CN109208737B - Construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation - Google Patents
Construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation Download PDFInfo
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- CN109208737B CN109208737B CN201811180792.XA CN201811180792A CN109208737B CN 109208737 B CN109208737 B CN 109208737B CN 201811180792 A CN201811180792 A CN 201811180792A CN 109208737 B CN109208737 B CN 109208737B
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- 238000010276 construction Methods 0.000 title claims abstract description 58
- 239000010865 sewage Substances 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 100
- 239000010959 steel Substances 0.000 claims abstract description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000009412 basement excavation Methods 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 8
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009189 diving Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention provides a construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation. The construction method specifically comprises the steps of firstly constructing a new pipe receiving well beside an existing working well adjacent to an original sewage pipeline, and sinking the wall of the existing working well to enable the new pipe receiving well to be communicated with the existing working well; then, temporary plugging flashboard is adopted in the existing working well to temporarily plug the original sewage pipe, the temporary plugging flashboard comprises a grid steel frame and a steel baffle, after the temporary plugging flashboard is installed, a diver descends into the well to plug the original sewage pipe at the downstream part of the temporary plugging flashboard by using masonry strip stones, and after the plugging is completed, underwater concrete is poured between the temporary gate valve and the plug. According to the invention, the temporary flashboard is adopted for temporary plugging, so that the impact force of water flow can be reduced, the impact force of water flow on divers and plugging walls is reduced, the operation risk is reduced, the plugging construction quality is improved, and the construction risk in the subway deep foundation pit excavation process is reduced.
Description
Technical Field
The invention relates to a construction method for plugging a sewage pipeline by constructing a new pipe receiving well outside an existing sewage working well, plugging the new pipe receiving well with an original pipe working well, and then arranging a temporary flashboard in the original pipe working well to create a safe environment for a diver to work underwater.
Background
Along with the rapid development of urban subways, large sewage pipelines often exist in the subway construction process to cross station foundation pits, the most critical steps in the transfer and modification process are connection and plugging construction, and many projects have water leakage accidents in the later foundation pit excavation process because the original pipelines are not plugged in place. The plugging construction must be performed by divers, however, for large sewage pipelines, because the impact force of water flow is large, the large sewage pipelines do not have the condition of diving at all, so how to ensure the plugging quality of the original pipelines after the large sewage pipelines are changed becomes the primary problem. Taking subway stations in certain city as an example, a sewage pipeline with the diameter of 2400mm exists in the range of a station foundation pit and spans across the foundation pit, the pipeline is a main water inlet pipeline leading to a sewage treatment plant and is responsible for the collection and conveying tasks of sewage at the periphery of 209 square kilometers, the inner diameter of the pipeline is 2400mm, the outer diameter of the pipeline is 2880mm, the pipeline is originally constructed by adopting a pipe jacking method, the pipeline is permanently transferred and wound to the outer side of the foundation pit, the connection and the plugging construction are carried out through a current working well, the daily average flow of the pipeline is about 40 ten thousand m < 3 >/day, the water flow impact force is larger, the current working well does not have diving operation conditions, and effective measures are needed to be taken before plugging to relieve the water flow impact force, so that a diver can safely operate underwater.
Disclosure of Invention
According to the method, the new pipeline and the original pipeline can be well connected, the original pipeline can be plugged, the connection and plugging construction in the process of the transition are completed, the plugging difficult problem of the large sewage pipeline can be well solved, the plugging construction quality is guaranteed, and the construction risk is avoided for later subway construction.
The technical scheme provided by the invention is as follows: the construction method for connecting a new pipe and plugging an original pipe in the transition of a large sewage pipeline is characterized by comprising the following specific steps:
(1) Constructing a new pipe connecting hole communicated with a new pipe adjacent to the existing working well of the original sewage pipe, and sinking a wall of the existing working well to enable the new pipe connecting hole to be communicated with the existing working well after the new pipe is constructed;
(2) The temporary plugging flashboard comprises a grid steel frame and a steel baffle, the lower parts of the grid steel frame and the steel baffle are cut into arc shapes which are the same as the radian of a pipeline, the grid steel frame is vertically inserted into a launder of the existing working well, then the support piece is used for reinforcing and tightly supporting the launder, and then the steel baffle is inserted into the upstream surface for plugging;
(3) After the temporary plugging flashboard is installed, a diver goes into the well to plug the original sewage pipeline at the downstream part of the temporary plugging flashboard by using masonry strip stones;
(4) And after the plug reaches the strength, plugging a gap between the steel grid steel frame and the well wall by adopting a filler, and pouring underwater concrete between the temporary gate valve and the plug after plugging is completed.
The invention further adopts the technical scheme that: the construction steps of the new pipe receiving well in the step (1) are as follows:
a. constructing a new pipe receiving well by adopting an open cut reverse construction method, wherein the new pipe receiving well is a hexagonal reverse well or a quadrilateral square well, the excavation length is 9-11 m, the excavation width is 5.5-7 m, the well wall thickness is 0.5-1 m, and the well depth is the same as the depth of the existing working well; the outer ring of the construction new pipe receiving well is reinforced by adopting double rows of high-pressure jet grouting piles with the diameter of 800mm and the interval of 600mm, the bottom is reinforced by adopting high-pressure jet grouting piles to fill a hall, and the reinforcing depth is at least 2m below the bottom plate;
b. reserving a new pipe and old pipe connection hole when constructing a new pipe receiving well, and reserving a hole door ring beam construction position at the connection hole;
c. after the construction of the new pipe receiving well structure is completed, the existing working well wall at the connection opening of the new pipe and the old pipe is removed in a layering way by adopting a water drill coring way, the thickness of each time of removing is not more than 20cm, a wall body with 20cm is reserved, and after the water drill removing is completed, the well, a launder and a hole ring beam are manufactured in the new pipe receiving well along the launder direction;
d. after the construction of the well, the launder and the opening ring beam is completed, closing the flashboard in the newly built pipeline, starting to inject water into the newly built receiving well, ensuring that the water level is equal to the water level in the original sewage well, and then arranging the diver to use the pneumatic pick to chisel the last remaining 20cm wall of the old well and bricking the launder under water.
The invention further adopts the technical scheme that: the grid steel frame in the step (2) is a steel bar grid bracket which is formed by welding channel steel and has the same shape as that of the steel baffle plate, a plurality of supporting pieces are arranged at the rear side of the grid steel frame, the shape of the upper parts of the grid steel frame and the steel baffle plate is matched with that of the inner cavity of the existing working well, and after the grid steel frame and the steel baffle plate are installed, the edge of the grid steel frame is contacted with the inner wall of the existing working well; the arc-shaped part of the grid steel frame is downwards arranged on one side close to the water outlet of the existing working well, the arc-shaped part of the grid steel frame is fixed on the well wall of the existing working well through a plurality of supporting pieces on the rear side of the arc-shaped part, sliding grooves are respectively welded on two sides of the upstream surface of the grid steel frame, and two sides of the steel baffle are inserted from the upper part of the sliding grooves and fixedly clamped with the grid steel frame through the sliding grooves.
The invention has the preferable technical scheme that: the grid steel frame in the step (2) is formed by welding 40#a channel steel, the supporting piece is H20 section steel, and the steel baffle plate is a thick steel plate with the thickness of 20 mm; and (3) the filling material in the step (3) is cotton wool or a sand bag.
The invention has the preferable technical scheme that: when the wall of the last 20cm of the new pipe and old pipe connecting hole is chiseled, the outline outer ring of the reserved hole is first densely arranged and cored, the radial width is 500mm, the depth is 500mm, the reserved 200mm is reserved, a cast-in-place pipe is constructed after the completion, a water stop adhesive tape is applied between the cast-in-place pipe and the wall of the old well, a grouting pipe is pre-buried, and the grouting is used for preventing sewage leakage; after the cast-in-situ pipe construction is completed, water is injected into the new pipe receiving well, the water level is ensured to be the same as that in the existing working well, and then the diver dives to perform the residual well wall chiseling.
