JPH10317425A - Transferable excavated-soil improving device, and method and device for back-filling the soil at construction site - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improving method and device for excavated soil in a construction site, which reduces industrial waste and reduces the cost of an embedding work or a repair work for gas pipes, city water pipes, or the like. SOLUTION: This improving device 20 for excess soil is provided with a mixing means and a conveying means to use the excess soil as back-filling soil by mixing the excess soil with an improving agent to improve the soil at the construction site and further, it is provided with vehicles 30 with loading case in which the excess soil is dumped, a guide means to guide the dumped excess soil toward the end of loading case, a chuter connecting the guide means and the hopper inlet of the improving device, and a screening means 50 installed on a ditch back-filled at the underside of the discharge opening of the improved soil of the improving device 20 for excess soil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavated soil improvement apparatus for improving the soil quality of excavated soil generated during plumbing work and the like, and to a method (method) for backfilling the ground using the generated soil.

[0002]

2. Description of the Related Art Soil that has been dug up in the ground when performing burial or repair work on gas pipes, water pipes, etc., that is, "generated soil" is transferred to another place away from the construction site and discarded. Or being transported to a large plant where the soil is improved and reused. This is because the excavated excavated soil has a reduced material strength due to the fact that it contains a lot of water, and if the excavated soil is back-filled as it is, there is a possibility that land subsidence may occur. . Therefore, in order to backfill the excavated ground, high-quality soil or improved soil is transported from another location and used as backfill soil, and conversely, the generated soil is transferred to another location and subjected to disposal or improvement treatment. I have.

[0003]

Therefore, when the generated soil is discarded, it imposes a burden on the environment. In addition, it costs transportation and disposal costs to a disposal site, and the generated soil is transferred to a large-scale plant. In the case of transporting and improving the processing, transportation and processing costs are also required. In any case, it is necessary to purchase good quality soil or improved soil different from the generated soil and to carry it into the construction site, which increases construction costs.

In view of the above circumstances, the present invention reduces the amount of industrial waste and reduces the cost of burying or repairing gas pipes, water pipes, etc. And an apparatus.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a first aspect in which a soil generated at a construction site is mixed with a soil conditioner to improve the soil quality of the generated soil. And a mixing means for using as backfill soil at the construction site, and a moving means for moving the mixing means to the construction site.

[0006] In a second aspect, a mobile soil improvement device for generated soil is transferred to a construction site, and at the construction site, the soil quality of the generated soil is improved using the soil improvement device. It is characterized by backfilling the generated soil.

In a third aspect, a soil improvement device based on the first aspect, a vehicle having a packing box on which the generated soil is accumulated, and a generator mounted on the packing box and mounted on the packing box Guide means for guiding soil toward the end of the loading bed, a shooter attached to the packing box for bridging the guide means and a hopper inlet of the generated soil improvement device, and an improved soil delivery outlet of the generated soil improvement device Means for sorting the improved soil disposed on the groove to be backfilled below.

From a fourth viewpoint, (a) excavating a groove,
Accumulating the excavated soil generated by excavation, (b) supplying the accumulated excavated soil to an excavated soil improvement device installed at the excavation site, and (c) the excavated soil improvement. An apparatus for reforming the supplied generated soil, (d)
Supplying the modified soil to the excavated groove and backfilling the groove, wherein the excavated soil improvement apparatus performs the steps (a) to (d) at the excavation site. Is performed.

Preferably, in the first aspect, a moving means for moving the mixing means to a construction site is used. As the moving means, it is preferable that wheels are provided on the base on which the mixing device is mounted as described above so that the wheels can be towed or self-propelled. Alternatively, the mixing means may be loadable on the vehicle, and the mixing means may be compactly configured to be unloaded from the vehicle at the construction site.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

[Embodiment 1] FIG. 1 is a view for explaining the structure of an apparatus for improving soil generated (soil improvement apparatus) according to an embodiment of the present invention, wherein (A) is a top view, (B) is a front view, (C) is a side view. FIG. 2 is a diagram for explaining the operation of the device shown in FIG.

Referring to FIG. 1, a hopper 1 for charging earth and sand on a base 9 and a mixing drum 3 from an outlet of the hopper.
Conveyor 2, which extends obliquely upward to the entrance of the belt, a soil conditioner input device 4, which is disposed above the rear end of the belt conveyor 2 and drops a soil conditioner (lime, cement, etc.) such as lime, A mixing drum 3 and a power source (engine) 12, which rotate themselves to mix the soil and soil conditioner, are mounted. The base 9 has wheels 13, and the entire device can be moved by towing or self-propelled. Further, on the downstream side of the belt conveyor 2, the belt conveyor 2 is provided.
A control plate is provided which extends in close proximity to the moving surface of the mixing drum 3 and limits the amount of soil and the like transferred by the belt conveyor 2 and thrown into the mixing drum 3. The mixing drum 3
A plurality of iron wheels 10 are mounted on the base 9 by being connected to a power source 12 for driving the mixing drum 3 via a belt and in contact with the outer peripheral surface of the mixing drum 3 so as to rotate stably. Have been. The drive wheel 14 for the soil improving agent is engaged with the outer periphery of the mixing drum 3 and the blade 16 for the soil improving agent is introduced.
(See FIG. 5).

Referring to FIG. 2, the operation of the apparatus for improving the generated soil (mixing apparatus for soil and the like) will be described. First, this equipment is moved to a buried construction site such as a gas pipe by towing or self-propelled,
The soil generated by excavating the ground is put into the hopper 1. The earth and sand put into the hopper 1 is transferred to the belt conveyor 2
At the rear end of the belt conveyor 2, a soil conditioner such as lime falls on the earth and sand being transferred.
Subsequently, the earth and sand and the soil conditioner fall from the belt conveyor 2 to the mixing drum 3, and in the mixing drum 3,
While the earth and sand are sufficiently mixed with the soil conditioner, excess water and the like are absorbed, so that the soil is directed to the discharge port of the mixing drum 3 to be used as an improved soil usable as backfill soil. The dug ground is backfilled with the improved soil thus obtained.

Thus, at the construction site,
The generated soil is converted into improved soil, and by using this as backfill soil, no industrial waste is generated, and the generated soil is converted to an industrial waste dump or large-scale soil improvement plant that is located away from the construction site. There is no need to transport, and there is no need to purchase high quality soil as backfill soil and bring it to the construction site. Therefore, this device solves environmental problems and
It also reduces construction costs.

Here, the internal structure of the mixing drum 3 shown in FIG. 1 will be described. FIGS. 3A and 3B are views for explaining the mixing drum 3, wherein FIG. 3A is a longitudinal sectional view and FIG. 3B is a transverse sectional view. Referring to FIG. 3, a self-rotating mixing drum 3 having a cylindrical shape has mixing blades 5 that spirally advance in the rotation axis direction on an inner peripheral surface thereof. In order to maintain the strength of the mixing blade 5 and increase the mixing efficiency, the inner peripheral surface of the mixing drum 3 has a predetermined space in the flow direction in a spiral space defined by the mixing blade 5, A plurality of plates 6 are arranged at predetermined intervals on the surfaces of the mixing blades 5 which abut against each other in the direction of the rotation axis.
And are arranged vertically.

FIG. 4 is a view for explaining a modification of the internal structure of the mixing drum 3 shown in FIG. 3, wherein (A) is a longitudinal sectional view, (B) is a transverse sectional view, and (C) () Is a perspective view of the baffle plate 18. The difference from the internal structure of the mixing drum shown in FIG. 3 is that in the spiral space surrounded by the mixing blades 5 that spirally move in the rotation axis direction of the mixing drum,
That is, the baffle plate 18 is mounted on the inner peripheral surface of the mixing drum. Referring to FIG. 4 (C), the baffle plate 18 is bent and has a U-shaped plate which is arranged so as to expand to one side (downstream in the flow direction), and one side is attached to the bent portion. The bent side is made higher (the downstream side is made lower in the earth and sand flow direction), and the hypotenuse is formed of a triangular plate extending in the flow direction. By forming the baffle plate 18 in this way, the flow is cut, and more uniform mixing of the earth and sand and the soil conditioner is performed. Further, baffles of various shapes can be provided in the spiral space for uniform mixing.

