JP3790531B2 - Segment production method - Google Patents

Segment production method Download PDF

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JP3790531B2
JP3790531B2 JP2004000867A JP2004000867A JP3790531B2 JP 3790531 B2 JP3790531 B2 JP 3790531B2 JP 2004000867 A JP2004000867 A JP 2004000867A JP 2004000867 A JP2004000867 A JP 2004000867A JP 3790531 B2 JP3790531 B2 JP 3790531B2
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segment
strength
cement
face member
face
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JP2005194743A (en
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西田与志雄
田中良弘
高島良
加納宏一
趙唯堅
福嶋研一
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Taisei Corp
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Description

本発明は、セグメントの製作方法に関するものである。
The present invention relates to a method of manufacturing segment.

シールド工法は、都市部において地上交通や既設建物への影響を最小限にしてトンネルを構築できる施工方法であり、近年、その需要は益々拡大している。特に、「大深度地下の公共的使用に関する特別措置法(大深度法)」の制定以降、大口径且つ大深度のシールドトンネルの建設市場での更なる拡大が予想される。   The shield method is a construction method in which a tunnel can be constructed while minimizing the influence on ground traffic and existing buildings in urban areas. In recent years, the demand has been increasing. In particular, since the enactment of the Law on Special Measures for Public Use Under Deep Depth (Deep Depth Law), further expansion in the construction market of large-diameter and deep shield tunnels is expected.

大深度における大口径シールドセグメントの設計条件の特徴を以下に示す。
(1)セグメントの横断面方向(トンネル軸に垂直に切断した断面)においては、圧縮力と曲げモーメントが断面力として作用するが、深度が深くなるにしたがって圧縮力が卓越してくる。
(2)セグメントに作用する圧縮力が卓越してくると、セグメント継手面に存在する止水シール溝による断面欠損がセグメント構造へ与える影響を無視できない状況となってくる。特に大深度となると止水シール溝の幅は広くなり、断面欠損面積が広くなってセグメントの局部的な強度不足を招来する。
(3)大深度トンネルにおいてはセグメントも大型化してくる。セグメントが大型化するとその運搬時や組立て時にセグメント隅角部が欠損しやすく、隅角部に配筋がなされていない場合は欠損の可能性がより高くなる。
The characteristics of the design conditions for large-diameter shield segments at large depths are shown below.
(1) In the cross-sectional direction of the segment (cross section cut perpendicular to the tunnel axis), the compressive force and the bending moment act as the cross-sectional force, but the compressive force becomes prominent as the depth increases.
(2) When the compressive force acting on the segment becomes prominent, the influence of the cross-sectional defect due to the water seal groove present on the segment joint surface on the segment structure cannot be ignored. In particular, when the depth is large, the width of the water-stop seal groove is widened, the cross-sectional defect area is widened, and the local strength of the segment is insufficient.
(3) Segments will be larger in deep tunnels. When the segment is enlarged, the corner portion of the segment is likely to be lost during transportation or assembly, and the possibility of loss is increased when the corner portion is not arranged.

ところで、従来の鉄筋コンクリート製セグメントは、圧縮強度がせいぜい50N/mm程度のコンクリートを用いて、セグメントの厚さがシールドトンネル外径の4〜6%程度の形状のものを製作していた。大深度且つ大口径のシールドトンネルにおいては後述する諸問題が生じ得るため、部材厚を薄くする必要がある。部材厚を薄くするためには従来の圧縮強度50N/mm程度のコンクリートではなく、圧縮強度100N/mm程度の高強度コンクリートを用いる必要性が生じてくる。高強度コンクリートを使用してセグメントを製作する場合、従来に比べてセメント量を増大するだけでは足りず、高流動性を備えたコンクリートとなるような配合とする必要がある。すなわち、水セメント比を低くして、高性能減水材を添加し、スランプフローで50cm以上の流動性を確保するのが好ましい。
By the way, as for the conventional reinforced concrete segment, the segment having a thickness of about 4 to 6% of the outer diameter of the shield tunnel is manufactured using concrete having a compressive strength of about 50 N / mm 2 at most. In a shield tunnel having a large depth and a large diameter, problems described later may occur, and thus it is necessary to reduce the member thickness. In order to reduce the thickness of the member, it is necessary to use high-strength concrete having a compressive strength of about 100 N / mm 2 instead of the conventional concrete having a compressive strength of about 50 N / mm 2 . When producing a segment using high-strength concrete, it is not necessary to increase the amount of cement as compared with the conventional case, and it is necessary to mix it with concrete having high fluidity. That is, it is preferable to lower the water-cement ratio, add a high-performance water reducing material, and ensure fluidity of 50 cm or more by slump flow.

