JPH0723638B2 - PC hollow structural member - Google Patents
PC hollow structural memberInfo
- Publication number
- JPH0723638B2 JPH0723638B2 JP60177483A JP17748385A JPH0723638B2 JP H0723638 B2 JPH0723638 B2 JP H0723638B2 JP 60177483 A JP60177483 A JP 60177483A JP 17748385 A JP17748385 A JP 17748385A JP H0723638 B2 JPH0723638 B2 JP H0723638B2
- Authority
- JP
- Japan
- Prior art keywords
- structural member
- steel material
- hollow structural
- compressed
- fixing nut
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 65
- 239000010959 steel Substances 0.000 claims description 65
- 239000000463 material Substances 0.000 claims description 54
- 238000007906 compression Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 230000004308 accommodation Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000011178 precast concrete Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 239000004567 concrete Substances 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Rod-Shaped Construction Members (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は工場で製造されるプレストレトスコンクリー
ト（PC）桁等の中空構造部材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a hollow structural member such as a prestress concrete (PC) girder manufactured in a factory.
従来、工場で製造されるPC中空構造部材としては、実公
昭53−28263号公報により公表されているように、PC鋼
棒を挿通した２本の鉄管を上部に配置すると共に、２本
のPC鋼棒を下部に配置し、前記鉄管の中に挿通したPC鋼
棒を緊張定着して、そのPC鋼棒と鉄管とにストレスを導
入した状態で、コンクリートを打設して、全長にわたっ
て延長する円形孔を有するプレキャストコンクリート部
材（PC部材）を構成したものが知られている。Conventionally, as a PC hollow structure member manufactured in a factory, as disclosed in Japanese Utility Model Publication No. 53-28263, two iron pipes through which a PC steel rod is inserted are arranged at the top and two PCs are arranged. Place the steel rod in the lower part, tension and fix the PC steel rod inserted in the iron pipe, stress is introduced into the PC steel rod and the iron pipe, and place concrete and extend it over the entire length It is known that a precast concrete member (PC member) having a circular hole is configured.
しかるに、前記従来のPC中空構造部材の場合は、鉄管が
座屈する恐れがあり、かつ鉄管とコンクリートとの付着
力が弱いという問題がある。However, in the case of the conventional PC hollow structural member, there is a problem that the iron pipe may buckle and the adhesion between the iron pipe and the concrete is weak.
また鉄管がPC部材の端部まで延長しているので、鉄管内
のPC鋼棒の緊張力開放後にPC部材の上縁に引張応力が発
生し、かつPC部材の下側に配置されたPC鋼棒によるプレ
ストレスも、そのPC部材の下縁近くにPC鋼棒が配置され
ているので、PC部材の上縁には、やはり引張応力が発生
することになり、そのためPC部材の両端部を下から支持
した場合には、支点上の断面には荷重による圧縮応力が
生じないので、プレストレスによる引張応力がそのまま
残り、そのため引張応力に弱いコンクリートにとって有
害である。In addition, since the iron pipe extends to the end of the PC member, tensile stress occurs at the upper edge of the PC member after the tension of the PC steel rod inside the iron pipe is released, and the PC steel placed under the PC member is The prestressing by the rod also causes tensile stress to be generated at the upper edge of the PC member because the PC steel rod is placed near the lower edge of the PC member, so that both ends of the PC member are lowered. When supported from above, no compressive stress due to the load is generated in the cross section on the fulcrum, so tensile stress due to prestress remains as it is, which is harmful for concrete that is weak to tensile stress.
