Abstract: An existing-pipe rehabilitation method for constructing a rehabilitation pipe inside an existing pipe to rehabilitate the existing pipe. A rehabilitation pipe is constructed inside an existing pipe by coupling segments in the circumferential direction and the lengthwise direction of the existing pipe so that the rehabilitation pipe has a constant outer diameter. A lining material impregnated with a liquid curable resin is inserted into the rehabilitation pipe thus constructed. The liquid curable resin is cured to line the internal circumferential surface of the rehabilitation pipe with the lining material so that an inner diameter of the rehabilitation pipe lined with the lining material is smaller than an inner diameter of the existing pipe.

Abstract: An auxiliary tool comprises a body formed of a core material and an elastic cloth covering that covers the surface of the core material. The body is configured for insertion into a pipe ahead of a fluid used to fill the pipe so that during filling of the pipe the flow of the fluid advances the body through the pipe to force out and discharge from the pipe air existing ahead of the body while the body is advanced inside of the pipe.

Abstract: Segments are linked in the circumferential and pipe length directions to assemble a rehabilitating pipe inside an existing pipe in order to rehabilitate the existing pipe. A plurality of nuts are secured to the segments along the circumferential direction thereof. A fastening member having a screw part is provided which is screwed into the nut to fasten a first segment to a second segment to which the nut is secured, thereby linking the first and second segments in the pipe length direction thereof. The position of the nut in the first segment is offset as viewed in the circumferential direction from the nut position of the second segment. The arrangement of the fastening members and the nuts is staggered as viewed in its entirety. This allows the connection strength of the segments in the pipe length direction to be made uniform.

Abstract: A cutting apparatus cuts a lateral wall of a manhole to form a hole on the lateral wall of the manhole. A circular pipe is harmonized with a main pipe and fixedly disposed therein. A rotary ring configured so as to be able to rotate along the periphery of an opening in the manhole about the axial center of the main pipe is mounted on the circular pipe. A pressurized fluid material or pressurized granular material is sprayed from a nozzle held in the rotary ring. The rotary ring is rotated and the lateral wall of the manhole is cut through along the periphery of the opening in the manhole by the fluid material or granular material sprayed from the nozzle. Since the cut portion is shaped as a circle symmetrical about the axial center of the main pipe, it is possible to form a circularly shaped cut-through part centered along the periphery of the opening in the manhole without accidentally breaking or damaging the lateral wall thereof.

Abstract: A lining material has a flexible tubular lining material impregnated with a thermosetting resin and having first and second sides. A first elastic and rigid strip member is removably attached to the first side of the flexible tubular lining material so as to extend along a substantially entire length of the flexible tubular lining material. A second elastic and rigid strip member is removably attached to the second side of the flexible tubular lining material so as to extend along the substantially entire length of the flexible tubular lining material. A third elastic and rigid strip member is attached to one end of the flexible tubular lining material and to the first and second elastic and rigid strip members.

Abstract: To line an inner circumferential surface of side walls of a manhole, a rehabilitating sheet made of a sheet material resistant to water and corrosion is provided in the form of a bag having a shape corresponding to the inner circumferential surface to be lined. The rehabilitating sheet is inserted into the manhole to be lined. Block and plate frames are coupled inside the bag of the rehabilitating sheet to support it so as to have the shape corresponding to the inner circumferential surface to be lined. A gap between the rehabilitating sheet and the inner circumferential surface of the side walls of the manhole is filled with a filler, which is then hardened to line the side walls of the manhole. Pairs of plate frames having different diameters are coupled to each other to provide ring plates having different diameters.

Abstract: A rehabilitating pipe for repairing an existing pipe has pipe units that are mutually coupled in a longitudinal direction of the existing pipe. Each of the pipe units has segments that are mutually coupled in a circumferential direction of the existing pipe. Each of the segments has an inner-surface plate and an outer-wall plate extending vertically from and around an entire perimeter of the inner-surface plate. The outer-wall plate has lateral plates extending along a longitudinal direction of the inner-surface plate and end plates connected between the respective lateral plates. Connecting members couple the segments together in the circumferential direction to assemble the pipe unit. A restraining member is attached to and encircles an outer circumference of the assembled pipe unit to restrain the pipe unit.

Abstract: In a pipeline lining method, a tubular lining material impregnated with a thermosetting resin is inserted in an everted state into a pipeline and expanded and pressed against an inner peripheral surface of the pipeline. A vapor mist and water at normal temperature are sprayed toward the tubular lining material and mixed together to cool the vapor mist. The cooled vapor mist is directed onto the tubular lining material to cure the thermosetting resin impregnated in the tubular lining material to line the pipeline with the tubular lining material.

Abstract: A pipe lining material is inserted into a pipeline and expanded to press against an inner peripheral surface of the pipeline. Hot water from a first fluid source is sprayed onto the pipe lining material via a hose to cure the thermosetting resin impregnated therein and thereby cure the pipe lining material, with the sprayed hot water being accumulated in a bottom part of the pipe lining material. The hot water accumulated in the bottom part of the pipe lining material is delivered to a second fluid source separate and independent from the first fluid source, cooled in the second fluid source to provide cooling water, and supplied to the hose. The cooling water is sprayed onto the cured pipe lining material via the hose to cool the cured pipe lining material.

Abstract: A flexible tubular lining material impregnated with a thermosetting resin is folded and bound with binding members to provide a reduced width. Two elastic and rigid strip members are inserted into loop members attached to the lining material and are removably attached so as to sandwich the lining material. During pipeline lining work, the lining material to which the strip members have been attached is first inserted into a lateral pipe from a main pipe. The strip members are then removed from the lining material so that the lining material may remain inside the pipeline. The strip members are extracted from the pipeline, and the lining material is then made to expand via application of pressure from the inside. While kept in contact with the inner peripheral surface of the pipeline, the lining material is heated in order to cure the thermosetting resin thereof.

Abstract: An apparatus for everting a pipe-lining material for rehabilitating an existing pipe. The apparatus has a storage container for storing a pipe-lining material in an un-everted state, an eversion nozzle for everting the pipe-lining material, and a mounting pipe for removable connection between the storage container and the eversion nozzle. The everting nozzle has a nozzle opening to which the un-everted pipe-lining material is attached and which confronts an opening of the pipeline to be rehabilitated during use of the apparatus. The mounting pipe has an exterior surface, an interior space, a side portion provided with at least one opening communicating the exterior surface with the interior space, and an upper portion with an open end through which the un-everted pipe-lining material is inserted for attachment to the nozzle opening of the eversion nozzle.

Abstract: A boring device is inserted into a lateral pipe to bore a pipe lining material inserted into a main pipe across the lateral pipe intersecting therewith and a portion of which blocks an opening of the lateral pipe that communicates with the main pipe. The boring device has a rotatable shaft, a bearing member for rotatably bearing the rotatable shaft, and a boring blade mounted on the rotatable shaft for rotation therewith to bore through the portion of the pipe lining material that is blocking the opening of the lateral pipe. A supporting member is mounted on one side of the bearing member. An inflatable bag is mounted on the other side of the external periphery of the bearing member. The inflatable bag is inflatable in the lateral pipe so that the inflatable bag and the supporting member are pressed against an internal peripheral surface of the lateral pipe.

Abstract: A segment is coupled to another segment in circumferential and longitudinal directions thereof to assemble a rehabilitating pipe for rehabilitating the existing pipe. Each of the coupled segments has at least one coupling surface provided with a recessed part that confronts the recessed part at the coupling surface of the segment to which it is coupled to form therebetween a gap that is configured to receive and hold waste material existing at a bottom surface of the existing pipe when the rehabilitating pipe is assembled inside of the existing pipe.

Abstract: A lateral pipe lining material is comprised of a tubular resin absorbing material impregnated with a setting resin and has a flange formed on one end thereof. A peeling tube is mounted to an outer periphery of an area around the flange. A tubular peeling end, one end of which closed off, is mounted to an outer peripheral part of the other end of the tubular resin absorbing material. The other end of the peeling tube is mounted to a pressure bag, compressed air is fed into the pressure bag in a state in which the flange of the lateral pipe lining material is attached to a peripheral edge of an opening of a lateral pipe of a main pipe, and the lateral pipe lining material is everted and inserted into the lateral pipe from the main pipe side toward ground level via air pressure. The lateral pipe lining material is then heated while being pressed against an inner peripheral surface of the lateral pipe.

