JPH0197797A - How to receive propulsion reaction force in cast-in-place shield construction method - Google Patents
How to receive propulsion reaction force in cast-in-place shield construction methodInfo
- Publication number
- JPH0197797A JPH0197797A JP62254280A JP25428087A JPH0197797A JP H0197797 A JPH0197797 A JP H0197797A JP 62254280 A JP62254280 A JP 62254280A JP 25428087 A JP25428087 A JP 25428087A JP H0197797 A JPH0197797 A JP H0197797A
- Authority
- JP
- Japan
- Prior art keywords
- reaction force
- cast
- propulsion reaction
- construction method
- inner formwork
- 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
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
所要強度の発現した覆工部分で、覆工部のコンクリート
面と内型枠の背面部との摩擦係数を増大させるか内型枠
などを外側（半径方向）へ押し出すことにより内型枠と
コンクリートとの摩擦力を増大させ推進反力を確保させ
るようにした発明である。[Detailed description of the invention] [Field of industrial application] In the lining part where the required strength has been developed, the coefficient of friction between the concrete surface of the lining part and the back part of the inner formwork is increased or the inner formwork etc. This invention increases the frictional force between the inner formwork and the concrete by extruding it outward (in the radial direction), thereby ensuring a propulsion reaction force.
従来、現場打ちシールド工法の推進反力は型枠を介して
コンクリートへ伝達しているものであるが、しかし通常
の型枠とコンクリートの摩擦力は推進反力を受けるため
には十分とは言えないものである。Conventionally, the propulsion reaction force of the cast-in-place shield construction method is transmitted to the concrete through the formwork, but the frictional force between the ordinary formwork and concrete is not sufficient to receive the propulsion reaction force. It's something that doesn't exist.
現場打ちシールド工法の推進反力を型枠を介してコンク
リートへ伝達して推進反力を取っても通常の型枠とコン
クリートの摩擦力では推進反力を受けるためには十分と
は言えないとゆう問題点を解決しようとする発明である
。Even if the propulsion reaction force of the cast-in-place shield construction method is transferred to the concrete through the formwork to absorb the propulsion reaction force, the normal frictional force between the formwork and concrete is not sufficient to absorb the propulsion reaction force. This is an invention that attempts to solve these problems.
所要強度の発現した覆工部分において、覆工部のコンク
リート面と内型枠の背面部との摩擦力を増大させること
によって内型枠の先端に設置したシールドジヤツキに対
する推進反力を確保することにより問題点を解決したも
のである。In the lining part where the required strength has been achieved, by increasing the frictional force between the concrete surface of the lining part and the back surface of the inner formwork, a propulsion reaction force against the shield jack installed at the tip of the inner formwork is secured. This solved the problem.
内型枠の背面にゴム板等の摩擦係数の大きい部材を張着
しコンクリートと内型枠の背面との摩擦力を増大させて
推進反力を確保するか、コンクリートの所要強度が発現
した部分の内側の内型枠を半径方向よりジヤツキ等を用
いて内型枠に外側に押し出すような力を与えコンクリー
トと内型枠の背面との摩擦力を増大させて推進反力を確
保して内型枠の先端に設けたシールドジヤツキを推進さ
せシールドマシンを推進させるものである。Either attach a member with a high friction coefficient such as a rubber plate to the back of the inner formwork to increase the frictional force between the concrete and the back of the inner formwork, and secure the propulsion reaction force, or the part where the concrete has achieved the required strength. Apply force to push the inner formwork outward from the radial direction using jacks, etc. to increase the frictional force between the concrete and the back of the inner formwork to secure a propulsive reaction force and move the inner formwork outward. The shield machine is propelled by propelling the shield jack installed at the tip of the formwork.
第１図に示すものは内型枠（１）の背面にゴム板等の摩
擦係数の大きい部材（２）を張着し、所要強度の発現後
コンクリ−） （３）と内型枠（１）の背面との摩擦力
を増大させて推進反力を確保し内型枠（１）の先端に設
けたシールドジヤツキ（４）を推進させシールドマシン
（５）を推進させるようにしたものである。第２図の場
合はコンク！ｊ −） （３）の所要強度が発現した部
分の内側の内型枠（１）を半径方向よりジヤツキ等の拡
大機（６）を用いて内型枠（！）に外側に押し出すよう
な力を与えコンクリート（３）と内型枠（ＩＪの背面と
の摩擦力を増大させて推進反力を確保し内型枠（１）の
先端に設けたシールドジヤツキ（４）を推進させシール
ドマシン（５）を推進させるものである。尚（力はシー
ルドテール、（８）はプレスジヤツキ、（９）は若材令
部を示すものである。In the case shown in Figure 1, a member (2) with a large friction coefficient such as a rubber plate is pasted on the back of the inner formwork (1), and after the required strength is developed, concrete (3) and inner formwork (1) are attached. ) by increasing the frictional force with the back surface of the machine to secure a propulsion reaction force and propel the shield jack (4) provided at the tip of the inner formwork (1) to propel the shield machine (5). be. In the case of Figure 2, Conch! j −) A force that pushes the inner formwork (1) inside the part where the required strength of (3) has been expressed outward from the radial direction using an expanding machine (6) such as a jack The shield machine increases the frictional force between the concrete (3) and the back of the inner formwork (IJ) to secure the propulsion reaction force and propels the shield jack (4) installed at the tip of the inner formwork (1). It propels (5). Note that (force) is a shield tail, (8) is a press jack, and (9) is a young material.
フレッシュコンクリートに推進反力をとるものより摩擦
力により推進反力を伝達する内型枠数が少な（てすみ、
突起を付けたもののように後工程の補修が不要である。The number of inner forms that transmit the propulsive reaction force through frictional force is smaller than those that transfer the propulsive reaction force to fresh concrete (Tesumi,
Unlike those with protrusions, there is no need for post-process repairs.
第１図は第１実施例のシールドの断面図、第２図は第２
実施例のシールドの断面図を示すものである。Figure 1 is a sectional view of the shield of the first embodiment, and Figure 2 is a cross-sectional view of the shield of the first embodiment.
FIG. 3 is a cross-sectional view of a shield according to an example.
Claims (1)
コンクリート面と内型枠の背面部との摩擦力を増大させ
ることによって内型枠の先端に設置したシールドジャッ
キに対する推進反力を確保することを特徴とする現場打
ちシールド工法に於ける推進反力受け方法(1) In the lining section where the required strength has been achieved, the propulsive reaction force against the shield jack installed at the tip of the inner formwork is reduced by increasing the frictional force between the concrete surface of the lining section and the back surface of the inner formwork. A method for receiving propulsion reaction force in the cast-in-place shield construction method, which is characterized by securing
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62254280A JPH0197797A (en) | 1987-10-08 | 1987-10-08 | How to receive propulsion reaction force in cast-in-place shield construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62254280A JPH0197797A (en) | 1987-10-08 | 1987-10-08 | How to receive propulsion reaction force in cast-in-place shield construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197797A true JPH0197797A (en) | 1989-04-17 |
Family
ID=17262772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62254280A Pending JPH0197797A (en) | 1987-10-08 | 1987-10-08 | How to receive propulsion reaction force in cast-in-place shield construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197797A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587800A (en) * | 1981-07-07 | 1983-01-17 | 新明和工業株式会社 | Electrode gap adjustment device in high-power pulsed particle beam generator |
-
1987
- 1987-10-08 JP JP62254280A patent/JPH0197797A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587800A (en) * | 1981-07-07 | 1983-01-17 | 新明和工業株式会社 | Electrode gap adjustment device in high-power pulsed particle beam generator |
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