The structure of the soil conditioner charging device 4 shown in FIG. 1 will be described. FIG. 5 is a longitudinal sectional view for explaining the soil conditioner input device 4. Referring to FIG. 5, soil improvement agent feeding device 4 includes a soil improvement agent hopper 15, a shooter 17 attached to an outlet of soil improvement agent hopper 15,
It comprises a soil improving agent input blade 16 disposed at an outlet inside the soil improving agent hopper 15. The rotating shaft of the soil improving agent introducing blade 16 is connected to the driving wheel 14 of the soil improving agent introducing device shown in FIG. 1, and as the mixing drum 3 rotates, the soil improving agent introducing blade 16 is rotated, and Supply a certain amount of soil conditioner.

[Embodiment 2] FIG. 6 is a view for explaining the structure of a soil improvement apparatus according to another embodiment of the present invention. Referring to FIG. 6, the difference from the first embodiment is as follows.
By increasing the installation position H of the earth and sand input device (hopper) 7 and the soil conditioner input device 4, and making the downstream portion of the earth and sand input device 7 a slope, the belt conveyor 2 shown in FIG. Then, the shooter of the soil conditioner input device 4 is made to penetrate into the downstream portion (shooter portion) of the earth and sand input device 7, and the earth and sand and the soil conditioner are directly injected from the earth and sand input device 7 to the mixing drum 3. That is, earth and sand and the like are supplied from the earth and sand input device 7 to the mixing drum 3 in a natural fall manner from the slope.

By raising the installation position H of the earth and sand input device 7 in this manner, earth and sand can be injected into the center of the mixing drum 3 and the earth and sand input device (hopper) 7 can be fed to the mixing drum 3. Means for transporting earth and sand (belt conveyor)
Is not required, the apparatus cost is reduced, and the mixing drum 3 and the power source for driving the mixing drum 3 can be increased because the means does not need to be disposed. Can be increased.

In still another embodiment, an electric motor other than the engine (internal combustion engine) may be used as a power source for driving the mixing drum and the like. Further, instead of transmitting the driving force from the power source via a V-belt (timing belt), a chain or a gear may be used.
Alternatively, a hydraulic system such as a hydraulic motor and a pump may be used. Further, as a device for transferring and charging earth and sand to the mixing drum, another transfer and charging device may be used instead of the belt conveyor shown in FIG. Further, in the above embodiment, the driving force of the device for feeding the soil conditioner is transmitted from the mixing drum, but the device is driven by using the driving force transmitting means or by an independent driving source. You may. The soil conditioner charging device that is disposed between the hopper (sediment charging device) and the drum and that inputs the soil conditioner into the generated soil charged into the hopper may be disposed above the hopper and the drum. May be arranged.

Further, with reference to FIGS. 7 to 16, a method of improving the generated soil at the site and backfilling the excavated trenches using the generated soil improvement device or the like will be described in the order of steps.

[Pre-process] First, (1) remove the rear tilt of the dump box, and (2) attach the generated soil guide means to the side tilt. That is, as shown in FIG.
The generated soil guide means 40 is attached to the packing box of the dump 30 so that the triangular plate extends obliquely from the packing box side to the packing box rear surface. As shown in FIG. 7A, the generated soil guiding means 40
The triangular plate 41 has a triangular plate 41 and a door 42. As shown in FIG.
Fixed by A door 42 is attached to one side of the triangular plate via a hinge so as to be freely opened and closed.

