JPH10251045A - Apparatus for producing cement mixture-improving soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of utilizing even gravel and rocks of a prescribed grain size or above as the material for cement mixture- improving soil and is capable of stably and continuously producing the cement mixture-improving soil having consistent quantity. SOLUTION: This apparatus has a crushing means 10 which crushes the aggregate of the prescribed grain size or above among the gravel and rocks to the prescribed grain size or below, a cement paste producing means 30 which produces a cement paste by mixing the cement and water, a mixing means 25 which kneads and mixes the cement past and at least the aggregate crushed by this crushing means, aggregate transporting means 21, 22, 23, 24 which transport the crushed aggregate from the crushing means to the mixing means, a transporting quantity detecting means which detects the transporting quantity of the aggregate to be transported by the aggregate transporting means, a cement paste transporting means 28 which transmits the cement paste produced by the cement paste producing means up to the mixing means and a control means which controls the transporting quantity of the cement paste by the detection signal of the aggregate transporting quantity detecting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved cement-mixed soil producing apparatus for producing a concrete material used in construction of a structure such as a dam.

[0002]

2. Description of the Related Art Temporary closing works and embankment slope protection works provided in dam construction work do not require high strength like the dam body, and are required to reduce workability and construction costs.
In order to realize this, it has been proposed to use a so-called improved cement-mixed soil. Here, the cement-improved soil is a concrete material produced by adding cement and water to gravel and rocks collected at and near the construction site and kneading the cement and water. An apparatus has been proposed in JP-A-6-328430.
That is, in the apparatus proposed in Japanese Patent Laid-Open No. 6-328430, large-diameter gravels having a predetermined particle size or more in the collected gravels are removed by a sizing means, and only gravels having a predetermined particle size or less are mixed by a conveyor to a mixing means. During the transportation, the cement and the water are added during the transportation by the conveyor. As the mixing means, a means provided with a vibration mechanism for vibrating a screen arranged at an inclination is used.

[0003]

In the above-described apparatus for producing improved cement-mixed soil, since the gravel having a predetermined particle size or more is removed by the sizing means, large-diameter gravel cannot be effectively used. Moreover, since the mixing of the gravel, the cement and the water is performed by the inclined screen, it is difficult to sufficiently knead and mix, and it is difficult to stably obtain a cement-mixed improved soil of a constant quality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to make it possible to use sand and gravel having a predetermined grain size or more as a material for a cement-improved soil, and to provide a cement of constant quality. It is an object of the present invention to provide a device which can produce a mixed improved soil.

It is another object of the present invention to provide an apparatus capable of stably and continuously producing improved cement-mixed soil of a constant quality.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is an apparatus for producing a concrete material using gravel or rock collected near a construction site of a structure as an aggregate. A crushing means for crushing aggregates having a predetermined particle size or more of the aggregate to a predetermined particle size or less, a cement paste manufacturing means for mixing cement and water to produce a cement paste, and the cement paste manufacturing means. Mixing means for kneading the produced cement paste and at least the aggregate crushed by the crushing means; aggregate transport means for conveying the crushed aggregate from the crushing means to the mixing means; A transport amount detecting means for detecting a transport amount of the aggregate transported by means, and the cement paste produced by the cement paste producing means, A cement paste conveying means for conveying the cement paste to a step, and a control means for controlling a conveying amount of the cement paste by a detection signal of the aggregate conveying amount detecting means. .

In the present invention, since the mixing means is used for kneading the cement paste and the aggregate, a simple device such as a biaxial forced kneading mixer may be employed as the mixing means.

In the apparatus for producing improved cement-mixed soil according to the present invention, the cement paste producing means includes: a batch mixer for mixing water and cement; a cement supply means for supplying a predetermined amount of cement to the batch mixer; Water supply means for supplying water to the batch mixer, and a holding tank for receiving and holding the cement paste from the batch mixer, wherein the holding tank detects the remaining amount of cement paste therein, A level sensor for instructing the batch mixer, the water supply means and the cement supply means to start the production of the cement paste according to the remaining amount may be provided.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a simplified view schematically illustrating the apparatus configuration of the present invention, FIG. 2 is a side view showing a crawler crusher as a crushing means in the present invention, and FIG. 3 is a cement paste in the present invention. FIG. 3 is a simplified diagram shown to explain an apparatus configuration of a manufacturing unit and a cement paste conveying unit.

