JPH1113049A - Improving method for organic soil ground - Google Patents

Improving method for organic soil ground

Info

Publication number
JPH1113049A
JPH1113049A JP16770297A JP16770297A JPH1113049A JP H1113049 A JPH1113049 A JP H1113049A JP 16770297 A JP16770297 A JP 16770297A JP 16770297 A JP16770297 A JP 16770297A JP H1113049 A JPH1113049 A JP H1113049A
Authority
JP
Japan
Prior art keywords
ground
casing
organic soil
organic
sand
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.)
Pending
Application number
JP16770297A
Other languages
Japanese (ja)
Inventor
Mamoru Ogishima
護 荻島
Hideaki Nakajima
秀晃 中島
Ryosuke Okumura
良介 奥村
Junji Hori
淳二 堀
Tomohiro Shimamura
友博 島村
Yukio Goto
幸雄 後藤
Katsuyoshi Sugimoto
勝義 杉本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takenaka Doboku Co Ltd
Original Assignee
Takenaka Doboku Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Takenaka Doboku Co Ltd filed Critical Takenaka Doboku Co Ltd
Priority to JP16770297A priority Critical patent/JPH1113049A/en
Publication of JPH1113049A publication Critical patent/JPH1113049A/en
Pending legal-status Critical Current

Links

Landscapes

  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

PROBLEM TO BE SOLVED: To use a universal stabilizer at a relatively low blending ratio by concurrently applying the substitution method to an aggregate and the mixing process method using the normal stabilizer for the soft organic soil ground. SOLUTION: A casing type excavator 3 is installed on a sand mat 2 prepared on the surface of the organic soil ground, the ground soil is excavated and removed, a casing 4 is driven at least to the depth penetrating an organic soil layer 1, and only the excavator 3 is lifted. The casing 4 is driven into the ground 10 deeper by about 50 cm after penetrating the organic soil layer 1, for example. Sea sand or mountain sand 5 serving as an aggregate is inserted into the cavity of the casing 4, the insertion is stopped when the mountain sand 5 is filled in the cavity of the casing 4 nearly to the ground level, then the casing 4 is extracted. The substitution work between the organic soil 1 and the mountain sand 5 is completed for the soft ground at this portion by these processes.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明が属する技術分野】この発明は、枯れ葉、枯れ枝
などが堆積し堆肥状になった軟弱地盤、即ち、有機物を
多量に含み、含水比が極端に高く、骨材分が非常に少な
い、所謂有機質土層が表層をかなり深く覆っている有機
質土地盤を、安定材を使用した混合処理工法により強度
を発現させる地盤改良工法の技術分野に属し、更に言え
ば、砂置換工法と混合処理工法とを併用して行う軟弱地
盤改良工法に関する。
The present invention relates to a soft ground in which dead leaves, dead branches and the like are deposited and composted, that is, contains a large amount of organic matter, has an extremely high water content, and has a very small amount of aggregate. It belongs to the technical field of soil improvement method to develop the strength of the organic soil where the organic soil layer covers the surface layer considerably deeply by the mixing processing method using stabilizers, and more specifically, the sand replacement method and the mixing processing method. The present invention relates to a soft ground improvement method that is carried out in combination with the above.

【0002】[0002]

【従来の技術】現在でも、地域によっては有機質土が表
層をかなり深く覆った軟弱地盤が存在する。有機質土層
は、上記したように有機物を多量に含み、含水比が極端
に高く、骨材分が非常に少ないため、そのままでは建造
物の支持に強度が不足することは勿論のこと、必要な強
度を発現させる手段として、有機質土用セメント系固化
剤を使用した混合処理工法による地盤改良工法を実施し
ても、例えば図7に一軸圧縮強度の試験結果を示したよ
うに殆ど強度が向上しないことが知られている。因み
に、図7中の点線aは有機質土用セメント系固化剤の配
合割合が300kg/m3、350kg/m3における材齢7日
目の強度を示し、実線bは同セメント系固化剤の配合割
合が300kg/m3、350kg/m3における材齢28日目
の強度を示している。いずれも目標強度である4.34
kg・f/cm2、及び7.23kg・f/cm2(図8を参照)を
大幅に下回っている。参考のために、図8には同じ条件
で粘性土地盤を改良した場合の一軸圧縮強度の試験結果
を示した。図8中の点線cは普通ポルトランドセメント
系固化剤の配合割合が300kg/m3、及び350kg/
m3、400kg/m3における材齢7日目の強度を示し、実
線dは同セメント系固化剤の配合割合が300kg/m3
及び350kg/m3、400kg/m3における材齢28日目
の強度を示している。いずれも目標強度である4.34
kg・f/cm2、及び7.23kg・f/cm2を大幅に上回って
いることが明らかである。
2. Description of the Related Art Even now, in some areas, there is a soft ground in which organic soil covers a surface layer considerably deeply. As described above, the organic soil layer contains a large amount of organic matter, has an extremely high water content, and has a very small amount of aggregate. As a means for developing strength, even if a soil improvement method by a mixing method using an organic soil cement-based solidifying agent is performed, the strength hardly improves, for example, as shown in the test results of uniaxial compressive strength in FIG. It is known. Incidentally, a dotted line a in FIG. 7 the blending ratio of the organic dog days cement solidifying agent indicates a strength at the age of 7 days at 300kg / m 3, 350kg / m 3, the solid line b is the formulation of the cement solidifying agent The strength at the age of 28 days when the ratio is 300 kg / m 3 and 350 kg / m 3 is shown. In each case, the target strength is 4.34.
kg · f / cm 2, and 7.23kg · f / cm 2 (see FIG. 8) are significantly below. For reference, FIG. 8 shows the test results of the unconfined compressive strength when the viscous ground was improved under the same conditions. The dotted line c in FIG. 8 indicates that the compounding ratio of the ordinary Portland cement-based solidifying agent is 300 kg / m 3 and 350 kg /
The strength at the age of 7 days at m 3 and 400 kg / m 3 is shown. The solid line d shows that the compounding ratio of the cement-based solidifying agent is 300 kg / m 3 ,
And the strength at the age of 28 days at 350 kg / m 3 and 400 kg / m 3 . In each case, the target strength is 4.34.
It is evident that exceeds kg · f / cm 2, and 7.23kg · f / cm 2 significantly.

【0003】なお、図7の試験結果は、高価な有機質土
用セメント系固化剤(例えば、宇部興産のUKCーA)
を使用した結果であり、図8は普通ポルトランドセメン
トを使用した結果であることを参照されたい。有機質土
用セメント系固化剤は、普通ポルトランドセメントに比
してかなり高価である。しかも有機質土用セメント系固
化剤をかなり大量に(300〜400kg/m3配合)使用
してもさして効果がない結果を図7が示している。要す
るに、有機質土はセメント系固化剤で凝結させ強度を発
現させることは不可能とさえ考えるほかない結果を示し
ている。
[0003] The test results shown in FIG. 7 indicate that an expensive cementitious solidifying agent for organic soil (eg, UKC-A manufactured by Ube Industries)
, And FIG. 8 is a result using ordinary Portland cement. Organic soil cement-based solidifying agents are considerably more expensive than ordinary Portland cement. Moreover, FIG. 7 shows a result that even if a cement-based solidifying agent for organic soil is used in a considerably large amount (300 to 400 kg / m 3 ), it is not effective. In short, the results show that it is impossible to consolidate the organic soil with the cement-based solidifying agent to develop the strength.

【0004】そこで従来は、上述のような事情に鑑み
て、有機質土層が比較的浅い場合(例えば深度が2m位
まで)は、ブルドーザ等を使用して有機質土層を削り取
り、その跡へ、地盤改良工法によって強度を発現する土
質材料(砂、粘土質土等)を埋め戻す置換工法が多く実
施されている。
Therefore, conventionally, in consideration of the above-mentioned situation, when the organic soil layer is relatively shallow (for example, up to a depth of about 2 m), the organic soil layer is scraped off using a bulldozer or the like, Many replacement methods for backfilling soil materials (sand, clay soil, etc.) that exhibit strength by the ground improvement method have been implemented.

