JPH1136232A - Composite column base structure and its construction method - Google Patents
Composite column base structure and its construction methodInfo
- Publication number
- JPH1136232A JPH1136232A JP19367597A JP19367597A JPH1136232A JP H1136232 A JPH1136232 A JP H1136232A JP 19367597 A JP19367597 A JP 19367597A JP 19367597 A JP19367597 A JP 19367597A JP H1136232 A JPH1136232 A JP H1136232A
- Authority
- JP
- Japan
- Prior art keywords
- perforated
- cylindrical shell
- unit
- perforated cylindrical
- base structure
- 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.)
- Withdrawn
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- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、橋梁の橋脚、主
塔、あるいは他の構造物における支柱等として用いられ
る柱脚構造物の構造およびその構築方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a column base structure used as a pier, a main tower, or a column in another structure of a bridge, and a method of constructing the same.
【０００２】[0002]
【従来の技術】比較的規模の大きな柱脚としては、従来
から鉄筋コンクリート構造の柱脚や鋼管等による鋼構造
の柱脚がある。2. Description of the Related Art Columnar bases having a relatively large scale include a columnar base having a reinforced concrete structure and a columnar base having a steel structure made of a steel pipe or the like.
【０００３】鉄筋コンクリート構造は、一般的には経済
性に優れ、多用されている構造であり、特に大規模な場
合には、スライディングフォーム工法、スリップフォー
ム工法やジャンピングフォーム工法等により、移動型枠
を順次上方へ移動させながら、配筋およびコンクリート
の打設を行い、柱脚構造物が構築される。[0003] Reinforced concrete structures are generally economical and are widely used structures. In particular, when a large-scale structure is used, a moving form is formed by a sliding form method, a slip form method, a jumping form method, or the like. While sequentially moving upward, reinforcement and concrete placement are performed, and a column-base structure is constructed.
【０００４】一方、鋼構造は所定の長さの鋼管等を溶接
あるいはボルト接合等で順次上方へ継ぎ足していくこと
により、短い工期で柱脚構造体を構築することができ、
また、均一な材質を有するため、強度面においても信頼
性が高いという利点がある。On the other hand, a steel base can be constructed in a short period by constructing a steel pipe or the like of a predetermined length upward by welding or bolting sequentially.
In addition, since it has a uniform material, there is an advantage that reliability is high in terms of strength.
【０００５】[0005]
【発明が解決しようとする課題】鉄筋コンクリート構造
の柱脚をスライディングフォーム工法、スリップフォー
ム工法やジャンピングフォーム工法で構築する場合、足
場、支保工、その他の仮設資材を必要とする他、鉄筋の
組立作業、移動型枠の組立てや、ジャッキアップ、解体
等の手間がかかり、多くの人手と工期を必要とする。When a column base of a reinforced concrete structure is constructed by a sliding form method, a slip form method or a jumping form method, scaffolds, supports, and other temporary materials are required. It takes time and labor to assemble, jack up, and disassemble the movable formwork, and requires a lot of manpower and construction time.
【０００６】また、鋼管等を用いた鋼構造の柱脚の場
合、大型の構造物になると現場への搬入が困難になるこ
とや、建込みにあたって大型のクレーンを必要とする等
の問題がある他、鉄筋コンクリートと比べて、資材のコ
ストが高くつく。Further, in the case of a column base having a steel structure using a steel pipe or the like, there is a problem that it becomes difficult to carry the column base to a large-sized structure, and a large crane is required for installation. In addition, the cost of materials is higher than reinforced concrete.
【０００７】本願発明は上述のような従来技術における
課題の解決を図ったものであり、強度、耐候性に優れ、
施工が容易で経済性の高い鋼コンクリート複合構造の柱
脚構造物およびその構築方法を提供することを目的とし
ている。The present invention has been made to solve the problems in the prior art as described above, and is excellent in strength and weather resistance.
An object of the present invention is to provide a column-base structure having a steel-concrete composite structure that is easy to construct and that is economical, and a method for constructing the column-base structure.
【０００８】[0008]
【課題を解決するための手段】本願の請求項１に係る複
合柱脚構造物は、略鉛直方向に配置した複数の孔あき鋼
板どうしを水平方向に連結して閉断面を有する単位孔あ
き筒状殻を形成し、この単位孔あき筒状殻を鉛直方向に
複数接合することにより孔あき筒状殻を形成し、孔あき
筒状殻を内包するように所要のかぶりを設けてコンクリ
ートを打設してなる。According to a first aspect of the present invention, there is provided a composite column-base structure comprising a unit-perforated cylinder having a closed cross-section by connecting a plurality of perforated steel plates arranged substantially vertically to each other in a horizontal direction. A perforated tubular shell is formed by joining a plurality of the perforated tubular shells in the vertical direction, and a required covering is provided so as to include the perforated tubular shell and concrete is cast. I will set it up.
【０００９】孔あき鋼板を水平方向および鉛直方向に接
合して孔あき筒状殻を形成し、この孔あき筒状殻を内包
するコンクリートとともに複合構造をなすものであり、
強度、耐候性に優れる他、構成部材が単純な形態とな
り、施工性、経済性の面でも有利である。また、孔あき
鋼板を用いたことでコンクリートとの付着力が高まり、
一体性に優れる。さらに、孔あき鋼板部分の防食の問題
もない。A perforated steel plate is joined in a horizontal direction and a vertical direction to form a perforated cylindrical shell, and a composite structure is formed together with the concrete containing the perforated cylindrical shell.
In addition to being excellent in strength and weather resistance, the constituent members have a simple form, which is advantageous in terms of workability and economy. In addition, the use of perforated steel plates increases the adhesion to concrete,
Excellent in unity. Furthermore, there is no problem of corrosion prevention of the perforated steel plate portion.
【００１０】なお、単位孔あき筒状殻の鉛直方向の接合
は、溶接あるいはボルトを用いて行うことができる。[0010] The unitary perforated cylindrical shell can be joined in the vertical direction by welding or using bolts.
【００１１】また、筒状殻の断面形状については、円
形、楕円形、矩形など、適宜選択することができる。The cross-sectional shape of the cylindrical shell can be appropriately selected from a circle, an ellipse, a rectangle, and the like.
