JPH11256565A - Soil improving machine with excavating mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately and efficiently improve subsoil up to a predetermined depth, without adversely affecting the surroundings, by making it possible to continuously prepare high-quality improved soil in which soil and a soil improver are uniformly mixed together by use of a single vehicle. SOLUTION: An upper structure 3 fitted at its front part with a front working mechanism 10 or the like which serves as an excavation means having a bucket 15 is installed on a main frame 2 provided with a traveling means 1 having a crawler 7, and a soil improving mechanism 9 is installed at the rear of the main frame 2. The soil improving mechanism 9 comprises an earth/sand input part 20, a continuous processing vessel 21, a hopper 22, a soil improver transfer means 23, and a discharge means 24, and the earth and sand excavated by actuation of the front working mechanism 10 are put into the upper chamber of the continuous processing vessel 21 from the earth/sand input part 20. During the shift of the earth and sand from the upper chamber to a lower chamber, a soil improver is supplied from the hopper 22 to the continuous processing vessel 21 via the soil improver transfer means 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil improvement machine with an excavation mechanism used for excavating soil at a predetermined location at a civil engineering site or a construction site, improving the soil quality of the excavated soil, and backfilling the soil. It is about.

[0002]

2. Description of the Related Art Conventionally, as a method for improving a soft ground to a solid ground, there is a conventional method in which a soil improving material such as cement is mixed with the soil constituting the ground and solidified. Known from. In this method, earth and sand that compose the ground are dug up to a predetermined depth, cement and other soil improvement materials for solidification treatment are uniformly mixed with this earth and sand, backfilled and leveled, and finally tightened. It is common practice to consolidate. This soil improvement method requires a means for excavating the earth and sand, a means for supplying the soil improvement material, a means for uniformly mixing the excavated soil and the soil improvement material, and a means for leveling and compacting. .

Here, in the soil improvement method, at least a means for excavating earth and sand is required. As the excavating means, a hydraulic excavator can be generally used. The traveling means of the hydraulic shovel include a crawler type using a crawler belt and a wheel type having wheels. In general, the ground at a work site is soft and has uneven terrain. However, it is preferable to use a crawler type using a crawler belt as the traveling means in view of poor traveling conditions, the necessity of securing the stability of the vehicle body due to digging resistance, and the like.

[0004] Next, an improved soil is produced by supplying a soil improvement material and uniformly mixing it with the earth and sand. The method of producing the improved soil is roughly divided into stirring and mixing using a mixing device. Conventionally, a method of mixing soil and soil improving material by spraying the soil improving material on the ground and then digging and digging the soil to stir the soil has been used.

[0005] The mixing apparatus includes, at a minimum, a mixing tank equipped with a stirring means and a means for supplying a soil improvement material. And earth and sand are thrown into a mixing tank, and since earth and sand excavation is performed by a hydraulic shovel, earth and sand can be thrown directly into a mixing device from this hydraulic shovel. However, since the positional relationship between the excavation position of the excavator and the arrangement position of the mixing device constantly changes, and because the excavated soil may contain solid foreign matter such as rock, metal, and glass. Generally, earth and sand excavated by a hydraulic shovel is deposited on a predetermined portion, and the accumulated earth and sand is generally taken in. Here, as this type of mixing device, for example, a device disclosed in Japanese Patent Publication No. 1-49538 is known. This mixing device is configured as a self-propelled mixing device that includes a sediment supply mechanism having a bucket for supplying sedimentary sediment, a mixing tank and a supply unit for soil improvement material, and includes wheel-type traveling means. The earth and sand supply mechanism is rotatable in a horizontal direction by a limited angle on the vehicle body. Further, a conveyor means for conveying the earth and sand from the earth and sand supply mechanism to the mixing tank is also provided. Then, in this mixing tank, after putting a certain amount of earth and sand and a certain amount of soil improvement material, an improved soil is generated by stirring and mixing with a stirring means, and discharged to a predetermined position. Processing is performed in a batch system.

