JP2013155514A - Pre-stressed concrete truss structure and method for manufacturing the same and form device - Google Patents

Pre-stressed concrete truss structure and method for manufacturing the same and form device Download PDF

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JP2013155514A
JP2013155514A JP2012016208A JP2012016208A JP2013155514A JP 2013155514 A JP2013155514 A JP 2013155514A JP 2012016208 A JP2012016208 A JP 2012016208A JP 2012016208 A JP2012016208 A JP 2012016208A JP 2013155514 A JP2013155514 A JP 2013155514A
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truss
prestressed concrete
diagonal
girder
vertical
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JP5984131B2 (en
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Tadahiko Tsutsumi
忠彦 堤
Yuji Sato
有次 左東
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Fuji PS Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a pre-stressed concrete truss beam for reducing member weights and a method for manufacturing the pre-stressed concrete truss beam.SOLUTION: Members such as an upper chord member, lower chord member, vertical member and diagonal member composed of concrete and reinforcing-bars are added with a pretension so that a truss unit can be configured, and a plurality of truss units are added with a pre-stress so as to be integrally connected so that a truss beam can be manufactured. Thus, it is possible to achieve the reduction of member weights.

Description

この発明は、道路橋や鉄道橋およびコンクリート構造物に使用されるプレストレストコンクリートトラス桁、プレストレストコンクリートトラス桁の製造方法およびプレストレスを導入する為の型枠装置に関するものである。   The present invention relates to a prestressed concrete truss girder used for road bridges, railway bridges, and concrete structures, a method for manufacturing a prestressed concrete truss girder, and a formwork apparatus for introducing prestress.

従来、プレテンション桁、セグメント桁等が提案されている。
例えば、トラス形式のセグメント桁では、特許文献に示すように上弦材および下弦材の導通孔を形成し、複数のトラスユニットを導通孔に挿通した緊張材で緊張して接続して桁が構築されていた。
しかし、斜材や鉛直材には、緊張材が挿通されていなかった。 Conventionally, a pretension beam, a segment beam, etc. have been proposed.
For example, in truss-type segment girders, as shown in the patent document, upper and lower chord material conduction holes are formed, and a plurality of truss units are tensioned and connected with a tension material inserted through the conduction holes to construct the girder. It was.
However, no tension material was inserted into the diagonal or vertical material.

実開昭４８−７１６２５号公報Japanese Utility Model Publication No. 48-71625

しかし、従来のプレテンション桁では、一方向にプレストレスを導入しているため、桁を分割することができず、運搬の都合から桁の長さが制限されると云う欠点が存在した。また、部材断面が大きく、桁重量も重いために運搬や架設に大型機械を必要とした。
一方、セグメント桁の場合は、部材断面が大きいため、ブロックの重量が重く、運搬や架設に大型機械が必要であると云う欠点が存在した。
また、一体化した桁は、重量が重く、桁断面も大きいため、桁にプレストレスを導入するためのＰＣ鋼材量が多くなる欠点が存在した。 However, in the conventional pretension beam, since prestress is introduced in one direction, the beam cannot be divided, and there is a disadvantage that the length of the beam is limited due to transportation convenience. Moreover, since the member cross section is large and the girder weight is heavy, a large machine is required for transportation and erection.
On the other hand, in the case of the segment girder, since the member cross section is large, the weight of the block is heavy, and there is a drawback that a large machine is required for transportation and erection.
Moreover, since the integrated girder is heavy and has a large girder cross section, there is a drawback that the amount of PC steel for introducing prestress into the girder increases.

本発明は、桁をトラス形状のユニットに分割して製造することで、ユニットの重量および桁の重量を低減することのできるとともに、上弦材、下弦材、鉛直材、斜材から構成されたトラスユニットのそれぞれの部材にプレストレスを導入し、何れの部材も圧縮力、引張力に抵抗することのできるプレストレストコンクリートトラス桁、その製造方法および型枠装置を提供するものである。   The present invention can reduce the weight of a unit and the weight of a girder by dividing a girder into truss-shaped units, and also includes a truss composed of upper chord material, lower chord material, vertical material, and diagonal material. A prestressed concrete truss girder in which prestress is introduced into each member of the unit and any member can resist compressive force and tensile force, a manufacturing method thereof, and a formwork apparatus are provided.

この発明は、以下のような内容である。
（１）本発明のプレストレストコンクリートトラス桁の製造方法は、コンクリートおよび鉄筋から成る上弦材、下弦材、鉛直材および斜材の各部材にプレテンションを加えてトラスユニットを構成し、前記トラスユニットを複数個、プレストレスを加えて一体的に連結して製造することを特徴とする。
（２）本発明のプレストレストコンクリートトラス構造は、コンクリートおよび鉄筋から成る上弦材、下弦材、鉛直材および斜材の各部材にプレテンションを加えてトラスユニットを構成したことを特徴とする。
（３）本発明のプレストレストコンクリートトラス桁の型枠装置は、本体枠組と、前記本体枠組内に配設された上弦材、下弦材、鉛直材および斜材の各部材要素を備えた型枠と、前記本体枠組の外周に配設されたプレテンション用の複数のジャッキとから成り、前記ジャッキは、前記型枠の上弦材、下弦材、鉛直材および斜材の各部材要素の延長線上にそれぞれ配設され、各部材に同時にプレストレスを導入することを特徴とする。 The present invention has the following contents.
(1) A method of manufacturing a prestressed concrete truss girder according to the present invention comprises a truss unit by applying pretension to each of an upper chord member, a lower chord member, a vertical member and a diagonal member made of concrete and reinforcing bars, A plurality of pre-stressed parts are integrally connected and manufactured.
(2) The prestressed concrete truss structure of the present invention is characterized in that a truss unit is configured by applying pretension to each member of an upper chord member, a lower chord member, a vertical member and a diagonal member made of concrete and reinforcing bars.
(3) A formwork apparatus for a prestressed concrete truss girder according to the present invention includes a main body frame, and a mold frame provided with each member element of an upper chord material, a lower chord material, a vertical material, and a diagonal material arranged in the main body frame. A plurality of pretensioning jacks arranged on the outer periphery of the main body frame, wherein the jacks are respectively on extension lines of the member elements of the upper chord member, the lower chord member, the vertical member and the diagonal member of the mold. It is arrange | positioned and introduce | transduces prestress into each member simultaneously, It is characterized by the above-mentioned.

この発明のプレストレストコンクリートトラス桁の製造方法によれば、コンクリートおよび鉄筋から成る上弦材、下弦材、鉛直材および斜材の各部材にプレテンションを加えてトラスユニットを構成し、前記トラスユニットを複数個、プレストレスを加えて一体的に連結して製造するので、現場でトラスユニットを連結して長いプレストレストコンクリートトラス桁を製造できるので、運搬に便利である。また、部材断面を小さくできるとともに、トラスユニットの重量も軽いため運搬や架設に大型機材を必要とせず、施工の省力化が可能となる。更に、ＰＣ鋼材の量を軽減でき、プレストレストコンクリートトラス桁の全体重量を軽減することができる。
また、本発明のプレストレストコンクリートトラス構造は、コンクリートおよび鉄筋から成る上弦材、下弦材、鉛直材および斜材の各部材にプレテンションを加えてトラスユニットを構成したので、いずれの部材も圧縮力と引張力に抵抗することができる。
また、本発明のプレストレストコンクリートトラス桁の型枠装置は、本体枠組と、前記本体枠組内に配設された上弦材、下弦材、鉛直材および斜材の各部材要素を備えた型枠と、前記本体枠組の外周に配設されたプレテンション用の複数のジャッキとから成り、前記ジャッキは、前記型枠の上弦材、下弦材、鉛直材および斜材の各部材要素の延長線上にそれぞれ配設され、各部材に同時にプレストレスを導入することができる。 According to the prestressed concrete truss girder manufacturing method of the present invention, a truss unit is configured by applying pretension to each of the upper chord member, the lower chord member, the vertical member and the diagonal member made of concrete and reinforcing bars, and a plurality of the truss units are provided. Since the individual and prestressed parts are integrally connected and manufactured, a long prestressed concrete truss girder can be manufactured by connecting the truss units at the site, which is convenient for transportation. In addition, the cross section of the member can be reduced, and the weight of the truss unit is light, so that large equipment is not required for transportation and erection, and construction labor can be saved. Furthermore, the amount of PC steel can be reduced, and the overall weight of the prestressed concrete truss girder can be reduced.
Further, the prestressed concrete truss structure of the present invention is configured by applying pretension to each of the upper chord member, lower chord member, vertical member and diagonal member made of concrete and reinforcing bars, so that each member has a compressive force. Can resist tensile forces.
The prestressed concrete truss girder formwork apparatus of the present invention includes a main body frame, and a formwork provided with each member element of upper chord material, lower chord material, vertical material and diagonal material disposed in the main body frame structure, A plurality of pre-tensioning jacks arranged on the outer periphery of the main body frame, and the jacks are respectively arranged on extension lines of the upper chord member, the lower chord member, the vertical member and the diagonal member of the mold. And prestress can be simultaneously introduced into each member.

