CN107630500A - A kind of water supply and drainage construction method - Google Patents
A kind of water supply and drainage construction method Download PDFInfo
- Publication number
- CN107630500A CN107630500A CN201710889379.XA CN201710889379A CN107630500A CN 107630500 A CN107630500 A CN 107630500A CN 201710889379 A CN201710889379 A CN 201710889379A CN 107630500 A CN107630500 A CN 107630500A
- Authority
- CN
- China
- Prior art keywords
- construction method
- water supply
- groove
- pipeline
- drainage construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of water supply and drainage construction method, it is intended to solves the easy fail in compression of pipeline, its drip irrigation device is:Surveying setting-out:Gash depth and width are calculated according to actual measurement ground elevation, and the fluting sideline of pipeline is released with lime line;Channel excavation:Excavated according to gash depth, soil property and groundwater condition, timely measuring flume bottom elevation and width;Piping support structure is installed:Pouring hole is preset in two artificial side of channel bottom, then pours support stake;Pipe installing:Channel bottom laying basis, then down tube, An Guan, base and interface successively;Trench backfill:Trench backfill order is layered progress by groove drainage direction from high to low, and carries out compactness experiment in time.A kind of water supply and drainage construction method of the present invention has the advantages of improving pipeline compression capability.
Description
Technical field
The present invention relates to building field, more specifically, it relates to a kind of water supply and drainage construction method.
Background technology
Discharge water science and engineering is generally referred to as urban water feed system, drainage system(Municipal plumbing and building
Plumbing), abbreviation plumbing.
Water and Waste Water Engineering research be one of water society's circulation the problem of." feedwater ":One running water modernized
Factory, after extracting Natural Water from rivers and lakes daily, using a series of physical and chemical means by Water warfare to meet production, give birth to
The running water of water quality standard is applied flexibly, then by the city river network to extend in all direction, running water is transported to huge numbers of families." draining ":
One advanced sewage treatment plant of institute, produces us, live used sewage, Wastewater Concentrated, then neat and tidy
It is discharged into rivers and lakes.This water intaking, the process for handling, convey, reprocessing and then discharging are exactly Water and Waste Water Engineering
The main contents to be studied.
But various problems in the work progress of current plumbing be present, and pipeline located underground after the completion of construction holds
Easy fail in compression.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of water supply and drainage construction method, have and carry
The advantages of high pipeline compression capability.
The present invention above-mentioned technical purpose technical scheme is that:A kind of water supply and drainage construction method,
Including:
Surveying setting-out:Gash depth and width are calculated according to actual measurement ground elevation, and the fluting side of pipeline is released with lime line
Line;
Channel excavation:Excavated according to gash depth, soil property and groundwater condition, timely measuring flume bottom elevation and width;
Piping support structure is installed:Pouring hole is manually preset in channel bottom both sides, then pours support stake;
Pipe installing:Channel bottom laying basis, then down tube, An Guan, base and interface successively;
Trench backfill:Trench backfill order is layered progress by groove drainage direction from high to low, and carries out compactness experiment in time.
By using above-mentioned technical proposal, by lime unwrapping wire after measurement, groove is then dug out by machine again, surveyed in time
The elevation and width of bottom land are measured, prevents from backbreaking, it is ensured that channel bottom soil texture is not disturbed or destroys, then in bottom land both sides
Manually default pouring hole, then pours support stake, by Pipe installing in groove, finally drainage direction by groove from high to low
Layering is backfilled, by supporting stake to improve the compression capability of pipeline.
The present invention is further arranged to:Groove both sides side slope in the channel excavation takes 1:0.5 sloping coefficient, side
Not mound in the range of the 1m suitable for reading of slope;Channel bottom retains one layer of 10cm or so and not dug, artificial clear bottom.
By using above-mentioned technical proposal, groove both sides side slope takes 1:0.5 sloping coefficient, increase groove both sides cell wall
Stability, the soil for reducing groove both sides cell wall caves in, and the not mound in the range of side slope 1m suitable for reading, the soil for making to dig out exist
During construction, it will not fall into groove;Channel bottom retains 10cm or so and not digged pit, and by artificial clear bottom, makes bottom land smooth, makes
The groove dug out facilitates postorder to construct.