前記した従来のセグメントにあっては、次のような問題点がある。
<1>シールドトンネルが大口径で且つ大深度に設置される場合、セグメント厚が厚くなり、セグメントの自重が増大する。セグメントの自重が増大すると、横断面方向でセグメント自重による曲げモーメントが大きくなり、更に大きな曲げ剛性を必要としてセグメントの部材厚さを大きくする必要が生じ得る。
<2>セグメントの自重が増大すると、セグメント組み立て時のハンドリングが悪くなり、組み立て作業に要する施工時間が長期化する。
<3>セグメントの自重が増大するとセグメントの運搬重量が増加し、一回の運搬数量の減少に伴ってコストアップとなり得る。
<4>セグメントの部材厚さが大きくなると、セグメントの部材厚さ分だけシールド掘進機の直径を大きくする必要があり、シールド掘進機の製作コストが増加する。
<5>セグメントの部材厚さが大きくなると、セグメントの部材厚さ分だけ掘削断面を大きくする必要があり、掘削土量の増大に伴って処分すべき一般土砂と産業廃棄物として処理する処理土量が増加することで費用が増大する。
<6>鋳鉄セグメントや鋼材とコンクリートの複合構造のセグメントを使用する場合には、防錆施工をおこなう必要がある。また、地下水による漏水を防ぐには製作精度を上げる必要がありコストアップとなる。さらに、防錆維持には高い維持費用が必要となるなど、コンクリート製セグメントに比して問題点が多い。
<7>高強度コンクリートを使用してセグメントの部材厚が薄くなっても、止水用のシール溝が狭くなるわけではない。したがって、セグメントのリング継手面に存在するシール溝による断面欠損が比較的大きなものとなり得る。
The conventional segment described above has the following problems.
<1> When the shield tunnel has a large diameter and is installed at a large depth, the segment thickness increases, and the weight of the segment increases. When the segment's own weight increases, the bending moment due to the segment's own weight increases in the cross-sectional direction, and it may be necessary to increase the segment thickness by requiring a larger bending rigidity.
<2> When the segment's own weight increases, handling at the time of assembling the segment becomes worse, and the construction time required for the assembling work is prolonged.
<3> When the segment's own weight increases, the transported weight of the segment increases, and the cost may increase as the transported quantity decreases once.
<4> When the segment member thickness increases, it is necessary to increase the diameter of the shield machine by the segment member thickness, which increases the manufacturing cost of the shield machine.
<5> When the segment member thickness increases, it is necessary to increase the excavation cross section by the segment member thickness, and the treated soil treated as general earth and industrial waste to be disposed as the amount of excavated soil increases. The cost increases as the amount increases.
<6> When using a cast iron segment or a segment of a composite structure of steel and concrete, it is necessary to carry out rust prevention construction. In addition, in order to prevent water leakage due to groundwater, it is necessary to increase the manufacturing accuracy, which increases costs. Furthermore, there are many problems compared to concrete segments, such as high maintenance costs required to maintain rust prevention.
<7> Even when the high-strength concrete is used and the segment member thickness is reduced, the sealing groove for water stop is not narrowed. Therefore, the cross-sectional defect | deletion by the seal groove which exists in the ring joint surface of a segment can become a comparatively big thing.

上記のような問題を解決するために、本発明のセグメントは、鉄筋コンクリートを基材とするトンネルライナー用セグメントであって、前記セグメントは、所要の曲率を備えた矩形の版であって高強度のセメント系材料から製作された一般部と、セグメント間継手部を構成する該一般部の端面に設けて繊維補強セメント系混合材料によって製作された端面部材とからなり、一端又は両端の該端面部材表面にはその延伸方向にシール溝を刻設してなるセグメントである。   In order to solve the above problems, a segment of the present invention is a segment for a tunnel liner based on reinforced concrete, and the segment is a rectangular plate having a required curvature and has a high strength. It consists of a general part manufactured from a cement-based material and an end surface member manufactured by a fiber-reinforced cement-based mixed material provided on the end surface of the general part constituting the joint portion between segments, and the end surface member surface at one or both ends Is a segment formed by engraving a seal groove in the extending direction.

