JP6395237B1 - Method for producing sabo soil cement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively utilize a so-called agitator truck for manufacturing sabo soil cement and to easily manufacture the sabo soil cement so that it can be easily transported to the site and is easy to construct on site. Providing various improved sabo soil cement manufacturing systems. A step of sorting the stirring earth and sand materials collected at a construction site into a stirring earth and sand material having a diameter of 90 mm or less, a step of storing the selected stirring earth and sand materials, and the stored stirring earth and sand material The process of loosening the material and moving it into the production drum of the agitator truck, along with the loosened sand and sand material, the liquid admixture and cement and the mixing water obtained from the construction site are carried into the production drum of the agitator truck A step of stirring the sand material for agitation and the like carried in the production drum, and a step of transporting the sand control soil cement produced by stirring to the placement site. [Selection] Figure 1

Description

The present invention relates to a method of manufacturing a sabo soil cement, and in particular, by using an agitator truck (generally referred to as a ready-mixed vehicle) for manufacturing and transporting a sabo soil cement, the construction on the site is facilitated. The present invention relates to a method for producing a sabo soil cement.

In general, since sabo projects are implemented in mountainous areas, construction costs such as excavation soil disposal costs increase, and transportation of construction materials such as concrete is restricted and construction efficiency is not good.
Furthermore, noise / vibration during construction of excavated soil and construction of a soil disposal site have caused environmental protection problems.

On the other hand, riverbed gravel of rivers and mountain streams that promote sabo projects are often of good quality, and it has been pointed out that the use of these is effective and important not only for the environment but also for cost reduction. there were.
From such a background, construction methods that can effectively use locally generated sediment generated by excavation and the like have been proposed for the construction of sabo facilities.

  The sabo soil cement is an index for producing a structure by using earth and sand generated on site instead of aggregate and mixing it with cement or cement milk.

  Further, depending on the amount of cement used, it can have a wide range of properties from those close to concrete to those close to solidified earth and sand. Furthermore, the effective use of construction generated soil, reduction of environmental load, and cost reduction can be greatly expected.

  Semester soil cement is roughly classified into ISM method and INSEM method. For example, local cobblestone, riverbed gravel, etc. and cement milk pumped from the plant are stirred and mixed using, for example, a twin header equipped with a backhoe. To form a mixture.

  In addition, the INSEM method is a method of sieving the generated earth and sand on the site, transporting the generated generated earth and sand to a mixing device constructed in a mixing yard, transporting it to the site after mixing with cement, and backfilling. A separate yard and a mixing device were required for mixing and stirring, and LUC material containing water, cement, and crusher orchid was required depending on the soil condition in order to screen the generated sediment.

  The problem that always arises when conducting sabo works is how to dispose of the remaining soil. In steep and narrow places such as mountainous areas, it is difficult to dispose of the remaining soil on the site, and it is necessary to secure a new soil disposal site. There are many sites where it is difficult to secure a landfill site.

Therefore, by using sabo soil cement, it is possible to reduce costs by effectively using locally generated materials and to suppress the generation of construction byproducts.
In other words, the use of locally generated soil as a material for sabo soil cement can reduce material costs and is effective in reducing costs. Effective use of locally generated soil suppresses the generation of construction byproducts, It contributes to a recycling-oriented society by reducing the environmental load, shortening the time for leaving the excavated surface, and in some cases, eliminating the need for formwork, facilitating simplification of construction, leading to shortening the construction period and improving safety.

In recent years, however, the manufacture of fluid-type or rolling-compact type sabo-proof soil cement has been facilitated by actively utilizing so-called agitator trucks (raw concrete vehicles), and is easy to transport to the site. Therefore, there has been a demand for the development of a method for producing sabo soil cement that has been improved in various ways so that it can be easily constructed on site.

JP, 2015-101830, A

The present patented invention has been made in view of the above-mentioned conventional demands. For the manufacture of sabo soil cement, the so-called agitator truck (raw concrete vehicle) can be actively used to manufacture the sabo-proof soil cement. It is an object of the present invention to provide a method for producing a sabo-proof soil cement that can be easily transported up to and including various improvements so that it can be easily constructed on site.

