JP5655209B2 - Tunnel ceiling structure - Google Patents

Tunnel ceiling structure Download PDF

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JP5655209B2
JP5655209B2 JP2012274715A JP2012274715A JP5655209B2 JP 5655209 B2 JP5655209 B2 JP 5655209B2 JP 2012274715 A JP2012274715 A JP 2012274715A JP 2012274715 A JP2012274715 A JP 2012274715A JP 5655209 B2 JP5655209 B2 JP 5655209B2
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tunnel
ceiling
ceiling plate
ceiling structure
inspection
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JP2014118742A (en
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房夫 坂野
房夫 坂野
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房夫 坂野
房夫 坂野
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Description

本発明はトンネル内の自動車排ガスを排気することができる換気洞を形成したトンネルの天井構造に関するものである。   The present invention relates to a ceiling structure of a tunnel in which a ventilation cave capable of exhausting automobile exhaust gas in the tunnel is formed.

トンネルの上部を天井板で仕切り、トンネル上部と天井板間に換気洞を形成したものがある(例えば、特許文献1参照)。   There is one in which the upper part of the tunnel is partitioned by a ceiling plate and a ventilation cave is formed between the upper part of the tunnel and the ceiling plate (for example, see Patent Document 1).

特許文献1の天井板は波形に折り曲げて強度を高めた金属製のものとして、トンネルの上部に水平に張設し、天井板の両端をトンネルの側壁に固定している。   The ceiling board of Patent Document 1 is made of metal which is bent into a corrugated shape to increase the strength, and is stretched horizontally on the upper part of the tunnel, and both ends of the ceiling board are fixed to the side walls of the tunnel.

しかし、天井板は普通コンクリートで製作され、天井板を2枚連結したものを水平に張設している。しかし、天井板に要求される強度上、極めて厚く重量が1トンを超えるものとなる。このため、側壁に基端を固定した天井板の先端連結部をトンネル頂部と吊金具で繋いで荷重を受けるようにしている。ところが、経年変化によりコンクリートが劣化して吊金具のボルトが抜け落ちたり、地下水によりボルトが腐食して強度が低下したりすると、天井板の荷重を支えることができず天井板が落下するという問題がある。また、吊金具の点検作業は、暗く排ガスが充満する換気洞内で行わねばならず、点検が不十分となりやすいという問題がある。   However, the ceiling board is made of ordinary concrete, and two ceiling boards are connected horizontally. However, due to the strength required for the ceiling panel, it is extremely thick and the weight exceeds 1 ton. For this reason, the tip connection part of the ceiling board which fixed the base end to the side wall is connected with the tunnel top part and the hanging metal fitting so as to receive the load. However, if concrete deteriorates due to secular change and the bolts of the hanging brackets fall off, or if the bolts corrode due to groundwater and the strength decreases, the ceiling board load cannot be supported and the ceiling board falls. is there. In addition, the inspection work of the hanging bracket has to be performed in a ventilation cavity that is dark and filled with exhaust gas, and there is a problem that the inspection tends to be insufficient.

特開2005−36459号公報JP 2005-36459 A

本発明は天井板の落下を確実に防止することができるうえに、点検が容易なトンネルの天井構造を提供することを目的とするものである。   SUMMARY OF THE INVENTION An object of the present invention is to provide a tunnel ceiling structure that can reliably prevent a ceiling plate from falling and can be easily inspected.

本発明は、トンネルの上部に天井板を設けて換気洞を形成するトンネルの天井構造において、トンネルの側壁に下側の基端を固定し、中央に向って上向き傾斜される左右の天井板の上部先端を連結したことを特徴とするトンネルの天井構造である。 The present invention relates to a tunnel ceiling structure in which a ceiling plate is provided at the upper part of a tunnel to form a ventilation cavity, and a lower base end is fixed to a side wall of the tunnel and left and right ceiling plates are inclined upward toward the center . A tunnel ceiling structure characterized by connecting upper ends.

なお、天井板の先端を突き合わせたり、天井板の連結部とトンネルの頂壁とを吊金具により連繋したりしてもよい。   The tip of the ceiling plate may be abutted, or the connecting portion of the ceiling plate and the top wall of the tunnel may be connected by a hanging metal fitting.

本発明は、トンネルの上部に天井板を設けて換気洞を形成するトンネルの天井構造において、トンネルの側壁に下側の基端を固定し、中央に向って上向き傾斜される左右の天井板の上部先端を連結したことにより、天井板の荷重は略天井板の下側の基端とトンネル側壁との取付部に加わることとなる。このため、従来のコンクリート製の天井板のように、先端連結部をトンネルの頂壁に吊金具などを用いて連繋する必要がない。このため狭い換気洞内での作業が不要となり、施工期間を短縮できるうえに、施工費用も低減できることとなる。しかも、最も荷重がかかる重要な点検個所は低所で目視ができるうえに照明もあるトンネルの側壁であるため、り、点検作業が容易、且つ確実に点検を実施できる。さらに、天井板の連結箇所は高所であるがかかる荷重が小さいので点検タイミングを長くすることができるうえに、点検をトンネル内からできるので作業も容易となる。 The present invention relates to a tunnel ceiling structure in which a ceiling plate is provided at the upper part of a tunnel to form a ventilation cavity, and a lower base end is fixed to a side wall of the tunnel and left and right ceiling plates are inclined upward toward the center . By connecting the upper ends, the load on the ceiling plate is applied to the attachment portion between the base end on the lower side of the ceiling plate and the tunnel side wall. For this reason, unlike the conventional concrete ceiling board, it is not necessary to connect the front-end | tip connection part to the top wall of a tunnel using a hanging metal fitting. For this reason, the work in the narrow ventilation tunnel is not required, and the construction period can be shortened and the construction cost can be reduced. In addition, the most important inspection place where the load is applied is the side wall of the tunnel which can be visually observed at a low place and also has illumination, so that the inspection work can be performed easily and reliably. Furthermore, although the connection place of the ceiling plate is high, the load applied is small, so that the inspection timing can be lengthened, and the inspection can be performed from inside the tunnel, so that the work becomes easy.

請求項2のように、天井板の先端を突き合わせたことにより、荷重は左右の天井板の連結箇所だけでなく、天井板の突き合わせ面でも受けることとなるので、耐震性が増しより的確に天井板の落下事故を防止することができる。   Since the top end of the ceiling plate is abutted as in claim 2, the load is received not only at the connecting portion of the left and right ceiling plates but also at the abutting surface of the ceiling plate, so that the earthquake resistance is increased and the ceiling is more accurately A board fall accident can be prevented.

請求項3のように、天井板の突き合わせ連結部とトンネルの頂壁とを吊金具により連繋したことにより、地震等により、左右の天井板が中間部で折損した場合でも、天井板全体が落下することを防止できるので安全性がより高いものとなる。   By connecting the butt connecting part of the ceiling plate and the top wall of the tunnel with the hanging bracket as in claim 3, even if the left and right ceiling plates break at the middle part due to an earthquake or the like, the entire ceiling plate falls. Since it can prevent, it becomes a safer thing.

本発明の第1の実施形態を示す断面図である。It is sectional drawing which shows the 1st Embodiment of this invention. 同じく要部の拡大断面図である。Similarly it is an expanded sectional view of an important section. 第2の実施形態を示す要部の拡大断面図である。It is an expanded sectional view of the important section showing a 2nd embodiment. 第3の実施形態を示す要部の拡大断面図である。It is an expanded sectional view of the important section showing a 3rd embodiment.

次に、本発明の第1の実施形態を図1、2に基づいて詳細に説明する。
1はトンネルであり、該トンネル1の上部には左右の天井板2で仕切られた換気洞3が形成されている。4は土台5に形成される排水管、6は路面である。
Next, a first embodiment of the present invention will be described in detail with reference to FIGS.
Reference numeral 1 denotes a tunnel, and a ventilation cave 3 partitioned by left and right ceiling plates 2 is formed at the top of the tunnel 1. 4 is a drain pipe formed on the base 5, and 6 is a road surface.

7は天井板2、2の下側の基端をトンネル側壁に固定する取付金具、8は左右の天井板2の上部先端を連結する連結金具である。なお、第1の実施形態では図2に示すように、天井板2の先端は突き合わせ状態として、連結金具8だけではなく天井板2の先端突き合わせ面を密接させて天井板2の荷重を受けるようにして、連結金具8にかかる荷重を低減しているが、図3に示す第2の実施形態のように、天井板2の先端を突き合わせず間隙2aを有するものとしてもよい。こうすることにより、地震等による振動により天井板2同士がぶつかり合って天井板2に圧縮応力が繰り返し作用して疲労破壊を起こすことを防止できる。 Reference numeral 7 denotes a mounting bracket for fixing the lower base ends of the ceiling plates 2 and 2 to the tunnel side wall, and reference numeral 8 denotes a connecting bracket for connecting the upper ends of the left and right ceiling plates 2. In the first embodiment, as shown in FIG. 2, the tip of the ceiling plate 2 is in a butted state so that not only the connecting fitting 8 but also the tip butting surface of the ceiling plate 2 is brought into close contact with the load of the ceiling plate 2. Thus, although the load applied to the connection fitting 8 is reduced, it is also possible to have a gap 2a without abutting the tip of the ceiling plate 2 as in the second embodiment shown in FIG. By doing so, it is possible to prevent the ceiling plates 2 from colliding with each other due to vibration caused by an earthquake or the like, and the compressive stress acting on the ceiling plates 2 repeatedly to cause fatigue failure.

このようなトンネル1は、トラス構造状に組み合わされた左右の天井板2を並設してゆくことにより上部を仕切り換気洞3を形成し、該換気洞3を通じて通行する自動車の排ガスは排気され、新鮮な外気を取り込むことができる。   In such a tunnel 1, left and right ceiling plates 2 combined in a truss structure are arranged side by side to partition the upper part to form a ventilation cave 3, and the exhaust gas of the automobile passing through the ventilation cave 3 is exhausted. Can take in fresh outside air.

また、左右の天井板2は中央に向って上向き傾斜されて、上部先端を突き合わせた連結したものとしているので、天井板2の荷重の大半は天井板2の基端とトンネル1の側壁とを固定する取付金具7に加わることとなるので、左右一対の天井板2の中央を支える必要はない。 In addition, since the left and right ceiling panels 2 are inclined upward toward the center and connected with the top ends thereof butted together, most of the load on the ceiling panel 2 is between the base end of the ceiling panel 2 and the side wall of the tunnel 1. Since it is added to the mounting bracket 7 to be fixed, it is not necessary to support the center of the pair of left and right ceiling plates 2.

このため、トンネル1の側壁の取付金具7のボルトを重点的に目視や打音検査を行えばよい。しかもこの点検作業は、トンネル1内の低所で、照明された環境下で行うため作業員の負担が少なく、確実に点検を行うことができる。また、比較的荷重のかからない連結金具8の通常の検査は遠望目視検査を行い。一定期間ごと目視または打音検査を行うものとする。   For this reason, what is necessary is just to perform visual observation or a hammering test | inspection focusing on the bolt of the attachment metal fitting 7 of the side wall of the tunnel 1. FIG. Moreover, since this inspection work is performed at a low place in the tunnel 1 in an illuminated environment, the burden on the operator is small and the inspection can be performed reliably. In addition, a normal inspection of the connecting metal fitting 8 that is relatively unloaded is a telescopic visual inspection. Visual inspection or hammering inspection shall be performed at regular intervals.

第3の実施形態は図4に示すように、天井板2の上部先端を連結する連結金具8を吊金具9を介してトンネル1の頂壁に連繋するものである。吊金具9は連結金具8に固着される支柱9aと、トンネル1の頂壁に取付けた2本のIボルト9bと、支柱9aとIボルト9bとを結ぶワイヤ9cとからなる。吊金具9により、天井板2の中央を吊下げることにより、天井板2が折損した場合、天井板2の全面的な落下を防止でき、より安全なものとなる。 In the third embodiment, as shown in FIG. 4, a connecting fitting 8 that connects the upper ends of the ceiling plate 2 is connected to the top wall of the tunnel 1 via a hanging fitting 9. The hanging metal fitting 9 is composed of a support post 9a fixed to the connection fitting 8, two I bolts 9b attached to the top wall of the tunnel 1, and a wire 9c connecting the support post 9a and the I bolt 9b. When the ceiling panel 2 is broken by suspending the center of the ceiling panel 2 with the hanging metal fitting 9, it is possible to prevent the entire ceiling panel 2 from falling and to make it safer.

1 トンネル
2 天井板
2a 間隙
3 換気洞
4 排水管
5 土台
6 路面
7 取付金具
8 連結金具
9 吊金具
9a 支柱
9b Iボルト
9c ワイヤ
1 tunnel 2 ceiling plate
2a Gap 3 Ventilation cavity 4 Drain pipe 5 Base 6 Road surface 7 Mounting bracket 8 Connecting bracket 9 Suspension bracket
9a prop
9b I bolt
9c wire

Claims (3)

トンネルの上部に天井板を設けて換気洞を形成するトンネルの天井構造において、トンネルの側壁に下側の基端を固定し、中央に向って上向き傾斜される左右の天井板の上部先端を連結したことを特徴とするトンネルの天井構造。 In the ceiling structure of the tunnel forming the ventilation sinus provided ceiling plate on top of the tunnel, the lower side of the base end is fixed to the side wall of the tunnel, connecting the upper tip of the left and right ceiling plate that is upwardly inclined toward the center A tunnel ceiling structure characterized by 天井板の先端を突き合わせたことを特徴とする請求項1に記載のトンネルの天井構造。   The tunnel ceiling structure according to claim 1, wherein the top ends of the ceiling plates are abutted against each other. 天井板の連結部とトンネルの頂壁とを吊金具により連繋したことを特徴とする請求項1または2に記載のトンネルの天井構造。   The tunnel ceiling structure according to claim 1 or 2, wherein the connecting portion of the ceiling plate and the top wall of the tunnel are connected by a hanging metal fitting.
JP2012274715A 2012-12-17 2012-12-17 Tunnel ceiling structure Expired - Fee Related JP5655209B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2016065381A (en) * 2014-09-24 2016-04-28 株式会社ドクター中松創研 Structure of tunnel

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JPS6136640Y2 (en) * 1981-02-25 1986-10-23
JPS6080700A (en) * 1983-10-12 1985-05-08 松下精工株式会社 Smoke exhaust apparatus for tunnel
JPH10184289A (en) * 1996-12-26 1998-07-14 Kyoritsu Kagaku Sangyo Kk Wall-surface structure of tunnel
JPH1122400A (en) * 1997-06-30 1999-01-26 Yamauchi Kogyo Kk Working device of tunnel work

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