JP4538368B2 - Manufacturing method of corrugated steel web PC girder - Google Patents

Manufacturing method of corrugated steel web PC girder Download PDF

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JP4538368B2
JP4538368B2 JP2005132246A JP2005132246A JP4538368B2 JP 4538368 B2 JP4538368 B2 JP 4538368B2 JP 2005132246 A JP2005132246 A JP 2005132246A JP 2005132246 A JP2005132246 A JP 2005132246A JP 4538368 B2 JP4538368 B2 JP 4538368B2
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浩良 渡辺
隆洋 角田
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株式会社ピーエス三菱
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本発明は、波形鋼板ウエブを用いたプレキャスト波形鋼板ウエブＰＣ桁を製造する波形鋼板ウエブＰＣ桁の製造方法に関する。   The present invention relates to a method of manufacturing a corrugated steel web PC girder for producing a precast corrugated steel web PC girder using a corrugated steel web.

長大な橋梁を建設する場合、橋台や橋脚などの下部構造物の構築と並行して、上部構造物の橋体を製作する、いわゆるプレキャストセグメント工法の採用が増大してきている。この工法によれば、短工期で長大な橋梁の建設が可能となることと、設備の整った工場または隣接製作ヤードで高品質なコンクリートセグメントが得られることなどの利点がある。この場合、橋体を輪切りにした形状のプレキャストコンクリートセグメントを用いて橋梁を建設する。   When constructing a long bridge, the so-called precast segment construction method for producing a bridge body of an upper structure is increasing in parallel with the construction of a lower structure such as an abutment or a pier. According to this construction method, there is an advantage that a long bridge can be constructed in a short construction period and a high-quality concrete segment can be obtained in a well-equipped factory or an adjacent production yard. In this case, the bridge is constructed using a precast concrete segment having a shape obtained by cutting the bridge body into a ring.

従来より、プレキャストセグメント工法におけるコンクリートセグメントの製作方法としては、マッチキャスト方式および仕切り板方式が知られている。   Conventionally, a match cast method and a partition plate method are known as a method for producing a concrete segment in the precast segment method.

マッチキャスト方式は、先行製作コンクリートセグメントの端面を、後行製作コンクリートセグメントの端面の型枠として用い、後行製作コンクリートセグメントのコンクリートを打設し、端面形状が完全に一致するコンクリートセグメントを製作する方式である。従って、マッチキャスト方式によれば、コンクリートセグメントの組み立て時の接合面が精度よく構築される。   The match cast method uses the end face of the prefabricated concrete segment as a formwork for the end face of the postfabricated concrete segment, and casts the concrete of the postfabricated concrete segment to produce a concrete segment whose end face shape matches perfectly. It is a method. Therefore, according to the match cast method, the joint surface when assembling the concrete segment is constructed with high accuracy.

また、仕切り板方式は、製作するコンクリートセグメントの長さごとに仕切り板を装入した型枠にコンクリートを打設して、複数のコンクリートセグメントを一度に製作する方式である（例えば、非特許文献１参照。）。   In addition, the partition plate method is a method in which concrete is placed in a formwork in which a partition plate is inserted for each length of a concrete segment to be manufactured, and a plurality of concrete segments are manufactured at one time (for example, non-patent literature). 1).

上述したマッチキャスト方式では、先行製作コンクリートセグメントを事前に製作しておく必要があり、一方、仕切り板方式では複数のコンクリートセグメントを一度に製作することができるため、仕切り板方式によれば、マッチキャスト方式を用いてコンクリートセグメントを製作するよりも短工期で多数のコンクリートセグメントを製作することができる。   In the above-mentioned match cast method, it is necessary to make a pre-manufactured concrete segment in advance. On the other hand, in the partition plate method, a plurality of concrete segments can be manufactured at one time. A large number of concrete segments can be manufactured in a shorter construction period than when a concrete segment is manufactured using a casting method.

近年、波形鋼板をウエブに用いた波形鋼板ウエブ桁が開発され、実用化されている。波形鋼板ウエブ桁では、自重の２５％程度を占めるウエブにコンクリートよりも軽量な鋼板を用いることによって上部構造物自重の大幅な軽減を図ることができる。従って、下部構造物の小型化が可能であり、工費が縮減される。また、コンクリートウエブが不要であることから、型枠や鉄筋の組み立て解体作業が軽減され、施工の省力化および工期短縮が可能となる。   In recent years, corrugated steel web girders using corrugated steel sheets for webs have been developed and put into practical use. In the corrugated steel web girder, the weight of the upper structure can be significantly reduced by using a steel plate that is lighter than concrete for the web that occupies about 25% of its own weight. Therefore, it is possible to reduce the size of the lower structure and reduce the construction cost. In addition, since a concrete web is not required, the work of assembling and disassembling the formwork and reinforcing bars is reduced, and labor saving and shortening of the construction period are possible.

このような利点を有する波形鋼板ウエブ桁は、従来より場所打ち工法によって製造されているが、上述したプレキャストセグメント工法を適用して波形鋼板ウエブ桁を製造することによって、更なる施工の省力化や工期短縮、工期短縮による工費縮減が可能となる。特に、プレキャストセグメント工法のうちの仕切り板方式を適用すれば、工期短縮の効果が大きい。
「プレキャストブロック工法によるプレストレストコンクリートＴげた道路橋・設計施工指針」，社団法人日本道路協会，平成４年１０月５日，ｐ．２８ Corrugated steel sheet web girders having such advantages have been conventionally manufactured by the cast-in-place method, but by producing the corrugated steel sheet web girders by applying the precast segment method described above, further labor-saving can be achieved. The construction cost can be reduced by shortening the construction period and shortening the construction period. In particular, if the partition plate method of the precast segment method is applied, the effect of shortening the work period is great.
“Prestressed concrete T bridge road bridge design and construction guidelines by precast block method”, Japan Road Association, October 5, 1992, p. 28

一般に、打設されたコンクリートは、硬化する際に収縮する特性を有することが知られている。   In general, it is known that cast concrete has a property of shrinking when it is cured.

従って、波形鋼板ウエブ桁を製造するにあたってプレキャストセグメント工法を適用し、波形鋼板を配設した上下床版型枠にコンクリートを打設すると、波形鋼板は収縮しないことから、打設されたコンクリートが硬化した際に、コンクリートの桁長手方向収縮量と等しい量だけ、セグメントの端面から波形鋼板が突出するおそれがある。その結果、端面から突出した波形鋼板が障害となって、現場にてセグメントを連結する場合にコンクリート目地処理に困難性が生ずるといった問題が生じる。   Therefore, when the precast segment method is applied to manufacture the corrugated steel web girder and concrete is placed on the upper and lower floor slabs on which the corrugated steel is disposed, the corrugated steel does not shrink, so the placed concrete is hardened. When this occurs, the corrugated steel sheet may protrude from the end face of the segment by an amount equal to the amount of shrinkage in the longitudinal direction of the concrete. As a result, the corrugated steel plate protruding from the end face becomes an obstacle, and there arises a problem that the concrete joint processing becomes difficult when the segments are connected at the site.

本発明は、上記事情に鑑み、波形鋼板ウエブＰＣ桁をプレキャストセグメント工法で製造する波形鋼板ウエブＰＣ桁の合理的な製造方法を提供することを目的とするものである。尚、本発明において、ＰＣ桁としては、ウエブが単列のＰＣＴ桁、ウエブが複数列のＰＣ箱桁を包含する。   In view of the above circumstances, an object of the present invention is to provide a rational manufacturing method of a corrugated steel web PC girder for producing a corrugated steel web PC girder by a precast segment method. In the present invention, the PC girder includes a single row PCT girder and a plurality of PC box girder webs.

上記目的を達成する本発明の波形鋼板ウエブＰＣ桁の製造方法は、波形鋼板ウエブを用いたＰＣ桁セグメントを製造するに当り、桁長手方向に隣接するセグメントの波形鋼板同士を隙間を介して突合せ、仮添接板で結合し、その波形鋼板にそれぞれ上下床版型枠を取付け、隣接上下床版型枠間に上記隙間より薄い仕切板を挟んでコンクリートを打設することを特徴とする。   The manufacturing method of the corrugated steel web PC girder according to the present invention that achieves the above object is to produce a PC girder segment using the corrugated steel web by matching the corrugated steel plates of the segments adjacent in the longitudinal direction of the girder through a gap. The upper and lower floor slab forms are attached to the corrugated steel plates, and concrete is placed with a partition plate thinner than the gap between adjacent upper and lower floor slab forms.

本発明の波形鋼板ウエブＰＣ桁の製造方法は、隣接上下床版型枠間に上記隙間より薄い仕切板を挟んでコンクリートを打設するものであるため、コンクリートが打設される段階では、隙間寸法と仕切板の厚さ寸法との差分だけ、それぞれの波形鋼板が、隣接する床版コンクリートのそれぞれの端面よりも引っ込んだ状態で配設されることとなる。その結果、打設されたコンクリートが硬化収縮したとしても、隙間寸法と仕切板の厚さ寸法との差分で、床版コンクリートの桁長手方向収縮量が相殺され、格別な目地処理等を要することなく、製造された各ＰＣ桁セグメントの床版コンクリートの端面同士を接合することができる。   Since the method for manufacturing the corrugated steel web PC girder according to the present invention is for placing concrete with a partition plate thinner than the above gap between adjacent upper and lower floor slab formwork, at the stage where the concrete is placed, Each corrugated steel sheet is disposed in a state of being retracted from each end face of the adjacent floor slab concrete by the difference between the dimension and the thickness dimension of the partition plate. As a result, even if the cast concrete is hardened and shrunk, the difference between the gap dimension and the thickness of the partition plate offsets the amount of shrinkage in the longitudinal direction of the floor slab concrete and requires special joint treatment, etc. The end surfaces of the floor slab concrete of each manufactured PC girder segment can be joined together.

従って、本発明の波形鋼板ウエブＰＣ桁の製造方法によれば、波形鋼板ウエブを用いたＰＣ桁セグメントを、従来と同様の仕切り板方式で製造することができ、波形鋼板ウエブＰＣ桁の施工の省力化や工期短縮、工期短縮による工費縮減が可能となる。   Therefore, according to the manufacturing method of the corrugated steel web PC girder of the present invention, the PC girder segment using the corrugated steel web can be manufactured by the same partition plate method as that of the prior art. The labor cost can be reduced by saving labor, shortening the construction period, and shortening the construction period.

ここで、上記本発明の波形鋼板ウエブＰＣ桁の製造方法は、上記隙間寸法と上記仕切板の厚さ寸法との差が床版コンクリートの桁長手方向収縮量と等しいか又はこれより僅か大きいことが好ましい。このような好ましい形態によれば、製造された各ＰＣ桁セグメントの床版コンクリートの端面同士、および波形鋼板同士を、精度良く接合することができる。   Here, in the manufacturing method of the corrugated steel web PC girder according to the present invention, the difference between the gap dimension and the thickness dimension of the partition plate is equal to or slightly larger than the longitudinal contraction amount of the slab concrete. Is preferred. According to such a preferable form, the end surfaces of floor slab concrete of each manufactured PC girder segment and corrugated steel sheets can be joined with high accuracy.

本発明の波形鋼板ウエブＰＣ桁の製造方法によれば、コンクリートが打設される段階では、隙間寸法と仕切板の厚さ寸法との差分だけ、それぞれの波形鋼板が、隣接する床版コンクリートのそれぞれの端面よりも引っ込んだ状態で配設されることとなる。従って、打設されたコンクリートが硬化収縮したとき、その差分で、床版コンクリートの桁長手方向収縮量が相殺され、格別な目地処理等を要することなく、製造された各ＰＣ桁セグメントの床版コンクリートの端面同士を、通常の接合手段によって、精度良く接合することができる。   According to the method for manufacturing a corrugated steel web PC girder according to the present invention, at the stage where concrete is placed, each corrugated steel sheet is different from the adjacent floor slab concrete by the difference between the gap dimension and the partition wall thickness dimension. It will be arrange | positioned in the state withdrawn rather than each end surface. Therefore, when the cast concrete is hardened and shrunk, the difference in the longitudinal direction of the slab concrete is offset by the difference, and the floor slab of each PC girder segment manufactured without requiring special joint treatment or the like. The end surfaces of the concrete can be joined with high accuracy by ordinary joining means.

以下、図面を参照して本発明の実施の形態を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図４は、本発明の波形鋼板ウエブＰＣ桁の製造方法の一実施形態を適用して製造された波形鋼板ウエブＰＣＴ桁の側面図であり、図５は、図４に示す波形鋼板ウエブＰＣＴ桁の断面図であり、図６は、図５に示す波形鋼板ウエブＰＣＴ桁の上床版コンクリート側から波形鋼板を透視した透視図である。   FIG. 4 is a side view of a corrugated steel web PCT girder manufactured by applying one embodiment of a method for producing a corrugated steel web PC girder according to the present invention, and FIG. 5 is a corrugated steel web PCT girder shown in FIG. FIG. 6 is a perspective view of the corrugated steel sheet seen through from the upper floor slab concrete side of the corrugated steel web PCT girders shown in FIG.

以下、図４〜図６に示す、波形鋼板１０をウエブに用いた、本発明の波形鋼板ウエブＰＣ桁の実施例である波形鋼板ウエブＰＣＴ桁１を製造する工程を説明する。ここでは、波形鋼板ウエブＰＣＴ桁１における、波形鋼板１０と上下床版コンクリート２１，２２との接合方式として、波形鋼板１０の上下端を上床版コンクリート２１および下床版コンクリート２２中に埋設することによって波形鋼板１０と上下床版コンクリート２１，２２とを接合する埋め込み接合方式を適用した例で説明する。尚、波形鋼板１０と上下床版コンクリート２１，２２との接合方式としては、例えば、スタッドジベルが溶植されたフランジプレートを介して波形鋼板と上下床版コンクリートとを接合するスタッド接合方式又はその他のジベル形式を適用してもよい。   Hereinafter, a process of manufacturing the corrugated steel web PCT girders 1 which are examples of the corrugated steel web PC girders of the present invention using the corrugated steel plates 10 shown in FIGS. 4 to 6 will be described. Here, as the method of joining the corrugated steel sheet 10 and the upper and lower floor slab concrete 21, 22 in the corrugated steel sheet web PCT girder 1, the upper and lower ends of the corrugated steel sheet 10 are embedded in the upper floor slab concrete 21 and the lower floor slab concrete 22. An example in which an embedded joining method for joining the corrugated steel sheet 10 and the upper and lower floor slab concrete 21 and 22 is applied will be described. In addition, as a joining system of the corrugated steel plate 10 and the upper and lower floor slab concrete 21 and 22, for example, a stud joining system for joining the corrugated steel sheet and the upper and lower floor slab concrete via a flange plate in which a stud diver is fused, or the like. The Giberl format may be applied.

次に、本発明の工程について説明する。   Next, the process of the present invention will be described.

図７は、実施例の波形鋼板配設工程を示す側面図である。   FIG. 7 is a side view showing the corrugated steel sheet disposing process of the embodiment.

まず、図７に示すように、桁長手方向に隣接するセグメントの波形鋼板１１，１２同士を隙間１３を介して突合せて配設する（波形鋼板配設工程）。   First, as shown in FIG. 7, the corrugated steel plates 11 and 12 of the segments adjacent to each other in the longitudinal direction of the girders are arranged to face each other through the gap 13 (corrugated steel plate arranging step).

図７には、図４〜図６に示す波形鋼板ウエブＰＣＴ桁１に用いられる波形鋼板１０の隣接する桁の波形鋼板１１，１２の接合端部近傍の部分が示されている。図７に示すように、桁長手方向に隣接するセグメントの波形鋼板１１，１２を、接合端部に隙間１３をあけて配設する。各波形鋼板１１，１２の突合される接合端部の近傍には、後述する仮添接板や本添接板を取付けるための孔１１ａ，１２ａが設けられている。   FIG. 7 shows a portion in the vicinity of the joining end portion of the corrugated steel plates 11 and 12 of the adjacent corrugated steel plates 10 used in the corrugated steel web PCT girders 1 shown in FIGS. As shown in FIG. 7, the corrugated steel plates 11 and 12 of the segment adjacent to the longitudinal direction of the girder are disposed with a gap 13 at the joint end. Holes 11a and 12a for attaching temporary attachment plates and permanent attachment plates, which will be described later, are provided in the vicinity of the joining end portions where the corrugated steel plates 11 and 12 are abutted.

次に、図８に示す波形鋼板結合工程に入る。図８は、実施例の波形鋼板結合工程を示す側面図である。   Next, the corrugated steel sheet joining step shown in FIG. 8 is entered. FIG. 8 is a side view showing the corrugated steel sheet joining step of the example.

図８に示すように、波形鋼板配設工程で隙間１３を介して突合せて配設された波形鋼板１１，１２同士を、仮添接板３０で結合する（波形鋼板結合工程）。   As shown in FIG. 8, the corrugated steel plates 11, 12 arranged to face each other through the gap 13 in the corrugated steel plate arranging step are joined by a temporary attachment plate 30 (corrugated steel plate joining step).

各波形鋼板１１，１２に設けられた孔１１ａ，１２ａ（図７参照）に仮添接板３０をボルト４１で固定することによって、隙間１３を介して突合された波形鋼板１１，１２同士を結合する。   The corrugated steel plates 11, 12 that are abutted through the gap 13 are joined by fixing the temporary attachment plate 30 with bolts 41 in holes 11 a, 12 a (see FIG. 7) provided in the corrugated steel plates 11, 12. To do.

次に、図１〜図３に示す型枠取付工程に入る。図１は、実施例の型枠取付工程を示す側面図であり、図２は、図１のＡ−Ａ矢視図であり、図３は、図１のＢ−Ｂ矢視図である。   Next, the mold attachment process shown in FIGS. FIG. 1 is a side view showing the mold attachment process of the embodiment, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. 3 is a view taken along the line BB in FIG.

