CN103882834A - Ash dam upstream fitting-slope seepage draining structure - Google Patents
Ash dam upstream fitting-slope seepage draining structure Download PDFInfo
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- CN103882834A CN103882834A CN201410075555.2A CN201410075555A CN103882834A CN 103882834 A CN103882834 A CN 103882834A CN 201410075555 A CN201410075555 A CN 201410075555A CN 103882834 A CN103882834 A CN 103882834A
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Abstract
The invention belongs to the field of ash dam structures and particularly relates to an ash dam upstream fitting-slope seepage draining structure of hydraulic ash dams and dry ash dams suitable for fuel coal thermal power plants. Geotechnical cloth and a geomembrane are adhered to two sides of a geonet through thermal bonding to form the fitting-slope seepage draining structure. A bottom layer sand protecting layer 100mm in thickness is laid on an ash dam upstream nature soil slide slope after the slope is finished. The fitting-slope seepage draining structure is laid on the bottom layer sand protecting layer, the geomembrane faces the ash slope upstream natural soil side slope, and the geotechnical cloth faces an ash layer. An upper layer sand protecting layer 100mm in thickness is laid on the geotechnical cloth side of the fitting-slope seepage draining structure, and slope protection rock blocks are constructed. The fitting-slope seepage draining structure has the advantages that the construction cost of the fitting-slope seepage draining structure is 35 yuan/m<2>, and construction cost is reduced by about 65%; traditional fitting-slope seepage draining structures needs to be synchronously constructed with a dam body, construction interference is large, the fitting-slope seepage draining structure can be constructed after the dam body is constructed, construction interference is avoided, and construction period is lowered effectively.
Description
Technical field
The invention belongs to structure field, grey dam, subsides slope, the Hui Ba upstream row who relates in particular to a kind of waterpower ash storage dam applicable to coal-fired station and dry ash storage dam is oozed structure.
Background technology
Ash dam (ash dam) is coal-fired station in mountain valley ash for storing the water conservancy project structure of grey dash, and multiplex earth and stone material or grey slag charge fill.Subsides slope, upstream row is oozed structure (drain on dam slope) and is laid on the domatic surface drainage facility in Hui Ba upstream, prevents that buck from entering dam body, makes dam slope soil that seepage failure occur, and can protect Hui Ba upstream side slope not washed away.Traditional subsides slope row is oozed structure and is adopted geotextile and piece clitter to build composition more, require high to various materials, building stones need that stone matter is hard, fresh, seamless process exfoliation layer, and should have the characteristic that can keep higher-strength after weather resistance, immersion, and geotextile tension, anti-bursting requirement of strength are high; This subsides slope row is oozed the thick nearly 1.0m of block structure stone, and need to construct with dam embankment simultaneously, operation is many, between each operation, construction is disturbed large, and easily cause geotextile to destroy, exist the defects such as less economical, long in time limit, drainage is unstable, anti-seepage effect is poor so tradition subsides slope row is oozed structure.Along with the increasing of country to environmental protection dynamics, require ash disposal area zero-emission, Hui Baduo is designed to non-permeable dam type, and this just requires, and Hui Ba upstream should arrange that drainability is strong, the subsides slope row of good seepage-proof property and stable and reliable operation is oozed structure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of drainability strong, the subsides slope row of good seepage-proof property and stable and reliable operation is oozed structure, is intended to upstream, lower ash discharge dam ponding, the phreatic line before reduction dam in deposition lime-ash, to improve the stability of dam body, ensure the safety of ash disposal area.
The present invention is achieved in that subsides slope, a kind of Hui Ba upstream row oozes structure, and in geotechnological web-roll core both sides, heat seal is pasted geotextiles and geomembrane and made and paste slope row and ooze structure respectively; Be 100mm at the Hui Ba upstream original soil side slope laying bottom sand protective layer thickness of repairing behind slope; On bottom sand topping, lay and paste slope row and ooze structure, geomembrane is towards Hui Ba upstream original soil side slope side, and geotextiles is towards lime-ash side, the upper strata sand topping that is 100mm at the geotextiles side laying depth that pastes slope row and ooze structure, then pitching piece stone.
Further, geotextiles and geotechnological web-roll core all adopt lap joint, and lap width is 100～300mm, and geomembrane adopts welding point, and weld width is 100～150mm.
Further, be parallel to gradient arrangement along longitudinal lap joint seam and the weld seam orientation of dam slope direction.
Further, described geotechnological web-roll core is the 3-D solid structure plastic wire being made up of vertical ribs and two tilting ribs of top and bottom of a centre.
Further, bottom sand topping and upper strata sand topping are medium sand, and mud content is 0～5%.
Further, geotextiles adopts anti-filter non-woven geotextile.
Further, geomembrane adopts high density polyethylene (HDPE) anti-seepage geomembrane.
Further, the thickness of slop protection block stone is 280～350mm.
Compared with prior art, beneficial effect is in the present invention: drain system of the present invention has combined geotextiles (reverse filter effect), geotechnological web-roll core (draining) and geomembrane (antiseepage), and complete " anti-filter--draining--antiseepage " effect is provided.Sand topping provides protective effect to geotextiles and geomembrane.
Geotextiles is a kind of geotextile of strengthening water sport and hindering soil movement, has the several functions such as anti-filter, draining, isolation, can effectively discharge buck and hold back grey solid impurity particle.The plastic wire that geotechnique's web-roll core is 3-D solid structure, is made up of the tilting rib of an intermediate vertical rib and top and two of bottoms, can bear larger compression load, can ensure again good hydraulic conductivity.The structure of the present invention adopting can effectively overcome the differential settlement of basal plane, is applicable to ash dyke or earth and rockfill dam domatic, can use at a lower temperature, reaches 50 years application life.Buck before dam in deposition lime-ash is after geotextiles is filtered, and buck enters into row and oozes structure, and grey solid impurity particle is trapped in before geotextiles, and buck is discharged by the drainage system that drains into upstream toe under geotechnological web-roll core.Geomembrane prevents that buck from entering in dam body effectively, has ensured the safety of dam body, has effectively protected environment.The present invention reduces construction costs effectively, and traditional subsides slope row is oozed the about 100 yuan/m of structural cost
2, and the subsides slope of this invention row to ooze structural cost be only 35 yuan/m
2, reduced by approximately 65% construction costs.Traditional subsides slope drain system need to be synchronizeed and carry out with dam embankment, and construction is disturbed large, and the drain system structure of this invention can be constructed after dam embankment, disturbs without construction, effectively reduces the duration.Improved drainage effect, experiment shows, the discharge rate of this invention is equivalent to the discharge rate of the piece stone drain system that 1.0m is thick.
Brief description of the drawings
Fig. 1 is that subsides slope, Hui Ba of the present invention upstream row is oozed section of structure.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, subsides slope, a kind of Hui Ba upstream row is oozed structure, and in geotechnological web-roll core 2 both sides, heat seal is pasted geotextiles 1 and geomembrane 3 and made and paste slope row and ooze structure respectively; Be 100mm at the Hui Ba upstream original soil side slope laying bottom sand protective layer thickness of repairing behind slope; On bottom sand topping 4, lay and paste slope row and ooze structure, geomembrane 3 is towards Hui Ba upstream original soil side slope side, and geotextiles 1 is towards lime-ash side, the upper strata sand topping 5 that is 100mm at the geotextiles side laying depth that pastes slope row and ooze structure, then pitching piece stone.Geotextiles 1 and geotechnological web-roll core 2 all adopt lap joint, and lap width is 100～300mm, and geomembrane 3 adopts welding point, and adjacent geomembrane adopts bonding machine, welding compound, double slit heat seal welding or single seam extruding weldering, and weld width is 100mm.Longitudinal lap joint seam and weld seam orientation along dam slope direction are parallel to gradient arrangement, along arranging perpendicular to axis of dam direction.Between geomembrane 3 and geotechnological web-roll core 2, adopt heat seal gluing, between geotextiles 1 and geotechnological web-roll core 2, adopt heat seal gluing.In the present embodiment, geotechnological web-roll core is the 3-D solid structure plastic wire being made up of vertical ribs and two tilting ribs of top and bottom of a centre.Bottom sand topping 4 and upper strata sand topping 5 are medium sand.Geotextiles adopts anti-filter non-woven geotextile (500g/m
3).Geomembrane adopts high density polyethylene (HDPE) anti-seepage geomembrane (GH-27000/1.0).The thickness of slop protection block stone is 300mm.
Subsides slope, Hui Ba upstream row is oozed structure building method, and after the step comprising: a, Hui Ba fill, up stream slope is repaiied slope leveling; B, laying sand topping, thick 100mm, mud content 4%, transmission coefficient is greater than 6 × 10
-3cm/s; C, lay and paste slope row and ooze structure, geotextiles, geotechnological web-roll core overlap joint connect, and geomembrane is welded to connect, and connecting length is 100mm.D, laying medium sand topping, thick 100mm, mud content 3%, transmission coefficient is greater than 6 × 10
-3cm/s; E, laying armour rock, thick 300mm.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. Hui Ba upstream subsides slope row is oozed a structure, it is characterized in that, in geotechnological web-roll core both sides, heat seal is pasted geotextiles and geomembrane and made and paste slope row and ooze structure respectively; Be 100mm at the Hui Ba upstream original soil side slope laying bottom sand protective layer thickness of repairing behind slope; On bottom sand topping, lay and paste slope row and ooze structure, geomembrane is towards Hui Ba upstream original soil side slope side, and geotextiles is towards lime-ash side, the upper strata sand topping that is 100mm at the geotextiles side laying depth that pastes slope row and ooze structure, then pitching piece stone.
2. ooze structure according to subsides slope, Hui Ba claimed in claim 1 upstream row, it is characterized in that, geotextiles and geotechnological web-roll core all adopt lap joint, and lap width is 100～300mm, and geomembrane adopts welding point, and weld width is 100～150mm.
3. ooze structure according to subsides slope, Hui Ba claimed in claim 2 upstream row, it is characterized in that, be parallel to gradient arrangement along longitudinal lap joint seam and the weld seam orientation of dam slope direction.
4. ooze structure according to subsides slope, Hui Ba claimed in claim 2 upstream row, it is characterized in that, described geotechnological web-roll core is the 3-D solid structure plastic wire being made up of the vertical ribs of a centre and two tilting ribs of top and bottom.
5. ooze structure according to subsides slope, Hui Ba claimed in claim 1 upstream row, it is characterized in that, bottom sand topping and upper strata sand topping are medium sand, and thickness is 100mm, and mud content is 0～5%.
6. ooze structure according to subsides slope, Hui Ba claimed in claim 1 upstream row, it is characterized in that, geotextiles adopts anti-filter non-woven geotextile.
7. ooze structure according to subsides slope, Hui Ba claimed in claim 1 upstream row, it is characterized in that, geomembrane adopts high density polyethylene (HDPE) anti-seepage geomembrane.
8. ooze structure according to subsides slope, Hui Ba claimed in claim 1 upstream row, it is characterized in that, the thickness of slop protection block stone is 280～350mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410075555.2A CN103882834A (en) | 2014-03-03 | 2014-03-03 | Ash dam upstream fitting-slope seepage draining structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410075555.2A CN103882834A (en) | 2014-03-03 | 2014-03-03 | Ash dam upstream fitting-slope seepage draining structure |
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| CN103882834A true CN103882834A (en) | 2014-06-25 |
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| CN201410075555.2A Pending CN103882834A (en) | 2014-03-03 | 2014-03-03 | Ash dam upstream fitting-slope seepage draining structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631425A (en) * | 2014-12-18 | 2015-05-20 | 河南省电力勘测设计院 | Method for accelerating seepage eliminating and solidification of coal ash |
| CN107503322A (en) * | 2017-07-19 | 2017-12-22 | 江西省水利科学研究院 | A kind of preparation method for the earth and rockfill dam downstream patch slope concrete slab for filtering native draining |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009084790A (en) * | 2007-09-27 | 2009-04-23 | Kajima Corp | Construction method for concrete dam body |
| CN201738208U (en) * | 2010-06-25 | 2011-02-09 | 中交第二公路勘察设计研究院有限公司 | Roadbed structure for preventing road damage in seasonally frozen ground area |
| CN102002961A (en) * | 2010-10-19 | 2011-04-06 | 浙江大学 | Impermeable gasket for bottom side slope of refuse landfill |
| CN203200794U (en) * | 2013-04-28 | 2013-09-18 | 北京锄禾环保技术有限公司 | Landfill impervious structure with old garbage as base |
| CN203808018U (en) * | 2014-03-03 | 2014-09-03 | 辽宁电力勘测设计院 | Drainage structure on embankment slope upstream of ash dam |
-
2014
- 2014-03-03 CN CN201410075555.2A patent/CN103882834A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009084790A (en) * | 2007-09-27 | 2009-04-23 | Kajima Corp | Construction method for concrete dam body |
| CN201738208U (en) * | 2010-06-25 | 2011-02-09 | 中交第二公路勘察设计研究院有限公司 | Roadbed structure for preventing road damage in seasonally frozen ground area |
| CN102002961A (en) * | 2010-10-19 | 2011-04-06 | 浙江大学 | Impermeable gasket for bottom side slope of refuse landfill |
| CN203200794U (en) * | 2013-04-28 | 2013-09-18 | 北京锄禾环保技术有限公司 | Landfill impervious structure with old garbage as base |
| CN203808018U (en) * | 2014-03-03 | 2014-09-03 | 辽宁电力勘测设计院 | Drainage structure on embankment slope upstream of ash dam |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631425A (en) * | 2014-12-18 | 2015-05-20 | 河南省电力勘测设计院 | Method for accelerating seepage eliminating and solidification of coal ash |
| CN107503322A (en) * | 2017-07-19 | 2017-12-22 | 江西省水利科学研究院 | A kind of preparation method for the earth and rockfill dam downstream patch slope concrete slab for filtering native draining |
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Application publication date: 20140625 |