JP2019093558A - Production method for erosion control soil cement - Google Patents

Abstract

[PROBLEMS] To manufacture erosion control soil cement by positively utilizing a so-called agitator truck to facilitate the manufacture, facilitate transportation to the site, and facilitate construction at the site. To provide a production system for variously improved sabo soil cement. SOLUTION: A step of sorting agitation earth and sand materials collected at a construction site into agitation earth and sand materials having a diameter of 90 mm or less, a step of storing the selected agitation earth and sand materials, and a process of storing the agitation earth and sand materials. A step of loosening the material and moving it into the production drum of the agitator truck, and carrying the loosened earth and sand material for agitation together with the liquid admixture, cement, and kneading water obtained from the construction site into the production drum of the agitator truck. a step of stirring the carried-in earth and sand material for stirring in a manufacturing drum; and a step of transporting the erosion control soil cement manufactured by stirring to a placement site. [Selection diagram] Fig. 1

Description

The present invention relates to a system for producing a sabo soil cement, and in particular, facilitates the construction on site by utilizing an agitator track (generally referred to as a fresh concrete car) for producing and transporting the sabo soil cement. It relates to a production system of sabo soil cement.

In general, it is pointed out that the construction cost such as excavated soil disposal cost is increased and the transportation of construction materials such as concrete is restricted and the construction efficiency is not good because the erosion control project is implemented in the mountain area.
Furthermore, noise and vibration when transporting excavated residual soil and construction of a dumping place have caused problems concerning environmental protection.

On the other hand, riverbeds, rivers and streams that promote sabo projects are often of high quality, and it is pointed out that using them is effective and important not only from the environmental aspect but also from the cost reduction point of view. there were.
From such a background, a construction method has been proposed that can effectively utilize the locally generated soil produced by excavation etc. in the construction of the erosion control facility.

  Sabo-proof soil cement is an index that uses soil generated in the field instead of aggregate and mixes it with cement or cement milk to produce a structure.

  In addition, 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 soil. In addition, effective use of construction soil, reduction of environmental impact, and cost reduction can be expected.

  The sabo soil cement is roughly divided into the ISM method and the INSEM method. The ISM method is, for example, stirring and mixing of local cobbles and riverbed gravel, etc. and cement milk pumped from the plant using a twin header attached to a backhoe, for example. Form a mixture.

  The INSEM construction method is a construction method that sifts out the generated soil in the field, transports the sifted soil generated to the mixing device constructed in the mixing yard, conveys it to the site after mixing with cement, and backfills. A separate yard and mixing equipment were required for mixing and agitation, and depending on the soil conditions for sieving local generated soil, LUC materials containing water, cement, and crusherlan were required.

  The problem that always arises when performing erosion control work is the method of disposal of the remaining soil, and in steep and narrow places such as mountain areas, it is difficult to treat the remaining soil in the site, and it is necessary to secure a new dumping site. There are many places where it is difficult to secure a dumping ground in Japan.

Therefore, by adopting the soil-control soil cement, it is possible to reduce the cost by effectively utilizing the locally generated material and to suppress the generation of construction by-products.
That is, by using the locally generated soil as a material for the sabo soil cement, the material cost can be reduced, which is effective for cost reduction, and the effective use of the locally generated soil suppresses the generation of construction by-products, It contributes to the recycling society by reducing the environmental load, shortening the leaving period of the excavated surface, sometimes requiring no formwork, facilitating the simplification of construction, leading to shortening of the construction period and improvement of safety.

Therefore, in recent years, the so-called agitator truck (green concrete car) has been actively used in the production of fluid-type or compacted-type sand protection soil cement, which can be easily manufactured and easily transported to the site. It came to be desired to develop a production system for sabo-soil cement which has been variously modified to be easy to construct on site.

JP-A-2015-101830

This patented invention was made in view of the above-mentioned conventional demand, and it is possible to easily utilize the so-called agitator truck (green concrete car) for the production of the sand control soil cement, and at the same time it can be produced on site It is an object of the present invention to provide a system for producing an anti-soiling soil cement which has been variously modified so that it can be easily transported up to and easily constructed on site.

