JP2002088800A - Solidification material control device for self-propelled soil improving machine, and self-propelled soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solidification material control device for a self-propelled soil improving machine and the above machine, capable of sufficiently responding to the various needs for strength expression so as to cope with the increasing range of uses in recent years. SOLUTION: A controller, mounted on the self-propelled soil improving machine, allows a solidification material supply to be controlled according to the water content α of charged sediment by performing an arithmetical operation for a rotational speed command δ (×0) for controlling the rotational speed of a feeder 32 so as to control the rotational speed of the feeder 32 according to the dry weight γ of conveyed sediment, which is determined by the water content α measured by a water content measuring device 77 and the wet weight β, measured by a sediment supply measuring device 78, of the conveyed sediment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled soil conditioner for receiving and supplying a solidified material by receiving earth and sand, and a solidified material control device provided therein.

[0002]

2. Description of the Related Art For example, in burial work for gas pipes, water and sewage works, and other road works and foundation works,
It is desirable to backfill the excavated construction soil. However, if the construction soil is not suitable for backfilling (for example, if it contains a large amount of rocks, brick pieces, concrete pieces, metal, or other foreign matter, or if the clay soil or highly weathered clay is too advanced) If the soil itself is soft and the soil itself is soft and backfilling may cause land subsidence, etc.), use a solidified material (soil improvement material) mainly composed of lime, cement, etc. The excavation site is buried after solidification and improvement to reusable high-quality soil (improved soil).

[0003] In such a machine for improving soil quality,
Based on the background of difficulty in securing land for a soil improvement plant or decentralization of land, for example, JP-A-2000-4526
As described in Japanese Patent Publication No. 3 (1993), a self-propelled soil improvement machine has been proposed in which the soil improvement machine is capable of running on its own and has mobility. This self-propelled soil improvement machine uses, for example, a soil hopper (a hopper)
Then, a solidifying material is added, mixed and stirred in a processing mechanism (mixing means), and the mixture (improved soil) is discharged by a carry-out conveyor.

Further, in the above-mentioned prior art, in order to obtain improved soil with higher quality, the amount of sediment supplied is measured by measuring the weight of the sediment being conveyed to conveying means (conveying conveyor) for supplying the sediment put into the hopper to the mixing means. Measuring means is provided, and the supply amount of the solidified material is controlled by controlling the rotation speed of a rotor of a supply unit (supplying means) for supplying the solidified material in accordance with the weight of the injected sediment measured by the soil supply amount measuring means. The mixing ratio of the earth and sand to the solidified material is controlled within a predetermined range.

[0005]

In recent years, under the background of the promotion of waste recycling such as the enforcement of the Recycling Resources Promotion Law (so-called Recycling Law) (October 1991), the need for reforming construction waste soil has increased. The usefulness of the self-propelled soil improvement machine is recognized in the middle, and as described above, various uses are being expanded in addition to reforming the construction soil as a backfill material for backfilling the excavated site. In other words, not only soil generated from construction, but also clay, mud, and field soil with a relatively high water content are modified, and ground material for grounds and parks, hydraulic roadbed material as aggregate for asphalt pavement of roads and burial It is being used in a variety of ways, such as being used as return material.

[0006] Further, the strength of the improved soil required according to the difference in the use is also different. For example, even when the improved soil is used for the roadbed material, it is not used as for the ordinary roadbed material. In some cases, it is sufficient if the strength is equal to or higher than a predetermined value over a long period of time, or there is a case where it is required to develop the strength equal to or higher than a predetermined value as quickly as possible, as in the case of using the material for a temporary road at a construction site.

At this time, the strength of the improved soil is increased by solidification as the contained solidified material reacts with moisture, so that the reaction speed of the solidified material greatly affects the timing of the strength development of the improved soil. Become. For example, improved soil with a relatively low water content is used for ordinary roadbed materials as described above,
When moisture such as rain is added, an appropriate water content ratio is achieved, and a predetermined strength or more is developed in the long term. On the other hand, an improved soil having a suitable moisture content is used from the beginning as a roadbed material of a temporary road at a construction site, so that a predetermined strength or more is quickly developed.

[0008] Further, moisture is closely related to the magnitude of the developed strength itself. That is, if the solidification material supply amount is determined only by the soil and sand weight without considering the water content ratio, the dry weight differs even at the same weight due to the magnitude of the water content ratio, and the expression strength differs because the mixing ratio of the soil and the solidification material changes. come. For example, the improved soil used when burying gas pipes is usually re-excavated later, but if the strength of the improved soil is too high, re-excavation may be difficult. It is necessary to express strength with high precision. At this time, the water content greatly affects quality control of the improved soil, and in order to perform quality control economically, it is necessary to develop a somewhat accurate strength at the time of production according to the control period etc. In some cases.

Furthermore, earth and sand generally have a water content ratio at which optimum compaction properties can be obtained, and when the improved soil is used for backfilling, it is particularly required for compaction properties such as roadbeds and roadbed materials. In the case of using it, it is desirable that it has an optimum water content ratio from the viewpoint of stabilization of the ground bearing capacity after execution and construction management.

In view of the above background, in order to control the magnitude of the strength of the improved soil, the timing of the strength development, the compaction property, and the like, corresponding to the expanded use as described above, the water content ratio of the input soil and sand is required. It is becoming important to consider.

However, the above-mentioned prior art controls the supply amount of the solidifying material in accordance with the weight of the injected soil and does not consider the water content of the improved soil. In some cases, it was not possible to respond sufficiently.

An object of the present invention is to provide a solidified material control device and a self-propelled soil improvement machine for a self-propelled soil improvement machine which can sufficiently respond to various needs for developing strength in response to the recent expansion of applications. To provide.

[0013]

SUMMARY OF THE INVENTION (1) In order to achieve the above object, the present invention provides a solidified material control apparatus for a self-propelled soil conditioner that supplies solidified material to received soil and reforms the soil. , A control means for supplying a solidifying material in accordance with the received water content of the earth and sand is provided.

In the present invention, for example, after the water content ratio of the received earth and sand is detected by the water content ratio detecting means, the solidified material is supplied by the first supply adjusting means in accordance with the detected value, or the solidification material is supplied by the input means in advance. After inputting the detected moisture content of the soil, the second supply adjusting means supplies the solidified material in accordance with the input value. For example, the control means supplies the solidified material in accordance with the received moisture content of the soil.

[0015] With this, it is possible to control the magnitude of the strength of the improved soil, the timing of the strength development, and the compactibility when the injected soil and the solidified material react with each other to develop the strength.
For example, soil improvement work at the time of gas pipe burial that needs to express strength with high precision within the target strength range, soil improvement work for ordinary roadbed material that is sufficient if strength over a predetermined level is expressed in the long term, In recent years, there has been an increase in the soil improvement work for temporary roads at construction sites where it is necessary to develop strength above a predetermined level as quickly as possible, or for soil improvement work for subgrades and roadbed materials where optimal compaction is desired. Satisfactorily can meet the needs of various strength expression modes in various applications.

(2) In order to achieve the above object, the present invention relates to a solidified material control device of a self-propelled soil improvement machine for supplying a solidified material to received soil and modifying the soil. And a first supply adjusting means for supplying a solidified material in accordance with the detected value.

(3) In order to achieve the above object, the present invention provides a method for controlling a solidified material of a self-propelled soil conditioner for supplying a solidified material to received soil and modifying the soil. Input means for inputting a water content ratio of earth and sand, and second supply adjusting means for supplying a solidified material according to the input value are provided.

(4) In the above (2) or (3), preferably, the apparatus further comprises sediment detecting means for detecting the received amount of sediment, wherein the first supply adjusting means or the second supply adjusting means comprises The solidified material is supplied according to the amount of sediment detected by the sediment detection means and the water content ratio detected by the water content ratio detection means or the water content ratio input by the input means.

(5) In the above (4), preferably,
The first supply adjusting unit or the second supply adjusting unit is configured to control the amount of sediment according to the amount of sediment detected by the sediment detecting unit and the water content detected by the water content detecting unit or the water content input by the input unit. Dry weight determining means for determining the dry weight,
Supply means for supplying a solidified material in accordance with the determined dry weight.

(6) In the above (5), preferably,
The supply unit supplies the solidified material according to the dry weight and the water content ratio detected by the water content ratio detection unit or the water content ratio input by the input unit.

(7) In the above (5), more preferably, the water content is adjusted according to the dry weight and the water content ratio detected by the water content ratio detection means or the water content ratio inputted by the input means. It further has ratio adjusting means.

(8) In order to achieve the above object,
The present invention relates to a hopper for receiving earth and sand, a water content detection means for detecting a water content of the received earth and sand, a first supply adjusting means for supplying a solidified material to the received earth and sand in accordance with the detected value, and A mixing device for introducing and mixing the earth and sand and the solidifying material.

(9) In order to achieve the above object,
The present invention provides a hopper for receiving earth and sand, input means for inputting a previously detected water content of the earth and sand, and second supply adjusting means for supplying a solidified material to the received earth and sand in accordance with the input value. A mixing device for introducing and mixing the soil and the solidified material.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a solidified material control device according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an entire structure of a self-propelled soil improvement machine to which one embodiment of a solidified material control device of the present invention is applied, and FIG. 2 is an embodiment of a solidified material control device of the present invention. It is a top view showing the whole structure of the self-propelled soil improvement machine to apply.

1 and 2, in this self-propelled soil improvement machine, soil to be improved is charged by a working tool such as a bucket of a hydraulic shovel, and the input soil is sorted to a predetermined particle size (see FIG. 1 and FIG. 2). Details will be described later) Sieve unit 1,
A hopper 2 for receiving the sediment selected by the sieve unit 1; a mixing device (processing tank) 3 for mixing the sediment introduced from the hopper 2 with a predetermined solidifying material (soil improving material) and discharging the mixture downward; Mixing device 3
Conveyor 6 for transporting and introducing the solidified material, a soil improvement machine main body 6 equipped with a solidification material supply device 5 for supplying the solidified material, and a traveling body 7 provided below the soil improvement machine main body 6 And a discharge conveyor 8 that receives the mixture mixed by the mixing device 3 and discharged downward, and conveys and discharges the mixture to the rear side (the right side in FIG. 1) of the self-propelled soil conditioner.

The traveling body 7 includes a main body frame 9 and left and right crawler tracks 10 as traveling means. The main body frame 9 is formed of, for example, a substantially rectangular frame, and includes the sieve unit 1, the hopper 2, the mixing device 3,
A soil improving machine mounting portion 9A constituting a chassis on which the solidified material supply device 5 and a power unit (machine room) 73 to be described later are mounted, the soil improving machine mounting portion 9A, the left and right crawler tracks 10, Frame section 9B for connecting
It is composed of In addition, the endless track crawler 10 includes a drive wheel 11 rotatably supported by the track frame 9B.
And the right and left traveling hydraulic motors 13L, 13R provided between the drive wheels 11
The self-propelled soil improvement machine is made to travel by applying a driving force by a hydraulic motor 13L for the left traveling (only shown in FIG. 1).

The sieve unit 1 is a so-called vibrating sieve capable of vibrating up and down, and together with the hopper 2, the front end (left side in FIG. 1) of the self-propelled soil improvement machine of the soil improvement machine mounting portion 9A. It is mounted above the unit. Further, the sieve unit 1 includes a support frame 17 elastically supported via a spring 16 on a support member 15 provided on a support post 14 erected on the soil improvement machine mounting portion 9A. Lattice member 18 mounted on support frame 17 (see FIG. 2)
A rotary drum 19 (see FIG. 2) having a vibration axis (not shown) of the lattice member 18 inserted therein; and a vibration hydraulic motor 20 for generating a driving force for rotating the rotary drum 19 (See FIG. 2). Then, by transmitting the driving force of the vibration hydraulic motor 20 to the rotary drum 19 via the belt 21 and rotating the same, the vibration axis (not shown) of the lattice member 18 inserted into the rotary drum 19 vibrates. Lattice member 18 and support frame 1
At this time, as shown in FIG. 1, the support frame 17 is provided on the front side (left side in FIG. 1) of the self-propelled soil improvement machine. Rear side (Fig. 1
(The middle right side), the lattice member 18 of the components of various sizes contained in the earth and sand charged into the sieve unit 1 due to the above-described vibration.
Of the grid member 18 is discharged from the grid member 18 to the front side (left side in FIG. 1) of the self-propelled soil improvement machine, and is discharged. 2 has been introduced. This eliminates solid foreign substances such as rocks, concrete, and metal blocks contained in the earth and sand, and also has a function of reducing the bulk density of the earth and sand so that sufficient air is contained inside the earth and sand.

The hopper 2 has an upper end fixed to the support member 15 and a lower end connected to the conveyor 4.
Is inclined at an angle corresponding to the inclination angle of. This hopper 2
Has a bottomless box-like shape (in other words, a substantially rectangular tube shape or a frame shape) whose diameter increases upward for the sake of convenience when the sediment is smoothly injected from the sieve unit 1. Is open. The size of the upper opening of the hopper 2 is the same as that of the sieve unit 1 in both the longitudinal direction and the width direction.
The width of the lower end is slightly smaller than the width of the conveyor belt 26 of the conveyor 4 described later. As a result, the earth and sand introduced from the sieve unit 1 are surely guided onto a conveyor belt 26 (described later) of the conveyor 4.

As shown in FIG. 1, the conveyor 4 is mounted on the front end (left side in FIG. 1) of the self-propelled soil improvement machine of the soil improvement machine mounting portion 9A.
And substantially below the sieve unit 1. The conveyor 4 has a lower upstream side (left side in FIG. 1) and a higher downstream side (right side in FIG. 1). Specifically, from the front of the self-propelled soil conditioner 9A of the soil conditioner mounting portion 9A. It is provided obliquely so as to rise rearward (from left to right in FIG. 1) at a predetermined angle. The transport conveyor 4 includes a frame 22, a transport belt 26 wound and provided between a drive wheel 24 and a driven wheel 25 supported by the frame 22 and driven by a transport conveyor hydraulic motor 23, A guide roller 27 for supporting the transport surface of the transport belt 26 is provided, and regulating plates 28 provided on both left and right sides in the width direction at the downstream end of the transport surface of the transport belt 26. The guide roller 27 is
The fixed rollers are supported by the frame 22 and abut against the rear surface of the transport surface of the transport belt 26 and roll by feeding the rollers. A plurality of rollers are arranged at a predetermined pitch interval. The transport conveyor 4 is provided with a well-known adjustment mechanism on the driven wheel 25 side so that the tension of the transport belt 26 can be adjusted appropriately.

FIG. 3 is a side sectional view showing the entire structure of the solidified material supply device 5. In FIG. 3, the solidification material supply device 5 is located on the rear side (the right side in FIG. 1) of the self-propelled soil improvement machine with respect to the sieve unit 1, and as shown in FIG.
It is mounted on the middle part in the longitudinal direction of the soil improvement machine mounting part 9A. Specifically, it is supported by a substantially rectangular base plate 30 provided on four (or three) columns 29 erected on the soil improvement device mounting portion 9A. At this time, the conveyor 4 is located at the rear side of the self-propelled soil improvement machine (FIG. 1).
The middle portion (right side) is extended to a position between the columns 29, 29, and in such a positional relationship, the solidified material supply device 5 immediately above the downstream end of the conveyor 4
A predetermined amount of solidifying material is added to the earth and sand supplied from the hopper 2 on the conveyor 4 (details will be described later).

As shown in FIG. 3, the solidification material supply device 5
It has a storage tank 31 for storing a predetermined amount of solidified material, and a feeder 32 connected to a lower portion of the storage tank 31 and supplying the solidified material by a predetermined amount.

The storage tank 31 has a substantially cylindrical shape as a whole and has a space for storing the solidified material therein. The lower side is provided on the base plate 30 and has a bottomed cylindrical lower tank portion 33. , A top plate portion 34 having a substantially circular shape, and a bellows portion 35 as an upper tank portion having a variable upper volume provided between the lower tank portion 33 and the top plate portion 34.

The top plate portion 34 is formed of a plate whose outer peripheral side is bent downward, and has a substantially circular opening 36 at the center thereof.
The opening 36 is provided with an openable / closable lid 37 above the opening 36. The cutter 3 is located below the portion of the top plate 34 where the opening / closing lid 37 is provided.
The cutter 38 is attached to a support arm 39 connected to the lower surface of the opening / closing lid 37.

When filling the storage tank 31 with the solidified material, a crane 40 (see FIG. 2) provided on one side of the soil improvement machine mounting portion 9A is used. That is, the opening / closing lid 37 provided on the top plate portion 34 is opened, the flexible container is lifted by the crane 40, inserted into the storage tank 31 from the opening 36, and the flexible container is pressed against the cutter 38 by its own weight, and the lower end portion thereof is pressed. To supply the solidified material inside the flexible container into the storage tank 31. At this time, the solidified material is reliably removed from the storage container 31 from the flexible container cut by the cutter 38.
The support arm 39 to which the cutter 38 is attached is provided at a position where the support arm 39 has entered a predetermined depth from the top plate 34 so as not to flow into the inside and overflow or scatter around.

The lower tank section 33 includes a bottom plate 41 and a peripheral body section 42, as shown in FIG. At this time, the bottom plate 41 is provided with a solidified material supply opening 43 having a predetermined opening diameter.
Supplies the solidified material to the feeder 32. In order to realize a smooth and reliable supply to the feeder 32, a hopper stirring means 44 is provided at a lower portion in the lower tank portion 33.

The agitating means 44 in the hopper includes a rotating shaft 45 extending through the center of the bottom plate 41 of the lower tank portion 33.
And a plurality of main stirring blades 46 attached to the lower tank part 33 in the lower tank portion 33. On the other hand, the lower tank portion 3 of the rotating shaft 45
At a position outside the bottom plate 3, it is connected to a stirring hydraulic motor 47 fixedly provided on the back side of the bottom plate 41. Here, the stirring hydraulic motor 47 may be configured by an electric motor or the like.

The radially outer end of the main stirring blade 46 extends to the vicinity of the inner surface of the peripheral body 42 of the lower tank portion 33, and connects the front ends of the main stirring blades 46 in the circumferential direction. Thus, the ring-shaped holding member 48 is fixedly provided. In the holding member 48, one or a plurality of auxiliary stirring blades 49 are respectively mounted between connecting portions to the main stirring blades 46 located at the front and rear. Each of the auxiliary stirring blades 49 protrudes from the radially inner surface of the holding member 48 along the bottom plate 41 of the lower tank portion 33 toward the rotation shaft 45 by a predetermined length.

FIG. 4 is a side sectional view showing the detailed structure of the feeder 32. As shown in FIG. In FIG. 4, the feeder 32
Has a casing 50 fixed to the lower surface of the solidified material supply opening 43 in the storage tank 31.

The casing 50 has a solidified material supply opening 4.
3 and a supply port 52 opened downward, and an intermediate wall surface of the supply port 52 is an arc-shaped quantitative supply section 53. Inside the fixed quantity supply unit 53, a rotor 54 is provided.
The rotor 54 is configured to be rotatably driven by a not-shown feeder motor, such as a variable-speed electric motor, for example. The rotor 54 has a fixed amount supply unit 53
A plurality of partition walls 56 substantially slidably contacting the inner wall surface are provided radially, and every time the rotor 54 rotates by a predetermined angle, the solidified material corresponding to the space between the adjacent partition walls 56, 56 is separated. The solidified material for the volume of the space is supplied in a fixed amount.

Therefore, by controlling the rotation speed of the rotor 54, the supply amount of the solidified material can be controlled. That is, the higher the rotation speed of the rotor 54, the larger the supply amount of the solidified material. In this way, the feeder 32 can supply the solidified material at the adjusted supply amount.

The hopper 2, the conveyor 4 and the solidifying material supply device 5 described above function as a material supplying section for supplying a material comprising soil and solidified material for improving the soil.

FIG. 5 is a top view showing the detailed structure of the mixing device 3, and FIG. 6 is a side sectional view taken along the line VI-VI in FIG. 5 and 6, the mixing device 3 is provided at a longitudinally intermediate portion of the soil improvement device mounting portion 9A, and includes a mixing device main body 57 composed of a rectangular container arranged substantially in the horizontal direction, The main body 57 is provided on the front side of the self-propelled soil improvement machine (left side in FIG. 5) and the rear side of the self-propelled soil improvement machine (right side in FIG. 5) so as to protrude on both sides in the width direction. Mounting part 9A
And a feeder for the earth and sand and solidified material supply device 5 provided from the transport conveyor 4 and provided at an upper portion of the mixing device main body 57 on the front side (left side in FIG. 5) of the self-propelled soil improvement machine. An inlet 59 for introducing the solidified material from the inlet 32, an outlet 60 provided at the lower part of the mixing device main body 57 on the rear side (right side in FIG. 5) of the self-propelled soil improvement machine, It has an even number (two in this embodiment) of paddle mixers 61 provided in parallel.

The paddle mixer 61 has a rotating shaft 62
And a plurality of blades (paddles) 63 intermittently provided as a stirring / transferring member on the rotating shaft 62, and bearings 64, 64 for rotatably supporting both ends of the rotating shaft 62, respectively.