The present invention
A method for producing a sabo soil cement,
Sorting the stirring earth and sand material collected at the construction site into a stirring earth and sand material having a diameter of 90 mm or less, storing the sorted stirring earth and sand material, and loosening the stored stirring earth and sand material A step of moving into the production drum of the agitator truck, and a step of carrying the liquid admixture and cement and the mixing water obtained from the construction site into the production drum of the agitator truck together with the loosened sand material for stirring. A step of stirring the sand material for mixing, kneaded water, liquid admixture and cement carried in the production drum; and a step of transporting the sand control soil cement produced by stirring to the placement site with the agitator truck; Have
In the step of loosening the stored sand material for stirring and moving it into the production drum of the agitator truck, the stored sanded and solidified sand material for stirring is a mesh having a pitch of 200 mm × 200 mm at the inlet. Into the hopper device in which the members are stretched, the stored and compacted earth and sand material having a diameter of 90 mm or less is charged, and the hopper device is horizontally swung,
After loosening, a compacted earth and sand material having a diameter of 90 mm or less passes through the mesh hole of the mesh member and is introduced into the hopper device, and cobbles with a diameter of 250 mm or more are removed.
When the earth and sand material for stirring having a diameter of 90 mm or less moves into the hopper device and reaches a predetermined capacity, the weight is measured by a measuring instrument provided in the hopper device, and a predetermined measurement value set. The shutter door provided at the lower part of the hopper device is opened, and the stirring earth and sand material having a diameter of 90 mm or less is configured to fall on the belt conveyor.
A plurality of belt conveyors connected in series are prepared, and the ascending inclination angle of the connected belt conveyors as a whole is installed on an ascending slope where the agitated earth and sand material having a diameter of 90 mm or less is not slipped off. ,
The unloading of the cement in the process of carrying the liquid admixture and cement and the mixing water obtained from the construction site into the production drum of the agitator truck together with the loosened earth and sand material for stirring is about The cement stored in the cement silo, which is a 30t vertical silo, is poured into the hopper of an agitator truck with a hopper height of 3.5m from a point of 3.5m or more, and a scaffold is placed around the silo. Providing, controlling the cement damper from the scaffold, dropping into the production drum from the mouth of the hopper, and throwing in,
It is characterized by having
Or
The horizontal swing of the hopper device is performed by a hydraulic swing device attached to the hopper device.
It is characterized by
Or
The measuring instrument is a load cell provided in a hopper device.
It is characterized by
Or
The kneading water and the liquid admixture are stored after being subjected to anti-freezing means.
It is characterized by this.

According to the present invention, for the production of a fluid type or rolling type sabo soil cement, a so-called agitator truck can be actively used to make it easy to carry and transport to the site. It is possible to provide a method for producing a sabo soil cement that has been improved in various ways so that it can be easily constructed on site.

It is a configuration explanatory view for explaining the configuration of the present invention. It is explanatory drawing explaining the structure of an external hopper. It is explanatory drawing explaining the introduction state of kneading water. It is explanatory drawing explaining the injection | throwing-in state of cement. It is explanatory drawing explaining the introduction state of an admixture. It is explanatory drawing explaining one Example of a freezing prevention apparatus.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
First, a so-called local earth and sand material 3 for agitation is obtained at a construction site such as a mountainous area, which is a planned construction site such as a sabo dam. The riverbed gravel of rivers and mountain streams that promote sabo projects are often of good quality. Moreover, it is effective and important to utilize these not only from the environmental aspect but also from the viewpoint of cost reduction.

  The stirring earth and sand material 3 to be acquired is classified into, for example, the stirring earth and sand material 3 having a diameter of 90 mm or less and the other, that is, the earth and sand having a diameter of 90 mm or more.

  In addition, you may fractionate into the earth and sand material 3 for stirring which does not have a diameter of 90 mm or less but has a diameter of 80 mm or less. This is because the earth and sand of such a size does not cause damage to the inside of the drum 9 even if it is rotated and kneaded in the drum 9 of the agitator track 8 described later.

