CN115643960A - Green planting construction method for abandoned mine pit - Google Patents

Abstract

The invention discloses a green planting construction method for abandoned mine pits, which comprises the following steps: dividing the pit into three areas from high to low in sequence, selecting different planted seedlings according to humidity and light conditions, and constructing three habitats of drought, middle-living and humid living; simulating the terrain and landform in the field by three-dimensionally scanning the relation between the original cliff and the structures in the field and the landscape and combining the BIM technology, and finishing the planting terrain; for a wet habitat, a waterscape pool is additionally arranged to be connected with a finished granite flume to flow into a pit bottom pool from the pit top, and then a high-pressure water pump is connected with a dry habitat and a medium habitat to realize a water circulation system; transporting different nursery stocks to corresponding dry habitat, middle habitat and wet habitat for nursery stock planting; and covering the nursery stock with a semi-closed acrylic water storage umbrella cover to perform nursery stock maintenance. The ecological restoration of the abandoned pit green planting is realized, a new construction process thought for garden construction is provided, and a certain reference value is achieved.

Description

Green planting construction method for abandoned mine pit

Technical Field

The invention relates to the technical field of pit reconstruction, in particular to a green planting construction method for abandoned pits.

Background

In order to realize sustainable development, on the premise of reasonably transforming and utilizing the abandoned mine pit, the green ecological restoration of the mine pit becomes a problem which is urgently needed to be solved. In the present stage, the ecological restoration of the mine pit is mainly solved by the modes of backfilling the mine pit and planting grass and covering green in China, the method is suitable for the mine pit with smaller scale, and the ecological restoration of planting large trees and building tourism gardens in the large mine pit is not enough.

The prior art has good ecological restoration effect on common small-scale pits, is not suitable for large pits and pits with high side slopes, and is easy to cause backfill collapse and secondary ecological damage after long-time sedimentation in common backfill; in addition, for building gardens in the large-scale tourism industry, the simple backfilling and green covering cannot realize the dual functions of nature and landscape functionality, and cannot create social benefits.

Disclosure of Invention

The invention aims to provide a green planting construction method for abandoned mine pits, realize the green planting ecological restoration of the abandoned mine pits and provide a new construction process idea for garden construction.

In order to achieve the purpose, the invention provides the following technical scheme:

a green planting construction method for abandoned mine pits comprises the following steps:

dividing the pit into three areas from high to low in sequence, selecting different planted seedlings according to humidity and light conditions, and constructing a dry habitat, a middle habitat and a wet habitat;

simulating the terrain and landform in the field by three-dimensionally scanning the relation between the original cliff and the structures in the field and the landscape and combining the BIM technology, and finishing the planting terrain;

the wet habitat is in a bowl-shaped pit body, a waterscape water tank is additionally arranged on the wet habitat to be connected with a finished granite water flowing groove, the finished granite water flowing groove flows into a pit bottom water tank from the pit top, and then the finished granite water flowing groove is connected with the dry habitat and the middle habitat through a high-pressure water pump, so that a water circulating system is realized, flowing water on the cliff wall is utilized, and the surplus water is used for the planting environment improvement of the dry habitat and the middle habitat;

transporting different nursery stocks to corresponding dry habitat, middle habitat and wet habitat for nursery stock planting;

and covering the nursery stock with a semi-closed acrylic water storage umbrella surface to perform nursery stock maintenance.

In the embodiment of the invention, the dry habitat enters from the main entrance of the pit and is connected with a layer of pit bottom platform, the dry habitat utilizes the height difference of a field, and gravel is laid by combining the exposed wall and the stone placement to simulate the dry habitat to construct the plant landscape.

In the embodiment of the invention, the mesobiosis is positioned in the middle of the pit, and various plants with different display topics are selected to be planted to simulate the mesobiosis conditions.

In the embodiment of the invention, the hygrophyte environment utilizes water bodies, streams and falling platforms in the field to plant aquatic, hygrophyte and pudendum moss ferns and herbaceous flowers.

In the embodiment of the invention, in the step of finishing the planting terrain, the retaining wall is made in the form of pouring the concrete retaining wall and installing the gabion wall, and the foundation anchor rod is applied to the foundation of the retaining wall.

In the embodiment of the invention, in the step of planting the nursery stocks, according to the topographic requirements, the micro-topographic coarse shaping and the artificial fine covering surface layer are carried out, the loose soil on the surface is kept, and impurities are cleaned.

In the embodiment of the invention, after the seedling planting is finished, the supporting and binding are carried out, the crown part is supported by adopting a shoulder pole support, a triangular support or a four-corner support, and the trunk is windproof.

In the embodiment of the invention, in the step of maintaining the nursery stock covered by the semi-closed acrylic water storage umbrella cover, the light transmittance is controlled to be 92%, the temperature and the humidity are controlled on the basis of meeting the requirement of the plant on light, and the survival rate of the nursery stock is ensured by adding a greenhouse and arranging temperature and humidity control equipment.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

based on the construction difficulty and related problems of green planting of a large number of abandoned mine pits in the current stage, the method for green planting construction of abandoned mine pits adopts a drainage system of 'ceramic particles, geotextiles and drainage pipes' which is directly added on a rock base layer, solves the problem that surface water is easily accumulated on a lime slaking layer in the abandoned mine pits, avoids rotten roots and rot of plants, and effectively improves the survival rate of the plants; the landscape retaining wall is constructed, so that the excavation of soil and stones is reduced, the energy consumption pollution is reduced, and the dust and noise pollution is reduced; the semi-closed acrylic water storage umbrella cover is added for covering, and the light transmission is controlled to be 92%, so that the temperature and the humidity are controlled on the basis of meeting the requirements of plants on light; the running water on the cliff wall is collected by utilizing the original topographic relief, so that the cliff wall can be used for displaying the landscape of the water pool and storing the running water for irrigation, and the problem of rainfall and water accumulation is solved; calculating the sunshine time of the plants in the pits, simulating the sunshine duration of the plants in each area, reasonably planting the plant varieties in each area corresponding to the sunshine duration, and cultivating and planting the plants with high requirements on temperature and sunshine by using the heat storage performance of the acrylic roof; and (4) guiding field construction by combining three-dimensional scanning of the original terrain with BIM technical scheme comparison. The ecological restoration of the abandoned pit green planting is realized, a new construction process thought for garden construction is provided, and a certain reference value is achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a process flow chart of a construction method for green planting of abandoned mine pits provided by the embodiment of the invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Based on the construction difficulty and related problems of green planting of a large number of abandoned mine pits in the current stage, the invention provides a construction method for green planting of abandoned mine pits, and the construction method for green planting of abandoned mine pits is shown in figure 1 and has the following specific flow:

seedling type selection

The landform of the field sinks layer by layer from west to east, the water content of surface water is gradually increased, the light intensity is gradually reduced, the field is divided into three areas from west to east according to the humidity and light conditions, the area in the west side is low in humidity, is dry and strong in light; the middle area has moderate humidity, is influenced by the acrylic umbrella fabric, and has moderate light; the east side is the lowest part, the water content is large, water is accumulated for a long time, and the light is weak. According to the characteristics of different temperatures and different light rays, different seedlings are selected to build three habitats of drought, middle-aged and humid.

1. Dry habitat

The vegetation landscape simulating dry-land habitat simulation method is characterized in that the vegetation landscape simulating dry-land habitat simulation method enters from a main entrance of the vegetation garden to support a layer of vegetation landscape restored with a pit-bottom platform with certain texture, and the dry-land habitat simulation method simulates the dry-land habitat to build the vegetation landscape by utilizing the height difference of a field and combining an exposed wall and a stone setting. The dryland garden consists of a rock plant display area and forest belts on two sides.

In combination with a rock terrace in the field, selecting low creeping materials such as bush happiness, salacia, saxifrage, pink bamboo, sedum sarmentosum and dwarf sage, adding saline-alkali tolerant plants such as vitex negundo and the like as the characteristics, matching with dwarf woody plants such as fruit blue, azalea blunted leaves, sabina japonica, mahonia fortunei and pinus sylvestris and the like, arranging a lithospermum flower environment taking purple and yellow green as major keys, and embedding plant bubbles, rock stratum figurines to be reflected to natural plant stands to form interests, so as to create elegant and wild landscape atmosphere and show the natural beauty of the lithospermum.

2. Middle living environment

The method is positioned in the middle of a plant garden, various plants with different display themes are selected to be planted, the mesobiosis condition is simulated, the peculiar and exotic treasures in the nature are displayed, and the unique natural science popularization is realized while the interesting appreciation experience is created. Taking woad, eupatorium and red sage which are the genuine medicinal herb plants in the mountain Bao Hua and the Chinese magnoliavine fruit as special colors, and combining and configuring medicinal plants such as ardisia japonica, pinellia ternate, angelica dahurica, kadsura longepedunculata and the like to create a special display area with the theme of Shennong medicinal herb; the theme plant landscape with different fragrances is formed by combining fragrant wood and herbaceous plants such as sweet osmanthus, plum, michelia figo, gardenia, daphne, pepper wood, myrtle, rosemary and the like; planting typical endangered plants such as sinojackia xylocarpa, magnolia grandiflora, witch hazel, seven-seed flowers and the like in Nanjing places, ancient spermatorrhea plants such as Davidia involucrata, taxus chinensis var mairei, liriodendron, gingko and the like, matching ancient ferns and silver leaf herbal ground covers under forests, simulating the natural growth environment of plants, and showing the beauty of precipitation of the plants from ancient ways in a silent and remote scenic atmosphere.

3. Habitat for wet growth

The method utilizes water bodies, streams and sunken terrace lands in the field to plant aquatic, hygrophytic and pudendum bryopterins, herbaceous flowers and the like, and combines a fog spraying device to create a plant landscape atmosphere which is deep and silent and full of mysterious sense. Combining a still water surface and a terrace water drop landscape, planting aquatic hygrophytes such as lotus, water lily, sedum hyacinum, calamus, water bamboo and the like, combining tall and tall plants such as papyrus, and the like, creating landscape levels caused by staggering, and creating the aquatic hygrophyte landscape with stream flow at a time of till the stream is full of hours and green space is full of natural; according to the method, a shade flower environment consisting of ajuga decumbens, purple yam, bletilla striata, southern magnolia, wufeng grass, emerald green, hosta plantaginea, lycoris aurea and the like is displayed layer by layer in a field, bryophytes such as root-twisting moss, bottle gourd moss and golden hair moss and shade ferns such as nephrolepis, east China complex leaf auricularia, east elaeagnus fern, pteris multifida and adiantum capillus are planted in a centralized manner, and the moist plant landscape from deep forest to deep and quiet green onion is simulated.

(II) terrain modification

The conventional landscape is planted in a certain area, the illumination, the humidity and the landform are not changed greatly, the base layer is soft, the hydrophobicity is good, the requirement of the landform can be met through conventional terrain finishing, the project is located in a long and narrow pit, the illumination and the humidity are not local and uniform, the relief of the landform is large, the difficulty of the landform finishing is very large, the project scans the relation between the original cliff wall of the site and the structures and landscape in the site through three-dimensional scanning, the simulation is carried out on the landform and landform in the site by combining the BIM technology, the study is carried out on the landform, and the shaping of the site for the rectification is guided.

Basic unit's rock is the limestone layer in the pit, and the excavation degree of difficulty is big and the planting soil is maintained the topography degree of difficulty big, adopts concreting retaining wall and installation gabion wall form to do retaining wall, to the big region of retaining wall area, and the foundation stock is executed on the retaining wall basis (stock aperture 70mm, anchor length must not be less than 450 mm). The problem of the planting topography is maintained the degree of difficulty greatly is solved.

(III) treatment measure for accumulated water in pit

The east side in the pit is the lowest part of the topography of the plant garden and is in a bowl shape, underground water and surface water are collected after rainfall, the project utilizes the characteristics of the humid habitat, a waterscape water tank is additionally arranged to be connected with a finished granite water flowing groove, the finished granite water flowing groove flows into a pit bottom water tank from the top of the pit, a water circulating system is realized through a high-pressure water pump, the yin-loving plants are planted in combination with the aquatic plants, flowing water on the cliff wall is reasonably utilized to form an important component of the humid habitat, and surplus water is used for improving the planting environment of other habitats.

(IV) planting the nursery stock

1. Nursery stock transportation

1) The root system of the tree is guaranteed when the tree is loaded, transported, unloaded and temporarily planted, the soil ball is intact, the main tip and branch of the tree are not required to be broken, the bark is not required to be abraded, the nursery stock is planted immediately after unloading, and therefore the nursery stock which cannot be planted immediately is buried in soil and temporarily planted to protect the root system.

2) In order to ensure the planting effect, the transplanting large-size nursery stocks with crowns must be provided with soil balls. When the seedlings are lifted, the operations must be strictly carried out according to regulations and specifications, and the load tonnage of the crane is larger than the total weight of the soil balls and the tree body. When loading, the soil ball (wooden box) is forward, the tree crown is backward, and the soil ball is complete and is not scattered. The transportation keeps the tree stable without rolling and damaging the bark and the main branch.

3) Before transporting and loading seedlings, escort personnel check the solid hanging plate carefully according to the required tree species, specification, quality and quantity and then load the seedling. The roots of the nursery stocks with longer transport distance are covered by a straw mat or a wet grass bag so as to avoid the influence of air drying on survival.

4) And unloading the seedlings according to the designated positions after the seedlings are transported to a construction site, unloading the seedlings from top to bottom in sequence without taking the seedlings out from the bottom in disorder, slightly taking the seedlings when unloading, and not allowing the seedlings to be pushed down to avoid smashing roots and branches. The seedling with the soil unloading ball being less than 40cm can be directly moved down, but the trunk of the tree is not only lifted when the seedling with the soil unloading ball is moved, and the tree body and the soil ball are protected from being damaged.

5) When the seedlings cannot be planted immediately after unloading, the roots of the seedlings are temporarily buried or tightly covered by tarpaulin grass bags, temporary planting ditches with the width of 1.5-2m and the depth of 40cm can be dug in advance, the seedlings are stacked in order, the roots of the seedlings are buried layer by layer, if the temporary planting time exceeds more than seven days, a proper amount of water is added to keep the soil moist, the seedlings with soil balls are temporarily planted, the trees are erected as intensively, the soil balls are padded stably, if the temporary planting time is longer, water is frequently sprayed on the soil balls and branches and leaves to increase the humidity in the air and keep the soil moisture of the soil balls, but the water quantity is not too large so as to avoid that the soil balls are deformed to affect survival when the soil balls are soaked soft and then transported.

2. Seedling planting

Planting process

Base course processing → planting soil improvement → green terrain fine and tidy → line laying → digging planting hole → arbor lifting → arbor in place → pruning → backfilling → cofferdam → tree support → watering → bark covering → cleaning

Before the nursery stock is planted, a rock base layer is cleaned, no sundries and garbage are guaranteed, 20cm of ceramsite is paved, soil worker cloth is paved, and a drain pipe is arranged in the soil worker cloth to find a slope to the nearest rainwater well.

The method aims at three habitats of dryland, mesobiosis and hygrophyte in a plant garden, the required environments are different, and the dryland habitat is as follows: backfilling sandy soil 40cm above the backfilled planting soil (the mixed grass carbon ash nutrient soil and the organic soil); the method comprises the following steps: laying 30 centimeters of German imported nutrient soil (Langbo 0-20 puddles) above backfilled planting soil (mixed with the grass carbon ash nutrient soil and the organic soil); wet growth: backfilling planting soil (Mixed plant ash nutrient soil and organic soil)

3) Greening terrain neatness

1. The topographic requirements are that the slope curve of the whole topographic form is kept to be permeable and smooth, when the topographic form is piled up, construction is carried out from inside to outside according to lofting elevation, modeling and compacting are carried out, a topographic form framework is held all the time in the construction process, hardened soil is turned and loosened, and mechanical equipment cannot be used for construction on planting surface soil.

2. After the rough shaping of the micro-topography is finished, a covering surface layer is manually and finely made, the surface soil property is kept loose, and impurities are cleaned. When the artificial leveling is carried out, the slope surface is gradually folded from the edge to the middle, so that the curve and the smoothness of the whole terrain slope surface are smooth, and the water is permeated smoothly. The water content of the backfill soil is controlled to be about 23 percent, stones with the grain diameter exceeding 10cm are not allowed to be contained, the operation is stopped in rainy days, and the side slope is trimmed and compacted in time after rain. If the construction site has garbage, muck, construction garbage and the like to be cleaned.

3. The elevation of the field and the surrounding roads and squares must be reasonably connected to ensure that the green land is permeable and smooth.

4. The relation between the compaction degree of the soil and the design elevation is considered when the field is finished, and the compaction degree of the soil after compaction reaches more than 80 percent so as to avoid uneven field caused by severe water dripping after planting.

4) Pit excavation

The pit digging and grooving positions are accurate, the pit is determined according to root systems, soil ball sizes and soil quality conditions, and the pit digging and grooving needs to be straight up and straight down and barrel-shaped, so that the upper part and the lower part or the upper part and the lower part are not big, otherwise, the pit roots or the filled soil are not solid. The diameter of the pit can be 30-40cm according to the specified root system or soil ball diameter.

5) Hoisting and positioning

Influenced by acrylic ceilings, landscape steel trestles and construction sites, and the difficulty of material transportation and hoisting is high. The project simulates the environment in the field by three-dimensionally scanning the original cliff wall in the field and combining the BIM technology, compares and selects the hoisting scheme of the cliff wall, and selects the optimal plant hoisting scheme.

In order to protect the crowns, branches and trunks of trees, the trunks cannot be used as the supporting points for lifting, and the soil balls are fixed by using a lifting appliance. Meanwhile, in order to prevent the soil balls from deforming and damaging plants, a special iron chain and a hook system are adopted during hoisting, container pieces or steel wire meshes of the soil balls are hoisted, the trunk or branches cannot be damaged, and the seedling soil balls are slowly moved to the positions of the planting holes.

6) Support for supporting

After the nursery stock is planted, the nursery stock is immediately supported and bound, the crown part and the trunk part are supported and windproof by adopting a shoulder pole support, a triangular support or a four-corner support, and the supporting and binding are firm and uniform and attractive so as to prevent soil balls from moving and damaging the root system due to wind blowing and settlement.

(V) Nursery stock maintenance

The cliffs at two sides of the pit are steep, the temperature in summer is too high, the plant maintenance difficulty is high, the project is covered by a semi-closed acrylic water storage umbrella cover, the light transmittance is controlled to be 92%, and the temperature and the humidity are controlled on the basis of meeting the requirement of the plants on light; in addition, for the nursery stocks with higher environmental requirements, the survival rate of the nursery stocks is ensured by adding a greenhouse and arranging temperature and humidity control equipment.

1. Irrigation water

Watering immediately after the plants are planted in the day avoiding high temperature time. The nursery stock needs to be large with soil balls, and the water in the tree body is kept. While irrigating, the soil around the tree pit is stirred by an iron rod or a wood rod so as to fill the soil around the tree pit by the action of water. When irrigation is carried out, attention needs to be paid to not damage the soil cofferdam, the soil cofferdam needs to be filled with water, and the water is slowly soaked into the planting holes. To further increase the survival rate of the permanent planting, 0.03% auxin can be added into the water for irrigation so as to stimulate the growth of new roots. Proper amount of auxin is mixed into clear water to prepare a pouring liquid with the concentration of 200PPm, and the pouring liquid is used as first root fixing water for pouring. Later, the trunk needs to be sprayed with water and moisturized by a sprayer frequently.

According to the climate characteristics of Nanjing city, 3-6 months and 9-11 months are key periods for tree irrigation in order to ensure the normal growth of trees; for newly planted trees, the trees should be adequately irrigated in time within five consecutive years, the soil quality and water retention are poor, or the roots of the trees grow slowly, so that the irrigation period can be prolonged properly. The watering tree weir ensures that water does not run and leak, is not lower than 10cm, the diameter of the tree weir with the paved land is based on the reserved pool, the land without paving is not needed, and the diameter of the trunk breast diameter is 10 times as the standard for the arbor.

Irrigating in summer in every three days as a period, and the water consumption is 2m ³ Can irrigate 3-4 arbor plants or shrub plants 40-60m ² Or lawn 50-70m ² (ii) a The water consumption in winter is properly reduced.

The estimated early summer is that the volume of 9-12 vehicles is 10m for maintaining the water for greening area of ten thousand square meters per 3 days ³ The sprinkler of (1); the water consumption is properly reduced in winter.

2. Pruning (pruning)

Different measures are taken for different tree species according to the growth habit, the flowering and fruiting habit of the trees during winter pruning or summer pruning. The pruning tool must be ground fast, and the operation can be participated in after adjusting, and used machinery and vehicle are examined earlier and are hidden danger free and can be used.

The lawn trimming cycle is once in 5-10 days in summer (5-10 months), and once in 15-20 days in winter; the average pruning period of the shrubs is 3-5 times for one year; the average period of arbor pruning is once a year.

3. Fertilizing

The fertilizer is applied to increase soil nutrients, improve soil structure, increase soil moisture and supplement certain elements so as to achieve the purpose of enhancing tree vigor, and water should be added in time after the fertilizer is applied to the soil. The fertilizer application comprises base fertilizer and additional fertilizer:

the base fertilizer is applied after the leaves of the trees fall and before the trees germinate. No matter hole application, ring application and radiation furrow application, the fermented and decomposed organic fertilizer is applied and mixed with soil uniformly and then applied to the soil, and the fertilizing amount is determined according to the size of trees and the type of the fertilizer.

The top dressing method, whether root application or external application, uses accurate amount of chemical fertilizer, and the top dressing method is uniform in crushing and spreading or is buried in soil after being mixed with the soil.

4. Weeding

In order to keep the greening plane clean, avoid the competition of fertilizer and water between weeds and trees and reduce the breeding conditions of diseases and pests, the method is carried out on wild weeds continuously according to the principle of removing small weeds and early weeds.

5. Flood prevention

When the rainy season comes in summer, the flood prevention work needs to be prepared in advance, and the works of draining waterlogging, discharging flood, straightening and the like of the plants are well done. The daily on-duty personnel of the project department are responsible for collecting weather forecast on the day, doing on-duty and weather recording and work of switching over, and quickly returning flood prevention teams once dangerous situations occur so as to timely and organically perform flood prevention.

Treating the topographic water: according to the general construction plan, the drainage direction is determined by utilizing the natural terrain, a drainage pit is dug by an excavator according to a specified gradient, a gasoline pump is used for pumping water and discharging, and the excavator is used for dredging cofferdams so as to ensure smooth drainage of a construction site.

And (4) draining stagnant water and dredging nursery stocks. After drainage, the trees must be timely straightened and straightened, floaters such as weeds, fallen leaves, impurities and the like accumulated around the trees are removed as soon as possible, lodging and dead plants in the green land are cleaned, and arbor and shrub in the green land are comprehensively straightened and pruned at one time. And the seedling washing treatment is carried out in time, so that seedling leaf falling, pest and disease outbreak and growth inhibition are prevented.

And (4) carrying out specific measures of drainage and waterlogging prevention on the large trees in the flood season. A drainage ditch is arranged: drainage ditches need to be dug in land with poor drainage facilities, particularly, ginkgo trees are the most important, and the ginkgo trees are afraid of water flooding to cause rotten roots; timely dredging: accumulated water in the green land is drained in time, so that the nursery stocks are prevented from waterlogging; timely cleaning: and (4) cleaning dead trees, dangerous trees, dead branches and broken branches in the district in time.

6. Greenfield maintenance

Sanitary toiletSweeping, keeping clean, and packing in pieces and dry if necessary, and the special person is responsible for; the green land facility is maintained regularly and is kept in good condition; the education contents of propagandizing and maintaining trees, flowers and plants and public facilities are enhanced. Expected to realize 1 person and 1 day maintenance of 4000-5000m ² 。

7. Winter conservation of precious nursery stock

After the temperature is lowered to-5 ℃ in winter, heat preservation treatment is carried out on the precious nursery stocks with poor outdoor cold resistance on site, and the specific measures are as follows: the heat preservation shed is erected, the blower is additionally arranged on the vertical surface, and the hot air is used for preserving heat.

The invention has the advantages that the drainage system of ceramsite, geotextile and drainage pipe is directly added on the rock base layer, so that the problem that the surface water is easily accumulated in the ash rock layer in the abandoned mine pit is solved, the rotten root and the rot of the plant are avoided, and the survival rate of the plant is effectively improved; the landscape retaining wall is constructed, so that earth and stone excavation is reduced, energy consumption pollution is reduced, and dust and noise pollution is reduced; the semi-closed acrylic water storage umbrella cover is added for covering, and the light transmittance is controlled to be 92 percent, so that the temperature and the humidity are controlled on the basis of meeting the requirements of plants on light; the running water on the cliff wall is collected by utilizing the original topographic relief, so that the cliff can be used for displaying the landscape of the water pool and storing the running water for irrigation, and the problem of rainfall and water accumulation is solved; calculating the sunshine time of the plants in the pits, simulating the sunshine duration of the plants in each area, reasonably planting the plant varieties in each area corresponding to the sunshine duration, and culturing and planting the plants with high requirements on temperature and sunshine by utilizing the heat storage performance of the acrylic roof; and (4) guiding field construction by combining three-dimensional scanning of the original terrain with BIM technical scheme comparison. The ecological restoration method realizes the green planting ecological restoration of the abandoned mine pit, provides a new construction process thought for garden construction, and has certain reference value.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.

Claims (8)

1. The construction method for green planting of the abandoned mine pit is characterized by comprising the following steps:

dividing the pit into three areas from high to low in sequence, selecting different planted seedlings according to humidity and light conditions, and constructing a dry habitat, a middle habitat and a wet habitat;

simulating the topography and landform in the field by three-dimensionally scanning the relationship between the original cliff wall and structures in the field and the landscape and combining the BIM technology to trim the planting topography;

the wet habitat is in a bowl-shaped pit body, a waterscape water pool is additionally arranged on the wet habitat to be connected with a finished granite water flowing groove, the finished granite water flowing groove flows into a pit bottom water pool from the pit top, and then the finished granite water flowing groove is connected with the dry habitat and the medium habitat through a high-pressure water pump, so that a water circulating system is realized, flowing water on the cliff wall is utilized, and surplus water is used for the transformation of the planting environment of the dry habitat and the medium habitat;

transporting different nursery stocks to corresponding dry habitat, middle habitat and wet habitat for nursery stock planting;

and covering the nursery stock with a semi-closed acrylic water storage umbrella surface to perform nursery stock maintenance.

2. The abandoned mine pit green planting construction method as claimed in claim 1, wherein the dry habitat enters from a main entrance of the mine pit and is connected with a pit bottom platform, the dry habitat utilizes the height difference of the field, and the exposed wall and the stone placement are combined, gravel is laid, and the dry habitat is simulated to carry out plant landscape construction.

3. The abandoned mine pit green planting construction method according to the claim 1, wherein the mesobiosis is located in the middle of the mine pit, and a plurality of plants with different display themes are selected for planting to simulate the mesobiosis conditions.

4. The abandoned mine pit green planting construction method according to the claim 1, wherein the hygrophyte uses water, stream drop and sinking platform in the field to plant aquatic, hygrophyte, and Yin-born moss, ferns and herbaceous flowers.

5. The method for green planting construction of abandoned mine pits according to claim 1, wherein in the step of planting terrain dressing, retaining walls are made in the form of concrete pouring retaining walls and gabion walls, and foundation anchor rods are made on the basis of the retaining walls.

6. The green planting construction method for the abandoned mine pit according to claim 1, characterized in that in the step of planting the nursery stock, according to the terrain requirement, the rough shaping of the micro-terrain and the artificial fine making of the covering surface layer are carried out, the loose soil quality of the surface is kept, and the sundries are cleaned.

7. The green planting construction method for the abandoned mine pit according to claim 1, wherein after the nursery stock is planted, the nursery stock is supported and bound, and a shoulder pole support, a triangular support or a four-corner support is adopted to support a crown part and a trunk part to prevent wind.

8. The abandoned mine pit green planting construction method according to claim 1, wherein in the step of maintaining the nursery stock covered by the semi-closed acrylic water storage umbrella cover, the light transmittance is controlled at 92%, the temperature and the humidity are controlled on the basis of meeting the requirement of the plant on light, and the survival rate of the nursery stock is ensured by adding a greenhouse and arranging a temperature and humidity control device.

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