The invention has the preferable technical scheme that: and c, the wall thickness of the well constructed in the step (c) is 0.5m, the clear width is 4m, and the construction is carried out by adopting a sequential construction method.
The invention has the beneficial effects that:
(1) According to the invention, a new pipe receiving well is dug near the original sewage pipeline working well and is communicated with the new pipe, and then the new pipe receiving well is communicated with the working well, so that the original pipe and the new pipe can be quickly and safely connected, and the connection construction effect of the new pipe can be ensured;
(2) The invention firstly connects the original pipe and the new pipe through a new pipe receiving well, introduces the water in the original pipe into the new pipe, reduces the water flow in the original pipe, and is convenient for the later construction;
(3) When the original pipe is plugged, the temporary flashboard is adopted for temporary plugging, so that the impact force of water flow can be reduced, the impact force of water flow on divers and a plugging wall is reduced, the operation risk is reduced, the plugging construction quality is improved, and the construction risk in the process of excavating a deep foundation pit of a subway is further reduced;
(4) The temporary flashboard adopts a mode of combining the grid steel frame and the steel baffle, the lower part of the temporary flashboard is provided with an arc shape which is the same as the radian of a runner of a working well, the temporary flashboard can be accurately inserted into the runner to carry out temporary plugging, and the two parts are separately installed, the grid steel frame is firstly installed, the impact force of flowing water is reduced, the problem that the flashboard is inclined under the impact action of water flow in the installation process is solved, the steel frame can be ensured to be installed at a proper position, and then the steel baffle is further installed to carry out closure plugging;
(5) In the plugging process, the position where the temporary gate is in contact with the launder or the pipe wall is filled with the cotton wool, so that the water seepage quantity can be reduced, and a relatively calm water flow working environment is provided for plugging operation.
Drawings
FIGS. 1 to 4 are flowcharts of construction for transferring a new pipe to original sewage in the invention;
FIGS. 5 and 6 are flowcharts of the original sewer pipe plugging construction of the present invention;
FIG. 7 is a cross-sectional view of FIG. 5;
FIG. 8 is a top view of FIG. 6;
FIG. 9 is a schematic front view of a temporary shutoff gate;
FIG. 10 is a schematic side view of a temporary shutoff gate;
fig. 11 is a schematic view of a structure of a grid steel frame in a temporary plugging shutter.
In the figure: 1-grid steel frame, 2-steel baffle plates, 3-supporting parts, 4-original sewage pipes, 5-existing working wells, 6-cotton wadding filling materials, 7-sliding grooves, 8-new pipe receiving wells, 9-new pipe replacement, 10-bricking plugs, 11-drilling holes, 12-lifting lugs, 13-elder Guan connecting hole lines and 14-well-in-well.
Detailed Description
The invention will be further described with reference to the drawings and examples. The concrete structure of the temporary plugging flashboard in the embodiment of the invention is shown in fig. 9 and 10, and comprises a grid steel frame 1 and a steel baffle plate 2, wherein the steel baffle plate 2 adopts a thick steel plate with the thickness of 20mm, and the lower part of the steel baffle plate 2 is cut into an arc shape with the radian identical to that of the lower part of an original sewage pipe 4; the grid steel frame 1 is a steel grid support which is formed by welding channel steel and has the same shape as that of the steel baffle plate 2, a plurality of supporting pieces 3 are arranged on the rear side of the grid steel frame 1, the grid steel frame 1 adopts 40# a channel steel, and the supporting pieces 3 adopt H20 steel. The spacing between two adjacent transverse and longitudinal groove steels in the grid steel frame 1 is 500mm. The upper parts of the grid steel frame 1 and the steel baffle plate 2 are matched with the inner cavity of the existing working well 5 in shape, and after the grid steel frame is installed, the edges of the grid steel frame and the steel baffle plate are contacted with the inner wall of the existing working well 5. As shown in fig. 11, a chute 7 for fixing the steel baffle plate 2 is welded to each of the two sides of the upstream surface of the grid steel frame 1.
The invention is further described by combining implementation, the embodiment takes the change of a sewage pipeline of a certain subway station as an example, a sewage pipeline with DN2400 at the position of the subway station traverses a foundation pit, and the original pipeline is constructed by adopting a pipe jacking method; the top plate of the subway station has a height of 82.928m and a burial depth of about 4m, the current state D2400 sewage pipe has a height of 78.36m and a burial depth of about 8.6m at the pipe bottom of the crossing part with the subway station; the current situation D2400 sewage pipe collides with the project subway station in elevation, needs to be changed, and is provided with a new pipe according to a planned change route, the new pipe is laid and changed, the joint of the new pipe and the old pipe is changed, and the old pipe is blocked by adopting the method for construction, the concrete steps are as follows:
(1) The new pipe receiving well is constructed beside the existing working well adjacent to the original sewage pipeline, and the concrete construction steps are as follows:
a. as shown in fig. 1, the new pipe receiving well is constructed by adopting an open-cut reverse construction method, the new pipe receiving well is a hexagonal reverse well or a quadrilateral square well, the new pipe receiving well is specifically selected according to the shape of the existing working well, the excavation length of the new pipe receiving well is 9-11 m, the excavation width of the new pipe receiving well is 5.5-7 m, the thickness of a well wall is 0.5-1 m, and the well depth of the new pipe receiving well is the same as the depth of the existing working well; the outer ring of the construction new pipe receiving well is reinforced by adopting double rows of high-pressure jet grouting piles with the diameter of 800mm and the interval of 600mm, the bottom is reinforced by adopting high-pressure jet grouting piles to fill a hall, and the reinforcing depth is at least 2m below the bottom plate; the new pipe is communicated with the new pipe;
b. reserving a new pipe and old pipe connection hole when constructing a new pipe receiving well, and reserving a hole door ring beam construction position at the connection hole;
c. as shown in fig. 2, the existing working well walls at the connection openings of the new pipe and the old pipe are chiseled in a layered manner by adopting a water drill coring mode, the chiseling thickness is not more than 20cm each time, the phenomenon of water leakage is observed in the side wall chiseling process, and finally the wall body is reserved for 20cm (containing single-row steel bars); then as shown in figure 3, a well-in well is constructed in the new pipe receiving well along the direction of the launder, the wall thickness is 0.5m, the clear width is 4m, the well-in well is constructed by adopting a forward construction method, after the construction of the well-in well is finished, the launder and the portal ring beam are started to be constructed, after the ring beam construction is finished, firstly, the outline outer ring of the portal is reserved, the core is densely arranged, the radial width is 500mm, the depth is 500mm, the diameter is reserved for 200mm, a cast-in-place pipe is constructed after the construction is finished, a water stop adhesive tape is constructed between the cast-in-place pipe and the wall of the old well, and a grouting pipe is pre-buried, so that grouting can prevent sewage leakage;
d. after the construction of the well, the launder and the opening ring beam in the well is completed, closing a flashboard in the newly built pipeline, starting to fill water into the newly built receiving well, ensuring that the water level is equal to the water level in the original sewage well, and then arranging a diver to use a pneumatic pick to chisel the last left 20cm wall of the old well and lay the launder under water;
(2) The temporary plugging flashboard is adopted in the existing working well to temporarily plug the original sewage pipe, the temporary plugging flashboard comprises a grid steel frame and a steel baffle plate, the lower parts of the grid steel frame and the steel baffle plate are cut into arc shapes which are the same as the radian of a pipeline, as shown in fig. 5 and 7, the grid steel frame is vertically inserted into a launder of the existing working well, is reinforced and tightly pressed on the wall of the working well through a support piece 3 at the rear side, then the steel baffle plate 2 is inserted into a chute on the upstream surface of the grid steel frame 1 and is fixed, and after the steel baffle plate 2 is installed, in order to reduce the seepage amount, a relatively calm water flow working environment is provided for plugging operation; in order to avoid water seepage, cotton wool or sand bag filling materials can be filled at the joint of the grid steel frame 1 and the steel baffle plate 2 and the pipeline to be plugged;
(3) After the temporary plugging flashboard is installed, a diver goes into the well to plug the original sewage pipeline at the downstream part of the temporary plugging flashboard by using masonry strip stones;
(4) And after the plug reaches the strength, plugging gaps between the steel grid steel frame and the well wall by adopting a filler, pouring underwater concrete between the temporary gate valve and the plug after plugging is completed, wherein schematic diagrams after plugging are shown in fig. 6 and 8.
