JP2017150176A - Cylindrical body for box-shaped roof - Google Patents

Cylindrical body for box-shaped roof Download PDF

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JP2017150176A
JP2017150176A JP2016031704A JP2016031704A JP2017150176A JP 2017150176 A JP2017150176 A JP 2017150176A JP 2016031704 A JP2016031704 A JP 2016031704A JP 2016031704 A JP2016031704 A JP 2016031704A JP 2017150176 A JP2017150176 A JP 2017150176A
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box
shaped
cylinder
shaped roof
roof
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JP6441842B2 (en
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植村 誠
Makoto Uemura
誠 植村
賢治郎 植村
Kenjiro Uemura
賢治郎 植村
公博 坂
Kimihiro Saka
公博 坂
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植村 誠
Makoto Uemura
誠 植村
賢治郎 植村
Kenjiro Uemura
賢治郎 植村
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Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical body for a box-shaped roof, which can improve workability by easily and reliably preventing the cylindrical body for the box-shaped roof sagging downward, by easy operations.SOLUTION: A cylindrical body 6 for a box-shaped roof is made of an approximately rectangular cross-section steel pipe which has an end provided with a joint flange 6c for bolt joint and which has an end corner formed as a blockout 6d opened outward. A slit rail 20 is provided in a lengthwise direction of the cylindrical body as a fitting for bolt insertion on a lower lateral side at an end of the cylindrical body. A head flat plate 22a of an inverted T-shaped bolt member 22 is fitted into the slit rail 20.SELECTED DRAWING: Figure 1

Description

本発明は、函体を推進または牽引させて鉄道、道路下に横断地下道を構築する工法に用いられる箱形ルーフ用筒体に関するものである。   The present invention relates to a box-shaped roof cylinder used in a construction method in which a box is propelled or towed to construct a tramway under a railway or road.
鉄道、道路等の下部地中に大幅員の地下構造物を横断方向に掘進させるには、上部交通を支承するための防護工が必要となり、かかる防護工として従来鋼管等を水平に並列させるパイプルーフを設けることなどが挙げられるが、地中に掘進させる地下構造物の防護工を別工事として施工することなく、地下構造物の掘進と同時に行うので安全かつ確実に、しかも安価に工事ができ、また土被りも浅く施工できるものとして、次のような工法が知られている。   In order to dig a large number of underground structures in the lower ground such as railways and roads in the transverse direction, it is necessary to have a protective work for supporting the upper traffic. It is possible to construct a roof, etc., but it is possible to work safely, reliably and inexpensively because it will be carried out at the same time as excavation of the underground structure without constructing the protective work of the underground structure to be excavated underground. In addition, the following construction methods are known as methods of shallow construction.
これは図6にも示すように、まず、鉄道等上部交通1の脇に土留め鋼矢板2を打設して、発進坑3と到達坑4を築造し、該発進坑3内に圧入機5を設置してこれで箱形ルーフ用筒体6を到達坑4に向けて圧入させる。   As shown in FIG. 6, first, the earth retaining steel sheet pile 2 is placed beside the upper traffic 1 such as a railroad, and the start pit 3 and the arrival pit 4 are constructed. 5 is installed, and the box-shaped roof cylinder 6 is press-fitted toward the access shaft 4.
箱形ルーフ用筒体6は図9に示すように、鋼管による略正方形断面の箱形筒体であり、側面に鉤状の構成部材が外向きに並ぶ雄型継手6aと、内向きに並ぶ雌型継手6bを長手方向に連続して形成し、また上面に平板からなるフリクションカッター7を取付けている。   As shown in FIG. 9, the box-shaped roof cylinder 6 is a box-shaped cylinder having a substantially square cross section made of a steel pipe, and is arranged inward with a male joint 6 a in which saddle-shaped components are arranged outward on the side surface. A female joint 6b is formed continuously in the longitudinal direction, and a friction cutter 7 made of a flat plate is attached to the upper surface.
