JP2006274629A - Tunnel lining concrete inner surface reinforcing method and its structure - Google Patents

Tunnel lining concrete inner surface reinforcing method and its structure Download PDF

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JP2006274629A
JP2006274629A JP2005093953A JP2005093953A JP2006274629A JP 2006274629 A JP2006274629 A JP 2006274629A JP 2005093953 A JP2005093953 A JP 2005093953A JP 2005093953 A JP2005093953 A JP 2005093953A JP 2006274629 A JP2006274629 A JP 2006274629A
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tunnel lining
lining concrete
surface reinforcing
opening
reinforcing member
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JP4536565B2 (en
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Yoshiyuki Kojima
芳之 小島
Kazue Noshiro
一栄 野城
Kenichi Kuribayashi
健一 栗林
Takatoshi Ono
隆利 小野
Takashi Nakayama
貴司 仲山
Shinji Konishi
真治 小西
Katsumi Hino
勝巳 樋野
Tatsuya Kishimoto
達也 岸本
Hirokuni Shinomiya
弘州 篠宮
Yoshihiro Ishikawa
善大 石川
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FUKKEN ENGINEERING KK
Railway Technical Research Institute
Sho Bond Corp
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FUKKEN ENGINEERING KK
Railway Technical Research Institute
Sho Bond Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tunnel lining concrete inner surface reinforcing method and its structure having a remarkable effect in improving strength and toughness causing no brittle breaking even when tunnel lining concrete receives rock pressure, and having excellent inspection performance after reinforcement. <P>SOLUTION: The tunnel lining concrete inner surface reinforcing structure is constituted by disposing an inner surface reinforcing member with lacking parts on the tunnel lining concrete. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、トンネル覆工コンクリートの内面補強工法及びその構造物に関するものである。   The present invention relates to an inner surface reinforcing method for tunnel lining concrete and a structure thereof.

トンネル覆工コンクリートは、周辺地山に支持されるため、その剛性は大きいが、さらに大きな地圧が作用しても、複数のひび割れを分散して生じさせるなど、変形を許容するように、靭性に富んだ構造体であることが望ましい。
なし Because tunnel lining concrete is supported by surrounding ground, its rigidity is high, but toughness is allowed to allow deformation, such as the generation of multiple cracks even when large earth pressure is applied. It is desirable that the structure is rich.
None

しかしながら、周辺地山の支持条件、また地圧の大きさや分布によっては、トンネル覆工コンクリートに、局所的に大きな曲げ応力が発生する場合がある。この場合の対策の１つとして、トンネル覆工コンクリートの曲げ耐力を、鋼板や繊維シートなどの引張部材により向上させる、曲げ補強があげられる。   However, depending on the support conditions of the surrounding ground and the magnitude and distribution of the earth pressure, a large bending stress may be locally generated in the tunnel lining concrete. One countermeasure in this case is bending reinforcement that improves the bending strength of the tunnel lining concrete with a tensile member such as a steel plate or a fiber sheet.

図９はかかるトンネル覆工コンクリートの一般的な補強工法の断面模式図である。   FIG. 9 is a schematic cross-sectional view of a general reinforcing method for such tunnel lining concrete.

この図に示すように、従来、周辺地山Ａに支持されるトンネル覆工コンクリート１０１には鋼板や繊維シートなどの引張部材よりなる内面補強部材１０２を取り付けて、補強を行うようにしていた。   As shown in this figure, conventionally, the tunnel lining concrete 101 supported by the surrounding natural ground A is attached with an inner surface reinforcing member 102 made of a tensile member such as a steel plate or a fiber sheet for reinforcement.

しかし、このような曲げ補強設計にあたって、引張部材をより多く配置することが覆工耐力の向上につながるとは限らないという点に留意する必要がある。すなわち、過度な曲げ引張補強は、トンネル覆工コンクリートの終局の破壊モードを曲げ圧縮破壊とさせる。さらに、土圧の分布によっては、せん断破壊となる場合も想定される。これらは、非常に脆性的な破壊となる。   However, in such a bending reinforcement design, it is necessary to pay attention to the fact that arranging more tension members does not necessarily lead to an improvement in the lining strength. That is, excessive bending tensile reinforcement causes the ultimate failure mode of tunnel lining concrete to be bending compression failure. Furthermore, depending on the distribution of earth pressure, a shear failure may be assumed. These are very brittle fractures.

また、トンネル覆工コンクリートの背面の地下水が覆工の亀裂や目地に沿って生じると、従来の内面補強工法では、図９に示すように覆工全面を覆ってしまうため、地山からの漏水が覆工１０１と内面補強部材１０２の界面で滞水し、内面補強部材１０２の腐食や覆工の劣化などの変状を生じさせる恐れがあった。   In addition, if groundwater on the back of tunnel lining concrete is generated along the cracks and joints of the lining, the conventional inner surface reinforcement method covers the entire lining as shown in FIG. However, there is a risk that the water stagnates at the interface between the lining 101 and the inner surface reinforcing member 102 and causes deformation such as corrosion of the inner surface reinforcing member 102 and deterioration of the lining.

本発明は、上記状況に鑑みて、トンネル覆工コンクリートが地圧を受ける場合にも、脆性的な破壊を生じることがなく、強度と靭性の向上効果が顕著で、かつ補強後の点検性能にも優れたトンネル覆工コンクリートの内面補強工法及びその構造物を提供することを目的とする。   In view of the above situation, the present invention does not cause brittle fracture even when the tunnel lining concrete is subjected to earth pressure, has a remarkable effect of improving strength and toughness, and has improved inspection performance after reinforcement. Another object of the present invention is to provide a tunnel lining concrete inner surface reinforcing method and its structure.

本発明は、上記目的を達成するために、
〔１〕トンネル覆工コンクリートの内面補強工法において、内面補強部材に欠損部を形成し、トンネル覆工コンクリートの脆性的な破壊を防止することを特徴とする。 In order to achieve the above object, the present invention provides
[1] An inner surface reinforcing method for tunnel lining concrete is characterized in that a defect portion is formed in the inner surface reinforcing member to prevent brittle fracture of the tunnel lining concrete.

〔２〕上記〔１〕記載のトンネル覆工コンクリートの内面補強工法において、前記欠損部を開口となし、この開口を露出させることにより、設置後のトンネル覆工コンクリートの状態を直接目視にて点検可能にすることを特徴とする。   [2] In the tunnel lining concrete inner surface reinforcing method described in [1] above, the defect portion is formed as an opening, and the opening is exposed to directly inspect the condition of the tunnel lining concrete after installation. It is characterized by enabling.

〔３〕上記〔１〕記載のトンネル覆工コンクリートの内面補強工法において、前記欠損部を開口となし、この開口に低強度・低弾性補強材を配置し、前記トンネル覆工コンクリートの破片の落下を防止することを特徴とする。   [3] In the tunnel lining concrete inner surface reinforcing method according to [1], the defect portion is formed as an opening, and a low-strength and low-elasticity reinforcing material is disposed in the opening, and the falling of the fragments of the tunnel lining concrete It is characterized by preventing.

〔４〕トンネル覆工コンクリートの内面補強構造物であって、トンネル覆工コンクリート上に欠損部を有する内面補強部材を配設したことを特徴とする。   [4] A tunnel lining concrete inner surface reinforcing structure, characterized in that an inner surface reinforcing member having a defect portion is disposed on the tunnel lining concrete.

〔５〕上記〔４〕記載のトンネル覆工コンクリートの内面補強構造物において、前記内面補強部材が鋼板、高弾性プレキャストパネル又は繊維シートであることを特徴とする。   [5] The tunnel lining concrete inner surface reinforcing structure according to [4], wherein the inner surface reinforcing member is a steel plate, a highly elastic precast panel, or a fiber sheet.

〔６〕上記〔４〕又は〔５〕記載のトンネル覆工コンクリートの内面補強構造物において、前記欠損部が開口を有し、この開口が露出されていることを特徴とする。   [6] The tunnel lining concrete inner surface reinforcing structure according to the above [4] or [5], wherein the defect portion has an opening, and the opening is exposed.

