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42results about How to "Small hole diameter" patented technology
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Drifting sand layer and gravel stratum water-moving double-liquid high pressure slip-casting water-blocking construction method
InactiveCN101255698AHigh strengthImprove water stabilitySolid waste managementUnderground chambersWater blockCement slurry
The present invention discloses a running sand layer and sandy gravel layer dynamic-water double-liquid high-pressure slurry-injecting water-shutoff construction method which comprises the following construction steps: drilling a hole, flushing the hole, executing double-liquid high-pressure slurry-injecting operation and sealing the hole. The running sand layer and sandy gravel layer slurry-injecting liquid adopts an ordinary portland cement (P.O.42.5) and 40''Be sodium silicate as material for preparing the slurry, according to the weight proportion of water: cement, namely the cement slurry is prepared with the water cement ratio for 0.5-1.2:1. Then the slurry-injecting liquid is prepared with the volume ratio of cement slurry: sodium silicate for 1:0.08-0.15. The sodium silicate is taken as additive for regulating the initial setting time of the slurry-injecting liquid. The cement slurry can also be doped with fly-ash with cement consumption (weight proportion) for 10%-15%. The invention executes water-insulating construction aiming at the characteristics of large pressure of the underground dynamic water and high flowing velocity in the running sand layer and sandy gravel layer, and can obtain the maximal application sphere and optimum water-shutoff effect.
Owner:HUNAN CONSTR ENG GRP COR
Method for treating landslide projects through combining chemical electroosmosis method with micro anti-slide piles
InactiveCN102322067AIncreased shear strength factorReduce processing costsClimate change adaptationExcavationsMetallic electrodeChemical solution
Owner:HOHAI UNIV
High slope earthwork and support engineering construction method
The invention discloses a high slope earthwork and support engineering construction method which comprises the following steps of: carrying out construction measurement, pay-off and positioning; clearing and excavating a temporary drainage ditch; excavating a first layer of earthwork of a current-class slope; finishing a side slope of the current-class slope; drilling on the current-class slope according to a preset anchor cable installation position to form an anchor cable mounting hole; manufacturing and installing an anchor cable on the current-class slope; grouting the anchor cable mounting hole on the current-class slope; excavating a lower layer of earthwork of the current-class slope; constructing a waist rail on the current-class slope; carrying out prestressed anchor cable tensioning and locking on the current-class slope; sealing and anchoring the current-class slope; repeating the construction step of the current-class slope and completing the construction of a subsequent-class slope; and monitoring the side slope. Due to the adoption of the high slope earthwork and support engineering construction method disclosed by the invention, the high slope earthwork and support engineering construction method capable of effectively ensuring the stability of the side slope after the side slope is excavated is implemented. The high slope earthwork and support engineering construction method has the characteristics that after construction, a rock-soil body has stable structure; the process is simple and convenient; the high slope earthwork and support engineering construction method is safe to construct; the investment of large-scale mechanical equipment is reduced; and the cost is saved.
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD
Freezing resistant cement based stress sensor element
The invention relates to a sensor element in the technical field of detection, in particular to a freezing resistant cement based stress sensor element, which comprises a test block and a pair of electrodes. The electrodes are respectively positioned on the upper surface and the lower surface of the test block, and the test block comprises a cement substrate and electric conductive fibers uniformly distributed in the cement substrate; and the cement substrate is made of calcium sulphoaluminate cement mortar, and the electric conductive fibers comprise short-cutting polypropylene hydrocarbon fibers and carbon nano tubes. The invention has the advantages that:1. by adopting calcium sulphoaluminate cement as the cement substrate, the stress sensor element has favorable freezing resistance with the application range broadened to the temperature below a freezing point; and 2. besides doping with the carbon fibers as functional bodies, the carbon nano tubes are introduced simultaneously, therefore, the sensor has sensitive changes of pressure-volume characteristics with stable data.