[0006] On the other hand, in a method in which a soil improvement material is sprayed on the ground and mixed with earth and sand, the soil improvement material is sprayed, and then the earth and sand are excavated to be stirred and mixed. In this case, the stirring and mixing of the soil and the soil improving material can be performed by using an excavating mechanism having a bucket in a hydraulic shovel, but it is necessary to uniformly stir and mix the soil and the soil improving material over a wide area. Is difficult and requires a high degree of skill. A method of uniformly stirring and mixing the soil improvement material sprayed by using this kind of excavation mixing stirring means with earth and sand is disclosed in, for example, Japanese Utility Model Laid-Open No. 56-733. This known drilling mixing and stirring means includes a rotor having a number of cutters radially connected to a rotating shaft,
As a front attachment in a front working mechanism of a hydraulic shovel, it can be attached to a tip of an arm provided in connection with a boom. Then, while the hydraulic excavator is running, the cutter in the rotor is pressed against the ground by operating the boom and the arm, and the rotary shaft is rotated to drive the cutter to dig up the earth and sand. Can be mixed with earth and sand.

[0007]

Among the conventional methods described above, in the method of generating improved soil by using a self-propelled mixing device, the soil improvement processing of the earth and sand by the mixing tank is performed by a batch method. Therefore, the apparatus configuration is unsatisfactory in terms of processing capacity, and because it is not possible to supply earth and sand directly to the mixing tank from the earth and sand supply mechanism consisting of buckets, it is necessary to provide conveyor means for transporting earth and sand, etc. Is complicated, and since it is a wheel type vehicle, it is not possible to directly excavate earth and sand. Therefore, there is a problem that another machine such as a hydraulic excavator must be used to excavate earth and sand. On the other hand, in the method using the excavation mixing and stirring means, there is no need to excavate and sediment the earth and sand, and since the continuous treatment is performed, the processing capacity is high. And adversely affect the surrounding environment,
There is a problem that it is not suitable for work in densely populated houses or the like, such as generation of noise when the rotor is driven. In addition, the excavation depth depends on the length of the cutter, and there is a limit to the length of the cutter that can be used. The length of the cutter currently used is about 1 m at the longest, and there is a problem that it is not suitable for ground improvement up to a deeper portion.

The present invention has been made in view of the above points, and it is possible to continuously produce high-quality improved soil in which soil and a soil improvement material are uniformly mixed by a single vehicle, and to improve the surrounding environment. It is an object of the present invention to accurately and efficiently improve the soil up to a desired depth without adversely affecting soil.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a frame for a traveling vehicle having a lower traveling body provided with traveling means having a pair of right and left crawler tracks in a traveling direction in the traveling direction. An upper revolving body is provided at a side position via a revolving device so as to be revolvable, and at least an excavation means for earth and sand, a driving means therefor, and a driver's cab are installed on the upper revolving body. A continuous treatment tank with one or more conveyors equipped with a stirring mechanism installed at a position that does not interfere with the turning radius of the body, a hopper for storing soil improvement material, and a soil improvement material from this hopper to the continuous treatment tank. And a soil improving mechanism having a soil improving material transferring means for transferring the soil.

Here, this machine enables excavation of earth and sand. When excavating earth and sand, an excavation resistance acts. In order to prevent the whole vehicle from becoming unstable due to the excavation resistance, it is preferable that a soil improvement mechanism including a continuous treatment tank provided at a position behind the frame is made to function as a counterweight for the excavation means. Therefore, the position of the center of gravity in the frame of the partial running body is a portion where the crawler belt is in contact with the ground, and the frame and each device or member installed in the frame are properly positioned so that the crawler belt is located at the center or at a position behind the center. Let it be placed.

In the continuous treatment tank, the earth and sand and the soil improvement material are uniformly stirred and mixed while being conveyed. For this reason, a certain lengthwise dimension is required. Because the soil improvement mechanism and the upper revolving superstructure are located before and after the frame, if the length of the continuous treatment tank is long, the overall length of the traveling vehicle will be extremely long, which will hinder turning in narrow places. Sometimes. Therefore, in order to reduce the length of the continuous processing tank in the length direction and still allow sufficient stirring and mixing, a partition wall is provided at a substantially middle position in the vertical direction in the continuous processing tank, and the upper and lower two stages are provided. The chambers may be divided into chambers, and a conveyor with a stirring mechanism may be provided in both chambers. The upper chamber and the lower chamber communicate with each other on the front side in the transport direction by the conveyor with the stirring mechanism in the upper chamber. In addition, if a wide-mouthed earth and sand input section is provided on the upper chamber, earth and sand can be easily input from the excavating means.

Further, as a means for transferring the soil improving material, an appropriate conveyor means can be adopted, but it is preferable to prevent the soil improving material from scattering during the transfer. As a configuration of the soil improvement material transferring means for this purpose, it is preferable that a screw conveyor is built in the cylinder and the screw conveyor is driven to rotate by a hydraulic motor. Depending on the positional relationship between the continuous treatment tank and the soil improving material transporting means in the frame, the soil improving material transporting means may be constituted by a single path, but the first transporting means for sending out the soil improving material from the hopper and A second transferring means connected to the first transferring means for transferring the soil improving material upward, and a third transferring means for supplying the soil improving material from the second transferring means to the continuous treatment tank. If the transfer means is provided, the soil improving material can be more smoothly supplied into the continuous treatment tank. Further, when a large number of through holes for supplying the soil improving material are formed in a portion of the cylindrical body constituting the third transfer means facing the continuous treatment tank over substantially the entire length thereof, the supply of the soil improving material is wide, and Since it can be sprinkled uniformly, mixing with earth and sand is further promoted. Further, it is preferable that the supply position of the soil improving material by the third transfer means is a transition portion from the upper chamber to the lower chamber. Thereby, in the upper chamber, the earth and sand are sufficiently stirred, and the earth mass is sufficiently disintegrated and loosened, so that the mixing of the soil improvement material can be performed more smoothly. When mixing earth and sand with soil improvement material,
Uniform mixing can be performed.

In order to continuously discharge the improved soil generated in the continuous processing tank, means for discharging the improved soil generated in the continuous processing tank is provided at a rear position of the frame of the lower traveling body.
Then, in order to prevent the improved soil discharged by the discharging means from being stepped on by the crawler belt, it is necessary to discharge the improved soil out of the contact surface of the crawler belt. For this purpose, it is preferable to adopt a configuration in which the frame can protrude to the left or right side.

The soil improving material is supplied from the hopper into the continuous processing tank. An openable lid which can be opened and closed laterally is provided at the upper part of the hopper, and when it is closed, it is kept in a non-projecting state from the side of the hopper. When it is open, it is easy to replenish the hopper with soil improvement material by projecting from the side of the hopper, and the opening / closing lid is compactly stored during soil improvement work. Will be done.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 show the overall configuration of a soil improvement machine with an excavating mechanism according to the present invention. First, in FIGS. 1 and 2, 1 is a traveling means, 2 is a main frame, and 3 is an upper revolving structure, and these constitute a self-propelled traveling vehicle. Traveling means 1 in this vehicle
The sprocket 5 and the idler 6 are connected to and provided on the left and right track frames 4 and 4, and the crawler belt 7 is wound and provided between the sprocket 5 and the idler 6. Since the crawler belt 7 has an extremely large ground contact area, it can run smoothly even in a place where running conditions are poor due to irregularities and the like, and can perform stable work. The track frame 4 is fixedly provided on the main frame 2, and the upper revolving unit 3 is provided on the front portion F of the main frame 2 via the revolving device 8, as is clear from FIG. 6. It is installed so as to be capable of turning, and a soil improvement mechanism 9 is installed on the rear side B. Moreover, as is clear from FIG. 1, when the crawler belt 7 is viewed as a center, the main frame 2 is in a state of protruding greatly toward the rear side, and therefore, the position of the center of gravity as a whole is shifted toward the rear side.

A front working mechanism 10 is installed on the upper swing body 3, and an operator's cab 11 is provided alongside the front working mechanism 10 for an operator to board and operate the machine. Further, the front working mechanism 10 is turned around from the rear position of the cab 11 to
A machine room 12 is installed so as to protrude to the side opposite to 1, and the machine room 12 accommodates equipment for driving the machine, such as an engine and a hydraulic pump. The front working mechanism 10 includes a boom 13, an arm 14, and a bucket 15, and constitutes a mechanism for excavating earth and sand. The base end of the boom 13 is connected to the upper swing body 3 so as to be able to rotate vertically, and the base end of the arm 14 is connected to the tip of the boom 13 so as to be able to rotate vertically and the tip The bucket 15 is rotatably connected to the
The hydraulic excavator is a backhoe type excavator. The boom 13, arm 14 and bucket 15 are each driven by a hydraulic cylinder.

As is clear from FIGS. 3 and 4, the soil improvement mechanism 9 includes a sediment charging section 20, a continuous treatment tank 21,
Hopper 22, soil improving material transferring means 23, and discharging means 2
4, and As shown in FIG. 5, each device constituting the soil improvement mechanism 9 is turned on the rear side of the main frame 2 while excavated soil is stored in a bucket 15 constituting the front working mechanism 10. The upper revolving unit 3 is arranged so as not to interfere with each part. Here, the earth and sand charging section 20 is disposed above the continuous processing tank 21,
Are arranged side by side on the continuous processing tank 21,
Further, the discharging means 24 is arranged at the rearmost position.

