JP6630616B2 - Pile formation method, pile - Google Patents

Pile formation method, pile Download PDF

Info

Publication number
JP6630616B2
JP6630616B2 JP2016077144A JP2016077144A JP6630616B2 JP 6630616 B2 JP6630616 B2 JP 6630616B2 JP 2016077144 A JP2016077144 A JP 2016077144A JP 2016077144 A JP2016077144 A JP 2016077144A JP 6630616 B2 JP6630616 B2 JP 6630616B2
Authority
JP
Japan
Prior art keywords
pile
cushioning material
forming
hole
outside
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.)
Active
Application number
JP2016077144A
Other languages
Japanese (ja)
Other versions
JP2017186820A (en
Inventor
忠博 渡邊
忠博 渡邊
章 宮田
章 宮田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kajima Corp
Original Assignee
Kajima Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kajima Corp filed Critical Kajima Corp
Priority to JP2016077144A priority Critical patent/JP6630616B2/en
Publication of JP2017186820A publication Critical patent/JP2017186820A/en
Application granted granted Critical
Publication of JP6630616B2 publication Critical patent/JP6630616B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Piles And Underground Anchors (AREA)
  • Foundations (AREA)

Description

本発明は、杭の形成方法、および杭に関する。   The present invention relates to a pile forming method and a pile.

都市部で建築物の建て替えを行う際、既存躯体の地下部分の底部スラブよりも新設躯体の地下部分を浅くし、既存躯体内に収まるようにして経済的な計画とするケースがある。   When rebuilding a building in an urban area, there is a case where an underground portion of a newly-constructed skeleton is made shallower than a bottom slab of an underground portion of an existing skeleton, so that the slab can be accommodated in the existing skeleton to make an economic plan.

新設躯体を支持するため、既存躯体を貫通する杭を新たに設ける場合、この新設杭と既存躯体が接触すると杭体に過大な曲げモーメントおよびせん断力が発生することから、杭の品質を確保するために既存躯体と新設杭の取合い部分を絶縁し、構造的な干渉を避ける必要がある。例えば特許文献１、２には、新設杭と既存躯体のスラブの間の縁を切ることが記載されている。   If a new pile is installed to penetrate the existing skeleton to support the new skeleton, contact between the new stake and the existing skeleton will generate an excessive bending moment and shear force on the pile, thus ensuring the quality of the pile. For this purpose, it is necessary to insulate the connection between the existing building and the new pile to avoid structural interference. For example, Patent Literatures 1 and 2 disclose cutting an edge between a new pile and a slab of an existing skeleton.

特開2000-154549号公報JP 2000-154549 A 特開平10-317487号公報JP 10-317487 A

上記のようなケースにおける従来の絶縁作業は、既存躯体の解体時および新設杭の施工時において取合い部分が露出状態で、作業者が取合い部分で直接的な作業をできる場合に行われており、そのような作業ができない場合には施工が困難になる。   Conventional insulation work in the above cases, when dismantling of the existing skeleton and construction of the new pile, the joint is exposed when the worker is able to work directly at the joint, If such work is not possible, construction becomes difficult.

例えば地下水位が取合い部分より高い場合は、取合い部分の水没を避けて露出させるため、地下水位を下げるか遮水した空間を確保する必要があり手間やコストが掛かる。また既存躯体を解体した後新設杭の施工前に地下部分の埋戻しを行う場合も、取合い部分が露出した作業空間を確保する必要があり同様の問題がある。   For example, when the groundwater level is higher than the connection part, it is necessary to lower the groundwater level or to secure a shielded space in order to avoid the submergence of the connection part and to expose the connection part, which is troublesome and costly. In addition, when backfilling the underground part after dismantling the existing skeleton and before constructing the new pile, it is necessary to secure a work space where the joint part is exposed, and there is a similar problem.

本発明は上記の問題に鑑みてなされたものであり、既存躯体と新設杭の取合い部分を容易に絶縁できる杭の形成方法等を提供することを目的とする。   The present invention has been made in view of the above-described problems, and has as its object to provide a method of forming a pile that can easily insulate a connection portion between an existing building and a newly-installed pile.