The embodiment reduces the underwater operation as much as possible, shortens the construction period compared with the original design, ensures the connection quality, adopts a temporary flashboard to temporarily block when the original pipe is blocked, reduces the impact force of water flow on divers and blocking walls, reduces the operation risk and improves the blocking construction quality.
Claims (4)
1. A construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation is characterized by comprising the following specific steps:
(1) Constructing a new pipe connecting hole communicated with a new pipe adjacent to the existing working well of the original sewage pipe, and sinking a wall of the existing working well to enable the new pipe connecting hole to be communicated with the existing working well after the new pipe is constructed;
the construction steps of the new pipe receiving well are as follows:
a. constructing a new pipe receiving well by adopting an open cut reverse construction method, wherein the new pipe receiving well is a hexagonal reverse well or a quadrilateral square well, the excavation length is 9-11 m, the excavation width is 5.5-7 m, the well wall thickness is 0.5-1 m, and the well depth is the same as the depth of the existing working well; the outer ring of the construction new pipe receiving well is reinforced by adopting double rows of high-pressure jet grouting piles with the diameter of 800mm and the interval of 600mm, the bottom is reinforced by adopting high-pressure jet grouting piles to fill a hall, and the reinforcing depth is at least 2m below the bottom plate;
b. reserving a new pipe and old pipe connection hole when constructing a new pipe receiving well, and reserving a hole door ring beam construction position at the connection hole;
c. after the construction of the new pipe receiving well structure is completed, the existing working well wall at the connection hole of the new pipe and the old pipe is removed in a layered way by adopting a water drill coring mode, the thickness of each time of removing is not more than 20cm, a wall body with 20cm is reserved, and then a well in the well, a launder and a hole ring beam are applied in the new pipe receiving well along the launder direction;
d. after the construction of the well, the launder and the opening ring beam in the well is completed, closing a flashboard in the newly built pipeline, starting to fill water into the newly built receiving well, ensuring that the water level is equal to the water level in the original sewage well, and then arranging a diver to use a pneumatic pick to chisel the last left 20cm wall of the old well and lay the launder under water;
(2) Temporary plugging flashboard is adopted in the existing working well to temporarily plug the original sewage pipe, the temporary plugging flashboard comprises a grid steel frame and a steel baffle, the lower parts of the grid steel frame and the steel baffle are cut into arc shapes which are the same as the radian of a pipeline, the grid steel frame is vertically inserted into a launder of the existing working well, then the supporting piece is used for reinforcing and tightly supporting the existing working well in place, and then the steel baffle is inserted into the upstream surface for plugging; the grid steel frame is a steel bar grid bracket which is formed by welding channel steel and has the same shape as the steel baffle plate, a plurality of supporting pieces are arranged at the rear side of the grid steel frame, the shape of the upper parts of the grid steel frame and the steel baffle plate is matched with that of the inner cavity of the existing working well, and after the grid steel frame and the steel baffle plate are installed, the edge of the grid steel frame is contacted with the inner wall of the existing working well; the arc-shaped part of the grid steel frame is downwards arranged at one side close to the water outlet of the existing working well, the arc-shaped part is fixed on the well wall of the existing working well through a plurality of supporting pieces at the rear side of the arc-shaped part, sliding grooves are respectively welded at the two sides of the upstream surface of the grid steel frame, and the two sides of the steel baffle are inserted from the upper part of the sliding grooves and fixedly clamped with the grid steel frame through the sliding grooves;
(3) After the temporary plugging flashboard is installed, a diver goes into the well to plug the original sewage pipeline at the downstream part of the temporary plugging flashboard by using masonry strip stones;
(4) And after the plug reaches the strength, plugging a gap between the steel grid steel frame and the well wall by adopting a filler, and pouring underwater concrete between the temporary gate valve and the plug after plugging is completed.
