539 results about "Dry soil" patented technology

The invention relates to a method for remediating cadmium contaminated soil of a vegetable field in situ by compounding bio-charcoal and an organic fertilizer. The method comprises the following steps of: applying a passivation material obtained by compounding the bio-charcoal and the organic fertilizer in a mass ratio of 1:1 to a surface layer of soil of a cadmium contaminated vegetable field, fully and uniformly mixing the passivation material and the soil in a plowing layer with the thickness of 0 to 20cm, judging the contamination level of the soil according to environmental quality standard for soils GB15618-1995, and ensuring that the application rate of the passivation material is not less than 0.5 percent of the weight of dry soil, namely 750kg/mu when the cadmium concentration of the soil is 1.0 to 2.9mg/kg. The invention has the advantages that: raw materials of the passivation material are wide in source and low in cost, the application method is simple and has a remarkable effect of remediating the cadmium in the soil in a passivation way, and the risk of secondary contamination is avoided; and the bio-charcoal is applied into the soil, so the passivation material has the effects of reducing the discharge of greenhouse gas of farmland ecosystems, increasing the content of organic carbon of the soil, improving soil structures and the like, and has huge popularization and application value.

The invention provides a method for restoring heavy metal pollution of vegetable field soil with an in-situ passivation method. The method comprises the step of applying sepiolite and monocalcium phosphate in the vegetable field soil to be restored according to the proportions of 3-9 percent and 0.25 percent of the dry soil according to the specific pollution condition and mixing evenly the sepiolite and monocalcium. The invention reasonably uses passivation materials of sepiolite and monocalcium, remarkably reduces the bioavailability and transferability of the soil heavy metal by reactions of absorption, complexation and precipitation, and the like between the sepiolite and monocalcium and the heavy metal element, simultaneously improves the self-cleaning capacity of the soil, improves the soil fertility condition so as to produce high-quality and high-yield vegetables and restore the ecological function and industrial function of the vegetable field soil. The invention has the advantages of wide material source, simple use method, low cost, favorable restoring effect, wide application range, no secondary pollution and favorable ecological benefits and economical benefits.

This invention discloses preparation and application of regulator for repairing soil polluted by heavy metals. The regulator utilizes hydroxyapatite extracted from animal bone as the main raw material, as well as commercialized Si-Ca-Mg Fertilizer at a ratio of 1:(0.5-1). Besides, solutions containing Fe, Zn, Mn, Mo, B, etc., are also added. The regulator comprises: CaO 40-50 wt.%, SiO2 10-20 wt.%, MgO 3-6 wt.%, P2O5 15-30% wt.%, Al2O3 5-10 wt.%, K2O 0.1-0.5 wt.%, Fe2O3 0.1-1.0% wt.%, ZnO 0.3-0.5 wt.%, MnO 0.1-0.5 wt.%, and impurities. Once applied, the regulator is uniformly mixed with soil according to a ratio of 0.05-1.0 wt. % of dry soil. The regulator has such advantages as abundant raw materials, simple process, low cost, good repairing effect, low addition amount, no secondary pollution, no influence on soil structure, and high nutrition, thus can partly replace chemical fertilizers.

The invention discloses a cultivation method for drily direct-seeding rice. The cultivation method comprises the following steps: A. dry soil preparation: drily ploughing and preparing the land, and raking the land thoroughly; B. application of fertilizer: during the whole growth period, the dosage of nitrogen phosphorus and potassium being 10-13 kg of N, 4-6 kg of P2O5 and 5-8 kg of K2O per mu (a unit of area, equal to 0.0667 hectares), wherein the nitrogen phosphorus and potassium in the base fertilizer is 40%, 100% and 50% of the planned dosage in the whole growth period; C. seed selection and coating: selecting high-yield large-panicle type or intermediate form type of rice seeds, utilizing a special dry cultivation seed coating agent to be mixed with the seeds; D. sowing: sowing the seeds in the last twenty days of April and the first ten days of June at a seed amount per mu of 1.5-4.0 kg; E. weed control: utilizing a weed control method of removing the weed, utilizing a herbicide and supplementing the rice seeds; F. water management: taking rainwater cultivation as a main manner from the seedling emergence period to a three-leaf and one-core period, and conducting flood irrigation from the three-leaf and one-core period to two weeks before harvesting; G. integrated control of diseases and pests. With adoption of the high-yield and high-efficiency cultivation technology for the drily direct-seeding rice, the average yield per mu is 608.7 kg, which is not lower than the conventional transplant planting pattern; furthermore, the moisture production efficiency and the grain nitrogen production efficiency are both obviously higher than that of the conventional transplant planting pattern.

The metal pile head set inside the sunken tube features the conic shape with large-headed horizontal pin on the inner wall. By means of the metal pile head, the sunken tube and corresponding piling method, the diameter ratio between the enlarged pedestal and the pile column may reach 1.5, and the routine enlarged pedestal has area up to 2.3 sq m and bearing capacity up to 270 T. Owing to the setting sunken tube, dry soil taking and air sucking, the pedestal enlarging process can clean the bottom of pile to reach the effective factor of 1.00. The existence of the sunken tube can ensure the reliability of the enlarged pedestal, and the bottom may be enlarged sufficiently and accurately.

Present invention relates to compound transducer for synchronizing real time measuring soil parameters and measurement equipment. Transducer includes steeple head for measuring soil cone index, transducer compound on steeple head for soil moisture percentage on dried soil basis and soil specific conductivity. Measurement equipment includes main upright post, base, guideway, transducer erecting bed, road wheel, data collector platform, controller and accumulator box, wherein said controller having signal input interface and signal output interface, stepping motor, position transducer, and pressure transducer. Said invented equipment realizes soil three parameters synchronizing real-time measurement through synchronizing real time measuring conic high frequency impedance, high frequency loss and taper stress exponent, determining soil moisture percentage on dried soil basis, soil specific conductivity and degree of compaction according to correlative multivariable mathematical model.

The invention is a dry earth drawing-hole forming construction process of a helical digging driller, comprising in turn site layout process, pile position templating process, helical digging driller seating process, steel sleeve burying process, drilling construction process, geologic condition recording process, hole forming checking process, residues cleaning process, etc, and having the characters of replacing traditional manmade experience construction method, needing no slurry to protect walls in the hole forming course, reasonable and convenient to operate, low operating cost, etc.

The invention discloses a dry soil fine crushing and screening device for soil analysis in a polluted area, which comprises a device case, a preliminary crushing roller, a double-axis motor, a first cam, a sealing partition, a fine crushing roller and a screening box. A slider is slidably installed on the lower side of the material plate A, and a packing plate is fixedly installed on the lower side of the sliding block. One side of the packing plate is fixedly connected with a first connecting rod, and the first connecting rod passes through the device chassis and is connected with a top block. A. A fine crushing roller is installed in rotation inside the casing of the device, and arc-shaped plates are arranged on the left and right sides of the fine crushing roller; a screening box is slidingly installed on the guide rod. The crushing and screening device can carry out preliminary crushing and fine crushing, so as to improve the effect of crushing. At the same time, it can carry out fine crushing in batches when performing fine crushing after preliminary crushing, thereby reducing the working pressure of the fine crushing roller and improving the effect of crushing. At the same time, after the crushing is completed, the arc-shaped plates on both sides can be moved to both sides, so as to facilitate the falling of the crushed dry soil.

This invention relates to an organic, environment-friendly, preferably antioxidising and biodegradable climate, soil and growth enhancing mixture of preferably organic materials that can be applied to moist soil as dry matter or dry soil in liquid state, and which subsequently solidifies into a degradable film or membrane on top of or at a given depth in the soil. The properties of the film can be set so that the film regulates or changes the soil's oxidation ability, degradation rate, temperature, greenhouse gas respiration, combustibility, mechanical strength, evaporation rate, water runoff, nutrient conversion rate and germination conditions on and/or below the surface of the soil mass. The film or membrane can be used alone or in combination with standard plant nutrition or fertiliser.

The invention provides a constructing method of a simple ecological leech culture pond. The method comprises the following steps: digging a dry soil culture place to depth of 60-70 cm underground so as to form a basic culture pond; compacting a pond bottom and pond walls; constructing a patrol passage and steps; making a screen box, which is as big as the basic culture pond, by using screens; driving a pile in the constructed culture pond; flatly hanging the screen box on the pile to form a culture screen box; putting hollow bricks at edge parts in the culture screen box; planting underwater grasses and/or water grasses in the culture pond; mounting a sunshade screen in the pond; mounting a bait feeding platform for the pond; and finishing the construction of the culture pond for stocking leeches. The constructing method provided by the invention has the advantages of more reasonable design, convenience in management, simplicity and rapidness in operation, high efficiency and natural property; and by using soil pond+screen box+vegetation as a constructing method, the investment can be reduced. The constructing method provided by the invention is integrated with the advantages of water coil pond culture, soil pond culture and big pond screen box culture, is convenient to manage and achieves high-density intensive culture conditions, so that scientific and ecological culture with high yield and high efficiency is achieved and the leeches can also return to fields according to needs.

The invention discloses a soil curing method through carbonate-mineralization microbes, including the following steps: first, preparing high concentration microbe liquid: inoculating Bacillus pasteurii strain into the culture fluid of beef extract and peptone; wherein each litre of culture fluid contains 4-6g peptone and 2-4g beef extract; cultivating for16-24h under30DEG C with the pH value controlled at 6-8, then getting out the mixture and centrifuging for 5-8min under the speed of 5000-8000rpm, thus getting high-concentration microbe liquid at concentration of 2 X 10<9>-2 X 10<11>cell/ml; second, mixing the soil: mixing the high-concentration microbe liquid prepared in the first step and the newly prepared culture fluid into the dried soil sample through lime(3%-7% the weight of the dry soil) and carbamide(2%-6% the weight of the dry soil) according the proportioning of 100g dry soil per 2-3mL high-concentration microbe liquid and 0-50mL newly prepared culture fluid, blending to be even and then cultivating for 0.5-8days; third; molding through a die: molding the soil mixture cultivated in second step in a die when the mixture reaches the optimal water ratio, then demoulding and conserving in constant temperature of 20 DEG C. Seven days later, the soil will be cured, with the compressive resistance reaching above 1.0MPa, up by 38% as compared with pure soil.

The invention relates to model parameter solution methods, particularly to a method for obtaining Van Genchten model parameters of a soil moisture characteristic curve. The method aims at solving the problems that measuring instruments are expensive and the measurement period is long when a soil moisture characteristic curve Van Genchten equation is obtained by an actual measurement method. The method comprises the following steps of sieving a dried soil sample through a 2mm sieve and dividing the dried soil sample into five equal parts; measuring the field moisture capacity theta fc, the capillary moisture capacity theta mc, the soil moisture suction hmc which is corresponding to the soil capillary moisture capacity, the residual moisture content theta r and the soil moisture suction hfc which is corresponding to the field moisture capacity through the five equal parts respectively; obtaining the parameter m according to the formula; obtaining the parameter alpha according to the formula; obtaining the parameter n according to the formula to achieve the obtaining of the Van Genchten model parameters.

The present invention relates to a short fibre reinforced lime soil ground base treatment method. It is characterized by that it makes the short fibre and lime be mixed in the engineering soil so as to improve the engineering property of soil, and can be used for making ground base treatment. The fibre content is 0.05-0.5% of dried soil weight and the lime content is 1-10% of dried soil weight, the fibre length is 2mm-30mm. Said soil in which the short fibre and lime are mixed is undergone the processes of stirring, stacking and rolling so as to form the invented short fibre reinforced lime soil ground base.

