JPH101670A - Production of granular improved soil - Google Patents
Production of granular improved soilInfo
- Publication number
- JPH101670A JPH101670A JP17862396A JP17862396A JPH101670A JP H101670 A JPH101670 A JP H101670A JP 17862396 A JP17862396 A JP 17862396A JP 17862396 A JP17862396 A JP 17862396A JP H101670 A JPH101670 A JP H101670A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- granular
- powder
- water
- soluble polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002689 soil Substances 0.000 title claims abstract description 108
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 37
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000007873 sieving Methods 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000004575 stone Substances 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000010276 construction Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 9
- 230000035699 permeability Effects 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- 239000006148 magnetic separator Substances 0.000 description 3
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000011041 water permeability test Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- 244000215068 Acacia senegal Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 229920000569 Gum karaya Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 241000934878 Sterculia Species 0.000 description 1
- 229920001615 Tragacanth Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920001284 acidic polysaccharide Polymers 0.000 description 1
- 150000004805 acidic polysaccharides Chemical class 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 239000000305 astragalus gummifer gum Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- -1 bean gum Chemical class 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 235000010494 karaya gum Nutrition 0.000 description 1
- 239000000231 karaya gum Substances 0.000 description 1
- 229940039371 karaya gum Drugs 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粒状改良土の製造
方法に関するものであり、詳しくは、例えば、上下水道
工事、道路工事、宅地造成工事などの一般の土木・建設
工事に伴って発生する残土（以下、建設残土と略記す
る）等の含水土壌を改良して各種用途の資源として再利
用を図るのに適した粒状改良土の工業的に有利な製造方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing granular improved soil, and more specifically, it is generated with general civil engineering and construction work such as water and sewage works, road works, and residential land development works. The present invention relates to an industrially advantageous method for producing granular improved soil suitable for improving hydrous soil such as residual soil (hereinafter abbreviated as construction residual soil) and reusing the soil as resources for various uses.
【０００２】[0002]
【従来の技術】従来、建設残土の殆どは再利用できず、
その一部は埋立て処分されているものの、不法投棄や環
境への影響が問題になってきている。斯かる問題を解決
するため、近時、プラントにおける建設残土の石灰処理
による再生利用が検討されつつある。その背景は次の通
りである。すなわち、従来、道路工事の掘り起こし現場
の埋め戻しには山砂が使用されていたが、山砂採取場所
でも環境破壊の問題が起こるため、建設残土を石灰で処
理して改良土とし、山砂の代りに使用する必要がある。2. Description of the Related Art Conventionally, most of construction remains cannot be reused.
Although some of them are landfilled, illegal dumping and environmental impacts have become a problem. In order to solve such a problem, recycling of construction residual soil in a plant by lime treatment has recently been studied. The background is as follows. Conventionally, mountain sand has been used for backfilling excavation sites for road construction, but environmental destruction also occurs at the site where mountain sand is collected. Need to be used instead.
【０００３】しかしながら、上記の石灰処理法は、含水
比の低い良質な建設残土のみを対象としているため、含
水比の高い建設残土が持ち込まれた場合は、石灰処理前
に建設残土の天日乾燥を行わねばならず、それがために
広大な敷地を必要とする欠点がある。斯かる欠点を解消
するため、本発明者の一人は、先に、特開平６−１７０
５２号公報において、建設残土を天日乾燥せずにそのま
まプラントで粒状にし得る改良土の製造方法を提案し
た。この方法で得られる改良土は、道路の配管埋め戻し
の用途においては、山砂より作業性が良好であり、施工
後の物性も優れていることが立証されている。[0003] However, the above-mentioned lime treatment method is intended only for high-quality construction waste soil having a low water content. Therefore, when construction waste soil having a high water content is brought in, the construction waste soil is dried before the lime treatment. Has the disadvantage that it requires extensive grounds. In order to solve such a drawback, one of the present inventors has previously described Japanese Patent Application Laid-Open No. 6-170.
In Japanese Patent Publication No. 52, a method for producing an improved soil that allows the remaining construction soil to be granulated in a plant without drying in the sun is proposed. It has been proved that the improved soil obtained by this method has better workability than mountain sand and excellent physical properties after construction in the use of backfilling pipes on roads.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、建設残
土の再利用率を高めるには、透水性などが高く種々の用
途に利用出来る優れた物性の改良土を効率良く製造する
必要がある。本発明は、斯かる実情に鑑みなされたもの
であり、その目的は、建設残土などの含水土壌を改良し
て各種用途の資源として再利用を図るのに適した粒状改
良土の工業的に有利な製造方法を提供することにある。However, in order to increase the recycle rate of construction surplus soil, it is necessary to efficiently produce soil having high properties such as high permeability and usable for various purposes. The present invention has been made in view of such circumstances, and an object thereof is to provide an industrially advantageous granular improved soil suitable for improving hydrous soil such as construction residual soil and reusing it as a resource for various uses. To provide a simple manufacturing method.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明の要旨
は、含水土壌と水溶性重合体粉末とを回分式撹拌混合槽
に供給して処理することにより粒状土壌とした後、得ら
れた粒状土壌を定量供給機に供給して連続的に定量排出
し、その流れから必要に応じて金属異物を除去し、次い
で、粒状土壌と固化剤粉末とを回転円筒型の篩分機兼用
混合機に連続的に定量供給して粒状土壌の表面に固化剤
粉末を付着させると同時に篩分処理することを特徴とす
る粒状土壌の製造方法に存する。That is, the gist of the present invention is to provide a granular soil by supplying a hydrous soil and a water-soluble polymer powder to a batch type stirring and mixing tank and treating the same. The soil is supplied to a constant-quantity feeder to continuously discharge a constant amount, and metal foreign substances are removed from the flow as necessary. Then, the granular soil and the solidifying agent powder are continuously fed to a rotary cylindrical type sieve / mixer. The present invention provides a method for producing granular soil, characterized in that a fixed amount of the solidifying agent powder is adhered to the surface of the granular soil while being sieved.
【０００６】[0006]
【発明の実施の形態】以下、本発明を添付図面に基づい
て詳細に説明する。図１は、本発明の製造方法の一例の
工程説明図、図２は、本発明の製造工程で好適に使用さ
れるベルトコンベア型定量供給機の概略説明図、図３
は、本発明の製造工程で好適に使用される回転円筒型の
篩分機兼用混合機の一例の説明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an explanatory view of an example of the production method of the present invention, FIG. 2 is a schematic explanatory view of a belt-conveyor-type quantitative feeder suitably used in the production process of the present invention, and FIG.
FIG. 2 is an explanatory view of an example of a rotary cylinder type sieve / mixer suitably used in the production process of the present invention.
【０００７】先ず、本発明で使用される含水土壌と水溶
性重合体粉末について説明する。本発明において、含水
土壌としては、特に制限されないが、前述の建設残土が
代表的に使用される。土質の改良が期待できる建設残土
の含水比の範囲は、土質によって異なるが、例えば関東
ロームの場合は、通常４０〜２００％、好ましくは５０
〜１５０％である。一方、水溶性重合体粉末としては、
含水土壌の団粒化機能を有する一般的な水溶性重合体粉
末が制限なく使用できるが、カルボキシル基含有重合体
粉末が好適に使用される。First, the hydrous soil and the water-soluble polymer powder used in the present invention will be described. In the present invention, the hydrous soil is not particularly limited, but the above-mentioned construction residual soil is typically used. The range of the water content ratio of construction residual soil in which improvement of soil quality can be expected depends on the soil quality. For example, in the case of Kanto loam, it is usually 40 to 200%, preferably 50%.
１５０150%. On the other hand, as the water-soluble polymer powder,
Although a general water-soluble polymer powder having a function of aggregating hydrous soil can be used without limitation, a carboxyl group-containing polymer powder is preferably used.
【０００８】カルボキシル基含有重合体としては、例え
ば、アラビアガム、カラヤガム、トラガントガム、アル
ギン酸塩類などの天然酸性多糖類、カルボキシメチルセ
ルロース、カルボキシメチルハイドロキシエチルセルロ
ース等の半合成の水溶性高分子物質、グアーガム、ロー
カストビーンガム等の中性多糖類変性物、ポリアクリル
酸塩類などの合成水溶性高分子物質が例示されるが、こ
れらの中では、ポリアクリル酸塩類などの合成水溶性高
分子物質が好適である。Examples of the carboxyl group-containing polymer include natural acidic polysaccharides such as gum arabic, karaya gum, tragacanth gum, alginates, semi-synthetic water-soluble polymer substances such as carboxymethylcellulose and carboxymethylhydroxyethylcellulose, guar gum, and locust. Modified neutral polysaccharides such as bean gum, and synthetic water-soluble polymer substances such as polyacrylates are exemplified. Among these, synthetic water-soluble polymer substances such as polyacrylates are preferable. .
【０００９】上記のポリアクリル酸塩類の具体例として
は、（メタ）アクリル酸またはその塩と（メタ）アクリ
ルアミドとの共重合体、マレイン酸またはその塩と酢酸
ビニルとの共重合体、イタコン酸またはその塩と（メ
タ）アクリルアミドとの共重合体などが挙げられるが、
これらの中では、（メタ）アクリル酸またはその塩と
（メタ）アクリルアミドとの共重合体が好適である。Specific examples of the above polyacrylates include a copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide, a copolymer of maleic acid or a salt thereof and vinyl acetate, and an itaconic acid. Or a copolymer of a salt thereof and (meth) acrylamide.
Among these, a copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide is preferred.
【００１０】上記の（メタ）アクリル酸またはその塩と
（メタ）アクリルアミドとの共重合体としては、（メ
タ）アクリル酸又はその塩と（メタ）アクリルアミドを
共重合したものの他、（メタ）アクリルアミドの単独重
合体を部分加水分解したものでもよい。また、上記の単
量体を組合せた共重合体の他、共重合可能なアクリル又
はビニル単量体などを一緒に共重合させたものでもよ
い。The copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide includes, in addition to (meth) acrylic acid or a salt thereof and (meth) acrylamide, May be obtained by partially hydrolyzing a homopolymer of the above. Further, in addition to a copolymer obtained by combining the above-mentioned monomers, a copolymerizable copolymerizable acrylic or vinyl monomer may be used.
【００１１】合成水溶性重合体の場合、全単量体単位に
対するカルボキシル基含有単量体の割合は、通常１〜１
００モル％、好ましくは５〜６０モル％の範囲とされ
る。カルボキシル基は、遊離酸または塩の何れの形で存
在していてもよい。なお、上記の水溶性重合体は、何れ
も、粉末として使用されるが、その平均粒径は、通常
０．４ｍｍ以下とされる。In the case of a synthetic water-soluble polymer, the ratio of the carboxyl group-containing monomer to all monomer units is usually from 1 to 1
The content is in the range of 00 mol%, preferably 5 to 60 mol%. The carboxyl group may be present in either the free acid or salt form. Note that any of the above water-soluble polymers is used as a powder, and the average particle size is usually 0.4 mm or less.
【００１２】先ず、本発明においては、含水土壌（Ａ）
と水溶性重合体粉末（Ｂ）とを回分式撹拌混合槽（１）
に供給して処理することにより粒状土壌（Ｃ）とする。
回分式撹拌混合槽（１）には、モルタルミキサー、ニー
ダー、一軸撹拌混合槽、二軸撹拌混合槽などが使用され
る。First, in the present invention, the hydrous soil (A)
And a water-soluble polymer powder (B) in a batchwise stirring and mixing tank (1)
And treated to obtain granular soil (C).
As the batch type stirring / mixing tank (1), a mortar mixer, a kneader, a single-shaft stirring / mixing tank, a twin-shaft stirring / mixing tank, or the like is used.
【００１３】本発明において、回分式撹拌混合槽（１）
としては、二軸撹拌混合槽が好適に使用される。二軸撹
拌混合槽は、ケーシングの内部において、２本の回転軸
が各軸受によって平行に支持され、各回転軸には複数の
アームが設置され、各回転軸および複数のアームには撹
拌羽根が取り付けられた構造を備えている。そして、各
回転軸は各モーターによって駆動され、各モーターはイ
ンバーター制御により回転速度を自由に変えることが出
来る。In the present invention, a batch type stirring and mixing tank (1)
For this purpose, a twin-screw mixing tank is suitably used. In the twin-screw mixing tank, two rotating shafts are supported in parallel by respective bearings inside the casing, a plurality of arms are installed on each rotating shaft, and a stirring blade is provided on each rotating shaft and the plurality of arms. It has an attached structure. Each rotation shaft is driven by each motor, and each motor can freely change the rotation speed by inverter control.
【００１４】上記の回分式撹拌混合槽（１）において、
計量された含水土壌（Ａ）は、ホッパー（１１）より供
給され、水溶性重合体粉末（Ｂ）が添加された後、所定
時間処理されて造粒される。得られた粒状土壌（Ｃ）
は、排出口（１２）が開放することにより、落下して排
出される。図１に例示した工程は、含水土壌（Ａ）の処
理量が大きい場合を想定し、２基の回分式撹拌混合槽
（１）を並列に配置した２連回分式撹拌混合槽となって
いるが、必ずしもその必要はない。２連回分式撹拌混合
槽の場合は、左右の回分式撹拌混合槽（１）、（１）に
おいて、交互に混合および造粒が行なわれる。In the above-mentioned batch type stirring and mixing tank (1),
The weighed hydrous soil (A) is supplied from the hopper (11), and after being added with the water-soluble polymer powder (B), is processed for a predetermined time to be granulated. The obtained granular soil (C)
Is dropped and discharged by opening the discharge port (12). The process illustrated in FIG. 1 is a two-stage batch type mixing and mixing tank in which two batch type mixing and mixing tanks (1) are arranged in parallel, assuming a case where the treatment amount of the hydrous soil (A) is large. However, it is not necessary. In the case of a two-stage batch type stirring / mixing tank, mixing and granulation are performed alternately in the left and right batch type stirring / mixing tanks (1) and (1).
【００１５】水溶性重合体粉末（Ｂ）の添加量は、含水
土壌（Ａ）の含水比により異なるため一概に決定し得な
いが、含水土壌（Ａ）に対し、通常０. ００１〜１重量
％、好ましくは０. ０１〜０. ５重量％とされる。本発
明においては、最終製品の粒状改良土の平均粒径を支配
する粒状土壌（Ｃ）の調製に回分式撹拌混合槽（１）を
使用したことにより、その滞留時間を任意に選択するこ
とが出来、その結果、容易にして所望の平均粒径の粒状
改良土を製造することが出来る。The amount of the water-soluble polymer powder (B) cannot be determined unconditionally because it varies depending on the water content of the water-containing soil (A), but is usually 0.001-1% by weight based on the water-containing soil (A). %, Preferably 0.01 to 0.5% by weight. In the present invention, the residence time of the batch type mixing and mixing tank (1) can be arbitrarily selected by using the batch type stirring and mixing tank (1) for preparing the granular soil (C) that controls the average particle size of the granular improved soil of the final product. As a result, it is possible to easily produce a granular improved soil having a desired average particle size.
【００１６】回分式撹拌混合槽（１）における滞留時間
は、含水土壌（Ａ）の土質および含水比により異なるた
め一概に決定し得ず、含水土壌（Ａ）に混入した石と土
壌との剥離状態や造粒された粒状土壌（Ｃ）の大きさ等
を観察して適宜決定する必要があるが、通常は２０秒以
上とするのが好ましい。滞留時間が余りにも短い場合
は、造粒が不完全となって石などの異物を含む大塊が形
成され、次工程で支障を来す。[0016] The residence time in the batch type mixing tank (1) cannot be determined unconditionally because it differs depending on the soil quality and the water content of the water-containing soil (A). It is necessary to observe and determine the condition, the size of the granulated soil (C), and the like as appropriate, but it is usually preferable to set the time to 20 seconds or longer. If the residence time is too short, granulation will be incomplete and large lumps containing foreign matter such as stones will be formed, which will hinder the next step.
【００１７】次いで、本発明においては、得られた粒状
土壌（Ｃ）を定量供給機（２）に供給して連続的に定量
排出する。定量供給機（２）としては、図１に示す様な
ベルトコンベア型定量供給機を使用するのがコスト的に
も有利であり且つ解体および組立の観点からも簡便であ
る。上記のベルトコンベア型定量供給機は、図２に示す
様に、ベルトコンベア（２１）の上部にホッパー（２
２）を配置し、当該ホッパーのベルトコンベア移送側の
下端にベルトコンベアで移送される粒状土壌（Ｃ）の量
を一定に制限するスリット部（切欠部）（２３）を設け
た構造を備えている。上記の定量供給機（２）におい
て、回分式撹拌混合槽（１）から間欠的に供給される粒
状土壌（Ｃ）は、連続的に次工程の篩分機兼用混合機
（３）に定量供給される。Next, in the present invention, the obtained granular soil (C) is supplied to a quantitative feeder (2) and is continuously discharged at a constant rate. As the metering device (2), it is advantageous in terms of cost to use a belt conveyor type metering device as shown in FIG. 1 and simple from the viewpoint of disassembly and assembly. As shown in FIG. 2, the above-mentioned belt-conveyor-type fixed-quantity feeder is provided with a hopper (2) above a belt conveyor (21).
2) is arranged, and a slit portion (notch portion) (23) is provided at the lower end of the hopper on the belt conveyor transfer side to limit the amount of the granular soil (C) transferred by the belt conveyor to a constant value. I have. In the above quantitative feeder (2), the granular soil (C) intermittently supplied from the batch-type stirring / mixing tank (1) is continuously and quantitatively supplied to the sieve / mixer (3) in the next step. You.
【００１８】次に、本発明においては、粒状土壌（Ｃ）
と固化剤粉末（Ｄ）とを回転円筒型の篩分機兼用混合機
（３）に連続的に定量供給して粒状土壌の表面に固化剤
粉末（Ｄ）を付着させると同時に篩分処理する。この
際、粒状土壌（Ｃ）の篩分機兼用混合機（３）への供給
に先立ち、必要に応じて磁選機（４）により金属異物
（Ｅ）を除去することが出来る。Next, in the present invention, the granular soil (C)
And the solidifying agent powder (D) are continuously and quantitatively supplied to a rotary cylindrical type sieve / mixer (3) so that the solidifying agent powder (D) is attached to the surface of the granular soil and sieved. At this time, before the granular soil (C) is supplied to the sieve / mixer (3), the metal foreign matter (E) can be removed by the magnetic separator (4) as necessary.
【００１９】本発明において、篩分機兼用混合機（３）
としては、図３に示す篩分機兼用混合機が好適に使用さ
れる。この篩分機兼用混合機は、金網で構成された回転
円筒体（３１）を内筒として備え且つ出口側周面（３２
ａ）が上記の金網より細めの金網で構成されている回転
円筒体（３２）を外筒として備えた構造を有する。そし
て、上記の篩分機兼用混合機（３）は、傾斜して配置さ
れ、その下端側が排出口として利用される。In the present invention, a sieve / mixer (3)
For this, a sieve / mixer as shown in FIG. 3 is preferably used. This mixing machine which also serves as a sieving machine is provided with a rotating cylindrical body (31) composed of a wire mesh as an inner cylinder and a peripheral surface on an outlet side (32).
a) has a structure in which a rotating cylindrical body (32) made of a wire mesh smaller than the above wire mesh is provided as an outer cylinder. Further, the above-mentioned sieve / mixer (3) is arranged in an inclined manner, and the lower end side is used as a discharge port.
【００２０】上記の篩分機兼用混合機（３）において、
定量供給機（２）から連続的に定量供給される粒状土壌
（Ｃ）は、固化剤粉末（Ｄ）と共に、図３に示す供給口
（３３）から供給され、転動処理により、その表面に固
化剤粉末（Ｄ）が付着させられ、下方側に移動しつつ篩
分処理される。すなわち、粒状土壌（Ｃ）に同伴された
石などの大塊（Ｆ）は、内筒を素通りしてその出口開放
端の回収口（３４）から連続的に排出され、内筒を通過
し且つ表面に固化剤粉末（Ｄ）を付着した粒状土壌
（Ｃ）は、外筒の出口開放端の回収口（３５）と金網に
て構成された回収口（３６）とから中粒（Ｇ）及び細粒
（Ｈ）の粒状改良土として連続的に排出される。In the above-mentioned sieve / mixer (3),
The granular soil (C) continuously and quantitatively supplied from the quantitative supply device (2) is supplied together with the solidifying agent powder (D) from the supply port (33) shown in FIG. The solidifying agent powder (D) is adhered and sieved while moving downward. That is, the large lumps (F) such as stones entrained in the granular soil (C) pass through the inner cylinder, are continuously discharged from the recovery port (34) at the open end of the outlet, pass through the inner cylinder, and The granular soil (C) having the solidifying agent powder (D) adhered to the surface thereof has a medium grain (G) and a medium grain (G) through a collection port (35) at the open end of the outer cylinder and a collection port (36) formed of a wire mesh. It is continuously discharged as a granular (H) granular improved soil.
【００２１】内筒は上記の様に石などの大塊を分離する
機能を有する。従って、内筒を構成する回転円筒体（３
１）の金網の目開きは、粒状土壌（Ｃ）を通過させるこ
とにより石などの大塊を分離し得る限り特に制限されな
いが、通常２０〜６０ｍｍ、好ましくは４０ｍｍ前後と
される。一方、外筒は、上記の様に、内筒を通過した粒
状土壌（Ｃ）の表面に固化剤粉末（Ｃ）を付着させると
共にその出口側周面（３２ａ）の金網により使用目的に
合せた粒度に篩分する機能を有する。従って、外筒の出
口側周面（３２ａ）を構成する金網の目開きは、目的と
する粒度に従って適宜選択されるが、その一例としては
１３ｍｍが挙げられる。また、金網で構成する出口側の
長さは、通常、外筒の全長の１／２〜１／４程度とされ
る。The inner cylinder has a function of separating large blocks such as stones as described above. Therefore, the rotating cylindrical body (3
The mesh size of the wire mesh of 1) is not particularly limited as long as large lumps such as stones can be separated by passing through the granular soil (C), but is usually 20 to 60 mm, preferably about 40 mm. On the other hand, as described above, the outer cylinder adheres the solidifying agent powder (C) to the surface of the granular soil (C) that has passed through the inner cylinder, and is adapted to the intended use by the wire mesh on the outlet side peripheral surface (32a). Has the function of sieving to particle size. Accordingly, the aperture of the wire mesh forming the outlet side peripheral surface (32a) of the outer cylinder is appropriately selected according to the target particle size, and an example thereof is 13 mm. In addition, the length of the outlet side formed of a wire net is usually about 1/2 to 1/4 of the entire length of the outer cylinder.
【００２２】上記の様な篩分機兼用混合機（３）は、粒
状土壌（Ｃ）に大きな負荷を掛けることなくその表面に
固化剤粉末（Ｄ）を付着させることが出来る。その結
果、粒状土壌（Ｃ）の表面が剥離されることなく、透水
性に優れ、浸出水が濁ることのない優れた性能の粒状改
良土（Ｇ）及び（Ｈ）が得られる。更に、上記の様な篩
分機兼用混合機（３）によれば、粒状土壌（Ｃ）と固化
剤粉末（Ｄ）との混合処理と同時に篩分された粒状改良
土（Ｇ）及び（Ｈ）が得られるため、別途の篩分機が不
要となる。なお、図３中、符号（３７）は回転軸に固設
され且つ駆動ベルト（図示せず）に係合する回転プーリ
ー、（３８）はローラである。The sieve / combiner (3) as described above can adhere the solidifying agent powder (D) to the surface of the granular soil (C) without applying a large load. As a result, it is possible to obtain granular improved soils (G) and (H) having excellent performance without exfoliation of the surface of the granular soil (C), excellent water permeability, and no haze of leachate. Furthermore, according to the above-mentioned mixer (3) which also serves as a sieving machine, the granular improved soils (G) and (H) sieved simultaneously with the mixing treatment of the granular soil (C) and the solidifying agent powder (D). , A separate sieving machine is not required. In FIG. 3, reference numeral (37) denotes a rotating pulley fixed to the rotating shaft and engages with a drive belt (not shown), and (38) denotes a roller.
【００２３】本発明において、固化剤粉末（Ｄ）は、粒
状土壌（Ｃ）の表面に均一に付着させるのが好ましく、
従って、斯かる観点から、平均粒径が１ｍｍ以下の粉末
を使用するのが好ましい。固化剤粉末（Ｄ）としては、
例えば、生石灰、消石灰、水硬性セメント、石灰系改良
材、セメント系改良材などが挙げられるが、脱水および
硬化反応の速い生石灰系の粉末が好適に使用される。固
化剤粉末（Ｄ）の添加量は、土壌に対し、通常０. ２〜
２０重量％、好ましくは０. ５〜１０重量％とされる。In the present invention, the solidifying agent powder (D) is preferably adhered uniformly to the surface of the granular soil (C).
Therefore, from such a viewpoint, it is preferable to use powder having an average particle size of 1 mm or less. As the solidifying agent powder (D),
For example, quick lime, slaked lime, hydraulic cement, lime-based improving material, cement-based improving material, and the like can be mentioned, and quick lime-based powder having a fast dehydration and hardening reaction is preferably used. The amount of the solidifying agent powder (D) added is usually 0.2 to 0.2
The content is 20% by weight, preferably 0.5 to 10% by weight.
【００２４】粒状改良土（Ｇ）及び（Ｈ）は、必要に応
じて更に篩分し、通常２〜３日、好ましくは６〜７日養
生した後に使用される。本発明における土壌の改良は、
軟弱または粘着性の高い土壌を埋め戻し等の工事に再利
用することが出来、その結果、地盤支持力を向上させる
ことが可能であり、しかも、砂の様な流動性のある土壌
に固化処理することを意味し、単に含水比の高い土壌を
塊状固化して流動性が失われた状態にすることを意味し
ない。本発明においては、含水土壌に対する添加物とし
て、山砂、高吸水性樹脂、石膏などを使用することによ
り、土壌の改良効果を調整することも出来る。The granular improved soils (G) and (H) are further sieved, if necessary, and usually used after curing for 2 to 3 days, preferably 6 to 7 days. Improvement of the soil in the present invention,
Soft or highly sticky soil can be reused for construction such as backfilling, and as a result, it is possible to improve the ground support capacity, and to solidify the soil with fluidity such as sand It does not simply mean that the soil with a high water content is solidified into a state where fluidity is lost. In the present invention, the effect of improving the soil can also be adjusted by using mountain sand, a superabsorbent resin, gypsum, or the like as an additive to hydrous soil.
