JPH11310915A - Soil improvement machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an improved soil solidifiable to a required extent when earth and sand are mixed with a soil improvement material to stir even in the case the earth and sand excavated by an excavation mechanism and thrown into a continuous treatment tank have a very little water content. SOLUTION: In order to make a state to mix earth and sand excavated by a bucket and thrown into a continuous treatment tank 21 with a soil improvement material, a sprinkler device 60 connecting a nozzle 62 to the front end of a pipe 61 is provided to an upper position of the continuous treatment tank 21, and a water supply tank is placed to a counter-weight. A through-hole 73 is bored in a fixed side member 70b of a center joint 70 for constituting a swing device, the pipe 61 is inserted into the through-hole 73, and it is connected to a supply pipe 64 from the water supply tank through a swivel joint 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for excavating earth and sand at a predetermined location at a civil engineering site or a construction site, improving the soil quality of the excavated soil, and burying the excavated soil to carry out construction such as ground reinforcement. The present invention relates to a soil improvement machine to be used.

[0002]

2. Description of the Related Art Conventionally, there has been known a method of improving a soft ground to a solid ground by mixing a soil improving material such as cement with the soil constituting the ground and performing a solidification treatment. Have been. 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, it is necessary to deposit excavated earth and sand by a hydraulic excavator at a predetermined location and to take in the accumulated sediment. Is common. Here, as this type of mixing device, for example, a device disclosed in Japanese Patent Publication No. 1-49538 is known. This mixing device
A self-propelled mixing device having a mixing tank and a soil quality improving material supply unit having a bucket for supplying sediment and sediment, and configured as a self-propelled mixing device having wheel type traveling means; Is designed to be rotatable horizontally in a limited angle of the vehicle body. Furthermore, 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 stirring means, and discharged to a predetermined position. Processing is performed in a batch system.

[0006] On the other hand, in a system 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, agitation of soil and soil improvement material
Mixing can also be performed using a digging mechanism equipped with a bucket in a hydraulic shovel, but it is difficult to uniformly stir and mix the soil and soil improvement material over a large area, and requires a high level of skill. I do. Therefore, a method of uniformly stirring and mixing the soil improvement material sprayed by using the excavation mixing and 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 using a self-propelled mixing device, the soil quality improvement processing of the earth and sand by the mixing tank is performed in a batch type, so that the processing capacity is reduced. Complaints remain. In addition, in the method using the excavation mixing and stirring means, there is no need for excavation and accumulation of earth and sand, and since the processing is continuous, the processing capacity is high, but since the soil improvement material such as cement is sprayed, this soil improvement material is There is a problem that it is not suitable for work in a densely populated house or the like, for example, when the rotor is scattered, which adversely affects the surrounding environment, and generates noise when the rotor is driven. In addition, the excavation depth depends on the length of the cutter, and the length of the cutter is limited. Since the length of the cutter currently used is about 1 m at the longest, even a portion deeper than that is used. There is also a problem that it is not suitable for ground improvement.

In consideration of the above points, in order to accurately and efficiently improve the ground to a desired depth without adversely affecting the surrounding environment, the present applicant has proposed a pair of right and left crawler tracks. The excavation mechanism for the earth and sand provided with the bucket and the earth and sand excavated by the excavation mechanism are put into a traveling vehicle in which the upper revolving body is pivotably mounted on the lower traveling body having the same, and uniformly mixed and stirred with the soil improvement material. Thus, a soil improvement machine with an excavation mechanism having a configuration including a soil improvement mechanism having a treatment unit for continuously producing improved soil was developed, and a patent application was filed as Japanese Patent Application No. 9-146073. Was.

In the soil improvement machine of the prior application, a continuous treatment tank is provided as a treatment unit, and a screw conveyor is provided in the continuous treatment tank as a means for mixing and agitating the earth and sand and the soil improvement material. And the continuous processing tank is installed on the lower traveling body side. The earth and sand excavation mechanism is provided on the upper revolving structure side, which allows the earth and sand to be excavated by the excavation mechanism and directly injected into the continuous processing tank, while stirring the soil with the screw conveyor in the continuous processing tank. Be transported. During this transfer, the soil improving material is added, and the earth and sand and the soil improving material are further transferred while being uniformly stirred and mixed, and discharged by the discharging means connected to the rear end of the continuous processing tank. Become.

