CN110847324A - Construction method for lining pipe of drainage pipeline - Google Patents
Construction method for lining pipe of drainage pipeline Download PDFInfo
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- CN110847324A CN110847324A CN201911221728.6A CN201911221728A CN110847324A CN 110847324 A CN110847324 A CN 110847324A CN 201911221728 A CN201911221728 A CN 201911221728A CN 110847324 A CN110847324 A CN 110847324A
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- 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
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- 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
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- Lining And Supports For Tunnels (AREA)
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Abstract
The invention provides a drainage pipeline lining pipe construction method, which comprises the following steps: step one, defining a construction area; step two, water is cut off from the pipeline; thirdly, reversely discharging accumulated water in the original pipe; step four, cleaning the pipeline; step five, performing lining turning operation; step six: arranging a reinforcing steel bar ring; seventhly, externally sleeving a pipe port with a ring; step eight, performing waterproof construction on the original drainage well; step nine, water closing test. The construction method for the lining pipe of the drainage pipeline has the advantages of short construction period, guaranteed construction quality, easiness in operation, effective prevention of leakage of the original concrete pipe, laying a good foundation for subsequent underground excavation work and no pollution to the environment.
Description
Technical Field
The invention belongs to the technical field of water supply and drainage, and particularly relates to a construction method of a lining pipe in a drainage pipeline.
Background
Along with the large-area construction of underground engineering projects such as subways, deep foundation pit projects and the like, various problems existing in the existing urban underground pipelines are increasingly exposed. At present, a large amount of industrial wastewater and domestic wastewater are reserved and discharged in urban drainage pipelines in China for a long time, and corrosive substances in the industrial wastewater and the domestic wastewater can cause concrete of the existing drainage pipelines to be embrittled and stripped, so that reinforcing steel bars are rusted and expanded, and even the drainage pipelines are cracked, leaked and damaged. In order to prevent the damage and leakage of the original underground concrete pipe from influencing the construction of the underground engineering underground excavation main body, the protection and the reconstruction of the existing drainage concrete pipe are very important.
At present, the protection and repair construction process of the urban drainage pipe network in China is complex, the construction period is long, and the cost is high; and to the transformation processing that digs the structure section and carry out original drainage pipe, only need guarantee that drainage pipe is in safe and stable state in the work progress. The construction period is short, the service life is short, the typical characteristics of the drainage pipeline construction are short, and the method is completely different from the repairing means and method of the urban pipe network.
Generally speaking, a lining pipe reinforcement protection method is generally adopted for pipeline protection in the engineering construction process, but because of the problems of size limitation of drainage pipelines, pipe wall defects and the like, how to better combine a lining material with an original drainage pipe tightly is a relatively concerned problem, and a systematic perfect construction flow is not formed for the lining pipe construction of underground engineering drainage pipelines. Therefore, it is important to design a construction method of a lining pipe of a drainage pipeline suitable for underground engineering.
Disclosure of Invention
In view of the above, the invention aims to provide a construction method for lining a pipe in a drainage pipeline, which has the advantages of short construction period, guaranteed construction quality, easiness in operation, effective prevention of leakage of the original concrete pipe, laying a good foundation for subsequent underground excavation work and no pollution to the environment.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a construction method of a lining pipe in a drainage pipeline specifically comprises the following steps:
step one, defining a construction area: determining the position of a drainage well needing to be constructed at the underground excavation structure;
step two, water cut-off of the pipeline: plugging an original drainage pipeline of the drainage well by using a water plugging device;
thirdly, draining accumulated water in the original drainage pipeline reversely: arranging a water pump inside and below the original drainage pipeline, connecting a hose, and draining accumulated water in the original drainage pipeline within the plugging range to the downstream;
step four, cleaning the pipeline: cleaning the pipeline by adopting a pipeline cleaner and cleaning dirt on the inner wall of the pipeline to ensure that the inner wall of the pipeline has no impurities and burrs;
step five, performing reverse lining operation: sleeving the lining hose outside the original drainage pipeline to be lined, and conveying the lining hose into the original drainage pipeline to be lined by using a turnover method;
step six, arranging a reinforcing steel bar ring: increasing the power of the air blower, blowing air by using the air blower, expanding the lining hose in the step five by using air pressure and enabling the lining hose to be tightly attached to the inner wall of the original drainage pipeline to form a lining hose pipeline, reducing the power of the air blower, manually entering the lining hose pipeline, and installing a reinforcing ring to support the lining hose; after the air in the lining hose is released, cutting off the end head of the lining hose;
step seven, setting an outer sleeve ring of the pipe port: the head end and the tail end of the lining hose are fixedly arranged on the well wall of the original drainage well through an outer sleeve ring and an expansion bolt;
step eight, waterproof construction of the original drainage well: and manually cleaning the original bottom plate of the drainage well chamber above the underground excavation, and brushing waterproof mortar on the original bottom plate of the drainage well chamber.
And furthermore, in the second step, water is cut off, a DN900 water shutoff device is adopted according to the pipe diameter of the original drainage pipeline, and the water shutoff device is checked before the water is cut off, so that the outer diameter leather ring is ensured to be complete.
And further, cleaning the pipelines in the fourth step, checking whether the original drainage pipelines have defects or not after the pipelines are cleaned, and repairing by adopting a mortar joint filling and back grouting method if the section loss is overlarge or the platforms are staggered and the joints are not compact.
Further, in the step five, the lining operation is performed, and the lining hose is made of PVC tarpaulin plastic-coated high-strength polyester waterproof cloth.
Further, in the step five reverse lining operation, a turnover cylinder and a turnover elbow are arranged above one end of the original drainage pipeline, the turnover elbow and the original drainage pipeline are on the same plane, and the lining hose is pulled into the original drainage pipeline through a winch.
Further, the six reinforcing steel bar rings are arranged, the reinforcing steel bar rings with the diameter of 8 are installed in the lining hose pipeline manually, and one reinforcing steel bar ring is arranged at each 1 meter.
Further, the original drainage well in the step eight is subjected to waterproof construction, and after the original drainage well chamber bottom plate is manually cleaned, M15 waterproof mortar with the thickness of 20cm is coated on the original drainage well chamber bottom plate.
Compared with the prior art, the construction method of the lining pipe in the drainage pipeline has the following advantages:
the construction method for the lining pipe of the drainage pipeline has the advantages of short construction period, guaranteed construction quality, easiness in operation, effective prevention of leakage of the original concrete pipe, laying a good foundation for subsequent underground excavation work and no pollution to the environment.
The construction method of the drain pipe lining pipe adopts the PVC tarpaulin plastic-coated high-strength polyester waterproof cloth as the lining material, has excellent waterproofness and corrosion resistance, high strength and strong tension, and adopts a unique reinforcing ring fixing mode, so that the construction quality is effectively ensured and improved, and the influence of the leakage of the original concrete pipe on the engineering construction can be effectively prevented.
The method has the advantages of short construction period, low construction cost, simple and convenient flow, strong operability, no pollution to the environment in the whole process, and easy wide popularization and application.
The construction method comprehensively and systematically shows the construction process and key points of the lining pipe, determines from the initial construction area, constructs the lining hose in the middle period, and detects the water-closing test in the later period, so as to form a set of complete construction system, visually and specifically shows the specific process of construction operation, and provides basis for the later construction of the lining pipe under similar engineering conditions.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view showing the construction layout of a lining pipe in a drainage pipeline.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A drainage pipeline lining pipe construction method comprises the following steps: determining the position of a drainage well needing to be constructed at the underground excavation structure; as shown in FIG. 1, the specific position of the drainage pipeline and the planar arrangement relation with the undercut main body and the division of the construction area are shown.
Step two, water cut-off of the pipeline: plugging an original drainage pipeline of the drainage well by using a water plugging device; adopting a DN900 water shutoff device according to the pipe diameter of the original drainage pipeline, stopping water in the pipeline, and checking the water shutoff device before water shutoff construction to ensure that an outer diameter leather ring is complete; the water plugging device corresponds to the correct position and is firmly installed, so that the good water plugging of the pipeline is ensured, and the water leakage phenomenon is avoided;
thirdly, draining accumulated water in the original drainage pipeline reversely: after water plugging is finished, arranging a water suction pump to the inside and the outside of the original drainage pipeline, connecting a hose, and guiding accumulated water in the original drainage pipeline within the plugging range to the downstream, so as to ensure the operation safety of the pipeline lining within the plugging range; determining the power and the quantity of the water pumps according to the upstream pipe diameter and the water flow to ensure that the upstream water level is kept balanced;
step four, cleaning the pipeline: the method comprises the following steps of cleaning an original drainage pipeline by adopting a pipeline cleaner and timely cleaning dirt on the inner wall of the original drainage pipeline to ensure that impurities and burrs do not exist on the inner wall of the pipeline; the pipeline can be cleaned by chemical cleaning agent, high pressure water gun, etc.; the impurities in the pipeline are completely removed, and basically removing the dirt on the inner wall of the pipeline is the cleaning standard; after cleaning the pipeline, checking whether the original drainage pipeline has defects, and if the section loss is overlarge or the conditions of slab staggering and untight joint exist, repairing by adopting a mortar joint filling and back grouting method;
step five, performing reverse lining operation: sleeving a lining hose outside an original drainage pipeline needing lining, and conveying the lining hose into the drainage pipeline needing repairing, namely the original drainage pipeline needing lining by using a turnover method; the method specifically comprises the following steps: installing a turnover cylinder and a turnover elbow above one end of the original drainage pipeline, wherein the turnover elbow is on the same plane with the original drainage pipeline, and pulling the lining hose into the original drainage pipeline through the tension of a winch; the lining hose is PVC tarpaulin plastic-coated high-strength polyester waterproof cloth which is waterproof tarpaulin, the surface is required to be flat, no damage and no leakage exist, the thickness meets the national standard, and the PVC tarpaulin plastic-coated high-strength polyester waterproof cloth is the special name of waterproof materials, namely high-strength polyester canvas coated with polyvinyl chloride organic materials. Meanwhile, in the production and manufacturing process, high-strength polyester canvas is used as base cloth, and is coated with polyvinyl chloride pasty resin which is added with an accelerating agent, a mildew preventive, an anti-aging agent and an antistatic agent, and is plasticized at high temperature to form the polyester canvas;
step six, arranging a reinforcing steel bar ring: increase air blower power earlier, use the air blower to blast the air, utilize the wind pressure to make this inside lining hose inflation and hug closely at original drainage pipe inner wall, form inside lining hose pipeline, reduce air blower power again, artifical entering inside lining hose pipeline, the inside lining hose is supported to the installation reinforcing bar ring, specifically is: manually enters the lining hose pipeline for installation
The reinforcing steel bar ring is arranged at each 1 meter; after the air in the lining hose is released, cutting off the end head of the lining hose;
step seven, setting an outer sleeve ring of the pipe port: the head end and the tail end of the lining hose are fixedly arranged on the well wall of the original drainage well through an outer sleeve ring and an expansion bolt;
step eight, waterproof construction of the original drainage well: and manually cleaning the original bottom plate of the drainage well chamber above the underground excavation, and brushing M15 waterproof mortar with the thickness of 20cm on the original bottom plate of the drainage well chamber.
The quality assurance measures during construction are as follows:
(1) before the underground construction, a ventilator is adopted to ventilate the pipeline, and a gas detector is adopted to detect underground air, so that the underground operation can be carried out after the standard of the operation air is met.
(2) The original drainage pipeline is inspected before construction, and the inspection and detection are finished by professional technicians (guidance). The number, position and damage degree of the pipelines must be correctly described when the pipelines are damaged, cracked, leaked, misplaced, deformed, corroded and the like.
(3) The measurement error of the length and the buried depth of the pipeline is preferably less than +/-5 cm, and the measurement error of the pipe diameter of the pipeline is preferably less than +/-5 mm.
