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JP5624277B2 - Method for manufacturing inner surface covering segment for tunnel lining and formwork apparatus therefor - Google Patents
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JP5624277B2 - Method for manufacturing inner surface covering segment for tunnel lining and formwork apparatus therefor - Google Patents

Method for manufacturing inner surface covering segment for tunnel lining and formwork apparatus therefor Download PDF

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JP5624277B2
JP5624277B2 JP2009071145A JP2009071145A JP5624277B2 JP 5624277 B2 JP5624277 B2 JP 5624277B2 JP 2009071145 A JP2009071145 A JP 2009071145A JP 2009071145 A JP2009071145 A JP 2009071145A JP 5624277 B2 JP5624277 B2 JP 5624277B2
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mold
resin
gap
formwork
bottom plate
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JP2010222837A (en
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光政 岡村
光政 岡村
小林 修
修 小林
裕輝 三好
裕輝 三好
加藤周三
周三 加藤
与志雄 西田
与志雄 西田
磯 陽夫
陽夫 磯
金子 範彦
範彦 金子
光洋 八坂
光洋 八坂
関口 浩之
浩之 関口
康介 野本
康介 野本
忠男 関口
忠男 関口
圭介 岩城
圭介 岩城
信宏 本重
信宏 本重
三浦勝和
勝和 三浦
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Taisei Corp
Shonan Plastic Manufacturing Co Ltd
Nishimatsu Construction Co Ltd
Maeda Corp
Toda Corp
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Taisei Corp
Shonan Plastic Manufacturing Co Ltd
Nishimatsu Construction Co Ltd
Maeda Corp
Toda Corp
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs

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  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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Description

本発明は、内面を樹脂系シートで一体的に被覆したトンネル覆工用セグメントの製造方法及びそのための型枠装置に関する。   The present invention relates to a method for manufacturing a tunnel lining segment whose inner surface is integrally covered with a resin-based sheet, and a formwork apparatus therefor.

都市トンネルでは、所謂シールド工法によって多くのトンネルが構築されている。このシールド工法は、シールド機で掘削を行いながら、該シールド機のスキンプレート後方部内で、断面円弧状等のセグメントを周方向に組み立てるとともに、組立済みのセグメントにトンネル軸方向に接続し、順次、トンネルを構築するトンネル工法である。   In urban tunnels, many tunnels are constructed by the so-called shield method. In this shield method, while excavating with a shield machine, in the rear part of the skin plate of the shield machine, assembling segments such as a circular arc cross section in the circumferential direction, connecting to the assembled segments in the tunnel axis direction, It is a tunnel construction method to build a tunnel.

この工法によるトンネル種別の内、特に下水道トンネルの場合は、管渠内で発生する硫化水素に原因してコンクリートに腐食が発生する問題があり、この腐食に対処するためにセグメントの内面をFRP、高密度ポリエチレン、ポリプロピレン等の樹脂系材料によって被覆することが行われている。   In the tunnel type by this construction method, especially in the case of sewer tunnels, there is a problem that the concrete is corroded due to hydrogen sulfide generated in the pipe rod. In order to cope with this corrosion, the inner surface of the segment is FRP, Coating with resin-based materials such as high-density polyethylene and polypropylene has been performed.

セグメント内面を被覆する方法としては、シールドトンネル構築後に、内面に樹脂系材料を貼り付けたり、吹き付けたり、樹脂パネルをボルト等によって取り付ける方法が採用されていたが、これらの方法の場合は現場作業が多くなり、工期が長期化する、労力コストが嵩むなどの問題があった。   As a method of covering the inner surface of the segment, after the construction of the shield tunnel, a method of attaching a resin material to the inner surface, spraying it, or attaching a resin panel with bolts etc. was adopted. However, there are problems such as an increase in work period and labor cost.

そこで近年は、樹脂系材料からなるシートをセグメントの内面に予め一体化させておく内面被覆セグメントが提案されている(下記特許文献1〜3等参照)。この内面被覆セグメントは、予め、セグメント成型用型枠の底面に樹脂系シートを例えば両面テープ等で固定した後、継手や鉄筋を組み付け、コンクリートを打設する手順によって製造されるものである。   In recent years, therefore, an inner surface covering segment in which a sheet made of a resin-based material is integrated in advance with the inner surface of the segment has been proposed (see Patent Documents 1 to 3 below). This inner surface covering segment is manufactured by a procedure in which a resin-based sheet is fixed to the bottom surface of a segment molding form in advance with, for example, a double-sided tape, and then joints and reinforcing bars are assembled and concrete is placed.

特開平10−159492号公報JP-A-10-159492 特開平11−117693号公報Japanese Patent Laid-Open No. 11-117693 特開2004−11169号公報JP 2004-11169 A

しかしながら、前記樹脂系シートを両面テープ等で固定する方法の場合は、両面テープの固定作業及び剥離作業に多くの時間と手間が掛かり、作業が効率化しないなどの問題があった。また、全面接着は実質的に不可能であり、要所を両面テープで止めることになるが、ズレが生じたり、両面テープの中間で徐々に生じた歪みがある箇所でシワとなって表出することがあるなどの問題があった。   However, in the case of the method of fixing the resin-based sheet with a double-sided tape or the like, there has been a problem that the fixing and peeling work of the double-sided tape takes a lot of time and labor, and the work is not efficient. In addition, it is practically impossible to adhere to the entire surface, and the important points will be stopped with double-sided tape, but it will appear as wrinkles where there is misalignment or there is a gradual distortion in the middle of the double-sided tape. There was a problem such as that.

そこで本発明の主たる課題は、内面被覆セグメント製造に当たり、樹脂系シートの固定を省力的に行い得るようにするとともに、全面に亘って均等に保持し得るようにしたトンネル覆工用内面被覆セグメントの製造方法及びそのための型枠装置を提案することにある。   Accordingly, the main problem of the present invention is that the inner surface covering segment for tunnel lining that can be held uniformly over the entire surface while making it possible to save the resin-based sheet in labor saving when manufacturing the inner surface covering segment. It is to propose a manufacturing method and a formwork apparatus therefor.

前記課題を解決するために請求項1に係る本発明として、セグメント用型枠装置のセグメント内面に対応する型枠面に樹脂系シートを固定し、型枠内にコンクリートを打設することにより前記樹脂系シートが一体化されたトンネル覆工用内面被覆セグメントを製造する方法において、
前記セグメント用型枠装置は、円弧状型枠面を有する底版型枠と、この底版型枠の周方向端部から起立した起立型枠面を有する端面型枠と、底版型枠の側部から起立した起立型枠面を有する側面型枠とを備えており、
前記セグメント内面に対応する型枠面に多数の開孔を全面に亘って形成するとともに、前記底版型枠の面の裏側に真空度を調整可能な真空チャンバを形成し、
前記底版型枠と前記端面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、かつ前記底版型枠と前記側面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、
前記底版型枠、端面型枠及び側面型枠を組み立て、前記底版型枠と端面型枠とによる隅角部に前記間隙が形成されるとともに、前記底版型枠と側面型枠とによる隅角部に前記間隙が形成された状態としておき、前記底版型枠の円弧状型枠面の上に樹脂系シートを敷設、樹脂系シートの周縁を前記隅角部に形成された前記間隙にそれぞれ挿入することによって保持するとともに、前記真空チャンバ内を所定の負圧状態とすることにより前記樹脂系シートを吸引力によって固定した状態で型枠内にコンクリートを打設することを特徴とするトンネル覆工用内面被覆セグメントの製造方法が提供される。
In order to solve the above-mentioned problem, as the present invention according to claim 1, the resin-based sheet is fixed to the mold surface corresponding to the segment inner surface of the segment mold apparatus, and concrete is placed in the mold frame. In the method of manufacturing the inner surface covering segment for tunnel lining in which the resin sheet is integrated,
The segment mold apparatus includes a bottom plate mold frame having an arc-shaped mold surface, an end surface mold frame having an upright mold surface rising from a circumferential end of the bottom mold frame, and a side portion of the bottom mold frame. A side mold having an upright mold frame surface,
A number of openings are formed over the entire surface of the mold corresponding to the inner surface of the segment, and a vacuum chamber capable of adjusting the degree of vacuum is formed on the back side of the surface of the bottom mold,
A gap for inserting a peripheral edge of the resin-based sheet along the surface direction of the bottom-plate mold is formed in a corner portion formed by the bottom-plate mold and the end-face mold, and the gap of the resin- based sheet is formed by the gap. parts is formed periphery holding portion of the resin-based sheet for holding, and the corner portion by said side mold and said bottom plate mold, inserting a peripheral portion of the resin sheet along the surface direction of the bottom plate formwork A gap for forming the peripheral edge of the resin-based sheet that holds the edge of the resin- based sheet is formed by the gap,
Assembling the bottom plate formwork, the end face formwork and the side face formwork, the gap is formed at the corners by the bottom plate formwork and the end face formwork, and the corners by the bottom plate formwork and the side face formwork wherein leave a state in which a gap is formed in the bottom plate mold a resin sheet is laid on top of the arcuate mold surface of each of the peripheral portions of the resin sheet into the gap formed in the corner A tunnel cover characterized in that concrete is placed in a mold with the resin-based sheet fixed by a suction force by holding the inside of the vacuum chamber in a predetermined negative pressure state while being inserted. A method for manufacturing a work inner surface covering segment is provided.

