JPH0657999U - Isolation sheet - Google Patents
Isolation sheetInfo
- Publication number
- JPH0657999U JPH0657999U JP398993U JP398993U JPH0657999U JP H0657999 U JPH0657999 U JP H0657999U JP 398993 U JP398993 U JP 398993U JP 398993 U JP398993 U JP 398993U JP H0657999 U JPH0657999 U JP H0657999U
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- woven fabric
- lining
- synthetic resin
- attached
- 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
Links
Abstract
(57)【要約】
【目的】 ＮＡＴＭによるトンネルの建設に際して、一
次覆工と二次覆工との間に介在させるアイソレ−ション
シ−トであって、強度が高い上に安価で経済的であり、
軽量で取り扱いやすく、簡易に防水の可能なアイソレ−
ションシ−トを提供する。
【構成】 発泡ポリエチレ−トのような柔軟な合成樹脂
独立発泡体シ−トの片面に不織布を貼着し、同じく他面
に展伸性を有する補強シ−トを貼着して、アイソレ−シ
ョンシ−トを構成し、前記補強シ−ト側を一次覆工面に
当て、不織布面に二次覆工を施工するようにした。
(57) [Summary] [Purpose] This is an isolation sheet that is interposed between the primary and secondary linings when constructing a tunnel using NATM. It is strong, inexpensive, and economical. ,
Lightweight, easy to handle, easily waterproof
Offering a meeting sheet. [Structure] A non-woven fabric is adhered to one surface of a flexible synthetic resin independent foam sheet such as foamed polyethylene, and a reinforcing sheet having extensibility is also adhered to the other surface to form an isolator. A construction sheet was constructed, the reinforcing sheet side was applied to the primary lining surface, and the secondary lining was applied to the non-woven fabric surface.
Description
【０００１】[0001]
本考案はＮＡＴＭによりトンネルを建設する際に、二次覆工のヒビ割れ防止の ために、一次覆工と二次覆工との間に介在させて取付けるアイソレ−ションシ− トに関するものである。 The present invention relates to an isolation sheet to be installed between a primary lining and a secondary lining in order to prevent cracking of the secondary lining when constructing a tunnel by NATM.
【０００２】[0002]
一般に、ＮＡＴＭによるトンネルの建設に際しては、ア−チ状に掘削した地山 の表面にコンクリ−トの吹き付けにより一次覆工を施工し、その表面にアイソレ −ションシ−トを貼着した後、二次覆工を施工している。 Generally, when constructing a tunnel by NATM, a primary lining is constructed by spraying concrete onto the surface of the ground excavated in an arch shape, and after the isolation sheet is attached to the surface, Next lining is under construction.
【０００３】 而して、従来、上記のアイソレ−ションシ−トとしては、発泡ポリエチレン シ−ト、不織布、ＥＶＡシ−トが用いられている。然し乍ら、の発泡ポリ エチレンシ−トは、安価で経済性はよいが、強度上難点があり、二次覆工打設時 に破れることが多い。そのため、表面に展伸性を有するクロス等のシ−トを補強 用に貼着したものもあるが、強度上の問題を充分解決するにはいたっていない。 また、の不織布は通水性があるため、防水効果を期待出来ないので、漏水や滴 水のおそれがあるトンネルには適用出来ない。一方、のＥＶＡシ−トは強度的 にはの発泡ポリエチレンより優れているが、それでも二次覆工打設時に破れる おそれがあるばかりでなく、シ−ト自体が高価なため、経済的でないという問題 点がある。Conventionally, a foamed polyethylene sheet, a non-woven fabric, or an EVA sheet has been used as the isolation sheet. However, the foamed polyethylene sheet is inexpensive and economical, but has a difficulty in strength and often breaks when the secondary lining is cast. For this reason, there is a sheet having a stretchable cloth or the like attached to the surface for reinforcement, but it has not been enough to solve the problem of strength. Also, since the non-woven fabric is water-permeable, it cannot be expected to have a waterproof effect, so it cannot be applied to tunnels where there is a risk of water leakage or drip. On the other hand, the EVA sheet is superior to the expanded polyethylene in terms of strength, but it is not economical because it is not only fragile when the secondary lining is cast, but also the sheet itself is expensive. There is a problem.
【０００４】[0004]
本考案は上記のような従来技術に鑑み、強度が高い上に安価で経済的であり、 軽量で取り扱いやすく、簡易に防水の可能なアイソレ−ションシ−トを提供する ことを、その課題とするものである。 In view of the above-mentioned conventional techniques, the present invention has an object to provide an isolation sheet which has high strength, is inexpensive and economical, is lightweight and easy to handle, and can be easily waterproofed. It is a thing.
【０００５】[0005]
【課題を解決するための手段】 本考案は上記課題を解決することを目的としてなされたもので、その構成は、 合成樹脂独立発泡体シ−トの片面に不織布を貼着し、同じく他面に展伸性を有す る補強シ−トを貼着して成り、前記補強シ−ト側を一次覆工面に当て、不織布面 に二次覆工を施工するようにしたこと特徴とするものである。Means for Solving the Problems The present invention has been made for the purpose of solving the above-mentioned problems, and has a structure in which a non-woven fabric is attached to one side of a synthetic resin independent foam sheet and the other side is also the same. It is characterized in that a reinforced sheet having extensibility is adhered to the first lining surface, the reinforcing sheet side is applied to the primary lining surface, and the secondary lining is applied to the non-woven fabric surface. Is.
【０００６】 即ち、本考案の考案者らは、上記のような問題点のないアイソレ−ションシ− トを開発するため、研究を重ねた結果、発泡ポリエチレンシ−トのような合成樹 脂独立発泡体シ−トの防水性及び経済性と、不織布の柔軟性を利用すると共に、 展伸性のある補強シ−トにより前記合成樹脂独立発泡体シ−トの強度不足を補う ような構造にして、不織布の上に二次覆工を施工するようにすれば、満足すべき アイソレ−ションシ−ト効果を得られることを知得し、本考案を成し遂げたので ある。That is, the inventors of the present invention have conducted extensive research to develop an isolation sheet that does not have the above-mentioned problems, and as a result, a synthetic resin independent foam such as a foamed polyethylene sheet has been obtained. Utilizing the waterproofness and economic efficiency of the body sheet and the flexibility of the non-woven fabric, the reinforced stretchable sheet has a structure that compensates for the insufficient strength of the synthetic resin independent foam sheet. Therefore, they realized that a satisfactory isolation sheet effect could be obtained by applying a secondary lining on the non-woven fabric, and accomplished the present invention.
【０００７】[0007]
次に本考案の実施例を図により説明する。図１は本考案の一例の断面拡大図、 図２は図１のシ−トを介在させたトンネルの断面図である。 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged cross-sectional view of an example of the present invention, and FIG. 2 is a cross-sectional view of a tunnel in which the sheet of FIG. 1 is interposed.
【０００８】 図において、Ａは、発泡ポリエチレンシ−トから成る合成樹脂独立発泡体シ− ト１の片面に不織布２を貼着し、他面に展伸性のある展伸クロス等から成る補強 シ−ト３を貼着して構成した本考案の一例のアイソレ−ションシ−トである。な お、前記合成樹脂独立発泡体シ−ト１の厚さは１〜２mm、不織布２の厚さは1.5 〜３mm程度とし、補強シ−ト３は展伸性があり強度的にすぐれたものであれば、 薄いものでよい。また、この補強シ−ト３は通常、合成樹脂独立発泡体シ−ト１ に全面的に貼着してもよいが、スポット貼着するようにしてもよい。In the figure, A is a synthetic resin independent foam sheet 1 made of expanded polyethylene sheet, and a non-woven fabric 2 attached to one side thereof, and a reinforced cloth made of extensible cloth or the like on the other side. 1 is an isolation sheet of an example of the present invention constructed by attaching a sheet 3. The synthetic resin independent foam sheet 1 has a thickness of 1 to 2 mm and the non-woven fabric 2 has a thickness of about 1.5 to 3 mm, and the reinforcing sheet 3 has extensibility and excellent strength. If so, it can be thin. The reinforcing sheet 3 may be generally attached to the synthetic resin independent foam sheet 1 over the entire surface, or may be attached by spot.
【０００９】 このアイソレ−ションシ−トＡは、補強シ−ト３側をトンネル状に掘削した地 山Ｔに施したトンネルの一次覆工４の表面に当ててコンクリ−ト釘等により取付 け、不織布２の表面に二次覆工５を打設するのであるが、不織布２は一次覆工４ の表面に凹凸があっても、それに良く馴染んで補強シ−ト３を一次覆工４に当接 させるばかりでなく、二次覆工５の打設時に表面にセメント粉が殆ど侵入せず、 水分のみを良く流下させて排水できるので、ヒビ割れの生じない良好なコンクリ ト壁面を形成することが出来る。また、合成樹脂独立発泡体シ−ト１はその表面 に貼着した補強シ−ト３により強度が高くなり、一次覆工４面に凹凸があっても 、二次覆工５のコンクリ−トの打設圧により破れるようなおそれはない。The isolation sheet A is attached to the surface of the primary lining 4 of the tunnel formed on the ground T excavated in a tunnel shape on the side of the reinforcing sheet 3 by attaching concrete nails or the like. The secondary lining 5 is placed on the surface of the non-woven fabric 2. The non-woven fabric 2 fits well on the surface of the primary lining 4 even if the surface of the primary lining 4 is uneven, and the reinforcing sheet 3 is applied to the primary lining 4. Not only do they come into contact with each other, but when the secondary lining 5 is placed, almost no cement powder penetrates into the surface, allowing only water to flow down well and draining, so form a good concrete wall surface without cracks. Can be done. Further, the synthetic resin independent foam sheet 1 has a higher strength due to the reinforcing sheet 3 attached to the surface thereof, and even if the surface of the primary lining 4 has irregularities, the concrete of the secondary lining 5 is made of There is no danger of breaking due to the driving pressure.
