557results about How to "Improve water storage capacity" patented technology

The invention discloses a process for preparing a liquid seaweed fertilizer through enzymolysis and fermentation. The process disclosed by the invention can be used for generating a large quantity of soil beneficial bacteria and multiple special-effect metabolites by degrading macromolecular substances which are contained in seaweeds and difficult to utilize into micromolecular polysaccharide, monosaccharide and a nitrogen-containing compound in compound enzymolysis and multi-strain co-fermentation modes, thereby enhancing the biological activity of a seaweed fertilizer, preventing the destruction of strong base, high temperature and high pressure in the production process of the seaweed fertilizer and completely retaining abundant nutrient substances contained in the seaweeds. According to the process, the content of a product, namely alginic acid, is 40-60 g / L and is increased by more than 30% compared with that prepared from an enzymolysis method, an alkaline hydrolysis method, an acid hydrolysis method and a simple microbe fermentation method, and the effective viable count is more than or equal to 2 billion / mL; the product integrates natural nutrient components, antibiotic substances and plant hormones, combines the efficacy of three fertilizers, namely an organic fertilizer, a microbe fertilizer and a trace element fertilizer and has a wide application prospect.

The invention relates to a semi-flexible structure permeable street and a pavement method thereof. The structure of the street comprises a fully-permeable multilayer pavement structure roadbed or a drainage multilayer pavement structure roadbed, a permeable grid plate cushion paved on the roadbed, and a street surface layer paved on the permeable grid plate cushion. By paving the permeable cushion formed by the linked pavement of permeable grid plates on the fully-permeable multilayer pavement structure roadbed or the drainage multilayer pavement structure roadbed, the semi-flexible structure permeable street which is constructed on condition that the permeable grid plate structure is reasonably designed, the manufacturing material of the permeable grid plate cushion is reasonably selected and the unit structure of the street surface layer is reasonably designed has the advantages of good permeability and strong water storage capability, and the surface layer and the permeable grid plate cushion of the street have a good combination degree and are easy to disassemble, replace and maintain.

The invention belongs to the technical field of environmental protection and ecological engineering, relates to topological micro-reformation and vegetation restoration, and discloses a vegetation restoration method applicable to degraded plateau and lake wetlands. The vegetation restoration method is low in personnel and capital investment and mainly includes stages of background evaluation, selective enclosure and livestock reduction, topological micro-reformation for the wetlands and construction of screened plant communities or plant zones. The vegetation restoration method has the advantages that plateau wetland vegetation restoration is accelerated, wetland vegetation ecosystems are constructed, and the environmental quality of the degraded wetlands is improved.

The invention belongs to the technical field of the mechanized remediation of grasslands, and relates to a combined remediation method for deteriorated grasslands and a special grassland operating machine. The method comprises the following steps of: cutting roots of grass on the grasslands to be remediated, and loosening soil underground and forming seed furrows and fertilizer furrows in the soil along cutting joints; sowing and fertilizing alternately, and applying seeds and fertilizers into the corresponding furrows; and compacting the furrows. The special grassland operating machine comprises a cutting assembly, a vibratory soil loosening and furrowing assembly, a seed and fertilizing applying assembly, a compaction assembly and a depth limit assembly. By the combined remediation method and the special grassland operating machine, the root cutting, vibratory soil loosening and furrowing, sowing, fertilizer application and compaction are combined, and multiple remediation modes are combined, so the combined remediation method and the special grassland operating machine are suitable for the sowing for fertilizer application and fertilizing for resowing in the process of remediating the deteriorated grasslands with high compactness and are also applicable to farmlands with poor soil texture, and can better remediate grasslands deteriorated naturally or due to man factor.

The invention provides a processing method for an animal and plant tin, relating to a preparation method for healthcare food, which is characterized in that, the mixture of meat emulsion, the selected vegetable mud, edible gelatin and konjak gel is stirred into an organic whole under vacuumizing condition, thus ensuring rich nutrient contents of the tin; in addition, along with the addition of different varieties of vegetable, the compound animal and plant tins with different varieties and flavors can be processed to meet the shopping requirements of consumers. The method has the beneficial effect that, the produced product has general equilibrium, obviously improved level of protein compared with singular animal tallow. The combination of the praline and hydroxyproline in the collagen with the water in human skin can improve the water storage capability of the cell tissues with low water storage, improve the contents of the cell tissues, bringing delicateness and whiteness to human skin, reducing wrinkles, delaying senility, strengthening the elasticity of the blood vessel, and preventing cardiovascular diseases. Therefore the product is an ideal healthcare product for everybody to be beautiful and thin.

A method for spraying to green a side slope of hard rock with joints being not developed comprises the steps of processing a slope surface, setting up a simple scaffold, using a compressed air drilling machine for drilling vegetative holes, filling nutrient soil in the vegetative holes, laying a metal net and binding vegetative strips, spraying and seeding matrix materials which can instantly make artificial soil with good water stability performance in the slope surface, and conducting necessary maintaining management in the seedling stage of plants. The method is a spray-seeding technology directing at the side slope of the hard rock with the joints being not developed, and common construction methods can not be implemented on the slope surface of the type. The method for spraying to green the side slope of the hard rock with the joints being not developed has the advantages of being simple, strong in operability, low in cost and suitable for various hard rock side slopes with the gradient less than 80 degrees. After spray-seeding, phytocoenosium is formed, wherein ligneous plants are mainly included, shrub and herbaceous plants are combined, the phytocoenosium is long lasting and stable, and is in harmony and consistency with the surrounding ecological environment, after closing of the plants, cultivating does not need any more, and the slope surface of the hard rock with the joints being not developed can be greened and beautified permanently.

The invention provides application of temperature-sensitive hydrogel in improvement of the anti-dry-shrinkage cracking property of concrete. The concrete is prepared from the temperature-sensitive hydrogel, cement, aggregates and water. A preparation method of the concrete comprises the steps that firstly, the temperature-sensitive hydrogel is prepared; secondly, the aggregates and the water are blended to be uniform; lastly, the temperature-sensitive hydrogel and the water are added, the materials are blended to be uniform, and then the concrete can be prepared. The adopted homemade temperature-sensitive hydrogel is lightly-crosslinked macromolecules which can be polymerized to form a film after releasing water, no hole can be reserved in the cement concrete, and other properties of the cement concrete are not affected while the anti-cracking property of the concrete is improved. The initial volume water content of the concrete is increased along with increasing of the mixing amount of the temperature-sensitive hydrogel, and it is shown that the water storage capacity of the concrete is enhanced by mixing the temperature-sensitive hydrogel; the water absorption rate of the concrete is decreased along with increasing of the mixing amount of the temperature-sensitive hydrogel, and it is shown that the connectivity of capillary pores in the concrete is reduced by mixing the temperature-sensitive hydrogel.

The present invention relates to a composite material with plane nutrient action and structure strength and its technological process. Said composite material comprises 40-60% of peat, 10-30% of solidifying agent, 10-30% of adsorbing agent, 5-10% of nutrient additive and 0-1% of other additive. The composite material can be press-formed in the field, the seeds can be filled and then the formed composite material with seeds can be laid for use of can be stored for stand-by. Said composite material can be made into slurry material, and applied on the surface of various mouldings, then the seedscan be filled into the surface to make stereoscopic greening. Said ivnention possesses extensive application.

The invention provides an abrupt slope spray-seeding greening method. The method comprises the following steps of clearing away loose stones and impurities on the surface of a slope; embedding grouting anchors in the abrupt slope, grouting for anchoring, inserting common anchors, and fixing by using reinforced belts; laying a geogrid, namely horizontally and longitudinally laying porous water pipes on the geogrid in a staggered way and laying an inverted filter on the geogrid and the porous water pipe until the inverted filter covers the porous water pipe; spraying a matrix and a seed mixture onto the inverted filter, or planting seedlings of plants in a matrix; laying a plant fiber net on the matrix and fixing by using a rattan net; laying a nonwoven geotextile on the rattan net; performing maintenance on plants, watering in an initial stage, performing drip irrigation in a later period, and removing the geotextile after the plants survive. According to the method, water and soil loss of the slope can be effectively prevented, the water-holding capacity of the laid green belt is high, the green belt is subjected to drip irrigation to save water resource, the slope can be greened in a short time, and the restored slope has a good greening effect and is stable in structure.

A combined cultivation method for water and soil conservation for sloping farmlands relates to cultivation methods for water and soil conservation and solves the problem that using the single cultivation technique for holding water is unsatisfactorily effective. The combined cultivation method includes: firstly, adjusting ridges of sloping farmlands on downward slopes and inclined slopes under ridge plowing adjusted into transverse slope ridges, and adopting contour farming and belt planting; secondly, building ridges, and planting protective plant belts on the ridges; thirdly, subsoiling forfarming; fourthly, performing furrow damming; and fifthly, performing no-tillage conservation tillage. Furrow subsoiling and furrow damming are technically combined and integrated according to soil and weather characteristics of a black soil area, so that water and soil loss is reduced or avoided for sloping farmlands to the greatest extent, water and soil are conserved, water utilization rate isincreased, and crop yield is increased evidently. By the method, soil saturation and infiltration speed ratio is increased by 24.1% in processing treatment, water utilization rate is increased by more than 15%, crop yield is 30kg per mu, and 100 Yuan per mu is increased..

The invention provides a cleaning robot. The cleaning robot is internally provided with a water tank; meanwhile, the inner part of the water tank is separated into a clean water tank and a sewage tank through a deformable separation part; the deformable separation part can be deformed very well, so that clean water and sewage can be effectively and sufficiently separated when the deformable separation part is arranged between the clean water tank and the sewage tank, and the clean water tank and the sewage tank can share an inner space; under the condition that the shape and the size of the water tank are limited, water storage capabilities of the clean water tank and the sewage tank are greatly improved, so that the cleaning robot can clean a larger ground area through one time of water storage.

The invention relates to a maize straw three-dimensional returning machine which mainly comprises a front frame, a rear frame, a straw picking device, a straw feeding device, a straw crusher, a stubble cleaning mechanism, a straw deep placement device, a hydraulic control depth-limiting mechanism, a front motor, a rear motor, a hydraulic control system assembly and the like. The straw picking device is assembled at the front end of the front frame, the straw feeding device is assembled on the front part of the front frame, the straw crusher is assembled in the rear part of the front frame, the stubble cleaning mechanism is assembled below the front part of the rear frame, the straw deep placement device is assembled in the middle part of the rear frame, the hydraulic control depth-limiting mechanism is assembled in the rear part of the rear frame, the front motor is arranged on the front frame, the rear motor is arranged on the rear frame, and power is provided to the pre-posed motor and the post-posed motor by a hydraulic output system of a tractor. The maize straw three-dimensional returning machine during work is pulled by the tractor, and picks, crushes and deeply places the maize straws in a field as the tractor moves and meanwhile cleans stubbles, so that operations of ground mulching return to field, reclaimed soil return to field and soil deep placement return to field on the maize straws are realized.

The invention relates to an active carbon preparing method by adopting walnut shell as raw material and an application of the active carbon. The walnut shell is adopted as the raw material. The active carbon is prepared by adoption of a vacuum pyrolysis method through steps of smashing, drying, charring, puffing for activation, cooling, discharging, sieving, and the like. The obtained active carbon is applied as a microbial fertilizer carrier. The preparing method and the application are advantaged by: short production period, low reaction temperature, low production cost, low energy consumption, no pollution to the environment, and capability of improving the soil granular structure, reducing soil hardening, enhancing the water retention property of the soil, playing a role of nitrogen-fixation controlled release fertilizers, and reducing the using amount of fertilizers and decomposed crop straw when the active carbon is applied as a microbial fertilizer carrier and used in the agriculture.

The invention relates to a leaf vegetable organic fertilizer and a preparation method thereof. The preparation method comprises the steps of grinding maize straws, wheat straws, soybean straws and sesame straws into straw particles according to a mass ratio of 3:3:2:2, pretreating the straw particles by adding water and ammonium hydroxide to obtain a mixture A; carrying out ultraviolet ray treatment on the taken duck manure and duck feathers, and then carrying out ozone treatment, thus obtaining a mixture B; adding aspergillus niger and saccharomycetes into a mixture of grinded manioc wastes, grinded kelp wastes and water, and fermenting to obtain a mixture C; mixing the mixtures A, B and C, shell powder, plant ash and sodium humate, and adding EM (Effective Microorganism) for fermentation to obtain a mixture D; and adding bone meal and charcoal dust into the mixture D, then carrying out ozone sterilization, drying, charging in a separating manner, and carrying out ultraviolet sterilization to obtain the leaf vegetable organic fertilizer. The prepared leaf vegetable organic fertilizer contains various nutritional ingredients needed by the growth of leaf vegetables, regulates soil, activates the activity of microorganisms in the soil, overcomes soil hardening, and improves the permeability of soil air.

The invention relates to an organic biological multi-element plant nutrient polymer and a production method thereof and belongs to the field of agriculture. Multiple plant nutrients dispersed in agricultural solid waste are quickly gathered through an organic biological fermentation technology; due to industrial processing, nutrient bodies or nutrient blocks are prepared, so that a supporting solid and a nutrient supplier are supplied to cultivation of plants. According to the organic biological multi-element plant nutrient polymer and the production method thereof, the included plant nutrient elements are gathered together through a technical measure of organic biological fermentation and decomposition of the agricultural solid waste and are used for development of ecological agriculture and recycling agriculture; therefore, the environment pollution is solved, and the scientific support is supplied to the construction of beautiful countries.

The invention discloses the technical field of fruit tree planting and provides a planting method of cherry trees. According to planting treatment, fruit pits are taken out, and airing is performed to obtain seeds; 8-12-fold damp sand are mixed with the seeds, and the mixture is refrigerated in a refrigerator under the temperature of 0 DEG C; the mixture is placed into a 1:40-1:60 pig manure compost leaching solution and a gibberellin mixing solution with the concentration of 5% to be soaked, the soaking time is 5-10 min, the seeds are taken out after soaking is finished and sown in a seedling basket, a matrix with the ratio of turfy soil to river sand being 1:1 is adopted, and germination is accelerated under the room temperature; germination acceleration is stopped after radicles extrude seed coats and the length of the seeds is 1-3 times during seed germination, the germinated seeds are taken out and the seed coats are soaked into rooting powder. On the basis of seed sand storage freezing treatment, seed dormancy is broken through, the germination rate is effectively increased through soaking in the pig manure compost leaching solution and the gibberellin mixing solution, the seed germination rate is improved to 90% or above, the number and length of seed roots are effectively increased, the problem that a root system is shallow is avoided, and the rooting rate can be further increased through the rooting powder soaking solution.

The invention discloses a cutting propagation method for kadsura coccinea. The cutting propagation method comprises the following steps: sand bed preparation: mixing river sand, vermiculite and plant ash to form a mixed matrix according to the volume ratio of 4:3:1 and establishing a sand bed; cutting slips preparation: selecting annual semi-ripe branches with complete laminas and full leaf buds and without diseases or insect pests in the initial stage or middle stage of plants of the kadsura coccinea, obliquely cutting off lower notches of the branches and flatly cutting off upper notches of the branches to obtain stems with 1-2 laminas at lower ends, and taking the stems of which each section has a corresponding leaf as a cutting slip; cutting slip pretreatment: soaking the cutting slips in a rooting agent aqueous solution for 10-30 minutes; and cutting: cutting the cutting slips on the sand bed, wherein line spacings are 10-14 cm, plant spacings are 3-4 cm, the lengths of parts, which are inserted in the sand bed, of the cutting slips are 3-5 cm, and cutting is carried out at 6 pm to 8 pm from the end of May to the beginning of July. The cutting propagation method disclosed by the invention has the advantages of high rooting rate, high seedling rate, short cultivation time and the like.

The invention discloses a method for enabling a pavement to have strong rainwater storage capacity and reducing rainwater loss. The method is implemented through combination of a percolation pipeline, a permeable pavement, permeable ditches and various technologies including soil infiltration and specifically comprises the following steps: medium sand, bottom rubble, geotextile and the percolation pipeline are laid sequentially at the bottom of a trench below the pavement, the geotextile is folded and performs tight and compact wrapping, the pipeline is completely wrapped with the geotextile, two ends of the percolation pipeline are connected with catchpits respectively, and then rubble around the pipeline, the permeable pavement and surface layer soil are laid sequentially; the ditches are dug in two sides of the permeable pavement, and water absorptive plants are planted. The method has the advantages that through combination of various infiltration technologies, a multipoint rainwater infiltration technology for a sponge city is realized, urban rainwater is drained timely, urban waterlogging is reduced, the urban pavement has strong rainwater storage capacity, and rainwater loss is reduced.

The invention provides flower culture soil and a preparation method thereof. The flower culture soil comprises, by weight, 14-16 parts of straw, 11-13 parts of corn cob, 7-9 parts of sorghum husk, 7-9 parts of sawdust, 6-8 parts of Tenebrio molitor excrement, 4-6 parts of perlite, 4-6 parts of medical stone, 2-5 parts of water-retaining agent, 10-49 parts of pig manure, 3-6 parts of beer yeast paste, 30-65 parts of carbon powder and 0.2-0.5 part of compatibilizer. The flower culture soil has the advantages that flowers cultured by the culture soil are high in survival rate and low in disease and pest probability, and biological chains can fast form in the culture soil. The preparation method is simple and easy to achieve batch production.

The invention discloses a tailing pond reclamation greening method. The tailing pond reclamation greening method includes: selecting mine waste tailings and adding modifying agents of peat soil and sawdust to modify the tailings, wherein the volume proportion of the base materials of the tailings, the peat soil and the sawdust is 2-4:0.8-1.2:0.8-1.2, 20g / m<2>-30g / m<2> of water retaining agents are added in the base materials, and reclamation greening operation is performed on mine waste land by using the base materials. Accordingly, not only are good ecological reclamation greening effects achieved, but also accumulation quantity of the tailings in a mine and harm from the tailings to mine ecological environment are effectively reduced, and furthermore soil is not used in the base materials, and therefore the disadvantage that secondary damage is caused to the environment due to the fact that replacement soil is used as growth base material of plants in a traditional replacement soil spraying greening method is avoided.

The invention discloses a collection, filtration, purification and storage system for water, which comprises a water collection and filtration system and a water purification and storage system, wherein the water collection and filtration system comprises a collector-shoe gear, a filtration and stream guidance device and a stream guidance pipeline connected with the collector-shoe gear and the filtration and stream guidance device; and the water purification and storage system is communicated with the filtration and stream guidance device through a water transmission pipeline extending from the filtration and stream guidance device to enable water output by the filtration and stream guidance device to be stored by flowing into the water purification and storage system through the water transmission pipeline. The system can be applied to the collection, filtration and storage of runoff rainwater on hillside and road as well as in farm and yard, lake water and river water. The collection, filtration, purification and storage system for the water can carry out multiple prefiltration and predeposition on the water source, remove large floating matters and small solid suspended particulate matters in water flow, and enable the water moving into the water purification and storage system to have better water quality after the pretreatments.

The invention belongs to the technical field of agricultural machines, in particular to a soil-dropping vibrating ripper in situ which is used by matching a tractor. A soil-dropping vibrating ripper in situ comprises a gearbox (1) and a stander (2), and is characterized in that the cutting system of a cutting disc (5) and an operational shovel component which comprises an operational shovel (8) are respectively fixed on a falsework (10), and the cutting system is arranged at the front of the operational shovel component; a vibrating system comprises an eccentric shaft connecting rod component (12) fixed on the stander (2); the frond end of the falsework (10) is fixed on the stander (2) by a pin roll (3), and the rear end of the falsework (10) is connected with the eccentric shaft connecting rod component (12); the gearbox (1) is connected with the vibrating system through a main transmission shaft for distributing power to the eccentric shaft connecting rod component (12); a soil-rolling adjusting system comprises a supporting wheel (4) fixed on the stander (2)and a soil-rolling wheel (11).

The invention relates to a fireproof, moisture-resistant and high-tenacity gel paper and a method for preparing the gel paper. Raw materials of the gel paper comprise, by mass, 9-15% of monomers with double bonds, 1-3% of linear polymers, composite cross-linking agents accounting for 5-20% of the monomers with the double bonds, 0-1% of additives, 1-5%o of antibacterial substances and 0-2% of reinforcing substances. M1 reacts with M2 in a water solution under the action of the composite cross-linking agents, forming is carried out through molds and heat treatments are carried out to prepare the fireproof, moisture-resistant and high-tenacity gel paper. The gel paper prepared according to the method has high strength and tenacity and good high temperature resisting performance, fire resisting performance and moisture resisting performance, is good in restorability, and can meet writing and preserving requirements under conditions like high temperatures and different humidity. The fireproof, moisture-resistant and high-tenacity gel paper and the method for preparing the gel paper are suitable for fields like packaging, paper making and printing.

The invention discloses a seedling raising device with direct use and making and use methods thereof. The seedling raising device comprises a seedling raising matrix, the seedling raising matrix is internally wrapped with seeds, and the seedling matrix containing seeds is placed in a disposable seedling raising plate. In the invention, seeds are wrapped in the seedling raising matrix, and the seedling raising matrix containing seeds is placed in a disposable seedling raising plate, when in use the seedling raising plate is directly placed into a seedling raising tank, thus not only simplifying operation process of seedling raising and reducing labor cost but also greatly improving planting efficiency; and the seedling raising plate filled with seedling raising matrix containing seeds is made by professional personnel in batch, thus providing technical support for seed growth.

The invention relates to a vibrating mechanism for a vibrating subsoiler. The vibrating mechanism is characterized by comprising an eccentric shaft, a cross-shaped shaft coupling, a lever and sub-soiling shovels; one end of the eccentric shaft is a hexagonus spline shaft end, the other end is an eccentric shaft end, and the eccentric shaft is a cantilever shaft formed by being supported by two bearing seats; the spline shaft end of the eccentric shaft is connected with the power output shaft of a tractor through the shaft coupling, and the eccentric shaft end of the eccentric shaft is articulated with the cross-shaped shaft coupling through a bearing and a clip spring; the lower end of the cross-shaped shaft coupling is hinged at one end of the lever, a pair of overhanging arms is arranged at the other end of the lever, and the sub-soiling shovels are vertically fixed on the pair of the overhanging arms. Due to the adoption of the lever principle, the penetration angles of the sub-soiling shovels are changeable, so that the sub-soiling shovels penetrate through the soil more easily, the resistance of the soil to the shovel surfaces is reduced, and the tractive resistance of the vibrating subsoiler is further reduced. The invention is widely applied to various vibrating subsoilers.

The invention discloses a method of cultivating rice by layer construction and utilization of straw and soil and solves the problems of crop stalk returning, soil aeration and water-fertilizer coupling. The method includes the steps of 1, performing a bed-furrow project on a rice field for the whole year; 2, performing moisture management before each season of crop harvesting; 3, treating stalks of crops of each season; 4, clearing beds and furrows and spreading soil; 5, planting crops; 6, performing field management; 7, harvesting the crops. The method has the advantages that the soil arable layer structure is changed, and a mud layer, a straw layer and a soil layer are formed from top to bottom; the method is good for deeply placing chemical fertilizers and improving availability of the fertilizers; water content of bed soil is decreased, soil aeration is improved, and availability of natural rainfall is improved; the rice field production process is free of tillage, straw burning and field steeping, ecological benefits are significant, operational energy consumption is reduced, haze is decreased, and irrigation water is decreased.

The invention discloses a tree pool device with rainwater infiltration, storage and purification functions.According to the tree pool device, a pretreatment water tank (8) located below a rainwater perforated strainer (9) at the edge of a locomotive pavement and a collecting water tank (4) located below a pedestrian pavement are installed in a substrate layer (15), overflow holes (12) communicated with the substrate layer are formed in the upper portion of the pretreatment water tank (8), slow infiltration holes (14) are formed in the lower portion of the pretreatment water tank (8), and the top of the pretreatment water tank (8) is further provided with an overflow pipe (10) communicated with a municipal rainwater pipe (18); the bottom of the collecting water tank (4) is communicated with a perforated pipe (3), and a drainage pipe (6) is installed on the side wall of the collecting water tank (4) and communicated with the municipal rainwater pipe (18) laid in an original soil layer (17).The tree pool device with the rainwater infiltration, storage and purification functions has the advantages that the water infiltration and water storage capacities of a tree pool are enhanced, the function of drainage after purification is achieved, the runoff peak value is delayed and reduced, the runoff volume is reduced, and the requirements of vegetation maintenance and subsequent rainwater reuse are met.

The invention discloses a soil reparation method, and belongs to the field of soil reparation. The method comprises the following steps: preparing a soil reparation agent comprising the following components in percentage by weight: 30-40% of pulverized coal ash, 2%-5% of a water absorbent and the balance of urban sludge, mixing the soil reparation agent with polluted soil, standing at the temperature higher than 0 DEG C for 60-80 hours so as to enable the water content of the polluted soil of the soil reparation agent to be 30-40% and enable the pH value to be greater than 7, thereby repairing the polluted soil. Urban sludge can supply a great amount of organic substances and nutritional ingredients for the polluted soil, and the fertility of polluted soil is improved; the pulverized coal ash after absorbing water and being pulverized not only can eliminate pathogenic bacteria in urban sludge and perform innocent treatment, but also can loosen the polluted soil, and the water-holding capacity of the polluted soil can be improved. According to the invention, the urban sludge and pulverized coal ash are utilized resourcefully, not only is the pollution of urban sludge and pulverized coal ash to the environment reduced, but also the reparation cost of the polluted soil is reduced, and the win-win effect of economical benefit and social benefit is achieved.

The invention discloses a method for constructing ecological infiltration pavement in a sponge city. The ecological infiltration pavement in the sponge city comprises a subbase layer, a base layer, an infiltration layer and a permeable pavement. The construction method comprises steps as follows: 1) an infiltration material is prepared; 2) the subbase layer and the base layer are paved; 3) the infiltration layer is paved by paving the infiltration material under the pavement; 4) curbs are mounted and the permeable pavement is paved. The method has the advantages as follows: the construction method is ecological and environment-friendly and has better repeatability and reproductivity, and the porosity and the rainwater infiltration rate of the pavement can be increased; the water storage performance and the pollutant purification capability of the pavement and surrounding soil can be remarkably improved, pollutants in water and road safety accidents are reduced, the local climate is moderately adjusted, the problems such as rain diseases, the heat island effect, soil moisture deficiency, city noise and the like of the city are remarkably solved, and a good reference function is provided for construction of urban ecological roads while the problems about urban ecology, environment and safety are solved.

The invention relates to a method for laying percolation type rainwater drainage pipes in Sponge City Construction. The method comprises the following steps: digging grooves by adopting manpower or a compact excavator, sequentially laying medium sand and bottom gravels, laying and connecting the percolation type rainwater drainage pipes, further laying gravels on the tops and the side surfaces of the pipes, backfilling the grooves with soil, and finally performing treatment on the ground surface by adopting water-permeable concrete or water-permeable asphalt. The method has the advantages that the percolation type rainwater drainage pipes are combined with the permeable pavement, the city rainwater discharge is accelerated, and meanwhile, the water storage capability and the pollutant purification capacity of the pavement and the surrounding soil are improved, so that the method is not only simple but also environmentally friendly.