34results about How to "Settle settlement" patented technology

The invention relates to the technical field of hydraulic engineering full-life-cycle management, in particular to a hydraulic engineering full-life-cycle management method and system based on digital twinning. The method comprises the following steps: acquiring reservoir peripheral data, designing a reservoir dam based on the data, and constructing a three-dimensional model of the reservoir dam; and carrying out reservoir soil condition collection and water fluidity change estimation so as to analyze the soil settlement condition. According to the water fluidity change data and the soil settlement data, calculating water pressure distribution, foundation settlement and reservoir capacity attenuation of the dam; evaluating the efficiency attenuation of the dam generator set, optimizing the dam design, and ensuring the feasibility and efficiency of the design; according to the method, the water conservancy project full-life-cycle management technology is optimized, so that the water conservancy project design is safer and more stable.

The invention belongs to the field of wastewater treatment, and provides a tunnel construction wastewater treatment method, which uses a system, the system comprises a secondary sedimentation tank, a tertiary sedimentation tank, an integrated device, three on-line sensors for wastewater pH value monitoring and two on-line sensors for wastewater SS value monitoring, the system further comprises a pH first-stage adding device, a pH second-stage adding device, a coagulant adding device and a flocculant adding device, and the online sensor and the adding devices are electrically connected with the controller. According to the treatment method provided by the invention, the dosage of chemicals can be accurately metered according to the change of the concentration and the water quantity of the tunnel construction wastewater, the concentration of the chemical liquid is automatically configured, the flow of the chemical liquid is accurately controlled, and real-time adjustment can be realized according to the change of the water quality and the water quantity of the wastewater. According to the treatment method, a dead-corner-preventing wastewater treatment device is used, so that the problems of sludge deposition and hardening at the bottoms of tank bodies of the coagulation tank and the flocculation tank, especially at the four corners of the tank bodies can be effectively solved.

The invention discloses a shield deslagging volume and soil bin pressure double-controlled land subsidence self-adaptive regulation and control method, and belongs to the technical field of underground engineering construction. The method comprises the following steps: S1, data acquisition of monitoring equipment and various sensors; s2, constructing and calibrating an initial model; s3, setting and executing an initial regulation and control strategy; s4, adaptive regulation and control and model optimization are carried out; s5, automatic early warning and manual intervention are carried out; and S6, regulation and control effect verification and construction adjustment are carried out. According to the method, by monitoring the deslagging volume and the soil bin pressure in real time and combining multiple factors such as geological conditions and shield tunneling machine parameters, the deslagging speed and the soil bin pressure in the construction process are automatically adjusted, so that ground subsidence is reduced, and the construction safety and precision are improved. The device is used in the shield construction process, and self-adaptive regulation and control of ground subsidence are achieved through dual control over the deslagging volume and the soil bin pressure.

The invention discloses a top-down construction method for underground sealing wall roof contact. The top-down construction method comprises the following steps that S1, a reasonable position is selected as a sealing wall site; s2, selecting construction parameters of the sealing wall according to a design process; s3, carrying out picking, stripping and bottom shoveling on the roadway at the position of the closed wall; s4, groove cleaning and reinforcing mesh construction; s5, mounting a water filter pipe; s6, formwork erecting and pouring are conducted; and S7, concrete curing. According to the reverse construction method, the upper half portion of the sealing wall is firstly poured, then the lower half portion of the wall body is poured, concrete is poured in time during reverse construction, the functions of a roadway top plate inclined face and a formwork inclined face can be effectively achieved, the dead weight of concrete is better utilized, the concrete on the contact face is compacted, and therefore the better sealing effect is achieved. The combination face between the wall body and the top plate is creatively divided into two inclined faces, self-compaction of concrete is achieved, key parts for sealing water leakage of the wall are blocked, the construction cost is saved, the construction time is shortened, and the method is simple, efficient and practical.

The utility model discloses a photovoltaic pile, which relates to the technical field of photovoltaic power generation and comprises a pile body, a supporting mechanism is arranged on the outer side wall of the pile body and comprises a fixing ring, a supporting rod and a supporting foot, the fixing ring is fixedly sleeved on the outer side wall of the pile body, and two ends of the supporting rod are respectively and rotatably connected with the fixing ring and the supporting foot. A limiting mechanism used for limiting the rotating angle of the supporting rod is arranged on the outer side wall of the pile body and comprises a sleeve, a sliding ring, a pull rope and an adjusting ring, the supporting rod and the supporting feet are opened outwards to be supported on the ground so as to support the pile body, rotation of the supporting rod is limited through the limiting mechanism, and the pile body is prevented from settling in the ground; the problem that after an existing photovoltaic pile is installed, the photovoltaic pile can be settled in the ground under the conditions that a foundation is not uniform and unstable and external acting force is encountered is solved.

The invention discloses a magnetorheological fluid aircraft landing gear buffer strut, comprising an outer cylinder, an inner cylinder, a floating piston, a piston rod, an electromagnetic control assembly, a liner and an oil needle; the inner cylinder is located inside the outer cylinder; the floating piston is installed between the inner cylinder and the outer cylinder; the lower end of the inner cylinder extends into the piston rod; the piston rod extends from the outer cylinder; the electromagnetic control assembly is installed on the closed end of the piston rod; the electromagnetic control assembly generates a magnetic field after being energized; the upper end of the liner is sleeved on the inner cylinder, and the lower end is installed on the electromagnetic control assembly; the oil needle comprises an upper cut-off section and a lower cut-off section connected at both ends of the middle section; the invention can meet various complex working conditions faced by aircraft landing, that is, it can meet the aircraft landing shock requirements, and can also effectively reduce the overall natural frequency, and better isolate the vibration from the ground during the taxiing process.

The invention discloses a shear thickening fluid with a magnetorheological effect and a preparation method thereof, and belongs to the technical field of intelligent materials. The magnetorheological shear thickening fluid consists of the following components in percentage by mass: 15-30% of polyethylene glycol, 15-30% of spherical silicon dioxide and 50-65% of magnetic particles. The preparation method of the magnetorheological shear thickening fluid comprises the following steps: mixing the polyethylene glycol and the spherical silicon dioxide to prepare the shear thickening fluid, adding the magnetic particles, and mixing again to obtain the magnetorheological shear thickening fluid. The raw materials of the magnetorheological shear thickening fluid are easy to obtain, safe and reliable; the preparation method is short in technological process, simple and safe to operate and wide in applicability. The magneto-rheological shear thickening fluid can unify the rate sensitive characteristic of a shear thickening material and the magneto-sensitive characteristic of a magneto-rheological material into a whole, and provides material support for research and development of a damping execution device with self-adaption, self-enhancement and self-adjustment functions and application of the damping execution device to an important engineering structure.

The invention discloses a deep foundation pit outer confined aquifer recharge system adjacent to an existing building and an operation method, the system comprises the existing building, a foundation pit and a waterproof curtain, a recharge well hole is arranged between the existing building and the waterproof curtain, a pressurization recharge system is installed in the recharge well hole, and the pressurization recharge system is connected with the existing building. The pressurization recharge system comprises an adjustable recharge device, a pressure detection unit, a control unit and a data acquisition unit. The data acquisition unit comprises a plurality of soil permeability sensors and a plurality of water level sensors; the control unit carries out processing according to information measured by the pressure detection unit and the data acquisition unit and controls the pressurization recharge assembly to inject corresponding water into the recharge well hole. The operation method comprises the steps of recharge well hole construction, adjustable recharge device installation and pressurization recharge operation. The system can avoid the problem that the water level of the confined aquifer outside the foundation pit is reduced so as to influence the safety of the existing building under the condition of ensuring the safety of the foundation pit without sudden gushing, is simple and reliable in construction method and low in cost, and has relatively strong popularization significance.

The invention relates to the technical field of composite electroplating, in particular to an electroplating method for preparing a high-wear-resistance self-lubricating plating layer, which comprises the following steps: firstly, carrying out pretreatment of oil removal and acid pickling activation on a metal workpiece; then preparing a nano composite nickel plating solution in which a nickel plating basic solution contains a nano particle composite phase subjected to pre-dispersion treatment, and the total concentration of composite particles is 10-60g / L; then the dispersion stability of the nano-composite nickel plating solution is maintained in a circulating filtration and mechanical stirring combined mode, and the pretreated workpiece is electroplated; and finally, after electroplating is completed, the workpiece is cleaned and dried. According to the electroplating process for preparing the nickel-based composite coating with high wear resistance and low friction coefficient, the pulse current is adopted, and the high instantaneous current density and turn-off time of the pulse current are utilized, so that desorption and rearrangement of adsorbed particles are facilitated, uniform embedding of the particles is promoted, nickel matrix crystal grains are refined, and the compactness and comprehensive mechanical properties of the coating are further optimized.

The invention discloses a horizontal bullet tank ring-wrapped sand filling stabilization process. On the basis of the original technology, the dynamic load of the sand bed when the equipment is in place is improved by changing the sand bed type, redesigning the sand bed stability structure, setting a crushed stone drainage layer, adding a concrete top cover and other measures, effectively ensuring the bearing capacity of the sand bed, enhancing stability, preventing lateral stress, preventing the tank body from deflecting, ensuring the quality of the sand bed, reducing the construction workload in terms of economic benefits, effectively extending the service life of the bullet tank, reducing costs, meeting the requirements of short construction period, high efficiency and fast speed, and providing a new construction method for stabilizing large horizontal containers.

The present invention discloses a magnetorheological damper with an external active dispersion device, comprising a cylinder, a power device, an electromagnetic assembly and a rotor; the power device is located outside the cylinder; the output end of the power device is connected to the closed end of the cylinder, and the output end of the power device is inserted into the closed end of the cylinder; the electromagnetic assembly is located inside the cylinder; the lower end of the electromagnetic assembly is supported on the closed end; the rotor is located inside the cylinder, and the protruding shaft of the rotor is inserted into the closed end of the cylinder and is fixedly connected to the output end of an external motor; the present invention directly drives the rotor to rotate through the power device, and compared with installing a built-in motor at the bottom of the damper, the problem of weakening the gap magnetic field due to filling the gap between the rotor and the stator with magnetorheological fluid is solved. At the same time, the power device is easy to drive and simple to control.

The invention discloses a production method of 1, 2-propylene glycol, which is characterized by comprising the following steps: respectively and continuously feeding propylene and hydrogen peroxide into a reactor, and reacting in the presence of a titanium silicalite molecular sieve catalyst and a cocatalyst to obtain a reaction product; discharging trace non-condensable gas generated by reaction from the top of the reactor, and feeding a reaction product into a catalyst separator; the reaction product in the catalyst separator is subjected to oil-water phase separation, an upper-layer oil-phase material and propylene together serve as total propylene feed to return to the reactor through a propylene circulating pump, and a lower-layer water-phase material is fed into a membrane filter through a catalyst circulating pump; in a membrane filter, the water-phase material is filtered into a clear solution without the titanium silicalite molecular sieve and a turbid solution containing the titanium silicalite molecular sieve, the turbid solution is cooled by a heat collector and then is circulated back to the reactor, and the clear solution is sent to a reaction product separation system for separation of 1, 2-propylene glycol and reaction by-products.

The utility model provides a kind of well lid anti-settling fixing device.It relates to municipal engineering construction technical field.The well lid anti-settling fixing device includes well slot being opened on ground, annular supporting member is equipped in the well slot, the bottom of the annular supporting member is equipped with positioning ring groove, annular positioning protrusion is fixedly installed on the bottom inner wall of the well slot, the top of the annular positioning protrusion extends into the positioning ring groove, the well slot, annular supporting member and annular positioning protrusion constitute concrete filling cavity between;The top of the annular supporting member is equipped with installation ring groove, well lid main body is equipped in the installation ring groove, the top of the well lid main body is equipped with four first clamping slots being annular array distribution, the top of the annular supporting member is equipped with four second clamping slots being annular array distribution.The utility model has the advantages of simple structure, convenient installation, and stable and reliable anti-settling effect.

The invention relates to the technical field of fire fighting, and provides a durable anti-falling fire extinguisher. The fire extinguisher comprises an aerogel tank body, a spraying channel, a pressing nozzle and a durable anti-falling assembly. The durable anti-falling assembly comprises a rotating rod extending into the tank body, a stirring piece and a driving conversion mechanism for converting external impact into power of the rotating rod. Impact energy such as vibration and falling borne by the fire extinguisher in use and transportation is ingeniously converted into power for driving an internal stirring part to rotate through a mechanical structure, so that an aerogel fire extinguishing agent is continuously stirred, deposition failure of key components is prevented, and the storage life of the fire extinguishing agent is remarkably prolonged to more than 10 years. Meanwhile, impact energy is consumed in the energy conversion process, and the buffering and falling preventing performance is enhanced. Preferably, a self-adaptive buffer assembly based on magnetorheological fluid can be further arranged to cope with extreme impact. According to the invention, the unification of fire extinguishing efficiency persistence and physical durability is realized, and the method is particularly suitable for vehicle-mounted and other scenes with mobile and high-reliability requirements.

The application discloses a method for delivering trace elements to anaerobic fermentation bacteria by coating additives, and the method comprises the following steps: mixing a biomass raw material to be treated and inoculated sludge in a fermentation tank; mixing hydrophobic nanosilica and a metal element ion salt solution, and stirring at a high speed to prepare a slow-release coating additive; adding the prepared slow-release coating additive into the fermentation tank; and setting a fermentation stirring rate to perform anaerobic fermentation. The method can not only gradually release trace metal elements under the action of stirring shear force to improve the biological availability of the trace metal elements, thereby being beneficial to solving the problem that part of the added trace metal element ions is precipitated by other anions in the process of being uptaken by microorganisms, but also can solve the potential heavy metal pollution problem in biogas residue; meanwhile, the method can also solve the biological toxicity problem caused by the prior art, and can effectively promote the anaerobic fermentation biochemical reaction pathway to improve the methane production.

The application provides a lifting machine applying a gear and rack transmission structure and belongs to the field of logistics storage. A driving gear on one side of a loading platform and a rack on one side of a stand column form a lifting transmission mechanism, so as to improve transmission precision, realize accurate butt joint of the lifting machine and a goods shelf, and completely solve the existing defects that the loading platform is prone to subsidence when goods or a shuttle vehicle enters or exits the lifting machine. The lifting machine comprises a base assembly, a stand column frame assembly is fixedly connected to the base assembly, a plurality of counterweight chains and a counterweight assembly are arranged on the inner side of the stand column frame assembly, a loading platform assembly is vertically connected and runs in the stand column frame assembly, and a top frame assembly is arranged on the top of the stand column frame assembly.

The invention discloses an ablation-resistant heat-insulating coating, an ablation-resistant heat-insulating coating and a preparation method thereof, and relates to the field of heat-insulating coatings, self-made modified ablation-resistant light filler, modified closed-cell aerogel light heat-insulating filler, fiber reinforced filler, reinforcing filler and a matrix film forming matter are mixed and cured, and the heat-insulating coating capable of being quickly repaired and formed is obtained. The coating obtained by the prepared coating is based on the modified closed-cell aerogel light heat-insulating filler and the modified ablation-resistant light filler, and can realize non-shrinkage rapid curing and high bonding strength with a base material on the basis of keeping excellent three-dimensional structure and performance, and the temperature-resistant heat-insulating performance of the material is improved. In addition, the coating can also be used for repairing defects of coatings of the same type.

The invention belongs to the technical field of pipeline laying, and provides a gas pipeline construction method which specifically comprises the following steps: S1, foundation treatment, S2, excavation operation, S3, pipeline laying, S4, groove backfilling and S5, pressure testing and monitoring. According to the method, a construction site is comprehensively investigated and evaluated, a foundation is scientifically treated before construction, the bearing capacity of the foundation is guaranteed, excavation is conducted in a mechanical and manual combined mode, the construction efficiency is improved, and the excavation quality is guaranteed; a nondestructive testing and SCADA (supervisory control and data acquisition) system is adopted, so that the construction process of the pipeline can be monitored in real time, online monitoring is performed in later use, and technical guarantee is provided for safe operation of the pipeline; soil humidity is increased through regular watering, raised dust is effectively reduced, a sound insulation barrier is arranged, and noise transmission is reduced.

The utility model provides a roadbed supporting device capable of adjusting settlement, and relates to the technical field of road engineering. A fixed base is fixedly connected to the bottom of the supporting stand column, sliding sleeves are fixedly connected to the top end face of the outer side of the fixed base in an annular array mode, detection sliding rods are slidably connected into the sliding sleeves, sliding detectors are fixedly installed at the tops of the outer walls of the sides, facing the supporting stand column, of the sliding sleeves, and a main supporting assembly is fixedly installed in the supporting stand column. According to the roadbed supporting device capable of adjusting settlement, the detection sliding rod, the supporting spring and the sliding detector are combined, the settlement condition of a roadbed can be monitored sensitively in real time, settlement information is accurately fed back, the friction force between monitoring components is reduced through the design of the sliding friction balls, the accuracy of monitoring data is further improved, and the safety of the roadbed is improved. The hydraulic cylinder and the supporting seat are rotationally connected through the ball socket and the ball head, the height of the supporting seat can be flexibly adjusted, the settlement difference value is compensated, and the problems that stability is poor and settlement is difficult to monitor and adjust are solved.

The utility model relates to the technical field of oil displacement engineering processes, in particular to an oil displacement agent synthesis reaction device which comprises a main body reaction unit, an auxiliary strengthening unit, an energy management unit and an integrated control unit. The main body reaction unit comprises a reaction kettle and a stirring shaft, a kettle cover is mounted at the top of the reaction kettle, and the stirring shaft is vertically mounted in the reaction kettle; three feed ports are formed in the top of the reaction kettle, and a discharge port is formed in the bottom of the reaction kettle; the auxiliary strengthening unit comprises a vacuum pump, a vacuum tank, an air compressor, a gas storage tank, a circulating pipe and a circulating pump. The energy management unit comprises a heating medium storage box, a refrigerant storage box, a temperature sensor A and the like. The main body reaction unit can utilize a stirring shaft under the conditions of constant temperature and constant pressure, and simultaneously assists a vacuum system and a circulating sprayer and an energy control unit in an intensifying system to realize synthesis of the oil-displacing agent and active functional group addition and modification reaction, so that exploration of an oil-displacing agent synthesis process is completed, and a high-performance oil-displacing preparation product is obtained.

This invention relates to the field of batteries, specifically to a lithium battery structure and its application. The lithium battery structure includes: a housing and encapsulated within the housing, a positive electrode strip, a negative electrode strip, a first positive electrode winding / unwinding mechanism, a second positive electrode winding / unwinding mechanism, a first negative electrode winding / unwinding mechanism, a second negative electrode winding / unwinding mechanism, and an ion-conducting medium; the two ends of the positive electrode strip are respectively wound around the first positive electrode winding / unwinding mechanism and the second positive electrode winding / unwinding mechanism; the two ends of the negative electrode strip are respectively wound around the first negative electrode winding / unwinding mechanism and the second negative electrode winding / unwinding mechanism; the ion-conducting medium is disposed in the junction area; the positive and negative electrode strips sandwich the ion-conducting medium. This invention proposes an innovative paradigm at the core structural level of the battery cell, achieving a breakthrough in the inherent safety of lithium-ion batteries without sacrificing energy density, and laying a solid structural foundation for the development of next-generation ultra-high energy density and high-safety battery systems.

