JP2000345578A - Device and method of manufacturing superplasticized soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase throughput even in a small-sized manufacturing device, and to reduce manufacturing cost. SOLUTION: The manufacturing device 1 for superplasticized soil is constituted by loading a treated-soil hopper 4, a conveyor 10 conveying treated soil, an improvement-material hopper 20, an improvement material feeder 21, a crushing mixing section 30, a kneading section 40 and a water feeder 50. Treated soil conveyed by the conveyor 10 and an improvement material fed from the improvement material feeder 21 are crushed and mixed by the crushing mixing section 30 and a mixed material is manufactured, and the mixing material is supplied with water or sludge from the water feeder 50 and kneaded by the kneading section 40 and superplasticized soil is manufactured. It is desirable that these each equipment and driving source are loaded on a frame 3 with a travelling section 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for producing fluidized soil used for soil improvement of residual soil generated at a construction site or the like.

[0002]

2. Description of the Related Art In recent years, there has been a case where a hole excavated on a road or a construction site is easily backfilled with excavated soil so as to be able to re-excavate. In this case, excavation is performed to facilitate excavation at the time of re-excavation or to secure soil strength of a predetermined level or more after backfilling a place where a pipeline or the like is buried using excavated soil. Water or muddy water and a solidifying agent (for example, cement) are kneaded into the soil to produce a slurry-like backfill material, that is, a fluidized soil, poured into the excavation hole, and naturally solidified to secure a predetermined strength. The way to be done.

Conventionally, various methods have been used to produce fluidized soil used for backfilling. As a first example, there is a case where a fluidized soil is manufactured by a large-scale plant constructed at a predetermined base in an area. In this case, first, after mixing the remaining soil and water, large foreign substances and the like are removed, and then muddy water and a solidifying agent are added and kneaded to produce a fluidized soil. After that, the fluidized soil is transported to many backfill sites around the base by a mixer truck or the like to perform backfill work. As a second example, there is a method in which the above-mentioned plant is temporarily installed near the backfill site, and fluidized soil is produced exclusively for the site.

Further, as a third example, see, for example,
There is one disclosed in 195253. According to the official gazette, a soil-injection bucket, a premixer, and a main mixer are mounted on a gantry of a vehicle, and a water supply from a water tanker and a supply of solidified material are received and kneaded near a backfill site. Manufactures fluidized soil.

[0005]

However, in the above-mentioned conventional apparatus and method for producing fluidized soil,
There are the following problems. 1) In the first example, since the plant is large,
It is often constructed at a predetermined base remote from the backfill site, and therefore, it is necessary to transport the manufactured fluidized soil to a surrounding backfill site many times by a mixer truck. However, since the fluidized soil is so-called "raw" mixed with cement, it is difficult to transport the soil to a distant place. (For example, transporting a distance of about 20 km in a city center is almost the limit.) In addition, transporting by a mixer truck is expensive. Furthermore, since the soil and the water are simply mixed, it is difficult to mix them uniformly, and it takes a long time to produce the fluidized soil. However, there is a problem that it takes a long time to manufacture and the working efficiency of the manufacturing is not good. On the other hand, at the site of backfilling, costs for externally processing the remaining soil generated are required, which increases the work cost at the site. 2) In the second example, since the plant is temporarily backfilled near the site, there is a problem that the transportation cost, the assembling cost, the disassembly cost, and the like of the plant are high and the cost is increased. 3) In the third example, the manufacturing apparatus is downsized so that it can be mounted on a vehicle, and since the fluidized soil is manufactured in a batch system, the processing capacity of the manufacturing apparatus is small. As a result, work cannot be performed efficiently in the case of large-scale construction.

An object of the present invention is to provide an apparatus and a method for producing a fluidized soil which can be processed with a large amount of processing even at a small size and at a low manufacturing cost.

[0007]

In order to achieve the above object, a first invention of a fluidized treated soil manufacturing apparatus according to the present invention comprises the steps of introducing a treated soil for a fluidized treated soil. A soil hopper to be treated, a transport device for transporting the soil to be treated by the soil hopper to be treated, an improved material hopper into which the improved material is charged, and an improved material supply device to supply the improved material to the improved material hopper. Crushing and mixing unit that crushes and mixes the soil to be treated and the improved material, a water supply device that supplies water or muddy water to the mixed material of the soil to be processed and the improved material, and a kneading unit that kneads the mixed material and water or muddy water And a configuration including:

