144results about How to "Easy to get local materials" patented technology

The invention discloses a fluidized bed combustion ash and high titanium slag compounded stable pavement base material. The fluidized bed combustion ash and high titanium slag compounded stable pavement base material is formed by mixing 30-90wt% of fluidized bed combustion ash with 10-70wt% of high titanium slag. The fluidized bed combustion ash, the high titanium slag and water are stirred and mixed, and the obtained mixture is molded and maintained to make a fluidized bed combustion ash and high titanium slag compounded stable pavement base. The compounded stable pavement base material completely utilizes difficult-treatment and high-discharge-amount industrial wastes comprising the fluidized bed combustion ash and the high titanium slag, contains no lime or fly ash, and has better performances than traditional lime-fly ash stable pavement base material; and the compounded stable pavement base material has the advantages of low cost, no consumption of natural resources, simple and easy preparation method, suitableness for being used in areas short of traditional road engineering materials, substantial economic benefit, wide market prospect and strong practicality.

The invention discloses a treatment process of lignite upgrading wastewater. The treatment process comprises the following steps: 1) adjusting the pH value of the wastewater to be treated to 3-11; 2) adding a flocculant to precipitate; 3) then adjusting the pH value to 4-8; 4) using the upgraded lignite as an adsorbent to adsorb; and 5) then using activated carbon as an adsorbent to adsorb. In the treatment process, the pH value is adjusted firstly and flocculation and precipitation are performed secondly to precipitate suspended pollutants, thus the precipitation effect can be increased; then the product of the lignite upgrading process, namely upgraded lignite is used as the adsorbent to adsorb, the porous structure of the upgraded lignite is used for replacing a lot of activated carbon to perform the adsorption of pollutants and adsorbing most of harmful substances; and finally a little activated carbon is used for performing final adsorption. Therefore, the dosage of the activated carbon can be greatly reduced, the cost can be reduced, the treatment process can realize low cost and high self-sustainability, and the real standard discharge of the lignite upgrading wastewater can be realized on the premise of successfully reducing the treatment cost of the lignite wastewater.

A crop straw particle fuel and its production are disclosed. The fuel is prepared by drying crop or plant waste under moisture content 16%, crushing them into powder with grain size under 8mm from side-rub multifunctional crusher, mixing one material or several materials with water, steam vaporizing, compression forming from special straw granulating flat die machine, cooling, and packing into particle fuel of which grain size is 6-9mm, length is 20-30mm and moisture content <=14wt%. Its advantages include low cost, high density, heat value and forming rate, simple process and no environmental pollution.

The invention relates to a liquid projection bomb, a projecting device and a delivery method thereof. The projection bomb comprises a shell and is characterized in that functional liquid is filled into the shell, and the shell is made of soft or hard materials easy to crack when bumped. The functional liquid comprises water, alcohol, fuel oil, and mixed liquor of water, an extinguishing agent, a fertilizer or a drug. The liquid projection bomb and the projection device are economical, practical and convenient to operate, the method that the liquid projection bomb is delivered by the projection device is simple and easy to implement, the delivery efficiency is high, and market application prospects are quite broad.

The invention relates to the technical field of culturing aweto and in particular relates to a method for culturing the aweto with artificial industrialization, which solves the problems of existing aweto industrialization culture that the investment is large, the cost is high, mycelium can not be separated out, and strains are easily degenerated. The method of the invention carries out two-grade seed production, namely, production in a test tube and the production in liquid. The mycelium and stroma are respectively cultured on artificial media, the research about the quality and the output of two shapes of the aweto is paid more attention, the culture of compound aweto is not emphasized, and effective components of the mycelium and the stroma are equivalent to that of natural aweto. The method of the invention is convenient and practical, raw materials can be easily obtained on the spot, the strains are not degenerated, the output is high, the quality is high, the cost is extremely low, and the method can be accepted by vast farmers.

The invention discloses a natural gas foam stabilizer system. The natural gas foam stabilizer system consists of the following components in percentages by mass: 22.7%-56.8% of nano particle dispersion liquid, 0.006%-0.01% of a surfactant and 5,000-100,000 mg.L<-1> of mineralized water. The invention further discloses a preparation method of the natural gas foam stabilizer system. The preparationmethod comprises the following steps: adding NaCl or CaCl2 in water at normal temperature, stirring uniformly and preparing into the mineralized water; taking various components proportionally; addingsodium alcohol ether sulphate with EO number being 3 at first; and then adding nano SiO2 particle dispersion liquid, and stirring uniformly to obtain a natural gas foam system. The surface-modified positively charged nano SiO2 and the sodium alcohol ether sulphate as a negative-nonionic surfactant with the EO number being 3 have remarkable synergistic effect, the natural gas foaming ability can be improved, the natural gas foam stability can be greatly enhanced, and application of the natural gas foam system in tertiary oil recovery of oil-gas field development is greatly promoted.

