48results about How to "Give full play to the material performance" patented technology

The invention discloses a novel hybrid beam structural system. The novel hybrid beam structural system comprises a corrugated web steel box connecting beam segment and prestressed concrete box beam segments. The prestressed concrete box beam segments are located on the two sides of the corrugated web steel box connecting beam segment. The novel hybrid beam structural system is mainly used for a continuous beam bridge or a rigid frame bridge. The midspan part of a main span is the corrugated web steel box connecting beam, the rest part of the main span and sidespans are prestressed concrete box beams, and steel-concrete composite segments are used for connection transition between the prestressed concrete box beams and the corrugated web steel box connecting beam. The novel hybrid beam structural system overcomes the defects of a traditional prestressed concrete box beam unitary system and defects of a traditional steel box beam unitary system, and has the beneficial effects of being good in stress performance and economical efficiency, high in span capacity and the like. According to the structural system, the dead load is effectively reduced, the span capacity is improved, the midspan deflection can be reduced, and the defects that the continuous downwarping and crazing of the midspan of the prestressed concrete box beam, poor stability of an ordinary steel box beam web and poor durability of bridge deck pavement are avoided.

The invention discloses a sleeve reinforced concrete column. The sleeve reinforced concrete column is characterized in that: a sleeve (1) of a reinforced concrete column (2) is a prefabricated active powder concrete sleeve. The sleeve reinforced concrete column has the advantages of convenience for construction, low cost, high axial bearing capacity, good shock resistance, predominant fireproof performance, excellent durability and the like, meanwhile, saves more resources and energy, and accords with the requirements of sustainable development.

The invention discloses a module prestress fabricated retaining wall and an assembly method thereof. The module prestress fabricated retaining wall comprises retaining wall basic units, each retaining wall basic unit is composed of a basic module, rib column modules and an arc-shaped plate, wherein the two rib column modules and the basic module are vertical and are connected through reinforcingsteel bar grouting, and the arc-shaped plate is inserted between the two rib column modules; and the multiple retaining wall basic units are connected through the reinforcing steel bar grouting to form the module type prestress fabricated retaining wall. Modularization, prefabrication and assembling of the retaining wall are achieved, the retaining wall basic units are prefabricated and molded outside a construction site, the structure quality of the retaining wall is guaranteed, the construction efficiency is improved, and the labor amount of a construction worker is reduced. Meanwhile, mountain cutting and quarrying are avoided during construction, influences on the environment are reduced, and construction is not limited by the environment.

The invention discloses a suspension type flying airport with a stringed inflatable film staggering structure. The suspension type flying airport comprises a structure part, a suspension part, a transporting part, a gas and power supplying part and a safety part, wherein the structure part comprises upper stringed trusses, vertical supporting rods, a lower string, horizontal supporting rods, pavement slabs and stable ropes; the suspension part comprises upper-part spherical air bags, air-bag pulling ropes and lower-part air bags; the transporting part comprises boarding gallery bridges, an air passenger transferring stations, ropeway pulling ropes, passenger transferring boxes and ground passenger transferring stations; the gas and power supplying part comprises a power generator, an inflator, an inflating pipeline and an electric wire; and the safety part is a wireless visual interphone. The suspension type flying airport provided by the invention has the advantages that the structure part is a stringed wood structure, the suspension part is an inflating film structure, is lifted by utilizing air buoyancy after being assembled on the ground, and can provide a lifting platform and passenger getting on or off services for small business passenger planes, so that the taking-off and landing waiting time of the passenger planes is reduced, and the low-altitude space in cities is fully utilized.

The invention discloses a buttress-type steel structure dam. The buttress-type steel structure dam comprises a water retaining plate, a foundation and a support truss, wherein an anchoring piece is arranged in the foundation; the anchoring piece is fixedly connected with the bottom part of the truss on the upper part; the truss comprises a certain number of master rods which are approximately vertical to the water retaining plate, vice rods which are vertical to the master rods, and inclined rods which are connected diagonally, wherein the master rods are long rods; the vice rods are short rods; the two ends of each vice rod is connected with each of the master rods; the distance between adjacent master rods is L; the distance L becomes larger gradually from the lower part to the upper part of the water retaining plate; the two ends of the truss are provided with side piers; and the shape of the side piers are matched with the shape of the cross section of the steel structure dam. The supporting capacity of the truss of the buttress-type steel structure dam is high; the truss structural design is reasonable; the two ends of the truss of the steel structure dam of the invention are provided with the side piers; and other water conservancy facilities such as an escape gate, a ship passing gate or the like can be arranged on the side piers, so that the steel structure dam also has other functions besides the functions of retaining and storing water.