【0005】[0005]

【本発明が解決しようとする課題】従来の上記置換工法
は、有機質土層が浅い場合は有効的である。しかし、4
m以上も深くなると、置換工事そのものの実施が大掛か
りになり過ぎ、工期や工費の面からその実施が困難視さ
れる。例えば埋め戻し土の確保の困難性、そして、削り
取った有機質土が全て建設残土となり、その処分が困難
になる。
The conventional replacement method is effective when the organic soil layer is shallow. But 4
When the depth is more than m, the replacement work itself becomes too large, and it is considered difficult to perform the replacement work in terms of the construction period and construction cost. For example, it is difficult to secure backfill soil, and all the organic soil that has been shaved off becomes construction residual soil, which makes disposal difficult.

【0006】従って、本発明の目的は、有機質土層が比
較的深く覆っている軟弱な有機質土地盤について、海
砂、山砂のような骨材料への置換工法と、通常の安定材
を使用する混合処理工法とを併用して行う軟弱地盤改良
工法を提供することである。本発明の更なる目的は、安
価な普通ポルトランドセメント・高炉セメントのような
汎用の安定材を比較的少ない配合割合で使用して実施で
き、また、有機質土層の骨材料への置換も体積比でおよ
そ50%程度の置換で済み、改良工事が容易な、有機質
土地盤の改良工法を提供することである。
[0006] Accordingly, an object of the present invention is to replace a soft organic soil ground covered with an organic soil layer with a relatively deep layer with a bone material such as sea sand or mountain sand and to use a usual stabilizer. It is an object of the present invention to provide a soft ground improvement method that is performed in combination with a mixed processing method. A further object of the present invention is to use a general-purpose stabilizer such as inexpensive ordinary Portland cement or blast furnace cement in a relatively small mixing ratio, and to replace the organic soil layer with bone material by volume ratio. It is an object of the present invention to provide a method for improving the organic ground, which can be replaced by about 50%, and the improvement work is easy.

【0007】[0007]

【課題を解決するための手段】上記の課題を解決するた
めの手段として、請求項1記載の発明に係る有機質土地
盤の改良工法は、有機質土層が地盤の表層を覆っている
軟弱な有機質土地盤の表面に、施工機械類を設備可能な
強度のサンドマットの如き支持体を用意する段階と、用
意した支持体の上に掘削機を据え付け、地盤土壌を掘削
排土しケーシングを少なくとも有機質土層を貫通する深
さまで打設する段階と、打設したケーシングの空洞の中
へ骨材料を投入し、その後ケーシングを引き抜く段階
と、前記のようにして骨材料との置換が終了した地盤に
ついて、地盤改良機により安定材を使用した混合処理工
法よる改良処理を行う段階とより成ることを特徴とす
る。
According to a first aspect of the present invention, there is provided a method for improving an organic soil layer, wherein the organic soil layer covers a surface layer of the ground. Preparing a support such as a sand mat of sufficient strength to allow construction machinery to be installed on the surface of the ground, installing an excavator on the prepared support, excavating and discharging the soil, Casting to the depth that penetrates the soil layer, charging the bone material into the cavity of the cast casing, then pulling out the casing, and replacing the ground with the bone material as described above And performing an improvement treatment by a mixing treatment method using a stabilizer by a ground improvement machine.

【0008】[0008]

【発明の実施の形態】請求項1記載の発明に係る有機質
土層1が地盤10の表層を3m乃至4m以上もかなり深
く覆っている有機質土地盤の改良工法を実施するに際し
ては、先ず図1以下に示しているように、有機質土地盤
の表面に、施工機械類を設備可能な強度の支持体として
例えばサンドマット2を用意する。前記のサンドマット
2は、厚さにして1m位積まれる。前記したように地表
面が軟弱で、大重量の施工機械を安定な運転(稼働)状
態に据え付けるためである。従って、支持体としてはシ
ートパイルや鋼板類を敷き詰めても良い。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When an organic soil layer 1 according to the first aspect of the present invention covers a surface layer of a ground 10 considerably deeper than 3 m to 4 m or more, first of all, when implementing a method of improving an organic ground, FIG. As shown below, for example, a sand mat 2 is prepared on the surface of the organic ground as a support having a strength capable of installing construction machines. The above-mentioned sand mat 2 is piled up about 1 m in thickness. As described above, the ground surface is soft, and the heavy construction machine is to be installed in a stable operation (operation) state. Therefore, a sheet pile or a steel plate may be spread as a support.

【0009】次に、前記のように用意したサンドマット
2の上にケーシング式掘削機3を据え付け、地盤土壌の
掘削排土と共にケーシング4を少なくとも有機質土層1
を貫通する深さまで打設し、その後掘削機(掘削軸3
a)のみ引き上げる。前記のケーシング式掘削機3とし
ては、具体的にはケミカルパイル打設機、サンドドレー
ン施工機などを好適に使用できる。或いはオーガー掘削
機を据え付けてまず孔の掘削排土を行い、つづいてその
孔へケーシング4を圧入する方法で施工することもでき
る。
Next, a casing type excavator 3 is installed on the sand mat 2 prepared as described above, and the casing 4 is excavated and discharged from the ground soil and at least the organic soil layer 1 is removed.
And then excavator (excavation shaft 3
Only a) is raised. As the casing type excavator 3, specifically, a chemical pile driving machine, a sand drain construction machine, or the like can be suitably used. Alternatively, it is also possible to install the auger excavator, first excavate and excavate the hole, and then press-fit the casing 4 into the hole.

【0010】前記のようにして打設するケーシング4
は、例えば有機質土層1を貫通してさらに50cm程度深
く地盤10の中へ打設した状態とする(図1の点線図示
及び図2参照)。その後前記ケーシング4の空洞の中
へ、図2のように、骨材料としての海砂又は山砂5を、
例えば建設現場には必ず有るコンクリートバケット6を
使用するなどして投入する。ケーシング4内の空洞がお
よそ地面レベルまで山砂5で充填された段階で投入を止
め、その後ケーシング4は引き抜く(図3)。
The casing 4 to be cast as described above.
Is, for example, penetrated through the organic soil layer 1 and is driven into the ground 10 by about 50 cm deeper (see the dotted line in FIG. 1 and FIG. 2). Then, as shown in FIG. 2, sea sand or mountain sand 5 as a bone material is introduced into the cavity of the casing 4.
For example, a concrete bucket 6 which is always provided at a construction site is used and put. The charging is stopped when the cavity in the casing 4 is filled with the mountain sand 5 to approximately the ground level, and then the casing 4 is pulled out (FIG. 3).

【0011】以上の工程により、当該部位の軟弱地盤に
ついて有機質土1と山砂5との置換作業が終了する。以
下、同様にして、工事区域の地盤について、一定のピッ
チで前述の置換作業を次々進めて行く(図4)。前記の
置換はおよそ50%程度まで行えば良く、従って、ラッ
プ施工までは必要ない。前記のように50%程度の置換
で済ませられるので、排除した有機質土が建設残土とし
て発生する量もそれなりに低減する。骨材料には、前記
砂の他に、通常の土壌(粘性土を含む)を使用できる。
Through the above steps, the replacement work of the organic soil 1 and the mountain sand 5 on the soft ground at the site is completed. Hereinafter, similarly, the above-described replacement work is sequentially performed on the ground in the construction area at a constant pitch (FIG. 4). The above replacement may be performed up to about 50%, and therefore does not need to be performed until wrapping. Since the replacement is performed by about 50% as described above, the amount of the removed organic soil generated as construction residual soil is reduced accordingly. As the bone material, in addition to the sand, ordinary soil (including cohesive soil) can be used.

【0012】前記のようにして有機質土1と骨材料5と
の置換が終了した軟弱地盤については、詳しく図示する
ことを省略した地盤改良機7をやはりサンドマット2の
上に据え付け、該地盤改良機7により安価な普通ポルト
ランドセメント系固化剤を安定材に使用した混合処理工
法により公知の地盤改良処理を設計深さまで行う。この
場合の地盤改良は、通例のようにラップ施工を行い、も
って骨材料との置換効果を実効あらしめる安定材(普通
ポルトランドセメント系固化剤)の配合割合は、350
kg/m3程度である。
For the soft ground in which the replacement of the organic soil 1 with the bone material 5 has been completed as described above, a ground improvement machine 7, not shown in detail, is also installed on the sand mat 2, and the ground improvement is performed. The known ground improvement treatment is performed to the design depth by the mixing process using the inexpensive ordinary Portland cement-based solidifying agent as a stabilizer. In this case, the ground improvement is performed by lapping as usual, and the compounding ratio of the stabilizer (normal Portland cement-based solidifying agent) that effectively achieves the effect of replacing the bone material is 350.
It is about kg / m 3 .

【0013】因みに、骨材料として海砂と山砂とを1:
1の割合で混合し、これを重量比にして60%置換した
有機質土地盤に、水ーセメント比80%の普通ポルトラ
ンドセメント系固化剤を350kg/m3の割合で注入し混
合処理した改良地盤の一軸圧縮強度の試験結果を図6に
示した。図6によれば材齢7日目の強度は12kg・f/c
m2で、目標強度の4.34kg・f/cm2を十分にクリヤー
している。また、材齢28日目の強度は14.25kg・
f/cm2で、やはり目標強度の7.23kg・f/cm2をはる
かにクリヤーしており、本発明の改良工法が十分実用に
供し得ることが明らかである。
By the way, sea sand and mountain sand are used as bone materials:
1 was mixed, and this was replaced with 60% by weight of an organic ground, into which an ordinary Portland cement-based solidifying agent having a water-to-cement ratio of 80% was injected at a rate of 350 kg / m 3 and mixed and treated. FIG. 6 shows the test results of the uniaxial compressive strength. According to FIG. 6, the strength at the age of 7 days is 12 kg · f / c.
With m 2 , the target strength of 4.34 kg · f / cm 2 is sufficiently cleared. The strength at the age of 28 days is 14.25kg.
At f / cm 2 , the target strength of 7.23 kg · f / cm 2 was also far cleared, and it is clear that the improved method of the present invention can be sufficiently put to practical use.

【0014】[0014]

【本発明が奏する効果】本発明に係る有機質土地盤の改
良工法は、通常の置換工法では工期、経済性ともに不満
な、有機質土層がかなり深い、軟弱な有機質土地盤の改
良工法として、経済的に、既往の慣用技術の組み合わせ
により容易に、能率良く実施できて、地盤改良の目的を
十分に達成出来るのである。
[Effects of the present invention] The improvement method of organic soil according to the present invention is an economical method for improving soft organic soil, which is unsatisfactory in terms of both construction period and economic efficiency with the ordinary replacement method, and has a considerably deep organic soil layer. In addition, it can be easily and efficiently implemented by the combination of the conventional techniques, and the purpose of the ground improvement can be sufficiently achieved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の改良工法としてケーシング式掘削機に
よる地盤の掘削排土の段階を示す立面図である。
FIG. 1 is an elevation view showing a stage of excavation and discharge of ground by a casing type excavator as an improved construction method of the present invention.

【図2】ケーシングへ骨材料の投入置換の段階を示した
立面図である。
FIG. 2 is an elevational view showing a stage of charging and replacing bone material into a casing.

【図3】ケーシングの引き抜き段階を示す立面図であ
る。
FIG. 3 is an elevational view showing a stage of pulling out a casing.

【図4】置換を終えた地盤の状況を示す断面図である。FIG. 4 is a cross-sectional view showing the situation of the ground after the replacement.

【図5】地盤改良の施工図である。FIG. 5 is a construction drawing of ground improvement.

【図6】本発明の方法で改良した地盤の一軸圧縮試験の
結果を示すグラフである。
FIG. 6 is a graph showing the results of a uniaxial compression test of ground improved by the method of the present invention.

【図7】有機質土地盤の改良地盤の一軸圧縮試験の結果
を示すグラフである。
FIG. 7 is a graph showing the results of a uniaxial compression test of improved ground of organic ground.

【図8】粘性土地盤の改良地盤の一軸圧縮試験の結果を
示すグラフである。
FIG. 8 is a graph showing the results of a uniaxial compression test of improved ground of cohesive ground.

【符号の説明】[Explanation of symbols]

1 有機質土層 2 サンドマット 3 ケーシング式掘削機 4 ケーシング 3a 掘削機 7 地盤改良機 DESCRIPTION OF SYMBOLS 1 Organic soil layer 2 Sand mat 3 Casing type excavator 4 Casing 3a Excavator 7 Ground improvement machine

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【手続補正書】[Procedure amendment]

【提出日】平成9年6月25日[Submission date] June 25, 1997

【手続補正1】[Procedure amendment 1]

【補正対象書類名】図面[Document name to be amended] Drawing

【補正対象項目名】図7[Correction target item name] Fig. 7

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【図7】 FIG. 7

フロントページの続き (72)発明者 堀 淳二 東京都中央区銀座八丁目21番1号 株式会 社竹中土木内 (72)発明者 島村 友博 福岡県福岡市中央区天神四丁目2番20号 株式会社竹中土木九州支店内 (72)発明者 後藤 幸雄 福岡県福岡市中央区天神四丁目2番20号 株式会社竹中土木九州支店内 (72)発明者 杉本 勝義 愛知県名古屋市中区錦一丁目18番22号 株 式会社竹中土木名古屋支店内Continued on the front page (72) Inventor Junji Hori 8-21-1, Ginza, Chuo-ku, Tokyo Co., Ltd. Takenaka Civil Engineering Co., Ltd. (72) Tomohiro Shimamura 4-2-2, Tenjin, Chuo-ku, Fukuoka City, Fukuoka Prefecture Inside Takenaka Civil Engineering Kyushu Branch (72) Inventor Yukio Goto 4-20-20 Tenjin, Chuo-ku, Fukuoka City, Fukuoka Prefecture Inside Takenaka Civil Engineering Kyushu Branch (72) Inventor Katsuyoshi Sugimoto 1-18-18 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture No. 22 Inside Takenaka Civil Engineering Nagoya Branch

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 有機質土層が地盤の表層を覆っている有
機質土地盤の表面に、施工機械類を設備可能な強度のサ
ンドマットの如き支持体を用意する段階と、 用意した支持体の上に掘削機を据え付け、地盤土壌を掘
削排土しケーシングを少なくとも有機質土層を貫通する
深さまで打設する段階と、 打設したケーシングの空洞の中へ骨材料を投入し、その
後ケーシングを引き抜く段階と、 前記のようにして骨材料との置換が終了した地盤につい
て、地盤改良機により安定材を使用した混合処理工法よ
る改良処理を行う段階とより成ることを特徴とする、有
機質土地盤の改良工法。
1. A step of preparing a support such as a sand mat having a strength capable of installing construction machinery on a surface of an organic ground in which an organic soil layer covers a surface layer of the ground; Excavator, excavating and discharging the ground soil and placing the casing at least to a depth that penetrates the organic soil layer; charging bone material into the cavity of the placed casing, and then withdrawing the casing And the step of performing an improvement treatment by a mixed treatment method using a stabilizing material by a soil improvement machine on the ground on which the replacement with the bone material has been completed as described above, Construction method.
JP16770297A 1997-06-24 1997-06-24 Improving method for organic soil ground Pending JPH1113049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16770297A JPH1113049A (en) 1997-06-24 1997-06-24 Improving method for organic soil ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16770297A JPH1113049A (en) 1997-06-24 1997-06-24 Improving method for organic soil ground

Publications (1)

Publication Number Publication Date
JPH1113049A true JPH1113049A (en) 1999-01-19

Family

ID=15854638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16770297A Pending JPH1113049A (en) 1997-06-24 1997-06-24 Improving method for organic soil ground

Country Status (1)

Country Link
JP (1) JPH1113049A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002099091A2 (en) 2001-06-06 2002-12-12 Novozymes A/S Endo-beta-1,4-glucanase from bacillus
JP2017089319A (en) * 2015-11-16 2017-05-25 鹿島建設株式会社 Vertical shaft construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002099091A2 (en) 2001-06-06 2002-12-12 Novozymes A/S Endo-beta-1,4-glucanase from bacillus
JP2017089319A (en) * 2015-11-16 2017-05-25 鹿島建設株式会社 Vertical shaft construction method

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