Abstract: A lateral pipe lining material comprises a tubular resin-absorbing material impregnated with a curable resin and a brim attached at one end thereof. The lining material is positioned so that the brim faces a peripheral edge of a lateral pipe opening of the main pipe. A ring-shaped gasket composed of an elastic material is attached to an upper surface of the brim, and a bonding resin is applied thereto. The gasket seals a gap between an inner peripheral surface of the main pipe and the brim. The lateral pipe lining material is evertedly inserted into the lateral pipe in a state in which the bonding resin applied to the brim is brought into contact with the inner peripheral surface of the main pipe. In such a configuration, ground water can be prevented from seeping into the bonding resin applied to the brim even if the ground water flows into the main pipe from a break of the lateral pipe.

Abstract: A spacer is constituted by overlapping on a first wedge-shaped member, whose upper surface is inclined at a prescribed angle, a second wedge-shaped member, whose lower surface is inclined at the same angle. This spacer is inserted in the gap between a inner wall surface of an existing pipe and the outer periphery of a rehabilitating pipe. Latching teeth are formed in the inclined surfaces of the first and second wedge-shaped members so that, when pressing the second wedge-shaped member to move it toward the first wedge-shaped member in the insertion direction, it cannot move in the direction the reverse of the insertion direction. Upon moving the second wedge-shaped member to the respective latch positions, the overall height of the spacer is successively increased in steps at a fine pitch, thus enabling the adjustment of the position of the rehabilitating pipe with respect to the existing pipe to be performed simply.

Abstract: An apparatus is provided for everting a tubular pipe lining material for rehabilitating an existing pipe. The apparatus has a sealed storage container storing a rotary body around which the pipe lining material is wound in a roll. An electric motor undergoes rotation in a first rotational direction to rotate the rotary body to wind the pipe lining material on the rotary body and undergoes rotation in a second rotational direction opposite to the first rotational direction. An eversion nozzle is attached to the storage container for everting the pipe lining material. When fluid pressure is supplied into the storage container to pull the pipe lining material out from the storage container and evert it via the eversion nozzle, the electric motor is caused to rotate in the second rotational direction due to the pulling out of the pipe lining material and to function as an electric generator to brake the pullout of the pipe lining material.

Abstract: There is provided a pipe lining method wherein a lateral pipe lining material and a main pipe lining material are securely joined. After a lateral pipe has been lined, a start liner is applied to the main pipe and a main pipe lining material is then inserted. A heating wire for melting the start liner is mounted on a surface of a flange of the lateral pipe lining material during or after lining of the lateral pipe. While the main pipe is being lined, the heating wire is heated to melt the start liner existing between the flange of the lateral pipe lining material and the main pipe lining material. When the resin in the main pipe lining material is cured, the main pipe lining material and flange of the lateral pipe lining material are integrated. This allows the lateral pipe lining material and main pipe lining material to be reliably joined.

Abstract: Integrally formed plastic segments comprising an inner surface plate constituting an inner peripheral surface and lateral plates vertically arranged on an edge part of the inner surface plate extending in a circumferential direction are coupled in a circumferential direction to assemble pipe units 10, 10?. The pipe units are coupled sequentially in the longitudinal direction of a pipe, and a rehabilitating pipe is laid down in an existing pipeline. When an existing pipe 21 is bent, the pipe units are coupled at a bending part 21b in the longitudinal direction of the pipe via coupling members so that central axes X1, X2 of the pipes are angled toward each other to create a bend. A gap formed between the pipe units at the bent part is covered by a cladding. Such a configuration enables a rehabilitating pipe to be watertight and resistant to external forces.

Abstract: A rehabilitating pipe is assembled inside an existing pipe using segments to repair the existing pipe. A coupling member is inserted through a segment when it is coupled in the longitudinal direction to another segment coupled already, and the coupling member is joined to the coupling member of another segment already coupled. During joining the segment is clamped against another segment and both the segments are coupled in the longitudinal direction. Such steps are repeated to couple other segments to segments already coupled until the rehabilitating pipe is laid to a predetermined length.