Owner:UNIV OF JINAN
Flue-cured tobacco open field culture round hole type transplanting method
The invention discloses a flue-cured tobacco open field culture round hole type transplanting method. The method comprises the following steps: (1) carrying out land preparation, ditching, applying a basic fertilizer and ridging; (2) carrying out punching to form round holes on ridge bodies by adopting a puncher; (3) vertically placing the tobacco seedlings into the round holes in a mode that roots are downwards to carry out transplanting; (4) sprinkling root fixing water in which a seedling improvement fertilizer is dissolved along the hole walls and at the same day, spraying a pesticide; and (5) after transplanting seedlings for 3 to 5 days, checking and supplementing the seedlings, applying an additional fertilizer after 10 days, filling the round holes after 15 days, earthing to ditches until ridge bodies are full after 35 days, and then entering the management stage. The method has the following advantages that 1, the transplanting round holes have small diameters so as to cause low damage to the ridge bodies and a mulched plastic film; 2, the method has no compressing effect on soil in the holes; 3, tobacco seedling transplanting efficiency is improved; 4, the tobacco seedlings are promoted to early grow and quickly tiller and growth neatness of the tobacco seedlings is improved; and 5, the method is simple to operate and is easy to popularize. The method is suitable for planting flue-cured tobacco.
Owner:GUIZHOU TOBACCO SCI RES INST
Measuring device for brillouin optical sensing type continuous multipoint displacement meter
The invention relates to a measuring device for a brillouin optical sensing type continuous multipoint displacement meter. The invention aims at providing the measuring device for the brillouin optical sensing type continuous multipoint displacement meter to simplify the whole structure, reduce construction difficulty and cost and accurately justify the occurrence location of an actual transformation. The technical schemes includes that the measuring device for the brillouin optical sensing type continuous multipoint displacement meter is characterized by comprising a brillouin optical sensing type continuous multipoint displacement meter which is solidified in a drill hole through grouting, a brillouin interrogator which is connected with the displacement meter through a transmission optical cable and a data analysis computer which is connected with the interrogator through signal lines. The measuring device for the brillouin optical sensing type continuous multipoint displacement meter is suitable for the safety monitoring fields of water conservancy,hydropower and geological engineering.
Owner:POWERCHINA HUADONG ENG COPORATION LTD
Distributed soil heat conductivity coefficient testing system and testing method thereof
ActiveCN111624227AReduce volumeEasy to carryMaterial heat developmentThermodynamicsThermal coefficient
The invention discloses a distributed soil heat conductivity coefficient testing method and testing system, and the testing method comprises the following steps: burying a composite optical cable in ato-be-tested soil body, wherein the composite optical cable comprises an optical fiber and a thermal resistance material layer wrapping the optical fiber; a heating control module is used for heatingthe to-be-measured soil body through the thermal resistance material layer, and an optical signal processing control module is used for continuously collecting heating temperature data of the stratum; processing the heating temperature data by using an optical signal processing control module, calculating and outputting heat conductivity coefficients of the soil body to be measured at different depths according to a heat conductivity coefficient calculation formula, and drawing a curve graph of the heat conductivity coefficients and the depths. According to the invention, the testing system is small in size, convenient to carry, long in testing distance, capable of monitoring the temperature change of the rock-soil body in a deeper range, high in testing efficiency, small in testing result error and capable of obtaining a refined stratum heat conductivity coefficient within a short testing time.
Owner:NANJING UNIV +1
Double drill push-the-bit type guide section
ActiveCN106522826ASmall hole diameterReduced risk of collapseDrilling rodsConstructionsPistonPlunger
The invention discloses a double drill push-the-bit type guide section which includes an oil cylinder outer wrap, an oil cylinder, an internal drill pole and a support plate. The internal drill pole is arranged in the oil cylinder outer wrap and moves along the direction of the axle of the oil cylinder outer wrap. An accommodating cavity is arranged on the outer wall of the oil cylinder outer wrap. A decompression hole is formed in the bottom of the accommodating cavity. The oil cylinder is arranged in the decompression hole. The hole wall of the oil cylinder and the decompression hole slides correspondingly. A seal ring is used for sealing between the hole wall and the oil cylinder. The plunger of the oil cylinder is fixedly connected with the support plate. The oil cylinder outer wrap includes a drilling end and a dynamic end. A convex plate is arranged along the circumference of the inner wall of the oil cylinder outer wrap which is between the accommodating cavity and the dynamic end. The internal drill hole includes a drill pole neck and a drill pole body. The outer diameter of the drill pole body is greater than the outer diameter of the drill pole neck. When the drill pole neck of the internal drill pole moves to correspond to the convex plate, the place between the drill pole neck and the convex plate is provided with an annulus. When the drill pole body of the internal drill pole moves to correspond to the convex plate, the drill pole body is matched with the gap of the convex plate. The double drill push-the-bit type guide section adjusts the extension length of the support plate by adjusting the pressure of the drilling fluid and thus the rate of deviation change of the drilling tools is adjusted.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Device for improving hardened dam contact and electrical imaging directional detecting method of potential hazard body
ActiveCN106154335AExpand the scope of useFacilitate repair workElectric/magnetic detectionAcoustic wave reradiationRisk detectionElectricity
The invention relates to the field of potential dame risk detection, and particularly relates to a hardened dam potential risk detection method and device applying the parallel electrical survey. The device comprises an electrode for an electrical prospecting apparatus, wherein the frame inside the electrode comprises a copper bar and a transfusion duct; conductive sponge and conductive lint sequentially coat the outer part of the middle part of the electrode. The method and the device have the advantages of convenience in field operation, flexibility in operation, low labor intensity and wide application environment since a charging mode electric hammer is adopted to drill the surface of hardened dam; the drilling hole has a small diameter, so that the work for repairing the hardened surface layer of the dam in later phase can be facilitated.
Owner:浙江广川工程咨询有限公司
Construction method of quicklime-modified soil cement pile
ActiveCN106906709ASimple construction processSmall hole diameterRoadwaysBulkheads/pilesPunchingRoad surface
The invention discloses a construction method of a quicklime-modified soil cement pile and relates to the field of roadbed construction and restoration technology. The construction method of the invention comprises the following steps: (1) punching holes at the interval of 1-1.3 m, wherein adjacent holes are arranged in the form of square or regular triangle; (2) uniformly blending cohesive soil, cement, fly ash, quick-dissolving water glass powder and sodium polyacrylate in proportion so as to prepare a ready-mixed material; (3) preparation of a mixture: uniformly mixing quicklime lump and the ready-mixed material to prepare the mixture; (4) pile-forming compacting: compacting the holes every other rows; and (5) carrying out secondary holes pile-forming work after completion of the first holes pile-forming. The construction method has simple process, and pore-forming can be finished by a conventional machine; the reinforcement effect is good, average moisture content of a soil body is obviously lowered after the treatment, and bearing capacity of the soil body is obviously raised; the method is eco-environment-friendly and low-cost, and the construction cost is 50-70% of the cost of a slip casting method.
Owner:SHIJIAZHUANG TIEDAO UNIV
Roadway-free ground drilling fluidization coal mining method
ActiveCN113338932AEasy to pump up the wellPromote fragmentationMining devicesUnderground miningMining engineeringWell drilling
The invention discloses a roadway-free ground drilling fluidization coal mining method. A roadway-free ground drilling fluidization coal mining system comprises a physical fluidization coal mining part and a coal-rock mixture conveying part; the physical fluidization coal mining part comprises a coal mining vertical shaft, a high-pressure conveying pipe and a high-pressure jet device; and the coal-rock mixture conveying part comprises a process inclined shaft, a coal-rock mixture lifting vertical shaft and a coal-rock mixture conveying pipe. The bottom end of the coal mining vertical shaft and the bottom end of the coal-rock mixture lifting vertical shaft communicate with each other and are connected by adopting a directional drilling technology to form a coal-rock mixture self-flowing channel, by means of the height difference between the coal mining vertical shaft and the coal-rock mixture lifting vertical shaft, the coal-rock mixture which is cut by hydraulic power and is in a fluidized state automatically flows into a coal-rock mixture collecting bin and is pumped into the well through a slurry suction pump, the underground unmanned physical fluidized coal mining operation is achieved, and the coal mining vertical shaft, the process inclined shaft and the coal-rock mixture lifting vertical shaft can all adopt relatively small drilling apertures, so that relatively low coal mining cost is realized.
Owner:CHINA UNIV OF MINING & TECH
Construction method using long spiral drilling and wall protection for construction of soil squeezing pile
PendingCN113006048AMeet the requirements of dual controlDoes not affect bearing capacityBulkheads/pilesSpiral bladeStructural engineering
The invention discloses a construction method using long spiral drilling and wall protection for construction of a soil squeezing pile. The method utilizes the characteristic that forward and reverse rotation soil returning directions of a spiral blade of a drilling machine are opposite, drilling is stopped after forward rotation drilling upwards returns part of residual soil to a preset depth, the drill is lifted in a reverse rotation mode, loose soil on a drill rod fills back into a hole for wall protection, and then a soil squeezing pile is constructed. The method has the advantages that the method is simple and practicable, the side friction resistance and the end resistance of the pile can be guaranteed, construction can be achieved by utilizing a common long spiral drilling machine, the method is simple and practicable, convenient to popularize, low in cost and wide in market prospect, and the blank of soil squeezing pile construction is filled up.
Owner:曹兴明
Hole forming process of hole bottom chambering device of anchoring hole
ActiveCN109339708ASmall hole diameterEasy constructionLiquid/gas jet drillingFlushingPipingEngineering
The invention provides a hole forming process of a hole bottom chambering device of an anchoring hole. The hole forming process comprises the following steps: the straight anchoring hole is struck; awater injecting guiding pipe (2) and a water pumping guiding pipe (3) are fixed into a rotary sleeve (1) through a fixing support (7), the bottoms of the water injecting guiding pipe (2) and the waterpumping guiding pipe (3) are made to stretch out of the rotary sleeve (1), and then the rotary sleeve (1) is placed into the straight anchoring hole; the water injecting guiding pipe (2) communicateswith an external high-pressure water pipe, and the water pumping guiding pipe (3) communicates with an external high-pressure water pump; the inner wall of the hole bottom of the anchoring hole is subjected to flow jet cutting through the water injecting guiding pipe (2), and meanwhile, the high-pressure water pump is adopted to pump mud at the hole bottom through the water pumping guiding pipe (3); after high-pressure flow jet hole cutting is completed, the high-pressure water pump is kept to continuously pump the mud at the hole bottom through the water pumping guiding pipe (3), and pumpingis stopped till the cement mud discharging amount of the high-pressure water pump is decreased; and the height of the water injecting guiding pipe (2) is adjusted to adjust the angle of a rotatable support (6), and the whole rotary sleeve (1) is taken out.
Owner:WUDA JUCHENG STRUCTURE CO LTD
Construction method for grouting by adopting highly spraying, drilling and grouting integrated machine
InactiveCN106400785AExpand the scope of diffusionReduce precipitationBulkheads/pilesSodium BentoniteWater leakage
The invention discloses a construction method for grouting by adopting a highly spraying, drilling and grouting integrated machine. The construction method comprises the following steps: arranging a check ball valve at a spraying nozzle of the highly spraying, drilling and grouting integrated machine; performing drilling operation by adopting the highly spraying, drilling and grouting integrated machine, wherein a high-pressure medium which is used in a drilling process comprises the following components in parts by weight: 75 parts of cement, 45 parts of bentonite, 180 parts of clay, 6 parts of water glass and 300 parts of water; after drilling is completed, performing grouting operation directly, and simultaneously, adding 6 to 9 parts of a cement accelerating agent from the opening of a hole. The construction method has the beneficial effects that the problems of blockage of the spraying nozzle caused by the fact that fine grains in the hole fall back to the spraying nozzle because of blowing-out in a process of connecting a long drilling rod to a drilled hole and serious water leakage in the hole in the drilling process can be solved; meanwhile, the disturbance to a stratum caused by the fact that the spraying, drilling and grouting integrated machine takes air and slurry as drilling media avoided by taking the measures of the check ball valve, the drilling aperture is reduced, the drilling efficiency is improved, and the cost for treating drilling slag and protecting a wall of the drilled hole is reduced.
Owner:SINOHYDRO BUREAU 11 CO LTD
Enlarged shape memory alloy anchor rod and anchoring construction process thereof
The invention provides an enlarged shape memory alloy anchor rod and an anchoring construction process thereof. An anchor rod supporting structure of the anchor rod comprises a rod body and a rock and earth mass. A bearing table structure is arranged at the end of the rod body. The end of the rod body is sleeved with an annular shape memory alloy component. The rod body and the annular shape memory alloy component are combined and connected through a bearing table to form an integrated shape memory alloy anchor rod body. A predrilled hole is formed in the rock and earth mass, the shape memory alloy anchor rod body is inserted in the predrilled hole, and the shape memory alloy anchor rod body composed of the shape memory alloy component with complete shape memory recovery is locked through a building, a fastener, a carrying board and a table seat. The key construction process includes the steps that the annular shape memory alloy component is manufactured, so that the shape memory alloy anchor rod body, a cylindrical alloy anchor rod anchoring system and an enlarged alloy anchor rod system are formed, and finally an enlarged alloy anchor rod anchoring structure is obtained. By the adoption of the enlarged shape memory alloy anchor rod and the anchoring construction process, the anchoring force (pulling resistance) and the durability of the anchor rod structure can be improved, the application range of the anchor rod structure can be enlarged, the purpose of supporting the rock and earth mass is achieved, the construction process is simple, operation is convenient, and the effect is safe and reliable.
Owner:XUZHOU UNIV OF TECH
Imaging lens compatible with visible light and near-infrared light and imaging device
ActiveCN113267873ASmall hole diameterExpand field of viewOptical elementsNegative refractionImage resolution
The invention discloses an imaging lens compatible with visible light and near-infrared light and an imaging device, and relates to the technical field of optical imaging. The imaging lens compatible with visible light and near-infrared light comprises a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a first diaphragm, a second diaphragm, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power and an eighth lens with positive refractive power in sequence from front to back along the direction of incident light, wherein the fifth lens and the sixth lens form a doublet lens. According to the invention, the view field angle of the imaging lens can be improved, the high imaging resolution ratio is ensured, and the technical effect of shooting a larger range of images at the same distance is realized.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Medical atomizer
The invention relates to the technical field of atomizers, in particular to a medical atomizer, and aims at solving the problem of incomplete atomization. The medical atomizer is technically characterized by comprising an atomizer body and an atomization medicine cup connected with the atomizer body, the atomization medicine cup comprises an atomization shell, an atomization core, locking blocks and a dosing device, wherein the atomization shell is internally provided with an atomization structure and used for being held during atomization treatment; the atomization core is detachably connected with the atomization shell, arranged in the atomization shell and used for atomizing liquid such as medicine liquid; the locking blocks are fixedly arranged on the circumference of the atomization core, and the atomization shell is provided with a clamping groove; the dosing device extends to be arranged on the atomization shell, and the dosing device is a liquid storage device. The medical atomizer can reduce the accumulation in an atomization medicine cup outlet, avoids the backflow of the medicine liquid, facilitates the adjustment of an output end, and does not affect the atomization effect.
