JPH02274923A - Construction for pile foundation - Google Patents
Construction for pile foundationInfo
- Publication number
- JPH02274923A JPH02274923A JP9664889A JP9664889A JPH02274923A JP H02274923 A JPH02274923 A JP H02274923A JP 9664889 A JP9664889 A JP 9664889A JP 9664889 A JP9664889 A JP 9664889A JP H02274923 A JPH02274923 A JP H02274923A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- pile body
- main body
- ground
- foundation
- 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
- 238000010276 construction Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 23
- 239000002689 soil Substances 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 abstract 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、たとえば住宅用杭基礎を構築するのに好適な
杭基礎の構築方法に係わり、特に、周壁部に貫通孔を形
成した杭本体を地中に貫入、設置した後、杭本体の中空
部に根固め液を圧入することによって杭基礎を構築する
方法に関するものである。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a method for constructing a pile foundation suitable for constructing a pile foundation for a residential building, for example, and particularly relates to a method for constructing a pile foundation that is suitable for constructing a pile foundation for a residential building. This method relates to a method for constructing a pile foundation by penetrating and installing the pile into the ground, and then injecting hardening liquid into the hollow part of the pile body.
「従来の技術」
従来から建築物を建造する場合の基礎構造は地耐力を得
るための地業と独立基礎などの基礎とに分けられる。前
記地業は、地盤の性質、状態等によって、例えば杭打ち
、あるいは薬液注入等による地盤改良法等の手段が適用
されており、また、住宅用基礎などにあっては、前記手
段によって強化された地盤上に上部構造からの荷重を地
盤や地業に伝えるために独立基礎や布基礎等の基礎を設
けることが一般に行なわれている。``Conventional technology'' Traditionally, the foundation structure used in building buildings can be divided into two types: ground construction for obtaining soil bearing capacity, and foundations such as independent foundations. In the above-mentioned land works, methods such as ground improvement methods such as pile driving or chemical injection are applied depending on the nature and condition of the ground.Furthermore, in the case of foundations for houses, etc., it is strengthened by the above methods. In order to transfer the load from the superstructure to the ground and land works, a foundation such as an independent foundation or a cloth foundation is generally installed on the ground.
「発明が解決しようとする課題」
ところで、軟弱地盤等の地業にあっては、例えば薬液注
入による手段や、地盤に孔を開けてその中にコンクリー
トを打設してコンクリート抗を築造する場所打ち杭工法
等による手段などが適用されているが、これらの方法は
その施工が難しいため、種々の地盤への対応が容易では
な（、コスト高になるなどの不満があった。``Problem to be solved by the invention'' By the way, when working on soft ground, for example, methods such as chemical injection, or places where concrete pits are constructed by drilling holes in the ground and pouring concrete into them. Methods such as driven pile construction have been applied, but these methods are difficult to construct and cannot be easily applied to various types of ground (there have been complaints that they are expensive, etc.).
本発明は前記事情に鑑みて提案されたもので、その目的
とするところは、任意の大きさの杭を容易に形成し得て
種々の地盤への適用性を向上することができ、またその
施工が簡単でコスト低下を図ることのできる杭基礎の構
築方法を提供することにある。The present invention has been proposed in view of the above circumstances, and its purpose is to easily form piles of any size and improve applicability to various types of ground. The object of the present invention is to provide a method for constructing a pile foundation that is easy to construct and can reduce costs.
「課題を解決するための手段」
かかる目的を達成するため、本発明は、中空筒状で先端
に錐状の頭部を有する杭本体の周壁部に杭本体の内外に
連通ずる複数の貫通孔を杭本体のの周方向に間隔を開け
かつ長手方向に沿って複数形成しておき、この杭本体を
、その頭部を下にして衝撃もしくは押し込みによって地
中に貫入、設置するとともに、地中に設置した杭本体の
上端開口に根固め液の供給管を連結した後、杭本体の中
空部に根固め液を圧入することによって杭本体の貫通孔
より根固め液を噴出させ、杭本体の周囲で根固め液を硬
化させることを特徴とするものである。``Means for Solving the Problems'' In order to achieve the above object, the present invention provides a plurality of through holes that communicate with the inside and outside of the pile body in the peripheral wall of the pile body that has a hollow cylindrical shape and has a conical head at the tip. A plurality of pile bodies are formed at intervals in the circumferential direction of the pile body and along the longitudinal direction, and the pile body is penetrated and installed into the ground by impact or pushing with its head facing down. After connecting the supply pipe of the root hardening liquid to the upper end opening of the pile body installed in the pile body, the root hardening liquid is forced into the hollow part of the pile body, and the root hardening liquid is squirted out from the through hole of the pile body. It is characterized by hardening the root hardening solution around it.
「作用」
杭本体を地中に貫入、設置した後、杭本体の中空部に根
固め液を圧入すると、圧入された根固め液は、杭本体の
周壁部に形成された貫通孔を介して杭本体の外周に噴−
出し、杭本体周囲の地盤を押し除けて、杭本体の外周で
硬化し杭本体および地盤と一体化する。``Operation'' After the pile body is penetrated into the ground and installed, when the foot hardening liquid is forced into the hollow part of the pile body, the pressed foot hardening liquid flows through the through holes formed in the peripheral wall of the pile body. Spray on the outer periphery of the pile body.
The pile body is pushed out, the ground around the pile body is pushed away, and it hardens around the outer periphery of the pile body and becomes integrated with the pile body and the ground.
また、杭本体に注入する根固め液の圧力を変えると、そ
の圧力によって根固め液の噴出力が変わるため、根固め
液によって押し退けられる部分の大きさが変わり、この
結果、杭の大きさを任意に調整することが可能になる。In addition, if you change the pressure of the root hardening liquid injected into the pile body, the ejection force of the root hardening liquid will change depending on the pressure, so the size of the part displaced by the root hardening liquid will change, and as a result, the size of the pile will change. It becomes possible to adjust it arbitrarily.
「実施例」
以下、本発明の一実施例について添付図面を参照して説
明する。“Embodiment” An embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図ないし第４図は住宅用に適用した杭基礎の構築方
法の工程図を示したもので、符号１は杭基礎が構築され
る地盤であり、図面では、１ａが軟弱地盤の部分を示し
、ｌｂが杭を支持する岩盤の部分を示す。そして、この
地盤１に例えば住宅用の杭基礎を施工する場合には、ま
ず、中空筒状で先端に錐状の頭部２ａを有する杭本体２
の周壁部２ｂに杭本体２の内外に連通ずる複数の貫通孔
２ｃを杭本体２の周方向に間隔を開けかつ長手方向に沿
って複数形成しておく。Figures 1 to 4 show process diagrams of the construction method for pile foundations applied to residential buildings. Reference numeral 1 indicates the ground on which the pile foundation is constructed, and in the drawings, 1a indicates the soft ground. where lb indicates the part of the rock that supports the pile. When constructing, for example, a pile foundation for a house on this ground 1, first, a pile body 2 which is hollow and cylindrical and has a conical head 2a at the tip.
A plurality of through holes 2c communicating with the inside and outside of the pile body 2 are formed in the peripheral wall portion 2b at intervals in the circumferential direction of the pile body 2 and along the longitudinal direction.
次いで、この杭本体２を、第１図および第２図などに示
すように、その頭部２ａを下にして衝撃もしくは押し込
みによって地中に打ち込みながら、その頭部２ａが岩盤
部分ｔｂに達するまで貫入し、設置する。Next, as shown in FIGS. 1 and 2, the pile body 2 is driven into the ground by impact or pushing with the head 2a facing down until the head 2a reaches the bedrock portion tb. Penetrate and install.
そして、第３図に示すように、地盤に貫入、設置した杭
本体２の近くに根固め液を供給するための供給装置３を
セットし１．地中に設置した杭本体２の上端開口に根固
め液の供給管３ａを連結する。Then, as shown in FIG. 3, a supply device 3 for supplying root hardening solution is set near the pile body 2 which has penetrated into the ground and is installed. A supply pipe 3a for a root hardening solution is connected to the upper end opening of the pile body 2 installed underground.
