JPH08135382A - Impact relaxation device of tunnel entrance - Google Patents

Impact relaxation device of tunnel entrance

Info

Publication number
JPH08135382A
JPH08135382A JP27960894A JP27960894A JPH08135382A JP H08135382 A JPH08135382 A JP H08135382A JP 27960894 A JP27960894 A JP 27960894A JP 27960894 A JP27960894 A JP 27960894A JP H08135382 A JPH08135382 A JP H08135382A
Authority
JP
Japan
Prior art keywords
tunnel
train
entrance
main body
reserve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27960894A
Other languages
Japanese (ja)
Inventor
Takanori Okada
貴憲 岡田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP27960894A priority Critical patent/JPH08135382A/en
Publication of JPH08135382A publication Critical patent/JPH08135382A/en
Pending legal-status Critical Current

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  • Lining And Supports For Tunnels (AREA)

Abstract

PURPOSE: To relax sufficiently an impact generated when a train enters in a tunnel, by installing a reserve tunnel at the entrance of the tunnel, and forming the reserve tunnel to widen the section area gradually as going from the connection at the inner side of the tunnel to the opening end. CONSTITUTION: At the opening end 6 side of the entrance part of a reserve tunnel 4, the section area of the reserve tunnel is made the maximum, and the majority of the air operating to a train when the train enters to the entrance at a high speed is exhausted to the outer side through a space around the train. As a result, an impact pressure applying to the train can be prevented. And the section area of the reserve tunnel 4 is made the smaller gradually as going to the inner side of the tunnel 4, and finally the section area is made equal to that of the main body part 3. Consequently, during the time when the train advances to the inner side of the entrance part, and is going to enter to the main body part 3, the pressure operating to the train is raised gradually up to the level corresponding to the pressure in the main body part 3, so as to prevent the generation of a large impact when the train enters to the tunnel 3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、高速鉄道などにおいて
利用されるトンネル入口の衝撃緩和装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a tunnel entrance used in high-speed railways.

【0002】[0002]

【従来の技術】新幹線に代表される高速鉄道が敷設され
かつ営業されているが、この高速鉄道においては、従来
の鉄道と同程度あるいはそれ以上の部分においてトンネ
ルが設置されている。
2. Description of the Related Art A high-speed railway represented by the Shinkansen is laid and is in operation. In this high-speed railway, tunnels are installed in the same or more parts as the conventional railway.

【0003】[0003]

【発明が解決しようとする課題】しかし、高速鉄道にお
いて列車がトンネルに入るときには、トンネル内に静止
状態で存在する空気が壁のように作用して圧力が急激に
上昇することが原因して、列車が相当な衝撃を受けると
いう問題点がある。とりわけ、複線の路線において対向
する列車が同時にトンネル内に入るときの衝撃が特に大
きいという問題点がある。
However, when a train enters a tunnel in a high-speed railway, the air existing in a static state in the tunnel acts like a wall and the pressure rises sharply. There is a problem that the train receives a considerable shock. In particular, there is a problem that when two trains facing each other on a double-track line enter the tunnel at the same time, the impact is particularly great.

【0004】そこで本発明はこのような問題点を解決
し、この種の高速鉄道において列車がトンネルに入ると
きに発生する衝撃を十分に緩和できるようにすることを
目的とする。
Therefore, an object of the present invention is to solve such a problem and to sufficiently reduce the shock generated when a train enters a tunnel in this type of high-speed railway.

【0005】[0005]

【課題を解決するための手段】この目的を達成するため
本発明は、トンネルの入口部分を、トンネル奥側から開
口端側に向かうにつれて徐々に横断面積が大きくなるよ
うに形成したものである。
In order to achieve this object, the present invention is one in which the entrance portion of a tunnel is formed so that the cross-sectional area gradually increases from the tunnel back side toward the opening end side.

【0006】[0006]

【作用】このような構成によれば、トンネルの入口部分
の開口端側では、その横断面積が最大になっているた
め、列車が高速でこの入口部分に入るときには、この列
車に作用しようとする空気の大半が列車の周囲の空間を
通ってトンネル外へ排出され、このためこの列車に衝撃
的に圧力が作用することが防止される。そして、トンネ
ルの入口部分は、奥側に向かうにつれて徐々に横断面積
が小さくなって、遂にはトンネルの本体部分と同じ横断
面積になるため、列車が入口部分の奥側まで進行して本
体部分に入ろうとするまでの間に、この列車に作用する
圧力はこの本体部分での圧力に対応する程度まで徐々に
上昇する。このように作用圧力が徐々に上昇すること
で、列車がトンネルに入るときに大きな衝撃が発生する
ことが防止される。この衝撃の抑制効果は、特に対向す
る列車が複線構造のトンネルに同時に入るときなどにお
いて顕著に現れる。
According to this structure, the cross-sectional area of the opening end side of the entrance portion of the tunnel is the maximum, so when the train enters this entrance portion at a high speed, it tries to act on this train. Most of the air is exhausted through the space around the train and out of the tunnel, which prevents the train from being shocked by pressure. The cross-sectional area of the entrance part of the tunnel gradually decreases toward the back side, and finally the cross-sectional area becomes the same as the main part of the tunnel, so the train advances to the back side of the entrance part and reaches the main part. By the time it is about to enter, the pressure acting on the train gradually rises to the extent that it corresponds to the pressure at the body. By gradually increasing the working pressure in this way, it is possible to prevent a large impact from occurring when the train enters the tunnel. The effect of suppressing the impact becomes remarkable especially when the opposite trains enter the tunnel of the double track structure at the same time.

【0007】[0007]

【実施例】図1において、1は高速鉄道の線路であり、
山岳部2などにおいては従来と同様のトンネルが設置さ
れている。3はこのトンネルの本体部分である。このト
ンネルの本体部分3に連続して、トンネルの入口部分を
構成する予備トンネル4が形成されている。この予備ト
ンネル4は、コンクリート材や鋼材などの適当な材料で
所定の厚さに形成されるとともに、その外周が山岳部2
の土砂などに覆われずに、本体部分3から外側へ突出す
るように設置されている。
EXAMPLE In FIG. 1, reference numeral 1 is a high-speed railway line,
A tunnel similar to the conventional one is installed in the mountainous area 2 and the like. 3 is the main body of this tunnel. A spare tunnel 4 forming an entrance portion of the tunnel is formed continuously with the body portion 3 of the tunnel. The spare tunnel 4 is made of an appropriate material such as concrete or steel to have a predetermined thickness, and the outer circumference thereof is the mountain portion 2
It is installed so as to project outward from the main body portion 3 without being covered with the earth and sand.

【0008】この予備トンネル4は、その奥側における
本体部分3との接続部5では、この本体部分3と同一の
横断面形状となるように形成されている。そして、この
奥側の接続部5から開口端部6に向かうにつれて徐々に
横断面積が大きくなるようにテーパ状に形成されてい
る。
The spare tunnel 4 is formed so that the connecting portion 5 with the main body portion 3 on the inner side thereof has the same cross-sectional shape as the main body portion 3. Then, the tapered shape is formed such that the cross-sectional area gradually increases from the inner connection portion 5 toward the opening end portion 6.

【0009】このような構成によれば、予備トンネル4
の開口端部6では、列車7の横断面積に比べ予備トンネ
ル4の横断面積の方が格段に大きくなる。このため、列
車7が高速でこの予備トンネル4に入るときには、この
列車7に作用しようとする空気8の大半が、予備トンネ
ル4の内面と列車7との間の空間を通って、予備トンネ
ル4の外へ排出される。その結果、この列車7に衝撃的
に圧力が作用することが防止される。
According to such a configuration, the spare tunnel 4
At the opening end 6 of the, the cross-sectional area of the spare tunnel 4 is significantly larger than the cross-sectional area of the train 7. Therefore, when the train 7 enters the spare tunnel 4 at a high speed, most of the air 8 that is going to act on the train 7 passes through the space between the inner surface of the spare tunnel 4 and the train 7 and Is discharged to the outside. As a result, the pressure on the train 7 is prevented from being shocked.

【0010】そして、予備トンネル4の開口端部6から
奥側の接続部5に向かうにつれてトンネル横断面積が徐
々に小さくなるため、列車7が接続部5まで進行して本
体部分3に入ろうとするまでの間に、この列車7に作用
する圧力は、この本体部分3内での圧力に対応する程度
まで徐々に上昇する。このように作用圧力が徐々に上昇
することで、列車7が本体部分3に入るときにも、大き
な衝撃が発生することが防止される。
Since the tunnel cross-sectional area gradually decreases from the opening end 6 of the spare tunnel 4 toward the connection portion 5 on the inner side, the train 7 travels to the connection portion 5 and tries to enter the main body portion 3. In the meantime, the pressure acting on the train 7 gradually rises to an extent corresponding to the pressure in the body part 3. By gradually increasing the working pressure in this manner, a large impact is prevented from occurring even when the train 7 enters the main body portion 3.

【0011】この衝撃防止効果は、たとえば列車7が単
線構造のトンネルに入るときに効果的に現れるととも
に、図2に示すように対向する列車7が複線構造のトン
ネルに同時に入るときに特に顕著に現れる。
This impact-preventing effect effectively appears, for example, when the train 7 enters a single-track structure tunnel, and is particularly remarkable when the opposing trains 7 simultaneously enter a double-track structure tunnel as shown in FIG. appear.

【0012】なお、上記においては予備トンネル4が山
岳部2の外に設置されたものを図示して説明したが、こ
の予備トンネル4は、本体部分3と同様に山岳部2の土
砂の中に設置することもできる。
In the above description, the spare tunnel 4 is illustrated and described as being installed outside the mountain portion 2, but this spare tunnel 4 is, like the main body portion 3, in the earth and sand of the mountain portion 2. It can also be installed.

【0013】図3は、本発明の他の実施例を示す。図1
および図2の実施例では予備トンネル4をテーパ状に形
成したものを説明したが、ここでは、予備トンネル4
は、奥側の接続部5から開口端部6に向かうにつれて段
階的に横断面積が大きくなるように形成されている。こ
のように構成することによっても、同様に大きな衝撃の
発生を防止できる。
FIG. 3 shows another embodiment of the present invention. FIG.
In the embodiment shown in FIG. 2 and FIG. 2, the preliminary tunnel 4 is formed in a tapered shape, but here, the preliminary tunnel 4 is used.
Is formed such that the cross-sectional area thereof gradually increases from the rear connection portion 5 toward the opening end portion 6. With such a configuration, it is possible to prevent the occurrence of a large impact as well.

【0014】[0014]

【発明の効果】以上述べたように本発明によると、トン
ネルの入口部分を、トンネル奥側から開口端側に向かう
につれて徐々に横断面積が大きくなるように形成したた
め、列車が高速でこの入口部分に入るときには、この列
車に作用しようとする空気の大半を列車の周囲の空間を
通ってトンネル外へ排出することができ、このためこの
列車に衝撃的に圧力が作用することを確実に防止でき、
しかもトンネルの入口部分の奥側に向かうにつれて徐々
に横断面積が小さくなるように形成されているため、列
車が入口部分の奥側まで進行して本体部分に入ろうとす
るまでの間に、この列車に作用する圧力をこの本体部分
での圧力に対応する程度まで徐々に上昇させることがで
き、このため列車がトンネルに入るときに大きな衝撃が
発生することを確実に防止できる。
As described above, according to the present invention, since the entrance portion of the tunnel is formed so that the cross-sectional area gradually increases from the tunnel inner side toward the opening end side, the train can operate at high speed at this entrance portion. When entering, most of the air trying to act on this train can be expelled out of the tunnel through the space around the train, thus ensuring that the train is not shocked by pressure. ,
Moreover, since the cross-sectional area is gradually reduced toward the inner side of the entrance of the tunnel, the train will reach the inner side of the entrance until it is about to enter the main body. It is possible to gradually increase the pressure acting on the pressure to a level corresponding to the pressure in the main body portion, so that it is possible to reliably prevent a large impact from occurring when the train enters the tunnel.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例のトンネル入口の衝撃緩和装
置の概略構成図である。
FIG. 1 is a schematic configuration diagram of a shock absorbing device at a tunnel entrance according to an embodiment of the present invention.

【図2】同装置の概略側面図である。FIG. 2 is a schematic side view of the device.

【図3】本発明の他の実施例のトンネル入口の衝撃緩和
装置の概略構成図である。
FIG. 3 is a schematic configuration diagram of an impact absorbing device at a tunnel entrance according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

4 予備トンネル 5 接続部分 6 開口端部 4 Spare tunnel 5 Connection part 6 Open end

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 トンネルの入口部分を、トンネル奥側か
ら開口端側に向かうにつれて徐々に横断面積が大きくな
るように形成したことを特徴とするトンネル入口の衝撃
緩和装置。
1. An impact mitigation device for a tunnel entrance, wherein an entrance portion of the tunnel is formed such that a cross-sectional area thereof gradually increases from a tunnel inner side toward an opening end side.
JP27960894A 1994-11-15 1994-11-15 Impact relaxation device of tunnel entrance Pending JPH08135382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27960894A JPH08135382A (en) 1994-11-15 1994-11-15 Impact relaxation device of tunnel entrance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27960894A JPH08135382A (en) 1994-11-15 1994-11-15 Impact relaxation device of tunnel entrance

Publications (1)

Publication Number Publication Date
JPH08135382A true JPH08135382A (en) 1996-05-28

Family

ID=17613361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27960894A Pending JPH08135382A (en) 1994-11-15 1994-11-15 Impact relaxation device of tunnel entrance

Country Status (1)

Country Link
JP (1) JPH08135382A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008019668A (en) * 2006-07-14 2008-01-31 East Japan Railway Co Tunnel buffer construction
CN102996140A (en) * 2012-12-14 2013-03-27 三一重型装备有限公司 Heading machine and body frame thereof
KR101360846B1 (en) * 2013-04-12 2014-02-12 한국철도기술연구원 Hood structure including hoods having different sections
CN110388217A (en) * 2019-06-17 2019-10-29 中铁二十一局集团第三工程有限公司 Big cross section soft-rock slope tunnel slope is into main tunnel ripping construction method
JP2020100943A (en) * 2018-12-19 2020-07-02 公益財団法人鉄道総合技術研究所 Micro pressure wave reducing structure of tunnel buffer construction
CN114183164A (en) * 2021-11-30 2022-03-15 中铁二院工程集团有限责任公司 Enlarged type voltage reduction buffer device for tunnel portal of high-speed railway and design method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340259A (en) * 1976-09-27 1978-04-12 Hitachi Ltd Mic solid oscillator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340259A (en) * 1976-09-27 1978-04-12 Hitachi Ltd Mic solid oscillator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008019668A (en) * 2006-07-14 2008-01-31 East Japan Railway Co Tunnel buffer construction
CN102996140A (en) * 2012-12-14 2013-03-27 三一重型装备有限公司 Heading machine and body frame thereof
KR101360846B1 (en) * 2013-04-12 2014-02-12 한국철도기술연구원 Hood structure including hoods having different sections
JP2020100943A (en) * 2018-12-19 2020-07-02 公益財団法人鉄道総合技術研究所 Micro pressure wave reducing structure of tunnel buffer construction
CN110388217A (en) * 2019-06-17 2019-10-29 中铁二十一局集团第三工程有限公司 Big cross section soft-rock slope tunnel slope is into main tunnel ripping construction method
CN114183164A (en) * 2021-11-30 2022-03-15 中铁二院工程集团有限责任公司 Enlarged type voltage reduction buffer device for tunnel portal of high-speed railway and design method

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