〔７〕上記〔４〕又は〔５〕記載のトンネル覆工コンクリートの内面補強構造物において、前記欠損部が開口を有し、この開口に配置される低強度・低弾性補強材を有することを特徴とする。   [7] In the inner surface reinforcing structure of tunnel lining concrete according to [4] or [5], the defect portion has an opening, and has a low-strength and low-elasticity reinforcing material disposed in the opening. Features.

〔８〕上記〔４〕から〔７〕の何れか一項記載のトンネル覆工コンクリートの内面補強構造物において、前記内面補強部材が複数枚タイル状に配置されていることを特徴とする。   [8] The inner surface reinforcing structure for tunnel lining concrete according to any one of [4] to [7], wherein the inner surface reinforcing members are arranged in a tile shape.

〔９〕上記〔４〕から〔７〕の何れか一項記載のトンネル覆工コンクリートの内面補強構造物において、前記タイル状の内面補強部材内に欠損部を設けることを特徴とする。   [9] The tunnel lining concrete inner surface reinforcing structure according to any one of [4] to [7], wherein a defect portion is provided in the tile-shaped inner surface reinforcing member.

〔１０〕上記〔９〕記載のトンネル覆工コンクリートの内面補強構造物において、前記タイル状の内面補強部材内に複数の欠損部を設けることを特徴とする。   [10] The tunnel lining concrete inner surface reinforcing structure according to [9], wherein a plurality of missing portions are provided in the tile-shaped inner surface reinforcing member.

〔１１〕上記〔９〕記載のトンネル覆工コンクリートの内面補強構造物において、前記タイル状の内面補強部材の側面に欠損部を設けることを特徴とする。   [11] The tunnel lining concrete inner surface reinforcing structure according to the above [9], wherein a defect portion is provided on a side surface of the tile-shaped inner surface reinforcing member.

本発明によれば、以下のような効果を奏することができる。   According to the present invention, the following effects can be achieved.

（１）トンネル覆工コンクリートが地圧を受ける場合にも、脆性的な破壊を生じることがなく、強度と靭性の向上効果が顕著で、かつ補強後の点検性能にも優れている。   (1) Even when tunnel lining concrete is subjected to earth pressure, brittle fracture does not occur, the effect of improving strength and toughness is remarkable, and the inspection performance after reinforcement is also excellent.

（２）補強部材の欠損部のコンクリート断面で複数のひび割れが生じることで、覆工コンクリート全体を靭性に富んだ構造物とし、脆性的な破壊を生じさせない。   (2) Since a plurality of cracks are generated in the concrete cross section of the defective portion of the reinforcing member, the entire lining concrete is made a tough structure and does not cause brittle fracture.

（３）構造体として変位（ひび割れ）を許容することは、大きな地圧を吸収することである。すなわち、剛性を大きくすることで大きな地圧に対抗してきた従来の内面補強工法に比べ、補強材の剛性を小さくすることができる。   (3) To allow displacement (cracking) as a structure is to absorb a large earth pressure. That is, by increasing the rigidity, the rigidity of the reinforcing material can be reduced as compared with the conventional inner surface reinforcing method that has been against a large earth pressure.

（４）従来の内面補強工法に比べ経済性に優れる。すなわち、同じ種類の補強材を用いて、同程度の地圧を吸収することを期待する場合、本発明で使用する補強部材の量は、従来の内面補強工法に比べ少なく、経済性に優れている。   (4) It is more economical than conventional internal reinforcement methods. That is, when it is expected to absorb the same level of ground pressure using the same type of reinforcing material, the amount of the reinforcing member used in the present invention is less than the conventional inner surface reinforcing method, and is excellent in economic efficiency. Yes.

（５）従来の内面補強工法と変わらない現場作業量である。つまり、施工方法は変わらないため、従来工法と変わらない現場作業量ですむ。   (5) The amount of work on site is the same as the conventional inner surface reinforcement method. In other words, since the construction method does not change, the amount of work on site is the same as the conventional method.

（６）補強後の点検性能を向上させることができる。すなわち、補強部材の欠損部の開口を露出させたタイプのものは、補強部材の設置後においてトンネル覆工コンクリートの状態を確認することができる。   (6) The inspection performance after reinforcement can be improved. That is, in the type in which the opening of the missing part of the reinforcing member is exposed, the state of the tunnel lining concrete can be confirmed after the reinforcing member is installed.

（７）トンネル覆工コンクリートの背面から地下水が生じても、本発明における内面補強部材の欠損部（開口）は、漏水の排出口の機能を果たすことができる。   (7) Even if groundwater is generated from the back surface of the tunnel lining concrete, the deficient portion (opening) of the inner surface reinforcing member in the present invention can function as a water discharge outlet.

本発明のトンネル覆工コンクリートの内面補強工法及びその構造物は、靭性に富んだトンネル覆工コンクリートの内面補強として利用可能である。   INDUSTRIAL APPLICABILITY The inner surface reinforcement method for tunnel lining concrete and the structure thereof according to the present invention can be used as inner surface reinforcement for tunnel lining concrete having high toughness.

以下、本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail.

図１は本発明にかかるトンネル覆工コンクリートの内面補強工法を示す断面模式図である。   FIG. 1 is a schematic cross-sectional view showing an inner surface reinforcing method for tunnel lining concrete according to the present invention.

この図に示すように、周辺地山Ａに支持されるトンネル覆工コンクリート１の表面には欠損部３を有する鋼板・高弾性プレキャストパネル・繊維シートなどの内面補強部材２が配置される。なお、この欠損部３は内面補強部材２１に設けられた開口であり、この開口を露出させるようにしてもよいし、この開口に低強度・低弾性補強材を配置するようにしてもよい。   As shown in this figure, an inner surface reinforcing member 2 such as a steel plate, a highly elastic precast panel, or a fiber sheet having a defect portion 3 is disposed on the surface of the tunnel lining concrete 1 supported by the surrounding natural ground A. In addition, this defect | deletion part 3 is an opening provided in the inner surface reinforcement member 21, You may make it expose this opening, and you may make it arrange | position a low intensity | strength and low elastic reinforcement material in this opening.

図２は本発明のトンネル覆工コンクリートの内面補強工法を施工した場合の破壊状況を示す断面模式図である。   FIG. 2 is a schematic cross-sectional view showing the state of failure when the inner surface reinforcement method for tunnel lining concrete of the present invention is applied.

この図において、トンネル覆工コンクリート１の表面には、欠損部３を有する内面補強部材２が配置されているので、地圧４と脚部支持力５が作用すると、欠損部３に曲げ引張破壊力６が生成する（曲げ破壊先行型）となる。   In this figure, since the inner surface reinforcing member 2 having the defect portion 3 is arranged on the surface of the tunnel lining concrete 1, when the ground pressure 4 and the leg supporting force 5 act, the bending tensile fracture is applied to the defect portion 3. Force 6 is generated (bending fracture preceding type).

この欠損部３に生成される曲げ引張破壊力６により、欠損部３の断面にひび割れが生じることとなる。このように、内面補強部材の欠損部３で複数のひび割れを生じさせるということは、トンネル覆工コンクリートに作用する外力を吸収するということであり、その結果、脆性的な破壊が生じるのを防ぐことができる。   The bending tensile fracture force 6 generated in the defect portion 3 causes a crack in the cross section of the defect portion 3. As described above, generating a plurality of cracks in the defect portion 3 of the inner surface reinforcing member means absorbing external force acting on the tunnel lining concrete, and as a result, preventing brittle fracture. be able to.

以下、各種の欠損部形状を有する実施例について説明する。   Hereinafter, examples having various defect shape will be described.

図３は本発明の第１実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。   FIG. 3 is a partial schematic view of the inner surface reinforcing method for tunnel lining concrete showing the first embodiment of the present invention.

この実施例においては、トンネル覆工コンクリート１１上に複数の内面補強部材１２がタイル状に配置される。この内面補強部材１２には十字状の切り欠き部（欠損部）１３が形成される。なお、内面補強部材１２はタイル状に複数配置されるのではなく、一枚の広い内面補強部材に複数の十字状の切り欠き部を形成するようにしてもよい。また、切り欠き部（欠損部）１３は露出するようにしてもよいし、その開口に低強度・低弾性補強材を配置するようにしてもよい。   In this embodiment, a plurality of inner surface reinforcing members 12 are arranged in a tile shape on the tunnel lining concrete 11. The inner surface reinforcing member 12 is formed with a cross-shaped cutout (deletion) 13. The plurality of inner surface reinforcing members 12 are not arranged in a tile shape, but a plurality of cross-shaped cutout portions may be formed on one wide inner surface reinforcing member. Further, the cutout portion (deletion portion) 13 may be exposed, or a low-strength and low-elasticity reinforcing material may be disposed in the opening.