この発明は前述の問題を有利に解決できるPC中空構造部
材を提供することを目的とするものであって、この発明
の要旨とするところは、プレキャストコンクリートの中
空構造部材１における下縁部に、プレテンション方式で
部材全長にわたって緊張された複数の引張PC鋼材２が配
置され、前記中空構造部材１の上縁部のシース７内に、
押込ジャッキ収容用凹部４内の液圧式押込ジャッキ18に
よりポストコンプレッション方式で押込まれた圧縮PC鋼
材３が配置され、その圧縮PC鋼材３の端部は、定着ナッ
ト収容用凹部５内で圧縮PC鋼材３に螺合された定着ナッ
ト９により中空構造部材１に定着され、前記押込ジャッ
キ収容用凹部４および定着ナット収容用凹部５が存在す
る部分は充実断面になつていることを特徴とするPC中空
構造部材にある。The present invention aims to provide a PC hollow structure member that can advantageously solve the above-mentioned problems, and the gist of the present invention is to provide a lower edge portion in the hollow structure member 1 of precast concrete, A plurality of tensile PC steel materials 2 which are tensioned over the entire length of the member by the pretension method are arranged, and in the sheath 7 at the upper edge of the hollow structural member 1,
The compressed PC steel material 3 pushed by the post compression method by the hydraulic pressing jack 18 in the recess 4 for housing the push jack is arranged, and the end of the compressed PC steel material 3 is compressed PC steel material in the recess 5 for housing the fixing nut. A PC hollow characterized in that it is fixed to the hollow structural member 1 by a fixing nut 9 screwed to 3 and the portion where the pushing jack accommodating recess 4 and the fixing nut accommodating recess 5 are present has a solid cross section. In structural members.
次にこの発明を図示の例によって詳細に説明する。 The present invention will now be described in detail with reference to the illustrated example.
第１図ないし第４図はこの発明の実施例に係るPC中空構
造部材を示すものであって、プレキャストコンクリート
の中空構造部材１の下縁部にプレテンション方式で緊張
された複数本の引張PC鋼材２が埋設され、上段および中
段の引張PC鋼材２の両端部はビニルチューブまたはビニ
ルテープ等の付着絶縁材６により被覆され、中段の引張
PC鋼材２における付着絶縁材６の長さは上段の引張PC鋼
材２における付着絶縁材６の長さよりも短かくなってい
る。1 to 4 show a PC hollow structural member according to an embodiment of the present invention, in which a plurality of tensile PCs tensioned by a pre-tensioning method are applied to the lower edge of the hollow structural member 1 of precast concrete. Steel material 2 is buried, and both ends of the upper and middle tensile PC steel materials 2 are covered with an adhesive insulating material 6 such as a vinyl tube or vinyl tape.
The length of the adhering insulating material 6 in the PC steel material 2 is shorter than the length of the adhering insulating material 6 in the upper tensile PC steel material 2.
前記中空構造部材１の両端上縁部には押込ジャッキ収容
用凹部４および定着ナット収容用凹部５が設けられ、シ
ース７に挿通した複数本の圧縮PC鋼材３は中空構造部材
１の両端の押込ジャッキ収容用凹部４間にわたって延長
するように配置され、前記シース７は中空構造部材１の
上縁部に埋設され、さらに前記定着ナット収容用凹部５
内の部材端部側には鋼製定着板８が埋設され、前記圧縮
PC鋼材３はその両端から中空構造部材１の中央に向かっ
てポストコンプレッション方式で押込まれ、この状態
で、圧縮PC鋼材３に螺合されている定着ナット９が定着
板８に係合されて、圧縮PC鋼材３の端部が中空構造部材
１に定着されている。The hollow structure member 1 is provided at both upper edges with recesses 4 for accommodating a push jack and recesses 5 for accommodating a fixing nut, and a plurality of compressed PC steel materials 3 inserted into the sheath 7 are pressed at both ends of the hollow structure member 1. The sheath 7 is arranged so as to extend between the jack accommodating recesses 4, the sheath 7 is embedded in the upper edge of the hollow structural member 1, and the fixing nut accommodating recess 5 is provided.
A steel fixing plate 8 is embedded in the inner end of the member,
The PC steel material 3 is pushed from both ends toward the center of the hollow structural member 1 by a post compression method, and in this state, the fixing nut 9 screwed to the compression PC steel material 3 is engaged with the fixing plate 8, The end of the compressed PC steel material 3 is fixed to the hollow structural member 1.
また前記中空構造部材１には、配力筋，通し筋，スター
ラップ筋，上部主鉄筋（それぞれ図示を省略した）およ
び空間形成用内部型枠10等が埋設され、中空構造部材１
の両端部における押込ジャッキ収容用凹部４および定着
ナット収容用凹部５が存在する部分は充実断面になって
いる。Further, the hollow structural member 1 is embedded with a distribution bar, a through bar, a stirrup bar, an upper main rebar (each not shown), an internal formwork 10 for forming a space, etc.