前述した課題を解決するための第１の発明は、既存躯体を貫通する杭を地盤に形成する際に、前記杭の形成に用いる部材であって緩衝材が予め取付けられた部材を、前記既存躯体と前記地盤で連続する孔に配置し、前記緩衝材を、前記杭の外側に対応する位置且つ前記既存躯体に対応する高さに配置することを特徴とする杭の形成方法である。   A first aspect of the present invention for solving the above-mentioned problem is that, when a pile penetrating an existing skeleton is formed on the ground, a member used for forming the pile and a member to which a cushioning material is attached in advance is replaced with the existing one. A method for forming a pile, wherein the pile is arranged in a hole continuous between a skeleton and the ground, and the cushioning material is arranged at a position corresponding to the outside of the pile and at a height corresponding to the existing skeleton.

本発明では、上記の手順により、予め絶縁用の緩衝材を取付けた部材を孔に配置することで、杭の形成時に当該杭の外側に対応する位置且つ既存躯体に対応する高さに緩衝材を配置できる。従って、前記のように直接的な作業ができない場合でも、取合い部分を露出させるための手間やコストが掛からず、作業を容易に行うことができる。   According to the present invention, by placing the member in which the cushioning material for insulation is attached in advance in the hole by the above procedure, the cushioning material is formed at a position corresponding to the outside of the pile and at a height corresponding to the existing frame when the pile is formed. Can be arranged. Therefore, even when the direct work cannot be performed as described above, the work and the cost for exposing the connecting portion are not required, and the work can be easily performed.

前記緩衝材は、前記杭の周りを囲う形状のものであることが望ましい。
これにより、杭の全周に渡って絶縁を行うことができる。 It is preferable that the cushioning material has a shape surrounding the pile.
Thereby, insulation can be performed over the entire circumference of the pile.

前記部材は鉄筋籠であり、外側に前記緩衝材が取付けられた前記鉄筋籠を前記孔に挿入した後、前記孔にコンクリートを打設することが望ましい。
これにより、鉄筋コンクリートによる杭を形成する際に、緩衝材を適切な位置に配置して絶縁を好適に行うことができる。 The member is a steel cage, and it is preferable that after inserting the steel cage with the cushioning material attached to the outside into the hole, concrete is poured into the hole.
Thereby, when forming a stake made of reinforced concrete, the cushioning material can be arranged at an appropriate position and insulation can be suitably performed.

前記緩衝材は、前記鉄筋籠の外側に取付けた鋼板の外側に設けられることが望ましい。
この場合、緩衝材の取付けに用いる鋼板によって杭の補強を行うことが可能である。そのため、前記の手法により緩衝材を配置することで杭の断面欠損が生じる場合にも、杭径を大きくする必要が無い。 It is preferable that the cushioning material is provided outside a steel plate attached outside the reinforcing bar cage.
In this case, it is possible to reinforce the pile with a steel plate used for mounting the cushioning material. Therefore, even when the cross section of the pile is lost due to the arrangement of the cushioning material by the above-described method, it is not necessary to increase the pile diameter.

前記部材はケーシングであり、内周面に沿って前記緩衝材が取付けられた前記ケーシングを前記孔に配置した後、前記孔にコンクリートを打設し、前記緩衝材は前記高さとしたまま前記ケーシングを引上げることも望ましい。
このように、ケーシングに緩衝材を取付けることでも、コンクリートによる杭を形成する際に、緩衝材を適切な位置に配置して絶縁を好適に行うことができる。 The member is a casing, and after arranging the casing to which the cushioning material is attached along the inner peripheral surface in the hole, concrete is poured into the hole, and the casing is kept at the same height as the casing. It is also desirable to raise
Thus, even when the cushioning material is attached to the casing, the insulation can be suitably performed by arranging the cushioning material at an appropriate position when forming the concrete pile.

また、前記部材はコンクリート製の既製杭であり、外側に前記緩衝材が取付けられた前記既製杭を前記孔に挿入することも望ましい。あるいは、前記部材は鋼管であり、外側に前記緩衝材が取付けられた前記鋼管を前記孔に挿入することも望ましい。
これにより、既製杭や鋼管を用いて杭を形成する際に、緩衝材を適切な位置に配置して絶縁を好適に行うことができる。 Further, the member is a ready-made pile made of concrete, and it is preferable that the ready-made pile having the cushioning material attached outside is inserted into the hole. Alternatively, it is preferable that the member is a steel pipe, and the steel pipe having the cushioning material attached outside is inserted into the hole.
Thereby, when forming a pile using a ready-made pile or a steel pipe, it is possible to suitably perform insulation by arranging the cushioning material at an appropriate position.