The invention belongs to a uranium ore exploration method, and particularly relates to a combined prospection method for predicting the uranium ore body burial depth. Specifically, the method includes the following steps of determining measuring positions in a measuring area, measuring the content of ground gamma energy spectrum uranium at the measuring positions, measuring the content of instantaneous soil radon gas at each measuring position, taking soil samples at the measuring positions, airing, pulverizing and screening the soil samples, drying the soil samples, using agentia to extract component uranium in the dried soil samples, measuring and determining the extracted adsorbed state component uranium, making a plane contour map, circling an abnormal area, and predicting the uranium ore body burial depth according to abnormal combination conditions of the energy spectrum uranium, the instantaneous soil radon gas, the component uranium, the instantaneous soil radon gas / energy spectrum uranium ratio, the component uranium / energy spectrum uranium ratio and the component uranium / instantaneous soil radon gas ratio. According to the method, the misering workload can be greatly reduced, the prospecting hit rate is improved, and cost is reduced.

The invention discloses a device used for detecting moisture in dry soil. The device comprises a detection rod, conical caps, a leaf spring assembly, a detection assembly and a ball screw, wherein the conical caps comprise the first conical cap and the second conical cap, the leaf spring assembly comprises a movable plate and a spring, the detection assembly comprises a movable sleeve and a soil moisture sensor, the ball screw comprises a screw body and a screw nut, the screw nut is fixed into the detection rod, the screw body is used for driving the movable sleeve to move downwards when moving downwards, and the upper end of the screw body extends out of the detection rod. The two conical caps are arranged on the detection rod, and different conical caps are used during sampling and detection. During detection, a probe of the soil moisture sensor penetrates through a first hole group and then extends into soil through the ball screw, and accordingly moisture detection of the layer of soil can be achieved. After detection, the conical caps can be replaced so that the detection device can continue to extend into the lower layer of soil, and detection is conducted again.

The invention discloses a method for determining soil moisture on the basis of thermal pulse. The method comprises the following steps: Step 1, preparing a soil sample; Step 2, determining the moisture content of the air-dried soil sample; Step 3, preparing a calibration soil sample; Step 4, calculating the weight of dry soil in each cylinder; Step 5, mounting a soil moisture sensor; Step 6, confirming the thermal diffusion time corresponding to the moisture content of the calibration soil sample which is not watered; Step 7, confirming the thermal diffusion time corresponding to different moisture contents of the watered calibration soil sample; Step 8, fitting the function relation between the moisture content of the calibration soil sample and the thermal diffusion time; Step 9, determining the soil moisture of the field to be determined. The method of the invention for determining the soil moisture on the basis of thermal pulse has the advantages of simple principle, high accuracy, easy operation and small destroy; the method with the function of continuous multipoint positioning or mobile determination is not subject to the internal media of the soil, therefore, the application range is wide; the method is free from electromagnetic radiation, thereby causing no harm to human bodies.

The invention discloses a drilling pouring pile hole formation one-pile double-machine construction method, comprising the following steps: both an upper clay layer and a completely weathered rock layer use a rotary drilling rig to drill; the rotary drilling rig at a pile position is mounted; a cutting tool for is welded on the drilling bucket edge of the rotary drilling rig, and is driven by the rotation of a telescopic drilling stem to cutting the soil layer rotatablely. The rotary drilling rig can drill in dry soil or drill with slurry. When reaching a strong or middle weathered rock layer, the rotary drilling rig is replaced to a gyration drilling rig; a special alloy roller drill is mounted on the gyration drilling rig; a forward or backward circulation drilling process is utilized; mortar circularly protects the wall; the drilling operation is executed until the designed hole depth is reached; and an air compressor is used for clearing the hole or the mortar replacement is used for clearing the hole. The method of the invention is simple, economic and practical; besides, the method also improves 50 percent of the drilling speed, shortens the hole formation time, lowers the hole formation cost, decreases the power consumption, saves the energy, reduces the discharged mortar, reduces the environmental pollution, and improves the hole formation quality and the quality of pile foundation constriction of the integral building work.