According to the first invention, the soil to be treated of the soil hopper is conveyed by the conveying device, the improvement material of the hopper is supplied by the supplying device, and the soil and the improvement material are crushed and mixed. The mixture is finely crushed and mixed, and water or muddy water is supplied to the mixed material.Then, the mixed material and water or muddy water are kneaded in the kneading unit to produce fluidized treated soil. It becomes possible to produce chemically treated soil. At this time, since the finely crushed mixed material is kneaded with water or muddy water, it is easily kneaded uniformly with water or muddy water, and the fluidized soil is produced continuously in a short time. Therefore, even a small apparatus requires a large amount of processing, and can cope with a large-scale construction. In addition, since the present fluidized soil production equipment can be installed near the backfill site more easily than in a conventional plant, the transport of the fluidized soil by a mixer truck becomes unnecessary, and the transportation cost and the assembly of the plant are eliminated. Costs and disassembly costs can be eliminated, and construction costs can be reduced. Furthermore, since the fluidized soil can be produced at the backfill site, the remaining soil generated at the site can be used, and the cost can be further reduced.

A second aspect of the invention is based on the configuration of the first aspect, wherein the kneading section is provided below the crushing and mixing section.

According to the second aspect, the kneading section is provided below the crushing and mixing section, so that the entire fluidized soil production apparatus is reduced in size and configured to be compact. Therefore, installation and transportation to the backfill site are easy, and assembly and disassembly of the plant are not required, so that the cost can be reduced.

A third invention is based on the construction of the first or second invention, and further comprises the above-mentioned soil hopper, a transfer device, an improvement material hopper, and an improvement material supply device mounted on a gantry having a self-propelled traveling unit. , A crushing / mixing unit, a water supply device, a kneading unit, and a drive source for driving these devices and the traveling unit.

According to the third aspect of the present invention, since the equipment and power source for producing the fluidized soil are mounted on the pedestal having the self-propelled traveling part, the self-propelled machine at the backfill site has the highest working efficiency. The device can be easily moved to a good place. Therefore, the labor of assembling and disassembling is not required, and the working efficiency can be improved, so that the handling is easy and the cost can be reduced.

In the method for producing fluidized soil according to the present invention, the soil to be treated and the improving material are crushed and mixed to produce a mixed material, and then water or muddy water is supplied to the mixed material and kneaded. Then, the method is to produce a fluidized soil with improved soil quality.

According to the above method, first, the soil to be treated is crushed and mixed in a state where the improving material is added to the soil to be treated, so that the soil to be treated is easily finely crushed and mixed without water. Therefore, the mixing with the improving material is performed uniformly in a short time. In addition, since water or muddy water is supplied to this mixed material and kneaded,
The kneading efficiency is higher than the conventional method, the kneading time is shortened, and the operation of producing fluidized soil can be continuously performed. Therefore, from the above, the working efficiency is improved, and the fluidized soil with stable quality can be easily produced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fluidized soil production apparatus and a production method thereof according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side view of an apparatus for producing fluidized soil according to the present invention. As shown in the figure, the fluidized soil production apparatus 1 is a self-propelled type, and appropriately manufactures fluidized soil by adjusting the timing of kneading soil and water appropriately. A to-be-processed soil hopper 4 for charging the to-be-processed soil is mounted on one side in the longitudinal direction of a gantry 3 having a crawler-type traveling unit 2, and a crushing / mixing unit 30 is provided at the center of the gantry 3. A lower discharge port 5 is provided at a lower portion of the soil hopper 4, and a transfer device 10 for mounting the soil to be transported to the crushing and mixing unit 30 is provided below the lower outlet 5. An improvement material hopper 20 is provided above the soil hopper 4 to be treated and the crushing / mixing unit 30, and a lower portion of the improvement material hopper 20 is provided with a controllable amount of the improvement material to be supplied to the transport device 10. An improved material supply device 21 of the type is provided. Crushing and mixing section 30
Crushes and mixes the soil to be treated and the improving material carried in by the transport device 10, and has a water supply device 50 for supplying water to the mixed material. Further, a kneading section 40 for kneading the mixed material and water is provided below the crushing and mixing section 30. An outlet 4 is provided at the end of the kneading section 40.
1 is provided, and a squeeze-type concrete pump 60 is provided outside the outlet 41. A delivery pipe 62 for directly delivering fluidized soil to a backfill location is connected to an outlet 61 of the concrete pump 60. On the other side of the gantry 3 in the longitudinal direction, a transport device 10 and an improved material supply device 2
1, a power source 70 for driving the crushing and mixing unit 30, the kneading unit 40, the water supply device 50, the traveling unit 2, and the like. Note that the traveling unit 2 may be a wheel type.

FIG. 2 is a configuration diagram of the crushing and mixing section 30.
An opening provided in the side surface of the mixing case 31 has a transfer device 1
In the upper part of the mixing case 31 and in the vicinity of the distal end of the transfer device 10, a soil cutter 32 having a predetermined number of cutters is rotatably disposed on the outer peripheral portion of the rotating unit main body. ing. A plurality of rotary hammers 33 each having a rotatable hammer at the tip of a predetermined number of arms provided on the outer peripheral portion of the rotating portion main body are provided below the soil tutter 32 so as to be rotatable. Further, below the crushing and mixing section 30, the kneading section 40 of the first embodiment is provided. The kneading section 40 has a kneading case 42 provided below the mixing case 31 and a plurality of screw-type mixers 43 rotatably provided in parallel with the kneading case 42. Is drive motor 4
4 is driven to rotate. Above the screw-type mixer 43, a plurality of nozzles 51 of the water supply device 50 are provided. Further, an outlet 41 is provided at an end of the kneading case 42.
The squeeze-type concrete pump 60 is disposed outside the outlet 41 as described above. Note that the nozzle 51 of the water supply device 50 may be provided above the mixing case 31.

FIG. 3 is a schematic view of the transport device 10 according to the first embodiment. The transport device 10 has a motor 16 provided at one end and a conveyor 11 driven by the motor 16, and the conveyor 11 is provided with a conveyor scale 12. The conveyor 11 is configured by a belt type, a crawler type, or the like. A scraping rotor 6 is attached to the soil hopper 4 to regulate the height of the soil A to be transported on the conveyor 11, and the conveyor scale 12 is moved by the conveyor scale 12. Detect the weight of the treated soil.

FIG. 4 is a system diagram of the water supply device 50.
A water pump 53 driven by a motor 52 is connected to a water source 54. A plurality of nozzles 51 are provided at the tip of a discharge circuit 55 of the water pump 53, and a flow meter 56 and a valve 57 are provided on the discharge circuit 55. The amount of water is controlled by a valve 57 in accordance with the amount of the mixture, and the amount of water is detected by a flow meter 56. Note that the amount of water may be detected based on the rotation speed of the water pump 53.

Next, the operation of the fluidized soil production apparatus 1 will be described with reference to FIGS. In FIG. 3, the soil to be treated, which has been subjected to a pretreatment for removing large rocks, steel frames, concrete debris, etc. from the remaining soil generated at the site, is loaded into the soil to be treated hopper 4 by a loading machine such as a hydraulic shovel. . Next, the soil A to be treated is crushed and mixed by the
Transport to The supply speed and the integrated supply amount of the soil A to be processed conveyed by the conveyor 11 are detected from the conveyor scale 12 and the rotation speed of the motor 16. The number of rotations of the motor 16 is controlled so that the supply amount per unit time becomes a predetermined value. Next, the improving material supply device 21 uses an improving material B by a tachometer (not shown) provided in the improving material supplying device 21.
The supply speed (for example, cement) and the integrated supply amount are detected, and the improving material is supplied so as to have a preset mixing ratio with the soil to be treated.

Next, in FIG. 2, the soil A to be treated and the improved material B conveyed to the crushing and mixing section 30 by the conveyor 11
Is finely cut and mixed by a soil cutter 32, and then further finely crushed and further mixed by a rotary hammer 33 to form a mixed material C. Water is supplied to the mixed material C from the water supply device 50. At this time, the water supply speed and the integrated supply amount are detected by the flow meter 56, and the soil A to be treated, the improved material B
And the amount of water according to the amount of the mixed material C is supplied. Mixed material C
The water and the water are sent to the kneading case 42, in which the mixture C and the water are kneaded by the screw mixer 43 to produce the fluidized soil D in the form of slurry. The manufactured fluidized soil D is discharged from the discharge port 41 while being kneaded by the screw mixer 43 and sent to the concrete pump 60. The concrete pump 60 pressure-feeds the fluidized soil D from the outlet 61 through the delivery pipe 62 to the backfill location, and the backfill work is performed. In addition, depending on the work, road shoulders, embankments of rivers, and the like are performed.

As described above, in the production of fluidized soil, first, a mixed material is prepared by finely crushing and mixing the soil to be treated and the improved material, and then kneading by adding water. As a result, the mixed material is well dissolved in water, the kneading time is shortened, and the fluidized soil can be manufactured in a short time. In addition, since the supply speed and the integrated supply amount of each of the soil to be treated, the improving material, and water are detected, and the respective supply amounts are controlled by the respective motors so as to have a predetermined mixing ratio, high-quality fluidization treatment is performed. The soil can be manufactured continuously. Therefore, construction management at the work site is facilitated, and work efficiency can be improved.

FIG. 5 is a schematic view of a transfer device 10a according to the second embodiment. The treated soil hopper 4 is provided with a leveling plate 7 for defining the height of the treated soil A on the conveyor 11, and above it, the height of the treated soil A on the conveyor 11 is measured without contact. Soil height detector (ultrasonic sensor etc.) 13
Is provided. Guide wheel 1 at one end of conveyor 11
A conveyor speed detector (encoder) 15 is attached to 4, and the height of the soil A detected by the soil height detector 13 and the speed of the conveyor 11 detected by the conveyor speed detector 15. , The supply speed of the conveyed soil A to be conveyed and the integrated supply amount are detected. In the second embodiment, the transfer device 10
a may be a belt type or a track type.

FIG. 6 is a schematic view of the kneading section 40a of the second embodiment. A paddle type mixer 43 is provided in the kneading case 42.
a is rotatably mounted. The other configuration of the kneading unit 40a is the same as that of the first embodiment, and the description is omitted.

FIG. 7 shows another configuration example of the discharging means connected to the discharging port 41 of the kneading section 40. In this configuration, the trough 63 is connected to the discharge port 41, and the fluidized soil discharged from the discharge port 41 is conveyed to the backfill location along the trough 63 as shown by the arrow in the figure. This is used when a work site such as backfilling or embankment is in the vicinity of the fluidized soil production apparatus 1. According to the present invention, no concrete pump is required, and the manufacturing cost can be reduced.

As described above, in the fluidized soil manufacturing apparatus according to the present invention, the soil to be treated and the improving material are finely crushed and mixed to prepare a mixed material, and then water is added and kneaded. In addition, the mixing material dissolves well in water, the kneading time is shortened, and the fluidized soil can be manufactured in a short time. In addition, since the soil to be treated, the improving material, and the water are each controlled to an appropriate amount so as to have a predetermined mixing ratio, a high-quality fluidized treated soil can be continuously produced. As a result, the fluidized soil production apparatus according to the present invention has a large amount of processing even if it is small, and can cope with large-scale construction. In addition, because it is small and self-propelled,
It can be installed at the place with the highest working efficiency near the work site such as backfilling and embankment, so that it is not necessary to transport the fluidized soil from a remote plant, so that the transportation cost can be reduced. Furthermore, since the installation cost is lower than when a temporary plant is constructed around the work site such as backfilling and embankment, it is economical. In addition, since it can be installed near the work site, the work efficiency is good, the remaining soil can be easily used, and the construction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a fluidized soil production apparatus of the present invention.

FIG. 2 is a configuration diagram of a crushing and mixing unit of the present invention.

FIG. 3 is a schematic diagram of a transport device according to the first embodiment of the present invention.

FIG. 4 is a system diagram of a water supply device of the present invention.

FIG. 5 is a schematic view of a transfer device according to a second embodiment of the present invention.

FIG. 6 is a schematic view of a kneading unit according to a second embodiment of the present invention.

FIG. 7 is a diagram showing another configuration example of the discharging means connected to the discharging port of the kneading section of the present invention.

[Explanation of symbols]

1: fluidized treated soil production equipment, 2: running section, 3: mount,
4: soil hopper to be treated, 5: lower discharge port, 6: scraping rotor, 7: leveling plate, 10: conveyor, 11: conveyor, 12: conveyor scale, 13: ultrasonic sensor, 20: improved material hopper , 21: improvement material supply device, 3
0: crushing and mixing section, 31: mixing case, 40: kneading section, 4
1: outlet, 42: kneading case, 43: screw-type mixer, 43a: paddle-type mixer, 50: water supply device, 5
1: Nozzle, 56: Flow meter, 57: Valve, 60: Concrete pump, 62: Delivery pipe, 63: Thread, 70: Drive source.

Claims (4)

[Claims] 1. A soil hopper (4) into which soil to be treated for fluidized soil is introduced, a transport device (10) for transporting soil to be processed by the soil hopper (4), and an improvement material Material hopper (20) into which the material is fed, an improving material supply device (21) for supplying the improving material of the improving material hopper (20), and a crushing / mixing unit for crushing and mixing the supplied soil to be treated and the improving material. (30), a water supply device (50) for supplying water or muddy water to the mixture of the soil to be treated and the improving material, and a kneading section (40) for kneading the mixed material with water or muddy water. Characterized by a fluidized soil production equipment. 2. The fluidized soil production apparatus according to claim 1, wherein the kneading section (40) is provided below the crushing and mixing section (30). 3. A pedestal (3) having a self-propelled running part (2) in the fluidized soil production apparatus according to claim 1 or 2.
Next, the soil hopper to be treated (4), a transport device (10), an improving material hopper (20), an improving material supplying device (21), and a crushing and mixing unit (3
0), a water supply device (50), a kneading unit (40), and a drive source (70) for driving these devices and the traveling unit (2). manufacturing device. 4. A mixed material is manufactured by crushing and mixing the soil to be treated and the improving material, and then water or muddy water is supplied to the mixed material and kneaded to produce a fluidized treated soil having improved soil quality. A method for producing a fluidized treated soil, comprising: