JP2002201665A - Self-advancing soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-advancing soil improving machine improved in stability by lowering car height and transportable between work sites without considerable disassembly. SOLUTION: A throw-in port 4a for charging soil and a soil improving agent is provided at the side of a mixer 4. The soil and the soil improving agent conveyed by a belt conveyor 50 disposed on the lower side of a first hopper 40 and a second hopper 20 can thereby be charged from the same throw-in port 4a provided at the side of the mixer 4, so that the car height can be made low. The car body is well balanced to improve the stability of the car body, and transportation between the work sites can be attained without considerable disassembly because of the low car height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for reclaiming soft soil in landfill work, general civil engineering work, etc., and viscous soil excavated in waterworks and sewerage in urban civil engineering works, gas pipe burial work, and the like. The present invention relates to a self-propelled soil improvement machine for improvement.

[0002]

2. Description of the Related Art At present, many structures such as civil engineering buildings are inevitably constructed on soft ground such as landfills due to restrictions on land use. Therefore, it has been practiced to spray a solidifying agent on soft ground to dehydrate it, and to improve the ground by compaction. In addition, in water and sewage and gas pipe burial work, it is common to bury a pipe in a trench excavated by a construction machine such as a hydraulic shovel and then backfill the trench. In the case of heavy clay or viscous soil, excavation with construction equipment such as a hydraulic excavator causes the ground to lose its supporting capacity, and the remaining soil that cannot be used for backfilling must be removed by dump truck. Become.

[0003] In order to solve such a problem, for example, Japanese Patent Application Laid-Open No. 54-58901 has been filed.
According to the gazette, a method for reclaiming remnant soil, in which viscous remnant soil that cannot be used for backfilling is supplied in a fixed amount, and a suitable soil conditioner having water-hardening properties is added at a predetermined ratio and crushed and mixed, and A residual soil transport device that transports viscous residual soil that cannot be used for soil, a rotary drive type cut screw that scrapes the residual soil transported by this transport device at an appropriate position to a predetermined layer thickness, and cuts out excess soil, There is described a technique including an addition device for supplying a fixed amount of a suitable soil conditioner having a water-absorbing property to the remaining soil to be measured in a predetermined ratio, and a mixer for crushing and mixing the remaining soil with the soil conditioner added. .

According to JP-A-7-127090,
An on-board generated soil improvement device for reusing earth and sand generated by excavating the ground with an excavator, as a replacement material suitable for backfilling, the capacity of which is larger than the amount of sediment scooped at one time by the excavator A crusher and a crusher, which crushes the soil supplied from the hopper finely and mixes it with an additive to improve the soil quality. A technique having a particle size adjusting device for sieving is described.

[0005]

However, when a solidifying agent is used for soft ground, there is a problem that a large amount of dust is generated when it is dried. Further, when the work site is a narrow place, there is a problem that many construction machines such as a vehicle for spraying the solidifying agent and a vibration roller used for compaction cannot be carried in. Further, the conventional construction method uses a large number of construction machines, and thus has a problem that the operation cost is high.

[0006] Since the apparatus for crushing and mixing the residual soil and the soil conditioner described in the above-mentioned Japanese Patent Application Laid-Open No. 54-58901 is of a stationary type, it cannot be moved between civil engineering construction work sites. If the stationary disintegrating and mixing apparatus is moved, the cost is increased due to the work of disassembly and assembly.

The wheel-type soil improvement machine described in the above-mentioned Japanese Patent Application Laid-Open No. 7-127090 is invented with a view to traveling in an urban area. It is located close to the rear of the car, making the entire car compact. For example, a power source such as an engine is disposed near a hopper into which earth and sand are charged. In such a wheel-type soil improvement machine, when earth and sand are thrown into the hopper, the rear portion of the vehicle becomes heavy, the weight balance between the front and rear of the vehicle is poor, and the stability of the vehicle is not good. Further, since a power source such as an engine is disposed near the hopper, the power source sucks dust when earth and sand are charged into the hopper, and the durability of the power source is reduced. Furthermore, there is a case where the vehicle cannot be driven on a soft ground or an uneven road surface because it is a wheel type.

Meanwhile, it is necessary that the belt conveyor provided in the self-propelled soil improvement machine does not deform and damage even when the soil and the soil improvement agent are transported.

The present invention focuses on the above-mentioned conventional problems to improve the stability of a vehicle body, improve the arrangement of a hopper for charging soil to prevent an engine or the like from sucking in dust, and improve the durability of a belt conveyor. Equipped with a mixing machine that efficiently disintegrates and disintegrates and mixes soil with a soil conditioner, such as lime, with highly moist clay or viscous soil excavated on soft ground, etc. It is an object of the present invention to provide a self-propelled soil improvement machine which has excellent transportability and mobility, and can efficiently work even on a soft land or a narrow place.

[0010]

A self-propelled soil improvement machine according to a first aspect of the present invention is a self-propelled soil improvement machine comprising a crawler-type lower traveling body, a soil and soil improvement agent. A mixer provided with an inlet on a side wall for disintegrating and mixing, a first hopper for charging soil, a second hopper for charging a soil conditioner disposed above the mixer, It is characterized by comprising a conveyor belt conveyor for conveying the soil discharged from the hopper to the mixer, and a carrying belt conveyor provided so as to be able to carry out the recycled soil discharged from the mixer. According to the above configuration, the soil can be injected from the inlet of the side wall of the mixer, so that the vehicle height can be reduced and the stability of the vehicle can be improved.

According to a second aspect of the present invention, there is provided the self-propelled soil improvement device according to the first aspect, further comprising an auxiliary device for discharging soil from the first hopper.

According to a third aspect of the present invention, in the self-propelled soil conditioner according to the first or second aspect, the conveyor belt conveyor is made of iron. According to this configuration, the iron belt conveyor receives the weight of the soil falling from the soil hopper and receives the reaction force when mixing the soil with the cutter of the mixer near the soil input port. It has enough strength to endure. Therefore, the durability is improved without the belt conveyor being deformed and damaged.

In a self-propelled soil improvement machine, a mixer having a crawler type lower traveling body and a mixer for crushing and mixing the soil and the soil improving agent, and an improved soil crushed and mixed by the mixer are externally provided. With a configuration in which a carry-out belt conveyor is carried out, the mixer is provided on the crawler-type lower traveling body, so that the vehicle can run on a site such as soft ground and can enter a narrow site. Therefore, a self-propelled soil improvement machine excellent in mobility and transportability can be obtained. In addition, when moving on the site or mounting on a trailer truck for transportation between sites, the vehicle can run by itself, so that disassembly and assembly costs such as a stationary soil improvement device are not required. Further, since the belt is provided with a belt conveyor for carrying out the improved soil, it is easy to carry out the improved soil when loading it on a transport truck or the like, and the workability can be improved. Therefore, in order to recycle soft soil and viscous soil in landfill work or general civil engineering work, etc., the body of a soil conditioner that efficiently disintegrates and mixes soil and soil conditioner and recycles soil Useful as a self-propelled soil improvement machine with greatly improved structure, solving problems with conventional soil improvement equipment (including soil improvement equipment), and greatly improving mobility, transportability, transportability and installation cost. It is.

Further, in the self-propelled soil improvement machine, the vehicle body is provided with at least one of a hopper for charging soil and a soil improving agent, and a hopper for charging soil and a hopper for charging a soil improving agent. According to this configuration, since the cradle-type lower traveling body is provided with the hopper for introducing at least soil or soil improving agent into the vehicle body having the lower traveling body, and the mixer, the vehicle can travel on the site such as soft ground, and is narrow. We can enter the spot. Therefore, a self-propelled soil improvement machine excellent in mobility and transportability can be obtained. In addition, when moving on the site or mounting on a trailer truck for transportation between sites, the vehicle can run by itself, so that disassembly and assembly costs such as a stationary soil improvement device are not required.

Further, in a self-propelled soil improvement machine, a hopper for charging soil and a soil improvement agent into a vehicle body having a crawler-type lower traveling body, and crushing and mixing the soil and the soil improvement agent discharged from the hopper. If the hopper for charging the soil improving agent is disposed above the mixer, the soil improving agent can be dropped from the hopper and supplied to the mixer. As a result, when the feed is lifted a long distance from the hopper by a feeder or the like as in the related art, the soil improver easily absorbs moisture during the transport and tends to solidify. Therefore, there is no problem that the feeder is clogged unless it is frequently cleaned. Since the supply distance can be shortened as described above, clogging does not occur, and therefore supply can be performed smoothly.

Further, a hopper for charging the soil is provided, and the hopper for charging the soil is provided outside the crawler type lower traveling body, or a hopper for charging the soil is provided, and the soil is charged. If the hopper and the unloading belt conveyor are arranged outside the crawler-type lower traveling body, a load is applied by a loading machine such as a hydraulic shovel or the like from above the soil-loading hopper. Even if the crawler-type lower traveling body is pushed into the hopper, the soil-feeding hopper is outside the crawler-type lower traveling body, so that the other side of the vehicle body is easily lifted with the soil-hopper-side end of the crawler-type lower traveling body as a fulcrum. Therefore, since an excessive force at the time of soil input is not applied to a structure such as a soil input hopper, the durability of the structure such as the soil input hopper can be improved. In addition, since the soil spilled when putting the soil into the hopper and the soil spilled from the belt conveyor for unloading do not cover the crawler-type lower traveling body, the crawler-type lower traveling body is not damaged. Can be improved in durability.

If the mixer is mounted substantially at the center of the vehicle body, the mixer is disposed substantially at the center of the vehicle body, so that the soil input hopper, the mixer, and the unloading belt conveyor are substantially linear. And the flow from the loading of the soil to the crushing, mixing and unloading becomes smooth, and the device becomes compact.

Further, if the hopper into which the soil is charged is disposed on one side in the front-rear direction of the vehicle body and the engine is disposed on the other side, the soil is disposed on one side in the front-rear direction of the vehicle body. The weight balance between the loading hopper and the engine arranged on the other side is good, and the running can be performed smoothly, so that the stability of the vehicle body is improved. In addition, since the soil hopper is located on one side of the vehicle body and the engine is located on the other side, even if dust is generated in the soil hopper, the engine is far away so it does not suck in dust. Therefore, the durability of the engine can be improved.

Further, if the vehicle body is provided with a crane, the crane is provided, so that the bag of the soil improving agent is lifted and thrown into the hopper for the soil improving agent, or when the vehicle is inspected and maintained. When installing or removing each device or cover during repair, there is no need to arrange a separate crane truck, which reduces costs and reduces
The soil improvement work can be performed on the stand. Further, these operations can be easily performed.

At this time, if the crane is provided on the side of the vehicle body outside the hopper for charging the soil improving agent, the crane can be mounted on the side of the vehicle body outside the hopper for the soil improving agent. The vehicle height, including the height of the crane, can be reduced.

Further, a soil conveyor belt conveyor may be provided from a lower side of the first hopper for charging the soil to an inlet for charging the soil into the mixer.

The first hopper for charging the soil may have a front end inclined downward as viewed from the side, and according to this configuration, the charging port of the hopper for charging the soil is provided. Since it is easy to see from the front (such as a loading machine), the work of loading the soil becomes easy and the loading workability is good.

Further, if the driving space is provided in the vehicle body, the driving space is provided in the vehicle body, so that the driving operation can be performed while observing the movement of each device or the driving operation can be performed while watching the surroundings of the vehicle. Operability is good.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a self-propelled soil improvement machine according to the present invention will be described below with reference to FIGS. First, the lower traveling body 2 of the self-propelled soil conditioner 1 shown in FIG. 1 is freely movable by a traveling motor (not shown). The vehicle body 3 is disposed above the lower traveling body 2.
The lower traveling body 2 is of a crawler type. This car body 3
A mixer 4 for disintegrating and disintegrating the soil quality improver and the soil clump is mounted at a substantially central portion of the mixer. A driving device 5 described later is mounted on one side of the vehicle body 3. On the other side of the vehicle body 3, a first hopper 40 for charging soil is provided. The front end of the first hopper 40 is inclined downward, and a spill prevention plate 41 is provided at the rear end. A second hopper 20 is provided between the first hopper 40 and the mixer 4 and on the support frame 15 fixed to the vehicle body 3 shown in FIG. Below the mixer 4 and below the driving device 5, a hydraulically driven unloading belt conveyor 16 is provided. The vehicle body 3 is provided with an operation lever 13 for operating the lower traveling body and operating each device. The total length L of the self-propelled soil conditioner 1 shown in FIG. 1 is configured to be within a range mountable on a trailer truck.

A hydraulically driven conveyor belt conveyer 50 is disposed below the first hopper 40 and the second hopper 20 on the vehicle body 3 disposed above the lower traveling body 2 shown in FIG. The belt conveyor 50 is driven in the direction of arrow a to convey the soil and the soil conditioner to the mixer 4. The cutter 4b and the rotary hammer 4c provided in the mixer 4 crush and mix the soil and the soil conditioner. A hydraulically driven unloading belt conveyor 16 is disposed below the mixer 4. The belt conveyor 16 is driven in the direction of arrow b to carry out the regenerated soil to the rear of the vehicle body. Belt conveyor 1
6, 50 can be reversed when soil clogs occur.

An engine 6 is placed on one side of the self-propelled soil improvement machine 1 shown in FIG. A radiator 7 and an air cleaner 8 are disposed in front of the direction of the engine 6, and a hydraulic pump 9 driven by the engine 6 is mounted on the rear, and a hydraulic operation valve 10 is mounted on a side of the engine 6. Have been. The drive unit 5 includes the engine 6, a radiator 7, an air cleaner, a hydraulic pump 9, and the like. A fuel tank 11 and a hydraulic oil tank 12 are arranged on the right side from the rear of the self-propelled soil improvement machine 1 from the center. Reference numeral 13 denotes an operation lever for performing a traveling operation of the lower traveling body and an operation of each device. A crane 14 is provided in front of the hydraulic oil tank 12 to supply a soil improving agent such as lime to the second hopper 20, and to perform inspection and maintenance or repair of the engine 6, the hydraulic pump 9, and various parts of the vehicle. Sometimes used, for example, for mounting and dismounting devices. Since the driving device 5 is centrally arranged on one side of the self-propelled soil improvement machine 1 as described above, inspection and maintenance is improved, and when the soil is thrown into the first hopper 40 on the other side of the vehicle body 3. Since the driving device 5 functions as a counterweight, the balance of the vehicle body is good.

The details of the second hopper 20 for charging the soil conditioner shown in FIG. 4 will be described. An openable / closable lid 22 is provided at an upper end of the second hopper main body 21, and a cutter 23 having a sharp tip is provided at an upper part in the second hopper main body 21. When the bag 51 of the soil improving agent such as lime is suspended from above by the crane 14 as shown by a thin two-dot chain line,
The bag 51 is broken by the cutter 23, and the soil conditioner falls into the second hopper body 21. An inspection window 24 for checking the remaining amount of the soil conditioner is provided on a side surface of the second hopper body 21. The second hopper body 21 has a bottom plate 25,
A soil conditioner supply device 30 is provided at the bottom.

The soil conditioner supply device 30 shown in FIGS.
Will be described. As shown in FIG.
The outer race 31 of the slewing bearing is fixedly mounted on the inner ring member 34 of the rotating body 33. As shown in FIG. 5, the drive gears 38 of the two hydraulic motors 37 mesh with the internal gear of the inner race 32 to drive the rotating body 33. A plurality of feeder blades 36 are provided between the inner ring member 34 and the outer ring member 35 of the rotating body 33 so as to form a star shape. A discharge port 26 is provided at a predetermined position of the bottom plate 25 shown in FIGS. 4 and 5 between the inner ring member 34 and the outer ring member 35 of the rotating body 33, and a shooter 27 is provided below the discharge port 26. As shown in FIG. 4, the second hopper body 2
A plate 28 is provided at the bottom of the first rotator 33 and above the rotating body 33 so as to cover the discharge port 26, and a lower edge of the plate 28
Thus, the height of the soil conditioner supplied into the space surrounded by each feeder blade 36, the outer ring member 35 and the inner ring member 34 is limited. The rotation speed of the rotator 33 can be adjusted by adjusting the rotation speed of the hydraulic motor 37, and the supply amount of the soil conditioner per unit time is adjusted by the rotation speed.

The first hopper 40 and the conveyor belt conveyor 50 will be described with reference to FIGS. As shown in FIG. 6, a conveyor belt conveyor 50 is provided below the first hopper 40 and the second hopper 20, and the conveyor belt conveyor 50 is connected to the mixer 4. The conveyor belt conveyor 50 is made of iron. The iron belt conveyer 50 uses the weight of the soil falling from the first hopper 40 and the reaction force when the soil and the soil improver are disintegrated and mixed by the cutter 4b of the mixer 4 into the soil and the soil improver. The belt conveyor has sufficient strength to receive it near the mouth 4a, and the belt conveyor is not deformed and damaged. In the side wall of the mixer 4 shown in FIG. 6, there is provided an inlet 4a into which the soil and the soil conditioner are injected. The first hopper 40 and the second hopper 20
The soil and the soil improving agent conveyed by the belt conveyor 50 disposed underneath are fed through the inlet 4a. Thus, the soil and the soil conditioner are injected from the same input port 4a on the side of the mixer 4, so that the vehicle height can be reduced. Therefore, the vehicle body is well-balanced and the stability of the vehicle body is improved, and since the vehicle height is low, the vehicle can be transported between work sites without significant disassembly.

As shown in FIG. 6, the front end of the first hopper 40 is inclined downward, and the spill prevention plate 4 is provided at the rear end.
1 is provided. As shown in FIG. 7, in the first hopper 40, the included angle α of the upper opening 42 of the hopper 40 is an obtuse angle (for example, 140 °), and the outer width W is loaded with a loading machine such as a hydraulic shovel. If large enough.
The included angle β of the guide portion 43 at the lower portion of the hopper 40 is an acute angle (for example, 30 °), so that even viscous soil with a lot of moisture easily falls. Opening 42 and guide 4
A lattice-like or net-like sieve 44 is provided at the boundary with the mesh 3 to prevent foreign matters such as large stones from entering. A seal 49 is attached to the lower edge of the guide portion 43 and abuts on the upper surface of the conveyor belt conveyor 50 to prevent dust from flowing out.

In the lower discharge portion of the first hopper 40 shown in FIG. 6, at a position at a distance T from the surface of the conveyor belt conveyor 50, a sediment discharge auxiliary comprising a rotating roller 46 having a plurality of projecting members 47 on the outer periphery. A device 45 is provided.
The earth and sand discharge assisting device 45 is of a hydraulic drive type, and rotates in the direction of the arrow d when the conveyor belt conveyor 50 moves in the direction of the arrow c, and discharges the soil when the soil moisture is large and slips on the belt. It is easy to do. A shooter 27 of the second hopper 20 for charging the soil conditioner is disposed behind the earth and sand discharge auxiliary device 45. The tip of this shooter 27 is set at a height of a distance “T + t” from the surface of the conveyor belt conveyor 50. An earth and sand quantitative supply device 48 is provided between the earth and sand discharge auxiliary device 45 and the shooter 27, and limits the height of the earth and sand at a lower edge thereof. The iron belt conveyor 50 has sufficient strength to withstand the reaction force generated when the projecting member 47 rotates and discharges the soil by driving the rotation roller 46 of the earth and sand discharge assisting device 45, and the belt conveyor is deformed. No damage.

Next, the soil improvement work will be described with reference to FIG. As shown in the figure, a hydraulic excavator 52 having a bucket 53 is arranged on the first hopper 40 side of the self-propelled soil improvement machine 1, and the hydraulic excavator 52 and the self-propelled soil The crawler type working machine of the improved machine 1 is used. The soil whose soil quality has been improved is transported by a portable belt conveyor 54 and loaded on a wheel-type dump truck 55 arranged on a favorable road surface.

The self-propelled soil conditioner 1 lifts the bag 51 of the soil conditioner by the crane 14 and throws the soil conditioner into the second hopper 20. The excavator 52 excavates soil with a bucket 53 and throws the soil into the first hopper 40. At this time,
As described above, the width W (see FIG. 7) of the first hopper 40 is sufficiently large, so that the first hopper 40 can be easily inserted. Further, the sieve 4 of the first hopper 40
Because of the presence of 4, the foreign matter such as a large stone can be removed. On the contrary, when the soil is a clay having a large amount of water, it may be difficult to put the clay.
In this case, the soil is pushed into the back of the bucket 53. At this time, a force is applied to the first hopper 40 in the direction of F. However, since the first hopper 40 is disposed outside the lower traveling body 2, the rear part of the self-propelled soil conditioner 1 is lifted around the point P, and the force F is limited. Therefore, no excessive force is applied to the first hopper 40, and there is no danger of damaging structures such as the support frame 15. The soil introduced into the first hopper 40 is added with an appropriate amount of soil improving agent on the conveyor belt conveyor 50 as described above, and is crushed and mixed by the mixer 4 to be improved into reusable soil. The improved soil is sent to the portable belt conveyor 54 by the unloading belt conveyor 16 and is mounted on the dump truck 55 to complete a series of operations.

According to the self-propelled soil improvement machine of the present invention, the weight balance between the engine and the hydraulic pump provided on one side of the vehicle body and the first hopper (earth hopper) provided on the other side is achieved. Since the vehicle can run smoothly and smoothly, the stability of the vehicle body is improved. Also, the structure is such that one side of the vehicle body is lifted even when the earth or the like is pushed in by applying a force from a construction machine such as a hydraulic shovel or the like from above the first hopper disposed on the other side of the vehicle body. Excessive force is not applied, and the durability of the structure such as the first hopper is improved. Furthermore, since the first hopper is disposed on one side of the vehicle body and the engine and the hydraulic pump are disposed on the other side, even if dust is generated in the first hopper, the dust is not sucked because the engine is away from the first hopper. The durability is improved.

Since the iron belt conveyor is provided, even if the weight of the soil falling from the first hopper is received, the reaction force when mixing the soil and the soil improving agent by the cutter of the mixer is used to reduce the soil force. The belt has sufficient strength to withstand near the inlet of the improver, and the belt conveyor is not deformed and damaged, and the durability is improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a self-propelled soil improvement machine of the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of a second hopper into which the soil conditioner is charged,
It is a partial sectional view.

FIG. 5 is a plan view of the soil conditioner supply device, as viewed in the direction of arrows AA in FIG. 4;

FIG. 6 is a side sectional view of the vicinity of the first and second hoppers and a conveyor belt conveyor.

FIG. 7 is a front cross-sectional view of the first hopper, as viewed in the direction indicated by arrows BB in FIG. 6;

FIG. 8 is an explanatory diagram of soil improvement work using the self-propelled soil improvement machine of the present invention.

[Explanation of symbols]

1. Self-propelled soil improvement machine, 2. Lower traveling body, 4. Mixer,
4a ... Inlet, 4b, 4c ... Cutter, 5 ... Driver, 6
... Engine, 9 ... Hydraulic pump, 13 ... Operation lever for traveling, etc., 14 ... Crane, 16 ... Conveying belt conveyor, 2
0: second hopper, 22: lid, 23: cutter, 25: bottom plate, 26: outlet, 27: shooter, 28: plate,
Reference numeral 30: soil conditioner supply device, 33: rotating body, 36: feeder blade, 37: hydraulic motor, 40: first hopper,
41: soil spill prevention plate, 44: sieve, 45: earth and sand discharge assisting device, 48: earth and sand quantitative supply device, 50: conveyor belt conveyor.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoichi Komoriya 2-3-6 Akasaka, Minato-ku, Tokyo Komatsu Ltd. Environment and System Business Unit F-term (reference) 2D040 AB07 AC05 CA03 CA03 CD07 EB04

Claims (3)

[Claims] A self-propelled soil improvement machine comprising: a crawler-type lower traveling body (2); a mixing machine (4) which disintegrates and mixes soil and a soil improvement agent, and has an inlet (4a) provided in a side wall. 4), a first hopper (40) for charging the soil, a second hopper (20) for charging the soil conditioner disposed above the mixer (4), and the first hopper (40). The discharged soil is mixed with the mixer (4)
A self-propelled belt comprising: a conveyor belt conveyor (50) for conveying the reclaimed soil discharged from the mixer (4); Type soil improvement machine. 2. The self-propelled soil improvement machine according to claim 1, further comprising a sediment discharge auxiliary device (45) for promoting discharge of soil from said first hopper (40). A traveling soil improvement machine. 3. The self-propelled soil improvement machine according to claim 1, wherein the conveyor belt conveyor (50) is made of iron.