上記請求項1記載の発明では、前記セグメント用型枠装置は、円弧状型枠面を有する底版型枠と、この底版型枠の周方向端部から起立した起立型枠面を有する端面型枠と、底版型枠の側部から起立した起立型枠面を有する側面型枠とを備えており、セグメント内面に対応する型枠面に多数の開孔を全面に亘って形成するとともに、前記底版型枠の面の裏側に真空度を調整可能な真空チャンバを形成し、更に前記底版型枠と前記端面型枠とによる隅角部に、前記底版型枠の面方向に沿って間隙が形成され、この間隙によって樹脂シートの縁部を挟持する樹脂系シートの周縁保持部が形成され、かつ前記底版型枠と前記側面型枠とによる隅角部に、前記底版型枠の面方向に沿って間隙が形成され、この間隙によって樹脂シートの縁部を挟持する樹脂系シートの周縁保持部が形成されており、コンクリートの打設に当たり、前記底版型枠の円弧状型枠面の上に樹脂系シートを敷設するとともに、樹脂系シートの周縁を前記隅角部に形成された間隙に挿入して保持し、前記真空チャンバ内を所定の負圧状態とすることにより前記樹脂系シートを吸引力によって固定するようにした。従って、樹脂系シートを省力的かつ確実に型枠面に対し固定できるようになる。   In the first aspect of the present invention, the segment mold apparatus is a bottom plate mold having an arcuate mold surface, and an end surface mold having an upright mold surface rising from a circumferential end of the bottom plate mold. And a side surface mold frame having an upright mold surface rising from a side portion of the bottom mold frame, and a plurality of apertures are formed over the entire surface of the mold frame surface corresponding to the segment inner surface, and the bottom plate A vacuum chamber capable of adjusting the degree of vacuum is formed on the back side of the mold surface, and a gap is formed along the surface direction of the bottom mold frame at a corner formed by the bottom mold frame and the end surface mold frame. The periphery holding portion of the resin-based sheet that sandwiches the edge portion of the resin sheet by this gap is formed, and at the corner portion by the bottom plate mold and the side surface mold, along the surface direction of the bottom plate mold A tree is formed in which a gap is formed, and the edge of the resin sheet is sandwiched by the gap. A peripheral holding portion of the system sheet is formed, and when placing concrete, a resin system sheet is laid on the arcuate mold surface of the bottom mold frame, and the periphery of the resin system sheet is formed at the corner portion. The resin sheet is fixed by a suction force by inserting and holding in the formed gap and bringing the vacuum chamber into a predetermined negative pressure state. Therefore, the resin-based sheet can be fixed to the mold surface in a labor-saving and reliable manner.

また、上記発明では、底版型枠の周縁部において、間隙によって前記樹脂系シートの周縁を保持する周縁保持部を形成しているため、樹脂系シートの端縁部のめくれや折返し等の不具合を無くして製造することが可能となる。   Moreover, in the said invention, since the periphery holding | maintenance part which hold | maintains the periphery of the said resin-type sheet | seat with a gap | interval is formed in the peripheral part of a baseplate formwork, malfunctions, such as turning over of the edge part of a resin-type sheet | seat, a folding | turning, etc. It can be manufactured without it.

請求項2に係る本発明として、上記請求項1記載のトンネル覆工用内面被覆セグメントの製造方法のための型枠装置であって、
円弧状型枠面を有する底版型枠と、この底版型枠の周方向端部から起立した起立型枠面を有する端面型枠と、底版型枠の側部から起立した起立型枠面を有する側面型枠とを備えたセグメント用型枠装置において、
前記底版型枠の円弧状型枠面に多数の開孔を全面に亘って形成するとともに、裏面側に真空チャンバを形成し、
前記底版型枠と前記端面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、かつ前記底版型枠と前記側面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、
前記真空チャンバに1又は複数のエア抜き管を連結するとともに、このエア抜き管を真空ポンプに接続し、前記エア抜き管の中間に開閉バルブを設けたことを特徴とするセグメント用型枠装置が提供される。
As the present invention according to claim 2, there is provided a formwork apparatus for a method for producing an inner surface covering segment for tunnel lining according to claim 1,
A bottom plate mold having an arcuate mold surface, an end surface mold having an upright frame surface standing from a circumferential end of the bottom plate frame, and an upright frame surface standing from a side of the bottom mold frame In the segment formwork apparatus provided with the side formwork,
A number of apertures are formed over the entire surface in the arc-shaped mold surface of the bottom plate mold, and a vacuum chamber is formed on the back side,
A gap for inserting a peripheral edge of the resin-based sheet along the surface direction of the bottom-plate mold is formed in a corner portion formed by the bottom-plate mold and the end-face mold, and the gap of the resin- based sheet is formed by the gap. parts is formed periphery holding portion of the resin-based sheet for holding, and the corner portion by said side mold and said bottom plate mold, inserting a peripheral portion of the resin sheet along the surface direction of the bottom plate formwork A gap for forming the peripheral edge of the resin-based sheet that holds the edge of the resin- based sheet is formed by the gap,
One or more air vent pipes are connected to the vacuum chamber, the air vent pipe is connected to a vacuum pump, and an open / close valve is provided in the middle of the air vent pipe. Provided.

