130 results about "Engineering support" patented technology

The invention discloses a high-strength three-dimensional support system of a yielding type restriction concrete lagging jack, which is mainly formed by a restriction concrete lagging jack, a yielding node, a vertical beam, an anchor rod or an anchor cable, wherein the restriction concrete lagging jack is in a closed structure which is the same as the shape of a roadway and is formed by connecting and combining restriction concrete through a sleeve and the yielding node; the restriction concrete is distributed at an interval and is connected through the vertical beam; the anchor rod or the anchor cable passes through the vertical beam to be anchored into a rock layer; pre-stress is applied so as to form extrusion effect on a surrounding rock; and the lagging jack forms an integral structure with the anchor rod or the anchor cable through the vertical beam, and a space three-dimensional support system is formed by combined action. The high-strength three-dimensional support system is applicable to an underground engineering support including a deep soft rock underground roadway and the like, and has the advantages of high supporting strength, good stability, reasonable stress and the like; and the high-strength three-dimensional support system has a yielding function and can effectively control the stability of a roadway surrounding rock.

The invention relates to the technical field of biomaterials, is particularly suitable for the field of preparation of biomedical tissue engineering support materials, in particular to a method for preparing porous materials used by a tissue engineering support. The method is to adopt mechanical processing technology to prepare the porous materials, to use the porous materials in the tissue engineering support, and to provide a three-dimensional space for adhesion, growth and so on of cells. The mechanical processing method comprises laser processing technology and digital control drilling processing technology. The porous materials prepared by the mechanical processing method have a permeable porous structure, wherein the porosity is between 5 and 99 percent, and the aperture is between 50 and 900 mu m. The method can prepare various metallic materials, wherein the laser drilling technology can also prepare porous polymer materials, ceramic materials, composite materials and so on and have wide application scope.

The invention relates to a quantitative yielding node applicable to an underground engineering support lagging jack. The quantitative yielding node is formed by a lagging jack, a quantitative yielding device, a sleeve and a baffling ring; and the whole appearance shape of the quantitative yielding node is columnar or arc-shaped and the shape of the cross section is circular. The quantitative yielding node is mounted at a spandrel part, a vault part, a laneway side part or a bottom plate part of the lagging rack. The device is simple in structure and is convenient and flexible in installation; a yielding moment and a yielding amount are controllable and a plurality of yielding modes can be selected; the application range is wide; and with regard to various support lagging jacks with different shapes, sizes, cross section shapes and arc degrees, such as a mineral U-shaped steel lagging jack, circular steel pipe concrete lagging jacks with various section shapes and sizes and the like, the quantitative yielding node can be selected. The quantitative yielding node can be used for connecting the lagging jack for an underground engineering support and is particularly suitable for connecting a deep roadway support lagging jack.

The invention relates to three-dimensional porous engineering support material, comprising poly butylene succinate PBS and polycaprolactone PCL, wherein, the weight proportion is that the poly butylene succinate is 90 to 10 shares and the polycaprolactone is 10 to 90 shares. The invention also relates the preparation of the material, which is characterized in that the pore-foaming agent is arranged in a mold evenly and then the PBS / PLC blending chloroform solution is poured in; the support rudiment is put in a hood for 24 hours before immersing deionized water for 2 to 4 days; the PBS / PLC support material can be obtained after drying in vacuum. The invention relates to application of the material also, which mains that the material can be used as supports of bone or cartilage tissue engineered cells for repairing and restructuring the bone or cartilage tissue organ. The support material has the advantages of even inner hole structure and good communication between the holes, namely the hold diameter is between 10 to 500Mum and the porosity is between 70 to 91 percent, as well as the advantages of steady structure and easy preparation technology.

The invention belongs to the technical field of bomedical material preparation, in particular relates to human tissue engineering support loaded with controlled-release cell growth factor and provided with hollow silicon dioxide ball with kernel and a preparation method and applications thereofThe human tissue engineering support is prepared in the following steps: the hollow silicon dioxide submicron ball loaded with cell growth factors and provided with kernel is self-assembled with gelatin to form a compound ball which is composed of the hollow silicon dioxide submicron ball loaded with cell growth factors and provided with kernel and the gelatin; then the compound ball is loaded to macromolecule polymer fiber base material obtained by the electric spinning method, thus obtaining the human tissue engineering support.With hollow silicon dioxide submicron ball with kernel as a slow release carrier of the cell growth factors, cell proliferation and differentiation is promoted by loading and slowly releasing the cell growth factors.The human tissue engineering support of the invention is an all-round imitation of the cell growth microenvironment, thus enjoying broad application prospect in the field of tissue engineering support covering tissue repair and tissue reconstruction.

A composite tissue-engineered porous scaffold material is prepared from the nano-class hydroxy phosphorite particles, medical polyamide and foaming agent through proportionally mixing, heating to fuse it, injection moulding under 30-50 MPa to form porous scaffold, and removing the surficial layer to open the pores. Its advantage is high mechanical performance.

The invention belongs to the technical field of civil engineering support, and particularly relates to a pre-support method for a tunnel having undesirable stratums, particularly water-rich stratums and a special tool for the method. The method mainly comprises the following steps of: 1.1 drilling, namely drilling along the designed periphery of the tunnel at intervals of 0.3 to 1.0m during construction, wherein the drilled holes are horizontal or in an inclination angle below 10 degrees; 1.2 inserting a longitudinal opening perforated pipe into each of the drilled holes and making the bottom of the longitudinal opening perforated pipe adjacent to the designed excavating boundary of the tunnel; 1.3 placing a high-pressure jet-grouting nozzle into one of the drilled holes to perform high-pressure jet-grouting operation; and 1.4, performing jet-grouting to form a plurality of jet-grouting bodies, wherein a pre-support arched shed structure is formed by the plurality of jet-grouting bodies and the longitudinal opening perforated pipe, and the inner liners of the tunnel, the longitudinal opening perforated pipe and the jet-grouting bodies are tightly combined to form an effective support structure. The invention also discloses the special tool for the method.

The invention discloses a support method of a weak and broken surrounding rock tunnel and belongs to the field of underground engineering support. According to the method, the excavation is carried out according to the cross section shape of the tunnel, concrete is jet at the surrounding rock surface of the excavated tunnel for sealing surrounding rock cracks, secondly, anchor rods are constructed at the arch wall position, small guide pipes are applied to the top and the side wall foot part for grouting, the end part of each anchor rod is hung and provided with steel bar net sheets, then, steel pipes are applied for restraining concrete arch frames, the arch frames are arranged at intervals in the axial direction of the tunnel, a steel bar truss is erected between two adjacent arch frames, and the concrete is sprayed for twice. The support method has the advantages that a support system can be enabled to realize the better surface protection performance, the support system has the tamper force with mercy, higher support resistance can be realized, the proper deformation yielding can also be realized, and the support method is suitable for the weak and broken surrounding rock tunnel.

The invention relates to the field of geotechnical engineering supporting, in particular to a segmented hollow grouting anchor cable and a using method thereof. The segmented hollow grouting anchor cable comprises an anchor cable body and a segmented hole sealing device. The anchor cable body comprises a cable main body (1), a tail body nut (2) and a cushion plate (3). The cushion plate (3) is mounted on the cable main body (1), and the tail body nut (2) is connected to the position, on one side of the cushion plate (3), on the cable main body (1) in a threaded mode. The segmented hole sealingdevice comprises a hole sealing plug (7) arranged on the cable main body (1), and the outer side of the hole sealing plug (7) is sleeved with a sleeve (5). One side of the sleeve (5) is sleeved witha fixing frame (6), and a slurry fixing bag is placed in the fixing frame (6). The segmented hollow grouting anchor cable is simple in structure and convenient to machine, the defects of an existing grouting anchor cable are overcome, the problem that as for the existing grouting anchor cable for supporting, the grouting effect is poor is solved, the working efficiency is improved, and the supporting cost is lowered.

The invention discloses an easy-welding tempering high-strength steel plate for an ocean platform and a production method thereof. The easy-welding tempering high-strength steel plate for the ocean platform is prepared by the following chemical compositions in percent by weight: not higher than 0.18 percent of C, 0-0.15 to 0.35 percent of Si, 0.95 to 1.30 percent of Mn, not higher than 0.035 percent of P, not higher than 0.01 percent of S, 1.20 to 1.50 percent of Ni, 1.00 to 1.50 percent of Cr, 0.4 to 0.6 percent of Mo, not higher than 0.05 percent of Nb, 0.03 to 0.08 percent of V, not higher than 0.020 percent of Ti, not higher than 0.003 percent of B, 0.020 to 0.085 percent of Alt, and the balance of Fe and inevitable impurities. The thickness of the easy-welding tempering high-strength steel plate for the ocean platform is from 60 to 100 mm. The easy-welding tempering high-strength steel plate for the ocean platform is prepared by the following method: smelting-vacuum decarburization-LF furnace refining-pouring-cleaning-heating-rolling-water cooling after rolling-tempering-inspection and storage. The easy-welding tempering high-strength steel plate for the ocean platform has an outstanding combination property, is used for engineering machinery, has high surplus amount of impact toughness, can be widely used for engineering supports and other projects needing high-strength steel plates, and has a great application prospect. The easy-welding tempering high-strength steel plate for the ocean platform has simplicity in rolling technology, wide scope of tempering technology and easiness in operation, and is suitable for the production of the steel plant.

The invention relates to the technical field of additive manufacturing, in particular to a 3D printing system of a coaxial spiral structure reinforced composite material and a machining method. The 3Dprinting system of the coaxial spiral structure reinforced composite material and the machining method aim at solving the problems of compression resistance stability and bending resistance of an engineering supporting part, specifically, the system part comprises a three-dimensional forming manufacturing module, a computer control module and a controllable air pressure output system, wherein thethree-dimensional forming manufacturing module is used for outputting a matrix material and a cross-linking material according to two different preset rotation directions, so that the matrix materialand the cross-linking material construct a first printing body and a second printing body which are coaxial and are integrally formed; and the method comprises the following steps of material preparation, configuration of the matrix material and the cross-linking material in a programming material feeding module, coaxial spiral structure additive manufacturing and post-processing. Coaxial spiralarrangement of reinforcing phase discontinuous fibers in a composite material can be achieved, the compression resistance and the bending resistance of a reinforcing material are further reinforced ina coordinated mode, and the application range of engineering application is widened.

The invention involves geotechnical and mine engineering supporting facilities technology field, in particular relates to a hoop limited extension flexible casting and pressing anchor bar. It bases the bar body structure of prior 'flexible casting and pressing anchor bar', imbeds the fiber or steel line or armored rope or the woven fabric of them with length-constant extension structure circumferentially into the outer layer perimeter of longitudinal reinforced layer in the bar body of flexible casting and pressing anchor bar, and it reinforces the whole body of the anchor bar body. It also improves the integrated structure of prior anchor bar and pallet into the assembling structure of anchor bar and pallet. The invention also has advantages as followings on the basement of maintaining prior technology application effect: the circumferential reinforced structure of anchor bar body limits the deforming amount of bar body, strengthens the integral strength of anchor bar body, avoids anchor bar body abatement caused by bar cavity leakage generated by creep deformation and other reasons; when the avalanches of anchor hole port happen or the anchor hole has honeycomb gaps, the anchor bar will not deform limitlessly than the anchor bar abatement is leaded out; the pallet is changed into assemblage structure to make the installation of anchor bar more convenient.

The invention relates to a complex lining adaptive to the great deformation of adjacent rock, relating to underground engineering supporting structure. To resolve the problem that existing linings is no suitable for the evening converge and fracture deformation, the invention discloses a complex lining which includes inner layer and outer layer, the inner layer is concrete layer of thickness 30 to 200 cm and is a rigid layer, the outer layer is a filling layer filled with dirt, rock, sand, and water with a thickness of 30 -150 cm, and is a soft layer. The complex lining adapts the fracture deformation with its deformable outer layer while providing proper support to the adjacent rock protecting inner layer and supporting adjacent rock to stabilize the rock.

The invention provides a geotechnical engineering supporting structure model test device and a test method thereof. The test device comprises a model box body in which a slide belt model is disposed. A traction model system is connected with the front of the slide belt model. The model box body further comprises a bottom plate. An organic glass plate and an iron frame are vertically arranged on the bottom plate. The organic glass plate is arranged inside the iron frame. A rotating shaft is arranged on the front end of the bottom plate. A motor rack is mounted on the rotating shaft. The front end of the slide belt model is fixed to a pincer-like clamp. The pincer-like clamp is connected with the rear end of a force sensor through a force transmission rod. The front end of the force sensor is connected with a force transmission rod penetrating a transmission case. A slowdown motor is connected with the transmission case through a force transmission rod and fixed to the motor rack. The geotechnical engineering supporting structure model test device can accurately measure different supporting structure displacements and stress strains in real time when a low-speed motor tows a predetermined slip surface so as to slide a landslide, and is simple in structure, good in adjustability, easy to operate, and easy to grasp.

