JPS6154885B2 - - Google Patents
Info
- Publication number
- JPS6154885B2 JPS6154885B2 JP2459379A JP2459379A JPS6154885B2 JP S6154885 B2 JPS6154885 B2 JP S6154885B2 JP 2459379 A JP2459379 A JP 2459379A JP 2459379 A JP2459379 A JP 2459379A JP S6154885 B2 JPS6154885 B2 JP S6154885B2
- Authority
- JP
- Japan
- Prior art keywords
- pile body
- pile
- rod
- hardening agent
- injected
- 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
Links
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 6
- 239000008267 milk Substances 0.000 claims description 6
- 210000004080 milk Anatomy 0.000 claims description 6
- 235000013336 milk Nutrition 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
本発明は杭基盤施工法に関するもので、特に杭
体先端部の周囲に複数の注入孔を穿つたフリクシ
ヨンカツター若しくは杭を地盤の所定深度に挿入
し、注入ロツドを用いて、杭下基盤を改良すると
同時に、注入孔を通して杭体外に硬化剤を注出
し、基盤と杭体と結合させ強大な支持力を得るよ
うにした杭基盤施工法である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pile foundation construction method, and in particular, a friction cutter or pile with a plurality of injection holes around the tip of the pile is inserted into the ground at a predetermined depth, and an injection rod is inserted into the ground. This is a pile foundation construction method that improves the foundation under the pile by using a hardening agent, and at the same time pours a hardening agent out of the pile body through the injection hole, and combines the foundation and pile body to obtain a strong bearing capacity.
従来の基盤施工法では、土を掘削しながら杭体
を下降させて所定の深度に達したとき杭下端部に
モルタルを注入して、杭の下端の支持のみに固執
したもので、支持力は弱い。 In the conventional foundation construction method, the pile is lowered while excavating the soil, and when it reaches a predetermined depth, mortar is injected into the lower end of the pile to support only the lower end of the pile, and the bearing capacity is weak.
本発明は前記の点に鑑み、この対策としての基
盤施工法を提供するものである。即ち、強大な支
持力を得ることを目的としたものである。以下本
発明に係る杭基盤施工法を添付図面に基づいて具
体的に説明する。 In view of the above points, the present invention provides a foundation construction method as a countermeasure to this problem. In other words, the purpose is to obtain a strong supporting force. The pile foundation construction method according to the present invention will be specifically explained below based on the attached drawings.
１は先端部に注入孔２を複数個穿つたコンクリ
ートパイル鋼管等の杭体で、この杭体１は、差圧
弁とスタビライザー４及びパツカー５を装着した
ロツド６を用い、このロツド６を掘削機３により
ポンプ吐出圧20〜30Kg／cm2にて先端部のノズル７
から水と微量のエアーを噴射させ、地盤条件に応
じたロツド回転とストローク速度にて削孔しなが
ら挿入し、所定の深さまで削孔８して前記杭体１
の支持層まで挿入すると、その挿入した位置でロ
ツド６の回転を所定の回転数にかえ、更にエアー
コンプレツサーを全開してロツドの先端側ノズル
７′からエアージエツトを行ない、その後、削孔
水をセメントミルク等の硬化剤に切替え、圧力を
200Kg／cm2に高め、差圧弁を作動し、セメントミ
ルク等硬化剤の飛距離を杭体１の半径より大なる
ようにして噴射を行ないながら徐々にロツド６を
引上げる。この時地盤は硬化剤のゼツトで破枠さ
れ撹拌されてセメントミルク等の硬化剤と混合し
て杭体径より大なる径の円注状とした改良地盤９
がなされ、これが杭体１の下部に達したとき、ポ
ンプ圧力を100Kg／cm2に減圧し、杭体１内の土砂
を洗いながら硬化剤を杭体１内に噴射する。この
時前記ロツド６に装着したパツカー５にエアーを
注入して膨張させパツカー５で杭体１内を塞閉し
て地盤に応じた注入圧でセメントミルク等の硬化
剤をロツド６を回転しながらノズルから噴射して
杭体１の端部に穿つた注入孔２より杭体１の外側
に硬化剤を注入される。なお、この注入孔２は杭
体自体ではなく、これに装着されるフリクシヨン
カツターに穿つてあれば同様の効果を得ることが
できる。この注入を行なつて杭体１の下端部が結
合され根固が終了するとロツド６を引き揚げるの
である。 1 is a pile body such as a concrete pile steel pipe with a plurality of injection holes 2 bored at its tip.This pile body 1 is constructed using a rod 6 equipped with a differential pressure valve, a stabilizer 4, and a packer 5, and this rod 6 is driven by an excavator. 3, the nozzle 7 at the tip at a pump discharge pressure of 20 to 30 Kg/cm 2.
