JPH0457805B2 - - Google Patents
Info
- Publication number
- JPH0457805B2 JPH0457805B2 JP60207343A JP20734385A JPH0457805B2 JP H0457805 B2 JPH0457805 B2 JP H0457805B2 JP 60207343 A JP60207343 A JP 60207343A JP 20734385 A JP20734385 A JP 20734385A JP H0457805 B2 JPH0457805 B2 JP H0457805B2
- Authority
- JP
- Japan
- Prior art keywords
- soil
- ground
- amount
- stirring
- hardening material
- 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.)
- Expired - Lifetime
Links
- 239000002689 soil Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
（発明が属する技術分野）
本発明は粉粒状若しくはスラリー状の地盤硬化
材（セメント、セメントミルク等）の攪拌混合に
よつて軟弱地盤を硬化処理する工法に関するもの
である。[Detailed description of the invention] (Technical field to which the invention pertains) The present invention relates to a method of hardening soft ground by stirring and mixing a ground hardening material (cement, cement milk, etc.) in the form of powder or slurry. .
（発明の課題とその特徴点）
地盤硬化材の攪拌混合によつて軟弱地盤を硬化
処理する場合の１つの問題点は、原地盤の性状に
よつては地盤土壌に対する体積比で数10％にも及
ぶ大量の地盤硬化材の混入により、地盤が盛上が
つたり、地盤が側方に拡がつて周辺の既設構造物
に悪影響を与えることである。(Problem to be solved by the invention and its characteristics) One problem when hardening soft ground by stirring and mixing a ground hardening agent is that depending on the properties of the original ground, the volume ratio of the ground hardening material to the ground soil can be several tens of percent. The mixing of a large amount of soil hardening material, which can reach up to 100 yen, causes the ground to swell and spread laterally, negatively impacting existing structures in the surrounding area.
本発明は前述の問題点の解決を図つたものであ
つて、その構成上の特徴は特許請求の範囲に記載
したとおりである。 The present invention aims to solve the above-mentioned problems, and its structural features are as described in the claims.
すなわち、本発明は、地盤硬化材の攪拌混合に
よつて軟弱地盤を硬化処理する際に、地盤硬化材
の攪拌混合に先立つて地盤硬化材の使用量に対応
する量の原地盤土壌を排除することにより、地盤
硬化材の添加混入による処理地盤の体積増加を防
ぐようにしたものである。 That is, the present invention, when hardening soft ground by stirring and mixing a soil hardening material, removes an amount of the original soil corresponding to the amount of the soil hardening material used prior to stirring and mixing the soil hardening material. This prevents the volume of the treated ground from increasing due to the addition of the ground hardening agent.
本発明は、地盤硬化材の攪拌混合によつて軟弱
地盤を硬化処理するタイプの軟弱地盤改良工法の
全般に亘つて、攪拌混合手段、処理態様等の如何
を問わずに適用されるものであつて、例えば、下
端部に攪拌翼を装着した回転軸の昇降によつてパ
イル状の硬化処理部を所定ピツチで形成する場
合、攪拌混合手段を水平方向に移動させて地盤を
全体的に硬化処理する場合、これらの場合におい
て各地点の原地盤の性状に応じて地盤硬化材の混
合量を変化させる場合等の種々の場合が考えられ
るが、排土はこれらの場合にそれぞれ適合する任
意の態様で行えばよい。 The present invention is applicable to all types of soft ground improvement methods in which soft ground is hardened by stirring and mixing a ground hardening material, regardless of the stirring and mixing means, treatment mode, etc. For example, when a pile-shaped hardened area is formed at a predetermined pitch by raising and lowering a rotary shaft with a stirring blade attached to the lower end, the stirring and mixing means is moved horizontally to harden the entire ground. In these cases, various cases may be considered, such as changing the amount of soil hardening material mixed depending on the properties of the original ground at each location, but soil removal may be carried out in any manner that is suitable for each of these cases. You can do it with
（図面による発明の具体的説明）
第１図〜第３図に本発明によつてなされる地盤
改良の３つの場合が例示されているが、本発明は
これらに限定されない。(Specific Description of the Invention with Drawings) Although three cases of ground improvement performed by the present invention are illustrated in FIGS. 1 to 3, the present invention is not limited thereto.
第１図の場合は、区域Ａ内の地盤中にパイル状
若しくは壁状の攪拌混合処理部１を所定ピツチで
多数施工して、区域Ａ内に攪拌混合処理部１と非
処理部２が共存する形で地盤改良がなされてい
る。この場合の攪拌混合処理部１に混入されてい
る地盤硬化材の量Q1は深さＺ方向に一定であり、
これに対応して地盤土壌の排除量Q2も深さＺ方
向に一定である。 In the case of Fig. 1, a large number of pile-shaped or wall-shaped stirring and mixing treated sections 1 are constructed in the ground in area A at a predetermined pitch, so that stirring and mixing treated sections 1 and non-treated sections 2 coexist in area A. Ground improvement is being carried out in this way. In this case, the amount Q 1 of the soil hardening material mixed in the stirring and mixing processing section 1 is constant in the depth Z direction,
Correspondingly, the removal amount Q2 of the ground soil is also constant in the depth Z direction.