The present invention is further arranged to:Catch pit, draining are excavated in retention groove bottom without ponding in bottom of trench during the channel excavation
Ditch, the water of catch pit is cleared with water pump.
By using above-mentioned technical proposals, catch pit, gutter are excavated in bottom of trench, is cleared the water of catch pit with water pump,
Channel bottom is not had ponding, improve the stability of groove.
The present invention is further arranged to:The groove avris sets guardrail, and guard rail position sets caution sign, and night hangs
Red light, the spacing of red light are 20m each pairs, while the cover plate covered with bearing capacity on groove.
By using above-mentioned technical proposal, groove avris sets guardrail, and guard rail position sets caution sign, and night suspension is red
Lamp, the spacing of red light are 20m each pairs, while the cover plate covered with bearing capacity on groove, ensure that, at night, pedestrian will not fall
Fall in groove.
The present invention is further arranged to:In the pouring hole interval 2m of channel bottom both sides in the piping support structure installation
Default one, the support stake upper end poured pours cap.
By using above-mentioned technical proposal, pouring hole interval 2m is default one, and support stake is then poured on pouring hole, increases
Add the stability of support stake supporting pipeline.
The present invention is further arranged to:Quality inspection should be carried out to tubing, pipeline is not less than using diameter before the Pipe installing
1000mm pipe of concrete;Sandstone basis is laid, then the unwrapping wire on the basis of sandstone, to control the center line of pipe laying, pipe
Road uses man-machine cooperation down tube;After Pipe installing is good, with clean stone or brickbat by pipe clamp jail, and base is done well in time;Pipeline
Interface smears band interface using cement mortar, and carries out closing water experiment.
By using above-mentioned technical proposal, the unwrapping wire on the basis of sandstone, make pipeline more accurate when laying, and in pipeline
Interface is smeared band by cement mortar and closed, and makes the interface of two pipelines water-tight.
The present invention is further arranged to:The cement mortar smears band interface and uses 1:2 cement mortar smear band, and its width is preferably
200~250mm, thickness are preferably 25~35mm, and 2 layers of steel wire should be added in band, and steel wire should anchor into 100 in concrete foundation~
150 mm。
By using above-mentioned technical proposal, by test, such ratio has more on the basis of structural strength is ensured
Good antiseep effect, and steel wire is anchored into concrete foundation, increase cement mortar smears the structural strength of band.
The present invention is further arranged to:The trench backfill is using artificial backfill, and trench backfill is in base base concrete
Banketed after intensity is up to standard, while tamp groove both sides, to prevent piping displacement.
By using above-mentioned technical proposal, when worker backfills, first wait the intensity of base base concrete up to standard and then
Backfilled, avoid pipeline from moving.
The present invention is further arranged to:At the trench backfill to cap, tamped with frog hammer, then in pipeline two
Supporting layer is covered between the cap of side, sets Fill Reinforced With Geogrids to pour in supporting layer, pours one layer above supporting layer again
Concrete surface layer.
By using above-mentioned technical proposal, when at trench backfill to cap, first tamped with ramming machine, then covered at cap
Lid supporting layer, poured by the Fill Reinforced With Geogrids being embedded in supporting layer, firm supporting construction is formed, then in supporting layer
Upper casting concrete top layer, after being tested by large truck, groove will not collapse, and pipeline is not easy fail in compression.
In summary, the invention has the advantages that:By lime unwrapping wire after measurement, then dug out again by machine
Groove, the elevation and width of bottom land to be measured in time, prevents from backbreaking, it is ensured that channel bottom soil texture is not disturbed or destroys,
Pouring hole is manually preset in bottom land both sides again, support stake is then poured, supporting layer is covered at cap, by being embedded in supporting layer
Fill Reinforced With Geogrids pour, form firm supporting construction, then the casting concrete top layer on supporting layer, makes groove will not
Collapse, and then pipeline is not easy fail in compression.
