kneading part to be disclosed is disclosed. This water-mixing machine produces wet bentonite and the like while preventing the kneading and agglomeration of bentonite and the like by adding air kneading and stirring after adding water. In addition, as a brewing machine for brewing wet bentonite and the like, for example, Patent Document 2 discloses a method using a finisher used when laying asphalt. In this method, wet bentonite or the like is loaded on a hopper provided at the front part of the finisher, and the bentonite or the like is transported to a brewing part provided at the rear part of the finisher by a belt conveyor. Crawl on.

JP-A-10-100132 JP 2000-328544 A

  However, since the hydration mixer described in Patent Document 1 performs empty kneading, hydration, and stirring with one unit, it takes a long time to produce wet bentonite and the like, and the production capacity is low. In addition, it is very expensive, and in the case of a new installation, capital investment is required. Furthermore, since bentonite having a particle size larger than 10 mm cannot be processed, it is necessary to screen the bentonite or the like before adding it to the hydration mixer to adjust the particle size to 10 mm or less, which is troublesome.

  In addition, in the bentonite laying method described in Patent Document 2, wet bentonite and the like loaded on the hopper may be agglomerated by their own weight to form a lump and block the entrance of the belt conveyor. On the other hand, when bentonite or the like is supplied to the hopper little by little so that the bentonite or the like does not become a lump, the laying operation cannot be performed while the bentonite is being supplied, resulting in a reduction in work efficiency. Further, since bentonite and the like in a wet state are likely to adhere to the finisher, maintenance must be performed frequently.

  Further, when the bentonite or the like produced in the water mixer is transported to the finisher by a truck or the like, it is aggregated by its own weight, so that it is difficult to transport in large quantities.

The present invention has been made in view of the conventional problems as described above, in a short period of time, and to provide a bentonite-laying machine used in the construction method can be built inexpensively bentonite impermeable layer It is the purpose.

  In the present invention, a self-propelled bentonite laying machine for laying bentonite or bentonite mixed soil at a planned construction site of a water-impervious layer includes a brewing device for brewing dried bentonite or bentonite mixed soil at the planned planned site; A water supply device for supplying water to the bentonite or the bentonite mixed soil brewed from the brewing device, and a stirring device for stirring the bentonite or the bentonite mixed soil hydrated by the water adding device. It is characterized by.

  According to the present invention, the extraction of bentonite and the like, the supply of water to the bentonite and the like, and the stirring of the bentonite and the like can all be carried out by a bentonite laying machine capable of self-propelled. Moreover, since these operations are continuously performed at the construction site where the water shielding layer is to be constructed, the bentonite in a wet state can be laid in a wide range in a short period of time.

  Further, in the present invention, the water adding device includes a tank for storing water, a nozzle for spraying water into the bentonite or the bentonite mixed soil, and water discharge according to a traveling speed of the bentonite laying machine. If it is provided with a variable pump whose amount can be adjusted, for a bentonite that has been squeezed regardless of the running speed of the bentonite laying machine, for example, a predetermined value determined in advance by design or the like per unit area Of water can be supplied. Thereby, the moisture content contained in bentonite etc. can be made uniform. Therefore, it is possible to construct a water shielding layer having substantially uniform water permeability.

  According to the present invention, it is possible to construct a bentonite impermeable layer in a short time and at a low cost.

It is a side view of the bentonite laying machine concerning a first embodiment of the present invention. It is a figure which shows the construction procedure which lays bentonite. It is a figure which shows the construction procedure which lays bentonite. It is a figure which shows the other Example of 1st embodiment of this invention. It is a side view of the bentonite laying machine which concerns on 2nd embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of a bentonite laying machine 1 according to the first embodiment of the present invention.
As shown in FIG. 1, the bentonite laying machine 1 includes a vehicle body 3, a hopper 4 for loading the bentonite 2, a brewing device 6 for brewing the bentonite 2 on the ground 5, and brewing the bentonite 2 in the hopper 4. A belt conveyor 7 for conveying to the device 6, a water adding device 8 for supplying water to the bentonite 2 squeezed on the ground 5, and a stirring device 9 for stirring the watered bentonite 2 are provided. By moving the bentonite laying machine 1 forward, the bentonite 2 can be continuously laid behind the bentonite laying machine 1.

A driver's seat 10 is provided on the vehicle body 3, and a person can get on and operate the bentonite laying machine 1. The vehicle body 3 is loaded with an engine and a device such as a hydraulic pump driven by the engine (not shown) and is capable of self-propelling.
The hopper 4 is provided in the front part of the vehicle body 3 and can load a large amount of bentonite 2.

  The brewing device 6 is provided at the rear of the vehicle body 3 and brews the bentonite 2 conveyed by the belt conveyor 7 to the ground surface 5 with a predetermined thickness. Water is supplied to the bentonite 2 brewed on the ground 5 by the brewing device 6 by the water adding device 8 to make the bentonite 2 wet.

  The water adding device 8 has a tank 8a for storing water, a plurality of nozzles 8b for water spraying, a variable pump 8c for supplying water in the tank 8a to the nozzle 8b, and a discharge from the variable pump 8c. And a hose 8d for feeding the water to be supplied to the nozzle 8b.

  The tank 8 a and the variable pump 8 c are installed in the vehicle body 3, and the nozzle 8 b is attached to the front part of a cover 9 b (described later) of the stirring device 9.

  The variable pump 8c can adjust the discharge amount of water. When the traveling speed of the bentonite laying machine 1 is fast, the discharge amount is increased, and when the traveling speed is slow, the discharge amount is decreased. Thereby, for example, per unit area, a predetermined volume of water determined in advance by design or the like can be supplied to the brewed bentonite 2.

  The stirring device 9 is provided behind the brewing device 6 and includes a screw 9a for stirring the wet bentonite 2 hydrated by the hydrating device 8 and a cover 9b surrounding the screw 9a. In order to make the amount of water contained in bentonite 2 uniform, stirring is performed with the screw 9a.

  Next, a method for laying bentonite 2 using the bentonite laying machine 1 having the above-described configuration will be described according to a construction procedure.

2 and 3 are diagrams showing a construction procedure for laying the bentonite 2.
As shown in FIG. 2, the bentonite 2 in a dry state is carried into a site where a water shielding layer is to be constructed by a truck 13 or the like, and directly put into a hopper 4 of the bentonite laying machine 1.

  Next, as shown in FIG. 3, while the bentonite laying machine 1 is running, the bentonite 2 is brewed on the ground 5 with a predetermined thickness by the brewing device 6.

  In addition, water is sprayed from the nozzle 8b onto the bentonite 2 squeezed out from the ground surface 5 to make it wet. At this time, as described above, the water injection amount is appropriately adjusted according to the traveling speed of the bentonite laying machine 1 so that substantially constant water is injected per unit area.

Further, the bentonite 2 in a wet state is stirred with the screw 9a to make the amount of water contained in the bentonite 2 uniform.
Thereafter, although not shown, the bentonite 2 is compacted with a compacting device.

  As described above, a series of operations of brewing bentonite 2 onto the ground surface 5 and spraying water and then stirring and compacting is repeated a plurality of times to construct a water shielding layer made of bentonite 2 having a desired thickness. To do.

  As described above, according to the construction method of the impermeable layer in the present embodiment, the bentonite 2 in a dry state is squeezed out to a construction planned place, and water is supplied to the bentonite 2 there. The bentonite 2 can be wetted without using a machine. Thus, since the hydration mixer is not used, the particle size adjustment operation for adjusting the particle size of bentonite 2, the mixing operation with water by the hydration mixer, and the transportation from the hydration mixer to the construction site for the impermeable layer Work etc. can be saved. Therefore, working efficiency can be improved.

  Moreover, since the bentonite 2 in a dry state does not form a lump, when it is brewed on the ground surface 5, the brewed thickness can be made uniform. Furthermore, since it is difficult to adhere to the truck 13 and the bentonite laying machine 1, the number of times of maintenance can be reduced.

  Moreover, since the bentonite 2 is stirred with the stirring apparatus 9, the water content contained in the bentonite 2 can be made uniform. Therefore, it is possible to construct a water shielding layer having substantially uniform water permeability. Further, since the wet bentonite 2 is stirred, no dust is generated.

  Moreover, since the bentonite 2 is continuously run by the bentonite laying machine 1 capable of self-propelling, adding and stirring, the bentonite 2 in a wet state can be laid in a short period of time and in a wide range.

  Moreover, since the water adding device 8 includes the variable pump 8c, a constant amount of water can be always supplied to a predetermined range of the bentonite 2 regardless of the traveling speed of the bentonite laying machine 1. Thereby, the amount of water contained in the brewed bentonite 2 can be made uniform.

  In addition, in this embodiment, although the case where the bentonite laying machine 1 provided with the brewing apparatus 6, the water adding apparatus 8, and the stirring apparatus 9 was used was demonstrated, it is not limited to this, For example, FIG. As shown, the finisher 11 having the brewing device 6 and the stabilizer 12 having the hydrating device 8 and the stirring device 9 are used to brew the bentonite 2 and then the brewed bentonite 2 is A water-impervious layer made of bentonite 2 may be constructed by adding water with the addition device 8 of the stabilizer 12 and stirring with the stirring device 9.

  Next, a second embodiment of the present invention will be described. In the following description, portions corresponding to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences are mainly described.

  In the second embodiment, the nozzle 8 b of the water adding device 8 is provided near the rear end of the belt conveyor 7.

FIG. 5 is a side view of the bentonite laying machine 21 according to the second embodiment of the present invention.
As shown in FIG. 5, in this embodiment, since the nozzle 8b is provided slightly behind the rear end portion of the belt conveyor 7, according to such a configuration, the bentonite 2 is sprinkled and sprinkled on the bentonite 2. Therefore, the bentonite 2 in a wet state is brewed on the ground 5.

  Thereafter, as in the first embodiment, the wet bentonite 2 is stirred with the screw 9a, and the bentonite 2 is compacted with a compaction device.

  As described above, according to the construction method of the water-impervious layer in this embodiment, water is supplied to the bentonite 2 while brewing the bentonite 2 in a planned state, so that water used in the past has been used. The bentonite 2 can be in a wet state without using a mixer.

  In addition, in each embodiment mentioned above, although the case where the bentonite 2 was laid was demonstrated, it is applicable also when laying bentonite mixed soil.

  Moreover, in each embodiment mentioned above, although the case where the bentonite 2 was stirred with the stirring apparatus 9 was demonstrated, it is not limited to this, without stirring the bentonite 2 for a long time. If it is left as it is, the water permeates into the entire bentonite 2 and the amount of water contained in the bentonite 2 becomes substantially uniform. The bentonite 2 in a state may be left as it is.

DESCRIPTION OF SYMBOLS 1 Bentonite laying machine 2 Bentonite 3 Car body 4 Hopper 5 Ground 6 Unloading device 7 Belt conveyor 8 Water adding device 8a Tank 8b Nozzle 8c Variable pump 8d Hose 9 Stirrer 9a Screw 9b Cover 10 Driver's seat 11 Finisher 12 Stabilizer 13 Truck 21 Bentonite laying Machine

Claims (2)

A self-propelled laying machine that lays bentonite or bentonite mixed soil at the planned construction site of the impermeable layer,
A brewing apparatus for brewing dry bentonite or bentonite mixed soil to the planned construction site;
A hydration apparatus for supplying water to the bentonite or bentonite mixed soil brewed from the brewing apparatus;
A bentonite laying machine comprising: a stirrer that stirs the bentonite or the bentonite mixed soil that has been watered by the water purifier. The water adding device is
A tank for storing water;
A nozzle for sprinkling water into the bentonite or the bentonite mixed soil;
Bentonite laying machine according to claim 1, characterized in that it comprises a variable pump with an adjustable discharge amount of water in accordance with the moving speed of the bentonite laying machine.

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