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144results about How to "Improve engineering performance" patented technology
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Soil solidifying agent
The soil curing agent as one kind of engineering material for curing and stabilizing various kinds of soil is especially suitable for curing silt and other kinds of low viscosity soil. The soil curing agent has main cement material comprising ore powder, flyash and water, as well as proper amount of alkali exciting component, expanding component and surfactant, and is prepared through mixing the materials and grinding to Blaine fineness of 3000-5000 sq m / kg. Specifically, it consists of mineral admixture 40-60 wt%, cement 15-25 wt%, alkali exciting component 5-15 wt%, expanding component 15-25 wt% and surfactant 0.01-0.1 wt%.
Owner:SOUTHEAST UNIV
Train running fault diagnosis device based on multi-source information fusion, and method
InactiveCN104833534AAvoid diagnostic uncertainty problemsLow costRailway vehicle testingSingular value decompositionOn board
The invention discloses a train running fault diagnosis device based on multi-source information fusion, and a method. The train running fault diagnosis device based on multi-source information fusion comprises a trackside fault early warning apparatus and a vehicle on-board fault diagnosis apparatus. The trackside fault early warning apparatus comprises a trackside vibration sensor disposed at one side of the track, and a temperature sensor. The vehicle on-board fault diagnosis apparatus comprises an axle box vibration sensor and a framework vibration sensor. The diagnosis comprises the steps of firstly adopting the singular value decomposition and de-noising technology to conduct noise-reducing process on various signals; secondly adopting HHT to extract fault characteristic constant from various vibration signals; thirdly adopting SVM and a threshold determining method to conduct train running local fault diagnosis; finally adopting improved D-S evidence theory to conduct decision fusion on the local fault diagnosis result, and realizing accurate diagnosis of running fault. The train running fault diagnosis device based on multi-source information fusion, and a method are advantageous in that the cost is low, precision is high, and device is simple; the problem of a single sensor that diagnosis may be not accurate can be resolved; the accurate diagnosis of the train running fault can be completed.
Owner:GUANGZHOU METRO GRP CO LTD
Train bogie bearing service process monitoring and fault diagnosis system and method
ActiveCN104236911AEasy to installTimely state changesMachine bearings testingBogieDigital signal processing
The invention discloses a train bogie bearing service process monitoring and fault diagnosis system and method. The system comprises vibration sensors, a collecting board card, an AD chip, a digital signal processing board card and a diagnosis service mainframe, the digital signal processing board card is of a double-processor architecture with a DSP (digital signal processor) and an FPGA (field programmable gate array), the vibration sensors are arranged on an axle end cap of a train, and each bogie is provided with four vibration sensors. The vibration sensors collect vibration signals of a bogie bearing, analog signals are acquired through the collecting board card integrating amplifying and filtering functions, digital signals are acquired after the AD chip samples the analog signals and then input into the FPGA of the digital signal processing board card, and the FPGA primarily preprocesses the collected digital signals, inputs the same into the DSP to complete preprocessing and sends results to the diagnosis service mainframe for analyzing, fault diagnosis and fault grading. The train bogie bearing service process monitoring and fault diagnosis system and method has the advantages of low cost, high engineering implementation performance and capability of realizing online realtime monitoring.
Owner:JIANGSU RUNYI INSTR +1
Rail vertical irregularity estimation method and system based on extended Kalman filtering
InactiveCN104878668ALower runTimely detection of changes in vertical irregularitiesMeasuring apparatusVertical vibrationGyroscope
The invention discloses a rail vertical irregularity estimation method and system based on extended Kalman filtering. The system is characterized in that vibration acceleration sensors and gyroscopes are installed on a train body and a frame, the output ends of the vibration acceleration sensors, the gyroscopes and train speed sensors are connected to a central processing unit, and spatial sampling of train body vertical vibration, train body nodding angular speed, frame vertical vibration, frame nodding angular speed and the like is realized through train speed signals. A vehicle rail coupling system state equation is established according to a kinetic equation for a vehicle rail coupling model; a sensor observation equation is established according to signals acquired by all sensors; a filtering iterative equation is configured to obtain time updating equations and measurement updating equations of state estimation and estimation error covariance; an optimal state at each moment is obtained according to extended Kalman filtering, and rail irregularity estimation is finally obtained after inversion by using the time updating equation of the state estimation. The rail vertical irregularity estimation method and system based on extended Kalman filtering have the advantages of low cost, good engineering feasibility, simplicity in operation and online real-time detection.