The invention relates to the field of underground structure construction, in particular to a prefabricated continuous wall unit. The prefabricated continuous wall unit comprises a prefabricated continuous wall unit body, wherein connectors are arranged at the two ends of the prefabricated continuous wall unit body, and rebars protruding out of the surfaces of the connectors are arranged in the prefabricated continuous wall unit body; two L-shaped steel plates are arranged at the left side and the right side of the front surface of the prefabricated continuous wall unit body respectively, and the upper end and the lower end of each L-shaped steel plate are flush with the upper end and the lower end of the prefabricated continuous wall unit body respectively. The invention further provides an underground continuous wall formed by connection of at least two prefabricated continuous wall units through the connectors and the L-shaped steel plates. Compared with the prior art, the prefabricated continuous wall unit and the underground continuous wall have the beneficial effects that rigidity is high, seepage-proofing performance is high, and a good foundation pit engineering support effect, reasonable dispersion of wall shearing force transmission paths and effective prevention of underground water seepage can be guaranteed when the underground continuous wall serves as a supporting structure and a basement outer wall or an upper bearing member during reverse construction.

Provided is an architectural engineering supporting device. The device comprises a base (1), a balance plate (2) welded on the base, a movable support (4) welded on the middle position of the balanceplate, vertical supporting rods (3) symmetrically arranged on the balance plate and on two sides of the movable support, a horizontal supporting beam (5) which is movably sleeved on the two vertical supporting rods, the bottom of the horizontal supporting beam being placed on the movable support through a sliding rail (9), vertical adjusting rods (6) respectively arranged on two ends of the horizontal supporting beam, a bearing shaft (7) arranged on the top end of the vertical adjusting rod, and a bearing plate (8) arranged on the top end of the vertical supporting rod. The device is flexibleand convenient in use, and stable in supporting.

The invention discloses a pressure-dispersing type anchor rope. The pressure-dispersing type anchor rope comprises an anchor head, at least two bearing plates arranged in anchor holes and at least two anchor rope rib sets correspondingly and fixedly connected with the bearing plates. The cross sectional areas of the anchor rope rib sets connected to the bearing plates sequentially arranged in the direction from the anchor head to the bottoms of the anchor holes are sequentially increased. According to the pressure-dispersing type anchor rope, the stress nature and the deformation nature of the materials of anchor rope ribs are used without depending on other control devices, the cross sectional areas of the anchor rope rib sets can adapt to the pressure borne by the corresponding bearing plates only by adjusting the cross sectional areas of the anchor rope rib sets connected to the bearing plates at different positions, and the effect that the pressure is evenly dispersed is achieved; the pressure-dispersing type anchor rope is simple in structure, the use cost is reduced, the total bearing capacity is effectively improved, the large and evenly-dispersed anchoring force can be provided in the geotechnical engineering supporting field, and the reliability of anchorage engineering can be improved.

The invention discloses an evaluation method for jointed rock performance and bolting and grouting effects under a compression-shear condition. The method comprises the following steps that all factors influencing compression-shear performance of rock are determined, and an orthogonal test scheme is designed according to experience levels of all the factors; a tested part matched with a compression-shear testing machine is manufactured, and compression-shear testing is carried out; a monitoring system is utilized for monitoring the tested part, the whole fracturing process of the jointed rock is recorded, all the factors in monitoring data are analyzed, the specific value of corresponding rock mechanical parameters of a comparison set and a standard set serves as an evaluation index to carry out statistic analysis on the orthogonal test data to obtain the remarkable influencing factors of the compression-shear performance and obtain the parameter range of each related factor of optimal compression and shear resistance; the corresponding relation between different levels of all the remarkable influence factors and the evaluation index of the certain compression and shear resistance or the bolting and grouting effects is obtained, and design and implementation of the geotechnical engineering supporting and bolting and grouting scheme can be guided.

The invention provides a deep-buried tunnel surrounding rock deformation load calculation method, and belongs to the field of tunnels. The surrounding rock deformation load calculation method based onthe surrounding rock deformation condition is deduced and established through a mathematical statistics method by adopting the surrounding rock load on-site monitoring data and considering the surrounding rock level, the tunnel burial depth and the tunnel span factors according to the surrounding rock load on-site monitoring data. Research results can provide reference for future tunnel and underground engineering support design, and meanwhile, the engineering cost can be effectively reduced.

The present invention relates to the field of mine engineering support installation technology, in particular, it relates to a flexible injection pressure anchor rod. Said invention adopts high-elasticity high-molecular material as main body material of anchor rod. Said anchor rod body is made into hollow structure, its hollow portion is a liquid-injecting (gas-injection) cavity, its one end is closed and the other end is equipped with an injection non return valve, its anchor rod body is made up by using steel wire or fibre material and high-elasticity high-molecular material and adopting intensive compounding process, and its injection non return valve is made up by using rigid material or elastic material.

The invention discloses a FRP hollow grouting anchor rod with steel strand embedded therein. The hollow grouting anchor rod comprises a hollow threaded rod body, a nut, a backing plate, a grouting plug, a connecting sleeve and an anchor head; the threaded rod body comprises a steel strand The wire, the FRP layer and the sand on the surface of the FRP layer. Embedding thin steel strands in FRP hollow bolts can comprehensively utilize the respective advantages of FRP and steel strands, fundamentally solve the problems of easy corrosion, poor durability and high quality of steel strands in underground engineering, and improve the elasticity of FRP Mechanical properties of low modulus, large deformation and brittle failure. FRP hollow grouting bolts with the advantages of light weight, high strength, high elastic modulus, high ductility, high cost performance and excellent corrosion resistance are prepared. The surface of the FRP hollow grouting bolt is wound into a thread shape with fiber filaments and sand is glued on the surface to ensure the reliable bonding between the bolt and the concrete. The hollow grouting bolt is suitable for underground engineering support systems with high requirements on mechanical properties and corrosion resistance, and has wide application prospects.

The invention discloses a novel construction engineering supporting device. The novel construction engineering supporting device comprises a first assembly, a second assembly and a third assembly, thefirst assembly is provided with a supporting base and a first supporting column, and the middle of the supporting base is provided with a first supporting column fixator which is located in a grooveof the supporting base; the first supporting column fixator is internally provided with fixing grooves, and the middle of a fixing groove of the first supporting column is provided with a trapezoidalrotating-stopping protrusion; the second assembly comprises a second supporting column and a half-arc-shaped spherical seat, and one end of the second supporting column is located in the first supporting column; and the third assembly comprises a third supporting column, a supporting surface and a spherical connecting piece. The novel construction engineering supporting device has the very good effect when arc face supporting is conducted, an included angle between the spherical connecting piece and the half-arc-shaped spherical seat can be changed freely, the applicability is high, and the novel construction engineering supporting device has the advantages of being simple in structure, convenient to use and good in using effect.

The invention discloses an electric power engineering support, which comprises a shell, wherein anti-shaking mechanisms are arranged on the two sides of an inner cavity of the shell correspondingly; transmission mechanisms are arranged on the two sides of the back face and the two sides of the front face of the inner cavity of the shell correspondingly; a movable plate is arranged at the bottom ofthe inner cavity of the shell; an anti-shaking mechanism, a limiting sliding groove and a pulley are arranged to improve the stability of the movable plate when the movable plate is adjusted and used, and the movable plate is prevented from shaking; a fixing block and an L-shaped clamping block are arranged, the locking and fixing effects are achieved on a rotating disc in the use process; a transmission mechanism, a first bearing seat, a rotating shaft, a gear, a groove and a rack plate are arranged, the effects of stable movement and smooth sliding of a movable column during movement are achieved; and through arrangement of a locking mechanism, a second bearing seat, a screw, a thread, a push plate, a push rod and a fixing pin, the gear is locked and fixed during use, the gear is prevented from rotating, and the advantages that the use height can be adjusted, and the telescopic stability is good are achieved.

The invention relates to a high-pressure low-temperature triaxial corrosion experimental device, and aims to provide a high-pressure low-temperature triaxial corrosion experimental device which is simple in structure and convenient to operate to provide experimental basis and basic data for accurately understanding deep karst development characteristics and provide scientific basis for subsequent necessary engineering supporting measures. The device is fixed on an experiment table, and is characterized by comprising a confining pressure bin seat riveted with the experiment table, a confining pressure bin cover fixedly riveted on the top of the seat, and an axial load server arranged above the bin cover, wherein the outside of the confining pressure bin seat has a circular truncated cone shape, and a hollow cylindrical confining bin is formed in the confining pressure bin seat; the confining pressure bin cover is a flat plate and is provided with a through hole of which the diameter is matched with that of a sample; and the axial load server consists of two cylinders with different diameters, and a pressure gauge is arranged in an upper cylinder with a large diameter and is communicated with the confining pressure bin below through a pipeline. The high-pressure low-temperature triaxial corrosion experimental device is suitable for underground engineering such as hydraulic and hydro-power engineering, traffic and mines.

