CN109629609B - Landfill liner layer anchoring structure utilizing rice hull ash concrete - Google Patents
Landfill liner layer anchoring structure utilizing rice hull ash concrete Download PDFInfo
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- CN109629609B CN109629609B CN201811620489.7A CN201811620489A CN109629609B CN 109629609 B CN109629609 B CN 109629609B CN 201811620489 A CN201811620489 A CN 201811620489A CN 109629609 B CN109629609 B CN 109629609B
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- ash concrete
- anchoring
- rice hull
- hull ash
- liner layer
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- 239000004567 concrete Substances 0.000 title claims abstract description 74
- 238000004873 anchoring Methods 0.000 title claims abstract description 61
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 56
- 235000009566 rice Nutrition 0.000 title claims abstract description 56
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 55
- 239000004575 stone Substances 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 6
- 239000004746 geotextile Substances 0.000 claims abstract description 6
- 239000010903 husk Substances 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000011178 precast concrete Substances 0.000 abstract 1
- 239000010813 municipal solid waste Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a landfill liner layer anchoring structure utilizing rice hull ash concrete, and belongs to the technical field of environmental protection. The method is characterized in that a lining layer is arranged on a side slope of the refuse landfill, the lining layer is specifically a middle anti-seepage film and geotextiles on two sides, a rice hull ash concrete anchoring shell is arranged at the top end of the side slope or a middle platform, the rice hull ash concrete anchoring shell is fixed in an anchoring groove through a precast concrete pile, the lining layer is turned over in the rice hull ash concrete anchoring shell, an upper punching PVC pipe is arranged at the lower part in the anchoring shell, rice hull ash concrete filler is poured on the periphery of the upper punching PVC pipe, and broken stones are filled on the upper part of the upper punching PVC pipe. This anchor structure adopts the construction of part prefabricated assembled, and standardized preparation can be carried out to some parts, has the function of collecting drainage guide leachate concurrently.
Description
Technical Field
The invention relates to a liner layer anchoring structure of a municipal refuse sanitary landfill, belonging to the technical field of environmental protection.
Background
With the development of national economy and the improvement of urbanization level, the generation amount of municipal solid waste is increased sharply. There are three main final disposal methods for municipal solid waste: sanitary landfill, composting and incineration. Among them, sanitary landfill is the most common garbage disposal technology in the world at present. On the basis of scientific site selection, necessary site protection treatment means and reasonable landfill structure are adopted to reduce and eliminate the influence of garbage on the environment, especially on the pollution of underground water bodies to the greatest extent. In recent years, many cities have built large domestic waste landfills in succession.
In municipal sanitary landfills, a liner system must be provided to prevent leachate from penetrating into the ground and causing contamination of the groundwater. In the process of landfill, the garbage is filled in layers and blocks, tension is formed in the liner layer due to continuous accumulation and continuous compression of the garbage and the action of a landfill operation vehicle, the liner system can lose the original action, and in order to prevent the phenomenon, an anchoring area is generally arranged at the top end of the side slope or at the platform of the sectional side slope.
The liner layer of the refuse landfill is anchored by a groove anchoring system, the edges of the geomembrane and the protective fabric are folded in the groove and are fixed by pouring cement concrete. The side wall and the bottom surface of the groove need to be reinforced in the construction process of the traditional groove anchoring system, the engineering quantity is large, the concrete pouring and curing period on the liner layer is long, and the liner layer under the concrete anchoring body is difficult to maintain and reinforce if damaged. Therefore, the method has certain limitations in functionality and practical performance.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a landfill liner layer anchoring structure utilizing rice hull ash concrete. The problems of large engineering quantity, long construction period, difficult maintenance and reinforcement and the like of the traditional groove anchoring system can be solved or improved.
The technical scheme is as follows:
utilizing a landfill liner layer anchoring structure of rice hull ash concrete, wherein the structure is arranged on a side slope of a refuse landfill; comprises a liner layer covering the side slope;
the liner layer comprises an impermeable membrane in the middle and geotextile layers on two sides;
a middle platform is arranged in the middle section of the side slope;
a rice hull ash concrete anchoring shell is embedded in the middle platform; the liner layer is folded into the rice hull ash concrete anchoring shell and attached to the inner wall of the rice hull ash concrete anchoring shell;
the rice hull ash concrete anchoring shell is of a trapezoidal section, the bottom corner is a round angle, and the top of the rice hull ash concrete anchoring shell is provided with an edge parallel to the middle platform;
a perforated PVC pipe is arranged in the rice hull ash concrete anchoring shell; rice hull ash concrete filler is poured on the periphery of the perforated PVC pipe, and broken stones are filled on the upper portion of the perforated PVC pipe until the middle platform is flush.
Utilize landfill site bedding anchor structure of rice husk ash concrete, its characterized in that: a vertical concrete anchor pile is arranged at the bottom of the pit for placing the rice hull ash concrete anchoring shell; the rice hull ash concrete anchor shell is fixed at the top end of the concrete anchor pile through an expansion bolt and a rubber gasket.