Embodiment
Example below, the present invention will be described in detail.
A kind of water supply and drainage construction method, successively including surveying setting-out, channel excavation, piping support structure installation, pipeline peace
It is filled with and pipeline backfills.
Surveying setting-out:Gash depth and width are calculated according to actual measurement ground elevation, and opening for pipeline is released with lime line
Trough rim line;Channel excavation:Excavated according to gash depth, soil property and groundwater condition, timely measuring flume bottom elevation and width;
Piping support structure is installed:Pouring hole is manually preset in channel bottom both sides, then pours support stake;Pipe installing:Trench bottom
Portion laying basis, then down tube, An Guan, base and interface successively;Trench backfill:Trench backfill order by groove drainage direction by
It is high to be carried out to low layering, and compactness experiment is carried out in time, by lime unwrapping wire after measurement, ditch is then dug out by machine again
Groove, the elevation and width of bottom land to be measured in time, prevents from backbreaking, it is ensured that channel bottom soil texture is not disturbed or destroys, then
Bottom land both sides manually preset pouring hole, then pour support stake, by Pipe installing in groove, finally by groove draining side
Backfilled to layering from high to low, by supporting stake to improve the compression capability of pipeline.
Groove both sides side slope in channel excavation takes 1:0.5 sloping coefficient, not mound in the range of side slope 1m suitable for reading;Ditch
Trench bottom retains one layer of 10cm or so and not dug, and artificial clear bottom, groove both sides side slope takes 1:0.5 sloping coefficient, increase groove
The stability of both sides cell wall, the soil for reducing groove both sides cell wall caves in, and the not mound in the range of side slope 1m suitable for reading, makes to dig out
Soil construction when, will not fall into groove;Channel bottom retains 10cm or so and not digged pit, and by artificial clear bottom, makes groove
Bottom is smooth, and the groove for making to dig out facilitates postorder to construct.
Retention groove bottom excavates catch pit, gutter in bottom of trench, is arranged the water of catch pit with water pump without ponding during channel excavation
Clearly, catch pit, gutter are excavated in bottom of trench, is cleared the water of catch pit with water pump, channel bottom is not had ponding, improve groove
Stability.
Groove avris sets guardrail, and guard rail position sets caution sign, and night suspension red light, the spacing of red light are every for 20m
It is right, while the cover plate covered with bearing capacity on groove, groove avris set guardrail, guard rail position sets caution sign, and night
Hang red light, the spacing of red light is 20m each pairs, while the cover plate covered with bearing capacity on groove, is ensured at night, pedestrian
Do not fall out in groove.
Pouring hole interval 2m in piping support structure installation in channel bottom both sides is default one, in the support stake poured
End pours cap, and pouring hole interval 2m is default one, and support stake is then poured on pouring hole, increase support stake supporting pipeline
Stability.
Quality inspection should be carried out before Pipe installing to tubing, pipeline is not less than 1000mm pipe of concrete using diameter;Lay sand
Stone foundation, the then unwrapping wire on the basis of sandstone, to control the center line of pipe laying, pipeline uses man-machine cooperation down tube;Pipeline
After installing, with clean stone or brickbat by pipe clamp jail, and base is done well in time;Pipe joint is smeared band using cement mortar and connect
Mouthful, and carry out closing water experiment, the unwrapping wire on the basis of sandstone, make pipeline more accurate when laying, and pass through at pipe joint
Cement mortar is smeared band and closed, and makes the interface of two pipelines water-tight.
Cement mortar smears band interface and uses 1:2 cement mortar smear band, and it is preferably 200~250mm that its is wide, and thickness is preferably 25~
35mm, 2 layers of steel wire should be added with, steel wire should anchor into 100~150 mm in concrete foundation, such by test
Ratio has more preferable antiseep effect on the basis of structural strength is ensured, and steel wire is anchored into concrete foundation, increases
Cement mortar is added to smear the structural strength of band.