The present invention
It is a production system of sabo soil cement,
A step of 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, a step of storing the sorted stirring earth and sand material, and the stored stirring earth and sand material Moving into the manufacturing drum of the agitator track, carrying in the mixing agent obtained from the construction site with the liquid admixture and the cement and the mixing soil material loosened with agitation, into the manufacturing drum of the agitator track; Stirring in the production drum the stirring soil material, mixing water, liquid admixture, and cement carried in, and transporting the sand soil soil cement produced by stirring to the placement site by the agitator track ,
Characterized by having
Or
In the step of loosening the stored soil material for stirring and moving it into the manufacturing drum of the agitator track, a loosening member is attached to the upper surface inlet of the hopper, and the soil material for stirring moved onto the loosening member is Shake to loosen and feed into the hopper, and also feed into the manufacturing drum of the agitator track via a transfer device.
It is characterized by
Or
The transfer device is composed of a plurality of belt conveyors, the stirring earth and sand material from the hopper falls onto the belt conveyor, and the plurality of falling belts of stirring earth and sand material is on the belt conveyor It is possible to install on an upslope, which can be transported by means, and the soil material for stirring is transported into the manufacturing drum of the agitator truck via the belt conveyor.
It is characterized by
Or
The mixing water and the liquid admixture are stored by being provided with antifreeze means.
It is characterized by

According to the present invention, the so-called agitator track (green concrete car) can be actively used for the production of flow-type or compacted-type sand protection soil cement, so that the production can be facilitated and the transportation to the site is also easy. It has an excellent effect of being able to provide a production system of sabo-soil cement that has been variously modified to be easy to construct on site.

It is structure explanatory drawing explaining the structure of this invention. It is an explanatory view explaining composition of an external hopper. It is an explanatory view explaining the introduction state of mixing water. It is an explanatory view explaining an injection state of cement. It is explanatory drawing explaining the introduction state of an admixture. It is an explanatory view explaining one example of a freeze prevention device.

Hereinafter, the best mode for carrying out the present invention will be described based on the drawings.
First, for example, at a construction site such as a mountain area where a planned construction site such as a sabo dam will be built, so-called on-site earth and sand material 3 for stirring is obtained. The riverbeds and riverbeds that promote the sabo business are often of good quality. In addition, utilizing these is effective and important not only in terms of the environment but also in terms of cost reduction.

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

  The material may be separated into stirring earth and sand material 3 having a diameter of 80 mm or less instead of the diameter of 90 mm or less. If it is earth and sand of this size, it is because there is no risk of damaging the inside of the drum 9 even if it is rotated within the drum 9 of the agitator track 8 described later and kneaded.

  In addition, about the method of the said separation, there is no limitation in any way. For example, a skeleton bucket is attached to a heavy equipment such as a backhoe, and the skeleton bucket is used as a sieve to separate it into stirring earth and sand material 3 having a diameter of 90 mm or less or 80 mm or less and other sediments. It is possible to do.

  Then, the separated soil material 3 for agitation having a diameter of, for example, 90 mm or less is temporarily stored at a predetermined place of the construction site.

  In the present invention, the production of the sabo soil cement is mainly performed by the agitator track 8. Originally, the so-called agitator track 8 is used to transport fresh concrete (fresh concrete, fresh concrete) made in a manufacturing plant called batcher plant or fresh concrete plant to construction site of civil engineering It is.

  Fresh concrete is separated even if it is not properly stirred during transportation, and aggregate and water are separated, resulting in non-uniformity. Therefore, the container is rotated slowly and transported while being stirred.

  As described above, the agitator track 8 is a vehicle that has a special structure, such as a mechanism that is movable on the bed during traveling, and that branches the drive shaft from the engine rotation shaft.

  As described above, the agitator track 8 is intended to transport while mixing pre-produced concrete and ready-mixed concrete while stirring.

  A concrete inlet called hopper 1 is provided at the front end of the drum 9 of the agitator track 8, and a chute 10 is provided at the rear end for feeding the kneaded concrete to the outside. ing. In addition, a spiral blade is attached to the inside of the drum 9, and when the drum 9 rotates, the concrete is stirred and kneaded by the blade.

  As described above, the agitator track 8 is originally used to transport fresh concrete (fresh concrete, fresh concrete) to construction sites for construction and civil engineering, but in the present invention, the agitator track 8 is used. Was used actively, not for transportation, but also for the production of sabo soil cement.

  First, a process until the separated soil material for agitation having a diameter of, for example, 90 mm or less is introduced into the drum 9 of the agitator track 8 will be described.

  In FIG. 1 and FIG. 2, the code | symbol 2 shows the hopper apparatus for weighings arrange | positioned, for example outside. At the inlet of the hopper device 2, for example, the stirred soil material 3 having a diameter of 90 mm or less is introduced. Here, a mesh member 19 having a pitch of, for example, 200 mm × 200 mm is stretched at the inlet of the hopper device 2.

  That is, the sorted soil material 3 for stirring having a diameter of 90 mm or less, for example, which has already been separated, is stored at a predetermined place of the construction site for a long time, and there is a risk that it may be slightly clogged by long time storage. Therefore, after scooping up the stirring earth and sand material 3 having a diameter of 90 mm or less tightened by a heavy machine, it is dropped to the inlet of the hopper device 2.

  At the inlet of the hopper device 2, the stirring soil material 3 having a diameter of 90 mm or less, which has been dropped and placed, has a diameter of 90 mm or less which is tightened by the hopper device 2 itself swinging horizontally, for example. The stirring earth and sand material 3 is loosened, passes through the mesh holes of the mesh member 19 and is introduced into the hopper device 2.

  By the mesh members 19 having a pitch of 200 mm × 200 mm, loosening of the sand material 3 for agitation and removal of cobbles with a diameter of 250 mm or more are performed.

Here, the means for horizontally rocking the hopper device 2 is not limited at all. For example, a hydraulic rocking device or the like can be attached to the hopper device 2 and rocked.
Further, as understood from FIG. 2, the hopper device 2 is installed on the mount 6 via, for example, the load cell 5.

  Then, when the stirring earth and sand material 3 having a diameter of 90 mm or less moves into the hopper device 2 and reaches a predetermined volume, the weight is measured by the load cell 5 and is set to the predetermined measurement value set. When the shutter door 7 is opened, the stirring soil material 3 having a diameter of, for example, 90 mm or less in diameter in the hopper device 2 is dropped onto the belt conveyor 4.

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

  Incidentally, if the inclination angle of the upward slope is made too steep for the belt conveyor 4, the agitating soil material 3 having a diameter of 90 mm or less does not move forward, and the lower side, ie, the base end portion It slips to the side. Therefore. It is important that the stirring earth and sand material 3 having a diameter of 90 mm or less be installed on an upward slope that does not slip off. Therefore, the upward inclination angle of the belt conveyor 4 is set to about 17 degrees.

  By the way, the length of the usually used belt conveyor 4 shown in FIG. 1 and FIG. 2 is about 7 m. If only one belt conveyor 4 of this length is used and installed at the above-mentioned inclination angle, it does not reach the height to the hopper 1 inlet of the agitator track 8 by far. Therefore, it is possible to stably transport the stirring earth and sand material 3 having a diameter of, for example, 90 mm or less to the hopper 1 inlet of the agitator track 8 by using two of the belt conveyors 4.

  Into the agitator track 8 are mixed the mixing and mixing water 11 and the liquid admixture 14 together with the stirring earth and sand material 3 having a diameter of 90 mm or less, for example. The mixed 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 in a mountain area which is a construction site, and mixed water 11 is procured from there. A submersible pump is placed in the puddle 12, and a predetermined amount of mixing water 11 is introduced into the drum 9 of the agitator track 8 via the flow meter 13.

  As for the liquid admixture 14, the liquid admixture 14 generated in advance at the construction site or the liquid admixture 14 is diluted in situ or the like to form the liquid admixture 14 and stored in the admixture tank 15. Then, the stored liquid admixture 14 is introduced into the drum 9 of the agitator track 8 by a predetermined amount via the flow meter 13.

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

  The cement is stored, for example, in a cement silo 20 which is an approximately 30 t vertical silo installed at a construction site. In this cement silo 20, weighing up to an upper limit of 1.0 t is possible and stored.

By the way, since the hopper height of the agitator track 8 is about 3.5 m, it is necessary to introduce cement from a point above that height.
And as an example of the method of throwing in cement, BT scaffold (about 3 m in height) is provided around the silo, and the worker controls the cement damper by remote control, and through the transparent flexible tube of φ 200 mm drum 9 from the mouth of hopper It is possible to drop it inside and throw it in.

The amount of cement used is considered to be 100 to 300 kg / m ³ × 100 m ³ = 10 to 30 t per unit cement of 100 to 300 kg / m ³ .
As described above, when the cement is finally introduced, the drum 9 is rotated and kneading of the sand control soil cement is started.

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

  6 shows the antifreezing device 16 for the mixed water 11 and the liquid admixture 14. In cold regions, it will be as low as -10 ° C in the deep winter, and in such regions, anti-soiling soil production systems require anti-freeze measures such as mixing water 11 and liquid admixture 14 etc. .

  As shown in FIG. 6, the water tank 17 storing the mixed water 11 and the admixture tank 15 storing the liquid admixture 14 are accommodated in the antifreeze device 16 and a heating device 18 such as a jet heater is used. The said mixing water 11 and the liquid admixture 14 are hold | maintained in the state which does not freeze. Then, when manufacturing the sand control soil cement in the deep winter season, the kneading temperature can be maintained at about 5 ° C., and the appropriate sand protection soil cement production status can be secured.

  Further, in order to maintain the kneading temperature of the soil erosion control soil soil at about 10 ° C., the heating device 21 is attached to the water tank 17 and the water temperature of the mixed water 11 is maintained at 40 ° C. to 50 ° C.

  By the way, although it is the earth and sand material 3 for agitation which is used as an aggregate of sabo soil cement, the maximum aggregate dimension (Gmax) is the hopper input port (φ 500 mm) of the agitator track 8 and the internal structure of the agitator track 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 transportation distance and unloading time, and it is considered that at least 3 agitator trucks 8 are required at one construction site. Be

Also, considering the mixing amount per one agitator tracks 8, per one agitator track 8, a mixed volume of 3m ^3.

And the amount of earth and sand materials for stirring is 1.6 to 2.0 t / m ³ × 3 m ³ / stand = 4.8 to 6.0 t / stand, and the cement amount is 0.1 to 0.3 t / m ³ × 3 m ³ / stand = 0.3 to 0.9 t / Table, mixing amount of water is 0.1 to 0.3 t / m ³ × 3 m ³ / base = 0.3 to 0.9 t / base, the amount of liquid admixture is 0.2 to 0.3 t × 1.5% × 3 m ³ / base = 0.9 to 13.5 kg / unit is required.

In addition, as production capacity (m ³ / hour), 3 minutes / 6 t / unit (about 5 times with 0.7 class backhoe), the time for charging the sediment material 3 for agitation into the hopper device 2 is from the hopper device 2 to the belt Feeding to agitator track 8 using conveyor 4 is 2 minutes / 6 t / unit, cement loading time (including belt conveyor loading time to silo moving time) 2 minutes / t, mixing water 11, and liquid mixing Since the agent 14 is added simultaneously with the addition of the sediment material 3 for agitation, 0 minutes, the addition time of the sediment material 3 for agitation per unit = A + B + C = 3 + 2 + 2 = 7 minutes, high speed agitation per unit of agitator track 8 Time = 3 minutes, time per cycle = A + B + C + D = 3 + 2 + 2 + 3 = 10 minutes → 12 minutes / 3 m ³ , hourly production volume = 60 minutes 12 minutes / 3 m ³ = 5 units x 3 m ³ / unit = 15 m ³ / Time.

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

  The mesh pitch is 70 mm × 70 mm, but there is a possibility that the mixing soil material 3 may not pass, so a mesh with a larger pitch, for example, a 200 mm × 200 mm mesh, is used. It is necessary to attach a horizontal rocking 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 the fall and the charge to the belt conveyor 4 of the earth and sand material 3 for agitation)
As described above, the introduction of the soil material 3 for agitation into the agitator track 8 is performed using the belt conveyor 4. In addition, it is decided to combine two ordinary flat belt conveyors because maintenance is easy and the cost is low since no special-purpose belt conveyor is used. And, in order to facilitate positioning of the two belt conveyors, the height of the gantry 6 can be adjusted. The mount 6 is preferably light and easy to fix.

  As described above, since the maximum particle shape of the stirring earth and sand material 3 is about 80 mm to 90 mm, the inclination angle of the belt conveyor 4 is an important point. That is, a common belt conveyor 4 is used, and using a plurality of them, the agitating soil material 3 on the belt conveyor 4 can be moved uphill without falling down, and the agitator can be moved. -It is important to be able to be installed so as to reach the height to the hopper 1 inlet of the truck 8.

(About the water tank 17 of the mixing water 11)
As described above, the mixed water 11 is, for example, pumped from a nearby river by a submersible pump (200 V, φ 2 inches) and stored in a water tank 17 of about 10 m ³ . A mixing / mixing water 11 of a specified amount is injected to the agitator track 8 simultaneously with the sediment material 3 for agitation via a flow meter 13.

(About the admixture tank 15)
The liquid admixture 14 is accepted as a lorry, and it is 4.000 kg at one time. At the construction site, for example, an admixture tank 15 is constructed by preparing two 2.000 liter lidded containers and one 1.000 liter container.

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

Reference Signs List 1 hopper 2 hopper device 3 soil material for stirring 4 belt conveyor 5 load cell 6 frame 7 frame 7 shutter door 8 agitator track 9 drum 10 chute 11 mixing water 12 pool 13 flow meter 14 liquid admixture 15 admixture tank 16 antifreeze device 17 Water tank 18 heating device 19 mesh member 20 cement silo 21 heating device

The present invention relates to a method of manufacturing a sabo soil cement, and in particular, facilitates the construction on site by utilizing an agitator track (generally referred to as a fresh concrete car) for manufacturing and transporting the sabo soil cement. The present invention relates to a method of manufacturing a sabo soil cement.

In general, it is pointed out that the construction cost such as excavated soil disposal cost is increased and the transportation of construction materials such as concrete is restricted and the construction efficiency is not good because the erosion control project is implemented in the mountain area.
Furthermore, noise and vibration when transporting excavated residual soil and construction of a dumping place have caused problems concerning environmental protection.

On the other hand, riverbeds, rivers and streams that promote sabo projects are often of high quality, and it is pointed out that using them is effective and important not only from the environmental aspect but also from the cost reduction point of view. there were.
From such a background, a construction method has been proposed that can effectively utilize the locally generated soil produced by excavation etc. in the construction of the erosion control facility.

  Sabo-proof soil cement is an index that uses soil generated in the field instead of aggregate and mixes it with cement or cement milk to produce a structure.

  In addition, 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 soil. In addition, effective use of construction soil, reduction of environmental impact, and cost reduction can be expected.

  The sabo soil cement is roughly divided into the ISM method and the INSEM method. The ISM method is, for example, stirring and mixing of local cobbles and riverbed gravel, etc. and cement milk pumped from the plant using a twin header attached to a backhoe, for example. Form a mixture.

  The INSEM construction method is a construction method that sifts out the generated soil in the field, transports the sifted soil generated to the mixing device constructed in the mixing yard, conveys it to the site after mixing with cement, and backfills. A separate yard and mixing equipment were required for mixing and agitation, and depending on the soil conditions for sieving local generated soil, LUC materials containing water, cement, and crusherlan were required.

  The problem that always arises when performing erosion control work is the method of disposal of the remaining soil, and in steep and narrow places such as mountain areas, it is difficult to treat the remaining soil in the site, and it is necessary to secure a new dumping site. There are many places where it is difficult to secure a dumping ground in Japan.

Therefore, by adopting the soil-control soil cement, it is possible to reduce the cost by effectively utilizing the locally generated material and to suppress the generation of construction by-products.
That is, by using the locally generated soil as a material for the sabo soil cement, the material cost can be reduced, which is effective for cost reduction, and the effective use of the locally generated soil suppresses the generation of construction by-products, It contributes to the recycling society by reducing the environmental load, shortening the leaving period of the excavated surface, sometimes requiring no formwork, facilitating the simplification of construction, leading to shortening of the construction period and improvement of safety.

Therefore, in recent years, the so-called agitator truck (green concrete car) has been actively used in the production of fluid-type or compacted-type sand protection soil cement, which can be easily manufactured and easily transported to the site. It has been requested to develop a method of manufacturing a sand and sun control soil cement that has been variously modified to facilitate construction on site.

JP-A-2015-101830

This patented invention was made in view of the above-mentioned conventional demand, and it is possible to easily utilize the so-called agitator truck (green concrete car) for the production of the sand control soil cement, and at the same time it can be produced on site It is an object of the present invention to provide a method of manufacturing an anti-soiling soil cement which has been variously improved so that it can be easily transported up to and easily constructed on site.

The present invention
It is a manufacturing method of sabo soil cement,
A step of 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, a step of storing the sorted stirring earth and sand material, and the stored stirring earth and sand material Moving into the manufacturing drum of the agitator track, carrying in the mixing agent obtained from the construction site with the liquid admixture and the cement and the mixing soil material loosened with agitation, into the manufacturing drum of the agitator track; Stirring in the production drum the stirring soil material, mixing water, liquid admixture, and cement carried in, and transporting the sand soil soil cement produced by stirring to the placement site by the agitator track And have
In the step of loosening the stored stirring earth and sand material and moving it into the manufacturing drum of the agitator track, the stored loosened stirring earth and sand material is a mesh having a pitch of 200 mm × 200 mm at the inlet. In the hopper device in which the members are stretched, the stirring earth and sand material having the diameter of 90 mm or less, which has been stored and tightened, is introduced, and the hopper device is horizontally shaken.
After loosening, a stirring earth and sand material having a diameter of 90 mm or less tightened passes through the mesh holes 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 stirring earth and sand material having a diameter of 90 mm or less moves into the hopper device and reaches a predetermined volume, the weight is measured by a measuring instrument provided in the hopper device, and the predetermined measurement value set When it becomes, 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 in diameter is configured to fall on the belt conveyor,
A plurality of belt conveyors connected in series are prepared, and the upward inclination angle of the plurality of interconnected belt conveyors is installed on an upward slope where the stirring earth and sand material having a diameter of 90 mm or less falls does not slip off ,
With the loosened soil material for stirring, the liquid admixture and cement, and the mixing water obtained from the construction site are carried into the manufacturing drum of the agitator track in the process of loading the cement, the cement is installed at the construction site. The cement stored in the cement silo which is a 30t vertical silo is input of cement from 3.5m or more to the hopper of the agitator truck with a hopper height of 3.5m, and a scaffold is placed around the silo. Control the cement damper from the scaffolding, drop it into the production drum from the mouth of the hopper, and throw it in;
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 mixing water and the liquid admixture are stored by being provided with antifreeze means.
It is characterized by

According to the present invention, the so-called agitator track (green concrete car) can be actively used for the production of flow-type or compacted-type sand protection soil cement, so that the production can be facilitated and the transportation to the site is also easy. It has an excellent effect of being able to provide a method of producing an anti-soiling soil cement that has been variously modified to be easy to construct on site.