また、前記端面部材と前記一般部を跨ぐように該端面部材表面と該一般部表面に防水塗装処理を施したセグメントを製作することもできる。   Moreover, the segment which gave the end surface member surface and this general part surface the waterproof coating process so that the said end surface member and the said general part may be straddled can also be manufactured.

さらに、本発明のセグメントの製作方法は所要の曲率を備えた矩形の版であって高強度のセメント系材料から製作された一般部と、セグメント間継手部を構成する該一般部の端面に設けられ、製作された端面部材とからなり、一端又は両端の該端面部材表面にはその延伸方向にシール溝を刻設してなる鉄筋コンクリートを基材とするトンネルライナー用セグメントの製作方法であって、高強度セメント系マトリックスに、直径が0.1〜0.3mmで、長さが8〜16mmの超高強度の鋼繊維を混入した繊維補強セメント系混合材料によって前記端面部材を製作し、予め製作された前記端面部材を、型枠側面板材に兼用させて型枠を組み立て、鉄筋を型枠内に設置し、型枠内に高強度で高流動の高強度コンクリートを打設して前記一般部を端面部材に一体成形することを特徴とする、セグメントの製作方法である。
Furthermore, the segment manufacturing method of the present invention is a rectangular plate having a required curvature, and is provided on a general part manufactured from a high-strength cementitious material and an end face of the general part constituting the inter-segment joint part. A method for producing a segment for a tunnel liner using a reinforced concrete as a base material formed by engraving a seal groove in the extending direction on one or both ends of the end face member surface . The end face member is manufactured in advance using a fiber-reinforced cement-based mixed material in which ultra-high-strength steel fibers having a diameter of 0.1 to 0.3 mm and a length of 8 to 16 mm are mixed in a high-strength cement-based matrix. the edge members that are, assembled mold side plate by combined formwork, reinforcement set up in the mold frame, said general portion by Da設high strength concrete high flowing high strength in the mold The end Characterized by integrally molding member, a manufacturing method of the segment.

本発明のセグメントの製作方法は、上記した課題を解決するための手段により、次のような効果の少なくとも一つを得ることができる。
<1>セグメント間継手部は超高強度の繊維補強セメント系混合材料により製作した端面部材にて構成されるため、該継手面に設けたシール溝に断面欠損が生じた場合でも、構造上の弱部となることはない。
<2>セグメントの隅角部は超高強度の繊維補強セメント系混合材料にて製作された端面部材で補強されているため、セグメントの運搬時や組立て時において隅角部が欠損する可能性は極めて低くなる。
<3>セグメントの部材厚さを薄くできるため、掘削土量を減らして産業廃棄物処理量を低減できる。また、大深度で大口径のシールドトンネルの施工においてもシールド掘進機の直径を小さくできるため、シールド掘進機の製作コストを低減することが可能となる。
<4>大深度で大口径のシールドトンネルの施工において、セグメントの部材厚さを薄くできるため、セグメント自重の軽量化につながり、セグメント組み立てのためのエレクター設備を小規模化できる。また、セグメント自重の軽量化によってセグメントの組み立て時間の短縮化、運搬の効率化につながる。
Segment fabrication process of the present invention, by means for solving the problems described above, it is possible to obtain at least one of the following effects.
<1> Since the joint part between segments is composed of an end face member made of an ultra-high-strength fiber reinforced cementitious mixed material, even if a cross-sectional defect occurs in the seal groove provided on the joint face, There is no weak part.
<2> Since the corner of the segment is reinforced with end face members made of ultra-high strength fiber reinforced cementitious mixed material, there is a possibility that the corner may be lost during transportation or assembly of the segment. Extremely low.
<3> Since the thickness of the segment can be reduced, the amount of excavated soil can be reduced and the amount of industrial waste treated can be reduced. Moreover, since the diameter of the shield machine can be reduced even in the construction of a shield tunnel having a large depth and a large diameter, the production cost of the shield machine can be reduced.
<4> In the construction of a shield tunnel having a large depth and a large diameter, the thickness of the segment can be reduced, leading to a reduction in the weight of the segment, and the size of the erector equipment for assembling the segment can be reduced. In addition, reducing the weight of the segment will lead to shorter segment assembly time and more efficient transportation.