Owner:SUN YAT SEN MEMORIAL HOSPITAL SUN YAT SEN UNIV
Parahydrogen enrichment device suitable for high-flow and high-pressure conditions
ActiveCN111115578ASpeed up temperature conductionSmall hole diameterHydrogen separationPhysicsEngineering
The invention provides a parahydrogen enrichment device suitable for high-flow and high-pressure conditions. The parahydrogen enrichment device comprises a temperature detection chamber, a temperaturedevice line protection pipe, a double-chamber connecting pipe, a parahydrogen enrichment chamber, a heat exchange rod, a pressure-maintaining filter cap, an input interface, a cooling pipe, an outputinterface, a catalyst and a temperature display, wherein the temperature detection chamber is connected with the cooling pipe, the double-chamber connecting pipe and the temperature device line protection pipe; the double-chamber connecting pipe is connected with the temperature detection chamber and the parahydrogen enrichment chamber; the parahydrogen enrichment chamber is in a sleeve form andis provided with the heat exchange rod and an outer pipe; the bottom of the parahydrogen enrichment chamber is connected with the double-chamber connecting pipe; the top of the parahydrogen enrichmentchamber is connected with the output interface; an annular cavity between the heat exchange rod and the parahydrogen enrichment chamber is filled with a catalyst; the heat exchange rod is mounted atthe bottom of an inner cavity of the parahydrogen enrichment chamber; the pressure-maintaining filter cap is provided with a filter layer and a pressure-maintaining layer and mounted at the top of theheat exchange rod; filter air holes are formed in the bottom of the pressure-maintaining filter cap; and pressure-maintaining air holes are formed in the side wall of the top of the pressure-maintaining filter cap. By means of such a technical scheme, heat transfer effect can be improved, certain pressure is kept, and high-flow conversion efficiency is improved.
Owner:XIAMEN UNIV
Draught fan silencing device and application of draught fan silencing device on transformer cooler draught fan
ActiveCN106286414AReduce regenerative noiseGood noise reduction effectPump componentsPumpsIntermediate frequencyTransformer
The invention provides a silencing device used for a transformer cooler draught fan. The silencing device comprises a silencing wind tunnel, a first silencing component, a second silencing component and a silencing material. The first silencing component is arranged in the silencing wind tunnel, the second silencing component is arranged in the first silencing component, windward parts of the first silencing component and the second silencing component form a taper structure, each of the first silencing component and the second silencing component is provided with several micropores and is filled with the silencing material. According to the invention, two layers of silencing components being of taper structures are arranged creatively, the silencing wind tunnel is arranged on the periphery of the silencing components, micropores are formed in the sidewalls of the silencing components, the silencing components are filled with silencing cotton, a prevention-type structure capable of reducing high-intermediate frequency noise and a resistance-type structure capable of reducing intermediate-low frequency noise are formed, the silencing frequency band is widened, the pressure loss is reduced, air flow regeneration noise is reduced, and a good silencing effect is achieved.
Owner:北京富特盘式电机有限公司
A Hole Forming Technology of Anchorage Hole Bottom Reaming Device
ActiveCN109339708BSmall hole diameterEasy constructionLiquid/gas jet drillingFlushingEngineeringHigh pressure water
The invention provides a hole forming process of a hole bottom chambering device of an anchoring hole. The hole forming process comprises the following steps: the straight anchoring hole is struck; awater injecting guiding pipe (2) and a water pumping guiding pipe (3) are fixed into a rotary sleeve (1) through a fixing support (7), the bottoms of the water injecting guiding pipe (2) and the waterpumping guiding pipe (3) are made to stretch out of the rotary sleeve (1), and then the rotary sleeve (1) is placed into the straight anchoring hole; the water injecting guiding pipe (2) communicateswith an external high-pressure water pipe, and the water pumping guiding pipe (3) communicates with an external high-pressure water pump; the inner wall of the hole bottom of the anchoring hole is subjected to flow jet cutting through the water injecting guiding pipe (2), and meanwhile, the high-pressure water pump is adopted to pump mud at the hole bottom through the water pumping guiding pipe (3); after high-pressure flow jet hole cutting is completed, the high-pressure water pump is kept to continuously pump the mud at the hole bottom through the water pumping guiding pipe (3), and pumpingis stopped till the cement mud discharging amount of the high-pressure water pump is decreased; and the height of the water injecting guiding pipe (2) is adjusted to adjust the angle of a rotatable support (6), and the whole rotary sleeve (1) is taken out.
Owner:WUDA JUCHENG STRUCTURE CO LTD
Device for improving hardened embankment contact and electrical imaging directional detection method for hidden dangers
ActiveCN106154335BFacilitate repair workConvenient on-site operationElectric/magnetic detectionAcoustic wave reradiationElectricitySurface layer
The invention relates to the field of potential dame risk detection, and particularly relates to a hardened dam potential risk detection method and device applying the parallel electrical survey. The device comprises an electrode for an electrical prospecting apparatus, wherein the frame inside the electrode comprises a copper bar and a transfusion duct; conductive sponge and conductive lint sequentially coat the outer part of the middle part of the electrode. The method and the device have the advantages of convenience in field operation, flexibility in operation, low labor intensity and wide application environment since a charging mode electric hammer is adopted to drill the surface of hardened dam; the drilling hole has a small diameter, so that the work for repairing the hardened surface layer of the dam in later phase can be facilitated.
Owner:浙江广川工程咨询有限公司
Method for controlling energy of laser drilling machine
PendingCN109648192AThe production process is simpleSimplify changesLaser beam welding apparatusConstant powerEngineering
The invention discloses a method for controlling energy of a laser drilling machine. The method is characterized by comprising the steps that during laser drilling, non-constant laser power is provided, and the non-constant laser power is utilized for carrying out laser drilling , wherein a method for controlling the non-constant laser power comprises the following steps that 1, waveform parameters are edited, the waveform parameters are sent to a waveform controller, the waveform controller outputs waveform pulse, and the waveform pulse drives a laser to work; and 2, the waveform parameters are changed, the waveform parameters pass through the waveform controller, different kinds of waveform pulse are generated, and the laser is driven to output different kinds of power. According to themethod, a waveform is divided into small sections, the DA values of the small sections are modified, different waveforms are set randomly, different waveforms drive the laser to provide non-constant power, and the drilling taper of laser drilling is improved.
Owner:成都莱普科技股份有限公司
Construction method of earthwork and support engineering for high slope
ActiveCN102839680BStable structureControl deformationExcavationsSlope monitoringMechanical equipment
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD
Reinforcing steel bar sleeve-free type soil anchor rod anchor head
The invention relates to a reinforcing steel bar sleeve-free type soil anchor rod anchor head. The reinforcing steel bar sleeve-free type soil anchor rod anchor head comprises a barrel-shaped anchor rod wall defined by a plurality of sets of reinforcing steel bars (1) which are arranged at equal intervals and in a spaced manner, a bottom plate (3) is arranged at the bottom of the anchor rod wall,a top plate (4) is arranged at the top of the anchor rod wall, the lower portion of the anchor rod wall is bent to be a cone-shaped body, and the middle portion of the top plate (4) is provided with finishing rolled deformed steel bars (2). The single soil anchor rod ultimate pulling resistance is greater than that of an existing anti-floating pile; and the reinforcing steel bar sleeve-free type soil anchor rod anchor head is convenient to construct and relatively economical.
Owner:WUDA JUCHENG STRUCTURE CO LTD
A kind of detection device for embedment depth of anti-seepage membrane of embankment and using method
ActiveCN108981560BAvoid damageHigh precisionElectric/magnetic depth measurementMaterial resistanceMeasuring instrumentDisplay device
Owner:HOHAI UNIV
A Fan Muffling Device and Its Application to the Transformer Cooler Fan
ActiveCN106286414BIncrease the sound absorption frequency bandSmall pressure lossPump componentsPumpsTransformerIntermediate frequency
Owner:北京富特盘式电机有限公司
Detector for burying depth of antiseepage film of dam and using method of detector
ActiveCN108981560AAvoid damageHigh precisionElectric/magnetic depth measurementMaterial resistancePower flowMeasuring instrument
The invention discloses a detector for the burying depth of an antiseepage film of a dam and a using method of the detector. The detector comprises a penetration rod, the penetration rod is inserted into a bore hole at one side of the antiseepage film via a fixing device, the bottom of the penetration rod is provided with a measuring electrode and a resistivity measuring instrument, the measuringelectrode and the resistivity measuring instrument are connected with a control display via a first lead in the penetration probe, the fixing device is installed in an orifice at one side of the antiseepage film, the penetration rod is inserted into the bore hole at one side of the antiseepage film slowly in segments via the fixing device, change of the current density with the depth in the control display is observed, and after a peak of the current density, the scale, corresponding to the current density peak, in the penetration rod body is read, and serves as the burying depth of the antiseepage film. After that dam soil is electrified, the current density peak in the bottom of the antiseepage film is detected, a measuring result is high in accuracy, the aperture of the bore hole formedby the detector in the dam is small, and damage on the dam itself is low.
Owner:HOHAI UNIV
Method for treating landslide projects through combining chemical electroosmosis method with micro anti-slide piles
InactiveCN102322067BIncreased shear strength factorReduce processing costsClimate change adaptationExcavationsChemical solutionChemical reaction
The invention relates to a method for treating landslide projects through combining a chemical electroosmosis method with micro anti-slide piles. The method comprises the following steps of: arranging metal electrodes and pouring different chemical solutions in boreholes and forming electroosmosis and chemical reaction under the action of a direct current field so as to enhance the shear strengthof potential failure surfaces of sliding zones; and then casting concrete in the boreholes and forming a micro reinforced concrete anti-slide pile system so as to provide a slide-resisting force. Themethod for treating the landslide projects through combining the chemical electroosmosis method with the micro anti-slide piles has the advantages and effects that: through carrying out electroosmosis reinforcement on the soft soil layers of potential landslide zones by using the chemical electroosmosis method, the coefficient of the shear strength of the potential landslide zones is remarkably increased, and the processing cost for the anti-slide piles or other treatment methods is effectively reduced; the bore diameter of the boreholes required by the micro anti-slide piles is small and themicro anti-slide piles are formed in identical boreholes to those for the chemical electroosmosis method through sequentially constructing, thus the difficulty and the cost for boring are low; and the shear strength and the slide-resisting force for landslide sliding zones are effectively enhanced. The method provided by the invention has the characteristics of simple construction technology, strong operability, convenience for quality control, obvious economic benefit and remarkable effect for treating landslides.
Owner:HOHAI UNIV
Manifold device for high pressure mass flow meter and manifold assembly
PendingCN111457972AImprove assembly efficiencySmall hole diameterDirect mass flowmetersEngineeringScrew thread
The invention relates to a manifold device (100) for a high pressure mass flow meter and a manifold assembly (10). The manifold device (100) comprises a rectangular body (110); the upper surface of the rectangular body (110) is provided with two sets of bosses (120) connected with measuring tubes (400); boss channels (121) are formed in the bosses; threaded holes (130) are formed in the two end faces of the rectangular body (110) respectively; and each threaded hole (130) is in fluid communication with the boss channels (121) in the corresponding set of bosses (120).
Owner:MICRO MOTION INC
A three-dimensional in-situ stress determination method based on borehole wall displacement measurement
ActiveCN110907086BShorten test timeSmall hole diameterEarth material testingMeasurement of force componentsWell loggingStress relief
The invention discloses a method for determining the three-dimensional ground stress based on the displacement measurement of the borehole wall. The measuring points are arranged in the hole section in a quincunx-shaped arrangement, and the angle between different test points between the drilling axes; C. The displacement test equipment is approached to the test point in the radial direction and pierces the mud layer of the hole wall, and the core drill bit is used along the Carry out circular cutting around the displacement measuring equipment in the radial direction, and transmit it to the ground in real time through the cable, and the stress relief is completed; D. After the strain relief operation is completed, the drilled core is broken by the core bit and stored on the ground; E. After the test work of all test points is completed, the side wall coring device is recovered and the core is taken out to obtain the three-dimensional ground stress of the test point. The method is easy to operate and easy to operate. The displacement components in different directions are obtained, and the relationship between the displacement of the hole wall and the far field stress is established to obtain the ground stress component at the measuring point.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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