At this time, the rear end of the rotating shaft 62 extends into a driving section 65 provided at the rear end of the mixing device main body 57. A transmission gear 66 is connected to the rear end of each rotating shaft 62, and the two transmission gears 66, 66 mesh with each other. One (upper in FIG. 5) transmission gear 66 is connected to the output shaft of the mixing device hydraulic motor 67.
By rotationally driving the hydraulic motor 67 for the mixing device, the two rotary shafts 62, 62 are simultaneously rotationally driven in opposite directions.

At this time, a large number of paddles 63 are provided on the outer peripheral surface of each rotary shaft 62 so as to form a predetermined angle (for example, every 90 °) as shown in FIGS. By rotating the rotating shaft 62 as described above, the paddle 63 is driven to rotate, and the earth and sand and the solidified material guided into the mixing device main body 57 are transferred toward the discharge port 60 while being agitated and uniformly mixed. It has become so. Note that the transfer amount can be appropriately adjusted by changing the angle of the paddle 63.

As described above, the earth and sand introduced from the inlet 59 of the mixing device main body 57 and the solidified material are uniformly stirred and mixed by the action of the paddle mixer 61, and the outlet 6
0, during which the improved soil is produced. The improved soil thus produced is discharged onto the discharge conveyor 8 from the discharge port 60 by the action of its own weight.

Although the mixing device main body 57 has a closed shape except for the inlet 59 and the discharge port 60, the side or upper surface of the mixing device main body 57 is opened and closed for inspection and repair of the inside of the mixing device main body 57. A door 68 is provided. Further, this opening / closing door may be provided on the lower surface.

The mixing device 3 described above functions as a processing mechanism for stirring and mixing the earth and sand with the solidified material.

Returning to FIG. 1 and FIG. 2, the discharge conveyor 8 drives the transport belt 70 by the hydraulic motor 69 for the discharge conveyor, whereby the mixture dropped from the mixing device 3 onto the transport belt 70 (improved Soil).

The discharge conveyor 8 has a support member 71 (see FIG. 1) near the discharge end (right side in FIG. 1).
Via the power unit loading member 72, which is located on the rear side of the self-propelled soil conditioner (the right side in FIG. 1) from the mixing device 3 and is mounted on the soil conditioner mounting portion 9A via the power unit loading member 72. Supported. Also, a portion (not shown) near the end opposite to the discharge side (left side in FIG. 1).
And the intermediate portion 74 in the transport direction is the mounting portion 9
It is located below A. Among them, the intermediate portion 74 in the transport direction is supported so as to be hung from the soil improving machine mounting portion 9A via an intermediate member 75, and a portion near the end opposite to the discharge side (left side in FIG. 1). Are also supported so as to be suspended from the soil improvement device mounting portion 9A via a support member (not shown).

With the support structure described above, the discharge conveyor 8 extends horizontally for a small distance in the discharge direction below the mixing device 3 as shown in FIG. In the space below the end portion 76, it is arranged to extend obliquely upward in the discharge direction (rightward in FIG. 1).

The discharge conveyor 8 described above functions as an improved soil discharge section.

Here, the sieve unit 1, the mixing device 3,
The conveyor 4, the discharge conveyor 8, the left and right crawler tracks 10, and the stirring means 44 in the hopper are provided with a power source provided in the self-propelled soil improvement machine, that is, an engine (not shown) as a motor and the engine. Driven by power from at least one hydraulic pump (not shown). The pressurized oil from the hydraulic pump is passed through a control valve device (not shown) having a control valve for controlling the direction and flow rate of the pressurized oil, the sieve unit 1, the mixing device 3, the transport conveyor 4, and the discharge conveyor. 8, the hydraulic motor 20 for vibration, the hydraulic motor 67 for the mixing device, the hydraulic motor 23 for the conveyor, the hydraulic motor 69 for the discharge conveyor, and the left・ Hydraulic motor 1 for right running
It is supplied to the 3L, 13R and agitation hydraulic motors 47, whereby the corresponding hydraulic motors are rotationally driven.
The engine, the hydraulic pump, and the control valve device are all provided in the power unit 73.

In the area of the power unit 73 in front of the self-propelled soil improvement machine (on the left side in FIG. 1), a driver's seat, which is a section where an operator rides, is provided. The driver's seat includes the left and right wheels provided in the control valve device.
An operating means (for example, a left / right operating lever) for controlling a driving speed of the left / right traveling hydraulic motors 13L and 13R by switching a right traveling control valve (not shown) is provided.

The self-propelled soil improvement machine having the basic configuration as described above is provided with the solidified material control device of the present embodiment.
This solidified material control device includes a water content ratio measuring device 77 for measuring the water content ratio of the injected earth and sand, a soil and sand supply amount measuring device 78 for measuring the weight of the conveyed sediment, and a sediment dry weight obtained from these detection results. The controller includes a controller that controls the supply amount of the solidifying material in accordance with the control signal, and the feeder 32 that supplies the solidifying material in accordance with an output signal of the controller.

FIG. 7 is a diagram schematically showing a schematic mounting structure of the water content ratio measuring device 77 provided in one embodiment of the solidified material control device of the present invention. In FIG. 7, a water content measuring device 77 is a known device that measures the water content based on the dielectric constant of an object to be measured, and as shown in FIG. 7, for example, the inner wall surface of the hopper 2 (or It may be provided in a conveying route of the conveying conveyor 4 or the like, which may be in a sediment conveying route before the solidifying material is added to the injected earth and sand. The water content measuring device 77 includes a plurality (two in this example) of electrodes 79a,
79b, a main body 80 provided with a computing unit (not shown), and a cable 81 for electrically connecting the main body 80 to the controller.
When 79b comes into contact with the injected earth and sand, electrodes 79a, 7
The dielectric constant of the injected sediment is calculated by a calculator in the main body 80 from the potential difference between the input and output terminals 9b, and the water content ratio of the injected sediment is further calculated from the dielectric constant. Output.

At this time, the electrode 79b is a substantially rod-shaped electrode, and the electrode 79a has a substantially semi-cylindrical shape such that the electrode 79b is positioned at the center of the axis and covers the periphery thereof.

Although not shown, in order to protect the electrodes 79a and 79b of the water content measuring device 77 from collision with the earth and sand introduced from the sieve unit 1, a portion of the inner wall surface of the hopper 2 above the electrode 79 is provided. May be provided with a plate-shaped or net-shaped cover.

FIG. 8 is a view showing the structure of the earth and sand supply amount measuring device 78 provided in one embodiment of the solidified material control device of the present invention. In FIG. 8, the earth and sand supply amount measuring device 78 is connected to the hopper 2 in the transport path of the transport conveyor 4.
During the addition of the solidifying material by the feeder 32 (hereinafter referred to as the earth and sand weight measurement section), and the guide roller 2 of the conveyor 4 in the earth and sand weight measurement section.
A weight measuring roller 82 provided at a substantially intermediate position of the transfer belt 26 so as to abut on the back side of the transfer surface of the transfer belt 26, a bearing member 83 fixed to the frame 22, and a swingable swing by the bearing member 83. The swinging plate 84 is supported and has the weight measuring roller 82 at one end, and a load sensor 85 located at the other end of the swinging plate 84 and electrically connected to the controller.