  The sorting method is not limited at all. As an example, a skeleton bucket is attached to a heavy machine such as a backhoe, and the skeleton bucket is used as a sieve to separate into a sand material for stirring 3 having a diameter of 90 mm or less or a diameter of 80 mm or less and other earth and sand. It is possible to do.

  The sorted earth and sand material 3 having a diameter of, for example, a diameter of 90 mm or less is stored in a predetermined place on the construction site for a period of time.

  In the present invention, the manufacture of sabo soil cement is performed mainly by the agitator truck 8. Originally, the so-called agitator truck 8 is used for transporting ready-mixed concrete (fresh concrete, ready-mixed concrete) made in a manufacturing factory called batcher plant or ready-mixed factory to construction or civil engineering construction sites. It is.

  The ready-mixed concrete will not be uniform because aggregates and water will be separated if proper agitation is not performed during transportation. Therefore, the container is slowly rotated and transported with stirring.

  As described above, the agitator truck 8 is a vehicle having a special structure in which a mechanism that moves on the loading platform during traveling is mounted and the drive shaft is branched from the engine rotation shaft.

  As described above, the original purpose of the agitator truck 8 is to transport concrete and ready-mixed concrete produced in advance in a factory while stirring.

  Further, a concrete charging port called a hopper 1 is provided at the front end portion of the drum 9 of the agitator track 8, and a chute 10 is provided at the rear end portion of the drum 9 to feed the kneaded concrete to the outside. ing. Further, a spiral blade is attached to the inside of the drum 9, and the concrete is stirred and kneaded by the blade 9 as the drum 9 rotates.

  As described above, the agitator truck 8 is originally used for transporting ready-mixed concrete (fresh concrete, ready-mixed concrete) to a construction site for construction or civil engineering. In the present invention, the agitator truck 8 is used. Was used positively and not for transportation, but also for the production of sabo soil cement.

  First, the steps until the agitated earth and sand material having a diameter of, for example, a diameter of 90 mm or less is introduced into the drum 9 of the agitator track 8 will be described.

  1 and 2, reference numeral 2 indicates a weighing hopper device arranged outside, for example. For example, the sorted earth and sand material 3 having a diameter of 90 mm or less is charged into the charging port of the hopper device 2. Here, for example, a mesh member 19 having a pitch of 200 mm × 200 mm is stretched at the inlet of the hopper device 2.

  That is, the agitated earth and sand material 3 having a diameter of, for example, a diameter of 90 mm or less, which has already been sorted, is stored for a long time in a predetermined place of the construction site, and may be slightly compacted by long-time storage. For this purpose, the agitated earth and sand material 3 having a diameter of 90 mm or less is scooped up by a heavy machine and then dropped to the inlet of the hopper device 2.

  At the charging port of the hopper device 2, the agitated earth and sand material 3 having a diameter of 90 mm or less is dropped and placed, and the hopper device 2 itself has a diameter of 90 mm or less compacted by, for example, horizontal swinging. The agitating earth and sand material 3 is loosened and passes through the mesh holes of the mesh member 19 and is put into the hopper device 2.

  The mesh member 19 having a pitch of 200 mm × 200 mm loosens the stirring earth and sand material 3 and removes cobblestones having a diameter of 250 mm or more.

Here, the means for horizontally swinging the hopper device 2 is not limited at all. For example, a hydraulic swing device or the like can be attached to the hopper device 2 to swing.
As can be understood from FIG. 2, the hopper device 2 is installed on the gantry 6 via the load cell 5, for example.

  And when the earth and sand material 3 for agitation having a diameter of 90 mm or less moves into the hopper device 2 and reaches a predetermined capacity, its weight is measured by the load cell 5, and the set predetermined measurement value is obtained. At that time, the shutter door 7 is opened, and the stirring earth and sand material 3 having a diameter of, for example, 90 mm or less in the hopper device 2 is configured to fall on the belt conveyor 4.

  As shown in FIG. 1, two belt conveyors 4 are prepared, and are installed with an upward slope from the proximal end portion of the first belt conveyor 4 toward the distal end portion. The second belt conveyor 4 is also installed with an upward slope from the base end portion toward the tip end portion.

  In addition, when the inclination angle of the ascending slope is too steep for the belt conveyor 4, the agitating earth and sand material 3 having a diameter of 90 mm or less does not move in a state where it rises forward, the lower side, that is, the base end part Slips to the side. Therefore. It is important that the agitating earth and sand material 3 having a diameter of 90 mm or less is installed in an ascending gradient that does not slide down. Therefore, the upward inclination angle of the belt conveyor 4 is set to about 17 degrees.

  By the way, the length of the normally used belt conveyor 4 shown in FIGS. 1 and 2 is about 7 m. If only one belt conveyor 4 of this length is used and the belt conveyor 4 is installed at the above-mentioned inclination angle, it will not reach the height of the agitator truck 8 to the hopper 1 inlet. Therefore, the agitation soil material 3 having a diameter of, for example, 90 mm or less can be stably transferred to the hopper 1 inlet of the agitator truck 8 by using two belt conveyors 4.

  In the agitator track 8, for example, the mixing water 11 and the liquid admixture 14 are put together with the agitating earth and sand material 3 having a diameter of 90 mm or less. The kneaded water 11 is also procured from the construction site. That is, as shown in FIG. 3, a puddle 12 such as a lake or a river is searched for in a mountainous area that is a construction site, and kneaded water 11 is procured therefrom. A submersible pump is put into the puddle 12, and a predetermined amount of the kneaded water 11 is introduced into the drum 9 of the agitator track 8 through the flow meter 13.

  As for the liquid admixture 14, the liquid admixture 14 generated in advance at the construction site or by thinning the liquid admixture 14 on the spot is generated and stored in the admixture tank 15. Then, a predetermined amount of the stored liquid admixture 14 is introduced into the drum 9 of the agitator truck 8 through the flow meter 13.

  For example, when the agitating earth and sand material 3 having a diameter of 90 mm or less, the kneading water 11 and the liquid admixture 14 are put into the drum 9 of the agitator track 8, the cement is then obtained as shown in FIG. It is thrown.

  The cement is stored in, for example, a cement silo 20 that is a vertical silo of about 30 t installed at a construction site, and the cement silo 20 is capable of weighing up to 1.0 t and stored.

By the way, since the hopper height of the agitator truck 8 is about 3.5 m, it is necessary to input cement from a location higher than that height.
As an example of the cement injection method, a BT scaffold (about 3 m in height) is provided around the silo, and the worker controls the cement damper with a remote control and passes through a transparent flexible pipe of φ200 mm from the hopper's mouth to the drum 9. It is possible to drop it into the inside and put it in.

The amount of cement used is considered to be 100 to 300 kg / m ³ × 100 m ³ = 10 to 30 tons per unit cement of 100 to 300 kg / m ³ .
When the cement is finally put in this way, the drum 9 rotates and kneading of the sabo soil cement is started.

  After kneading for a predetermined time, a sand control soil cement is generated in the drum 9. Then, the generated sabo soil cement is transported to a predetermined placement location and placed.

  FIG. 6 shows an antifreezing device 16 for kneading water 11 and liquid admixture 14. In cold regions, the temperature is about minus 10 ° C. in severe winters, and in such regions, anti-freezing measures such as mixed water 11 and liquid admixture 14 are necessary in the sabo soil manufacturing system. .

  As shown in FIG. 6, a water tank 17 storing kneaded water 11 and an admixture tank 15 storing liquid admixture 14 are housed in an antifreeze device 16 and a heating device 18 such as a jet heater is used. The kneaded water 11 and the liquid admixture 14 are kept in a state where they are not frozen. Then, when producing a sabo soil cement in the severe winter season, the kneading temperature can be maintained at about 5 ° C., and an appropriate sabo soil cement production situation can be secured.

  Further, in order to keep the kneading temperature of the sabo soil cement at about 10 ° C., a heating device 21 is attached to the water tank 17 and the water temperature of the kneading water 11 is kept at 40 ° C. to 50 ° C.

  By the way, although it is the earth-and-sand material 3 for stirring used as an aggregate of sabo-proof soil cement, the maximum aggregate dimension (Gmax) is the hopper input port (φ500 mm) of the agitator truck 8 and the internal structure of the agitator truck 8 ( In consideration of damage to the spiral and the side wall, the stirring earth and sand material 3 having a diameter of about 90 to 80 mm or less is preferable.

  Next, the number of agitator trucks 8 to be used will be determined in consideration of the transport distance and unloading time, and at least three agitator trucks 8 will be necessary at one construction site. It is done.

Further, considering the mixing amount per one agitator truck 8, the mixing capacity is 3 m ³ per one agitator truck 8.

The sediment material amount for stirring, 1.6 to 2.0t / m ³ × 3m ³ / base = 4.8 to 6.0T / base, the amount of cement is 0.1 to 0.3t / m ³ × 3m ³ / base = 0.3 to 0.9t / Table, mixing water amount is 0.1 to 0.3 t / m ³ × 3 m ³ / table = 0.3 to 0.9 t / table, liquid admixture amount is 0.2 to 0.3 t × 1.5% × 3 m ³ / table = 0.9 to 13.5 kg / unit is required.

In addition, the production capacity (m ³ / hour) is 3 minutes / 6 t / unit (about 5 times with 0.7 class backhoe), and the belt from the hopper device 2 to the belt. Loading to the agitator truck 8 using the conveyor 4 is 2 minutes / 6t / unit, cement charging time (including belt conveyor loading or silo moving time) 2 minutes / t, mixing water 11, and liquid mixing Since the agent 14 is charged at the same time as the stirring material 3 is charged, 0 minutes, the charging time of the stirring material 3 per vehicle = A + B + C = 3 + 2 + 2 = 7 minutes, high-speed stirring per agitator truck 8 Time = 3 minutes, time per cycle = A + B + C + D = 3 + 2 + 2 + 3 = 10 minutes → 12 minutes / 3 m ³ , production per hour = 60 minutes ÷ 12 minutes / 3 m ³ = 5 units × 3 m ³ / unit = 15 m ³ / Time.

(About installing the mesh member 19 at the inlet of the hopper device 2)
When the sand material 3 for agitation is introduced into the hopper device 2, cobbles having a diameter of 80 to 90 mm or less may be mixed as aggregates. Need to be removed.

  The pitch of the mesh is desired to be 70 mm × 70 mm, but there is a possibility that the stirring earth and sand material 3 may not pass. Therefore, a mesh having a larger pitch, for example, a mesh having a pitch of 200 mm × 200 mm, is used. It is necessary to attach a horizontal swing member. As a result, the stirring earth and sand material 3 having a diameter of 80 mm to 90 mm or less can be reliably introduced into the hopper device 2.

(About dropping and charging of the sand material 3 for stirring to the belt conveyor 4)
As described above, the agitator truck 8 is charged with the sand material 3 for stirring using the belt conveyor 4. In addition, since the maintenance is easy and the belt conveyor of a special specification is not used, the cost becomes low. Therefore, two general flat belt conveyors are combined. The height of the gantry 6 can be adjusted so that the two belt conveyors can be easily positioned. The base 6 is preferably light and easy to fix.

  As described above, the maximum particle shape of the stirring sand material 3 is about 80 mm to 90 mm, so the inclination angle of the belt conveyor 4 is an important point. That is, the belt conveyor 4 is a general one, and a plurality of the belt conveyors 4 can be used so that the stirring earth and sand material 3 on the belt conveyor 4 can move uphill without sliding down, and an agitator. -It is important that the truck 8 can be installed at a height up to the hopper 1 inlet.

(About the tank 17 of the mixed water 11)
As described above, the kneaded water 11 is pumped from a nearby river by a submersible pump (200 V, φ2 inches) and stored in a water tank 17 of about 10 m ³ . A predetermined amount of the mixing water 11 is poured into the agitator truck 8 simultaneously with the stirring earth and sand material 3 through the flow meter 13.

(About the admixture tank 15)
The liquid admixture 14 is accepted as a lorry and is 4.000 kg per one time. At the construction site, for example, two 2.000 liter containers with lids and one 1.000 liter container are prepared to constitute the admixture tank 15.

The addition of the liquid admixture 14 is performed simultaneously with the kneading water 11, but may be performed at that time when the subsequent addition after the cement is added is effective.
When the unit cement amount is 300 kg / m ³ , the admixture amount is 4.5 kg / m ³ when the added amount is 1.5%, and at 100 m ³ / day, 450 kg / day is consumed.

DESCRIPTION OF SYMBOLS 1 Hopper 2 Hopper apparatus 3 Agitation sand material 4 Belt conveyor 5 Load cell 6 Mount 7 Shutter door 8 Agitator truck 9 Drum 10 Chute 11 Kneading water 12 Puddle 13 Flow meter 14 Liquid admixture 15 Admixture tank 16 Freezing prevention apparatus 17 Water tank 18 Heating device 19 Mesh member 20 Cement silo 21 Heating device

Claims (4)

A method for producing a sabo soil cement,
Sorting the stirring earth and sand material collected at the construction site into a stirring earth and sand material having a diameter of 90 mm or less, storing the sorted stirring earth and sand material, and loosening the stored stirring earth and sand material A step of moving into the production drum of the agitator truck, and a step of carrying the liquid admixture and cement and the mixing water obtained from the construction site into the production drum of the agitator truck together with the loosened sand material for stirring. A step of stirring the sand material for mixing, kneaded water, liquid admixture and cement carried in the production drum; and a step of transporting the sand control soil cement produced by stirring to the placement site with the agitator truck; Have
In the step of loosening the stored sand material for stirring and moving it into the production drum of the agitator truck, the stored sanded and solidified sand material for stirring is a mesh having a pitch of 200 mm × 200 mm at the inlet. Into the hopper device in which the members are stretched, the stored and compacted earth and sand material having a diameter of 90 mm or less is charged, and the hopper device is horizontally swung,
After loosening, a compacted earth and sand material having a diameter of 90 mm or less passes through the mesh hole of the mesh member and is introduced into the hopper device, and cobbles with a diameter of 250 mm or more are removed.
When the earth and sand material for stirring having a diameter of 90 mm or less moves into the hopper device and reaches a predetermined capacity, the weight is measured by a measuring instrument provided in the hopper device, and a predetermined measurement value set. The shutter door provided at the lower part of the hopper device is opened, and the stirring earth and sand material having a diameter of 90 mm or less is configured to fall on the belt conveyor.
A plurality of belt conveyors connected in series are prepared, and the ascending inclination angle of the connected belt conveyors as a whole is installed on an ascending slope where the agitated earth and sand material having a diameter of 90 mm or less is not slipped off. ,
The unloading of the cement in the process of carrying the liquid admixture and cement and the mixing water obtained from the construction site into the production drum of the agitator truck together with the loosened earth and sand material for stirring is about The cement stored in the cement silo, which is a 30t vertical silo, is poured into the hopper of an agitator truck with a hopper height of 3.5m from a point of 3.5m or more, and a scaffold is placed around the silo. Providing, controlling the cement damper from the scaffold, dropping into the production drum from the mouth of the hopper, and throwing in,
A method for producing a sabo-proof soil cement.
The horizontal swing of the hopper device is performed by a hydraulic swing device attached to the hopper device.
The method for producing a sabo soil cement according to claim 1.
The measuring instrument is a load cell provided in a hopper device.
The method for producing a sabo soil cement according to claim 1 or 2, characterized by the above.
The kneading water and the liquid admixture are stored after being subjected to anti-freezing means.
The method for producing a sabo soil cement according to claim 1, 2 or 3.

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