JPH0445615B2 - - Google Patents

Info

Publication number
JPH0445615B2
JPH0445615B2 JP23149684A JP23149684A JPH0445615B2 JP H0445615 B2 JPH0445615 B2 JP H0445615B2 JP 23149684 A JP23149684 A JP 23149684A JP 23149684 A JP23149684 A JP 23149684A JP H0445615 B2 JPH0445615 B2 JP H0445615B2
Authority
JP
Japan
Prior art keywords
foundation
joint
horizontal
reinforcing
rod
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
Application number
JP23149684A
Other languages
Japanese (ja)
Other versions
JPS61109826A (en
Inventor
Tsukasa Aoyanagi
Toshio Makino
Masatsugu Takesono
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP23149684A priority Critical patent/JPS61109826A/en
Publication of JPS61109826A publication Critical patent/JPS61109826A/en
Publication of JPH0445615B2 publication Critical patent/JPH0445615B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations

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(PC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), prestressed concrete piles (PC piles), This article 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 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
要性が高まつている。ところが従来の基礎杭と接
合する基礎接合部の配筋は、その上面と側面のよ
こ筋とたて筋とからなるかご鉄筋の下面の主筋と
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基礎杭bの前後左右にそれぞれ複数本ず
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。
(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. . However, the reinforcement at the foundation joint that connects to the conventional foundation pile consists of the main reinforcement on the bottom surface of the cage reinforcing bar, which is made up of horizontal and vertical reinforcements on the top and side surfaces, and is shown in Figures 7 and 8. Generally, a plurality of main reinforcements a, . . .

(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
果たさず、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つた。
(3) Problems to be solved by the invention According to the reinforcement using these main reinforcements a...a, when the foundation pile b is subjected to a repeated force P in the horizontal direction due to an earthquake as shown in Figure 7, the shear force due to that force is reduced. A part of the shearing force acts intensively on the lower end of the foundation joint, and a part of the shearing force is received by the main reinforcements a...a, but these main reinforcements a...a are arranged in a rectangular shape around the foundation pile b. Since the foundation pile c is easily deformed and does not serve as sufficient reinforcement, and the inside of the foundation joint c is made only of concrete, the foundation pile b described above is
Due to the bending moment M acting on the foundation pile b due to the horizontal repetitive force P acting on the foundation pile b, a crack is generated around the penetration hole d of the foundation pile b in the foundation joint c, and thus the foundation joint There was a drawback that c 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L
字形の連結杆を、これら水平部を放射状に突出さ
せて前記垂直部の複数個所で補強杆により相互に
連結すると共に、前記水平部の相互を補強杆によ
り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 provides a plurality of approximately
The present invention is characterized in that the horizontal parts of the connecting rods are made to protrude radially, and the vertical parts are connected to each other by reinforcing rods at a plurality of places, and the horizontal parts are connected to each other by the reinforcing rods.

(5) 作用 本発明補強金具を連結杆の水平部を下向きにし
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杆により前記
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の複数個所で連
結される補強杆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
部に引つ張り力が作用してもこの引つ張り力を前
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 horizontal part of the connecting rod facing downward and covering the upper end of the foundation pile, the foundation pile is repeatedly subjected to horizontal left and right forces due to earthquakes. At the lower end of the foundation joint, which receives a portion of the shearing force caused by the applied force, the shearing force is absorbed by a reinforcing rod that is hard to deform and connected with the horizontal part of the connecting rod buried in the lower end. Furthermore, in the entire foundation joint, the shear force is absorbed by the vertical parts of a plurality of connecting rods buried in the vertical direction within the joint, and the reinforcing rods connected at multiple points of these vertical parts. The remaining force is dispersed and received by the entire joint, and a bending moment acts on the foundation pile due to the horizontal left and right forces, and a tensile force is applied to the area around the insertion hole of the foundation pile at the joint. Even if this tensile force is applied, this tensile force is received by the vertical portion of the connecting rod, and thus the base joint has extremely high yield strength and toughness.

(6) 実施例 本発明の1実施例を第1図乃至第3図に従つて
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1aとその一端から側方に延びる水
平部1bとからなるL字形の鉄筋の連結杆、2は
多数のたて筋2a,2aとよこ筋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2cを形成
してなる格子状の補強杆、3,3は前記格子状補
強杆2に形成した孔2cと略同寸法の直径をを有
する複数のリング状筋からなる補強杆を示し、こ
れら補強杆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手段で結
着すると共にこれら連結杆1,1の水平部1b,
1bに前記格子状補強杆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。
Reference numeral 1 denotes an L-shaped reinforcing bar connecting rod consisting of a vertical portion 1a and a horizontal portion 1b extending laterally from one end of the rod, and 2 a plurality of vertical reinforcements 2a, 2a and horizontal reinforcements 2b, 2b horizontally combined. A lattice-shaped reinforcing rod is formed by welding or other means at the intersections of the lattice-shaped reinforcing rods, and a hole 2c is formed in the center. A reinforcing rod consisting of a plurality of ring-shaped striations having , 1 horizontal part 1b,
The lattice-shaped reinforcing rods 2 were attached to 1b by welding or other means with their centers substantially aligned to form a reinforcing metal fitting.

次に該補強金具4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5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。
Next, the construction of the reinforcing metal fittings 4 will be explained.
First, foundation piles 5 are driven into the ground at predetermined locations on the construction site using a pile driver, and then foundation work for the concrete building is carried out. That is, the reinforcement 6a of the foundation joint part 6 is placed at the underground protruding part 5a of each foundation pile 5, and the reinforcement 7a of the foundation beam 7 and the column 8 which connect these joint parts 6, 6 are respectively installed. Place reinforcement 8a.

ここで前記基礎接合部6の下面には従来の如く
手筋9,9が配筋されている。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を格子状補強杆2が下側になるように嵌挿
し該格子状補強杆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を
打設し、コンクリートの養生後型枠を撤去して第
2図の如くコンクリート建造物の基礎部分が得ら
れる。
Here, hand reinforcing bars 9, 9 are arranged on the lower surface of the foundation joint 6 as in the conventional manner. Then, at each foundation joint 6, the reinforcing metal fittings 4 are inserted into the protruding parts 5a of the foundation piles 5 so that the lattice-shaped reinforcing rods 2 are on the lower side, and the lattice-shaped reinforcing rods 2 are connected to the main bars 9 of the foundation joint 6, 9
Place it on. 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 Figure 2.

かくて基礎杭5に第3図示の如く地震により水
平方向力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の下端部おいて連結杆1,1の水平部1b,
1bにより連結された格子状補強杆2によつて受
けられ、而もこれら格子状補強杆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 acts on the foundation pile 5 due to an earthquake as shown in Figure 3, a part of the shear force F is concentrated on the lower end of the foundation joint 6 from the foundation pile 5, but this part The concentrated shear force f of the horizontal part 1b of the connecting rods 1, 1
1b, and even if the horizontal force F is repeatedly applied to these lattice-shaped reinforcing rods 2 in any direction, front, back, left, or right in the horizontal plane, the lattice-shaped reinforcing rods 2 will not deform. There is no such problem, and the strength of the lower end of the foundation joint 6 is maintained sufficiently.

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1a,1aが基礎接合部6のC部まで延長し
ているので、これら垂直部分1a,1aにより該
C部に伝えられると共に、リング状の補強杆3が
基礎接合部6のA部とB部との間を連結している
ので該補強杆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 shear force F is received by the A part of the foundation joint 6, but the remaining shear force F is because the vertical parts 1a, 1a of the connecting rods 1, 1 extend to the C part of the foundation joint 6. The information is transmitted to the C part by these vertical parts 1a, 1a, and since the ring-shaped reinforcing rod 3 connects the A part and B part of the foundation joint part 6, the information is transmitted to the B part by the reinforcing rod 3. Thus, the remaining shear force F is distributed and received by the entire foundation joint 6, and even if the horizontal force P acts repeatedly in the front, back, left, and right directions, the foundation joint 6 as a whole has sufficient strength. Has 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M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
面に上下方向の引つ張り力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1a,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 M acts on the foundation pile 5 due to the horizontal force P, and the foundation pile 5 is bent,
Even if a vertical tensile force T is generated on the circumferential surface of the insertion hole 10 of the foundation pile 5 of the pile foundation joint 6, the tensile force T is applied to the vertical portions 1a, 1a of the connecting rods 1, 1.
The circumferential surface of the bite hole 10 is tough and free from cracks.

尚、上記実施例においては、補強杆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
あつてもよい。
In the above embodiment, the reinforcing rod 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、
スパイラル状の補強杆12aを連結杆1,1の水
平部1b,1bに溶接等により固定すると共にこ
れら水平部1b,1bの個所の補強杆1a上に補
強杆12bを溶接等により固定して形成してお
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,
A spiral reinforcing rod 12a is fixed to the horizontal parts 1b, 1b of the connecting rods 1, 1 by welding or the like, and a reinforcing rod 12b is fixed to the reinforcing rod 1a at these horizontal parts 1b, 1b by welding or the like. Therefore, 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順
次45゜角度をずらして内接する複数の正方形状の
補強杆22a,22b,22cを連結杆1,1の
水平部1b,1bに溶接等により固定して形成し
ており上記第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 reinforcing rods 22a, 22b, 22c are sequentially inscribed at an angle of 45 degrees to the horizontal portions 1b, 1b of the connecting rods 1, 1. Since it is fixedly formed by welding or the like, the same effect as 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
の実施例同様補強杆3はスパイラル状に形成して
もよい。
In addition, in these second and third embodiments, the first
Similar to the embodiment, the reinforcing rod 3 may be formed in a spiral shape.

第6図は本発明の第4の実施例を示すもので連
結杆1の垂直部1a,1aにテーパ状の傾斜をも
たせると共に補強杆2を一本の螺形状の補強杆3
2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徴がある。
FIG. 6 shows a fourth embodiment of the present invention, in which the vertical portions 1a, 1a of the connecting rod 1 are tapered and the reinforcing rod 2 is replaced by a single screw-shaped reinforcing rod 3.
2, the reinforcing metal fittings 4 can be stacked on top of each other during transportation, and the same effects as those of the first embodiment can be obtained.

(7) 発明の効果 このように本発明補助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L字形の連結杆を水平部を放射状に突出させて
垂直部の複数個所及び水平部の相互を補強杆によ
り連結して構成したので、本発明補強金具を連結
杆の水平部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
しにくい補強杆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
れら垂直部の複数個所で連結される補強杆とによ
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つ張り力が作用
してもこの引つ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 auxiliary fitting of the present invention, a plurality of approximately L-shaped connecting rods each consisting of a vertical portion and a horizontal portion extending laterally from one end of the rod are connected by making the horizontal portion protrude radially and connecting the vertical portion. Since a plurality of locations and horizontal parts are connected to each other by reinforcing rods, the reinforcing metal fittings of the present invention can be buried in the foundation joint by covering the upper ends of the foundation piles with the horizontal parts of the connecting rods facing downward. , even if 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 due to that force, the horizontal position of the connecting rod buried within the lower end A portion of the shearing force is concentratedly received by the reinforcing rods that are hard to deform and connected at the joint, and furthermore, in the entire foundation joint, the vertical parts of the plurality of connecting rods buried vertically within the joint and the vertical parts of these vertical parts are The rest of the shearing force is distributed and received by the reinforcing rods connected at multiple points across the joint, and furthermore, the left and right forces in the horizontal direction act on the foundation pile to bending moment, which causes the bending moment to be applied to the joint at the joint. Even if a tensile force is applied to the area around the penetration hole of the foundation pile, this tensile force is received by the vertical part of the connecting rod, and thus the foundation joint has extremely high strength and toughness, making construction easier. It is easy to use, has a simple structure, can be obtained at low cost, and is easy to transport.

【図面の簡単な説明】[Brief explanation of the drawing]

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の実施例の斜視図、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−線裁断面図である。 1…連結杆、1a…垂直部、1b…水平部、2
…補強杆、3…補強杆、12a…補強杆、22a
…補強杆、22b…補強杆、22c…補強杆、3
2…補強杆、4…補強金具。
FIG. 1 is a perspective view of a first embodiment of the reinforcing metal fitting of the present invention, FIG. 2 is a sectional view of the reinforcing metal fitting in use, and FIG. 3 is an explanatory view showing the state of force applied in the use condition.
Figures 4, 5 and 6 are perspective views of second, third and fourth embodiments of the reinforcing metal fittings of the present invention, respectively, and Figure 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, 1b...Horizontal part, 2
...Reinforcement rod, 3...Reinforcement rod, 12a...Reinforcement rod, 22a
...Reinforcement rod, 22b...Reinforcement rod, 22c...Reinforcement rod, 3
2...Reinforcement rod, 4...Reinforcement metal fittings.

Claims (1)

【特許請求の範囲】[Claims] 1 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L字形の連結杆を、これら水平
部を放射状に突出させて前記垂直部の複数個所で
補強杆により相互に連結すると共に、前記水平部
の相互を補強杆により連結して成る杭基礎接合部
用補強金具。
1. A plurality of approximately L-shaped connecting rods each consisting of a vertical portion and a horizontal portion extending laterally from one end of the vertical portion are connected to each other by reinforcing rods at multiple locations of the vertical portion with the horizontal portions protruding radially. , a reinforcing metal fitting for a pile foundation joint, which is formed by connecting the horizontal parts with each other by a reinforcing rod.
JP23149684A 1984-11-02 1984-11-02 Reinforcing metal fitting for pile-foundation connection Granted JPS61109826A (en)

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 JPS61109826A (en) 1986-05-28
JPH0445615B2 true JPH0445615B2 (en) 1992-07-27

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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

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JP (1) JPS61109826A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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
JP5503569B2 (en) * 2011-01-31 2014-05-28 三井住友建設株式会社 Joint structure of pile and foundation structure
US9783950B2 (en) 2014-10-07 2017-10-10 Allan P. Henderson 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
US11885092B2 (en) 2019-01-31 2024-01-30 Terracon Consultants, Inc. Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same
US11274412B2 (en) 2019-01-31 2022-03-15 Terracon Consultants, Inc. Reinforcement structures for tensionless concrete pier foundations and methods of constructing the same

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