Utilize landfill site bedding anchor structure of rice husk ash concrete, its characterized in that: the rice hull ash concrete anchoring shell is narrow at the top and wide at the bottom, the width of the bottom of the rice hull ash concrete anchoring shell is 1100mm, and the height of the rice hull ash concrete anchoring shell is 900 mm; the bottom of the expansion bolt is provided with a groove for providing space for the bolt cap of the expansion bolt, and the inside of the expansion bolt is provided with a reinforcing mesh.
Utilize landfill site bedding anchor structure of rice husk ash concrete, its characterized in that: the PVC pipe that punches, internal diameter 600mm, wall thickness 20mm, it has the hole to open on the wall.
Utilize landfill site bedding anchor structure of rice husk ash concrete, its characterized in that: the crushed stones are arranged according to the principle of thin stones at the lower part and thick stones at the upper part, wherein the particle size range of the crushed stones is 5-30 mm.
Utilize landfill site bedding anchor structure of rice husk ash concrete, its characterized in that: the concrete anchor pile is 1.5m long and 25cm in diameter, the bottom of the concrete anchor pile is conical, and the upper end of the concrete anchor pile is provided with a reserved hole.
Utilize landfill site bedding anchor structure of rice husk ash concrete, its characterized in that: the thickness of the rice husk ash concrete anchoring shell is 120 mm.
The advantages and effects are as follows:
the landfill liner layer anchoring structure utilizing the rice hull ash concrete can adopt factory prefabrication, field assembly type construction and standardized manufacturing of the anchoring shell and the concrete anchor pile, can improve the working efficiency and shorten the construction period. On the premise of meeting the anchoring technical requirements, the problems of large engineering quantity, long construction period, difficult maintenance and reinforcement and the like of the traditional groove anchoring system can be solved. In addition, the landfill liner layer anchoring structure utilizing the rice hull ash concrete has the functions of collecting and draining percolate besides the anchoring function, can improve the treatment efficiency of the landfill percolate, and enables the overall layout of a landfill to be more scientific, reasonable, safe and reliable.
Description of the drawings:
FIG. 1 is a schematic view showing a structure of anchoring a liner layer of a landfill site using rice husk ash concrete;
FIG. 2 is a detailed view of a rice hull ash concrete anchoring shell;
the attached drawings are marked as follows:
1, side slope; 2, an impermeable membrane; 3 a geotextile layer; 4 an intermediate platform; 5, anchoring the shell by rice hull ash concrete; 6, expanding the bolt; 7 a rubber gasket; 8, anchoring concrete piles; 9 punching PVC pipe; 10 rice husk ash concrete filler; 11 breaking the stone.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings: as shown in fig. 1, a groove is dug at the top end of the side slope or at the middle platform, a pre-fabricated concrete anchor pile is driven into the bottom of the groove, and then the rice hull ash concrete anchor shell is fixed at the upper end of the concrete anchor pile through an expansion bolt and a rubber gasket. And backfilling the grooves on the two sides of the anchoring shell until the top surface is flat. And sequentially turning the lower-layer geotextile, the anti-seepage geomembrane and the upper-layer geotextile of the lining layer material into the rice husk ash concrete anchoring shell, then placing the upper-part perforated PVC pipe at the inner lower part of the anchoring shell, pouring rice husk ash concrete filler at the periphery, and filling broken stones at the upper part after the health preservation is qualified.
As shown in fig. 2, the anchoring shell is made of rice hull ash concrete material, and has the advantages of light weight and low cost. The section shape is trapezoidal, upper portion is narrow wide down, and anchoring shell bottom width 1100mm, height 900m, the internal casting rice husk ash concrete filler is fixed the bedding. The bottom of the rice hull ash concrete anchoring shell is provided with a groove, so that a space is provided for the expansion bolt cap, the bottom surface inside the anchoring shell is kept flat without projections, and the installation of an anchoring body is not influenced.
The PVC pipe has better tensile strength and compressive strength, smooth pipe wall and small resistance to fluid, the roughness coefficient of the PVC pipe is only 0.009, and the water delivery capacity of the PVC pipe is improved by 20 percent compared with that of a cast iron pipe with the same pipe diameter and is improved by 40 percent compared with that of a concrete pipe; the PVC water pipe has excellent acid resistance, alkali resistance and corrosion resistance, is not influenced by moist moisture and soil pH value, does not need any anticorrosive treatment when being laid, and the upper part of the PVC pipe is perforated so as to facilitate the inflow of percolate. The particle size range of the filled broken stones on the upper part is 5-30 mm, the broken stones are arranged according to the principle of fine bottom and coarse top, the filtering effect on the influent leachate is achieved, and the PVC pipe blockage caused by long-time application is prevented. And (5) pumping the percolate at a proper position, and performing purification treatment in a centralized way.
The concrete anchor pile is 1.5m long, 25cm in diameter, conical at the bottom for construction and piling, and provided with a preformed hole at the upper end for inserting an expansion bolt. The distance between the concrete anchor piles arranged along the longitudinal direction of the anchoring shell can be determined according to factors such as the stress of the backing layer and the like.
The foregoing is only a preferred embodiment of the present invention. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. Utilize landfill bed backing anchor structure of rice husk ash concrete, its characterized in that: the structure is arranged on a side slope (1) of a refuse landfill; comprises a liner layer covering the side slope (1);
the liner layer comprises an impermeable membrane (2) in the middle and geotextile layers (3) on two sides;
a middle platform (4) is arranged at the middle section of the side slope (1);
a rice hull ash concrete anchoring shell (5) is embedded in the middle platform (4); the liner layer is folded into the rice hull ash concrete anchoring shell (5) and attached to the inner wall of the rice hull ash concrete anchoring shell;
the rice hull ash concrete anchoring shell (5) is of a trapezoidal section, the bottom corners are rounded corners, and the top is provided with an edge parallel to the middle platform (4);
a perforated PVC pipe (9) is arranged in the rice hull ash concrete anchoring shell (5); rice hull ash concrete filler (10) is poured around the perforated PVC pipe, and broken stones (11) are filled on the upper part of the perforated PVC pipe until the middle platform (4) is level;
a vertical concrete anchor pile (8) is arranged at the bottom of the pit for placing the rice husk ash concrete anchoring shell (5); the rice hull ash concrete anchoring shell (5) is fixed at the top end of a concrete anchoring pile (8) through an expansion bolt (6) and a rubber gasket (7).
2. The structure of anchoring a landfill yard liner layer using rice husk ash concrete according to claim 1, wherein: the rice hull ash concrete anchoring shell (5) is narrow at the top and wide at the bottom, the width of the bottom is 1100mm, and the height is 900 mm; the bottom is provided with a groove to provide space for the cap of the expansion bolt (6), and a reinforcing mesh is arranged inside the groove.
3. The structure of anchoring a landfill yard liner layer using rice husk ash concrete according to claim 1, wherein: the PVC pipe (9) that punches, internal diameter 600mm, wall thickness 20mm, it has the hole to open on the wall.
4. The structure of anchoring a landfill yard liner layer using rice husk ash concrete according to claim 1, wherein: the crushed stones (11) are arranged according to the principle of thin bottom and thick top within the particle size range of 5-30 mm.
5. The structure of anchoring a landfill yard liner layer using rice husk ash concrete according to claim 1, wherein: the concrete anchor pile (8) is 1.5m long, 25cm in diameter, conical in bottom and provided with a reserved hole at the upper end.
6. The structure of anchoring a landfill yard liner layer using rice husk ash concrete according to claim 1, wherein: the thickness of the rice hull ash concrete anchoring shell (5) is 120 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811620489.7A CN109629609B (en) | 2018-12-28 | 2018-12-28 | Landfill liner layer anchoring structure utilizing rice hull ash concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811620489.7A CN109629609B (en) | 2018-12-28 | 2018-12-28 | Landfill liner layer anchoring structure utilizing rice hull ash concrete |
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| Publication Number | Publication Date |
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| CN109629609A CN109629609A (en) | 2019-04-16 |
| CN109629609B true CN109629609B (en) | 2021-01-22 |
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| CN201811620489.7A Active CN109629609B (en) | 2018-12-28 | 2018-12-28 | Landfill liner layer anchoring structure utilizing rice hull ash concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188367B (en) * | 2020-02-21 | 2021-08-13 | 沈阳工业大学 | Geomembrane fixing device laid on slope |
| CN111188368B (en) * | 2020-02-21 | 2021-08-13 | 沈阳工业大学 | Anti-seepage layer pre-stressed fixing sleeve |
| CN113106924A (en) * | 2021-04-23 | 2021-07-13 | 中水北方勘测设计研究有限责任公司 | Slope top anchoring method for side slope seepage-proofing waterproof blanket |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030021780A (en) * | 2001-09-07 | 2003-03-15 | 주식회사 엔바이로피아 | Film combined drainage matters of groundwater for protect liner system in landfill sites |
| CN202227453U (en) * | 2011-08-24 | 2012-05-23 | 中国水电顾问集团华东勘测设计研究院 | Floor drain type seepage-proofing drainage-guiding structure of refuse landfill |
| CN103643689B (en) * | 2013-12-06 | 2015-08-12 | 上海申元岩土工程有限公司 | A kind of pipe type underground water drainage blind ditch and construction technology thereof and application |
| CN203782963U (en) * | 2014-02-25 | 2014-08-20 | 李泽良 | Heat-preservation rice hull ash concrete hollow block |
| CN204626610U (en) * | 2015-01-27 | 2015-09-09 | 北京锄禾环保技术有限公司 | A kind of Slope with multi-step anchor structure realizing rain dirt shunting |
| CN205530580U (en) * | 2016-01-20 | 2016-08-31 | 中国电建集团贵阳勘测设计研究院有限公司 | System for collection is prevented osmosis membrane anchor, is cut flood and current as an organic whole |
| CN206902770U (en) * | 2016-09-23 | 2018-01-19 | 济南大学 | A kind of geomembrane anchors float Structure |
| CN206844169U (en) * | 2017-06-08 | 2018-01-05 | 北京高能时代环境技术股份有限公司 | The intermediate anchoring structure that exposed geomembrane closes |
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