JP4987802B2 - Tunnel method for constructing lining back cushioning layer - Google Patents

Tunnel method for constructing lining back cushioning layer Download PDF

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JP4987802B2
JP4987802B2 JP2008156906A JP2008156906A JP4987802B2 JP 4987802 B2 JP4987802 B2 JP 4987802B2 JP 2008156906 A JP2008156906 A JP 2008156906A JP 2008156906 A JP2008156906 A JP 2008156906A JP 4987802 B2 JP4987802 B2 JP 4987802B2
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tunnel
material layer
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constructing
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一栄 野城
芳之 小島
直毅 橘
俊弘 朝倉
潤 西藤
敏雄 登坂
秀介 北原
篤実 磯谷
圭介 佐原
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Railway Technical Research Institute
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本発明は、覆工裏緩衝材層を施工するトンネル工法に関するものである。   The present invention relates to a tunnel method for constructing a lining back cushioning material layer.

従来までに建設されてきた山岳トンネルでは、新潟県中越地震のような大きな地震時には、コンクリート覆工が破壊されるような事態が生じる。
ところで、従来、以下のようなトンネル工法が提案されている。
（１）トンネルの免震壁の施工方法において、既設トンネルに適用する場合に、地盤に挿入したチェーンソー型カッターを有するベースマシンによって、カッターチェーンを回転させ、地盤を切削し、固化液と切削土を攪拌混合、もしくは置き換えを行い、順次横方向に移動して掘削を続けることにより地中に等厚で連続した免震壁を築造する（下記特許文献１参照）。 In mountain tunnels that have been built up to now, concrete linings can be destroyed during large earthquakes such as the Niigata Chuetsu earthquake.
By the way, conventionally, the following tunnel construction method has been proposed.
(1) In the method of constructing MenShinkabe tunnel, when applied to existing tunnel, the base machine having a chain saw type cutter inserted into the ground, rotates the cutter chain, cutting the soil, solidifying solution and cutting soil By stirring and mixing, or by sequentially moving in the horizontal direction and continuing excavation, a seismic isolation wall having a constant thickness is built in the ground (see Patent Document 1 below).

（２）トンネルのコンクリート内壁面を防水シートで被覆し、その外側から座金を介してアンカーボルトを打設し、ボルトのねじ部にナットを螺合して防水シートをコンクリート内壁面に押圧固定する。防水シートの外側に断熱材を介して網状体を層状に被覆し、断熱材を介して網状体外側に突出したアンカーボルトのねじ部先端側に座金を介してナットを螺合し、断熱材と網状体を押圧固定する。その外側をセメント組成物で被覆する（下記特許文献２参照）。   (2) Covering the concrete inner wall surface of the tunnel with a waterproof sheet, driving anchor bolts from the outside via a washer, and screwing the nut into the screw part of the bolt to press and fix the waterproof sheet to the concrete inner wall surface. . Cover the outside of the waterproof sheet in layers with a heat insulating material, and screw the nut through the washer to the threaded tip end side of the anchor bolt that protrudes outside the mesh through the heat insulating material. Press and fix the mesh. The outside is coated with a cement composition (see Patent Document 2 below).

（３）トンネルの一次コンクリートまたは地山壁面に釘または接着剤等により通水緩衝材が固着され、この通水緩衝材に係止材または融着により不織布が固着され、この不織布に断熱材を介装して覆工コンクリートが打設されるようにした（下記特許文献３参照）。
このように、特殊な用途としてトンネルに免震壁を設けたり、断熱材を介装させるようにしたものが提案されている。
特開２００６−１１２１８２号公報 特開平０８−２３２５９１号公報 特開平０６−２８８１９８号公報 (3) A water-cushioning material is fixed to the primary concrete or ground wall of the tunnel with a nail or an adhesive, and a nonwoven fabric is fixed to the water-cushioning material by a locking material or fusion. The lining concrete was placed so as to be interposed (see Patent Document 3 below).
In this way, as a special application, a tunnel is provided with a seismic isolation wall or a heat insulating material interposed.
JP 2006-112182 A Japanese Patent Laid-Open No. 08-232591 Japanese Patent Laid-Open No. 06-288198