図１〜図３に示すように、波形鋼板結合工程で結合された波形鋼板の周囲に型枠６０を組立てる。型枠６０は、上床版型枠６１、下床版型枠６２、及びこれらを保持する型枠フレーム６３から成っている。隣接する上床版型枠６１ａ，６１ｂ、及び下床版型枠６２ａ，６２ｂ間に上記隙間１３より薄い仕切板５１，５２をそれぞれ挟み込む（型枠取付工程）。   As shown in FIGS. 1 to 3, a mold 60 is assembled around the corrugated steel plates joined in the corrugated steel plate joining step. The mold 60 includes an upper floor mold 61, a lower floor mold 62, and a mold frame 63 for holding them. Partition plates 51 and 52 that are thinner than the gap 13 are sandwiched between adjacent upper floor molds 61a and 61b and lower floor molds 62a and 62b (mold attachment step).

図１，図２に示すように、隙間１３を介して仮添接板３０で結合された波形鋼板１１，１２の周囲に型枠６０を組立てる。尚、本実施形態では、波形鋼板１１，１２と上下床版コンクリート２１，２２とを埋め込み接合方式で接合することから、波形鋼板１１，１２それぞれの上端部１１ｂ，１２ｂ及び下端部１１ｃ，１２ｃが、型枠６０のコンクリートが打設される部分に配置される。   As shown in FIGS. 1 and 2, a mold 60 is assembled around the corrugated steel plates 11 and 12 joined together by the temporary attachment plate 30 through the gap 13. In addition, in this embodiment, since the corrugated steel plates 11 and 12 and the upper and lower floor slab concrete 21 and 22 are joined by an embedded joining method, the upper end portions 11b and 12b and the lower end portions 11c and 12c of the corrugated steel plates 11 and 12 are respectively provided. The concrete of the formwork 60 is disposed in the portion where the concrete is placed.

また、図１，図３に示すように、隣接する上床版型枠６１ａ，６１ｂ、及び下床版型枠６２ａ，６２ｂ間に、上記隙間１３の寸法よりも薄い仕切板５１，５２を挟み込む。尚、仕切板５１，５２を挟み込むに当たっては、仕切板５１，５２の厚さ方向の中央と隙間１３の中央とが一致するように挟み込む。また、隙間１３の寸法と仕切板５１，５２の厚さ寸法との差は、上下床版コンクリート２１，２２の桁長手方向収縮量と等しいか又はこれより僅か大きい値に定める。こうすることにより、製造された各ＰＣＴ桁セグメントの上下床版コンクリート２１，２２長手方向長さが収縮したとき、収縮しない波形鋼板の突合端部が、コンクリート端面より突出して上下床版端面の接合に困難性が生ずる問題が解消される。従って、コンクリート端面同士、および波形鋼板１１，１２同士を、精度良く接合することができる。   As shown in FIGS. 1 and 3, partition plates 51 and 52 thinner than the size of the gap 13 are sandwiched between adjacent upper floor molds 61 a and 61 b and lower floor molds 62 a and 62 b. In addition, when inserting the partition plates 51 and 52, it inserts so that the center of the thickness direction of the partition plates 51 and 52 and the center of the clearance gap 13 may correspond. Further, the difference between the dimension of the gap 13 and the thickness dimension of the partition plates 51 and 52 is set to a value equal to or slightly larger than the amount of shrinkage in the longitudinal direction of the upper and lower floor slab concrete 21 and 22. By doing so, when the longitudinal lengths of the upper and lower floor slab concrete 21 and 22 of each manufactured PCT girder segment contract, the butt end portion of the corrugated steel sheet which does not contract protrudes from the concrete end surface and joins the upper and lower floor slab end surfaces. This eliminates the problem of difficulty. Therefore, the concrete end surfaces and the corrugated steel plates 11 and 12 can be joined with high accuracy.

次に、図９に示すコンクリート打設工程に入る。図９は、実施例のコンクリート打設工程を示す側面図である。   Next, the concrete placement process shown in FIG. 9 is entered. FIG. 9 is a side view showing the concrete placing process of the embodiment.

図９に示すように、型枠取付工程で組立てられた型枠６０にコンクリートを打設して養生し、型枠６０を脱枠する（コンクリート打設工程）。   As shown in FIG. 9, concrete is cast and cured on the mold 60 assembled in the mold mounting process, and the mold 60 is removed (concrete casting process).

