47results about How to "Conducive to waterproof and moisture-proof" patented technology

The invention relates to the field of auxiliary equipment of wall construction, in particular relating to an interlayer heat-insulating structural slab and a manufacturing method thereof. The structural slab comprises at least two structural slab units (1), and is characterized in that each structural slab unit (1) comprises fibers (11), organic resins (12), heat insulating materials (13) and a supporting framework (14), wherein each supporting framework (14) is a prism-shaped or prismatic-table-shaped framework; each edge of each supporting framework (14) is provided with a hook (15); the fibers (11) are connected with the hooks (15); and the organic resins (12) are permeated into the fibers (11) and coated on the external surfaces of the fibers. According to the invention, the engineering period is reduced substantially, the labor intensity is reduced, the structure modulus of walls surrounded by buildings can be improved, and the building quality is enhanced.

The invention discloses a production method for a fireproof, flame-resistant, medium-density fiber closet plate. The method comprises the steps of (1) preprocessing of raw materials, (2) screening, (3) steaming and boiling for softening, (4) grinding, (5) sizing and drying, (6) prepressing, (7) hot pressing, (8) sawing and sanding, (9) veneering and hot pressing and (10) edge cutting. In this way,a finished product is obtained. The method disclosed by the invention is characterized in that eucalyptus barks and branches and waste leftover bits and pieces left after panel manufacture are takenas main raw materials, other miscellaneous wood is added and waste is recycled, so wood resources can be utilized fully and effectively; and modified paraffin and flame-resistant urea-formaldehyde resin adhesive are added, so resistance of the product to fire and flame is greatly enhanced. The medium-density fiber cabinet plate is highly resistant to fire, flame and water and low in the content offormaldehyde, so the product is a safe and environment-friendly closet plate.

The invention discloses a preparation method of super-hydrophobic paper, wherein the preparation method comprises the following steps: step 1, carrying out ultrasonic emulsification on octadecylamineto obtain an octadecylamine emulsion; step 2, uniformly mixing the octadecylamine emulsion with paper pulp in proportion to form an octadecylamine-paper pulp mixed solution; step 3, adding tannic acidand aluminum chloride hexahydrate into the octadecylamine-paper pulp mixed solution, adjusting the pH value, and carrying out a stirring reaction to form tannic acid@octadecylamine microcapsule (TA@ODA) modified paper fiber pulp; and step 4, centrifuging, flattening and drying the paper fiber pulp to obtain the super-hydrophobic paper. Compared with a traditional method, the preparation method ofthe super-hydrophobic paper provided by the invention does not need complex instruments and equipment, does not need a complex synthesis process, does not need too long time, and has the advantages of simple operation, convenience, environmental protection and the like, and the prepared super-hydrophobic paper has good super-hydrophobic performance, good durability and self-repairing performance.

The invention relates to an indoor suspended ceiling gusset plate and a cladding process thereof, wherein the suspended ceiling gusset plate comprises a peripheral frame and an internally-arranged core plate; the core plate is embedded into the frame; the frame is of a rectangular structure formed by sequentially-combined four lines and the adjacent lines are integrally connected through pins; the frame and the core plate are connected via clamping; and the cladding process comprises the steps of respectively preprocessing a base material and a plane materiel, controlling certain process conditions and obtaining a cladded product through a cladding machine. The suspended ceiling gusset plate disclosed by the invention has the advantages that the structure is simple and a separated type structure of the core plate and the frame is adopted, so that the suspended ceiling gusset plate can be separately produced and the industrial volume production is easy to realize; the environmental protection performance is good and PVC (Poly Vinyl Chloride) membranes with various textures, colors and structures or other cladding materials can be adopted to clad, so that the suspended ceilings with various different styles can be formed in the room; in the meantime, the suspended ceiling gusset plate has the performances of good water resistance, moisture resistance, ageing resistance, deformation resistance and the like.

The invention discloses a production method of a fireproof and flame-retardant type medium-density fiber wood floor. The production method comprises the steps of (1) pretreatment of raw materials; (2)screening; (3) stewing softening operation; (4) grinding operation; (5) glue application and drying; (6) pre-pressing operation; (7) hot-pressing operation; (8) sawing and sanding; (9) glue coating and veneering hot-pressing operation; and (10) preservation and grooving, so that the finished product is obtained. According to the production method, the eucalyptus bark, branches and waste leftovermaterials which remain after board manufacturing is accomplished are used as main raw materials, then other miscellaneous trees are added, the waste is turned into the wealth, and therefore the sufficient and effective utilization of timber resources can be achieved; and due to the fact that modified paraffin and flame-retardant urea-formaldehyde resin adhesives are added, the fireproof and flame-retardant performance of the wood floor can be greatly improved, and the produced medium-density fiber wood floor is excellent in fireproof and flame-retardant performance, good in water resistance and low in formaldehyde content, and is a safe, environmentally friendly and durable wood floor.

The invention discloses a powder coating metal overlay decoration plate and a manufacturing method thereof. The powder coating metal overlay decoration plate comprises an artificial plate or natural plate base material, wherein a metal face plate covers at least one surface of the artificial plate or the natural plate base material through an adhesive; a powder coating layer is sprayed on the surface of the metal face plate. The manufacturing method of the powder coating metal overlay decoration plate comprises the following steps: 1. blanking the artificial plate or the natural plate base material and the metal face plate according to dimensional requirements respectively; 2. coating the surface of the metal face plate with powder coating, and heating and solidifying; 3. attaching the metal face plate coated with the powder coating to the artificial plate or the natural plate base material through the adhesive. The characteristics of environmental protection and energy conservation of the powder coating and the mechanical properties of high thermal stability and smoothness of a metal plate material are fully utilized, and the powder coating and the metal plate material are combined, so that the problem that the artificial plate or the natural plate base material is unlikely to be coated with the powder coating is well solved.

The invention provides a multifunctional testing blood collection platform. The multifunctional testing blood collection platform comprises a platform body; a turning cover is movably mounted at the rear end of the platform body; a bracket is mounted between the turning cover and the platform body; the bracket is provided with a protective curtain; foldable supporting rods are arranged at two sides of the bracket; foldable buckles are arranged in the middles of the foldable supporting rods; the lower ends of the foldable supporting rods are arranged in the platform body; a groove is formed in the right side of the platform body; a first storage box is mounted in the groove; a pull handle is mounted on the first storage box; a movable baffle is mounted at the front end of the platform body; an auxiliary frame is mounted at the front end of the movable baffle; a second storage box is arranged at the left side of the platform body; an anti-slipping cushion is laid in the second storage box. When blood of a patient is drawn, a first supporting platform and a second supporting platform are combined together in a manner of forming an obtuse angle and a natural placement habit of arms of a human body is met, so that the comfort in a blood drawing process is enhanced; the first storage box and the second storage box are arranged so that medical personnel can operate conveniently.

The invention provides double-component water-swelling cement gum, which is composed of a component A and a component B. The component A comprises the following raw materials: polyether polyol, isocyanate, surface hydroxyl modified paraffin, epoxy resin, an epoxy diluent, a thickener and a solid filler. The component B is prepared from the following raw materials: polyether polyol, water-absorbentresin, a catalyst, a chain extender, surface hydroxyl modified paraffin, a thickener and a solid filler; wherein the solid filler comprises bentonite modified by a silane coupling agent. According tothe invention, paraffin with certain hydroxyl on the surface is introduced into the two components, so that certain surface lubricity is provided, and a product does not stick to hands of operators during kneading; good weather resistance is realized in various environments. The water-absorbent resin and the silane coupling agent modified bentonite synergistically play a role, so that the bondingstrength between the cement gum and a wall surface is enhanced, and a three-dimensional waterproof sealing effect is formed on a bonding interface, and waterproof and moistureproof effects are betterfacilitated.

The invention provides a fan drainage structure which comprises an annular drainage ditch arranged along a fan tower and radial drainage ditches connected with the annular drainage ditch. The annular drainage ditch is located at the top of a fan foundation, the ditch wall of the annular drainage ditch is connected with the fan tower through a waterproof roll, and the interior of the annular drainage ditch and the interior of each radial drainage ditch are each covered with a waterproof layer. The invention further provides a drainage method of the fan drainage structure. The drainage process is integral, rainwater flowing down along the fan tower can be drained in time through the radial drainage ditches and the annular drainage ditch, the situation that a large amount of rainwater washes soil covering the fan foundation is avoided, and the requirements for the designed covering soil weight and water and soil conservation of the fan foundation are met. In addition, the invention provides a manufacturing method of the fan drainage structure. The manufacturing method is simple and easy to implement.

The invention discloses a composite wallboard and a production process thereof, and relates to the field of wallboards, aiming at solving the problem that in the prior art, the composite wallboard isrelatively single in function; the composite wallboard comprises two face plates and polyphenyl granular concrete filled between the two face plates, wherein the faces plates comprise calcium silicateplates or fiber cement plates. The calcium silicate plates are prepared from the following components: 27-43wt% of a siliceous material, 20-30wt% of a calcium material, 18-32wt% of reinforcing fibersand 10-20wt% of an auxiliary agent; the polyphenyl granular concrete is prepared from the following components: 32-53wt% of polyphenyl granules, 27-43wt% of cement, 10-20wt% of a modifying additive and 5-10wt% of a foaming agent. The composite wallboard has the advantages of being high in strength, firm and reliable, not easy to damage and break, energy-saving and heat-insulated, light in weightand shock-resistant, soundproof and noise reducing as well as waterproof and damp-proof, being hung by using nails or stuck, being slotted for burying wires, being easy to install and decorate, and the like.

The invention relates to a vertical single impeller type flow rate sensing device, which comprises a single impeller, a group of impeller frame, an impeller shaft, a pipe section and a flow rate sensing circuit, wherein the impeller shaft is arranged at the center of the single impeller, the impeller frame is used for fixing the impeller in the pipe section, a plurality of magnets or metal sheets are placed outside the impeller, the outer wall of the pipe section is provided with the flow rate sensing circuit containing a magnetic sensitive element or the flow rate sensing circuit containing an inductor, the flow rate sensing circuit containing the magnetic sensitive element corresponds to the magnets, flow rate sensing circuit containing the inductor corresponds to the metal sheets, the rotation direction of the single impeller is vertical to the water flow direction, and the pipe section is made of plastics. The vertical single impeller type flow rate sensing device has the advantages of few transmission mechanisms, small pressure loss and small startup flow rate, is easy to realize water prevention and moisture prevention, and the flow rate sensing circuit is completely isolated from water.

The invention discloses a production method of a dedicated fireproof flame-retardant medium-density fiber cabinet board. The production method comprises the following steps: (1) raw material pretreatment; (2) sieving; (3) softening through stewing; (4) grinding; (5) gluing and drying; (6) prepressing; (7) hot-pressing; (8) sawing and sanding; (9) veneering hot-pressing; and (10) edge cutting, thereby obtaining the finished product. Eucalyptus bark, branches, and waste leftover materials left in plate manufacturing are used as main raw materials, and other weedtrees are added, so that waste isturned into wealth, and timber resources are sufficiently and effectively utilized; modified paraffin and a flame retardant urea resin adhesive are added, so that the fire resistance and the flame retardation performance are greatly improved, and the manufactured dedicated medium-density fiber cabinet board is high in fire resistance and the flame retardation performance, high in water resistance,and low in formaldehyde content, and is a safe and environmental-friendly dedicated cabinet board.

The invention discloses a fiber grating sensor for microearthquakes and a manufacturing method of such fiber grating sensor. The fiber grating sensor mainly comprises a fiber grating, a vibrating beam, a mass block, a shell, a transmission fiber and a signal demodulator, wherein two ends of the vibrating beam are fixed in the shell, the mass block is fixed in the middle below an axial center line of a vibrating shaft, a set distance is reserved between the mass block and the bottom of the shell, a groove is engraved in the center line of the upper surface of the vibrating beam, the fiber grating is a metal-coated fiber grating, the two ends of the fiber grating are welded in the groove of the vibrating beam, and the transmission fiber is led out of one end of the shell and is used for transmitting a microearthquake signal to the signal demodulator. The fiber grating sensor for the microearthquakes has the advantages of simple structure, convenience in installation, anti-electromagnetic interference and low cost.

The invention discloses a heatable heat-insulating mattress, relates to the field of home textiles, and aims to solve the problems that existing mattresses are easy to dampen, electric blankets have high electricity consumption and are not comfortable to use and the like. The heatable heat-insulating mattress comprises a heating layer, a heat-insulating layer and a bottom layer. The heat-insulating layer is positioned between the heating layer and the bottom layer. Every two different layers are connected through adhesion. The heating layer comprises a heating layer body, heating wires and a switch. The heating layer body is heat conductive silicone rubber. The heat-insulating layer is polyurethane foam. The bottom layer is non-woven cloth.

The invention relates to the technical field of sheets, in particular to an embossed gold printing polyvinyl chloride sheet and a foaming method thereof. The embossed gold printing polyvinyl chloride sheet comprises the following raw materials in parts by weight, 80-120 parts of PVC (polyvinyl chloride) resin, 10-30 parts of filling agents, 20-40 parts of plasticizers, 1-5 parts of heat stabilizers, 1-5 parts of soft modifiers, 1-3 parts of lubricants, 1-3 parts of foaming agents and 1-3 parts of other auxiliaries. The embossed gold printing polyvinyl chloride sheet has the advantages of good three-dimensional effects, soft and comfortable hand feeling, clear grain patterns, gorgeousness, glare, attractiveness, elegance, softness, smoothness, durability, excellent chemical stability, flame resistance, insulation, acid resistance, alkali resistance, water and moisture proofing property, corrosion prevention, stretching resistance, aging resistance, electrostatic prevention, excellent comprehensive performance and the like.

The invention discloses a method for producing a fireproof flame-retarding medium-density fiber plate special for an office table. The method comprises the steps of (1) raw material treatment, (2) screening, (3) steaming and softening, (4) grinding, (5) sizing and drying, (6) pre-pressing, (7) hot pressing, (8) sawing and sanding, (9) facing hot pressing and (10) edge cutting. According to the method, eucalyptus bark, branches and scraps left after plate manufacturing are adopted as main raw materials, other miscellaneous trees are added, waste is turned into wealth, and full and effective utilization of timber resources can be achieved. Modified paraffin and an inflaming retarding urea-formaldehyde resin adhesive are added, so that the fireproof flame retarding performance is greatly improved; and the manufactured medium-density fiber plate special for the office table is good in fireproof and flame retarding performance, good in water resistance, low in formaldehyde content, safe andenvironment-friendly.

The invention discloses a high-performance ardealite fiber composite material and a preparation method thereof. According to the preparation method, a close packing design method is utilized to optimize the matrix mix proportion of the ardealite composite material, and then organic fibers are doped into the optimized matrix, so that the high-performance ardealite fiber composite material is prepared. The matrix of the composite material is composed of the following components in parts by weight: 100 parts of semi-hydrated phosphogypsum, 5 to 50 parts of slag powder, 5 to 40 parts of fly ash, 5 to 20 parts of cement, 0.05 to 0.5 part of a special retarder for gypsum, 0.1 to 0.5 part of a polycarboxylic acid water reducer and 40 to 120 parts of water. The mixing amount of the organic fibers of the composite material is 0.001 to 0.0006 (by volume fraction). The high-performance ardealite fiber composite material disclosed by the invention has the characteristics of good construction performance, high strength, water resistance, moisture resistance and low density, and has a wide application range.

The invention discloses a concrete filled steel tube column-H-shaped steel beam-steel support-pi-shaped connecting piece combined corner column bottom joint and a manufacturing method. The joint is mainly composed of a light square steel tube recycled concrete column, an H-shaped steel beam, pi-shaped connecting pieces, web connecting plates, high-strength bolts, steel supports, cross-shaped benchtie bars and prefabricated recycled concrete local floor slabs. Compared with the prior art, the beam-column-support connecting joint is simple in structure, convenient to construct and low in cost.Meanwhile, the joint is clear in force transmission path and has two earthquake-proof defense lines. The beam-column joint and the steel supports are creatively assembled through the pi-shaped connecting pieces, the assembly type floor slabs are integrally tied to adjacent joint areas of the corner columns and local floor slabs through the cross-shaped bench tie bars at the positions of the cornercolumns, and the bending resistance, the pressure resistance and the stability of the assembly type floor slabs are enhanced. The joint is high in integrity and excellent in anti-seismic property, and key technical support is provided for engineering design of the light steel composite structure of the fabricated green house.

The invention relates to a modular structure profile, in particular to a wood-plastic-perlite composite wall panel. The wood-plastic-perlite composite wall panel comprises a composite wall panel framework, wherein reinforcing ribs are arranged in the framework, a perlite layer is arranged in profile grids between the framework and the reinforcing ribs, a cuboid boss is arranged at one end of the composite wall panel framework, ribs are designed on the boss, a cuboid groove is arranged at the other end of the composite wall panel framework, a strip-shaped groove is arranged on the groove edge of the cuboid groove, and wall panel joints are mounted at two ends of the composite wall panel framework. The modular design is adopted, the convex-concave matching process is adopted for realizing plug-in connection, tight sealing performance and good heat insulation and sound insulation effects are achieved. The wood-plastic-perlite composite wall panel is convenient and fast for construction. The wood-plastic-perlite composite wall panel can be widely used for interior walls of frame-structure buildings.

The invention relates to a mortar concrete waterproof agent, which has the advantages of strong water and moisture resistance. The invention discloses a high-efficiency crack-resistant multifunctionalconcrete and mortar waterproof additive, which is prepared from 4-5 parts of polyvinyl alcohol, 3-4 parts of stearic acid, 3-4 parts of aqueous ammonia, 2-3 parts of tri-tincture ester and 90-110 parts of water. The mortar concrete waterproof agent has superior effect of water and moisture resistance, anti-seepage, and leaking stoppage.

The invention relates to the technical field of composite sheets, and in particular relates to a polyvinyl chloride-microfiber composite sheet and a laminating process thereof. The composite sheet comprises a PVC base material layer and microbfibers compounded on the surface of the PVC base material layer, wherein the PVC base material layer is prepared from the following raw materials in parts byweight: 80-120 parts of PVC resin, 55-65 parts of a filling agent, 20-30 parts of dioctyl phthalate, 2-3 parts of a heat stabilizer, 0.01-0.16 part of a toner material, 0.01-0.15 part of titanium dioxide and 0.15-0.7 part of other auxiliaries. The polyvinyl chloride-microfiber composite sheet provided by the invention has better toughness and air permeability, has extremely excellent wear-resisting property and excellent cold resistance, air permeability and ageing resistance and also has the advantages of good chemical stability, flame retardance and insulation, acid and alkali resistance, water and moisture resistance, corrosion prevention, tensile resistance and anti-static property, so that comprehensive performance is excellent.

The invention provides a door plate and a manufacturing process thereof, and relates to the technical field of door plates. The manufacturing process of the door plate comprises the following steps that a steel plate is welded and formed, the cross section of the steel plate is in a U shape, the U-shaped interior of the steel plate is filled with filler, and then wood plates are installed on the periphery of the steel plate. According to the manufacturing process, the door plate has the hardness of the steel plate and the wood grain texture of the wood plates, so that the door plate has the advantages of high hardness and attractive appearance. The invention further provides the door plate. The door plate has the advantages of good wood grain imitation effect, firmness, long service life, water resistance, moisture resistance and difficulty in deformation.

A wood protectant is prepared from the following raw materials in part by weight: 3-8 parts of hydroxyquinolinone, 6-10 parts of nonyl phenol, 5-11 parts of tributyltin palmitate, 8-13 parts of waterborne acrylic emulsion, 5-8 parts of zirconium stearate, 7-9 parts of dipropylene glycol mono butyl ether, 2-6 parts of a sterilizing agent, 3-5 parts of a thickening agent, 3-8 parts of phosphoric acid, 6-9 parts of butanetetracarboxylic acid, 5-10 parts of dioctyl dimethyl ammonium chloride, 4-7 parts of zinc borate, 2-5 parts of glycerol monostearate, 3-9 parts of disodium octaborate, 2-8 parts of ferric chloride, 3-7 parts of boric acid. The wood protectant has the benefits that the wood protectant has good waterproof and dampproof properties, is long-lasting in action time, and can achieve excellent sterilization and bacteriostasis effects.

The invention discloses a concrete filled steel tubular column, H-shaped steel beam, steel support and pi type connecting piece combined center column bottom joint and a making method. The joint mainly comprises a light square steel tube recycled concrete column, H-shaped steel beams, a pi type connecting piece, web connecting plates, high-strength bolts, steel supports, I-shaped bench binding steel bars, slab column binding steel bars and a prefabricated recycled concrete floor. Compared with the prior art, the joint is simple in structure and convenient to construct, and has a clear force transferring route and two seismic fortification lines. The novel structures such as the pi type connecting piece, the bench binding steel bars and the slab column binding steel bars are creatively proposed, and integrality of slab-column-joint domain is enhanced; bending resistance, pressure resistance and stability of the joint are effectively improved; reliability of the steel support and the pitype joint connecting structure is further ensured; and the joint is firm in beam-column-support-floor connection, high in integrality and excellent in seismic performance and the key technological support is provided for engineering design of a prefabricated green housing light steel combined structure.

The invention relates to a warm quilt for a greenhouse. The warm quilt for the greenhouse is characterized by comprising an outer waterproof layer, an insulation layer, a heat preserving layer and a heat transfer layer which are sequentially arranged from outside to inside, wherein the outer waterproof layer is formed by a waterproof cloth; the insulation layer is formed by a PE cloth; the heat preserving layer is manufactured from heat preserving cotton; the heat transfer layer is a carbon fiber blanket. The warm quilt for the greenhouse is simple in structure, easy to be achieved, resistant to moisture, and good in heat preserving effect.

The invention discloses a concrete filled steel tube column-H-shaped steel beam-steel support-pi-shaped connecting piece combined type side column bottom joint and a manufacturing method. The joint ismainly composed of a square steel tube recycled concrete column, an H-shaped steel beam, pi-shaped connecting pieces, web connecting plates, high-strength bolts, steel supports, stool steel bars anda prefabricated recycled concrete local floor slab. Compared with the prior art, the beam-column-support connecting joint is simple in structure, convenient to construct and clear in force transmission path, and has two seismic defense lines. The beam-column joint and the steel support are creatively assembled through the pi-shaped connecting pieces, the assembled floor slab is partially connectedwith the joint into a whole through the stool steel bars, the bending resistance, the pressure resistance and the stability of the joint are enhanced, and the reliability of connection between the steel support and the pi-shaped connecting pieces is guaranteed. The beam-column-support-floor slab of the joint is firm in connection, high in integrity and excellent in anti-seismic property, and keytechnical support is provided for engineering design of a light steel composite structure of an assembly type green house.

