CN106948832A - A kind of tunnel in cold regions heat-insulating water outlet construction method - Google Patents
A kind of tunnel in cold regions heat-insulating water outlet construction method Download PDFInfo
- Publication number
- CN106948832A CN106948832A CN201710149844.6A CN201710149844A CN106948832A CN 106948832 A CN106948832 A CN 106948832A CN 201710149844 A CN201710149844 A CN 201710149844A CN 106948832 A CN106948832 A CN 106948832A
- Authority
- CN
- China
- Prior art keywords
- construction method
- backfill
- rubble
- water outlet
- direct
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 239000004575 stone Substances 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 230000008595 infiltration Effects 0.000 claims abstract description 11
- 238000001764 infiltration Methods 0.000 claims abstract description 11
- 238000009412 basement excavation Methods 0.000 claims abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000013316 zoning Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 238000011065 in-situ storage Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000007726 management method Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention belongs to technical field of tunnel construction, it is related to a kind of tunnel in cold regions heat-insulating water outlet construction method.Including step 1 addressing；Step 2 excavation pit；Step 3 sets filter well；Step 4 backfills fertile groove；Being seeped water described in step 5, well conduit is interior to be backfilled；Backfilled described in step 6 around fertile groove；Secondary backfill rubble in infiltration well conduit described in step 7；Step 8 sets dash along；Step 9 sets insulation direct-buried pipe；Backfill stone above step 10 direct-buried pipe；Step 11 performs clitter and builds circle packet header formula delivery port.Beneficial effects of the present invention are：Water outlet frost is avoided to block delivery port；The secondary storage of water resource is realized, the wasting of resources is reduced；Low cost, saves human and material resources and financial resources；Short time limit, is easy to operation management and maintenance.
Description
Technical field
The invention belongs to technical field of tunnel construction, it is related to a kind of tunnel in cold regions heat-insulating water outlet construction method.
Background technology
At present, positioned at outside the hole of severe cold area outside seepage ditch, cold-proof drain cavern and hole covered conduit delivery port.Point headwall formula and
Bury insulation two kinds of packet header formula of circle.The former locates more suddenly suitable for landform, and the latter is applied to landform flat place.Positioned at severe cold area
Tunnel using the bright water discharge of covered conduit, is influenceed by discharge distance and delivery port selection position, discharge outlet frozen block usually occurs,
The phenomenons such as gutter frozen block.Safeguard that unit ensures that draining is unobstructed and handled, it is necessary to put into substantial amounts of manpower and materials, add fortune
Seek the difficulty and maintenance cost of management.
Chinese Application No. CN201410395898.7 patent of invention discloses a kind of tunnel in cold area hole external thermal insulation water outlet
The construction method of mouth, considers that delivery port is layered the mode of draining, after drain pipe port first layer freezes, water passes through rear first
Slabstone water storehouse raises water level, then is discharged by upper strata drainpipe, and after the upper strata mouth of pipe freezes, water body itself has certain temperature
Degree, which slowly will melt the drain pipe port of bottom, to be dredged, and water will not be frozen in the case of constant flow, and gone out
The mouth of a river aids in Insulation using various such as asbestos, cinder, should not freeze in the water of slope protection scope, a delivery port very little
In the range of crop out, be enough to ensure that the mouth of pipe is not frozen by the temperature of water body itself, separately drainpipe lower section set electricity
Heating tape, once running into extreme climate, can take electrically heated Insulation, so that it is guaranteed that the heat insulation effect of delivery port.
The invention solves the problems, such as the insulation of tunnel in cold area delivery port to a certain extent, but in extremely frigid zones effect not
Be it is obvious that moreover, quantities is larger, need to put into substantial amounts of human and material resources and financial resources during construction, cost is higher, the duration compared with
Long, the difficulty and maintenance cost of operation management are higher.
The content of the invention
The purpose of the present invention is to pass through increase filter well, winter below gutter there is provided one kind in view of the shortcomings of the prior art
The season not outside draining of severe cold area water outlet, it is to avoid water outlet frost blocks delivery port, by increasing capacitance it is possible to increase groundwater reclaim
Rate, simple and effective heat-insulating water outlet construction method.
The technical scheme of the present invention solved the problems, such as is related to a kind of tunnel in cold regions heat-insulating water outlet construction method, including:
Step 1 addressing, geological analysis, with reference to designed lines geologic information, test pit collection soil sample is dug at scene, determines Portal Section
Possess the stratum of subdrainage condition, and the setting number for calculating filter well at heat-insulating water outlet is measured according to rainfall and tunnel drainage
Amount；
Step 2 excavation pit, according to design, foundation ditch, the ground of the foundation ditch are excavated setting at the filter well
Near coal-mine area be 4~6m of diameter, depth be 3~5m；
Step 3 sets the filter well, and the infiltration well conduit point more piece is put into the foundation ditch vertically；
Step 4 backfills fertile groove, often puts the section infiltration well conduit, the primary backfill rubble in the fertile groove of surrounding,
Until the filter well Pipe installing is completed；
Being seeped water described in step 5, well conduit is interior to be backfilled, and rubble is backfilled inside the infiltration well conduit；
Backfill, centered on the filter well center, returned in the radius of 1.5~5m scopes around fertile groove described in step 6
Fill out gravel soil；
Secondary backfill rubble in infiltration well conduit described in step 7；
Step 8 sets dash along, and the dash along, surrounding earth filling tamping are set in the delivery port of the filter well；
Step 9 sets insulation direct-buried pipe, while performing the reserved pvc pipe secondary drainage mouthful of insulation；
Backfill slag above backfill stone above step 10 direct-buried pipe, secondary delivery port, manual zoning's compacting；
Step 11 performs clitter and builds circle packet header formula delivery port, performs mortar rubble masonry pavement, and bank protection peripheral hardware bilayer isolation oil is stained with.
Further, the depth of the filter well is 4m, and sectional dimension is 1.5m × 1.0m.
Further, the depth of the foundation ditch of the step 1 is 4m, the near coal-mine a diameter of 5m in ground.
Further, the infiltration well conduit of the step 3 is concrete duct.
Further, the rubble of the primary backfill of the step 4 is about a diameter of 2~4cm rubble.
Further, the radius of the backfill gravel soil of the step 6 is 2.5m.
Further, the secondary backfill rubble of the step 7 is for filling the gap of the primary backfill rubble
Within small crushed stone, a diameter of 5mm.
Further, a diameter of φ 800 of the direct-buried pipe of the step 9.
Further, the step 11 performs the step of clitter builds circle packet header formula delivery port, including：
Step 11.1 is in direct-buried pipe position end according to draining tendency slope than brush slope；
Step 11.2 is performing mortar flag stone substrate；
Step 11.3 sets PVC drain pipe at native stone to the direct-burried mouth of pipe ttom of pipe in backfill part；
Step 11.4 backfills slag, and layering rammer is filled out；
Step 11.5 uses M20 mortars, stone masonry mask；
Step 11.6 lays double-deck malthoid.
Beneficial effects of the present invention are：
1. avoid water outlet frost from blocking delivery port；
2. realizing the secondary storage of water resource, the wasting of resources is reduced；
3. low cost, saves human and material resources and financial resources；
4. short time limit, is easy to operation management and maintenance.
Brief description of the drawings
Fig. 1 is construction flow chart of the present invention.
Fig. 2 is heat-insulating water outlet construction sectional drawing of the present invention.
In figure：1- gravel soils, 2- filter wells, 3 rubbles, the pre-buried pvc pipes of 4-；5- stone masonry masks；6- bilayer malthoids, 7- is former
Ground, 8- rams banket stone, 9- mortar flag stone substrates, 10- direct-buried pipes.
The construction method, including：
Step 1 addressing, geological analysis, with reference to designed lines geologic information, test pit collection soil sample is dug at scene, determines Portal Section
Possess the stratum of subdrainage condition, and measured according to local rainfall and tunnel drainage and to calculate setting for filter well 2 at heat-insulating water outlet
Put quantity；
Step 2 excavation pit, according to design, foundation ditch, the ground of the foundation ditch are excavated setting at the filter well 2
Near coal-mine area be 4~6m of diameter, depth be 3~5m；
Step 3 sets the filter well 2, and the pipeline point more piece of filter well 2 is put into the foundation ditch vertically；
Step 4 backfills fertile groove, often puts the section pipeline of filter well 2, the primary backfill rubble in the fertile groove of surrounding,
Until the Pipe installing of filter well 2 is completed；
Backfilled in the pipeline of filter well 2 described in step 5, rubble 3 is backfilled inside the pipeline of filter well 2；
Backfill, centered on the center of filter well 2, returned in the radius of 1.5~5m scopes around fertile groove described in step 6
Fill out gravel soil 1；
Secondary backfill rubble in the pipeline of filter well 2 described in step 7；
Step 8 sets dash along, and the dash along, surrounding earth filling tamping are set in the delivery port of the filter well 2；
Step 9 sets insulation direct-buried pipe, while performing the reserved secondary drainage of pvc pipe 4 mouthful of insulation；
Backfill slag above backfill stone 8 above step 10 direct-buried pipe, secondary delivery port, manual zoning's compacting；
Step 11 performs mortar rubble masonry pavement, and bank protection peripheral hardware bilayer isolation oil is stained with.
Further, the depth of the filter well 2 is 4m, and sectional dimension is 1.5m × 1.0m.
Further, the depth of the foundation ditch of the step 1 is 4m, the near coal-mine a diameter of 5m in ground.
Further, the pipeline of the filter well 2 of the step 3 is concrete duct.
Further, the rubble 4 of the primary backfill of the step 4 is a diameter of 2~4cm rubble.
Further, the radius of the backfill gravel soil 1 of the step 6 is 2.5m.
Further, the secondary backfill rubble of the step 7 is for filling the gap of the primary backfill rubble
Within small crushed stone, a diameter of 5mm.
Further, a diameter of φ 800 of the direct-buried pipe of the step 9.
Further, the step 11 performs the step of clitter builds circle packet header formula delivery port, including：
Step 11.1 is in direct-buried pipe position end according to draining tendency slope than brush slope；
Step 11.2 is performing mortar flag stone substrate 9；
Step 11.3 sets PVC drain pipe 4 at native stone to the direct-burried mouth of pipe ttom of pipe in backfill part；
Step 11.4 backfills slag, and layering rammer is filled out；
Step 11.5 uses M20 mortars, stone masonry mask 5；
Step 11.6 lays double-deck malthoid 6.
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from substance of the present invention, art technology
Any deformation that personnel are contemplated that, improvement, replace and each fall within protection scope of the present invention.
Claims (9)
1. a kind of tunnel in cold regions heat-insulating water outlet construction method, including,
Step 1 addressing, geological analysis, with reference to designed lines geologic information, test pit collection soil sample is dug at scene, determines that Portal Section possesses
The stratum of subdrainage condition, and filter well setting quantity at calculation heat-insulating water outlet is measured according to local rainfall and tunnel drainage；
Step 2 excavation pit, according to design, foundation ditch, the near coal-mine face on the ground of the foundation ditch are excavated setting at filter well
Product is 4~6m of diameter, and depth is 3~5m；
Step 3 sets filter well, and infiltration well conduit point more piece is put into the foundation ditch vertically；
Step 4 backfills fertile groove, often puts the section infiltration well conduit, the primary backfill rubble in the fertile groove of surrounding, until
The filter well Pipe installing is completed；
Being seeped water described in step 5, well conduit is interior to be backfilled, and rubble is backfilled inside the infiltration well conduit；
Backfilled described in step 6 around fertile groove, centered on the filter well center, the Cast-in-situ Piles in Sand-filling in the radius of 1.5~5m scopes
Gravel soil；
Secondary backfill rubble in infiltration well conduit described in step 7；
Step 8 sets dash along, and the dash along, surrounding earth filling tamping are set in the delivery port of the filter well；
Step 9 sets insulation direct-buried pipe, while performing the reserved pvc pipe secondary drainage mouthful of insulation；
Backfill slag above backfill stone above step 10 direct-buried pipe, secondary delivery port, manual zoning's compacting；
Step 11 performs clitter and builds circle packet header formula delivery port, performs mortar rubble masonry pavement, and bank protection peripheral hardware bilayer isolation oil is stained with.
2. construction method according to claim 1, it is characterised in that the depth of the filter well is 4m, sectional dimension is
1.5m×1.0m。
3. construction method according to claim 1, it is characterised in that the depth of the foundation ditch of the step 1 is 4m, ground
The near coal-mine a diameter of 5m in face.
4. construction method according to claim 1, it is characterised in that the infiltration well conduit of the step 3 is coagulation
Native pipeline.
5. construction method according to claim 1, it is characterised in that the rubble of the primary backfill of the step 4 is
About a diameter of 2~4cm rubble.
6. construction method according to claim 1, it is characterised in that the radius of the backfill gravel soil of the step 6
Scope is 2.5m.
7. construction method according to claim 1, it is characterised in that the secondary backfill rubble of the step 7 is for filling out
Fill within the small crushed stone in the gap of the primary backfill rubble, a diameter of 5mm.
8. construction method according to claim 1, it is characterised in that a diameter of φ of the direct-buried pipe of the step 9
800。
9. construction method according to claim 1, it is characterised in that the step 11 performs clitter and builds circle packet header formula water outlet
The step of mouth, including：
Step 11.1 is in direct-buried pipe position end according to draining tendency slope than brush slope；
Step 11.2 is performing mortar flag stone substrate；
Step 11.3 sets PVC drain pipe at native stone to the direct-burried mouth of pipe ttom of pipe in backfill part；
Step 11.4 backfills slag, and layering rammer is filled out；
Step 11.5 uses M20 mortars, stone masonry mask；
Step 11.6 lays double-deck malthoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710149844.6A CN106948832B (en) | 2017-03-14 | 2017-03-14 | A kind of tunnel in cold regions heat-insulating water outlet construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710149844.6A CN106948832B (en) | 2017-03-14 | 2017-03-14 | A kind of tunnel in cold regions heat-insulating water outlet construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106948832A true CN106948832A (en) | 2017-07-14 |
| CN106948832B CN106948832B (en) | 2019-03-29 |
Family
ID=59467050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710149844.6A Expired - Fee Related CN106948832B (en) | 2017-03-14 | 2017-03-14 | A kind of tunnel in cold regions heat-insulating water outlet construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106948832B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404011A (en) * | 2018-09-10 | 2019-03-01 | 北京隧盾市政建设有限公司 | A kind of heat insulating construction method of pipe curtain slip casting tunnel water outlet |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148885A (en) * | 2007-11-07 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Stereo drainage system structure for landfill underground water |
| JP4250050B2 (en) * | 2003-10-03 | 2009-04-08 | 前田建設工業株式会社 | Tunnel construction method |
| CN101649592A (en) * | 2009-09-07 | 2010-02-17 | 北京仁创科技集团有限公司 | Road drainage system |
| CN203594039U (en) * | 2013-12-05 | 2014-05-14 | 铁道第三勘察设计院集团有限公司 | Underground water cut slope heat preservation protection structure |
| CN104179513A (en) * | 2014-08-13 | 2014-12-03 | 中铁隧道集团二处有限公司 | Construction method for thermal insulation water outlet outside cold-region tunnel |
| CN204325845U (en) * | 2014-12-05 | 2015-05-13 | 中交第一公路勘察设计研究院有限公司 | The earth shoulder blind-drainage system of a kind of road surface edge central drainage |
| CN204386651U (en) * | 2015-01-05 | 2015-06-10 | 中国电建集团成都勘测设计研究院有限公司 | Layers In Cold-area Tunnels heat-insulating water outlet structure |
| CN105887606A (en) * | 2016-05-20 | 2016-08-24 | 杭州江润科技有限公司 | Heat-preservation and water-seepage compound type blind ditch of deep trench of severely cold and frozen earth area and construction method of heat-preservation and water-seepage compound type blind ditch |
| KR20170007975A (en) * | 2015-07-13 | 2017-01-23 | (주)나우기술 | The Construction Method and Structure of linear curve-shaped non-excavation tunnel with using Forepoling Board and ground reinforcement |
-
2017
- 2017-03-14 CN CN201710149844.6A patent/CN106948832B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4250050B2 (en) * | 2003-10-03 | 2009-04-08 | 前田建設工業株式会社 | Tunnel construction method |
| CN101148885A (en) * | 2007-11-07 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Stereo drainage system structure for landfill underground water |
| CN101649592A (en) * | 2009-09-07 | 2010-02-17 | 北京仁创科技集团有限公司 | Road drainage system |
| CN203594039U (en) * | 2013-12-05 | 2014-05-14 | 铁道第三勘察设计院集团有限公司 | Underground water cut slope heat preservation protection structure |
| CN104179513A (en) * | 2014-08-13 | 2014-12-03 | 中铁隧道集团二处有限公司 | Construction method for thermal insulation water outlet outside cold-region tunnel |
| CN204325845U (en) * | 2014-12-05 | 2015-05-13 | 中交第一公路勘察设计研究院有限公司 | The earth shoulder blind-drainage system of a kind of road surface edge central drainage |
| CN204386651U (en) * | 2015-01-05 | 2015-06-10 | 中国电建集团成都勘测设计研究院有限公司 | Layers In Cold-area Tunnels heat-insulating water outlet structure |
| KR20170007975A (en) * | 2015-07-13 | 2017-01-23 | (주)나우기술 | The Construction Method and Structure of linear curve-shaped non-excavation tunnel with using Forepoling Board and ground reinforcement |
| CN105887606A (en) * | 2016-05-20 | 2016-08-24 | 杭州江润科技有限公司 | Heat-preservation and water-seepage compound type blind ditch of deep trench of severely cold and frozen earth area and construction method of heat-preservation and water-seepage compound type blind ditch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404011A (en) * | 2018-09-10 | 2019-03-01 | 北京隧盾市政建设有限公司 | A kind of heat insulating construction method of pipe curtain slip casting tunnel water outlet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106948832B (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104131575B (en) | A kind of karst height grows the leak stopping water discharge method of the stratum dam foundation | |
| CN107587557A (en) | Outdoor water engineering construction method | |
| CN105569058A (en) | Expansive soil cutting structure and construction method thereof | |
| CN105179011B (en) | A kind of tunnel closure facility and its method for blocking | |
| CN105887606B (en) | Alpine meadow region heavy cut insulation infiltration combined type underdrain and its construction method | |
| CN105401589B (en) | A kind of GPS for frozen soil and swelled ground area monitors pier and its construction technology | |
| CN203741666U (en) | Roadbed structure for preventing cut-fill section of highway in cold region from frost boiling | |
| CN109236367A (en) | A kind of tunnel structure and its frozen construction method with antiseepage drain function | |
| CN101021068A (en) | Low-level prepressing drainage dynamic consolidating soft soil foundation processing method | |
| CN107152012A (en) | Sluice construction technique | |
| CN208982109U (en) | A kind of tunnel structure with antiseepage drain function | |
| CN107034900B (en) | Structure is administered to frozen soil side slope disease of slumping of hot melt | |
| CN107117883A (en) | It is a kind of first intercept water after permeable paving brick and preparation method thereof | |
| CN102877543B (en) | Heat-preservation blind trench facility applicable to multi-year permafrost region and construction method | |
| CN202850011U (en) | Thermal insulation blind ditch facility suitable for permafrost regions | |
| CN106948832B (en) | A kind of tunnel in cold regions heat-insulating water outlet construction method | |
| CN205775687U (en) | Alpine meadow region heavy cut insulation infiltration combined type covered conduit | |
| CN109024645A (en) | Integrated water-stop curtain, sponge city water cycle system and method | |
| CN206204970U (en) | A kind of high fill foundation weeper drain | |
| CN206477347U (en) | The water storage structure of basement | |
| CN108755724A (en) | The external water drainage waterproof method of pipe gallery | |
| CN102587399B (en) | Salivary flow ice prevention and management structure in cold zone | |
| CN106149736B (en) | The stable construction method of hillside fields bury excavation slope is kept based on draining is cut | |
| Bakhodir et al. | Filtration reliability of the channel with concrete lining | |
| CN210946854U (en) | Anti-seepage structure of foundation pit elevator shaft |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190329 Termination date: 20210314 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |