JPH0882192A - Cushion material for concrete propulsion pipe - Google Patents
Cushion material for concrete propulsion pipeInfo
- Publication number
- JPH0882192A JPH0882192A JP6236074A JP23607494A JPH0882192A JP H0882192 A JPH0882192 A JP H0882192A JP 6236074 A JP6236074 A JP 6236074A JP 23607494 A JP23607494 A JP 23607494A JP H0882192 A JPH0882192 A JP H0882192A
- Authority
- JP
- Japan
- Prior art keywords
- cushion material
- propulsion pipe
- cushion
- pipe
- propulsion
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
(57)【要約】
【目的】 クッション材設置時の位置決めを容易にし、
更に貼り合わせ時のズレをも防止し、著しく作業性を向
上させるコンクリート推進管用クッション材を提供す
る。
【構成】 複数でリングを形成する発泡ポリスチレン製
クッション材において、外周部に二つの突起１を設けた
コンクリート推進管用クッション材。
(57) [Summary] [Purpose] To facilitate positioning when installing cushioning material,
Further, the present invention provides a cushioning material for a concrete propulsion pipe, which prevents a deviation at the time of pasting and remarkably improves workability. A cushion material for a concrete propulsion pipe, in which a plurality of foamed polystyrene cushion materials form a ring and two protrusions 1 are provided on an outer peripheral portion of the cushion material.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、推進工法において推進
管の継ぎ目に使用されるクッション材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion material used at a joint of a propulsion pipe in a propulsion method.
【０００２】[0002]
【従来の技術】推進工法に使用するクッション材として
は、発泡ポリスチレン製、合板製、パーティクルボード
製のもの等が利用されているが、これらのうちでも、発
泡倍率を変えることにより任意の潰れ特性を実現できる
という特異的特徴を有する発泡ポリスチレン製のクッシ
ョン材が多用されている（特公昭６１−８３２０号公報
等）。2. Description of the Related Art As a cushioning material used in the propulsion method, expanded polystyrene, plywood, particle board, etc. are used. Among them, the crushing property can be changed by changing the expansion ratio. Cushion materials made of expanded polystyrene, which have the unique feature of being able to realize the above, are often used (Japanese Patent Publication No. 61-8320).
【０００３】しかしながら、発泡ポリスチレン製のクッ
ション材は、推進時にポアソン比に伴う潰れにより膨ら
み変形を生じるため、径方向の幅及び取り付け位置を適
度に調節しないと推進管よりはみ出すという問題があっ
た。即ち、図４は推進管の接続部分の断面図であるが、
推進管１１外周部でのクッション材１２のはみ出し部１
４は推進管１１外周に設けられた埋め込みカラー１４を
変形させる、また推進管１１内周部でのはみ出し部１５
は推進管１１内の流体の流れを阻害する、推進管１１内
周のモルタル詰め代１６をなくす等の問題があった。従
って、従来からクッション材の径方向の幅を推進管の管
壁厚より小さくし、管断面よりはみ出さないように位置
決めを行い、クッション材を設置していた。However, since the expanded polystyrene cushion material is bulged and deformed due to crushing associated with the Poisson's ratio during propulsion, there is a problem that the cushion material sticks out of the propulsion tube unless the radial width and the mounting position are properly adjusted. That is, FIG. 4 is a sectional view of the connecting portion of the propulsion pipe,
Protrusion portion 1 of cushion material 12 at the outer peripheral portion of propulsion pipe 11
4 deforms the embedded collar 14 provided on the outer periphery of the propulsion pipe 11, and the protruding portion 15 on the inner peripheral portion of the propulsion pipe 11.
Had problems such as obstructing the flow of fluid in the propulsion pipe 11 and eliminating the mortar filling space 16 on the inner circumference of the propulsion pipe 11. Therefore, conventionally, the width of the cushion member in the radial direction is made smaller than the wall thickness of the propulsion pipe, and the cushion member is installed by positioning so as not to protrude from the pipe cross section.
【０００４】[0004]
【発明が解決しようとする課題】ところで、推進管の外
径は通常２５０φから３０００φであり、外径の小さな
推進管の場合にはリング状のクッション材を一体成形で
得ることができ、位置決めの必要はあるもののさほどの
困難性はない。しかし、推進管の外径が１０００φを越
えるような大きな推進管の場合には、リング状のクッシ
ョン材を一体で成形することは困難であり、複数に分割
して成形し、図５に示すように使用時に管断面に接着剤
等で貼り合わせるのが一般的である。尚、図５において
２１は推進管、２２はクッション材、２３は埋め込みカ
ラーである。従って、貼り合わせ時にそれぞれのクッシ
ョン材２２を管断面よりはみ出さないように位置決めを
するのに非常な熟練を要し、しかもズレを防止するため
接着剤が乾くまで押さえつけていなければならない等の
労力を要し、作業能率が悪いという問題があった。By the way, the outer diameter of the propulsion pipe is usually 250φ to 3000φ, and in the case of a propulsion pipe having a small outer diameter, a ring-shaped cushioning material can be obtained by integral molding, and positioning can be performed. It is necessary but not so difficult. However, in the case of a large propelling pipe having an outer diameter of more than 1000φ, it is difficult to integrally form the ring-shaped cushioning material, and it is divided into a plurality of parts and formed as shown in FIG. In general, when used, it is generally adhered to the cross section of the pipe with an adhesive or the like. In FIG. 5, 21 is a propulsion pipe, 22 is a cushion material, and 23 is an embedded collar. Therefore, it takes a great deal of skill to position each cushion member 22 so that it does not stick out of the cross section of the pipe when they are attached, and moreover, it is necessary to hold down the adhesive until the adhesive dries in order to prevent displacement. However, there was a problem that work efficiency was poor.
【０００５】本発明はかかる問題点に鑑み、推進管の外
径が１０００φを越えるような大きな推進管においてさ
え、容易な位置決めが可能で作業効率を著しく向上させ
るコンクリート推進管用クッション材を提供することを
目的とする。In view of the above problems, the present invention provides a cushioning material for a concrete propelling pipe which enables easy positioning even in a large propelling pipe having an outer diameter of more than 1000φ and which can remarkably improve working efficiency. With the goal.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明は複数でリ
ングを形成する発泡ポリスチレン製クッション材におい
て、外周部に少なくとも一つの突起を設けたことを特徴
とするコンクリート推進管用クッション材である。That is, the present invention is a cushion material for concrete propelling pipe, characterized in that, in a cushion material made of expanded polystyrene having a plurality of rings, at least one protrusion is provided on the outer peripheral portion.
【０００７】[0007]
【作用】本発明のコンクリート推進管用クッション材
は、その外周部の突起を推進管外周部に設けられた埋め
込みカラーに接触させることにより位置決めが容易にで
きる。該突起の先端を埋め込みカラーと点接触または線
接触するような形状とすれば、推進時のクッション材の
膨れによって埋め込みカラーを変形させることはない。
また、クッション材の側面に嵌合部を設けることによ
り、貼り合わせ時のズレを防止するするとともに位置決
めをより容易にすることができる。The cushioning material for a concrete propulsion pipe of the present invention can be easily positioned by bringing the protrusions on the outer peripheral portion into contact with the embedded collar provided on the outer peripheral portion of the propulsion pipe. If the tip of the projection is shaped so as to make point contact or line contact with the embedded collar, the embedded collar will not be deformed by the swelling of the cushion material during propulsion.
In addition, by providing the fitting portion on the side surface of the cushion material, it is possible to prevent the displacement at the time of bonding and facilitate the positioning.
【０００８】[0008]
【実施例】以下、図面を用いて本発明を詳細に説明す
る。The present invention will be described in detail below with reference to the drawings.
【０００９】図１は、本発明のクッション材の一実施例
を示す図である。該クッション材は複数を合わせること
により推進管の管断面をなすリングを形成する。また、
突起１を含む径方向の幅Ｘは推進管の管壁厚よりも小さ
くなるように成形される。FIG. 1 is a diagram showing an embodiment of the cushion material of the present invention. A plurality of the cushion members are combined to form a ring having a cross section of the propulsion pipe. Also,
The radial width X including the protrusion 1 is formed to be smaller than the wall thickness of the propulsion pipe.
【００１０】該クッション材の外周部には突起１が設け
られている。突起１は少なくとも一つ設ければよいが、
複数設けることにより更に確実に推進管外周部に沿わせ
ることができる。ただし、あまりに多く設けすぎると埋
め込みカラーにかかる力が大きくなり結局埋め込みカラ
ーを変形させることとなるため好ましくない。かかる観
点より図１に示すように二つの突起１を設けるのが最も
好ましい。A protrusion 1 is provided on the outer peripheral portion of the cushion material. At least one protrusion 1 may be provided,
By providing a plurality, it is possible to more surely follow the outer peripheral portion of the propulsion pipe. However, if too many are provided, the force applied to the embedded collar becomes large, and the embedded collar is eventually deformed, which is not preferable. From this point of view, it is most preferable to provide two protrusions 1 as shown in FIG.
【００１１】また、突起１の形状は特に限定されない
が、その先端部が埋め込みカラーと点接触または線接触
をするような形状とすれば、推進時の膨れによる埋め込
みカラーの変形をより有効に防止できるので好ましい。
突起１の強度、成形の容易さを考慮すれば、例えば図１
に示すような線接触する形状とする方がより好ましい。
図２は、本発明のクッション材の他の実施例を示す図で
ある。側面に嵌合部２を設けているため、隣接するクッ
ション材の嵌合部とはめあわせることができ、貼り合わ
せ後のズレを防止することができる。また、貼り合わせ
時の位置決めを更に容易にすることができる。The shape of the protrusion 1 is not particularly limited. However, if the tip portion of the protrusion 1 makes a point contact or a line contact with the embedded collar, the deformation of the embedded collar due to swelling during propulsion can be prevented more effectively. It is preferable because it is possible.
Considering the strength of the protrusion 1 and the ease of molding, for example, as shown in FIG.
It is more preferable to have a shape of line contact as shown in.
FIG. 2 is a diagram showing another embodiment of the cushion material of the present invention. Since the fitting portion 2 is provided on the side surface, the fitting portion 2 can be fitted to the fitting portion of the adjacent cushion material, and the deviation after the attachment can be prevented. Moreover, the positioning at the time of bonding can be further facilitated.
【００１２】図３は、本発明のクッション材の設置状態
を示す断面図である。図３において３は推進管、４はク
ッション材、５は埋め込みカラーである。クッション材
４は接着剤等で推進管３に接着される。その際、突起１
を埋め込みカラー５に接触させることにより位置決めが
なされる。また、隣接するクッション材同士の嵌合部２
をはめあわせることにより、確実に埋め込みカラー５に
沿ってリングを形成し、接着後のズレが防止される。FIG. 3 is a sectional view showing an installed state of the cushion material of the present invention. In FIG. 3, 3 is a propulsion pipe, 4 is a cushion material, and 5 is an embedded collar. The cushion material 4 is adhered to the propulsion pipe 3 with an adhesive or the like. At that time, protrusion 1
Positioning is performed by contacting the embedded collar 5 with the embedded collar 5. In addition, the fitting portion 2 between the adjacent cushion materials
By fitting the two together, a ring is surely formed along the embedded collar 5, and a deviation after adhesion is prevented.
【００１３】[0013]
【発明の効果】以上説明のように本発明のクッション材
によれば、クッション材設置時の位置決めを容易にし、
更に貼り合わせ時のズレをも防止し、著しく作業性を向
上することができる。また、発泡ポリスチレン製である
ため発泡倍率を変えることにより任意の潰れ特性を実現
できる。更には、複数でリングを形成する分割状態であ
るため保管・輸送に便利であるという利点も有する。As described above, according to the cushion material of the present invention, the positioning at the time of installing the cushion material is facilitated,
Further, it is possible to prevent a deviation at the time of laminating, and to significantly improve workability. Further, since it is made of expanded polystyrene, it is possible to realize arbitrary collapse characteristics by changing the expansion ratio. Further, it has a merit that it is convenient for storage and transportation because it is a divided state in which a plurality of rings are formed.
【図１】本発明の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】本発明の他の実施例を示す図である。FIG. 2 is a diagram showing another embodiment of the present invention.
【図３】本発明のクッション材の設置状態を示す断面図
である。FIG. 3 is a cross-sectional view showing an installed state of the cushion material of the present invention.
【図４】推進管接続部の断面図である。FIG. 4 is a sectional view of a propulsion pipe connection portion.
【図５】従来のクッション材の設置状態を示す断面図で
ある。FIG. 5 is a cross-sectional view showing an installed state of a conventional cushion material.
１ 突起 ２ 嵌合部 ３ 推進管 ４ クッション材 ５ 埋め込みカラー １１，２１ 推進管 １２，２２ クッション材 １３，２３ 埋め込みカラー １４，１５ はみ出し部 １６ モルタル詰め代 DESCRIPTION OF SYMBOLS 1 Protrusion 2 Fitting part 3 Propulsion pipe 4 Cushion material 5 Embedded collar 11,21 Propulsion pipe 12,22 Cushion material 13,23 Embedded collar 14,15 Projection part 16 Mortar filling margin
Claims (2)
ン製クッション材において、外周部に少なくとも一つの
突起を設けたことを特徴とするコンクリート推進管用ク
ッション材。1. A cushion material for a concrete propulsion pipe, wherein in a cushion material made of expanded polystyrene having a plurality of rings, at least one protrusion is provided on an outer peripheral portion.
請求項１記載のコンクリート推進管用クッション材。2. The cushion material for a concrete propulsion pipe according to claim 1, wherein a fitting portion is provided on a side surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23607494A JP3481692B2 (en) | 1994-09-06 | 1994-09-06 | Cushion material for concrete propulsion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23607494A JP3481692B2 (en) | 1994-09-06 | 1994-09-06 | Cushion material for concrete propulsion pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0882192A true JPH0882192A (en) | 1996-03-26 |
| JP3481692B2 JP3481692B2 (en) | 2003-12-22 |
Family
ID=16995338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23607494A Expired - Lifetime JP3481692B2 (en) | 1994-09-06 | 1994-09-06 | Cushion material for concrete propulsion pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3481692B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011105342A1 (en) * | 2010-02-24 | 2011-09-01 | 積水化成品工業株式会社 | Jacking pipe cushioning material, and jacking pipe |
-
1994
- 1994-09-06 JP JP23607494A patent/JP3481692B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011105342A1 (en) * | 2010-02-24 | 2011-09-01 | 積水化成品工業株式会社 | Jacking pipe cushioning material, and jacking pipe |
| JP2011174285A (en) * | 2010-02-24 | 2011-09-08 | Sekisui Plastics Co Ltd | Cushioning material for propelling pipe, and the propelling pipe |
| CN102770622A (en) * | 2010-02-24 | 2012-11-07 | 积水化成品工业株式会社 | Buffer material for pipe jacking and pipe jacking |
| KR101441775B1 (en) * | 2010-02-24 | 2014-09-17 | 세키스이가세이힝코교가부시키가이샤 | Jacking pipe cushioning material, and jacking pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3481692B2 (en) | 2003-12-22 |
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