<1>セグメント
本発明のセグメント1は、鉄筋コンクリートを基材とするトンネルライナー用のセグメントである。セグメント1は施工するトンネル内径と分割数に応じて所要の曲率を備えた矩形の版として成形される。
セグメント1は図1に示すように、一般部2と端面部材3とから構成できる。一般部2は、上記するように所要の曲率を備えた矩形の版であり、本発明においては、高強度で高流動のセメント系材料41から製作するのがよい。一方、後述する端面部材3は、セグメント間継手部となる端部に設けるセグメント1の構成部材である。端面部材3は、超高強度の繊維補強セメント系混合材料によって製作するのがよい。
<1> Segment The segment 1 of the present invention is a segment for a tunnel liner that uses reinforced concrete as a base material. The segment 1 is formed as a rectangular plate having a required curvature according to the inner diameter of the tunnel to be constructed and the number of divisions.
As shown in FIG. 1, the segment 1 can be composed of a general part 2 and an end face member 3. The general part 2 is a rectangular plate having a required curvature as described above. In the present invention, the general part 2 is preferably manufactured from a cement material 41 having high strength and high flow. On the other hand, the end face member 3 to be described later is a constituent member of the segment 1 provided at an end portion which becomes an inter-segment joint portion. The end face member 3 is preferably made of an ultrahigh strength fiber reinforced cementitious mixed material.

本発明においては、大深度で大口径のシールドトンネルの構築に際し、部材厚さを従来のセグメントよりも50〜70%程度に薄くしたセグメント1を提供することを目的としている。そのために、高強度で高流動のセメント系材料41を使用してセグメント1の一般部2を製作する。すなわち、従来使用していたセメント系材料よりも高性能の材料を使用することでセグメント外形をスリム化するものである。ここで、高強度とは、従来の鉄筋コンクリート製セグメントに使用するセメント系材料の圧縮強度が50N/mm程度に対して、圧縮強度が100N/mm程度の材料特性をいう。トンネルの横断面方向及びトンネル軸方向に卓越する圧縮応力に対して、圧縮強度の高いセメント系材料41を使用することによって、セグメント1の部材厚さを薄くすることが可能となる。
また、高流動とは、流動性が高く自己充填性があって、一般に振動機等による締固めを不要とする材料特性をいう。
An object of the present invention is to provide a segment 1 having a member thickness that is 50 to 70% thinner than a conventional segment when constructing a shield tunnel having a large depth and a large diameter. For this purpose, the general part 2 of the segment 1 is manufactured using a cement material 41 having high strength and high flow. That is, the segment outer shape is slimmed by using a material having a higher performance than a cement-based material that has been conventionally used. Here, the high strength, the compression strength of 50 N / mm 2 approximately of the cement-based material for use in conventional reinforced concrete segments, compressive strength refers to 100 N / mm 2 of about material properties. By using the cement-based material 41 having a high compressive strength against compressive stress that is dominant in the transverse direction of the tunnel and in the tunnel axis direction, the member thickness of the segment 1 can be reduced.
High fluidity is a material property that has high fluidity and self-filling properties, and generally does not require compaction by a vibrator or the like.

本発明のセグメント1は、特に大深度且つ大口径のシールドトンネル構築用として使用するのが好ましい。セグメント1の一般部2は高強度コンクリートにて従来に比べて薄厚とし、端部(端面部材3)は超高強度コンクリートによって構成することで、セグメント端部の破損を防止でき、形状のスリム化によって工費を低減することができる。
The segment 1 of the present invention is particularly preferably used for constructing a shield tunnel having a large depth and a large diameter. The general part 2 of the segment 1 is made of high-strength concrete, which is thinner than before, and the end part (end face member 3) is made of ultra-high-strength concrete, so that the end of the segment can be prevented from being damaged and the shape can be made slim. Therefore, the construction cost can be reduced.