図４は本発明の第２実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。   FIG. 4 is a partial schematic view of a tunnel lining concrete inner surface reinforcing method showing a second embodiment of the present invention.

この実施例においては、トンネル覆工コンクリート２１上に複数の内面補強部材２２がタイル状に配置される。この内面補強部材２２の両側には楕円弧形状の切り欠き部（欠損部）２３が形成される。この切り欠き部（欠損部）２３は露出させてもよいし、この切り欠き部（欠損部）２３に低強度・低弾性補強材を配置するようにしてもよい。   In this embodiment, a plurality of inner surface reinforcing members 22 are arranged in a tile shape on the tunnel lining concrete 21. On both sides of the inner surface reinforcing member 22, cutout portions (defect portions) 23 having an elliptical arc shape are formed. The cutout portion (defect portion) 23 may be exposed, or a low-strength / low-elastic reinforcement material may be disposed in the cutout portion (deletion portion) 23.

図５は本発明の第３実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。   FIG. 5 is a partial schematic view of a tunnel lining concrete inner surface reinforcing method showing a third embodiment of the present invention.

この実施例においては、トンネル覆工コンクリート３１上に複数の内面補強部材３２がタイル状に配置される。この内面補強部材３２には１個の縦長楕円形状の切り欠き部（欠損部）３３が形成される。なお、内面補強部材３２はタイル状に複数配置されるのではなく、一枚の広い内面補強部材に複数の楕円形状の切り欠き部を形成するようにしてもよい。また、この切り欠き部（欠損部）３３は露出させてもよいし、この切り欠き部（欠損部）３３に低強度・低弾性補強材を配置するようにしてもよい。   In this embodiment, a plurality of inner surface reinforcing members 32 are arranged in a tile shape on the tunnel lining concrete 31. The inner surface reinforcing member 32 is formed with one vertically long oval cutout (deletion) 33. Note that a plurality of inner surface reinforcing members 32 are not arranged in a tile shape, but a plurality of elliptical cutout portions may be formed in one wide inner surface reinforcing member. Further, the cutout portion (defect portion) 33 may be exposed, or a low-strength and low-elasticity reinforcing material may be disposed in the cutout portion (deletion portion) 33.

図６は本発明の第４実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。   FIG. 6 is a partial schematic view of a tunnel lining concrete inner surface reinforcing method showing a fourth embodiment of the present invention.

この実施例においては、トンネル覆工コンクリート４１上に複数の内面補強部材４２がタイル状に配置される。この内面補強部材４２には２個の横長楕円形状の切り欠き部（欠損部）４３が形成される。なお、内面補強部材４２はタイル状に複数配置されるのではなく、一枚の広い内面補強部材に複数の楕円形状の切り欠き部を形成するようにしてもよい。また、この切り欠き部（欠損部）４３は露出させてもよいし、この切り欠き部（欠損部）４３に低強度・低弾性補強材を配置するようにしてもよい。   In this embodiment, a plurality of inner surface reinforcing members 42 are arranged in a tile shape on the tunnel lining concrete 41. The inner surface reinforcing member 42 is formed with two horizontally long oval cutouts (defects) 43. A plurality of inner surface reinforcing members 42 are not arranged in a tile shape, but a plurality of elliptical cutout portions may be formed in one wide inner surface reinforcing member. Further, the notch (defect portion) 43 may be exposed, or a low-strength / low-elastic reinforcement material may be disposed in the notch (deletion portion) 43.

なお、欠損部の形状は上記した以外にも各種の形状にするようにしてもよい。   In addition to the above, the shape of the defect portion may be various shapes.

図７は本発明の他の実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。   FIG. 7 is a partial schematic view of a tunnel lining concrete inner surface reinforcing method showing another embodiment of the present invention.

