JPH07317052A - Method of dynamic injection construction for foundation improvement - Google Patents
Method of dynamic injection construction for foundation improvementInfo
- Publication number
- JPH07317052A JPH07317052A JP11674294A JP11674294A JPH07317052A JP H07317052 A JPH07317052 A JP H07317052A JP 11674294 A JP11674294 A JP 11674294A JP 11674294 A JP11674294 A JP 11674294A JP H07317052 A JPH07317052 A JP H07317052A
- Authority
- JP
- Japan
- Prior art keywords
- medium
- injection
- grout
- ground
- pouring
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、岩盤の割れ目等に注入
材料（グラウト）を浸透させて、地盤の強化を行う地盤
改良工法において、注入材料に振動等を与える動的注入
工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 dynamic pouring method for imparting vibration or the like to a pouring material in a ground improvement method in which a pouring material (grout) is infiltrated into cracks of rock to strengthen the ground. is there.
【０００２】[0002]
【従来の技術】ダム工事や岩盤に燃料貯蔵用の貯槽や高
レベル放射性廃棄物の処分坑などを形成する場合に、岩
盤の割れ目に注入材料（グラウト）を浸透させて地盤の
強化を行うことがある。2. Description of the Related Art When dam construction or formation of a storage tank for fuel storage or a pit for disposal of high-level radioactive waste in rock, etc., the injection material (grout) is infiltrated into a crack in the rock to strengthen the ground. There is.
【０００３】このような注入材料（グラウト）は、岩盤
等の地盤に設ける孔内に注入管を挿入し、この注入管先
端から注出して孔壁の割れ目から浸透させるが、従来か
らセメント系注入における地盤の改良限界は、透水係数
にして10-5cm／sec 程度であると考えられている。Such an injection material (grout) is prepared by inserting an injection pipe into a hole provided in the ground such as rock and pouring out from the tip of the injection pipe to permeate through a crack in the hole wall. It is considered that the soil improvement limit is about 10 -5 cm / sec in terms of hydraulic conductivity.
【０００４】しかし、セメントミルク、セメントベント
ナイト、その他懸濁型の注入材料（グラウト）は振動を
与えると粘性が低下することで、浸透性がよくなり、細
かな岩盤の割れ目等に注入し易いものとなるので、岩盤
の浸透係数で10-7〜10-8cm／sec 程度まで改良が可能と
考えられる。[0004] However, cement milk, cement bentonite, and other suspension type injection materials (grouts) have a low viscosity when they are vibrated, so that their permeability is improved and they are easy to inject into fine cracks in rock mass. Therefore, it is considered possible to improve the permeability coefficient of bedrock to about 10 -7 to 10 -8 cm / sec.
【０００５】このように高濃度の注入材料（グラウト）
に振動等を与え、粘性を低下させる注入工法を動的注入
（Dynamic Injection ）工法と称するが、その１例を図
３に示す。Injecting material (grout) having such a high concentration
An injection method for applying a vibration or the like to the body to reduce the viscosity is called a dynamic injection method, and one example thereof is shown in FIG.
【０００６】図中１はコロイダルミキサー、２はアジテ
ータ、３はフランジャーポンプで、これらは注入材料
（グラウト）であるセメントや添加剤や水、もしくはナ
トリウムベントナイト等を混合して注入材料（グラウ
ト）を作成するものとして配置される。In the figure, 1 is a colloidal mixer, 2 is an agitator, 3 is a flanger pump, and these are mixed with an injection material (grout) such as cement, an additive, water, or sodium bentonite to obtain an injection material (grout). Placed as something to create.
【０００７】また、前記フランジャーポンプ３から注入
材料（グラウト）を送り出すピストン４とグラウトシリ
ンダー５とからなる送り出し装置にパーカッション６を
付設し、パーカッション６でこれらピストン４とグラウ
トシリンダー５を振動させることで送り出す注入材料
（グラウト）に振動を与えるようにしている。図中７は
岩盤等の地盤に設ける注入用の孔、８は前記グラウトシ
リンダー５に接続され、この孔７への吐出を行うホース
等の注入管である。Further, a percussion 6 is attached to a feeding device composed of a piston 4 and a grout cylinder 5 for feeding the injection material (grout) from the flanger pump 3, and the percussion 6 vibrates the piston 4 and the grout cylinder 5. Vibration is applied to the injected material (grout) sent out. In the figure, 7 is an injection hole provided in the ground such as rock, and 8 is an injection pipe such as a hose which is connected to the grout cylinder 5 and discharges into the hole 7.
【０００８】[0008]
【発明が解決しようとする課題】しかし、前記図３に示
す動的注入工法では、注入材料（グラウト）の送り出し
装置の所で振動を加えるものであり、地盤の奥での深度
のある場所に注入する場合はそこに到り着くまでに振動
の減衰が著しく、注入材料の粘性がもとに戻り、浸透性
向上の効果が充分発揮されないおそれがある。However, in the dynamic pouring method shown in FIG. 3, vibration is applied at the pouring device of the pouring material (grout), and the pouring is performed at a deep place in the ground. When pouring, the vibration is significantly attenuated by the time it reaches the point, and the viscosity of the pouring material is restored, and the effect of improving the permeability may not be fully exerted.
【０００９】本発明の目的は前記従来例の不都合を解消
し、注入材料（グラウト）に与える振動や衝撃の減衰を
惹起することなく、粘性の低下した注入材料（グラウ
ト）を効果的に浸透させることができる地盤改良の動的
注入工法を提供することにある。The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and to effectively permeate an injecting material (grout) having a reduced viscosity without causing damping of vibration or impact applied to the injecting material (grout). The object of the present invention is to provide a ground improvement dynamic pouring method.
【００１０】[0010]
【課題を解決するための手段】本発明は前記目的を達成
するため、地盤に設ける孔内に注入管を挿入し、この注
入管からセメントミルク、セメントベントナイト、その
他の懸濁型の注入材料（グラウト）を注出し、これを地
盤に浸透させることで地盤の強化を行う地盤改良工法に
おいて、前記孔内の注入管先端部分に振動媒体もしくは
衝撃媒体を設け、この振動媒体もしくは衝撃媒体で注入
材料（グラウト）に振動もしくは衝撃を与えて注出する
こと、および、孔内の注入個所をパッカーで閉塞し、振
動媒体もしくは衝撃媒体はこの閉塞部に配置することを
要旨とするものである。In order to achieve the above-mentioned object, the present invention inserts an injection pipe into a hole provided in the ground, and from this injection pipe cement milk, cement bentonite, and other suspension type injection materials ( In a ground improvement method in which ground is strengthened by pouring out grout) and infiltrating it into the ground, a vibration medium or impact medium is provided at the tip of the injection pipe in the hole, and the injection medium is injected with this vibration medium or impact medium. The gist is that the (grout) is vibrated or shocked to be poured out, and the injection point in the hole is closed by a packer, and the vibration medium or the impact medium is placed in this closed portion.
【００１１】[0011]
【作用】請求項１記載の本発明によれば、孔底部の注入
管先端部分で注入材料（グラウト）に振動もしくは衝撃
を与えて注出するものであり、孔の深度が深い場合でも
孔底部でこれを行うので、振動や衝撃の減衰を惹起する
ことなく粘性の低下した注入材料（グラウト）をすぐに
岩盤等の細かい割れ目に浸透させることができる。According to the first aspect of the present invention, the injection material (grout) is vibrated or impacted at the tip of the injection pipe at the bottom of the hole to be poured out. Since this is done in (1), it is possible to immediately infiltrate fine cracks such as bedrock with the injected material (grout) having reduced viscosity without causing vibration or shock attenuation.