The portions where the push-in jack accommodation recess 4 and the fixing nut accommodation recess 5 are present at both ends of the are of a solid cross section.
次に前記実施例のPC中空構造部材の製造例について説明
する。Next, a production example of the PC hollow structure member of the above-mentioned embodiment will be described.
まず第５図および第６図に示すように、水平な底部型枠
11を並列に並べられた多数の枕木12にわたって載置し、
かつ引張PC鋼材２の両端部を付着絶縁材により被覆し、
その引張PC鋼材２を底部型枠11の上方に沿って延長する
ように配置して２基のアバット13,14間に張り渡し、そ
の引張PC鋼材２に所定の引張力を与える。First, as shown in FIGS. 5 and 6, a horizontal bottom formwork is used.
Place 11 over a large number of sleepers 12 arranged in parallel,
Moreover, both ends of the tensile PC steel material 2 are covered with an adhesive insulating material,
The tensile PC steel material 2 is arranged so as to extend along the upper part of the bottom mold 11 and is stretched between the two abutments 13 and 14 to apply a predetermined tensile force to the tensile PC steel material 2.
次に底部型枠11の上部において、配力筋，通し筋，スタ
ーラップ筋等を組立てたのち、底部型枠11の上に側部型
枠15,部材端部型枠16,内部型枠10等を配置し、かつ圧縮
PC鋼材３を挿通したシース７を、部材上縁部に位置する
ように配置し、さらに押込ジャッキ用凹部形成型枠およ
び定着ナット用凹部形成型枠（それぞれ図示を省略し
た）と鋼製定着板８（第４図参照）とに圧縮PC鋼材３を
挿通し、各凹部形成型枠を、左右の側部型枠15の上部に
架設固定された支持部材に固定し、定着ナット用凹部形
成型枠内において圧縮PC鋼材３に定着ナット９（第４図
参照）を螺合しておく。Next, in the upper part of the bottom mold 11, after assembling the distribution muscles, the through muscles, the stirrup muscles, etc., the side molds 15, the member end molds 16, the inner molds 10 are placed on the bottom mold 11. Etc., and compress
A sheath 7 having the PC steel material 3 inserted therein is arranged so as to be positioned at the upper edge of the member, and further, a recess forming mold for a pushing jack and a recess forming mold for a fixing nut (each not shown) and a steel fixing plate. 8 (see FIG. 4), the compression PC steel material 3 is inserted, and each recess forming mold is fixed to a supporting member which is fixedly installed above the left and right side molds 15 to form a fixing nut recess forming mold. The fixing nut 9 (see FIG. 4) is screwed onto the compressed PC steel material 3 in the frame.
次に上部主鉄筋を配置し、かつ部材長手方向に直角な方
向の横締めを行なう位置に、横締孔形成用シース17を配
置する。Next, the upper main reinforcing bar is arranged, and the lateral tightening hole forming sheath 17 is arranged at a position for lateral tightening in a direction perpendicular to the longitudinal direction of the member.
次にコンクリートを打設し、そのコンクリートが所定の
強度に達したのち脱型し、次いで引張PC鋼材２の緊張力
を解放することにより、引張PC鋼材２とコンクリートと
の付着力により中空構造部材１の下縁部に圧縮力を与え
る。次に中空構造部材１の端部から突出している引張PC
鋼材２を溶断して除去する。Next, concrete is poured, and after the concrete reaches a predetermined strength, it is demolded, and then the tension force of the tensile PC steel material 2 is released, so that the hollow structural member is formed by the adhesive force between the tensile PC steel material 2 and the concrete. A compressive force is applied to the lower edge of 1. Next, the tensile PC protruding from the end of the hollow structural member 1
The steel material 2 is fused and removed.
