CN110565779B - Method for trenchless replacement and repair of sewage pipeline - Google Patents
Method for trenchless replacement and repair of sewage pipeline Download PDFInfo
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- CN110565779B CN110565779B CN201910826330.9A CN201910826330A CN110565779B CN 110565779 B CN110565779 B CN 110565779B CN 201910826330 A CN201910826330 A CN 201910826330A CN 110565779 B CN110565779 B CN 110565779B
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- pipeline
- inner supports
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- 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
Abstract
The invention relates to a method for replacing and repairing a sewage pipeline in a non-excavation manner, which comprises the steps of excavating a well to the depth of a pipeline to be connected, removing soil at the position of a missing pipeline, reserving the well to a conveying space of the pipeline to be connected, preparing a plurality of sections of inner supports with hollow channels, sequentially pushing the inner supports to the positions of the pipeline to be connected through the conveying space, butting the hollow channels of two adjacent inner supports, enabling the hollow channels of the inner supports to extend from the well to the pipeline to be connected, conveying a new pipeline to the position of the pipeline to be connected through the hollow channels of the inner supports, completing butting of the new pipeline and the pipeline to be connected, filling the soil back, repairing the well and completing repairing. The invention completes non-excavation pipeline repair under the condition of limited pavement space operation, has small construction noise and small influence on the surrounding environment compared with large-scale instruments, and effectively avoids road collapse and settlement; the method reduces the damage and the adverse effect of the foundation of the surrounding building, solves the interference of the traditional excavation construction to the life of residents, and has higher social and economic effects.
Description
Technical Field
The invention relates to a method for repairing a sewage pipeline in a non-excavation replacement mode.
Background
At present, along with the increasing frequency of road construction, the condition that equipment cuts off a sewage pipe network below a road is also very common. In the prior art, the repairing is carried out by excavating, digging and removing soil bodies manually or by an excavator, digging out the damaged pipelines (or digging out the space where the pipelines are lost), paving a sand cushion layer, newly paving the pipelines, and backfilling the soil body after concrete is wrapped and maintained to finish the repairing. However, when the road section is in an urban area or an area with high traffic pressure and the excavation construction cannot be carried out, if the road section is damaged or the sewage pipeline is really too long, the pipeline repairing work cannot be effectively finished; and once the pipeline is lost, the road surface can be collapsed, and great potential safety hazard is caused.
Disclosure of Invention
The invention aims to provide a method for replacing and repairing a sewage pipeline in a non-excavation mode, which is applied to water conservancy municipal pipelines, and particularly aims at the condition that an underground sewage pipeline is missing.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method of trenchless rehabilitation of a sewer line, comprising:
s1: digging a well downwards to the depth of the pipeline to be connected, removing soil at the position of the missing pipeline, reserving a conveying space from the well to the pipeline to be connected,
s2: preparing a plurality of sections of inner supports with hollow channels, pushing the inner supports to the position of a pipeline to be connected through a conveying space in sequence, butting the hollow channels of two adjacent inner supports, extending the hollow channels of the inner supports from a well to the pipeline to be connected,
s3: conveying the new pipeline to the pipeline to be connected through the hollow channel of the inner support, completing butt joint of the new pipeline and the pipeline to be connected,
s4: and (5) backfilling soil, repairing the well and finishing the repair.
Preferably, before S1: and judging the condition of the pipeline to be repaired, and evaluating the position of the shaft.
Preferably, in S1: the opening of the hoistway is sized to allow access to the inner brace.
Preferably, in S1: before excavation, plugging the upper part and the lower part of a pipeline to be connected, and draining accumulated water in the pipeline.
Preferably, in S1: and after the soil in the conveying space is removed, leveling is carried out.
Preferably, in S2: the multi-section internal supports are butted at the mouth part of the conveying space, and the multi-section internal supports are gradually jacked to the position of the pipeline to be jointed one by one through the jack.
Preferably, in S2: the inner support is made of steel, the inner diameter of the inner support is 900mm, the width of the inner support is 400 mm, and the wall thickness of the inner support is 3-5 mm.
Preferably, in S3: preparing the hoop and the sealing ring, and when the new pipeline is butted with the pipeline to be connected: and wrapping the new pipeline and the pipeline to be connected by using the hoop, and sealing a gap between the new pipeline and the pipeline to be connected by using a sealing ring.
Further preferably, after the new pipeline is butted with the pipeline to be connected, cement mortar is used for wrapping the whitewash, and meanwhile, ultraviolet curing repair is used for reinforcing and sealing all the joints of the pipeline.
Further preferably, after the new pipeline is butted with the pipeline to be connected, brick protection is performed around the new pipeline.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:
1. under the condition of limited pavement space operation, the trenchless pipeline repairing is completed, compared with large-scale equipment, the construction noise is small, the influence on the surrounding environment is small, and the collapse and settlement of roads can be effectively avoided;
2. the method has the advantages that traffic can not be obstructed, green lands and vegetation can not be destroyed, normal life and work order of shops, hospitals, schools and residents can not be influenced for traffic and environment, destruction and adverse effects of the foundations of peripheral buildings are reduced, interference of traditional excavation construction to lives of the residents is avoided, and the method has a high social and economic effect.
Drawings
FIG. 1 is a first process flow diagram of the present example;
FIG. 2 is a second process flow diagram of the present example.
Wherein: 1. a pavement; 2. a hoistway; 3. a conveyance space; 4. internal bracing; 5. a jack; 6. a pipeline to be connected; 7. and (5) new pipelines.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2: a method of trenchless rehabilitation of a sewer line, comprising:
preparing materials: internal bracing: the inner diameter of the steel material is 700-900mm, the width is 400-600mm, the wall thickness is 3-5mm, the steel material is assembled in multiple sections, each section is divided into 2-4 blocks which can bear the weight,
the new pipeline: the material and the pipe diameter of the pipe are matched with those of the original pipe optimally,
one hoop, one jack and a plurality of rubber rings (sealing rings).
The condition of the pipeline to be repaired is judged, and the position of the shaft is evaluated, so that the road surface driving area, the road section which is not suitable to be excavated and the like are usually avoided. Before excavation, the upper portion and the lower portion of a pipeline to be connected are blocked, accumulated water in the pipeline is removed, a well is excavated downwards to the depth of the pipeline to be connected, an inner support is allowed to enter the opened well, soil at the position of a missing pipeline is removed and leveled, and a conveying space from the well to the pipeline to be connected is reserved.
After leveling is finished, the customized internal supports are lowered into a well, the multiple sections of internal supports are butted at the mouth of a conveying space, the multiple sections of internal supports are sequentially jacked one by a jack to the excavated soil body, the length required by actual needs is up to the position connected to a pipeline to be connected, hollow channels of two adjacent internal supports are butted, and the hollow channels of the internal supports extend from the well to the pipeline to be connected.
Conveying the new pipeline to the position of the pipeline to be connected through the hollow channel of the inner support, completing butt joint of the new pipeline and the pipeline to be connected, and during butt joint: the new pipeline and the pipeline to be connected are wrapped by using the anchor ear, a gap between the new pipeline and the pipeline to be connected is sealed by using the rubber ring, after butt joint is completed, cement mortar is used for wrapping the whitewash, meanwhile, all joints of the pipeline are reinforced and sealed by using ultraviolet curing repair, and brick protection is carried out around the new pipeline.
And finally, backfilling soil, repairing the well and finishing the repair.
Example (b): when a sewage pipe at the intersection of the department front street in Suzhou city and the West lanqiang lane is constructed due to the way management, the sewage pipe conflicts with the elevation of the existing sewage pipe, the sewage pipe is dug off and filled with soil, so that the sewage pipe network at the intersection is lost by 2.6 meters from a sewage well to the east, and the sewage at the West lanqiang lane cannot be discharged. And then the sewage well is rectified and repaired by a channel and channel construction party after investigation, the interior of the sewage well is excavated to the east in the road construction party, so that the road surface is hollow by about 80 centimeters downwards, safety accidents are very likely to occur, meanwhile, the problem point is located in a central urban area, the traffic flow is large, and the sewage well has a water supply pipeline to the east 2 meters and does not have excavation conditions.
After the field situation is preliminarily known, the DN800 steel inner support with the thickness of 4mm and the length of 50cm is arranged below the road, so that the underground operation safety of workers is guaranteed, and the possibility of road collapse can be reduced. Because this section pipeline is in operation already, need to carry out the shutoff to this section pipeline section low reaches and get rid of the original deposit water of pipeline, carry out interim this section pipeline section drainage of skipping simultaneously (the upper reaches sets up and faces the row of pump or soil pick-up car regularly and suck away upper reaches sewage), and because the irregularity of soil body, need clear away the soil body, the flattening, after the flattening is ended, with the good steel internal stay of customization down to the well, the multisection steel internal stay docks at the well bottom, will multisection internal stay push up one by one gradually through the jack and send to in the soil body of digging out, according to the required length of actual needs, until being connected to the position of waiting to connect the pipeline, the hollow channel butt joint of two adjacent internal stays, and make the hollow channel of internal stay extend to waiting to say from the well. Conveying the new pipeline to the position of the pipeline to be connected through the hollow channel of the inner support, completing butt joint of the new pipeline and the pipeline to be connected, and during butt joint: the new pipeline and the pipeline to be connected are wrapped by using the anchor ear, a gap between the new pipeline and the pipeline to be connected is sealed by using the rubber ring, after butt joint is completed, cement mortar is used for wrapping the whitewash, meanwhile, all joints of the pipeline are reinforced and sealed by using ultraviolet curing repair, and brick protection is carried out around the new pipeline. And soil is backfilled to repair the well chamber, and the repairing work is completed.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. A method for trenchless replacement and repair of a sewage pipeline is characterized by comprising the following steps: the method comprises the following steps:
s1: before excavation, plugging the upper part and the lower part of a pipeline to be connected, removing accumulated water in the pipeline, excavating a well downwards to the depth of the pipeline to be connected, removing soil at the position of a missing pipeline, reserving a conveying space from the well to the pipeline to be connected,
s2: preparing a plurality of sections of inner supports with hollow channels, wherein the inner supports are steel inner supports, the inner diameter of the inner supports is 900mm, the width of the inner supports is 400 mm, the wall thickness of the inner supports is 3-5mm, the inner supports are assembled in a plurality of sections, each section is divided into 2-4 blocks which can bear the weight, so that the underground operation safety of workers is guaranteed, the possibility of road collapse is reduced, the size of an opening of a well way allows the inner supports to enter, the inner supports are sequentially pushed to the positions of the pipelines to be connected through a conveying space, the hollow channels of two adjacent inner supports are butted, and the hollow channels of the inner supports extend to the pipelines to be connected from the well way,
s3: preparing the hoop and the sealing ring, and when the new pipeline is butted with the pipeline to be connected: conveying a new pipeline to a pipeline to be connected through a hollow channel of an inner support, wrapping the new pipeline and the pipeline to be connected by using a hoop, sealing a gap between the new pipeline and the pipeline to be connected by using a sealing ring, wrapping whitewash by using cement mortar after the butt joint of the new pipeline and the pipeline to be connected is completed, reinforcing and sealing all joints of the pipeline by using ultraviolet curing repair, and performing brick protection around the new pipeline,
s4: and (5) backfilling soil, repairing the well and finishing the repair.
2. The method of trenchless rehabilitation of a sewer line of claim 1, further comprising: before S1: and judging the condition of the pipeline to be repaired, and evaluating the position of the shaft.
3. The method of trenchless rehabilitation of a sewer line of claim 1, further comprising: in S1: and after the soil in the conveying space is removed, leveling is carried out.
4. The method of trenchless rehabilitation of a sewer line of claim 1, further comprising: in S2: the multi-section internal supports are butted at the mouth part of the conveying space, and the multi-section internal supports are gradually jacked to the position of the pipeline to be jointed one by one through the jack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910826330.9A CN110565779B (en) | 2019-09-03 | 2019-09-03 | Method for trenchless replacement and repair of sewage pipeline |
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| CN201910826330.9A CN110565779B (en) | 2019-09-03 | 2019-09-03 | Method for trenchless replacement and repair of sewage pipeline |
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| CN110565779B true CN110565779B (en) | 2021-07-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110965487B (en) * | 2019-12-20 | 2023-12-08 | 广西建工集团第五建筑工程有限责任公司 | Down-pass passage high-flow reverse-suction siphon sewage pipe and encapsulation treatment construction method |
| CN111156020B (en) * | 2020-01-03 | 2021-03-16 | 温州市宏泰建设有限公司 | Non-excavation maintenance equipment for sewer line and construction method thereof |
| CN112709313B (en) * | 2020-12-31 | 2022-04-19 | 苏州凯达市政景观建设有限公司 | Municipal sewage pipeline trenchless construction equipment and method |
| CN113374931B (en) * | 2021-06-29 | 2023-06-27 | 中冶南方城市建设工程技术有限公司 | Non-excavation capacity-expansion method for old urban pipeline |
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| CN108843857A (en) * | 2018-07-03 | 2018-11-20 | 四川先舟建设工程有限公司 | A kind of municipal pipeline constructing device and construction method |
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| CN206973157U (en) * | 2017-07-01 | 2018-02-06 | 健管（厦门）环境科技有限公司 | A kind of Non-excavation pipeline restoration device and renovation technique of short tube connection |
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| JP2007064373A (en) * | 2005-08-31 | 2007-03-15 | Nihon Pipe Cleaning:Kk | Piping repair method |
| KR20100027768A (en) * | 2008-09-03 | 2010-03-11 | 쌍용건설 주식회사 | Non-excavation type sewer repairing apparatus having packer and method for it |
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Address after: 215000 Room 501, No.77, South Tiancheng Road, high speed rail new town, Xiangcheng District, Suzhou City, Jiangsu Province Applicant after: Suzhou Pinghai drainage Service Co.,Ltd. Address before: 215000 Room 502, 232 Daoqian street, Suzhou City, Jiangsu Province Applicant before: Suzhou Pinghai drainage Service Co.,Ltd. |
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