上下床版コンクリート２１，２２を打設して養生し、型枠６０（図１〜図３参照）を脱枠する。波形鋼板１１，１２それぞれの上端部１１ｂ，１２ｂ及び下端部１１ｃ，１２ｃは、上下床版コンクリート２１，２２中に埋設されて、波形鋼板１１，１２と上下床版コンクリート２１，２２とが接合される。   The upper and lower floor slab concrete 21 and 22 are cast and cured, and the frame 60 (see FIGS. 1 to 3) is removed. The upper end portions 11b and 12b and the lower end portions 11c and 12c of the corrugated steel plates 11 and 12 are embedded in the upper and lower floor slab concrete 21 and 22, and the corrugated steel plates 11 and 12 and the upper and lower floor slab concrete 21 and 22 are joined. The

本発明では、隣接する上床版型枠６１ａ，６１ｂ、及び下床版型枠６２ａ，６２ｂ間に、仮添接板３０で結合された波形鋼板１１，１２間の隙間１３より薄い厚さの仕切板５１，５２を挟んでコンクリート２１，２２を打設する。   In the present invention, a partition having a thickness smaller than the gap 13 between the corrugated steel plates 11 and 12 joined by the temporary attachment plate 30 between the adjacent upper floor molds 61a and 61b and the lower floor molds 62a and 62b. Concretes 21 and 22 are placed across the plates 51 and 52.

隙間１３と仕切板５１，５２の厚さの具体的な寸法は、コンクリートの収縮代と関連している。コンクリートの収縮量は、コンクリートの構成材料、配合、コンクリートの大きさ、打設条件、養生条件その他に応じて求めることができる。例えば、本発明の一実施例では、幅員が２ｍ、かつセグメント長が３ｍ程度の高強度ＰＣＴ桁セグメントでは、隙間１３の寸法を１２ｍｍとし、仕切板５１，５２の厚さ寸法を９ｍｍとした。従って、隙間１３の寸法（１２ｍｍ）と仕切板５１，５２の厚さ寸法（９ｍｍ）との差分（３ｍｍ）だけ、それぞれの波形鋼板１１，１２が、隣接する上下床版コンクリートそれぞれの端面よりも引っ込んだ状態で配設されることとなる。   Specific dimensions of the thickness of the gap 13 and the partition plates 51 and 52 are related to the shrinkage allowance of the concrete. The amount of shrinkage of the concrete can be determined according to the constituent material of the concrete, the composition, the size of the concrete, the placement conditions, the curing conditions, and others. For example, in one embodiment of the present invention, in a high-strength PCT girder segment having a width of 2 m and a segment length of about 3 m, the size of the gap 13 is set to 12 mm, and the thickness of the partition plates 51 and 52 is set to 9 mm. Accordingly, the corrugated steel plates 11 and 12 are more than the end surfaces of the adjacent upper and lower floor slab concrete by the difference (3 mm) between the dimension of the gap 13 (12 mm) and the thickness dimension (9 mm) of the partition plates 51 and 52. It will be arranged in the retracted state.

次に、図１０に示すセグメント分離工程に入る。図１０は、実施例のセグメント分離工程を示す側面図である。   Next, the segment separation process shown in FIG. 10 is entered. FIG. 10 is a side view showing the segment separation process of the embodiment.

図１０に示すように、コンクリート打設工程で型枠６０が脱枠された各ＰＣＴ桁セグメントを切り離す（セグメント分離工程）。   As shown in FIG. 10, each PCT girder segment from which the formwork 60 was removed in the concrete placing process is separated (segment separation process).

波形鋼板１１，１２を結合している仮添接板３０を撤去し、各ＰＣＴ桁セグメントを水平に移動することによって切り離す。また、隣接する上下床版コンクリート２１，２２間に挟み込まれている仕切板５１，５２も撤去する。   The temporary splicing plate 30 connecting the corrugated steel plates 11 and 12 is removed, and the PCT girder segments are separated by moving horizontally. Moreover, the partition plates 51 and 52 sandwiched between the adjacent upper and lower floor slab concrete 21 and 22 are also removed.

最後に、図１１に示すセグメント連結工程に入る。図１１は、実施例のセグメント連結工程を示す側面図である。   Finally, the segment connection process shown in FIG. 11 is entered. FIG. 11 is a side view showing the segment connecting step of the embodiment.

図１１に示すように、波形鋼板配設工程〜セグメント分離工程を経て製作された各ＰＣＴ桁セグメントを現場にて連結する（セグメント連結工程）。   As shown in FIG. 11, each PCT girder segment manufactured through the corrugated steel sheet arranging step to the segment separating step is connected on site (segment connecting step).

