JP2009091751A - Form for tunnel - Google Patents

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JP2009091751A
JP2009091751A JP2007261399A JP2007261399A JP2009091751A JP 2009091751 A JP2009091751 A JP 2009091751A JP 2007261399 A JP2007261399 A JP 2007261399A JP 2007261399 A JP2007261399 A JP 2007261399A JP 2009091751 A JP2009091751 A JP 2009091751A
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tunnel
concrete
placement space
lining concrete
formwork
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Osamu Suzuki
修 鈴木
Go Okukawa
剛 奥川
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Daiei Koki Kk
Nishimatsu Construction Co Ltd
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Daiei Koki Kk
Nishimatsu Construction Co Ltd
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Priority to JP2007261399A priority Critical patent/JP2009091751A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a form for a tunnel enabling the filled state of covering concrete in a placement space which is required to be inspected to be directly visible from the inside of the tunnel when the concrete is placed on the inner wall surface of the tunnel. <P>SOLUTION: This form 20 for a tunnel is used for forming the placement space 13 for placing the covering concrete 12 on the inner wall surface of the tunnel 10. The covering concrete 12 is sequentially placed through a pit mouth. A transparent inspection window 30 which is formed of a transparent material and through which the placement space 13 can be viewed from the inside of the tunnel is formed at only a portion to be inspected which is brought into contact with the placement space 20 which is positioned from the shoulders to the top of the tunnel 10 and between the overlapped part 28 and the placement hole 26 of the tunnel and required to be visually inspected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、トンネルの内壁面に覆工コンクリートを打設するための型枠に関するものである。   The present invention relates to a formwork for placing lining concrete on the inner wall surface of a tunnel.

一般に、トンネル内壁面をコンクリートで覆工する場合に、特許文献１記載のようなセントル台車に設けられているアーチ形状の型枠を用い、坑口から逐次、型枠が設けられた区間毎に、覆工コンクリートの打設を行うことがある。
このような型枠を用いて覆工コンクリートを打設する場合、トンネル内壁の側部から肩部にかけては、型枠の外周の状態等を確認するために、トンネル内壁の側部等にあたる部位の型枠に開口している開閉式（開閉蓋を有する）のオール検査窓から生コンクリートを流し込み、覆工コンクリートを立ち上げている。そして、オール検査窓の位置よりも上方にあたるトンネル内壁の天頂部は、打設空間に生コンクリートを流し込むために、型枠の最頂部に設けられている打設口に生コンクリートを圧送するための管を取り付け生コンクリートを流し込んで行っている。 In general, when lining the inner wall surface of the tunnel with concrete, using an arch-shaped formwork provided in a centle carriage as described in Patent Document 1, sequentially from the wellhead, for each section where the formwork is provided, Sometimes lining concrete is placed.
When lining concrete using such a formwork, from the side part of the tunnel inner wall to the shoulder part, in order to confirm the state of the outer periphery of the formwork, etc. Fresh concrete is poured from an all-inspection window that has an openable / closable (open / closed lid) opening in the formwork, and lining concrete is launched. And the top of the tunnel inner wall, which is above the position of the all inspection window, is used to pump the ready-mixed concrete into the casting port provided at the top of the formwork in order to pour the ready-mixed concrete into the casting space. The pipe is installed and poured with ready-mixed concrete.

しかし、打設口は、既設の覆工コンクリートの端面から０．５〜１．０ｍくらい離れたところに設けられているため、既設の覆工コンクリートの端面から打設口にかけてのトンネル内壁の天頂部は、空気が残り易くコンクリートの充填不良が起こり易い。その上、天頂部においてトンネルの内側は打設空間の下方になるため、開閉式の検査窓を設けても開閉蓋を開けてコンクリートの充填状況を確認することができない。そのため、確認する手段としては、打設空間内の空気を抜くために設けられているエアー抜き金具からの生コンクリートの漏れ具合や、打設口への生コンクリートの圧送の停止等による、間接的な方法で確認するしかなく、経験と勘が必要となる。そのため、コンクリートの充填状況に応じて、バイブレータの挿入等の適切な対応を取ることが難しかった。
特開２０００−３０３７９５号公報 However, since the casting port is provided at a distance of about 0.5 to 1.0 m from the end surface of the existing lining concrete, the ceiling of the tunnel inner wall from the end surface of the existing lining concrete to the casting port is provided. At the top, air is likely to remain and poor filling of the concrete tends to occur. In addition, since the inside of the tunnel is located below the placement space at the zenith, even if an opening / closing type inspection window is provided, the opening / closing lid cannot be opened to check the concrete filling state. Therefore, as a means of confirmation, indirect measures such as leakage of ready-mixed concrete from the air vent fittings provided to extract the air in the placement space, stoppage of ready-mixed concrete feed to the placement opening, etc. It must be confirmed by simple methods and requires experience and intuition. For this reason, it has been difficult to take appropriate measures such as inserting a vibrator in accordance with the concrete filling condition.
JP 2000-303795 A

そこで、本発明は、トンネルの内壁面に覆工コンクリートを打設するときに、検査が必要な打設空間内におけるコンクリートの充填状況を、トンネルの内側から直接目視できるトンネル用型枠を提供することを目的とする。   Therefore, the present invention provides a tunnel formwork in which when concrete is placed on the inner wall surface of a tunnel, the concrete filling state in the placement space that needs to be inspected can be directly observed from the inside of the tunnel. For the purpose.

上記目的を達成するため、本発明のトンネル用型枠は、トンネルの内壁面に覆工コンクリートを打設する打設空間を形成するために用いられるトンネル用型枠であって、目視による検査が必要な打設空間に接する要検査部位のみに、透明素材からなりトンネルの内側から打設空間を目視できる透明検査窓を設けたことを特徴とする。   In order to achieve the above object, the tunnel form of the present invention is a tunnel form used for forming a placement space for placing lining concrete on the inner wall surface of the tunnel, and is visually inspected. A transparent inspection window that is made of a transparent material and can be visually observed from the inside of the tunnel is provided only in the inspection required portion that is in contact with the required placement space.

覆工コンクリートとしては、特に限定はされないが、掘削された岩盤面に直に接する一次覆工コンクリートであってもよいし、一次覆工コンクリートの内側（トンネル側）に設けられる二次覆工コンクリートであってもよい。また、坑口から逐次打設されることが好ましい。また、補強用鉄筋を内部に有していてもよいし、有していなくてもよい。   The lining concrete is not particularly limited, but may be primary lining concrete that is in direct contact with the excavated rock surface, or secondary lining concrete provided on the inner side (tunnel side) of the primary lining concrete. It may be. Moreover, it is preferable to drive sequentially from the wellhead. Moreover, the reinforcing steel bars may or may not be provided inside.

要検査部位は、特に限定はされないが、型枠の外周面（打設空間と接する面）が湾曲していることで型枠に開口している既存の開閉式の検査窓からの検査が難しい、トンネルの肩口から天頂にあたる部位や、覆工コンクリートが坑口から逐次打設され場合には、既設の覆工コンクリートの端面から打設空間内に生コンクリートを流し込んでいる打設口までの間において、コンクリートの充填不良が起こり易いことから、既設の覆工コンクリートのトンネル内面を覆うため、トンネル用型枠の坑口側の端部に設けられているオーバーラップ部と、打設空間内に生コンクリートを流し込むため、トンネル用型枠に設けられている打設口との間等にある。   The inspection site is not particularly limited, but it is difficult to inspect from the existing open / close type inspection window opened in the mold because the outer peripheral surface of the mold (the surface in contact with the placement space) is curved. In the case where the site corresponding to the zenith from the shoulder of the tunnel or the lining concrete is sequentially cast from the pit, between the end surface of the existing lining concrete and the casting port where the ready-mixed concrete is poured into the casting space In order to cover the tunnel inner surface of the existing lining concrete because the concrete filling failure tends to occur, the overlap part provided at the end of the tunnel form on the wellhead side and ready-mixed concrete in the placement space In order to flow in, it is located between the casting opening provided in the tunnel formwork.

透明素材としては、特に限定はされないが、透明な樹脂等が好ましく、具体的には、ポリカーボネート樹脂、アクリル樹脂等が例示できる。   Although it does not specifically limit as a transparent material, Transparent resin etc. are preferable, and a polycarbonate resin, an acrylic resin, etc. can be illustrated specifically ,.

透明検査窓の態様としては、特に限定はされないが、トンネル用型枠に着脱不能に設けられている態様でもよいし、トンネル用型枠に着脱可能に設けられている態様でもよい。充填不良時等にバイブレータ等の挿入が容易であることから、トンネルの内側へ外せるように取付けられている態様が好ましい。   Although it does not specifically limit as an aspect of a transparent inspection window, The aspect provided in the mold form for tunnels so that attachment or detachment is possible may be sufficient, and the aspect provided in the formwork for tunnels so that attachment or detachment is possible may be sufficient. Since it is easy to insert a vibrator or the like at the time of poor filling or the like, a mode in which the vibrator is attached so as to be removed inside the tunnel is preferable.

本発明によれば、トンネルの内壁面に覆工コンクリートを打設するときに、検査が必要な打設空間内におけるコンクリートの充填状況を、トンネルの内側から直接目視できるトンネル用型枠を提供することができる。   According to the present invention, there is provided a tunnel form in which when concrete is placed on the inner wall surface of a tunnel, the concrete filling state in the placement space that requires inspection can be directly observed from the inside of the tunnel. be able to.

トンネルの内壁面に覆工コンクリートを打設する打設空間を形成するために用いられるトンネル用型枠であって、
覆工コンクリートが坑口から逐次打設されるものであり、
トンネルの肩口から天頂にあたる部位にあり、かつ、既設の覆工コンクリートのトンネル内面を覆うため、トンネル用型枠の坑口側の端部に設けられているオーバーラップ部と、打設空間内に生コンクリートを流し込むため、トンネル用型枠に設けられている打設口との間にある目視による検査が必要な打設空間に接する要検査部位のみに、透明素材からなりトンネルの内側から打設空間を目視できる透明検査窓をトンネルの内側へ外せるように取付けられていることを特徴とするトンネル用型枠。 A tunnel form used to form a placement space for placing lining concrete on the inner wall surface of the tunnel,
The lining concrete is placed sequentially from the wellhead,
It is located at the site from the shoulder of the tunnel to the zenith and covers the tunnel inner surface of the existing lining concrete. Casting space from the inside of the tunnel, made of transparent material, only on the inspection site that is in contact with the casting space that needs visual inspection between the casting port provided in the tunnel formwork for pouring concrete A tunnel formwork that is mounted so that a transparent inspection window that can be seen can be removed inside the tunnel.

以下、本実施例のトンネル用型枠２０を図面に基づいて説明する。
図１〜４に示すように、地山を掘削して形成された略蒲鉾状の掘削孔であるトンネル１０の内面には、コンクリートを吹き付けることにより一次覆工コンクリート１１が形成されている。この一次覆工コンクリート１１の内側には、二次覆工コンクリート１２が坑口から逐次打設されるようになっている。二次覆工コンクリート１２は、一次覆工コンクリート１１の内面と、セントル台車４０によって支持された本実施例のトンネル用型枠２０の外周面とによって囲まれるようにして形成された打設空間１３に、生コンクリートを流し込むことにより打設される。なお、二次覆工コンクリート１２は、坑口から逐次打設されるため、打設空間１３のトンネル長さ方向の一端（坑口側）は既設の二次覆工コンクリート１２の端面１２ｂで塞がれ、他端（切羽側）は流し込んだ生コンクリートの流出を防止するために設けられている妻型枠１４で塞がれている。 Hereinafter, the tunnel form 20 of the present embodiment will be described with reference to the drawings.
As shown in FIGS. 1-4, the primary lining concrete 11 is formed by spraying concrete on the inner surface of the tunnel 10 which is a substantially bowl-shaped excavation hole formed by excavating a natural ground. Inside the primary lining concrete 11, secondary lining concrete 12 is sequentially driven from the wellhead. The secondary lining concrete 12 is a placement space 13 formed so as to be surrounded by the inner surface of the primary lining concrete 11 and the outer peripheral surface of the tunnel form 20 of this embodiment supported by the centre carriage 40. It is placed by pouring ready-mixed concrete. In addition, since the secondary lining concrete 12 is sequentially driven from the wellhead, one end (wellhead side) of the placement space 13 in the tunnel length direction is blocked by the end surface 12b of the existing secondary lining concrete 12. The other end (face side) is closed with a wife form 14 provided to prevent the poured concrete from flowing out.

図２に示すように、セントル台車４０は、作業者が作業等を行うための足場となる台面４１と、トンネルの床面に敷設された床レール４２上に設置され、床レール４２上を転動する車輪４３と、本実施例のトンネル用型枠２０を保持するターンパックル４５と、本実施例のトンネル用型枠２０を昇降するジャッキ４６とを備えている。   As shown in FIG. 2, the centre cart 40 is installed on a platform 41 that serves as a scaffold for an operator to perform work and the floor rail 42 laid on the floor of the tunnel. The wheel 43 which moves, the turn puckle 45 which hold | maintains the tunnel formwork 20 of a present Example, and the jack 46 which raises / lowers the tunnel formwork 20 of a present Example are provided.

図１〜３に示すように、本実施例のトンネル用型枠２０は、台面４１に突設している支柱４７によって支えられ、トンネル１０の肩口から天頂にあたる部位を覆い、トンネル径方向断面形状が略円弧状の天頂部２１と、天頂部２１のトンネル周方向両端に連結され、トンネル１０の肩口から下方の部位を覆い、トンネル径方向断面形状が略円弧状の一対の側部２２と、既設の二次覆工コンクリート１２のトンネル内面を覆うため、本実施例のトンネル用型枠２０の坑口側の端部に設けられているオーバーラップ部２８とを有する。また、天頂部２１と側部２２は、共に略この断面形状のままトンネル長さ方向に延びている。   As shown in FIGS. 1 to 3, the tunnel mold 20 according to the present embodiment is supported by a column 47 projecting from the base surface 41, covers a portion corresponding to the zenith from the shoulder of the tunnel 10, and has a sectional shape in the tunnel radial direction. Are connected to both ends of the zenith portion 21 in the circumferential direction of the tunnel, cover a portion below the shoulder opening of the tunnel 10, and a pair of side portions 22 having a substantially arc-shaped cross section in the tunnel radial direction, In order to cover the tunnel inner surface of the existing secondary lining concrete 12, it has the overlap part 28 provided in the edge part by the side of the wellhead of the tunnel formwork 20 of a present Example. Moreover, both the zenith part 21 and the side part 22 are extended in the tunnel length direction with substantially this cross-sectional shape.

天頂部２１及び側部２２は、それぞれ打設空間１３と接する表層部２３と、表層部２３を補強するため、表層部２３の打設空間１３に接する面と反対の面に着接されたスチフナー２４と、を有する。   The zenith portion 21 and the side portion 22 are respectively a surface layer portion 23 in contact with the placement space 13, and a stiffener attached to a surface opposite to the surface in contact with the placement space 13 of the surface layer portion 23 in order to reinforce the surface layer portion 23. 24.

側部２２には、外周の状態等を確認するため、複数の開閉式のオール検査窓２５が開口している。各オール検査窓２５には、生コンクリート充填時等に生コンクリートの流出を防止するための開閉蓋２５ａが設けられている。   In the side portion 22, a plurality of openable all-inspection windows 25 are opened in order to confirm the state of the outer periphery and the like. Each all inspection window 25 is provided with an open / close lid 25a for preventing the ready-mixed concrete from flowing out when the ready-mixed concrete is filled.

天頂部２１には、打設空間１３に流し込む生コンクリートを圧送するための管の先端を取り付け、そこから打設空間１３内に生コンクリートを流し込むための打設口２６が最頂部に二ヶ所開口している。また、トンネル長さ方向に位置を変えた最頂部には、複数の開閉式の天検査窓２７が開口している。各天検査窓２７には、オール検査窓２５と同じく、生コンクリート充填時等に生コンクリートの流出を防止するための開閉蓋２７ａが設けられている。   The top of the zenith part 21 is attached with a tip of a pipe for pumping the ready-mixed concrete poured into the casting space 13, and two casting openings 26 for pouring the ready-mixed concrete into the casting space 13 are opened at two points at the top. is doing. In addition, a plurality of openable ceiling inspection windows 27 are opened at the topmost portion whose position is changed in the tunnel length direction. Each top inspection window 27 is provided with an open / close lid 27a for preventing the ready-mixed concrete from flowing out when the ready-mixed concrete is filled, like the all-inspected window 25.

さらに、オーバーラップ部２８と、既設の二次覆工コンクリート１２の端面１２ｂに一番近い打設口２６との間には、透明検査窓３０がトンネル径方向の同一断面上に４つ設けられている。   Further, four transparent inspection windows 30 are provided on the same cross section in the tunnel radial direction between the overlap portion 28 and the placement port 26 closest to the end surface 12b of the existing secondary lining concrete 12. ing.

図４に示すように、透明検査窓３０は、略正方形の板状のポリカーボネート樹脂からなる窓板３１と、窓板３１の周囲の四辺を取り囲んで補強し、窓板３１が嵌合している枠状の窓フレーム３２とを有する。窓フレーム３２は、透明検査窓３０の設置場所として天頂部２１に設けられた四箇所の開口にそれぞれトンネルの内側へ外せるよう、四隅がボルト３４及び固定片３５を介してスチフナー２４に固定されている。なお、窓フレーム３２をトンネルの内側へ外せるよう開口に固定する方法は、ボルトを用いる方法以外のフレーム等を着脱可能に固定する一般的な方法でもよい。   As shown in FIG. 4, the transparent inspection window 30 is reinforced by surrounding and reinforcing the window plate 31 made of a substantially square plate-like polycarbonate resin and the four sides around the window plate 31. A frame-like window frame 32. The four corners of the window frame 32 are fixed to the stiffener 24 via bolts 34 and fixing pieces 35 so that the window frame 32 can be removed to the inside of the tunnel through four openings provided in the zenith portion 21 as installation locations of the transparent inspection window 30. Yes. The method of fixing the window frame 32 to the opening so as to be removed to the inside of the tunnel may be a general method of detachably fixing the frame or the like other than the method of using bolts.

本実施例のトンネル用型枠２０によれば、次の（ａ）〜（ｅ）の効果が得られる。
（ａ）既設の二次覆工コンクリート１２の端面１２ｂから打設口２６にかけての天頂部２１に透明検査窓３０を設けることにより、トンネルの内壁面に二次覆工コンクリート１２を打設するときに、空気が残りコンクリートの充填不良が起こり易い打設空間１３内の充填状況をトンネルの内側から直接目視できる。
（ｂ）充填不良が起こり易い部位を直接目視できることにより、バイブレータの挿入等の充填不良への対応が適切に行える。
（ｃ）窓フレーム３２により補強された窓板３１を透明検査窓３０として、コンクリートの充填不良が起こり易いため検査が必要な天頂部２１の一部のみに設けることで、窓板３１を薄くでき、かつ、透明な樹脂であるポリカーボネート樹脂の使用量を少なくできる。
（ｄ）透明な窓板３１が嵌合している窓フレーム３２を、天頂部２１の開口にそれぞれボルト３４により固定していることで、繰り返し使用することにより透明な窓板３１が劣化（曇り）した場合等に容易に交換することができる。
（ｅ）透明検査窓３０をトンネルの内側へ外せるように取付けられていることから、充填不良時等に透明検査窓３０を外し、そこからバイブレーター等の挿入を行える。 According to the tunnel mold 20 of the present embodiment, the following effects (a) to (e) can be obtained.
(A) When placing the secondary lining concrete 12 on the inner wall surface of the tunnel by providing a transparent inspection window 30 at the zenith 21 from the end surface 12b of the existing secondary lining concrete 12 to the placement opening 26 In addition, the filling condition in the placement space 13 where air remains and the filling failure of the concrete is likely to occur can be directly observed from the inside of the tunnel.
(B) Since the portion where filling failure is likely to occur can be directly observed, it is possible to appropriately cope with filling failure such as insertion of a vibrator.
(C) Since the window plate 31 reinforced by the window frame 32 is used as the transparent inspection window 30 and is provided only in a part of the zenith portion 21 that needs to be inspected because a concrete filling defect is likely to occur, the window plate 31 can be thinned. And the usage-amount of the polycarbonate resin which is transparent resin can be decreased.
(D) Since the window frame 32 in which the transparent window plate 31 is fitted is fixed to the opening of the zenith portion 21 with the bolts 34, the transparent window plate 31 is deteriorated (cloudy) by repeated use. ) Can be easily replaced.
(E) Since the transparent inspection window 30 is attached so as to be removed to the inside of the tunnel, the transparent inspection window 30 can be removed at the time of filling failure, and a vibrator or the like can be inserted therefrom.

図５、６に示すように、本実施例のトンネル用型枠５０は、実施例１のトンネル用型枠２０の態様と比べ、透明検査窓５１の態様が異なる以外は、同じである。従って、実施例１と異なる透明検査窓５１についてのみ説明する。   As shown in FIGS. 5 and 6, the tunnel mold 50 according to the present embodiment is the same as the tunnel mold 20 according to the first embodiment except that the aspect of the transparent inspection window 51 is different. Therefore, only the transparent inspection window 51 different from the first embodiment will be described.

透明検査窓５１は、オーバーラップ部２８と既設の二次覆工コンクリート１２の端面１２ｂに一番近い打設口２６との間の天頂部２１に、端面１２ｂに沿うよう、最頂部付近から肩口部にかて帯状に設けられている。   The transparent inspection window 51 extends from the vicinity of the top to the zenith 21 between the overlap portion 28 and the placement port 26 closest to the end surface 12b of the existing secondary lining concrete 12 so as to be along the end surface 12b. It is provided in the shape of a band on the part.

透明検査窓５１には、略矩形であり、打設空間１３に接する面の反対の面に略「目」の字状のリブ５２ｃを有するポリカーボネートからなる窓板５２を、この窓板５２の長手方向に沿い、リブ５２ｃを有する面から当接して補強する箱状の窓フレーム５３に、ネジ５４により取着させたものが嵌合している。   In the transparent inspection window 51, a window plate 52 made of polycarbonate having a rib 52 c having a substantially “eye” shape on the surface opposite to the surface in contact with the placement space 13 is provided. Along the direction, a box-shaped window frame 53 which is reinforced by abutting from a surface having ribs 52c is fitted with a screw 54 attached thereto.

本実施例のトンネル用型枠５０によれば、上記（ａ）〜（ｄ）の効果に加え、さらに次の（ｆ）の効果が得られる。
（ｆ）透明検査窓５１が最頂部付近から肩口部にかて帯状に設けられることで、打設空間１３内におけるコンクリートの充填状況をトンネルの内側から直接目視できる範囲が広くなる。 According to the tunnel mold 50 of the present embodiment, the following effect (f) can be obtained in addition to the effects (a) to (d).
(F) Since the transparent inspection window 51 is provided in a band shape from the vicinity of the top portion to the shoulder opening portion, the range in which the concrete filling state in the placement space 13 can be directly observed from the inside of the tunnel becomes wide.

なお、本発明は前記実施例に限定されるものではなく、発明の趣旨から逸脱しない範囲で適宜変更して具体化することもできる。   In addition, this invention is not limited to the said Example, In the range which does not deviate from the meaning of invention, it can change suitably and can be actualized.

本発明の実施例１のトンネル用型枠の斜視図である。It is a perspective view of the form for tunnels of Example 1 of the present invention. 同トンネル用型枠を用いたセントル台車の正面図である。It is a front view of the centle cart using the form for tunnels. 同トンネル用型枠を用いたトンネルの最頂部付近の長さ方向の断面図である。It is sectional drawing of the length direction near the top part of the tunnel using the same form for tunnels. 同トンネル用型枠の透明検査窓の拡大図である。It is an enlarged view of the transparent inspection window of the form for tunnels. 本発明の実施例２のトンネル用型枠の斜視図である。It is a perspective view of the form for tunnels of Example 2 of the present invention. 同トンネル用型枠の透明検査窓の拡大図である。It is an enlarged view of the transparent inspection window of the form for tunnels.

符号の説明Explanation of symbols

１０ トンネル
１２ 二次覆工コンクリート
１３ 打設空間
２０ トンネル用型枠
２１ 天頂部
２６ 打設口
２８ オーバーラップ部
３０ 透明検査窓
３１ 窓板
５０ トンネル用型枠
５１ 透明検査窓
５２ 窓板 DESCRIPTION OF SYMBOLS 10 Tunnel 12 Secondary lining concrete 13 Casting space 20 Tunnel formwork 21 Zenith part 26 Placing port 28 Overlap part 30 Transparent inspection window 31 Window board 50 Tunnel formwork 51 Transparent inspection window 52 Window board

Claims (4)

トンネルの内壁面に覆工コンクリートを打設する打設空間を形成するために用いられるトンネル用型枠であって、
目視による検査が必要な前記打設空間に接する要検査部位のみに、透明素材からなりトンネルの内側から該打設空間を目視できる透明検査窓を設けたことを特徴とするトンネル用型枠。 A tunnel form used to form a placement space for placing lining concrete on the inner wall surface of the tunnel,
A tunnel formwork characterized in that a transparent inspection window made of a transparent material is provided only at a site to be in contact with the placement space that needs to be visually inspected so that the placement space can be seen from the inside of the tunnel. 前記要検査部位がトンネルの肩口から天頂にあたる部位にある請求項１記載のトンネル用型枠。   The tunnel formwork according to claim 1, wherein the site to be inspected is at a site corresponding to the zenith from the shoulder of the tunnel. 前記覆工コンクリートが坑口から逐次打設されるものであり、前記要検査部位が既設の覆工コンクリートのトンネル内面を覆うため、前記トンネル用型枠の坑口側の端部に設けられているオーバーラップ部と、前記打設空間内に生コンクリートを流し込むため、該トンネル用型枠に設けられている打設口との間にある請求項１又は２記載のトンネル用型枠。   The lining concrete is sequentially cast from the wellhead, and the inspection required part covers the tunnel inner surface of the existing lining concrete, so that it is provided at the end on the wellhead side of the tunnel formwork. The tunnel formwork according to claim 1 or 2, which is located between the lap portion and a placement opening provided in the tunnel formwork for pouring ready concrete into the placement space. 前記透明検査窓がトンネルの内側へ外せるように取付られている請求項１〜３のいずれか一項に記載のトンネル用型枠。   The tunnel formwork according to any one of claims 1 to 3, wherein the transparent inspection window is attached so as to be removed to the inside of the tunnel.
JP2007261399A 2007-10-04 2007-10-04 Form for tunnel Pending JP2009091751A (en)

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JP2020117947A (en) * 2019-01-24 2020-08-06 舩木商事有限会社 Form panel structure for concrete placing provided with view window
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JP2011017127A (en) * 2009-07-07 2011-01-27 As Giken Kk Hollow cylindrical body
JP2011099228A (en) * 2009-11-05 2011-05-19 Maeda Corp Method of compacting crest part of tunnel lining
JP2013087591A (en) * 2011-10-21 2013-05-13 Shimizu Corp Checking method and improvement method for deformation characteristic of back-filling material, and segment assembly timbering body
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CN108104843A (en) * 2018-02-08 2018-06-01 中铁五局集团有限公司 Tunnel is without empty lining trolley
JP2020117947A (en) * 2019-01-24 2020-08-06 舩木商事有限会社 Form panel structure for concrete placing provided with view window
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JP2021085148A (en) * 2019-11-25 2021-06-03 前田建設工業株式会社 Concrete placing height instruction apparatus in tunnel lining
JP7294995B2 (en) 2019-11-25 2023-06-20 前田建設工業株式会社 Concrete pouring height indicator for tunnel lining

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