It is structure explanatory drawing explaining the structure of this invention. It is an explanatory view explaining composition of an external hopper. It is an explanatory view explaining the introduction state of mixing water. It is an explanatory view explaining an injection state of cement. It is explanatory drawing explaining the introduction state of an admixture. It is an explanatory view explaining one example of a freeze prevention device.

Hereinafter, the best mode for carrying out the present invention will be described based on the drawings.
First, for example, at a construction site such as a mountain area where a planned construction site such as a sabo dam will be built, so-called on-site earth and sand material 3 for stirring is obtained. The riverbeds and riverbeds that promote the sabo business are often of good quality. In addition, utilizing these is effective and important not only in terms of the environment but also in terms of cost reduction.

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

  The material may be separated into stirring earth and sand material 3 having a diameter of 80 mm or less instead of the diameter of 90 mm or less. If it is earth and sand of this size, it is because there is no risk of damaging the inside of the drum 9 even if it is rotated within the drum 9 of the agitator track 8 described later and kneaded.

  In addition, about the method of the said separation, there is no limitation in any way. For example, a skeleton bucket is attached to a heavy equipment such as a backhoe, and the skeleton bucket is used as a sieve to separate it into stirring earth and sand material 3 having a diameter of 90 mm or less or 80 mm or less and other sediments. It is possible to do.

  Then, the separated soil material 3 for agitation having a diameter of, for example, 90 mm or less is temporarily stored at a predetermined place of the construction site.

  In the present invention, the production of the sabo soil cement is mainly performed by the agitator track 8. Originally, the so-called agitator track 8 is used to transport fresh concrete (fresh concrete, fresh concrete) made in a manufacturing plant called batcher plant or fresh concrete plant to construction site of civil engineering It is.

  Fresh concrete is separated even if it is not properly stirred during transportation, and aggregate and water are separated, resulting in non-uniformity. Therefore, the container is rotated slowly and transported while being stirred.

  As described above, the agitator track 8 is a vehicle that has a special structure, such as a mechanism that is movable on the bed during traveling, and that branches the drive shaft from the engine rotation shaft.

  As described above, the agitator track 8 is intended to transport while mixing pre-produced concrete and ready-mixed concrete while stirring.

  A concrete inlet called hopper 1 is provided at the front end of the drum 9 of the agitator track 8, and a chute 10 is provided at the rear end for feeding the kneaded concrete to the outside. ing. In addition, a spiral blade is attached to the inside of the drum 9, and when the drum 9 rotates, the concrete is stirred and kneaded by the blade.

  As described above, the agitator track 8 is originally used to transport fresh concrete (fresh concrete, fresh concrete) to construction sites for construction and civil engineering, but in the present invention, the agitator track 8 is used. Was used actively, not for transportation, but also for the production of sabo soil cement.

  First, a process until the separated soil material for agitation having a diameter of, for example, 90 mm or less is introduced into the drum 9 of the agitator track 8 will be described.

  In FIG. 1 and FIG. 2, the code | symbol 2 shows the hopper apparatus for weighings arrange | positioned, for example outside. At the inlet of the hopper device 2, for example, the stirred soil material 3 having a diameter of 90 mm or less is introduced. Here, a mesh member 19 having a pitch of, for example, 200 mm × 200 mm is stretched at the inlet of the hopper device 2.

  That is, the sorted soil material 3 for stirring having a diameter of 90 mm or less, for example, which has already been separated, is stored at a predetermined place of the construction site for a long time, and there is a risk that it may be slightly clogged by long time storage. Therefore, after scooping up the stirring earth and sand material 3 having a diameter of 90 mm or less tightened by a heavy machine, it is dropped to the inlet of the hopper device 2.

  At the inlet of the hopper device 2, the stirring soil material 3 having a diameter of 90 mm or less, which has been dropped and placed, has a diameter of 90 mm or less which is tightened by the hopper device 2 itself swinging horizontally, for example. The stirring earth and sand material 3 is loosened, passes through the mesh holes of the mesh member 19 and is introduced into the hopper device 2.

  By the mesh members 19 having a pitch of 200 mm × 200 mm, loosening of the sand material 3 for agitation and removal of cobbles with a diameter of 250 mm or more are performed.

Here, the means for horizontally rocking the hopper device 2 is not limited at all. For example, a hydraulic rocking device or the like can be attached to the hopper device 2 and rocked.
Further, as understood from FIG. 2, the hopper device 2 is installed on the mount 6 via, for example, the load cell 5.

