WO1989003459A1 - Process for repairing pipes - Google Patents
Process for repairing pipes Download PDFInfo
- Publication number
- WO1989003459A1 WO1989003459A1 PCT/AT1988/000078 AT8800078W WO8903459A1 WO 1989003459 A1 WO1989003459 A1 WO 1989003459A1 AT 8800078 W AT8800078 W AT 8800078W WO 8903459 A1 WO8903459 A1 WO 8903459A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formwork
- cement
- suspension
- mortar
- resulting
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000000725 suspension Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims abstract 2
- 238000009415 formwork Methods 0.000 claims description 39
- 239000004568 cement Substances 0.000 claims description 14
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 239000011398 Portland cement Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011400 blast furnace cement Substances 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000004597 plastic additive Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims 2
- 230000000996 additive effect Effects 0.000 claims 1
- 229910000278 bentonite Inorganic materials 0.000 claims 1
- 239000000440 bentonite Substances 0.000 claims 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims 1
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 3
- 230000009193 crawling Effects 0.000 abstract 1
- 239000012634 fragment Substances 0.000 abstract 1
- 239000011796 hollow space material Substances 0.000 abstract 1
- 230000001771 impaired effect Effects 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 230000008439 repair process Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000009418 renovation Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1657—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section lengths of rigid pipe being inserted
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
- E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining
Definitions
- the present invention relates to a method for the repair of sewable and walkable channels, the load-bearing capacity of which does not correspond to the usual structural requirements.
- This aim is achieved according to the invention in a method of the type mentioned above in that a sealed inner formwork is inserted into the damaged channel, then preferably rotatable inserts with nozzles are attached in specially prepared recesses in the formwork wall and are connected to a mixing and pump system or by means of pressure hose. Drain lines are connected to discharge the items to be washed, then the defective old stock including the organic contaminants is removed and / or removed from water or suspension with the aid of cutting jets and the resulting or already existing cavity is filled with suspension and solidified.
- a dense supporting formwork is also used.
- Specially mounted, preferably movable, nozzles are used in these, which direct cutting jets of water or suspension onto the adjacent channel wall, which is loosened or dissolved thereby.
- the nozzles are distributed on the outer surface; the items to be washed are advantageously drawn off via separate openings in the formwork wall.
- the cutting jet which strikes the existing channel wall with pressures of preferably between 400 and 1200 bar, dissolves it depending on its nature and at the same time rinses out dirt such as filter skin and fine particles.
- the destruction of the structure enables penetration and mixing with the subsequently pressed-in suspension.
- the mixing is so extensive and intimate that one can speak of the formation of a mortar.
- thermoplastic, elastomeric or duromeric organic binders are advantageously used, or hydraulic binders such as Portland cement, Eisenportland and blast furnace cement, cement with increased sulfate resistance, lime, quick-setting cement based on 11 CaO.TAl 2 O 3 .CaF 2 and alumina cement or Bentcnit.
- appropriate additives can be used to adapt the setting time of the cement to the given conditions.
- the addition of a flow agent, a liquefier, an air pore agent and / or a stabilizer can lead to further necessary improvements and modifications.
- An improvement in the penetrability and / or resistance of the mortar and / or the suspension is achieved by adding plastic additives, preferably based on acrylate and / or styrene butadiene.
- the steel formwork used initially serves as support formwork for the existing, collapse-threatening sewer, especially during the rinsing phase. If suspension is finally injected, the special formwork is effective as internal formwork, i.e. around them the new canal body is built up out of the ground, remnants of the old stock and suspension. Since the formwork adapts to the existing channel profile, cross-sectional reductions are not important.
- the formwork in the present method is expediently made of steel or equivalent material in assemblable elements, the size of which generally depends on the cross section of the sewer to be renovated.
- the formwork elements have at least one, preferably circular opening with a diameter of about 100 mm;
- the opening is either closed flush with the formwork jacket by means of a welded-on, inwardly extending pipe socket or, depending on the conditions encountered (floor, condition of the channel walls), the nozzle insert is installed in the formwork opening described, which is connected to the pressure pump via a pressure hose .
- suction devices are distributed evenly over the outer surface of the formwork in place of the nozzles in order to be able to remove the flushing material.
- phase 1 of the method according to the invention is ended. Subsequent pressing in of suspension creates the new channel around the formwork jacket, partly by mixing the suspension with the soil, but partly by non-positive connection of the old stock (phase 2).
- the workflow according to the present method can be designed as follows, for example:
- Rinsing phase The nozzle inserts installed in the formwork wall are designed in such a way that the nozzles can rotate as a result of water pressure.
- the cutting jet of water is directed at the damaged channel wall at pressures of 400 - 1200 bar, loosens loose material, removes the membrane skin and destroys the existing structure.
- the locally generated overpressure is created through those openings in the formwork degraded to which the derivation connects. If necessary, it may prove necessary to exchange nozzles and discharge inserts in order to achieve a uniform flushing out.