The invention discloses a transesterification preparation method for 1,3-dioleic acid-2-triglyceride palmitate, and belongs to the technical field of oil processing. The transesterification preparation method is as follows: separating and extracting to obtain palmitic acid and oleic acid by taking lard oil as a material; synthesizing triglyceride palmitate by utilizing candida rugosa lipase to catalyze palmitic acid and glycerol; and synthesizing 1,3-dioleic acid-2-triglyceride palmitate by utilizing immobilized rhizopus oryzae sn-1,3 specific lipase to catalyze triglyceride palmitate and oleic acid. According to the method provided by the invention, used materials are wide in source and low in price, a reaction process is simple, and product content is higher, and purity can reach 76.19%, and therefore, the transesterification preparation method is suitable for industrial popularization and application.

The invention discloses a fresh ginger / breeding ginger overwintering storage method, comprising the following steps of building a cellar for storage on the indoor ground in a surrounding way; paving a ground film on the bottom of the cellar, covering the ground film and the inner walls of the cellar with dry straw, and stacking breeding ginger layer by layer in the space surrounded by the dry straw in a way of separating the layers of breeding ginger with the dry straw; after the completion of stacking the breeding ginger, covering the top part of a ginger stack with the dry straw, and wrapping the outer walls of the cellar with a plastic film for sealing; implementing overwintering management. According to the fresh ginger / breeding ginger overwintering storage method, the problem that when a traditional outdoor cellar storage method for the breeding ginger is adopted, frost damage or heat damage is likely to occur during the overwintering process is solved; the loss of the breeding ginger during the storage period is effectively decreased.

An environmentally friendly antifreezing PVA fiber cement-based composite material and a preparing method thereof are disclosed. The composite material includes 300 kg / m<3> of cement, 700 kg / m<3> of I-grade high-calcium fly ash, 240 kg / m<3> of water, 160 kg / m<3> of quartz sand, 360 kg / m<3> of blast furnace water-quenching slag, 140 kg / m<3> of waste ceramic fine aggregate, 170 kg / m<3> of waste glass micropowder, 130 kg / m<3> of stone chip powder, 30 kg / m<3> of volcanic ash, a water reducer the mass of which is 1.3% of the mass sum of the cement and the I-grade high-calcium fly ash, a thickener the mass of which is 0.11% of the mass sum of the cement and the I-grade high-calcium fly ash, a defoamer the mass of which is 1.0% of the mass sum of the cement and the I-grade high-calcium fly ash, and PVA fibers the volume of which is 2% of the total volume. The composite material overcomes the problem that waste occupies a large area of land and pollutes the environment, reduces hillstone and river sand mining, and is advantaged by being energy saving and environmentally friendly.

The invention relates to an airtight full concrete LNG (liquefied natural gas) full-volume storage tank, which comprises an outer tank, a bearing table, a dome, an inner tank and an airtight sealing system, wherein the outer tank and the inner tank are of a cylinder-shaped prestressed reinforced concrete structure; the bottom end of the outer tank is fixed on the bearing table; a tank bottom coldinsulation structure is laid on the bearing table positioned inside the outer tank; the dome is of a spherical circular arc shape reinforced concrete structure and covers the top of the outer tank; the bottom end of the inner tank is fixed on the tank bottom cold insulation structure; a tank top cold insulation structure is laid at the top part of the inner tank; a tank wall cold insulation structure is arranged in an annular space between the inner tank and the outer tank; the airtight sealing system is arranged in the tank wall cold insulation structure near one side of the inner tank. The reinforced concrete structure with stable structure mechanical property, low cost and effect of easily obtaining materials from local sources is used for replacing X7Ni9 steel; the bearing capability of the inner tank structure is greatly improved; a large amount of building costs is also reduced; the tank volume limitation of a conventional LNG full-volume storage tank is greatly broken through onthe basis; the unit volume operation efficiency is obviously improved.

The invention provides a method for flowing water culturing of grass carp in a mountainous area. Natural conditions of the mountainous area are fully used, and dissolved oxygen in water is increased with a natural drop water injection method, running water culturing is guaranteed, so that cultivation of the grass carp is close to natural ecological stocking, and flood, natural enemies and other factors influencing growth of the grass cap are eliminated. The method comprises steps as follows: A, a water tank is dug in a land close to a mountain spring or a stream in the mountainous area and is disinfected, a water inlet and a water outlet are formed in the water tank, mountain spring water or stream water is injected into the water tank from the water inlet of the water tank at a certain height drop through a pipeline, and blocking nets are arranged at the water inlet and the water outlet; B, fries are put into the water tank in the density of 5-8 fries per cubic meter; C, in the growth period of the grass carp, work including three steps is performed, namely, feeding, conditioning of water quality and disease prevention, wherein for conditioning of water quality, impurities in water and blockages on the blocking nets are cleared timely; D, adult fish are caught.

The invention discloses a recovery method for ecological slope systems in drought and semi-drought regions. The method comprises the following steps of 1, finishing and danger removal of a slope topography; 2, construction treatment of slope surface hanging nets and anchor rods of a slope; 3, spray-seeding on a subbase course of a similar loam substrate; 4, spray-seeding on the surface of the similar loam substrate; 5, maintenance and management of the slope, wherein the step 5 comprises the sub-steps of covering the surface of the similar loam substrate with a non-woven fabric, strengtheningthe non-woven fabric, conducting watering, applying fertilizers, controlling diseases and pests, conducting reseeding and conducting later monitoring. According to the recovery method for the ecological slope systems in the drought and semi-drought regions, the soil structure is reasonable and stable, and stable vegetation on the slope of the ecological system can be quickly formed.

The invention discloses basalt machine-made sand dry-mixed mortar and a preparation method thereof. The preparation method comprises the following steps: drying machine-made sand in a raw material, and controlling the moisture content in the machine-made to be less than 0.4 percent, the silt content to be less than 1.0 percent and the grain diameter to be less than 5mm; then uniformly mixing and stirring all components in the raw material, metering and bagging, thus obtaining the basalt machine-made sand dry-mixed mortar, wherein the raw material is prepared from 10.2 to 18.3 parts of cement,1.8 to 3.2 parts of pulverized fuel ash, 77.7 to 87.4 parts of basalt machine-made sand and 0.4 to 0.8 part of an additive. The basalt machine-made sand dry-mixed mortar disclosed by the invention isprepared by using the basalt machine-made sand locally produced in Lanzhou to replace original river sand and mixing with the cement, the pulverized fuel ash and the additive special for mortar and belongs to application of new materials, performance indexes of the basalt machine-made sand dry-mixed mortar meet the requirements, the technology is simple, and the cost is low.

The invention relates to a summer acclimation transition method for strawberry tissue culture seedlings. An acclimation transition nursery for the strawberry tissue culture seedlings in summer is established by taking river sand as a field building substrate on a high mountain of which the elevation is not lower than 800 m, wherein the establishment of the acclimation transition nursery comprises the contents of preparing soil of the nursery, killing underground pests, building a seedling shred, transplanting and transiting the tissue culture seedlings, and managing the nursery. According to the summer acclimation transition method for the strawberry tissue culture seedlings, the river sand is taken as the field building substrate, so that the soil is not required to be sterilized; the substrate is clean; pest sources are few; the survival rate of the tissue culture seedlings is high; the survival rate of young seedlings reaches 98.5 percent. The method helps to establish a technical system for propagating strawberry tissue culture seedlings easily and effectively by utilizing a higher-elevation area in summer. By adopting the technical method disclosed by the invention, the acclimation cost of the strawberry tissue culture seedlings is greatly reduced; moreover, the tips of creeping stems of the variety with high flowering and fruiting performance can be taken timely for performing tissue culturing in the introduced cultivation of a new strawberry variety; after subculture, the strawberry tissue culture seedlings can be transited and acclimated in May to August; the propagation speed of virus-free seedlings is increased by over 20 times; the promotion and application speed of the new strawberry variety is greatly improved.

The invention relates to a modern agricultural planting hidden layer filter and drainage and water and soil improving high-yield technology blind drain. An isolation layer, a first filter layer, a second filter layer, a third filter layer, a fourth filter layer and a fifth filter layer are sequentially arranged below a soil plough layer from top to bottom, wherein the first filter layer is composed of coarse sand, the second filter layer is composed of coarse sand and melon seed-shaped gravels or small gravels, the third filter layer is composed of melon seed-shaped gravels or small gravels, the fourth filter layer is composed of inch gravels or medium gravels, and the fifth filter layer is composed of large gravels. A laying layer is arranged on the upper layer of the isolation layer, and a filter net is arranged on the lower layer of the isolation layer. The laying layer is composed of mountain grass or bamboo or leaves or fruit shells or straw or halm or husk. A pipeline with no filter net or a drainage pipeline wrapped by a filter net are arranged in the fifth filter layer and is higher than the horizontal plane of water flow in a canal or river, and a plurality of small holes are evenly formed in the pipe body for water flow. Water in soil on a farmland planting surface layer or hidden layer is drained after being filtered, the drained water quality is improved, the hidden layer soil water level is lowered, and the deep desalination and dealkalization effect can be achieved for salt and alkali farmland. The modern agricultural planting hidden layer filter and drainage and water and soil improving high-yield technology blind drain is easy to construct, practical, durable and low in cost.

The invention provides a planting method of sophora tonkinensis, and relates to the technical field of plant cultivation. The planting method includes the following steps of (1) land selecting, (2) soil preparation, (3) cup seedling cultivating, (4) cup seedling transplanting, (5) fertilization managing, (6) putting flowering branch on frames and (7) preventing and treating disease and insect damage. According to the planting method, no chemical fertilizer is added in the fertilization process, organic fertilizer is used for fertilization and is complete in nutrition and environmentally friendly, properties of medicine materials are not changed, soil is loosened, and the capacity for water retention, heat preservation, ventilation and fertilizer retention is improved; cup seedling cultivation is carried out on seeds of sophora tonkinensis, which is beneficial for promoting healthy and fast growth of the seeds while protecting the seeds. The planting method is high in survival rate and growth quality and suitable for large-scale planting.

This invention involves a wall component material of lightweight concrete formwork and production technology. It has two-component mixtures of separately prepared external surface and inner layer, through synchronous secondary cloth produce shell wall components; The outer surface layer of material weight ratio is as follows : Cement : 33 ~ 37.65%. Lightweight Aggregate : 34 ~ 37%, admixture : 9 ~ 11.5%, excipients A : 1.0 ~ 1.5%, supplies B : 0.10 to 0.15%, additives: 0.25 ~ 0.45 %, water : 18 ~ 22.65%; inner material component of the weight ratio is as follows : Cement : 53 ~ 58.0%, ultra-lightweight aggregate : 3.1 ~ 3.53%, the admixture : 10.5 ~ 12%, supplies C : 1.2 ~ 2.0%, supplies B : 0.05 ~ 0.08%, additives : 0.15 ~ 0.20%, water : 27 to 32%; it is a high strength, light weight, simple in construction, low cost, reasonable structure, good performance wall component materials.

The invention discloses a protective structure for preventing and controlling a riverway concave bank from being eroded. The protective structure comprises an overflow weir formed through double-layerinlaying, a protective arm and dam abutments formed by inlaying large dimension stones. The relatively higher protective arm is arranged on the concave bank side prone to erosion of a riverway, and the relatively low overflow weir is arranged at the center of the riverway, so that river water is centralized in the overflow weir and a protection-free convex bank to flow through a river bend, flowing of the river water close to the concave bank is retarded, the shear stress at the concave bank is reduced, silt at the concave bank is prevented from being eroded by the river water, meanwhile water level rise before the overflow weir is quick, a scour pit is formed behind the weir, pressure gradient is formed on a river bed due to water level difference, and surface water and underground waterexchange is promoted. Compared with a traditional method, the protective structure is low in cost and long in service life, can also prevent the concave bank from being eroded, promotes surface waterand underground water exchange, thus improves the self-cleaning capacity of the riverway, relieves riverway pollution and has a wide application prospect in the fields such as channel improvement ofriverway and mountainous area drainage basins.

The invention discloses a molding construction method of a large-scale equipment foundation deep reserved foundation bolt hole. The method comprises the working procedures of manufacturing an inner mandrel, winding and wrapping a protective layer of the inner mandrel, mounting and fixing the inner mandrel, pouring concrete, and the like. Through repetitious practices, a hole forming method that inner and outer layered and disassembled mandrels are self-made by square timbers, colored cloth strips and coir ropes is adopted, thereby realizing that an upper aperture and a lower aperture are same so as to form the deep reserved foundation bolt hole required by the design, and the hole forming depth can reach 2 m. In addition, the square timbers, the colored cloth strips and the coir ropes used in the method are easy to obtain from local sources and can be recycled for multiple times so as to be beneficial to saving the cost.

The invention relates to the field of edible fungus cultivation techniques, in particular to a technology for cultivating pocket-size mushrooms with sisal hemp residues as raw materials. The technology includes the steps that compost is prepared with the sisal hemp residues as the raw materials, wherein the water content of the compost is controlled within 70%-75%, and the pH of the compost is controlled within 5.8-6.1; the compost is bagged to be subjected to sterilized inoculation; inoculated fungus bags are placed in a disinfected mushroom house to be cultivated, and the temperature and humidity and ventilation conditions in the mushroom house in the mycelium growth stage and the fruiting stage are controlled respectively; when pilei are 3cm long, the pocket-size mushrooms are picked, delivered to a processing workshop to be graded and packaged, and placed in a refrigeration house to be preserved. The technology for cultivating the pocket-size mushrooms with the sisal hemp residues as the raw materials reduces the cost of the raw materials, improves the taste of the pocket-size mushrooms and guarantees food safety.

The invention relates to a farmland water filtering control and soil amelioration desalination persistent blind drain which comprises an isolation layer, a first filtering layer and a second filtering layer which are arranged from top to bottom in sequence. The isolation layer is formed by an upper straw or crop stalk layer and a lower filter screen, the first filtering layer is formed by small stones, the second filtering layer is formed by middle stones, the isolation layer is covered with a soil ploughing layer, a drainage pipeline is arranged between the interior of the second filtering layer and the bottom of the drain and formed by multiple sections in a connected mode, and a gap exists between every two sections. By means of the farmland water filtering control and soil amelioration desalination persistent blind drain, the water levels overground and underground can be lowered in time, the blind drain filters soil water of the farmland planting surface, the filtered water is drained, the quality of the drained water is improved, the water level of soil of the hidden layer, and deep desalination and dealkalization on saline and alkaline farmland can be achieved; the construction is easy and rapid, and the cost is low.

The invention discloses an indoor storage and fresh-keeping method for ginger. The method comprises the following steps: building a storage room provided with a pit, partition wall building blocks, a thermal insulating layer and a plurality of air pipes in a vacant house, then selecting robust ginger blocks which are uniform in size, good in quality and free of diseases, sequentially stacking selected ginger blocks upwards in the storage room in a layering manner, and finally, covering the surfaces of the ginger blocks on the uppermost layer in the storage room with a soil covering layer and an insulating layer, so as to enable the temperature in the ginger block pile to be stabilized to be 13+ / - 1 DEG C. According to the invention, a reasonable and advanced storage technology is adopted, so that ginger is close to the ground and moisturized, the storage cost is effectively reduced, the preservation effect of ginger is good, the storage capacity is high, the ginger rotting rate is 3% or below, moisture and freshness of ginger are effectively maintained, original color, luster and quality of ginger are guaranteed, economic benefits of ginger farmers and commodity values of the ginger are increased and wide-range popularization and application are facilitated.

The invention relates to a method for pouring different grades of concrete to beam column junctions. The method includes the following steps: a step 1, binding column reinforcing steel bars till the height is higher than an upper surface of an upper floor; a step 2, establishing column plates and a support system on the bottoms of upper beams; a step 3, establishing a scaffold steel pipe support system and templates of upper beams and plates, and binding beam reinforcing steel bars; a step 4, inserting a row of isolation reinforcing steel bars in beams on the column beam junctions, wherein the isolation reinforcing steel bars are higher than the upper surface of the upper floor; a step 5, pouring column high grade concrete to the top surfaces of the isolation reinforcing steel bars with vibrating and compacting the concrete; and a step 6, pouring low grade beam plate concrete before initial set of column top concrete, pulling out of the isolation reinforcing steel bars, performing vibrating and compacting, and completing the pouring work of the concrete. The construction method can use local materials which are low in cost and can be reused; and the construction method is low in construction technological difficulty, can save workers, is high in operability, is good in construction effect, and can separate beam and column concrete.

The invention discloses a powder puff based on application of polyurethane (PU), which satisfies application in baking and catering industries. The powder puff comprises the following components by mass percent: 85-95% of PU and 5-15% of auxiliary preparations, wherein PU comprises the following components by mass percent: 65-75% of carbamate compound and 15-25% of reaction hardening agent; the auxiliary preparations comprise the following components by mass percent: 3-8% of foaming agent and 0.5-1.5% of catalyst. The powder puff provided by the invention has the beneficial effects that a preparation method is simple; the material requirements are low, so that the local materials are conveniently obtained and large-scale processing is satisfied; in the mixture preparation process, the oily components in the carbamate compound are effectively neutralized through auxiliary cooperation of the reaction hardening agent and the foaming agent and the oily feeling of the carbamate compound is eliminated by utilizing the peculiar aroma of the catalyst; the powder puff is scientific and reasonable in formula and does not have any side effect.

The invention provides a rice seedling growth method, comprising the steps of (1) preparing a growth medium, made from, by weight, 80-90 parts of straws, 10-20 parts of straw char, 5-15 parts of animal excrement, 5-15 parts of slag, 0.04-0.05 part of a fermenting bacterium, and 0.8-72 parts of water; (2) dividing the growth medium into two parts, mixing one part with charcoal-base fertilizer, using the mixture as covering earth, and using the other part as culture earth; seeding in the culture earth, covering the surface of seeds with the covering earth, and spraying an aqueous solution of wood vinegar; (3) after the seeds grow seedlings, scattering charcoal-based fertilizer, and spraying the aqueous solution of wood vinegar. The soilless culture medium herein causes less environmental pollution due to straw incineration, the problems are effectively solved, such as difficulty in collecting seedling growth soil from saline-alkaline soil, shortage of bed soil resources and high growth cost, and a new way is provided for the development of seedling growth techniques to harmless, low-cost and low-carbon trend.

The invention discloses a method for reducing emission of potent greenhouse gas N2O in sludge earthworm composting. The method comprises the following steps: step 1, arranging a buffer layer and adding earthworms into the buffer layer, wherein a matrix of the buffer layer is fermented and decomposed feces of livestock and poultry, and the conductivity of the matrix is below 5.0mS / cm; step 2, arranging an isolation net with a plurality of through holes on the buffer layer; step 3, adding sludge on the isolation net to form a reaction zone, wherein the earthworms can move between the buffer layer and the reaction zone through the through holes. According to the method, by adjusting the parameters such as the carbon-nitrogen ratio, the moisture content, the density and the like of the earthworms in the sludge earthworm composting, stabilization and reclamation of the sludge are realized, and the emission of the greenhouse gas in the process of sludge earthworm composting is greatly reduced. The method has the advantages of being high in efficiency, low in consumption and low in operating cost, achieving eco-environment protection and reducing the emission of the potent greenhouse gasN2O, therefore, the method has actual application value in reduction of secondary pollution in sludge treatment processes of sewage treatment plants in medium and small towns.

The fluoride-fixing fuel include the following components: fluoride-fixing additive and common coal, and the fluoride-fixing additive is baked dolomite. The weight ratio between the baked dolomite and common coal is 5-50 %. The present invention solves the environmental pollution problem of burning coal to release great amount of fluoride polluting environment and the problem of available stove with incomplete fluoride elimination and provides one new fluoride-fixing way. The said fluoride-fixing fuel has excellent effect of reducing environmental pollution caused by coal burning, and may be used widely in industrial and domestic stoves burning fluoride-containing fuel.

The invention provides a construction method for a sand filling type damping sound-absorbing wood floor ground. According to the construction sequence, the construction method comprises the following steps that a base layer of the structure is cleaned; the elevation of a leveling layer is set, and cement fine stone concrete of the leveling layer is constructed; wooden keels are subjected to antiseptic treatment, laying and fixing; wiring pipelines are laid in the wooden keels; the wooden keels are filled with dried medium-fine sand; wood laths are laid; and surface layer wood floors are laid. According to the construction method for the sand filling type damping sound-absorbing wood floor ground, the structure is reasonable, construction is convenient, efficient and safe, raw materials are easily obtained in local areas, the economic benefit is high, and the installing quality and the using function of the wood floors are easily ensured.

The invention discloses a hidden layer permanent drainage ditch for farm flourishing, comprising an isolation layer, a first filter layer, a second filter layer and a third filter layer which are orderly arranged from top to bottom, wherein the isolation layer is made of straw or stalk; the first filter layer is made of small stones; the second filter layer is made of small stones or medium stones; the third filter layer is made of large stones; a soil cultivation layer is covered on the isolation layer; a bracket is arranged between the third filter layer and the bottom of the ditch; a gutterway through which the water can flow is formed between the bracket and the bottom of the ditch; a plurality of water gaps or holes, which are transparent up and down are distributed in the bracket. The hidden layer permanent drainage ditch has the advantages of being lasting in drainability, smooth in water, convenient to build, and firm and durable; overground and underground water levels are effectively reduced; time and labor are saved.