First, when the earth and sand excavated by the bucket 15 constituting the front working mechanism 10 is inserted, the earth and sand input part 20 provided at the upper part of the continuous processing tank 21 is turned upward so that the earth and sand can be reliably received. It is composed of an expanded frame. The frame of the earth and sand input part 20 is a vertical wall 20a in a substantially vertical state at one side and a rear end,
On the other side, there is an inclined wall 20b inclined outward and on the front side an inclined wall 20c inclined forward. And
The earth and sand input section 20 may be provided with a sieving member or the like for separating earth and sand from rocks and other solid foreign substances, if necessary.

The continuous treatment tank 21 receives the earth and sand falling from the earth and sand input unit 20, and continuously mixes it with a soil improvement material described later and transports the soil in a predetermined direction, thereby continuously producing improved soil. It is for. For this purpose, a plurality of screw conveyors 25 for uniformly mixing the earth and sand and the soil improving material and transferring the improved soil toward the discharge side, for example, as shown in FIG. Are provided. Here, the screw conveyor 25 is provided with a screw 25b in which helical blades are continuously formed on a rotating shaft 25a, and among these screw conveyors 25, adjacent ones are rotated in opposite directions. Thereby, the earth and sand can be transferred in a predetermined direction while stirring.

Here, in order to reduce the size of the continuous processing tank 21 and lengthen the stirring process, as shown in FIG.
The continuous processing tank 21 is divided into upper and lower stages, and a predetermined number of screw conveyors 25 are provided in both the upper chamber 21a and the lower chamber 21b as conveyors with a stirring mechanism. The screw conveyors 25 in the upper chamber 21a are all driven by a single hydraulic motor 26U, and the screw conveyors 25 provided in the lower chamber 21b are all driven by a single hydraulic motor 26L. It has become.
The direction of conveyance by the screw conveyor 25 in the upper chamber 21a is as shown by the arrow in FIG.
The screw conveyor 25 is transported forward, that is, toward the upper revolving unit 3, and the transport direction of the screw conveyor 25 in the lower chamber 21b is directed backward. And the upper chamber 2
1a and the lower chamber 21b communicate with each other via a communication hole 27a formed at a position in front of a partition wall 27 which defines the space therebetween. Further, an outlet 28 for the improved soil is formed at a rear portion of the bottom surface of the continuous processing tank 21. As shown in FIG. 8, the screw conveyor 25 'has a plurality of blades 25b' intermittently arranged in a spiral shape on a rotating shaft 25a '.
Can also be used.

[0021] Regardless of using the screw conveyor 25,
Even if the screw conveyor 25 'is used, all the screw conveyors provided in the upper and lower chambers 21a and 21b are respectively connected to the hydraulic motors 26U and 26U.
In order to be driven by 26L, each rotating shaft extends into gear boxes 29U and 29L and is connected to a transmission gear (not shown), and the rotational force of hydraulic motors 26U and 26L is rotated by these rotation gears via these transmission gears. It is configured to sequentially transmit to the shaft. This simplifies the configuration of the driving means of the conveyor with the stirring mechanism.

The soil improving material is supplied into the continuous treatment tank 21 into which the earth and sand are charged, and the soil improving material can be automatically supplied. As a supply mechanism for this, a hopper 22 for storing soil improvement material,
2 and a soil improving material supplying means 23 for supplying the soil improving material to the continuous treatment tank 21. Hopper 22
Are arranged on the side of the continuous processing tank 21 in the main frame 2 in parallel with the continuous processing tank 21. 9 to 11, the hopper 22 is formed of a narrow container having substantially the same length as the continuous processing tank 21, and the interval between the left and right walls at the lower part thereof is continuously narrowed. I have. Here, the sediment charging section 2 on the continuous treatment tank 21
Since the inclined wall 20b that constitutes 0 is overhanging to the side, the upper part of the hopper 22 is inclined so as to avoid the inclined wall 20b, and an opening 22a is formed in the vertical wall part on the upper side. The opening / closing lid 3 is provided in the opening 22a.
0 is provided. The opening / closing lid 30 is connected to both ends of the main body 30a that covers the opening 22a,
A fastening portion 3 arranged along the front and rear end surfaces of the hopper 22
0b and 30b.

The main body 30a of the opening / closing lid 30 is always open 22
a, and the fastening portion 30b is pivotally attached to the front and rear end surfaces of the hopper 22 by pivot pins 32, and an arc-shaped groove 33 centered on the pivot pins 32 is formed.
A restricting pin 34 provided to protrude from the hopper is inserted into this groove.
3, the opening / closing stroke of the opening / closing lid 30 is regulated. When the lid 30 is closed, the soil improvement material hopper 2
2 and the soil improvement mechanism 9
Will not overhang to the side. Although a stopper is provided for holding the opening / closing lid 30 at the closed position and the open position, the mechanism of the stopper is not shown or described. When the open / close lid 30 is opened to supply the soil improving material to the hopper 22, FIG.
As shown in FIG. 2, since the opening / closing lid 30 protrudes greatly to the side and opens widely, the soil improving material can be easily supplied.

The soil improving material in the hopper 22 is supplied to the continuous treatment tank 2.
As the soil improving material transferring means 23 for transferring the material into the inside 1, a rotary shaft 36 is inserted into a cylindrical body 35, and a screw 37 spirally formed on the rotary shaft 36 is provided.
The hydraulic motor 38 is connected to the rotating shaft 36. Therefore, when the hydraulic motor 38 is operated and the rotating shaft 36 is driven to rotate, the screw 37 rotates and the soil improving material in the cylindrical body 35 is transferred.

Soil improving material transfer means 2 having the above configuration
3 are provided in three sets. First, the first transfer means 23a is provided in parallel along the lower end of the hopper 22, and is for sending out the soil improvement material from the hopper 22, and the first transfer means 23a is provided at the lower end of the hopper 22. The cylindrical body 35 is connected to the narrowest part of the portion, and a slit (not shown) is formed on the contact surface of the cylindrical body 35 with the hopper 22. Therefore, the soil improvement material is fed into the cylindrical body 35 from this slit, and is transported forward by the rotation of the screw 37.

An outlet of the first transfer means 23a is connected to a second transfer means 23b. The second transfer means 23b is for transferring the soil improvement material transferred in the horizontal direction by the first transfer means 23a toward the upper part of the continuous treatment tank 21. Here, the second transfer means 23b is for transporting the soil improving material upward, specifically, as shown in FIG. 10, so as to be transported diagonally upward. The rotary shaft 36 and the screw 37 in the cylindrical body 35 have a double structure.

Further, a third transfer means 23c is connected to an outlet of the second transfer means 23b. As shown in FIG. 11, the third transfer means 23c has a length at the upper portion of the continuous processing tank 21 that extends over substantially the entire length in the width direction (direction orthogonal to the traveling direction of the vehicle). A large number of through-holes 40 are formed in the cylindrical portion 35c at a position facing the continuous treatment tank 21 in the axial direction, and the soil improving material is introduced into the continuous treatment tank 21 from each of the through-holes 40. Will be supplied. Therefore, this third
Is a means for supplying the soil improving material to the continuous treatment tank 21. Here, the third transfer means 23c
6 is located at the upper position of the continuous processing tank 21, so as to prevent the earth and sand injected from the bucket 15 from directly hitting the third transfer means 23c, as shown in FIG. Front inclined wall 2 constituting part 20
0c is the cylinder 35c of the third transfer means 23c.
Overhangs to cover the top of

Next, the discharging means 24 is constituted by, for example, a well-known belt conveyor or the like.
Reference numeral 1 denotes a rear position of the main frame 2, which faces a lower position of the discharge port 28 behind the continuous processing tank 21, and is arranged so that its transport surface is horizontal. The end of the belt 41 protrudes at least from the side of the crawler belt 7, so that the improved soil treated in the continuous treatment tank 21 can be discharged to a position where it is not stepped on by the crawler belt 7 and accumulated. . Here, the place where the improved soil is deposited changes depending on whether the excavation site is located on either the left or right side of the vehicle. For this reason, the discharging means 24 can move to the left and right with respect to the main frame 2, and the belt 41 is always discharged regardless of whether the end of the belt 41 in the discharging means 24 is located at the left or right position. Exit 2
8 and its end is located outside the crawler belt 7 constituting the traveling means 1. Therefore, when the improved soil is discharged from the continuous processing tank 21 through the discharge port 28, the improved soil is received on the belt 41, and the belt 41 is driven to move outward from the ground contact surface of the crawler belt 7 in the vehicle. Is discharged.

In performing soil improvement on a predetermined ground by using the soil improvement machine with the excavation mechanism configured as described above, first, when the surface portion of the ground is a good soil, Excavate the soil on the surface layer. The surface soil is carried out from the site by a dump truck or the like and is deposited at a predetermined position. The soil improvement machine with the excavation mechanism is provided with a front working mechanism 10 having a bucket 15 as an excavation means. In addition, since the crawler belt 7 has a wide ground contact area as a traveling means, the excavation of the surface soil can be performed by the soil improvement machine with the excavation mechanism itself.
In soft lands such as wetlands, the soil must be improved, including the surface layer. The ground after excavation of the surface soil has uneven running conditions, and the running conditions are poor. Therefore, at the site where the ground improvement is performed, it is often extremely difficult or practically impossible to travel with the wheel-type traveling means. Since the traveling means 1 of the soil improvement machine with the excavation mechanism according to the present invention is configured by using the crawler belt 7, the traveling vehicle can travel smoothly even in a place where such traveling conditions are poor.

As described above, when performing the ground improvement work, the work can be performed while the traveling vehicle is running, so that the work can be performed while appropriately running the vehicle even in a place having a large area. can do. For example, a line-shaped excavation area having a predetermined width at a construction site is set, and earth and sand at the location are sequentially excavated. Then, the excavated soil is uniformly mixed with the soil improvement material using the soil improvement mechanism 9 to generate an improved soil, which is once in parallel with the excavation area,
In addition, the improved soil is deposited in a region on the opposite side of the running region of the soil improvement machine with the excavation mechanism. Then, after depositing the improved soil in the area, the improved soil is backfilled at the excavation site,
Next, leveling and compaction are performed using the blade 50 attached to the main frame 2.

By operating the front working mechanism 10, excavation of earth and sand is performed by the bucket 15. When excavating earth and sand, a large excavation resistance acts on the front working mechanism 10. In order to perform the excavation smoothly and stably, the position of the center of gravity of the entire main frame 2 should be at least a ground contact portion by the crawler belt 7. The arrangement of each part of the upper revolving superstructure 3 and the soil improvement mechanism 9 is set in advance. That is, when the front working mechanism 10 is operated, each part constituting the soil improvement mechanism 9 is made to function as a counterweight. Here, the soil improvement mechanism 9 is provided with a continuous treatment tank 21,
In FIG. 1, the weight changes before and after the earth and sand are charged, but even if the continuous processing tank 21 is substantially empty, the center of gravity is located at the center position of the ground contact portion of the crawler belt 7 or behind it. Is more preferable. As a result, the entire vehicle can be stably held even during excavation work.

The earth and sand excavated by the operation of the front working mechanism 10 can be directly introduced into the earth and sand introduction part 20, but there is a possibility that solid foreign matters made of rock, metal, glass and the like are contained. These solid foreign substances are transferred to the continuous processing tank 2
When the screw conveyor 25 enters the inside, the screw conveyor 25 does not operate smoothly. Therefore, it is preferable to remove these solid foreign substances in advance. For this purpose, the excavated earth and sand is temporarily placed, separated into earth and sand and solid foreign matters, and then put into the continuous treatment tank 21 or the earth and sand input unit 20 is fitted with a sieving means.

The temporarily placed earth or the excavated earth and sand is directly charged into the earth and sand input section 20, and the input of the earth and sand is performed using the bucket 15 of the front working mechanism 10. The front working mechanism 10 is operated to scoop up the earth and sand with the bucket 15, and in this state, the upper revolving unit 3 is swung to move the bucket 15 into the earth and sand input section 20.
When the earth and sand is discharged from the bucket 15, the earth and sand can be put into the earth and sand input section 20. Here, since the entrance portion of the earth and sand input section 20 has a large opening, the earth and sand input operation by the front working mechanism 10 can be easily performed, and the earth and sand does not scatter around. And the earth and sand put in the earth and sand input part 20 in this way moves to the continuous treatment tank 21.

When the introduction of earth and sand into the continuous processing tank 21 is started, the screw conveyor 25 is driven to rotate as a conveyor with a stirring mechanism provided inside the continuous processing tank 21. Further, in order to supply the soil improving material from the hopper 22 to the continuous treatment tank 21, the soil improving material transferring means 23 is also operated.

First, the earth and sand is taken into the upper chamber 21a. The earth and sand supplied by the rotation of the screw conveyor 25 provided in the upper chamber 21a are agitated to break or loosen the earth mass, thereby obtaining soil. The mixture is made to be easily mixed with the improving material, and is transported toward the front of the upper chamber 21a. When the earth and sand move forward in the continuous treatment tank 21, the earth and sand move from the communication hole 27a formed in the partition wall 27 to the lower chamber 21b. At this time, the soil supplied from the hopper 22 through the soil improving material transfer means 24 is transferred. The modifier is added to the earth and sand. Therefore, when it moves into the lower chamber 21b, it becomes a mixture of the earth and sand and the soil improvement material. A screw conveyor 25 is also provided in the lower chamber 21b, and the rotation of the screw conveyor 25 causes the earth and sand and the soil improving material to be stirred and uniformly mixed.