Trench backfill is banketed using artificial backfill, trench backfill after base base concrete intensity is up to standard, simultaneously
Groove both sides are tamped, to prevent piping displacement, when worker backfills, first waits the intensity of base base concrete up to standard and then enters
Row backfill, avoids pipeline from moving.
At trench backfill to cap, tamped with frog hammer, support is then covered between the cap of pipeline both sides
Layer, set Fill Reinforced With Geogrids to pour in supporting layer, pour a layer concrete top layer, trench backfill to cap above supporting layer again
When at beam, first tamped with ramming machine, supporting layer is then covered at cap, passes through the Fill Reinforced With Geogrids being embedded in supporting layer
Pour, form firm supporting construction, then the casting concrete top layer on supporting layer, after being tested by large truck, groove
It will not collapse, pipeline is not easy fail in compression.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
- A kind of 1. water supply and drainage construction method, it is characterised in that including:Surveying setting-out:Gash depth and width are calculated according to actual measurement ground elevation, and the fluting side of pipeline is released with lime line Line;Channel excavation:Excavated according to gash depth, soil property and groundwater condition, timely measuring flume bottom elevation and width;Piping support structure is installed:Pouring hole is preset in two artificial side of channel bottom, then pours support stake;Pipe installing:Channel bottom laying basis, then down tube, An Guan, base and interface successively;Trench backfill:Trench backfill order is layered progress by groove drainage direction from high to low, and carries out compactness experiment in time.
- A kind of 2. water supply and drainage construction method according to claim 1, it is characterised in that:Groove two in the channel excavation Take 1 in side slope:0.5 sloping coefficient, not mound in the range of side slope 1m suitable for reading;Channel bottom retains one layer of 10cm or so not Dig, artificial clear bottom.
- A kind of 3. water supply and drainage construction method according to claim 2, it is characterised in that:Retention groove bottom during the channel excavation Without ponding, catch pit, gutter are excavated in bottom of trench, is cleared the water of catch pit with water pump.
- A kind of 4. water supply and drainage construction method according to claim 2, it is characterised in that:The groove avris sets guardrail, Guard rail position sets caution sign, and night suspension red light, and the spacing of red light is 20m each pairs, while covered with carrying on groove The cover plate of power.
- A kind of 5. water supply and drainage construction method according to claim 1, it is characterised in that:In the piping support structure installation Pouring hole interval 2m in channel bottom both sides presets one, and the support stake upper end poured pours cap.
- A kind of 6. water supply and drainage construction method according to claim 1, it is characterised in that:Tubing is tackled before the Pipe installing Quality inspection is carried out, pipeline is not less than 1000mm pipe of concrete using diameter;Sandstone basis is laid, is then put on the basis of sandstone Line, to control the center line of pipe laying, pipeline uses man-machine cooperation down tube;After Pipe installing is good, with clean stone or brickbat By pipe clamp jail, and do base well in time;Pipe joint smears band interface using cement mortar, and carries out closing water experiment.
- A kind of 7. water supply and drainage construction method according to claim 6, it is characterised in that:The cement mortar smears band interface Using 1:2 cement mortar smear band, and it is preferably 200~250mm that its is wide, and thickness is preferably 25~35mm, and 2 layers of steel wire should be added in band, Steel wire should anchor into 100~150 mm in concrete foundation.
- A kind of 8. water supply and drainage construction method according to claim 6, it is characterised in that:The trench backfill is returned using artificial Fill out, trench backfill is banketed after base base concrete intensity is up to standard, while tamps groove both sides, to prevent piping displacement.
- A kind of 9. water supply and drainage construction method according to claim 5, it is characterised in that:The trench backfill is to cap Place, with frog hammer compaction in layers, then covers supporting layer between the cap of pipeline both sides, and soil is set in supporting layer Work grid reinforced pouring, a layer concrete top layer is poured again above supporting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889379.XA CN107630500A (en) | 2017-09-27 | 2017-09-27 | A kind of water supply and drainage construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889379.XA CN107630500A (en) | 2017-09-27 | 2017-09-27 | A kind of water supply and drainage construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107630500A true CN107630500A (en) | 2018-01-26 |
Family
ID=61102823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710889379.XA Pending CN107630500A (en) | 2017-09-27 | 2017-09-27 | A kind of water supply and drainage construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107630500A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457357A (en) * | 2018-02-13 | 2018-08-28 | 中建六局土木工程有限公司 | A kind of current-formed silt soil layer pipeline construction method |
| CN108570998A (en) * | 2018-05-16 | 2018-09-25 | 中交第二航务工程局有限公司 | The construction method of lowering of watertable during a kind of subgrade construction |
| CN109811863A (en) * | 2019-03-19 | 2019-05-28 | 广州盈德建筑工程有限公司 | A kind of water supply and drainage construction method |
| CN111075992A (en) * | 2020-01-03 | 2020-04-28 | 青岛华德仪表工程有限公司 | Water supply pipeline construction method |
| CN111155623A (en) * | 2019-12-10 | 2020-05-15 | 宣城市政建设集团有限公司 | Construction and installation method for outdoor square stainless steel and plastic finished product combined drainage ditch |
| CN111593780A (en) * | 2020-04-30 | 2020-08-28 | 南京满能建设工程技术有限公司 | Construction method for laying communication pipeline |
| CN114606932A (en) * | 2022-03-11 | 2022-06-10 | 东珠生态环保股份有限公司 | Soft clay foundation treatment method suitable for municipal road pipeline laying |
| CN116104173A (en) * | 2021-11-11 | 2023-05-12 | 南京绿盛通风设备有限公司 | Method for installing pipeline of outdoor water supply and drainage system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565964A (en) * | 2009-05-25 | 2009-10-28 | 青岛恒生源集团建设有限公司 | Construction method for mounting outdoor embedded high-density polyethylene double-wall corrugated drain pipe |
| CN102877538A (en) * | 2012-10-22 | 2013-01-16 | 济南城建集团有限公司 | Construction method for fixing HDPE (high-density polypropylene) pipe by embedding iron wires |
| CN103670448A (en) * | 2014-01-02 | 2014-03-26 | 中铁三局集团有限公司 | Underground pipeline protection device and support method applying underground pipeline protection device |
| CN103982707A (en) * | 2014-02-27 | 2014-08-13 | 罗晓晖 | Laying-in-site concrete-enveloped flexible pipe diversion system |
| CN104120731A (en) * | 2014-07-24 | 2014-10-29 | 黄俊文 | Tunnel settlement protecting device and construction method thereof |
| CN104895174A (en) * | 2015-06-02 | 2015-09-09 | 杭州江润科技有限公司 | Construction method of large-diameter rain sewage pipeline assembling type component structure |
| CN106978843A (en) * | 2017-04-25 | 2017-07-25 | 杭州之江市政建设有限公司 | Municipal drainage pipeline construction technology |
-
2017
- 2017-09-27 CN CN201710889379.XA patent/CN107630500A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565964A (en) * | 2009-05-25 | 2009-10-28 | 青岛恒生源集团建设有限公司 | Construction method for mounting outdoor embedded high-density polyethylene double-wall corrugated drain pipe |
| CN102877538A (en) * | 2012-10-22 | 2013-01-16 | 济南城建集团有限公司 | Construction method for fixing HDPE (high-density polypropylene) pipe by embedding iron wires |
| CN103670448A (en) * | 2014-01-02 | 2014-03-26 | 中铁三局集团有限公司 | Underground pipeline protection device and support method applying underground pipeline protection device |
| CN103982707A (en) * | 2014-02-27 | 2014-08-13 | 罗晓晖 | Laying-in-site concrete-enveloped flexible pipe diversion system |
| CN104120731A (en) * | 2014-07-24 | 2014-10-29 | 黄俊文 | Tunnel settlement protecting device and construction method thereof |