なお、根固め液の供給装置３としては、例えば、第３図
に示すように、根固め液を貯蔵するタンク３ｂと、根固
め液を圧送するポンプ３ｃとからなるものが適用され、
またこのポンプ３ｃはその供給圧を任意に設定し得る制
御手段を具備してなるものが好ましい。また、杭本体２
の中空部に注入する根固め液としては、流動性が良（か
つ分離の少ないものが好ましく、具体的には、フィルセ
メント、セメントミルク等が用いられる。In addition, as the supply device 3 for the root hardening liquid, for example, as shown in FIG. 3, one consisting of a tank 3b for storing the root hardening liquid and a pump 3c for pumping the root hardening liquid is applied,
Further, it is preferable that the pump 3c is equipped with a control means that can arbitrarily set the supply pressure. In addition, the pile body 2
As the root hardening liquid injected into the hollow part, it is preferable to use one that has good fluidity (and less separation), and specifically, fill cement, cement milk, etc. are used.
杭本体２と供給管３ａとの連結が完了したならば、この
状態において、ポンプ３ｃを作動し、ポンプ３ｃの制御
手段を制御しながら、杭本体２の中空部に根固め液を圧
入することによって杭本体２の貫通孔２ｃより根固め液
を噴出させ、杭本体２の周囲で根固め液を硬化させる（
第４図参照）。Once the connection between the pile body 2 and the supply pipe 3a is completed, in this state, the pump 3c is operated and the foot hardening liquid is pressurized into the hollow part of the pile body 2 while controlling the control means of the pump 3c. The root hardening liquid is ejected from the through hole 2c of the pile body 2, and the root hardening liquid is hardened around the pile body 2 (
(See Figure 4).
この際、杭本体２の貫通孔２ｃより噴出させられた根固
め液は、根固め液のノズル部を形成する貫通孔２ｃが杭
本体２の周方向に沿って間隔を開けかつ杭本体２の長手
方向に沿って形成されているために、杭本体２の長手方
向全周にわたって放射状に噴出させられて固まり、杭本
体２と一体化した杭基礎Ｃが構築されることになる。At this time, the root hardening liquid spouted from the through holes 2c of the pile body 2 is such that the through holes 2c forming the nozzle portions of the pile body 2 are spaced apart along the circumferential direction of the pile body 2, and Since it is formed along the longitudinal direction, it is ejected radially over the entire circumference of the pile main body 2 in the longitudinal direction and hardens, thereby constructing a pile foundation C that is integrated with the pile main body 2.
このような杭基礎の構築方法によれば、例えば薬液注入
による地盤改良法や場所打ちコンクリート杭による杭基
礎の施工方法に比し、極めて能率的に杭基礎を構築する
ことができ、しかも、杭本体２に圧入する根固め液の量
を変えることによって、杭基礎の大きさを任意に調整す
ることができるので、種々の地盤への適用性が向上する
。また、杭本体２もその先端に錐状の頭部２ａが取り付
けられていて、地盤ｌに容易に貫入させられるので、現
場での施工が面倒になることがなく、その作業性を向上
することができる。According to such a method of constructing a pile foundation, it is possible to construct a pile foundation extremely efficiently compared to, for example, a soil improvement method using chemical injection or a method of constructing a pile foundation using cast-in-place concrete piles. The size of the pile foundation can be arbitrarily adjusted by changing the amount of foot hardening liquid press-fitted into the main body 2, thereby improving applicability to various types of ground. In addition, the pile body 2 also has a conical head 2a attached to its tip and can be easily penetrated into the ground l, so that construction on site is not troublesome and work efficiency is improved. I can do it.
第５図および第６図は、それぞれこのような杭基礎の構
築方法を実施する際に用いて好適な杭本体の例を示すも
のである。FIG. 5 and FIG. 6 respectively show examples of pile bodies suitable for use when carrying out such a method of constructing a pile foundation.