[0010]

By using the soil improvement machine of the prior application, soil can be excavated to continuously produce an improved soil uniformly mixed with the soil improvement material, and the soil improvement machine can be self-propelled. It is a formula, and it is equipped with running means using crawler tracks, so it is possible to work while traveling freely even at work sites with poor running conditions, so that soil improvement work can be done smoothly and easily. Although there is, there is still no problem.

Cement and the like are used as the soil improving material, and the improved soil obtained by mixing this with excavated earth and sand must be solidified to some extent by the action of the soil improving material. For this purpose, it is necessary not only to simply mix the soil and the soil improving material uniformly, but also to knead the soil and the soil improving material by the action of a certain amount of moisture. If the excavated soil itself contains an appropriate amount of water, the soil and soil improving material are uniformly kneaded and solidified sufficiently by simply adding the soil improving material to the excavated soil and stirring and mixing. However, for example, when the sunshine continues in summer or the like, and the soil is deprived of water and the water content is extremely reduced, even if uniformly stirred and mixed with the soil improvement material, the mixture does not solidify, or It does not solidify sufficiently. Therefore, if backfilling is performed without being sufficiently solidified, not only the ground improvement cannot be substantially performed, but also the soil improvement material may be scattered by wind or the like.

The present invention has been made in view of the above points, and an object of the present invention is to provide an excavated soil and a soil improvement material even when the excavated soil has an extremely low moisture content. Is uniformly kneaded to produce a sufficiently solidified and high quality improved soil.

[0013]

In order to achieve the above-mentioned object, the present invention relates to a traveling vehicle having a lower traveling body having a pair of left and right crawler belts, the upper revolving body being installed to be able to turn via a turning device. Soil improving material supply means and excavated soil are charged, and have a predetermined length in the horizontal direction for mixing and stirring with the soil improving material supplied from the soil improving material supplying means, and one or It is characterized by comprising a continuous processing tank equipped with a plurality of conveyors with a stirring mechanism, and a watering means for watering the continuous processing tank.

Here, the watering means has at least a watering nozzle, but it is preferable to install a water supply tank for supplying water to the watering nozzle. Since the continuous treatment tank needs a certain length, it is reasonable to install it on the lower traveling body side. When the continuous processing tank is installed on the lower traveling body side,
In some cases, a space for installing a water supply tank cannot be secured on the lower traveling body side. In this case, the water supply tank is arranged on the upper revolving body side, and the water supply tank and the watering nozzle are connected by a water supply pipe.

The water pipe includes a swivel joint, since the upper revolving structure turns. Since a center joint provided in the turning device is provided at the turning center of the upper revolving structure between the lower traveling structure and the upper revolving structure, a through-path is provided at the turning center position of the center joint, and The pipe on the water supply tank side and the pipe on the watering nozzle side can be connected via a swivel joint.
Also, as a center joint, a fixed side member fixedly provided on the lower traveling body side includes the turning center position,
A pipe from a watering nozzle is connected to the fixed side member, and a pipe from a water supply tank in the upper rotating body is connected to the fixed side member via a swivel joint.

The water supply tank is not always necessary, and is required only when the soil at the site to be treated is abnormally dry. Therefore, the water supply tank should be detachably provided on the upper rotating body. preferable. In addition, the installation position of the water supply tank may be any position as long as the installation space is secured, but it is optimally configured to be detachably mounted on a particularly strong counterweight. .

[0017]

Embodiments of the present invention will be described below with reference to the drawings. Here, the excavation mechanism provided in the soil improvement machine of the present invention has the same configuration as the excavation mechanism in the hydraulic excavator. Therefore, the basic configuration of the soil improvement machine is the same as that of a conventionally known hydraulic excavator. The soil improvement mechanism is mounted without impairing the function of the hydraulic excavator and without particularly changing the configuration as the hydraulic excavator. However, the soil improvement machine according to the present invention does not necessarily need to include a mechanism as a hydraulic shovel, that is, a digging mechanism.