次に第７図に示すように、中空構造部材１の両端上部の
押込ジャッキ収容用凹部４内に液圧式押込ジャッキ18を
収容し、その押込ジャッキ18のシリンダを凹部４におけ
る部材端部側の側面により支承すると共に、押込ジャッ
キ18のピストン杆の先端部に嵌合した鋼製環状保持具19
に圧縮PC鋼材３の端部を挿通し、押込ジャッキ18により
圧縮PC鋼材３を中空構造部材１の中央側に向かって押込
んで、その圧縮PC鋼材３に所定の縮み量を与え、この状
態を保ちながら、圧縮PC鋼材３に螺合されている定着ナ
ット９を回転して鋼製定着板８に係合させて、圧縮PC鋼
材３の端部を中空構造部材１に定着することにより、中
空構造部材１にプレストレスを導入する。Next, as shown in FIG. 7, the hydraulic pushing jack 18 is housed in the pushing jack receiving recesses 4 on both upper ends of the hollow structure member 1, and the cylinder of the pushing jack 18 is located at the member end side of the recess 4. A steel annular holder 19 which is supported by the side surface and is fitted to the tip of the piston rod of the pushing jack 18
Insert the end of the compressed PC steel material 3 into the, and push the compressed PC steel material 3 toward the center side of the hollow structural member 1 by the pushing jack 18 to give the compressed PC steel material 3 a predetermined amount of shrinkage, While maintaining, the fixing nut 9 screwed to the compressed PC steel material 3 is rotated to engage with the steel fixing plate 8 to fix the end portion of the compressed PC steel material 3 to the hollow structural member 1, thereby making it hollow. Prestress is introduced into the structural member 1.
次にシース７と圧縮PC鋼材３との間にモルタルグラウト
を注入し、かつ押込ジャッキ18を撤去して各凹部4,5内
にモルタルまたはコンクリートを充填する。Next, mortar grout is injected between the sheath 7 and the compressed PC steel material 3, and the pushing jack 18 is removed to fill the recesses 4 and 5 with mortar or concrete.
中空構造部材１の両端上部に押込ジャッキ収容用凹部４
および定着ナット収容用凹部５を設けると、中空構造部
材１の両端に断面欠損部が生じ、中空構造部材１の両端
の耐力が低下するが、この発明においては、中空構造部
材１のおける押込ジャッキ収容用凹部４および定着ナッ
ト収容用凹部５が位置する部分の断面を充実断面として
いるので、中空構造部材１の両端の耐力低下を防止する
ことができる。The hollow structure member 1 has recesses 4 for accommodating the pushing jacks at the upper ends thereof.
When the fixing nut accommodation recess 5 is provided, the hollow structural member 1 has a cross-sectional defective portion at both ends, and the proof stress of both ends of the hollow structural member 1 is reduced. Since the cross section of the portion where the accommodating recess 4 and the fixing nut accommodating recess 5 are located is a solid cross section, it is possible to prevent the yield strength of both ends of the hollow structural member 1 from decreasing.
引張PC鋼材２を中空構造部材１の下縁部において直線状
に配置した場合は、中空構造部材の支点上の断面では、
上縁部に引張応力が発生し、ひび割れの原因となるの
で、プレストレスを改善するために、引張PC鋼材２の両
端に、所定長さにわたって付着絶縁材６を被着するのが
好ましい。When the tensile PC steel material 2 is linearly arranged at the lower edge of the hollow structural member 1, in the cross section on the fulcrum of the hollow structural member,
Since tensile stress is generated at the upper edge and causes cracking, it is preferable to adhere the adhering insulating material 6 to both ends of the tensile PC steel material 2 for a predetermined length in order to improve the prestress.
また圧縮PC鋼材３は設計荷重作用時における部材上縁部
の圧縮応力度がコンクリートの許容曲げ圧縮応力度を越
える部分に配置するだけでよい。圧縮PC鋼材３を部材端
まで延長すると、部材の支点断面上縁部に常時引張応力
が発生し、コンクリートのひび割れの原因となる。Further, the compressed PC steel material 3 need only be arranged in a portion where the compressive stress at the upper edge of the member under the design load exceeds the allowable bending compressive stress of concrete. When the compressed PC steel material 3 is extended to the end of the member, tensile stress is constantly generated at the upper edge of the fulcrum cross section of the member, which causes cracking of concrete.