以上詳説のとおり本発明によれば、内面被覆セグメント製造に当たり、樹脂系シートの固定を省力的に行い得るようになるとともに、全面に亘って均等に保持し得るようになる。   As described above in detail, according to the present invention, in the production of the inner surface covering segment, the resin-based sheet can be fixed labor-saving and can be held uniformly over the entire surface.

本発明に係る内面被覆セグメント用型枠装置1の平面図である。It is a top view of the formwork apparatus 1 for inner surface covering segments which concerns on this invention. 図1のII−II線矢視図である。It is the II-II arrow directional view of FIG. 図1のIII−III線矢視図である。It is the III-III arrow directional view of FIG. 側面型枠4A、4Bの正面図である。It is a front view of side formwork 4A, 4B. 内面被覆セグメントSの製造手順図(その1)である。FIG. 6 is a manufacturing procedure diagram (part 1) of the inner surface covering segment S; 内面被覆セグメントSの製造手順図(その2)である。FIG. 6 is a production procedure diagram (part 2) for the inner surface covering segment S; 内面被覆セグメントSの製造手順図(その3)である。FIG. 6 is a production procedure diagram (part 3) for the inner surface covering segment S; 内面被覆セグメントSの製造手順図(その4)である。FIG. 6 is a manufacturing procedure diagram (part 4) of the inner surface covering segment S;

以下、本発明の実施の形態について図面を参照しながら詳述する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図1〜図3に示されるように、内面被覆セグメント用型枠装置1(以下、単に型枠装置という。)は、円弧状型枠面を有する底版型枠2と、この底版型枠2の周方向端部から起立した起立型枠面を有する端面型枠3A、3Bと、底版型枠2の側部から起立した起立型枠面を有する側面型枠4A、4Bとからなり、前記底版型枠2の円弧状型枠面2Aに多数の開孔2a、2a…を形成するとともに、裏面側に真空度を調整可能な真空チャンバ5を形成し、この真空チャンバ5に1又は複数のエア抜き管6を連結するとともに、このエア抜き管6を真空ポンプ7に接続し、前記エア抜き管6の中間に開閉バルブ8を設けたものである。なお、高流動コンクリートを使用する場合は、蓋型枠が追加される。   As shown in FIG. 1 to FIG. 3, an inner surface covering segment mold apparatus 1 (hereinafter simply referred to as a mold apparatus) includes a bottom plate mold 2 having an arcuate mold surface, and the bottom plate mold 2. The bottom plate mold comprises end surface molds 3A and 3B having upright mold surfaces rising from the circumferential ends, and side molds 4A and 4B having upright frame surfaces rising from the side of the bottom plate mold 2. A large number of apertures 2a, 2a,... Are formed in the arcuate mold surface 2A of the frame 2, and a vacuum chamber 5 capable of adjusting the degree of vacuum is formed on the back side, and one or a plurality of air vents are formed in the vacuum chamber 5. The pipe 6 is connected, the air vent pipe 6 is connected to a vacuum pump 7, and an open / close valve 8 is provided in the middle of the air vent pipe 6. In addition, when using high fluidity concrete, a lid formwork is added.

以下、前記型枠装置1について更に詳しく詳述する。   Hereinafter, the mold apparatus 1 will be described in more detail.

前記底版型枠2は、セグメント内面に対応する円弧状型枠面2Aを有し、この円弧状型枠面2Aに多数の開孔2a、2a…が形成されている。この開孔2aは、円弧状型枠面2Aの全面に亘って形成してある。前記円弧状型枠面2Aの裏面から所定距離だけ離間した位置に前記円弧状面に沿うように配置された曲面封鎖板9と、端部封鎖板10A、10Bと、側面型枠4A、4Bとによって周囲が閉塞された真空チャンバ5が形成されている。   The bottom plate mold 2 has an arc-shaped mold surface 2A corresponding to the inner surface of the segment, and a plurality of holes 2a, 2a,... Are formed in the arc-shaped mold surface 2A. The opening 2a is formed over the entire surface of the arcuate mold surface 2A. A curved sealing plate 9 arranged along the arcuate surface at a position spaced apart from the back surface of the arcuate mold surface 2A by a predetermined distance, end sealing plates 10A and 10B, and side molds 4A and 4B; Thus, a vacuum chamber 5 whose periphery is closed is formed.