(4) Before the pipe is checked, water is cut off and cut off to ensure that the upstream pipeline has no leakage. A spare water suction pump is arranged in the upstream inspection well, so that overflow of the pipe well due to plugging incompact is prevented.
(5) The bottom of the original drainage pipeline is provided with sludge, and when pollutants are attached to the inner wall of the original drainage pipeline, the original drainage pipeline must be cleaned up to drain accumulated water, so that the lining hose is prevented from being attached to the inner wall of the pipeline due to the dirt.
(6) If the connector in the original drainage pipeline is dislocated, if the dislocation size is less than 5% of the pipe diameter, the hose lining construction can be carried out without treatment; if the dislocation size exceeds 5 percent of the pipe diameter, the dislocation points are processed by methods such as hole expansion, lining slope angles, grouting and the like so as to ensure that the lining pipe is tightly attached to the inner wall of the original pipeline.
(7) The overturning cylinder and the overturning elbow are required to be firmly and reliably erected, and the pointed part and the end are passivated by polyester fiber felt, adhesive tape and the like to prevent the resin impregnated lining hose from being punctured in the overturning process.
(8) After the pipe penetrating operation of the lining hose pipe is completed, and after the air pressure in the lining hose pipe is released, the head part of the end of the lining hose pipe can be cut off, and the cut is smooth and straight.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A construction method of a lining pipe in a drainage pipeline is characterized by comprising the following steps:
step one, defining a construction area: determining the position of a drainage well needing to be constructed at the underground excavation structure;
step two, water cut-off of the pipeline: plugging an original drainage pipeline of the drainage well by using a water plugging device;
thirdly, draining accumulated water in the original drainage pipeline reversely: arranging a water pump inside and below the original drainage pipeline, connecting a hose, and draining accumulated water in the original drainage pipeline within the plugging range to the downstream;
step four, cleaning the pipeline: cleaning the pipeline by adopting a pipeline cleaner and cleaning dirt on the inner wall of the pipeline to ensure that the inner wall of the pipeline has no impurities and burrs;
step five, performing reverse lining operation: sleeving the lining hose outside the original drainage pipeline to be lined, and conveying the lining hose into the original drainage pipeline to be lined by using a turnover method;
step six, arranging a reinforcing steel bar ring: increasing the power of the air blower, blowing air by using the air blower, expanding the lining hose in the step five by using air pressure and enabling the lining hose to be tightly attached to the inner wall of the original drainage pipeline to form a lining hose pipeline, reducing the power of the air blower, manually entering the lining hose pipeline, and installing a reinforcing ring to support the lining hose; after the air in the lining hose is released, cutting off the end head of the lining hose;
step seven, setting an outer sleeve ring of the pipe port: the head end and the tail end of the lining hose are fixedly arranged on the well wall of the original drainage well through an outer sleeve ring and an expansion bolt;
step eight, waterproof construction of the original drainage well: and manually cleaning the original bottom plate of the drainage well chamber above the underground excavation, and brushing waterproof mortar on the original bottom plate of the drainage well chamber.
2. The method for constructing a liner pipe in a drainage pipeline according to claim 1, wherein: and in the second step, water is cut off, the DN900 water shutoff device is adopted according to the pipe diameter of the original drainage pipeline, and the water shutoff device is checked before the water is cut off, so that the completeness of the outer diameter leather ring is ensured.
3. The method for constructing a liner pipe in a drainage pipeline according to claim 1, wherein: and cleaning the pipelines, checking whether the original drainage pipelines have defects or not after the pipelines are cleaned, and repairing by adopting a mortar joint filling and back grouting method if the section loss is overlarge or the slab staggering and the joint are not compact.
4. The method for constructing a liner pipe in a drainage pipeline according to claim 1, wherein: and fifthly, performing reverse lining operation, wherein the lining hose is PVC tarpaulin plastic-coated high-strength polyester waterproof cloth.
5. The method for constructing a liner pipe in a drainage pipeline according to claim 1, wherein: and fifthly, performing reverse lining operation, namely installing a turnover cylinder and a turnover elbow above one end of the original drainage pipeline, wherein the turnover elbow is on the same plane with the original drainage pipeline, and pulling the lining hose into the original drainage pipeline through a winch.
6. The method for constructing a liner pipe in a drainage pipeline according to claim 1, wherein: step six, arranging the reinforcing steel bar ring, and manually entering the lining hose pipeline for installation
The reinforcing steel bar ring is arranged at the position of every 1 meter.
7. The method for constructing a liner pipe in a drainage pipeline according to claim 1, wherein: and step eight, performing waterproof construction on the original drainage well, manually cleaning the bottom plate of the original drainage well chamber, and then coating M15 waterproof mortar with the thickness of 20cm on the bottom plate of the original drainage well chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221728.6A CN110847324A (en) | 2019-12-03 | 2019-12-03 | Construction method for lining pipe of drainage pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911221728.6A CN110847324A (en) | 2019-12-03 | 2019-12-03 | Construction method for lining pipe of drainage pipeline |
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| CN110847324A true CN110847324A (en) | 2020-02-28 |
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| CN201911221728.6A Pending CN110847324A (en) | 2019-12-03 | 2019-12-03 | Construction method for lining pipe of drainage pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789023A (en) * | 2021-10-08 | 2021-12-14 | 大庆恒辉石油钻采技术有限公司 | Formula of impermeable layer of liner composite hose of petrochemical pipeline |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644529A (en) * | 2018-03-27 | 2018-10-12 | 上海潜业市政工程有限公司 | A kind of cipp cured-in-place rehabilitations device and restorative procedure |
| CN208841657U (en) * | 2018-08-22 | 2019-05-10 | 河南中拓石油工程技术股份有限公司 | A kind of pipeline CIPP liner vapor solidification control device |
| CN110056741A (en) * | 2019-04-26 | 2019-07-26 | 上海誉帆环境科技有限公司 | A kind of prosthetic device and restorative procedure for CIPP pipeline |
| CN209278722U (en) * | 2018-10-31 | 2019-08-20 | 浙江震业建设有限公司 | A kind of convertible liner hose for pipeline rehabilitation |
| CN209354855U (en) * | 2018-09-21 | 2019-09-06 | 杭州德勤市政工程有限公司 | A kind of hydraulic pressure turnover device of pipeline no-dig technique integral lining reparation |
| CN110307440A (en) * | 2019-06-19 | 2019-10-08 | 北京四达基业市政建设工程有限公司 | A kind of pipeline inverted liner restorative procedure |
-
2019
- 2019-12-03 CN CN201911221728.6A patent/CN110847324A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644529A (en) * | 2018-03-27 | 2018-10-12 | 上海潜业市政工程有限公司 | A kind of cipp cured-in-place rehabilitations device and restorative procedure |
| CN208841657U (en) * | 2018-08-22 | 2019-05-10 | 河南中拓石油工程技术股份有限公司 | A kind of pipeline CIPP liner vapor solidification control device |
| CN209354855U (en) * | 2018-09-21 | 2019-09-06 | 杭州德勤市政工程有限公司 | A kind of hydraulic pressure turnover device of pipeline no-dig technique integral lining reparation |
| CN209278722U (en) * | 2018-10-31 | 2019-08-20 | 浙江震业建设有限公司 | A kind of convertible liner hose for pipeline rehabilitation |
| CN110056741A (en) * | 2019-04-26 | 2019-07-26 | 上海誉帆环境科技有限公司 | A kind of prosthetic device and restorative procedure for CIPP pipeline |
| CN110307440A (en) * | 2019-06-19 | 2019-10-08 | 北京四达基业市政建设工程有限公司 | A kind of pipeline inverted liner restorative procedure |
Non-Patent Citations (1)
| Title |
|---|
| 蒋柱武，黄天寅: "《给排水管道工程》", 31 March 2011, 同济大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789023A (en) * | 2021-10-08 | 2021-12-14 | 大庆恒辉石油钻采技术有限公司 | Formula of impermeable layer of liner composite hose of petrochemical pipeline |
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Application publication date: 20200228 |