JPS63223215A - In-situ concrete piling work - Google Patents
In-situ concrete piling workInfo
- Publication number
- JPS63223215A JPS63223215A JP5598987A JP5598987A JPS63223215A JP S63223215 A JPS63223215 A JP S63223215A JP 5598987 A JP5598987 A JP 5598987A JP 5598987 A JP5598987 A JP 5598987A JP S63223215 A JPS63223215 A JP S63223215A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- tip
- pile
- excavation
- excavated
- 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
Links
- 238000011065 in-situ storage Methods 0.000 title 1
- 239000002689 soil Substances 0.000 claims abstract description 12
- 238000010276 construction Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000009412 basement excavation Methods 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 abstract description 9
- 239000000440 bentonite Substances 0.000 abstract description 9
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 9
- 238000007796 conventional method Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は地中にコンクリートの基礎くいなどを造成す
る場所打ちコンクリート工法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cast-in-place concrete construction method for constructing concrete foundation piles etc. underground.
一般的にコンクリートくいの造成は、スクリュオーガま
たはアースオーガと称されている掘削体を用いて地中に
くい孔を掘削し、そのくい孔にコンクリートを打設する
までの間、孔壁の崩壊を防止覆る目的としてベントナイ
ト水を充填している。Generally, when constructing a concrete pile, a hole that is difficult to penetrate underground is excavated using an excavator called a screw auger or an earth auger, and the collapse of the hole wall is prevented until the concrete is poured into the hole. It is filled with bentonite water for the purpose of prevention and covering.
(発明が解決しようとする問題点)
上記従来工法では、コンクリートの打設時にベントナイ
ト泥水をくい孔から排出する必要があり、またベントナ
イト泥水を排出したのちに、孔壁を洗滌して付着したベ
ントナイトを除去しなければコンクリートの打設を行う
ことができないなどの制約があった。(Problems to be Solved by the Invention) In the conventional method described above, it is necessary to drain bentonite mud from the borehole during concrete pouring, and after draining the bentonite mud, the bentonite that has adhered to the hole wall must be washed. There were restrictions such as the inability to place concrete unless the material was removed.
また排出したベントナイト泥水はそのまま廃棄すること
ができず、泥水中のベントナイトや土砂などを何等かの
手段をもって分離し、更に泥水中の他の混合物を除去し
たのちに排水として処分している。このため工法の実施
に際して多くの付帯設備が要求され、コスト高となるな
どの問題を有する。In addition, the discharged bentonite mud cannot be disposed of as it is, so bentonite, earth and sand in the mud are separated by some means, and other mixtures in the mud are removed before being disposed of as wastewater. Therefore, when implementing the construction method, many incidental facilities are required, leading to problems such as high costs.
この発明は上記従来工法の問題点を解決するために考え
られたものであって、その目的はベントナイト泥水など
の掘削安定液を用いることなくコンクリートの基礎くい
などを場所打ちすることができる新たな工法を提供する
ことにある。This invention was devised to solve the problems of the conventional construction method described above, and its purpose is to create a new method that allows concrete foundation piles to be cast in place without using drilling stabilizing liquid such as bentonite slurry. Our goal is to provide construction methods.
上記目的によるこの発明は、管体の先端部周囲のみスク
リュを有する掘削体を用い、該掘削体の回転をもって掘
削土が残留した杭孔を地中に掘削し、掘削完了後に掘削
体先端より杭孔底部に生コンクリートを注入して、掘削
体を残留掘削土と共に上方に移動させつつ杭孔底部から
上部に生コンクリートを充填したのち、その生コンクリ
ートに鋼管を挿入して所要のくい体を完成することによ
り、上記従来の問題点を解決してなる。This invention for the above-mentioned purpose uses an excavating body having a screw only around the tip of the tube, and by rotating the excavating body, excavates a pile hole in which excavated soil remains underground, and after the excavation is completed, piles are piled from the tip of the excavated body. Fresh concrete is poured into the bottom of the hole, and the excavated body is moved upward along with the remaining excavated soil, filling the pile hole from the bottom to the top with fresh concrete, and then a steel pipe is inserted into the fresh concrete to complete the required pile body. By doing so, the above-mentioned conventional problems are solved.
第1図はこの発明に用いられる掘削機の1例を示すもの
で、1は管体2の先端部周囲のみスクリュ3を有する掘
削体で、管体2には図面では省略したが、ビット4を取
付けた先端に開口するコンクリート注入管と、先端側部
に噴射口を有するモルタル圧送管が設けである。FIG. 1 shows one example of an excavator used in the present invention, and 1 is an excavator having a screw 3 only around the tip of a tube 2, and the tube 2 has a bit 4 (not shown in the drawing). There is a concrete injection pipe that opens at the tip where the concrete is attached, and a mortar pressure feed pipe that has an injection port on the side of the tip.