The invention discloses a PP (Propene Polymer) honeycomb board material for an automobile spare tyre cover plate. The PP honeycomb board material for the automobile spare tyre cover plate comprises asurface layer, a bottom layer, a polypropylene honeycomb core layer arranged between the surface layer and the bottom layer, and a hot melt adhesive membrane layer for bonding the surface layer, the polypropylene honeycomb core layer and the bottom layer into a whole. The hot melt adhesive membrane layer is prepared from the raw materials: ethylene-vinyl acetate copolymer, 1,2-benzothiazoline-3-ketone, a butyl rubber, polymaleic anhydride, 2,6-butylated hydroxytoluene, a filler and the like; The hot melt adhesive membrane with a good bonding property, high bonding strength, high stripping strength, high heat resistance and cohesion strength, high stability, fast drying speed, less consumption, high heat stability, and excellent heat resistance and high-and-low temperature resistance is combined with a structure of a honeycomb board, so that the bonding strength of the honeycomb board is improved, a mechanical performance of the PP honeycomb board is further improved, the service life of the PP honeycomb board is prolonged, the emission of VOC (Volatile Organic Compounds) in an automobile is effectively reduced, and meanwhile, the PP honeycomb board material for the automobile sparetyre cover plate has better weight reduction and sound insulation effects, is waterproof and wetproof, and has a better corrosion resistance effect.

A prefabrication assembly type underground granary comprises a granary bottom, multiple prefabricated granary wall plates, a granary top, multifunctional pillars and multiple layers of enhancing pillars, wherein each granary wall plate is of an integral structure formed by combining a plastic plate on the outer side and a concrete slab on the inner side, each granary wall plate is provided with connection devices on the periphery, and the granary wall plates can be connected with adjacent granary wallboards, the multifunctional pillars and the multiple layers of enhancing pillars by means of the connection devices; the multifunctional pillars and the enhancing pillars are wrapped by plastic plates, can be used for positioning the granary wall plates, and are main stress components for bearing soil pressure and grain pressure and resisting buoyance, and the depth of each multifunctional pillar and each enhancing pillar anchored into soil is greater than the depth of the granary bottom; the underground granary is characterized in that each multifunctional pillar is divided into a plurality of sections from top to bottom, the inner side of each first section on an uppermost layer is provided with a first-layer granary wall plate, the corresponding enhancing pillars are firstly arranged on the inner side of the corresponding second section, the inner side faces of the enhancing pillars are enabled to be flush with the inner side face of the first-layer granary wall plate, then a second-layer granary wall plate is arranged on the inner side face of the corresponding enhancing pillar, and the first-layer granary wall plate and the second-layer granary wall plate are partially overlapped; by using an arrangement mode similar to that above, the second-layer granary wall plate and a third-layer granary wall plate are partially overlapped, and overlapping is performed until a bottommost-layer granary wall plate is overlapped, thus forming the ladder-like assembly type underground granary.

The invention relates to a steel-plate-externally-covered assembled underground barn with prefabricated caulking strips. The flat shape of the underground barn is a round shape. The underground barn comprises multifunctional columns (1), a plurality of prefabricated barn wall plates (2), a barn roof (3), a barn bottom (4) and a plurality of prefabricated caulking strips (5), wherein the barn wall plates (2) are prefabricated steel plate-concrete arc-shaped plates in the flat plane; the peripheries of the barn wall plates (2) are connected with the multifunctional columns (1) and the prefabricated caulking strips (5) to from an integral round tube structure; the multifunctional columns (1) position the barn wall plates; the soil anchoring depth of the multifunctional columns (1) is greater than the depth of the barn bottom (4); and the multifunctional columns (1) are major stress components for bearing soil pressure and grain pressure and resisting the buoyancy force. The steel-plate-externally-covered assembled underground barn is characterized in that the multifunctional columns (1) are separated into a plurality of sections from top to bottom; a first layer of barn wall plate is arranged at the inner side of the first section at the uppermost layer; a second layer of barn wall plate is arranged at the inner side of the second section; the similar setting mode is used until the lowermost layer of barn wall plate is reached; and a round assembled underground barn structure is formed. The barn wall plates (2) are prefabricated composition plates formed by inner and outer side steel plates (9), anchor nails (10) and inner side concrete (11), and steel plates are covered on the periphery for opening sealing.