144results about How to "Improve engineering performance" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention discloses a vertical spliced type underground diaphragm wall and a construction method thereof. The vertical spliced type underground diaphragm wall comprises diaphragm wall bodies 1. Each diaphragm wall body 1 is formed by splicing at least three diaphragm wall units in the vertical direction, wherein the diaphragm wall units are the upper layer diaphragm wall unit 11, the middle layer diaphragm wall unit 12 and the lower layer diaphragm wall unit 13 from top to bottom, the two sides of the top and bottom of the upper layer diaphragm wall unit 11 are each provided with six rebars 6, and two rebars are arranged between every two corresponding cavities 2; the top of the middle layer diaphragm wall unit 12 is provided with holes 7 matched with the rebars 6 at the top of the upper layer diaphragm wall unit 11, and the bottom of the middle layer diaphragm wall unit 12 is provided with a plurality of rebars 6; and the top of the lower layer diaphragm wall unit 13 is provided with holes matched with the rebars 6 at the bottom of the middle layer diaphragm wall unit 12. The two ends of each diaphragm wall unit are provided with a concave connector 3 and a convex connector 4correspondingly. According to the vertical spliced type underground diaphragm wall and the construction method thereof, continuous overall construction of the post-poured wall is achieved, and the overall mechanical compression resistance, tensile resistance and leak resistance are promoted substantially.

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.

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.

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.

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.