この発明によれば、プレキャストコンクリートの中空構
造部材１における下縁部に、プレテンション方式で部材
全長にわたって緊張された複数の引張PC鋼材２が配置さ
れ、前記中空構造部材１の上端部のシース７内に、押込
ジャッキ収容用凹部４内の液圧式押込ジャッキ18により
ポストコンプレッション方式で押込まれた圧縮PC鋼材３
が配置され、その圧縮PC鋼材３の端部は、定着ナット収
容用凹部５内で圧縮PC鋼材３に螺合された定着ナット９
により中空構造部材１に定着され、前記押込ジャッキ収
容用凹部４および定着ナット収容用凹部５が存在する部
分は充実断面になつているので中空構造部材１の上縁部
に圧縮PC鋼材３を配置してこれを押込むことにより、そ
の圧縮PC鋼材３にポストコンプレッション方式で圧縮力
を与えて、その圧縮PC鋼材３の端部を中空構造部材１に
定着するので、その圧縮PC鋼材３により中空構造部材１
の上縁部に引張応力を付与しておくことができ、そのた
め荷重により中空構造部材１の上縁部に発生する圧縮応
力を軽減して、中空構造部材１の上縁部の耐力を増大さ
せることができるので、中空構造部材１の部材厚を、よ
り薄くすることができ、さらに中空構造部材１の高さを
小さくできるので、中空構造部材１の自重による反力を
減少させることができ、また中空構造部材１の両端部に
おける押込ジャッキ収容用凹部４および定着ナット収容
用凹部５が存在する部分は充実断面になっているので、
前記凹部4,5を設けることによる中空構造部材１の両端
の耐力低下を防止することができる等の効果が得られ
る。According to the present invention, a plurality of tensile PC steel materials 2 which are strained by the pretensioning method over the entire length of the hollow structure member 1 of precast concrete are arranged at the lower edge portion, and the sheath 7 at the upper end of the hollow structure member 1 is arranged. Compressed PC steel material 3 pushed in by a post-compression method by the hydraulic push jack 18 in the push jack housing recess 4
And the end of the compressed PC steel material 3 has a fixing nut 9 screwed into the compressed PC steel material 3 in the fixing nut accommodating recess 5.
The compressed PC steel material 3 is arranged at the upper edge of the hollow structural member 1 since the portion where it is fixed to the hollow structural member 1 and has the depression 4 for accommodating the pushing jack and the recess 5 for accommodating the fixing nut has a solid cross section. Then, by pushing this, a compressive force is applied to the compressed PC steel material 3 by the post compression method, and the end of the compressed PC steel material 3 is fixed to the hollow structural member 1, so that the compressed PC steel material 3 is hollow. Structural member 1
A tensile stress can be applied to the upper edge of the hollow structural member 1, so that the compressive stress generated in the upper edge of the hollow structural member 1 due to the load is reduced and the yield strength of the upper edge of the hollow structural member 1 is increased. Therefore, the thickness of the hollow structural member 1 can be further reduced, and the height of the hollow structural member 1 can be reduced, so that the reaction force due to the weight of the hollow structural member 1 can be reduced. Further, since the portions where the push-in jack housing recess 4 and the fixing nut housing recess 5 are present at both ends of the hollow structure member 1 have a solid cross section,
By providing the recesses 4 and 5, it is possible to obtain an effect such as a reduction in yield strength of both ends of the hollow structural member 1.
第１図ないし第４図はこの発明の実施例を示すものであ
って、第１図は中空構造部材と引張PC鋼材と圧縮PC鋼材
との配置関係を示す一部縦断側面図、第２図は第１図の
Ａ−Ａ線拡大断面図、第３図は第１図のＢ−Ｂ線拡大断
面図、第４図は圧縮PC鋼材の定着部付近を示す拡大縦断
側面図である。第５図ないし第７図はこの発明のPC中空
構造部材の製造例を示すものであって、第５図は型枠と
引張PC鋼材と圧縮PC鋼材との配置状態を示す概略側面
図、第６図は型枠内の引張PC鋼材と圧縮PC鋼材と内部型
枠との配置状態を示す縦断正面図、第７図は圧縮PC鋼材
を押込定着するときの状態を示す縦断側面図である。 図において、１は中空構造部材、２は引張PC鋼材、３は
圧縮PC鋼材、４は押込ジャッキ収容用凹部、５は定着ナ
ット収容用凹部、６は付着絶縁材、７はシース、８は鋼
製定着板、９は定着ナット、10は空間形成用内部型枠、
18は液圧式押込ジャッキである。1 to 4 show an embodiment of the present invention, and FIG. 1 is a partially longitudinal side view showing the positional relationship between a hollow structural member, a tensile PC steel material and a compressed PC steel material, and FIG. 1 is an enlarged sectional view taken along the line AA in FIG. 1, FIG. 3 is an enlarged sectional view taken along the line BB in FIG. 1, and FIG. 4 is an enlarged longitudinal side view showing the vicinity of the fixing portion of the compressed PC steel material. 5 to 7 show a production example of the PC hollow structural member of the present invention, and FIG. 5 is a schematic side view showing an arrangement state of a mold, a tensile PC steel material and a compressed PC steel material, FIG. 6 is a vertical sectional front view showing the arrangement state of the tensile PC steel material, the compressed PC steel material, and the internal formwork in the mold, and FIG. 7 is a vertical side view showing the state when the compressed PC steel material is pushed and fixed. In the figure, 1 is a hollow structural member, 2 is a tensile PC steel material, 3 is a compression PC steel material, 4 is a depression jack accommodation recess, 5 is a fixing nut accommodation recess, 6 is an insulating adhesive material, 7 is a sheath, 8 is steel. Fixing plate, 9 fixing nut, 10 internal mold for space formation,
18 is a hydraulic push jack.
Claims (1)
１における下縁部に、プレテンション方式で部材全長に
わたって緊張された複数の引張PC鋼材２が配置され、前
記中空構造部材１の上縁部のシース７内に、押込ジャッ
キ収容用凹部４内の液圧式押込ジャッキ18によりポスト
コンプレッション方式で押込まれた圧縮PC鋼材３が配置
され、その圧縮PC鋼材３の端部は、定着ナット収容用凹
部５内で圧縮PC鋼材３に螺合された定着ナット９により
中空構造部材１に定着され、前記押込ジャッキ収容用凹
部４および定着ナット収容用凹部５が存在する部分は充
実断面になつていることを特徴とするPC中空構造部材。1. A plurality of tensile PC steel materials 2 which are strained over the entire length of a precast concrete hollow structural member 1 by a pretensioning method are arranged at the lower edge of the hollow structural member 1, and a sheath 7 at the upper edge of the hollow structural member 1 is provided. Inside, the compressed PC steel material 3 pushed in by the post compression method by the hydraulic type pushing jack 18 in the depression jack accommodation recess 4 is arranged, and the end of the compression PC steel material 3 is placed in the fixing nut accommodation recess 5. It is fixed to the hollow structural member 1 by a fixing nut 9 screwed to the compressed PC steel material 3, and the portion where the pushing jack accommodating recess 4 and the fixing nut accommodating recess 5 are present has a solid cross section. A PC hollow structural member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177483A JPH0723638B2 (en) | 1985-08-14 | 1985-08-14 | PC hollow structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60177483A JPH0723638B2 (en) | 1985-08-14 | 1985-08-14 | PC hollow structural member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6241852A JPS6241852A (en) | 1987-02-23 |
| JPH0723638B2 true JPH0723638B2 (en) | 1995-03-15 |
Family
ID=16031694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60177483A Expired - Lifetime JPH0723638B2 (en) | 1985-08-14 | 1985-08-14 | PC hollow structural member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723638B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009185488A (en) * | 2008-02-05 | 2009-08-20 | Taisei Corp | Precast concrete beams |
| JP2012154168A (en) * | 2012-04-09 | 2012-08-16 | Taisei Corp | Precast concrete beam |
| KR101356675B1 (en) * | 2011-06-30 | 2014-01-28 | 김찬녕 | Structural girder using a loading anchor system for girder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020077843A (en) * | 2002-08-23 | 2002-10-14 | 강신량 | Carbon fiber wire and concrete composited pre-stress material and method of the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538659Y2 (en) * | 1976-08-16 | 1980-09-10 |
-
1985
- 1985-08-14 JP JP60177483A patent/JPH0723638B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009185488A (en) * | 2008-02-05 | 2009-08-20 | Taisei Corp | Precast concrete beams |
| KR101356675B1 (en) * | 2011-06-30 | 2014-01-28 | 김찬녕 | Structural girder using a loading anchor system for girder |
| JP2012154168A (en) * | 2012-04-09 | 2012-08-16 | Taisei Corp | Precast concrete beam |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6241852A (en) | 1987-02-23 |
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