Water and a small amount of air are injected from the pile body, and the pile body 1 is inserted while drilling at a rod rotation and stroke speed according to the ground conditions.
When the rod 6 is inserted into the supporting layer, the rotation of the rod 6 is changed to the specified rotation speed at the inserted position, and the air compressor is fully opened to jet air from the nozzle 7' on the tip side of the rod. Switch to a hardening agent such as cement milk and increase the pressure.
The pressure is increased to 200 kg/cm 2 , the differential pressure valve is operated, and the rod 6 is gradually pulled up while spraying the hardening agent such as cement milk so that the distance is greater than the radius of the pile body 1 . At this time, the ground is broken with hardening agent Zett, stirred, and mixed with a hardening agent such as cement milk to form improved ground into a circular pot shape with a diameter larger than the diameter of the pile body9.
When this reaches the lower part of the pile body 1, the pump pressure is reduced to 100 kg/cm 2 and the hardening agent is injected into the pile body 1 while washing the earth and sand inside the pile body 1. At this time, air is injected into the packer 5 attached to the rod 6 to inflate it, seal the inside of the pile body 1 with the packer 5, and apply a hardening agent such as cement milk at an injection pressure depending on the ground while rotating the rod 6. The hardening agent is injected from a nozzle to the outside of the pile body 1 through an injection hole 2 bored at the end of the pile body 1. Note that the same effect can be obtained if the injection hole 2 is bored not in the pile body itself but in the friction cutter attached to the pile body. After this injection is performed, the lower end of the pile body 1 is joined, and when the foundation hardening is completed, the rod 6 is pulled up.
上述のように、本発明は先端部に複数個の注入
孔２を穿つた杭体１を用いて、杭体１の下端部に
円柱状の改良地盤９を得た後、杭体１に穿つた注
入孔２を通してセメントミルク等の硬化剤を杭体
１内及び注入孔２を通して杭体１外周に注入して
杭体１の下端部を結合附着させるようにしたの
で、杭体１の支持力は増大できる特徴がある。 As described above, the present invention uses a pile body 1 with a plurality of injection holes 2 drilled at its tip, and after obtaining a cylindrical improved ground 9 at the lower end of the pile body 1, holes are drilled into the pile body 1. A hardening agent such as cement milk is injected into the pile body 1 and around the outer circumference of the pile body 1 through the injection hole 2 to connect and attach the lower end of the pile body 1, so that the bearing capacity of the pile body 1 is reduced. has the characteristic that it can be increased.
図面は本発明に係る杭基盤施工法の順序を示し
た説明図で、第１図は掘削深度まで削孔して杭体
を挿入した状態図、第２図はロツドを挿入し基盤
施工前の状態図、第３図は基盤施工時の状態図、
第４図は基盤施工後、杭体内に硬化剤を噴射中の
状態図、第５図はパツカーを膨張させ、杭体を閉
塞し、硬化剤を杭体に穿つた孔を通して杭体の外
側に注入する状態図、第６図は根固めを行なつて
ロツドを抜き取る状態図、第７図は完了時の状態
図、第８図は杭体の実施例を示す一部切欠斜視図
である。
１〜杭体、２〜注入孔、３〜掘削機、４〜スタ
ビライザー、５〜パツカー、６〜ロツド、７，
７′〜ノズル、８〜削孔、９〜改良基盤。
The drawings are explanatory diagrams showing the sequence of the pile foundation construction method according to the present invention. Figure 1 shows the state after drilling the hole to the excavation depth and inserting the pile body, and Figure 2 shows the state after inserting the rod and before foundation construction. State diagram, Figure 3 is a state diagram during foundation construction,
Figure 4 is a state diagram of the hardening agent being injected into the pile body after the foundation has been constructed. Figure 5 is a diagram showing the situation when the hardener is being injected into the pile body. Figure 5 is a diagram showing how the packer is expanded, the pile body is closed, and the hardening agent is injected through the hole drilled into the pile body to the outside of the pile body. FIG. 6 is a diagram showing the state of pouring, FIG. 6 is a diagram of the state of hardening and removing the rod, FIG. 7 is a diagram of the state after completion, and FIG. 8 is a partially cutaway perspective view showing an embodiment of the pile body. 1-pile body, 2-injection hole, 3-excavator, 4-stabilizer, 5-packer, 6-rod, 7,
7'~Nozzle, 8~Drilling, 9~Improved base.