The invention discloses a perforating grout anchoring prefabricated assembly-type concrete-filled steel tubular frame structure, which comprises a square steel tube concrete lower column, a square steel tube concrete upper column, a semi-open steel box concrete composite beam, a prefabricated slab corner unit, a prefabricated slab edge unit, a prefabricated slab middle unit, column-beam post-pouring joints, column-column bolted connection joints, a prefabricated concrete slab and post-pouring concrete. The square steel tube concrete lower column, the square steel tube concrete upper column, the semi-open steel box concrete composite beam and the prefabricated concrete slab are connected into a whole in a grout anchoring mode, the pouring amount is less, the assembling rate is high, all components are in a prefabricated assembly form, onsite splicing is conducted, the construction speed is high, the construction process is simplified, and the construction environment is optimized; and secondly, the requirements of grout anchoring for the construction precision are low, operation by workers is convenient, the beam-column components are in a combined structural form, the self-weight is low, force bearing is more reasonable, the material property can be exerted sufficiently, the bearing capacity is high, the fire-resisting property is good, and shock resistance is good.

The invention discloses a cantilever construction detachable triangle hanging basket load-bearing primary truss which comprises a girder, an adjustable base, a stand column, a plate-type connecting chapiter and diagonal members. The adjustable base is formed by connecting upper and lower parts through a first hinge pin; the lower part of the adjustable base is connected with the middle part of the girder by intermittent welding; the upper part of the adjustable base is fixedly connected with the lower end of the upright; the upper end of the stand column is connected with the plate-type connecting chapiter by a bolt; both sides of the plate-type connecting chapiter are respectively connected with the diagonal members by second hinge pins; the diagonal members at both sides are symmetrically arranged; the lower ends of the diagonal members are connected to one end of the girder by third hinge pins. The cantilever construction detachable triangle hanging basket load-bearing primary truss disclosed by the invention is formed by utilizing the characteristics of shape steels to carry out machining manufacturing and assembling; not only can the dead weight of a hanging basket be reduced, but also a balance weight is not required; meanwhile, the cantilever construction detachable triangle hanging basket load-bearing primary truss is provided with a small number of components and is convenient to install and transport; the use effect of the hanging basket is ensured; meanwhile, the utilization rate of the components is greatly improved and cost of manufacturing, transportation and the like of equipment is also reduced.

The invention discloses a self-balancing bridge with combined arch bridge and suspension bridge. The self-balancing bridge comprises a main girder structure, a bridge floor, two arch rings and two main ropes, wherein the main girder structure is connected with the arch rings through slings, the main ropes are connected with the main girder structure through jackstays, the upper ends of the jackstays are articulated with the main girder structure, and the lower ends of the jackstays are articulated with the main ropes. The combined self-balancing bridge combines stress characteristics of an arch and the ropes, and horizontal forces of the arch, the ropes and the girder are in a self-balancing state without needing external horizontal limitation and without generating a pushing force or a pull force to the outside. The invention further discloses a construction method. The construction method comprises bridge abutment or bridge pier construction, support construction, main girder structure construction, arch ring construction, sling construction, bridge floor construction, sling tensioning, main roper construction, jackstay construction, sling force releasing and the like. The construction method effectively improves the bridge formation efficiency, reduces the construction difficulty and saves time limit for a project.

The invention discloses a cable-girder combined type bridge and a construction method thereof. The cable-girder combined type bridge comprises a plurality of bridge sections, each bridge section comprises a girder body structure, a pavement layer and a cable structure, the girder body structure comprises a plurality of columns of longitudinal beams, and the cable structure comprises a cable and stay bars. The construction method is characterized in that the bridge is constructed in bridge sections from front to the back along the longitudinal direction of the bridge, construction methods on the bridge sections are the same, and the construction process of each bridge section includes the steps of 1), construction of the first bridge section includes: 101, construction of the girder body structure, 102, mounting of the cable structure, and 103, pavement of the bridge floor; 2), construction of the next bridge section; 3), multiple repeat of the step 2) till all the construction process of the constructed bridge is completed. All the girder structure is under pressure, the cable is under tension, the cross section and self weight of the girder body structure are reduced, bending moment of the girder body structure is reduced, and spanning capability is increased.