第２の発明は、既存躯体を貫通して地盤に形成されたコンクリートによる杭であって、前記杭の外側の前記既存躯体に対応する高さに断面欠損部を有し、前記断面欠損部に緩衝材が配置されていることを特徴とする杭である。   A second invention is a pile made of concrete formed on the ground by penetrating an existing skeleton, having a cross-section defect at a height corresponding to the existing skeleton outside the pile, and A pile in which a cushioning material is arranged.

本発明により、既存躯体と新設杭の取合い部分を容易に絶縁できる杭の形成方法等を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the formation method of the pile etc. which can easily insulate the connection part of an existing building and a newly installed pile can be provided.

杭の形成方法について説明する図Diagram explaining the method of forming piles 緩衝材５を取付けた鉄筋籠１０を示す図The figure which shows the rebar basket 10 with which the buffer material 5 was attached. 杭の形成方法について説明する図Diagram explaining the method of forming piles 杭の形成方法について説明する図Diagram explaining the method of forming piles 緩衝材５を鋼板１５ａを用いて鉄筋籠１０に取付けた例Example in which the cushioning material 5 is attached to the reinforcing bar cage 10 using the steel plate 15a 緩衝材５をケーシング２０に取付けた例Example in which cushioning material 5 is attached to casing 20 緩衝材５を既製杭４０および鋼管５０に取付けた例Example in which cushioning material 5 is attached to ready-made pile 40 and steel pipe 50

以下、図面に基づいて本発明の好適な実施形態について詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[第１の実施形態]
本発明の第１の実施形態に係る杭の形成方法について図１〜４等を参照して説明する。本実施形態に係る杭の形成方法は、既存躯体の地下部分の耐圧盤（底部スラブ）の上方に新設躯体を構築する際に、新設躯体を支持する杭を当該耐圧盤を貫通して地盤に形成する例であり、この時、耐圧盤と新設杭の取合い部分を絶縁するものである。 [First Embodiment]
A method for forming a pile according to the first embodiment of the present invention will be described with reference to FIGS. The method of forming a pile according to the present embodiment is such that, when constructing a new skeleton above a pressure plate (bottom slab) in an underground portion of an existing skeleton, a pile supporting the new skeleton is penetrated through the pressure plate to the ground. This is an example of forming, and at this time, the joint between the pressure plate and the newly installed pile is insulated.

本実施形態では、上記の杭を形成する際に、まず図１に示すように、既存躯体の耐圧盤２を解体した後、耐圧盤２の上方を埋戻土４で埋戻し、所定位置で掘削を行って埋戻土４、耐圧盤２、地盤３の間で連続する孔３０を形成する。図１の２０は孔３０の掘削時の孔壁保護に用いる筒状のケーシング２０である。   In this embodiment, when the above-mentioned pile is formed, first, as shown in FIG. 1, the pressure plate 2 of the existing frame is disassembled, and the upper part of the pressure plate 2 is backfilled with the backfill soil 4, and at a predetermined position. Excavation is performed to form a continuous hole 30 between the backfill soil 4, the pressure plate 2, and the ground 3. Reference numeral 20 in FIG. 1 denotes a cylindrical casing 20 used for protecting a hole wall when the hole 30 is excavated.

次に、図２に一部を示す鉄筋籠１０（杭の形成に用いる部材）を、図３に示すように孔３０の内側のケーシング２０内に挿入して配置する。図２に示すように鉄筋籠１０には絶縁用の緩衝材５が予め取付けられており、鉄筋籠１０の挿入時に、緩衝材５が、杭の外側の、杭の外周部に対応する平面位置且つ耐圧盤２に対応する高さに配置されるようにする。   Next, the rebar basket 10 (a member used for forming a pile), a part of which is shown in FIG. 2, is inserted and arranged in the casing 20 inside the hole 30 as shown in FIG. As shown in FIG. 2, the cushioning material 5 for insulation is previously attached to the reinforcing cage 10, and when the reinforcing cage 10 is inserted, the cushioning material 5 is placed on the outside of the pile, in a plane position corresponding to the outer periphery of the pile. In addition, it is arranged at a height corresponding to the pressure plate 2.

鉄筋籠１０は、周方向に間隔を空けて配置した主筋１１の周囲に環状のフープ筋１２を設けたものであり、緩衝材５は鉄筋籠１０の外周部に沿って鉄筋籠１０の外側に筒状に取付けられる。   The reinforcing bar cage 10 is provided with an annular hoop bar 12 around a main bar 11 arranged at intervals in the circumferential direction, and the cushioning material 5 extends outside the reinforcing bar cage 10 along the outer peripheral portion of the reinforcing bar cage 10. Installed in a tubular shape.

図３に示すように、鉄筋籠１０では、上下のフープ筋１２に取付けた凸状の取付具１４を用いて、鉄筋籠１０の外周部に沿った筒状の取付板１５が鉄筋籠１０の外側に取付けられる。緩衝材５は取付板１５の外側に設けられ、取付板１５により緩衝材５の形状が保持できる。緩衝材５は、周囲に結束バンド（不図示）を巻いたりビス止め等を行うことにより、取付板１５に取付けられる。   As shown in FIG. 3, in the reinforcing bar cage 10, a cylindrical mounting plate 15 along the outer peripheral portion of the reinforcing bar cage 10 is attached to the reinforcing bar cage 10 by using convex fittings 14 mounted on the upper and lower hoop bars 12. Mounted on the outside. The cushioning material 5 is provided outside the mounting plate 15, and the shape of the cushioning material 5 can be held by the mounting plate 15. The cushioning member 5 is attached to the attachment plate 15 by wrapping a binding band (not shown) around the periphery or performing screwing or the like.

緩衝材５には、強度が低く（例えば圧縮強度が杭のコンクリートの1/10程度）且つ空隙を有し、耐圧盤２の接触時に容易に凹むことができる素材が用いられる。このような素材としては、例えばスポンジ状のゴムや発泡スチロールなどの発泡材がある。   The cushioning material 5 is made of a material having a low strength (for example, the compressive strength is about 1/10 of that of the concrete of the pile), having a gap, and which can be easily dented when the pressure platen 2 comes into contact. Examples of such a material include foam materials such as sponge-like rubber and styrene foam.

杭の形成方法の説明に戻る。本実施形態では、図３の状態から、孔３０の内側にコンクリートを打設する。コンクリートは孔３０の底部から上方へと充填されてゆき、これに伴いケーシング２０は引上げる。緩衝材５がケーシング２０の内周面に押さえられ収縮した状態で配置されるようにしておけば、ケーシング２０の引上げによってケーシング２０の下端が緩衝材５よりも高い位置になると緩衝材５が外方に膨張し、緩衝材５の外側にコンクリートが回り込むのが防止できる。   Return to the description of the method of forming the pile. In this embodiment, concrete is cast inside the hole 30 from the state of FIG. The concrete is filled upward from the bottom of the hole 30, and the casing 20 is pulled up accordingly. If the cushioning member 5 is arranged so as to be pressed and shrunk by the inner peripheral surface of the casing 20, the cushioning member 5 is removed when the lower end of the casing 20 is positioned higher than the cushioning member 5 by pulling up the casing 20. This prevents the concrete from expanding toward the outside and going around the outside of the cushioning material 5.

こうして図４に示すように鉄筋コンクリート製の杭１が形成される。緩衝材５は、杭１の外周部に沿って杭１の外側にできる周方向の断面欠損部１０１に配置され、この断面欠損部１０１および緩衝材５は耐圧盤２に対応する高さにある。緩衝材５は杭１の周りを囲う筒状の形状を有し、杭１の周方向に沿って配置されるので、杭１の全周に渡って耐圧盤２との干渉を防ぐことができる。杭１は、断面欠損部１０１によって杭１の耐力が低下する分、その杭径を大きく設計しておく。また本実施形態では、施工時の誤差を考慮して緩衝材５の上下のサイズを耐圧盤２の厚さより大きくしている。   Thus, a reinforced concrete pile 1 is formed as shown in FIG. The cushioning material 5 is arranged in a circumferential cross-section defect 101 formed outside the pile 1 along the outer periphery of the pile 1, and the cross-section defect 101 and the cushioning material 5 are at a height corresponding to the pressure platen 2. . The buffer material 5 has a cylindrical shape surrounding the pile 1 and is arranged along the circumferential direction of the pile 1, so that interference with the pressure-resistant panel 2 can be prevented over the entire circumference of the pile 1. . The pile diameter of the pile 1 is designed to be large as the proof strength of the pile 1 is reduced by the cross-section defect portion 101. Further, in the present embodiment, the upper and lower sizes of the cushioning material 5 are made larger than the thickness of the pressure-resistant board 2 in consideration of an error at the time of construction.