この実施例においては、トンネル覆工コンクリート５１上に上下に内面補強部材５２（例えば、繊維シート）がタイル状に配置される。この上下の内面補強部材５２の間に長方形の欠損部５３を有し、この欠損部５３は露出させてもよいし、この欠損部５３には低強度・低弾性補強材を配置するようにしてもよい。   In this embodiment, inner surface reinforcing members 52 (for example, fiber sheets) are arranged in a tile shape on the tunnel lining concrete 51 in the vertical direction. A rectangular defect 53 is provided between the upper and lower inner surface reinforcing members 52, and the defect 53 may be exposed, or a low-strength / low-elastic reinforcement material may be disposed in the defect 53. Also good.

図８はトンネル覆工コンクリートの破壊モードの状況を示す図であり、横軸に変位μ、縦軸は荷重Ｐを示している。ここで、×付き線はトンネル覆工コンクリートに補強なしの場合、実線は従来の内面補強を行った場合、○付き線は本発明の内面補強を行った場合を示しており、本発明の内面補強の場合は靭性が向上していることが明らかである。   FIG. 8 is a diagram showing the state of the fracture mode of the tunnel lining concrete, in which the horizontal axis indicates the displacement μ and the vertical axis indicates the load P. Here, the line with x indicates the case where the tunnel lining concrete is not reinforced, the solid line indicates the case where the conventional inner surface reinforcement is performed, the circled line indicates the case where the inner surface reinforcement of the present invention is performed, and the inner surface of the present invention In the case of reinforcement, it is clear that the toughness is improved.

すなわち、上記した実施例によれば、内面補強部材が欠損部を有しているため、
（１）靭性の向上を図ることができる。図１及び図２に示すように、補強部材の欠損部のコンクリート断面で複数のひび割れが生じることで、トンネル覆工コンクリート全体を靭性に富んだ構造物とし、脆性的な破壊を生じさせない。つまり、トンネル覆工コンクリートに作用する大きなエネルギーを吸収できる機能を有している。 That is, according to the above-described embodiment, the inner surface reinforcing member has a missing portion.
(1) The toughness can be improved. As shown in FIGS. 1 and 2, a plurality of cracks are generated in the concrete cross section of the defective portion of the reinforcing member, so that the entire tunnel lining concrete is made a tough structure and does not cause brittle fracture. That is, it has a function of absorbing a large energy acting on the tunnel lining concrete.

構造体として変位（ひび割れ）を許容することで、大きな地圧を吸収することができる。これにより、剛性を大きくすることで大きな地圧に対抗してきた従来の内面補強工法に比べて、補強部材の剛性を小さくすることができる。   By allowing displacement (cracking) as a structure, a large earth pressure can be absorbed. Thereby, the rigidity of a reinforcement member can be made small compared with the conventional internal surface reinforcement construction method which countered the big earth pressure by increasing rigidity.

（２）また、欠損部を露出させる場合には、その欠損部から設置後の覆工コンクリートの状態を直接目視にて点検することができる。   (2) Moreover, when exposing a defect | deletion part, the state of the lining concrete after installation can be directly visually inspected from the defect | deletion part.

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いて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。   In addition, this invention is not limited to the said Example, A various deformation | transformation is possible based on the meaning of this invention, and these are not excluded from the scope of the present invention.

本発明のトンネル覆工コンクリートの内面補強工法及びその構造物は、補強部材の剛性を小さくし、靭性に富んだ構造を有するトンネル覆工コンクリートの内面補強に利用することができる。   INDUSTRIAL APPLICABILITY The inner surface reinforcement method for tunnel lining concrete and the structure thereof according to the present invention can be used for inner surface reinforcement of tunnel lining concrete having a structure having high toughness by reducing the rigidity of the reinforcing member.