【００１０】 一方、建設されるトンネルに漏水のおそれがある場合は、アイソレ−ションシ −トＡを一次覆工４に取付けた後、裏面に面ファスナの雄部材を点在させて貼着 した防水シ−トを、前記雄部材を不織布２に絡着させて貼着し、防水シ−トの表 面に二次覆工５を打設するようにすれば良い。こうすることにより、防水性の高 いトンネルを建設することが出来るのである。On the other hand, when there is a risk of water leakage in the tunnel to be constructed, after the isolation sheet A is attached to the primary lining 4, waterproofing is performed by attaching male members of hook and loop fasteners on the back surface. The sheet may be attached by entwining the male member with the non-woven fabric 2 and placing the secondary lining 5 on the surface of the waterproof sheet. By doing this, it is possible to construct a highly waterproof tunnel.
【００１１】[0011]
本考案は上述のとおりであって、合成樹脂独立発泡体シ−トの片面に不織布を 貼着する一方、他面に展伸性のある補強シ−トを取付けてアイソレ−ションシ− トを構成したから、従来弱いとされていた合成樹脂発泡体シ−トの強度は向上す るばかりでなく、また、不織布は、その表面に二次覆工コンクリ−トを打設して も、打設圧により不織布が破れるおそれはなく、その通水性により、コンクリ− トの水分を流下させて排水できるので、ヒビ割れの生じない良好なコンクリ−ト 壁を形成出来、アイソレ−ション効果は極めて良好なものとなる。 The present invention is as described above, and the non-woven fabric is attached to one side of the synthetic resin independent foam sheet, while the extensibility reinforcing sheet is attached to the other side to form the isolation sheet. Therefore, not only the strength of the synthetic resin foam sheet, which has been considered weak in the past, is improved, but also the non-woven fabric is cast even if the secondary lining concrete is cast on the surface. There is no risk of the nonwoven fabric breaking due to pressure, and the water permeability of the nonwoven fabric allows the concrete water to flow down and drain, so that a good concrete wall without cracking can be formed, and the isolation effect is extremely good. Will be things.
【００１２】 更に、全体として柔軟で適宜の嵩が得られるところから、取り扱いやすく、一 次覆工への貼着作業を能率良く施工できるし、また、トンネルに漏水や適水のお それがある場合にも、不織布面を利用して、簡易に防水シ−トを貼着することに より、防水対策を講じることが出来る。[0012] Furthermore, since it is flexible as a whole and has an appropriate bulk, it is easy to handle, the work of attaching it to the primary lining can be efficiently constructed, and there is water leakage or suitable water in the tunnel. In such a case, it is possible to take a waterproof measure by simply attaching the waterproof sheet by using the non-woven fabric surface.
【図１】本考案の一例の断面拡大図。FIG. 1 is an enlarged cross-sectional view of an example of the present invention.
【図２】図１のシ−トを介在させたトンネルの断面図。FIG. 2 is a cross-sectional view of a tunnel with the sheet of FIG. 1 interposed.
１ 合成樹脂独立発泡体シ−ト ２ 不織布 ３ 補強シ−ト ４ 一次覆工 ５ 二次覆工 1 Synthetic resin independent foam sheet 2 Nonwoven fabric 3 Reinforcement sheet 4 Primary lining 5 Secondary lining
Claims (1)
布を貼着し、同じく他面に展伸性を有する補強シ−トを
貼着して成り、前記補強シ−ト側を一次覆工面に当て、
不織布面に二次覆工を施工するようにしたこと特徴とす
るアイソレ−ションシ−ト。1. A synthetic resin independent foam sheet having a non-woven fabric attached to one side thereof and a reinforcing sheet having extensibility attached to the other side thereof, the reinforcing sheet side being the primary side. Hit the lining surface,
An isolation sheet characterized in that a secondary lining is constructed on the non-woven fabric surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP398993U JPH0657999U (en) | 1993-01-19 | 1993-01-19 | Isolation sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP398993U JPH0657999U (en) | 1993-01-19 | 1993-01-19 | Isolation sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0657999U true JPH0657999U (en) | 1994-08-12 |
Family
ID=11572434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP398993U Pending JPH0657999U (en) | 1993-01-19 | 1993-01-19 | Isolation sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0657999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017106252A (en) * | 2015-12-10 | 2017-06-15 | 戸田建設株式会社 | Lining concrete structure in mountain tunnel and composite functional sheet for that purpose |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62128748A (en) * | 1985-11-29 | 1987-06-11 | 藤森工業株式会社 | Waterproof sheet |
-
1993
- 1993-01-19 JP JP398993U patent/JPH0657999U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62128748A (en) * | 1985-11-29 | 1987-06-11 | 藤森工業株式会社 | Waterproof sheet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017106252A (en) * | 2015-12-10 | 2017-06-15 | 戸田建設株式会社 | Lining concrete structure in mountain tunnel and composite functional sheet for that purpose |
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