PIPE SUPPORT DEVICE FOR SHEATH PIPE JACKING METHOD AND SHEATH PIPE JACKING METHOD

• Main Authors: MORITA NOBUHIKO, FUJITA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 19.07.2022
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a pipe support device which prevents self-propelling of a new pipe in a sheath pipe and enables smooth insertion of the new pipe, and to provide a sheath pipe jacking method.SOLUTION: A pipe support device has friction members 2 which are provided so as to be attachable to or detachable from a new pipe P and generate frictional force that causes insertion resistance of the new pipe P on an inner surface of a sheath pipe P'. Each friction member 2 protrudes to the radial outer side of the new pipe P farther than a caster 3 for reducing the insertion resistance or is located at the same radial position as the caster 3 to be slidable on the inner surface of the sheath pipe P' when the friction member 2 is attached to the new pipe P. A sheath pipe jacking method includes: a step in which the friction members 2 and the casters 3 are attached to the new pipe P and the new pipe P is inserted into the sheath pipe P' having a downward inclination in a state that each friction member 2 protrudes to the radial outer side of the new pipe P farther than the caster 3 or is located at the same radial position as the caster 3; and a step in which the friction members 2 are removed from the new pipe P and the casters 3 are placed in contact with the inner surface of the sheath pipe P' and roll on the inner surface to insert the new pipe P further as the insertion resistance increases.SELECTED DRAWING: Figure 1 【課題】さや管内での新管の自走を防止し、この新管の挿入をスムーズに行うことが可能な管支持装置およびさや管推進工法を提供する。【解決手段】新管Ｐに着脱可能に設けられ、さや管Ｐ'の内面との間で新管Ｐの挿入抵抗となる摩擦力を生じさせる摩擦部材２を有し、摩擦部材２は、新管Ｐへの装着状態において、挿入抵抗を低減するキャスタ３よりも新管Ｐの径方向外側に突出して、または、キャスタ３と同じ径方向位置となって、さや管Ｐ'の内面に摺動可能となる構成、および、新管Ｐに摩擦部材２とキャスタ３とを取り付け、摩擦部材２がキャスタ３よりも新管Ｐの径方向外側に突出した状態、または、キャスタ３と同じ径方向位置とした状態で、下り傾斜を有するさや管Ｐ'に挿入する工程と、挿入抵抗の増大に伴って、摩擦部材２を新管Ｐから取り外し、キャスタ３をさや管Ｐ'の内面に接触転動させて新管Ｐをさらに挿入する工程と、を有する構成とする。【選択図】図１