In FIG. 1, an apparatus for producing improved cement-mixed soil according to the present invention includes so-called discarded rock 40 and large-diameter gravel, which have a predetermined particle size or more among rocks and riverbed gravel collected from a rough rock near a dam construction site. Is crushed to a predetermined particle size or less, and is a device for producing concrete produced by using this as an aggregate, that is, a cement-mixed improved soil.
Crawler crusher 10 for crushing sand and large-diameter sand and gravel to a predetermined particle size or less to produce an aggregate, a cement paste producing apparatus 30 for producing a cement paste by mixing cement and water, and a cement paste A twin-screw continuous mixer 25 for mixing at least the aggregate produced by the crawler crusher 10, a wheel loader 21 and an apron feeder 22 used to transport the aggregate from the crawler crusher 10 to the twin-screw continuous mixer 25 , Hopper 23 and belt conveyor 2
4, a transport amount detecting device (not shown) for detecting the transport amount of the aggregate transported by the belt conveyor 24, and the cement paste produced by the cement paste producing device 30 to the biaxial forced continuous mixer 25. It has a schematic configuration including a cement paste pumping pump 28 and a controller (not shown) for controlling the cement paste pumping amount based on a detection signal of the aggregate transport amount detecting device.

In the apparatus according to the present invention, the aggregate produced by crushing the waste rock 40 by the crawler crusher 10 and the gravel or rock having a predetermined particle size or less from the time of collection are mixed with the cement-mixed soil ( That is, a device for mixing both of these aggregates may be provided so as to be able to manufacture concrete), or both aggregates may be sequentially conveyed by the wheel loader 21 so that both aggregates are mixed. May be mixed.

More specifically, as shown in FIG. 2, the crawler crusher 10 includes
A hopper 11 provided at the rear for receiving the large and small diameter sand and gravel, an ultra-jaw 12 for receiving the waste rock 40 and the large diameter sand and gravel from the hopper 11 and crushing it, and a waste rock 4
Belt conveyor 15 for transporting aggregates produced by crushing 0 or large-diameter gravel to a predetermined particle size or less from ultra-jaw 12.
A power unit 14 as a power source for operating the entire apparatus, and a crawler 1 for moving and traveling the entire apparatus.
7 and an operation panel 16 for operating the crawler crusher 10.

The cement paste producing apparatus 30
As shown in FIG. 3, a mixer 33 for mixing water and cement, a water supply tank 32 for storing water to be supplied to the mixer 33, a cement silo 31 for storing cement to be supplied to the mixer 33, and a mixer 33 And a storage tank 34 for temporarily storing the cement paste kneaded in the above. Here, cement silo 3
A pipe 31b extends from 1 to a mixer 33 via an inlet valve 31a. And the mixer 33
Is a load cell 3 for measuring the weight of water and cement supplied to the mixer vessel 33b.
3c, a stirring blade 33a that mixes the measured water and cement put into the mixer container 33b to produce a cement paste, and is formed on the bottom surface of the mixer container 33b for discharging the cement paste into the storage tank. And a discharge valve 33d provided at an opening (not shown). A pipe 33e extends from the discharge valve 33d to the storage tank 34. The storage tank 34 is provided with the mixer 3
And a tank body 34b for receiving the cement paste supplied from the tank body 3 through a pipe 33e.
4b, a level sensor 34c for detecting the volume of the cement paste, and an agitator 34a for appropriately stirring the cement paste so that the cement does not separate and settle to the bottom. A pipe 34 extends from the bottom of the tank body 34b.
e extends to the cement paste pumping pump 28, and this pipe 34e is provided with a valve 34d. Further, the water supply tank 32 includes a tank body 32 for storing water.
a, a level sensor 32b for detecting the amount of water in the tank main body 32a, and a water supply pump 32c for pumping water from the inside of the tank main body 32a to the mixer 33, and a water supply pump 32c through a valve 32d. A pipe 32e communicating with the mixer 33 is provided.