第２図の場合は、区域Ａの下層部４は第１図の
場合と同じ態様で処理されているが、上層部３は
全体的に攪拌混合処理されている。そして、この
場合の地盤硬化材の混入量Q1は、上層部３にお
いて多く、下層部４において少ないため、これに
対応して地盤土壌の排除量Q2も、上層部３にお
いて多く、下層部４において少なくなつている。 In the case of FIG. 2, the lower layer 4 of area A has been treated in the same manner as in FIG. 1, but the upper layer 3 has been completely stirred and mixed. In this case, the amount of ground hardening material mixed in Q 1 is large in the upper layer 3 and smaller in the lower layer 4, and correspondingly, the amount of ground soil removed Q 2 is also large in the upper layer 3 and smaller in the lower layer. 4, it is decreasing.
第３図の場合は、区域Ａ全体を攪拌混合処理し
ているが、その際、深さＺ方向の原地盤強度Ｓの
変化に応じて地盤硬化材の混入量Q1を変化させ
て、区域Ａ内の地盤が均等の改良強度になるよう
にしている。したがつてこの場合は、この地盤硬
化材の混入量Q1の変化に対応して地盤土壌の排
除量Q2を変化させている。 In the case of Fig. 3, the entire area A is stirred and mixed, but at that time, the amount Q 1 of the ground hardening material mixed is changed according to the change in the original ground strength S in the depth Z direction, and the area The ground within A is made to have uniform improved strength. Therefore, in this case, the removal amount Q 2 of the ground soil is changed in response to the change in the amount Q 1 of the soil hardening agent mixed in.
つぎに、第４図〜第８図により本発明実施用の
装置について説明する。 Next, an apparatus for implementing the present invention will be explained with reference to FIGS. 4 to 8.
第４図に示す装置では、図示しない施工機本体
にワイヤＷで吊下げられた駆動部５から下向きに
延びる回転軸６の下端に攪拌翼７が突設され、
又、回転軸６の外周には排土用スクリユー８が取
付けられており、装置の下降時に排土用スクリユ
ー８によつて設計上決められている地盤硬化材の
混入量に対応する量の排土を行い、装置の上昇時
に攪拌翼７により回転軸６の内部空間を通して送
られた地盤硬化材と地盤土壌との攪拌混合を行う
ようになつている。 In the apparatus shown in FIG. 4, a stirring blade 7 is provided protruding from the lower end of a rotating shaft 6 extending downward from a drive unit 5 suspended by a wire W from a construction machine body (not shown).
Also, an earth removal screw 8 is attached to the outer periphery of the rotating shaft 6, and when the device is lowered, the earth removal screw 8 removes an amount corresponding to the amount of soil hardening material mixed in as determined by the design. The soil is stirred and mixed with the ground hardening material sent through the internal space of the rotary shaft 6 by the stirring blades 7 when the device is raised.
なお、一般にスクリユーオーガーの排土量Ｑは
スクリユーの有効排土面積をａ、ピツチをｐ、単
位時間の回転数をｎ、作動時間をｔとすると、Ｑ
＝ａ×ｐ×ｎ×ｔであるから、ａ，ｐ，ｎ，ｔの
何れかを変化させるとＱが変化する。 In general, the amount of soil removed by a screw auger, Q, is determined by
=a×p×n×t, so if any one of a, p, n, and t is changed, Q changes.
第５図に示す装置は、地盤硬化材供給管９を別
に設けている点が第４図の装置と相違している。 The apparatus shown in FIG. 5 differs from the apparatus shown in FIG. 4 in that a soil hardening material supply pipe 9 is provided separately.
第６図に示す装置は、排土用スクリユー８を地
盤硬化材供給管の外周に取付けた点が第５図の装
置と相違している。 The apparatus shown in FIG. 6 differs from the apparatus shown in FIG. 5 in that the soil removal screw 8 is attached to the outer periphery of the soil hardening material supply pipe.
第７図に示す装置は、水平方向に移動させなが
ら所定深度間を一度に攪拌混合処理するタイプの
ものであつて、多段状に攪拌翼１０を突設した回
転軸１１の移動方向前方に排土手段１２が設けら
れている。 The device shown in FIG. 7 is of a type that stirs and mixes a predetermined depth at once while moving in the horizontal direction, and is discharged in the forward direction of the movement of a rotary shaft 11 on which stirring blades 10 are protruded in multiple stages. A soil means 12 is provided.
第８図に示す排土手段は部分的に排土量を変化
させる場合のものであつて、先端部外周にスクリ
ユー１３を取付けた回転軸１４をパイプ１５内に
スクリユー１３がパイプ１５の下端から所定長さ
突出する状態で挿設し、回転軸１４の回転数を変
えることによつて排土量を変化させるようになつ
ており、パイプ１５内に取込まれた土壌は空気管
１６を通して送られた空気で補助されてパイプ１
５内を上昇する。 The soil removal means shown in FIG. 8 is for partially changing the amount of soil discharged, and a rotary shaft 14 with a screw 13 attached to the outer periphery of the tip is inserted into the pipe 15 so that the screw 13 is inserted from the lower end of the pipe 15. The soil is inserted so as to protrude by a predetermined length, and the amount of soil removed can be changed by changing the rotation speed of the rotary shaft 14, and the soil taken into the pipe 15 is sent through the air pipe 16. Pipe 1 is assisted by the air
Rise within 5.
（発明の効果）
本発明は、以上のようなものであつて、地盤硬
化材の混入による地盤の体積増加を完全に防止す
ることができるから、隣接地に既設構造物が存在
する場合でもこれに対する影響を顧慮することな
く地盤硬化材使用による地盤改良を行うことがで
きる。(Effects of the Invention) The present invention is as described above, and can completely prevent an increase in the volume of the ground due to the mixing of soil hardening materials, even if there is an existing structure on the adjacent land. It is possible to improve the ground by using soil hardening materials without considering the impact on the soil.
第１図〜第３図は本発明による地盤改良の説明
図、第４図〜第７図は本発明実施用装置の説明
図、第８図は排土手段の別例図である。
１……攪拌混合処理部、６……回転軸、７……
攪拌翼、８……排土用スクリユー、……。
FIGS. 1 to 3 are explanatory diagrams of ground improvement according to the present invention, FIGS. 4 to 7 are explanatory diagrams of an apparatus for implementing the present invention, and FIG. 8 is a diagram of another example of earth removal means. 1... Stirring and mixing processing section, 6... Rotating shaft, 7...
Stirring blade, 8...Screw for soil removal,...
Claims (1)
処理する軟弱地盤改良工法において、地盤硬化材
の攪拌混合に先立つて地盤硬化材の使用量に対応
する量の原地盤土壌の排除を行うことを特徴とす
る軟弱地盤改良工法。1. A soft ground improvement method for hardening soft ground by stirring and mixing a soil hardening material, characterized by removing an amount of original soil corresponding to the amount of soil hardening material used prior to stirring and mixing the soil hardening material. Soft ground improvement method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20734385A JPS6268917A (en) | 1985-09-19 | 1985-09-19 | Improvement for weak ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20734385A JPS6268917A (en) | 1985-09-19 | 1985-09-19 | Improvement for weak ground |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20245393A Division JPH0672416B2 (en) | 1993-06-28 | 1993-06-28 | Soft ground improvement method |
| JP5202452A Division JPH07122264B2 (en) | 1993-06-28 | 1993-06-28 | Soft ground improvement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6268917A JPS6268917A (en) | 1987-03-30 |
| JPH0457805B2 true JPH0457805B2 (en) | 1992-09-14 |
Family
ID=16538164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20734385A Granted JPS6268917A (en) | 1985-09-19 | 1985-09-19 | Improvement for weak ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6268917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000186482A (en) * | 1994-07-12 | 2000-07-04 | Daisho Shinki Kk | Earth removing device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314633U (en) * | 1986-07-09 | 1988-01-30 | ||
| JPS63300110A (en) * | 1987-05-29 | 1988-12-07 | Tenotsukusu:Kk | Method and apparatus for ground improving work |
| JPS646410A (en) * | 1987-06-27 | 1989-01-11 | Tenox Kk | Method and apparatus for improving ground |
| JPH03125712A (en) * | 1989-10-12 | 1991-05-29 | Shohei Senda | Poor subsoil improvement method and device |
| JPH079091B2 (en) * | 1990-06-15 | 1995-02-01 | 鹿島建設株式会社 | Soil cement construction method |
| JP4885325B1 (en) * | 2011-05-26 | 2012-02-29 | 清水建設株式会社 | Construction management system for ground improvement method |
| JP2014109179A (en) * | 2012-12-04 | 2014-06-12 | Shimizu Corp | Sand compaction pile construction method |
| JP6564240B2 (en) * | 2014-09-18 | 2019-08-21 | 株式会社ワイビーエム | Column improved pile construction system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58156619A (en) * | 1982-03-15 | 1983-09-17 | Kobe Steel Ltd | Method and apparatus for ground improvement work |
| JPS5965120A (en) * | 1982-10-04 | 1984-04-13 | Seikou Kogyo Kk | Excavating kneader |
-
1985
- 1985-09-19 JP JP20734385A patent/JPS6268917A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58156619A (en) * | 1982-03-15 | 1983-09-17 | Kobe Steel Ltd | Method and apparatus for ground improvement work |
| JPS5965120A (en) * | 1982-10-04 | 1984-04-13 | Seikou Kogyo Kk | Excavating kneader |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000186482A (en) * | 1994-07-12 | 2000-07-04 | Daisho Shinki Kk | Earth removing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6268917A (en) | 1987-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |