52results about How to "Improve residual strength" patented technology

The invention discloses a rapid-hardening inorganic filling support material for mine. The support material consists of a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 93-97 parts of sulphoaluminate cement clinker, 2-5 parts of an XWZ-A type compound admixture, 0.01-0.1 part of an air entraining agent, 0.0-0.05 part of an air entraining admixture, 0.2-1.0 part of a foam stabilizer and 0.25-2 parts of fibers; and the component B comprises the following raw materials in parts by weight: 75-88 parts of gypsum, 10-25 parts of lime, 2-5 parts of an XWZ-A type compound admixture, 0.01-0.1 part of an air entraining agent, 0.0-0.05 part of an air entraining admixture, 0.2-1.0 part of a foam stabilizer and 0.25-2 parts of fibers. The prepared filling support material disclosed by the invention has the characteristics of quick setting property, lightweight, rapid hardening property, early strength, high compressibility, high residual strength, good gas tightness and the like, and is particularly suitable for the mine filling support aspect.

A method for the friction stir welding of two components, in particular of two shell components of a fuselage structure of an aircraft and spacecraft, said method comprising the following method steps: positioning the two components relative to one another in such a way that a connection region is formed between the two components; friction stir welding the two components by means of a friction stir welding tool which penetrates the connection region in order to produce a weld which permeates the connection region with the formation of an unpenetrated weld edge portion of the connection region; and introducing internal compressive stresses, at least in the weld edge portion of the connection region. Further a device for the friction stir welding of two components, in particular of two shell components of a fuselage structure of an aircraft and spacecraft is provided.

The invention discloses a wear-resisting high-strength cable produced by a non-single material and a preparation method of the wear-resisting high-strength cable. A cable body is an 8-strand structure core body which is prepared from ultra-high molecular weight polyethylene (UHMWPE) and high-strength polyester according to the amount ratio of 3 to 1; a high-toughness wear-resistant coating woven by adopting vectran fibers is arranged outside the core body; and a wear-resistant coating which is especially made of a wear-resistant material PTFE as a matrix coats the outer surface of the sleeve; the preparation method comprises the following steps: fabricating a cable body by the procedures of preparing roving, preparing rope yarns, infiltrating resin, preparing rope strands, braiding ropes, prestretching and drying; weaving a high-strength wear-resisting sleeve on the surface of the core body; and dipping and coating a wear-resisting coating which is especially prepared from PTFE as a matrix on the outer layer of the sleeve.

The present invention relates to a short fibre reinforced lime soil ground base treatment method. It is characterized by that it makes the short fibre and lime be mixed in the engineering soil so as to improve the engineering property of soil, and can be used for making ground base treatment. The fibre content is 0.05-0.5% of dried soil weight and the lime content is 1-10% of dried soil weight, the fibre length is 2mm-30mm. Said soil in which the short fibre and lime are mixed is undergone the processes of stirring, stacking and rolling so as to form the invented short fibre reinforced lime soil ground base.

The invention discloses a microbial curing-fiber reinforcement combined sandy soil modification method and belongs to the field of geological engineering-microbial interdiscipline. The method comprises the steps as follows: 1) adding a fiber material to sandy soil, adding water, performing uniform stirring, putting the mixture in a mold, and leaving the mixture to stand and drying the mixture after compacting and filling the mold; 2) activating a microbial solution with mineralization; 3) soaking the sandy soil in the activated microbial solution; 4) transferring the treated sandy soil to a maintenance device, and filling the maintenance with a gluing solution for gluing and curing. An MICP technology and a fiber reinforcement technology are combined to modify the sand soil, so that loosesandy soil is cured, the forming strength is improved, meanwhile, brittleness of a sandy soil cured body can be significantly reduced and residual strength and toughness of the sandy soil cured body can be improved due to addition of the fiber, the engineering properties of traditional MICP cured sandy soil are improved as a whole, and the method has great significance in further improving safetyand stability of engineering structures.

The invention discloses a pressure-bearing type end-anchoring high-pretightening-force anchor rod support method which is applicable to surrounding rock support in mine sinking and driving engineering. According to the method, at the end of the hole bottom, an anchor rod is fully adhered to surrounding rocks of the bottom of an anchor rod hole through a resin cartridge, and end anchoring effect is realized; a PVC (polyvinyl chloride) sleeve or a sleeve made of similar materials is mounted on an anchor rod body of a free section, a space between the sleeve and the anchor rod hole is filled with cement mortar, a cement mortar body is fully adhered to surrounding rocks of the anchor rod hole, and the cement mortar body cannot be adhered to the anchor rod due to the sleeve, so that pretightening force can be ensured to be applied to the anchor rod at different time periods, and the pretightening force of the anchor rod can be remarkably increased; particularly, under the condition of weak surrounding rocks, the cement mortar body of the free section can bear the pretightening force if an anchoring section at the resin end is displaced, so that support efficiency of the pretightening-force anchor rod is guaranteed to the greatest extent, and stability and safety of surrounding rocks of deep tunnels are facilitated.

The invention relates to the field of coal mine timbering and particularly relates to a filling bag body, a timbering and filling column and a construction method. The filling bag body comprises a first flexible bag body, a second flexible bag body and a diaphragm, wherein the diaphragm is located between the first flexible bag body and the second flexible bag body, a steel hoop is sewed to the periphery or an interlayer of the second flexible bag body, grouting holes are respectively formed in the upper parts of the outer side walls of the first flexible bag body and the second flexible bag body, and an exhausting holes are formed in the top end surface of the first flexible bag body; through holes are formed in the diaphragm; and a plurality of hanging lugs are arranged in the peripheraldirection of the second flexible bag body. The timbering and filling column comprises a first strut section, a second strut section and the filling bag body, wherein the first strut section is constructed by a first rapid setting material, and the second strut section is constructed by a second rapid setting material. The working procedure for constructing the filling column by virtue of the filling bag is simple, the filling column is rapidly formed, and meanwhile, the heights of the first strut section and the second strut section can be precisely controlled.

The invention discloses a method for reinforcing aeolian sandy soil by polypropylene fibers. The method comprises the following steps: selecting materials for preparing fiber aeolian sandy soil, wherein the length of the polypropylene fiber is 18mm, the mix ratio of the fiber is 0.3 percent, and the aeolian sandy soil materials are air-dried aeolian sand or aeolian sandy soil (the moisture content accounts for 11.2wt%); according to the proportioning scheme, closely and completely mixing fine TEXSOL with aeolian sandy soil particles by way of spraying, so that a composite three-dimensional spatial structure is formed by the TEXSOL and the aeolian sandy soil; and carrying out mechanical compaction on the composite fiber aeolian sandy soil subjected to spraying, wherein the compaction method and standard of the composite fiber aeolian sandy soil are same as those of common soil, so that the compaction density of the aeolian sandy soil reaches 100 percent of the standard compaction density, and the fiber aeolian sandy soil is compacted closely. By utilizing the method in earth-filled dams, retaining walls and the drainage works of the earth-filled dams, the water stability of the interior of the soil body can be effectively improved, the shearing strength and tensile strength of the soil body can be obviously improved, and the construction process is simple; and because the fiber content of the fiber aeolian sandy soil is very low, the method has the advantages of cheapness and environmental protection.

The present invention relates to rotary wing of simulation helicopter and its making process and curing mold. The rotary wing includes carcass and covering, and the covering includes at least one closed reinforcing layer of reinforcing material carbon fiber, aramid fiber, polyethylene fiber, titanium foil and/or glass fiber. The making process includes making carcass, making covering and pressing to integrate the carcass the covering. The curing mold is one combined mold including upper mold and lower mold and with notch, positioning lobe and dovetail groove. The technology of the present invention may be used in making various kinds of simulation flyers.

The invention discloses a post-peak fractured rock triaxial slurry permeability test system and method. The system comprises a permeation system, an axial loading system, a circumferential loading system, a grouting pressure system and a data acquisition and analysis system. The method comprises the following steps: 1, debugging the test system and checking the running condition of the test system; 2, mounting a rock sample; 3, starting and setting the axial loading system; 4, starting and setting the circumferential loading system; 5, fracturing the rock sample to a post-peak fractured state;6, carrying out a grouting permeability test on the rock sample in the post-peak fractured state; 7, ending the test; 8, processing the test data. The permeability change characteristics of the slurry in the rock post-peak fracture process can be effectively determined; and the problems of unsmooth permeation of slurry in the fractured rock sample, easy blockage of the pipeline, non-uniform pressure action of the slurry, difficulty in confining pressure control, difficulty in sealing implementation and the like in triaxial slurry permeability test of different post-peak fractured state rockscan be greatly solved.

A metallic structural component for an aircraft includes stiffening profile members integrally formed or connected onto a skin sheet. Each stiffening profile member includes a first part integrally connected to the skin sheet, and a second part non-integrally connected to the first part so as to form an internal boundary surface within the multi-part stiffening profile member. If a crack forms in the skin sheet and propagates into the first part of the stiffening profile member, the internal boundary surface resists the further propagation of the crack past this boundary surface. The crack propagation resistance is improved, the remaining strength of the structural component after formation of a crack is increased, and the overall structural component is light in weight. The outer contour of the stiffening profile member is not affected by the provision of the separate first and second parts or the internal boundary surface therebetween.

The invention discloses a warship board multilayer anti-detonation protection structure. The warship board multilayer anti-detonation protection structure comprises a double-layer shell, a void compartment, a first liquid compartment and a second liquid compartment, wherein the double-layer shell, the void compartment, the first liquid compartment and the second liquid compartment are sequentially ranked from the outer side of a warship body to the inner side of the warship body, the water filling height h of the first liquid compartment and the water filling height h of the second liquid compartment are 70%-80% of a compartment height H, the void compartment is separated from the first liquid compartment through a first compartment separation plate, the first liquid compartment is separated from the second liquid compartment through a second compartment separation plate, the second liquid compartment is separated from an inner compartment of a warship through a third compartment separation plate, and the side, towards a compartment body, of the second liquid compartment is fixedly connected with a plurality of longitudinal box girders which are vertically ranked at intervals. The warship board multilayer anti-detonation protection structure with the structural style has the advantages of being light in weight, good in anti-detonation performance, high in residual intensity and the like, when a warship board is impacted by detonation, most detonation impact energy can be absorbed, the compartments of the warship are prevented from being damaged, and personal losses are avoided.

The invention discloses a shock-absorption expansion filling material used for filling a deep goaf and a preparation method in order to solve the problem that filling cannot realize roof contact after the underground goaf is filled with a conventional filling material. The shock-absorption expansion filling material is composed of a base material and other material, and the base material comprises, in percent by mass, 53.60%-64.89% of mine tailings, 7.44%-14.60% of a gelling material, and the balance water. The other material is prepared from the following raw materials in percent by mass: 3.75%-8.75% of hydrogen peroxide, 2.00%-6.00% of a stabilizing material, 8.00%-12.00% of calcium sulphoaluminate, 1.00%-3.00% of a retarding material, and 2.00%-4.00% of gypsum. The preparation method comprises selection of the materials, proportioning of the ingredients, molding and molding maintenance. Because of the special pore structure, the shock-absorption expansion filling material possesses the advantages of obvious shock absorption performance, relatively good fluidity, excellent expansion performance and the like, and is especially applicable to filling of the metal mineral deep goaf.

The invention relates to an explosion venting bulkhead structure with unequal intensity of a naval vessel cabin. The explosion venting bulkhead structure consists of an explosion venting plate, reinforcing ribs and corner connecting structures with unequal intensity, wherein the explosion venting plate is used for being damaged rapidly when an explosion occurs in the cabin to release pressure in the cabin; the reinforcing ribs are arranged on the inner side of the cabin, and are used for supporting the explosion venting plate and guaranteeing the residual intensity of a vessel body after the explosion venting plate is damaged; and the corner connecting structures with unequal intensity are arranged between the explosion venting plate and a strong bulkhead structure of the cabin, and are used for connecting the explosion venting plate and the strong bulkhead structure of the cabin, and guaranteeing that damage occurs on one side of the explosion venting plate when the explosion occurs in the cabin. Under the load of the explosion in the cabin of the naval vessel, the structure can be rapidly damaged to relieve pressure, so that the intensity and the energy of explosion products are dissipated through spatial distance and volume attenuation, the pressure of quasi-static air pressure is dispersed and reduced, the situation that the strong bulkhead structure of the cabin is integrally destroyed is avoided, and the residual intensity of the naval vessel structure is greatly improved.

A multi-pass gas metal arc weld (“GMAW”) approach is used for in-situ repair of railhead defects. A defect is removed via machining a perpendicular slot or grove in the railhead leaving the web and base unaltered. A sufficient number of GMAW passes are used to fill the slot using a weld material suitable for the particular type of parent steel, and excess weldment can be removed. Optionally, for pearlitic steel rails post-weld heat treatment can be used to cause austenization and/or quenching of the weld. The weld heat inputs and other parameters are controlled to avoid ductile and brittle fracture related morphologies.

The invention discloses a lightweight thermal-insulation concrete, which is composed of the following raw materials in parts by weight: 70 to 120 parts of cement, 20 to 30 parts of lime, 20 to 80 parts of sand, 30 to 50 parts of coal slag, 25 to 55 parts of aluminium metallurgy slag, 40 to 80 parts of polypropylene fiber, 40 to 70 parts of foaming agent, and 50 to 90 parts of water; wherein the foaming agent is composed of plant-origin fatty acid, and is very safe. The provided concrete has the advantages of cheap raw materials, simple production technology, lightweight, thermal insulation property, energy saving, and environment-friendliness.

The invention discloses a band type wangeviry mining technology branch entry supporting method. The band type wangeviry mining technology branch entry supporting method comprises three steps for completing supporting work: preliminary supporting is performed during branch entry tunneling, screw-thread steel anchor rods and anchor ropes are arranged on top plates, and glass anchor rods are arranged on two sides; after the preliminary supporting is completed and first mining pit excavation is completed, anchor rods are hit on one side coal wall close to an unexcavated mining pit to improve the residual strength of a coal body and provide a certain supporting role on excavation activities of an adjacent mining pit; after the excavation close to the mining pit is also completed, an inter-tool coal pillar with the width of 2 m is reserved between the two mining pits, and double-pretightening-force anchor rods are hit on the coal pillar; then, the operation is cyclically performed with completion of excavation of the mining pits till the excavation works of all mining pits in a branch entry are completed. The band type wangeviry mining technology branch entry supporting method can improve the residual strength of the inter-tool coal pillar left after the excavation of the mining pits is completed, improves the residual strength of the inter-tool coal pillar and the stability of a branch entry roadway, decreases supporting pressures of adjacent unexcavated mining pits and facilitates earth's surface subsidence control and earth's surface building (construction) protection.

The invention discloses a high-residual-strength phenolic flame-retardant system glass fiber reinforced plastic material and a preparation method thereof. The high-residual-strength phenolic flame-retardant system glass fiber reinforced plastic material is prepared from the following components in parts by weight: 20-30 parts of a component A and 60-70 parts of a component B, wherein in the component A, the mass ratio of phenolic resin to modified siloxane resin to glass powder to graphite to white carbon black to a curing agent to an accelerant is 1 to (0.4 to 1.1) to (0.1 to 0.2) to (0.01 to0.08) to (0.005 to 0.01) to (0.01 to 0.02) to (0.01 to 0.02); the B component is E glass fiber. According to the invention, the phenolic resin, the modified siloxane resin, the glass powder, the graphite, the white carbon black, the curing agent, the accelerant and the E glass fiber are used as raw materials in a matching manner, so that the obtained high-residual-strength phenolic flame-retardant system glass fiber reinforced plastic material has better high-temperature resistance and flame retardance, the oxygen index exceeds 60%, and the high-temperature residual strength can reach 72 MPa.The preparation method of the high-residual-strength phenolic flame-retardant system glass fiber reinforced plastic material provided by the invention is simple to operate and high in safety.

The invention discloses a cement concrete pavement resonance crusher. The crusher comprises a machine body, wherein a cab is arranged at the top of the machine body, a water tank and travelling wheelsare arranged at the bottom of the machine body, the water tank is positioned on one sides of the travelling wheels, a supporting box is arranged inside the machine body, a first supporting seat is arranged at the top of the interior of the supporting box, a second supporting seat is arranged at the position of the side, close to the first supporting seat, of the bottom of the interior of the supporting box, one end of the first supporting seat and one end of the second supporting seat are rotationally connected with a resonance beam through rotating shafts, and a rod hole is formed inside theresonance beam. According to the crusher, a vibration excitation eccentric wheel rotates to generate eccentric force, vibration energy is transmitted to a crushing hammer through the resonance beam amplitude modulation and frequency modulation, so that the vibration frequency of the crushing hammer reaches the inherent frequency of a cement panel, a plate resonates and rapidly cracked, and the cement concrete plate is promoted to be subjected to resonance cracking, and therefore cracked but not broken.

The invention discloses a cementing and curing method and a cementing and curing material prepared by the method. The cementing and curing method comprises the following steps: A, uniformly mixing a solid base material, active magnesium oxide and fibers to prepare a solid mixture; B, adding urea into a bacterial liquid to prepare a liquid mixture, wherein the bacterial liquid contains urease-producing bacteria; and C, uniformly mixing the solid mixture and the liquid mixture to form slurry, and performing maintenance and curing. In the step A, the fiber accounts for 0.05-1.5% of the volume of the solid mixture. Under the condition that the cost is not obviously increased, the strength and toughness of the cementing and curing material are enhanced.

The invention discloses a fabricated ECC-steel plate combined energy dissipation shear wall. The fabricated ECC-steel plate combined energy dissipation shear wall comprises an embedded steel plate, perforated plate connecting pieces, an outer pouring ECC plate and an edge frame; a vertical seam is formed in the embedded steel plate, and the perforated plate connecting pieces are welded on the embedded steel plate; the ECC plate is bidirectionally provided with reinforcements, and the reinforcements penetrate through holes of the connecting pieces; the combined energy dissipation shear wall is in bolt splicing with the edge frame through angle steel. According to the fabricated ECC-steel plate combined energy dissipation shear wall, as a main lateral force resistant component of a structure, shear bearing capacity is high, resistant-lateral rigidity is high and ductility is good, a concept of multiple anti-seismic defense lines is achieved, and the advantages of being high in durability and good in fire resistance are possessed; meanwhile, massive wet operation on a construction site can be avoided, and construction is convenient and fast.