【００２５】[0025]
【実施例】以下、実施例により本発明を更に詳細に説明
するが、本発明は、その要旨を超えない限り、以下の実
施例に限定されるものではない。なお、以下の諸例は、
回分式撹拌混合槽（１）として二軸撹拌混合槽、定量供
給機（２）としてベルトコンベア型定量供給機、篩分機
兼用混合機（４）として図３に示す篩分機兼用混合機を
備えた図１に示す製造工程によって行った。ただし、図
３に示す篩分機兼用混合機における回転円筒体（内筒）
（３１）の金網の目開きは４０ｍｍ、回転円筒体（外
筒）の出口側周面（３２ａ）の金網の目開きは１３ｍｍ
である。また、使用した水溶性重合体粉末は表１に示す
通りである。表１中の還元粘度は、重合体を１Ｎの食塩
水に０. １ｇ／ｄｌの濃度に溶解し、２５℃の状態でオ
ストワルド粘度計を使用して測定した値である。EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the scope of the present invention. The following examples are:
A twin-screw agitating / mixing tank was provided as the batch-type agitating / mixing tank (1), a belt-conveyor-type quantitative feeder was used as the quantitative feeder (2), and a sieve / mixer shown in FIG. 3 was used as the sieve / mixer (4). This was performed according to the manufacturing process shown in FIG. However, the rotating cylinder (inner cylinder) in the sieve / combiner shown in FIG.
The mesh size of the wire mesh of (31) is 40 mm, and the mesh size of the wire mesh on the outlet side peripheral surface (32a) of the rotating cylindrical body (outer cylinder) is 13 mm.
It is. The used water-soluble polymer powder is as shown in Table 1. The reduced viscosity in Table 1 is a value obtained by dissolving the polymer in a 1N saline solution to a concentration of 0.1 g / dl and measuring the temperature at 25 ° C. using an Ostwald viscometer.
【００２６】[0026]
【表１】 [Table 1]
【００２７】評価項目としては、目開き１３ｍｍの金網
（３２）にて構成された回収口（３７）から回収された
細粒（Ｈ）についての回収率（１３ｍｍ通過比率）、粒
度分布の測定による平均粒径、均等係数Ｕｃを採用し
た。また、細粒（Ｈ）の７日間養生後の室内ＣＢＲ試験
を「ＪＩＳ Ａ １２１１」に従って実施した。As evaluation items, the recovery rate (13 mm passage ratio) and the particle size distribution of the fine particles (H) recovered from the recovery port (37) constituted by the wire mesh (32) having a mesh size of 13 mm are measured. The average particle size and the uniformity coefficient Uc were employed. In addition, a laboratory CBR test of the fine grains (H) after curing for 7 days was performed according to “JIS A 1211”.
【００２８】実施例１〜６及び比較例１ 含水土壌（Ａ）として含水比９７％の関東ロームを使用
した。先ず、含水土壌（Ａ）と表２に示す各水溶性重合
体粉末（Ｂ）とを回分式撹拌混合槽（１）に供給して表
２に示す各混合時間（滞留時間）で処理することにより
粒状土壌（Ｃ）とした。次いで、定量供給機（２）に供
給して連続的に定量排出し、その流れから磁選機（４）
により金属異物を除去した後、回転円筒型の篩分機兼用
混合機（３）に連続的に定量供給すると共に土壌に対し
て３重量％相当の生石灰で処理した。Examples 1 to 6 and Comparative Example 1 Kanto loam having a water content of 97% was used as the water-containing soil (A). First, the water-containing soil (A) and each of the water-soluble polymer powders (B) shown in Table 2 are supplied to the batch-type stirring and mixing tank (1) and treated at each mixing time (residence time) shown in Table 2. Thus, a granular soil (C) was obtained. Next, it is supplied to the fixed quantity feeder (2) to continuously discharge the fixed quantity, and from the flow, the magnetic separator (4)
After the removal of metallic foreign substances, the mixture was continuously and quantitatively supplied to a rotary cylindrical type sieve / mixer (3) and treated with quicklime equivalent to 3% by weight of the soil.
【００２９】篩分機兼用混合機（３）の排出口（３４）
から石などの大塊を回収すると共に、（３５）及び（３
６）から、それぞれ、粒径１３〜４０ｍｍ、０〜１３ｍ
ｍの改良土を回収した。次いで、０〜１３ｍｍの改良土
を７日間養生後、ＣＢＲ試験に供した。結果を表２に示
す。なお、表２中の比較例１は、ブランク（無処理の土
壌）のＣＢＲ試験の結果である。The outlet (34) of the sieve / mixer (3)
Large lumps such as stones are collected from (35) and (3)
From 6), the particle size is 13 to 40 mm and 0 to 13 m, respectively.
m improved soil was recovered. Then, after the improved soil of 0 to 13 mm was cured for 7 days, it was subjected to a CBR test. Table 2 shows the results. In addition, Comparative Example 1 in Table 2 is a result of a CBR test of a blank (untreated soil).
【００３０】また、実施例１で得られた改良土につい
て、ＪＩＳ Ａ １２１８ 土の透水試験方法に従っ
て、室内透水試験を行なった。試験の種類は、定水位透
水試験とし、透水係数ｋを測定したところ、ｋ＝１．３
×１０-2ｃｍ／ｓｅｃであり、非常に透水性が良好であ
った。Further, the improved soil obtained in Example 1 was subjected to an indoor water permeability test according to JIS A1218 soil water permeability test method. The test type was a constant water level permeability test, and the permeability coefficient k was measured.
× 10 -2 cm / sec, and very good water permeability.
【００３１】比較例２ 実施例１において、篩分機兼用混合機（３）の代りに、
生石灰処理プラントで常用されている破砕式混合機と一
般の振動篩を順次並列的に配置して使用した以外は、実
施例１と同様に改良土の製造を行なったところ、粒径１
３ｍｍ以下の比率が８０％であり、平均粒径が０. ５ｍ
ｍ、均等係数Ｕc ＝２８と非常に粒度分布が広く、細粒
分３２％であった。得られた改良土を使用して実施例１
と同様に室内透水試験を行なったところ、透水係数ｋは
２. ８×１０-8ｃｍ／ｓｅｃであり、非常に透水性が悪
いことが分かった。Comparative Example 2 In Example 1, instead of the sieve / mixer (3),
An improved soil was produced in the same manner as in Example 1 except that a crushing mixer commonly used in a quick lime treatment plant and a general vibrating sieve were sequentially used in parallel.
The ratio of 3 mm or less is 80%, and the average particle size is 0.5 m.
m, the uniformity coefficient Uc = 28, and the particle size distribution was very wide, with a fine particle content of 32%. Example 1 using the improved soil obtained
An indoor water permeability test was conducted in the same manner as in the above. As a result, the water permeability coefficient k was 2.8 × 10 −8 cm / sec, and it was found that the water permeability was extremely poor.
【００３２】[0032]
【表２】 ──────────────────────────────────── 実施例 比較例 １ ２ ３ ４ ５ ６ １ 重合体種類 Ａ Ｂ Ｃ Ｄ Ａ Ａ − 重合体添加量（重量％） 0.1 0.1 0.2 0.3 0.1 0.1 − 回分式攪拌混合槽滞留時間（秒） 60 60 60 60 30 120 − 生石灰添加量（重量％） 3 3 3 3 3 3 − 13mm通過率（重量％) 90 92 90 88 83 93 − 平均粒径（ｍｍ） 1.5 1.5 1.8 1.8 2.2 1.1 − Ｕc 2.9 2.8 3.1 3.2 3.0 2.4 − ＣＢＲ（％） 21 20 18 20 18 22 1.2 ────────────────────────────────────Table 2 Example Comparative Example 1 2 3 4 5 6 1 Polymer type ABCDA A-Polymer addition amount (% by weight) 0.1 0.1 0.2 0.3 0.1 0.1-Batch stirring tank residence time (seconds) 60 60 60 60 30 120-Quick lime addition amount (% by weight) 3 3 3 3 3 3 - 13mm passage rate (wt%) 90 92 90 88 83 93 - average particle size (mm) 1.5 1.5 1.8 1.8 2.2 1.1 - U c 2.9 2.8 3.1 3.2 3.0 2.4 - CBR (%) 21 20 18 20 18 22 1.2 ────────────────────────────────────
【００３３】[0033]
【発明の効果】以上説明した本発明によれば、回分式撹
拌混合槽を使用することにより、粒度を自由に変えるこ
とが出来るため、従来の石灰改良土と比べ極めて多種の
用途に使用できる。また、本発明の製造方法は、装置が
コンパクト化されているため、従来の定地型プラントの
他、仮設移動型、車載型プラントへの利用も可能であ
る。しかも、本発明の製造方法は、回分式撹拌混合槽と
篩分機兼用混合機を利用したことにより、簡単に移設が
可能となり、特に、小型のプラントは、回分式撹拌混合
槽と定量供給機を組み合わせて車載型にし、回転円筒型
の篩分機兼用混合機を別の車載型とし、そして、現地で
ベルトコンベアで組み合わせることにより、短期の工事
で残土が発生する場合など、狭い敷地で簡便に残土処分
せずに粒状改良土にして再利用することが出来る。According to the present invention described above, the particle size can be freely changed by using a batch-type agitation mixing tank, so that it can be used in a very wide variety of applications as compared with conventional lime-improved soil. Further, since the manufacturing method of the present invention has a compact apparatus, it can be used not only for a conventional stationary plant but also for a temporary mobile plant or a vehicle-mounted plant. Moreover, the production method of the present invention makes it possible to easily relocate the apparatus by using a batch-type mixing tank and a sieve-mixer, and in particular, a small plant requires a batch-type mixing tank and a quantitative feeder. Combine it with the on-board type, use a rotating cylindrical type sieving / mixing machine as another on-board type, and combine it with a belt conveyor on-site, so that if the remaining soil is generated due to short-term construction, etc. It can be reused as granular improved soil without disposal.
【図１】本発明の製造方法の一例の工程説明図FIG. 1 is a process explanatory view of one example of a production method of the present invention.
【図２】本発明の製造工程で好適に使用されるベルトコ
ンベア型定量供給機の概略説明図FIG. 2 is a schematic explanatory view of a belt-conveyor-type quantitative feeder suitably used in the production process of the present invention.
【図３】本発明の製造工程で好適に使用される回転円筒
型の篩分機兼用混合機の一例の説明図FIG. 3 is an explanatory view of an example of a rotary cylindrical type sieve / mixer suitably used in the production process of the present invention.
Ａ：含水土壌 Ｂ：水溶性重合体粉末 Ｃ：粒状土壌 Ｄ：固化剤粉末 Ｅ：金属異物 Ｆ：大塊 Ｇ：粒状改良土（中粒） Ｈ：粒状改良土（細粒） １：回分式撹拌混合槽 １１：ホッパー １２：排出口 ２：定量供給機 ２１：ベルトコンベア ２２：ホッパー ２３：スリット部（切欠部） ３：回転円筒型の篩分機兼用混合機 ３１：回転円筒体（内筒） ３２：回転円筒体（外筒） ３２ａ：出口側周面 ３３：供給口 ３４：排出口 ３５：排出口 ３６：排出口 ４：磁選機 A: water-containing soil B: water-soluble polymer powder C: granular soil D: solidifying agent powder E: metallic foreign matter F: large lump G: granular improved soil (medium grain) H: granular improved soil (fine grain) 1: batch type Stirring and mixing tank 11: Hopper 12: Discharge port 2: Fixed amount feeder 21: Belt conveyor 22: Hopper 23: Slit part (notch part) 3: Rotary cylindrical type sieve / mixer 31: Rotating cylindrical body (inner cylinder) 32: rotating cylindrical body (outer cylinder) 32a: outlet side peripheral surface 33: supply port 34: discharge port 35: discharge port 36: discharge port 4: magnetic separator
Claims (4)
撹拌混合槽に供給して処理することにより粒状土壌とし
た後、得られた粒状土壌を定量供給機に供給して連続的
に定量排出し、その流れから必要に応じて金属異物を除
去し、次いで、粒状土壌と固化剤粉末とを回転円筒型の
篩分機兼用混合機に連続的に定量供給して粒状土壌の表
面に固化剤粉末を付着させると同時に篩分処理すること
を特徴とする粒状改良土の製造方法。Claims 1. A hydrous soil and a water-soluble polymer powder are supplied to a batch-type stirring and mixing tank to be processed into granular soil, and then the obtained granular soil is supplied to a quantitative feeder to be continuously supplied. Discharges quantitatively, removes metallic foreign matter from the flow if necessary, and then continuously supplies the granular soil and the solidifying agent powder to a rotary cylindrical type sieve / mixer to solidify on the surface of the granular soil A method for producing a granular improved soil, characterized in that a sieve treatment is carried out simultaneously with adhering a powder of an agent.
水溶性重合体粉末である請求項１に記載の製造方法。2. The method according to claim 1, wherein the water-soluble polymer powder is a carboxyl group-containing water-soluble polymer powder.
し、当該ホッパーのベルトコンベア移送側の下端にベル
トコンベアで移送される粒状土壌の量を一定に制限する
スリット部（切欠部）を設けた構造のベルトコンベア型
定量供給機を使用する請求項１又は２に記載の製造方
法。3. A structure in which a hopper is disposed above a belt conveyor, and a slit (notch) is provided at a lower end of the hopper on the belt conveyor transfer side to limit the amount of granular soil transferred by the belt conveyor to a constant value. The production method according to claim 1 or 2, wherein the belt conveyor type fixed quantity feeder is used.
て備え且つ出口側周面が上記の金網より細めの金網で構
成されている回転円筒体を外筒として備えている篩分機
兼用混合機を使用し、内筒で石などの大塊を分離し、内
筒を通過し且つ表面に固化剤粉末を付着した粒状土壌を
外筒で２つの粒状改良土に篩分する請求項１〜３の何れ
かに記載の製造方法。4. A sieving machine / mixer comprising, as an inner cylinder, a rotary cylinder made of a wire mesh and an outer cylinder, a rotary cylinder made of a wire mesh whose outlet side is thinner than the wire mesh. A large mass such as a stone is separated by an inner cylinder using a machine, and the granular soil having passed through the inner cylinder and having a solidifying agent powder adhered to the surface is sieved into two granular improved soils by an outer cylinder. 3. The production method according to any one of 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17862396A JP4126728B2 (en) | 1996-06-19 | 1996-06-19 | Method for producing granular improved soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17862396A JP4126728B2 (en) | 1996-06-19 | 1996-06-19 | Method for producing granular improved soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH101670A true JPH101670A (en) | 1998-01-06 |
| JP4126728B2 JP4126728B2 (en) | 2008-07-30 |
Family
ID=16051693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17862396A Expired - Fee Related JP4126728B2 (en) | 1996-06-19 | 1996-06-19 | Method for producing granular improved soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4126728B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001019956A (en) * | 1999-07-12 | 2001-01-23 | Okutama Kogyo Co Ltd | Lime-improved soil mortar, method for producing the same, and fluidization method using the same |
| JP2005281439A (en) * | 2004-03-29 | 2005-10-13 | Toyo Constr Co Ltd | Aggregate soil for improving bottom sediment, bottom sediment improvement method and submerged ground |
| JP2018127515A (en) * | 2017-02-07 | 2018-08-16 | 株式会社サンエコセンター | Modified soil and manufacturing method therefor |
-
1996
- 1996-06-19 JP JP17862396A patent/JP4126728B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001019956A (en) * | 1999-07-12 | 2001-01-23 | Okutama Kogyo Co Ltd | Lime-improved soil mortar, method for producing the same, and fluidization method using the same |
| JP2005281439A (en) * | 2004-03-29 | 2005-10-13 | Toyo Constr Co Ltd | Aggregate soil for improving bottom sediment, bottom sediment improvement method and submerged ground |
| JP2018127515A (en) * | 2017-02-07 | 2018-08-16 | 株式会社サンエコセンター | Modified soil and manufacturing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4126728B2 (en) | 2008-07-30 |
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