<2>端面部材
端面部材3は、セグメント1の端部、特にセグメント間継手部を構成する端面に備えた細長の板状体である。端面部材3はセグメントのリング方向断面と同一の断面形状(例えば矩形断面)を備えて製作する。
端面部材3のうち、一般部2と接合する面は凹凸状に加工するのが好ましい。セグメント1製作時に一般部2と端面部材3を一体成形することとなるが、接合面を凹凸状に加工することで、かかる一般部2と端面部材3の接合部の構造特性(付着力やせん断耐力など)を高めることができる。
一方、端面部材3のうち、隣接するセグメント1と接合する面は、フラットな面に該端面部材3の延伸方向に刻設した一条のシール溝31を備えて製作される。
セグメント1,1同士が接合してできるシール溝31,31内には公知の止水シール材を設置する。
また、上記するフラット面の中央付近において該端面部材3の延伸方向に所定長さの断面半円形の溝を刻設しておくこともできる。リング方向にセグメント1を接合していく際に、接合するセグメント1,1同士の端面部材3,3の接合面に刻設した上記溝(2つの溝が合わさることで断面円形の細長溝が形成される)内に断面円形の細長の円柱棒体を備えておくことで、セグメント1,1同士を簡易かつ正確に接合施工できるとともに接合時のセグメント1の横ずれ等を防止することができる。また、公知のボルトやくさび等による継手を設けて、セグメント1,1同士を接合することもできる。
<2> End surface member The end surface member 3 is an elongate plate-like body provided on the end surface of the segment 1, particularly on the end surface constituting the joint portion between segments. The end face member 3 is manufactured to have the same cross-sectional shape (for example, a rectangular cross section) as the cross section of the segment in the ring direction.
Of the end face member 3, the surface to be joined to the general portion 2 is preferably processed into an uneven shape. When the segment 1 is manufactured, the general part 2 and the end face member 3 are integrally formed. By processing the joint surface into an uneven shape, the structural characteristics of the joint part of the general part 2 and the end face member 3 (adhesive force and shear) Proof stress).
On the other hand, the surface of the end surface member 3 that is joined to the adjacent segment 1 is manufactured by providing a single seal groove 31 that is engraved in the extending direction of the end surface member 3 on a flat surface.
A known water-stop sealing material is installed in the seal grooves 31 and 31 formed by joining the segments 1 and 1 to each other.
Also, a semicircular groove having a predetermined length can be formed in the extending direction of the end face member 3 in the vicinity of the center of the flat surface. When the segment 1 is joined in the ring direction, the groove (the two grooves are joined together to form an elongated groove with a circular cross section formed on the joining surface of the end face members 3 and 3 of the segments 1 and 1 to be joined. The segment 1 and the segment 1 can be joined together easily and accurately, and the lateral displacement of the segment 1 during joining can be prevented. In addition, a segment such as a well-known bolt or wedge can be provided to join the segments 1 and 1 together.

繊維補強セメント系混合材料としては、例えば、セメント、ポゾラン質微粉末と珪石の粉末、シリカフューム、粒径3mm以下の珪砂、高性能減水剤に水を単位水量(出来上がりコンクリート容積1m3当たり)として175〜180kg程度(水/セメントの比率が20〜22%程度)を加えた高強度セメント系マトリックスに、直径が0.1〜0.3mmで、長さが8〜16mm、引張降伏応力度が2600〜2800N/mmの超高強度の鋼繊維を容積で2%程度混入して得られる圧縮強度200〜220N/mm、曲げ強度40〜45N/mm、付着強度15〜90N/mm、透気係数2.5×10-18、吸水率0.05kg/m3、塩分拡散係数0.02×10-12/sec、弾性係数50〜55GPaの特性を備える材料を使用するのが好ましい。 Examples of the fiber-reinforced cement-based mixed material include cement, pozzolanic fine powder and silica stone powder, silica fume, silica sand having a particle size of 3 mm or less, high-performance water reducing agent, and water as a unit water volume (per 1 m 3 concrete volume). About 180 kg (water / cement ratio is about 20-22%) added to a high-strength cement matrix, the diameter is 0.1-0.3 mm, the length is 8-16 mm, and the tensile yield stress is 2600. compressive strength obtained with ultra high strength steel fibers of ~2800N / mm 2 by mixing about 2% by volume 200~220N / mm 2, bending strength 40~45N / mm 2, adhesion strength 15~90N / mm 2, permeability coefficient 2.5 × 10 -18 m 2, water absorption 0.05 kg / m 3, salinity diffusion coefficient 0.02 × 10 -12 m 2 / sec , the elastic coefficient 50~55GP Preferably used material with properties.