上記掘削体1は掘削槽5の下部に設けた回転装置6に管
体2を挿通するとともに、掘削槽5の側部に沿って移動
する重錘7と共に、掘削槽5のIC1部のシーブ8に回
転自在に吊設して掘削機にセットされている。The excavating body 1 has a pipe body 2 inserted through a rotating device 6 provided at the lower part of the excavating tank 5, and a sheave 8 of the IC 1 part of the excavating tank 5 together with a weight 7 that moves along the side of the excavating tank 5. It is rotatably suspended and set on an excavator.
第2図はくい孔の掘削からコンクリート基礎くいの打設
工程の説明図で、上記掘削体1のビット4を接地したの
ち、重錘7により荷重を加えた状態にて上記回転袋@6
を作動し、管体2と共にスクリュ3及びビット4を回転
して、地盤9の掘削を開始する。Figure 2 is an explanatory diagram of the process from drilling a hole to placing concrete foundation piles. After the bit 4 of the excavation body 1 is grounded, the rotary bag @ 6 is loaded with a weight 7.
is activated, the screw 3 and bit 4 are rotated together with the pipe body 2, and excavation of the ground 9 is started.
この掘削は掘削土10を排出することなくスクリュ3の
間及び管体2の周囲に残留ざ七だまま所定深さまで管体
2を継ぎ足しながら行う。したがって掘削されたくい孔
11は掘削土101fi詰ったままの状態で生ずる。This excavation is carried out while adding the pipe body 2 to a predetermined depth while leaving the excavated soil 10 between the screws 3 and around the pipe body 2 with soil remaining therein. Therefore, the excavated borehole 11 remains filled with excavated soil 101fi.
くい孔11の掘削が完了したならば回転装置6を停止し
、また回転装置6に対して掘削体1を自由な状態にして
から、管体2の上部より管体内に生コンクリート12を
圧送し、管体先端よりくい孔底部に生コンクリート12
を注入する。When the excavation of the pile hole 11 is completed, the rotating device 6 is stopped, and the excavated body 1 is made free with respect to the rotating device 6, and then the ready-mixed concrete 12 is pumped into the tube from the upper part of the tube 2. , fresh concrete 12 is placed at the bottom of the hole from the tip of the tube.
inject.
この注入圧により掘削体1及び掘削土10は上方へ押上
げられ、注入量に伴ってくい孔11の掘削±10が生コ
ンクリート12に徐々に置換される。なお場合によって
は、掘削体1を引上げながら生コンクリート12の注入
してもよい。The excavated body 1 and excavated soil 10 are pushed upward by this injection pressure, and the excavated area ±10 of the borehole 11 is gradually replaced with fresh concrete 12 as the amount of injection increases. In some cases, the ready-mixed concrete 12 may be poured while the excavated body 1 is being pulled up.
上記生コンクリート12の注入が完了したならば、その
生コンクリート12の内に予め準備された所定の鋼管1
3を挿入する。この鋼管13の外側面には、一定間隔ご
とにスペーサ14.14が突設してあり、このスペーサ
14.14により鋼管13はくい孔11に対して垂直に
そして同心円に建込まれて、そこに鋼管13を内蔵した
コンクリート基礎くい15が完成される。When the pouring of the fresh concrete 12 is completed, a predetermined steel pipe 1 prepared in advance is inserted into the fresh concrete 12.
Insert 3. Spacers 14.14 are protruded from the outer surface of the steel pipe 13 at regular intervals, and the spacers 14.14 allow the steel pipe 13 to be built perpendicularly and concentrically to the borehole 11. A concrete foundation pile 15 with a built-in steel pipe 13 is completed.
また拡底くいが必要とされる場合には、生コンクリート
12の注入前に、掘削体1を回転しつつ管体先端よりく
い孔底部の周壁に高圧モルタルを噴射し、底部孔壁を部
分的に掘削してから、生コンクリート12の注入を行う
。In addition, if a bottom-expanding pile is required, before pouring the fresh concrete 12, while rotating the excavation body 1, high-pressure mortar is injected from the tip of the pipe body onto the circumferential wall at the bottom of the hole to partially cover the bottom hole wall. After excavating, ready-mixed concrete 12 is poured.