以上説明したように、本実施形態によれば、鉄筋コンクリートによる杭１を形成する際に、上記の手順により、予め絶縁用の緩衝材５を外側に取付けた鉄筋籠１０を孔３０に配置することで、緩衝材５を杭１の外側に対応する位置且つ既存躯体の耐圧盤２に対応する高さに適切に配置できる。従って、前記のように直接的な作業ができない場合でも、取合い部分を露出させるための手間やコストが掛からず、作業を容易に行うことができる。また緩衝材５は、杭１の周りを囲うものなので、杭１の全周に渡って絶縁を行うことができる。   As described above, according to the present embodiment, when forming the stake 1 made of reinforced concrete, the reinforced cage 10 to which the cushioning material 5 for insulation is previously mounted is arranged in the hole 30 by the above procedure. Thus, the cushioning material 5 can be appropriately arranged at a position corresponding to the outside of the pile 1 and at a height corresponding to the pressure plate 2 of the existing frame. Therefore, even when the direct work cannot be performed as described above, the work and the cost for exposing the connecting portion are not required, and the work can be easily performed. Further, since the cushioning material 5 surrounds the periphery of the pile 1, insulation can be performed over the entire circumference of the pile 1.

しかしながら、本発明はこれに限らない。例えば図５に示すように、取付板１５の代わりに十分な強度と厚みを有する鉄板等の鋼板１５ａを用いることもできる。鋼板１５ａは前記の取付板１５と同様、鉄筋籠１０の外周部に沿って鉄筋籠１０の外側に筒状に取付けられ、その外側に緩衝材５が設けられる。なお、図５の例では鋼板１５ａの上下端が外方に折れ曲がっており、コンクリートの緩衝材５側への回り込みが防止できるようになっている。図５の例では鋼板１５ａの上下端が斜め方向に曲がっているが、これを９０°直角に外方に折り曲げることも可能である。ただし、これらは必須ではなく、前記の図３等に示す取付板１５と同様、その上下端を曲げず、直線状とすることもできる。   However, the present invention is not limited to this. For example, as shown in FIG. 5, a steel plate 15a such as an iron plate having sufficient strength and thickness can be used in place of the mounting plate 15. The steel plate 15a is attached to the outside of the reinforcing bar cage 10 in a cylindrical shape along the outer peripheral portion of the reinforcing bar cage 10 like the mounting plate 15, and the cushioning material 5 is provided on the outside thereof. In the example shown in FIG. 5, the upper and lower ends of the steel plate 15a are bent outward, so that the concrete can be prevented from wrapping around the cushioning material 5. In the example of FIG. 5, the upper and lower ends of the steel plate 15a are bent in an oblique direction, but it is also possible to bend this outward at a right angle of 90 °. However, these are not essential and, like the mounting plate 15 shown in FIG. 3 and the like described above, the upper and lower ends thereof may be straight without being bent.

この場合も前記と同様の手順で杭を形成することができ、このとき鋼板１５ａによって杭の補強を行うことが可能である。そのため、杭に断面欠損部が生じて耐力が低下する場合にも、前記のように杭径を大きくする必要が無い。   In this case, the pile can be formed in the same procedure as described above, and at this time, the pile can be reinforced by the steel plate 15a. Therefore, even when the cross-section defect occurs in the pile and the proof stress is reduced, it is not necessary to increase the pile diameter as described above.

以下、本発明の別の例について、第２、第３の実施形態として説明する。各実施形態は第１の実施形態と異なる点について主に説明し、同様の点については図等で同じ符号を付すなどして説明を省略する。   Hereinafter, another example of the present invention will be described as second and third embodiments. Each embodiment will be described mainly with respect to differences from the first embodiment, and the same points will be denoted by the same reference numerals in the drawings and the like, and description thereof will be omitted.

[第２の実施形態]
図６は第２の実施形態に係る杭の形成方法について示す図である。本実施形態では、孔３０の掘削を行うとともに、図６（ａ）に示すように、予め内周面に沿って緩衝材５を取付けたケーシング２０（杭の形成に用いる部材）を孔３０に挿入して配置し、杭の外側の、杭の外周部に対応する平面位置且つ既存躯体の耐圧盤２に対応する高さに緩衝材５を配置する。緩衝材５は、磁石等によってケーシング２０に対し摺動可能に取付けられている。 [Second embodiment]
FIG. 6 is a diagram illustrating a method for forming a pile according to the second embodiment. In the present embodiment, the hole 30 is excavated, and the casing 20 (a member used for forming the pile) to which the cushioning material 5 is attached in advance along the inner peripheral surface is inserted into the hole 30 as shown in FIG. The cushioning member 5 is inserted and arranged, and the cushioning material 5 is arranged at a plane position corresponding to the outer peripheral portion of the pile and at a height corresponding to the pressure plate 2 of the existing frame. The cushioning member 5 is slidably attached to the casing 20 by a magnet or the like.

この後図６（ｂ）に示すように、前記と同様、鉄筋籠１０をケーシング２０内に挿入し、孔３０内にコンクリートを打設しつつ、ケーシング２０を引上げることで杭が形成される。鉄筋籠１０のフープ筋１２には押さえ材１６が取付けられており、ケーシング２０の引上げ時には、この押さえ材１６で緩衝材５を上から押さえることで、ケーシング２０とともに緩衝材５が上昇するのが防止され、緩衝材５を上記の高さに配置したままとできる。   Thereafter, as shown in FIG. 6B, similarly to the above, the pile is formed by inserting the reinforced cage 10 into the casing 20, placing concrete in the hole 30, and pulling up the casing 20. . A holding member 16 is attached to the hoop bar 12 of the reinforcing bar cage 10, and when the casing 20 is pulled up, the buffer member 5 is pressed from above by the holding member 16 so that the cushioning member 5 rises together with the casing 20. This prevents the cushioning material 5 from being placed at the above-mentioned height.

これによっても、コンクリートによる杭を形成する際に、緩衝材５を適切な位置に配置して絶縁を好適に行うことができ、第１の実施形態と同様の効果が得られる。また、第２の実施形態ではケーシング２０の連続した内周面に沿って緩衝材５を取付けることができるので、緩衝材５の取付けが容易である利点もある。   Also in this case, when forming a pile made of concrete, the cushioning material 5 can be arranged at an appropriate position to appropriately perform insulation, and the same effect as in the first embodiment can be obtained. Further, in the second embodiment, since the cushioning member 5 can be attached along the continuous inner peripheral surface of the casing 20, there is an advantage that the attachment of the cushioning member 5 is easy.

[第３の実施形態]
次に、鉄筋籠１０を用いずに杭を形成する例について、第３の実施形態として説明する。 [Third embodiment]
Next, an example of forming a pile without using the reinforcing cage 10 will be described as a third embodiment.

図７（ａ）は、コンクリート製の筒状の既製杭４０を孔３０に挿入して配置し、杭を形成する例である。この際、予め既製杭４０（杭の形成に用いる部材）の外周部に沿って既製杭４０の外側に筒状に緩衝材５を取付けておき、既製杭４０の挿入時に、杭の外側の、杭の外周部に対応する平面位置且つ耐圧盤２に対応する高さに緩衝材５が配置されるようにする。   FIG. 7A shows an example in which a ready-made concrete pile 40 is inserted into the hole 30 and arranged to form a pile. At this time, the cushioning material 5 is attached to the outside of the ready-made stake 40 in a tubular shape along the outer periphery of the ready-made stake 40 (member used for forming the stake) in advance, and when the ready-made stake 40 is inserted, The cushioning material 5 is arranged at a plane position corresponding to the outer peripheral portion of the pile and at a height corresponding to the pressure platen 2.

一方、図７（ｂ）は、鋼管杭を形成する際に、筒状の鋼管５０（杭の形成に用いる部材）を孔３０に挿入して配置する例である。この際も、予め鋼管５０の外周部に沿って鋼管５０の外側に筒状に緩衝材５を取付けておき、鋼管５０の挿入時に、鋼管杭の外側の、鋼管杭の外周部に対応する平面位置且つ耐圧盤２に対応する高さに緩衝材５が配置されるようにする。鋼管５０内には必要に応じてコンクリート等が充填される。   On the other hand, FIG. 7B shows an example in which a tubular steel pipe 50 (a member used for forming the pile) is inserted into the hole 30 and arranged when forming the steel pipe pile. Also in this case, the cushioning material 5 is attached to the outside of the steel pipe 50 in a cylindrical shape along the outer periphery of the steel pipe 50 in advance, and when the steel pipe 50 is inserted, a plane corresponding to the outer periphery of the steel pipe pile is provided outside the steel pipe pile. The cushioning material 5 is arranged at a position and at a height corresponding to the pressure-resistant board 2. The steel pipe 50 is filled with concrete or the like as necessary.

これらの例でも、既製杭４０や鋼管５０を用いて杭を形成する場合に、緩衝材５を適切な位置に配置して絶縁を好適に行うことができ、第１の実施形態と同様の効果が得られる。   Also in these examples, when the pile is formed using the ready-made pile 40 or the steel pipe 50, the cushioning material 5 can be disposed at an appropriate position to appropriately perform insulation, and the same effect as in the first embodiment can be obtained. Is obtained.

なお、これらの例において、緩衝材５は杭の周方向に沿って配置した筒状のものであるが、必ずしもこれに限らない。例えば、孔３０の平面形状など場合によっては、上記した手法によって、円形平面を有する杭の外側に、その周りを囲うように略ロの字形の平面形状を有する緩衝材５を配置することも可能である。   In addition, in these examples, although the cushioning material 5 is a cylindrical thing arrange | positioned along the circumferential direction of a pile, it is not necessarily limited to this. For example, in some cases, such as the plane shape of the hole 30, the cushioning material 5 having a substantially square-shaped plane shape can be arranged outside the pile having a circular plane by the above-described method so as to surround the periphery thereof. It is.

以上、添付図面を参照して、本発明の好適な実施形態について説明したが、本発明は係る例に限定されない。当業者であれば、本願で開示した技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be made within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. I understand.

１；杭
２；耐圧盤
３；地盤
４；埋戻土
５；緩衝材
１０；鉄筋籠
１１；主筋
１２；フープ筋
１４；取付具
１５；取付板
１６；押さえ板
１５ａ；鋼板
２０；ケーシング
３０；孔
４０；既製杭
５０；鋼管 1; pile 2; pressure plate 3; ground 4; backfill soil 5; cushioning material 10; reinforcing rod cage 11; main reinforcement 12; hoop reinforcement 14; mounting fixture 15; mounting plate 16; holding plate 15a; Hole 40; ready-made pile 50; steel pipe

Claims (8)

既存躯体を貫通する杭を地盤に形成する際に、前記杭の形成に用いる部材であって緩衝材が予め取付けられた部材を、前記既存躯体と前記地盤で連続する孔に配置し、前記緩衝材を、前記杭の外側に対応する位置且つ前記既存躯体に対応する高さに配置することを特徴とする杭の形成方法。   When forming a pile that penetrates the existing skeleton on the ground, a member that is used for forming the pile and to which a cushioning material is attached in advance is arranged in a hole that is continuous with the existing skeleton and the ground. A method of forming a pile, comprising placing a material at a position corresponding to the outside of the pile and at a height corresponding to the existing frame. 前記緩衝材は、前記杭の周りを囲う形状のものであることを特徴とする請求項１記載の杭の形成方法。   The method according to claim 1, wherein the cushioning member has a shape surrounding the pile. 前記部材は鉄筋籠であり、
外側に前記緩衝材が取付けられた前記鉄筋籠を前記孔に挿入した後、前記孔にコンクリートを打設することを特徴とする請求項１または請求項２記載の杭の形成方法。 The member is a reinforced cage,
The method for forming a pile according to claim 1, wherein after the reinforcing rod cage having the cushioning material attached to the outside is inserted into the hole, concrete is poured into the hole. 前記緩衝材は、前記鉄筋籠の外側に取付けた鋼板の外側に設けられることを特徴とする請求項３記載の杭の形成方法。   The pile forming method according to claim 3, wherein the cushioning material is provided outside a steel plate attached outside the reinforcing bar cage. 前記部材はケーシングであり、
内周面に沿って前記緩衝材が取付けられた前記ケーシングを前記孔に配置した後、前記孔にコンクリートを打設し、前記緩衝材は前記高さとしたまま前記ケーシングを引上げることを特徴とする請求項１または請求項２記載の杭の形成方法。 The member is a casing,
After arranging the casing to which the cushioning material is attached along the inner peripheral surface in the hole, concrete is poured into the hole, and the casing is pulled up while the cushioning material remains at the height. The method for forming a pile according to claim 1 or 2, wherein the pile is formed. 前記部材はコンクリート製の既製杭であり、
外側に前記緩衝材が取付けられた前記既製杭を前記孔に挿入することを特徴とする請求項１または請求項２記載の杭の形成方法。 The member is a ready-made pile made of concrete,
The method for forming a pile according to claim 1, wherein the ready-made pile to which the cushioning material is attached outside is inserted into the hole. 前記部材は鋼管であり、
外側に前記緩衝材が取付けられた前記鋼管を前記孔に挿入することを特徴とする請求項１または請求項２記載の杭の形成方法。 The member is a steel pipe,
The method for forming a pile according to claim 1 or 2, wherein the steel pipe having the cushioning material attached outside is inserted into the hole. 既存躯体を貫通して地盤に形成されたコンクリートによる杭であって、
前記杭の外側の前記既存躯体に対応する高さに断面欠損部を有し、
前記断面欠損部に緩衝材が配置されていることを特徴とする杭。 A concrete pile formed in the ground through the existing skeleton,
Having a cross-sectional defect at a height corresponding to the existing skeleton outside the pile,
A pile, wherein a cushioning material is arranged in the cross-section defect portion.
JP2016077144A 2016-04-07 2016-04-07 Pile formation method, pile Active JP6630616B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016077144A JP6630616B2 (en) 2016-04-07 2016-04-07 Pile formation method, pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016077144A JP6630616B2 (en) 2016-04-07 2016-04-07 Pile formation method, pile

Publications (2)

Publication Number Publication Date
JP2017186820A JP2017186820A (en) 2017-10-12
JP6630616B2 true JP6630616B2 (en) 2020-01-15

Family

ID=60043880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016077144A Active JP6630616B2 (en) 2016-04-07 2016-04-07 Pile formation method, pile

Country Status (1)

Country Link
JP (1) JP6630616B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112459073B (en) * 2020-11-17 2022-03-22 中国一冶集团有限公司 Anti-alignment offset mechanism for installing pile foundation engineering reinforcement cage for building

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3407168B2 (en) * 1995-08-24 2003-05-19 清水建設株式会社 Foundation of new building using existing pile foundation
JP2001182053A (en) * 1999-12-24 2001-07-03 Nishimatsu Constr Co Ltd Underground aseismatic reinforcing pile and foundation aseismatic structure
JP2010275708A (en) * 2009-05-26 2010-12-09 Takenaka Komuten Co Ltd Method for forming building
EP2831343B1 (en) * 2012-03-29 2016-12-21 Rockwool International A/S A pile grounded construction and a method for making such a construction
JP5955108B2 (en) * 2012-06-04 2016-07-20 大成建設株式会社 Pile reinforcement structure of existing building and its construction method
JP6229294B2 (en) * 2013-04-19 2017-11-15 株式会社大林組 Method of rebuilding a structure having an underground structure and underground structure
JP6209911B2 (en) * 2013-09-12 2017-10-11 株式会社大林組 Method of rebuilding a structure having an underground structure and underground structure

Also Published As

Publication number Publication date
JP2017186820A (en) 2017-10-12

Similar Documents

Publication Publication Date Title
JP5308116B2 (en) How to build a tunnel
KR200460186Y1 (en) Subterranean storage tank structure
JP2018159220A (en) Method of constructing underground structure, form and underground structure
JP4914062B2 (en) Two-tiered retaining wall and its construction method
JP2013002078A (en) Foundation structure
JP2013079511A (en) Construction method of earth-retaining timbering, and earth-retaining timbering
KR20090007826A (en) Process of blocking water penetration and blocking earth collapsing by using impermeable wall without strut
KR101674656B1 (en) CIP retaining wall with steel tube
JP5976373B2 (en) Pile foundation reinforcement structure and reinforcement method
JP6630616B2 (en) Pile formation method, pile
JP2017214722A (en) Construction method of base structure, and base structure
JP5457276B2 (en) Underground pillar construction
JP2008138488A (en) Construction method of underground structure, and underground structure
JP2018009336A (en) Underground space construction method
JP5367452B2 (en) Underground wall construction method and underground wall body
JP2016121511A (en) Underground structure
JP2019173476A (en) Pile head joint structure
KR101758987B1 (en) Landslide Protection Wall Construction Method Using PHC Pile and Anchor Bolt
KR20190084633A (en) Top-down construction method for concrete building structure using steel pile underground wall and shear support plate
JP2018009388A (en) End structure of preceding element and construction method of underground continuous wall
JP6186883B2 (en) Pile foundation structure and construction method of pile foundation structure
JP6006004B2 (en) Pile head space formation auxiliary tool, hollow ready-made pile provided with the same, pile head processing method using the hollow ready-made pile, and pile head space forming method
KR101886273B1 (en) Method and apparatus for forming basic support for fence installed in wall
JP2015190302A (en) Pile head base isolation joint structure
KR20140112822A (en) Double casing for construction of constinuous overlap pile wall and method for construction of constinuous overlap pile wall using the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20181217

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20191011

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20191203

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20191209

R150 Certificate of patent or registration of utility model

Ref document number: 6630616

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250