CN113124260A - Drainage pipeline local resin curing construction method - Google Patents
Drainage pipeline local resin curing construction method Download PDFInfo
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- CN113124260A CN113124260A CN202110524470.8A CN202110524470A CN113124260A CN 113124260 A CN113124260 A CN 113124260A CN 202110524470 A CN202110524470 A CN 202110524470A CN 113124260 A CN113124260 A CN 113124260A
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- repairing
- epoxy resin
- pipeline
- glass fiber
- construction method
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- 229920005989 resin Polymers 0.000 title claims abstract description 34
- 239000011347 resin Substances 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 63
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 63
- 239000003365 glass fiber Substances 0.000 claims abstract description 60
- 230000008439 repair process Effects 0.000 claims abstract description 41
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000009736 wetting Methods 0.000 abstract 2
- 238000000227 grinding Methods 0.000 abstract 1
- 238000007790 scraping Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1653—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being pressed into contact with the pipe by a tool which moves inside along the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a drainage pipeline local resin curing construction method, which comprises the following steps: preparing before repairing, namely plugging a pipe section where a repairing point of a drainage pipeline is located; calculating the area of the repair point, and determining the area of the repair point; preparing epoxy resin, and fully mixing the composite epoxy resin; coating epoxy resin, namely uniformly coating the mixed resin on glass fiber, and performing double-sided wetting, grinding and scraping to realize full wetting; installing glass fiber, and installing the glass fiber coated with epoxy resin on the special repairing device in the step S4; moving the mending device to a designated leakage point under the guidance of the endoscopic equipment of the pipeline; and inflating, namely inflating the repairing device through an inflating device. The invention can directly repair the pipeline through the epoxy resin without digging a drainage pipeline, can make the pipeline repair more convenient and can effectively save the repair cost.
Description
Technical Field
The invention relates to the technical field of pipeline repair, in particular to a drainage pipeline local resin curing construction method.
Background
The sewer is an urban public facility and refers to a pipeline for discharging sewage and rainwater from a building; also refers to underground channels for removing sewage and rainwater in cities, factories or villages;
the urban trunk road is busy in traffic, the excavation and repair of the drainage pipeline under the municipal road often cause great influence on ground traffic, and the trenchless pipeline repair scheme has obvious economic benefit advantages.
Disclosure of Invention
The invention aims to provide a drainage pipeline local resin curing construction method to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a drainage pipeline local resin curing construction method comprises the following steps:
s1, preparing before repairing, namely plugging a pipe section where a repairing point of the drainage pipeline is located to reduce local water flow of the repairing point, and cleaning the place needing repairing in the drainage pipeline through corresponding cleaning equipment to ensure that the repairing point of the drainage pipeline is clean;
step S2, calculating the area of the repair point, detecting the repair point of the drainage pipeline by using a pipeline closed-circuit television, determining the area of the repair point, and cutting the glass fiber material for repair according to the size of the area of the repair point;
step S3, preparing epoxy resin, weighing the epoxy resin by using a measuring tool through calculating the using amount of the resin, fully mixing the composite epoxy resin, adding a curing agent into the epoxy resin, wherein the mixing ratio of the fixing agent to the epoxy resin is 1:2, and fully mixing the epoxy resin by using stirring equipment for 2-5 min;
step S4, coating epoxy resin, and uniformly coating the mixed resin on glass fiber, wherein the two sides of the glass fiber are required to be soaked, ground and scraped to realize full soaking;
step S5, installing glass fiber, and installing the glass fiber coated with epoxy resin in the step S4 on a special repairing device;
step S6, moving the mending device to the appointed leakage point by the guide of the endoscope device;
step S7, inflating, namely, connecting the repairing device with inflating equipment, inflating the repairing device through the inflating equipment to enable the repairing device to reach a certain pressure, and enabling the glass fiber on the outer side of the repairing device to be in contact with the inner wall of the pipeline;
step S8, maintaining pressure, wherein the pressure of the repairing device needs to be maintained during the solidification of the composite epoxy resin, so that the glass fiber is always in contact with the inner wall of the pipeline;
step S9, the repairing device is removed, and the repairing device is deflated, so that the composite epoxy resin is solidified, and the glass fiber is tightly adhered to the inner wall of the pipeline;
step S10, checking, namely, taking out the repairing device, checking the repairing point of the pipeline through the endoscopic equipment and confirming whether the repairing is finished;
further, in step S1, the drainage pipeline to be repaired needs to have a substantially stable structure, no obvious change in pipeline line shape, and a firm and non-crisp pipeline wall body;
further, in the step S1, impurities such as mud and the like need to be removed from the repaired position inside the pipeline, and the repaired position of the pipeline is washed by using a high-pressure water gun;
further, the thickness of the glass fiber in the step S2 is 1mm-3 mm;
further, in the step S5, in installing the glass fiber, the repairing device is a repairing airbag, and the glass fiber is disposed outside the repairing airbag;
further, in the step S6, when the pipe diameter is above 800mm and is a large or extra-large pipe, a constructor can directly enter the pipe to place a repairing device;
further, in the step S8, in maintaining the pressure, the pressure time required to maintain the repair device is 2-5 hours, and the curing time of the composite epoxy resin is 2-4 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, drainage pipelines do not need to be excavated, the pipelines can be directly repaired by epoxy resin, the pipelines can be repaired more conveniently, and the repair cost can be effectively saved;
2. the composite epoxy resin and the glass fiber are used for repairing the pipeline repairing point, so that the repairing time is short, the composite epoxy resin and the glass fiber can resist acid and alkali corrosion, a watertight cavity is formed, the cohesiveness is high, and the flexibility is certain;
3. the construction method is convenient, the construction equipment is small in size, the equipment is convenient to transfer, and the construction is harmless, economic and environment-friendly.
Drawings
FIG. 1 is a schematic view of the overall process of the construction method for local resin curing of drainage pipelines according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
Referring to fig. 1, the present invention provides a technical solution:
a drainage pipeline local resin curing construction method comprises the following steps:
s1, preparing before repairing, namely plugging a pipe section where a repairing point of the drainage pipeline is located to reduce local water flow of the repairing point, and cleaning the place needing repairing in the drainage pipeline through corresponding cleaning equipment to ensure that the repairing point of the drainage pipeline is clean;
step S2, calculating the area of the repair point, detecting the repair point of the drainage pipeline by using a pipeline closed-circuit television, determining the area of the repair point, and cutting the glass fiber material for repair according to the size of the area of the repair point;
step S3, preparing epoxy resin, weighing the epoxy resin by using a measuring tool through calculating the using amount of the resin, fully mixing the composite epoxy resin, adding a curing agent into the epoxy resin, wherein the mixing ratio of the fixing agent to the epoxy resin is 1:2, and fully mixing the epoxy resin by using stirring equipment for 2-5 min;
step S4, coating epoxy resin, and uniformly coating the mixed resin on glass fiber, wherein the two sides of the glass fiber are required to be soaked, ground and scraped to realize full soaking;
step S5, installing glass fiber, and installing the glass fiber coated with epoxy resin in the step S4 on a special repairing device;
step S6, moving the mending device to the appointed leakage point by the guide of the endoscope device;
step S7, inflating, namely, connecting the repairing device with inflating equipment, inflating the repairing device through the inflating equipment to enable the repairing device to reach a certain pressure, and enabling the glass fiber on the outer side of the repairing device to be in contact with the inner wall of the pipeline;
step S8, maintaining pressure, wherein the pressure of the repairing device needs to be maintained during the solidification of the composite epoxy resin, so that the glass fiber is always in contact with the inner wall of the pipeline;
step S9, the repairing device is removed, and the repairing device is deflated, so that the composite epoxy resin is solidified, and the glass fiber is tightly adhered to the inner wall of the pipeline;
in the present invention, step S10 is to take out the repairing device, and inspect the repairing point of the pipeline by the endoscope device to confirm whether the repairing is completed;
in the invention, in step S1, the drainage pipeline to be repaired needs to have a basically stable structure, no obvious change of pipeline line shape and firm and non-crisp pipeline wall body;
in the step S1, sundries such as mud and the like need to be removed from the repaired position inside the pipeline, and the repaired position of the pipeline is washed by using a high-pressure water gun;
in the invention, the thickness of the glass fiber in the step S2 is 1mm-3 mm;
in the present invention, in step S5, in installing the glass fiber, the repairing device is a repairing airbag, and the glass fiber is disposed outside the repairing airbag;
in the present invention, in step S8, the pressure of the repair device needs to be maintained for 2-5 hours while maintaining the pressure, and the curing time of the composite epoxy resin is 2-4 hours.
Example 2
Referring to fig. 1, the present invention provides a technical solution:
a drainage pipeline local resin curing construction method comprises the following steps:
s1, preparing before repairing, namely plugging a pipe section where a repairing point of the drainage pipeline is located to reduce local water flow of the repairing point, and cleaning the place needing repairing in the drainage pipeline through corresponding cleaning equipment to ensure that the repairing point of the drainage pipeline is clean;
step S2, calculating the area of the repair point, detecting the repair point of the drainage pipeline by using a pipeline closed-circuit television, determining the area of the repair point, and cutting the glass fiber material for repair according to the size of the area of the repair point;
step S3, preparing epoxy resin, weighing the epoxy resin by using a measuring tool through calculating the using amount of the resin, fully mixing the composite epoxy resin, adding a curing agent into the epoxy resin, wherein the mixing ratio of the fixing agent to the epoxy resin is 1:2, and fully mixing the epoxy resin by using stirring equipment for 2-5 min;
step S4, coating epoxy resin, and uniformly coating the mixed resin on glass fiber, wherein the two sides of the glass fiber are required to be soaked, ground and scraped to realize full soaking;
step S5, installing glass fiber, and installing the glass fiber coated with epoxy resin in the step S4 on a special repairing device;
step S6, moving the repairing device, when the pipe diameter is above 800mm and the pipe is large or super large, the constructor can directly enter the pipe to place the repairing device;
step S7, inflating, namely, connecting the repairing device with inflating equipment, inflating the repairing device through the inflating equipment to enable the repairing device to reach a certain pressure, and enabling the glass fiber on the outer side of the repairing device to be in contact with the inner wall of the pipeline;
step S8, maintaining pressure, wherein the pressure of the repairing device needs to be maintained during the solidification of the composite epoxy resin, so that the glass fiber is always in contact with the inner wall of the pipeline;
step S9, the repairing device is removed, and the repairing device is deflated, so that the composite epoxy resin is solidified, and the glass fiber is tightly adhered to the inner wall of the pipeline;
in the present invention, step S10 is to take out the repairing device, and inspect the repairing point of the pipeline by the endoscope device to confirm whether the repairing is completed;
in the invention, in step S1, the drainage pipeline to be repaired needs to have a basically stable structure, no obvious change of pipeline line shape and firm and non-crisp pipeline wall body;
in the step S1, sundries such as mud and the like need to be removed from the repaired position inside the pipeline, and the repaired position of the pipeline is washed by using a high-pressure water gun;
in the invention, the thickness of the glass fiber in the step S2 is 1mm-3 mm;
in the present invention, in step S5, in installing the glass fiber, the repairing device is a repairing airbag, and the glass fiber is disposed outside the repairing airbag;
in the present invention, in step S8, the pressure of the repair device needs to be maintained for 2-5 hours while maintaining the pressure, and the curing time of the composite epoxy resin is 2-4 hours.
Example 3
A drainage pipeline local resin curing construction method comprises the following steps:
s1, preparing before repairing, namely plugging a pipe section where a repairing point of the drainage pipeline is located to reduce local water flow of the repairing point, and cleaning the place needing repairing in the drainage pipeline through corresponding cleaning equipment to ensure that the repairing point of the drainage pipeline is clean;
step S2, calculating the area of the repair point, detecting the repair point of the drainage pipeline by using a pipeline closed-circuit television, determining the area of the repair point, and cutting the glass fiber material for repair according to the size of the area of the repair point;
step S3, preparing epoxy resin, weighing the epoxy resin by using a measuring tool through calculating the using amount of the resin, fully mixing the composite epoxy resin, adding a curing agent into the epoxy resin, wherein the mixing ratio of the fixing agent to the epoxy resin is 1:2, and fully mixing the epoxy resin by using stirring equipment for 3 min;
step S4, coating epoxy resin, and uniformly coating the mixed resin on glass fiber, wherein the two sides of the glass fiber are required to be soaked, ground and scraped to realize full soaking;
step S5, installing glass fiber, and installing the glass fiber coated with epoxy resin in the step S4 on a special repairing device;
step S6, moving the mending device to the appointed leakage point by the guide of the endoscope device;
step S7, inflating, namely, connecting the repairing device with inflating equipment, inflating the repairing device through the inflating equipment to enable the repairing device to reach a certain pressure, and enabling the glass fiber on the outer side of the repairing device to be in contact with the inner wall of the pipeline;
step S8, maintaining pressure, wherein the pressure of the repairing device needs to be maintained during the solidification of the composite epoxy resin, so that the glass fiber is always in contact with the inner wall of the pipeline;
step S9, the repairing device is removed, and the repairing device is deflated, so that the composite epoxy resin is solidified, and the glass fiber is tightly adhered to the inner wall of the pipeline;
step S10, taking out the repairing device, checking the repairing point of the pipeline through the endoscope device, and confirming whether the repairing is finished;
in the step S1, the drainage pipeline to be repaired needs to have a substantially stable structure, no obvious change in pipeline line shape, and a firm and non-crisp pipeline wall body;
in the step S1, sundries such as mud need to be removed from the repaired position inside the pipeline, and the repaired position of the pipeline is washed by using a high-pressure water gun;
the thickness of the glass fiber in the step S2 is 3 mm;
the step S5, in installing the glass fiber, the repairing device is a repairing air bag, and the glass fiber is arranged outside the repairing air bag;
in the step S6, when the pipe diameter is more than 800mm and a large or extra-large pipeline is adopted, a constructor can directly enter the pipeline to place a repairing device;
in step S8, in maintaining the pressure, the pressure time required to maintain the repair device is 4 hours, and the curing time of the composite epoxy resin is 3 hours.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A drainage pipeline local resin curing construction method is characterized by comprising the following steps:
s1, preparing before repairing, namely plugging a pipe section where a repairing point of the drainage pipeline is located to reduce local water flow of the repairing point, and cleaning the place needing repairing in the drainage pipeline through corresponding cleaning equipment to ensure that the repairing point of the drainage pipeline is clean;
step S2, calculating the area of the repair point, detecting the repair point of the drainage pipeline by using a pipeline closed-circuit television, determining the area of the repair point, and cutting the glass fiber material for repair according to the size of the area of the repair point;
step S3, preparing epoxy resin, weighing the epoxy resin by using a measuring tool through calculating the using amount of the resin, fully mixing the composite epoxy resin, adding a curing agent into the epoxy resin, wherein the mixing ratio of the fixing agent to the epoxy resin is 1:2, and fully mixing the epoxy resin by using stirring equipment for 2-5 min;
step S4, coating epoxy resin, and uniformly coating the mixed resin on glass fiber, wherein the two sides of the glass fiber are required to be soaked, ground and scraped to realize full soaking;
step S5, installing glass fiber, and installing the glass fiber coated with epoxy resin in the step S4 on a special repairing device;
step S6, moving the mending device to the appointed leakage point by the guide of the endoscope device;
step S7, inflating, namely, connecting the repairing device with inflating equipment, inflating the repairing device through the inflating equipment to enable the repairing device to reach a certain pressure, and enabling the glass fiber on the outer side of the repairing device to be in contact with the inner wall of the pipeline;
step S8, maintaining pressure, wherein the pressure of the repairing device needs to be maintained during the solidification of the composite epoxy resin, so that the glass fiber is always in contact with the inner wall of the pipeline;
step S9, the repairing device is removed, and the repairing device is deflated, so that the composite epoxy resin is solidified, and the glass fiber is tightly adhered to the inner wall of the pipeline;
in step S10, the repair device is removed, and the repair point of the pipe is inspected by the endoscope apparatus to confirm whether or not the repair is completed.
2. The partial resin curing construction method for the drainage pipeline according to claim 1, wherein the partial resin curing construction method comprises the following steps: in step S1, the drainage pipeline to be repaired needs to have a substantially stable structure, no significant change in pipeline line shape, and a firm and non-crisp pipeline wall.
3. The partial resin curing construction method for the drainage pipeline according to claim 1, wherein the partial resin curing construction method comprises the following steps: in the step S1, sundries such as mud need to be removed from the repaired part inside the pipeline, and the repaired part of the pipeline is washed by using a high-pressure water gun.
4. The partial resin curing construction method for the drainage pipeline according to claim 1, wherein the partial resin curing construction method comprises the following steps: the thickness of the glass fiber in the step S2 is 1mm-3 mm.
5. The partial resin curing construction method for the drainage pipeline according to claim 1, wherein the partial resin curing construction method comprises the following steps: in the step S5, the glass fiber is installed, and the repairing device is a repairing air bag, and the glass fiber is disposed outside the repairing air bag.
6. The partial resin curing construction method for the drainage pipeline according to claim 1, wherein the partial resin curing construction method comprises the following steps: in the step S6, when the pipe diameter is above 800mm and is a large or extra-large pipe, a constructor can directly enter the pipe to place a repairing device.
7. The partial resin curing construction method for the drainage pipeline according to claim 1, wherein the partial resin curing construction method comprises the following steps: in the step S8, in maintaining the pressure, the pressure time required to maintain the repairing device is 2-5h, and the curing time of the composite epoxy resin is 2-4 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110524470.8A CN113124260A (en) | 2021-05-13 | 2021-05-13 | Drainage pipeline local resin curing construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110524470.8A CN113124260A (en) | 2021-05-13 | 2021-05-13 | Drainage pipeline local resin curing construction method |
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Cited By (1)
| 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 |
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2021
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Cited By (1)
| 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 |
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