JP2012046943A - Method and device for placing lining concrete wall in tunnel - Google Patents

Method and device for placing lining concrete wall in tunnel Download PDF

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JP2012046943A
JP2012046943A JP2010189313A JP2010189313A JP2012046943A JP 2012046943 A JP2012046943 A JP 2012046943A JP 2010189313 A JP2010189313 A JP 2010189313A JP 2010189313 A JP2010189313 A JP 2010189313A JP 2012046943 A JP2012046943 A JP 2012046943A
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tunnel
longitudinal direction
supply pipe
concrete
flexible discharge
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JP5480067B2 (en
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Tomihiro Tanase
富弘 棚瀬
Masato Aoi
雅人 青井
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Gifu Industry Co Ltd
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Gifu Industry Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To easily place a lining concrete wall in a tunnel without using an inspection window as a placement hole.SOLUTION: A side of a base end connection portion 10a of a flexible discharge pipe 10, which is connected to a movable supply pipe 4 on both sides in a width direction Y of a tunnel, orthogonal to a longitudinal direction X of the tunnel, in a predetermined position on a top portion of a lining concrete wall placement form 2 disposed in the tunnel and which is inserted into a placement chamber in the form 2 via a guide roller 9a for the change of the direction, is moved in the longitudinal direction X of the tunnel together with the movable supply pipe 4 by transfer means 12. In this case, while positions of leading end discharge portions of both flexible discharge pipes 10 inserted into the placement chamber in the form 2 via the guide roller 9a for the change of the direction are adjusted in the circumferential direction of the tunnel, concrete supplied into the movable supply pipe 4 is discharged into the placement chamber in the form 2 from the leading end discharge portion of the flexible discharge pipe 10, and the concrete is sequentially placed toward the top portion of the form 2 from the downside of the placement chamber to the upside thereof.

Description

本発明は、トンネル内に配設される覆工コンクリート壁打設型枠に覆工コンクリート壁を打設する打設方法及び打設装置に係り、特に流動性の高いコンクリートに適した打設方法及び打設装置に関するものである。   The present invention relates to a placing method and a placing apparatus for placing a covering concrete wall on a covering concrete wall placing form disposed in a tunnel, and particularly, a placing method suitable for highly fluid concrete. And a driving device.

従来、この種の覆工コンクリート壁打設装置において、コンクリートは覆工コンクリート壁打設型枠内に上側から下側へ流し落とされて覆工コンクリート壁打設型枠内全体で充填されていた。このように硬化前の練り混ぜられたコンクリートを流し落とすと、コンクリートの成分が分離したりコンクリートに気泡が混入したりするため、覆工コンクリート壁の表面が不良状態になるおそれがあった。   Conventionally, in this type of lining concrete wall casting apparatus, concrete has been poured into the lining concrete wall casting mold from the upper side to the lower side and filled in the entire lining concrete wall casting mold. . When the concrete mixed before being cured is poured off, the concrete components are separated or air bubbles are mixed into the concrete, which may cause the surface of the lining concrete wall to be in a poor state.

そこで、例えば下記の特許文献１では、トンネル内に配設される覆工コンクリート壁打設型枠に検査窓（打設孔）をトンネルの長手方向に対し直交するトンネルの幅方向両側でそれぞれトンネルの周方向に沿って複数配設するとともに、この各検査窓（打設孔）にコンクリートポンプをコンクリート供給切換手段（コンクリート分流機やエレファントノズルなど）を介して接続し、トンネルの幅方向両側にある各検査窓（打設孔）のうち下側にある各検査窓（打設孔）から上側にある各検査窓（打設孔）へ順次このコンクリートポンプからコンクリートをこのコンクリート供給切換手段により供給するようになっている。このように覆工コンクリート壁打設型枠内でコンクリートを下側から順次押し上げて打設すると、覆工コンクリート壁の表面が良好な状態に仕上がる。   Therefore, for example, in Patent Document 1 below, tunnels are placed on both sides in the width direction of the tunnel orthogonal to the longitudinal direction of the tunnel in the lining concrete wall casting form disposed in the tunnel. The concrete pump is connected to each inspection window (placed hole) via a concrete supply switching means (concrete diverter, elephant nozzle, etc.), and on both sides of the tunnel in the width direction. Concrete from this concrete pump is supplied in turn by this concrete supply switching means from each inspection window (placement hole) on the lower side of each inspection window (placement hole) to each inspection window (placement hole) on the upper side. It is supposed to be. Thus, when concrete is pushed up sequentially from the lower side in the lining concrete wall casting form, the surface of the lining concrete wall is finished in a good state.

特開２００９−１５５８１９号公報JP 2009-155819 A

しかし、トンネルの長手方向及び幅方向両側でトンネルの周方向に沿って複数配設された各検査窓（打設孔）のうち下側にある各検査窓（打設孔）から上側にある各検査窓（打設孔）へ順次コンクリートを打設する場合、その打設場所を変更するごとに、コンクリートポンプをコンクリート供給切換手段（コンクリート分流機やエレファントノズルなど）を介して接続する必要があるため、打設場所の変更に多大な時間と労力を要していた。   However, each of the inspection windows (placement holes) on the upper side from the inspection windows (placement holes) on the lower side among the plurality of inspection windows (placement holes) arranged along the circumferential direction of the tunnel on both the longitudinal direction and the width direction of the tunnel. When placing concrete sequentially into the inspection window (placement hole), it is necessary to connect the concrete pump via concrete supply switching means (concrete diverter, elephant nozzle, etc.) each time the placement location is changed. Therefore, it took a lot of time and labor to change the placement location.

また、各検査窓（打設孔）はトンネルの長手方向へ所定間隔で配設され、その各検査窓（打設孔）の数が制限されてそれらの間隔をある程度離す必要があるため、各検査窓（打設孔）から打設されたコンクリートは各検査窓（打設孔）に面する打設室の一部に供給された後にトンネルの長手方向の両側に流れ、打設と同時に行うバイブレータによる締め固めが難しくなるとともに、その流れによる流れ縞が生じ易い。さらに、各検査窓（打設孔）はトンネルの周方向へ所定間隔で配設され、その各検査窓（打設孔）の数が制限されてそれらの間隔をある程度離す必要があるため、各検査窓（打設孔）から打設されたコンクリートの落下高さが高くなり、コンクリートの成分が分離したりコンクリートに気泡が混入したりして、覆工コンクリート壁の表面が不良状態になるおそれがあった。   In addition, each inspection window (placement hole) is arranged at a predetermined interval in the longitudinal direction of the tunnel, and the number of each inspection window (placement hole) is limited, and it is necessary to separate those intervals to some extent. The concrete cast from the inspection window (placement hole) is supplied to a part of the placement room facing each inspection window (placement hole) and then flows to both sides in the longitudinal direction of the tunnel, and is performed simultaneously with the placement. It becomes difficult to compact with a vibrator, and flow streaks due to the flow tend to occur. Furthermore, since each inspection window (placement hole) is arranged at a predetermined interval in the circumferential direction of the tunnel, the number of each inspection window (placement hole) is limited and it is necessary to separate those intervals to some extent. The fall height of the concrete placed from the inspection window (placement hole) becomes high, and the concrete components may be separated or air bubbles may be mixed into the concrete, causing the surface of the lining concrete wall to become defective. was there.

この発明は、従来技術と比較して、各検査窓を打設孔として利用せずに、特に流動性の高いコンクリートに適した打設方法及び打設装置において、トンネル内の覆工コンクリート壁の打設を容易に行うことを目的としている。   Compared with the prior art, the present invention provides a placement method and placement apparatus suitable for concrete with high fluidity without using each inspection window as a placement hole. The purpose is to facilitate placement.

後記実施形態の図面（図１〜２）の符号を援用して本発明を説明する。
請求項１の発明にかかるトンネル内の覆工コンクリート壁打設方法は、下記のように構成されている。 The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 and 2) of the embodiments described later.
The lining concrete wall placing method in a tunnel according to the invention of claim 1 is configured as follows.

トンネル１内に配設される覆工コンクリート壁打設型枠２の頂部の所定位置において、トンネル１の長手方向Ｘに対し直交するトンネル１の幅方向Ｙの両側で可動供給管４に接続されて向き転換用のガイド９ａを介して型枠２内の打設室３に挿入された可撓排出管１０の基端接続部１０ａ側を可動供給管４と共にトンネル１の長手方向Ｘへ移送手段１２により移動させた際に、向き転換用のガイド９ａを介して型枠２内の打設室３に挿入された両可撓排出管１０の先端排出部１０ｂの位置をトンネル１の周方向Ｒで調節しながら、この可動供給管４に供給されたコンクリートをこの可撓排出管１０の先端排出部１０ｂから型枠２内の打設室３に排出して、その打設室３の下側から上側へ型枠２の頂部に向けて順次、コンクリートを打設する。   Connected to the movable supply pipe 4 on both sides in the width direction Y of the tunnel 1 perpendicular to the longitudinal direction X of the tunnel 1 at a predetermined position on the top of the lining concrete wall casting form 2 disposed in the tunnel 1. A means for transferring the flexible discharge pipe 10 into the longitudinal direction X of the tunnel 1 together with the movable supply pipe 4 through the flexible discharge pipe 10 inserted into the placement chamber 3 in the mold 2 via the guide 9a for turning the direction. 12, the position of the distal end discharge part 10 b of both flexible discharge pipes 10 inserted into the placement chamber 3 in the mold 2 via the guide 9 a for changing the direction is set in the circumferential direction R of the tunnel 1. The concrete supplied to the movable supply pipe 4 is discharged from the distal end discharge portion 10b of the flexible discharge pipe 10 to the placement chamber 3 in the mold 2 while adjusting the position of the placement chamber 3. The concrete is placed sequentially from the top to the top of the mold 2.

請求項２の発明にかかるトンネル内の覆工コンクリート壁打設装置は、請求項１の発明にかかるトンネル内の覆工コンクリート壁打設方法の実施に適し、下記のように構成されている。   The lining concrete wall placing apparatus in the tunnel according to the invention of claim 2 is suitable for carrying out the lining concrete wall placing method in the tunnel according to the invention of claim 1, and is configured as follows.

トンネル１内に配設される覆工コンクリート壁打設型枠２の頂部に可動供給管４をトンネル１の長手方向Ｘへ移送手段１２により移動可能に設けている。この可動供給管４には型枠２の頂部の所定位置でトンネル１の長手方向Ｘに対し直交するトンネル１の幅方向Ｙの両側に配設した向き転換用のガイド９ａを介して型枠２内の打設室３に挿入される可撓排出管１０を接続している。その可動供給管４に接続された両可撓排出管１０の基端接続部１０ａ側を可動供給管４と共にトンネル１の長手方向Ｘへ移送手段１２により移動させた際に、型枠２の頂部の所定位置で、向き転換用のガイド９ａを介して型枠２内の打設室３に挿入された両可撓排出管１０の先端排出部１０ｂの位置をトンネル１の周方向Ｒで調節可能にした。   A movable supply pipe 4 is provided at the top of the lining concrete wall casting form 2 disposed in the tunnel 1 so as to be movable by the transfer means 12 in the longitudinal direction X of the tunnel 1. The movable supply pipe 4 is connected to the mold 2 via guides 9a for changing the direction arranged on both sides of the width direction Y of the tunnel 1 perpendicular to the longitudinal direction X of the tunnel 1 at a predetermined position on the top of the mold 2. A flexible discharge pipe 10 to be inserted into the inner placement chamber 3 is connected. When the proximal end connecting portion 10a side of both flexible discharge pipes 10 connected to the movable supply pipe 4 is moved together with the movable supply pipe 4 in the longitudinal direction X of the tunnel 1 by the transfer means 12, the top of the mold 2 The position of the tip discharge part 10b of both flexible discharge pipes 10 inserted into the placement chamber 3 in the mold 2 can be adjusted in the circumferential direction R of the tunnel 1 through the guide 9a for changing direction. I made it.

請求項１または請求項２の発明では、可動供給管４と両可撓排出管１０とをトンネル１の長手方向Ｘへ移動させるだけの動作により、覆工コンクリート壁打設型枠２の頂部の所定位置で、型枠２内の打設室３に挿入された両可撓排出管１０の先端排出部１０ｂの位置をトンネル１の周方向Ｒで調節しながら、打設室３の下側から上側へ頂部に向けて順次コンクリートを打設することができる。   In the invention of claim 1 or claim 2, the movable supply pipe 4 and the flexible discharge pipes 10 are moved in the longitudinal direction X of the tunnel 1 to move the top of the lining concrete wall casting form 2. At a predetermined position, the position of the distal end discharge portion 10b of both flexible discharge pipes 10 inserted into the placement chamber 3 in the mold 2 is adjusted in the circumferential direction R of the tunnel 1 from the lower side of the placement chamber 3. Concrete can be placed in sequence toward the top to the upper side.

請求項２の発明を前提とする請求項３の発明において、前記両可撓排出管１０の基端接続部１０ａ側を可動供給管４と共にトンネル１の長手方向Ｘへ移動させた際に、その両可撓排出管１０をトンネル１の長手方向Ｘに沿って案内する長手方向移動用のガイド８ａを型枠２の頂部に配設した。請求項３の発明では、ガイド８ａにより可撓排出管１０をトンネル１の長手方向Ｘに沿って円滑に案内することができる。   In the invention of claim 3 premised on the invention of claim 2, when the proximal end connecting portion 10a side of the flexible discharge pipes 10 is moved in the longitudinal direction X of the tunnel 1 together with the movable supply pipe 4, A guide 8 a for moving in the longitudinal direction for guiding both the flexible discharge pipes 10 along the longitudinal direction X of the tunnel 1 is disposed at the top of the mold 2. In the invention of claim 3, the flexible discharge pipe 10 can be smoothly guided along the longitudinal direction X of the tunnel 1 by the guide 8 a.

請求項２または請求項３の発明を前提とする請求項４の発明において、前記ガイド８ａ，９ａは、トンネル１の長手方向Ｘにおける位置を変更し得るように型枠２の頂部に対し着脱可能に支持されている。請求項４の発明では、各ガイド８ａ，９ａの位置を変更することにより、前記直線状案内通路８及びアール状案内通路９の形成位置をトンネル１の長手方向Ｘで容易に変更することができる。   In the invention of claim 4 based on the invention of claim 2 or claim 3, the guides 8a and 9a can be attached to and detached from the top of the mold 2 so that the position in the longitudinal direction X of the tunnel 1 can be changed. It is supported by. In the invention of claim 4, by changing the positions of the guides 8 a and 9 a, the formation positions of the linear guide passage 8 and the rounded guide passage 9 can be easily changed in the longitudinal direction X of the tunnel 1. .

請求項２または請求項３または請求項４の発明を前提とする請求項５の発明において、前記可動供給管４は、両可撓排出管１０に供給されるコンクリート量を調整する流量調整手段１１を備えている。請求項５の発明では、両可撓排出管１０に供給されるコンクリート量を容易に調整することができる。   In the invention of claim 5 based on claim 2 or claim 3 or claim 4, the movable supply pipe 4 is a flow rate adjusting means 11 for adjusting the amount of concrete supplied to both flexible discharge pipes 10. It has. In the invention of claim 5, the amount of concrete supplied to both flexible discharge pipes 10 can be easily adjusted.

本発明は、特に流動性の高いコンクリートに適した打設方法及び打設装置において、トンネル１内の覆工コンクリート壁の打設を容易に行うことができる。   INDUSTRIAL APPLICABILITY The present invention can easily place a lining concrete wall in a tunnel 1 in a placement method and a placement apparatus suitable for concrete having high fluidity.

本実施形態にかかる覆工コンクリート壁打設装置をトンネル内に設置した状態を正面側から見て概略的に示す部分断面図である。It is a fragmentary sectional view which shows roughly the state which installed the lining concrete wall placement apparatus concerning this embodiment in the tunnel, seeing from the front side. （ａ）は打設開始状態にある上記覆工コンクリート壁打設装置を平面側から見た概略断面図であり、（ｂ）は打設終了状態にある上記覆工コンクリート壁打設装置を平面側から見た概略断面図である。(A) is the schematic sectional drawing which looked at the above-mentioned lining concrete wall casting apparatus in the placement start state from the plane side, (b) It is the schematic sectional drawing seen from the side.

以下、本発明の一実施形態について図１〜２を参照して説明する。
図１に示すようにトンネル１の内周には覆工コンクリート壁打設型枠２がトンネル１の周方向Ｒに沿って頂部から底部まで配設されて図２に示すようにトンネル１の長手方向Ｘへ所定距離だけ延設されている。この覆工コンクリート壁打設型枠２内の打設室３で型枠２の頂部には可動供給管４（金属管）がトンネル１の長手方向Ｘへレール５に沿って移動し得るように各車輪（図示せず）により支持されている。この可動供給管４は、トンネル１の長手方向Ｘへトンネル１の入口側から奥側へ延びる連結管６と、この連結管６の端部に連結されたＹ字管７とを備えている。このＹ字管７は、この連結管６に連結された基管部７ａと、その基管部７ａからトンネル１の長手方向Ｘへ二股状に分岐された分岐管部７ｂとを備えている。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a lining concrete wall casting form 2 is disposed along the circumferential direction R of the tunnel 1 from the top to the bottom along the inner periphery of the tunnel 1 and the length of the tunnel 1 as shown in FIG. A predetermined distance extends in the direction X. A movable supply pipe 4 (metal pipe) can be moved along the rail 5 in the longitudinal direction X of the tunnel 1 at the top of the mold 2 in the casting chamber 3 in the lining concrete wall casting mold 2. It is supported by each wheel (not shown). The movable supply pipe 4 includes a connecting pipe 6 extending from the entrance side to the back side in the longitudinal direction X of the tunnel 1 and a Y-shaped pipe 7 connected to an end of the connecting pipe 6. The Y-shaped tube 7 includes a base tube portion 7 a connected to the connection tube 6, and a branch tube portion 7 b branched from the base tube portion 7 a in the longitudinal direction X of the tunnel 1 in a bifurcated manner.

前記型枠２の頂部において、トンネル１の長手方向Ｘに対し直交するトンネル１の幅方向Ｙの両側には、複数のガイドローラ８ａ（長手方向移動用のガイド）が可動供給管４のＹ字管７の移動範囲である始端側と終端側との間でその長手方向Ｘに沿って直線状案内通路８を形成するように配設されているとともに、複数のガイドローラ９ａ（向き転換用のガイド）が始端側の所定位置でこの各ガイドローラ８ａ間の直線状案内通路８から幅方向Ｙの両側に分岐してアール状案内通路９を形成するように配設されている。この各ガイドローラ８ａ，９ａはトンネル１の長手方向Ｘにおける位置を変更し得るように型枠２の頂部に対しボルトなどの締結具（図示せず）により着脱可能に支持されている。従って、各ガイドローラ８ａ，９ａの位置を変更することにより、前記直線状案内通路８及びアール状案内通路９の形成位置をトンネル１の長手方向Ｘで変更することができる。   A plurality of guide rollers 8 a (guides for moving in the longitudinal direction) are formed on the top of the mold 2 on both sides of the tunnel 1 in the width direction Y perpendicular to the longitudinal direction X of the tunnel 1. A straight guide passage 8 is formed along the longitudinal direction X between the start end side and the end end side, which is the movement range of the tube 7, and a plurality of guide rollers 9a (for turning direction). The guide is branched from the linear guide passage 8 between the guide rollers 8a to both sides in the width direction Y to form a rounded guide passage 9 at a predetermined position on the start end side. Each guide roller 8a, 9a is detachably supported by a fastener (not shown) such as a bolt on the top of the mold 2 so that the position in the longitudinal direction X of the tunnel 1 can be changed. Therefore, by changing the positions of the guide rollers 8 a and 9 a, the formation positions of the linear guide path 8 and the rounded guide path 9 can be changed in the longitudinal direction X of the tunnel 1.

前記Ｙ字管７の両分岐管部７ｂにはそれぞれ可撓排出管１０（例えばゴムホース）が基端接続部１０ａで接続されている。この両可撓排出管１０は共に各ガイドローラ８ａ間の直線状案内通路８で案内され、各ガイドローラ９ａ間の両アール状案内通路９のうち、一方のアール状案内通路９に一方の可撓排出管１０が案内されて型枠２内の打設室３に挿入されるとともに、他方のアール状案内通路９に他方の可撓排出管１０が案内されて型枠２内の打設室３に挿入される。この両可撓排出管１０は分岐管部７ｂに対する基端接続部１０ａから先端排出部１０ｂまで延び、前記可動供給管４の連結管６に供給されたコンクリートが前記Ｙ字管７の基管部７ａ及び両分岐管部７ｂを経て両可撓排出管１０の基端接続部１０ａを通り、両可撓排出管１０の先端排出部１０ｂから排出される。Ｙ字管７の基管部７ａには両可撓排出管１０に供給されるコンクリート量を調整する流量調整手段としての流量調整弁１１が組み込まれている。   A flexible discharge pipe 10 (for example, a rubber hose) is connected to both branch pipe parts 7b of the Y-shaped pipe 7 by a base end connection part 10a. Both the flexible discharge pipes 10 are guided by the linear guide passages 8 between the guide rollers 8a, and one of the round guide passages 9 between the guide rollers 9a is provided in one of the round guide passages 9. The flexible discharge pipe 10 is guided and inserted into the placement chamber 3 in the mold 2, and the other flexible discharge pipe 10 is guided in the other rounded guide passage 9 to be placed in the mold 2. 3 is inserted. These flexible discharge pipes 10 extend from the base end connection part 10a to the front end discharge part 10b with respect to the branch pipe part 7b, and the concrete supplied to the connecting pipe 6 of the movable supply pipe 4 is the base pipe part of the Y-shaped pipe 7. 7a and both branch pipe parts 7b, pass through the base end connection part 10a of both flexible discharge pipes 10, and are discharged from the tip discharge parts 10b of both flexible discharge pipes 10. A flow rate adjusting valve 11 is incorporated in the base tube portion 7a of the Y-shaped tube 7 as flow rate adjusting means for adjusting the amount of concrete supplied to both flexible discharge tubes 10.

図２に示すように前記可動供給管４及び両可撓排出管１０をトンネル１の長手方向Ｘへ移動させる移送手段１２は、トンネル１の入口側に設置されている。この移送手段１２においては、牽引索１３が前記可動供給管４のＹ字管７に連結され、トンネル１の奥側に牽引索１３が巻き取られると、トンネル１の入口側から牽引索１３が引き出され、可動供給管４及び両可撓排出管１０がトンネル１の長手方向Ｘに沿って入口側から離れる向きに移動するとともに、トンネル１の入口側に牽引索１３が巻き取られると、トンネル１の奥側から牽引索１３が引き出され、可動供給管４及び両可撓排出管１０がトンネル１の長手方向Ｘに沿って入口側に接近する向きに移動する。   As shown in FIG. 2, the transfer means 12 for moving the movable supply pipe 4 and both flexible discharge pipes 10 in the longitudinal direction X of the tunnel 1 is installed on the entrance side of the tunnel 1. In this transfer means 12, the tow rope 13 is connected to the Y-shaped pipe 7 of the movable supply pipe 4, and when the tow rope 13 is wound up on the back side of the tunnel 1, the tow rope 13 is moved from the entrance side of the tunnel 1. When the movable supply pipe 4 and both flexible discharge pipes 10 are pulled out and move away from the entrance side along the longitudinal direction X of the tunnel 1 and the tow rope 13 is wound up on the entrance side of the tunnel 1, The tow rope 13 is pulled out from the back side of 1, and the movable supply pipe 4 and both flexible discharge pipes 10 move along the longitudinal direction X of the tunnel 1 in a direction approaching the entrance side.

図２（ａ）に示すように１回目の打設開始状態では、トンネル１の奥側に牽引索１３が巻き取られているため、可動供給管４がトンネル１の奥側に最接近する。その奥側の所定位置でアール状案内通路９に案内されて打設室３挿入された両可撓排出管１０の先端排出部１０ｂは、打設室３の最下にある１回目の打設範囲の上方に位置している。１回目の打設開始状態で可動供給管４の連結管６に供給されたコンクリートは、両可撓排出管１０の先端排出部１０ｂから打設室３に排出される。流動性の高いコンクリートであるため、コンクリートが打設室３の長手方向Ｘの全体に広がる。   As shown in FIG. 2A, in the first driving start state, the tow rope 13 is wound up on the back side of the tunnel 1, so that the movable supply pipe 4 comes closest to the back side of the tunnel 1. The leading end discharge portion 10b of both flexible discharge pipes 10 inserted into the placement chamber 3 while being guided by the rounded guide passage 9 at a predetermined position on the back side is the first placement at the bottom of the placement chamber 3. Located above the range. The concrete supplied to the connecting pipe 6 of the movable supply pipe 4 in the first start-up state is discharged from the tip discharge portion 10b of both flexible discharge pipes 10 to the placement chamber 3. Since the concrete is highly fluid, the concrete spreads in the entire longitudinal direction X of the placement chamber 3.

１回目の打設が終了した後に、トンネル１の入口側に牽引索１３が巻き取られると、可動供給管４及び両可撓排出管１０がトンネル１の奥側から離れる向きに移動するとともに、両可撓排出管１０の先端排出部１０ｂも打設室３でトンネル１の周方向Ｒに沿って上方へ移動し、２回目の打設開始状態となる。２回目の打設開始状態でコンクリートの打設が同様に行われると、流動性の高いコンクリートは、打設室３の長手方向Ｘの全体に広がり、１回目に打設されたコンクリート上に積み重ねられる。   When the towing line 13 is wound up on the entrance side of the tunnel 1 after the first driving is completed, the movable supply pipe 4 and both flexible discharge pipes 10 move away from the back side of the tunnel 1, The distal end discharge portions 10b of the flexible discharge pipes 10 also move upward along the circumferential direction R of the tunnel 1 in the placement chamber 3 and enter a second placement start state. When concrete is placed in the same manner in the start of the second placement, the highly fluid concrete spreads in the entire longitudinal direction X of the placement chamber 3 and is stacked on the concrete placed in the first placement. It is done.

このようにしてコンクリートの打設が複数回繰り返されると、図２（ｂ）に示すように可動供給管４がトンネル１の入口側に最接近するとともに両可撓排出管１０の先端排出部１０ｂが打設室３でトンネル１の周方向Ｒに沿って最上へ移動する打設終了状態までに、流動性の高いコンクリートは、各回毎に、打設されたコンクリート上に順次積み重ねられる。なお、打設室３の頂部に対する打設は、可動供給管４や両可撓排出管１０などを取り外して、別の装置により行う。ちなみに、型枠２の検査窓からロープを通して可撓排出管１０に連結し、そのロープにより可撓排出管１０の先端排出部１０ｂを長手方向Ｘへ移動させれば、流動性の高いコンクリートに限らず、通常のコンクリートも打設時に締め固めることができる。   When the concrete placement is repeated a plurality of times in this way, the movable supply pipe 4 comes closest to the entrance side of the tunnel 1 as shown in FIG. The concrete having high fluidity is sequentially stacked on the cast concrete every time until the casting finish state in which it moves to the top along the circumferential direction R of the tunnel 1 in the casting chamber 3. In addition, the placement with respect to the top of the placement chamber 3 is performed by another apparatus with the movable supply pipe 4 and both flexible discharge pipes 10 removed. By the way, if it is connected to the flexible discharge pipe 10 through the rope from the inspection window of the mold 2 and the tip discharge portion 10b of the flexible discharge pipe 10 is moved in the longitudinal direction X by the rope, it is limited to high fluidity concrete. Ordinary concrete can be compacted at the time of placing.

本実施形態は下記の効果を有する。
（１） 牽引索１３の巻取りにより、可動供給管４と両可撓排出管１０とをトンネル１の長手方向Ｘへ移動させるだけの動作により、覆工コンクリート壁打設型枠２の頂部の所定位置で、型枠２内の打設室３に挿入された両可撓排出管１０の先端排出部１０ｂの位置をトンネル１の周方向Ｒで調節しながら、打設室３の下側から上側へ頂部に向けて順次コンクリートを打設することができる。特に、流動性の高いコンクリートを打設する際には、コンクリートが打設室３の長手方向Ｘの全体に広がるため、両可撓排出管１０の先端排出部１０ｂの位置を順次高くしながらその先端排出部１０ｂからコンクリートを連続して排出させることができる。また、両可撓排出管１０の先端排出部１０ｂを適正な高さに容易に設定することができ、コンクリートの落下高さを低くしてコンクリートの成分の分離やコンクリートへの気泡の混入を防止したり、コンクリートをトンネル１の長手方向Ｘへ一連に積層してコンクリートの流れによる流れ縞の発生を防止したりすることが容易になる。従って、特に流動性の高いコンクリートを利用してトンネル１内の覆工コンクリート壁の打設を容易に行うことができるとともに、覆工コンクリート壁の品質を向上させることができる。 This embodiment has the following effects.
(1) By winding the tow rope 13 and moving the movable supply pipe 4 and both flexible discharge pipes 10 in the longitudinal direction X of the tunnel 1, the top of the lining concrete wall casting form 2 is moved. At a predetermined position, the position of the distal end discharge portion 10b of both flexible discharge pipes 10 inserted into the placement chamber 3 in the mold 2 is adjusted in the circumferential direction R of the tunnel 1 from the lower side of the placement chamber 3. Concrete can be placed in sequence toward the top to the upper side. In particular, when placing concrete with high fluidity, since the concrete spreads in the entire longitudinal direction X of the placing chamber 3, the position of the distal end discharge portion 10b of both the flexible discharge pipes 10 is increased in order. Concrete can be continuously discharged from the tip discharge portion 10b. Moreover, the tip discharge part 10b of both the flexible discharge pipes 10 can be easily set to an appropriate height, and the fall height of the concrete is lowered to prevent separation of the components of the concrete and mixing of bubbles into the concrete. It is easy to stack concrete in the longitudinal direction X of the tunnel 1 and prevent the occurrence of flow streaks due to the flow of concrete. Therefore, it is possible to easily place the lining concrete wall in the tunnel 1 using concrete having particularly high fluidity and to improve the quality of the lining concrete wall.

（２） 両可撓排出管１０の基端接続部１０ａ側を可動供給管４と共にトンネル１の長手方向Ｘへ移動させた際に、向き転換用のガイドローラ９ａにより、覆工コンクリート壁打設型枠２の頂部の所定位置で可撓排出管１０を打設室３に挿入した状態を維持することができる。   (2) When the proximal end connecting part 10a side of both flexible discharge pipes 10 is moved in the longitudinal direction X of the tunnel 1 together with the movable supply pipe 4, the lining concrete wall is cast by the guide roller 9a for changing the direction. The state where the flexible discharge pipe 10 is inserted into the placement chamber 3 can be maintained at a predetermined position on the top of the mold 2.

（３） 両可撓排出管１０の基端接続部１０ａ側を可動供給管４と共にトンネル１の長手方向Ｘへ移動させた際に、長手方向移動用のガイドローラ８ａにより、可撓排出管１０をトンネル１の長手方向Ｘに沿って円滑に案内することができる。   (3) When the proximal end connecting portion 10a side of both flexible discharge pipes 10 is moved in the longitudinal direction X of the tunnel 1 together with the movable supply pipe 4, the flexible discharge pipe 10 is moved by the guide roller 8a for moving in the longitudinal direction. Can be smoothly guided along the longitudinal direction X of the tunnel 1.

（４） 向き転換用のガイドローラ９ａや長手方向移動用のガイドローラ８ａは、トンネル１の長手方向Ｘにおける位置を変更し得るように型枠２の頂部に対し着脱可能に支持されているので、直線状案内通路８及びアール状案内通路９の形成位置をトンネル１の長手方向Ｘで変更することができる。従って、打設室３に可撓排出管１０を挿入する位置を各種打設条件に応じて容易に変更することができる。   (4) The guide roller 9a for changing direction and the guide roller 8a for moving in the longitudinal direction are detachably supported with respect to the top of the mold 2 so that the position in the longitudinal direction X of the tunnel 1 can be changed. The formation positions of the linear guide passage 8 and the round guide passage 9 can be changed in the longitudinal direction X of the tunnel 1. Therefore, the position where the flexible discharge pipe 10 is inserted into the placement chamber 3 can be easily changed according to various placement conditions.

（５） 可動供給管４のＹ字管７に設けた流量調整弁１１により、両可撓排出管１０に供給されるコンクリート量を容易に調整することができる。   (5) The amount of concrete supplied to both flexible discharge pipes 10 can be easily adjusted by the flow rate adjusting valve 11 provided in the Y-shaped pipe 7 of the movable supply pipe 4.

１…トンネル、２…覆工コンクリート壁打設型枠、３…打設室、４…可動供給管、８ａ…長手方向移動用のガイドローラ（ガイド）、９ａ…向き転換用のガイドローラ（ガイド）、１０…可撓排出管、１０ａ…可撓排出管の基端接続部、１０ｂ…可撓排出管の先端排出部、１１…流量調整弁（流量調整手段）、１２…移送手段、Ｘ…トンネルの長手方向、Ｙ…トンネルの幅方向、Ｒ…トンネルの周方向。   DESCRIPTION OF SYMBOLS 1 ... Tunnel, 2 ... Covering concrete wall casting form, 3 ... Placing chamber, 4 ... Movable supply pipe, 8a ... Guide roller (guide) for longitudinal movement, 9a ... Guide roller (guide) for direction change 10) Flexible discharge pipe, 10a ... Flexible discharge pipe proximal end connection part, 10b ... Flexible discharge pipe distal end discharge part, 11 ... Flow rate adjusting valve (flow rate adjusting means), 12 ... Transfer means, X ... The longitudinal direction of the tunnel, Y: the width direction of the tunnel, R: the circumferential direction of the tunnel.

Claims (5)

トンネル内に配設される覆工コンクリート壁打設型枠の頂部の所定位置において、トンネルの長手方向に対し直交するトンネルの幅方向の両側で可動供給管に接続されて向き転換用のガイドを介して型枠内の打設室に挿入された可撓排出管の基端接続部側を可動供給管と共にトンネルの長手方向へ移送手段により移動させた際に、向き転換用のガイドを介して型枠内の打設室に挿入された両可撓排出管の先端排出部の位置をトンネルの周方向で調節しながら、この可動供給管に供給されたコンクリートをこの可撓排出管の先端排出部から型枠内の打設室に排出して、その打設室の下側から上側へ型枠の頂部に向けて順次、コンクリートを打設することを特徴とするトンネル内の覆工コンクリート壁打設方法。   At predetermined positions on the top of the lining concrete wall casting formwork placed in the tunnel, guides for turning are connected to the movable supply pipes on both sides in the width direction of the tunnel perpendicular to the longitudinal direction of the tunnel. When the proximal end connecting portion side of the flexible discharge pipe inserted into the placement chamber in the mold is moved along with the movable supply pipe in the longitudinal direction of the tunnel by the transfer means, While adjusting the position of the tip discharge part of both flexible discharge pipes inserted in the casting chamber in the mold in the circumferential direction of the tunnel, the concrete supplied to this movable supply pipe is discharged at the tip of this flexible discharge pipe. A concrete lining in a tunnel characterized in that the concrete is poured from the lower part into the casting room in the mold, and the concrete is sequentially cast from the lower side to the upper side of the casting room toward the top of the mold. Placement method. トンネル内に配設される覆工コンクリート壁打設型枠の頂部に可動供給管をトンネルの長手方向へ移送手段により移動可能に設け、この可動供給管には型枠の頂部の所定位置でトンネルの長手方向に対し直交するトンネルの幅方向の両側に配設した向き転換用のガイドを介して型枠内の打設室に挿入される可撓排出管を接続し、その可動供給管に接続された両可撓排出管の基端接続部側を可動供給管と共にトンネルの長手方向へ移送手段により移動させた際に、型枠の頂部の所定位置で、向き転換用のガイドを介して型枠内の打設室に挿入された両可撓排出管の先端排出部の位置をトンネルの周方向で調節可能にしたことを特徴とするトンネル内の覆工コンクリート壁打設装置。   A movable supply pipe is provided at the top of the lining concrete wall casting formwork disposed in the tunnel so as to be movable in the longitudinal direction of the tunnel by a transfer means. The movable supply pipe is tunneled at a predetermined position on the top of the formwork. Connected to the movable supply pipe by connecting a flexible discharge pipe inserted into the casting chamber in the mold through guides for turning disposed on both sides of the tunnel in the width direction perpendicular to the longitudinal direction When the proximal end connection side of both the flexible discharge pipes is moved together with the movable supply pipe by the transfer means in the longitudinal direction of the tunnel, the mold is inserted at a predetermined position on the top of the mold frame via a turn guide. A lining concrete wall placing device in a tunnel, characterized in that the position of the tip discharge portion of both flexible discharge pipes inserted into the placement chamber in the frame can be adjusted in the circumferential direction of the tunnel. 前記両可撓排出管の基端接続部側を可動供給管と共にトンネルの長手方向へ移動させた際に、その両可撓排出管をトンネルの長手方向に沿って案内する長手方向移動用のガイドを型枠の頂部に配設したことを特徴とする請求項２に記載のトンネル内の覆工コンクリート壁打設装置。   Longitudinal movement guide for guiding both flexible discharge pipes along the longitudinal direction of the tunnel when the proximal end connecting portions of the flexible discharge pipes are moved in the longitudinal direction of the tunnel together with the movable supply pipe. The lining concrete wall placing device in a tunnel according to claim 2, wherein the lining concrete wall is placed at the top of the formwork. 前記ガイドは、トンネルの長手方向における位置を変更し得るように型枠の頂部に対し着脱可能に支持されていることを特徴とする請求項２または請求項３に記載のトンネル内の覆工コンクリート壁打設装置。   4. The lining concrete in a tunnel according to claim 2, wherein the guide is detachably supported with respect to the top of the mold so that the position in the longitudinal direction of the tunnel can be changed. Wall placing device. 前記可動供給管は、両可撓排出管に供給されるコンクリート量を調整する流量調整手段を備えていることを特徴とする請求項２または請求項３または請求項４に記載のトンネル内の覆工コンクリート壁打設装置。   5. The covering in a tunnel according to claim 2, wherein the movable supply pipe is provided with a flow rate adjusting means for adjusting the amount of concrete supplied to both flexible discharge pipes. Concrete wall placement equipment.
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CN105673049A (en) * 2016-03-17 2016-06-15 福州大学 Device and method for model test of horizontal tunnel by simulating lining wall back cavity
CN110514518A (en) * 2019-07-19 2019-11-29 同济大学 Tunnel lining structure military service method for testing performance based on tunnel-liner Disease Characters
CN117780391A (en) * 2024-02-26 2024-03-29 洛阳腾誉隧道机械有限公司 Tunnel lining trolley

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