JP2018178452A - Connection structure and connection method of steel support - Google Patents

Connection structure and connection method of steel support Download PDF

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JP2018178452A
JP2018178452A JP2017077182A JP2017077182A JP2018178452A JP 2018178452 A JP2018178452 A JP 2018178452A JP 2017077182 A JP2017077182 A JP 2017077182A JP 2017077182 A JP2017077182 A JP 2017077182A JP 2018178452 A JP2018178452 A JP 2018178452A
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joint plate
male
female
steel support
locking
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JP6874267B2 (en
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和彦 水谷
Kazuhiko Mizutani
和彦 水谷
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Maeda Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a technique relating to a steel support connection structure that can avoid manual work and improve safety and workability in tunnel face operation.SOLUTION: A steel support connection structure connects crown parts of a pair of steel supports, which are split in arc shape and erected along a tunnel pit wall, to each other. The steel support connection structure comprises: a male joint plate that is disposed at a crown part of one steel support and has a male connection part; and a female joint plate, which are disposed at a crown part of the other steel support and has a female connection part. The male connection part is locked to the female connection part by relatively sliding the male joint plate and the female joint plate in horizontal width direction of butting faces so that butting faces of the male joint plate and the female joint plate butt against each other.SELECTED DRAWING: Figure 2

Description

本発明は、鋼製支保工の連結構造、及び鋼製支保工の連結方法に関する。   The present invention relates to a steel support connection structure and a steel support connection method.

トンネルを構築する工法として、ＮＡＴＭ工法(New Austrian Tunneling Method)が知
られている。ＮＡＴＭ工法は、地山が有する支保能力、強度を有効に利用してトンネルの安定を保つという考え方のもとに、吹付けコンクリート、ロックボルト、鋼製支保工を適宜に用いて、地山と一体化したトンネル構造物を建設する工法である。 The New Austrian Tunneling Method is known as a method of constructing a tunnel. The NATM method appropriately uses the shotcrete, rock bolt, and steel support under the concept of maintaining the stability of the tunnel by effectively using the support capacity and strength possessed by the ground, using the ground support and the steel support as appropriate. It is a construction method to construct an integrated tunnel structure.

ＮＡＴＭ工法においてトンネルを構築する際に、アーチ状の鋼製支保工を設置する場合、通常、以下に説明する手順により行われている。まず、切羽の近傍に吹付け機をセットして、切羽にコンクリートを一次吹き付けし、これが完了すると、吹付け機を退出させる。次いで、切羽近傍に支保工を建て込むエレクタを備えた作業車を配置し、エレクタによりアーチ状の鋼製支保工を切羽近傍のトンネル坑壁に建て込み、これが完了すると作業車を退出させる。次に、切羽に吹付け機を再び配置し、建て込まれたトンネル支保工を埋め込むようにして、コンクリートの二次吹付けを行い、吹付け機を退出させる。   When constructing a tunnel in the NATM method, the installation of an arch-shaped steel support is usually performed according to the procedure described below. First, a sprayer is set near the face, and the face is sprayed primarily with concrete, and when this is complete, the sprayer is withdrawn. Next, a working vehicle provided with an elector for erecting a support near the face is arranged, and an arched steel support is erected by the erector on the tunnel pit wall near the face, and when this is completed, the working vehicle is withdrawn. Next, the sprayer is re-placed on the face, and the built-in tunnel support is embedded, and a secondary spray of concrete is performed to withdraw the sprayer.

鋼製支保工の建て込みに際しては、主にエレクタ装置やドリルジャンボ等といった重機のブーム先端で左右の鋼製支保工を把持して建て込み作業を行った後、左右の鋼製支保工の天端に設けられている継手板同士を突き合わせてボルト接合をすることでアーチ状に建て込む方法が一般的である。   When building a steel support, after holding the steel support left and right with the boom tip of a heavy machine such as an Electa device or a drill jumbo and carrying out the building work, the ceiling of the steel support left and right Generally, a method of erecting in an arch-like manner by butt-joining joint plates provided at the ends and bolting them together is common.

特許第３３８１６０６号公報Patent No. 3381606

しかしながら、従来の鋼製支保工の連結構造によれば、左右の鋼製支保工に設けられた継手板同士を当接させた状態で、トンネル坑壁付近に組まれた作業足場や重機のブームに設けられたマンケージ等に人員を配置して、トンネル天端付近まで人員を移動させ、その天端付近に位置する鋼製支保工の継手板同士にボルトを挿通し、かかるボルトをナットにて締結するといった連結作業を行う必要があった。   However, according to the connection structure of the conventional steel support, the boom of the work scaffolding and heavy machinery assembled near the tunnel pit wall in a state where the joint plates provided on the left and right steel supports are in contact with each other. Arrange the personnel in the mancage and so on provided in and move the personnel to the vicinity of the tunnel top end, insert the bolt into the joint plates of the steel support located near the top end and use the bolt with the nut It was necessary to carry out consolidation work such as fastening.

本発明は、上記のような問題点に鑑みてなされたものであって、その目的は、トンネルの切羽における人手作業を回避し、安全性および作業性を向上することができる鋼製支保工の連結構造に関する技術を提供することにある。   The present invention has been made in view of the problems as described above, and its object is to avoid the manual work on the face of the tunnel and to improve the safety and workability of the steel support construction. It is about providing the technology about connection structure.

本発明は、トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結するための鋼製支保工の連結構造において、一方の鋼製支保工の天端部に設けられる雄型継手板と他方の鋼製支保工の天端部に設けられる雌型継手板の当接面同士を当接させた状態で当該当接面の横幅方向に相対スライドした際に雌型継手板の雌型連結部に雄型継手板の雄型連結部が係止される構造を採用した。   The present invention relates to a connection structure of steel supports for connecting a pair of arc-shaped divided steel supports erected along a tunnel pit wall to each other at their top ends. Abutment surfaces of a male joint plate provided at the top end of a steel support and a female joint plate provided at the top end of the other steel support are in contact with each other. A structure was adopted in which the male connection portion of the male joint plate is locked to the female connection portion of the female joint plate when sliding relative to each other in the width direction.

より詳しくは、本発明は、トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結するための鋼製支保工の連結構造であ
って、一方の前記鋼製支保工の天端部に設けられると共に雄型連結部を有する雄型継手板と、他方の前記鋼製支保工の天端部に設けられると共に雌型連結部を有する雌型継手板と、を備え、前記雄型継手板及び前記雌型継手板の当接面同士が当接した状態で当該当接面の横幅方向に相対スライドすることで、前記雌型連結部に前記雄型連結部が係止される。 More specifically, the present invention relates to a steel support connection structure for connecting a pair of arc-shaped divided steel supports erected along a tunnel pit wall to each other at their top ends. A male joint plate provided at the top end of one of the steel supports and having a male connection portion, and provided at the other end of the steel support at the top end and a female connection portion A female type joint plate having the above-mentioned type, and in the state where the contact surfaces of the male type joint plate and the female type joint plate are in contact with each other, the female type relative slide in the lateral width direction of the contact surface. The male coupling portion is locked to the coupling portion.

ここで、前記雄型連結部は、前記雄型継手板の前記当接面から垂直に立設すると共に当該当接面の横幅方向に沿って延在する挿通壁部と、前記挿通壁部における前記当接面との接続端と反対側の端部に連設されると共に、前記当接面の高さ方向に沿った幅寸法が前記挿通壁部の壁厚よりも大きな係止頭部と、を含み、前記雌型連結部は、前記雌型継手板における一方の側縁に開口すると共に前記当接面の横幅方向に沿って延在すると共に前記雌型継手板を厚さ方向に貫通する係止溝孔を含み、前記係止溝孔の溝幅は、前記挿通壁部の壁厚よりも大きく且つ前記係止頭部の幅寸法よりも小さく、前記係止溝孔に前記挿通壁部を挿通させつつ前記雌型継手板における前記係止溝孔の縁部に前記係止頭部を係止可能であっても良い。   Here, in the insertion wall portion, the male connection portion vertically extends from the contact surface of the male joint plate and extends along the lateral width direction of the contact surface; A locking head which is continuous with the end opposite to the connection end with the contact surface and whose width in the height direction of the contact surface is larger than the wall thickness of the insertion wall; And the female connection portion is open at one side edge of the female joint plate and extends along the lateral width direction of the abutment surface and penetrates the female joint plate in the thickness direction. And the width of the locking groove is larger than the wall thickness of the insertion wall and smaller than the width of the locking head, and the insertion wall is inserted into the locking groove. The locking head may be able to be locked at the edge of the locking groove in the female joint plate while inserting a part.

また、前記雄型連結部は、前記雄型継手板における上縁及び下縁によって形成され、前記雌型連結部は、前記雌型継手板における上縁及び下縁にそれぞれ設けられると共に当該上縁及び下縁に沿って延在する一対の係止枠部を含み、前記一対の係止枠部は、前記雌型継手板の前記当接面から垂直に立設すると共に当該当接面の横幅方向に沿って延在する外壁部と、前記外壁部における前記当接面との接続端と反対側の端部から直交方向に折れ曲って形成された係止壁部と、を有し、前記係止壁部は、前記当接面との間に形成される内空部に前記雄型連結部を収容することで前記雄型連結部を係止可能であっても良い。   Also, the male connection portion is formed by the upper edge and the lower edge of the male joint plate, and the female connection portion is provided on the upper edge and the lower edge of the female joint plate respectively and the upper edge And a pair of locking frames extending along the lower edge, the pair of locking frames standing vertically from the contact surface of the female joint plate and having a lateral width of the contact surface An outer wall portion extending along a direction, and a locking wall portion formed by bending in an orthogonal direction from an end portion of the outer wall portion opposite to a connection end with the contact surface, The locking wall may be capable of locking the male connection by accommodating the male connection in an inner space formed between the locking wall and the contact surface.

また、前記雄型連結部は、前記雄型天端継手板の前記当接面から垂直に立設する棒状の挿通軸部と、前記挿通壁部における前記当接面との接続端と反対側の端部に連設されると共に、前記当接面の高さ方向に沿った幅寸法が前記挿通軸部よりも大きな係止頭部と、を含み、前記雌型連結部は、前記雌型継手板を厚さ方向に貫通すると共に前記係止頭部を挿入可能な頭部挿入口と、前記頭部挿入口と連通すると共に前記当接面の横幅方向に沿って延在し、且つ前記雌型継手板を厚さ方向に貫通する係止溝孔と、を含み、前記係止溝孔の溝幅は、前記挿通軸部の軸幅よりも大きく且つ前記係止頭部の幅寸法よりも小さく、前記係止溝孔に前記挿通軸部を挿通させつつ前記雌型継手板における前記係止溝孔の縁部に前記係止頭部を係止可能であっても良い。   Further, the male connection portion is a side opposite to a connection end of a rod-like insertion shaft portion vertically erected from the contact surface of the male top end joint plate and the contact surface of the insertion wall portion. And a locking head having a width dimension along the height direction of the contact surface larger than the insertion shaft, and the female connection portion includes the female mold A head insertion port which penetrates the joint plate in the thickness direction and can insert the locking head, communicates with the head insertion port and extends along the lateral width direction of the contact surface, and And a locking groove penetrating the female joint plate in a thickness direction, and a groove width of the locking groove is larger than an axial width of the insertion shaft portion and a width dimension of the locking head. The locking head can be locked to the edge of the locking groove in the female joint plate while inserting the insertion shaft into the locking groove. Good.

また、本発明は、鋼製支保工の連結方法として特定することもできる。すなわち、本発明は、トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結する鋼製支保工の連結方法であって、一方の前記鋼製支保工の天端部に、雄型連結部を有する雄型継手板が設けられ、他方の前記鋼製支保工の天端部に、雌型連結部を有する雄型継手板が設けられ、前記鋼製支保工の連結方法は、前記雄型継手板及び前記雌型継手板の当接面同士が当接した状態で当該当接面の横幅方向に相対スライドすることで、前記雌型連結部に前記雄型連結部が係止される。   Moreover, this invention can also be specified as a connection method of steel supports. That is, the present invention is a method of connecting steel supports, in which a pair of arc-shaped divided steel supports erected along a tunnel pit wall are mutually connected at their top ends, A male joint plate having a male connection portion is provided at the top end of one of the steel supports, and a male joint plate having a female connection portion at the top end of the other steel support. The connection method of the steel support is relative sliding in the lateral width direction of the contact surface while the contact surfaces of the male joint plate and the female joint plate abut each other, The male connection portion is engaged with the female connection portion.

本発明によれば、トンネルの切羽における人手作業を回避し、安全性および作業性を向上することができる鋼製支保工の連結構造に関する技術を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the technique regarding the connection structure of steel supports which can avoid the manual work in the face of a tunnel, and can improve safety | security and workability can be provided.

図１は、実施形態１に係るトンネル支保工の側面図である。FIG. 1 is a side view of the tunnel support according to the first embodiment. 図２は、実施形態１に係る左側鋼製支保工及び右側鋼製支保工の連結構造を説明する図である。FIG. 2 is a view for explaining the connection structure of the left steel support and the right steel support according to the first embodiment. 図３は、実施形態１に係る雌型継手板を示す図である。（ａ）に、図２におけるＡ矢視図を示す。（ｂ）に、（ａ）におけるＢ−Ｂ矢視断面図を示す。FIG. 3 is a view showing the female joint plate according to the first embodiment. (A) shows a view on arrow A in FIG. (B) shows a cross-sectional view taken along line B-B in (a). 図４は、実施形態１に係る雄型継手板を示す図である。（ａ）に、図２におけるＣ矢視図を示す。（ｂ）に、（ａ）におけるＤ−Ｄ矢視断面図を示す。FIG. 4 is a view showing a male joint plate according to the first embodiment. (A) shows a view in the direction of the arrow C in FIG. (B) shows a cross-sectional view taken along the line DD in (a). 図５は、実施形態１に係る左側鋼製支保工及び右側鋼製支保工を連結する直前の雌型継手板及び雄型継手板の位置関係を説明する図である。FIG. 5 is a view for explaining the positional relationship between the female joint plate and the male joint plate immediately before connecting the left steel support and the right steel support according to the first embodiment. 図６は、エレクタ装置を搭載する作業車の上面図である。FIG. 6 is a top view of a working vehicle equipped with the elector device. 図７は、実施形態１に係る左側鋼製支保工及び右側鋼製支保工を連結している途中の状況を示す図である。FIG. 7 is a view showing a state in the middle of connecting the left steel support and the right steel support according to the first embodiment. 図８は、実施形態１に係る左側鋼製支保工及び右側鋼製支保工の連結が完了した状態を示す図である。FIG. 8 is a view showing a state in which the connection of the left steel support and the right steel support according to the first embodiment is completed. 図９は、実施形態１に係る左側鋼製支保工及び右側鋼製支保工の連結が完了した状態を示す図である。FIG. 9 is a view showing a state in which coupling of the left steel support and the right steel support according to the first embodiment is completed. 図１０は、実施形態２に係る左側鋼製支保工及び右側鋼製支保工の連結構造を説明する図である。FIG. 10 is a view for explaining the connection structure of the left steel support and the right steel support according to the second embodiment. 図１１は、実施形態２に係る雌型継手板を示す図である。（ａ）に、図１０におけるＥ矢視図を示す。（ｂ）に、（ａ）におけるＦ−Ｆ矢視断面図を示す。FIG. 11 is a view showing a female joint plate according to a second embodiment. (A) shows a view on arrow E in FIG. (B) shows an F-F arrow sectional view in (a). 図１２は、実施形態２に係る雄型継手板を示す図である。（ａ）に、図１０におけるＧ矢視図を示す。（ｂ）に、（ａ）におけるＨ−Ｈ矢視断面図を示す。FIG. 12 is a view showing a male joint plate according to a second embodiment. (A) shows a view on arrow G in FIG. (B) shows the H-H arrow sectional view in (a). 図１３は、実施形態３に係る左側鋼製支保工及び右側鋼製支保工の連結構造を説明する図である。FIG. 13 is a view for explaining the connection structure of the left steel support and the right steel support according to the third embodiment. 図１４は、実施形態３に係る雌型継手板を示す図である。（ａ）に、図１３におけるＩ矢視図を示す。（ｂ）に、（ａ）におけるＪ−Ｊ矢視断面図を示す。FIG. 14 is a view showing a female joint plate according to a third embodiment. (A) shows a view on arrow I in FIG. (B) shows a JJ arrow sectional view in (a). 図１５は、実施形態３に係る雄型継手板を示す図である。（ａ）に、図１４におけるＫ矢視図を示す。（ｂ）に、（ａ）におけるＬ−Ｌ矢視断面図を示す。FIG. 15 is a view showing a male joint plate according to a third embodiment. (A) shows a view on arrow K in FIG. (B) shows an L-L arrow sectional view in (a). 図１６は、実施形態３に係る鋼製支保工の連結方法を説明する図である。FIG. 16 is a view for explaining the method of connecting steel supports according to the third embodiment.

以下、本発明の実施形態について、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

＜実施形態１＞
図１は、実施形態１に係るトンネル支保工１０の側面図である。トンネル支保工１０は、トンネル掘削に伴い露出する地山の崩落防止のために、掘削直後の坑壁に沿って建て込まれるアーチ状の鋼製支保工であり、トンネル軸方向に沿って一定間隔毎に設置される。本実施形態におけるトンネル支保工１０は、Ｈ形断面を有するＨ形鋼によって形成されている。より詳しくは、トンネル支保工１０は、一対の円弧状の鋼製支保工１０Ｌ，１０Ｒの天端部（上端部）同士を一体に連結することでアーチ状に形成されている。以下、鋼製支保工１０Ｌを「左側鋼製支保工」と呼び、鋼製支保工１０Ｒを「右側鋼製支保工」と呼ぶ。 First Embodiment
FIG. 1 is a side view of the tunnel support 10 according to the first embodiment. The tunnel support 10 is an arched steel support erected along a pit wall immediately after excavation for preventing collapse of the ground that is exposed during tunnel excavation, and has a fixed distance along the tunnel axial direction. It is installed every time. The tunnel support 10 in the present embodiment is formed of an H-shaped steel having an H-shaped cross section. More specifically, the tunnel support 10 is formed in an arch shape by integrally connecting the top ends (upper ends) of the pair of arc-shaped steel supports 10L and 10R. Hereinafter, the steel support 10L is referred to as "left side steel support", and the steel support 10R is referred to as "right side steel support".

左側鋼製支保工１０Ｌは、第１本体部１１１、雌型継手板１２１、第１底板１３１を有する。第１本体部１１１は、ウェブ１１１ａ、当該ウェブ１１１ａに直交する一対の地山側フランジ１１１ｂ及び内空側フランジ１１１ｃから構成されるＨ形鋼である。また、第１本体部１１１における一端には雌型継手板１２１が溶接され、他端には第１底板１３１が溶接されている。雌型継手板１２１及び第１底板１３１は四角形の鋼製平板であり、第１本体部１１１のＨ形断面に対して直交方向に延在している。   The left steel support 10L includes a first main body 111, a female joint plate 121, and a first bottom plate 131. The first main body portion 111 is an H-shaped steel composed of a web 111a, a pair of land-side flanges 111b orthogonal to the web 111a, and an inner air-side flange 111c. Further, a female joint plate 121 is welded to one end of the first main body portion 111, and a first bottom plate 131 is welded to the other end. The female joint plate 121 and the first bottom plate 131 are square steel flat plates and extend in a direction orthogonal to the H-shaped cross section of the first main body portion 111.

右側鋼製支保工１０Ｒについても同様に、第２本体部１１２、雄型継手板１２２、第２底板１３２を有する。第２本体部１１２は、ウェブ１１２ａ、当該ウェブ１１２ａに直交する一対の地山側フランジ１１２ｂ及び内空側フランジ１１２ｃから構成されるＨ形鋼である。また、第２本体部１１２における一端には雄型継手板１２２が溶接され、他端には
第２底板１３２が溶接されている。雄型継手板１２２、第２底板１３２は四角形の鋼製平板であり、第２本体部１１２のＨ形断面に対して直交方向に延在している。本実施形態では、雌型継手板１２１及び雄型継手板１２２は合同の矩形平面を有している。図１に示すように、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒは、雌型継手板１２１及び雄型継手板１２２が互いに突き合わされた状態で連結されている。また、雌型継手板１２１及び雄型継手板１２２は、大きさ及び形状が同一であり、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒが連結された状態において、雌型継手板１２１及び雄型継手板１２２の当接面同士がちょうど重ね合せられた状態で当接している。 Similarly, the right steel support 10R has a second main body 112, a male joint plate 122, and a second bottom plate 132. The second main body portion 112 is an H-shaped steel composed of a web 112a, a pair of ground-side flanges 112b orthogonal to the web 112a, and an inner air-side flange 112c. Further, a male joint plate 122 is welded to one end of the second main body portion 112, and a second bottom plate 132 is welded to the other end. The male joint plate 122 and the second bottom plate 132 are square steel flat plates and extend in a direction perpendicular to the H-shaped cross section of the second main body 112. In the present embodiment, the female joint plate 121 and the male joint plate 122 have a congruent rectangular plane. As shown in FIG. 1, the left steel support 10L and the right steel support 10R are connected in a state in which the female joint plate 121 and the male joint plate 122 are butted to each other. The female joint plate 121 and the male joint plate 122 have the same size and shape, and the female joint plate 121 and the right steel support 10R are connected to each other. The abutting surfaces of the male joint plate 122 abut each other in a state where they are just superimposed.

以下、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造について説明する。図２は、実施形態１に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造を説明する図である。図２には、左側鋼製支保工１０Ｌにおける雌型継手板１２１及びその周辺構造と、右側鋼製支保工１０Ｒにおける雄型継手板１２２及びその周辺構造を概略的に示している。図２に示すように、雌型継手板１２１には、一対の雌型連結部４０ａ，４０ｂが設けられている。また、雄型継手板１２２には、一対の雄型連結部５０ａ，５０ｂが設けられている。詳しくは後述するが、本実施形態における左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造は、トンネルの軸方向に左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを相対スライドさせることで、雌型連結部４０ａ，４０ｂに雄型連結部５０ａ，５０ｂをそれぞれ係止することで、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する。   Hereinafter, the connection structure of the left side steel support 10L and the right side steel support 10R will be described. FIG. 2 is a view for explaining the connection structure of the left steel support 10L and the right steel support 10R according to the first embodiment. FIG. 2 schematically shows the female joint plate 121 and its surrounding structure in the left steel support 10L and the male joint plate 122 and its peripheral structure in the right steel support 10R. As shown in FIG. 2, the female joint plate 121 is provided with a pair of female connecting portions 40 a and 40 b. Further, the male joint plate 122 is provided with a pair of male connecting portions 50a and 50b. Although the details will be described later, the connection structure of the left steel support 10L and the right steel support 10R in the present embodiment slides the left steel support 10L and the right steel support 10R relative to each other in the axial direction of the tunnel. Thus, the left steel support 10L and the right steel support 10R are connected by locking the male connection parts 50a and 50b to the female connection parts 40a and 40b, respectively.

図３（ａ）は、図２におけるＡ矢視図であり、雌型継手板１２１の当接面１２１ａ側を示す図である。図３（ｂ）は、図３（ａ）におけるＢ−Ｂ矢視断面図である。図４（ａ）は、図２におけるＣ矢視図であり、雄型継手板１２２の当接面１２２ａ側を示す図である。図４（ｂ）は、図４（ａ）におけるＤ−Ｄ矢視断面図である。   FIG. 3A is a view on arrow A in FIG. 2 and is a view showing the contact surface 121 a side of the female joint plate 121. FIG.3 (b) is a BB arrow sectional drawing in FIG. 3 (a). FIG. 4A is a view on arrow C in FIG. 2 and is a view showing the contact surface 122 a side of the male joint plate 122. FIG.4 (b) is DD arrow sectional drawing in Fig.4 (a).

ここで、雌型継手板１２１の当接面（外面）１２１ａ及び雄型継手板１２２の当接面（外面）１２２ａは、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際に突き合わされ、互いに当接する面である。雌型継手板１２１の当接面１２１ａ及び雄型継手板１２２の当接面１２２ａにおける外形とその大きさは互いに等しい。符号１２１ｂは、雌型継手板１２１の裏面（内面）である。符号１２２ｂは、雄型継手板１２２の裏面（内面）である。また、符号１２１ｃは雌型継手板１２１の上縁、符号１２１ｄは雌型継手板１２１の下縁、符号１２１ｅは雌型継手板１２１の坑口側縁、符号１２１ｆは雌型継手板１２１の切羽側縁である。また、符号１２２ｃは雄型継手板１２２の上縁、符号１２２ｄは雄型継手板１２２の下縁、符号１２２ｅは雄型継手板１２２の坑口側縁、符号１２２ｆは雄型継手板１２２の切羽側縁である。図３（ａ）及び図４（ａ）に、雌型継手板１２１及び雄型継手板１２２の高さ方向及び横幅方向を図示する。   Here, when connecting the contact surface (outer surface) 121a of the female joint plate 121 and the contact surface (outer surface) 122a of the male joint plate 122, when connecting the left steel support 10L and the right steel support 10R. It is a surface which abuts and abuts on each other. The outer shape and size of the contact surface 121 a of the female joint plate 121 and the contact surface 122 a of the male joint plate 122 are equal to each other. Reference numeral 121 b is a back surface (inner surface) of the female joint plate 121. Reference numeral 122 b is a back surface (inner surface) of the male joint plate 122. Further, reference numeral 121 c is an upper edge of the female joint plate 121, reference numeral 121 d is a lower edge of the female joint plate 121, reference numeral 121 e is an end side edge of the female joint plate 121, and reference numeral 121 f is a face of the female joint plate 121. It is an edge. Further, reference numeral 122c is an upper edge of the male joint plate 122, reference numeral 122d is a lower edge of the male joint plate 122, reference numeral 122e is an end side edge of the male joint plate 122, and reference numeral 122f is a face side of the male joint plate 122. It is an edge. The height direction and the width direction of the female joint plate 121 and the male joint plate 122 are illustrated in FIGS. 3 (a) and 4 (a).

雌型継手板１２１の高さ方向は、坑口側縁１２１ｅ及び切羽側縁１２１ｆの延伸方向と平行である。また、雌型継手板１２１と第１本体部１１１とが連結される端部において、ウェブ１１１ａの延伸方向に雌型継手板１２１の高さ方向が一致している。また、雌型継手板１２１の横幅方向は上縁１２１ｃ及び下縁１２１ｄの延伸方向と平行である。また、雌型継手板１２１と第１本体部１１１とが連結される端部において、地山側フランジ１１１ｂ及び内空側フランジ１１１ｃの延伸方向に雌型継手板１２１の横幅方向が一致している。また、雄型継手板１２２の高さ方向は坑口側縁１２２ｅ及び切羽側縁１２２ｆの延伸方向と平行である。また、雄型継手板１２２と第２本体部１１２が連結される端部において、ウェブ１１２ａの延伸方向に雄型継手板１２２の高さ方向が一致している。また、雄型継手板１２２の横幅方向は上縁１２２ｃ及び下縁１２２ｄの延伸方向と平行である。また、雄型継手板１２２と第２本体部１１２が連結される端部において、地山側フランジ１１２ｂ及び内空側フランジ１１２ｃの延伸方向に雄型継手板１２２の横幅方向が一致して
いる。 The height direction of the female joint plate 121 is parallel to the extending direction of the wellbore side edge 121e and the face side edge 121f. Further, at the end where the female joint plate 121 and the first main body portion 111 are connected, the height direction of the female joint plate 121 matches the extending direction of the web 111 a. Further, the lateral width direction of the female joint plate 121 is parallel to the extending direction of the upper edge 121 c and the lower edge 121 d. Further, at the end where the female joint plate 121 and the first main body portion 111 are connected, the lateral width direction of the female joint plate 121 matches the extension direction of the ground-side flange 111b and the inner air-side flange 111c. Further, the height direction of the male joint plate 122 is parallel to the extending direction of the wellbore side edge 122e and the face side edge 122f. Further, at the end where the male joint plate 122 and the second main body 112 are connected, the height direction of the male joint plate 122 matches the extending direction of the web 112 a. Further, the lateral width direction of the male joint plate 122 is parallel to the extending direction of the upper edge 122 c and the lower edge 122 d. Further, at the end where the male joint plate 122 and the second main body portion 112 are connected, the lateral width direction of the male joint plate 122 matches the extension direction of the ground-side flange 112b and the inner air-side flange 112c.

なお、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際、雌型継手板１２１における上縁１２１ｃ及び雄型継手板１２２における上縁１２２ｃはトンネルの地山側に面する。また、雌型継手板１２１における下縁１２１ｄ及び雄型継手板１２２における下縁１２２ｄはトンネルの内空側に面する。また、雌型継手板１２１における坑口側縁１２１ｅ及び雄型継手板１２２における坑口側縁１２２ｅはトンネルの坑口側に面する。また、雌型継手板１２１における切羽側縁１２１ｆ及び雄型継手板１２２における切羽側縁１２２ｆはトンネルの切羽側に面する。また、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する際、雌型継手板１２１の当接面１２１ａにおける横幅方向と、雄型継手板１２２の当接面１２２ａにおける横幅方向は、トンネルの軸方向に対して平行である。   When the left steel support 10L and the right steel support 10R are connected, the upper edge 121c of the female joint plate 121 and the upper edge 122c of the male joint plate 122 face the bottom of the tunnel. Further, the lower edge 121 d of the female joint plate 121 and the lower edge 122 d of the male joint plate 122 face the inner air side of the tunnel. Further, the wellhead side edge 121e of the female joint plate 121 and the wellhead side edge 122e of the male joint plate 122 face the wellhead side of the tunnel. Further, the face side edge 121f of the female joint plate 121 and the face side edge 122f of the male joint plate 122 face the face side of the tunnel. When the left steel support 10L and the right steel support 10R are connected, the lateral width direction of the abutment surface 121a of the female coupling plate 121 and the lateral width direction of the abutment surface 122a of the male coupling plate 122 are as follows: Parallel to the axial direction of the tunnel.

図３（ａ）及び（ｂ）に示すように、雌型継手板１２１に設けられる一対の雌型連結部４０ａ，４０ｂは、雌型継手板１２１における坑口側縁１２１ｅに開口すると共に当接面１２１ａの横幅方向に沿って延在する直線状の係止溝孔４１ａ，４１ｂを有する。係止溝孔４１ａ，４１ｂは、雌型継手板１２１を厚さ方向に貫通している。ここで、係止溝孔４１ａ，４１ｂのうち、雌型継手板１２１における坑口側縁１２１ｅに開口する方の一端を挿入口４１０と呼ぶ。また、図３（ａ）に示すように、係止溝孔４１の他端側は、雌型継手板１２１の切羽側縁１２１ｆまで到達しておらず、切羽側縁１２１ｆの近傍に溝孔終端部４１１が形成されている。   As shown in FIGS. 3 (a) and 3 (b), the pair of female connectors 40a, 40b provided on the female joint plate 121 open at the wellbore side edge 121e of the female joint plate 121 and make contact surfaces. It has linear locking slot 41a, 41b extended along the width direction of 121a. The locking groove holes 41a and 41b pass through the female joint plate 121 in the thickness direction. Here, one end of the locking groove holes 41a and 41b which is open to the wellhead side edge 121e of the female joint plate 121 is referred to as an insertion port 410. Further, as shown in FIG. 3 (a), the other end side of the locking groove hole 41 does not reach the face side edge 121f of the female joint plate 121, and the end of the groove hole near the face side edge 121f. The part 411 is formed.

また、一対の雌型連結部４０ａ，４０ｂにおける係止溝孔４１ａ，４１ｂの溝幅Ｗ３は、一対の雄型連結部５０ａ，５０ｂにおける挿通壁部５１ａ，５１ｂの壁厚Ｗ２よりも大きく、且つ、係止頭部５２ａ，５２ｂの幅寸法Ｗ１よりも小さい。また、左側鋼製支保工１０Ｌにおける第１本体部１１１のウェブ１１１ａには、雌型継手板１２１の裏面１２１ｂとの接続位置に一対の切欠き４２ａ，４２ｂが形成されている。一対の切欠き４２ａ，４２ｂは、一対の雌型連結部４０ａ，４０ｂにおける係止溝孔４１ａ，４１ｂにそれぞれ連通している。第１本体部１１１のウェブ１１１ａに形成された一対の切欠き４２ａ，４２ｂは、雄型連結部５０ａ，５０ｂにおける係止頭部５２ａ，５２ｂの縦断面を若干拡大した縦断面を有している。一対の切欠き４２ａ，４２ｂは、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時において、第１本体部１１１のウェブ１１１ａに対して係止頭部５２ａ，５２ｂが干渉しないようにするために設けた開口である。また、本実施形態においては、一対の雄型連結部５０ａ，５０ｂにおける挿通壁部５１ａ，５１ｂの当接面１２２ａからの突出寸法は、雌型継手板１２１の厚さ寸法と等しいか、それよりも若干大きな寸法に設定されている。   The groove width W3 of the locking groove holes 41a and 41b in the pair of female connection portions 40a and 40b is larger than the wall thickness W2 of the insertion wall portions 51a and 51b in the pair of male connection portions 50a and 50b, and , Smaller than the width dimension W1 of the locking head 52a, 52b. Further, in the web 111a of the first main body 111 in the left steel support 10L, a pair of notches 42a and 42b are formed at the connection position with the back surface 121b of the female joint plate 121. The pair of notches 42a and 42b respectively communicate with the locking groove holes 41a and 41b in the pair of female connection parts 40a and 40b. The pair of notches 42a and 42b formed in the web 111a of the first main body portion 111 has a longitudinal cross section which is a slightly enlarged longitudinal cross section of the locking heads 52a and 52b in the male coupling portions 50a and 50b. . The pair of notches 42a and 42b prevent the locking heads 52a and 52b from interfering with the web 111a of the first main body 111 when the left steel support 10L and the right steel support 10R are connected. It is an opening provided to Further, in the present embodiment, the projection dimension from the contact surface 122a of the insertion wall portions 51a, 51b in the pair of male connection portions 50a, 50b is equal to or greater than the thickness dimension of the female joint plate 121 Are also set to slightly larger dimensions.

次に、雄型継手板１２２に設けられている一対の雄型連結部５０ａ，５０ｂは、雄型継手板１２２の当接面１２２ａから垂直に立設すると共に、当接面１２２ａの横幅方向に沿って延在する挿通壁部５１ａ，５１ｂと、この挿通壁部５１ａ，５１ｂの先端部に連設される係止頭部５２ａ，５２ｂと、を有している。図４（ａ）に示すように当接面１２２ａの横幅方向は、当接面１２２ａ内において地山側フランジ１１２ｂ及び内空側フランジ１１２ｃフランジの延在方向と平行に伸びている。また、図４（ａ）に示すように、雄型連結部５０ａ，５０ｂにおける挿通壁部５１及び係止頭部５２は、雄型継手板１２２の全幅に亘って形成されてはおらず、坑口側縁１２２ｅから切羽側縁１２２ｆの手前までの範囲に形成されている。また、一対の雄型連結部５０ａ，５０ｂにおける係止頭部５２ａ，５２ｂの幅寸法Ｗ１は、挿通壁部５１ａ，５１ｂの壁厚Ｗ２よりも大きい。係止頭部５２ａ，５２ｂの幅寸法Ｗ１及び挿通壁部５１ａ，５１ｂの壁厚Ｗ２は共に、当接面１２２ａの高さ方向に沿った寸法である。   Next, the pair of male connection portions 50a and 50b provided on the male joint plate 122 vertically stand from the contact surface 122a of the male joint plate 122, and in the lateral width direction of the contact surface 122a. It has insertion wall parts 51a and 51b extended along, and locking head parts 52a and 52b provided in a row at the tip of the insertion wall parts 51a and 51b. As shown in FIG. 4A, the lateral width direction of the contact surface 122a extends in the contact surface 122a in parallel with the extending direction of the ground-side flange 112b and the inner air-side flange 112c. Further, as shown in FIG. 4A, the insertion wall 51 and the locking head 52 in the male connection parts 50a and 50b are not formed over the entire width of the male joint plate 122, and the wellhead side It is formed in the range from the edge 122e to the front of the face side edge 122f. Further, the width dimension W1 of the locking head portions 52a and 52b in the pair of male connection portions 50a and 50b is larger than the wall thickness W2 of the insertion wall portions 51a and 51b. Both the width dimension W1 of the locking head portions 52a and 52b and the wall thickness W2 of the insertion wall portions 51a and 51b are dimensions along the height direction of the contact surface 122a.

次に、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結方法について説明する。
図５は、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結する直前の左側鋼製支保工１０Ｌの雌型継手板１２１及び右側鋼製支保工１０Ｒの雄型継手板１２２の位置関係を説明する図である。図５において、雌型継手板１２１については当接面１２１ａ側から眺めた状態を示し、雄型継手板１２２については裏面１２２ｂ側から眺めた状態を示している。 Next, a method of connecting the left steel support 10L and the right steel support 10R will be described.
FIG. 5 shows the positional relationship between the female joint plate 121 of the left steel support 10L and the male joint plate 122 of the right steel support 10R just before connecting the left steel support 10L and the right steel support 10R. FIG. In FIG. 5, the female joint plate 121 is viewed from the contact surface 121 a side, and the male joint plate 122 is viewed from the back surface 122 b.

左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結に際しては、まず、図５に示すように、雌型継手板１２１及び雄型継手板１２２がトンネル軸方向における前後にずれた状態となるように左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを配置する。図５に示す状態では、雌型継手板１２１及び雄型継手板１２２の上縁１２１ｃ，１２２ｃ同士の位置、下縁１２１ｄ，１２２ｄ同士の位置は互いに一致している。また、本実施形態では、雌型継手板１２１における坑口側縁１２１ｅに係止溝孔４１ａ，４１ｂの挿入口４１０が開口しており、雌型継手板１２１の坑口側縁１２１ｅ側から雄型継手板１２２の雄型連結部５０ａ，５０ｂを雌型連結部４０ａ，４０ｂにスライド係合させてゆく。そのため、図５に示すように、雄型継手板１２２における切羽側縁１２２ｆが、雌型継手板１２１における坑口側縁１２１ｅよりも若干坑口側に位置した状態で近接するように、左側鋼製支保工１０Ｌの雌型継手板１２１と右側鋼製支保工１０Ｒの雄型継手板１２２の相対位置について調整する。なお、図５に示す状態において、雌型継手板１２１の当接面１２１ａ及び雄型継手板１２２の当接面１２２ａは、トンネルの軸方向において同一面内に位置している。   When connecting the left steel support 10L and the right steel support 10R, first, as shown in FIG. 5, the female joint plate 121 and the male joint plate 122 are displaced forward and backward in the tunnel axial direction. Thus, the left steel support 10L and the right steel support 10R are arranged. In the state shown in FIG. 5, the positions of the upper edges 121 c and 122 c of the female joint plate 121 and the male joint plate 122 and the positions of the lower edges 121 d and 122 d coincide with each other. Further, in the present embodiment, the insertion holes 410 of the locking groove holes 41a and 41b are opened at the wellhead side edge 121e of the female joint plate 121, and the male joint is viewed from the side of the wellhead side 121e of the female joint plate 121. The male connectors 50a and 50b of the plate 122 are slidably engaged with the female connectors 40a and 40b. Therefore, as shown in FIG. 5, the left steel support such that the face side edge 122f of the male joint plate 122 is located closer to the wellhead side than the wellhead side edge 121e of the female joint plate 121. The relative position between the female joint plate 121 of the work 10L and the male joint plate 122 of the right side steel support 10R is adjusted. In the state shown in FIG. 5, the contact surface 121a of the female joint plate 121 and the contact surface 122a of the male joint plate 122 are located in the same plane in the axial direction of the tunnel.

なお、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結及び建て込み作業は、例えば、図６に示すようなエレクタ装置１００を用いて行うことができる。図６は、エレクタ装置１００を搭載する作業車２００の上面図である。エレクタ装置１００は、同一構成の一対のブーム１７Ｌ，１７Ｒを備えている。一対のブーム１７Ｌ，１７Ｒは、これらに付設される駆動機構の作動によって伸縮動作、傾動動作、揺動動作、回動動作が自在である。また、各ブーム１７Ｌ，１７Ｒの先端には、同一構成の一対のハンド１８Ｌ，１８Ｒが連結されている。一対のハンド１８Ｌ，１８Ｒは、これらに付設される駆動機構の作動によって回転動作および揺動動作が自在であり、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒをそれぞれ着脱自在に挟圧把持（保持）することができる。エレクタ装置１００は、一対のハンド１８Ｌ，１８Ｒに左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを把持し、各ハンド１８Ｌ，１８Ｒを駆動することで左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結すると共に、所定の建て込み位置に建て込むことができる。   The connection and erection work of the left steel support 10L and the right steel support 10R can be performed using, for example, an elector apparatus 100 as shown in FIG. FIG. 6 is a top view of the work vehicle 200 on which the elector device 100 is mounted. The elector apparatus 100 includes a pair of booms 17L and 17R having the same configuration. The pair of booms 17L and 17R can freely extend and retract, tilt, swing and turn by operation of a drive mechanism attached thereto. Further, a pair of hands 18L and 18R having the same configuration are connected to the tips of the booms 17L and 17R. The pair of hands 18L and 18R can freely rotate and swing by the operation of the drive mechanism attached to them, and can hold the left steel support 10L and the right steel support 10R in a detachable manner, respectively. It can be (held). The erector device 100 holds the left steel support 10L and the right steel support 10R on the pair of hands 18L and 18R and drives the hands 18L and 18R to support the left steel support 10L and the right steel support. The work 10R can be connected and erected at a predetermined erection position.

本実施形態に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結方法においては、エレクタ装置１００の各ハンド１８Ｌ，１８Ｒにそれぞれ把持した左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを、図５に示すような初期位置から、一対のハンド１８Ｌ，１８の少なくとも何れかを駆動させ、トンネル軸方向に沿って雌型継手板１２１及び雄型継手板１２２を互いに接近させていく。すなわち、雌型継手板１２１及び雄型継手板１２２の当接面１２１ａ，１２２ａ同士を同一面内に保持した状態で、エレクタ装置１００におけるハンドを駆動することで、雌型継手板１２１及び雄型継手板１２２をトンネル軸方向に沿って相対スライドさせる。   In the method of connecting the left steel support 10L and the right steel support 10R according to the present embodiment, the left steel support 10L and the right steel support 10R are held by the respective hands 18L and 18R of the elector device 100. At least one of the pair of hands 18L and 18 is driven from the initial position as shown in FIG. 5 to move the female joint plate 121 and the male joint plate 122 closer to each other along the tunnel axial direction. That is, the female joint plate 121 and the male mold are driven by driving the hand in the elector device 100 in a state in which the contact surfaces 121a and 122a of the female joint plate 121 and the male joint plate 122 are held in the same plane. The joint plate 122 is relatively slid along the tunnel axial direction.

図７は、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結している途中の状況を示す図である。図７において、雌型継手板１２１及び雄型継手板１２２の当接面１２１ａ，１２２ａ同士を当接させながら、坑口側縁１２１ｅと坑口側縁１２２ｅ同士の位置が合致し、切羽側縁１２１ｆと切羽側縁１２２ｆ同士の位置が合致するように、トンネルの軸方向すなわち当接面１２１ａ，１２２ａの横幅方向に沿って雌型継手板１２１及び雄型継手板１２２を相対スライドさせてゆく。そして、雄型連結部５０ａ，５０ｂの挿通壁部５１ａ，５１ｂにおける端部５１０が雌型連結部４０ａ，４０ｂの係止溝孔４１ａ，４１ｂ
における挿入口４１０に到達すると、挿通壁部５１ａ，５１ｂが係止溝孔４１ａ，４１ｂ内へ挿入される。 FIG. 7 is a view showing a state in the middle of connecting the left steel support 10L and the right steel support 10R. In FIG. 7, while bringing the abutment surfaces 121a and 122a of the female joint plate 121 and the male joint plate 122 into contact with each other, the positions of the wellhead side edge 121e and the wellhead side edge 122e coincide with each other, and the face side edge 121f and The female joint plate 121 and the male joint plate 122 are relatively slid along the axial direction of the tunnel, that is, the lateral width direction of the contact surfaces 121a and 122a so that the positions of the face side edges 122f coincide with each other. The end 510 of the insertion wall 51a, 51b of the male connector 50a, 50b is the locking groove hole 41a, 41b of the female connector 40a, 40b.
When the insertion port 410 is reached, the insertion wall portions 51a and 51b are inserted into the locking groove holes 41a and 41b.

上記のように、係止溝孔４１ａ，４１ｂの溝幅Ｗ３は挿通壁部５１の壁厚Ｗ２よりも大きな寸法に設定されているため、係止溝孔４１ａ，４１ｂ内へと挿通壁部５１ａ，５１ｂを円滑に進入させることができる。また、雄型連結部５０ａ，５０ｂにおける挿通壁部５１ａ，５１ｂの突出寸法は、雌型継手板１２１の板厚と等しいか、若干大きな寸法に設定されているため、係止溝孔４１ａ，４１ｂに挿通壁部５１ａ，５１ｂを挿通させた状態で、挿通壁部５１ａ，５１ｂの先端部に連設された幅広の係止頭部５２ａ，５２ｂを雌型継手板１２１の裏面１２１ｂ側に配置させることができる。すなわち、雌型連結部４０ａ，４０ｂの係止溝孔４１ａ，４１ｂに雄型連結部５０ａ，５０ｂの挿通壁部５１ａ，５１ｂを挿通させつつ、雌型継手板１２１の係止溝孔４１ａ，４１ｂの縁部１２１ｇに係止頭部５２ａ，５２ｂが係止される。   As described above, since the groove width W3 of the locking groove holes 41a and 41b is set to be larger than the wall thickness W2 of the insertion wall portion 51, the insertion wall portion 51a is inserted into the locking groove holes 41a and 41b. , 51b can be made to enter smoothly. In addition, since the projection dimensions of the insertion wall portions 51a and 51b in the male connection portions 50a and 50b are set equal to or slightly larger than the plate thickness of the female joint plate 121, the locking groove holes 41a and 41b. With the insertion wall portions 51a and 51b inserted, the wide locking head portions 52a and 52b continuously provided at the tip end portions of the insertion wall portions 51a and 51b are disposed on the back surface 121b side of the female joint plate 121 be able to. That is, while inserting the insertion wall portions 51a and 51b of the male connection portions 50a and 50b into the engagement groove holes 41a and 41b of the female connection portions 40a and 40b, the engagement groove holes 41a and 41b of the female joint plate 121 The locking head 52a, 52b is locked to the edge 121g of the

このように、係止溝孔４１ａ，４１ｂにおける縁部１２１ｇに係止頭部５２ａ，５２ｂが係止された状態においては、トンネルの軸方向すなわち当接面１２１ａ，１２２ａの横幅方向に沿った雌型継手板１２１及び雄型継手板１２２の相対スライドは許容されつつ、係止頭部５２が係止溝孔４１から（雌型継手板１２１と垂直方向に）抜け出すことにより雌型連結部４０ａ，４０ｂと雄型連結部５０ａ，５０ｂの連結が規制されることが抑制される。ここで、第１本体部１１１のウェブ１１１ａには、係止溝孔４１ａ，４１ｂと連通する一対の切欠き４２が形成されているため、係止頭部５２ａ，５２ｂがウェブ１１１ａと干渉することなく、雌型連結部４０ａ，４０ｂの係止溝孔４１ａ，４１ｂに沿って雄型連結部５０ａ，５０ｂを円滑に挿入できる。   Thus, in a state where the locking head portions 52a and 52b are locked to the edge 121g of the locking groove holes 41a and 41b, the female along the axial direction of the tunnel, that is, the lateral width direction of the contact surfaces 121a and 122a. While the relative slide of the mold joint plate 121 and the male joint plate 122 is allowed, the female coupling portion 40a, when the locking head 52 comes out of the locking slot 41 (in the direction perpendicular to the female joint plate 121), It is suppressed that connection of 40b and male type connection parts 50a and 50b is controlled. Here, since the web 111a of the first main body portion 111 is formed with a pair of notches 42 communicating with the locking groove holes 41a and 41b, the locking head portions 52a and 52b interfere with the web 111a. Instead, the male connection portions 50a, 50b can be smoothly inserted along the locking groove holes 41a, 41b of the female connection portions 40a, 40b.

そして、図８に示すように、雄型連結部５０ａ，５０ｂにおける挿通壁部５１ａ，５１ｂの端部５１０が、雌型連結部４０ａ，４０ｂの係止溝孔４１ａ，４１ｂにおける溝孔終端部４１１に到達すると、それ以上のスライドが規制される。なお、図８において、雄型継手板１２２を破線で示している。図８に示す状態において、雌型継手板１２１及び雄型継手板１２２の四辺が互いに重なっている。すなわち、雌型継手板１２１及び雄型継手板１２２の上縁１２１ｃ，１２２ｃ同士、下縁１２１ｄ，１２２ｄ同士、坑口側縁１２１ｅ，１２２ｅ同士、切羽側縁１２１ｆ，１２２ｆ同士の位置が互いに合致した状態となっている。   Then, as shown in FIG. 8, end portions 510 of the insertion wall portions 51 a and 51 b in the male connection portions 50 a and 50 b are groove hole end portions 411 in the locking groove holes 41 a and 41 b of the female connection portions 40 a and 40 b. Once reached, further slides are regulated. In FIG. 8, the male joint plate 122 is indicated by a broken line. In the state shown in FIG. 8, the four sides of the female joint plate 121 and the male joint plate 122 overlap each other. That is, the positions of the upper edges 121c and 122c, the lower edges 121d and 122d, the wellhead side edges 121e and 122e, and the face side edges 121f and 122f of the female joint plate 121 and the male joint plate 122 coincide with each other. It has become.

ここで、図９は、雄型連結部５０ａ，５０ｂにおける挿通壁部５１の端部５１０が、雌型連結部４０ａ，４０ｂの係止溝孔４１ａ，４１ｂにおける溝孔終端部４１１に当接するまで挿通壁部５１ａ，５１ｂを係止溝孔４１ａ，４１ｂにスライドさせた状態の雌型継手板１２１及び雄型継手板１２２の断面を示したものである。図９に示されるように、雌型連結部４０ａ，４０ｂの係止溝孔４１ａ，４１ｂに雄型連結部５０ａ，５０ｂの挿通壁部５１ａ，５１ｂが挿通した状態で、係止溝孔４１ａ，４１ｂの縁部１２１ｇに係止頭部５２ａ，５２ｂが係止された状態となっている。これにより、雌型継手板１２１及び雄型継手板１２２の当接面１２１ａ，１２２ａ同士を全面的に当接させた状態で、雌型連結部４０ａ，４０ｂに対して雄型連結部５０ａ，５０ｂが係止された状態となり、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結が完了する。   Here, in FIG. 9, until the end 510 of the insertion wall 51 in the male connection 50a, 50b abuts on the groove end 411 in the locking groove 41a, 41b of the female connection 40a, 40b. The cross sections of the female joint plate 121 and the male joint plate 122 in a state in which the insertion wall portions 51a and 51b are slid into the locking groove holes 41a and 41b are shown. As shown in FIG. 9, with the insertion wall portions 51a and 51b of the male connection portions 50a and 50b inserted into the engagement groove holes 41a and 41b of the female connection portions 40a and 40b, the engagement groove holes 41a, The locking head portions 52a and 52b are locked to the edge 121g of 41b. Thereby, in a state where the contact surfaces 121a and 122a of the female joint plate 121 and the male joint plate 122 are entirely in contact with each other, the male coupling portions 50a and 50b are formed with respect to the female coupling portions 40a and 40b. Is locked, and the connection of the left steel support 10L and the right steel support 10R is completed.

また、本実施形態によれば、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒをトンネル軸方向に相対スライドさせるだけでこれらを簡単に連結することができる。つまり、本実施形態における鋼製支保工の連結構造によれば、従来のように、トンネル坑壁付近に組まれた作業足場やエレクタ装置１００のマンケージ等に人員を配置してトンネル天端付近まで人員を移動させ、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの天端に位置する雌型継手板１２１及び雄型継手板１２２同士をボルト締結するといった連結作業を行う必
要がない。従って、本実施形態におけるトンネル支保工１０の連結構造によれば、従来に比べて、より短時間で簡単に、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結作業を行うことができる。また、本実施形態における鋼製支保工の連結構造によれば、エレクタ装置１００における一対のブーム１７Ｌ，１７Ｒに取り付けられたハンド１８Ｌ，１８Ｒの操作によって、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結することができるため、トンネルの切羽における人手作業を回避することができ、従来に比してより一層安全性及び作業性を向上することができる。 Further, according to the present embodiment, it is possible to easily connect the left steel support 10L and the right steel support 10R by simply sliding them relative to each other in the axial direction of the tunnel. That is, according to the connection structure of steel supports in the present embodiment, as in the prior art, personnel are arranged on the work scaffolding assembled in the vicinity of the tunnel pit wall, the mancage of the elector device 100, etc. There is no need to move the personnel and perform a connecting operation such as bolting the female joint plate 121 and the male joint plate 122 located at the top ends of the left steel support 10L and the right steel support 10R. Therefore, according to the connection structure of the tunnel support 10 in the present embodiment, the connection work of the left steel support 10L and the right steel support 10R can be easily performed in a shorter time than in the related art. . Further, according to the connection structure of steel supports in the present embodiment, the left steel support 10L and the right steel support are operated by the operation of the hands 18L and 18R attached to the pair of booms 17L and 17R in the elector apparatus 100. Since the work 10R can be connected, manual work at the face of the tunnel can be avoided, and safety and workability can be further improved compared to the prior art.

また、本実施形態におけるトンネル支保工１０の連結構造によれば、左側鋼製支保工１０Ｌの雌型継手板１２１及び右側鋼製支保工１０Ｒの雄型継手板１２２をトンネル軸方向に相対スライドさせることでこれらを連結する方式を採用したので、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結作業時において、トンネル坑壁（地山）の天頂部に左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒが干渉（衝突）し難くすることができる。そのため、安全性及び施工性をより一層向上することができる。なお、上記実施形態において、左側鋼製支保工１０Ｌの継手板に雌型連結部４０ａ，４０ｂを設置し、右側鋼製支保工１０Ｒの継手板に雄型連結部５０ａ，５０ｂを設置しているが、これには限られず、雌型連結部４０ａ，４０ｂと雄型連結部５０ａ，５０ｂを入れ替えても良い。また、左側鋼製支保工１０Ｌの継手板に配置する雌型連結部４０ａ，４０ｂの数と、右側鋼製支保工１０Ｒの継手板に配置する雄型連結部５０ａ，５０ｂの数は、適宜変更することができる。   Further, according to the connection structure of the tunnel support 10 in the present embodiment, the female joint plate 121 of the left steel support 10L and the male joint plate 122 of the right steel support 10R are relatively slid in the tunnel axial direction. Since the method of connecting these is adopted, the left steel support 10L and the right are installed on the top of the tunnel pit (ground) at the time of connecting the left steel support 10L and the right steel support 10R. The steel support 10R can be made less likely to cause interference (collision). Therefore, the safety and the workability can be further improved. In the above embodiment, the female connection portions 40a and 40b are installed on the joint plates of the left steel support 10L, and the male connection portions 50a and 50b are installed on the joint plates of the right steel support 10R. However, the present invention is not limited to this, and the female connectors 40a and 40b and the male connectors 50a and 50b may be interchanged. In addition, the number of female connection parts 40a and 40b disposed on the joint plate of the left steel support 10L and the number of male connection parts 50a and 50b disposed on the joint plate of the right steel support 10R are appropriately changed. can do.

＜実施形態２＞
次に、本発明の実施形態２について説明する。図１０は、実施形態２に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造を説明する図である。図１０には、左側鋼製支保工１０Ｌにおける雌型継手板１２１及びその周辺構造と、右側鋼製支保工１０Ｒにおける雄型継手板１２２及びその周辺構造を概略的に示している。図１１（ａ）は、図１０におけるＥ矢視図であり、雌型継手板１２１の当接面１２１ａ側を示す図である。図１１（ｂ）は、図１１（ａ）におけるＦ−Ｆ矢視断面図である。図１２（ａ）は、図１０におけるＧ矢視図である。図１２（ｂ）は、図１２（ａ）におけるＨ−Ｈ矢視断面図である。以下、実施形態２に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造について、実施形態１との相違点を中心に説明する。 Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 10 is a view for explaining the connection structure of the left steel support 10L and the right steel support 10R according to the second embodiment. FIG. 10 schematically shows the female joint plate 121 and its surrounding structure in the left steel support 10L and the male joint plate 122 and its peripheral structure in the right steel support 10R. FIG. 11A is a view on arrow E in FIG. 10 and is a view showing the contact surface 121 a side of the female joint plate 121. FIG.11 (b) is FF arrow sectional drawing in FIG. 11 (a). FIG. 12A is a view on arrow G in FIG. FIG.12 (b) is the HH arrow directional cross-sectional view in FIG. 12 (a). Hereinafter, the connection structure of the left steel support 10L and the right steel support 10R according to the second embodiment will be described focusing on differences from the first embodiment.

本実施形態においても、左側鋼製支保工１０Ｌの雌型継手板１２１には一対の雌型連結部４０ａ，４０ｂが設けられている。同様に、右側鋼製支保工１０Ｒの雄型継手板１２２には、一対の雄型連結部５０ａ，５０ｂが設けられている。本実施形態における雄型連結部５０ａ，５０ｂは、雄型継手板１２２の上縁１２２ｃ及び下縁１２２ｄによって形成されている。また、一対の雌型連結部４０ａ，４０ｂは、雌型継手板１２１における上縁１２１ｃ及び下縁１２１ｄにそれぞれ設けられた係止枠部４３ａ，４３ｂを有している。係止枠部４３ａ，４３ｂは、雌型継手板１２１における上縁１２１ｃ及び下縁１２１ｄに沿って延在している。   Also in the present embodiment, the female joint plate 121 of the left steel support 10L is provided with a pair of female connecting portions 40a and 40b. Similarly, the male joint plate 122 of the right steel support 10R is provided with a pair of male coupling portions 50a and 50b. The male connection portions 50 a and 50 b in the present embodiment are formed by the upper edge 122 c and the lower edge 122 d of the male joint plate 122. Further, the pair of female connection portions 40 a and 40 b have locking frame portions 43 a and 43 b respectively provided on the upper edge 121 c and the lower edge 121 d of the female joint plate 121. The locking frame portions 43 a and 43 b extend along the upper edge 121 c and the lower edge 121 d of the female joint plate 121.

係止枠部４３ａ，４３ｂは、雌型継手板１２１の当接面１２１ａから垂直に立設すると共に、当接面１２１ａの横幅方向に沿って延在する外壁部４３０と、外壁部４３０の先端部から直交方向にＬ字状に折れ曲って形成された係止壁部４３１を有する。そして、係止枠部４３ａ，４３ｂにおける係止壁部４３１と当接面１２１ａとの間には、雄型連結部５０ａ，５０ｂ（雄型継手板１２２の上縁１２２ｃ、又は下縁１２２ｄ）を収容可能な内空部４３２が形成されている。また、係止枠部４３ａ，４３ｂにおける坑口側縁１２１ｅ側の端部には、内空部４３２の挿入口４３２ａが形成されている。また、雌型継手板１２１の切羽側縁１２１ｆ側には、塞ぎ板４３３が設けられている。   The locking frame portions 43a and 43b are vertically erected from the contact surface 121a of the female joint plate 121, and the outer wall 430 extending along the width direction of the contact surface 121a and the tip of the outer wall 430 It has a locking wall 431 formed by bending in an L-shape in the orthogonal direction from the part. Then, male connecting portions 50a, 50b (upper edge 122c or lower edge 122d of the male joint plate 122) are formed between the locking wall 431 and the contact surface 121a in the locking frames 43a, 43b. An internal space portion 432 which can be accommodated is formed. Moreover, the insertion port 432a of the internal empty part 432 is formed in the edge part by the side of the wellbore side 121e in locking frame part 43a, 43b. In addition, on the face side edge 121 f side of the female joint plate 121, a closing plate 433 is provided.

以上のように構成される本実施形態における鋼製支保工の連結構造は、実施形態１と同様に、左側鋼製支保工１０Ｌの雌型継手板１２１及び右側鋼製支保工１０Ｒの雄型継手板１２２をトンネル軸方向に相対スライドさせることでこれらを連結する。すなわち、実施形態１と同様、図５に示すような初期位置に雌型継手板１２１及び雄型継手板１２２を配置した状態から、エレクタ装置１００における各ハンド１８Ｌ，１８Ｒを駆動することで、トンネル軸方向に沿って雌型継手板１２１及び雄型継手板１２２を互いに接近させてゆき、雌型継手板１２１における係止枠部４３ａ，４３ｂの内側に形成された内空部４３２に、挿入口４３２ａから雄型継手板１２２の上縁１２２ｃ及び下縁１２２ｄによって形成された雄型連結部５０ａ，５０ｂをそれぞれ挿入する。   As in the first embodiment, the connection structure of the steel support in the present embodiment configured as described above is the male type joint 121 of the left steel support 10L and the male type joint of the right steel support 10R. These are connected by relatively sliding the plate 122 in the tunnel axial direction. That is, as in the first embodiment, from the state where the female joint plate 121 and the male joint plate 122 are arranged at the initial position as shown in FIG. 5, the tunnel 18 is driven by driving the hands 18L and 18R in the elector device 100. The female joint plate 121 and the male joint plate 122 are made to approach each other along the axial direction, and the insertion opening is formed in the inner space portion 432 formed on the inner side of the locking frame portions 43a and 43b in the female joint plate 121. Male connection portions 50a and 50b formed by the upper edge 122c and the lower edge 122d of the male joint plate 122 are inserted from 432a.

そして、雄型連結部５０ａ，５０ｂが、係止枠部４３ａ，４３ｂの内側に形成された内空部４３２の奥部に配置された塞ぎ板４３３に当接すると、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結が完了する。この状態において、雄型継手板１２２の上縁１２２ｃ及び下縁１２２ｄによって形成される雄型連結部５０ａ，５０ｂが、雌型継手板１２１における一対の係止枠部４３ａ，４３ｂの係止壁部４３１に係止されることで、雌型継手板１２１と垂直方向に内空部４３２から抜け出すことが規制される。また、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結が完了した状態において他、雌型継手板１２１及び雄型継手板１２２の上縁１２１ｃ，１２２ｃ同士、下縁１２１ｄ，１２２ｄ同士、坑口側縁１２１ｅ，１２２ｅ同士、切羽側縁１２１ｆ，１２２ｆ同士の位置が互いに合致した状態となっている。これにより、雌型継手板１２１及び雄型継手板１２２を全面的に当接させた状態で左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結することができる。   Then, when the male connection portions 50a and 50b contact the closing plate 433 disposed at the back of the inner space portion 432 formed on the inner side of the locking frame portions 43a and 43b, the left steel support 10L and Connection of the right steel support 10R is completed. In this state, the male connection portions 50 a and 50 b formed by the upper edge 122 c and the lower edge 122 d of the male joint plate 122 are locking wall portions of the pair of locking frames 43 a and 43 b in the female joint plate 121. By being locked to 431, it is restricted from coming out of the inner space 432 in the direction perpendicular to the female joint plate 121. In addition, in the state where the connection of the left steel support 10L and the right steel support 10R is completed, the upper edges 121c and 122c of the female joint plate 121 and the male joint plate 122, the lower edges 121d and 122d, The positions of the wellhead side edges 121e and 122e and the face side edges 121f and 122f are in a state where they coincide with each other. Thus, the left steel support 10L and the right steel support 10R can be connected in a state where the female joint plate 121 and the male joint plate 122 are in full contact with each other.

本実施形態においても、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒをトンネル軸方向に相対スライドさせることで左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを簡単に連結することができるため、実施形態１と同様、安全性及び作業性の優れた鋼製支保工の連結構造及び連結方法を提供することができる。   Also in this embodiment, the left steel support 10L and the right steel support 10R can be easily connected by relatively sliding the left steel support 10L and the right steel support 10R in the axial direction of the tunnel. Therefore, as in the first embodiment, it is possible to provide a connection structure and a connection method of steel supports excellent in safety and workability.

＜実施形態３＞
次に、本発明の実施形態３について説明する。図１３は、実施形態３に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造を説明する図である。図１３には、左側鋼製支保工１０Ｌにおける雌型継手板１２１及びその周辺構造と、右側鋼製支保工１０Ｒにおける雄型継手板１２２及びその周辺構造を概略的に示している。図１４（ａ）は、図１３におけるＩ矢視図であり、雌型継手板１２１の当接面１２１ａ側を示す図である。図１４（ｂ）は、図１４（ａ）におけるＪ−Ｊ矢視断面図である。図１５（ａ）は、図１４におけるＫ矢視図であり、雄型継手板１２２の当接面１２２ａ側を示す図である。図１５（ｂ）は、図１５（ａ）におけるＬ−Ｌ矢視断面図である。以下、実施形態３に係る左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結構造について、実施形態１との相違点を中心に説明する。 Embodiment 3
Next, a third embodiment of the present invention will be described. FIG. 13 is a view for explaining the connection structure of the left steel support 10L and the right steel support 10R according to the third embodiment. FIG. 13 schematically shows the female joint plate 121 and its surrounding structure in the left steel support 10L and the male joint plate 122 and its peripheral structure in the right steel support 10R. FIG. 14A is a view on arrow I in FIG. 13 and is a view showing the side of the contact surface 121 a of the female joint plate 121. FIG.14 (b) is a JJ arrow directional cross-sectional view in FIG. 14 (a). FIG. 15A is a view on arrow K in FIG. 14 and is a view showing the contact surface 122 a side of the male joint plate 122. FIG.15 (b) is an LL arrow directional cross-sectional view in FIG. 15 (a). Hereinafter, the connection structure of the left steel support 10L and the right steel support 10R according to the third embodiment will be described focusing on differences from the first embodiment.

本実施形態においても、左側鋼製支保工１０Ｌの雌型継手板１２１には一対の雌型連結部４０ａ，４０ｂが設けられている。同様に、右側鋼製支保工１０Ｒの雄型継手板１２２には、一対の雄型連結部５０ａ，５０ｂが設けられている。ここで、一対の雌型連結部４０ａ，４０ｂは雌型継手板１２１の横幅方向に配列されており、一対の雄型連結部５０ａ，５０ｂは、雄型継手板１２２の横幅方向に配列されている。また、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結時において、雌型連結部４０ａと雄型連結部５０ａが係合し、雌型連結部４０ｂと雄型連結部５０ｂが係合する。   Also in the present embodiment, the female joint plate 121 of the left steel support 10L is provided with a pair of female connecting portions 40a and 40b. Similarly, the male joint plate 122 of the right steel support 10R is provided with a pair of male coupling portions 50a and 50b. Here, the pair of female connection portions 40 a and 40 b are arranged in the lateral width direction of the female joint plate 121, and the pair of male connection portions 50 a and 50 b are arranged in the lateral width direction of the male joint plate 122. There is. Further, when the left steel support 10L and the right steel support 10R are connected, the female connection portion 40a and the male connection portion 50a are engaged, and the female connection portion 40b and the male connection portion 50b are engaged. Do.

一対の雄型連結部５０ａ，５０ｂは、雄型継手板１２２の当接面１２２ａからから垂直に立設する棒状の挿通軸部５３ａ，５３ｂと、挿通軸部５３ａ，５３ｂにおける先端側連
設される係止頭部５４ａ，５４ｂを有している。係止頭部５４ａ，５４ｂは、雄型継手板１２２の当接面１２２ａの高さ方向に延伸しており、雌型継手板１２１の当接面１２１ａの高さ方向に沿った幅寸法Ｗ４は、挿通軸部５３ａ，５３ｂの幅寸法Ｗ５よりも大きい。なお、挿通軸部５３ａ，５３ｂの幅寸法Ｗ５は、雌型継手板１２１の当接面１２１ａの高さ方向に沿った寸法を指す。本実施形態において、雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂ及び係止頭部５４ａ，５４ｂは四角柱形状を有しているが、これには限られない。また、本実施形態においては、雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂの当接面１２２ａからの突出寸法は、雌型継手板１２１の板厚と等しいか、若干大きな寸法に設定されている。 The pair of male connection portions 50a and 50b are continuously provided at the tip end side of the insertion shaft portions 53a and 53b and rod-like insertion shaft portions 53a and 53b vertically erected from the contact surface 122a of the male joint plate 122 And locking heads 54a and 54b. The locking head portions 54a and 54b extend in the height direction of the contact surface 122a of the male joint plate 122, and the width dimension W4 along the height direction of the contact surface 121a of the female joint plate 121 is The width dimension W5 of the insertion shaft portions 53a and 53b is larger. The width dimension W5 of the insertion shaft portions 53a and 53b refers to the dimension along the height direction of the contact surface 121a of the female joint plate 121. In the present embodiment, the insertion shaft portions 53a and 53b and the locking heads 54a and 54b in the male coupling portions 50a and 50b have a quadrangular prism shape, but the present invention is not limited thereto. Further, in the present embodiment, the protrusion dimensions from the contact surface 122a of the insertion shaft portions 53a and 53b in the male connection portions 50a and 50b are set equal to or slightly larger than the plate thickness of the female joint plate 121. It is done.

次に、一対の雌型連結部４０ａ，４０ｂは、雌型継手板１２１を厚さ方向に貫通すると共に雄型連結部５０ａ，５０ｂの係止頭部５４ａ，５４ｂを挿入可能な頭部挿入口４４ａ，４４ｂと、当該頭部挿入口４４ａ，４４ｂと連通する係止溝孔４５ａ，４５ｂを含んでいる。雌型連結部４０ａ，４０ｂにおける頭部挿入口４４ａ，４４ｂは、雄型連結部５０ａ，５０ｂの係止頭部５４ａ，５４ｂを円滑に挿入できるように、係止頭部５４ａ，５４ｂよりも一回り大きな矩形平断面形状を有していても良い。また、雌型連結部４０ａ，４０ｂにおける係止溝孔４５ａ，４５ｂは、雌型継手板１２１における当接面１２１ａの横幅方向に沿って延在しており、且つ雌型継手板１２１を厚さ方向に貫通している。より具体的には、係止溝孔４５ａ，４５ｂは、頭部挿入口４４ａ，４４ｂの長手方向中央部から、直交方向に伸びており、全体で略Ｔ形状の雌型連結部４０ａ，４０ｂを形成している。なお、図１４（ａ）に示す例では、雌型連結部４０ａにおける頭部挿入口４４ａが雌型継手板１２１の坑口側縁１２１ｅに連なって開口しているが、坑口側縁１２１ｅに開口していなくても良い。   Next, the pair of female connection portions 40a and 40b penetrate the female joint plate 121 in the thickness direction and can be inserted into the head insertion holes into which the locking heads 54a and 54b of the male connection portions 50a and 50b can be inserted. It includes locking grooves 45a and 45b communicating with the head insertion openings 44a and 44b. The head insertion openings 44a and 44b in the female couplings 40a and 40b are one more than the locking heads 54a and 54b so that the locking heads 54a and 54b of the male couplings 50a and 50b can be inserted smoothly. It may have a large rectangular flat cross-sectional shape. Further, the locking groove holes 45a, 45b in the female connection portions 40a, 40b extend along the lateral width direction of the contact surface 121a in the female joint plate 121, and the female joint plate 121 has a thickness It penetrates in the direction. More specifically, the locking groove holes 45a, 45b extend in the orthogonal direction from the longitudinal center portions of the head insertion ports 44a, 44b, and the generally T-shaped female connection portions 40a, 40b are formed. It is formed. In the example shown in FIG. 14 (a), the head insertion port 44a in the female connection portion 40a is continuously opened with the wellhead side edge 121e of the female type joint plate 121, but is opened in the wellhead side edge 121e. You don't have to.

ここで、一対の雌型連結部４０ａ，４０ｂにおける係止溝孔４５ａ，４５ｂの溝幅Ｗ６は、一対の雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂの幅寸法Ｗ５よりも大きく、且つ、係止頭部５４ａ，５４ｂの幅寸法Ｗ４よりも小さい。なお、係止溝孔４５ａ，４５ｂの溝幅Ｗ６は、雌型継手板１２１における当接面１２１ａの高さ方向に沿った溝寸法を指す。また、図１４（ａ）における符号４５１は、係止溝孔４５ａ，４５ｂの溝孔終端部である。係止溝孔４５ａ，４５ｂの溝孔終端部４５１は、係止溝孔４５ａ，４５ｂにおいて頭部挿入口４４ａ，４４ｂと接続されていない方の端部である。   Here, the groove width W6 of the locking groove holes 45a and 45b in the pair of female connection portions 40a and 40b is larger than the width dimension W5 of the insertion shaft portions 53a and 53b in the pair of male connection portions 50a and 50b, And, it is smaller than the width dimension W4 of the locking head 54a, 54b. The groove width W6 of the locking groove holes 45a and 45b indicates the groove dimension along the height direction of the contact surface 121a of the female joint plate 121. Further, reference numeral 451 in FIG. 14A denotes a groove end portion of the locking groove holes 45a and 45b. The groove end portions 451 of the locking groove holes 45a and 45b are end portions of the locking groove holes 45a and 45b which are not connected to the head insertion holes 44a and 44b.

次に、本実施形態における鋼製支保工の連結方法について説明する。本実施形態においても、上述までの実施形態と同様、エレクタ装置１００の各ハンド１８Ｌ，１８Ｒに左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを把持した状態で、図１６に示すように雌型継手板１２１及び雄型継手板１２２を対向させた状態で近接させる。この状態において、図１６に示すように、雌型継手板１２１及び雄型継手板１２２の上縁１２１ｃ，１２２ｃ同士の位置、下縁１２１ｄ，１２２ｄ同士の位置は互いに一致している。また、図１６に示す状態において、雌型継手板１２１及び雄型継手板１２２は、雌型継手板１２１に比べて雄型継手板１２２よりもトンネル軸方向において若干坑口側に位置している。具体的には、雌型継手板１２の雌型連結部４０ａにおける頭部挿入口４４ａと雄型継手板１２２の雄型連結部５０ａにおける係止頭部５４ａが正対し、且つ、雌型継手板１２の雌型連結部４０ｂにおける頭部挿入口４４ｂと雄型継手板１２２の雄型連結部５０ｂにおける係止頭部５４ｂが正対している。   Next, the method of connecting steel supports in the present embodiment will be described. Also in the present embodiment, as shown in FIG. 16, the left steel support 10L and the right steel support 10R are gripped by the hands 18L and 18R of the elector device 100 as in the embodiments described above. The mold joint plate 121 and the male joint plate 122 are brought close to each other while facing each other. In this state, as shown in FIG. 16, the positions of the upper edges 121c and 122c of the female joint plate 121 and the male joint plate 122 and the positions of the lower edges 121d and 122d coincide with each other. Further, in the state shown in FIG. 16, the female joint plate 121 and the male joint plate 122 are positioned slightly closer to the wellhead side in the tunnel axial direction than the male joint plate 122 compared to the female joint plate 121. Specifically, the head insertion opening 44a in the female connection portion 40a of the female joint plate 12 and the locking head 54a in the male connection portion 50a of the male joint plate 122 face each other, and the female joint plate The head insertion port 44b of the twelve female connection portions 40b and the locking head 54b of the male connection portion 50b of the male joint plate 122 face each other.

図１６に示す状態から、雌型継手板１２１及び雄型継手板１２２の高さ方向及び横幅方向における相対位置を保持した状態で、雌型継手板１２１及び雄型継手板１２２を接近させてゆくことで、雌型継手板１２の雌型連結部４０ａ，４０ｂにおける頭部挿入口４４ａ，４４ｂに、雄型継手板１２２の雄型連結部５０ａ，５０ｂにおける係止頭部５４ａ，５４ｂ及び挿通軸部５３ａ，５３ｂをそれぞれ挿入する。各頭部挿入口４４ａ，４４ｂに対
する係止頭部５４ａ，５４ｂの挿入が完了した後、雌型継手板１２１及び雄型継手板１２２を当接面１２１ａ，１２２ａの横幅方向に沿って（トンネル軸方向に沿って）相対スライドさせることで、雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂを雌型連結部４０ａ，４０ｂにおける頭部挿入口４４ａ，４４ｂから係止溝孔４５ａ，４５ｂに進入させる。本実施形態においては、例えば左側鋼製支保工１０Ｌをトンネル軸方向における坑口側にスライドさせ、或いは、右側鋼製支保工１０Ｒをトンネル軸方向における切羽側にスライドさせることで、雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂを雌型連結部４０ａ，４０ｂにおける係止溝孔４５ａ，４５ｂに進入させることができる。なお、上記のように、係止溝孔４５ａ，４５ｂの溝幅Ｗ６は挿通軸部５３ａ，５３ｂの幅寸法Ｗ５よりも大きな寸法に設定されているため、係止溝孔４５ａ，４５ｂ内へと挿通軸部５３ａ，５３ｂを円滑に進入させることができる。 From the state shown in FIG. 16, the female joint plate 121 and the male joint plate 122 are made to approach with the relative position in the height direction and the lateral width direction of the female joint plate 121 and the male joint plate 122 maintained. Thus, the head insertion openings 44a and 44b in the female connection portions 40a and 40b of the female joint plate 12 and the locking heads 54a and 54b and the insertion shaft in the male connection portions 50a and 50b of the male joint plate 122. The sections 53a and 53b are inserted respectively. After the insertion of the locking heads 54a and 54b into the respective head insertion openings 44a and 44b is completed, the female joint plate 121 and the male joint plate 122 are arranged along the lateral width direction of the contact surfaces 121a and 122a (tunnel shaft By sliding relative to each other in the direction), the insertion shaft portions 53a, 53b of the male coupling portions 50a, 50b from the head insertion openings 44a, 44b of the female coupling portions 40a, 40b to the locking groove holes 45a, 45b Let in. In the present embodiment, for example, the left side steel support 10L is slid toward the wellhead side in the tunnel axial direction, or the right steel support 10R is slid toward the face in the tunnel axial direction. , 50b can be inserted into the locking groove holes 45a, 45b in the female connection portions 40a, 40b. As described above, since the groove width W6 of the locking groove holes 45a and 45b is set to be larger than the width dimension W5 of the insertion shaft portions 53a and 53b, the locking groove holes 45a and 45b are inserted into the locking groove holes 45a and 45b. The insertion shaft portions 53a and 53b can be made to smoothly enter.

また、雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂの当接面１２２ａからの突出寸法は、雌型継手板１２１の板厚と等しいか、当該板厚よりも若干大きな寸法に設定されている。そのため、雌型連結部４０ａ，４０ｂにおける係止溝孔４５ａ，４５ｂに雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂを挿通させた状態で、係止頭部５４ａ，５４ｂを雌型継手板１２１の裏面１２１ｂ側に配置させることができる。これにより、雌型継手板１２１の係止溝孔４５ａ，４５ｂの縁部１２１ｇに、雄型連結部５０ａ，５０ｂにおける係止頭部５２ａ，５２ｂを係止することができる。そして、雄型連結部５０ａ，５０ｂにおける挿通軸部５３ａ，５３ｂが、雌型連結部４０ａ，４０ｂの係止溝孔４５ａ，４５ｂにおける溝孔終端部４５１に到達すると、それ以上の相対スライドが規制される。これにより、雌型連結部４０ａ，４０ｂに対して雄型連結部５０ａ，５０ｂが係止された状態で、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結が完了する。なお、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒの連結が完了した状態で、雌型継手板１２１及び雄型継手板１２２の上縁１２１ｃ，１２２ｃ同士、下縁１２１ｄ，１２２ｄ同士、坑口側縁１２１ｅ，１２２ｅ同士、切羽側縁１２１ｆ，１２２ｆ同士の位置が互いに合致している。これにより、雌型継手板１２１及び雄型継手板１２２を全面的に当接させた状態で左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを連結することができる。   Further, the protrusion dimensions from the contact surface 122a of the insertion shaft portions 53a, 53b in the male coupling portions 50a, 50b are set to be equal to or slightly larger than the plate thickness of the female joint plate 121. ing. Therefore, with the insertion shaft portions 53a and 53b in the male connection portions 50a and 50b inserted into the locking groove holes 45a and 45b in the female connection portions 40a and 40b, the locking head portions 54a and 54b are female joints It can be disposed on the back surface 121 b side of the plate 121. Thus, the locking head portions 52a and 52b of the male connection portions 50a and 50b can be locked to the edge portions 121g of the locking groove holes 45a and 45b of the female joint plate 121. Then, when the insertion shaft portions 53a, 53b in the male connection portions 50a, 50b reach the groove end portions 451 in the locking groove holes 45a, 45b of the female connection portions 40a, 40b, the relative slide further is restricted Be done. Thereby, the connection of the left steel support 10L and the right steel support 10R is completed in a state where the male connection parts 50a, 50b are engaged with the female connection parts 40a, 40b. In the state where the connection of the left steel support 10L and the right steel support 10R is completed, the upper edges 121c and 122c of the female joint plate 121 and the male joint plate 122, the lower edges 121d and 122d, and the wellhead The positions of the side edges 121e and 122e, and the face side edges 121f and 122f coincide with each other. Thus, the left steel support 10L and the right steel support 10R can be connected in a state where the female joint plate 121 and the male joint plate 122 are in full contact with each other.

以上のように、本実施形態においても、左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒをトンネル軸方向に相対スライドさせることで左側鋼製支保工１０Ｌ及び右側鋼製支保工１０Ｒを簡単に連結することができるため、実施形態１及び２と同様、安全性及び作業性の優れた鋼製支保工の連結構造及び連結方法を提供することができる。   As described above, also in the present embodiment, the left steel support 10L and the right steel support 10R can be easily made by relatively sliding the left steel support 10L and the right steel support 10R in the axial direction of the tunnel. Since connection is possible, it is possible to provide a connection structure and a connection method of steel supports excellent in safety and workability as in the first and second embodiments.

以上、本発明の実施形態を説明したが、本発明に係る鋼製支保工の連結構造はこれらに限られず、可能な限りこれらを組み合わせることができる。   As mentioned above, although embodiment of this invention was described, the connection structure of steel supports concerning this invention is not restricted to these, As long as possible, these can be combined.

１０・・・トンネル支保工
１０Ｌ・・・左側鋼製支保工
１０Ｒ・・・右側鋼製支保工
４０ａ，４０ｂ・・・雌型連結部
５０ａ，５０ｂ・・・雄型連結部
１１１・・・第１本体部
１１２・・・第２本体部
１２１・・・雌型継手板
１２２・・・雄型継手板 10: Tunnel support 10L: Left steel support 10R: Right steel support 40a, 40b: Female connection portion 50a, 50b: Male connection portion 111: First 1 body part 112 ... second body part 121 ... female joint plate 122 ... male joint plate

Claims (5)

トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結するための鋼製支保工の連結構造であって、
一方の前記鋼製支保工の天端部に設けられると共に雄型連結部を有する雄型継手板と、
他方の前記鋼製支保工の天端部に設けられると共に雌型連結部を有する雌型継手板と、
を備え、
前記雄型継手板及び前記雌型継手板の当接面同士が当接した状態で当該当接面の横幅方向に相対スライドすることで、前記雌型連結部に前記雄型連結部が係止される、
鋼製支保工の連結構造。 A connecting structure of steel supports for connecting a pair of arc-shaped divided steel supports erected along a tunnel pit wall to each other at their top ends,
A male joint plate provided at the top end of one of the steel supports and having a male joint;
A female joint plate provided at the top end of the other steel support and having a female joint;
Equipped with
When the contact surfaces of the male joint plate and the female joint plate abut each other, the male connection portion is engaged with the female connection portion by relative sliding in the width direction of the contact surface. To be
Connection structure of steel supports. 前記雄型連結部は、
前記雄型継手板の前記当接面から垂直に立設すると共に当該当接面の横幅方向に沿って延在する挿通壁部と、
前記挿通壁部における前記当接面との接続端と反対側の端部に連設されると共に、前記当接面の高さ方向に沿った幅寸法が前記挿通壁部の壁厚よりも大きな係止頭部と、
を含み、
前記雌型連結部は、前記雌型継手板における一方の側縁に開口すると共に前記当接面の横幅方向に沿って延在すると共に前記雌型継手板を厚さ方向に貫通する係止溝孔を含み、
前記係止溝孔の溝幅は、前記挿通壁部の壁厚よりも大きく且つ前記係止頭部の幅寸法よりも小さく、
前記係止溝孔に前記挿通壁部を挿通させつつ前記雌型継手板における前記係止溝孔の縁部に前記係止頭部を係止可能である、
請求項１に記載の鋼製支保工の連結構造。 The male connector is
And an insertion wall extending vertically from the contact surface of the male joint plate and extending along the width direction of the contact surface;
The insertion wall is connected to an end of the insertion wall opposite to the connection end with the contact surface, and the width dimension along the height direction of the contact surface is larger than the wall thickness of the insertion wall A locking head,
Including
The female connection portion is a locking groove that opens at one side edge of the female joint plate and extends along the lateral width direction of the contact surface and penetrates the female joint plate in the thickness direction Including holes,
The groove width of the locking slot is greater than the wall thickness of the insertion wall and smaller than the width dimension of the locking head,
The locking head can be locked to the edge portion of the locking groove in the female joint plate while inserting the insertion wall portion into the locking groove.
The connection structure of steel supports according to claim 1. 前記雄型連結部は、前記雄型継手板における上縁及び下縁によって形成され、
前記雌型連結部は、前記雌型継手板における上縁及び下縁にそれぞれ設けられると共に当該上縁及び下縁に沿って延在する一対の係止枠部を含み、
前記一対の係止枠部は、前記雌型継手板の前記当接面から垂直に立設すると共に当該当接面の横幅方向に沿って延在する外壁部と、前記外壁部における前記当接面との接続端と反対側の端部から直交方向に折れ曲って形成された係止壁部と、を有し、前記係止壁部は、前記当接面との間に形成される内空部に前記雄型連結部を収容することで前記雄型連結部を係止可能である、
請求項１に記載の鋼製支保工の連結構造。 The male connection is formed by the upper edge and the lower edge of the male joint plate,
The female connection portion includes a pair of locking frames provided on the upper edge and the lower edge of the female joint plate and extending along the upper edge and the lower edge, respectively.
The pair of locking frame portions vertically erect from the contact surface of the female joint plate and the outer wall extending along the width direction of the contact surface, and the contact at the outer wall A locking wall portion formed by bending in the orthogonal direction from the end opposite to the connection end with the surface, and the locking wall portion is formed between the locking wall portion and the contact surface The male connection portion can be locked by housing the male connection portion in an empty portion.
The connection structure of steel supports according to claim 1. 前記雄型連結部は、
前記雄型天端継手板の前記当接面から垂直に立設する棒状の挿通軸部と、
前記挿通壁部における前記当接面との接続端と反対側の端部に連設されると共に、前記当接面の高さ方向に沿った幅寸法が前記挿通軸部よりも大きな係止頭部と、
を含み、
前記雌型連結部は、前記雌型継手板を厚さ方向に貫通すると共に前記係止頭部を挿入可能な頭部挿入口と、
前記頭部挿入口と連通すると共に前記当接面の横幅方向に沿って延在し、且つ前記雌型継手板を厚さ方向に貫通する係止溝孔と、
を含み、
前記係止溝孔の溝幅は、前記挿通軸部の軸幅よりも大きく且つ前記係止頭部の幅寸法よりも小さく、
前記係止溝孔に前記挿通軸部を挿通させつつ前記雌型継手板における前記係止溝孔の縁部に前記係止頭部を係止可能である、
請求項１に記載の鋼製支保工の連結構造。 The male connector is
A rod-like insertion shaft vertically erected from the contact surface of the male top end joint plate;
The lock head is connected to an end of the insertion wall opposite to the connection end with the contact surface, and the width dimension along the height direction of the contact surface is larger than that of the insertion shaft Department,
Including
The female connection portion is a head insertion port which penetrates the female joint plate in the thickness direction and can insert the locking head;
A locking slot communicating with the head insertion slot and extending along the lateral width direction of the contact surface and penetrating the female joint plate in the thickness direction;
Including
The groove width of the locking groove is larger than the axial width of the insertion shaft portion and smaller than the width dimension of the locking head,
The locking head can be locked to the edge portion of the locking groove in the female joint plate while inserting the insertion shaft portion into the locking groove.
The connection structure of steel supports according to claim 1. トンネル坑壁に沿って建て込まれる円弧状に分割された一対の鋼製支保工をそれぞれの天端部同士で相互に連結する鋼製支保工の連結方法であって、
一方の前記鋼製支保工の天端部に、雄型連結部を有する雄型継手板が設けられ、
他方の前記鋼製支保工の天端部に、雌型連結部を有する雄型継手板が設けられ、
前記鋼製支保工の連結方法は、前記雄型継手板及び前記雌型継手板の当接面同士が当接した状態で当該当接面の横幅方向に相対スライドすることで、前記雌型連結部に前記雄型連結部が係止される、
鋼製支保工の連結方法。 A method for connecting steel supports, in which a pair of arc-shaped divided steel supports erected along a tunnel pit wall are mutually connected at their top ends,
A male joint plate having a male coupling portion is provided at the top end of one of the steel supports;
At the top end of the other said steel support, a male joint plate with a female connection is provided,
In the connection method of the steel support, the female connection is achieved by relative sliding in the width direction of the contact surface while the contact surfaces of the male joint plate and the female joint plate are in contact with each other. The male connector is locked to the
How to connect steel supports.
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JP2020143426A (en) * 2019-03-04 2020-09-10 株式会社安藤・間 Connection structure and connection method for tunnel timbering
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JP2020143426A (en) * 2019-03-04 2020-09-10 株式会社安藤・間 Connection structure and connection method for tunnel timbering
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CN113756867A (en) * 2021-10-15 2021-12-07 中铁五局集团第一工程有限责任公司 Wind and water pipeline fixing device of underground excavated tunnel and installation method thereof
CN113756867B (en) * 2021-10-15 2022-05-20 中铁五局集团第一工程有限责任公司 Wind and water pipeline fixing device of underground excavated tunnel and installation method thereof

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