第５図に示す杭本体２は、鋼製円筒状の周壁部２ｂと、
この筒体部２ｂの先端に嵌め込まれる錐状の頭部２ａと
を主体として構成されており、また、前記周壁部２ｂに
は、いわゆる千鳥状に根固め液を噴出させるための貫通
孔２Ｃが形成されている。なお、周壁部２ｂの外径りは
住宅用の基礎として考慮した場合には、たとえば４８．
５〜２００ｍｍ程度のもので良く、地盤１の性状や上部
建築物の大きさ等を配慮して適宜のものが選択される。The pile main body 2 shown in FIG. 5 includes a steel cylindrical peripheral wall portion 2b,
It is mainly composed of a conical head 2a that is fitted into the tip of the cylindrical body 2b, and the peripheral wall 2b is provided with through holes 2C for spouting the root hardening liquid in a so-called staggered pattern. It is formed. In addition, when considering the outer diameter of the peripheral wall portion 2b as a foundation for a house, the outer diameter is, for example, 48.
It may be about 5 to 200 mm, and an appropriate one is selected taking into consideration the properties of the ground 1, the size of the upper building, etc.
杭本体２をこのような構成とした場合には、地盤１への
貫入、設置作業を、容易に実施でき、また、全体を鋼製
とすることによって、杭基礎の強度を向上することがで
きるとともに、コストも低減することができるといった
長所がある。When the pile main body 2 has such a configuration, penetration into the ground 1 and installation work can be carried out easily, and the strength of the pile foundation can be improved by making the entire pile made of steel. At the same time, it also has the advantage of being able to reduce costs.
第６図は杭本体２の他の例を示す゛もので、この例では
、周壁部２ｂに形成した貫通孔２ｃの大きさを、頭部２
ａ付近のものを小径に基部付近のものを大径にそれぞれ
形成したことを特徴とするもので、杭基礎の下端を球根
状に大きく形成しようとするものである。FIG. 6 shows another example of the pile main body 2. In this example, the size of the through hole 2c formed in the peripheral wall portion 2b is
The pile foundation is characterized by having a small diameter near the base and a large diameter near the base, and is intended to form the lower end of the pile foundation into a large bulbous shape.
なお、前記例において示した杭本体２の形状や寸法等は
一例であって、適用する地盤の性状や杭基礎の設計要求
に基づき種々変更可能である。Note that the shape, dimensions, etc. of the pile body 2 shown in the above example are merely examples, and can be variously changed based on the properties of the applied ground and the design requirements of the pile foundation.
「発明の効果」
以上説明したように本発明の杭基礎の構築方法は、中空
筒状で先端に錐状の頭部を有する杭本体の周壁部に杭本
体の内外に連通ずる複数の貫通孔を杭本体のの周方向に
間隔を開けかつ長手方向に沿って複数形成しておき、こ
の杭本体を、その頭部を下にして衝撃もしくは押し込み
によって地中に貫入、設置するとともに、地中に設置し
た杭本体の上端開口に根固め液の供給管を連結した後、
杭本体の中空部に根固め液を圧入することによって杭本
体の貫通孔より根固め液を噴出させ、杭本体の周囲で根
固め液を硬化させることを特徴とするものであるから、
簡単な施工で杭基礎を構築し得て、軟弱地盤等の地業を
行うことができ、コスト低下を図ることのできる
また、杭本体に注入する根固め液の圧力を変えると、そ
の圧力によって根固め液の噴出力が変わるため、根固め
液によって押し退けられる部分の大きさが変わり、この
結果、杭の大きさを任意に調整することが可能になると
いった効果もある。"Effects of the Invention" As explained above, the method for constructing a pile foundation of the present invention has a plurality of through holes communicating with the inside and outside of the pile body in the peripheral wall of the pile body, which has a hollow cylindrical shape and has a conical head at the tip. A plurality of pile bodies are formed at intervals in the circumferential direction of the pile body and along the longitudinal direction, and the pile body is penetrated and installed into the ground by impact or pushing with its head facing down. After connecting the supply pipe for the root hardening solution to the upper opening of the pile body installed in the
The method is characterized in that by pressurizing the root hardening liquid into the hollow part of the pile body, the root hardening liquid is ejected from the through hole of the pile body, and the foot hardening liquid is hardened around the pile body.
Pile foundations can be constructed with simple construction, making it possible to work on soft ground, etc., and reducing costs.Also, by changing the pressure of the foot hardening solution injected into the pile body, the pressure Since the ejection force of the root hardening liquid changes, the size of the area that is displaced by the root hardening liquid changes, and as a result, there is the effect that the size of the pile can be adjusted arbitrarily.
第１図ないし第６図は本発明の一実施例を示すもので、
第１図ないし第４図はそれぞれ本発明方法の工程を示す
断面図、第５図は本発明方法に適用される杭本体の一橋
造例を示す一部切欠断面図、第６図は本発明方法に適用
される杭本体の他の構造例を示す一部切欠断面図である
。
■・・・・・地盤、
１ａ・・・・・・軟弱地盤、１ｂ・・・・・・岩盤、２
・・・・・・杭本体、２ａ・・・・・・頭部、２ｂ・・
・・・・周壁部、３・、・・・・・供給装置、３ａ・・
・供給管、３ｂ・・・・・・タンク、３ｃ・・・・ポン
プ。1 to 6 show an embodiment of the present invention,
Figures 1 to 4 are cross-sectional views showing the steps of the method of the present invention, Figure 5 is a partially cutaway cross-sectional view showing an example of Hitotsubashi construction of the pile body applied to the method of the present invention, and Figure 6 is a cross-sectional view of the method of the present invention. It is a partially cutaway sectional view showing another example of the structure of the pile main body applied to the method. ■...Ground, 1a...Soft ground, 1b...Bedrock, 2
...Pile body, 2a...Head, 2b...
... Peripheral wall portion, 3... Supply device, 3a...
- Supply pipe, 3b...Tank, 3c...Pump.
Claims (1)
杭本体の内外に連通する複数の貫通孔を杭本体の周方向
に間隔を開けかつ長手方向に沿って複数形成しておき、
この杭本体を、その頭部を下にして衝撃もしくは押し込
みによって地中に貫入、設置するとともに、地中に設置
した杭本体の上端開口に根固め液の供給管を連結した後
、杭本体の中空部に根固め液を圧入することによって杭
本体の貫通孔より根固め液を噴出させ、杭本体の周囲で
根固め液を硬化させることを特徴とする杭基礎の構築方
法。A plurality of through holes communicating with the inside and outside of the pile body are formed at intervals in the circumferential direction of the pile body and along the longitudinal direction in the peripheral wall of the pile body, which has a hollow cylindrical shape and has a conical head at the tip. Ok,
This pile body is penetrated and installed into the ground by impact or pushing with its head facing down, and after connecting a supply pipe for the soil hardening solution to the upper end opening of the pile body installed in the ground, A method for constructing a pile foundation, characterized by squirting the root hardening liquid from a through hole in the pile body by forcing the foot hardening liquid into the hollow part, and hardening the foot hardening liquid around the pile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096648A JP2542694B2 (en) | 1989-04-17 | 1989-04-17 | How to build a pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096648A JP2542694B2 (en) | 1989-04-17 | 1989-04-17 | How to build a pile foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02274923A true JPH02274923A (en) | 1990-11-09 |
| JP2542694B2 JP2542694B2 (en) | 1996-10-09 |
Family
ID=14170648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1096648A Expired - Lifetime JP2542694B2 (en) | 1989-04-17 | 1989-04-17 | How to build a pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2542694B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51105106A (en) * | 1975-03-12 | 1976-09-17 | Sanwa Setsubi Kogyo Kk | JIBANKYOKAKUI |
| JPS54132310A (en) * | 1978-04-05 | 1979-10-15 | Oyama Akihiro | Pile that can inject grout |
| JPS61109822A (en) * | 1984-11-05 | 1986-05-28 | Mitsubishi Heavy Ind Ltd | Construction work of pile |
-
1989
- 1989-04-17 JP JP1096648A patent/JP2542694B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51105106A (en) * | 1975-03-12 | 1976-09-17 | Sanwa Setsubi Kogyo Kk | JIBANKYOKAKUI |
| JPS54132310A (en) * | 1978-04-05 | 1979-10-15 | Oyama Akihiro | Pile that can inject grout |
| JPS61109822A (en) * | 1984-11-05 | 1986-05-28 | Mitsubishi Heavy Ind Ltd | Construction work of pile |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2542694B2 (en) | 1996-10-09 |
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