Owner:NANJING UNIV OF SCI & TECH
On-line vertical track long wave irregularity monitoring method and system
InactiveCN104032629ATimely detection of irregular state changesLow costMeasuring apparatusGyroscopeEngineering
The invention discloses an on-line vertical track long wave irregularity monitoring method and a system. According to the system, a pitch gyroscope is arranged on a framework above a one-class spring of a train walking part, a speed measuring sensor is arranged inside an automobile end cover of a train, and output ends of the pitch gyroscope and the speed measuring sensor are both accessed to a central processing unit. The monitoring method comprises the following steps: acquiring a framework inclination angle speed signal of the train through the pitch gyroscope, acquiring an operation speed signal of the train through the speed measuring sensor, performing time-space domain conversion on the two acquired signals through the central processing unit so as to obtain a time-space domain sequence, performing quadratic integration on the time-space domain sequence by using a filter method, eliminating a trend term generated in integration by using a trend term elimination method so as to obtain a track vertical displacement estimation value, and establishing a compensation filter for eliminating the amplitude and phase deviation of the tract vertical displacement estimation value. The monitoring method has the advantages of low cost and good engineering implementation property, and on-line real-time monitoring is achieved.
Owner:NANJING UNIV OF SCI & TECH
Track height irregularity prediction system and method based on axle box vibration acceleration
ActiveCN104260754AEasy to installAvoid operating and maintenance costsRailway auxillary equipmentRailway profile gaugesVibration accelerationAnalog signal
The invention discloses a track height irregularity prediction system and method based on axle box vibration acceleration. The track height irregularity prediction system comprises an axle box vibration acceleration sensor, a rotation pulse tacho-generator, a simulation preprocessing circuit, an A / D (analog / digital) conversion circuit, an embedded system, a wireless network router and an upper computer. The axle box vibration acceleration sensor is arranged on an axle box disposed on a running part of a train. The rotation pulse tacho-generator is arranged in an end cover of a train axle. Axle box vibration signals collected by the axle box vibration acceleration sensor and train speed signals collected by the rotation pulse tacho-generator are subject to low-pass filtering processing through the simulation preprocessing circuit, analog signals are converted to digital signals through the A / D conversion circuit, the digital signals are sent to the upper computer by the embedded system through the wireless network router to be processed, and the upper computer measures the track height irregularity result through the vibration signals. The track height irregularity prediction system and method have the advantages of low cost and good implementation.
Owner:南京航轩轨道交通科技有限公司
Oil well cement leak-proof toughening agent
The invention discloses an oil-well cement leakage-proof toughener which not only has leakage-proof function and improves the toughness of cement rocks, but also has good multiple-purpose project performance, so as to have double effects and solve the technical problems of slurry loss and the inherent brittleness of the cement rocks in the process of well cementation; the oil-well cement leakage-proof toughener comprises the components based on the weight percentage: 5-30% of organic fiber material, 35-70% of special type inorganic fiber, 1.0-10% of organic polymer material, 5.0-15% of modifying agent and 1.0-10% of auxiliary material.
Owner:NANJING UNIV OF TECH +1
Method for soil remediation and engineering
InactiveUS20060163068A1Effective scavengerLower energy requirementsElectrolysis componentsVolume/mass flow measurementSoil scienceSoil remediation
An electrokinetic method for groundwater protection, soil remediation and engineering which comprises applying an electric field across an area of soil, sediment or slurry so as to generate a pH and Eh gradient and thereby promote the in situ precipitation of a stable iron-rich band. The method may be performed for the purpose of stabilisation and / or strategic dewatering / rewatering of soils, sediment and / or slurries, the improvement of the physical properties of soils and sediments for engineering purposes, the forced and directed migration of contaminated leachates, and / or electro-osmotic purging of non-polar contaminants.