図１は、本発明に使用されるプレストレストコンクリートトラスユニットの緊張方向を示す説明図である。FIG. 1 is an explanatory view showing a tension direction of a prestressed concrete truss unit used in the present invention. 図２は、同プレストレストコンクリートトラスユニットの正面図である。FIG. 2 is a front view of the prestressed concrete truss unit. 図３は、本発明の一実施の形態であるトラスユニットを使用したプレストレストコンクリートトラス桁の製造方法を示す説明図である。FIG. 3 is an explanatory view showing a method for manufacturing a prestressed concrete truss girder using a truss unit according to an embodiment of the present invention. 図４は、本発明のプレストレストコンクリートトラスを使用した箱桁構造の斜視図である。FIG. 4 is a perspective view of a box girder structure using the prestressed concrete truss of the present invention. 図５は、本発明のプレストレストコンクリートトラス桁の他の実施形態を示す説明図である。FIG. 5 is an explanatory view showing another embodiment of the prestressed concrete truss girder according to the present invention. 図６は、同プレストレストコンクリートトラス桁の製造工程を示す説明図である。FIG. 6 is explanatory drawing which shows the manufacturing process of the prestressed concrete truss girder. 図７は、本発明のプレストレストコンクリートトラス桁を製造する際に使用する型枠装置を示す説明図である。FIG. 7 is an explanatory view showing a formwork apparatus used when manufacturing the prestressed concrete truss girder of the present invention.

以下、一実施の形態を示す図面に基づいて、本発明を詳細に説明する。図１は本発明に使用されるプレストレストコンクリートトラスユニットの緊張方向を示す説明図、図２は本発明のプレストレストコンクリートトラスユニットの正面図である。ここで、本発明のプレストレストコンクリートのトラスユニット１０は、コンクリートおよび鉄筋から成る上弦材１１、下弦材１２、鉛直材１３および斜材１４の各部材に挿通したＰＣ鋼材１５にプレテンションを加えて構成されている。
プレテンションの方向は、上弦材１１では上弦材の軸線に沿って配設されたＰＣ鋼材１５にそれぞれＡ、Ｂ方向の引張力が導入される。下弦材１２についても下弦材の軸線に沿って配設されたＰＣ鋼材１５にそれぞれＡ、Ｂ方向の引張力が導入される。また、鉛直材１３については、鉛直材の軸線に沿って配設されたＰＣ鋼材１５にそれぞれＣ、Ｄ方向の引張力が導入される。斜材１４については、斜材の軸線に沿って配設されたＰＣ鋼材１５にそれぞれＥ、Ｆ方向の引張力が導入される。また、上弦材１１、下弦材１２、鉛直材１３には、トラスユニット１０を一体化する為のＰＣ鋼材を挿通するためのダクト１６が配設されている。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. FIG. 1 is an explanatory view showing the tension direction of a prestressed concrete truss unit used in the present invention, and FIG. 2 is a front view of the prestressed concrete truss unit of the present invention. Here, the truss unit 10 of the prestressed concrete of the present invention is configured by applying pretension to a PC steel material 15 inserted through each member of an upper chord member 11, a lower chord member 12, a vertical member 13 and a diagonal member 14 made of concrete and reinforcing bars. Has been.
In the direction of pretension, in the upper chord material 11, tensile forces in the A and B directions are respectively introduced into the PC steel material 15 disposed along the axis of the upper chord material. Also for the lower chord material 12, tensile forces in the A and B directions are respectively introduced into the PC steel material 15 disposed along the axis of the lower chord material. For the vertical member 13, tensile forces in the C and D directions are respectively introduced into the PC steel member 15 disposed along the axis of the vertical member. For the diagonal member 14, tensile forces in the E and F directions are respectively introduced into the PC steel member 15 disposed along the axis of the diagonal member. Further, the upper chord member 11, the lower chord member 12, and the vertical member 13 are provided with a duct 16 for inserting a PC steel material for integrating the truss unit 10.

図２は、このようにして製造されたプレストレストコンクリートトラスユニットの正面図である。本発明のトラスユニット１０は、上弦材１１、下弦材１２、鉛直材１３および斜材１４の各部材の内部に挿通したＰＣ鋼材１５にプレテンションを加えて構成されているので、トラス部材の断面の縮小化が図れる。   FIG. 2 is a front view of the prestressed concrete truss unit manufactured as described above. Since the truss unit 10 of the present invention is configured by applying pretension to the PC steel material 15 inserted into the members of the upper chord member 11, the lower chord member 12, the vertical member 13, and the diagonal member 14, the cross section of the truss member Can be reduced.

図３は、本発明の一実施の形態であるトラスユニットを使用したプレストレストコンクリートトラス桁１７の製造方法を示す説明図である。ここでは、トラスユニット１０を横方向に並べ、上弦材１１および下弦材１２にＰＣ鋼材を挿通して、それぞれ矢印方向にポストテンション方式で緊張してプレストレストコンクリートトラス桁１７を構成したものである。   FIG. 3 is an explanatory view showing a method of manufacturing the prestressed concrete truss girder 17 using the truss unit according to the embodiment of the present invention. Here, the truss units 10 are arranged in a horizontal direction, a PC steel material is inserted into the upper chord material 11 and the lower chord material 12, and each is tensioned by a post-tension method in the direction of an arrow to constitute a prestressed concrete truss girder 17.

図４は、本発明のプレストレストコンクリートトラスを使用した箱桁構造の斜視図である。ここでは、先ずポストテンション方式でプレストレストコンクリートトラス桁１７を一体化する。次に、適宜位置にプレストレストコンクリートトラス桁１７と直交するトラスユニット１０を挿入するとともにＰＣ鋼材で緊張して、プレストレストコンクリートトラス桁１７と一体化する。更に、現場打ち下床版１８および現場打ち上床版１９を打設するとともに、現場打ち下床版１８にＰＣ鋼材を挿通し、ポストテンション方式で緊張して箱桁を構築する。   FIG. 4 is a perspective view of a box girder structure using the prestressed concrete truss of the present invention. Here, the prestressed concrete truss girder 17 is first integrated by a post-tension method. Next, the truss unit 10 orthogonal to the prestressed concrete truss girder 17 is inserted at an appropriate position, and is tensioned with PC steel to be integrated with the prestressed concrete truss girder 17. Further, the on-site down floor slab 18 and the on-site down floor slab 19 are placed, and a PC steel material is inserted into the on-site down floor slab 18 and is tensioned by a post-tension method to construct a box girder.

図５、６は、本発明のプレストレストコンクリートトラス桁の他の実施形態を示す説明図である。本実施の形態では、先ず図６に示すようにトラスユニット１０で床平面２０を形成するとともに、床平面２０の両側にトラスユニット１０で壁部２１を構築する。また、壁部２１と直交するトラスユニット１０で桁２２を構築する。更に、図５に示すように床平面２０と平行に上平面２３が構築される。この形態では、上平面２３上に木製やコンクリート製等の板部材を敷設することで、歩道橋としての利用が可能である。   5 and 6 are explanatory views showing another embodiment of the prestressed concrete truss girder according to the present invention. In the present embodiment, the floor plane 20 is first formed by the truss unit 10 as shown in FIG. 6, and the wall portions 21 are constructed by the truss unit 10 on both sides of the floor plane 20. Further, the girder 22 is constructed by the truss unit 10 orthogonal to the wall portion 21. Further, as shown in FIG. 5, an upper plane 23 is constructed in parallel with the floor plane 20. In this form, by laying a plate member made of wood or concrete on the upper plane 23, it can be used as a pedestrian bridge.

図７は、本発明のプレストレストコンクリートトラス桁を製造する際に使用する型枠装置を示す説明図である。ここで型枠装置２５は、鋼材等で矩形状に形成された本体枠組２６と、本体枠組内に配設された上弦材１１、下弦材１２、鉛直材１３および斜材１４の各部材要素を備えた型枠２７と、本体枠組２６の外周に配設されたプレテンション用の複数のジャッキ２８とから成り、このジャッキ２８は、型枠２７の上弦材１１、下弦材１２、鉛直材１３および斜材１４の各部材要素の延長線上にそれぞれ配設されている。   FIG. 7 is an explanatory view showing a formwork apparatus used when manufacturing the prestressed concrete truss girder of the present invention. Here, the mold apparatus 25 includes a main body frame 26 formed in a rectangular shape with a steel material or the like, and each member element of the upper chord member 11, the lower chord member 12, the vertical member 13 and the diagonal member 14 disposed in the main body frame. The formed frame 27 and a plurality of pre-tensioning jacks 28 disposed on the outer periphery of the main body frame 26, and the jack 28 includes the upper chord member 11, the lower chord member 12, the vertical member 13, and the mold member 27. Each of the diagonal members 14 is disposed on an extension line of each member element.

以上のように構成された型枠装置２５は、本体枠組内に配設された上弦材１１、下弦材１２、鉛直材１３および斜材１４の各部材要素にＰＣ鋼材１５を張り渡した、各ジャッキ２８を緊張した後、各部材要素にコンクリートを打設する。コンクリートの硬化後、各ＰＣ鋼材１５を切断してトラスユニット１０を製造する。このようにして、各部材に同時にプレストレスを導入することができる。   The formwork apparatus 25 configured as described above includes a PC steel material 15 stretched over each member element of the upper chord member 11, the lower chord member 12, the vertical member 13, and the diagonal member 14 disposed in the main body frame. After tensioning the jack 28, concrete is placed on each member element. After the concrete is hardened, each of the PC steel materials 15 is cut to manufacture the truss unit 10. Thus, prestress can be simultaneously introduced into each member.

更に、本発明は上述の実施例に限定されることなく、特許請求の範囲の記載に基づいて種々の設計変更が可能である。   Furthermore, the present invention is not limited to the above-described embodiments, and various design changes can be made based on the description of the scope of claims.

１０ トラスユニット
１１ 上弦材
１２ 下弦材
１３ 鉛直材
１４ 斜材
１５ ＰＣ鋼材
１６ ダクト
１７ プレストレストコンクリートトラス桁
１８ 現場打ち下床版
１９ 現場打ち上床版
２０ 床平面
２１ 壁部
２２ 桁
２３ 上平面
２５ 型枠装置
２６ 本体枠組
２７ 型枠
２８ ジャッキ DESCRIPTION OF SYMBOLS 10 Truss unit 11 Upper chord material 12 Lower chord material 13 Vertical material 14 Diagonal material 15 PC steel material 16 Duct 17 Prestressed concrete truss girder 18 On-site lower floor slab 19 On-site upper floor slab 20 Floor plane 21 Wall 22 Girder 23 Upper plane 25 Formwork Device 26 Body frame 27 Mold frame 28 Jack

Claims (3)

コンクリートおよび鉄筋から成る上弦材、下弦材、鉛直材および斜材の各部材にプレテンションを加えてトラスユニットを構成し、
前記トラスユニットを複数個、プレストレスを加えて一体的に連結して製造することを特徴とするプレストレストコンクリートトラス桁の製造方法。 A truss unit is constructed by applying pre-tension to each of the upper chord material, lower chord material, vertical material and diagonal material made of concrete and reinforcing bar,
A method of manufacturing a prestressed concrete truss girder, wherein a plurality of the truss units are pre-stressed and integrally connected. コンクリートおよび鉄筋から成る上弦材、下弦材、鉛直材および斜材の各部材にプレテンションを加えてトラスユニットを構成したことを特徴とするプレストレストコンクリートトラス構造。   A prestressed concrete truss structure in which a truss unit is constructed by applying pretension to each member of upper chord material, lower chord material, vertical material and diagonal material made of concrete and reinforcing bars. 本体枠組と、前記本体枠組内に配設された上弦材、下弦材、鉛直材および斜材の各部材要素を備えた型枠と、前記本体枠組の外周に配設されたプレテンション用の複数のジャッキとから成り、
前記ジャッキは、前記型枠の上弦材、下弦材、鉛直材および斜材の各部材要素の延長線上にそれぞれ配設され、
各部材に同時にプレストレスを導入することを特徴とするプレストレストコンクリートトラス桁の型枠装置。 A main body frame, a mold having upper chord material, lower chord material, vertical material, and diagonal member elements arranged in the main body frame, and a plurality of pre-tensions arranged on the outer periphery of the main body frame Consisting of a jack
The jacks are respectively arranged on extension lines of the member elements of the upper chord member, the lower chord member, the vertical member and the diagonal member of the mold,
A formwork apparatus for prestressed concrete truss girder, wherein prestress is simultaneously introduced into each member.
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CN108005232A (en) * 2017-11-21 2018-05-08 中冶京诚工程技术有限公司 Structure system and house structure of prestressed pipe truss and latticed shell combination
CN109653076A (en) * 2018-12-24 2019-04-19 四川港航建设工程有限公司 Combined type flood control is passed the flood period lock head shellfish Lei Gangqiao and construction method
CN111809520A (en) * 2020-06-04 2020-10-23 中铁大桥勘测设计院集团有限公司 Method for realizing ultrahigh transition section of bridge deck of steel truss composite beam
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