Claims (1)
若しくは周囲に複数個の注入孔を穿つたフリクシ
ヨンカツターを装着した杭体を用い、この杭体を
対象地盤中に挿入すると共に、杭体の中空部を貫
通する側方ノズルを備えたロツドを杭体下端より
下部の杭体支持層まで挿入し、ロツドを回転させ
ながら側方ノズルからエアジエツトを行ない、更
にロツドからの硬化剤飛距離が杭体の半径より大
なるようにセメントミルク等の硬化剤を高圧噴射
してロツドを杭体下端まで引上げて、円柱状の改
良基盤を得た後、ロツドに装着したパツカーを拡
開膨張させて杭体中空部の上部を閉鎖密閉し更に
杭体内に硬化剤を噴出すると共に中空部内の圧力
を上昇させ杭体に穿つた注入孔を通して地盤に応
じた注入圧で硬化剤を杭体外側に浸出注入し、基
盤と杭体の下端及び下側部を附着結合させること
を特徴とした杭基盤施工法。1 Using a pile body with multiple injection holes around the tip or a pile body equipped with a friction cutter with multiple injection holes around the periphery, insert this pile body into the target ground and A rod equipped with a side nozzle that penetrates the hollow part of the pile body is inserted from the bottom end of the pile body to the lower pile support layer, and air is jetted from the side nozzle while rotating the rod. A hardening agent such as cement milk is injected at high pressure so that the flying distance is greater than the radius of the pile body, and the rod is pulled up to the bottom end of the pile body. After obtaining a cylindrical improved base, the pack car attached to the rod is expanded. The upper part of the hollow part of the pile body is inflated and sealed, and the hardening agent is injected into the pile body, increasing the pressure inside the hollow part, and the hardening agent is injected into the pile body through the injection hole drilled in the pile body at an injection pressure depending on the ground. A pile foundation construction method characterized by injecting leaching to the outside and attaching the base and the lower end and lower side of the pile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2459379A JPS55116923A (en) | 1979-03-05 | 1979-03-05 | Method for construction of pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2459379A JPS55116923A (en) | 1979-03-05 | 1979-03-05 | Method for construction of pile foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55116923A JPS55116923A (en) | 1980-09-08 |
| JPS6154885B2 true JPS6154885B2 (en) | 1986-11-25 |
Family
ID=12142447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2459379A Granted JPS55116923A (en) | 1979-03-05 | 1979-03-05 | Method for construction of pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55116923A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6397187A (en) * | 1986-10-14 | 1988-04-27 | 谷角 寿雄 | Ball charging apparatus for pinball counter |
| JPH0416707Y2 (en) * | 1985-02-15 | 1992-04-14 | ||
| JPH0416705Y2 (en) * | 1985-02-15 | 1992-04-14 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020030907A (en) * | 2000-10-18 | 2002-04-26 | 김상수 | Method of Constructing Pile With Basement |
| KR100523116B1 (en) * | 2003-02-10 | 2005-10-20 | 주식회사 동아지질 | The steel pipe inserting method making use of the rod for injecting super pressure grout in Jet Grouting Pile |
-
1979
- 1979-03-05 JP JP2459379A patent/JPS55116923A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0416707Y2 (en) * | 1985-02-15 | 1992-04-14 | ||
| JPH0416705Y2 (en) * | 1985-02-15 | 1992-04-14 | ||
| JPS6397187A (en) * | 1986-10-14 | 1988-04-27 | 谷角 寿雄 | Ball charging apparatus for pinball counter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55116923A (en) | 1980-09-08 |
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