セグメント分離工程で各ＰＣＴ桁セグメントを切り離した後、上下床版コンクリート２１，２２が完全硬化するまでの間にコンクリートが硬化収縮しても、隙間１３の寸法（１２ｍｍ）と仕切板の厚さ寸法（９ｍｍ）との差分（３ｍｍ）で、上下床版コンクリート２１，２２の桁長手方向収縮量が相殺され、波形鋼板１１，１２の接合端部同士が上下床版コンクリート２１，２２の端面より突出していないので、製造された各ＰＣＴ桁セグメントの上下床版コンクリート２１，２２の端面同士を容易に精度良く接合することができる。   After separating each PCT girder segment in the segment separation process, even if the concrete hardens and shrinks until the upper and lower floor slab concrete 21 and 22 are completely cured, the dimension of the gap 13 (12 mm) and the thickness of the partition plate The difference (3 mm) from (9 mm) cancels the longitudinal longitudinal shrinkage of the upper and lower floor slab concrete 21, 22, and the joined ends of the corrugated steel plates 11, 12 protrude from the end surfaces of the upper and lower floor slab concrete 21, 22. Therefore, the end surfaces of the upper and lower floor slab concrete 21 and 22 of each manufactured PCT girder segment can be easily joined with high accuracy.

上下床版コンクリート２１，２２それぞれの端面にエポキシ樹脂系接着剤を塗布して、上下床版コンクリート２１，２２の端面同士を接合し、上下床版コンクリート２１，２２それぞれにプレストレスを導入する。また、各波形鋼板１１，１２に設けられた孔１１ａ，１２ａに本添接板７０をボルト４２で固定することによって、波形鋼板１１，１２同士を結合する。このようにして、各ＰＣＴ桁セグメントが現場にて連結される。   An epoxy resin adhesive is applied to the respective end surfaces of the upper and lower floor slab concrete 21 and 22, the end surfaces of the upper and lower floor slab concrete 21 and 22 are joined together, and prestress is introduced into each of the upper and lower floor slab concrete 21 and 22. Further, the corrugated steel plates 11 and 12 are coupled to each other by fixing the main joining plate 70 with bolts 42 in the holes 11 a and 12 a provided in the corrugated steel plates 11 and 12. In this way, each PCT digit segment is connected in the field.

以上説明したように、本実施形態の波形鋼板ウエブＰＣ桁の製造方法によれば、波形鋼板ウエブを用いたＰＣ桁セグメントを、仕切り板方式で能率良くかつ精度良く製造することができ、波形鋼板ウエブＰＣ桁の施工の省力化や工期短縮、工期短縮による工費縮減が可能となる。   As described above, according to the method for manufacturing a corrugated steel web PC girder according to the present embodiment, a PC girder segment using the corrugated steel web can be efficiently and accurately manufactured by the partition plate method. Labor saving of construction of web PC girder, shortening of construction period, and reduction of construction cost by shortening construction period are possible.

尚、上述した実施形態では、本発明のＰＣ桁として、ウエブが単列のＰＣＴ桁の例を挙げたが、本発明はこれに限られるものではなく、ウエブが複数列のＰＣ箱桁であってもよい。   In the above-described embodiment, an example in which the web is a single row PCT digit is used as the PC digit of the present invention. However, the present invention is not limited to this, and the web is a multi-column PC box digit. May be.

また、上述した実施形態では、波形鋼板と上下床版コンクリートとの接合方式として、波形鋼板の上下端を上床版コンクリートおよび下床版コンクリート中に埋設することによって波形鋼板と上下床版コンクリートとを接合する埋め込み接合方式を適用した例を挙げたが、本発明の波形鋼板ウエブＰＣ桁の製造方法は、例えば、スタッドジベルが溶植されたフランジプレートを介して波形鋼板と上下床版コンクリートとを接合するスタッド接合方式又はその他のジベル形式のプレキャスト桁に適用してもよい。   In the above-described embodiment, the corrugated steel sheet and the upper and lower floor slab concrete are embedded by embedding the upper and lower ends of the corrugated steel sheet in the upper floor slab concrete and the lower floor slab concrete. Although the example which applied the embedding joining system which joins was given, the manufacturing method of the corrugated steel web PC girder of the present invention is, for example, corrugated steel and upper and lower floor slab concrete via a flange plate in which stud gibber is fused. The present invention may be applied to a precast girder of a stud joint system or other gibber type to be joined.

実施例の型枠取付工程を示す側面図である。It is a side view which shows the mold attachment process of an Example. 図１のＡ−Ａ矢視図である。It is an AA arrow line view of FIG. 図１のＢ−Ｂ矢視図である。It is a BB arrow line view of FIG. 本発明の波形鋼板ウエブＰＣ桁の製造方法の一実施形態を適用して製造された波形鋼板ウエブＰＣＴ桁の側面図である。1 is a side view of a corrugated steel web PCT girder manufactured by applying one embodiment of a method for manufacturing a corrugated steel web PC girder according to the present invention. 図４に示す波形鋼板ウエブＰＣＴ桁の断面図である。FIG. 5 is a cross-sectional view of the corrugated steel web PCT girders shown in FIG. 4. 図５に示す波形鋼板ウエブＰＣＴ桁の上床版コンクリート側から波形鋼板を透視した透視図である。FIG. 6 is a perspective view of the corrugated steel web PCT girders shown in FIG. 実施例の波形鋼板配設工程を示す側面図である。It is a side view which shows the corrugated steel plate arrangement | positioning process of an Example. 実施例の波形鋼板結合工程を示す側面図である。It is a side view which shows the corrugated steel plate joint process of an Example. 実施例のコンクリート打設工程を示す側面図である。It is a side view which shows the concrete placement process of an Example. 実施例のセグメント分離工程を示す側面図である。It is a side view which shows the segment separation process of an Example. 実施例のセグメント連結工程を示す側面図である。It is a side view which shows the segment connection process of an Example.

符号の説明Explanation of symbols

１ 波形鋼板ウエブＰＣＴ桁
１０，１１，１２ 波形鋼板
１１ａ，１２ａ 孔
１１ｂ，１２ｂ 上端部
１１ｃ，１２ｃ 下端部
１３ 隙間
２１，２２ 上下床版コンクリート
３０ 仮添接板
４１，４２ ボルト
５１，５２ 仕切板
６０ 型枠
６１，６１ａ，６１ｂ 上床版型枠
６２，６２ａ，６２ｂ 下床版型枠
６３ 型枠フレーム
７０ 本添接板 1 Corrugated steel web PCT girders 10, 11, 12 Corrugated steel 11a, 12a Holes 11b, 12b Upper end 11c, 12c Lower end 13 Clearance 21, 22 Upper and lower floor slab concrete 30 Temporary attachment plate 41, 42 Bolt 51, 52 Partition plate 60 Formwork 61, 61a, 61b Upper floor formwork 62, 62a, 62b Lower floor formwork 63 Formwork frame 70 Main plate

Claims (2)

波形鋼板ウエブを用いたＰＣ桁セグメントを製造するに当り、桁長手方向に隣接するセグメントの波形鋼板同士を隙間を介して突合せ、仮添接板で結合し、該波形鋼板にそれぞれ上下床版型枠を取付け、隣接する上床版型枠間および隣接する下床版型枠間に前記隙間より薄い仕切板を挟み、前記上床版型枠と仕切板で囲まれた空間および前記下床版型枠と仕切板で囲まれた空間にコンクリートを打設することを特徴とする波形鋼板ウエブＰＣ桁の製造方法。 When manufacturing PC girder segments using corrugated steel webs, corrugated steel sheets of segments adjacent in the longitudinal direction of the girder are butted together through a gap and joined with temporary adhering plates. mounting frame, see clamping a thin partition plate from the gap between the lower slab formwork adjacent and between upper adjacent deck formwork, the top floor plate mold and the partition space and the lower floor slab type enclosed by plate A method of manufacturing a corrugated steel web PC girder characterized by placing concrete in a space surrounded by a frame and a partition plate . 前記隙間寸法と前記仕切板の厚さ寸法との差が床版コンクリートの桁長手方向収縮量と等しいか又はこれより僅か大きいことを特徴とする請求項１記載の波形鋼板ウエブＰＣ桁の製造方法。   The method of manufacturing a corrugated steel web PC girder according to claim 1, wherein the difference between the gap dimension and the thickness dimension of the partition plate is equal to or slightly larger than the longitudinal contraction amount of the slab concrete. .
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WO2018145624A1 (en) * 2017-02-07 2018-08-16 中铁十九局集团有限公司 Flexible-pier horizontal separation seam construction method and construction apparatus therefor

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CN103924505A (en) * 2014-05-07 2014-07-16 河南省交通规划勘察设计院有限责任公司 Prefabricated steel-concrete combination T beam with corrugated steel web and construction method
WO2018145624A1 (en) * 2017-02-07 2018-08-16 中铁十九局集团有限公司 Flexible-pier horizontal separation seam construction method and construction apparatus therefor

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