CN113482620B - Pit slope restoration backfill method - Google Patents
Pit slope restoration backfill method Download PDFInfo
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- CN113482620B CN113482620B CN202110914230.9A CN202110914230A CN113482620B CN 113482620 B CN113482620 B CN 113482620B CN 202110914230 A CN202110914230 A CN 202110914230A CN 113482620 B CN113482620 B CN 113482620B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000010410 layer Substances 0.000 claims abstract description 128
- 239000004567 concrete Substances 0.000 claims abstract description 80
- 238000005507 spraying Methods 0.000 claims abstract description 58
- 239000002893 slag Substances 0.000 claims abstract description 35
- 239000002910 solid waste Substances 0.000 claims abstract description 31
- 235000016709 nutrition Nutrition 0.000 claims abstract description 21
- 230000035764 nutrition Effects 0.000 claims abstract description 18
- 239000002344 surface layer Substances 0.000 claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 239000011378 shotcrete Substances 0.000 claims abstract description 5
- 239000002699 waste material Substances 0.000 claims description 23
- 239000003245 coal Substances 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 235000015097 nutrients Nutrition 0.000 claims description 4
- 239000011178 precast concrete Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 239000003673 groundwater Substances 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract 2
- 239000002689 soil Substances 0.000 description 31
- 238000001514 detection method Methods 0.000 description 20
- 241001464837 Viridiplantae Species 0.000 description 17
- 230000004083 survival effect Effects 0.000 description 13
- 244000025254 Cannabis sativa Species 0.000 description 11
- 230000008439 repair process Effects 0.000 description 9
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 6
- 235000011613 Pinus brutia Nutrition 0.000 description 6
- 241000018646 Pinus brutia Species 0.000 description 6
- 241000124033 Salix Species 0.000 description 6
- 208000002720 Malnutrition Diseases 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 230000001071 malnutrition Effects 0.000 description 5
- 235000000824 malnutrition Nutrition 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 208000015380 nutritional deficiency disease Diseases 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 230000001932 seasonal effect Effects 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/32—Reclamation of surface-mined areas
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
- Revetment (AREA)
Abstract
The invention discloses a pit slope restoration backfilling method, which comprises the following steps of: the concrete spraying device comprises a solid waste layer, a concrete spraying layer and a nutrition matrix layer, wherein the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition matrix layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is not more than 20cm, hollow column piles penetrating through the concrete spraying layer are formed on the concrete spraying layer, the hollow column piles are provided with protruding parts with the length of 5-10cm on the upper surface of the concrete spraying layer and are communicated with the solid waste layer, and the solid waste comprises one or more of waste gas concrete, waste gas slag and slag. The scheme is simple to implement, effectively overcomes the problem of alkali return of sprayed concrete in the traditional repairing process, enhances the circulation of groundwater and avoids water accumulation while maintaining the groundwater level of a repairing area.
Description
Technical Field
The invention relates to repair and maintenance of mine pits, in particular to a pit slope repair and backfill method.
Background
The development and utilization of mineral resources such as coal and the like bring a series of ecological environment disasters while promoting the economic and social development. The pit and the like left after the exploitation can have great influence on the surface ecology and safety, the soil of the dumping site is barren due to accumulation of a large amount of stripping matters generated in the exploitation process, the ground surface is seriously compacted by rolling of a heavy truck in the dumping process, so that plant root taking is difficult, a large amount of surface runoffs are formed under rainfall conditions, sedimentation cracks are generated due to uneven sedimentation of the dumping site, the runoffs are gathered and drilled into the cracks after rainfall, concentrated infiltration is realized, infiltration water is exposed from the lower side slope, collapse, landslide and slope debris flow are induced, and even whole couch is formed. These have a great influence on the production and life of the surrounding area.
For the surface or underground left-over caused by production operation of pits and the like, a landfill repair scheme is generally adopted at present to recover the pits and the like. In traditional restoration scheme, through additionally setting up measures such as isolation layer of isolated nature in the underground, avoid returning the influence of alkali, but this kind of scheme isolation layer self just is a pollutant to this kind of isolation layer's setting still can cut off the circulation of groundwater to a certain extent further, easily forms local ponding in restoration region, thereby influences the planting growth after the restoration.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a pit slope restoration backfill method which can effectively overcome the recycling of solid waste, solve the problem of alkali return of sprayed concrete in the traditional restoration process, and enhance the circulation of groundwater and avoid water accumulation while maintaining the groundwater level of a restoration area.
In order to achieve the above purpose, the embodiment of the invention provides a pit slope restoration backfill method, which comprises the steps of: the concrete spraying device comprises a solid waste layer, a concrete spraying layer and a nutrition matrix layer, wherein the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition matrix layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is not more than 20cm, hollow column piles penetrating through the concrete spraying layer are formed on the concrete spraying layer, the hollow column piles are provided with protruding parts with the length of 5-10cm on the upper surface of the concrete spraying layer, the hollow column piles are communicated with the solid waste layer, and the solid waste comprises one or more of waste concrete, waste slag and slag.
In one or more embodiments of the present invention, the spacing between two adjacent hollow posts on the sprayed concrete layer is 10-20m.
In one or more embodiments of the invention, the hollow pole is a trimmed waste precast utility pole or precast concrete pipe pile or cast-in-place concrete pole.
In one or more embodiments of the present invention, the discarded pre-fabricated pole is trimmed to penetrate the pre-fabricated pole along its axis to form a through-hole, and the diameter of the through-hole in a cross-section of the pre-fabricated pole perpendicular to the axis is not less than one-half the outer diameter of the pre-fabricated pole in that cross-section.
In one or more embodiments of the present invention, the hollow portion of the hollow post is also completely filled with aluminum slag. The full filling is that the compaction is carried out after the filling is finished, and the collapse depth is not more than 2cm after the filling is carried out for 7 days, so that the filled hollow pile does not cause local collapse or loss of a filling part in long-term use, and the circulation of groundwater is not limited due to filling transition.
In one or more embodiments of the present invention, the aluminum slag filled in the hollow pile is a lump slag having a size of 2-5 cm.
In one or more embodiments of the invention, the hollow post has an outer diameter of 10-40cm.
In one or more embodiments of the present invention, the filling thickness of the nutrient substrate layer on the surface layer of the sprayed concrete layer is not less than 40cm.
In one or more embodiments of the invention, the nutrient substrate layer further includes 3-5% by volume of coal cinder.
Compared with the prior art, the pit side slope restoration backfill method provided by the embodiment of the invention can fully reuse solid wastes including waste concrete, slag, steel slag nickel slag and other slag in the pit by reasonably designing the backfill technology and the backfill structure, effectively avoids ground accumulation, reduces the consumption of concrete and the like, and reduces the consumption of resources, energy sources and the like of backfill restoration operation. And the hollow column pile can play a role in repairing the underground water level of the area under the condition, and alkaline substances separated out by long-term soaking of concrete can be adjusted through circulation of underground water in the lower layer area, solid waste extract and an aluminum frame filled in the middle part of the hollow column pile, so that the acidity and alkalinity of soil in the repairing area can be effectively added. Therefore, the arrangement of an isolating layer made of high polymer materials is not needed, and long-term pollution is formed by the high polymer materials underground.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Example 1
The pit slope restoration backfilling method of the embodiment comprises the steps of constructing in layers of a pit: the concrete pile comprises a solid waste layer formed by landfill of waste concrete, waste slag, slag and the like, a concrete spraying layer and a nutrition matrix layer filled with 40cm thick, wherein coal slag accounting for 3% of the total volume is added in the nutrition matrix layer besides the conventional composition, so that the adjustment in terms of microelements, air permeability, acid alkalinity in surface soil and the like is realized, the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition matrix layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is 20cm, a concrete prefabricated hollow pile penetrating through the concrete layer and having 10cm of outer diameter and 8cm of inner diameter is formed on the concrete spraying layer, the hollow part of the hollow pile is completely filled with blocky aluminum slag with the size of 2-3cm, the hollow pile is provided with a 10cm protruding part on the upper surface of the concrete spraying layer and is communicated with the solid waste layer, and the distance between two adjacent hollow piles on the concrete spraying layer is 10m.
The method is applied to open-air coal mine pits in a mountain west place, and after the open-air coal mine pits are repaired, trees such as pine, fir, willow and the like are planted on the ground in spring repair, and grass is planted under the forest. Samples were taken at 20cm underground at a frequency of 2 times per month for 2 years after completion of the restoration to monitor the pH of the soil, and pH detection samples were taken on 1 day and 15 days per month, respectively, labeled pH1 (corresponding to the pH of the soil sample on 1 day of the month) and pH2 (corresponding to the pH of the soil sample on 15 days of the month). The survival rate of green plants is about 95% in one year, the survival rate of green plants is about 93% in two years, and the green plants are good in growth situation, free of malnutrition and normal in growth state.
Wherein "-" indicates that the pH detection value is stable as compared with the previous detection, "×" indicates that the pH detection value is slightly raised as compared with the previous detection, "+" indicates that the pH detection value is slightly lowered as compared with the previous detection, "+ +" indicates that the pH detection value is slightly lowered as compared with the previous detection, and herein "+ +" indicates that the degree of change is slightly greater than the degree of change indicated by "×" and "+ +", the former indicates that the fluctuation range is within 0.5, the latter indicates that the fluctuation range is within 0.2, and the latter indicates that the fluctuation range is within the same.
The result shows that the method has good repairing state on the pit in the implementation process, and the overall fluctuation is small and the growth of green plants such as trees, grass and the like is not influenced although the pH value of the soil is influenced by seasonal climate such as storm, drought and the like to influence the underground water level in the detection period.
Example 2
The pit slope restoration backfilling method of the embodiment comprises the steps of constructing in layers of a pit: the method comprises the steps of burying a solid waste layer formed by waste concrete, waste slag, slag and the like, spraying a concrete layer, and filling a nutritional matrix layer with the thickness of 50cm, wherein coal slag accounting for 4.5% of the total volume is added in the nutritional matrix layer besides the conventional composition, so that the adjustment in terms of microelements, air permeability, acid alkalinity in surface soil and the like is realized, the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutritional matrix layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is 10cm, concrete hollow column piles penetrating through the concrete layer and having the outer diameter of 35cm and the inner diameter of 28cm are formed on the concrete spraying layer, the hollow parts of the hollow column piles are completely filled with blocky aluminum slag with the size of 3-5cm, the hollow column piles are provided with 7cm protruding parts on the upper surface of the concrete spraying layer and are communicated with the solid waste layer, and the distance between two adjacent hollow column piles on the concrete spraying layer is 20m.
The method is applied to open-air coal mine pits in a mountain west place, and after the open-air coal mine pits are repaired, trees such as pine, fir, willow and the like are planted on the ground in spring repair, and grass is planted under the forest. Samples were taken at 20cm underground at a frequency of 2 times per month for 2 years after completion of the restoration to monitor the pH of the soil, and pH detection samples were taken on 1 day and 15 days per month, respectively, labeled pH1 (corresponding to the pH of the soil sample on 1 day of the month) and pH2 (corresponding to the pH of the soil sample on 15 days of the month). The survival rate of green plants is about 95% in one year, the survival rate of green plants is about 95% in two years, and meanwhile, the growth situation is good, the malnutrition is avoided, and the growth state is normal.
The result shows that the method has good repairing state on the pit in the implementation process, and the overall fluctuation is small and the growth of green plants such as trees, grass and the like is not influenced although the pH value of the soil is influenced by seasonal climate such as storm, drought and the like to influence the underground water level in the detection period.
Example 3
The pit slope restoration backfilling method of the embodiment comprises the steps of constructing in layers of a pit: the method comprises the steps of burying a solid waste layer formed by waste concrete, waste slag, slag and the like, spraying a concrete layer, and filling a nutrition substrate layer with the thickness of 60cm, wherein coal slag accounting for 3.5% of the total volume is added in the nutrition substrate layer besides the conventional composition, so that the adjustment in terms of microelements, air permeability, acid alkalinity in surface soil and the like is realized, the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition substrate layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is 15cm, in-situ cast concrete hollow posts with the outer diameter of 20cm and the inner diameter of 15cm penetrating through the layer are formed on the concrete spraying layer, the hollow parts of the hollow posts are completely filled with blocky aluminum slag with the size of 2-3cm, the hollow posts are provided with protruding parts with the size of 6cm on the upper surface of the concrete spraying layer and are communicated with the solid waste layer, and the distance between two adjacent hollow posts on the concrete spraying layer is 15m.
The method is applied to open-air coal mine pits in a mountain west place, and after the open-air coal mine pits are repaired, trees such as pine, fir, willow and the like are planted on the ground in spring repair, and grass is planted under the forest. Samples were taken at 20cm underground at a frequency of 2 times per month for 2 years after completion of the restoration to monitor the pH of the soil, and pH detection samples were taken on 1 day and 15 days per month, respectively, labeled pH1 (corresponding to the pH of the soil sample on 1 day of the month) and pH2 (corresponding to the pH of the soil sample on 15 days of the month). The survival rate of green plants is about 96% in one year, the survival rate of green plants is about 94% in two years, and meanwhile, the growth situation is good, malnutrition is avoided, and the growth state is normal.
The result shows that the method has good repairing state on the pit in the implementation process, and the overall fluctuation is small and the growth of green plants such as trees, grass and the like is not influenced although the pH value of the soil is influenced by seasonal climate such as storm, drought and the like to influence the underground water level in the detection period.
Example 4
The pit slope restoration backfilling method of the embodiment comprises the steps of constructing in layers of a pit: the method comprises the steps of burying a solid waste layer formed by waste concrete, waste slag, slag and the like, spraying a concrete layer, and filling a nutrition substrate layer with the thickness of 70cm, wherein coal slag accounting for 4% of the total integral is added in the nutrition substrate layer besides the conventional composition, so that the adjustment in terms of microelements, air permeability, acid alkalinity in surface soil and the like is realized, the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition substrate layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is 8cm, waste precast electric poles with the outer diameter of 30cm and the average inner diameter of 25cm penetrating through the layer are formed on the concrete spraying layer, the hollow parts of the waste precast electric poles are completely filled with blocky aluminum slag with the size of 4-5cm, the upper surfaces of the waste precast electric poles are provided with protruding parts with the size of 8cm, the hollow column piles are communicated with the solid waste layer, and the distance between two adjacent waste precast electric poles on the concrete spraying layer is 18m.
The method is applied to outdoor rare earth pits in places in Sichuan, and after the outdoor rare earth pits are repaired, trees such as pine, fir, willow and the like are planted on the ground in spring repair, and grass is planted under the forest. Samples were taken at 20cm underground at a frequency of 2 times per month for 2 years after completion of the restoration to monitor the pH of the soil, and pH detection samples were taken on 1 day and 15 days per month, respectively, labeled pH1 (corresponding to the pH of the soil sample on 1 day of the month) and pH2 (corresponding to the pH of the soil sample on 15 days of the month). The survival rate of green plants is about 98% in one year, the survival rate of green plants is about 95% in two years, and meanwhile, the growth situation is good, malnutrition is avoided, and the growth state is normal.
The result shows that the method has good repairing state on the pit in the implementation process, and the overall fluctuation is small and the growth of green plants such as trees, grass and the like is not influenced although the pH value of the soil is influenced by seasonal climate such as storm, drought and the like to influence the underground water level in the detection period.
Example 5
The pit slope restoration backfilling method of the embodiment comprises the steps of constructing in layers of a pit: the concrete pile comprises a solid waste layer formed by landfill of waste concrete, waste slag, slag and the like, a concrete spraying layer and a nutrition matrix layer with the filling thickness of 80cm, wherein coal slag accounting for 5% of the total volume is added in the nutrition matrix layer besides the conventional composition, so that the adjustment in terms of microelements, air permeability, acid alkalinity in surface soil and the like is realized, the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition matrix layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is 12cm, concrete cast-in-situ hollow column piles penetrating the concrete layer and having the outer diameter of 40cm and the inner diameter of 30cm are formed on the concrete spraying layer, the hollow part of each hollow column pile is completely filled with blocky aluminum slag with the size of 3-5cm, the hollow column piles are provided with 5cm protruding parts on the upper surface of the concrete spraying layer and are communicated with the solid waste layer, and the distance between two adjacent hollow column piles on the concrete spraying layer is 13m.
The method is applied to open-air coal mine pits in a mountain west place, and after the open-air coal mine pits are repaired, trees such as pine, fir, willow and the like are planted on the ground in spring repair, and grass is planted under the forest. Samples were taken at 20cm underground at a frequency of 2 times per month for 2 years after completion of the restoration to monitor the pH of the soil, and pH detection samples were taken on 1 day and 15 days per month, respectively, labeled pH1 (corresponding to the pH of the soil sample on 1 day of the month) and pH2 (corresponding to the pH of the soil sample on 15 days of the month). The survival rate of green plants is about 96% in one year, the survival rate of green plants is about 94% in two years, and meanwhile, the growth situation is good, malnutrition is avoided, and the growth state is normal.
The result shows that the method has good repairing state on the pit in the implementation process, and the overall fluctuation is small and the growth of green plants such as trees, grass and the like is not influenced although the pH value of the soil is influenced by seasonal climate such as storm, drought and the like to influence the underground water level in the detection period.
Comparative example 1
The comparative example differs from example 1 only in that the concrete-sprayed layer was not provided with hollow piles, which were directly cast from mortar, and 2 layers of asphalt felt were laid on the surface of the concrete-sprayed layer.
The comparative example is applied to open-air coal mine pits in a certain mountain and western places, and after the open-air coal mine pits are repaired, trees such as pine, fir, willow and the like are planted on the ground in spring repair, and grass is planted under the forest. Soil pH was monitored by sampling at 20cm underground at a frequency of 2 times per month for 2 years after completion of remediation, pH detection sampling was performed on 1 day and 15 days per month, respectively, labeled pH1 (corresponding to 1 day of the month soil sample pH) and pH2 (corresponding to 15 days of the month soil sample pH), respectively, with overall pH levels lower than the example 1 control. Green plants had a annual survival rate of about 95%, a two year survival rate of about 85%, a 3 year survival rate of about 60%, and the growth situation was general, and part of the area had yellow leaves, which may be associated with asphalt felt contamination, and asphalt components were detected in the soil at the time of sampling after 1 year, and the asphalt component detection amount increased significantly after two years.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (1)
1. A pit slope restoration backfill method comprises the steps of constructing in a pit layer by layer: the concrete spraying layer and the nutrition substrate layer are characterized by further comprising a solid waste layer formed by filling solid waste at the bottom of a pit, the concrete spraying layer is formed on the surface layer of the solid waste layer, the nutrition substrate layer is formed on the surface layer of the concrete spraying layer, the thickness of the concrete spraying layer is not more than 20cm, a hollow post penetrating through the concrete spraying layer is formed on the concrete spraying layer, the hollow post is provided with a protruding part with the length of 5-10cm on the upper surface of the concrete spraying layer and is communicated with the solid waste layer, the solid waste comprises one or more of waste concrete and waste slag, the distance between two adjacent hollow posts on the concrete spraying layer is 10-20m, the hollow post is a finished waste precast wire pole or precast concrete post or cast-in-place concrete post, the waste prefabricated telegraph pole is trimmed to penetrate the prefabricated telegraph pole along the axis of the prefabricated telegraph pole to form a through hole, the diameter of the through hole in a section of the prefabricated telegraph pole perpendicular to the axis is not less than one half of the outer diameter of the prefabricated telegraph pole in the section, the hollow part of the hollow post is also completely filled with aluminum slag, the aluminum slag filled in the hollow post is blocky waste residue with the size of 2-5cm, the outer diameter of the hollow post is 10-40cm, the filling thickness of the nutrient substrate layer on the surface layer of the sprayed concrete layer is not less than 40cm, and the nutrient substrate layer also comprises coal slag with the volume fraction of 3-5%.
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| CN213897164U (en) * | 2020-09-12 | 2021-08-06 | 河北省地矿局第二地质大队 | Concrete precast segment assembly spraying concrete reinforcing soil tank |
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2021
- 2021-08-10 CN CN202110914230.9A patent/CN113482620B/en active Active
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| CN213897164U (en) * | 2020-09-12 | 2021-08-06 | 河北省地矿局第二地质大队 | Concrete precast segment assembly spraying concrete reinforcing soil tank |
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| CN112854261A (en) * | 2021-02-01 | 2021-05-28 | 深圳市万信达生态环境股份有限公司 | Ecological restoration method suitable for concrete spraying side slope |
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