FIGS. 1 to 4 show the overall construction of the soil improvement machine of the present invention. As is apparent from these drawings, a traveling vehicle is constituted by the lower traveling body 1 and the upper revolving superstructure 2, and the traveling vehicle is provided with a front working mechanism 3 as an excavation mechanism. Further, a processing unit 4 is provided on the lower traveling unit 1 side, and the upper revolving unit 2 is provided.
On the side, soil improvement material supply means 5 is installed. Further, an operator's cab 6 and a machine room 7 are installed in the upper revolving superstructure 2, and the machine room 7 accommodates equipment for driving the machine such as an engine and a hydraulic pump. After boarding, the entire machine is operated. The upper revolving unit 2 can be turned by the turning device 8 with respect to the lower traveling unit 1.

The lower traveling body 1 has crawler-type traveling bodies 10 provided on the left and right sides. The both traveling bodies 10 include sprockets 12 and idlers 13 provided at both ends of a track frame 11, and these sprockets 12 and idlers 13 And a crawler belt 14 wound there between. And
The sprocket 12 is driven by a hydraulic motor (not shown). Also, the left and right track frames 11
Are connected by a center frame 15, and the turning device 8 is attached to the center frame 15. Here, the center frame 15 is bent downward at both ends of a horizontal portion where the turning device 8 is installed, and the track frame 11 is connected to both ends. Therefore, a large space is formed below the center frame 15.

The front working mechanism 3 constitutes excavating means, and is connected to a boom 16 provided on the frame 2a of the upper swing body 2 so as to be capable of raising and lowering, and to the tip of the boom 16 so as to be rotatable in the vertical direction. Arm 17 and this arm 1
And a bucket 18 rotatably provided at the tip of the reference numeral 7. Then, the boom 16, the arm 17, and the bucket 1
8 is driven by hydraulic cylinders 16a, 17a and 18a, respectively, to perform operations such as excavation of earth and sand.

The processing unit 4 has the configuration shown in FIGS. First, as is clear from FIGS. 5 and 6, the processing unit 4 includes a sediment charging unit 20, a continuous processing tank 21, and a discharging unit 22. The continuous processing tank 21 is made of a shallow container whose length in the length direction is longer than that in the width direction, and the upper surface and the rear end are open.
The continuous processing tank 21 is disposed in a substantially horizontal state at a position below the center frame 15 in the lower traveling body 1, and four screw conveyors 23 are provided in parallel as a conveyor with a stirring mechanism inside the continuous processing tank 21. ing. These screw conveyors 23 are configured by providing paddles 23b on which the blades are intermittently provided at a predetermined angle with respect to the axis of the rotary shaft 23a. These four screw conveyors 23 have a length substantially covering the entire length of the continuous processing tank 21, and paddles 23 b, 23 b of adjacent screw conveyors 23, 23.
Are inclined in the opposite direction, and each paddle 23
b extends to a position close to the rotation shaft 23a of the screw conveyor 23 adjacent thereto.

Each screw conveyor 23 has a continuous processing tank 2
1 and is driven by a hydraulic motor 25 mounted on a drive unit 24 having a built-in transmission means such as gears. As shown in FIG. 7, the rear end of the continuous processing tank 21 is covered with a cover member 26 over a predetermined length range.
The support hanger 27 is provided with a bearing 28 that rotatably supports the rear end of the rotating shaft 32a.

The continuous processing tank 21 having the above configuration is fixedly held on the center frame 15 of the lower traveling unit 1. For this purpose, support members 29 are extended on both left and right sides of the continuous processing tank 21, and receiving portions 30 are fixedly provided on the center frame 15, as shown in FIG. By mounting the member 29 on the receiving portion 30, the continuous processing tank 21 is supported by the center frame 15. Then, the continuous processing tank 21 can be fixed by mounting a bolt between the support member 29 and the receiving portion 30 or the like. However, the continuous processing tank 21 is the center frame 1
5 is desirably detachable. For this purpose, a mechanism for stably holding the continuous processing tank 21 supported by the center frame 15, such as a stopper provided in the receiving portion 30, may be provided.

Further, a discharge means 22 is connected to the rear end of the continuous processing tank 21. This discharging means 22 is provided in FIG.
As is clear from FIG. 10 and FIG. 10, a screw 32 for transferring the improved soil is provided in the cylindrical main body 31. The screw 32 is a hydraulic motor 33.
Is driven to rotate. The main body 31 extends in a direction orthogonal to the traveling direction of the vehicle, and has an inflow opening 31a formed in a peripheral body thereof. And the continuous processing tank 21
Are connected so that the rear end portion covered by the cover member 26 faces the inflow opening 31a. The screw 32 is a rotary shaft 32 driven to rotate by a hydraulic motor 33.
The improved soil guided from the continuous treatment tank 21 into the main body 31 of the discharge means 22 is fixed in a direction orthogonal to the running direction of the vehicle by the rotation of the screw 32. To be discharged from the discharge port 31b and deposited at a desired location. The position of the opening of the discharge port 31b is determined by the crawler belt 14 constituting the undercarriage 1.
The position is further outside, so that even when the vehicle is running, the improved soil accumulated on the crawler belt 14 is not stepped on.

The main body 31 constituting the discharging means 22 is fixedly held on the center frame 15 of the lower traveling body 1 by supports 34 provided at two places in the axial direction. The support 34 is a member made of a substantially rectangular member. The support 34 is provided so as to be connected to a support rod 35 (see FIG. 3) fixed to the center frame 15. Thereby, the discharging means 22 is fixedly supported by the center frame 15 independently of the continuous processing tank 21. A cylindrical connecting portion 36 is continuously provided in a protruding state at a portion of the inflow opening 31 a in the peripheral body portion of the main body portion 31, and an end of the continuous processing tank 21 is fitted into the cylindrical connecting portion 36. It is assembled in such a manner. Therefore, when cleaning the inside of the continuous processing tank 21 and the discharging means 22, the center frame 1 is independent of each other.
5 can be taken out.

Next, the soil improvement material supply means 5 is configured as shown in FIGS. That is, it is composed of a supply unit 40 installed on the frame of the upper revolving unit 2 and a soil improving material hopper 41 provided on the lower traveling unit 1 side. As shown in FIG. 11, a flexible container 42 made of a bag filled with a soil improving material is placed on the supply source unit 40. 41
After that, the soil improving material is supplied to the continuous treatment tank 21.

First, the supply source unit 40 includes a container holding frame 43 erected on the frame of the upper swing body 2,
The flexible container 42 is disposed below the frame 43 and functions as a temporary storage unit. The flexible container 42 is installed in the frame 43 so that the lower end of the flexible container 42 enters the supply unit 44. Flexible container 4
2 is installed in the supply source unit 40, since the soil improvement material is housed in a sealed state inside, the opening must be provided to supply the soil improvement material when installed in the supply source unit 40. Must. For this purpose, FIG.
As shown in (2), a cutter 45 is mounted on the supply unit 44. Therefore, the frame 4 constituting the supply source unit 40
When the flexible container 42 is attached to the supply unit 4, the lower end of the flexible container 42 has its own weight.
4, the cutter 45 pierces the lower end of the flexible container 42, so that the flexible container 42 is opened and the soil improving material flows into the supply unit 44.

The supply section 44 has a substantially inverted quadrangular pyramid shape, and its tip projects forward in the traveling direction of the upper swing body 2 and further toward the center of the upper swing body 2. The supply port 4 at the lower end of the supply section 44
A shutter 46 is provided at a portion 4a, and the shutter 46 is driven to open and close by a hydraulic cylinder 46a. As is clear from FIG. 13, the soil improving material hopper 41 is provided so as to be connected to the continuous processing tank 21 installed on the lower traveling body 1 side, and is disposed at a position where the supply port 44a of the supply unit 44 is opened. . For this reason, the continuous processing tank 21
A plurality of pillars 47 are erected on the side wall of the vehicle, and the soil improving material hopper 41 is detachably attached to these pillars 47 and fixed by bolts or the like. The upper end of the soil improving material hopper 41 is open, and the upper end opening faces the lower end of the supply unit 44 provided with the shutter 46. The soil improving material hopper 41 has a length substantially covering the entire length in the width direction of the continuous treatment tank 21, and the front and rear wall surfaces are inclined in a direction approaching each other as going downward. Here, the area of the opening of the supply unit 44 is extremely small as compared with the dimension of the soil improvement material hopper 41 in the width direction, and the supply position of the soil improvement material to the soil improvement material hopper 41 is concentrated. However, there is a possibility that the storage amount varies. Therefore, in order to make the soil improving material uniformly wrap around the entire width of the soil improving material hopper 41, the soil improving material in-hopper feeding means 48 (consisting of a screw conveyor or the like) in the width direction of the soil improving material hopper 41. 6 (see FIG. 6).

Further, a feeder 49 for supplying the soil improving material to the continuous treatment tank 21 is provided at the lower end of the soil improving material hopper 41. This feeder 49 constitutes a fixed amount supply member, and is shown in FIGS.
As shown in (1), a partition wall 51 is formed at a predetermined angle (every 90 ° in the illustrated example) on a rotating shaft 50 provided to penetrate the lower end of the soil improvement material hopper 41 in the horizontal direction. Thereby, a V-shaped fixed-quantity supply container portion 52 is formed between adjacent partition walls, and the fixed-quantity supply container portion 51 is formed by a pair of cut-off walls 53, 53 formed in an arc shape.
It is located between them. The radius of the arc forming the cut-off wall 53 is determined by the distance between the rotation center of the rotation shaft 50 and the fixed-quantity supply container portion 52.
, And the slit-shaped openings are formed vertically between the two cut-off walls 53, 53. The opening on the upper side is an inflow opening 54 through which the soil improving material is supplied from the soil improving material hopper 41 to the quantitative supply container 51, and the opening on the lower side is the soil improving material from the quantitative supply container 52 to the continuous treatment tank 21. Outflow opening 55 for supplying the liquid.

The rotary shaft 50 is driven to rotate by a hydraulic motor 56. Each time the rotary shaft 50 makes a quarter turn, a soil improving material corresponding to the volume of the fixed-quantity supply container 52 is stored in the continuous processing tank 21. Supplied. In addition, the feeder 49 has a length substantially covering the entire length of the continuous processing tank 21 in the width direction, and the soil improving material is uniformly supplied from the outflow opening 55 to the continuous processing tank 21 over the substantially entire length in the width direction. . Thereby, since the soil improving material is supplied in a dispersed state in the continuous processing tank 21, the stirring efficiency is improved.

In performing soil improvement on a predetermined ground using the soil improvement machine configured as described above, first, when the surface portion of the ground is good quality soil, the soil on the surface portion is removed. Excavate. This surface soil is carried out from the site by a dump truck or the like, and is deposited at a predetermined position.
This soil improvement machine is provided with a front working mechanism 3 having a bucket 18 as an excavating means and equipped with a crawler belt 14 having a large ground contact area as a traveling means. You can do it yourself. 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 soil improvement machine according to the present invention employs the traveling body 10 using the crawler belt 14, the traveling vehicle can travel smoothly even in such a place where traveling conditions are poor.

When the front working mechanism 3 is operated to excavate earth and sand, and the excavated earth and sand is injected into the earth and sand input section 20, the earth and sand injected into the earth and sand input section 20 is smoothly fed into the continuous processing tank 21. . If, for example, a cage is provided in the earth and sand input unit 20, rocks, metals, and the like are separated, and only earth and sand are taken in. Since the four screw conveyors 23 are provided in the continuous processing tank 21, the earth and sand introduced by the rotation of the screw conveyor 23 is finely crushed and stirred, and becomes a state of sand grains toward the rear side. Transported.

The earth and sand supplied into the continuous processing tank 21 is continuously supplied in a constant amount from the soil improving material supply means 5 into the continuous processing tank 21 during the transportation, and the soil and the sand being transported are transferred to the continuous processing tank 21. Is added. Therefore, screw conveyor 2
By the rotation of 3, the earth and sand and the soil improvement material are stirred and uniformly mixed. And since it can supply directly to the continuous processing tank 21 from the flexible container 42 through the supply part 44 and the feeder 49 of the soil improvement material hopper 41, there is no possibility that the soil improvement material will scatter around. In this way, the soil is uniformly mixed with the soil improving material to produce the improved soil. The improved soil is extruded from the rear end of the continuous treatment tank 21 toward the discharging means 22 and discharged by the screw 32. Is deposited at a predetermined position.

By the way, the excavated earth and sand is mixed with the soil improvement material, and the earth and the soil improvement material are kneaded by this mixing, and the resulting improved soil must be in a solidified state to some extent. For this purpose, a certain amount of water is required. When the water content of the earth and sand is extremely small, water is supplied into the continuous treatment tank 21 from outside. This water supply is performed by showering over the entire width of the continuous processing tank 21. For this purpose, a watering means 60 is provided at an upper position of the continuous processing tank 21. The watering means 60 is formed by connecting a watering nozzle 62 extending in the width direction of the continuous processing tank 21 to the tip of a pipe 61 installed in a vertical state. The sprinkling nozzle 62 has a spout formed of a large number of small holes in the axial direction. The spouting nozzle 62 is mounted at a position immediately after the soil improving material is supplied by the soil improving material hopper 41 in the continuous treatment tank 21 or in a vicinity thereof.

A water supply tank 63 is provided for supplying water to the watering nozzle 62. The capacity of the water supply tank 63 is made as large as possible in order to increase the amount of stored water. Since the water supply tank 63 having a large capacity cannot be installed in the lower traveling structure 1, it is provided on the upper rotating body 2 side. In addition, since the water sprinkling means 60 is used when the water content of the earth and sand is extremely small, the water supply tank 63 does not need to be always provided in the upper swing body 2. Therefore, the counterweight 9 provided on the upper swing body 2 is detachably mounted. For this purpose, a water supply tank 63 is detachably mounted on the counterweight 9, and the supply pipe 64 is connected to the water supply tank 63.
Connect. The counterweight 9 is provided with a mounting portion 65 for installing the water supply tank 63.

The supply pipe 64 connected to the water supply tank 63 is drawn out from the connection with the water supply tank 63 to the center joint 70 as shown in FIG. Here, the center joint 70 has a fixed side member 70b on the lower traveling body 1 side and a rotating side member 70b on the upper revolving body 2 side.
a is provided. In this case,
The fixed side member 70b and the rotating side member 70a are viewed from the side of the lower traveling body 1 which is directly in contact with the ground, and the fixed side member 70b is fixed to the lower traveling body 1 70a rotates in the horizontal direction with respect to the undercarriage 1,
That is, it is a member that turns. This center joint 70
Is for forming an oil passage for flowing hydraulic oil to a traveling hydraulic motor or the like in the turning device 8.
The center joint 70 is arranged at the center of rotation of the upper swing body 2. The rotation-side member 70a is disposed at a position including the center of rotation, the fixed-side member 70b is an annular member fitted to the rotation-side member 70a, and the fixed-side member 70b is connected to the rotation-side member 70a. It extends upward through it.

A support arm 71 is provided on the rotation side member 70a, and a swivel joint 72 is connected to the support arm 71. The pipe 61 connected to the watering nozzle 62 is connected to the swivel joint 7.
The pipe 61 is inserted into a through hole 73 formed in the fixed member 70b of the center joint 70 by drilling. And the supply pipe 64
Is connected to the swivel joint 72,
Thereby, the supply pipe 64 and the pipe 61 are connected so as to be relatively rotatable. The through-hole 73 formed in the fixed-side member 70b of the center joint 70 includes
In addition to the pipe 61 being inserted, it is also used as a path for transmitting a signal from a sensor or the like provided on the lower traveling body 1 side.

With the above construction, even if the excavated soil on the ground to be improved is abnormally dried and the water content is extremely small, the soil is removed by the screw conveyor 23 in the continuous treatment tank 21. When the soil improving material is supplied and slightly transferred after the soil improving material is transported while being mixed and stirred, the watering nozzle 6
From 2 water is added. Therefore, the input soil and the soil improving material are kneaded by adding moisture by the action of the screw conveyor 23 thereafter, and the soil and the soil improving material are uniformly mixed, and the desired soil based on the mixing ratio thereof is determined. An improved soil in a state of being solidified to the extent of the above is obtained. Therefore, by backfilling the improved soil, the ground can be strengthened. Here, the amount of water to be added changes according to the water content of the input soil. For this purpose, it is preferable to provide a flow control valve in the middle of the path from the water supply tank 63 to the watering nozzle 62 so that the amount of water supplied from the watering nozzle 62 can be adjusted.

[0039]

As described above, the present invention is configured so that water can be sprinkled into the continuous treatment tank equipped with a conveyor equipped with a stirring mechanism. Is very small,
By adding water after it is put into the continuous treatment tank, by mixing and mixing the earth and sand with the soil improvement material, it is kneaded to a desired degree and solidified to a necessary degree. Can be generated.

[Brief description of the drawings]

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

FIG. 2 is a plan view of FIG.

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

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

FIG. 5 is a diagram illustrating the configuration of a continuous processing tank.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a sectional view of a rear end portion of the continuous processing tank.

FIG. 8 is a cross-sectional view taken along the line XX of FIG. 6, showing a state in which the continuous processing tank is mounted on the lower traveling body.

FIG. 9 is a front view showing a configuration of a discharging unit.

FIG. 10 is an external view showing a connecting portion between a continuous processing tank and a discharging unit.

FIG. 11 is an overall configuration diagram of a soil improvement material supply unit.

FIG. 12 is a cross-sectional view of a main part of a supply section of a soil improvement material.

FIG. 13 is a configuration explanatory view showing a relative relationship between a soil improvement material supply unit and a soil improvement material hopper.

FIG. 14 is an explanatory diagram of a configuration of a fixed quantity supply mechanism of a soil improvement material.

FIG. 15 is a diagram illustrating the operation of a fixed quantity supply mechanism for soil improvement material.

FIG. 16 is a sectional view of a center joint.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 3 Front working mechanism 4 Processing unit 5 Soil improving material supply means 8 Revolving device 9 Counterweight 20 Earth and sand input part 21 Continuous treatment tank 22 Discharge means 23 Screw conveyor 40 Supply source unit 41 Soil improving material hopper 42 Flexible container 49 Feeder 60 Watering means 61 Pipe 62 Watering nozzle 63 Water supply tank 64 Supply pipe 65 Mounting part 70 Center joint 70a Rotating side member 70b Fixed side member 71 Support arm 72 Swivel joint 73 Through hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Sekino 650, Kandamachi, Tsuchiura-shi, Ibaraki Pref.

Claims (5)

[Claims] A soil improvement material supply means and excavated soil are supplied to a traveling vehicle having an upper revolving body pivotally mounted on a lower traveling body having a pair of right and left crawler tracks via a revolving device, and the soil improvement is performed. A continuous processing tank having a predetermined length in the horizontal direction and having one or more conveyors equipped with a stirring mechanism therein for mixing and stirring with the soil improvement material supplied from the material supply means; A soil quality improving machine comprising: a water sprinkling means for sprinkling water in a tank. 2. The continuous treatment tank is installed on a lower traveling body side, and the water sprinkling means includes a water supply tank installed on the upper revolving unit, and a water sprinkling nozzle that sprinkles water into the continuous processing tank. The soil improvement machine according to claim 1, characterized in that: is fixed to the lower traveling body side, and is connected between the water supply tank and the watering nozzle by a water pipe including a swivel joint. 3. The swivel device according to claim 2, wherein a center joint is provided, a through-path is provided at a center position of the center joint, and the water pipe is inserted through the through-path. The soil improvement machine as described. 4. The center joint according to claim 1, wherein a fixed member fixed to the lower traveling body side includes a turning center position, and the water supply pipe includes a pipe from the water spray nozzle and a pipe from the water supply tank. The soil improvement machine according to claim 3, wherein said two pipes are connected via a swivel joint provided on said fixed member. 5. A structure in which a counterweight is provided on the upper swing body, and the water supply tank is detachably mounted on the counterweight.
The soil improvement machine as described.