【００１２】請求項２記載の本発明によれば、前記作用
に加えて、孔が深いものであっても、この孔内の注入個
所をパッカーで閉塞することで、その部分で効果的に注
入材料（グラウト）の浸透を集中させることができる。
また、５，６ｍ程度で孔を掘り進み、本発明をその都度
行うことで、大深度でも注入による地盤強化が可能とな
る。According to the second aspect of the present invention, in addition to the above-mentioned action, even if the hole is deep, the injection point in the hole is closed by the packer, so that the injection is effectively performed at that portion. The penetration of the material (grout) can be concentrated.
Further, by digging holes at about 5 and 6 m and carrying out the present invention each time, it is possible to strengthen the ground by pouring even at a large depth.
【００１３】[0013]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。図１は本発明良の動的注入工法の１実施例を
示す説明図で、前記図３に示す従来例と同一構成要素に
は同一参照符号を付したものである。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of the dynamic injection method of the present invention, in which the same components as those of the conventional example shown in FIG. 3 are designated by the same reference numerals.
【００１４】地上にはアジテータ２とグラウトポンプ11
を設置し、グラウトポンプ11からのホースによる注入管
８を地盤に設ける孔７内に挿入する。On the ground, an agitator 2 and a grout pump 11
Is installed, and the injection pipe 8 by the hose from the grout pump 11 is inserted into the hole 7 provided in the ground.
【００１５】そして、孔７の底部で、前記の注入管８の
先端部分に振動媒体９を配設した。なお、この孔７は径
が４〜７cm程度で、５，６ｍ毎に掘り進む。At the bottom of the hole 7, a vibrating medium 9 is arranged at the tip of the injection tube 8. The hole 7 has a diameter of about 4 to 7 cm and is dug every 5 or 6 m.
【００１６】孔７の先端から５，６ｍ程度の所を注入個
所としてエアーやレザーによるパッカー10で閉塞し、注
入管８はこのパッカー10を貫通させ、前記振動媒体９は
該パッカー10の下方の区画された部分に配設するものと
する。An injection point is located at about 5 or 6 m from the tip of the hole 7 and is closed by a packer 10 made of air or leather. The injection pipe 8 penetrates the packer 10 and the vibrating medium 9 is located below the packer 10. It shall be placed in a partitioned section.
【００１７】前記振動媒体９としては、超音波振動子を
有する超音波振動体や、バイブレータ、パーカッション
などが考えられる。そしてこれらの駆動動力としての電
気やエアーは注入管８にコードやホースを添設し、これ
らを振動媒体９に接続したり、振動媒体９中に駆動動力
を設備すればよい。The vibrating medium 9 may be an ultrasonic vibrating body having an ultrasonic vibrator, a vibrator, a percussion or the like. Electricity or air as driving power for these may be obtained by attaching a cord or a hose to the injection pipe 8 to connect them to the vibration medium 9 or providing the driving power in the vibration medium 9.
【００１８】このようにしてグラウトポンプ11から注入
管８を介して孔７内の注入部に送り出されるセメントミ
ルク、セメントベントナイト、その他の懸濁型の注入材
料（グラウト）は、注入管８の先端から出る前に振動媒
体９で振動を与えられて粘性の低下したものとなる。Cement milk, cement bentonite, and other suspension type injection materials (grouts) thus sent from the grout pump 11 to the injection portion in the hole 7 through the injection tube 8 are the tips of the injection tube 8. Before it comes out of the room, the vibrating medium 9 vibrates it to reduce its viscosity.
【００１９】他の実施例として、図示は省略するが振動
媒体９の代わりにエアーガン等の衝撃媒体を配設し、こ
の衝撃媒体により注入材料（グラウト）に衝撃力を加え
るようにしてもよい。第１実施例の振動媒体９の場合は
周期的な振動が加えられ、第２実施例の衝撃媒体の場合
は単発的な衝撃力が加えられることになるが、衝撃媒体
の衝撃力の方が影響力が強いので、これを適宜に繰り返
せばより効果的なものとなる。As another embodiment, although not shown, an impact medium such as an air gun may be provided instead of the vibrating medium 9 and an impact force may be applied to the injection material (grout) by this impact medium. In the case of the vibrating medium 9 of the first embodiment, periodic vibration is applied, and in the case of the impact medium of the second embodiment, a single impact force is applied, but the impact force of the impact medium is higher. Since it has a strong influence, repeating this as appropriate will make it more effective.
【００２０】前記のごとく粘性の低下した注入材料（グ
ラウト）は注入管８から出てすぐに岩盤等の細かい割れ
目に浸透させることができ、パッカー10を解除し注入管
８を引き上げて孔７をさらに掘り進め、同様な作業を繰
り返して深い個所まで地盤改良が可能となる。The pouring material (grout) whose viscosity has decreased as described above can penetrate the fine cracks in the rock or the like immediately after coming out of the pouring pipe 8, the packer 10 is released, and the pouring pipe 8 is pulled up to form the hole 7. It is possible to further dig and repeat similar work to improve the ground to deep places.
【００２１】また、さらに他の実施例として、孔７は当
初から長く深いものであり、この孔７内の注入個所の上
下をパッカー10で閉塞し、振動媒体９もしくは衝撃媒体
はこのパッカー10での閉塞部に配置するようにしてもよ
い。Further, as still another embodiment, the hole 7 is long and deep from the beginning, and the packing part 10 closes the top and bottom of the injection point in the hole 7, and the vibration medium 9 or the impact medium is packed in this packer 10. You may make it arrange | position in the block part of this.
【００２２】[0022]
【発明の効果】以上述べたように本発明の地盤改良の動
的注入工法は、地盤に設ける孔内に注入管を挿入し、こ
の注入管からセメントミルク、セメントベントナイト、
その他の懸濁型の注入材料（グラウト）を注出し、これ
を地盤に浸透させることで地盤の強化を行う地盤改良工
法において、注入材料（グラウト）に与える振動や衝撃
の減衰を惹起することなく、粘性の低下した注入材料
（グラウト）を効果的に浸透させることができるもので
ある。As described above, the dynamic injection construction method for ground improvement of the present invention is such that an injection pipe is inserted into a hole provided in the ground, and cement milk, cement bentonite,
In the ground improvement method of pouring other suspension type injection material (grout) and infiltrating it into the ground to reinforce the ground, without damaging the vibration or shock given to the injection material (grout). In addition, it is possible to effectively permeate an injection material (grout) having a reduced viscosity.
【図１】本発明の地盤改良の動的注入工法の１実施例を
示す説明図である。FIG. 1 is an explanatory diagram showing one embodiment of a ground improvement dynamic pouring method of the present invention.
【図２】本発明の地盤改良の動的注入工法の他の実施例
を示す要部の縦断側面図である。FIG. 2 is a vertical cross-sectional side view of essential parts showing another embodiment of the ground improvement dynamic pouring method of the present invention.
【図３】従来例を示す説明図である。FIG. 3 is an explanatory diagram showing a conventional example.
１…コロイダルミキサー ２…アジテータ ３…フランジャーポンプ ４…ピストン ５…グラウトシリンダー ６…パーカッショ
ン ７…孔 ８…注入管 ９…振動媒体 10…パッカー 11…グラウトポンプ1 ... Colloidal mixer 2 ... Agitator 3 ... Flanger pump 4 ... Piston 5 ... Grout cylinder 6 ... Percussion 7 ... Hole 8 ... Injection pipe 9 ... Vibration medium 10 ... Packer 11 ... Grout pump
Claims (2)
の注入管からセメントミルク、セメントベントナイト、
その他の懸濁型の注入材料を注出し、これを地盤に浸透
させることで地盤の強化を行う地盤改良工法において、
前記孔内の注入管先端部分に振動媒体もしくは衝撃媒体
を設け、この振動媒体もしくは衝撃媒体で注入材料に振
動もしくは衝撃を与えて注出することを特徴とした地盤
改良の動的注入工法。1. An injection pipe is inserted into a hole provided in the ground, and cement milk, cement bentonite,
In the ground improvement method that strengthens the ground by pouring out other suspension type injection materials and infiltrating this into the ground,
A dynamic pouring method for ground improvement, characterized in that a vibrating medium or impact medium is provided at the tip of the pouring pipe in the hole, and the pouring material is poured by vibrating or impacting with the vibrating medium or impact medium.
動媒体もしくは衝撃媒体はこの閉塞部に配置する請求項
１記載の地盤改良の動的注入工法。2. The dynamic injection construction method for ground improvement according to claim 1, wherein the pouring portion in the hole is closed by a packer, and the vibration medium or the impact medium is arranged in this closed portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11674294A JP2952324B2 (en) | 1994-05-30 | 1994-05-30 | Dynamic injection method of ground improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11674294A JP2952324B2 (en) | 1994-05-30 | 1994-05-30 | Dynamic injection method of ground improvement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07317052A true JPH07317052A (en) | 1995-12-05 |
| JP2952324B2 JP2952324B2 (en) | 1999-09-27 |
Family
ID=14694666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11674294A Expired - Fee Related JP2952324B2 (en) | 1994-05-30 | 1994-05-30 | Dynamic injection method of ground improvement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952324B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001207437A (en) * | 2000-01-27 | 2001-08-03 | Kajima Corp | Reinforcing method for lower ground of existing structure |
| JP2007040011A (en) * | 2005-08-04 | 2007-02-15 | Shimizu Corp | Grout method |
| JP2009144453A (en) * | 2007-12-17 | 2009-07-02 | Nittoc Constr Co Ltd | Injection construction method |
| KR101007287B1 (en) * | 2008-04-02 | 2011-01-13 | 최영준 | Method and apparatus for injecting reinforcing material in near-vibrating manner |
| KR101011785B1 (en) * | 2009-12-08 | 2011-02-07 | 박용원 | Apparatus for injecting grout material and method for injecting grout material using the same |
| JP2011059044A (en) * | 2009-09-14 | 2011-03-24 | Japan Atomic Energy Agency | Grout injection method |
| CN107796929A (en) * | 2017-11-06 | 2018-03-13 | 华侨大学 | Elastic wave aids in cement ejection for water plugging model test apparatus |
| JP2019031844A (en) * | 2017-08-09 | 2019-02-28 | 日特建設株式会社 | Injection method, and vibration applying device used in the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102197924B1 (en) * | 2020-06-02 | 2021-01-04 | 박성진 | A System for Reinforcing Foundation with Imoroved Permeating Ability of Reinforcing Materials |
-
1994
- 1994-05-30 JP JP11674294A patent/JP2952324B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001207437A (en) * | 2000-01-27 | 2001-08-03 | Kajima Corp | Reinforcing method for lower ground of existing structure |
| JP2007040011A (en) * | 2005-08-04 | 2007-02-15 | Shimizu Corp | Grout method |
| JP4687963B2 (en) * | 2005-08-04 | 2011-05-25 | 清水建設株式会社 | Grout method |
| JP2009144453A (en) * | 2007-12-17 | 2009-07-02 | Nittoc Constr Co Ltd | Injection construction method |
| KR101007287B1 (en) * | 2008-04-02 | 2011-01-13 | 최영준 | Method and apparatus for injecting reinforcing material in near-vibrating manner |
| JP2011059044A (en) * | 2009-09-14 | 2011-03-24 | Japan Atomic Energy Agency | Grout injection method |
| KR101011785B1 (en) * | 2009-12-08 | 2011-02-07 | 박용원 | Apparatus for injecting grout material and method for injecting grout material using the same |
| JP2019031844A (en) * | 2017-08-09 | 2019-02-28 | 日特建設株式会社 | Injection method, and vibration applying device used in the same |
| CN107796929A (en) * | 2017-11-06 | 2018-03-13 | 华侨大学 | Elastic wave aids in cement ejection for water plugging model test apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2952324B2 (en) | 1999-09-27 |
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