CN114526398A - Construction method for repairing drainage pipeline by newly added lining pipe - Google Patents
Construction method for repairing drainage pipeline by newly added lining pipe Download PDFInfo
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- CN114526398A CN114526398A CN202110776344.1A CN202110776344A CN114526398A CN 114526398 A CN114526398 A CN 114526398A CN 202110776344 A CN202110776344 A CN 202110776344A CN 114526398 A CN114526398 A CN 114526398A
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- lining
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- 238000010276 construction Methods 0.000 title claims abstract description 29
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- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 14
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- 238000007789 sealing Methods 0.000 claims abstract description 10
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- 239000010865 sewage Substances 0.000 claims description 5
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- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
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- 229920005749 polyurethane resin Polymers 0.000 claims 1
- 239000012945 sealing adhesive Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
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- 230000007797 corrosion Effects 0.000 description 2
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- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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- 239000011449 brick Substances 0.000 description 1
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Images
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
- 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
- F16L55/163—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface of the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a construction method for repairing a drainage pipeline by a newly-added lining pipe, which comprises the following steps: (1) determining a required operation section by using a detection tool; (2) performing preliminary pipeline detection operation, and formulating a specific construction scheme; (3) carrying out pipeline cleaning operation and carrying out detection operation again; (4) performing pipeline repairing operation, namely firstly, conveying an auxiliary lining material into an old pipeline in an overturning manner to play a role in protecting a resin lining pipe, secondly, conveying the lining pipe into the pipe in an overturning manner, under the condition that the lining pipe is expanded by air pressure or water pressure again, adopting steam circulation heating to solidify the wall of the lining pipe, finally cutting off redundant materials, sealing, and forming a new continuous high-strength lining new pipe in the old pipe; (5) carrying out secondary pipeline detection operation; (6) and (5) performing recovery operation of the original inspection well and the road surface. The method does not need to excavate the road surface, has short construction period, is environment-friendly and economic, and has higher social benefit and economic benefit.
Description
Technical Field
The invention relates to the technical field of trenchless pipelines, in particular to a construction method for repairing a drainage pipeline by adding a lining pipe.
Background
Along with the construction of urban transportation facilities, such as roads, bridges, underground rail transit, and the like, drainage facilities for protecting the water quality of public water areas and urban public environments have been developed greatly in recent years. In the construction and maintenance management work of urban infrastructure, the phenomena of underground pipeline body breakage, pipeline connector disconnection, underground water leakage and the like are more discovered, so that roads sink and even collapse, and traffic and normal municipal drainage are affected. According to the engineering requirement, a novel scientific pipeline repairing technology is urgently sought.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method for repairing the drainage pipeline by a newly-added lining pipe, which does not need to excavate a road surface, has short construction period, is environment-friendly and economic and has higher social benefit and economic benefit.
In order to solve the technical problem, the invention provides a construction method for repairing a drainage pipeline by newly adding a lining pipe, which comprises the following steps: (1) determining a required operation section by using a detection tool, and stopping sewage discharge of the pipeline to be repaired; (2) carrying out preliminary detection operation on the pipeline to be repaired, and formulating a specific construction scheme; (3) cleaning the pipeline to be repaired, and detecting the pipeline again after cleaning is finished until the pipeline to be repaired meets the operation standard; (4) performing pipeline repairing operation, firstly turning over and transferring auxiliary lining materials into the pipeline to be repaired to play a role in protecting a lining pipe, secondly sending the lining pipe into the pipeline to be repaired by a turning method, and under the condition that the lining pipe expands by air pressure or water pressure, adopting steam for cyclic heating to solidify the pipe wall of the lining pipe, and finally cutting off redundant materials at the pipe orifice of the pipeline to be repaired, sealing the opening, and forming a new continuous high-strength lining pipe in the pipeline to be repaired; (5) carrying out secondary detection operation on the pipeline to be repaired; (6) and (5) performing recovery operation of the original inspection well and the road surface.
Furthermore, the detection operations in the second step, the third step and the fifth step all adopt a TV pipeline television camera system to detect the pipeline to be repaired.
Further, the lining pipe is made of polyester fiber felt, the outer layer is made of polyurethane, and thermosetting resin is thoroughly soaked in the lining pipe.