The invention provides a suspension filling system and a filling method.The suspension filling system comprises a liquid storage tank, a buffer tank, a filling pump and a filling needle, the buffer tank is provided with a liquid inlet and a liquid outlet, the bottom of the liquid storage tank is connected with the liquid inlet of the buffer tank through a liquid conveying pipeline, the liquid outlet of the buffer tank is connected with the filling needle through a filling pipeline, and the filling needle is connected with the liquid storage tank. The filling pump is arranged on the filling pipeline; the bottom of the liquid storage tank is higher than the liquid inlet of the buffer tank, and the liquid conveying pipeline has an inclined gradient, so that the suspension in the liquid conveying pipeline can flow into the buffer tank under the action of self gravity; stirrers are arranged in the liquid storage tank and the buffer tank, the liquid storage tank is provided with a first valve, the first valve is used for opening or closing the liquid storage tank, the buffer tank comprises a first weighing assembly, and the first weighing assembly is used for measuring the weight of the suspension in the buffer tank. According to the invention, the suspension waste is reduced, and the filling efficiency is improved.

The present invention discloses a bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel and a preparation method thereof, and belongs to the technical field of fiber aerogel. The preparation method of the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel of the present invention comprises the following steps: mixing silica sol and water to obtain a premixed liquid, then adding a hydrophilic colloid and SiO2 nanofibers, mixing evenly, and obtaining a suspension; performing directional freezing on the suspension, and then vacuum drying and sintering to obtain the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel. The present invention utilizes the property that hydrophilic colloids can gel with the change of temperature, and can quickly solidify to form a high-strength gel during the directional freezing process to solidify the fiber matrix and the infrared sunscreen reinforcing phase, and then removes ice crystals and hydrophilic colloids through freeze drying and high-temperature sintering, thereby solving the sedimentation problem of high-density reactants during the freezing process.

This invention discloses a low-temperature high thermal conductivity polymer composite material and its preparation method, belonging to the field of magnetic confinement nuclear fusion technology. This invention uses a specific process to composite a low-temperature high thermal conductivity filler with a polymer matrix. Compared to the microstructure of conventional polymer thermally conductive composite materials, this material has a quasi-continuous thermally conductive network formed by the low-temperature high thermal conductivity filler surrounding the polymer. At low temperatures (e.g., 4K), when the volume percentage of the thermally conductive filler is 50%, it can reach 100 W·m³. ‑1 ·K ‑1 The low-temperature high thermal conductivity polymer composite material of this invention exhibits significantly higher thermal conductivity than other polymer composite materials under the same thermally conductive filler volume percentage. It can be applied in low-temperature heat and mass transfer fields such as superconducting magnets, and possesses advantages such as lightweight, low-temperature resistance, and ease of processing. Furthermore, the preparation method of the low-temperature high thermal conductivity polymer composite material of this invention is simple and reliable, offering significant advantages in mass production.

The invention discloses a terrace system for reducing settlement of a first floor building terrace, which is characterized in that the terrace system comprises a floor slab, a cushion layer, a ring beam, a constructional column, a bearing wall and a foundation beam, the floor slab is arranged at the lower part of the first floor, and the cushion layer is arranged below the floor slab; the ring beams are arranged on the periphery of the floor slab, and constructional columns are further arranged at the corners, the ends and the large-span middle position of the floor slab. The bearing wall is arranged on the lower portion of the ring beam, and a foundation beam is arranged below the bearing wall. Compared with the prior art, the rigid floor slab is arranged, the load of the rigid floor slab is directly transmitted to the pile foundation through the bearing wall and the foundation beam, and a backfill soil layer is completely bypassed. The settlement of the fill stratum has no influence on the surface of the floor (terrace), the problems of terrace settlement and cracking are fundamentally solved, the terrace system is independent, the design is simplified, and the terrace system is a self-contained system, is separated from a main body frame of a building and does not depend on the main body frame of the building. The influence on the design of the main body frame is avoided, and the design calculation of the floor structure is simplified. According to the terrace system, the ring beams and the constructional columns are arranged, so that differential settlement and temperature stress are effectively resisted, the terrace structure is higher in integrity, and the service life is longer.

The application discloses a kind of alicyclic epoxy resin and liquid crystal screen black UV edge sealing glue composition containing it and preparation method thereof.The alicyclic epoxy resin is synthesized by the following resin and monomer reaction, and the molar ratio of reaction is controlled as monomer A:resin B=2.01:1, monomer D:monomer A=2:2.01, and the structure of alicyclic epoxy resin is as follows.By adding the synthesized alicyclic epoxy resin and regulating the proportion of each component in the liquid crystal screen edge sealing glue composition, on the one hand, the powder sedimentation problem of the system is solved, the stability of the piezoelectric valve glue is ensured, and the system reaches a certain curing hardness, on the other hand, the UV cation curing speed and the curing depth under the condition of black system are improved.The preparation method provided in the application has simple operation process, raw materials are easy to purchase, and can be produced and prepared on a large scale.

The utility model relates to the technical field of inspection well lid well ring, concretely is a kind of steel wire rope reinforced glue combination inspection well lid well ring, including positioning rope, the outside of positioning rope is provided with anti-sinking structure, and the anti-sinking structure includes braiding frame, the outside of braiding frame is provided with braiding net, the outside of braiding net is provided with steel rope, the surface of braiding frame is provided with protective layer, the inside of braiding frame is provided with transmission rod, one end of transmission rod is provided with annular spring, the inside of annular spring is provided with spring plate.The steel wire rope reinforced glue combination inspection well lid well ring, by adding positioning rope, play the role of preventing braiding frame inclination, by the cooperation of braiding frame, braiding net and steel rope, play the role of absorbing pressure, by the cooperation of transmission rod and annular spring, play the role of providing force for braiding frame, by the cooperation of spring plate and positioning shaft, play the role of assisting annular spring recovery deformation.

The invention relates to a three-step excavation method for a shallow-buried extremely-soft rock tunnel and a tunnel supporting structure, which ensure that the tunnel is closed to form a ring as soon as possible by strictly controlling the safe step pitch of the tunnel. By means of side wall slotting construction, disturbance of step construction to overall construction of the non-ring-forming tunnel is reduced, structural support of soil in the tunnel is paid attention to in-tunnel soil in the excavation operation process, front-back interference can be effectively reduced, disturbance to stratum soil is relieved, lateral soil pressure and vertical soil pressure in the tunnel excavation process can be effectively resisted through steel pipe pile construction, and construction efficiency is improved. The problems of settlement and large deformation of the tunnel are effectively solved, great potential safety hazards caused by the soft stratum to tunnel construction are eliminated, and the personal safety of constructors and the safety of equipment and property are protected.

The invention relates to a fast ion conductor interface compatibilization ionic conductive binder for a lithium battery and a preparation method of the fast ion conductor interface compatibilization ionic conductive binder. The fast ion conductor interface compatibilization ionic conductive adhesive is obtained by performing surface modification on an inorganic fast ion conductor by adopting a double-bond group-containing coupling agent, and then performing emulsion copolymerization and lithiation neutralization on the inorganic fast ion conductor, a lithiated unsaturated monomer, an acrylate unsaturated monomer and an unsaturated monomer with excellent organic electrolyte resistance. Compared with the prior art, the synthesized ionic conductive binder has excellent dispersion stability and also has excellent ionic conductivity and obdurability, the lithium ion transmission performance in an electrode can be improved, and the capacity of adapting to volume deformation of an active electrode material in the charging and discharging process can be achieved; and the rate capability and the cycle performance of the lithium battery are obviously improved.

The invention belongs to the technical field of copper and copper alloy preparation, and relates to a covering agent assisted ceramic particle reinforced copper-based composite material and a preparation method thereof.The preparation method comprises the following steps that a covering agent is added to the surface of a copper melt, and the covering agent contains boric anhydride and charcoal dust; the time for the ceramic particles to penetrate through the covering agent to enter the copper melt is adjusted by controlling the thickness of the covering agent; and adding ceramic particles, and stirring to obtain the covering agent assisted ceramic particle reinforced copper-based composite material. According to the method, a low-cost atmospheric melting process is adopted to replace vacuum melting, and meanwhile, the problems of sedimentation and agglomeration of high-density ceramic particles in a copper melt are solved through the ingenious design of a covering agent; the core of the preparation method is to control the thickness of a covering agent to adjust the time of particles entering a melt, ensure that the particles slowly pass through a high-viscosity covering layer, and prevent the particles from rapidly sinking to the bottom to form a'dead zone '.