かかる箱形ルーフ用筒体6は単位筒体を1本ずつ圧入するものであり、端部にボルト接合用の継手フランジ6cを形成し、この継手フランジ6c同士をボルト、ナット19で締結することにより1ピースずつ長さ方向に継ぎ足して必要長を埋設し、さらに継手6a,6bを介して横方向に連続させながら並列させる。   The box-shaped roof cylinder 6 is for press-fitting unit cylinders one by one, and a joint flange 6c for bolt connection is formed at the end, and the joint flange 6c is fastened with bolts and nuts 19 together. Then, the necessary length is buried by adding one piece at a time in the length direction, and further paralleled through the joints 6a and 6b in the lateral direction.
ボルト、ナット19での締結は、箱形ルーフ用筒体6の端部隅角を外向き開放の箱抜き6dとして、この部分において行なう。   Fastening with bolts and nuts 19 is performed at this portion with the box corner 6d of the box-shaped roof tubular body 6 as an outwardly open box opening 6d.
箱形ルーフ用筒体6の並べ方は一文字型、門型、函型などで配設する地下構造物9に合わせて適宜選択される。   The way of arranging the box-shaped roof cylinders 6 is appropriately selected according to the underground structure 9 arranged in a single character type, a gate shape, a box shape or the like.
次いで、図7に示すように発進坑3内に反力壁8、コンクリート函体による地下構造物9をセットし、反力壁8と地下構造物9との間には元押しの推進ジャッキ10を設け、地下構造物9の先端に刃口11を設けるとともに地下構造物9の先端と前記ルーフ用筒体6との間に小ジャッキ12を介在させる。   Next, as shown in FIG. 7, a reaction wall 8 and an underground structure 9 made of a concrete box are set in the starting pit 3, and a propulsion jack 10 is pushed between the reaction wall 8 and the underground structure 9. In addition, a blade 11 is provided at the tip of the underground structure 9 and a small jack 12 is interposed between the tip of the underground structure 9 and the roof cylinder 6.
図中13はルーフ用筒体6の支持材、14はフリクションカッター7の止め部材でこれらは発進坑3側に設け、一方、到達坑4側に受台15を設ける。   In the figure, reference numeral 13 denotes a support material for the roof cylinder 6, and 14 denotes a stop member for the friction cutter 7, which are provided on the start shaft 3 side, while a receiving base 15 is provided on the arrival shaft 4 side.
小ジャッキ12を伸長して地下構造物9を反力としてフリクションカッター7を残しながら箱形ルーフ用筒体6を1本ずつ順次押し進め、一通り箱形ルーフ用筒体6が前進したならば、小ジャッキ12を縮め、今度は推進ジャッキ10を伸長して地下構造物9を掘進させる。図中16は推進ジャッキ10と地下構造物9間に介在させるストラットである。   If the box-shaped roof cylinder 6 is moved forward one by one while the small jack 12 is extended and the underground structure 9 is used as a reaction force to leave the friction cutter 7, the box-shaped roof cylinder 6 moves forward. The small jack 12 is shrunk, and this time the propulsion jack 10 is extended to dig up the underground structure 9. In the figure, 16 is a strut interposed between the propulsion jack 10 and the underground structure 9.
このようにして、ルーフ用筒体6の前進と地下構造物9の前進とを交互に繰り返しながら、到達坑4に出た箱形ルーフ用筒体6は順次撤去する。   In this way, the box-shaped roof cylinder 6 that has come out to the access shaft 4 is sequentially removed while the forward advance of the roof cylinder 6 and the advance of the underground structure 9 are alternately repeated.
そして、地下構造物9の先端が到達坑4に達したならば、刃口11等を撤去し適宜裏込めグラウトを行って施工を完了する。   Then, when the tip of the underground structure 9 reaches the reaching pit 4, the blade edge 11 and the like are removed, and backfill grout is appropriately performed to complete the construction.
なお、地下構造物9はプレキャスト製のコンクリート函体を発進坑3内に順次吊り下ろして接続していくようにしてもよいし、発進坑3内でコンクリートを打設して必要長を増設するようにしてもよい。   In addition, the underground structure 9 may be constructed by sequentially suspending and connecting precast concrete boxes in the start pit 3, or adding concrete in the start pit 3 to increase the required length. You may do it.
また、地下構造物9の前進方法について、到達坑4側に反力壁及びセンターホール式の牽引ジャッキを設け、一端を地下構造物9に定着したPC鋼線による牽引部材をこの牽引ジャッキで引くことにより到達坑4側から地下構造物9を引き込むようにする工法もある。   As for the advancement method of the underground structure 9, a reaction wall and a center hall type traction jack are provided on the arrival pit 4 side, and a traction member made of PC steel wire having one end fixed to the underground structure 9 is pulled with this traction jack. There is also a construction method in which the underground structure 9 is pulled in from the arrival mine 4 side.
下記特許文献は箱形ルーフ用筒体6を使用する他の工法例であり、SFT工法“(Simple and Face-Less Method of Construction of Tunnel)「シンプルで切羽の無いトンネルの構築工法」の略称”と名付けられ、下記非特許文献1にも掲載されている。
特許第4134089号公報 特許第4317843号公報 インターネットウエブサイトの植村技研工業株式会社のホームページhttp://www.uemuragiken.co.jp/tech/sft.html
The following patent document is another example of construction method using a box-shaped roof tubular body 6, and is an abbreviation of “SFT construction method (Simple and Face-Less Method of Construction of Tunnel)”. And is also published in Non-Patent Document 1 below.
Japanese Patent No. 4134089 Japanese Patent No. 4317843 Homepage of Uemura Giken Kogyo Co., Ltd., an internet website http://www.uemuragiken.co.jp/tech/sft.html
箱形ルーフを圧入後、コンクリート函体を推進させる場合、函体の推進とともに切羽部の土砂を箱形ルーフと一緒に押し出すので、切羽部を掘削する作業を別途必要とせず、コスト削減と工期短縮を図ることができ、また、危険を伴う切羽部の掘削作業を省くことで安全性も向上でき、しかも、函体を推進するための反力抵抗を分散することで、大掛かりな設備を必要としない地下構造物の施工法である。   When a concrete box is propelled after press-fitting a box roof, the earth and sand of the face part is pushed out together with the box form roof as well as the box form, so there is no need for additional work to excavate the face part, cost reduction and construction period It can be shortened, safety can be improved by omitting dangerous facet excavation work, and large-scale equipment is required by distributing reaction force resistance to propel the box This is a construction method for underground structures.
前記のような軌道下に箱形ルーフを先行き施工した後、コンクリート構造物(函体)を推進して箱形ルーフと入れ替える地下構造物の構築方法においては、図8に示すように箱形ルーフ推進中および推進後から函体推進までの残置中、鉛直方向にたわむ傾向があり、軌道を上下に変位させる原因となり、また、このたわみ部分が地下構造物の掘進に支障を来すことにもなり、施工が困難となる。   In the construction method of an underground structure in which a box-shaped roof is constructed under the track as described above, and then the concrete structure (box) is promoted and replaced with the box-shaped roof, as shown in FIG. During propulsion and during the rest from propulsion to the box propulsion, there is a tendency to bend in the vertical direction, causing the trajectory to move up and down, and this flexing part also hinders the excavation of underground structures. Therefore, the construction becomes difficult.
下記特許文献はルーフ用筒体が下方にたるむことを防止し、施工性の向上を図ることのできる地下構造物の構築方法におけるルーフ用筒体の沈下防止装置および沈下防止方法として提案したものである。
特許第3702265号公報
The following patent document is proposed as a roof cylinder settlement prevention apparatus and settlement prevention method in a construction method of an underground structure that can prevent the roof cylinder from sagging downward and improve workability. is there.
Japanese Patent No. 3702265
図5に示すように上部にフリクションカッター7を配設した箱形ルーフ用筒体6を発進坑3から地中に圧入して並列させ、発進坑3に残る箱形ルーフ用筒体6の後部に地下構造物9を配設し、フリクションカッター7を地中に残置しながら地下構造物9を掘進させる地下構造物9の構築方法において、前記箱形ルーフ用筒体6の内部に長さ方向にわたって該ルーフ用筒体6の下方へのたるみ部分を引き上げる引き上げ用の索条17a、17bを貫通させた。   As shown in FIG. 5, a box-shaped roof cylinder 6 having a friction cutter 7 disposed on the top thereof is press-fitted into the ground from the start shaft 3 and arranged in parallel. In the construction method of the underground structure 9 in which the underground structure 9 is disposed while the friction cutter 7 is left in the ground while the friction cutter 7 is left in the ground, the box-shaped roof tubular body 6 has a longitudinal direction. The pulling ropes 17a and 17b for pulling up the slack portion of the roof cylinder 6 downward are passed through.
箱形ルーフ用筒体6の内部に長さ方向にわたって貫通させた索条を水平方向に引っ張ることで、該索条に作用する上下の垂直方向への分力が箱形ルーフ用筒体6に伝達され、箱形ルーフ用筒体6のたるみ部分が引き上げられて、たるみが解消される。   By pulling the rope penetrated in the longitudinal direction inside the box-shaped roof cylinder 6 in the horizontal direction, the vertical vertical component acting on the string is applied to the box-shaped roof cylinder 6. Then, the slack portion of the box-shaped roof tubular body 6 is pulled up, and the slack is eliminated.
箱形ルーフ用筒体6のたわみ防止の手段としては、主にボルト、ナット19を増設したり、引張側(ルーフ下側)への後付プレートで対応しているが、十分な効果を得ることが出来なかった。   As means for preventing deflection of the box-shaped roof tubular body 6, bolts and nuts 19 are mainly added or a retrofit plate on the tension side (roof lower side) is used, but sufficient effects are obtained. I couldn't.
また、前記特許文献3によるルーフ用筒体の沈下防止では索条によりたるみ部分を引き上げるもので、装置が大掛かりなものとなる。   Further, in the prevention of the settlement of the roof cylinder according to Patent Document 3, the slack portion is pulled up by the rope, and the apparatus becomes large.
本発明の目的は前記従来例の不都合を解消し、簡単な作業で、箱形ルーフ用筒体が下方にたるむことを簡単かつ確実に防止し、施工性の向上を図ることのできる箱形ルーフ用筒体を提供することにある。   The object of the present invention is to solve the disadvantages of the conventional example, and to prevent the box-shaped roof cylinder from sagging downward with a simple operation, and to improve the workability. It is in providing a cylinder for use.
前記目的を達成するため請求項1記載の本発明は、ボルト接合用の継手フランジを端部に設け、端部隅角を外向き開放の箱抜きとした略矩形断面鋼管の箱形ルーフ用筒体であり、筒体端部の下側辺にスリットレールを閂挿入用金具として筒体長さ方向に向けて設け、このスリットレールに逆T字形閂部材の頭部平板を嵌め込むことを要旨とするものである。   In order to achieve the above object, the present invention according to claim 1 provides a box-shaped roof cylinder of a substantially rectangular cross-section steel pipe in which a joint flange for bolt joining is provided at the end and the corner of the end is open outward. The gist of the present invention is to provide a slit rail on the lower side of the end portion of the cylinder as a metal fitting for hook insertion in the length direction of the cylinder, and to fit the head flat plate of the inverted T-shaped hook member into this slit rail. To do.
請求項1記載の本発明によれば、略矩形断面鋼管の箱形ルーフ用筒体は端部に継手フランジを形成し、この継手フランジ同士をボルト、ナットで締結することにより1ピースずつ長さ方向に継ぎ足してなるものであるが、スリットレールに嵌め込む逆T字形閂部材を接続箇所において相互に掛け渡すことで、接続箇所の曲げ耐荷重強度を上げ、箱形ルーフ用筒体が下方にたるむことを簡単かつ確実に防止できる。   According to the first aspect of the present invention, the box-shaped roof tubular body having a substantially rectangular cross-section steel pipe is formed with a joint flange at the end, and the joint flanges are fastened with bolts and nuts to increase the length by one piece. It is formed by adding in the direction, but by crossing the inverted T-shaped hook members that fit into the slit rails at the connection point, the bending load strength of the connection point is increased, and the box-shaped roof cylinder is moved downward. It is possible to prevent sagging easily and reliably.
箱形ルーフ用筒体の応力は、引張り側(ルーフ下側)に作用することから、逆T字形閂部材を下側に設置することで、これに対応することができる。   Since the stress of the box-shaped roof cylinder acts on the pulling side (roof lower side), it is possible to cope with this by installing an inverted T-shaped saddle member on the lower side.
特に逆T字形閂部材は断面T字形で頭部平板に直交してなる立板部は補強材として単なる平板と比べて強度がある。   In particular, the inverted T-shaped eaves member has a T-shaped cross section, and the upright plate portion perpendicular to the head flat plate is stronger than a simple flat plate as a reinforcing material.
また、接続する一方の箱形ルーフ用筒体のスリットレールに逆T字形閂部材をすべて入り込ませておき、箱形ルーフ用筒体をボルト、ナットで接続後、逆T字形閂部材をスライドさせて双方の箱形ルーフ用筒体に掛け渡すことができ、作業を簡単に行うことができる。   Also, put all inverted T-shaped rod members into the slit rail of one box-shaped roof cylinder to be connected, slide the inverted T-shaped rod member after connecting the box-shaped roof cylinder with bolts and nuts. It can be hung on both box-shaped roof cylinders, and the work can be performed easily.
さらに、逆T字形閂部材は箱形ルーフ用筒体回収後はこれを外して繰り返して使用でき、脱着式のため箱形ルーフ用筒体を痛めることもない。   Further, the inverted T-shaped eaves member can be removed and used repeatedly after the box-shaped roof cylinder is collected, and the box-shaped roof cylinder is not damaged because it is removable.
請求項2記載の本発明は、逆T字形閂部材の頭部平板に直交してなる立板部はこれを取手として使用することを要旨とするものである。   The gist of the present invention described in claim 2 is that the upright plate portion orthogonal to the head flat plate of the inverted T-shaped heel member is used as a handle.
請求項2記載の本発明によれば、逆T字形閂部材の頭部平板に直交してなる立板部はこれを取手として使用することにより、逆T字形閂部材の頭部平板をスリットレールに嵌め込むことや、スリットレールに対して移動させることを該取手をもって簡単に行うことができる。   According to the second aspect of the present invention, the upright plate portion orthogonal to the head flat plate of the inverted T-shaped heel member is used as a handle so that the head flat plate of the inverted T-shaped heel member can be used as a slit rail. It can be easily carried out with the handle to be fitted in or moved with respect to the slit rail.
請求項3記載の本発明は、スリットレールは間隔を存して並列させることを要旨とするものである。   The gist of the present invention described in claim 3 is that the slit rails are arranged in parallel at a distance.
請求項3記載の本発明によれば、閂挿入用金具であるスリットレールはこれを間隔を存して並列させることにより、逆T字形閂部材をもって複数個所で安定して下方にたるむことを防止できる。   According to the third aspect of the present invention, the slit rails, which are the metal fittings for inserting the hooks, are arranged in parallel at intervals, thereby preventing the inverted T-shaped hook members from being stably sagging downward at a plurality of locations. it can.
以上述べたように本発明の箱形ルーフ用筒体は、簡単な作業で、箱形ルーフ用筒体が下方にたるむことを簡単かつ確実に防止し、施工性の向上を図ることのできるものである。   As described above, the box roof cylinder of the present invention can easily and reliably prevent the box roof cylinder from sagging downward and improve workability through simple operations. It is.
以下、図面について本発明の実施の形態を詳細に説明する。図1は本発明の箱形ルーフ用筒体の1実施形態を示す正面図、図2は同上部分縦断側面図で、図中6は従来と同様、基本構成は鋼管による略正方形断面の箱形ルーフ用筒体であり、端部に継手フランジ6cが形成してある。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of a box roof cylinder according to the present invention, FIG. 2 is a partially longitudinal side view of the same, and in FIG. It is a cylinder for roofs, and a joint flange 6c is formed at the end.
図示は省略するが、継手フランジ6cは図9に示すようなボルト挿通孔を形成した板体であり、これを相互に重ねることでボルト締結ができる。   Although illustration is omitted, the joint flange 6c is a plate body in which bolt insertion holes as shown in FIG. 9 are formed, and the bolts can be fastened by overlapping them.
箱形ルーフ用筒体6は断面形状が1,000×1,000(mm)、長さ3,000(mm)、もしくは、断面形状が800×800(mm)、長さ6,000(mm)で、側面の鉤状の構成部材である雄型継手6aと雌型継手6b(図9参照)はある場合と無い場合とがある。   The box-shaped roof cylinder 6 has a cross-sectional shape of 1,000 × 1,000 (mm) and a length of 3,000 (mm), or a cross-sectional shape of 800 × 800 (mm) and a length of 6,000 (mm). The male joint 6a and the female joint 6b (see FIG. 9), which are constituent members, may or may not be present.
また、箱形ルーフ用筒体6は端部隅角を外向き開放の箱抜き6dとし、ここをボルト・ナットの締結部としている。   Further, the box-shaped roof tubular body 6 has a box corner 6d whose end corner is open to the outside, and this is a fastening portion for bolts and nuts.
本発明は箱形ルーフ用筒体6の筒体端部の下側辺にスリットレール20を閂挿入用金具として筒体長さ方向に向けて設けた。スリットレール20は天板の中央にスリット21を長さ方向に向けて形成したチャンネル材であり、箱形ルーフ用筒体6の周壁の内側に溶接等で取付けられる。   In the present invention, the slit rail 20 is provided on the lower side of the end portion of the cylindrical body 6 for the box-shaped roof as a hook insertion fitting in the length direction of the cylinder. The slit rail 20 is a channel material in which the slit 21 is formed in the center of the top plate with the slit 21 facing in the length direction, and is attached to the inside of the peripheral wall of the box-shaped roof cylinder 6 by welding or the like.
また、このスリットレール20は間隔を存して並列させて、2条設けるものである。   In addition, the slit rail 20 is provided in parallel with two intervals.
スリットレール20の端は前記継手フランジ6cを切り欠き、継手フランジ6c面にその開放口を顕出させた。   The end of the slit rail 20 was cut out of the joint flange 6c, and the opening was exposed on the surface of the joint flange 6c.
図中22はこの閂挿入用金具としてのスリットレール20に嵌め込む逆T字形閂部材で、頭部平板22aとこれに直交してなる立板部22bとからなり、頭部平板22aがスリットレール20内に挿入する部材であり、立板部22bはスリット21を貫通してスリットレール20の上方に立ち上がる。   In the figure, reference numeral 22 denotes an inverted T-shaped scissors member that fits into the slit rail 20 as a scissor insertion metal fitting, which comprises a head flat plate 22a and a vertical plate portion 22b perpendicular to the head flat plate 22a. The upright plate portion 22 b rises above the slit rail 20 through the slit 21.
ちなみに前記逆T字形閂部材22は長さ1,000〜1,500mm程度、立板部22aを含めた高さ250mm程度である。   Incidentally, the inverted T-shaped flange member 22 has a length of about 1,000 to 1,500 mm and a height of about 250 mm including the upright plate portion 22a.
箱形ルーフ用筒体6の使い方としては、前記図6、図7に示した通りであり、鉄道等上部交通1の脇に土留め鋼矢板2を打設して、発進坑3と到達坑4を築造し、該発進坑3内に圧入機5を設置してこれで箱形ルーフ用筒体6を到達坑4に向けて圧入させなどである。   As shown in FIGS. 6 and 7, the box roof cylinder 6 is used as shown in FIG. 6 and FIG. 4 is constructed, and a press-fitting machine 5 is installed in the start pit 3 so that the box-shaped roof cylinder 6 is press-fitted toward the arrival pit 4.
箱形ルーフ用筒体6は、継手フランジ6c同士をボルト、ナット19で締結することにより1ピースずつ長さ方向に継ぎ足して必要長を埋設するが、一方の箱形ルーフ用筒体6のスリットレール20内に逆T字形閂部材22を嵌め込んでおく。この場合、逆T字形閂部材22の端部はスリットレール20の端部よりも引っ込ませる。   The box-shaped roof cylinder 6 is connected to the joint flange 6c with bolts and nuts 19 to add one piece at a time in the length direction and embed the required length. An inverted T-shaped scissors member 22 is fitted in the rail 20. In this case, the end of the inverted T-shaped scissors member 22 is retracted more than the end of the slit rail 20.
箱形ルーフ用筒体6同士をボルト接合後、逆T字形閂部材22をスライドさせて他側の箱形ルーフ用筒体6のスリットレール20内に半分(500mm〜750mm)を挿入させ、この逆T字形閂部材22を箱形ルーフ用筒体6同士に架け渡す。   After the box roof cylinders 6 are bolted together, the inverted T-shaped rod member 22 is slid to insert a half (500 mm to 750 mm) into the slit rail 20 of the other box roof cylinder 6. The inverted T-shaped eaves member 22 is bridged between the box-shaped roof cylinders 6.
なお、逆T字形閂部材22をスライドさせるのに、頭部平板22aに直交してなる立板部22bはこれを取手として使用することができる。   In order to slide the inverted T-shaped scissors member 22, the upright plate portion 22b perpendicular to the head flat plate 22a can be used as a handle.
このようにして、逆T字形閂部材22を箱形ルーフ用筒体6の接続箇所において相互に掛け渡すことで、接続箇所の曲げ耐荷重強度を上げ、箱形ルーフ用筒体6が下方にたるむことを簡単かつ確実に防止できる。   In this manner, the inverted T-shaped eaves member 22 is crossed over at the connection portion of the box-shaped roof cylinder 6 so that the bending load strength at the connection portion is increased, and the box-shaped roof cylinder 6 is moved downward. It is possible to prevent sagging easily and reliably.
本発明の箱形ルーフ用筒体の1実施形態を示す閂部材装着後の正面図である。It is a front view after the collar member mounting | wearing which shows one Embodiment of the cylinder for box-shaped roofs of this invention. 本発明の箱形ルーフ用筒体の1実施形態を示す閂部材装着後の部分縦断側面図である。It is a partial vertical side view after attaching the gutter member which shows one Embodiment of the cylinder for box-shaped roofs of this invention. 本発明の箱形ルーフ用筒体の1実施形態を示す閂部材装着前の正面図である。It is a front view before attaching the eaves member which shows one Embodiment of the cylinder for box-shaped roofs of this invention. 本発明の箱形ルーフ用筒体の1実施形態を示す閂部材装着前の部分縦断側面図である。It is a partial vertical side view before installation of the eaves member which shows one Embodiment of the cylinder for box-shaped roofs of this invention. 従来例を示す側面図である。It is a side view which shows a prior art example. 地下構造物の構築方法の前半工程を示す側面図である。It is a side view which shows the first half process of the construction method of an underground structure. 地下構造物の構築方法の後半工程を示す側面図である。It is a side view which shows the latter half process of the construction method of an underground structure. 箱形ルーフ用筒体のたわみを示す説明図である。It is explanatory drawing which shows the bending of the cylinder for box-shaped roofs. 箱形ルーフ用筒体の斜視図である。It is a perspective view of the cylinder for box-shaped roofs.
1…上部交通 2…土留め鋼矢板
3…発進坑 4…到達坑
5…圧入機 6…箱形ルーフ用筒体
6a、6b…継手 6c…継手フランジ
6d…箱抜き
7…フリクションカッター 8…反力壁
9…地下構造物 10…推進ジャッキ
11…刃口 12…小ジャッキ
13…支持材 14…止め部材
15…受台 16…ストラット
17a、17b…索条 18…ローラ
19…ボルト、ナット 20…スリットレール
21…スリット 22…逆T字形閂部材
22a…頭部平板 22b…立板部
DESCRIPTION OF SYMBOLS 1 ... Upper traffic 2 ... Earth retaining steel sheet pile 3 ... Starting pit 4 ... Arrival pit 5 ... Press fitting machine 6 ... Box-shaped roof cylinder 6a, 6b ... Joint 6c ... Joint flange 6d ... Box opening 7 ... Friction cutter 8 ... Anti Force wall 9 ... Underground structure 10 ... Propulsion jack 11 ... Blade 12 ... Small jack 13 ... Support material 14 ... Stopping member 15 ... Reception 16 ... Struts 17a, 17b ... Rope 18 ... Roller 19 ... Bolt, nut 20 ... Slit rail 21 ... Slit 22 ... Inverted T-shaped flange member 22a ... Head flat plate 22b ... Standing plate portion

Claims (3)

  1. ボルト接合用の継手フランジを端部に設け、端部隅角を外向き開放の箱抜きとした略矩形断面鋼管の箱形ルーフ用筒体であり、筒体端部の下側辺にスリットレールを閂挿入用金具として筒体長さ方向に向けて設け、このスリットレールに逆T字形閂部材の頭部平板を嵌め込むことを特徴とした箱形ルーフ用筒体。   This is a box-shaped roof tubular body with a substantially rectangular cross-section steel pipe with a joint flange for bolt connection at the end and a box corner with an open end corner that opens outward, and a slit rail on the lower side of the end of the cylinder Is provided in the length direction of the cylinder as a metal fitting for hook insertion, and the head flat plate of the inverted T-shaped hook member is fitted into the slit rail.
  2. 逆T字形閂部材の頭部平板に直交してなる立板部はこれを取手として使用する請求項1記載の箱形ルーフ用筒体。   2. A box-shaped roof tubular body according to claim 1, wherein the upright plate portion orthogonal to the head flat plate of the inverted T-shaped saddle member is used as a handle.
  3. スリットレールは間隔を存して並列させる請求項1または請求項2に記載の箱形ルーフ用筒体。   The box-shaped roof cylinder according to claim 1 or 2, wherein the slit rails are arranged in parallel at a distance.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528615U (en) * 1978-08-09 1980-02-25
JPH0247287U (en) * 1988-09-22 1990-03-30
JPH09287383A (en) * 1996-04-19 1997-11-04 Makoto Uemura Cylinder body for box-shaped roof
JPH09287389A (en) * 1996-04-19 1997-11-04 Makoto Uemura Constructing method of subsurface structure
JP2000352296A (en) * 1999-06-11 2000-12-19 Maeda Corp Method o constructing passage just under underground structure
JP3702265B2 (en) * 2002-10-25 2005-10-05 誠 植村 Roof subsidence prevention apparatus and subsidence prevention method in construction method of underground structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528615U (en) * 1978-08-09 1980-02-25
JPH0247287U (en) * 1988-09-22 1990-03-30
JPH09287383A (en) * 1996-04-19 1997-11-04 Makoto Uemura Cylinder body for box-shaped roof
JPH09287389A (en) * 1996-04-19 1997-11-04 Makoto Uemura Constructing method of subsurface structure
JP2000352296A (en) * 1999-06-11 2000-12-19 Maeda Corp Method o constructing passage just under underground structure
JP3702265B2 (en) * 2002-10-25 2005-10-05 誠 植村 Roof subsidence prevention apparatus and subsidence prevention method in construction method of underground structure

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