753 results about "Soil compaction" patented technology

An apparatus and method are provided for the in-situ measurement of the stiffness of a layer of soil or other surface of interest. The apparatus includes a contact foot for engaging the surface and a drive transducer coupled to the contact foot for applying a vibratory force to the contact foot in response to a drive signal. A motion sensor is coupled to the contact foot and in a preferred embodiment an additional sensor measures the force applied to the contact foot and hence to the surface. These sensors generate corresponding output signals. The output signals are used to generate a measurement signal that is representative of the surface stiffness.

Systems and techniques are provided for managing an interface between a machine or work vehicle and a surface that the machine / work vehicle travels on in order to provide an optimum work performance level that balances fuel efficiency and surface adversity. Fleet management and reporting capabilities pertaining to such interface management are also provided.

A mobile turf instrument apparatus has a wheeled frame that may be propelled over the ground by a motive device, such as by a separate vehicle or by its own engine and drive train. A driven arm is carried on the frame and revolves in circles to periodically insert the probe(s) of a probe assembly into the ground during motion of the frame. The drive to the arm is momentarily disengaged when the probe(s) of the probe assembly are inserted into the ground. The probe assembly comprises two parts that rock relative to one another. Two soil measurement devices are connected to the probe assembly. A soil moisture sensor is coupled to the probe assembly for measuring soil moisture when the probe(s) are inserted into the ground. A load cell is responsive to the amount of rocking of the two parts of the probe assembly to measure soil compaction.

The invention relates to a soil compacting system which comprises a travelling and steerable soil compacting device and a control device. The control device is provided with an area definition device which allows a user to establish an area to be compacted and the area boundaries. A position detecting device detects the actual position of the soil compacting device. A traveler changes the direction of travel of the soil compacting device by presetting a standard value for a travelling movement of the soil compacting device in such manner that the soil compacting device does not travel past the respective area boundary but continues its travel within the area. A path planning device may be provided for fixing a presetting for a travel way which makes sure that the soil compacting device, when keeping to the preset travel way, travels at least once completely across the area to be compacted.

An apparatus automatically removes soil samples at intervals over a field of interest. The apparatus comprises a sampling assembly that rotates on a track. The probe of the sampler assembly is extended through the track and into the ground, then retracted on each revolution of the track. The sampler assembly is hinged and guided along a track in order to minimize soil compaction as the probe rotates around the rear wheel of the apparatus. Soil is ejected by means of a “rumble path” along the top of the track. The soil samples are pneumatically transferred to a bagging assembly located in the tractor pulling the apparatus.

The invention discloses an air spray explosion type soil deep scarification and deep fertilization device. The air spray explosion type soil deep scarification and deep fertilization device comprises a compressed air generation device, an airflow spray explosion and energy storage device and a scarification and fertilization gun; the airflow spray explosion and energy storage device is communicated with the compressed air generation device in an on / off manner, is used for storing compressed air and can spray and explode in a high pressure to generate spraying airflow; the scarification and fertilization gun is communicated with the airflow spray explosion and energy storage device and is inserted into the underground to guide the high-pressure spraying airflow into the soil; the air spray explosion type soil deep scarification and deep fertilization device further comprises a fertilizer pumping and transporting device; the fertilizer pumping and transporting device is communicated with the scarification and fertilization gun in the on / off manner, and the spraying airflow entering in the scarification and fertilization gun generates negative pressure for the fertilizer to absorb the fertilizer when the fertilizer pumping and transporting device is communicated with the scarification and fertilization gun. The air spray explosion type soil deep scarification and deep fertilization device solves the problems of deep scarification and deep fertilization of the oil and long-distance transportation of powdery fertilizer, is suitable for large-scale cultivation of plains, and is also suitable for dispersed plots such as mountainous areas and hills; furthermore, the powdery fertilizer conveying system is convenient to move; soil compaction is avoided; big transportation amount is achieved; the deep scarification system has low requirement on power, is small in volume, light in weight and low compaction for soil, and can enable fertilizer powder to be mixed with soil efficiently.

An apparatus for monitoring soil compaction using a compaction machine which applies periodic impact blows to the soil surface. The apparatus comprising a rotatable, multi-sided compactor mass that applies periodic impact blows to the soil surface when rolled over that surface. Data related to the level of compaction of the soil surface is derived, during compaction of the soil surface, from the deceleration of the compactor mass as it impacts the soil surface. This is achieved using one or more accelerometers mounted on the impact compactor.

In order, e.g., to achieve a solution which assists a farmer in working land in a way which reduces the risk of soil compaction of the land there is, among others, disclosed a method of determining a work trajectory to be followed by an agricultural work vehicle. The method includes accessing a soil carry capacity map of an area of land to be worked by the agricultural work vehicle, receiving load data of the agricultural work vehicle so as to determine the agricultural work vehicle load and determining the work trajectory to be followed by the agricultural work vehicle. The work trajectory is determined by correlating the soil carry capacity map and the load data of the agricultural work vehicle, so as to optimize that the area to be worked with low carry capacity is worked with low agricultural work vehicle load.

The invention discloses a method for measuring soil compaction degree based on ground penetrating radar. The method comprises the following steps: adopting a ground penetrating radar cross-section method to measure the volume weight of soil; processing an acquired measurement signal, and defining a zero point measured by an electromagnetic wave to obtain accurate time domain information; extracting electromagnetic wave propagation speed, and establishing a regression equation of reverting the volume weight of soil in combination with the electromagnetic wave propagation speed and other soil factors; extracting the amplitude of the electromagnetic wave, using the correlation between the amplitude energy value of the electromagnetic wave and soil penetration resistance to proof the feasibility of the soil compaction degree measured by the ground penetrating radar; calculating the decay rate of the electromagnetic wave, using the correlation between the decay factor of the electromagneticwave and the soil penetration resistance to proof the feasibility of the soil compaction degree measured by the ground penetrating radar; using the average speed of propagation of the electromagneticwave to calculate the average volume weight of a soil body, and using the amplitude of the electromagnetic wave and the decay factor to reflect the characteristic that the soil compaction degree gradually changes along with the depth. The method disclosed by the invention is accurate, simple and fast.

An agricultural enhancement method for removing or overcoming soil fragipan, hardpan, or other natural and / or artificial soil compaction barriers is disclosed. These barriers prevent root and / or water penetration, which inhibits agricultural development. Consequently, removing and overcoming these barriers is beneficial to the soil and to agricultural yields.

The invention discloses a construction method for a collapsible loess foundation. The construction method comprises the following steps of: firstly, performing foundation treatment on a loess field with collapsibility by using a super downhole dynamic consolidation (SDDC) pile; secondly, collecting undisturbed soil on site, normally performing an indoor experiment to measure an inter-pile soil compaction coefficient and an SDDC pile body compaction coefficient, evaluating the collapsibility, and if any one of the three indexes cannot meet a design requirement, performing pile compensation construction on the SDDC pile until the design requirement is met; and finally, pouring the pile and mudjacking. The method has the advantages of economy, environment friendliness, high treatment depth, good treatment effect, large bearing potential, high complicated load resistance and the like. By application of the method, various side effects caused by the collapsibility of the deep collapsible loess field can be eliminated, and requirements of upper-part high rise buildings on the bearing capability and settlement of the foundation can be met.

A framework for diagnosing and predicting a suitability of soil conditions to various agricultural operations is performed in a combined, multi-part approach for simulating relationships between predictive data and observable outcomes. The framework includes analyzing one or more factors relevant to field trafficability, workability, and suitability for agricultural operations due to the effects of freezing and thawing cycles, and developing artificial intelligence systems to learn relationships between datasets to produce improved indications of trafficability, workability, and forecasts of suitability windows for a particular user, user community, farm, farm group, field, or equipment. The framework also includes a real-time feedback mechanism by which a user can validate or correct these indications and forecasts. The framework may further be configured to override one or more of the soil state assessments to ensure that indicators and forecasts are consistent with the recently-provided feedback.

According to the invention, a single device permits the relative soil rigidity values of a section of soil to be determined in a rapid measuring method and in addition, absolute soil rigidity values to be determined in a slightly slower method. If the device is calibrated with the aid of the measured absolute values, a rapid absolute measurement can also take place. The device can also be used for soil compaction.

The invention discloses a method for measuring soil suction according to a light reflection theory. The method mainly includes: (1) adopting the light reflection theory for measuring soil saturation degrees to distinguish dry soil and wet soil, and carrying out the next step if wet soil is determined; (2) selecting saturation degrees from a soil-water characteristic curve; (3) selecting dry density from an actual measurement solid-line curve; (4) compacting soil for measurement in a mould to the dry density selected in the step (3) and the corresponding saturation degree, and adopting a camerafor taking pictures; (5) quantifying images obtained in the step (4) by gray levels according to gray values; (6) analyzing average gray value variation conditions to find out a relationship betweenthe saturation degrees and the gray values. The method is a novel low-cost direct color analysis technique free of intrusion disturbance and applied to canal embankment, expressway and runway roadbeds, filling liners, earth dams and the like, limitations of common instruments for measuring suction of farmland and rock-soil base facilities are avoided, and an application range is expanded.

The invention relates to a microbial composite fertilizer and a preparation method thereof. The microbial composite fertilizer comprises: by weight, 5 to 15 parts of urea, 5 to 15 parts of monoammonium phosphate, 5 to 15 parts of potassium sulfate, 10 to 30 parts of weathered coal, 2 to 10 parts of a calcium-magnesium-phosphate fertilizer, 30 to 80 parts of organic fertilizer powder and 3 to 5 parts of composite bacteria. Compared with simple chemical fertilizers, the microbial composite fertilizer is more scientific and reasonable in composition and structure, has a higher level than a level of a traditional fertilizer in performance, improves a nutrient absorption rate of a crop from 30% to 65%, improves soil compaction and increases fertility of soil.

An apparatus and method are provided for the in-situ measurement of the stiffness of a surface. The apparatus includes a platform, which is movable relative to the surface. A stiffness measurement device is supported by the platform in a stationary position relative to the surface for a measurement period during movement of the platform along the surface.

An agricultural sprayer is provided, having a plurality of wheels. By providing six wheels, a narrow overall wheel width may be maintained to allow for use of the sprayer in post-emergent crop spray applications. By providing six wheels, a greater amount of fluid may be provided on the vehicle without increasing soil compaction. By providing low soil compaction and a high fluid capacity, the applicator may be utilized in both pre-emergent and post-emergent situations, and may be utilized on wet or soft ground, where standard applicators may not be utilized.

In order to achieve a solution which assists a farmer in working land in a way which reduces the risk of soil compaction of the land there is, among others, a method of determining a work trajectory to be followed by an agricultural work vehicle. The method includes accessing a soil carry capacity map of an area of land to be worked by the agricultural work vehicle, receiving load data of the agricultural work vehicle so as to determine the agricultural work vehicle load and determining the work trajectory to be followed by the agricultural work vehicle. The work trajectory is determined by correlating the soil carry capacity map and the load data of the agricultural work vehicle, so as to optimize that the area to be worked with low carry capacity is worked with low agricultural work vehicle load.

The invention discloses a soil pad compacting device for a construction site. The right end of the driving shaft is fixedly connected with a semi-conical gear, and the upper and lower ends of the semi-conical gear respectively mesh with a first bevel gear. The first bevel gear is fixedly connected with a driven shaft, and the end of the driven shaft bears The main body of the connecting device is rotated; the lower end of the driven shaft is fixedly connected to the screw rod, the screw rod is threadedly connected to the threaded sleeve, the lower end of the threaded sleeve is sleeved with the movable sleeve, and a buffer spring is arranged between the threaded sleeve and the movable sleeve. The device drives the driven shaft to reciprocate positive and negative rotation through the semi-conical bevel gear, and then drives the screw to rotate to realize the up and down movement of the pressure head while compacting the ground while driving the horizontal plate to move left and right intermittently to discharge soil, and the driving shaft drives the stirring through the gear set while compacting. The shaft rotates to stir the earth material to avoid solidification and no falling. The structural design of the device is reasonable and applicable, which greatly improves the efficiency of soil tamping on the building ground, and has a high degree of automation, and the integration of soil drainage and tamping.

The invention discloses a filling construction method for a collapsible loess subgrade, and belongs to the technical field of construction of railway subgrades. The filling construction method for the collapsible loess subgrade comprises the following steps of 1, finishing foundation treatment on a collapsible loess subgrade foundation by combining CFGs (cement flyash gravel pile) and water soil compaction piles; 2, laying a 1m-thick water soil cushion layer on the top surface of the foundation, wherein two layers of geogrids with tensile strength of not weaker than 120KN / m in the water soil cushion layer; 3, after the filling construction of a part (3) below the foundation, adjusting the width of the subgrade and the slope of side slopes according to needs, removing redundant filled soil, and compacting the side slopes. According to the filling construction method for the collapsible loess subgrade, the technical problem of how to implement reasonable filling construction under a dry condition in a northwest region is mainly solved, and a continuous compaction technology is adopted for a filling construction process for the collapsible loess subgrade as an auxiliary quality control means.

The invention relates to a soil compactness and moisture composite measuring method and device. The method comprises the following steps: obtaining the acceleration and pressure of a probe during the process that the probe is inserted into soil to be tested; subjecting the acceleration and pressure to a noise removing treatment; analyzing the acceleration and pressure after the noise removing treatment so as to determine the measuring result of soil compactness; and based on a volumetric soil water content model, according to the compactness measuring result, converting the soil moisture into volumetric water content under standard soil compactness. The provided method is more universal for measuring the soil compactness. The measurement error due to uneven inserting speed of probe is avoided. The soil compactness can be measured more precisely. The measuring error of volumetric soil water content caused by different compactness of soil can be avoided. The volumetric soil water content can be measured more precisely. The research on agricultural production, forest breeding, and ecological and environmental monitoring is well assisted by the provided method.

The present invention includes a device and method for more particularly evaluating the compaction of soil by automating the use of a prior art dynamic cone penetrometer such that user error and error caused by field conditions are eliminated. Recordation of penetrometer data previously not recorded is made more precise by the present invention such that standardized measurement results. The device further includes means for facilitating the determination of compaction of soils through keyhole openings and a means for automating the collection and processing of the generated compaction data.

The invention discloses a dynamic load testing testbed for an agricultural mechanical rotary cultivation part. The dynamic load testing testbed comprises a soil groove and a trolley, wherein the trolley comprises a trolley rack, a rotary cultivation system, a soil compaction system, a soil leveling system and a walking system, the rotary cultivation system is installed at the front end of the trolley rack, the soil compaction system is installed at the rear end of the trolley rack, the soil leveling system is installed on the trolley rack and located between the rotary cultivation system and the soil compaction system, and the walking system is installed on the trolley rack. The testbed represents operation of the rotary cultivation part based on the soil groove and tests dynamic load of the rotary cultivation part. The dynamic load testing testbed has the advantages that the dynamic load testing testbed is not limited by seasons and farming seasons, can conduct real-time recovery processing on soil according to different demands, is good in testing repeatability, is not influenced by outside climate and natural conditions and the like, and can provide data support for theoretical research and design improvement of coil cultivation parts on the basis that a large number of resources are saved.

The invention provides a composite mineral soil repair agent, which is prepared from the following components in parts by weight: 60-75 parts of medical stone, 5-15 parts of zeolite, 20-25 parts of peat, 5-15 parts of pumice, 5-15 parts of bentonite and 0.5-1 part of microbial fermentation liquid, the repair agent is prepared from steps of material selecting, crushing, mixing, stirring, granulating, drying, checking and packing, the soil repair agent prepared by the invention can perfect soil quality, prevent soil compaction, regulate pH value and adsorb heavy metals to well perfect the growth soil environment of crops so as to beneficially improve the yield of the crops.

The invention relates to a soil dynamic characteristic test technique for geotechnical engineering and especially relates to a simple instrument and a method for test of an internal stress of a soil mass under cyclic loading. A large quantity of researches and reports record that the roadbed soil under the cyclic loading is suffered from dynamic stress accumulation, but the academics does not pay attention to the phenomenon. The simple instrument can be mainly used for measuring the response conditions of the internal stress in the soil on factors such as different cyclic loading magnitudes, loading waveforms, loading frequencies and soil compaction rate, and acquiring the parameters, such as settlement curve, dynamic elastic modulus, total deformation modulus, static elastic modulus, of the soil mass under the cyclic loading effect. The method provided by the invention belongs to an innovative technology which is simple in laboratory test and convenient in soil dynamic characteristic acquisition; with the help of a lever pressure meter, the instrument can realize 10-times load output and can save instrument consumable materials and power sources; a computer system can be utilized to realize the automatic control on the instrument control and the data collection.

The invention discloses an air-flow type deep-plowing and deep-fertilizing system. The system comprises a plowing and fertilizing gun inserted into soil and an air-flow type particle fertilizer supply device for conveying the particle fertilizer to a fertilizer inlet of the plowing and fertilizing gun, wherein the air-flow type particle fertilizer supply device comprises an air compressor and a primary material conveying pipe which is connected with an air outlet of the air compressor; the primary material conveying pipe is provided with a material feeder which absorbs materials through a Venturi structure. The system can solve the problems of deep-plowing and deep-fertilizing soil and movably conveying the particle fertilizer for a long distance, and can be suitable for scaled cultivation of a plain and also suitable for scattered parcels such as mountainous areas and hills. The particle fertilizer conveying system is convenient to move, the soil is not compressed, and the conveying amount is large. The deep-plowing and deep-fertilizing system is not high in power requirement, small in volume, light in weight, flexible to move and little in soil compression, can relatively effectively mix the fertilizer particles with soil, and has little damage on growing root systems of plants.

The invention provides a soil compaction device and a measuring method. The device comprises a compaction case, a compaction rack and a heavy hammer. The compaction case is a cuboid case enclosed by two side plates, a rear plate and an organic glass plate. The base plate is an iron plate provided with a water discharge groove which is inclined and has a corner point provided with a drain hole for the water discharge of the iron groove. The cuboid case is fixed on the base plate via a caulking groove. Sealing rings are disposed on the base plate and the circumference. The side plates, the rear plate and the base plate are connected together via hinges. The organic glass plate and the base plate are hermetically riveted. A film provided with coordinate grids adheres to the surface of the organic glass plate. The compaction rack is disposed on the upper surface of a compaction drum. The position of the compaction case is fixed via fixing pins. A pulley is disposed on the compaction rack for suspending the heavy hammer, and a ruler is disposed near the heavy hammer for measuring the height of the heavy hammer which is a rectangular parallelepiped-shaped metal block and used for hammering soil.