前記端面型枠3A、3Bは、セグメントの周方向端面に対応する起立型枠面11a、12aを有するボックス状の型枠部材11,12が使用されている。この型枠部材11,12には手動パンタジャッキ13が連結されており、このジャッキ13の手動操作によって前記型枠部材11,12が脱型時に離反方向に移動可能となっている。前記底版型枠2と型枠部材11,12とによる隅角部には、前記底版型枠2の面方向に沿って間隙14が形成されており、この間隙14によって樹脂系シートの縁部を挟持できるようになっている。前記間隙14が本発明の「樹脂系シートの周縁保持部」を構成するものである。   As the end surface molds 3A and 3B, box-shaped mold members 11 and 12 having upright frame surfaces 11a and 12a corresponding to the circumferential end surfaces of the segments are used. A manual panter jack 13 is connected to the mold members 11 and 12, and the mold members 11 and 12 can be moved away from each other when the jack 13 is manually operated. A gap 14 is formed along the surface direction of the bottom stencil mold 2 at the corners formed by the bottom stencil mold 2 and the mold members 11 and 12, and the edge of the resin-based sheet is formed by the gap 14. It can be pinched. The gap 14 constitutes the “periphery holding portion of the resin-based sheet” of the present invention.

前記側面型枠4A、4Bは、図4に示されるように、セグメントの側面に対応する起立型枠面15a、16aを有する円弧板状の型枠15、16が使用されている。この円弧板状型枠15、16の内周側は、前記真空チャンバ5の側面閉塞板部15b、16bを兼用しており、この側面閉塞板部15b、16bに真空チャンバ5に連通するエア抜き管6の接続管6a、6bが接続されている。円弧板状型枠15、16には、2本のアーム部材17,18が設けられており、図3に示されるように、このアーム部材17,18の下端が型枠ベース19に対して軸支されることにより、前記円弧板状型枠15、16が脱型時に離反方向に揺動するようになっている。前記底版型枠2と円弧板状型枠15、16とによる隅角部には、前記底版型枠2の面方向に沿って間隙20が形成されており、この間隙20によって樹脂系シートの縁部を挟持できるようになっている。前記間隙20も本発明の「樹脂系シートの周縁保持部」を構成するものである。   As shown in FIG. 4, the side surface molds 4 </ b> A and 4 </ b> B use arcuate plate-shaped molds 15 and 16 having upright mold surface surfaces 15 a and 16 a corresponding to the side surfaces of the segments. The arcuate plate-shaped molds 15, 16 have an inner peripheral side that also serves as side-surface closing plate portions 15 b, 16 b of the vacuum chamber 5, and an air vent that communicates with the side-surface closing plate portions 15 b, 16 b to the vacuum chamber 5. Connection pipes 6a and 6b of the pipe 6 are connected. The arc plate-shaped molds 15 and 16 are provided with two arm members 17 and 18, and the lower ends of the arm members 17 and 18 are pivoted with respect to the mold base 19 as shown in FIG. 3. By being supported, the arcuate plate-shaped molds 15 and 16 swing in the separating direction when removed. A gap 20 is formed along the surface direction of the bottom stencil mold 2 at the corners formed by the bottom stencil 2 and the arc plate molds 15, 16. The part can be clamped. The gap 20 also constitutes the “periphery holding portion of the resin-based sheet” of the present invention.

〔内面被覆セグメントの製造手順〕
次に、前記型枠装置1を用いた内面被覆セグメントの製造手順について、図5〜図8に基づいて詳述する。
[Procedure for manufacturing inner surface coating segment]
Next, the manufacturing procedure of the inner surface covering segment using the mold apparatus 1 will be described in detail with reference to FIGS.

図5に示されるように、底版型枠2の円弧状型枠面の上に樹脂系シート21を敷設する。この際、樹脂系シート21の周縁は前記底版型枠2と型枠部材11,12との隅角部に形成された間隙14、前記底版型枠2と円弧板状型枠15、16との隅角部に形成された間隙20にそれぞれ挿入し保持するようにする。   As shown in FIG. 5, a resin sheet 21 is laid on the arcuate mold surface of the bottom mold 2. At this time, the periphery of the resin-based sheet 21 is a gap 14 formed in a corner portion between the bottom plate mold 2 and the mold members 11 and 12, and the bottom plate mold 2 and the arc plate-shaped molds 15 and 16. Each is inserted and held in the gap 20 formed at the corner.

前記樹脂系シート21としては、高密度ポリエチレン、ポリプロピレン等の樹脂層と、コンクリートへの定着層とからなる2層構造のものが好適に使用される。前記樹脂系シート21の品質は、日本下水道事業団「下水道コンクリート構造物の腐食抑制技術及び防食技術マニュアル」のシートライニング工法の品質規格「D種」に定める品質を満足するものとする。具体的には下記(1)〜(5)の条件を満足する樹脂系シートとする。
(1)被覆(シート)の外観にしわ、むら、はがれ、われがない。
(2)シートとコンクリートとの固着性は、0.24N/mm以上である。
(3)10%硫酸水溶液、水酸化カルシウム飽和水溶液にそれぞれ60日間浸せきしても被覆にふくれ、われ、軟化、溶出がない。
(4)10%硫酸水溶液に120日間浸せきした時の硫黄侵入深さが1%以下である。
(5)0.29Mpaの水圧を1時間かけても透水量は0.15g以下である。
As the resin-based sheet 21, a two-layer structure composed of a resin layer such as high-density polyethylene or polypropylene and a fixing layer to concrete is preferably used. The quality of the resin-based sheet 21 satisfies the quality defined in the quality standard “D type 2 ” of the sheet lining construction method of the “Japan Sewerage Corporation Corrosion Inhibition Technology and Corrosion Prevention Technology Manual”. Specifically, the resin sheet satisfies the following conditions (1) to (5).
(1) There is no wrinkle, unevenness, peeling or cracking on the appearance of the coating (sheet).
(2) The adhesion between the sheet and concrete is 0.24 N / mm 2 or more.
(3) Even if immersed in a 10% sulfuric acid aqueous solution and a saturated calcium hydroxide aqueous solution for 60 days, there is no swelling, softening, or dissolution of the coating.
(4) The depth of sulfur penetration when immersed in a 10% sulfuric acid aqueous solution for 120 days is 1% or less.
(5) Water permeability is 0.15 g or less even when water pressure of 0.29 Mpa is applied for 1 hour.

その他には、下記(1)〜(6)の条件を満足することが望ましい。
(1)シートとコンクリート(セグメント)との固着性は、0.40N/mm以上である。
(2)摩耗試験(JIS A 5209-1994(改正))の結果、摩耗量は塩ビ管0.02gに対しシートは0.00gである。
(3)耐衝撃性試験(JIS A 6916-2000(改正))の結果、シートにひび割れおよびはがれがない。
(4)シートの粗度係数は、塩ビ管とほぼ同等の0.01以下である。
(5)セグメント取付後のシートにしわ、むら、はがれ、われがない。
(6)セグメント取付後のシートは、設計荷重の正・負曲げ試験、推力試験で剥離、破断しない。
In addition, it is desirable to satisfy the following conditions (1) to (6).
(1) The adhesiveness between the sheet and concrete (segment) is 0.40 N / mm 2 or more.
(2) As a result of the abrasion test (JIS A 5209-1994 (revision)), the abrasion amount is 0.02 g for PVC pipe and 0.00 g for the sheet.
(3) As a result of the impact resistance test (JIS A 6916-2000 (revised)), the sheet is not cracked or peeled off.
(4) The roughness coefficient of the sheet is 0.01 or less, which is almost the same as that of a PVC pipe.
(5) There is no wrinkling, unevenness, peeling or cracking on the sheet after the segment is mounted.
(6) The sheet after the segment is mounted will not peel or break in the design load positive / negative bending test or thrust test.

前記定着層の構造は特に限定されないが、例えば特開2004-11169号公報に開示された接合補助織物の如き3次元構造の定着体や、微細な突起を有する特殊接着層とすることができる。後者の特殊接着層は、特表2004−513801号公報において開示された、コンクリート又はモルタルの水和から生成する水酸化物と反応性を有する接着層であり、樹脂系シート21をコンクリートに定着させる定着層として好適に用いることができる。   The structure of the fixing layer is not particularly limited. For example, a fixing body having a three-dimensional structure such as a joining auxiliary fabric disclosed in Japanese Patent Application Laid-Open No. 2004-11169, or a special adhesive layer having fine protrusions can be used. The latter special adhesive layer is an adhesive layer that is reactive with a hydroxide generated from hydration of concrete or mortar, disclosed in JP-T-2004-513801, and fixes the resin-based sheet 21 to the concrete. It can be suitably used as a fixing layer.

前記樹脂系シート21の定着層を上面側として、円弧状型枠面2Aの上に樹脂系シート21を敷設したならば、真空ポンプ7を稼働させて真空チャンバ5内を所定の負圧状態とし、前記樹脂系シート21を開孔2a、2a…部分に生じる吸引力によってしっかりと固定する。この状態で開閉バルブ8を閉め固定状態を維持する。   When the resin-based sheet 21 is laid on the arcuate mold surface 2A with the fixing layer of the resin-based sheet 21 as the upper surface side, the vacuum pump 7 is operated to bring the inside of the vacuum chamber 5 into a predetermined negative pressure state. The resin-based sheet 21 is firmly fixed by the suction force generated in the openings 2a, 2a. In this state, the open / close valve 8 is closed and the fixed state is maintained.

次いで、図6に示されるように、鉄筋籠22や継手等を設置したならば、図7に示されるように、コンクリート23を打設する。この際、図示されるように、テーブルバイブレーター24によって振動を与えるようにする。なお、振動は棒状バイブレータや型枠に取り付けたバイブレータによって付与することも可能である。   Next, as shown in FIG. 6, when the reinforcing bar 22 and the joint are installed, the concrete 23 is placed as shown in FIG. At this time, vibration is applied by the table vibrator 24 as shown in the figure. In addition, vibration can also be provided by a vibrator attached to a rod-like vibrator or a mold.

打設後のコンクリート上面をコテによって均したならば、所定の時期に開閉バルブ8を開放し前記真空チャンバ5内を大気状態とする。その後硬化を待って、前記端面型枠3A、3Bを手動パンタジャッキ13の操作によって離反方向に移動させて脱型するとともに、前記側面型枠4A、4Bを図8に示されるように、離反方向に揺動させて脱型する。製造されたセグメントSは、樹脂系シート21の周縁がセグメントSの外形線よりも外側に突出しているため、この突出部分21a(周縁保持部)を切り落として製造を完了する。   When the concrete upper surface after placing is leveled with a trowel, the opening / closing valve 8 is opened at a predetermined time to bring the inside of the vacuum chamber 5 into an atmospheric state. Then, after curing, the end face molds 3A and 3B are moved away from the mold by operating the manual panter jack 13, and the side molds 4A and 4B are moved away from each other as shown in FIG. Swing to remove the mold. Since the periphery of the resin-based sheet 21 protrudes outside the outline of the segment S, the manufactured segment S is completed by cutting off the protruding portion 21a (periphery holding portion).

〔他の形態例〕
(1)上記形態例では、円弧状型枠面2Aを有する底版型枠2と、この底版型枠2の周方向端部から起立した起立型枠面11a、12aを有する端面型枠3A、3Bと、底版型枠2の側部から起立した起立型枠面15a、16aを有する側面型枠4A、4Bとからなる型枠装置とし、セグメントの内面が下側、上面が上側となるようにしたが、セグメントを縦置き状態とする型枠装置とすることも可能である。この型枠装置は、セグメントの外面及び内面に対応する円弧状型枠面を有する一対の側面型枠と、側面型枠間の底面を塞ぐように設けた底版型枠と、側面型枠間の端面を塞ぐように設けた端面型枠とからなる型枠装置である。この場合は、前記一対の側面型枠の内、セグメント内面に対応する側に真空チャンバを設けるようにする。
[Other examples]
(1) In the above embodiment, the end plate mold 2 having the arc-shaped mold surface 2A and the end surface molds 3A and 3B having the upright mold surfaces 11a and 12a raised from the circumferential end of the bottom mold 2 And a side frame 4A, 4B having upright mold surfaces 15a, 16a upstanding from the side of the bottom plate mold 2, and the inner surface of the segment is on the lower side and the upper surface is on the upper side. However, it is also possible to provide a formwork apparatus in which the segments are placed vertically. This formwork apparatus includes a pair of side face formwork having arcuate formwork faces corresponding to the outer and inner surfaces of a segment, a bottom formwork provided so as to close a bottom face between the side face formwork, and a side face formwork. It is a formwork apparatus consisting of an end face formwork provided so as to close the end face. In this case, a vacuum chamber is provided on the side corresponding to the inner surface of the segment among the pair of side surface molds.

1…内面被覆セグメント用型枠装置、2…底版型枠、2a…開孔、3A・3B…端面型枠、4A・4B…側面型枠、5…真空チャンバ、6…エア抜き管、7…真空ポンプ、8…開閉バルブ   DESCRIPTION OF SYMBOLS 1 ... Formwork apparatus for inner surface covering segments, 2 ... Bottom plate formwork, 2a ... Opening, 3A * 3B ... End face formwork, 4A * 4B ... Side face formwork, 5 ... Vacuum chamber, 6 ... Air vent pipe, 7 ... Vacuum pump, 8 ... Open / close valve

Claims (2)

セグメント用型枠装置のセグメント内面に対応する型枠面に樹脂系シートを固定し、型枠内にコンクリートを打設することにより前記樹脂系シートが一体化されたトンネル覆工用内面被覆セグメントを製造する方法において、
前記セグメント用型枠装置は、円弧状型枠面を有する底版型枠と、この底版型枠の周方向端部から起立した起立型枠面を有する端面型枠と、底版型枠の側部から起立した起立型枠面を有する側面型枠とを備えており、
前記セグメント内面に対応する型枠面に多数の開孔を全面に亘って形成するとともに、前記底版型枠の面の裏側に真空度を調整可能な真空チャンバを形成し、
前記底版型枠と前記端面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、かつ前記底版型枠と前記側面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、
前記底版型枠、端面型枠及び側面型枠を組み立て、前記底版型枠と端面型枠とによる隅角部に前記間隙が形成されるとともに、前記底版型枠と側面型枠とによる隅角部に前記間隙が形成された状態としておき、前記底版型枠の円弧状型枠面の上に樹脂系シートを敷設、樹脂系シートの周縁を前記隅角部に形成された前記間隙にそれぞれ挿入することによって保持するとともに、前記真空チャンバ内を所定の負圧状態とすることにより前記樹脂系シートを吸引力によって固定した状態で型枠内にコンクリートを打設することを特徴とするトンネル覆工用内面被覆セグメントの製造方法。
An inner surface covering segment for tunnel lining in which the resin-based sheet is integrated by fixing a resin-based sheet on a mold surface corresponding to the inner surface of the segment mold apparatus and placing concrete in the mold. In the manufacturing method,
The segment mold apparatus includes a bottom plate mold frame having an arc-shaped mold surface, an end surface mold frame having an upright mold surface rising from a circumferential end of the bottom mold frame, and a side portion of the bottom mold frame. A side mold having an upright mold frame surface,
A number of openings are formed over the entire surface of the mold corresponding to the inner surface of the segment, and a vacuum chamber capable of adjusting the degree of vacuum is formed on the back side of the surface of the bottom mold,
A gap for inserting a peripheral edge of the resin-based sheet along the surface direction of the bottom-plate mold is formed in a corner portion formed by the bottom-plate mold and the end-face mold, and the gap of the resin- based sheet is formed by the gap. parts is formed periphery holding portion of the resin-based sheet for holding, and the corner portion by said side mold and said bottom plate mold, inserting a peripheral portion of the resin sheet along the surface direction of the bottom plate formwork A gap for forming the peripheral edge of the resin-based sheet that holds the edge of the resin- based sheet is formed by the gap,
Assembling the bottom plate formwork, the end face formwork and the side face formwork, the gap is formed at the corners by the bottom plate formwork and the end face formwork, and the corners by the bottom plate formwork and the side face formwork wherein leave a state in which a gap is formed in the bottom plate mold a resin sheet is laid on top of the arcuate mold surface of each of the peripheral portions of the resin sheet into the gap formed in the corner A tunnel cover characterized in that concrete is placed in a mold with the resin-based sheet fixed by a suction force by holding the inside of the vacuum chamber in a predetermined negative pressure state while being inserted. Manufacturing method of inner surface covering segment for construction.
上記請求項1記載のトンネル覆工用内面被覆セグメントの製造方法のための型枠装置であって、
円弧状型枠面を有する底版型枠と、この底版型枠の周方向端部から起立した起立型枠面を有する端面型枠と、底版型枠の側部から起立した起立型枠面を有する側面型枠とを備えたセグメント用型枠装置において、
前記底版型枠の円弧状型枠面に多数の開孔を全面に亘って形成するとともに、裏面側に真空チャンバを形成し、
前記底版型枠と前記端面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、かつ前記底版型枠と前記側面型枠とによる隅角部に、前記底版型枠の面方向に沿って樹脂系シートの周縁部を挿入するための間隙が形成され、この間隙によって樹脂シートの縁部を保持する樹脂系シートの周縁保持部が形成され、
前記真空チャンバに1又は複数のエア抜き管を連結するとともに、このエア抜き管を真空ポンプに接続し、前記エア抜き管の中間に開閉バルブを設けたことを特徴とするセグメント用型枠装置。
A mold apparatus for a method for producing an inner surface covering segment for tunnel lining according to claim 1,
A bottom plate mold having an arcuate mold surface, an end surface mold having an upright frame surface standing from a circumferential end of the bottom plate frame, and an upright frame surface standing from a side of the bottom mold frame In the segment formwork apparatus provided with the side formwork,
A number of apertures are formed over the entire surface in the arc-shaped mold surface of the bottom plate mold, and a vacuum chamber is formed on the back side,
A gap for inserting a peripheral edge of the resin-based sheet along the surface direction of the bottom-plate mold is formed in a corner portion formed by the bottom-plate mold and the end-face mold, and the gap of the resin- based sheet is formed by the gap. parts is formed periphery holding portion of the resin-based sheet for holding, and the corner portion by said side mold and said bottom plate mold, inserting a peripheral portion of the resin sheet along the surface direction of the bottom plate formwork A gap for forming the peripheral edge of the resin-based sheet that holds the edge of the resin- based sheet is formed by the gap,
One or more air vent pipes are connected to the vacuum chamber, the air vent pipe is connected to a vacuum pump, and an open / close valve is provided in the middle of the air vent pipe.
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