Here, the soil improvement material is directly supplied from the hopper 22 closed by the opening / closing lid 30 through the soil improvement material transfer means 23 having a substantially closed cylinder 35 as a transfer passage. Since the soil improving material can be supplied to the continuous treatment tank 21, there is no possibility that the soil improving material scatters around in the middle and contaminates the surrounding environment, and there is no possibility that the soil improving material is wasted. Further, the through holes 4 provided in the cylindrical body 35c of the third transfer means 23c in the soil improvement material transfer means 23.
From 0, the soil improvement material can be supplied uniformly over substantially the entire width of the continuous treatment tank 21. Here, the through hole 40
Is preferably as small as possible, but if it is too small, clogging may occur. Therefore, it is necessary to set the diameter of the through-hole 40 so that clogging does not occur and the soil improving material can be spread as uniformly as possible on the conveyed earth and sand in relation to the material of the soil improving material.

Thus, the continuous processing tank 21 is provided with six screw conveyors 25 provided in the upper and lower chambers 21a and 21b, respectively, and adjacent ones thereof rotate in opposite directions. Therefore, in the upper chamber 21a, after the soil mass is completely broken down and loosened to a homogeneous state, when the upper chamber 21a shifts to the lower chamber 21b, the soil quality is improved. The material is added to the lower chamber 21
Within b, the earth and sand and the soil improving material are uniformly mixed. As described above, by dividing the continuous treatment tank 21 into two upper and lower stages, a high-quality improved soil can be efficiently produced in a small and compact tank, and in which the soil improving material is mixed very uniformly with the earth and sand.

The produced improved soil is discharged from the discharge port 28. Since the discharge means 24 has a belt 41 disposed below the discharge port 28, the improved soil is rotated by rotating the belt 41. The soil is transported in a direction orthogonal to the traveling of the traveling vehicle and is deposited at a predetermined position. Here, since the accumulation position of the improved soil is a position outside the vehicle,
Since the soil improvement mechanism 9 including the discharging means 24 is provided on the main frame 2 of the lower traveling unit 1 without turning on the improved soil on which the crawler belt 7 has accumulated, the upper revolving unit 2 is turned. Also, since the discharge position of the improved soil does not change, it can be reliably deposited in a predetermined deposition area.

While the traveling vehicle is running, the excavation is excavated to a predetermined depth by the front working mechanism 3, and the soil is continuously improved so that the improved soil can be deposited in parallel with the excavation area. Then, when the work consisting of one line-shaped excavation and accumulation of improved soil is completed, while returning the traveling vehicle,
Backfill the improved soil at the excavation site. When the ground improvement by excavation and backfilling of one linear excavation area having a predetermined width is completed, the excavation area adjacent to this excavation area is similarly excavated to a line and backfilling of the improved soil is performed. . Thus, the excavation is continuously excavated in the bucket 18 while the traveling vehicle is running, and the agitation of the soil and the mixing of the soil improvement material by the continuous treatment tank 21 can be continuously performed. Since the reclaimed soil that can be generated and backfilled is located on the side of the traveling vehicle, the backfill work can be performed smoothly and quickly.

[0040]

As described above, the present invention provides an upper revolving structure provided with a soil excavation mechanism and a soil improvement mechanism for improving the soil quality by mixing the excavated soil with a soil improvement material. It is arranged so as to be located on the frame of the traveling vehicle having traveling means having front and rear, and is arranged at a position that does not interfere with each other when turning the upper revolving structure,
With a small and compact machine, excavation of soil and soil improvement of this excavated soil can be performed by a single machine,
In addition, the work from the input of the soil to the discharge of the improved soil obtained by the soil improvement can be performed continuously, and the soil improvement material scatters around when mixing the soil and soil improvement material. In addition, there is no inconvenience such as adversely affecting the surrounding environment, and the improved soil can be continuously excavated to a desired depth by the excavation means, so that the ground can be accurately and efficiently improved. To play.

[Brief description of the drawings]

FIG. 1 is a front view of a soil improvement machine with a digging mechanism with digging means showing one embodiment of the present invention.

FIG. 2 is a rear view of FIG. 1 omitting a front working mechanism.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a plan view of FIG. 1;

FIG. 5 is a front view of the soil improvement machine with the excavation mechanism with the excavation means shown in a state where the upper revolving unit is swung.

FIG. 6 is a plan view showing a frame of the traveling vehicle.

FIG. 7 is a sectional view of a continuous processing tank.

8 is a cross-sectional view of a continuous processing tank equipped with a conveyor with a stirring mechanism different from FIG.

FIG. 9 is an operation explanatory view showing an opening / closing mechanism of the hopper.

FIG. 10 is a configuration explanatory view showing first and second transfer means of the soil improvement material transferring means.

FIG. 11 is an explanatory diagram showing a configuration of a third transporting means of the soil improving material transporting means.

FIG. 12 is an external perspective view of a hopper made of a soil improvement material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Running means 2 Main frame 3 Upper revolving body 9 Soil quality improvement mechanism 10 Front working mechanism 11 Operator cab 12 Machine room 13 Boom 14 Arm 15 Bucket 20 Sediment loading part 21 Continuous processing tank 21a Upper chamber 21b Lower chamber 22 Hopper 23 Soil Improved material transfer means 23a First transfer means 23b Second
Transfer means 23c third transfer means 24 discharge means 25 screw conveyor 27 partition wall 27a communication hole 28 discharge port 30 opening / closing lid 35 cylindrical body 36 rotation shaft 37 screw 38 hydraulic motor 40 through hole 41 belt

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takami Kusuki 650 Kandamachi, Tsuchiura-shi, Ibaraki Pref.

Claims (9)

[Claims] 1. A frame of a traveling vehicle having a lower traveling body provided with traveling means having a pair of right and left crawler belts, wherein an upper revolving body is pivotally provided via a revolving device at a position on the front side in the traveling direction. Installing at least earth and sand excavation means and its driving means and an operator's cab on the upper rotating body,
Further, on the rear side, a continuous treatment tank having one or more conveyors with a stirring mechanism installed therein at a position not interfering with the turning radius of the upper rotating body, a hopper for storing soil improvement material, and A soil improvement machine with an excavation mechanism, comprising a soil improvement mechanism having soil improvement material transfer means for transferring the soil improvement material toward the continuous treatment tank. 2. The center of gravity of the frame of the lower traveling body is located within a range of a ground contact portion of the crawler belt and at a central portion or a position behind the central portion. The soil improvement machine with the excavation mechanism according to the above. 3. The continuous processing tank is divided into two upper and lower chambers, a wide-mouthed earth and sand charging section is installed on the upper chamber, and conveyors with a stirring mechanism are provided in both chambers. 2. The soil improvement machine with an excavation mechanism according to claim 1, wherein the upper chamber and the lower chamber communicate with each other on the front side in the transport direction by a conveyor with a stirring mechanism provided in the upper chamber. 4. The soil improvement with an excavation mechanism according to claim 1, wherein said soil improvement material transferring means has a structure in which a screw conveyor is built in a cylinder and the screw conveyor is driven to rotate by a hydraulic motor. machine. 5. The soil improving material transferring means includes: a first transferring means for sending out the soil improving material from the hopper;
Second transfer means connected to the transfer means for transferring the soil improvement material upward, and third transfer means for supplying the soil improvement material from the second transfer means to the continuous processing tank. The soil improvement machine with an excavation mechanism according to claim 4, characterized by comprising: 6. A structure in which a large number of through holes for supplying soil improvement material are formed over substantially the entire length of a portion of the cylindrical body constituting the third transfer means facing the continuous processing tank. The soil improvement machine with an excavation mechanism according to claim 5, wherein 7. The soil improvement machine with an excavation mechanism according to claim 7, wherein the supply position of the soil improvement material by the third transfer means is a transition portion from the upper chamber to the lower chamber. . 8. A discharging means for discharging the improved soil generated in the continuous treatment tank is provided at a rear position of the frame of the lower traveling body, and the discharging means is located at a position which does not interfere with the traveling part of the crawler belt. 2. The soil improvement machine with an excavation mechanism according to claim 1, wherein the frame is configured to be able to protrude to the left or right side of the frame in order to discharge the improved soil. 9. An opening / closing lid which can be opened and closed laterally is provided at an upper portion of the hopper, and the opening / closing lid is held so as not to protrude from a side surface of the hopper when closed, and is opened when opened. The soil improvement machine with an excavation mechanism according to claim 1, wherein the soil improvement machine is configured to project from the ground.