しかしながら、特に、従来の緩衝工のない地山を残して建設される山岳トンネルの場合、緩衝工がないと、図５に示すように、地震に伴い地盤１０１からの変形によるコンクリート覆工１０２（地山壁面）の圧壊、ひび割れの集中により山岳トンネルの地山壁面が破壊されるといった問題がある。
本発明は、上記状況に鑑みて、覆工裏に緩衝材層を施工することにより、地震に伴う地盤からの変形を吸収して覆工を防護することができる覆工裏緩衝材層を構築したトンネル工法を提供することを目的とする。 However, in particular, in the case of a mountain tunnel constructed by leaving a natural ground without a conventional buffer, if there is no buffer, as shown in FIG. 5, the concrete lining 102 ( There is a problem that the ground wall of the mountain tunnel is destroyed due to the collapse of the ground wall) and the concentration of cracks.
In view of the above situation, the present invention constructs a lining back cushioning layer that can protect the lining by absorbing the deformation from the ground due to the earthquake by constructing the cushioning layer on the lining back. The purpose is to provide a tunnel method.

本発明は、上記目的を達成するために、
〔１〕山岳トンネルの覆工の裏面に覆工裏緩衝材層を築造する覆工裏緩衝材層を施工するトンネル工法において、鋼製支保工の内側に、塩化ビニールシート層を介して前記覆工裏緩衝材層を設け、この覆工裏緩衝材層の内側に防水シート層を施し、その内側に前記覆工を築造することを特徴とする。 In order to achieve the above object, the present invention provides
[1] In a tunnel construction method in which a lining back cushioning material layer is constructed on the reverse side of a mountain tunnel lining, the covering is provided on the inner side of a steel support through a vinyl chloride sheet layer. A back cushioning layer is provided, a waterproof sheet layer is provided on the inside of the lining back cushioning layer, and the lining is built on the inside .

〔２〕上記〔１〕記載の覆工裏緩衝材層を施工するトンネル工法において、前記塩化ビニールシート層と前記覆工裏緩衝材層と防水シート層を前記鋼製支保工に融着される吊り鉄筋金具に固定されるボルトとこのボルトに螺合するナットにより締結したことを特徴とする。 [ 2 ] In the tunnel method for constructing the lining back cushioning material layer according to [1], the vinyl chloride sheet layer, the lining backing cushioning material layer, and the waterproof sheet layer are fused to the steel support. It is characterized in that it is fastened by a bolt fixed to the hanging rebar fitting and a nut screwed into this bolt.

本発明によれば、覆工裏に緩衝材層を施工することにより、地震に伴う地盤からの変形を吸収して覆工を防護することができる。   ADVANTAGE OF THE INVENTION According to this invention, by applying a buffer material layer to a lining back, the deformation from the ground accompanying an earthquake can be absorbed and a lining can be protected.

本発明の覆工裏緩衝材層を施工するトンネル工法は、鋼製支保工の内側に、塩化ビニールシート層を介して前記覆工裏緩衝材層を設け、この覆工裏緩衝材層の内側に防水シート層を施し、その内側に前記覆工を築造する。 The tunnel construction method for constructing the lining back cushioning layer of the present invention is to provide the lining backing cushioning layer through a vinyl chloride sheet layer inside the steel support, and inside the lining backing cushioning layer. A waterproof sheet layer is applied to the lining, and the lining is built on the inside .

以下、本発明の実施の形態について詳細に説明する。
図１は本発明の参考例を示す覆工裏緩衝材層を構築したトンネル工法を示す図である。
この図において、山岳トンネルは、軌道１、鉄道車両２、トンネルの覆工３、その覆工３に施される覆工裏緩衝材層４、地盤５からなる。
このように、覆工裏緩衝材層４を施すように構成したので、地震時においても、地盤５からの変形を、覆工裏緩衝材層４が有効に吸収するので、覆工３の破壊を防ぐことができる。 Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a view showing a tunnel construction method in which a lining back cushioning material layer showing a reference example of the present invention is constructed.
In this figure, mountain tunnels, trajectory 1, railway vehicle 2, lining 3 of tunnels, lining backing buffer material layer 4 to be applied to the lining 3 of that consists of ground 5.
Thus, since it comprised so that the lining back buffer material layer 4 might be given, since the lining back buffer material layer 4 absorbs the deformation | transformation from the ground 5 effectively also at the time of an earthquake, destruction of the lining 3 Can be prevented.

図２は本発明の実施例を示す覆工裏緩衝材層を構築したトンネル工法の一例を示す模式図、図３はそのトンネル工法の具体例を示す図である。
これらの図において、鋼製支保工１１の内側に吊り鉄筋金具１２が融着され、その吊り鉄筋金具１２へ雄螺子付きのボルト１３が座金１４を介して固定される。また、鋼製支保工１１の内側には塩化ビニールシート（帯鉄止め）層１５が設けられる。この塩化ビニールシート層１５には両面テープ１６が貼り付けられており、この両面テープ１６に覆工裏緩衝材（発泡スチロール）層１７が設けられ、この覆工裏緩衝材層１７の内側には防水シート層１８が配置されて、これらは、雄螺子付きのボルト１３の先端にブチルテープワッシャー１９と平ワッシャー２０を介してナット２１により鋼製支保工１１へ締結され、最後にナット２１をカバーするようにロックボルトカバー２２が設けられる。ここでは、覆工裏緩衝材（発泡スチロール）層１７としては、縦５００ｍｍ×横１０００ｍｍの寸法のものを単位として鋼製支保工１１の内側に張り付けている〔図２（ｂ）参照〕。なお、１０は外側の地盤、２３は内側（軌道側）の覆工（コンクリート）である。 FIG. 2 is a schematic view showing an example of a tunnel construction method in which a lining back cushioning material layer according to an embodiment of the present invention is constructed, and FIG. 3 is a diagram showing a specific example of the tunnel construction method.
In these drawings, a suspended reinforcing bar 12 is fused inside a steel support 11, and a bolt 13 with a male screw is fixed to the suspended reinforcing bar 12 via a washer 14. Further, a vinyl chloride sheet (band iron stopper) layer 15 is provided inside the steel support 11. A double-sided tape 16 is affixed to the vinyl chloride sheet layer 15, and a lining back cushioning material (styrene foam) layer 17 is provided on the double-sided tape 16, and the inside of the lining back cushioning material layer 17 is waterproof. A sheet layer 18 is arranged, and these are fastened to the steel support 11 by a nut 21 via a butyl tape washer 19 and a flat washer 20 at the tip of a bolt 13 with a male screw, and finally cover the nut 21. Thus, a lock bolt cover 22 is provided . This Kodewa, lining backing cushioning material as a (foam) layer 17, Ru Tei stuck in units of one dimension of the vertical 500 mm × horizontal 1000mm inside the steel支保Engineering 11 [see FIG. 2 (b)]. In addition, 10 is an outer ground, 23 is an inner (track side) lining (concrete).

このようにして、鋼製支保工１１の内側に覆工裏緩衝材（発泡スチロール）層１７が施工され、その内側に覆工が築造される。
図４は従来のトンネル工法と本発明のトンネル工法を施した場合の模擬実験後の覆工状態を比較した図であり、図４（ａ）は従来のトンネル工法による場合、図４（ｂ）は本発明のトンネル工法による場合を示している。 In this manner, the lining back cushioning material (styrene foam) layer 17 is constructed on the inner side of the steel support 11 and the lining is built on the inner side.
FIG. 4 is a diagram comparing the lining state after a simulation test when the conventional tunnel method and the tunnel method of the present invention are applied. FIG. 4 (a) shows the case of the conventional tunnel method and FIG. 4 (b). Shows the case of the tunnel construction method of the present invention.

図４（ａ）によれば、従来のトンネル３０では、覆工の多くの箇所に剥落が見られるが、図４（ｂ）によれば、本発明のトンネル３１では覆工には剥落が見受られない。
なお、本発明は上記実施例に限定されるものではなく、本発明の趣旨に基づき種々の変形が可能であり、これらを本発明の範囲から排除するものではない。 According to FIG. 4 (a), in the conventional tunnel 30, peeling is observed at many parts of the lining, but according to FIG. 4 (b), peeling is seen in the lining in the tunnel 31 of the present invention. I can't accept it.
In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

本発明の覆工裏緩衝材層を施工するトンネル工法は、山岳トンネルの覆工の破壊を防止するトンネル工法として利用可能である。   The tunnel method for constructing the lining back cushioning material layer of the present invention can be used as a tunnel method for preventing destruction of the mountain tunnel lining.

本発明の参考例を示す覆工裏緩衝材層を構築したトンネル工法を示す図である。It is a figure which shows the tunnel construction method which constructed the lining back buffer material layer which shows the reference example of this invention. 本発明の実施例を示す覆工裏緩衝材層を構築したトンネル工法の一例を示す模式図である。It is a schematic diagram which shows an example of the tunnel construction method which constructed the lining back buffer material layer which shows the Example of this invention. 本発明の実施例を示す覆工裏緩衝材層を構築したトンネル工法の具体例を示す図である。It is a figure which shows the specific example of the tunnel construction method which constructed the lining back buffer material layer which shows the Example of this invention. 従来のトンネル工法と本発明のトンネル工法を施した場合の模擬実験後の覆工状態を比較した図である。It is the figure which compared the lining state after the simulation experiment at the time of giving the conventional tunnel method and the tunnel method of this invention. 従来のトンネル工法による問題点の模式図である。It is a schematic diagram of the problem by the conventional tunnel construction method.

１ 軌道
２ 鉄道車両
３ トンネルの覆工
４ 覆工裏緩衝材層
５ 地盤
１０ 外側の地盤
１１ 鋼製支保工
１２ 吊り鉄筋金具
１３ 雄螺子付きのボルト
１４ 座金
１５ 塩化ビニールシート層
１６ 両面テープ
１７ 覆工裏緩衝材（発泡スチロール）層
１８ 防水シート層
１９ ブチルテープワッシャー
２０ 平ワッシャー
２１ ナット
２２ ロックボルトカバー
２３ 内側（軌道側）の覆工（コンクリート）
３０ 従来のトンネル
３１ 本発明のトンネル DESCRIPTION OF SYMBOLS 1 Track | truck 2 Railway vehicle 3 Tunnel lining 4 Back lining cushioning material layer 5 Ground 10 Outer ground 11 Steel support 12 Suspension reinforcement 13 Male screw bolt 14 Washer 15 Vinyl chloride sheet layer 16 Double-sided tape 17 Cover Back cushioning layer (Styrofoam) layer 18 Waterproof sheet layer 19 Butyl tape washer 20 Flat washer 21 Nut 22 Lock bolt cover 23 Inner (track side) lining (concrete)
30 Conventional tunnel 31 Tunnel of the present invention

Claims (2)

山岳トンネルの覆工の裏面に覆工裏緩衝材層を築造する覆工裏緩衝材層を施工するトンネル工法において、鋼製支保工の内側に、塩化ビニールシート層を介して前記覆工裏緩衝材層を設け、該覆工裏緩衝材層の内側に防水シート層を施し、その内側に前記覆工を築造することを特徴とする覆工裏緩衝材層を施工するトンネル工法。 In the tunnel method of constructing a lining back cushioning material layer on the reverse side of the mountain tunnel lining, the above lining back cushioning is provided via a vinyl chloride sheet layer inside the steel support. A tunneling method for constructing a lining back buffer material layer, comprising providing a material layer, applying a waterproof sheet layer inside the lining back buffer material layer, and constructing the lining on the inside . 請求項１記載の覆工裏緩衝材層を施工するトンネル工法において、前記塩化ビニールシート層と前記覆工裏緩衝材層と防水シート層を前記鋼製支保工に融着される吊り鉄筋金具に固定されるボルトと該ボルトに螺合するナットにより締結したことを特徴とする覆工裏緩衝材層を施工するトンネル工法。   The tunnel construction method for constructing the lining back cushioning material layer according to claim 1, wherein the vinyl chloride sheet layer, the lining backing cushioning material layer, and the waterproof sheet layer are attached to a suspended rebar fitting fused to the steel support. A tunneling method for constructing a lining back cushioning material layer characterized by being fastened by a bolt to be fixed and a nut screwed to the bolt.
JP2008156906A 2008-06-16 2008-06-16 Tunnel method for constructing lining back cushioning layer Expired - Fee Related JP4987802B2 (en)

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JP6731242B2 (en) * 2015-12-10 2020-07-29 戸田建設株式会社 Lining concrete structure in mountain tunnel and composite functional sheet for it
CN112983496A (en) * 2020-11-12 2021-06-18 河北钢铁集团矿业有限公司 Method for plugging bad old drilled hole underground
CN114215544B (en) * 2021-11-23 2022-09-09 西南交通大学 Tunnel longitudinal deformation self-adaptive structure of control by temperature change release
CN114645723B (en) * 2022-04-01 2022-09-30 中铁第五勘察设计院集团有限公司 High ground stress interbedded tunnel control large deformation combined supporting structure
CN116104524B (en) * 2023-04-14 2023-06-27 山西省交通新技术发展有限公司 Bridge tunnel supporting member and using method thereof

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JPS5847899A (en) * 1981-09-16 1983-03-19 鉄建建設株式会社 Method of covering construction of tunnel
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