JPH02266098A - Spray curing construction for tunnel facing - Google Patents
Spray curing construction for tunnel facingInfo
- Publication number
- JPH02266098A JPH02266098A JP1085195A JP8519589A JPH02266098A JP H02266098 A JPH02266098 A JP H02266098A JP 1085195 A JP1085195 A JP 1085195A JP 8519589 A JP8519589 A JP 8519589A JP H02266098 A JPH02266098 A JP H02266098A
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- face
- curing material
- emulsion
- film
- 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.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims description 12
- 238000010276 construction Methods 0.000 title abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 238000001723 curing Methods 0.000 claims description 24
- 239000000839 emulsion Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 5
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、ｌ−ンネル切羽の吹付養生工法に関するも
のである。さらに詳しくは、この発明は、空気接触崩壊
性もしくは膨張性地山の切羽部位における崩壊を効果的
に抑止することのできるトンネル切羽の吹付養生工法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a spray curing method for a tunnel face. More specifically, the present invention relates to a spray curing method for tunnel faces that can effectively prevent collapse at the face of air-contact collapsible or expansible rock.
（従来の技術とその課題）
従来より、ＮＡＴＭ工法によるトンネル掘削工事におい
ては、切羽の地質が空気に接触して風化しやすい粘性土
や膨脂性粘性上の場合、切羽を安定させる手段の一つと
して切羽面にコンクリートを吹付りる鏡吹きか行われて
きている。(Conventional technology and its issues) Traditionally, in tunnel excavation work using the NATM method, when the geology of the face is clayey soil or swelling viscosity that easily weathers when it comes in contact with the air, it is one of the means to stabilize the face. Mirror spraying, which involves spraying concrete onto the face, has been carried out as a method.
しかしながら、従来のコンクリート吹付けによる切羽安
定工法は、その実際面においていくつかの問題点がある
。However, the conventional face stabilization method using concrete spraying has several problems in practice.
すなわち、まず問題となるのは、これまでのコンクリ−
１〜吹付は工法は、既設の吹付コンクリート設備を用い
て切羽面にコンクリートを吹付けているなめに粉塵の発
生か多く、しかも通常のトンネル工事に用いる吹付設備
を使用しているために切羽面への吹付けのための段取り
換えに時間かかかり、切羽面への鏡吹きを行っている間
は他の吹付は作業が停止することである。In other words, the first problem is that the concrete
1 - The spraying method uses existing shotcrete equipment to spray concrete onto the face, which generates a lot of dust.Furthermore, the spraying equipment used for normal tunnel construction is used, so the concrete is sprayed onto the face. It takes time to change the setup for spraying, and while mirror spraying is being carried out on the face, other spraying operations are stopped.
また、空気崩壊性や膨張性の特に著しい切羽においては
、掘削中に切羽の崩壊が生じる。つまり、ロードへツタ
−等による機械掘削機によって切羽全面の掘削が完了し
てから鏡吹きを行っていたので、すでに掘削を終了し、
そのまま放置していた部分から急速に崩壊が進行すると
いう欠点があった。In addition, if the face is particularly air-collapsible or expansive, the face collapses during excavation. In other words, mirror blowing was performed after the entire surface of the face had been excavated using a mechanical excavator such as a load cutter, so the excavation had already been completed.
The disadvantage was that parts that were left as they were were rapidly disintegrated.
この発明は、以上の通りの事情に鑑みてなされたもので
あり、従来の鏡吹き吹付工法の欠点を解消し、空気接触
崩壊性もしくは膨張性地山の切羽部位における崩壊を効
果的に抑止することかでき、しかも簡便で低コストな新
しい切羽安定工法を提供することを目的としている。This invention was made in view of the above-mentioned circumstances, and eliminates the drawbacks of the conventional mirror blowing method and effectively prevents collapse at the face of air-contact collapsible or expansible ground. The purpose of this project is to provide a new face stabilization method that is simple, low-cost, and easy to use.
（課題を解決するだめの手段）
この発明は、上記の課題を解決するものとして、トンネ
ル掘削の切羽において、空気崩壊性または膨張性切羽面
に皮膜養生材を吹付けて崩壊を抑止することを特徴とす
るトンネル切羽の吹付養生工法を提供する。(Means for Solving the Problems) This invention solves the above problems by spraying a film curing material on the air-collapsible or expansible face surface of a tunnel excavation face to suppress collapse. We provide a unique spray curing method for tunnel faces.
さらに、この発明は、エアレスカン等の簡便な塗装機ま
たは吹付機を掘削機に搭載し、掘削後直ちに皮膜養生材
を吹付りることを好ましい態様としてもいる。Furthermore, in a preferred embodiment of the present invention, a simple coating or spraying machine such as an airless can is mounted on the excavator, and the coating curing material is sprayed immediately after excavation.
皮膜養生材は、切羽面に対して直接吹付けるが、その最
も大きな作用は、切羽面とトンネル内の空気との接触を
遮断し、切羽面の崩壊を抑止することにある。The film curing material is sprayed directly onto the face, and its most important effect is to prevent the face from collapsing by blocking contact between the face and the air in the tunnel.
皮膜養生材としては、樹脂、アスファルト系などが使用
できるか、たとえは、アスファルト系エマルジョン、ラ
テックス、樹脂エマルジョンか好ましいものとして例示
される。このうちの樹脂エマルジョンとしては、酢酸ビ
ニル系エマルジョン、エチレン酢酸ビニル共重合系エマ
ルジョン、アクリル系エマルジョン、塩化ビニル共重合
系エマルジョン、弗素樹脂系エマルジョンなどを使用す
ることができる。As the film curing material, resin, asphalt type, etc. can be used, and preferable examples include asphalt type emulsion, latex, and resin emulsion. Among these resin emulsions, vinyl acetate emulsions, ethylene vinyl acetate copolymer emulsions, acrylic emulsions, vinyl chloride copolymer emulsions, fluororesin emulsions, etc. can be used.
エマルジョンとは異なる樹脂溶液は、溶剤を使用するこ
とからトンネル内での皮ＦＡ養生材としてはあまり好ま
しくない。Resin solutions different from emulsions are not very preferred as skin FA curing materials in tunnels because they use solvents.
これらの皮膜養生材は、トンネル掘削の施工地山の状況
に応じて、その遣ＷＡ牲、崩壊抑止性、耐久性、耐水性
等を考慮して選択すればよい。もちろん、上記のものを
単独で、あるいは仙合わせて使用してもよい。アスファ
ルト系エマルジョンと樹脂系エマルジョンの組合せも有
効である。These film curing materials may be selected depending on the condition of the ground where tunnel excavation is to be carried out, taking into account its WA efficiency, collapse prevention properties, durability, water resistance, etc. Of course, the above may be used alone or in combination. A combination of asphalt emulsion and resin emulsion is also effective.
皮膜は、吹付量５００〜２０００ｇ／ｒｒｌ’、もしく
はそれ以上または以下において使用することができる。The coating can be used at a spray rate of 500 to 2000 g/rrl', or higher or lower.
実際の施工においては、エアレスガン等の簡便な塗装機
または吹付機を使用することができ、しかもロードヘッ
ダー等の掘削機に携帯用エアレスガンを搭載することに
より、掘削直後の切羽面に皮膜養生材を吹付けることが
できる。この直後の吹付けにより、効果はより大きなも
のとなる。In actual construction, a simple paint or spray machine such as an airless gun can be used, and by mounting a portable airless gun on an excavator such as a road header, a film curing material can be applied to the face immediately after excavation. Can be sprayed. By spraying immediately after this, the effect will be even greater.
（実施例）
一軸圧縮強度σ。−１０ｂｇ／−と非常に小さく、地山
強度比０．２〜０．３の風化してボロボロとなる膨張性
地山においてトンネル掘削を行った。(Example) Unconfined compressive strength σ. Tunnel excavation was carried out in a weathered and crumbling expansible rock with a very small mass of -10 bg/- and a rock strength ratio of 0.2 to 0.3.
ロードヘッダーにエアレスガンを取イ１け、このガンを
用いて掘削後直に切羽面に皮膜養生材を吹付けた。吹付
量は１０００ｇ／ｒｒｉ’とした。An airless gun was installed in the road header, and the film curing material was sprayed onto the face immediately after excavation using this gun. The spraying amount was 1000g/rri'.
この時の皮膜養生材の種類による特徴を評価し、その結
果を示したものが表１である。At this time, the characteristics of each type of film curing material were evaluated, and Table 1 shows the results.
なお、比較のために従来法によってコンクリートも吹付
けた。For comparison, concrete was also sprayed using the conventional method.
この表１の結果から明らかなように、コンクリートとは
異なる皮膜養生材の使用によって切羽面の崩壊が効果的
に抑止されることがわかる。As is clear from the results in Table 1, it can be seen that the collapse of the face surface is effectively suppressed by using a film curing material different from concrete.
また、エアーガンによる圧縮空気吹付けの場合には、切
羽面からの粉塵および皮膜養生材のミスト飛散が発生し
、好ましくなかった。Furthermore, when compressed air was sprayed using an air gun, dust and film curing mist were scattered from the face surface, which was not desirable.
表１
皮膜形成の評価
（Ａ・・・優良、 Ｂ・・・良、 Ｃ・・・不良）（発
明の効果）
この発明により、風化性および／まなは膨張性地山のト
ンネル掘削における切羽面の崩壊は極めて効果的に防止
される。またこの発明の工法は簡便で、作業性に優れ、
しかも低コストでもある。Table 1 Evaluation of film formation (A...Excellent, B...Good, C...Poor) (Effects of the invention) This invention improves the performance of the face surface in tunnel excavation of weatherable and/or expansive ground. collapse is very effectively prevented. In addition, the construction method of this invention is simple and has excellent workability.
Moreover, it is also low cost.
代理人 弁理士 西 澤 利 夫手続補正書（
自制
訂正明細書Agent Patent Attorney Toshio Nishizawa Procedural Amendment (
self-control correction statement
Claims (5)
膨張性切羽面に皮膜養生材を吹付けて崩壊を抑止するこ
とを特徴とするトンネル切羽の吹付養生工法。(1) A spray curing method for a tunnel face, which is characterized by spraying a film curing material onto the air-collapsible or expandable face of the tunnel excavation face to prevent collapse.
削後直ちに皮膜養生材を吹付ける請求項（１）記載のト
ンネル切羽の吹付養生工法。(2) The spray curing method for a tunnel face according to claim (1), wherein an airless gun is mounted on an excavator and the film curing material is sprayed during or immediately after excavation.
請求項（１）記載のトンネル切羽の吹付養生工法。(3) The spray curing method for a tunnel face according to claim (1), wherein an asphalt-based emulsion is used as the film curing material.
、エチレン酢酸ビニル共重合系エマルジョン、弗素樹脂
エマルジョン、アクリルエマルジョンを皮膜養生材とす
る請求項（１）記載のトンネル切羽吹付養生工法。(4) The tunnel face spray curing method according to claim (1), wherein the film curing material is SBR latex, vinyl acetate emulsion, ethylene vinyl acetate copolymer emulsion, fluororesin emulsion, or acrylic emulsion.
よび／または樹脂エマルジョンを皮膜養生材とする請求
項（１）記載のトンネル切羽の吹付養生工法。(5) The spray curing method for a tunnel face according to claim (1), wherein the film curing material is an asphalt emulsion, latex, and/or resin emulsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1085195A JP2776548B2 (en) | 1989-04-03 | 1989-04-03 | Spray curing method for tunnel excavation surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1085195A JP2776548B2 (en) | 1989-04-03 | 1989-04-03 | Spray curing method for tunnel excavation surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02266098A true JPH02266098A (en) | 1990-10-30 |
| JP2776548B2 JP2776548B2 (en) | 1998-07-16 |
Family
ID=13851866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1085195A Expired - Fee Related JP2776548B2 (en) | 1989-04-03 | 1989-04-03 | Spray curing method for tunnel excavation surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2776548B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07259493A (en) * | 1994-02-07 | 1995-10-09 | Yoshizawa Sogo Bosui:Kk | Construction enginnering and waterproof engineering of tunnel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4788278B2 (en) * | 2005-10-13 | 2011-10-05 | 株式会社大林組 | Stabilization method of tunnel excavation surface |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719278A (en) * | 1980-07-02 | 1982-02-01 | Sumitomo Heavy Industries | Detector for swing of freight |
| JPS61266796A (en) * | 1985-05-21 | 1986-11-26 | 鹿島建設株式会社 | Method of stabilization construction of wall surface of soilsand tunnel having low degree of consolidation |
-
1989
- 1989-04-03 JP JP1085195A patent/JP2776548B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719278A (en) * | 1980-07-02 | 1982-02-01 | Sumitomo Heavy Industries | Detector for swing of freight |
| JPS61266796A (en) * | 1985-05-21 | 1986-11-26 | 鹿島建設株式会社 | Method of stabilization construction of wall surface of soilsand tunnel having low degree of consolidation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07259493A (en) * | 1994-02-07 | 1995-10-09 | Yoshizawa Sogo Bosui:Kk | Construction enginnering and waterproof engineering of tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2776548B2 (en) | 1998-07-16 |
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