JPS61109826A - Reinforcing metal fitting for pile-foundation connection - Google Patents
Reinforcing metal fitting for pile-foundation connectionInfo
- Publication number
- JPS61109826A JPS61109826A JP23149684A JP23149684A JPS61109826A JP S61109826 A JPS61109826 A JP S61109826A JP 23149684 A JP23149684 A JP 23149684A JP 23149684 A JP23149684 A JP 23149684A JP S61109826 A JPS61109826 A JP S61109826A
- Authority
- JP
- Japan
- Prior art keywords
- foundation
- reinforcing
- joint
- horizontal
- vertical
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
Abstract
Description
【発明の詳細な説明】
（１）産業上の利用分野
本発明は地中に打込んだ鋼管杭（Ｓ杭）、鋼管巻コンク
リート杭（ＳＣ杭）、プレストレスコンクリート杭（Ｐ
Ｃ杭）、高強度ｐｃ杭（ＰＨＣ杭）等の基礎杭の上端部
に接合する鉄筋コンクリート建造物の基礎接合部に適用
する補強金具に関する。Detailed Description of the Invention (1) Industrial Application Field The present invention is applicable to steel pipe piles driven into the ground (S piles), steel pipe wrapped concrete piles (SC piles), and prestressed concrete piles (P piles).
This invention relates to reinforcing metal fittings that are applied to foundation joints of reinforced concrete buildings that are connected to the upper ends of foundation piles such as C piles) and high-strength PC piles (PHC piles).
（２）従来の技術
最近の地震による震害調査により基礎構造の被害、特に
杭基礎の損傷が明らかになるに伴い上部構造とつり合い
のとれた基礎構造の耐震設計の必要性が高まっている。(2) Conventional technology As recent seismic damage surveys have revealed damage to foundation structures, especially damage to pile foundations, there is an increasing need for seismic design of foundation structures that are balanced with the superstructure.
ところが従来の基礎杭と接合する基礎接合部の配筋はそ
のＥ面と側面のよこ筋とたて筋とからなるかご鉄筋と下
面の主筋とから構成されており、第７図及び第８図示の
如く該主筋（ａ）が基礎杭（ｂ）の前後左右にそれぞれ
複数本づつ配設され、これら主筋（ａ）・・・（ａ）が
接合部（ｃ）の補強の役目をなすようにしたものが一般
的である。However, the reinforcement of the conventional foundation joint that connects to the foundation pile is composed of cage reinforcing bars consisting of horizontal and vertical reinforcements on the E side and sides, and main reinforcements on the bottom side, as shown in Figures 7 and 8. A plurality of main reinforcements (a) are arranged on each side of the foundation pile (b), as shown in the figure, so that these main reinforcements (a)...(a) serve to reinforce the joint (c). Those that did are common.
（３）発明が解決しようとする問題点
これら主筋（ａ）・・・（ａ）による補強によれば、地
震により第７図示の如く基礎杭（ｂ）に水平方向の繰り
返しの力（Ｐ）を受けたとき、その力によるせん断力の
一部が基礎接合部の下端部に集中的に作用して該せん断
力の一部を前記主筋（ａ）・・・（ａ）で受けるが、こ
れら主筋（ａ）・・・（ａ）は基礎杭（ｂ）の周囲に方
形に配設されているので、変形し易くて十分に補強の役
目を果さず４又基礎接合部（Ｃ）の内部はコンクリート
のみにより形成されているので、前述の基礎杭（ｂ）に
作用する水平方向の繰り返し力（Ｐ）に伴う該基礎杭（
ｂ）に作用する曲げモーメント（Ｍ）により、前記基礎
接合部（Ｃ）の該基礎杭（ｂ）のくい込み孔（ｄ）の周
囲に亀裂を生じ、かくて該基礎接合部（Ｃ）が十分な耐
力と靭性を有しない欠点があった。(3) Problems to be solved by the invention According to the reinforcement using these main reinforcements (a)...(a), repeated horizontal force (P) is applied to the foundation pile (b) due to an earthquake as shown in Figure 7. When the force is applied, a part of the shear force due to that force acts intensively on the lower end of the foundation joint, and a part of the shear force is received by the main reinforcements (a)...(a), but these Main reinforcing bars (a)... (a) are arranged in a square shape around the foundation pile (b), so they are easily deformed and do not serve as sufficient reinforcement. Since the interior is made only of concrete, the foundation pile (b) due to the horizontal repetitive force (P) acting on the foundation pile (b) described above
The bending moment (M) acting on b) causes a crack in said foundation joint (C) around the penetration hole (d) of said foundation pile (b), thus causing said foundation joint (C) to The drawback was that it did not have sufficient yield strength and toughness.
本発明はこのような欠点を排除し十分な耐力と靭性を有
し施工性の良い補強金具を提供することを目的とする。It is an object of the present invention to eliminate such drawbacks and provide a reinforcing metal fitting that has sufficient strength and toughness and is easy to work.
（４）問題点を解決するための手段
この目的を達成すべく本発明は垂直部とその一端から側
方に延びる水平部とからなる複数の略り字形の連結杆に
より上下の環状体を前記垂直部において連結すると共に
、前記水平部においてｌ又は２以上の直線状又は曲線状
の線材を水平に組合わせてなる補強枠体を連結して成る
ことを特徴とする。(4) Means for Solving the Problems In order to achieve this object, the present invention connects the upper and lower annular bodies to the upper and lower annular bodies by means of a plurality of abbreviated connecting rods consisting of a vertical part and a horizontal part extending laterally from one end of the vertical part. It is characterized in that it is connected in the vertical part, and in the horizontal part, a reinforcing frame body formed by horizontally combining one or more straight or curved wire rods is connected.
（５）作用
本発明補強金具を内外の環状体を下向きにして基礎杭の
上端部に被せるようにして基礎接合部内に埋設すること
により、基礎杭に地震により水平方向の左右の力が繰り
返し作用してもその力によるせん断力の一部を集中的に
受ける基礎接合部の下端部では、該下端部内に埋設され
る連結杆の水平部で連結した変形しにくい補強枠体によ
り前記せん断力の一部を集中的に受け、更に基礎接合部
の全体では該接合部内で１−下方向に埋設した複数の連
結杆の垂直部とこれら垂直部により連結される上下の環
状体とにより前記せん断力の残りを前記接合部の全体で
分散して受け、更に前記水平方向の左右の力により基礎
杭に曲げモーメントが作用して前記接合部の該基礎杭の
くい込み孔の周辺部に引っ張り力が作用してもこの引っ
張り力を前記連結杆の垂直部で受け、かくて基礎接合部
は耐力及び靭性が極めて大となる。(5) Effect By burying the reinforcing metal fitting of the present invention in the foundation joint with the inner and outer annular bodies facing downward and covering the upper end of the foundation pile, horizontal left and right forces are repeatedly applied to the foundation pile due to earthquakes. At the lower end of the foundation joint, which receives a portion of the shearing force caused by the shearing force, the shearing force is absorbed by a hard-to-deform reinforcing frame connected by the horizontal part of the connecting rod buried in the lower end. In addition, the entire foundation joint receives the shearing force due to the vertical parts of the plurality of connecting rods buried downward in the joint part and the upper and lower annular bodies connected by these vertical parts. The remainder is distributed and received throughout the joint, and a bending moment acts on the foundation pile due to the left and right forces in the horizontal direction, and a tensile force is applied to the area around the penetration hole of the foundation pile at the joint. However, this tensile force is received by the vertical portion of the connecting rod, and thus the basic joint has extremely high yield strength and toughness.
（６）実施例
本発明の１実施例を第１図及至第３図に従って説明する
。(6) Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 3.
（１）は垂直部（ｌａ）とその一端から側方に延びる水
平部（１ｂ）とからなるし字形の鉄筋の連結杆、（２）
は多数のたて筋（２ａ）・・・（２ａ）と横筋（２ｂ）
・・・（２ｂ）とを水平に組合わせて各々の交差部にお
いて溶接その他の手段で結着すると共に中央部に孔（２
Ｃ）を形成してなる補強枠体、（３）・・・（３）は前
記補強枠体（２）に形成した孔（２Ｃ）と略同寸法の直
径を有する複数のリング状筋からなる環状体を示し、こ
れら環状体（３）・・・（３）の内側に等間隔に前記連
結杆（１）・・・（１）を垂直部（１ａ）において溶接
その他の手段で結着すると共にこれら連結杆（１）・・
・（１）の水平部（１ｂ）・・・（ｌ ｂ）に前記補強
枠体（２）を中心を略一致させて溶接その他の手段で結
着し、補強金具を形成した。(1) is a square-shaped reinforcing bar connecting rod consisting of a vertical part (la) and a horizontal part (1b) extending laterally from one end; (2)
is a large number of vertical muscles (2a)...(2a) and horizontal muscles (2b)
...(2b) are combined horizontally and connected by welding or other means at each intersection, and a hole (2b) is formed in the center.
A reinforcing frame formed by C), (3)... (3) is composed of a plurality of ring-shaped bars having a diameter approximately the same as the hole (2C) formed in the reinforcing frame (2). Annular bodies are shown, and the connecting rods (1)...(1) are connected at equal intervals to the inside of these annular bodies (3)...(3) at vertical portions (1a) by welding or other means. Together with these connecting rods (1)...
- The reinforcing frame (2) was attached to the horizontal portion (1b) (l b) of (1) by welding or other means with its centers substantially aligned to form a reinforcing metal fitting.
次に該補強金具（４）１の施工について説明すると、先
ず、建設現場の各所定個所に杭打機により基礎杭（５）
を地中に打込んでからコンクリート建造物の基礎工事を
する。即ち、該各基礎杭（弓）の地中突出部（５ａ）の
個所に基礎接合部（６）の配筋（６ａ）をそれぞれする
と共にこれら接合部（６）・・・（６）間をそれぞれ連
結する基礎梁（７）の配筋（７ａ）と柱（８）の配筋（
８ａ）をする、ここで前記基礎接合部（６）の下面には
従来の如く主筋（９）・・・（９）が配筋されている。Next, to explain the construction of the reinforcing metal fittings (4) 1, first, the foundation piles (5) are installed at each predetermined location of the construction site using a pile driver.
The concrete is poured into the ground and then the foundation work for the concrete building is done. That is, the reinforcement (6a) of the foundation joint (6) is placed at the underground protrusion (5a) of each foundation pile (bow), and the reinforcement (6a) is installed between these joints (6)...(6). The reinforcement arrangement (7a) of the foundation beam (7) and the reinforcement arrangement (8) of the column (8) that are connected to each other (
8a), where main reinforcing bars (9)...(9) are arranged on the lower surface of the base joint (6) as in the past.
そして各基礎接合部（６）の個所において、基礎杭（５
）の突出部（５ａ）に補強金具（４）を補強枠体（２）
が下側になるように嵌挿し、該補強枠体（２）を基礎接
合部（６）の主筋（９）・・・（９）に載置する。その
後型枠を装着してコンクリートを打設し、コンクリート
の養生後型枠を撤去して第２図示の如くコンクリート建
造物の基礎部分が°得られる。Then, at each foundation joint (6), place the foundation pile (5
) Attach the reinforcing metal fitting (4) to the protrusion (5a) of the reinforcing frame (2).
The reinforcing frame (2) is placed on the main reinforcing bars (9) (9) of the foundation joint (6). Thereafter, the formwork is attached and concrete is poured, and after the concrete has cured, the formwork is removed to obtain the foundation of the concrete building as shown in the second diagram.
かくて基礎杭（５）に第３図示の如く地震により水平方
向の力（Ｐ）が作用したとき、基礎接合部（６）の下端
部に基礎杭（５）からせん断力（Ｆ）の一部を集中的に
受けるが、この一部の集中的せん断力（ｆ）が基礎接合
部（６）の下端部において連結杆（１）・・・（１）の
水平部（１ｂ）・・・（１ｂ）により連結された補強枠
体（２）によって受けられ、而もこれら補強枠体（２）
に前記水平方向の力（Ｆ）がその水平面内で前後左右の
いずれの方向の繰り返しで作用しても変形するようなこ
とがなく、基礎接合部（６）の下端部の耐力が十分保た
れる。Thus, when a horizontal force (P) is applied to the foundation pile (5) due to an earthquake as shown in Figure 3, part of the shear force (F) from the foundation pile (5) is applied to the lower end of the foundation joint (6). However, this part of the concentrated shear force (f) is applied to the horizontal part (1b) of the connecting rod (1)...(1) at the lower end of the foundation joint (6). (1b) connected by reinforcing frames (2), and these reinforcing frames (2)
Even if the horizontal force (F) is applied repeatedly in any direction in the horizontal plane, the structure will not deform, and the lower end of the foundation joint (6) will maintain sufficient strength. It will be done.
又、残るせん断力（Ｆ）は基礎接合部（６）のＡ部で受
けるが、該残るせん断力（Ｆ）は連結杆（１）・ （１
）の垂直部分（ｌ ａ） −（１ａ）が基礎接合部（６
）の０部まで延長しているのでこれら垂直部分（１ａ）
・・・（１ａ）により該０部に伝えられると共に、リン
グ上の環状体（３）が基礎接合部（６）のＡ部とＢ部と
の間を連結しているので該環状体（３）によりＢ部に伝
えられ、かくて前記残るせん断力（Ｆ）は基礎接合部（
６）の全体で分散して受けることになり、前記水平方向
の力（Ｐ）が前後左右に繰り返して作用しても基礎接合
部（６）は全体として十分な耐力を有する。In addition, the remaining shearing force (F) is received by the A part of the foundation joint (6), but the remaining shearing force (F) is received by the connecting rods (1) and (1
) is the vertical part (l a) - (1a) of the foundation joint (6
), so these vertical parts (1a)
...(1a) to the 0 part, and since the annular body (3) on the ring connects the A part and B part of the basic joint part (6), the annular body (3) ) is transmitted to part B by the base joint (
6), and even if the horizontal force (P) acts repeatedly in the front, rear, left, and right directions, the foundation joint (6) as a whole has sufficient strength.
又前記水平方向の力（Ｐ）により基礎杭（５）に曲げモ
ーメントＣＭ）が作用して該基礎杭（５）が曲げられ、
杭基礎接合部（６）の基礎杭（５）のくい込み孔（１０
）の周面に上下方向の引っ張り力（Ｔ）が生じても該引
つ張り力（Ｔ）は前記連結杆（１）・・・（１）の垂直
部分（ｌａ）・・・（１ａ）で受けられて、くい込み孔
（１０）の周面に亀裂が生じることがなく靭性がある。Further, a bending moment CM) acts on the foundation pile (5) due to the horizontal force (P), and the foundation pile (5) is bent;
The foundation pile (5) penetration hole (10) of the pile foundation joint (6)
) Even if a vertical tensile force (T) is generated on the circumferential surface of the connecting rod (1)...(1), the tensile force (T) is applied to the vertical portion (la)...(1a) The circumferential surface of the penetration hole (10) has no cracks and is tough.
尚上記実施例においては、環状体（３）はリング状の筋
により形成したが、これはスパイラル状であってもよい
。In the above embodiment, the annular body (3) is formed of a ring-shaped strip, but it may be spiral-shaped.
第４図は本発明の第２の実施例を示すもので、補強枠体
（１２）をスパイラル状の環状体（１２ａ）と該環状体
（Ｌ２ａ）の半径方向に溶接その他の方法で結着した直
線状の複数の連結体（１２ｂ）により形成したものであ
り、上記第１の実施例と同様の効果が得られる。FIG. 4 shows a second embodiment of the present invention, in which a reinforcing frame (12) is joined to a spiral-shaped annular body (12a) in the radial direction of the annular body (L2a) by welding or other methods. This structure is formed by a plurality of linear connecting bodies (12b), and the same effects as in the first embodiment can be obtained.
第５図は本発明の第３の実施例を示すもので、補強枠体
（２２）を順次４５°角度をずらして内接する複数の正
方形状の枠状体（２２ａ） （２２ｂ） （２２ｃ
）により形成したものであり、上記第１の実施例と同様
の効果が得られる。FIG. 5 shows a third embodiment of the present invention, in which a plurality of square frame bodies (22a) (22b) (22c) inscribe a reinforcing frame body (22) at an angle of 45 degrees.
), and the same effects as in the first embodiment can be obtained.
尚これら第２、第３の実施例においても第１の実施例同
様環状体（３）はスパイラル状に形成してもよい。Incidentally, in these second and third embodiments, the annular body (3) may be formed in a spiral shape as in the first embodiment.
第６図は本発明の第４の実施例を示すもので。FIG. 6 shows a fourth embodiment of the present invention.
連結杆（１）の垂直部（ｌａ）・・・（ｌａ）にテーバ
状の傾斜をもたせると共に環状体（３）と補強枠体（４
）を−木の螺係状の環状体（５）により形成したもので
あり、上記第１の実施例と同様の効果が得られると共に
、運搬に際して補強金具（４）を積み重ねできる特長が
ある。The vertical portions (la)...(la) of the connecting rod (1) are given a tapered slope, and the annular body (3) and reinforcing frame body (4) are provided with a tapered slope.
) is formed by a wooden screw-shaped annular body (5), which provides the same effect as the first embodiment and has the advantage that the reinforcing metal fittings (4) can be stacked during transportation.
（７）発明の効果
このように本発明補強金具によると垂直部とその一端か
ら側方に延びる水平部とからなる複数の略り字形の連結
杆により上下の環状体を前記垂直部において連結すると
共に前記水平部において補強枠体を連結して構成したの
で、本発明補強金具を内外の環状体を下向きにして基礎
杭のと端部に被せるようにして基礎接合部内に埋設する
ことにより、基礎杭に地震により水平方向の左右の力が
繰り返し作用してもその力によるせん断力の一部を集中
的に受ける基礎接合部の下端部では、該下端部内に埋設
される連結杆の水平部で連結した変形しにくい補強枠体
により前記せん断力の一部を集中的に受け、更に基礎接
合部の全体では該接合部内で上下方向に埋設した複数の
連結杆の垂直部とこれら垂直部により連結されるＬ下の
環状体とにより前記せん断力の残りを前記接合部の全体
で分散して受け、更に前記水平方向の左右の力により基
礎杭に曲げモーメントが作用して前記接合部の該基礎杭
のくい込み孔の周辺部に引っ張り力が作用してもこの引
っ張り力を前記連結杆の垂直部で受け、かくて基礎接合
部は耐力及び、靭性が極めて大となり、施工が容易であ
ると共に構造簡単で廉価に得られ、更に運搬も容易であ
る等の効果を有する。(7) Effects of the Invention As described above, according to the reinforcing metal fitting of the present invention, the upper and lower annular bodies are connected at the vertical portion by a plurality of abbreviated connecting rods each consisting of a vertical portion and a horizontal portion extending laterally from one end of the vertical portion. In addition, the reinforcing frame body is connected in the horizontal part, so the reinforcing metal fitting of the present invention is buried in the foundation joint part with the inner and outer annular bodies facing downward, covering the ends of the foundation pile. Even if horizontal left and right forces are repeatedly applied to the pile due to earthquakes, at the lower end of the foundation joint, which receives a portion of the shearing force due to that force, the horizontal part of the connecting rod buried within the lower end A portion of the shearing force is concentratedly received by the connected reinforcing frame that is difficult to deform, and the entire foundation joint is connected by these vertical parts to the vertical parts of a plurality of connecting rods buried vertically within the joint. The rest of the shearing force is distributed and received by the annular body under L, and the bending moment acts on the foundation pile due to the horizontal left and right forces, causing the foundation of the joint to be Even if a tensile force is applied to the area around the pile penetration hole, this tensile force is received by the vertical part of the connecting rod, and thus the foundation joint has extremely high strength and toughness, and is easy to construct and has a good structure. It has the advantage of being simple, inexpensive, and easy to transport.
第１図は本発明補強金具の第１の実施例の斜視図、第２
図はその使用状態の断面図、第３図はその使用状態にお
いて力の作用状態を示す説明図。
第４図、第５図及び第６図は各々本発明補強金具の第２
、第３及び第４の実施例の斜視χ、第７図は従来の基礎
杭を接合した基礎接合部の断面図。
第８図はその■−■線裁断裁断面図る。
（１）・・・連結杆 （１ａ）・・・垂直部（１
ｂ）・・・水平部
（２）（１２）（２２）・・・補強枠体（３）・・・環
状体 （４）・・・補強金具特許出願人 株式会
社 日建設計
住友金属Ｔ業株式会社Fig. 1 is a perspective view of the first embodiment of the reinforcing metal fitting of the present invention;
The figure is a sectional view of the state of use, and FIG. 3 is an explanatory diagram showing the state of force applied in the state of use. Figures 4, 5 and 6 show the second reinforcing metal fitting of the present invention, respectively.
, a perspective view χ of the third and fourth embodiments, and FIG. 7 is a sectional view of a foundation joint where conventional foundation piles are joined. FIG. 8 is a cross-sectional view taken along the line ■-■. (1)...Connecting rod (1a)...Vertical part (1
b)...Horizontal part (2) (12) (22)...Reinforcement frame (3)...Annular body (4)...Reinforcement metal patent applicant Nikken Sekkei Sumitomo Metals T Co., Ltd. Co., Ltd.
Claims (1)
数の略Ｌ字形の連結杆により上下の環状体を前記垂直部
において連結すると共に、前記水平部において１又は２
以上の直線状又は曲線状の線材を水平に組合わせてなる
補強枠体を連結して成る杭基礎接合部用補強金具。The upper and lower annular bodies are connected in the vertical part by a plurality of approximately L-shaped connecting rods each consisting of a vertical part and a horizontal part extending laterally from one end thereof, and one or two rods are connected in the horizontal part.
A reinforcing metal fitting for pile foundation joints, which is formed by connecting reinforcing frames formed by horizontally combining the above straight or curved wire rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23149684A JPS61109826A (en) | 1984-11-02 | 1984-11-02 | Reinforcing metal fitting for pile-foundation connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23149684A JPS61109826A (en) | 1984-11-02 | 1984-11-02 | Reinforcing metal fitting for pile-foundation connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61109826A true JPS61109826A (en) | 1986-05-28 |
| JPH0445615B2 JPH0445615B2 (en) | 1992-07-27 |
Family
ID=16924399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23149684A Granted JPS61109826A (en) | 1984-11-02 | 1984-11-02 | Reinforcing metal fitting for pile-foundation connection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61109826A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6471927A (en) * | 1987-09-11 | 1989-03-16 | Kajima Corp | Reinforced structure of pile and foundation |
| JP2009019362A (en) * | 2007-07-10 | 2009-01-29 | Shimizu Corp | Structure for joining pile and column |
| JP2011231574A (en) * | 2010-04-30 | 2011-11-17 | Kurosawa Construction Co Ltd | Attachment structure of seismic isolator |
| CN102477738A (en) * | 2010-11-25 | 2012-05-30 | 中铁十八局集团有限公司 | Device for supporting bridge pile after removal of surface concrete |
| JP2012158887A (en) * | 2011-01-31 | 2012-08-23 | Sumitomo Mitsui Construction Co Ltd | Junction structure of pile and foundation structure |
| US11274412B2 (en) | 2019-01-31 | 2022-03-15 | Terracon Consultants, Inc. | Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same |
| US11365523B2 (en) | 2018-11-13 | 2022-06-21 | Terracon Consultants, Inc. | Methods for constructing tensionless concrete pier foundations and foundations constructed thereby |
| US11434617B2 (en) | 2014-10-07 | 2022-09-06 | Terraconn Consultants, Inc. | Retrofit reinforcing structure addition and method for wind turbine concrete gravity spread foundations and the like |
| US11661718B2 (en) | 2018-07-25 | 2023-05-30 | Terracon Consultants, Inc. | Concrete pier foundation with lateral shear reinforcing loops and methods of constructing the same |
| US11885092B2 (en) | 2019-01-31 | 2024-01-30 | Terracon Consultants, Inc. | Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same |
-
1984
- 1984-11-02 JP JP23149684A patent/JPS61109826A/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6471927A (en) * | 1987-09-11 | 1989-03-16 | Kajima Corp | Reinforced structure of pile and foundation |
| JPH0546410B2 (en) * | 1987-09-11 | 1993-07-13 | Kajima Construction Corp | |
| JP2009019362A (en) * | 2007-07-10 | 2009-01-29 | Shimizu Corp | Structure for joining pile and column |
| JP2011231574A (en) * | 2010-04-30 | 2011-11-17 | Kurosawa Construction Co Ltd | Attachment structure of seismic isolator |
| CN102477738A (en) * | 2010-11-25 | 2012-05-30 | 中铁十八局集团有限公司 | Device for supporting bridge pile after removal of surface concrete |
| JP2012158887A (en) * | 2011-01-31 | 2012-08-23 | Sumitomo Mitsui Construction Co Ltd | Junction structure of pile and foundation structure |
| US11434617B2 (en) | 2014-10-07 | 2022-09-06 | Terraconn Consultants, Inc. | Retrofit reinforcing structure addition and method for wind turbine concrete gravity spread foundations and the like |
| US11814808B2 (en) | 2014-10-07 | 2023-11-14 | Terracon Consultants, Inc. | Retrofit reinforcing structure addition and method for wind turbine concrete gravity spread foundations and the like |
| US11661718B2 (en) | 2018-07-25 | 2023-05-30 | Terracon Consultants, Inc. | Concrete pier foundation with lateral shear reinforcing loops and methods of constructing the same |
| US11365523B2 (en) | 2018-11-13 | 2022-06-21 | Terracon Consultants, Inc. | Methods for constructing tensionless concrete pier foundations and foundations constructed thereby |
| US11274412B2 (en) | 2019-01-31 | 2022-03-15 | Terracon Consultants, Inc. | Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same |
| US11885092B2 (en) | 2019-01-31 | 2024-01-30 | Terracon Consultants, Inc. | Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0445615B2 (en) | 1992-07-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |