RU2275543C1 - Method of repair of large-diameter pipelines - Google Patents

Method of repair of large-diameter pipelines Download PDF

Info

Publication number
RU2275543C1
RU2275543C1 RU2004129963/06A RU2004129963A RU2275543C1 RU 2275543 C1 RU2275543 C1 RU 2275543C1 RU 2004129963/06 A RU2004129963/06 A RU 2004129963/06A RU 2004129963 A RU2004129963 A RU 2004129963A RU 2275543 C1 RU2275543 C1 RU 2275543C1
Authority
RU
Russia
Prior art keywords
pipe
polymer
repaired
repair
filled
Prior art date
Application number
RU2004129963/06A
Other languages
Russian (ru)
Other versions
RU2004129963A (en
Inventor
Федор Иванович Лобанов (RU)
Федор Иванович Лобанов
Александр Матвеевич Кузнецов (RU)
Александр Матвеевич Кузнецов
Ханс-Георг ХАРТАН (DE)
Ханс-Георг Хартан
Рауль Шалвович Непаридзе (RU)
Рауль Шалвович Непаридзе
Original Assignee
Федор Иванович Лобанов
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Федор Иванович Лобанов filed Critical Федор Иванович Лобанов
Priority to RU2004129963/06A priority Critical patent/RU2275543C1/en
Publication of RU2004129963A publication Critical patent/RU2004129963A/en
Application granted granted Critical
Publication of RU2275543C1 publication Critical patent/RU2275543C1/en

Links

Abstract

FIELD: pipeline transport.
SUBSTANCE: invention is used at repair of main lines and sewage water collectors. According to proposed method, auxiliary polymeric pipe is driven into pipe to be repair in which strip is cut over entire length of polymeric pipe preliminarily, cut being arranged in lower part of pipe under repair. Polymeric pipe is pressed to inner surface of pipe under repair and is fixed in place by expanding rods. Fitting is installed in lower part of pipe under repair passing through cut of polymeric pipe, and then fitting is filled with concrete. After hardening of concrete, expanding rods are removed, interpipe space is filled with water solution of anionic polymer with hardener under pressure.
EFFECT: improved quality of repair pipe.
9 cl

Description

The invention relates to the field of transportation of liquid and gaseous media using pipelines, namely steel and reinforced concrete pipelines, and can be used for overhaul of pipelines with a diameter of 1 m or more, preferably main, as well as sewage collectors.
A known method of repairing pipelines (GB, patent 2157797, 1985), according to which a corrugated polymer pipe is inserted into the pipeline under repair, the corrugations of which touch the inner surface of the pipe being repaired, and then a smooth-walled polymer pipe is pressed into the corrugated pipe, which presses the corrugations to the inner surface of the pipe to be repaired.
The disadvantage of this method should recognize the sequential introduction of two pipes, which complicates the repair process and increases its cost, in addition, the introduction of the second pipe reduces the cross-section of the pipe, which affects the performance of the pipeline.
A known method of repairing pipelines (application WO 97/49946, 1997), according to which a polymer pipe is introduced into the pipe being repaired, the head part of which is made in the form of a truncated cone and contains radial blades on the outer surface, the middle part is corrugated, and the tail part is smooth. The presence of the front cone-shaped part of the pipe and the middle corrugated middle part facilitates the entry of the pipe into the pipeline being repaired, and the presence of radial vanes ensures that the transported medium does not fall into the annular zone (and, therefore, to the leakage site).
The disadvantage of this method should be recognized as a weak isolation of the fluid from the pipeline defect.
A known method of repairing pipelines (SU, copyright certificate 96426, 1952), according to which, when repairing water and sewer pipes, a smaller diameter metal pipe is introduced into the damaged metal pipe, followed by a welded pipe joint.
The disadvantage of this method should be recognized as a narrow scope (only steel pipes of small diameter), as well as reducing the cross section of the pipe, which affects the performance of the pipeline.
There is also known a method of repairing a pipeline (SU, copyright certificate 1221300, 1986), according to which a smaller diameter polyethylene pipe is introduced into the damaged pipe using a jack or hydraulic cylinder.
The disadvantage of this method should be recognized as the absence of sealing defects in the repaired pipe, which will inevitably lead to the following leaks.
The closest analogue of the claimed method should be recognized as a pipeline repair method (RU, patent 2116552, 1998), according to which a smaller diameter polyethylene pipe is inserted into the damaged pipe using a pushing device and the annulus is filled with cement gel, the diameter ratio of the polyethylene and the pipe being repaired is 0, 8: 1.0.
A disadvantage of the known method is the use of cement gel, which deforms the polyethylene pipe with its severity (up to rupture), incomplete filling of the annular space due to the low fluidity of the cement gel, and the restriction on the size of the repaired pipe, since the polyethylene pipe is pushed into the pipe of considerable diameter without breaks a pipe of a similar diameter is difficult.
The technical problem solved by the developed method is to ensure high-quality repair of large diameter pipelines.
The technical result obtained by the implementation of the method consists in expanding its field of application while improving the reliability of repairs.
To achieve the specified technical result, it is proposed to use a method for repairing large-diameter pipelines, including introducing an auxiliary polymer pipe into the pipe being repaired, filling the annular space with a hardening solution and holding it until it completely hardens; moreover, a strip is cut along the entire length of the polymer pipe, then it is introduced into the pipe to be repaired pipe so that the cut was located in the lower part of the repaired pipe, press the polymer pipe to the inner surface the bridges of the pipe being repaired and fixed using expansion rods, install reinforcement passing through the polymer pipe in the bottom of the pipe being repaired, and pour it with concrete of grade no lower than M-300, after the concrete has hardened, the expansion rods are removed and the annulus is filled with pressure with an anionic polymer aqueous solution with hardener. When implementing the method, a fiberglass pipe is usually used, however, it is possible to use polyethylene, polyvinyl chloride and other polymer pipes. The choice of pipe material depends on the purpose of the pipeline being repaired. Usually, for the convenience of work, previously, before being placed in the repaired pipe, devices (nipples) are installed in the polymer pipe for pumping a hardening solution into the annulus. For a more uniform distribution of the hardening mortar in the annulus, as well as to optimize the operating conditions of the repaired pipeline, the polymer pipe is centered in relation to the pipe being repaired before pressing. If before that at least one more polymer pipe was installed in the pipeline being repaired, then centering is also carried out relative to the previously installed pipe. The centering is predominantly carried out using polymer crackers placed around the circumference in the annular space with a gap of 0.4-0.6 m. For better fixation of the polymer pipe before introducing the hardening solution into the annular space, the gap between the polymer pipe and the pipe being repaired is filled in the area of the end of the polymer pipe to a depth of 100 mm with an aqueous solution of an anionic polymer with a hardener and asbestos fibers as a filler. Asbestos fibers reinforce (and harden) the resulting monolith of the anionic polymer. When repairing trunk pipelines and, especially, sewage collectors, more than one polymer pipe is mainly introduced. In this case, to increase the tightness of the joints of their ends, the grooves formed by the ends of the polymer pipes are filled with a polyurethane sealant. To better fix the hardening anionic polymer on the inner surface of the pipe being repaired, its inner surface is first cleaned of contaminants.
In the future, the essence of the proposed method will be disclosed using the preferred implementation example - repair of the linear part of the sewage collector with a diameter of 3 m. Previously, a flow-exhaust ventilation system was installed in the repaired collector. Then, the inner surface of the collector was treated with a formalin disinfectant solution (3%) using pneumatic sprayers. The sediment located at the bottom of the collector was removed mechanically. To remove grease and grease-like contaminants from the inner surface of the collector, it was treated with a 10% sulfamic acid solution heated to 60 ° C, under a pressure of up to 3 kg / cm 2 . At the working site, fiberglass pipes with a diameter of 3 m were cut using a power tool to remove a strip whose width was 10-12% of the circumference of the fiberglass pipe. On the remaining surface of the fiberglass pipes, the required number (4 holes in width with a step of 1 linear meter) of mounting devices was installed, and also holes were made for supplying a hardening solution of anionic polymer and placed in the indicated nipple holes. The prepared pipe was lowered into the well and, using a transport and assembly machine, the workpiece was delivered to the installation site in the collector. Using hydraulic cylinders, the fiberglass pipe was centered relative to the collector. When centering the fiberglass pipe, plastic crackers were used, installed at the pipe end with a pitch of 0.4-0.6 m. The size of the crackers was adjusted at the installation site. Using the expanding mechanism of the transport and assembly machine, the fiberglass pipe was pressed against the inner surface of the collector so that the pipe cutout was located at the bottom of the collector. As the fiberglass pipe is pressed against the inner surface of the collector, spreader rods are installed and previously fixed in the mounting fixtures that hold the fiberglass pipe until it is fully secured. In the end part after installing the crackers, the gap between the fiberglass pipe and the inner surface of the collector to a depth of 80-90 mm was filled with an asbestos-polymer composition based on an anionic acrylic polymer with a hardener - chromium acetate. The groove between the ends of the installed and previously installed fiberglass pipes was filled with Elasto-Dec VT polyurethane sealant. Holes are made along the edges of the cut in the body of the collector, into which A-III-12 L-shaped reinforcing bars are installed with a pitch of 0.25-0.35 m and reinforcing bars are attached directly to the indicated rods with the formation of a three-dimensional reinforcement structure in the lower part of the collector. The formed volume reinforcing structure is filled with concrete of grade no lower than M-300 with a 20/40 crushed stone fraction on sulphate-resistant Portland cement. After gaining 50% of the concrete strength, the expansion rods are dismantled, the nipples are cleaned and the cement-polymer composition based on the anionic polyamide solution with hardener chromium acetate is pumped through them into the annulus. At the end of the injection process, the nipples are sealed with a polyurethane compound - Elasto-Dec VT.
Fiberglass pipes installed in a similar manner in the collector increase its service life by at least 16 years.