That is, when the earth and sand is conveyed by the conveyor belt 26 and reaches the earth and sand weight measurement section, the conveyor belt 26 is bent by its weight, and the weight measuring roller 82 is pushed in the direction of arrow A in FIG. The other end of 84 swings in the direction of arrow A in FIG. At this time, the load on the load sensor 85 increases, and the load sensor 85 outputs to the controller the weight of the earth and sand that is being conveyed in the earth and sand weight measurement section as the wet weight β.

In this embodiment, the earth and sand supply amount measuring device 78 is provided in the conveying path of the conveyor 4 and the wet weight β of the earth and sand is directly measured.
8 may be provided in the transport path of the discharge conveyor 8 to measure the weight of the improved soil, and indirectly determine the wet weight β of the transported soil on the transport conveyor 4 from the weight of the improved soil.

The controller is electrically connected to a feeder motor (not shown) of the feeder 32, and calculates the dry weight of the soil and sand during transportation calculated by multiplying the input wet weight β by the water content ratio α. Calculate a command signal (rotation speed command signal δ) for controlling the rotation speed based on γ,
The output is supplied to the feeder motor.

FIG. 9 is a flowchart showing a control procedure by the controller. In FIG. 9, first, in step 10, the controller
7, the water content ratio α of the earth and sand is inputted. Then, in step 20, the wet weight β of the earth and sand is input from the weight sensor 85 of the earth and sand supply amount measuring device 78. Then, in step 30, a dry soil weight γ is calculated from the input wet weight β and water content ratio α. Thereafter, in step 40, a rotation speed command δ (x0) for controlling the rotation speed of the feeder motor based on the calculated soil dry weight γ.
Is calculated. Here, the procedure of calculating the rotation speed command δ (x0) will be described below. That is, the controller stores the mixing amount (= mixing ratio ε) of the solidified material with respect to the dry weight γ of the earth and sand, which is required in advance to obtain the predetermined strength F of the improved soil by the preliminary test. FIG.
Is the strength F of the improved soil determined by this preliminary test.
FIG. 4 is a diagram showing a relationship between the amount of solidified material and the mixing amount (= mixing ratio ε) with respect to the dry weight γ of earth and sand. That is, soil with a predetermined water content is sampled, several types of improved soil having a mixing ratio ε are manufactured using the soil and cured for a predetermined period, and the strength F developed in each improved soil is measured. A curve representing the relationship between F and the mixing ratio ε was obtained. By using this curve, the mixing ratio ε0 corresponding to the strength F0 desired to be obtained after the improvement can be uniquely obtained. And
The solidification material supply amount x0 is determined from the soil / sand dry weight γ calculated in step 30 and the mixture ratio ε0, and the corresponding feeder motor rotation speed command δ (x0) is calculated. When the above procedure is completed, the process proceeds to step 50. Step 5
If the value is 0, the calculated rotation speed command δ (x0) is output to the feeder motor, and the flow ends.

In the above, the controller and the feeder 3
2 constitutes control means for supplying the solidifying material in accordance with the received water content of the earth and sand described in each claim.

Further, the water content ratio measuring device 77 constitutes a water content ratio detecting means for detecting the water content ratio of the sediment received, and the sediment supply amount measuring device 78 constitutes a sediment detecting means for detecting the sediment amount received.

Then, steps 30 to 5 of the controller
0 and the feeder 32 constitute first supply adjusting means for supplying the solidified material in accordance with the amount of sediment detected by the sediment detecting means and the water content ratio detected by the water content ratio detecting means. Step 30 of the controller constitutes dry weight determining means for determining the dry weight of the soil according to the amount of sediment detected by the sediment detecting means and the water content ratio detected by the water content ratio detecting means. 40 and step 50
Constitute supply means for supplying the solidified material in accordance with the determined dry weight.

Next, the operation and operation of this embodiment will be described below. For example, when earth and sand are put into the sieve unit 1 of the self-propelled soil improvement machine by a bucket or the like of a hydraulic shovel, the sediment component sorted by the sieve unit 1 and passed through the lattice member 18 is introduced into the lower hopper 2. You. The earth and sand received by the hopper 2 is placed on the conveyor belt 26 of the conveyor 4 below the earth and sand, and is conveyed toward the rear of the self-propelled soil improvement machine. Then, near the downstream end of the conveyor 4 in the conveying direction, a predetermined amount of solidifying material is added from the storage tank 31 to the surface of the conveyed soil via the feeder 32, and the mixture is introduced into the mixing device 3. Is done.

The earth and sand and the solidified material introduced into the mixing device 3 are uniformly stirred and mixed by the paddle mixers 61, 61 in the mixing device main body 57 to form an improved soil in the aggregated state, and the conveyed belt of the discharge conveyor 8 70. Then, the improved soil is further conveyed to the rear of the self-propelled soil conditioner by the discharge conveyor 8, and finally discharged from the rear part of the self-propelled soil conditioner.

Here, the strength of the improved soil is greatly affected by the reaction rate between the moisture contained in the injected earth and sand and the solidified material. In other words, the improved soil increases its strength by solidifying as the contained solidifying material reacts with moisture, and in recent years, in order to respond to the use of improved soil that is expanding,
It is important to control the strength of the improved soil by considering the water content of the input soil.

Therefore, in the present embodiment, as described above, the water content ratio α of the injected sediment is measured, and the solidified material is determined in accordance with the soil dry weight γ obtained from this and the wet weight β of the conveyed sediment. Supply. That is, the water content measuring device 77
By, before the solidifying material is added in the soil and sand transport path, the water content ratio α is measured and output to the controller,
Further, the wet weight β of the conveyed sediment on the conveyer 4 is measured by the sediment supply amount measuring device 78 and output to the controller. The controller calculates the transported sediment dry weight γ from the input water content ratio α and wet weight β, and obtains the required strength F1 from this and the stored mixing ratio ε obtained and stored in advance by a preliminary test. The solidification material supply amount x0 is obtained. A rotation speed command δ (x0) for controlling the rotation speed of the feeder 32 is calculated. The feeder 32 is driven to rotate at a rotation speed according to the rotation speed command δ (x0) input from the controller, and supplies the solidified material supply amount x0 to the dry weight γ of the conveyed earth and sand on the conveyor 4.

As described above, the soil dry weight γ is calculated by subtracting the amount of water contained in the soil based on the water content ratio α, and the mixing ratio ε0 for obtaining the desired strength F0 is determined using the soil dry weight γ as a parameter. , The obtained optimum mixing ratio ε0
To supply the solidified material. As a result, as in the prior art in which the solidification material supply amount x is determined only by the soil wet weight β without considering the water content α, the soil dry weight γ is large even with the same soil wet weight β having a large water content α. Unlike this, the mixing ratio ε between the earth and sand and the solidified material does not vary. Therefore, the desired strength F of the improved soil can be accurately expressed,
For example, sufficiently respond to the needs of various strength expression modes in recently expanded applications, such as soil improvement work when burying gas pipes that need to express strength with high precision within the target strength range. Can be.

In the above description, the water content ratio α of the input soil is detected by the water content ratio measuring device 77 and output to the controller, and the controller sends the rotation speed command δ (x0) to the feeder 32 according to the table of FIG. The output is configured, but is not limited to this. For example, the water content ratio measuring apparatus 77 is separately configured as a single unit, and the operator holds a table and data corresponding to FIG. 10 by himself, and operates the excavated earth and sand before putting it into the self-propelled soil improvement machine. The user may insert the electrodes 79a and 79b of the water content ratio measuring device 77 into the earth and sand, measure the water content α of the earth and sand in advance, and manually input the above into the controller using a separately provided operation panel or the like. In this case, the controller may perform the procedure from step 20 to step 50 in FIG. 9 according to the manually input water content ratio α, and further, calculate the rotational speed command δ (x0) in step 40. The table or data of FIG. 10 used at that time may be carried by the operator himself, and the mixing ratio ε may be manually input to the controller before step 40.

In this case, the operation panel separately provided constitutes an input means for inputting a water content ratio of earth and sand detected in advance. Steps 30 to 50 of the controller
And feeder 32 constitute second supply adjusting means for supplying the solidified material in accordance with the input value, wherein step 30 of the controller determines the amount of sediment detected by the sediment detecting means and the water content inputted by the input means. The dry weight determining means for determining the dry weight of the earth and sand.

In the above description, the controller calculates the soil dry weight γ from the water content ratio α and the wet weight β, and supplies the solidified material at a predetermined mixing ratio ε to the dry weight γ. . At this time, the mixing ratio ε is determined by a preliminary test using earth and sand having a predetermined water content, as described above, and the relationship with the strength is obtained under the condition of the predetermined water content. , And was uniquely represented by one curve shown in FIG. However, strictly speaking, when the water content of the earth and sand changes, the relationship between the strength and the mixing ratio also changes accordingly. That is, the intensity-mixing ratio curve of FIG. 10 shifts according to the water content ratio α. Therefore,
Furthermore, in order to control the improved soil strength with high precision, it is conceivable to perform the control in consideration of the influence of the soil water content ratio on the strength. Hereinafter, such a modified example will be described.

FIG. 11 shows the relationship between the strength F of the improved soil and the ratio (= mixing ratio ε) of the supply amount x of the solidified material with respect to the dry weight γ of the earth and sand, which was obtained by a preliminary test in which the water content was varied. FIG. 12 shows the desired intensity F1 shown in FIG.
FIG. 6 is a diagram showing a relationship between a water content ratio α of the improved soil and a mixing ratio ε of the solidified material for obtaining the improved soil.

FIG. 11 shows different water content ratios α1 to α
3 (α1>α2> α3), three types of soil A, B, and C were tested for the purpose of preventing complexity in this example. If it is desired to control the mixing ratio with high precision, the number of test objects should be further increased), and several types of improved soils having various mixing ratios were produced using earth and sand A, B, and C, respectively, and cured for a predetermined period. Thereafter, the results of measuring the strength of each improved soil are represented by three curves A, B, and C representing the relationship between the strength and the mixing ratio ε for the improved soil using the soils A, B, and C, respectively. For example, by setting a predetermined strength F1 to be obtained after the improvement shown in FIG. 11 for each of these curves, the mixing for obtaining the improved soil of the predetermined strength F1 for the soils A, B and C having different water content ratios. The ratios ε1 to ε3 are obtained. This mixing ratio ε1 to ε3
By obtaining the relationship between the water content ratio α1 and α3, FIG.
As shown in FIG. 2, the water content ratio α for obtaining the required strength F1
A single curve representing the relationship between and the mixing ratio ε can be obtained. In this modification, for example, the table shown in FIG. 12 is set in the controller in advance.

FIG. 13 is a flowchart showing the control procedure of the controller according to this modification. In FIG. 13, the controller first inputs the water content ratio α from the main body 80 of the water content ratio measurement device 77 or the separately provided operation panel in step 110. Then, in step 120, the wet weight β is input from the weight sensor 85 of the earth and sand supply amount measuring device 78. Then, in step 130, the soil dry weight γ is calculated from the input water content ratio α and wet weight β. Then, at step 140,
Based on the water content ratio α input in step 110, the mixing ratio ε that gives the required strength F1 is obtained from FIG. 12, and from this and the soil dry weight γ calculated in step 130, the solidification material supply amount x1 is obtained. A rotation speed command δ (x1) for controlling the rotation speed of the feeder motor to be operated is calculated. Then, in step 150, the calculated rotational speed command δ (x
1) is output to the feeder motor, and this flow ends.

Thus, the required strength F shown in FIG. 11 and FIG.
Since the solidifying material can be supplied so as to have an optimum mixing ratio ε for obtaining 1, a predetermined strength can be developed in the improved soil with higher accuracy.

It is to be noted that a plurality of required intensities shown in FIG. 11 are set, a plurality of curves in FIG. 12 are prepared, and the characteristic curve is appropriately selected by the operator by inputting the expression intensity. It may be.

In the above, the water content ratio is used for the purpose of controlling the expression intensity with high accuracy according to the application, but the present invention is not limited to this. That is, since the reaction rate of the solidified material is related to the change in moisture as described above, it is conceivable to use the water content ratio to control the reaction rate to control the timing of the development of the improved soil strength. Hereinafter, such modified examples will be described. The present modified example is a configuration in which a water content ratio adjusting device 86 is newly provided in the mixing device 3 of the self-propelled soil improvement machine, and other configurations are the same as those of the above-described embodiment of the solidified material control device of the present invention. Description is omitted because there is.

FIG. 14 is a side view showing the overall structure of the water content ratio adjusting device 86 of the present modification. FIG. 15 is a top view showing the entire structure of the water content adjusting device 86 of the present modification.
Is a front view showing the overall structure of the water content ratio adjusting device 86 of the present modified example.

In FIGS. 14 to 16, the water content ratio adjusting device 86 includes a water storage tank 87 (see FIG. 14).
And a plurality of (four in this example) nozzle portions 88 composed of, for example, pipe joints such as so-called elbows and cheeses, and water from the water storage tank is directed to the nozzle portions 88. It comprises a water passage section 89 for guiding, such as a pipe or a hose, and a control valve 90 (see FIG. 14) provided in the water passage section 89 to control the flow rate of water passing through the water passage section 89.

As shown in FIG. 14, the water storage tank 87 is disposed at a position higher than at least the nozzle portion 88, and when the control valve 90 is opened, water in the water storage tank 87 passes through the water passage portion 89. Water is discharged from the nozzle part 88, and water is sprayed from the inlet 59 to the mixture of the earth and sand and the solidified material in the mixing device 3.

The control valve 90 is electrically connected to the controller. The control valve 90 sprays the mixture of the earth and sand and the solidified material in the mixing device 3 in response to a watering amount command ζ (described later) from the controller. The amount of water is adjusted.

Although the nozzle portion 88 is configured to use a pipe joint, the present invention is not limited to this. For example, a nozzle that sprays water like a shower, such as a watering can be used. Further, the water storage tank is provided at a higher position than the nozzle portion 88 and water is sprinkled by its own weight. However, the present invention is not limited to this. For example, a pump or the like may be separately provided.

