JP2009013627A - Protective device and construction method for widening tunnel - Google Patents

Protective device and construction method for widening tunnel Download PDF

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JP2009013627A
JP2009013627A JP2007175096A JP2007175096A JP2009013627A JP 2009013627 A JP2009013627 A JP 2009013627A JP 2007175096 A JP2007175096 A JP 2007175096A JP 2007175096 A JP2007175096 A JP 2007175096A JP 2009013627 A JP2009013627 A JP 2009013627A
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strength
protector
widening
low
tunnel
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JP4938569B2 (en
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Katsumi Kurihara
栗原勝美
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Taisei Corp
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Taisei Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method, which enable a passenger or a vehicle to safely pass through a tunnel even during the widening of the existing tunnel. <P>SOLUTION: A high-strength protector with strength high enough to bear a rock fall, and a low-strength protector which does not give consideration to strength are used. The high-strength protector is a short passage which surrounds an upper section and a wall surface and covers only a widened and bored place of the tunnel. The low-strength protector is a short passage which surrounds an upper section and a wall surface and has a length equivalent to the approximately overall length of the tunnel. The high-strength protector is arranged astride the outer periphery of the low-strength protector. The high-strength protector is advanced accompanied by the advance of the widened and bored place of the tunnel. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、トンネル拡幅防護装置と工法に関するものである。   The present invention relates to a tunnel widening protection device and a construction method.

交通量の増加などで、既設のトンネルを拡幅する場合がある。
その場合の拡幅方法としては、既設トンネルの中心から左右対称に相似形に広げてゆく方法もあるが、用地の関係で偏心した状態、例えば右半分のみを膨張させる状態で拡幅する場合がある。
いずれの場合でも、拡幅中では掘削した岩塊などが落下してくるから、拡幅掘削中の落石などから通行人や車両をいかに保護するかが問題となる。
そのようなトンネル拡幅防護方法として例えば、通行用のプロテクタの外周に作業台を、またがるように設置し、拡幅作業場所の前進とともに作業台を前進させるような工法が知られている。
なお、以下の記載では「通行人」と記載する場合があるが、煩雑を避けるためであり、「人」だけに限らず「車両」なども含む意味である。

特開2000−328871号公報。 特開2003−239676号公報。
Existing traffic may be widened due to increased traffic.
As a widening method in that case, there is a method in which the center of the existing tunnel is expanded symmetrically in a symmetrical manner, but there is a case where the width is widened in an eccentric state due to the site, for example, in a state where only the right half is expanded.
In either case, the excavated rock blocks fall during widening, so how to protect passersby and vehicles from falling rocks during widening excavation becomes a problem.
As such a tunnel widening protection method, for example, a construction method is known in which a work table is installed so as to straddle the outer periphery of a protector for passage, and the work table is advanced along with the advancement of the widening work place.
In addition, although it may describe as a "passerby" in the following description, it is for the purpose of avoiding complexity, and means not only "person" but also "vehicle".

JP 2000-328871 A. JP2003-239676A.

既設のトンネルを拡幅する拡幅作業を分析してみると、掘削作業以外に、モルタルの吹きつけ、鉄筋組み立て、型枠の組み立て、型枠の解体、運搬などの多くの一連の作業が継続する。
しかし通行人に対して直接危害を与える可能性のある作業は拡幅のために既設トンネルの天井や壁部分の岩盤を掘削する工程であり、この工程では掘削した岩塊が落下してきたり、跳ね返ってくる可能性がある。
本発明はそのような工程の分析をもとに、特に危険な掘削作業と、比較的安全度の高い他の作業とは通行人の保護の程度が異なるはずである、という新たな着想のもとになされたものである。
前記したような従来のトンネル拡幅防護装置は、本発明のような着想がないことから、プロテクタの外周に位置するのは「作業台車」や「作業架台」であって、プロテクタの機能を達成するものは存在しない。
また、作業台車だけをプロテクタと分離して、これを新たなプロテクタとして使用するという意図は存在しない。
Analyzing the widening work to widen the existing tunnel, in addition to excavation work, many series of work such as mortar spraying, rebar assembly, formwork assembly, formwork dismantling and transportation continue.
However, the work that may cause direct harm to passers-by is the process of excavating the ceiling of the existing tunnel and the bedrock of the wall for widening. In this process, the excavated rock mass falls or rebounds. There is a possibility of coming.
Based on the analysis of such a process, the present invention has a new idea that the degree of protection of passers-by should be different between particularly dangerous excavation work and other work with relatively high safety. It was made.
Since the conventional tunnel widening protection device as described above has no idea as in the present invention, it is the “work carriage” or “work platform” located on the outer periphery of the protector, and achieves the function of the protector. There is nothing.
Moreover, there is no intention of separating only the work carriage from the protector and using it as a new protector.

上記のような課題を解決するために、本発明のトンネル拡幅防護装置は、石に耐える強度を持つ高強度プロテクタと、強度を考慮しない低強度プロテクタとで構成し、高強度プロテクタは、上部と壁面を囲った通路であって、トンネルの拡幅の掘削作業の範囲をカバーするものであり、かつ高強度プロテクタの壁面の下端には車輪を設け、低強度プロテクタは、上部と壁面を囲った通路であって、トンネルほぼ全長の長さを備えたものとして構成し、高強度プロテクタの壁面の高さは、低強度プロテクタの壁面の高さよりも高く構成し、低強度プロテクタの外周上に、高強度プロテクタをまたがらせて配置したことを特徴とするものである。
また、本発明のトンネルの拡幅方法は、拡幅するトンネルにおける通行人や車両の防護方法であって、前記のトンネル拡幅防護装置を使用し、拡幅掘削を行わない位置のトンネル全長に低強度プロテクタを設置し、拡幅掘削場所の範囲に、低強度プロテクタの外周にまたがった状態の高強度プロテクタを配置し、拡幅掘削場所では、通行人や車両は外側の高強度プロテクタと、内側の低強度プロテクタとによって二重に保護し、拡幅掘削場所以外では通行人や車両は低強度プロテクタのみによって保護し、拡幅掘削場所の前進とともに、高強度プロテクタだけを前進させ、拡幅掘削作業が終了したら、高強度プロテクタは撤去して回収し、残った低強度プロテクタを、拡幅掘削の終わった場所へ設置し、掘削以外の作業を継続する、トンネルの拡幅工法ことを特徴としたものである。
また、本発明のトンネルの拡幅方法は、一方向に偏って拡幅するトンネルにおける防護方法であって、前記の請求項1記載のトンネル拡幅防護装置を使用し、拡幅掘削を行わない側のトンネル全長に、低強度プロテクタを設置し、拡幅掘削場所の範囲に、低強度プロテクタの外周にまたがった状態の高強度プロテクタを配置し、拡幅掘削場所では、通行人や車両は外側の高強度プロテクタと、内側の低強度プロテクタとによって二重に保護し、拡幅掘削場所以外では通行人や車両は低強度プロテクタのみによって保護し、拡幅掘削場所の前進とともに、高強度プロテクタだけを前進させ、拡幅側の拡幅掘削が終了したら、高強度プロテクタは撤去して回収し、残った低強度プロテクタを、拡幅掘削の終わった側へ設置し、それまで高強度プロテクタと低強度プロテクタとが位置していた側のトンネルの作業を行う、トンネルの拡幅工法ことを特徴としたものである。
In order to solve the problems as described above, the tunnel widening protection device of the present invention is composed of a high-strength protector that can withstand stones and a low-strength protector that does not consider the strength. A passage that encloses the wall, covers the range of excavation work for widening the tunnel, and is provided with a wheel at the lower end of the wall of the high-strength protector, and the low-strength protector surrounds the upper and wall surfaces. The height of the wall of the high-strength protector is higher than the height of the wall of the low-strength protector, and the height of the wall of the high-strength protector is high on the outer periphery of the low-strength protector. The strength protector is arranged so as to straddle.
The tunnel widening method of the present invention is a method for protecting a passerby or a vehicle in a widening tunnel, and uses the tunnel widening protection device described above to provide a low-strength protector over the entire length of the tunnel where no widening excavation is performed. Install and place a high-strength protector that spans the outer circumference of the low-strength protector in the range of the widening excavation site, and at the widening excavation site, passers-by and vehicles are the outer high-strength protector and the inner low-strength protector. Double pass protection, and passers and vehicles are protected only by the low-strength protector outside the widening excavation site, and only the high-strength protector is advanced along with the advancement of the widening excavation site. Removed and recovered, and installed the remaining low-strength protector at the place where the widening excavation was completed, and continued work other than excavation. It is obtained and wherein the widening method.
The tunnel widening method according to the present invention is a protection method for a tunnel that is widened in one direction, and uses the tunnel widening protection device according to claim 1, and the entire tunnel length on the side where widening excavation is not performed. In addition, a low-strength protector is installed, and a high-strength protector in a state that spans the outer periphery of the low-strength protector is arranged in the range of the widening excavation site. Double protection by the inner low-strength protector. Passers and vehicles are protected only by the low-strength protector outside the widening excavation site, and only the high-strength protector is advanced as the widening excavation site advances. When the excavation is completed, the high-strength protector is removed and collected, and the remaining low-strength protector is installed on the side where the widening excavation has been completed. To work Kuta and side tunnels and low intensity protector is located, it is obtained and wherein the widening method of the tunnel.

本発明のトンネル拡幅防護装置と方法は以上説明したようになるから次のような効果を得ることができる。
<1> 既設のトンネルの拡幅作業において、その作業の危険の程度を区別して、その程度に応じて「高強度プロテクタ」と「低強度プロテクタ」を使い分ける技術である。
<2> 落石に十分対抗できる強度の高い高強度プロテクタは高価である。そのような高価な鋼製構造物をトンネルの全長にわったって配置する必要がなく、特に落石などの危険の多い拡幅掘削場所の短い範囲だけに配置することができる。
<3> 危険の程度の一番高い、拡幅掘削場所では、通行人は外側の高強度プロテクタと、内側の低強度プロテクタとによって二重に保護されていることになり、きわめて安全である。
Since the tunnel widening protection device and method of the present invention are as described above, the following effects can be obtained.
<1> In the existing tunnel widening work, the degree of danger of the work is distinguished, and “high-strength protector” and “low-strength protector” are selectively used according to the degree.
<2> A high-strength protector with high strength that can sufficiently resist falling rocks is expensive. Such expensive steel structures do not need to be arranged over the entire length of the tunnel, and can be arranged only in a short range of widening excavation sites that are particularly dangerous, such as falling rocks.
<3> At the widest excavation site with the highest degree of danger, the passerby is double protected by the outer high-strength protector and the inner low-strength protector, which is extremely safe.

以下図面を参照にしながら本発明の好適な実施の形態を詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

<1>全体の構成。
本発明の装置は、「高強度プロテクタ」1と「低強度プロテクタ」2との組み合わせによって構成する。
ただし高強度、低強度といっても、後述するように相対的なものであり、絶対的なものではない。
<1> Overall configuration.
The apparatus of the present invention is constituted by a combination of a “high strength protector” 1 and a “low strength protector” 2.
However, high strength and low strength are relative as described later and are not absolute.

<2>高強度プロテクタ。
高強度プロテクタ1とは掘削場所における岩塊の落石に対してその付近を通過する人や車両を保護することを目的としたプロテクタである。
したがってその目的に応じた強度を持った構造物となる。
具体的には通路の天井に当たる天井部と、両側の壁部とによって門型に形成した、強度を備えた通路である。
そして壁部の下端には車輪11を設ける。
この車輪11は、トンネルの床上に設けたレール12に搭載してトンネル内部を走行が可能である。
ただしタイヤや無限軌道のような走行装置を設けても同様の機能を達成できる。
この高強度プロテクタ1は、トンネルの全長に応じた長さのものを使用するのではなく、拡幅の掘削作業の範囲だけをカバーする短いものとして構成する。
このように製造価格の高額な、高強度のプロテクタを短いものとすることによって全体の価格を低く抑えることができる。
<2> High strength protector.
The high-strength protector 1 is a protector for the purpose of protecting a person or a vehicle passing through a rock fall at a digging site.
Therefore, it becomes a structure having strength according to the purpose.
Specifically, it is a passage having strength and formed in a gate shape by a ceiling portion that hits the ceiling of the passage and wall portions on both sides.
And the wheel 11 is provided in the lower end of a wall part.
The wheels 11 are mounted on rails 12 provided on the floor of the tunnel and can travel inside the tunnel.
However, the same function can be achieved even if a traveling device such as a tire or an endless track is provided.
This high-strength protector 1 is not used as a length corresponding to the entire length of the tunnel, but as a short one that covers only the range of wide excavation work.
Thus, the overall price can be kept low by shortening the high-strength protector having a high manufacturing price.

<3>低強度プロテクタ2。
低強度プロテクタ2は、特の岩石の落下の衝撃に耐える、といった大きな強度を考慮することのない、簡易な通路である。
この低強度プロテクタ2も、天井部と両側の壁面から構成した門型の通路であるが、特に低強度プロテクタ2は、ほぼトンネル全長の長さを備えたものとして構成する。
したがって通行人や車両は、拡幅部分の掘削の振動などを原因とした小さな落下物、剥離物、あるいは飛散した吹きつけモルタルなどから保護された状態で低強度プロテクタ2の内部を通って、トンネルを通過することができる。
低強度プロテクタ2の壁面や柱の高さは、高強度プロテクタ1の壁面や柱の高さよりも低く構成する。
また低強度プロテクタ2の両壁面間の幅は、高強度プロテクタ1のそれよりも狭い幅に構成する。
<3> Low strength protector 2.
The low-strength protector 2 is a simple passage that does not take into account such a great strength that it can withstand the impact of falling special rocks.
The low-strength protector 2 is also a gate-shaped passage composed of a ceiling portion and wall surfaces on both sides. In particular, the low-strength protector 2 is configured to have substantially the entire length of the tunnel.
Therefore, passers-by and vehicles pass through the tunnel inside the low-strength protector 2 while being protected from small fallen objects, peeled objects, or scattered sprayed mortar caused by vibrations from excavation of the widened part. Can pass through.
The height of the wall surface and pillar of the low strength protector 2 is configured to be lower than the height of the wall surface and pillar of the high strength protector 1.
The width between both wall surfaces of the low-strength protector 2 is configured to be narrower than that of the high-strength protector 1.

<4>両プロテクタの組み合わせ。
上記した構造の低強度プロテクタ2の上部の外周に、高強度プロテクタ1をまたがらせる。
上記したように、低強度プロテクタ2の壁面や柱の高さは、高強度プロテクタ1の壁面や柱の高さよりも低く、低強度プロテクタ2の幅は、高強度プロテクタ1の幅よりも狭いから、低強度プロテクタ2の外周を覆うような状態で、高強度プロテクタ1を設置することができる。
したがって高強度プロテクタ1の存在する位置では、通行人は高強度プロテクタ1と低強度プロテクタ2の二重のプロテクタによって確実に保護されて通行することになる。
<4> Combination of both protectors.
The high-strength protector 1 is straddled on the outer periphery of the upper part of the low-strength protector 2 having the above-described structure.
As described above, the height of the wall and pillar of the low-strength protector 2 is lower than the height of the wall and pillar of the high-strength protector 1, and the width of the low-strength protector 2 is narrower than the width of the high-strength protector 1. The high-strength protector 1 can be installed in a state that covers the outer periphery of the low-strength protector 2.
Therefore, in the position where the high-strength protector 1 exists, the passerby is protected by the double protector of the high-strength protector 1 and the low-strength protector 2 and passes.

<5>使用方法。
次に上記の装置の使用方法について説明する。
最初の実施例として、一方向に偏って拡幅するトンネルに使用する場合を説明する。
図2、3では、例えば既設のトンネルAにおいて、その右側の壁部分、天井部分の掘削部Cを掘削して全体を拡幅する場合を例に説明するが、その例に限定されるものではない。
<5> Usage method.
Next, a method of using the above apparatus will be described.
As a first embodiment, a case where the present invention is used for a tunnel widened in one direction will be described.
2 and 3, for example, in an existing tunnel A, a case where the entire wall is widened by excavating the excavation portion C on the right wall portion and the ceiling portion will be described, but the present invention is not limited to this example. .

<6>低強度プロテクタ2の設置。
拡幅掘削の振動などは、既設トンネルAの広い範囲に影響する。そのために既設トンネルAのどこかの位置で、コンクリートの剥離や落下などが生じる可能性もある。
そこで、拡幅しない左側に、既設トンネルAの全長にわたって低強度プロテクタ2を設置して、万一コンクリートなどが部分的に剥離、落下した場合でも通行人が災害を受けないように考慮する。
<6> Installation of the low strength protector 2.
The vibration of widening excavation affects a wide area of the existing tunnel A. Therefore, there is a possibility that the concrete may be peeled off or dropped at some position in the existing tunnel A.
Therefore, a low-strength protector 2 is installed over the entire length of the existing tunnel A on the left side where the width is not widened, and consideration is given so that a passerby will not suffer a disaster even if concrete or the like partially peels off.

<7>高強度プロテクタ1の設置。
拡幅する右側では公知の掘削機、積み込み機、運搬機械を使用して岩盤の掘削、積み出しを行う。
前記したようにこの拡幅掘削場所の付近がもっとも危険度の高い位置といえるが、この拡幅掘削場所は日ごとに前進する。
そこで、右側で拡幅掘削を行っている位置の周囲だけでは、低強度プロテクタ2の外周に高強度プロテクタ1をまたがらせて位置させる。
基本的には拡幅のための掘削は右側だけで行っているから、岩塊などはその直下に落下し、左側は安全であるはずである。
しかし掘削時には岩塊などがどのような方向に跳躍するか、掘削機などに当たって反射するか分からない。
そこで拡幅していない左側でも、強度の十分でない低強度プロテクタ2の外周を、落石などに対して十分な強度を備えた高強度プロテクタ1によって囲うことによって安全を期すものである。
ただし前記したように高強度プロテクタ1はトンネルの全長に設置するものではなく、拡幅掘削の影響しそうな範囲だけに設置すれば足りる。
<7> Installation of the high strength protector 1.
On the right side, the rock is excavated and loaded using known excavators, loaders and transporters.
As described above, the vicinity of this widening excavation site can be said to be the position with the highest risk, but this widening excavation site advances every day.
Therefore, the high-strength protector 1 is placed over the outer periphery of the low-strength protector 2 only around the position where the wide excavation is performed on the right side.
Basically, excavation for widening is performed only on the right side, so rocks should fall directly below and the left side should be safe.
However, at the time of excavation, it is not known in which direction the rocks will jump, and whether they will hit the excavator or the like.
Therefore, safety is ensured by surrounding the outer periphery of the low-strength protector 2 with insufficient strength even on the left side not widened by the high-strength protector 1 having sufficient strength against falling rocks.
However, as described above, the high-strength protector 1 is not installed over the entire length of the tunnel, but it is sufficient to install it only in a range where widening excavation is likely to be affected.