【００１２】請求項２は、請求項１に係る複合柱脚構造
物において、孔あき鋼板は両側端部にフランジを有し、
隣接する孔あき鋼板のフランジどうしを水平方向にボル
ト接合することで単位孔あき筒状殻を形成している場合
を限定したものである。この場合、孔あき鋼板どうしの
水平方向の現場接合が非常に簡単な作業となる。According to a second aspect of the present invention, in the composite column base structure according to the first aspect, the perforated steel plate has flanges at both ends.
This limits the case where a unitary perforated cylindrical shell is formed by horizontally bolting adjacent flanges of perforated steel plates. In this case, joining the perforated steel plates in the horizontal direction in the horizontal direction is a very simple operation.
【００１３】なお、請求項２のようなボルト接合によら
ず、隣接する孔あき鋼板の側端部どうしを溶接接合する
ことで単位孔あき筒状殻を形成することも可能である。It is also possible to form a unit-perforated cylindrical shell by welding the side end portions of adjacent perforated steel plates instead of using the bolt connection as in the second aspect.
【００１４】請求項３に係る発明は、請求項１または２
記載の複合柱脚構造物において、孔あき鋼板の内面側
に、中心方向に突出し柱軸方向に連続するつなぎ材が固
定されており、各孔あき鋼板のつなぎ材間に、両側端部
にフランジを形成してなる内鋼板を配置して連結するこ
とにより、孔あき筒状殻の内側に閉断面を有する筒状内
殻を形成し、この孔あき筒状殻を内包するように所要の
かぶりを設けて筒状内殻の外側にコンクリートを打設し
てなるものである。The invention according to claim 3 is the invention according to claim 1 or 2
In the composite column base structure described in the above, on the inner surface side of the perforated steel plate, a connecting member projecting in the center direction and continuing in the column axis direction is fixed, and between the connecting members of each perforated steel plate, flanges are provided at both ends. By forming and connecting the inner steel plates that form the above, a cylindrical inner shell having a closed cross section is formed inside the perforated cylindrical shell, and the required covering is included so as to include the perforated cylindrical shell. And concrete is cast on the outside of the cylindrical inner shell.
【００１５】孔あき筒状殻と筒状内殻が二重筒状殻を構
成し、二重筒状殻の外側に配置される型枠と筒状内殻と
の間にコンクリートが打設されるため、柱脚中央部を中
空構造とすることができる。その分、柱脚としての曲げ
剛性を損なうことなくコンクリート量を低減させること
ができ、経済性が向上する。[0015] The perforated cylindrical shell and the cylindrical inner shell constitute a double cylindrical shell, and concrete is poured between the cylindrical inner shell and a mold disposed outside the double cylindrical shell. Therefore, the center of the column base can have a hollow structure. To that extent, the amount of concrete can be reduced without impairing the bending rigidity of the column base, and the economic efficiency is improved.
【００１６】請求項４は、請求項１、２または３記載の
複合柱脚構造物を複数並列させ、これらを連結部材で連
結することにより多柱複合柱脚構造物としたものであ
る。According to a fourth aspect of the present invention, a multi-column composite column base structure is obtained by arranging a plurality of the composite column base structures according to the first, second, and third aspects in parallel, and connecting these with connecting members.
【００１７】橋梁の桁を支える橋脚の場合等において
は、多柱複合柱脚構造物とすることで、橋軸直角方向の
強度および剛性を確保するのが容易となる。In the case of a pier supporting a girder of a bridge, etc., by using a multi-column composite column-base structure, it is easy to secure strength and rigidity in a direction perpendicular to the bridge axis.
【００１８】請求項５は、請求項１または２記載の複合
柱脚構造物の構築方法を与えるものであり、柱脚構造物
構築位置にセンターホールジャッキ等のジャッキを用い
たジャッキアップ装置を有するジャッキアップ架台を固
定し、柱脚構造物の最上部に位置する単位孔あき筒状殻
を前記ジャッキアップ架台内に設置して略単位孔あき筒
状殻の高さ分ジャッキアップした後、順次、下側に位置
する単位孔あき筒状殻を前記ジャッキアップ架台内に設
置し、既にジャッキアップされている上側の単位孔あき
筒状殻と溶接により連結する工程と、連結した複数の単
位孔あき筒状殻をさらに略単位孔あき筒状殻の高さ分ジ
ャッキアップする工程とを、所要回数繰り返し、続いて
柱脚構造物の最下部に位置する単位孔あき筒状殻を上側
の単位孔あき筒状殻と溶接により連結して柱状の孔あき
筒状殻を形成し、この孔あき筒状殻の外側に型枠を設置
し、型枠の内側にコンクリートを打設するようにしたも
のである。According to a fifth aspect of the present invention, there is provided a method of constructing a composite column-base structure according to the first or second aspect, wherein a jack-up device using a jack such as a center hole jack is provided at a column-base structure construction position. After fixing the jack-up pedestal and installing the unit-perforated cylindrical shell located at the top of the column-base structure in the jack-up pedestal and jacking up the height of the substantially unit-perforated cylindrical shell, sequentially Installing a lower unit-perforated cylindrical shell located on the lower side in the jack-up pedestal, connecting the upper unit-perforated cylindrical shell already jacked up by welding, and connecting the plurality of connected unit holes. Repeating the step of jacking up the perforated cylindrical shell by approximately the height of the perforated cylindrical shell a required number of times, and then replacing the perforated cylindrical shell located at the bottom of the column base structure with the upper unit Perforated cylindrical Joined by welding to form a columnar perforated cylindrical shell, established the mold outside the perforated cylindrical shell, in which the concrete inside the mold was such that pouring.
【００１９】すなわち、ジャッキアップを行いながら、
順次、下から単位孔あき筒状殻を継ぎ足して孔あき筒状
殻を構築して行くものであり、大型のクレーン等を用い
ることなく、地上に近い、一定の位置で接合作業を行う
ことができる。That is, while jacking up,
A perforated cylindrical shell is constructed by sequentially adding unitary cylindrical shells from the bottom, and joining work can be performed at a fixed position near the ground without using a large crane or the like. it can.
【００２０】請求項６は、請求項３記載の中空構造の複
合柱脚構造物の構築方法を与えるものであり、柱脚構造
物構築位置にジャッキアップ装置を有するジャッキアッ
プ架台を固定し、柱脚構造物の最上部に位置する単位孔
あき筒状殻をジャッキアップ架台内に設置して略単位孔
あき筒状殻の高さ分ジャッキアップした後、順次、下側
に位置する単位孔あき筒状殻を前記ジャッキアップ架台
内に設置し、既にジャッキアップされている上側の単位
孔あき筒状殻と溶接により連結する工程と、連結した複
数の単位孔あき筒状殻をさらに略単位孔あき筒状殻の高
さ分ジャッキアップする工程とを、所要回数繰り返し、
続いて柱脚構造物の最下部に位置する単位孔あき筒状殻
を上側の単位孔あき筒状殻と溶接により連結して柱状の
孔あき筒状殻を形成するとともに、この孔あき筒状殻の
内側につなぎ材を介して内鋼板からなる筒状内殻を形成
し、孔あき筒状殻の外側に型枠を設置し、型枠と筒状内
殻との間にコンクリートを打設するようにしたものであ
る。According to a sixth aspect of the present invention, there is provided a method of constructing a composite column-base structure having a hollow structure according to the third aspect, wherein a jack-up base having a jack-up device is fixed at a column-base structure constructing position. After installing the unit-perforated cylindrical shell located at the top of the leg structure in the jack-up rack and jacking up the height of the substantially unit-perforated cylindrical shell, the unit holes located on the lower side are successively located. Installing the cylindrical shell in the jack-up pedestal, connecting the upper unit-perforated cylindrical shell already jacked up by welding, and further connecting the plurality of connected unit-perforated cylindrical shells to substantially unit holes. The process of jacking up by the height of the hollow cylindrical shell is repeated the required number of times,
Subsequently, the unit-perforated cylindrical shell located at the bottom of the column base structure is connected to the upper unit-perforated cylindrical shell by welding to form a column-shaped perforated cylindrical shell, and the perforated cylindrical shell is formed. Form a cylindrical inner shell made of inner steel plate with a connecting material inside the shell, install a formwork outside the perforated cylindrical shell, and cast concrete between the formwork and the cylindrical inner shell It is something to do.
【００２１】筒状内殻の形成方法については、１つの形
態として、鋼板の両側端部にフランジを設けた内鋼板を
つなぎ材間に配置し、つなぎ材を挟み込んで隣接するフ
ランジどうしをボルトで連結することにより閉断面を有
する単位筒状内殻を形成し、単位孔あき筒状殻とともに
単位二重筒状殻を形成し、これをジャッキアップしなが
ら、順次、下から継ぎ足して、孔あき筒状殻と筒状内殻
とからなる二重筒状殻を構築して行く方法がある。As a method of forming the cylindrical inner shell, as one mode, an inner steel plate having flanges provided at both end portions of a steel plate is disposed between connecting members, and the connecting members are sandwiched and adjacent flanges are bolted to each other. By connecting, a unit cylindrical inner shell having a closed cross section is formed, and a unit double cylindrical shell is formed together with the unit-perforated cylindrical shell. There is a method of constructing a double cylindrical shell composed of a cylindrical shell and a cylindrical inner shell.
【００２２】この他、二重筒状殻を構成する孔あき筒状
殻と、筒状内殻とをずらして組み立てて行くことも可能
であり、その場合、単位孔あき筒状殻を構成する孔あき
鋼板の高さと筒状内殻を構成する内鋼板の高さが異なっ
ていてもよい。また、筒状内殻を先に組み立てておき、
その外側に孔あき鋼板を配置して二重筒状殻を形成して
もよい。In addition, it is also possible to assemble the cylindrical shell with a hole and the cylindrical shell with a hole, which constitute the double cylindrical shell, in which case the cylindrical shell with a unit hole is formed. The height of the perforated steel plate and the height of the inner steel plate constituting the cylindrical inner shell may be different. Also, assemble the cylindrical inner shell first,
A perforated steel plate may be arranged on the outside to form a double cylindrical shell.
【００２３】[0023]
【発明の実施の形態】図１は、本願の請求項１、２に係
る複合柱脚構造物を、橋梁用の脚部材に適用した場合の
一実施形態を示したもので、(a) はコンクリート中実断
面を有する柱脚構造物全体の斜視図、(b) は柱脚部分の
水平断面図である。FIG. 1 shows an embodiment in which the composite column-base structure according to claims 1 and 2 of the present application is applied to a leg member for a bridge. FIG. 3 is a perspective view of the entire column base structure having a solid concrete section, and FIG.
【００２４】この例では、両側端部にフランジ１１を設
けた円弧状の孔あき鋼板２のフランジ１１を円周方向に
連結して単位筒状殻１ａを組み立て、この単位筒状殻１
ａを鉛直方向に溶接接合して柱状の孔あき筒状殻１を形
成し、孔あき筒状殻１を所要のかぶりを設けて内包する
ようにコンクリート３を打設し、複合柱脚としている。In this example, a unit cylindrical shell 1a is assembled by connecting flanges 11 of an arc-shaped perforated steel plate 2 provided with flanges 11 at both end portions in a circumferential direction, and assembling the unit cylindrical shell 1a.
a is welded in the vertical direction to form a column-shaped perforated cylindrical shell 1, and concrete 3 is cast so that the perforated cylindrical shell 1 is provided with a required covering and included therein to form a composite column base. .
【００２５】なお、図中、符号４は円周方向接合部、符
号５は鉛直方向接合部を示す。また、孔あき筒状殻１の
下部は、鉄筋コンクリート製の基礎６に固定されてい
る。In the drawings, reference numeral 4 denotes a circumferential joint, and reference numeral 5 denotes a vertical joint. The lower part of the perforated cylindrical shell 1 is fixed to a reinforced concrete foundation 6.
【００２６】図２は、本願の請求項３に係る複合柱脚構
造物を、橋梁用の脚部材に適用した場合の一実施形態を
示したもので、(a) は中空断面を有する柱脚構造物全体
の斜視図、(b) は柱脚部分の水平断面図である。FIG. 2 shows an embodiment in which the composite column base structure according to claim 3 of the present invention is applied to a bridge leg member. FIG. 2A shows a column base having a hollow cross section. FIG. 2 is a perspective view of the entire structure, and FIG. 2B is a horizontal sectional view of a column base.
【００２７】上述した図１の柱脚構造では、単位筒状殻
１を内包するコンクリート３が中実状態で打設されてい
る。しかし、断面の中心部分は作用モーメントに対する
抵抗力が小さいため、この部分のコンクリートが無駄で
あるとともに、重量増加によって地震時の作用力が増加
する原因ともなる。このため、中心付近を中空断面とす
ることが望ましい。In the column-base structure shown in FIG. 1, concrete 3 containing unit cylindrical shell 1 is cast in a solid state. However, since the central portion of the cross section has a small resistance to the acting moment, the concrete in this portion is wasted, and the acting force at the time of the earthquake increases due to the increase in weight. For this reason, it is desirable to have a hollow section near the center.
【００２８】図２に示した例では、孔あき筒状殻１を構
成する孔あき鋼板２の内側に、中心方向に突出し柱軸方
向に連続したつなぎ材１８を固定し、両側端部にフラン
ジ３１を設けた円弧状の内鋼板２２をつなぎ材１８間に
配置し、つなぎ材１８を挟み込んで水平方向に隣接する
フランジ３１どうしをボルト３３で連結することによ
り、鋼製の筒状内殻２１を形成し、孔あき筒状殻１の外
側に設置した型枠（図示せず）と筒状内殻２１の外面と
の間にコンクリート３を充填して、断面中央部に中空部
を有する複合柱脚構造物としている。In the example shown in FIG. 2, a connecting member 18 projecting in the center direction and continuing in the column axis direction is fixed inside the perforated steel plate 2 constituting the perforated cylindrical shell 1, and flanges are provided at both ends. By disposing the arc-shaped inner steel plate 22 provided with the connecting members 31 between the connecting members 18 and connecting the horizontally adjacent flanges 31 with bolts 33 with the connecting members 18 interposed therebetween, the steel cylindrical inner shell 21 is formed. And a concrete 3 is filled between a mold (not shown) provided outside the perforated cylindrical shell 1 and the outer surface of the cylindrical inner shell 21 to form a composite having a hollow portion in the center of the cross section. It has a column base structure.
【００２９】図３(a) は、図１の実施形態で用いる孔あ
き鋼板２の形態の一例を示したもので、この例では孔あ
き鋼板２が両側端部にフランジ１１を設けた円弧状の鋼
板からなり、フランジ１１にボルト接合用のボルト孔１
２を設けてある。この孔あき鋼板２どうしを円周方向に
ボルトで連結することにより、単位孔あき筒状殻１ａが
形成され、単位孔あき筒状殻１ａどうしを鉛直方向に溶
接することで柱状の鋼製孔あき筒状殻１が形成される。FIG. 3 (a) shows an example of the form of the perforated steel plate 2 used in the embodiment of FIG. 1. In this example, the perforated steel plate 2 has an arcuate shape with flanges 11 provided at both ends. Bolt holes 1 for bolt connection to the flange 11
2 is provided. The perforated steel plates 2 are connected to each other by bolts in the circumferential direction to form unit-perforated cylindrical shells 1a. The unit-perforated cylindrical shells 1a are vertically welded to each other to form columnar steel holes. A hollow cylindrical shell 1 is formed.
【００３０】図３(b) 、(c) は、それぞれ孔あき鋼板２
の形態の他の例を示したもので、これらの例では円弧状
孔あき鋼板の両側端部のフランジ１１に加えて、円周方
向リブ１３あるいは鉛直方向リブ１４を設けて、孔あき
鋼板２の剛性増加を図っている。FIGS. 3 (b) and 3 (c) show the perforated steel plate 2 respectively.
In these examples, circumferential ribs 13 or vertical ribs 14 are provided in addition to the flanges 11 on both side ends of the arc-shaped perforated steel plate to form the perforated steel plate 2. To increase the rigidity.
【００３１】図３(d) は図２の実施形態で用いる孔あき
鋼板２の形態の一例を示したものである。この例では、
両側端部にフランジ１１を設けた円弧状の鋼板の内側
に、中心方向に突出し、柱軸方向に連続するつなぎ材１
８を設け、また、フランジ１１にボルト接合用のボルト
孔１２を設けてある。この孔あき鋼板２どうしを円周方
向にボルトで連結して単位孔あき筒状殻を形成する。FIG. 3 (d) shows an example of the form of the perforated steel plate 2 used in the embodiment of FIG. In this example,
A connecting member 1 protruding in the center direction and continuing in the column axis direction inside an arc-shaped steel plate provided with flanges 11 at both end portions.
8 and a bolt hole 12 for bolt connection is provided in the flange 11. The perforated steel plates 2 are connected to each other by bolts in the circumferential direction to form a unitary perforated cylindrical shell.
【００３２】図４(a) 、(b) は本願の請求項５に係る構
築方法における孔あき筒状鋼殻１の構築の様子を示した
もので、図１、図２の複合柱脚構造物の構築に利用する
ことができる。以下、その施工手順を図１、図２の符号
を引用しながら説明する。FIGS. 4 (a) and 4 (b) show the construction of the perforated tubular steel shell 1 in the construction method according to the fifth aspect of the present invention. It can be used for building things. Hereinafter, the construction procedure will be described with reference to the reference numerals in FIGS.
【００３３】まず、柱脚を支持する基礎６を構築する。
通常、基礎６は鉄筋コンクリート構造である。基礎６を
構築する際、円筒柱状に形成される孔あき筒状殻１およ
び後述するジャッキアップ架台５１を固定するためのア
ンカーボルトを埋め込んでおく。First, the foundation 6 for supporting the column base is constructed.
Usually, the foundation 6 is a reinforced concrete structure. When constructing the foundation 6, an anchor bolt for fixing the perforated cylindrical shell 1 formed into a cylindrical column shape and a jack-up gantry 51 described later is embedded.
【００３４】次に、基礎６上に鉄骨製のジャッキアップ
架台５１を構築し、下端部を基礎６に埋め込まれたアン
カーボルトに固定する。孔あき鋼板２は工場で製作され
現場に搬入された後、ジャッキアップ架台５１に隣接す
る組立ヤードにおいて、ボルトまたは溶接で円周方向に
連結して単位孔あき筒状殻１ａを形成する。Next, a jack-up frame 51 made of steel is constructed on the foundation 6 and its lower end is fixed to an anchor bolt embedded in the foundation 6. After the perforated steel plate 2 is manufactured at the factory and carried into the site, in the assembly yard adjacent to the jack-up gantry 51, the perforated steel plate 2 is connected circumferentially by bolts or welding to form a perforated cylindrical shell 1a.
【００３５】次に、単位孔あき筒状殻１ａをジャッキア
ップ架台５１の内部に引き込み、単位孔あき筒状殻１ａ
の上部と既に持ち上げられている孔あき筒状殻１下端の
単位孔あき筒状殻１ａの下部を溶接により鉛直方向に連
結する。Next, the unit-perforated cylindrical shell 1a is drawn into the inside of the jack-up base 51, and the unit-perforated cylindrical shell 1a is drawn.
And the lower part of the unitary perforated cylindrical shell 1a at the lower end of the perforated cylindrical shell 1 already lifted are connected in the vertical direction by welding.
【００３６】次に連結された孔あき筒状殻１は、ジャッ
キアップ架台５１に取り付けられたジャッキ５２で、概
ね単位孔あき筒状殻１ａの高さ分持ち上げられる。その
間、組立ヤードでは次の単位孔あき筒状殻１ａが組み立
てられ、架台５１内でのジャッキアップの後に、新たな
単位孔あき筒状殻１ａがジャッキアップ架台５１内部に
引き込まれ、持ち上げられている孔あき筒状殻１の下部
と溶接接合される。Next, the connected perforated cylindrical shell 1 is lifted by a jack 52 attached to a jack-up gantry 51 approximately by the height of the unit perforated cylindrical shell 1a. Meanwhile, in the assembly yard, the next unit-perforated cylindrical shell 1a is assembled, and after jack-up in the gantry 51, a new unit-perforated cylindrical shell 1a is drawn into the jack-up gantry 51 and lifted. Is welded to the lower part of the perforated cylindrical shell 1.
【００３７】この手順を繰り返すことにより、孔あき筒
状殻１を柱状に組み立てて行く。By repeating this procedure, the perforated cylindrical shell 1 is assembled into a column shape.
【００３８】孔あき筒状殻１を所定高さまで組み立てた
後、基礎６に埋め込まれたアンカーボルトで孔あき筒状
殻１の下端部を固定する。After assembling the perforated cylindrical shell 1 to a predetermined height, the lower end of the perforated cylindrical shell 1 is fixed with anchor bolts embedded in the foundation 6.
【００３９】図５は、図４の工程に続くコンクリートの
打設をスリップフォーム工法を利用して行う場合の施工
の様子を示したもので、図６(a) 〜(c) はそれぞれ、図
５のＡ−Ａ断面図、Ｂ−Ｂ断面図、Ｃ−Ｃ断面図であ
る。FIGS. 5A to 5C show the construction in the case where the concrete casting following the process of FIG. 4 is performed by using the slip-form method. FIGS. 5 is a sectional view taken along line AA, BB, and CC of FIG.
【００４０】なお、図５、図６は、孔あき筒状殻１の内
側に、図２の筒状内殻２１を有する請求項３に対応する
複合柱脚構造物を構築する場合の例となっている。FIGS. 5 and 6 show an example in which a composite column base structure corresponding to claim 3 having the cylindrical inner shell 21 of FIG. 2 inside the perforated cylindrical shell 1 is shown. Has become.
【００４１】図４のようにして構築された孔あき筒状殻
１の内側に、孔なしの内鋼板２２を水平方向および鉛直
方向に接合して形成される筒状内殻２１が構築された状
態から、その外周にスリップフォーム工法用の移動型枠
６０を組み立てる。この移動型枠６０には、コンクリー
トホッパ６４を設置した主作業床６１、ジャッキ６５、
油圧ユニット６６、型枠６７等を備えた中作業床６２、
下作業床６３等が組み込まれている。Inside the perforated cylindrical shell 1 constructed as shown in FIG. 4, a cylindrical inner shell 21 formed by joining an inner steel plate 22 without holes in the horizontal and vertical directions is constructed. From the state, the movable formwork 60 for the slip form method is assembled on the outer periphery. The movable formwork 60 includes a main work floor 61 on which a concrete hopper 64 is installed, a jack 65,
A middle working floor 62 having a hydraulic unit 66, a formwork 67, etc.,
The lower work floor 63 and the like are incorporated.
【００４２】施工においては、主作業床６１に設置した
ウインチ６８によりコンクリートバケット６９を吊り上
げ、コンクリートホッパ６４より孔あき筒状殻１の外側
に位置する型枠６７と筒状内殻２１との間にコンクリー
ト３を打設する。なお、コンクリートホッパ６４等の設
備は主作業床６１上のレール７０に沿って円周方向に移
動可能となっている。In the construction, the concrete bucket 69 is lifted by the winch 68 installed on the main work floor 61, and the space between the mold 67 and the cylindrical inner shell 21 located outside the perforated cylindrical shell 1 from the concrete hopper 64. Concrete 3 is poured in. The facilities such as the concrete hopper 64 can move in the circumferential direction along the rail 70 on the main work floor 61.
【００４３】続いて、コンクリート３の硬化を確認しな
がらジッキ６５の操作により移動型枠６０をゆっくりと
ジャップアップして行く。このような作業を、順次、繰
り返すことで、柱脚上端までコンクリート３を打設して
行く。Subsequently, while confirming the hardening of the concrete 3, the movable mold 60 is slowly jumped up by operating the jack 65. By repeating such operations sequentially, the concrete 3 is poured to the upper end of the column base.
【００４４】なお、打設するコンクリート３には、高流
動コンクリートを用いることにより、締固め作業が不要
となり、打設、充填作業を容易に実施することができ
る。By using high-fluidity concrete for the concrete 3 to be cast, compaction work is not required, and casting and filling work can be easily performed.
【００４５】図７は、本願の請求項４に係る多柱複合柱
脚構造物の一実施形態を示したものである。この例で
は、橋軸直角方向に２本の複合柱脚４０を配置し、複合
柱脚４０間を連結部材４２で連結して多柱複合柱脚構造
としている。FIG. 7 shows an embodiment of a multi-column composite column base structure according to claim 4 of the present application. In this example, two composite column bases 40 are arranged in the direction perpendicular to the bridge axis, and the composite column bases 40 are connected by a connecting member 42 to form a multi-column composite column base structure.
【００４６】多柱構造とすることにより、道路の幅から
決まる橋軸直角方向の必要幅を確保するとともに、剛性
や強度を増加させている。With the multi-column structure, the required width in the direction perpendicular to the bridge axis determined by the width of the road is secured, and the rigidity and strength are increased.
【００４７】多柱複合柱脚を構成する個々の複合柱脚
は、単体の孔あき筒状殻のみを内包する中実断面の場合
（図７の場合）と、二重筒状鋼殻を有する中空断面の場
合の両方がある。Each of the composite column bases constituting the multi-column composite column base has a solid cross section including only a single perforated cylindrical shell (in the case of FIG. 7) and a double cylindrical steel shell. There are both cases with hollow sections.
【００４８】[0048]
【発明の効果】 本願発明の複合柱脚構造物は、鋼板等を構成要素とす
る孔あき鋼板を水平方向および鉛直方向に接合して孔あ
き筒状殻を形成し、この孔あき筒状殻を内包するように
打設したコンクリートとともに複合構造をなすものであ
り、強度、耐候性に優れる他、構成部材が単純な形態と
なり、施工性、経済性の面でも有利である。孔あき鋼板
はコンクリートとの付着力が高く、複合構造としての一
体性に優れる。According to the composite column base structure of the present invention, a perforated steel plate having a steel plate or the like as a component is joined in a horizontal direction and a vertical direction to form a perforated cylindrical shell. It has a composite structure together with concrete cast in such a way as to include, and has excellent strength and weather resistance, and has a simple configuration of components, which is advantageous in terms of workability and economy. Perforated steel plate has a high adhesive force to concrete, and is excellent in integrity as a composite structure.
【００４９】また、孔あき筒状殻部分については、鉛
直方向の接合部が溶接またはボルトにより接合されてい
るため、接合部における引張耐力も確保される。Further, as for the perforated cylindrical shell portion, the joint in the vertical direction is joined by welding or bolts, so that the tensile strength at the joint is ensured.
【００５０】請求項２に係る複合柱脚構造物では、隣
接する孔あき鋼板どうしの水平方向の現場接合をボルト
によって簡単に行うことができる。In the composite column base structure according to the second aspect, the horizontal on-site joining between adjacent perforated steel plates can be easily performed by bolts.
【００５１】請求項３に係る複合柱脚構造物では、孔
あき筒状殻と筒状内殻が二重筒状殻を構成し、柱脚中央
部を中空構造とすることができ、その分、柱脚としての
曲げ剛性を損なうことなくコンクリート量を低減させる
ことができ、経済性が向上する。In the composite column base structure according to the third aspect, the perforated cylindrical shell and the cylindrical inner shell constitute a double cylindrical shell, and the central portion of the column base can have a hollow structure. In addition, the amount of concrete can be reduced without impairing the bending rigidity as a column base, and the economic efficiency is improved.
【００５２】請求項４に係る多柱複合柱脚構造物で
は、橋梁の桁を支える橋脚等に適用する場合において、
橋軸直角方向の強度および剛性を確保するのが容易とな
る。また、複数の鋼製筒状殻の柱を同時に施工でき、工
期が短縮される。In the multi-column composite column-base structure according to claim 4, when applied to a bridge pier or the like supporting a bridge girder,
It is easy to secure strength and rigidity in the direction perpendicular to the bridge axis. Further, a plurality of steel cylindrical shell columns can be simultaneously constructed, and the construction period is shortened.
【００５３】請求項５、６に係る複合柱脚構造物の構
築方法では、ジャッキアップを行いながら、順次、下か
ら単位孔あき筒状殻を継ぎ足して孔あき筒状殻を構築し
て行くため、大型のクレーン等を用いることなく、地上
に近い、一定の位置で接合作業を行うことができ、施工
性、安全性、経済性が向上する。また、溶接作業の自動
化や風に対する養生等の作業環境整備、手摺等の安全設
備を整えるのが容易である。In the method of constructing a composite column base structure according to the fifth and sixth aspects, the united perforated cylindrical shell is successively added from below to construct the perforated cylindrical shell while jacking up. The joining work can be performed at a fixed position close to the ground without using a large crane or the like, thereby improving workability, safety, and economy. In addition, it is easy to prepare a work environment such as automation of welding work, curing against wind, etc., and safety equipment such as handrails.
【図１】本願の請求項１、２に係る中実断面を有する複
合柱脚構造物の一実施形態を示したもので、(a) は柱脚
部分全体の斜視図、(b) は柱脚部分の水平断面図であ
る。FIG. 1 shows an embodiment of a composite column-base structure having a solid cross section according to claims 1 and 2 of the present application, wherein (a) is a perspective view of the entire column-base portion, and (b) is a column. It is a horizontal sectional view of a leg part.
【図２】本願の請求項３に係る中空断面を有する複合柱
脚構造物の一実施形態を示したもので、(a) は柱脚部分
全体の斜視図、(b) は柱脚部分の水平断面図である。FIG. 2 shows an embodiment of a composite column base structure having a hollow cross section according to claim 3 of the present application, wherein (a) is a perspective view of the entire column base portion, and (b) is a perspective view of the column base portion. It is a horizontal sectional view.
【図３】(a) 〜(d) はそれぞれ本願発明で使用する孔あ
き鋼板の一例を示す斜視図である。FIGS. 3A to 3D are perspective views each showing an example of a perforated steel plate used in the present invention.
【図４】(a) 、(b) は本願の請求項５に係る複合柱脚構
造物の構築方法における孔あき筒状鋼殻の構築の様子を
示す正面図である。FIGS. 4 (a) and 4 (b) are front views showing the construction of a perforated tubular steel shell in the method of constructing a composite column base structure according to claim 5 of the present application.
【図５】図４の工程に続くコンクリートの打設をスリッ
プフォーム工法を利用して行う場合の施工の様子を示す
鉛直断面図である。FIG. 5 is a vertical cross-sectional view showing a state of construction in the case where concrete is cast following the process of FIG. 4 by using a slip form method.
【図６】(a) 〜(c) はそれぞれ、図５のＡ−Ａ断面図、
Ｂ−Ｂ断面図、Ｃ−Ｃ断面図である。6 (a) to 6 (c) are cross-sectional views taken along line AA of FIG. 5,
It is BB sectional drawing and CC sectional drawing.
【図７】本願の請求項４に係る多柱複合柱脚構造物の一
実施形態を示す斜視図である。FIG. 7 is a perspective view showing an embodiment of a multi-column composite column base structure according to claim 4 of the present application.
１…孔あき筒状殻、１ａ…単位孔あき筒状殻、２…孔あ
き鋼板、３…コンクリート、４…円周方向接合部、５…
鉛直方向接合部、６…基礎、１１…フランジ、１２…ボ
ルト孔、１３…円周方向リブ、１４…鉛直方向リブ、１
８…つなぎ材、１９…ボルト孔、２１…筒状内殻、２２
…内鋼板、３１…フランジ鋼板、４０…複合柱脚、４２
…連結部材、５１…ジャッキアップ架台、５２…ジャッ
キ、５３…台車、６０…移動型枠、６１…主作業床、６
２…中作業床、６３…下作業床、６４…コンクリートホ
ッパ、６５…ジャッキ、６６…油圧ユニット、６７…型
枠、６８…ウインチ、６９…コンクリートバケット、７
０…レールDESCRIPTION OF SYMBOLS 1 ... Perforated cylindrical shell, 1a ... Unit perforated cylindrical shell, 2 ... Perforated steel plate, 3 ... Concrete, 4 ... Circumferential joint, 5 ...
Vertical joint, 6 ... Foundation, 11 ... Flange, 12 ... Bolt hole, 13 ... Circumferential rib, 14 ... Vertical rib, 1
8 ... connecting material, 19 ... bolt hole, 21 ... cylindrical inner shell, 22
... inner steel plate, 31 ... flange steel plate, 40 ... composite column base, 42
... Connecting member, 51 ... Jack-up stand, 52 ... Jack, 53 ... Truck, 60 ... Movable formwork, 61 ... Main work floor, 6
2. Middle working floor, 63 Lower working floor, 64 Concrete hopper, 65 Jack, 66 Hydraulic unit, 67 Formwork, 68 Winch, 69 Concrete bucket, 7
0 ... Rail
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊藤 洋 茨城県つくば市大字鬼ケ窪1043 株式会社 熊谷組技術研究所内 (72)発明者 村田 信之 東京都新宿区津久戸町２番１号 株式会社 熊谷組東京本社内 (72)発明者 粕田 金一 茨城県つくば市大字鬼ケ窪1043 株式会社 熊谷組技術研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Ito 1043 Oga-Kikubo, Tsukuba, Ibaraki Pref. Kumagai Gumi Technical Research Institute, Inc. (72) Inventor Murata Nobuyuki 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo In-house (72) Inventor Kinichi Kasuda 1043 Oga-Kikubo, Tsukuba, Ibaraki Pref.
Claims (6)
どうしを水平方向に連結して閉断面を有する単位孔あき
筒状殻を形成し、前記単位孔あき筒状殻を鉛直方向に複
数接合することにより孔あき筒状殻を形成し、前記孔あ
き筒状殻を内包するように所要のかぶりを設けてコンク
リートを打設してなることを特徴とする複合柱脚構造
物。1. A plurality of perforated steel plates arranged in a substantially vertical direction are connected in a horizontal direction to form a unit-perforated cylindrical shell having a closed cross section, and the unit-perforated cylindrical shells are arranged in a plurality in the vertical direction. A composite column base structure characterized by forming a perforated tubular shell by joining, and casting concrete with a required cover to include the perforated tubular shell.
有し、隣接する孔あき鋼板のフランジどうしを水平方向
にボルト接合することで単位孔あき筒状殻を形成してい
る請求項１記載の複合柱脚構造物。2. The perforated steel plate has flanges at both ends, and a unitary perforated tubular shell is formed by horizontally bolting flanges of adjacent perforated steel plates. A composite column base structure as described.
突出し柱軸方向に連続するつなぎ材が固定されており、
各孔あき鋼板のつなぎ材間に、両側端部にフランジを形
成してなる内鋼板を配置して連結することにより、前記
孔あき筒状殻の内側に閉断面を有する筒状内殻を形成
し、前記孔あき筒状殻を内包するように所要のかぶりを
設けて前記筒状内殻の外側にコンクリートを打設してな
ることを特徴とする請求項１または２記載の複合柱脚構
造物。3. A connecting member projecting in the center direction and continuing in the column axis direction is fixed to an inner surface side of the perforated steel sheet,
By connecting and connecting inner steel plates having flanges formed on both side ends between connecting members of each perforated steel plate, a cylindrical inner shell having a closed cross section is formed inside the perforated cylindrical shell. 3. The composite column base structure according to claim 1, wherein a required cover is provided so as to include the perforated cylindrical shell, and concrete is cast outside the cylindrical inner shell. Stuff.
造物を複数並列させ、前記複合柱脚構造物間を連結部材
で連結してなることを特徴とする多柱複合柱脚構造物。4. A multi-column composite column base structure, wherein a plurality of the composite column base structures according to claim 1, 2 or 3 are arranged in parallel, and the composite column base structures are connected by a connecting member. Stuff.
の構築方法であって、柱脚構造物構築位置にジャッキア
ップ装置を有するジャッキアップ架台を固定し、柱脚構
造物の最上部に位置する単位孔あき筒状殻を前記ジャッ
キアップ架台内に設置して略単位孔あき筒状殻の高さ分
ジャッキアップした後、順次、下側に位置する単位孔あ
き筒状殻を前記ジャッキアップ架台内に設置し、既にジ
ャッキアップされている上側の単位孔あき筒状殻と溶接
により連結する工程と、連結した複数の単位孔あき筒状
殻をさらに略単位孔あき筒状殻の高さ分ジャッキアップ
する工程とを、所要回数繰り返し、続いて柱脚構造物の
最下部に位置する単位孔あき筒状殻を上側の単位孔あき
筒状殻と溶接により連結して柱状の孔あき筒状殻を形成
し、前記孔あき筒状殻の外側に型枠を設置し、前記型枠
の内側にコンクリートを打設することを特徴とする複合
柱脚構造物の構築方法。5. The method for constructing a composite column base structure according to claim 1, wherein a jack-up stand having a jack-up device is fixed at a position where the column base structure is constructed, and an uppermost part of the column base structure. After the unit-perforated cylindrical shell located in the jack-up frame is jacked up by approximately the height of the unit-perforated cylindrical shell, the unit-perforated cylindrical shell positioned on the lower side is sequentially removed. A step of installing in a jack-up pedestal and connecting the upper unit-perforated cylindrical shell already jacked up by welding, and further connecting the connected unit-perforated cylindrical shells to a substantially unit-perforated cylindrical shell; The step of jacking up by the height is repeated a required number of times, and then the unit-perforated cylindrical shell located at the bottom of the column-base structure is connected to the upper unit-perforated cylindrical shell by welding to form a column-shaped hole. Forming a perforated cylindrical shell, said perforated cylindrical shape A method for constructing a composite column base structure, comprising: placing a formwork outside a shell; and casting concrete inside the formwork.