- Phase 2 comprises pressing in the suspension, preferably a cement suspension, which is mixed with soil material and remaining old stock by the pressure and the rotary movements of the nozzles.
- the method according to the invention thus makes the modern technology of high-pressure floor mortar usable for the underground repair of canals at risk of collapse. It is assumed that the intended repair of manholes or chambers will proceed without having to use the road surface.
- the work area is secured during the day by means of appropriately dimensioned formwork; At the same time, this formwork serves to shape the inner surface of the sewer to be renovated.
- the removal of duct wall parts and enveloping soil with water in the form of a high-tension cutting jet can be carried out from a radially mounted drill pipe through prepared openings in the formwork into the old stock or floor.
- the length of the drill pipe is expediently adapted to the clear width of the channel
- the drill pipe itself consists of the drill pipe, at the end of which a nozzle is located, and a drain pipe arranged centrally thereon.
- the pump and metering system installed outside the renovation line presses water into the drill pipe via pressure hoses, a cutting jet is generated through the nozzle, which exits with pressures between 400 and 1200 bar.
- the feed and the rotary movement of the boom ensure that the cutting beam dissolves the defective canal wall or the existing soil structure within a radius of approximately 60 to 100 cm.
- the loose and fine parts are pumped out through the exhaust pipe.
- the boom can be extended up to about 80 to 100 cm; in the retreat phase, cement suspension is pressed through the nozzle into the soil and mixed with the remaining soil parts, whereby the mortar occurs.
- the segment-like mortar finally creates an annular consolidation body around the sewer, which is progressively followed in the direction of the sewer axis until the entire renovation route has been covered.
- the inner formwork of the canal is moved on as work progresses.
- the extent of the consolidation body must be based on the strength achieved to ensure the load-bearing capacity of the renovated sewer. Due to the relatively low specific concrete quality, the inner surface is expediently either lined with prefabricated parts or after the cement slurry has been removed, e.g. by means of high pressure flushing, with a special shotcrete layer in order to achieve the required abrasion resistance and chemical resistance.
- the method described will be used in particular if the local conditions require extensive mortaring and / or the old stock is in a different state.
- the method according to the invention thus opens up the possibility of restoring burglar-endangered road channels without damaging the road surface, without reducing the drainage cross-section, without disturbing residents and without endangering existing installations or neighboring buildings, that is to say overall without impairing the environment in any way.
- the construction site equipment - cement silo, pump system, construction hut, material warehouse - takes up relatively little space and can be accommodated in vacant lots if necessary.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA2546/87 | 1987-10-06 | ||
AT254687A AT391917B (en) | 1987-10-06 | 1987-10-06 | Method of repairing drains or sewers |
AT197188A AT397834B (en) | 1988-08-04 | 1988-08-04 | Method of repairing drains or sewers |
ATA1971/88 | 1988-08-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989003459A1 true WO1989003459A1 (en) | 1989-04-20 |
Family
ID=25597309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1988/000078 WO1989003459A1 (en) | 1987-10-06 | 1988-10-05 | Process for repairing pipes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0334917A1 (en) |
JP (1) | JPH02501492A (en) |
WO (1) | WO1989003459A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0110664A2 (en) * | 1982-11-24 | 1984-06-13 | Pirelli Construction Company Limited | Improved method of renovating sewers |
GB2147393A (en) * | 1983-09-28 | 1985-05-09 | Ian Roland Yarnell | Valve for grouting |
GB2167796A (en) * | 1984-12-01 | 1986-06-04 | Tunneline Limited | Temporary formwork for tunnel or sewer lining |
WO1987005365A1 (en) * | 1986-03-03 | 1987-09-11 | Allgemeine Baugesellschaft - A. Porr Aktiengesells | Process for restoring channels threatening to collapse, in particular profiled channels |
-
1988
- 1988-10-05 EP EP19880908105 patent/EP0334917A1/en not_active Ceased
- 1988-10-05 WO PCT/AT1988/000078 patent/WO1989003459A1/en not_active Application Discontinuation
- 1988-10-05 JP JP50781988A patent/JPH02501492A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0110664A2 (en) * | 1982-11-24 | 1984-06-13 | Pirelli Construction Company Limited | Improved method of renovating sewers |
GB2147393A (en) * | 1983-09-28 | 1985-05-09 | Ian Roland Yarnell | Valve for grouting |
GB2167796A (en) * | 1984-12-01 | 1986-06-04 | Tunneline Limited | Temporary formwork for tunnel or sewer lining |
WO1987005365A1 (en) * | 1986-03-03 | 1987-09-11 | Allgemeine Baugesellschaft - A. Porr Aktiengesells | Process for restoring channels threatening to collapse, in particular profiled channels |
Also Published As
Publication number | Publication date |
---|---|
EP0334917A1 (en) | 1989-10-04 |
JPH02501492A (en) | 1990-05-24 |
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