Claims (9)

1. A method of repairing large-diameter pipelines, including introducing an auxiliary polymer pipe into the pipe being repaired, filling the annular space with a hardening solution and keeping it to solidify completely, characterized in that a strip is cut along the entire length of the polymer pipe, then it is inserted into the pipe being repaired in such a way so that the incision was located at the bottom of the repaired pipe, press the polymer pipe to the inner surface of the repaired pipe and fix using rods, install reinforcement passing through the polymer pipe in the lower part of the pipe being repaired, and pour it with concrete of grade no lower than M-300, after the concrete has hardened, the expansion rods are removed and the annulus is filled with pressure with an aqueous solution of anionic polymer with a hardener.
2. The method according to claim 1, characterized in that they use a fiberglass pipe.
3. The method according to claim 1, characterized in that preliminarily, in the polymer pipe, devices are installed for pumping into the annular space of the hardening solution.
4. The method according to claim 1, characterized in that before pressing the polymer pipe is centered with respect to the pipe being repaired.
5. The method according to claim 4, characterized in that the centering is carried out using polymer crackers placed around the circumference in the annulus with a gap of 0.4-0.6 m
6. The method according to claim 1, characterized in that the gap between the polymer pipe and the pipe being repaired is filled to the depth of 100 mm with an anionic polymer solution with a hardener and asbestos fibers as a filler to a depth of 100 mm.
7. The method according to claim 1, characterized in that more than one polymer pipe is introduced.
8. The method according to claim 7, characterized in that the grooves formed by the ends of the polymer pipes are filled with a polyurethane sealant.
9. The method according to claim 1, characterized in that the preliminary inner surface of the repaired pipe is cleaned of contaminants.
RU2004129963/06A 2004-10-18 2004-10-18 Method of repair of large-diameter pipelines RU2275543C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2004129963/06A RU2275543C1 (en) 2004-10-18 2004-10-18 Method of repair of large-diameter pipelines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2004129963/06A RU2275543C1 (en) 2004-10-18 2004-10-18 Method of repair of large-diameter pipelines

Publications (2)

Publication Number Publication Date
RU2004129963A RU2004129963A (en) 2006-03-27
RU2275543C1 true RU2275543C1 (en) 2006-04-27

Family

ID=36388589

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2004129963/06A RU2275543C1 (en) 2004-10-18 2004-10-18 Method of repair of large-diameter pipelines

Country Status (1)

Country Link
RU (1) RU2275543C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2560764C2 (en) * 2013-12-30 2015-08-20 Валерий Григорьевич Лапшин Method to restore deformed storm water sewer, collectors of small rivers in urban area

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2560764C2 (en) * 2013-12-30 2015-08-20 Валерий Григорьевич Лапшин Method to restore deformed storm water sewer, collectors of small rivers in urban area

Also Published As

Publication number Publication date
RU2004129963A (en) 2006-03-27

Similar Documents

Publication Publication Date Title
KR100553240B1 (en) Continuous inversion device of tube using air pressure for hose lining
CN110617381A (en) Drainage pipeline cracking local plugging structure, plugging method and repairing method
KR100920794B1 (en) Mending apparatus and mending method for non-digging sewerage
CN1755184A (en) Excavation-free integral restoration method of underground conduit and inspection well
CN1616546A (en) Strengthening carbon fiber composite material and method for repairing defective pipeline
CN105179875A (en) Non-excavation repairing method for deformation collapse of weak stratum drainage pipe
CN101338847A (en) HDPE tube welding-free interpenetration inner liner pipe-repairing method
KR20130059083A (en) Entire repairing method for pipe lines with non-excavation
AU2011347635A1 (en) Pipe repair method and repaired pipe
RU2191317C2 (en) Method of pipeline repairs
RU2275543C1 (en) Method of repair of large-diameter pipelines
CN102252147B (en) Method for repairing crack of pipeline
KR200365487Y1 (en) Continuous inversion device of tube using air pressure for hose lining
CN110645418B (en) Connecting method for mounting large-diameter pipeline
RU2374551C2 (en) Method for repair of pipeline defects
KR20080063723A (en) Mending method for water pipe
KR101682014B1 (en) build method of steel pipe in a tunnel for waterways
KR20090041835A (en) Trenchless technology with selective flange use lay underground water pipe supply and drainage
KR20040031560A (en) Composite frame for repair and reinforcement for inner wall of tunnel
CN108131506A (en) The construction method that a kind of steel pipe is connect with FRP sand tube
KR100934194B1 (en) Epoxy liner tube repairing apparatus and method using vacuum pressure
KR100633737B1 (en) A repairing method for used fresh water pipe with thermosetting resin immersion PE soft textile reinforce tube using air and water pressure-driven turn inside out insertion device of pipe fixed type.
RU2375632C1 (en) Procedure of pipeline repair
Marsh Composites renovate deteriorating sewers
CN213361510U (en) Inner piston ring structure for pipeline repair

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20061019