本発明にかかるトンネル覆工コンクリートの内面補強工法を示す断面模式図である。It is a cross-sectional schematic diagram which shows the inner surface reinforcement construction method of the tunnel lining concrete concerning this invention. 本発明のトンネル覆工コンクリートの内面補強工法を施工した場合の破壊状況を示す断面模式図である。It is a cross-sectional schematic diagram which shows the destruction condition at the time of constructing the inner surface reinforcement construction method of the tunnel lining concrete of this invention. 本発明の第１実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。It is a partial schematic diagram of the inner surface reinforcement construction method of the tunnel lining concrete which shows 1st Example of this invention. 本発明の第２実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。It is a partial schematic diagram of the inner surface reinforcement construction method of the tunnel lining concrete which shows 2nd Example of this invention. 本発明の第３実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。It is a partial schematic diagram of the inner surface reinforcement construction method of the tunnel lining concrete which shows 3rd Example of this invention. 本発明の第４実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。It is a partial schematic diagram of the inner surface reinforcement construction method of the tunnel lining concrete which shows 4th Example of this invention. 本発明の他の実施例を示すトンネル覆工コンクリートの内面補強工法の部分模式図である。It is the partial schematic diagram of the inner surface reinforcement construction method of the tunnel lining concrete which shows the other Example of this invention. トンネル覆工コンクリートの破壊モードの状況を示す図である。It is a figure which shows the condition of the destruction mode of tunnel lining concrete. トンネル覆工コンクリートの一般的な補強工法の断面模式図である。It is a cross-sectional schematic diagram of the general reinforcement construction method of tunnel lining concrete.

符号の説明Explanation of symbols

Ａ 地山
１，１１，２１，３１，４１，５１ トンネル覆工コンクリート
２，１２，２２，３２，４２，５２ 内面補強部材
３ 欠損部
４ 地圧
５ 脚部支持力
６ 曲げ引張破壊力
１３ 十字状の切り欠き部（欠損部）
２３ 楕円弧形状の切り欠き部（欠損部）
３３ 縦長楕円形状の切り欠き部（欠損部）
４３ ２個の横長楕円形状の切り欠き部（欠損部）
５３ 長方形の欠損部 A Ground mountain 1,11,21,31,41,51 Tunnel lining concrete 2,12,22,32,42,52 Inner reinforcement member 3 Deficient part 4 Ground pressure 5 Leg support force 6 Bending tensile breaking force 13 Cross Notch (defect)
23 Oval arc shaped cutout (defect)
33 Long oval cutout (defect)
43 Two oblong cutouts (defects)
53 Rectangular defect

Claims (11)

トンネル覆工コンクリートの内面補強工法において、内面補強部材に欠損部を形成し、トンネル覆工コンクリートの脆性的な破壊を防止することを特徴とするトンネル覆工コンクリートの内面補強工法。   An inner surface reinforcing method for tunnel lining concrete, wherein a defect portion is formed in the inner surface reinforcing member to prevent brittle fracture of the tunnel lining concrete. 請求項１記載のトンネル覆工コンクリートの内面補強工法において、前記欠損部を開口となし、該開口を露出させることにより、設置後のトンネル覆工コンクリートの状態を直接目視にて点検可能にすることを特徴とするトンネル覆工コンクリートの内面補強工法。   The inner surface reinforcement method for tunnel lining concrete according to claim 1, wherein the defect portion is formed as an opening, and the opening is exposed so that the state of the tunnel lining concrete after installation can be directly visually inspected. An internal reinforcement method for tunnel lining concrete. 請求項１記載のトンネル覆工コンクリートの内面補強工法において、前記欠損部を開口となし、該開口に低強度・低弾性補強材を配置し、前記トンネル覆工コンクリートの破片の落下を防止することを特徴とするトンネル覆工コンクリートの内面補強工法。   The inner surface reinforcing method for tunnel lining concrete according to claim 1, wherein the defect portion is formed as an opening, and a low-strength and low-elasticity reinforcing material is disposed in the opening to prevent the tunnel lining concrete from falling. An internal reinforcement method for tunnel lining concrete. トンネル覆工コンクリートの内面補強構造物であって、トンネル覆工コンクリート上に欠損部を有する内面補強部材を配設したことを特徴とするトンネル覆工コンクリートの内面補強構造物。   An inner surface reinforcing structure for tunnel lining concrete, wherein an inner surface reinforcing member having a defect portion is disposed on the tunnel lining concrete. 請求項４記載のトンネル覆工コンクリートの内面補強構造物において、前記内面補強部材が鋼板、高弾性プレキャストパネル又は繊維シートであることを特徴とするトンネル覆工コンクリートの内面補強構造物。   The inner surface reinforcing structure for tunnel lining concrete according to claim 4, wherein the inner surface reinforcing member is a steel plate, a highly elastic precast panel or a fiber sheet. 請求項４又は５記載のトンネル覆工コンクリートの内面補強構造物において、前記欠損部が開口を有し、該開口が露出されていることを特徴とするトンネル覆工コンクリートの内面補強構造物。   6. The inner surface reinforcing structure for tunnel lining concrete according to claim 4 or 5, wherein the defect portion has an opening, and the opening is exposed. 請求項４又は５記載のトンネル覆工コンクリートの内面補強構造物において、前記欠損部が開口を有し、該開口に配置される低強度・低弾性補強材を有することを特徴とするトンネル覆工コンクリートの内面補強構造物。   The tunnel lining concrete structure for tunnel lining concrete according to claim 4 or 5, characterized in that the deficient portion has an opening, and has a low-strength and low-elasticity reinforcing material disposed in the opening. Concrete internal reinforcement structure. 請求項４から７の何れか一項記載のトンネル覆工コンクリートの内面補強構造物において、前記内面補強部材が複数枚タイル状に配置されていることを特徴とするトンネル覆工コンクリートの内面補強構造物。   The inner surface reinforcing structure for tunnel lining concrete according to any one of claims 4 to 7, wherein the inner surface reinforcing members are arranged in a tile shape. object. 請求項４から７の何れか一項記載のトンネル覆工コンクリートの内面補強構造物において、前記タイル状の内面補強部材内に欠損部を設けることを特徴とするトンネル覆工コンクリートの内面補強構造物。   The tunnel lining concrete inner surface reinforcing structure according to any one of claims 4 to 7, wherein a defect portion is provided in the tile-shaped inner surface reinforcing member. . 請求項９記載のトンネル覆工コンクリートの内面補強構造物において、前記タイル状の内面補強部材内に複数の欠損部を設けることを特徴とするトンネル覆工コンクリートの内面補強構造物。   The tunnel lining concrete inner surface reinforcing structure according to claim 9, wherein a plurality of deficient portions are provided in the tile-shaped inner surface reinforcing member. 請求項９記載のトンネル覆工コンクリートの内面補強構造物において、前記タイル状の内面補強部材の側面に欠損部を設けることを特徴とするトンネル覆工コンクリートの内面補強構造物。   10. The inner surface reinforcing structure for tunnel lining concrete according to claim 9, wherein a defect portion is provided on a side surface of the tile-shaped inner surface reinforcing member.
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Publication number Priority date Publication date Assignee Title
JP2017160732A (en) * 2016-03-11 2017-09-14 公益財団法人鉄道総合技術研究所 Construction method for taking measure against peeling-off of mortar or concrete surface by spraying resin
JP2019218859A (en) * 2019-10-07 2019-12-26 公益財団法人鉄道総合技術研究所 Exfoliation countermeasure construction method of mortar or concrete surface by resin spray
WO2024007573A1 (en) * 2023-01-05 2024-01-11 江西丰强科技发展有限公司 Underpassing tunnel lining concrete interface connection structure and connection method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001262841A (en) * 2000-01-14 2001-09-26 Haneda Concrete Industrial Co Ltd Reinforcing method for concrete structure, reinforced panel, and reinforced panel fixing tool
JP2002061496A (en) * 2000-06-05 2002-02-28 Bridgestone Corp Panel for mending concrete
JP2002348749A (en) * 2001-05-25 2002-12-04 Toray Ind Inc Woven fabric of reinforcing fiber, and concrete structure reinforced with the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017160732A (en) * 2016-03-11 2017-09-14 公益財団法人鉄道総合技術研究所 Construction method for taking measure against peeling-off of mortar or concrete surface by spraying resin
JP2019218859A (en) * 2019-10-07 2019-12-26 公益財団法人鉄道総合技術研究所 Exfoliation countermeasure construction method of mortar or concrete surface by resin spray
WO2024007573A1 (en) * 2023-01-05 2024-01-11 江西丰强科技发展有限公司 Underpassing tunnel lining concrete interface connection structure and connection method

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