And further, sealing operation of the fourth step adopts sealant and a stainless steel pressure ring to strengthen sealing, and meanwhile, a triangular reinforcing bar ring is arranged at the pipe orifice end of the pipeline to be repaired.
Further, before the curing operation of the fourth step, fixing reinforcing steel bars are uniformly distributed on the area of the lining pipe.
Further, before the curing operation of the fourth step, a copper pipe is inserted into the lining pipe which is arranged outside the pipeline to be repaired.
The invention has the beneficial effects that: the invention protects the environment, saves resources, adopts a road surface excavation-free method, thereby generating no garbage, blocking traffic, greatly improving the image of pipeline repairing construction, having no need of investing a large amount of manpower and machinery in construction, having slightly lower construction cost than the traditional excavation repairing method and having good overall social benefit and economic benefit.
Drawings
FIG. 1 is an overall flow chart of the present invention.
FIG. 2 is a flow chart of the pipeline rehabilitation process of the present invention.
FIG. 3 is a schematic view of a port in a pipeline to be rehabilitated according to the present invention.
Fig. 4 is a schematic view of the triangular reinforcing ring structure of the present invention.
The numbering in the figures illustrates: 1. a pipeline to be repaired, 2, a lining pipe, 3, sealant, 4 and a stainless steel pressure ring.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1 to 4, an embodiment of the method for repairing a drainage pipeline by adding a lining pipe according to the present invention includes the following steps: (1) determining a required operation section by using a detection tool, and stopping sewage discharge of the pipeline to be repaired; (2) carrying out preliminary detection operation on the pipeline to be repaired, and formulating a specific construction scheme; (3) cleaning the pipeline to be repaired, and detecting the pipeline again after cleaning is finished until the pipeline to be repaired meets the operation standard; (4) performing pipeline repairing operation, firstly turning over and transferring auxiliary lining materials into the pipeline to be repaired to play a role in protecting the lining pipe, secondly conveying the lining pipe into the pipeline to be repaired by a turning method, and under the condition that the lining pipe expands by air pressure or water pressure again, adopting steam for cyclic heating to solidify the pipe wall of the lining pipe, and finally cutting off redundant materials at the pipe orifice of the pipeline to be repaired, sealing the opening of the pipeline to be repaired, so that a new continuous high-strength lining pipe can be formed in the pipeline to be repaired; (5) carrying out secondary pipeline detection operation to be repaired; (6) and (5) performing recovery operation of the original inspection well and the road surface.
The flow of the operation is as follows:
firstly, detecting operation.
1.1, detecting the drainage condition of the pipeline and the pavement settlement condition through each inspection well, determining a pipeline repairing area, plugging the upstream of the pipeline to be repaired, arranging a bypass pipe or a temporary water pump drainage facility for temporary drainage, leading off upstream sewage and stopping the discharge of the sewage in the pipeline to be repaired for convenience of construction.
And 1.2, observing the conditions in the pipeline by adopting a TV pipeline television camera system, and formulating a specific construction scheme according to the conditions of damage, corrosion and the like in the pipeline.
1.3, after an operation section is determined, expanding an original inspection well to serve as a construction operation pit, arranging one operation pit at the front and the back of the construction section, wherein the construction operation pit is 2m multiplied by 1.5m, building a 240 mm thick brick wall around the construction operation pit to prevent the collapse of the surrounding soil, firstly adopting methods such as steel sheet piles to support if the surrounding soil is poor, then building a guard wall, arranging a temporary enclosure above the pavement of the operation pit, and arranging a warning mark, when the operation depth is more than 2m, arranging a ladder on the side wall of the operation pit, and arranging a safety belt when personnel go up and down;
and secondly, cleaning.
2.1 before construction, checking and evaluating the gas in the pipeline, if harmful gas and overproof phenomenon are found, treating by adopting physical and chemical methods such as ventilation, air dilution and the like, checking and evaluating the gas in the pipeline after treatment is finished, and constructing after safety is determined.
2.2 cleaning the pipeline by adopting a mechanical cleaning and high-pressure water washing mode, and pretreating the pipeline by using cement paste or a quick leaking stoppage material when parts with serious water leakage, damage, cracking and the like are found; then a pipe cleaner is used for thoroughly cleaning scaling substances and deposits attached to the inner wall of the seriously scaled pipeline at a low speed; the plunger device is adopted to remove the residual water and the debris on the inner wall of the pipe through the inner wall of the pipe.
2.3 after cleaning, detecting the cleaning condition in the pipeline by using a TV pipeline television camera system, and after cleaning, taking the pipeline to be qualified without dust, particles, oil stain and sharp protrusions exceeding 10 mm.
And thirdly, turning the lining of the lining pipe.
3.1 before construction, according to the designed pipeline repairing condition, a lining pipe production factory adopts CIPP lining materials to process and form the lining pipe according to the length and the pipe diameter specification of the construction pipeline according to the design requirement, and then the lining hose is filled with thermosetting unsaturated resin;
3.2, conveying the lining hose material which passes through the resin infusion to a construction site by using a box type insulation truck, and keeping the temperature in the truck box at 20-25 ℃ in the conveying process, wherein the resin on the surface of the lining hose must be ensured not to be solidified from the beginning of the resin infusion to the beginning of the construction.
3.3, turning the end of the inner lining pipe out from the inside to the outside, reserving a preset length of 150 mm-200 mm, and clamping the preset length on a reverse ring of the mounting sand well;
3.4 then adopting an air compressor to lead in the air pressure of 1.5Mpa to 1.7Mpa, expanding the overturned part of the lining pipe and continuously overturning and propelling the overturned part from the inside to the outside, continuously increasing the compressed air to keep the air pressure of 1.5Mpa to 1.7Mpa so that the lining pipe is completely overturned and clings to the wall of the old pipe, and the propelling speed of the lining pipe in the pipe is 2 m/min.
Fourthly, curing operation.
4.1 the other end of the pipeline to be repaired is connected with a hot water boiler through a heating pipe, hot water is sent to the tail end of the lining pipe through a hot water pressurizing pump by the heating pipe and then is pumped back to the hot water boiler from the reversing tower to form a hot water circulation loop, and the working pressure of hot water circulation reaches 0.08-0.1 Mpa.
4.2 when the temperature in the pipe reaches above 80 ℃, controlling the water temperature to be about 80 ℃, keeping the pressure in the pipe to be 0.08-0.1 Mpa, and setting the curing time of the lining pipe to be 6-10 h (the curing time depends on the length of the working section, the diameter of the mother pipe, the underground condition and other factors).
4.3 after the epoxy resin is cured, stopping inputting hot water, and using outdoor normal-temperature air input to reduce the temperature until the temperature in the pipe reaches the normal temperature.
Fifthly, cutting off the pipe orifice.
5.1 after the curing process of the pipeline lining pipe is finished, cutting off the redundant lining pipe at the pipe opening.
And 5.2 after the port is sealed, detecting the repaired pipeline by adopting a TV pipeline television camera system.
And the detection operation adopts a TV pipeline television camera system to detect the pipeline to be repaired.
The lining pipe is made of polyester fiber felts, the outer layer of the lining pipe is made of polyurethane, thermosetting resin is thoroughly soaked in the lining pipe, the lining pipe is durable and practical, the durability can reach 50 years at most, the lining pipe has the advantages of corrosion resistance and abrasion resistance, the strength of the material is high, the problem of underground water leakage of a pipeline is thoroughly solved, the lining pipe is once and for all, the lining pipe is utilized, the loss of the cross section area of an original pipeline is small (a lining protective layer with the thickness of 4 mm-20 mm is formed on the inner wall after the lining pipe is finished), the surface is smooth, the water flow friction is reduced (the friction coefficient is reduced from 0.013 to 0.010), and the flow capacity of the pipeline is improved.
Before the curing operation in the fourth step, a triangular reinforcing ring is arranged at the pipe orifice end of the pipeline to be repaired, for example, 1 triangular reinforcing ring is arranged at every 1.5m position of the area of the lining pipe, and then 2-8 phi 10 copper pipes are inserted into the excessive part of the lining pipe for releasing air (the arrangement quantity of the exhaust pipes depends on the pipe diameter, and 2 pipes are arranged when the pipe diameter is increased by 200 mm generally). The traditional method is that an air compressor is utilized to turn over an inner lining pipe from inside to outside, and then the inner lining pipe is hardened by utilizing high temperature, and the defects that the two are not completely attached and are often partially hollow are overcome, and the reason is that the area of the newly added inner lining pipe and the original pipeline is too large; after improvement, the pipeline is fixed by adopting a 6mm triangular steel bar ring, the supporting points of the two are increased, in a pipeline area with the length of 1.5m, the contact area between the newly-increased lining pipe and the original pipeline area is smaller, the two pipelines can be tightly combined, the fixing quality is effectively ensured, and the pipeline has greater economic benefit and social benefit.