The invention relates to the technical field of engineering supporting, in particular to a pressing seam type friction type constant-resistance anchor rod. By means of the anchor rod, the technical problems that in the prior art, the ultimate tensile length of an anchor rod is small, function overload failure occurs easily, and the flexible supporting capacity is not achieved are solved. The anchor rod structurally comprises a sleeve, a rod body, a tray and a pressing block. The rod body comprises an entity segment, a constant-resistance segment, a conical segment, a friction resistance segment and a free segment from top to bottom. The entity segment is of a cylindrical solid structure. The side walls of the constant-resistance segment, the conical segment and the friction resistance segment are provided with gaps with the same width from top to bottom in the axial direction. The outer diameter of the constant-resistance segment is larger than that of the friction resistance segment. The outer diameter of the axial section of the rod body gradually diseases continuously and is in transition to the outer diameter of the friction resistance segment from the outer diameter of the constant-resistance segment in the axial direction through the conical segment The sleeve comprises a rough-hole segment, a conical-hole segment and a thin-hole segment and is matched with the rod body in inner diameter. The anchor rod is not damaged when a surrounding rock is greatly deformed, larger displacement of the rod body is allowed so as to adapt to deformation of the surrounding rock, the surrounding rock deformation energy can be continuously absorbed, and the stability of the surrounding rock is maintained.

The invention provides underground engineering rock burst geological disaster passive prevention and treatment equipment and a using method thereof, and relates to the technical field of underground engineering protection. The equipment comprises a passive protection mechanism, a telescopic device, a supporting structure and a walking mechanism which are arranged on the surface of a surrounding rock in sequence from outside to inside. The passive protection mechanism comprises a positioning column arranged in the radial direction and an energy dissipating net fixed at the outer end of the positioning column. The telescopic device consists of at least two telescopic units arranged in the circumferential direction of the telescopic device. Each telescopic unit comprises a shell body, an air sac installed in the shell body and a fixed pile. The inner end of the fixed pile is fixed at the bottom of the shell body, and the outer end of the fixed pile stretches out of the shell body and is sleeved with the inner end of the positioning column. The air sac is located between the inner wall of the shell body and the outer wall of the fixed pile. According to the equipment, because the energy absorption intensity of an underground engineering supporting and protection system is not enough, a safety accident caused by instantaneous releasing of accumulative energy in a rock when high-intensity rock burst happens is solved effectively, the rock burst harm is reduced to the uttermost extent, and the engineering risk is reduced.

The invention discloses a novel construction engineering supporting device. The structure of the device comprises a telescopic spring, a connecting steel board, an adjustable support, a lifting pull rod, a steel wire, slanting rods, a locating board, an reinforced rod, a pedestal, an strengthening ring and a vertical upright rod; according to the novel construction engineering supporting device, an installation frame is installed on the edge of the lateral section of the top of the upright rod through four bolts on the frame, a connecting shaft is inserted into the side of a press cover so that the connecting shaft can be matched with the installation frame to support the whole adjustable support, a connector part of the steel wire is connected with a wire collecting rod, by guiding a piston to operate linearly in a piston air cylinder back and forth, thermal energy is transformed into mechanical energy through expansion of air in the cylinder, a rolling bearing is driven to rotate bya clamp spring, so that the press cover rotates backward, and the wire collecting rod is pulled to make the steel wire to retract inward; the body of the supporting frame is lengthened to support floors with different heights, so that the number of resources of used steel is lowered.

The invention relates to a preparation method and application of a multilevel orientation porous superfine electric spinning composite fiber membrane. The method comprises the following steps of firstly adding reducing graphene into a dichloromethane solvent to perform ultrasonic dispersion, then adding reducing graphene dispersion liquid and polylactic acid into an airtight vessel which containsdichloromethane, stirring and performing ultrasonic treatment to prepare a macromolecular solution; in a condition of certain relative humidity, putting the prepared macromolecular solution in an airtight injection syringe, spinning on an electrostatic spinning device to form the multilevel orientation porous superfine electric spinning composite fiber membrane with a stable segment which has a length of 20cm or more. The method can be used for solving the problems that in the prior art, the fiber membrane is poor in electrical performance, the dispersion of graphene is not uniform and the biological activity is low, according to the fiber membrane prepared in the invention, the fiber diameter is relatively fine and can be up to 369-2,350nm, the fiber is in orientation arrangement, the fiber surface has an orientation hole structure, the orientation growth and distribution of cells can be adjusted and controlled, the fiber membrane has relatively high mechanical performance, the fiberbreaking strength is 70-122MPa, and the fiber membrane is mainly applied in biological tissue engineering support materials.