[Groove excavation process and generated soil accumulation process] (3) The dump 30 to which the generated soil guide means 40 (see FIG. 7) is attached is moved to the vicinity of the groove to excavate the groove. The generated soil is accumulated in the packing box of the dump 3. FIG. 9 shows a state in which the excavated soil excavated by the backhoe (shovel car) 60 arranged across the trench to be dug is accumulated in the dump.

[Groove Construction Process] (4) The dump 30 is moved to perform construction in the trench, for example, arranging gas pipes.

[Backfilling Step] (5) Next, as shown in FIG. 10, a dump 30 loaded with generated soil is disposed in parallel with the excavated trench, and a generated soil improvement device 20 is provided behind the dump 30. The net 50 is arranged on the groove and immediately below the discharge port of the drum 3 (see FIG. 1) of the generated soil improvement device 20. (6) Then, as shown in FIG. 11, the generated soil accumulated at the rear part of the packing box is pushed forward to secure a space for mounting a shooter 45 described later. The door is opened and fixed to the rear jaw by means of a vice, and a shooter 45 is attached to the portion where the door 42 is opened (fixed to the side jaw by a vice). The outlet of the shooter 45 is located on the hopper of the generated soil improvement device 20. (8) Thus, FIG.
, Tilt the packing box at a predetermined angle (particularly, see FIG. 15),
The generated soil is scraped out of the packing box of the truck 30 using a rake (see FIG. 12), and guided by the triangular plate 41 (see FIG. 7) and the shooter 45 (see FIG. 11), and the generated soil is hopper 1 of the improvement device 20. Supplied to (9) As described in detail in the above embodiment, the generated soil improving apparatus 20 mixes the generated soil with a soil improving agent (such as quicklime) to produce an improved soil. (10) The generated soil improvement device 20 feeds the improved soil onto the net 50 from the drum 3 (see FIG. 1). Stones of a specified size or more included in the sent out improved soil remain on the net 50 installed on the groove, and only the improved soil composed of particles of the specified size or less is sorted and falls into the groove. Stones remaining on the net 50 are removed as necessary. (11) After the fallen soil is piled up to a certain height in a mountain shape, the soil that has accumulated in the ditch is traced. (12) Then, when the groove is backfilled to a predetermined depth by the improved soil, the dump 30 is moved a predetermined distance along the groove. At this time, since the improvement device 20 is connected to the dump 3 by the wire 70, the dump 3
Moves with 0. Then, the net 50 also moves corresponding to the moved soil improvement device 20. Here, as shown in FIG. 16, the dumps 30 are moved and arranged at intervals of L,
Is disposed at a position at a distance P from a predetermined position of the dump 30 (for example, the driver's seat). In this way, it is better to form the pile of the improved soil at a predetermined interval and to make the mountain flatter,
0, the dump 30 and the net 50 are continuously moved, so that the working efficiency is higher.

The shooter 45 shown in FIG. 11 is preferably flexible (for example, rubber). Thereby, the vibration of the packing box and the improvement device is absorbed, and the generated soil is favorably guided into the hopper. Means for rotating or tilting the drum 3 shown in FIG. 1 in a horizontal direction or a vertical direction may be provided.
A caster may be attached to the axle to rotate the base of the soil improvement device. It is also possible to apply a device obtained by further improving the soil improvement device shown in FIG. 1 or a device having another structure to the soil improvement and backfilling method at the construction site described above. In the above embodiment,
Although a trench excavation site has been described as an example, as another embodiment of the present invention, earth and sand that has been previously accumulated and cannot be used as backfill soil as it is may be improved at the accumulation site and used as backfill soil. The excavated soil generated at one excavation site may be transferred to another site, and improved and backfilled at the other site. Even in this case, there is no need to transfer the generated soil to a large-scale plant that is usually far away from the excavation site.

[0027]

As described above, according to the present invention,
This equipment can be moved to a construction site by a mobile mixing device such as earth and sand, and the generated soil can be improved at the construction site to the extent that it can be used as backfill soil. It contributes to the reduction of waste, and it is not necessary to transport the generated soil to a disposal site or a soil improvement plant, and it is not necessary to transport high quality or improved soil of the generated soil to the construction site. This has the effect of greatly reducing the cost of burying or repairing water pipes.

By mounting a hopper or the like on the base in a predetermined relationship, necessary mechanisms are compactly arranged on the base, and the apparatus can be easily moved to a construction site.
In particular, by using a rotary drum having mixing blades inside as mixing means for soil and the like, it is not necessary to provide a separate stirring device, and its mechanical strength is high, so there are few failures, Furthermore, the mixing capacity of the improved soil is high, and the generated soil processing capacity per hour can be increased. Since the base on which the drum is mounted is provided with wheels, the device can be easily moved to the construction site. Preferably, a soil conditioner input blade that supplies the soil conditioner at a constant rate per hour is disposed inside the soil conditioner input device, so that an appropriate amount of the soil conditioner is stably supplied. In addition, since the soil improving agent introducing blade is arranged to engage with the drum, the soil improving agent introducing blade rotates together with the drum, so that a driving unit and a driving force transmitting unit for the blade are separately provided. No need. Preferably, by using a rotary drum having predetermined mixing blades and baffles, the flow of earth and sand in the drum is appropriately cut, and the earth and soil and the soil conditioner are uniformly mixed to improve the soil. Is also improved.

[Brief description of the drawings]

FIG. 1 is a view for explaining a structure of a mixing device for soil and the like according to an embodiment of the present invention, wherein (A) is a top view,
(B) is a front view, (C) is a side view.

FIG. 2 is a diagram for explaining the operation of the device shown in FIG.

3A and 3B are views for explaining the internal structure of the mixing drum shown in FIG. 1, wherein FIG. 3A is a longitudinal sectional view and FIG. 3B is a transverse sectional view.

4A and 4B are views for explaining a modification of the internal structure of the mixing drum shown in FIG. 3, wherein FIG.
(B) is a cross-sectional view, and (C) is a perspective view of a baffle plate.

FIG. 5 is a longitudinal sectional view for explaining the soil conditioner charging device shown in FIG.

FIG. 6 is a view for explaining a structure of a mixing device for soil and the like according to another embodiment of the present invention.

FIGS. 7A and 7B are views for explaining a backfill method according to an embodiment of the present invention, wherein FIG. 7A is a triangular plate for guiding generated soil, and FIG. It is a figure for explaining a device which improves and backfills soil.

FIG. 8 is a view of the packing box shown in FIG. 7B as viewed from the rear.

FIG. 9 is a view for explaining a step of accumulating generated soil according to an embodiment of the present invention.

FIG. 10 is a diagram illustrating a step of backfilling the improved soil according to one embodiment of the present invention.

FIG. 11 is a diagram illustrating a process of supplying accumulated generated soil to a generated soil improvement device according to an embodiment of the present invention.

FIG. 12 is a view for explaining a tool for supplying accumulated generated soil to a generated soil improvement device.

FIG. 13 is a view for explaining a method of continuously improving and backfilling generated soil at a site according to an embodiment of the present invention.

FIG. 14 is a diagram for explaining a method of backfilling the improved soil in the trench according to one embodiment of the present invention.

FIG. 15 is a diagram illustrating a process of supplying generated soil to a generated soil improvement device according to an embodiment of the present invention.

FIG. 16 is a diagram for explaining a state in which generated soil improvement devices are moved and arranged at predetermined intervals according to an embodiment of the present invention.

[Explanation of symbols]

 1: Hopper 2: Belt conveyor 3: Mixing drum 4: Soil improving agent charging device 5: Mixing blade 6: Plate 7: Earth and sand charging device 8: Transmission 9: Base (frame) 10: Iron wheel 11: V belt 12: Power source (engine) 13: Wheels 14: Driving wheels for soil conditioner input device 15: Hopper for soil conditioner 16: Soil improver input blade 17: Shooter 18: Baffle plate 20: Generated soil conditioner 30: Dump ( 30a: tilt 31: packing box (vessel) 40: generated soil guide means 41: triangular plate (generated soil guide means constituent member) 42: door (generated soil guide means constituent member) 43, 44: vise 45: shooter 50: Sorting means (net) 60: Backhoe (shovel car) 70: Wire (connecting means) P: Distance between predetermined position of dump and net L: Moving arrangement interval of dump

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsumi Sugimoto 4-15-3 Himonya, Meguro-ku, Tokyo Automobile Seiko Co., Ltd.

Claims (10)

[Claims] 1. Mixing means for mixing soil generated at a construction site with a soil conditioner, modifying the soil quality of the generated soil, and using the soil as backfill soil at the construction site; Means for moving the to the construction site,
A mobile generated soil improvement device comprising: 2. A hopper into which generated soil is put on a base,
The mixing means disposed on the outlet side of the hopper, and a soil conditioner charging device disposed between the hopper and the mixing means, for charging the generated soil into the hopper with a soil improving agent. The mobile generated soil improvement device according to claim 1, wherein 3. The mixing means is a rotary drum having mixing blades therein, and the rotation axis of the drum is substantially horizontal on a base having wheels as the moving means. 3. The mobile generated soil improvement device according to claim 1, wherein the device is mounted so as to be mounted on the ground. 4. A soil improving agent introducing blade for supplying the soil improving agent at a constant rate per hour is disposed inside the soil improving agent introducing device, and a rotation axis of the soil improving agent introducing blade is the same as that of the soil improving agent. 4. The movable type soil improvement device according to claim 3, wherein the device projects outside the charging device and is engaged with the outer peripheral surface of the drum. 5. A mixing blade that spirally moves in the direction of the rotation axis on an inner peripheral surface of the rotary drum, and a predetermined space in a flow direction is defined in a spiral space defined by the mixing blade. A plate disposed in contact with the surfaces of the mixing blades facing each other in the direction of the rotation axis, and a plate that is bent and expanded toward the downstream side in the flow direction in the spiral space. A plate, and a baffle plate having one side attached to the inside of the bent portion and a triangular plate extending substantially along the flow direction with a hypotenuse with the bent portion side raised, The mobile generated soil improvement device according to claim 3 or 4, 6. A mobile soil transfer device for transferring generated soil to a construction site, wherein the soil is improved using the soil improvement device at the work site, and the improved soil is filled. A method of backfilling generated soil, characterized by returning. 7. An apparatus for improving soil generated according to any one of claims 1 to 5, a vehicle provided with a packing box on which generated soil is accumulated, and mounted on the packing box and loaded on the packing box. Guide means for guiding the generated soil toward the end of the loading platform, a shooter attached to the packing box for bridging the guide means and a hopper inlet of the generated soil improvement device, and improved soil feeding of the generated soil improvement device Means for sorting the improved soil disposed on a trench to be backfilled under the exit. 8. A door mounted on the rear surface of the packing box so as to be openable and closable, and a guide provided in the packing box so as to guide the accumulated soil toward the door. The apparatus according to claim 7, further comprising a guide plate extending from a side surface to a rear surface of the box. 9. A method according to claim 7, further comprising means for connecting a vehicle having a packing box on which the generated soil is accumulated and the generated soil improvement device to each other. An improved and backfilled device. 10. A process of: (a) excavating a groove and accumulating excavated soil generated by excavation; and (b) improving the excavated soil installed and transferred to the excavation site. (C) the generated soil improvement device reforms the supplied generated soil, and (d) the generated soil improvement device excavates the reformed improved soil. Supplying the grooves and refilling the grooves, wherein the steps (a) to (d) are performed at the excavation site, and the generated soil is improved and backfilled at the site.