法であって、柱脚構造物構築位置にジャッキアップ装置
を有するジャッキアップ架台を固定し、柱脚構造物の最
上部に位置する単位孔あき筒状殻を前記ジャッキアップ
架台内に設置して略単位孔あき筒状殻の高さ分ジャッキ
アップした後、順次、下側に位置する単位孔あき筒状殻
を前記ジャッキアップ架台内に設置し、既にジャッキア
ップされている上側の単位孔あき筒状殻と溶接により連
結する工程と、連結した複数の単位孔あき筒状殻をさら
に略単位孔あき筒状殻の高さ分ジャッキアップする工程
とを、所要回数繰り返し、続いて柱脚構造物の最下部に
位置する単位孔あき筒状殻を上側の単位孔あき筒状殻と
溶接により連結して柱状の孔あき筒状殻を形成するとと
もに、前記孔あき筒状殻の内側に前記つなぎ材を介して
前記内鋼板からなる筒状内殻を形成し、前記孔あき筒状
殻の外側に型枠を設置し、前記型枠と筒状内殻との間に
コンクリートを打設することを特徴とする複合柱脚構造
物の構築方法。6. The method according to claim 3, wherein a jack-up pedestal having a jack-up device is fixed at a position where the column-base structure is constructed, and is located at the top of the column-base structure. After the unit-perforated cylindrical shell is set in the jack-up stand and jack-up by the height of the substantially unit-perforated cylindrical shell, the unit-perforated cylindrical shell located on the lower side is sequentially jacked-up. A step of welding and connecting the upper unit-perforated cylindrical shell already installed in the gantry to the upper unit-perforated cylindrical shell, and further connecting the plurality of connected unit-perforated cylindrical shells to a height of approximately unit-perforated cylindrical shell The step of jacking up by minutes is repeated the required number of times, and then the unit-perforated cylindrical shell located at the bottom of the column base structure is connected to the upper unit-perforated cylindrical shell by welding, and the column-shaped perforated cylinder is connected. And a perforated cylinder A cylindrical inner shell made of the inner steel plate is formed on the inner side of the shell through the connecting material, a mold is installed outside the perforated cylindrical shell, and a space between the mold and the cylindrical inner shell is formed. A method of constructing a composite column-base structure, wherein concrete is poured into a column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19367597A JPH1136232A (en) | 1997-07-18 | 1997-07-18 | Composite column base structure and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19367597A JPH1136232A (en) | 1997-07-18 | 1997-07-18 | Composite column base structure and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1136232A true JPH1136232A (en) | 1999-02-09 |
Family
ID=16311923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19367597A Withdrawn JPH1136232A (en) | 1997-07-18 | 1997-07-18 | Composite column base structure and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1136232A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007132054A (en) * | 2005-11-09 | 2007-05-31 | Sumitomo Mitsui Construction Co Ltd | Columnar structure |
| KR101222034B1 (en) | 2010-11-24 | 2013-01-15 | 재단법인 포항산업과학연구원 | Concrete-filled steel tube |
| CN104389268A (en) * | 2014-11-14 | 2015-03-04 | 中铁大桥局集团第二工程有限公司 | Steel tower column with positioning structure and hoisting construction method thereof |
| WO2015064821A1 (en) * | 2013-11-04 | 2015-05-07 | 삼성물산 (주) | Solid reinforced concrete post based on triangular rebar net arrangement and method for installing same |
| CN109183616A (en) * | 2018-09-27 | 2019-01-11 | 中交公路规划设计院有限公司 | Inside and outside double steel plate steel reinforced concrete synthetic rope tower structure and its assembling method of construction |
| CN112127282A (en) * | 2020-09-23 | 2020-12-25 | 北京市市政工程研究院 | Main pier steel structure of super bridge |
| CN114277670A (en) * | 2021-11-23 | 2022-04-05 | 中国建筑一局(集团)有限公司 | Prefabricated reinforced concrete beam column structure suitable for bridge construction |
-
1997
- 1997-07-18 JP JP19367597A patent/JPH1136232A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007132054A (en) * | 2005-11-09 | 2007-05-31 | Sumitomo Mitsui Construction Co Ltd | Columnar structure |
| JP4651509B2 (en) * | 2005-11-09 | 2011-03-16 | 三井住友建設株式会社 | Columnar structure |
| KR101222034B1 (en) | 2010-11-24 | 2013-01-15 | 재단법인 포항산업과학연구원 | Concrete-filled steel tube |
| WO2015064821A1 (en) * | 2013-11-04 | 2015-05-07 | 삼성물산 (주) | Solid reinforced concrete post based on triangular rebar net arrangement and method for installing same |
| US9915068B2 (en) | 2013-11-04 | 2018-03-13 | Samsung C&T Corporation | Solid reinforced concrete column based on arrangement of triangular reinforcing bar networks and method of constructing the same |
| CN104389268A (en) * | 2014-11-14 | 2015-03-04 | 中铁大桥局集团第二工程有限公司 | Steel tower column with positioning structure and hoisting construction method thereof |
| CN109183616A (en) * | 2018-09-27 | 2019-01-11 | 中交公路规划设计院有限公司 | Inside and outside double steel plate steel reinforced concrete synthetic rope tower structure and its assembling method of construction |
| CN112127282A (en) * | 2020-09-23 | 2020-12-25 | 北京市市政工程研究院 | Main pier steel structure of super bridge |
| CN114277670A (en) * | 2021-11-23 | 2022-04-05 | 中国建筑一局(集团)有限公司 | Prefabricated reinforced concrete beam column structure suitable for bridge construction |
| CN114277670B (en) * | 2021-11-23 | 2024-03-19 | 中国建筑一局(集团)有限公司 | Precast reinforced concrete beam column structure suitable for bridge construction |
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| A300 | Withdrawal of application because of no request for examination |
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