49 results about "Geotechnics" patented technology

The invention relates to an artificial climate system, and particularly relates to an artificial climate system for a soil-vegetation-atmosphere continuous system model test, belonging to the field of environmental geotechnics. The artificial system can simulate the natural change of climate environments such as wind, rain, illumination, temperature, humidity and the like. The artificial climate system consists of an artificial climate box body, a box body liner, a light source, a rainmaking device, an intelligent control system, a multi-channel converter, an airflow circulation system, a rainwater circulation system, a temperature/humidity regulation system, a CO2 and O2 regulation system, a climate parameter sensor group and a digital imaging system. The system can realize automatic feedback regulation of the rainfall intensity, the illumination direction and intensity, the wind speed and direction and the temperature and humidity. Meanwhile, by adopting a top-rotatable rainfall illumination integrated device, the problem of position overlapping of the rainfall device and the illumination device is solved, and the uniformity of the illumination intensity and rainfall intensity in the horizontal plane is guaranteed.

The invention discloses a model experimental device for piping damage development process of embankment project sandy soil, belonging to the field of physical model experiments of water conservancy projects. The model experimental device comprises three parts, namely a box-shaped experimental instrument, a varying head water supply device and a data acquisition device. The model experimental device can be used for simulating the seepage field change caused by seepage deformation until damage of the dyke-based sandy soil in the embankment project and erosion deformation of the sandy soil and representing the forming and developing process of piping damage of dyke-based sandy soil in the embankment project more reasonably. By adjusting types of an experimental soil sample, the piping damagephenomena of various dyke bases in the embankment project such as uniform dyke base, a dual-layer dyke base, a multilayer dyke base and the like can be simulated; and by adopting a mode of gradually increasing the water head and changing the position (the length of a seepage path) of a piping port, the piping damage and development processes under various hydraulic conditions in embankments of rivers can be simulated. The model experimental device is applicable to scientific research on piping damage relevant to embankment projects, provides guidance for design of actual embankment projects or can be used for teaching experiments of water conservancy project and gotechnical engineering disciplines.

The invention relates to a supercritical fluid restoration treatment system of polluted soil, belonging to the field of environmental geotechnics. The supercritical fluid restoration treatment system mainly comprises a feeding device, an extraction device and a discharging device, and can carry out supercritical fluid extraction restoration on the polluted soil so as to avoid secondary pollution of the environment; the same equipment and the same restoration process can realize simultaneous extraction of different pollution components, so that the extraction range is wide; continuous operation of soil extraction restoration is realized, so that the restoration cost is reduced; due to the adoption of a vertical type ribbon stirrer, the soil permeability is enhanced, the contact area and the contact opportunity with an extraction agent are increased, and the extraction efficiency is improved; no air is mixed in the extraction process, and no loss of the extraction agent is caused, so that the purity of the extraction agent is ensured and the loss of the extraction agent is avoided; and the treatment process is intelligently controlled, so that the intelligent control of extraction parameters of different pollution components is realized, the treatment cost is minimized, and the normal operation of the equipment is ensured.

A composite for geotechnics and building, with an impermeable layer, comprising a sheet element that is impermeable to fluids and has, monolithically therewith, elements that protrude on the first and second faces, on at least one of the faces there being a layer that is integrally coupled to the protruding elements to form, at the first and/or second faces, two separate drainage and/or protection and/or grip systems adapted to withstand intense compression along a direction that is substantially perpendicular to the sheet element.

The invention discloses an anti-seepage slurry infiltration instrument of a refuse landfill, and belongs to the field of environmental geotechnics. The anti-seepage slurry infiltration instrument comprises a reservoir, a cutting ring, a filter disc, a filtrate container, a side pressure pipe and a vent valve, wherein the lower part of the reservoir is opened, and the opening is hermetically connected with one end of the cutting ring, the other end of the cutting ring is connected with the filtrate container through the filter disc, and water drainage holes are formed in the filter disc, and the side pressure pipe and the vent valve are respectively arranged on the top of the reservoir. The infiltration instrument is simple in structure and convenient to operate, a test process is safe and reliable, a test result is accurate, and the anti-seepage slurry infiltration instrument used for the anti-seepage engineering of separation walls of various refuse landfills, the adsorption retardation of anti-seepage slurry is accurately tested, and the data support is provided for the anti-seepage quality of the refuse landfill separation wall.

The invention belongs to the technical field of environmental geotechnics and environment protection and provides an effective vegetation revetment strengthening method under an intense rainfall condition. According to the method, the deformation effect between root hairs, vertical root systems and horizontal root systems with surrounding soil bodies in shallow slip and deep slope slip crack are distinguished. The method comprises the following steps of: determining soil shear strength increased by a ribbing effect of the root hairs; calculating maximum anchoring force of the vertical root systems; calculating interaction force of roots of the horizontal root systems and soil; and reasonably determining the plant line spacing of vegetation on a slope. Based on a soil fixing mechanical effects of the root systems of the revetment vegetation and various root-soil interaction mechanisms, the method provided by the invention is effective and simplified, brings convenience for engineering application, can be used for reinforcing the vegetation revetment and serves as an effective way for preventing slope instability and slippage under the intense rainfall condition. The method can be used for guiding the design and construction of vegetation revetment reinforcing under the intense rainfall condition and can ensure that the design meets expected prevention and protection requirements, thus avoiding unnecessary economic waste.

The invention discloses a method of searching a curved dumping damaged surface of an anti-inclined slope, belonging to the technical field of geotechnics. The method is characterized by comprising thesteps of simplifying a layered rock into an overlapped cantilever beam model, and determining a damage model of a rock stratum according to a rock stratum force mechanism and a strict mechanical derivation; and determining a smallest external force for whole slope damage by combining a Pan Jiazheng principle and a stepwise analysis method, wherein a corresponding damaged surface is a potential slope damaged surface, and a rock stratum covered by the damaged surface is the most dangerous rock stratum group. Compared with the prior art, the method of searching the curved dumping damaged surfaceof the anti-inclined slope has the advantages of first, fully considering the action of the force between rock stratums; second, conducting the whole searching processing according to strict mechanical derivation; and third, determining the accurate number of damaged rock stratums. The searching method provided in the invention solves the uncertainty problem of the existing semi-theory semi-empirical method, makes analysis of the curved dumping theory more reliable, and has high engineering utility value.

The invention relates to the field of environmental geotechnics and particularly relates to a drilling method preventing secondary pollution for reconnaissance of a polluted site. The method is characterized in that after the polluted site is drilled to a prescribed depth and soil layer identification or sampling is finished, a protective tube the diameter of which is larger than the diameter of a drilling hole and the length of which allows the tube to reach the present drilling depth is implanted into the drilling hole, thus separating underground water and hole circumferential soil of the drilling hole from the hole opening to the present depth. The method is advantageous in that accuracy of reconnaissance for the site is ensured, cross contamination of water and soil of different depths in reconnaissance processes is effectively prevented, pollution dispersal caused in reconnaissance processes is effectively controlled, the polluted range of the site can be reflected veritably, and the method is convenient in construction, simple in device, convenient to operate and suitable for popularization.

The invention relates to an effect-losing damage simulation system for a composite seepage-proofing liner. The system belongs to the technical field of environmental geotechnics. The simulation system is composed of a control platform, an observation device and a simulation device. Hydraulic telescopic rods evenly arranged in a simulation container of the simulation device in a matrix mode are respectively controlled by a hydraulic control valve to change in different heights, and the deforming situations under the working conditions of differential settlement deformation for the composite seepage-proofing liner can be effectively simulated, temperature and pressure of test solution affected on the composite seepage-proofing liner can be controlled and adjusted according to test working conditions, a three-dimensional camera device monitors differential settlement of the composite seepage-proofing liner in real time through a marking ball of the simulation device, test parameters is set on a control platform which acquires and processes test data, and test efficiency is greatly improved. The simulation system can effectively simulate effect-losing damage of the composite seepage-proofing liner under mode effects of different solution density, temperature, pressure and differential settlement.

The invention relates to a method for preparing a microwave absorbent by the utilization of municipal dewatered sludge and belongs to the field of environmental geotechnics. The method comprises the following steps: S1, adding 0.01-0.5 part by weight of a photocatalyst, 0.1-2 parts by weight of an extractant, 1-15 parts by weight of a wave-absorbing agent and 0.1-5 parts by weight of an exciting agent into 100 parts by weight of municipal dewatered sludge; S2, uniformly mixing the municipal dewatered sludge with the photocatalyst, the extractant, the wave-absorbing agent and the exciting agent which are added in the step S1; and S3, putting the above sludge mixture into a microwave oven to undergo microwave treatment so as to obtain a microwave oven microwave absorbent for raising heating efficiency. Wastes are changed into valuable things. Solid waste material sludge can be converted into the microwave absorbent. By using the microwave absorbent as an additive, microwave heating efficiency can be greatly enhanced. Meanwhile, the method has advantages of efficiently reducing active organic matter in sludge, passivating inert organic matter and greatly reducing sludge volume, etc.

The present invention which is used for vacuum preloading consolidation relates to an earthwork plastic drain board with a top box, and belongs to the construction engineering technical field. The present invention comprises the earthwork plastic drain board, a plastic box, a hose, a guidance adhesive tape and a cone shaped one-way valve. The hose and the earthwork plastic drain board are connected through the plastic box, and meanwhile, the hose is connected with a vacuum-pumping device. The guidance adhesive tape is connected and fixed with the earthwork plastic drain board, and the cone shaped one-way valve is arranged inside the hose. The present invention does not need to worry about the quality of films as well as the potential adverse effects, in addition, the vacuum preloading consolidation can be processed in part of the area, and thus the sealing problem of the whole processing area is not required to be considered especially.

The invention belongs to the technical field of environmental geotechnics and discloses a method for building an artificial ecological island through river and lake silt. The method for building the artificial ecological island through the river and lake silt includes the steps that cofferdam steel plates are arranged along the design boundary line of the artificial ecological island; river and lake desilting is carried out, and the river and lake silt is obtained; large-particle solid materials such as gravel in the river and lake silt are screened out, and mixed slurry is formed by adding modifying agents into screened slurry; modified mud cakes are formed by dehydrating the mixed slurry; a gravel layer is formed by backfilling a cofferdam with the large-particle solid materials such as the gravel in a paving mode, and water in the cofferdam is discharged; a gravel cushion layer is formed by conducting in-situ solidification treatment on the gravel layer in the cofferdam; the modified mud cakes are piled on the solidified gravel cushion layer in a filling mode; and revetment bricks are used for building a slope in the position, above the gravel cushion layer, of an island body. The filling method for the artificial ecological island has small pollution to the river and lake environment, high adaptability, erosion resistance and high structural reliability.

The invention relates to a slope ecology protection vegetation blanket, and belongs to the environmental geotechnics field; the slope ecology protection vegetation blanket comprises 5 layers including a lower hanging net layer, a lower wrapping layer, a matrix layer, an upper wrapping layer and an upper hanging net layer from bottom to top in sequence; the lower and upper wrapping layers wrap the matrix layer through suture lines in a quadrature waveform linear manner; the lower and upper hanging net layers are respectively bonded with the lower and upper wrapping layers, thus tightly wrapping the matrix layer. The vegetation blankets of various sizes can be prepared in batch according to engineering real demands, thus realizing slope fast building and planting and green recovery, and realizing slope water and soil maintenance and ecology protection.

The invention belongs the technical field of environmental geotechnics and discloses a self-cleaning double-palladium paired-roller agitator. The self-cleaning double-palladium paired-roller agitator comprises a tank, an agitating structure and cleaning structures; the agitating structure is arranged in the tank and is located under a feed inlet of the tank; the cleaning structures are arranged in the tank and on two sides of the agitating structure; the agitating structure comprises palladium shafts which are rotatably fixed on the tank and are connected with a drive structure fixed on the tank and palladium nails fixed on the palladium shafts and capable of rotating around axes of the palladium shafts; the cleaning structures are arranged within the rotation range of the palladium nails to have the palladium nails cleaned. By the arrangement, self-cleaning of the agitator can be realized.

The invention relates to the technical field of environmental geotechnics, and particularly relates to a pollutant diffusion coefficient inversion method based on a horizontal diffuser and a VS2DI program. The method includes 1) a step of selecting soil and measuring geotechnical parameters of the soil, 2) a step of preparing a solution and preparing a soil sample, 3) a step of slicing the soil sample, and measuring a pollutant concentration, and 4) a step of inversing the diffusion coefficient by utilizing VS2DI. The method combining the head-free diffuser and the VS2DI can conveniently and effectively determine a landfill liner head-free diffusion coefficient. Diffusion coefficients under different conditions can be obtained through changing temperatures, pH values, and related parameters, thus providing reference basis for landfill liner designing. Compared with traditional methods, the method is simple, easy in operation and accurate in result.