セグメント1の端面を超高強度コンクリートからなる端面部材3にて補強することにより、セグメント1隅角部の損傷の可能性が極めて低くなる。また、繊維補強セメント系混合材料を構成する鋼繊維(金属繊維)の引張り抵抗作用によって、端部ひび割れの発生も防止することができる。さらに、セグメント1のリング方向において、端面部材3に局部荷重が作用した場合でも、相対的に一般部2よりも極めて硬い端面部材3によって局部荷重が端面部材3と接合している一般部2の全断面にほぼ均等に荷重分散することとなる。   By reinforcing the end face of the segment 1 with the end face member 3 made of ultrahigh-strength concrete, the possibility of damage to the corner of the segment 1 becomes extremely low. Further, the occurrence of end cracking can be prevented by the tensile resistance action of the steel fibers (metal fibers) constituting the fiber-reinforced cement-based mixed material. Furthermore, even when a local load is applied to the end surface member 3 in the ring direction of the segment 1, the local load is joined to the end surface member 3 by the end surface member 3 that is relatively harder than the general portion 2. The load will be distributed almost uniformly over the entire cross section.

また、端面部材3と一般部2とを跨ぐように該端面部材3表面と該一般部2表面に防水塗装処理を施しておくのが好ましい。端面部材3と一般部2との接合部に防水処理を施しておくことで、かかる接合部が漏水の弱部となることを防止でき、またセグメント1,1の接合面は防水シール材にて防水処理がおこなわれていることからセグメントリングの全周にわたって漏水対策が施されたこととなる。
Moreover, it is preferable to perform a waterproof coating process on the surface of the end surface member 3 and the surface of the general portion 2 so as to straddle the end surface member 3 and the general portion 2. By applying waterproof treatment to the joint between the end face member 3 and the general part 2, it is possible to prevent the joint from becoming a weak part of water leakage, and the joint of the segments 1 and 1 is made of a waterproof sealing material. Since the waterproof treatment is performed, the countermeasure against water leakage is taken all around the segment ring.

図2〜4を参照して、本発明のセグメントの製作方法を説明する。   With reference to FIGS. 2-4, the manufacturing method of the segment of this invention is demonstrated.

1ピースのセグメント1を製作するための型枠5内において、予め製作された端面部材3を設置する(図2参照)。ここで、使用する型枠5は、型枠の変形が殆どなく、多数回の転用が可能な鋼製材料にて製作するのがよい。ここで、型枠5は、少なくとも、セグメント1の内周面の曲率を備えた底面板材51と、底面板材51表面上で該底面板材51に垂直に取り付けた側面板材52,52とから構成される(図3参照)。
ここで、従来は、上記構成のほかにセグメント間継手となる端部にも別途の側部板材を備えて型枠5を成形していたが、本発明のセグメント1は端面部材3をリング方向端部にその構成要素として設置するため、予め製作された端面部材3,3を底面板材51上で相対する側面板材52,52の間に設置すればよい。すなわち、上記する別途の側面板材を設けないことも可能である。
なお、底面板材51及び側面板材52には端面部材3を係止可能に夫々突起部53,54を備えておくのがよい。
A prefabricated end face member 3 is installed in a mold 5 for producing a one-piece segment 1 (see FIG. 2). Here, the formwork 5 to be used is preferably made of a steel material that is hardly deformed and can be used many times. Here, the mold 5 is composed of at least a bottom plate 51 having the curvature of the inner peripheral surface of the segment 1 and side plates 52 and 52 attached perpendicularly to the bottom plate 51 on the bottom plate 51 surface. (See FIG. 3).
Here, conventionally, in addition to the above-described configuration, the mold 5 is formed by providing a separate side plate material at the end that becomes the inter-segment joint, but the segment 1 of the present invention has the end surface member 3 in the ring direction. In order to install it as an element at the end, end surface members 3 and 3 manufactured in advance may be installed between the side plate members 52 and 52 facing each other on the bottom plate member 51. That is, it is possible not to provide the above-mentioned separate side plate.
The bottom plate 51 and the side plate 52 are preferably provided with projections 53 and 54, respectively, so that the end member 3 can be locked.

型枠5に端面部材3,3を設置後、側面板材52,52と端面部材3,3と底面板材51によって形成された箱型の内部に所要の鉄筋6を設置する。
鉄筋6を設置後、上記箱内に高強度かつ高流動なセメント系材料41を打設していく(図4参照)。
所定の養生期間経過後、型枠5を脱型してセグメント1が製作される。
After the end surface members 3 and 3 are installed on the mold 5, the required reinforcing bars 6 are installed inside the box formed by the side plate members 52 and 52, the end surface members 3 and 3, and the bottom plate member 51.
After the rebar 6 is installed, a cement material 41 having high strength and high fluidity is placed in the box (see FIG. 4).
After a predetermined curing period, the mold 5 is removed and the segment 1 is manufactured.

本発明のセグメントを示した斜視図。The perspective view which showed the segment of this invention. 本発明のセグメントの製作方法のうち、端面部材を型枠内に設置した状況を説明した縦断図。The longitudinal section explaining the situation where the end face member was installed in the formwork among the manufacturing methods of the segment of the present invention. 図2の平面図。The top view of FIG. 本発明のセグメントの製作方法のうち、型枠内にコンクリートを打設した状況を説明した縦断図。The longitudinal section explaining the situation where concrete was laid in a formwork among the manufacturing methods of the segment of the present invention.

符号の説明Explanation of symbols

1・・・・セグメント
2・・・・一般部
3・・・・端面部材
31・・・シール溝
41・・・セメント系材料
5・・・・型枠
6・・・・鉄筋
DESCRIPTION OF SYMBOLS 1 ... Segment 2 ... General part 3 ... End surface member 31 ... Seal groove 41 ... Cement-type material 5 ... Formwork 6 ... Reinforcing bar

Claims (1)

所要の曲率を備えた矩形の版であって高強度のセメント系材料から製作された一般部と、セグメント間継手部を構成する該一般部の端面に設けられ、製作された端面部材とからなり、一端又は両端の該端面部材表面にはその延伸方向にシール溝を刻設してなる鉄筋コンクリートを基材とするトンネルライナー用セグメントの製作方法であって、
高強度セメント系マトリックスに、直径が0.1〜0.3mmで、長さが8〜16mmの超高強度の鋼繊維を混入した繊維補強セメント系混合材料によって前記端面部材を製作し
予め製作された前記端面部材を、型枠側面板材に兼用させて型枠を組み立て、
鉄筋を型枠内に設置し、
型枠内に高強度で高流動の高強度コンクリートを打設して前記一般部を端面部材に一体成形することを特徴とする
セグメントの製作方法。
A rectangular plate with the required curvature and made of a high-strength cementitious material, and an end face member provided on the end face of the general part constituting the inter-segment joint. A method for producing a segment for a tunnel liner based on a reinforced concrete formed by engraving a seal groove in the extending direction on the end face member surface at one end or both ends ,
The end face member is manufactured by a fiber-reinforced cement-based mixed material in which ultrahigh-strength steel fibers having a diameter of 0.1 to 0.3 mm and a length of 8 to 16 mm are mixed in a high-strength cement-based matrix ,
The prefabricated said end surface members, assemble the mold by also used as mold side plate,
Install the rebar in the formwork,
Characterized by integrally molding a high strength concrete High flowing at high intensity edge members of said general portion by Da設the mold frame,
Segment production method.
JP2004000867A 2004-01-06 2004-01-06 Segment production method Expired - Fee Related JP3790531B2 (en)

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JP4589833B2 (en) * 2005-06-30 2010-12-01 株式会社ピーエス三菱 Segment for shield tunnel and manufacturing method thereof
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