2. The construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation according to claim 1, wherein the construction method is characterized in that: the grid steel frame in the step (2) is formed by welding 40#a channel steel, the supporting piece is H20 section steel, and the steel baffle plate is a thick steel plate with the thickness of 20 mm; and (3) the filling material in the step (3) is cotton wool or a sand bag.
3. The construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation according to claim 1, wherein the construction method is characterized in that: when the wall of the last 20cm of the new pipe and old pipe connecting hole is chiseled, the outline outer ring of the reserved hole is first cored in a close-packed way, the wall of the well is designed to be 700mm, the wall of the well is taken out to be 500mm, the wall of the well is reserved to be 200mm, a door ring beam is constructed after the completion, a water stop adhesive tape is applied between a cast-in-situ pipe and the wall of the old well, a grouting pipe is pre-buried, and grouting is performed to prevent sewage leakage; after the construction of the portal gird beam is completed, water is injected into the new pipe receiving well, the water level is ensured to be the same as that in the existing working well, and then the diver dives to perform the residual well wall chiseling.
4. The construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation according to claim 1, wherein the construction method is characterized in that: and c, constructing the well in the step c, wherein the wall thickness of the well is 0.5m, the clear width is 4m, and constructing by adopting a sequential construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811180792.XA CN109208737B (en) | 2018-10-09 | 2018-10-09 | Construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811180792.XA CN109208737B (en) | 2018-10-09 | 2018-10-09 | Construction method for new pipe connection and original pipe plugging in large sewage pipeline relocation |
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| CN109208737A CN109208737A (en) | 2019-01-15 |
| CN109208737B true CN109208737B (en) | 2024-02-06 |
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| CN108118770A (en) * | 2017-12-29 | 2018-06-05 | 厦门城联科技有限公司 | A kind of subdrainage channel traffic system |
| CN108222220A (en) * | 2018-01-31 | 2018-06-29 | 杭州市市政工程集团有限公司 | The construction method of new and old sewage pipe connection in a kind of sewage pipe displacement transformation |
| CN209053200U (en) * | 2018-10-09 | 2019-07-02 | 中铁十一局集团城市轨道工程有限公司 | A kind of interim flashboard suitable for the construction of down-stream pipe plugging |
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| CN201003207Y (en) * | 2006-08-16 | 2008-01-09 | 无锡市排水管理处 | Sewer pipe plug device |
| JP2016014290A (en) * | 2014-07-03 | 2016-01-28 | オリエンタル白石株式会社 | Temporary shutoff method of existing underwater structure |
| CN107859145A (en) * | 2017-11-17 | 2018-03-30 | 广州市自来水工程公司 | A kind of drainpipe is plugged into construction method under water |
| CN108118770A (en) * | 2017-12-29 | 2018-06-05 | 厦门城联科技有限公司 | A kind of subdrainage channel traffic system |
| CN108222220A (en) * | 2018-01-31 | 2018-06-29 | 杭州市市政工程集团有限公司 | The construction method of new and old sewage pipe connection in a kind of sewage pipe displacement transformation |
| CN209053200U (en) * | 2018-10-09 | 2019-07-02 | 中铁十一局集团城市轨道工程有限公司 | A kind of interim flashboard suitable for the construction of down-stream pipe plugging |
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