In the cement paste manufacturing apparatus 30, when the level sensor 34c detects that the amount of cement paste in the storage tank 34 has become equal to or less than a predetermined amount, the mixer 33 starts manufacturing the cement paste. That is, the cement inlet valve 31a is opened, the cement is measured by the load cell 33c, and the valve 32d is also supplied from the water supply tank 32 by supplying water. Similarly, the cement is measured by the load cell 33c, and the measured water and cement are measured. Is put into a mixer 33 where it is mixed to produce a cement paste in a batch manner. Then, this cement paste passes through the pipe 33e through the opened discharge valve 33d, and is stored in the storage tank 34.
Supplied to The cement paste in the storage tank 34 is
The valve 34d is adjusted and opened according to the output from the control device, and the two-shaft forced continuous mixer 2 is
5 is continuously pumped through the pipe.

In the present embodiment, the conveyance amount detecting device is provided on the belt conveyor 24, and detects a weight of the aggregate 42 conveyed on the belt conveyor 24; A speed sensor (not shown) for detecting the conveying speed of the belt conveyor 24 by detecting the rotation speed of the guide roller of the conveyor 24, and controlling the data provided here to control the cement paste manufacturing apparatus 30. Output to the device. Then, by integrating the detected weight information and the speed information, the transport amount of the aggregate 42 per unit time by the belt conveyor 24 is detected.

Next, the operation of the apparatus of the present invention will be described with reference to FIG. Waste rock 40 and large-diameter gravels that cannot be used as aggregates because of the particle size of the rocks and riverbed gravels, etc. of the raw rock mountain are transported to a temporary storage site by a dump truck (not shown). Then, in the temporary storage site, the waste rock 40 and large-diameter sand and gravel are introduced into the crawler crusher 10 by the backhoe 41, and are crushed to a predetermined particle size or less so that they can be used as aggregate.

The aggregate 42 produced by the crawler crusher 10 is fed into the hopper 23 by the wheel loader 21. Further, the aggregate 42 is sequentially fed from the hopper 23 to the belt conveyor 24 by the apron feeder 22 at a uniform feed amount. Sent in. While the aggregate 42 sent to the belt conveyor 24 is being conveyed, the conveyance amount is detected by the conveyance amount detection device, and the aggregate 42 is continuously fed into the biaxial forced continuous mixer 25. In addition, hopper 2
As the aggregate to be charged into 3, the aggregate 42 produced only by the crawler crusher 10 is used, or both the gravel and the rock and the aggregate 42 having a predetermined particle size or less from the beginning are used. Is also good.

On the other hand, the control device provided in the cement paste producing device 30 receives the output data from the transport amount detecting device and receives the output data from the valve 34 of the cement paste producing device 30.
The cement paste is released while adjusting d, whereby the required amount of cement paste is supplied to the pump 28, which is further continuously pumped to the twin-screw forced continuous mixer 25.

Then, in the twin-shaft forced continuous mixer 25,
The aggregate 42 and the cement paste continuously charged as described above are continuously kneaded to produce concrete (ie, cement-mixed improved soil), which is conveyed by the belt conveyor 26 and transferred to the hopper 27.
And sequentially supplied to the dump truck 29.

[0020]

As described above, the apparatus for producing improved cement-mixed soil of the present invention is provided with crushing means. Therefore, most of the gravel and rocks collected at and near the construction site can be used without waste, and effective use of resources can be achieved. Also, the aggregate produced by crushing, the transport amount is detected by the aggregate transport amount detection means,
According to the transport amount, the control means controls the transport amount of the cement paste, and the cement paste is sequentially mixed by the mixing means, so that a cement-mixed improved soil of a constant quality can be manufactured. Further, in the prior art, since cement, water and aggregate are mixed together by mixing means, there is a disadvantage that the quality of the improved cement-mixed soil tends to vary, whereas the cement-mixed soil of the present invention has a disadvantage. In the improved soil production equipment, a cement paste of a predetermined concentration is produced in advance by a cement paste production means, and the cement paste and the aggregate are mixed, so that the materials are easily and uniformly kneaded and mixed to have a constant quality. An improved cement-mixed soil can be obtained. Therefore, a simple device such as a twin-screw forced continuous mixer can be employed as the mixing means.

Further, since the cement paste producing means of the present invention includes a batch mixer and a holding tank provided with a level sensor, when the amount of cement paste in the holding tank becomes equal to or less than a predetermined amount, the batch mixer uses a predetermined concentration. Is manufactured and supplied into the holding tank, and a certain amount or more of the cement paste is always held in the holding tank. Therefore, from the holding tank, it is possible to always continuously supply the cement paste of a predetermined concentration to the mixing means, and if it is operated continuously with other means, a large amount of cement mixed improved soil is produced with a constant quality. be able to.

[Brief description of the drawings]

FIG. 1 is a simplified diagram showing a device configuration of the present invention.

FIG. 2 is a side view showing a crawler crusher as crushing means of the present invention.

FIG. 3 is a simplified diagram showing an apparatus configuration of a cement paste producing means and a cement paste conveying means in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Crawler crusher (crushing means) 21 Wheel loader (aggregate conveying means) 22 Apron feeder (aggregate conveying means) 23 Hopper (aggregate conveying means) 24 Belt conveyor (aggregate conveying means) 25 Biaxial forced continuous mixer (mixing) Means) 28 Cement paste pressure pump (Cement paste transfer means) 30 Cement paste production means

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 592093833 Aoyama Kiko Co., Ltd. 2-58-8 Kita-Aoyama, Minato-ku, Tokyo (72) Inventor Kiyohiko Ujiie 66 Onna, Atsugi-shi, Kanagawa Prefecture Miyakase, Kanto Regional Construction Bureau, Ministry of Construction Inside the dam construction office (72) Inventor Shunichi Kawamura 66 Onna 66, Atsugi-shi, Kanagawa Prefecture Ministry of Construction, Kanto Regional Construction Bureau Inside the Miyagase Dam Construction Office (72) Inventor Hideki Tsuchiya 66 Onna, Atsugi-shi, Kanagawa Prefecture Construction of the Kanto area, Ministry of Construction Bureau Miyagase Dam Construction Office (72) Inventor Kaoru Sato Onna 66, Atsugi-shi, Kanagawa Prefecture Ministry of Construction, Kanto Regional Construction Bureau Miyagase Dam Construction Office (72) Inventor Kiminori Yoshida 1-3-1, Otemachi 1-chome, Chiyoda-ku, Tokyo No. 72, Kanto Regional Construction Bureau, Ministry of Construction (72) Inventor Inoue Moji 2-5-8 Kitaaoyama, Minato-ku, Tokyo ) Inventor Takashi Kojima 2-5-8 Kitaaoyama, Minato-ku, Tokyo Intra-company group (72) Inventor Takeshi Kanate 4-6-115 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Nakamori Junichiro 13-4 Arakicho, Shinjuku-ku, Tokyo Sumitomo Construction Co., Ltd. (72) Inventor Hideo Yoshii 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Aoyama Kiko Co., Ltd.

Claims (2)

[Claims] 1. An apparatus for producing a concrete material using gravel or rock collected near a construction site of a structure as an aggregate, wherein the aggregate having a predetermined particle size or more is selected from the aggregate. Crushing means for crushing to a diameter or less, cement paste producing means for producing cement paste by mixing cement and water, cement paste produced by the cement paste producing means and aggregate crushed by at least the crushing means Mixing means for kneading the, and aggregate transport means for transporting the crushed aggregate from the crushing means to the mixing means,
Transport amount detecting means for detecting the transport amount of the aggregate transported by the aggregate transport means; cement paste transport means for transporting the cement paste produced by the cement paste producing means to the mixing means; and Control means for controlling the amount of cement paste conveyed by a detection signal of a material conveyed amount detecting means. 2. The cement paste producing means includes: a batch mixer for mixing water and cement; a cement supply means for supplying a predetermined amount of cement to the batch mixer; and a predetermined amount of water to the batch mixer. A water supply means, and a holding tank for receiving and holding the cement paste from the batch mixer, wherein the holding tank detects the remaining amount of the cement paste therein and manufactures the cement paste in accordance with the remaining amount. The improved cement-mixed soil producing apparatus according to claim 1, further comprising a level sensor for instructing start of the batch mixer, the water supply unit, and the cement supply unit.