<8>高強度プロテクタ1の前進。
拡幅の掘削位置の前進に伴い、低強度プロテクタ2の外周の一部だけに位置する高強度プロテクタ1を前進させる。
その場合にトンネルの床面にレール12を敷設しておけば、そのレール12に乗った車輪11によって高強度プロテクタ1は軽快に移動することができる。
もちろん、車輪11がゴムタイヤや無限軌道である場合にはレールは不要である。
こうして強度を考慮していない低強度プロテクタ2であっても、拡幅掘削の周囲だけは常に高強度プロテクタ1で包囲されて、落石などの衝撃に耐えることができるように構成する。
<8> Advance of high-strength protector 1.
As the widening excavation position advances, the high-strength protector 1 positioned only on a part of the outer periphery of the low-strength protector 2 is advanced.
In this case, if the rail 12 is laid on the floor surface of the tunnel, the high-strength protector 1 can be easily moved by the wheels 11 on the rail 12.
Of course, when the wheel 11 is a rubber tire or an endless track, no rail is required.
Thus, even the low-strength protector 2 that does not consider the strength is configured so that only the periphery of the widening excavation is always surrounded by the high-strength protector 1 and can withstand impacts such as falling rocks.

<9>低強度プロテクタ2を右側へ。
既設トンネルAの右側の拡幅工事が終端まで到達したら、岩塊の落下などの危険性はなくなる。
そこで、左側に位置していた高強度プロテクタ1の用途は終了したから、トンネル外へ撤去する。
そしてトンネルのほぼ全長にわたって左側に位置していた低強度プロテクタ2を右側へ移動する。
右側の掘削が終了したとはいえ、コンクリートによる被覆などが終わるまでは小さな剥離などの発生の可能性があるから、低強度プロテクタ2によってそれらの事故から通行人を保護するためである。
左側には高強度プロテクタ1、低強度プロテクタ2がなくなるから、拡幅トンネルBの側壁の裾部分の改修や補強など、岩石やコンクリートの大塊が飛散する可能性のない工事を行う。
こうして既設トンネルAの拡幅工事を終了する。
<9> Move the low strength protector 2 to the right.
When the widening work on the right side of the existing tunnel A reaches the end, there is no danger of falling rocks.
Therefore, since the use of the high-strength protector 1 located on the left side is finished, it is removed from the tunnel.
Then, the low-strength protector 2 located on the left side is moved to the right side over almost the entire length of the tunnel.
This is because the low-strength protector 2 protects passers-by from these accidents even though excavation on the right side is finished, there is a possibility that small peeling or the like may occur until the covering with concrete is finished.
Since there are no high-strength protector 1 and low-strength protector 2 on the left side, construction that does not cause the possibility of large rocks or concrete splattering, such as refurbishing or reinforcing the bottom of the side wall of the widening tunnel B, is performed.
Thus, the widening work of the existing tunnel A is completed.

<10>他の実施例。
上記の実施例では、本発明の装置を、既設のトンネルを一方向に偏って拡幅するトンネルにおいて使用する場合について説明した。
しかし図4に示すように、既設のトンネルを中心に、左右方向に均等に拡幅するような工事に使用することもできる。
その場合にも岩石の落下してくる特に危険な場所は拡幅掘削場所であり、他の比較的簡易な作業場所では危険度は低い。
そこで上記の実施例と同様に、掘削場所の付近にだけ、低強度プロテクタ2の外周に高強度プロテクタ1を配置して高度な防護を行い、それ以外の位置では低強度プロテクタ2を配置することによって経済的な拡幅工事を行うことができる。
<10> Other embodiments.
In the above embodiment, the case where the apparatus of the present invention is used in a tunnel that widens the existing tunnel in one direction has been described.
However, as shown in FIG. 4, it can also be used for construction in which the existing tunnel is uniformly widened in the left-right direction around the center.
Even in that case, the particularly dangerous place where the rocks fall is the widening excavation place, and the risk is low in other relatively simple work places.
Therefore, similarly to the above-described embodiment, the high-strength protector 1 is disposed on the outer periphery of the low-strength protector 2 only in the vicinity of the excavation place to provide high protection, and the low-strength protector 2 is disposed at other positions. Can be used for economical widening.

本発明のトンネル拡幅防護装置の実施例の説明図。Explanatory drawing of the Example of the tunnel widening protection apparatus of this invention. 既設トンネルの右側を拡幅している場合の防護装置の設置状態の説明図。Explanatory drawing of the installation state of the protective device when the right side of the existing tunnel is widened. 既設トンネルの右側の拡幅が終了した場合の防護装置の設置状態の説明図。Explanatory drawing of the installation state of a protective device when the right side widening of the existing tunnel is complete | finished. 拡幅方法の他の実施例の説明図。Explanatory drawing of the other Example of the widening method.

符号の説明Explanation of symbols

1:高強度プロテクタ
2:低強度プロテクタ
A:既設トンネル
B:拡幅トンネル
C:掘削部分
1: High-strength protector 2: Low-strength protector A: Existing tunnel B: Widening tunnel C: Excavation part

Claims (3)

落石に耐える強度を持つ高強度プロテクタと、
強度を考慮しない低強度プロテクタとで構成し、
高強度プロテクタは、上部と壁面を囲った通路であって、
トンネルの拡幅の掘削作業の範囲をカバーするものであり、
かつ高強度プロテクタの壁面の下端には車輪を設け、
低強度プロテクタは、上部と壁面を囲った通路であって、
トンネルほぼ全長の長さを備えたものとして構成し、
高強度プロテクタの壁面の高さは、低強度プロテクタの壁面の高さよりも高く構成し、
低強度プロテクタの外周上に、高強度プロテクタをまたがらせて配置したことを特徴とする、
トンネル拡幅防護装置。
A high-strength protector with the strength to withstand falling rocks,
Consists of a low strength protector that does not consider strength,
A high-strength protector is a passage that surrounds the top and wall,
Covering the scope of tunnel widening excavation work,
And a wheel is provided at the lower end of the wall surface of the high-strength protector,
A low-strength protector is a passage that surrounds the top and wall,
The tunnel is configured with almost the entire length,
The wall height of the high-strength protector is configured to be higher than the wall height of the low-strength protector,
The high-strength protector is placed on the outer periphery of the low-strength protector.
Tunnel widening protection device.
拡幅するトンネルにおける通行人や車両の防護方法であって、
請求項1記載のトンネル拡幅防護装置を使用し、
拡幅掘削を行わない位置のトンネル全長に低強度プロテクタを設置し、
拡幅掘削場所の範囲に、低強度プロテクタの外周にまたがった状態の高強度プロテクタを配置し、
拡幅掘削場所では、通行人や車両は外側の高強度プロテクタと、内側の低強度プロテクタとによって二重に保護し、
拡幅掘削場所以外では通行人や車両は低強度プロテクタのみによって保護し、
拡幅掘削場所の前進とともに、高強度プロテクタだけを前進させ、
拡幅掘削作業が終了したら、
高強度プロテクタは撤去して回収し、
残った低強度プロテクタを、拡幅掘削の終わった場所へ設置し、
掘削以外の作業を継続する、
トンネルの拡幅工法。
A method of protecting passersby and vehicles in a widening tunnel,
Using the tunnel widening protection device according to claim 1,
A low-strength protector is installed over the entire length of the tunnel where widening excavation is not performed.
Place a high-strength protector that extends over the outer periphery of the low-strength protector in the range of the widening excavation site,
At widening excavation sites, passersby and vehicles are double protected by an outer high strength protector and an inner low strength protector,
Except for widening excavation sites, passers-by and vehicles are protected only by low-strength protectors,
As the widening excavation site advances, only the high-strength protector is advanced,
When the widening excavation work is finished,
Remove and recover the high-strength protector,
Install the remaining low-strength protector in the place where the widening excavation is over,
Continue work other than excavation,
Tunnel widening method.
一方向に偏って拡幅するトンネルにおける防護方法であって、
請求項1記載のトンネル拡幅防護装置を使用し、
拡幅掘削を行わない側のトンネル全長に、低強度プロテクタを設置し、
拡幅掘削場所の範囲に、低強度プロテクタの外周にまたがった状態の高強度プロテクタを配置し、
拡幅掘削場所では、通行人や車両は外側の高強度プロテクタと、内側の低強度プロテクタとによって二重に保護し、
拡幅掘削場所以外では通行人や車両は低強度プロテクタのみによって保護し、
拡幅掘削場所の前進とともに、高強度プロテクタだけを前進させ、
拡幅側の拡幅掘削が終了したら、
高強度プロテクタは撤去して回収し、
残った低強度プロテクタを、拡幅掘削の終わった側へ設置し、
それまで高強度プロテクタと低強度プロテクタとが位置していた側のトンネルの作業を行う、
トンネルの拡幅工法。
A protection method in a tunnel that widens in one direction,
Using the tunnel widening protection device according to claim 1,
A low-strength protector is installed over the entire length of the tunnel where widening excavation is not performed.
Place a high-strength protector that extends over the outer periphery of the low-strength protector in the range of the widening excavation site,
At widening excavation sites, passersby and vehicles are double protected by an outer high strength protector and an inner low strength protector,
Except for widening excavation sites, passers-by and vehicles are protected only by low-strength protectors,
As the widening excavation site advances, only the high-strength protector is advanced,
When the widening excavation on the widening side is finished,
Remove and recover the high-strength protector,
Install the remaining low-strength protector on the side where the widening excavation was completed,
Work on the tunnel on the side where the high-strength protector and low-strength protector were located,
Tunnel widening method.
JP2007175096A 2007-07-03 2007-07-03 Tunnel widening protection device and widening method. Expired - Fee Related JP4938569B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101414578B1 (en) * 2010-06-04 2014-07-03 주식회사 픽슨 Underground tunnel having space for escaping emergency and constructing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328871A (en) * 1999-05-20 2000-11-28 Kumagai Gumi Co Ltd Facilities for tunnel widening construction
JP2000356090A (en) * 1999-06-16 2000-12-26 Maeda Corp Method for widening cross section of existing tunnel using intermediate wall dividing method
JP2003239676A (en) * 2002-02-12 2003-08-27 Public Works Research Institute Apparatus for spreading width of existing tunnel
JP2003269073A (en) * 2002-03-19 2003-09-25 Public Works Research Institute Extension method of existing tunnel making use of mobile working platform
JP2004084343A (en) * 2002-08-28 2004-03-18 Public Works Research Institute Construction method for enlarging tunnel cross section and protective structure for general vehicle within tunnel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328871A (en) * 1999-05-20 2000-11-28 Kumagai Gumi Co Ltd Facilities for tunnel widening construction
JP2000356090A (en) * 1999-06-16 2000-12-26 Maeda Corp Method for widening cross section of existing tunnel using intermediate wall dividing method
JP2003239676A (en) * 2002-02-12 2003-08-27 Public Works Research Institute Apparatus for spreading width of existing tunnel
JP2003269073A (en) * 2002-03-19 2003-09-25 Public Works Research Institute Extension method of existing tunnel making use of mobile working platform
JP2004084343A (en) * 2002-08-28 2004-03-18 Public Works Research Institute Construction method for enlarging tunnel cross section and protective structure for general vehicle within tunnel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101414578B1 (en) * 2010-06-04 2014-07-03 주식회사 픽슨 Underground tunnel having space for escaping emergency and constructing method thereof

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