この発明は上述のように、管体の先端部周囲のみスクリ
ュを有する掘削体の回転をもって、掘削土が残留したく
い孔を地中に掘削し、掘削完了後に掘削体を介してくい
孔底部から上部まで生コンクリートを注入し、しかるの
ちその生コンクリートに鋼管を挿入して所要の場所打コ
ンクリートくいを完成してなることから、産業廃棄物と
して問題を有するベントナイト泥水を使用せずに済み、
また生コンクリートの注入に際して孔壁を洗滌する必要
もなく、従来工法に比べて工程は勿論のこと、掘削設備
をも簡略化されるため、造成コストも著しく低減する。As described above, this invention excavates a hole in the ground in which excavated soil remains by rotating an excavating body having a screw only around the tip of the pipe body, and after excavation is completed, the excavated soil is passed from the bottom of the hole through the excavating body. By pouring fresh concrete to the top and then inserting steel pipes into the fresh concrete to complete the required cast-in-place concrete piles, there is no need to use bentonite slurry, which is problematic as industrial waste.
In addition, there is no need to clean the hole walls when pouring fresh concrete, and compared to conventional construction methods, not only the process but also the excavation equipment is simplified, resulting in a significant reduction in construction costs.
更にまたビットの交換により硬い地盤をも容易に掘削で
き、拡底くいの造成も可能であるなど応用性をも有する
。Furthermore, it has great applicability, such as being able to easily excavate hard ground by changing the bit, and making it possible to create bottom-expanding piles.
図面はこの発明に係る場所打コンクリートくい工法の1
実施例を示すもので、第1図は掘削機の略示正面図、第
2図は工程説明図である。
1・・・掘削体 2・・・管体3・・・スク
リュ 4・・・ビット5・・・掘削槽
6・・・回転装置7・・・重錘 9・
・・地盤10・・・掘削± 11・・・くい
孔12・・・生コンクリート 13・・・鋼管14・
・・スペーサ 15・・・基礎くい特許出願人
株式会社テノックス同 特基
工業株式会社
第1図The drawing shows one of the cast-in-place concrete pile construction methods according to this invention.
An example is shown, and FIG. 1 is a schematic front view of an excavator, and FIG. 2 is a process explanatory diagram. 1... Excavation body 2... Pipe body 3... Screw 4... Bit 5... Excavation tank
6... Rotating device 7... Weight 9.
...Ground 10...Drilling± 11...Pits 12...Ready-mixed concrete 13...Steel pipe 14...
... Spacer 15 ... Basic stake patent applicant Tenox Co., Ltd. Tokki Kogyo Co., Ltd. Figure 1
Claims (1)
該掘削体の回転をもって掘削土が残留した杭孔を地中に
掘削し、掘削完了後に掘削体先端より杭孔底部に生コン
クリートを注入して、掘削体を残留掘削土と共に上方に
移動させつつ杭孔底部から上部に生コンクリートを充填
したのち、その生コンクリートに鋼管を挿入して所要の
杭体を完成してなることを特徴とする場所打コンクリー
トくい工法。Using a drilling body with a screw only around the tip of the tube,
A pile hole with residual excavated soil is excavated into the ground by the rotation of the excavation body, and after the excavation is completed, fresh concrete is poured into the bottom of the pile hole from the tip of the excavation body, and the excavation body is moved upward with the remaining excavated soil. A cast-in-place concrete pile construction method characterized by filling ready-mixed concrete from the bottom to the top of the pile hole, and then inserting steel pipes into the ready-mixed concrete to complete the required pile body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5598987A JPS63223215A (en) | 1987-03-11 | 1987-03-11 | In-situ concrete piling work |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5598987A JPS63223215A (en) | 1987-03-11 | 1987-03-11 | In-situ concrete piling work |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63223215A true JPS63223215A (en) | 1988-09-16 |
Family
ID=13014498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5598987A Pending JPS63223215A (en) | 1987-03-11 | 1987-03-11 | In-situ concrete piling work |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63223215A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006312865A (en) * | 2005-04-04 | 2006-11-16 | Tenox Corp | Method for replacing and constructing column, and replaced column |
JP2008025268A (en) * | 2006-07-24 | 2008-02-07 | Tenox Corp | Displacement construction method of column |
JP2008031713A (en) * | 2006-07-28 | 2008-02-14 | Tenox Corp | Replacing construction method of column |
JP2014111893A (en) * | 2009-10-20 | 2014-06-19 | Tenox Corp | Method and device for constructing hydraulic solidification material liquid-substituted column |
-
1987
- 1987-03-11 JP JP5598987A patent/JPS63223215A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006312865A (en) * | 2005-04-04 | 2006-11-16 | Tenox Corp | Method for replacing and constructing column, and replaced column |
JP2008025268A (en) * | 2006-07-24 | 2008-02-07 | Tenox Corp | Displacement construction method of column |
JP2008031713A (en) * | 2006-07-28 | 2008-02-14 | Tenox Corp | Replacing construction method of column |
JP2014111893A (en) * | 2009-10-20 | 2014-06-19 | Tenox Corp | Method and device for constructing hydraulic solidification material liquid-substituted column |
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