Owner:UNIVERSITY OF BRIGHTON +1
GEO satellite small thruster propellant consumption coupling analysis method
InactiveCN104050338AImprove accuracyImprove engineering performanceSpecial data processing applicationsAnalysis methodTransfer orbit
The invention relates to a GEO satellite small thruster propellant consumption coupling analysis method, and belongs to the technical field of satellite platform overall design. According to the method, the coupling relation between the consumption of propellant at different stages and the radius of a storage box is considered, the position of the mass center of the propellant is updated according to the current stage of a satellite, and the north-south station keeping and east-west station keeping thrust provided by a small thruster and the accuracy of control torque are obviously improved. In the propellant consumption calculating process, the propellant needed by adopting an unloading disturbance torque portion of the small thruster is estimated, a propellant consumption estimating model is made to conform to an actual engineering task, and the model accuracy and actual engineering capacity are improved. Meanwhile, the positions of the propellant in the storage box are different in the static rail stage station keeping process and the transfer orbit stage, different mass center calculating methods are provided, the precision of a position protection thrust and control torque calculating model is improved, and the calculating precision of the consumption of the propellant of a satellite in a full service life period can be improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Dechlorinated alkali residue solidified soil for road engineering
The invention discloses dechlorinated alkaline residue solidified soil for road engineering. The dechlorinated alkaline residue solidified soil comprises components in percentage by weight as follows: 8%-20% of a curing agent, 45%-55% of dry soil and 35%-40% of water, wherein the curing agent comprises components as follows: flue gas desulfurization gypsum, dechlorinated alkaline residues, coal powder ash, slag and an activator; the dry soil is obtained by grinding dried silt clay. According to the dechlorinated alkaline residue solidified soil for road engineering, the alkaline residue pretreatment technology is effectively developed, the silt clay with poor engineering properties is improved into engineering construction soil, and sustainable resource utilization is realized.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Multi-nozzle multi-stage oxygen supplying entrained-flow gasifier and gasification method thereof
ActiveCN102453550ASolution to short lifeSimple processHydrogenGranular/pulverulent flues gasificationSlagFire brick
The present invention discloses a multi-nozzle multi-stage oxygen supplying entrained-flow gasifier. The entrained-flow gasifier comprises a top closed type gasifier body, an ignition nozzle chamber, a gasifier outlet, and at least two process nozzle chambers, wherein process nozzles are arranged inside the process nozzle chambers. The entrained-flow gasifier further comprises at least two secondary oxygen supplying nozzle chambers, wherein secondary oxygen supplying nozzles are arranged inside the secondary oxygen supplying nozzle chambers, the secondary oxygen supplying nozzle chambers are arranged between the process nozzle chambers and the gasifier outlet, and are symmetrically arranged on the circumference of the gasifier body, and the secondary oxygen supplying nozzles are arranged inside the secondary oxygen supplying nozzle chambers. The present invention further discloses a gasification method of the gasifier. According to the gasification method, an oxidizing agent is introduced to the secondary oxygen supplying nozzle during the reaction process to promote the further gasification reaction. With the present invention, a plurality of the nozzles are adopted to carry out multi-stage oxygen supplying on the gasifier, such that the service life of the fire brick structure on the upper space of the gasifier is substantially prolonged so as to substantially improve the operating rate and the performance of the gasifier. In addition, with the present invention, the liquid slag tapping of the gasifier is ensured, and the phenomenon of slag blocking of the outlet is avoided.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for reinforcing aeolian sandy soil by polypropylene fibers
The invention discloses a method for reinforcing aeolian sandy soil by polypropylene fibers. The method comprises the following steps: selecting materials for preparing fiber aeolian sandy soil, wherein the length of the polypropylene fiber is 18mm, the mix ratio of the fiber is 0.3 percent, and the aeolian sandy soil materials are air-dried aeolian sand or aeolian sandy soil (the moisture content accounts for 11.2wt%); according to the proportioning scheme, closely and completely mixing fine TEXSOL with aeolian sandy soil particles by way of spraying, so that a composite three-dimensional spatial structure is formed by the TEXSOL and the aeolian sandy soil; and carrying out mechanical compaction on the composite fiber aeolian sandy soil subjected to spraying, wherein the compaction method and standard of the composite fiber aeolian sandy soil are same as those of common soil, so that the compaction density of the aeolian sandy soil reaches 100 percent of the standard compaction density, and the fiber aeolian sandy soil is compacted closely. By utilizing the method in earth-filled dams, retaining walls and the drainage works of the earth-filled dams, the water stability of the interior of the soil body can be effectively improved, the shearing strength and tensile strength of the soil body can be obviously improved, and the construction process is simple; and because the fiber content of the fiber aeolian sandy soil is very low, the method has the advantages of cheapness and environmental protection.
Owner:HARBIN INST OF TECH
Construction method for roadbed three-dimensional drainage strengthened ecological slope protecting structure
ActiveCN107558480AGood shock resistanceStrong stability and firmnessExcavationsBulkheads/pilesBuilding materialHigh energy
The invention relates to a construction method for a roadbed three-dimensional drainage strengthened ecological slope protecting structure. The construction method mainly comprises the steps of preparation of construction, construction of a high-pressure rotary grouting pile, excavation of foundation trenches, pouring of a concrete strip foundation, mounting of a prefabricated frame grid bottom protecting board, laying of tiepiece belts, laying of a first batch of geocell, building of a first layer of ecological bags and core grouting of vegetation concrete, filling of soil of wall backs and pressing, punning, self-compacting concrete grouting of a lower layer of a press top plate, mounting of prefabricated frame grid press top plates and guardrails, cleaning of the slope surface and spray-seeding of grass seed for greening. According to the construction method for the roadbed three-dimensional drainage strengthened ecological slope protecting structure, the slope structure stabilization, soil and water conservation and greening are completed in one time, and use of building materials with high energy consumption and high pollution can be reduced on a large scale.
Owner:江苏镇江路桥工程有限公司
Method, control system, and movement setting means for controlling the movements of articulated arms of an industrial robot
ActiveCN108369406AReduce in quantityQuick introductionProgramme controlProgramme-controlled manipulatorControl systemControl engineering
The invention relates to a method for controlling the movements of articulated arms (21, 22, 23) of an industrial robot (2) using a movement setting means (3), wherein the movement setting means (3) is held by an operator in a predefined position relative to a reference mark (19, 19', 19") and the reference mark (19) is detected by the movement setting means and optionally read (16), and the distance (17) thereof to the reference mark is measured. The position and the alignment of the movement setting means (3) is detected by internal sensors (9), e.g. inertial / acceleration sensors, or by external sensors (30, 31, 32), e.g. 3D camera. Upon satisfying the coupling condition (25), the industrial robot or individual articulated arms thereof are coupled virtually to the movement setting meansand follow its movements, as if a fixed or rigid or flexible mechanical coupling had been established with respect to the industrial robot. In addition, a haptic feedback to the operator can be provided by a mechanical coupling of the movement setting means to an articulated arm of the industrial robot.
Owner:KEBA GMBH & CO
Soil solidifying agent with high water-resistance and application thereof
InactiveCN103555339AImprove engineering performanceIncrease saturation/densityBuilding constructionsOrganic fertilisersEmulsionFlexural strength
The invention discloses a soil solidifying agent with high water-resistance. The soil solidifying agent is an emulsion and comprises a binder, a reinforcing agent, a dispersant and a filling material, wherein the binder is a high-molecular copolymer with a binding property, and the filling material is a nanometer alumina particle. The soil solidifying agent provided by the invention has strong flexural strength, impermeability, frost heaving resistance and frost boiling resistance, can effectively treat a soft base and enables a pavement base to have good integral stability, flexibility and elasticity.
Owner:江苏路业建设有限公司
Integral reactor with top double-layer structure
ActiveCN103187108AInhibition releaseAvoid direct immersionIntegral reactorsNuclear energy generationEngineeringPressure vessel
The invention provides an integral reactor with a double-layer structure at the top, which comprises a reactor core arranged in a pressure vessel, a built-in steam generator, a main pump and a control rod drive mechanism. A pressure vessel upper cylinder and a ring-shaped equipment support platform form an integral structure, and an arc-shaped pressure vessel inner top cover is connected to the equipment support platform through a flange of the pressure vessel inner top cover and the equipment support platform; the control rod drive mechanism is arranged on the pressure vessel inner top cover, and the main pump is arranged on the equipment support platform; the reactor core and the built-in steam generator are arranged below the equipment support platform; and a pressure vessel outer top cover is arranged at the top end of the cylinder which is arranged at the upper part of the pressure vessel, and is connected with the pressure vessel upper cylinder through a flange of the pressure vessel outer top cover and the pressure vessel upper cylinder. The invention is a structural design solution to the integral reactor having higher safety and better construction property.
Owner:SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
Tenacity anti-fluid-channeling cement slurry for solid expansion pipe fixed well
ActiveCN103320107AImprove engineering performancePrevent premature solidificationDrilling compositionPhysical chemistryEngineering
The invention discloses tenacity anti-fluid-channeling cement slurry for a solid expansion pipe fixed well. The tenacity anti-fluid-channeling cement slurry comprises the following components: 100g of a mixture of G-level oil well cement or G-level cement and silica powder ( when the static temperature of the bottom of the well is more than 110 DEG C), 2.5g-4.2 g of a delaying coagulating agent, 8g-11g of a fluid loss agent, 1g-1.2g of a dispersing agent, 0.5g-0.8g of a toughening agent, 3g-5g of an anti-fluid-channeling agent, 0.1g-0.3g of an antifoaming agent, and 37.3g-41g of tap water, wherein the toughening agent is formed by mixing fiberglass the length of which is 0.3-2mm and polyamide fiber the length of which is 3-5mm according to the mass ratio of 2:1, and the other matters are sold in a market. The cement slurry provided by the invention has the advantages that the cement slurry has the strong sealing property and good comprehensive property, can ensure that a solid expansion pipe is safely and reliably expanded and improve the sealing quality of a cement ring of the solid expansion pipe, and supplements the defects and disadvantages of the prior art.
Owner:成都西南石大石油工程技术有限公司
Rotation-ball washing machine and method
InactiveCN1869315AWater-savingGood water saving effectOther washing machinesControl devices for washing apparatusEngineeringBall type
The invention relates to a rolling ball type washer and the method. It adopts ball as clothes carrier and make the ball rotating in the case to drive the clothes rotating to any direction. The moving method has base moving method and complex moving method. The washer is made up of case, out machine door, plural supporting, and ball identity. While the washer not working, two rotating shaft shut down; while the washer working, one rotating shaft shut down and the other separate to make it rotating. Locating sensors are set on the rotating shaft system to realize the reliable locating and rotating shaft switching.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
Endogenous toughened corrosion-resistant cement mortar system
ActiveCN105967600AGood settlement stabilityReduce water lossDrilling compositionPorosityPolyvinyl alcohol
The invention discloses an endogenous toughened corrosion-resistant cement mortar system which is composed of the following components in parts by weight: 100 parts of high-sulfate-resistance Grade-G oil well cement, 5-35 parts of microcrystal calcium aluminoferrite, 0-25 parts of micro silicon, 1.0-4.5 parts of water-loss control agent, 0.5-3.0 parts of dispersing agent, 0.2-3.0 parts of thickening time control agent and 44-80 parts of water. The microcrystal calcium aluminoferrite is prepared by high-temperature calcination and shock cooling. The micro silicon is a density regulator. The water-loss control agent is polyvinyl alcohol, polyacrylamide or carboxymethyl cellulose. The dispersing agent is sodium hexametaphosphate, melamine formaldehyde resin, sodium lignosulfonate or methyl cellulose. The thickening time control agent is boric acid, gypsum, sodium borate or a mixture thereof. The endogenous toughened corrosion-resistant cement mortar system has the advantages of excellent impact resistance, higher compression strength, high volume stability and small changes of porosity and permeability, has important meanings for ensuring safe and efficient development of shale gas, and thus, has broad market prospects.
Owner:SOUTHWEST PETROLEUM UNIV
Graphene composite rock asphalt anti-rutting modifier and preparation method thereof
InactiveCN109575618AImprove fatigue resistanceImproves rutting resistanceBuilding insulationsGrapheneAsphalt
The invention relates to an asphalt modifier for a road, in particular to a graphene composite rock asphalt anti-rutting modifier and a preparation method thereof. The graphene composite rock asphaltanti-rutting modifier comprises, by weight, 1-5 parts of graphene, 5-10 parts of natural asphalt, 30-50 parts of asphalt, 5-10 parts of SBS (styrene-butadiene-styrene), 2-4 parts of coupling agents and 1-2 parts of dispersing agents. The graphene composite rock asphalt modifier mixture has excellent fatigue resistance and rutting resistance and has good stability at high temperature, the high-temperature performance of the asphalt mixture is improved, the rutting resistance is enhanced, the adhesive capacity of the asphalt and stones can be improved, and the preparation method is simple, moderate in process and low in cost.
Owner:青岛晟华新材料有限公司
Seasonal frozen soil region subgrade structure and construction method thereof
InactiveCN110184872AGood overall mechanical performanceAvoid uneven settlementRoadwaysClimate change adaptationFreeze thaw resistanceCushion
The invention discloses a seasonal frozen soil region subgrade structure and a construction method thereof. The subgrade structure sequentially comprises a light foam layer, a low-liquid-limit clay layer, a composite geomembrane layer, a subgrade filling layer, a gravel layer, a metalling layer, a medium coarse sand layer and a composite heat preservation cushion layer from bottom to top, whereina fiber concrete layer is arranged on the upper surface of the composite heat preservation cushion layer, the section of the fiber concrete layer is in a double-layer trapezoid shape, and the fiber concrete is coated with a subgrade filler. According to the structure and the method, the service life of the subgrade is prolonged, the overall long-term stability of the subgrade structure of the seasonal frozen soil area is ensured, and the defects of insufficient toughness, poor freeze thawing resistance, easy cracking and weak seepage resistance of plain concrete are overcome.
Owner:JIAMUSI UNIVERSITY
The invention discloses a replacement type rotary jet grouting stratum reinforcing method
InactiveCN109778835AMicroperturbationFulfillment requirementsUnderground chambersTunnel liningSpray nozzleSlurry
The invention discloses a replacement type rotary jet grouting stratum reinforcing method. A construction machine tool is composed of a rotary jet drilling machine, a high-pressure pump, a rotary jetdrilling rod, a rotary jet drill bit, a nozzle, a pressure sensor, a hydraulic control valve, a slurry suction opening, a waste slurry storage treatment tank, a construction parameter controller and the like. A pressure sensor is arranged behind the nozzle to monitor the pressure value of the rotary spraying area; Based on the pressure value monitored in the rotary spraying area, the size and theslurry discharging amount of a valve on a slurry discharging opening are controlled; And the sucked and discharged replacement mud is collected into a waste mud storage treatment tank for harmless treatment. The bending angle between the rotary jet grouting drill bit and the rotary jet grouting drill rod is controlled; discharging the floating waste mud; The method has the advantages that the problem of reinforcement of stratums in sensitive areas affected by environments is solved, the quality of formed large-diameter reinforcing bodies is guaranteed, the diameter of the rotary jet grouting reinforcing bodies can reach 4.2 m, disturbance to existing buildings and structures in the reinforced areas is small, and the method is the most effective green construction method for reinforcing thestratums.
Owner:王琪
Vertical spliced type underground diaphragm wall and construction method thereof
InactiveCN108221959AImproves compressive and tensile propertiesIncrease stiffnessBulkheads/pilesRebarSlurry wall
Owner:SHANGHAI INSTITUTE OF TECHNOLOGY
Soil stabilizer for reinforcing roadbed base
InactiveCN105924124ASimple construction operationEasy to get materialsCompressibilityMechanical property
The invention relates to soil stabilizer for reinforcing a roadbed base. According to the formula, the soil stabilizer is prepared from, by weight, 35-45 parts of cement, 10-18 parts of fly ash, 7-12 parts of quick lime, 12-18 parts of calcined gypsum, 6-15 parts of sodium silicate, 4-8 parts of chloride and 6-15 parts of sulfate. The soil stabilizer has the advantages of being low in price, high in reinforcing speed, good in engineering performance, economical, environmentally friendly, novel, efficient and fast, construction operation is easy, and the materials are easy to obtain; soil stabilizer can improve physical and mechanical properties and engineering properties of soil mass and enhance water stability, has high shearing strength, compressive strength, compressibility, penetration resistance, improves tenacity and water resistance, can meet the design standard requirement and is suitable for roadbed engineering construction such as roads and railways.
Owner:JIAMUSI UNIVERSITY
Cemented filling material containing straw fiber and application of same to filling mining
The invention discloses application of a straw-fiber-containing cemented filling material to filling mining, belonging to the technical field of filling materials for mines. The invention also provides the filling material, comprising straw fiber, cement and mine tailings. The invention also provides filling slurry. The filling slurry comprises 0.5-1.5 parts of straw fiber, 174-254 parts of cement, 975-1066 parts of fine tailings and 702-813 parts of water, wherein the fiber has a length of 0.5-5 cm, and the mass concentration of the filling slurry is 60-64% after mixing and stirring. According to the invention, doping of straw fiber into the filling material can effectively overcome the problems of low strength and proneness to cracking of a fine-tailing filling body after curing and improve the compressive performance and fracture resistance of the filling body. With the fiber-containing filling material, the compressive strength and tensile strength of the filling body can meet the requirements of mining on the strength of the filling body, unit consumption of filling cement per cubic meter is reduced, and the utilization rate of the fine tailings is improved, so the straw-fiber-containing cemented filling material is an innovative filling material for mines and has a wide application range and good promotion value.
Owner:CENT SOUTH UNIV +1
Fill side slope gravity type retaining wall reinforcing structure and construction method thereof
PendingCN110847224AImprove reliabilityLow costArtificial islandsUnderwater structuresGeogridRetaining wall
The invention provides a fill side slope gravity type retaining wall reinforcing structure and a construction method thereof. The reinforcing structure comprises an original gravity type retaining wall, a fill side slope above the retaining wall, a high-pressure rotary spraying reinforcement body constructed in the retaining wall foundation, a lattice anchor cable supporting structure constructedon the retaining wall and a slope reinforcing structure constructed on the soil filling side slope. According to the reinforcing structure, the original retaining wall foundation is subjected to high-pressure rotary jet reinforcement treatment, the bearing capacity of the retaining wall foundation is directly improved, the passive protection of the original retaining wall is changed into active protection of the lattice pressure type anchor cable, the anti-overturning, anti-slip and other stability of the original retaining wall is greatly improved, and the displacement of the retaining wall can be effectively controlled; and according to the upper fill side slope, a geogrid is laid in the filling soil, and the deformation condition of the soil body is improved and the engineering performance of the soil body is improved by utilizing the interaction between the geogrid and the filling soil of each layer, so that the stability of the upper fill side slope is guaranteed, and the adverseeffect of the upper filling soil on the original retaining wall can be effectively reduced.
Owner:WUHAN SURVEYING GEOTECHN RES INST OF MCC
Soil solidifying agent
InactiveCN100371418CLow costGood value for moneyOrganic fertilisersSoil conditioning compositionsFirming agentSodium lignosulfonate
The soil curing agent as one kind of engineering material for curing and stabilizing various kinds of soil is especially suitable for curing silt and other kinds of low viscosity soil. The soil curing agent has main cement material comprising ore powder, flyash and water, as well as proper amount of alkali exciting component, expanding component and surfactant, and is prepared through mixing the materials and grinding to Blaine fineness of 3000-5000 sq m / kg. Specifically, it consists of mineral admixture 40-60 wt%, cement 15-25 wt%, alkali exciting component 5-15 wt%, expanding component 15-25 wt% and surfactant 0.01-0.1 wt%.
Owner:SOUTHEAST UNIV
Method for treating collapsible loess foundation using acid-adding presoaking method
ActiveCN106049417AThe method steps are simpleReasonable designEarth material testingSoil preservationSoil scienceAqueous solution
The present invention discloses a method for treating a collapsible loess foundation using an acid-adding presoaking method. The method comprises a first step of sampling, which refers to using a soil sampler to cut to obtain a soil sample from a collapsible loess foundation to be treated; a second step of soil sample testing; a third step of determination of the concentration of a soaking liquid; a fourth step of determination of the usage amount of the soaking liquid; a fifth step of preparation of the soaking liquid according to the determined concentration and usage amount, the soaking liquid being an acid-added aqueous solution and being an acid solution formed by uniformly mixing water with acid; a sixth step of acid-adding presoaking treatment of the collapsible loess foundation, which refers to continuously adding the soaking liquid into the collapsible loess foundation to be treated, the adding time being 3-15 days; and a seventh step of drainage consolidation, which refers to carrying out drainage consolidation treatment on the collapsible loess foundation to be treated by using a drainage consolidation method. The method provided by the invention is simple in step, reasonable in design, convenient to construct, and excellent in using effect; and by using the method, a treatment process of the collapsible loess foundation can be easily, conveniently and rapidly completed, loess collapsibility can be effectively eliminated, the strength of the loess can be effectively enhanced, and the bearing capacity of the foundation can be raised.
Owner:张耀
Rebar connector for butt joint of prefabricated concrete members and butt joint method
The invention discloses a rebar connector for butt joint of prefabricated concrete members and a butt joint method. The rebar connector is composed of a retaining nut, a hook-shaped lock, a string ring, a butterfly-shaped supporting plate and a screw lock connection rod. When a groove in the middle of the screw lock connection rod is buckled and the hook-shaped lock in a connection sleeve are buckled together, rebars of the two prefabricated concrete members are connected. Liquid high-strength binding agents are poured into the sleeve where the rebar connector is placed, the redundant binding agents overflow; and after the screw lock connection rod is inserted, and the screw lock connection rod and the sleeve are bonded into a whole after the binding agents are solidified,. Meanwhile, concrete on the connecting surfaces are also bonded through binding agents, and the problems that time for operation, such as welding, overlap joint, bolting and the like, of traditional connection end plates is long, connector cost is high, and connector strength is unreliable, are solved. According to the rebar connector for butt joint of the prefabricated concrete members and the butt joint method, construction operability is high, the member assembly degree is high, construction operation efficiency is high, engineering materials are saved, engineering cost is low, and the engineering implementation effect is good.
Owner:SHANGHAI ANTOU MACHINERY ACCESSORIES CO LTD +1
Novel Multifunctional Material for Workability of Geopolymeric System and its Process Thereof
ActiveUS20170349488A1Improve mechanical propertiesChange viscositySolid waste managementCement productionChemical reactionGeopolymer cement
The present invention relates to a novel multifunctional material for workability of geopolymeric system and its process thereof. The viscous characteristics in geopolymeric system are responsible for observed negligible workability of geopolymeric cement concrete system and which limits its broad application spectrum. The novel multifunctional material of the present invention prepared by digestion of siliceous agricultural waste i.e. Rice husk with aqueous alkaline materials involving simultaneous and synergistic chemical reactions among the various constituents of rice husk, aqueous alkaline compounds and optionally adding Cetyl trimethyl ammonium bromide (CTAB) to obtain in-situ synthesis of desired nano-sized multi functional agents lignin, hemicelluloses, cellulose, sodium silicate necessary for addressing the issue of workability and also improving the engineering properties of geopolymeric system for broad application spectrum.
Owner:COUNCIL OF SCI & IND RES
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