  Then, when the stirring earth and sand material 3 having a diameter of 90 mm or less moves into the hopper device 2 and reaches a predetermined volume, the weight is measured by the load cell 5 and is set to the predetermined measurement value set. When the shutter door 7 is opened, the stirring soil material 3 having a diameter of, for example, 90 mm or less in diameter in the hopper device 2 is dropped onto the belt conveyor 4.

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

  Incidentally, if the inclination angle of the upward slope is made too steep for the belt conveyor 4, the agitating soil material 3 having a diameter of 90 mm or less does not move forward, and the lower side, ie, the base end portion It slips to the side. Therefore. It is important that the stirring earth and sand material 3 having a diameter of 90 mm or less be installed on an upward slope that does not slip off. Therefore, the upward inclination angle of the belt conveyor 4 is set to about 17 degrees.

  By the way, the length of the usually used belt conveyor 4 shown in FIG. 1 and FIG. 2 is about 7 m. If only one belt conveyor 4 of this length is used and installed at the above-mentioned inclination angle, it does not reach the height to the hopper 1 inlet of the agitator track 8 by far. Therefore, it is possible to stably transport the stirring earth and sand material 3 having a diameter of, for example, 90 mm or less to the hopper 1 inlet of the agitator track 8 by using two of the belt conveyors 4.

  Into the agitator track 8 are mixed the mixing and mixing water 11 and the liquid admixture 14 together with the stirring earth and sand material 3 having a diameter of 90 mm or less, for example. The mixed 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 in a mountain area which is a construction site, and mixed water 11 is procured from there. A submersible pump is placed in the puddle 12, and a predetermined amount of mixing water 11 is introduced into the drum 9 of the agitator track 8 via the flow meter 13.

  As for the liquid admixture 14, the liquid admixture 14 generated in advance at the construction site or the liquid admixture 14 is diluted in situ or the like to form the liquid admixture 14 and stored in the admixture tank 15. Then, the stored liquid admixture 14 is introduced into the drum 9 of the agitator track 8 by a predetermined amount via the flow meter 13.

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

  The cement is stored, for example, in a cement silo 20 which is an approximately 30 t vertical silo installed at a construction site. In this cement silo 20, weighing up to an upper limit of 1.0 t is possible and stored.

By the way, since the hopper height of the agitator track 8 is about 3.5 m, it is necessary to introduce cement from a point above that height.
And as an example of the method of throwing in cement, BT scaffold (about 3 m in height) is provided around the silo, and the worker controls the cement damper by remote control, and through the transparent flexible tube of φ 200 mm drum 9 from the mouth of hopper It is possible to drop it inside and throw it in.

The amount of cement used is considered to be 100 to 300 kg / m ³ × 100 m ³ = 10 to 30 t per unit cement of 100 to 300 kg / m ³ .
As described above, when the cement is finally introduced, the drum 9 is rotated and kneading of the sand control soil cement is started.

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

  6 shows the antifreezing device 16 for the mixed water 11 and the liquid admixture 14. In cold regions, it will be as low as -10 ° C in the deep winter, and in such regions, anti-soiling soil production systems require anti-freeze measures such as mixing water 11 and liquid admixture 14 etc. .

  As shown in FIG. 6, the water tank 17 storing the mixed water 11 and the admixture tank 15 storing the liquid admixture 14 are accommodated in the antifreeze device 16 and a heating device 18 such as a jet heater is used. The said mixing water 11 and the liquid admixture 14 are hold | maintained in the state which does not freeze. Then, when manufacturing the sand control soil cement in the deep winter season, the kneading temperature can be maintained at about 5 ° C., and the appropriate sand protection soil cement production status can be secured.

  Further, in order to maintain the kneading temperature of the soil erosion control soil soil at about 10 ° C., the heating device 21 is attached to the water tank 17 and the water temperature of the mixed water 11 is maintained at 40 ° C. to 50 ° C.

  By the way, although it is the earth and sand material 3 for agitation which is used as an aggregate of sabo soil cement, the maximum aggregate dimension (Gmax) is the hopper input port (φ 500 mm) of the agitator track 8 and the internal structure of the agitator track 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 transportation distance and unloading time, and it is considered that at least 3 agitator trucks 8 are required at one construction site. Be

Also, considering the mixing amount per one agitator tracks 8, per one agitator track 8, a mixed volume of 3m ^3.

And the amount of earth and sand materials for stirring is 1.6 to 2.0 t / m ³ × 3 m ³ / stand = 4.8 to 6.0 t / stand, and the cement amount is 0.1 to 0.3 t / m ³ × 3 m ³ / stand = 0.3 to 0.9 t / Table, mixing amount of water is 0.1 to 0.3 t / m ³ × 3 m ³ / base = 0.3 to 0.9 t / base, the amount of liquid admixture is 0.2 to 0.3 t × 1.5% × 3 m ³ / base = 0.9 to 13.5 kg / unit is required.

In addition, as production capacity (m ³ / hour), 3 minutes / 6 t / unit (about 5 times with 0.7 class backhoe), the time for charging the sediment material 3 for agitation into the hopper device 2 is from the hopper device 2 to the belt Feeding to agitator track 8 using conveyor 4 is 2 minutes / 6 t / unit, cement loading time (including belt conveyor loading time to silo moving time) 2 minutes / t, mixing water 11, and liquid mixing Since the agent 14 is added simultaneously with the addition of the sediment material 3 for agitation, 0 minutes, the addition time of the sediment material 3 for agitation per unit = A + B + C = 3 + 2 + 2 = 7 minutes, high speed agitation per unit of agitator track 8 Time = 3 minutes, time per cycle = A + B + C + D = 3 + 2 + 2 + 3 = 10 minutes → 12 minutes / 3 m ³ , hourly production volume = 60 minutes 12 minutes / 3 m ³ = 5 units x 3 m ³ / unit = 15 m ³ / Time.

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

  The mesh pitch is 70 mm × 70 mm, but there is a possibility that the mixing soil material 3 may not pass, so a mesh with a larger pitch, for example, a 200 mm × 200 mm mesh, is used. It is necessary to attach a horizontal rocking 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 the fall and the charge to the belt conveyor 4 of the earth and sand material 3 for agitation)
As described above, the introduction of the soil material 3 for agitation into the agitator track 8 is performed using the belt conveyor 4. In addition, it is decided to combine two ordinary flat belt conveyors because maintenance is easy and the cost is low since no special-purpose belt conveyor is used. And, in order to facilitate positioning of the two belt conveyors, the height of the gantry 6 can be adjusted. The mount 6 is preferably light and easy to fix.

  As described above, since the maximum particle shape of the stirring earth and sand material 3 is about 80 mm to 90 mm, the inclination angle of the belt conveyor 4 is an important point. That is, a common belt conveyor 4 is used, and using a plurality of them, the agitating soil material 3 on the belt conveyor 4 can be moved uphill without falling down, and the agitator can be moved. -It is important to be able to be installed so as to reach the height to the hopper 1 inlet of the truck 8.

(About the water tank 17 of the mixing water 11)
As described above, the mixed water 11 is, for example, pumped from a nearby river by a submersible pump (200 V, φ 2 inches) and stored in a water tank 17 of about 10 m ³ . A mixing / mixing water 11 of a specified amount is injected to the agitator track 8 simultaneously with the sediment material 3 for agitation via a flow meter 13.

(About the admixture tank 15)
The liquid admixture 14 is accepted as a lorry, and it is 4.000 kg at one time. At the construction site, for example, an admixture tank 15 is constructed by preparing two 2.000 liter lidded containers and one 1.000 liter container.

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

Reference Signs List 1 hopper 2 hopper device 3 soil material for stirring 4 belt conveyor 5 load cell 6 frame 7 frame 7 shutter door 8 agitator track 9 drum 10 chute 11 mixing water 12 pool 13 flow meter 14 liquid admixture 15 admixture tank 16 antifreeze device 17 Water tank 18 heating device 19 mesh member 20 cement silo 21 heating device

Claims (4)

It is a production system of sabo soil cement,
A step of 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, a step of storing the sorted stirring earth and sand material, and the stored stirring earth and sand material Moving into the manufacturing drum of the agitator track, carrying in the mixing agent obtained from the construction site with the liquid admixture and the cement and the mixing soil material loosened with agitation, into the manufacturing drum of the agitator track; Stirring in the production drum the stirring soil material, mixing water, liquid admixture, and cement carried in, and transporting the sand soil soil cement produced by stirring to the placement site by the agitator track ,
An erosion control soil cement manufacturing system characterized by having.
In the step of loosening the stored soil material for stirring and moving it into the manufacturing drum of the agitator track, a loosening member is attached to the upper surface inlet of the hopper, and the soil material for stirring moved onto the loosening member is Shake to loosen and feed into the hopper, and also feed into the manufacturing drum of the agitator track via a transfer device.
The manufacturing system of the sand protection soil cement of Claim 1 characterized by the above-mentioned.
The transfer device is composed of a plurality of belt conveyors, the stirring earth and sand material from the hopper falls onto the belt conveyor, and the plurality of falling belts of stirring earth and sand material is on the belt conveyor It is possible to install on an upslope, which can be transported by means, and the soil material for stirring is transported into the manufacturing drum of the agitator truck via the belt conveyor.
The manufacturing system of the sand protection soil cement of Claim 2 characterized by the above-mentioned.
The mixing water and the liquid admixture are stored by being provided with antifreeze means.
The manufacturing system of the sand control soil cement of Claim 1, 2 or 3 characterized by the above-mentioned.

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