FIG. 17 is a flowchart showing a control procedure by the controller. In this FIG.
First, at step 210, the controller inputs the water content ratio α from the main body 80 of the water content ratio measurement device 77 or the separately provided operation panel. In step 220, the wet weight β from the weight sensor 85 of the earth and sand supply amount measuring device 78 is input. In step 230, the earth and sand dry weight γ is calculated from the input water content ratio α and wet weight β. In step 240, the water content ratio α input in step 210 and the dry soil weight γ calculated in step 250
And a target water content α ′ input by the operator in advance, calculate a watering amount (water supply amount) such that the water content ratio of the soil becomes the target water content ratio α ′, and calculate a watering amount command ζ corresponding thereto. I do. Regarding the method of determining the target water content α ′ at this time,
Preliminary tests to measure the time required to develop the required strength (in other words, the reaction speed) for the target soil and sand with various water content ratios are performed, and based on the data, the operator can accurately obtain the required strength development. May be input, or an approximate target water content α ′ may be input based on past experience. In any case, the target moisture content α ′ may be determined and input according to the short-term or long-term strength development time. When step 240 is completed, step 25
Move to 0. In step 250, the calculated watering amount command ζ
Is output to the control valve 90. Step 2
In step 60, for example, based on the characteristics shown in FIG. 10 (or the soil dry weight γ and the target moisture content α ′) stored in advance based on the soil dry weight γ calculated in step 230, for example, From the characteristics shown in FIGS. 11 and 12, the desired intensity F0 (or intensity F
The mixing ratio ε0 (or any one of the mixing ratios ε1 to ε3) corresponding to 1) is obtained, and the solidification material supply amount x0 (or the solidification amount) is determined from the mixing ratio ε0 (or any of ε1 to ε3) and the soil dry weight γ. Material supply amounts x1 to x3 (hereinafter abbreviated) are calculated, and a corresponding rotation speed command δ (x0) for controlling the rotation speed of the feeder motor is calculated. In step 270, the calculated rotation speed command δ (x0) is output to the feeder motor, and this flow ends.

In the above, steps 240 and 250 of the controller and the water content ratio adjusting device 86
Constitutes a water content ratio adjusting means for adjusting the water content ratio according to the dry weight and the water content ratio detected by the water content ratio detecting means or the water content ratio inputted by the input means.

As described above, in the present modification, the reaction rate of the solidified material can be controlled by controlling the water content ratio α to the desired target water content ratio α ′, and the timing of the strength development of the improved soil can be controlled. In recent years, such as soil improvement work for ordinary road subbase materials that require sufficient strength to develop over a long term, and soil improvement work for temporary roads at construction sites where it is necessary to develop strength above a certain level as quickly as possible. Can more fully respond to the needs of various strength expression modes in the expanded applications of the invention.

In the above description, the target water content α ′ was determined so as to obtain a desired reaction rate. However, the present invention is not limited to this. That is, as described above, soil and sand generally have a water content ratio α at which optimum compaction properties can be obtained, and when the improved soil is used for backfilling, compaction properties are particularly required as in subgrades and roadbed materials. When it is used for various applications, it is desirable that the water content ratio α be the optimum from the viewpoint of stabilization of the ground support force after the execution and construction management.

Therefore, the water content ratio α may be determined so as to obtain the optimum compactibility. This modification will be described below. In this modification, a water content ratio α for obtaining the desired compaction property of the improved soil is determined by a preliminary test.

FIG. 18 is a diagram showing the relationship between the compactibility S of the improved soil and the water content α obtained by the preliminary test.

FIG. 18 shows the sampling of several types of soil (having four types, but more types may be used when it is desired to obtain a water content ratio with which the optimum compactibility can be obtained with higher accuracy). Then, an improved soil having a predetermined mixing ratio is produced using each of them, and after curing for a predetermined period, a result of a compaction test performed on each improved soil is expressed as a relationship between compaction property S and water content α. . From this figure, it is possible to obtain a predetermined water content ratio α0 that provides the best compactibility S0.

This characteristic is a characteristic uniquely determined according to the type of earth and sand. In the present modification, the water content ratio α0 obtained in this manner is used in step 2 described above.
40 is used instead of the target water content α ′. This allows
Since the compaction property S of the improved soil can be controlled (optimally) to a desired value, a subgrade where optimal compaction property is desired,
It is possible to sufficiently respond to the needs of various forms of strength development in recently expanded applications such as roadbed materials.

Another embodiment of the present invention will be described with reference to FIG. This embodiment is an embodiment of the present invention,
11 to 13, 14 to 17, or 18
In the modification of the above, instead of the water content ratio measuring device 77 that measures the water content ratio of the soil by detecting the dielectric constant, a water content ratio measuring device 77A that measures the water content ratio α of the soil by the amount of microwave attenuation is used. This is an embodiment of the present invention. Note that the other configuration is the same as that of the above-described embodiment of the solidified material control device of the present invention, and a description thereof will be omitted.

FIG. 19 is a view showing the entire structure of a water content ratio measuring device 77A provided in another embodiment of the solidified material control device of the present invention. In FIG. 19, a water content ratio measuring apparatus 77A measures the water content ratio by applying microwaves to the soil and measuring the attenuation of microwaves passing through the soil. Conveyor 4
Is provided before the earth and sand exit the hopper 2 and the solidified material is added by the feeder 32 in the earth and sand transport path. That is, a generator 91 provided on one side in the width direction of the conveyor 4 for transmitting a predetermined amount of microwaves
And a measuring device 92 that is provided on the other side in the width direction of the conveyor 4 and measures the amount of reception of the microwaves transmitted from the generator 91, and passes between them by the conveyor 4. The generator 91 applies a predetermined amount of microwaves to the conveyed earth and sand, and the amount of microwaves that have passed through the earth and sand is measured by the measuring device 92.

In order to prevent the generator 91 or the measuring device 92 from contacting the conveyed earth and sand on the conveyor belt 26, substantially plate-shaped covers 93 are provided on both sides in the width direction of the conveyor belt 26.

The measuring device 92 is electrically connected to the controller, converts the measured amount of microwave into a water content ratio α, and outputs it to the controller. The controller performs the control described with reference to FIG. 9, FIG. 13, or FIG. 17 based on the input water content ratio α.

In this embodiment, the water content ratio measuring device 77A constitutes a water content ratio detecting means for detecting the received water content ratio of the earth and sand described in the claims.

According to the present embodiment configured as described above, according to the embodiment of the present invention, FIGS.
3, an effect similar to that of the modified example of FIG. 14 to FIG. 17 or FIG. 18 is obtained.

In the above, the mixing of the earth and sand and the solidified material was performed in the mixing device 3 by the mixing method using the paddle mixer 61. However, the present invention is not limited to this, and is disclosed in Japanese Patent Application Laid-Open No. 9-195265. As described above, a mixing apparatus using a so-called crushing method may be used. Further, the case where the crawler track 10 is provided as the traveling means has been described as an example, but the invention is not limited thereto, and the traveling means may be configured by a wheel type or the like. Furthermore, the sieve unit 1 provided on the hopper 2 is a vibration sieve, but is not limited thereto, and may be a fixed sieve. In these cases, a similar effect is obtained.

[0101]

According to the present invention, since the solidified material is supplied in accordance with the water content of the injected earth and sand, the intensity of the expressed strength, the time of occurrence, or the tightening when the strength is developed by reacting with the injected earth and sand. It is possible to control the hardening property and the like, and therefore, it is possible to sufficiently respond to the needs of various strength expression modes in recent expanded applications.

[Brief description of the drawings]

FIG. 1 is a side view showing the entire structure of a self-propelled soil improvement machine to which an embodiment of a solidified material control device according to the present invention is applied.

FIG. 2 is a top view showing the entire structure of a self-propelled soil conditioner to which an embodiment of a solidified material control device according to the present invention is applied.

FIG. 3 is a side sectional view showing an entire structure of a solidified material supply device provided in a self-propelled soil conditioner to which one embodiment of the solidified material control device of the present invention is applied.

FIG. 4 is a side sectional view showing a detailed structure of a feeder constituting one embodiment of a solidified material control device of the present invention.

FIG. 5 is a top view showing a detailed structure of a mixing device constituting one embodiment of a solidified material control device of the present invention.

6 is a side sectional view taken along a line VI-VI in FIG. 5;

FIG. 7 is a diagram schematically showing the entire structure of a moisture content measuring device constituting one embodiment of a solidified material control device of the present invention.

FIG. 8 is a diagram schematically illustrating an entire structure of a soil and sand supply amount measuring device that constitutes an embodiment of a solidified material control device of the present invention.

FIG. 9 is a flowchart illustrating a control procedure by a controller constituting the solidified material control device according to an embodiment of the present invention.

FIG. 10 is a diagram showing the relationship between the strength of the improved soil and the mixing ratio of the solidified material with respect to the dry weight of the soil determined by a preliminary test.

FIG. 11 is obtained by a preliminary test in which the water content used in the modified example of controlling the supply amount of the solidified material in accordance with the change in the water content of the earth and sand is variously changed in one embodiment of the solidified material control device of the present invention. It is a figure showing the relationship between the strength of the improved soil obtained, and the mixing ratio of the solidification material with respect to the dry weight of earth and sand.

FIG. 12 shows an improved soil for obtaining a desired strength used in a modified example of controlling the supply amount of the solidifying material in accordance with a change in the water content of the earth and sand in one embodiment of the solidifying material control device of the present invention. FIG. 3 is a diagram showing a relationship between a water content ratio of a solidified material and a mixing ratio of a solidified material to a dry weight of earth and sand.

FIG. 13 is a flowchart illustrating a control procedure of a controller in a modified example in which the supply amount of the solidifying material is controlled in accordance with a change in the water content ratio of the earth and sand in one embodiment of the solidifying material control device of the present invention.

FIG. 14 is a side view showing an entire structure of a water content ratio adjusting device provided in a modified example for controlling a water content ratio in one embodiment of the solidified material control device of the present invention.

FIG. 15 is a top view showing the entire structure of a water content ratio adjusting device provided in a modified example for controlling the water content ratio in one embodiment of the solidified material control device of the present invention.

FIG. 16 is a front view showing an entire structure of a water content ratio adjusting device provided in a modified example for controlling a water content ratio in one embodiment of the solidified material control device of the present invention.

FIG. 17 is a flowchart illustrating a control procedure by a controller in a modified example of controlling the water content ratio of earth and sand in one embodiment of the solidified material control device of the present invention.

FIG. 18 shows the relationship between the compaction property of the improved soil and the water content ratio obtained by a preliminary test used in a modification for controlling the water content ratio of soil and sand in one embodiment of the solidified material control device of the present invention. FIG.

FIG. 19 is a diagram illustrating an entire structure of a moisture content measuring device provided in another embodiment of the solidified material control device of the present invention.

[Explanation of symbols]

2 Hopper 3 Mixing device 32 Feeder (supply means, first supply adjusting means, control means) 77 Moisture ratio measuring device (moisture ratio detecting means, control means) 77A Moisture ratio measuring device (moisture ratio detecting means, control means) 78 Earth and sand Supply amount measuring device (soil detection means, control means) 86 Water content adjustment device (water content adjustment device) α Moisture content α 'Target moisture content β Wet weight γ Sediment dry weight δ Rotation speed command ε Mixing ratio 水 Water spray command

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E02D 3/12 102 E02D 3/12 102 (72) Inventor Yoshihiro Hoshino 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Hitachi Ken (72) Inventor Fujio Sato 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture F-term (reference) 2D040 AB07 CD07 EB04 4G035 AB48 AE13 4G037 AA03 AA18 BA06 BB13 BC01 BD03 BD10 EA03 4G078 AA01 AB01 BA01 BA07 CA01 CA05 CA12 CA17 DA01 EA10 EA20

Claims (9)

[Claims] 1. A solidified material control device for a self-propelled soil improvement machine for supplying solidified material to received soil and modifying the soil, wherein the control means supplies the solidified material according to the water content of the received soil. A solidified material control device for a self-propelled soil improvement machine, comprising 2. A solidified material control device for a self-propelled soil improvement machine for supplying a solidified material to the received soil and modifying the soil, comprising: a water content ratio detecting means for detecting a water content ratio of the received soil. A solidified material control device for a self-propelled soil improvement machine, comprising: first supply adjusting means for supplying a solidified material according to a detected value. 3. A solidified material control device for a self-propelled soil improvement machine for supplying a solidified material to received soil and modifying the soil, comprising: input means for inputting a previously detected moisture content of the soil; A solidified material control device for a self-propelled soil improvement machine, comprising: second supply adjusting means for supplying a solidified material according to an input value. 4. The solidified material control device for a self-propelled soil improvement machine according to claim 2, further comprising a sediment detecting means for detecting the received amount of sediment, wherein the first supply adjusting means or the second supply adjusting means is provided. The supply adjusting means supplies the solidified material according to the amount of sediment detected by the sediment detecting means and the water content detected by the water content detecting means or the water content input by the input means. Material control device for self-propelled soil improvement machine. 5. The solidified material control device for a self-propelled soil improvement machine according to claim 4, wherein the first supply adjusting means or the second supply adjusting means comprises: a sediment amount detected by the sediment detecting means and the water content ratio. Dry weight determining means for determining the dry weight of earth and sand according to the water content ratio detected by the detecting means or the water content ratio input by the input means, and supply means for supplying a solidified material in accordance with the determined dry weight A solidified material control device for a self-propelled soil improvement machine, comprising: 6. The solidified material control device for a self-propelled soil improvement machine according to claim 5, wherein said supply means comprises:
A solidified material control device for a self-propelled soil improvement machine, wherein the solidified material is supplied according to the water content ratio detected by the water content ratio detection means or the water content ratio input by the input means. 7. The solidified material control device for a self-propelled soil improvement machine according to claim 5, wherein the solidified material control device according to the dry weight and the water content detected by the water content detection means or the water content inputted by the input means. A solidification material control device for a self-propelled soil improvement machine, further comprising a water content ratio adjusting means for adjusting a water content ratio by using a control device. 8. A hopper for receiving earth and sand, a water content detecting means for detecting a water content of the received earth and sand, a first supply adjusting means for supplying a solidified material to the received earth and sand according to the detected value, A self-propelled soil improvement machine having a mixing device for introducing and mixing the soil and the solidified material. 9. A hopper for receiving earth and sand, input means for inputting a previously detected moisture content of the earth and sand, and second supply adjusting means for supplying a solidified material to the received earth and sand in accordance with the input value. And a mixing device for introducing and mixing the soil and the solidified material.