| CN104895174A (en) * | 2015-06-02 | 2015-09-09 | 杭州江润科技有限公司 | Construction method of large-diameter rain sewage pipeline assembling type component structure |
| CN106978843A (en) * | 2017-04-25 | 2017-07-25 | 杭州之江市政建设有限公司 | Municipal drainage pipeline construction technology |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457357A (en) * | 2018-02-13 | 2018-08-28 | 中建六局土木工程有限公司 | A kind of current-formed silt soil layer pipeline construction method |
| CN108570998A (en) * | 2018-05-16 | 2018-09-25 | 中交第二航务工程局有限公司 | The construction method of lowering of watertable during a kind of subgrade construction |
| CN109811863A (en) * | 2019-03-19 | 2019-05-28 | 广州盈德建筑工程有限公司 | A kind of water supply and drainage construction method |
| CN111155623A (en) * | 2019-12-10 | 2020-05-15 | 宣城市政建设集团有限公司 | Construction and installation method for outdoor square stainless steel and plastic finished product combined drainage ditch |
| CN111075992A (en) * | 2020-01-03 | 2020-04-28 | 青岛华德仪表工程有限公司 | Water supply pipeline construction method |
| CN111075992B (en) * | 2020-01-03 | 2021-12-17 | 青岛华德仪表工程有限公司 | Water supply pipeline construction method |
| CN111593780A (en) * | 2020-04-30 | 2020-08-28 | 南京满能建设工程技术有限公司 | Construction method for laying communication pipeline |
| CN116104173A (en) * | 2021-11-11 | 2023-05-12 | 南京绿盛通风设备有限公司 | Method for installing pipeline of outdoor water supply and drainage system |
| CN114606932A (en) * | 2022-03-11 | 2022-06-10 | 东珠生态环保股份有限公司 | Soft clay foundation treatment method suitable for municipal road pipeline laying |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107630500A (en) | A kind of water supply and drainage construction method | |
| CN110306616B (en) | Construction method of sewage pipeline | |
| CN107938692B (en) | Drainage and recharge construction method and structure | |
| CN100412275C (en) | Waterproof and plugging construction method for precipitation well in foundation pit | |
| CN203603105U (en) | Wall plate type ecological retaining wall bank protection structure | |
| CN107587557A (en) | Outdoor water engineering construction method | |
| CN113774917B (en) | Safe construction method for earth and rockfill excavation and side slope supporting engineering | |
| CN207512745U (en) | A kind of caisson device and its foundation pit structure | |
| CN106192665B (en) | A kind of sponge urban road rain infiltration system and its construction method | |
| CN101597888B (en) | Construction method of municipal drainage culvert sinking trough | |
| CN104762982A (en) | Construction method of watery red sandstone geological underground water level control | |
| CN215105880U (en) | Concrete inverted well suitable for connecting new and old water supply and drainage pipelines | |
| CN112900583A (en) | Spatial intersection construction method for rainwater and sewage pipe positions at same elevation | |
| CN210013227U (en) | Drainage device capable of effectively reducing anti-floating design water level of basement | |
| CN111963214A (en) | Tunnel molding waterproof construction process | |
| CN207633496U (en) | Integrated rainwater recycling system for sponge cities in super-large square | |
| CN113089681B (en) | Waterproof invasion structure of deep foundation pit base concrete cushion layer and construction method | |
| CN110512594A (en) | The simple and easy method of churning driven opportunity cavity pore-forming | |
| CN113700111A (en) | Construction method of rainwater permeation, drainage and reuse integrated system | |
| CN113374055A (en) | Construction method of buried reinforced HDPE (high-density polyethylene) spiral corrugated pipe | |
| CN104088352A (en) | Ground rainwater comprehensive utilization structure | |
| CN207828994U (en) | It is a kind of draining and recharge constructing structure | |
| CN110939150A (en) | Emergency rescue method for rapidly constructing large-hydraulic-slope-drop-ratio thin-wall structure in confined water inrush accident state | |
| CN216552030U (en) | Basement outer wall fat groove falls drainage structures | |
| CN204491797U (en) | A kind of sports ground dmp filter stacking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180126 |