Sealing is reinforced by adopting sealant and a stainless steel pressure ring in the sealing operation of the fourth step, so that a smooth and uniform transition surface is formed between the original pipe and the lining pipe, and the damage of the port of the lining pipe caused by long-term use is prevented. And a plastic gasket is arranged between the sealing glue and the stainless steel pressure ring. The loose pipe end is not strict and is a major factor of rework of the engineering project, and the reinforcing steel bar ring with the diameter of 12mm can be arranged at the pipe end through the past engineering practice, and the triangular reinforcing steel bar ring is welded and stiffened, so that the pipe end is tightly combined, the loose condition can not occur, and the engineering quality is effectively ensured.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. A construction method for repairing a drainage pipeline by a newly added lining pipe is characterized by comprising the following steps: (1) determining a required operation section by using a detection tool, and stopping sewage discharge of the pipeline to be repaired; (2) carrying out preliminary detection operation on the pipeline to be repaired, and formulating a specific construction scheme; (3) cleaning the pipeline to be repaired, and detecting the pipeline again after cleaning is finished until the pipeline to be repaired meets the operation standard; (4) performing pipeline repairing operation, firstly turning over and transferring auxiliary lining materials into the pipeline to be repaired to play a role in protecting the lining pipe, secondly conveying the lining pipe into the pipeline to be repaired by a turning method, and under the condition that the lining pipe expands by air pressure or water pressure again, adopting steam for cyclic heating to solidify the pipe wall of the lining pipe, and finally cutting off redundant materials at the pipe orifice of the pipeline to be repaired, sealing the opening of the pipeline to be repaired, so that a new continuous high-strength lining pipe can be formed in the pipeline to be repaired; (5) carrying out secondary pipeline detection operation to be repaired; (6) and (5) performing recovery operation of the original inspection well and the road surface.
2. The method as claimed in claim 1, wherein the second, third and fifth steps are performed by a TV video camera system for detecting the pipeline to be repaired.
3. The method as claimed in claim 1, wherein the lining pipe is made of polyester fiber felt, and the outer layer is made of polyurethane resin and is completely impregnated with thermosetting resin.
4. The method as claimed in claim 1, wherein the sealing operation in step four is performed by sealing adhesive and stainless steel ring, and a triangular reinforcing ring is disposed at the end of the pipe to be repaired.
5. The method as claimed in claim 1, wherein before the curing step four, the reinforcing rings are uniformly distributed around the area of the liner.
6. The method as claimed in claim 1, wherein before the curing operation, copper pipes are inserted into the lining pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110776344.1A CN114526398A (en) | 2021-07-09 | 2021-07-09 | Construction method for repairing drainage pipeline by newly added lining pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110776344.1A CN114526398A (en) | 2021-07-09 | 2021-07-09 | Construction method for repairing drainage pipeline by newly added lining pipe |
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| Publication Number | Publication Date |
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| CN114526398A true CN114526398A (en) | 2022-05-24 |
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| CN202110776344.1A Pending CN114526398A (en) | 2021-07-09 | 2021-07-09 | Construction method for repairing drainage pipeline by newly added lining pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116001326A (en) * | 2022-11-22 | 2023-04-25 | 中建八局第二建设有限公司 | Drainage pipeline arrangement device and method for central urban area |
| CN117432046A (en) * | 2023-12-19 | 2024-01-23 | 青岛亿联建设集团股份有限公司 | Old drainage pipeline reconstruction and repair construction method |
-
2021
- 2021-07-09 CN CN202110776344.1A patent/CN114526398A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116001326A (en) * | 2022-11-22 | 2023-04-25 | 中建八局第二建设有限公司 | Drainage pipeline arrangement device and method for central urban area |
| CN117432046A (en) * | 2023-12-19 | 2024-01-23 | 青岛亿联建设集团股份有限公司 | Old drainage pipeline reconstruction and repair construction method |
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