The invention discloses a method for reinforcing a midspan of an ordinary three-span steel continuous beam bridge. The method comprises the following steps: building a construction operation platform; treating the surface of a midspan bottom plate; jacking up two side spans by virtue of a jack and then dismantling a side span support seat; lowering the jack to be lower than the side span support seat; calculating to obtain the lowered value of the jack relative to the side span support seat; unloading dead load bending moment of the midspan, and then pasting and fixing with a steel plate; jacking up the edge spans by virtue of the jack, and reinstalling the dismantled side span support seat at the original position; and lowering the jack, relocating the edge spans on the side span support seat, and then shifting out the jack. According to the method, by unloading the dead load bending moment of the midspan and then pasting and fixing with the steel plate, the steel plate can participate into the activities of bearing the load of a car and then adding dead load, can also participate into the activity of bearing the dismantled dead load bending moment; the bending bearing capacity of the main girder can be effectively improved; meanwhile, the material properties of reinforcing steel plate can be put into a relatively full play; and the bridge safety is not affected by lowering the jack in the construction process.

The invention discloses a high-temperature-resistant plastic woven bag and a preparation method thereof. According to the invention, polypropylene is used as a base material, the varieties and formula of master batch raw materials are optimized, production technology is improved, and scientific compounding is carried out; the plastic woven bag employs Cerasus humilis fiber capable of substantially improving the shock resistance of the plastic woven bag and reducing production cost and easy to biodegrade, modified carbon nano-tubes capable of substantially improving the high-temperature resistance, relative tensile load, strength, toughness and elastic modulus of the plastic woven bag, a polyethylene / winter rye peptide compound capable of greatly improving the low-temperature resistance of the plastic woven bag, and bitter apricot kernel oil capable of effectively enhancing the lubricity and inoxidizability of the plastic woven bag; and the above-mentioned materials and other processing aids cooperate with each other, so the environment-friendly high-temperature-resistant plastic woven bag with good physical properties is prepared. The plastic woven bag provided by the invention has a filling temperature as high as 200 DEG C; filling of materials with temperatures of 160 DEG C, 170 DEG C, 180 DEG C, 190 DEG C and 200 DEG C does small harm to appearance of the plastic woven bag; and after natural storage of the plastic woven bag at room temperature for 24 h, the retention rate of the breaking strength of the plastic woven bag is still 76 to 96% and the retention rate of breaking elongation is 75 to 95%.

The invention discloses an easily-degradable anti-shrinkage polypropylene master batch, wherein polypropylene serves as a base material, the types and the formula of the master batch are optimized, and a production process is improved. A complex antioxidant which contains a biologic antioxidant, modified nanocarbon which can obviously improve high temperature resistance, shrinkage resistance, relative tensile load, strength and toughness and elasticity modulus of the polypropylene master batch, calcium fruit fibers which can obviously improve shock resistance of the polypropylene master batch, are easily biodegradable and lower production cost, polyethylene / winter rye peptide complexes which can greatly improve low temperature resistance of the polypropylene master batch and bitter almond oil which can effectively improve lubricating property and oxidation resistance of the polypropylene master batch are scientifically compounded; the obtained compound has a synergistic effect with other processing aids; finally, the environment-friendly easily-degradable anti-shrinkage polypropylene master batch with good physical property is obtained.

The invention discloses a function gradient concrete composite well wall and manufacturing method and belongs to the technical field of vertical well construction. The function gradient concrete composite well wall is manufactured by adopting a prefabricating or cast-in-place manner. The function gradient concrete composite well wall comprises multiple layers of concrete well walls, wherein the concrete well walls are combined coaxially and closely, and elastic moduli of the concrete well walls are different. Damping material layers are arranged among the layers. All the well walls are arranged with different thicknesses. The concrete material performance is utilized fully, and the function gradient concrete composite well wall with the low requirement for concrete strength, small wall thickness and low project manufacture cost is manufactured. The elastic limit bearing capacity of a thick-wall cylinder is improved remarkably, and high-strength concrete does not need to be used. The well wall thickness is reduced, the material use amount is reduced, and the project manufacturing cost is reduced substantially.

The invention discloses a special-shaped precast pile zipper type supporting structure and a construction method thereof. A special-shaped precast pile comprises a special-shaped pile end plate and aspecial-shaped pile body, the special-shaped precast pile body is made of a concrete material and applies prestress, a reinforcement cage is arranged in the pile body, a pile web is in a hollow circular shape, and the special-shaped precast pile is in an irregular short T shape. The construction method comprises the steps that the special-shaped precast piles are symmetrically constructed in a staggered mode on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure; after buckling construction of the special-shaped precast piles is finished, small-diameter high-pressure jet grouting mixing pile construction is carried out at the joint of the two parallel special-shaped precast piles, and a high-pressure jet grouting mixing water stop body is formed to block a gap formed by the parallel special-shaped precast piles; and concrete crown beams are arranged at the tops of the special-shaped precast piles. The supporting structure is particularly suitable for a construction environment with a narrow site, the use amount of concrete and water-stop mixing pile cement is saved, meanwhile, the integrity and the lateral deformation resistance of the foundation pit supporting structure can be enhanced, and economic and environmental benefits are remarkable.

The invention discloses a prefabricated steel tube bundle partially-prestressed concrete beam and a construction method thereof. The beam comprises a hollow lattice type steel tube bundle, concrete, prestressed steel bars, baffles and anchoring steel bars, wherein the baffles are fixed to the two ends of the interior of the hollow lattice type steel tube bundle; a plurality of prestressed bar holes are formed in the lowermost layer of the baffle of a lowermost steel member, and a plurality of preformed holes are formed in other layers; the other baffles are provided with a plurality of layers,wherein a plurality of preformed holes are formed in each layer; the prestressed steel bars are arranged in the prestressed bar holes in a sliding manner and penetrate through the whole beam; the prestressed steel bars are loaded with control stress and anchored; the anchoring steel bars are inserted into the preformed holes and fixed; and concrete is poured between the baffles, and after strength requirements are met, prestress is released, and therefore the steel tube bundle partially-prestressed concrete beam is formed. The beam combines advantages of a steel reinforced concrete structureand a prestressed concrete structure, so that the anti-vibration property and the anti-deformation capacity of the beam are improved, the bearing capacity is high, the later-period bearing capacity isstable, and the structural rigidity is greatly improved.

The invention discloses an anti-electrostatic plastic woven bag. The environment-friendly anti-electrostatic plastic woven bag with good physical properties is finally prepared through taking polypropylene as base stock, optimizing the raw material species and formula of master batch, improving a production process, scientifically compounding modified carbon nano-tubes, Prunus humilis fibers, a polyethylene / winter rye peptide complex and bitter almond oil, and enabling the compound to be in synergism with other processing aids, wherein the modified carbon nano-tubes can be used for remarkably improving the anti-electrostatic property, relative tensile load, strength, toughness and elastic modulus of the plastic woven bag, the Prunus humilis fibers can be used for remarkably improving the impact resistance of the plastic woven bag, are easily biodegradable and are reduced in production cost, the polyethylene / winter rye peptide complex can be used for greatly improving the low-temperature resistance of the plastic woven bag, and the bitter almond oil can be used for effectively improving the lubricating property and oxidation resistance of the plastic woven bag. Shown by tests, the arithmetic mean value of surface resistance of the upper and lower faces of the anti-electrostatic plastic woven bag disclosed by the invention is 0.3*10<6> omega to 0.5*10<6> omega, and the anti-electrostatic effect is 3 times that of plastic woven bags in the prior art. Simultaneously, the anti-electrostatic plastic woven bag has good physical properties, falling performance and ultraviolet resistance.

The invention provides a beam-column joint for multiple high-rise wood / bamboo frame structures. The joint has the advantages that the rigidity is high, the force transmission path is reasonable, the strength of wood (bamboo) materials is fully utilized to improve the stress performance of a wood (bamboo) frame column / beam, the brittle failure of a beam-column member is avoided, the ductility of astructure is increased, a structural member and the joint fully exert material properties, and the seismic resistance is also better. The beam-column joint for the multiple high-rise wood / bamboo framestructures is characterized by comprising a box-shaped steel column, wherein upper and lower wood / bamboo frame columns are connected with the steel column through pins and bolts which are fixedly connected to the upper and lower portions of the steel column, and are solidified, and wood / bamboo frame beams are connected with the steel column through U-shaped groove steel fixedly connected to the two sides of the steel column and steel hoops playing a fastening role.

The invention provides a steel-recycled concrete composite beam component with a composite structure. The steel-recycled concrete composite beam component is mainly applied to residential buildings, public places and other civil buildings; a tensile steel plate of the component is positioned on the upper surface of concrete in a hogging moment area; the lower surface of the steel plate is a rough surface, and pouring holes are formed to ensure that the concrete is poured compactly; stud connecting pieces and channel steel connecting pieces are welded on the upper surface of a steel beam and reliably welded with the bottoms of profiled steel plates; the upper parts of tie bolts are bolted with the tensile steel plate, and the lower parts are bolted with the convex parts of the corresponding profiled steel plates; and the recycled concrete is densely filled between the profiled steel plates and the tensile steel plate, and is concrete which is completely or partially made of recycled coarse aggregate, recycled fine aggregate, recycled micro powder or doped with other waste materials. By arranging the composite structure in the composite beam, the bending resistance of the hogging moment area can be greatly improved, the problem that the width of a hogging moment crack of recycled concrete is too large is solved, the connection degree of all parts is remarkably increased, and the material performance of the concrete is fully played.

The invention discloses a method for producing a plastic tray by utilizing a hollow blow molding machine. The method comprises the steps of sealing an original air outlet of a blowing hole in the bottom of a traditional front die of the plastic tray, and arranging five blowing needles on the forming surface of the front die by utilizing a ventilation channel of the original bottom blowing hole; clamping the bottom of a tubular hollow blank when the blank is discharged, beginning to assemble, preblowing air to the hollow position of the tubular hollow blank through a blowing port in an extruding machine at the same time, stopping preblowing air when the tubular hollow blank is expanded to the set size, and continuing assembling; at the time, the five blowing needles are slowly close to the hollow blank, firstly, the hollow blank is punctured by the longest central blowing needle so as to blow air, and secondly, the hollow blank is punctured by the corner blowing needles with the same length at four corners so as to blow air, so that simultaneous blowing from five side surfaces is realized, and the tray blank is uniformly and closely adhered to the surface of a die cavity instantly. Finally, the method for producing the plastic tray, which has the advantages of uniformity in wall thickness, high intensity, low raw material consumption, low cost, stable quality and high efficiency, is provided.

The invention discloses a tension-resistant plastic woven bag. The tension-resistant plastic woven bag is characterized in that polypropylene is used as the base material, master batch raw material varieties and formula are optimized, a production process is improved, and modified carbon nanotubes, Prunus Humilis Bunge fibers, polyethylene / winter rye peptide compounds and bitter almond oil are scientifically compounded to produce the tension-resistant plastic woven bag; the modified carbon nanotubes can evidently increase the tension resistance, relative tension load, strength, toughness and elasticity modulus of the plastic woven bag; the Prunus Humilis Bunge fibers can evidently increase the impact resistance of the plastic woven bag and are easy to biologically degrade and capable of lowering production cost; the polyethylene / winter rye peptide compounds can greatly increase the low temperature resistance of the plastic woven bag; the bitter almond oil can effectively increase the lubricating performance and oxidation resistance of the plastic woven bag. The produced tension-resistant plastic woven bag has the advantages that the tension-resistant plastic woven bag is excellent in physical property, to be more specific, the plastic woven bag is high in tension resistance load, the multi-directional tension load of the plastic woven bag is 520-930(N / 50mm), and the release force of the plastic woven bag is 6.5(N / 30mm); the plastic woven bag is high in impact resistance, to be more specific, bag breaking in optional directions is avoided when the plastic woven bag falls from a position 2m in height; the plastic woven bag is high in ultraviolet resistance, to be more specific, the multi-directional tension load retention rate of the plastic woven bag is 78-85% after the plastic woven bag is subjected to ultraviolet irradiation alternate experiments for 144 hours.

The invention discloses a shrinkage resistant plastic woven bag. Polypropylene is adopted as a base stock, variety and formula of a master batch raw material are optimized, a production technology is improved, modified nanocarbon which can remarkably improve shrinkage resistant performance, relative tension load, intensity, tenacity and elasticity modulus of the plastic woven bag, calcium fruit fiber which can remarkably improve shock resistance of the plastic woven bag, be easily degraded biologically and reduce the production cost, polyethylene / winter rye peptide compound which can greatly improve low temperature resistance of the plastic woven bag, and bitter almond oil which can effectively improve lubricity and inoxidizability of the plastic woven bag are scientifically compounded, and finally the shrinkage resistant plastic woven bag is prepared. The molding shrinkage of the preparing raw materials of the plastic woven bag is low and is lowered by 45-47% than that of a merchant modified polypropylene material with a low shrinking percentage, thus the plastic woven bag has good shrinkage performance; in addition, the prepared shrinkage resistant plastic woven bag is good in dimensional stability, does not shrink, is very applicable to environmental requirements in the storing and using processes, stable in size, and does not generate shrinkage behaviors.

The invention discloses a subdivided sheet combined spherical latticed housing. The lattice housing includes longitude flat sheets and latitude flat sheets; a spherical surface is divided into main grids in the longitude direction and the latitude direction; common arc sheet members are arranged in the longitude direction, and discontinuous arc sheet members are arranged in the latitude direction; the main grids are divided into subdivided grids according to a cross-shaped manner or a groined shaped manner; arc flat sheet members are arranged in one direction continuously and arranged in the other direction discontinuously; edges of the subdivided grids are connected to the main grids; and similarly, the subdivided grids are divided into multi-level subdivided grids according to the cross-shaped manner or the groined shaped manner. The components of subdivided sheet combined spherical latticed housing are arc flat sheet members which are easy to process and manufacture, the arc flat sheet members are combined to form a curved spherical housing; the spherical latticed housing is beautiful in appearance and is large in space utilization rate; subdivided main-sub grid structure is adopted, the structural layer is clear, the stability of the flat sheet members can be improved, and the structure integrity is excellent.

The invention discloses an antioxidative plastic woven bag. According to the invention, polypropylene is used as a base material, the varieties and formula of master batch raw materials are optimized, production technology is improved, and a composite anti-oxidant containing bitter apricot kernel oil (rich in vitamin E) is scientifically compounded; the antioxidative plastic woven bag employs modified nano-carbon capable of substantially improving the high-temperature resistance, contraction resistance, relative tensile load, strength, toughness and elastic modulus of the plastic woven bag; the antioxidative plastic woven bag also employs Cerasus humilis fiber capable of substantially improving the shock resistance of the plastic woven bag and reducing production cost and easy to biodegrade, a polyethylene / winter rye peptide compound capable of greatly improving the low-temperature resistance of the plastic woven bag, and the bitter apricot kernel oil capable of effectively enhancing the lubricity and inoxidizability of the plastic woven bag; and preparation raw materials for the antioxidative plastic woven bag have a long oxidation induction period, and the oxidation induction time is decreased by 58.33% compared with a commercially-available antioxidative modified polypropylene material. The prepared antioxidative plastic woven bag has substantial antioxidation performance and anti-aging performance, good weatherability, good environmental suitability and long service life.

The invention discloses a special antioxidant material for a plastic tray and a preparation method thereof and belongs to the technical field of manufacture of trays. By taking high density polyethylene as a main raw material, types and formula of the raw material are optimized, and the environmental-friendly special antioxidant material for the plastic tray which is good in service performance can be finally prepared by scientifically compounding calcium-fruit fibers, modified nanocarbon and a compound antioxidant which have a synergistic effect with other processing aids, wherein the calcium-fruit fibers can obviously improve the impact resistance of the special material for the plastic tray, is easily biodegradable and reduces the production cost; the modified nanocarbon can obviously improve the high-temperature-resisting, antistatic and anti-shrinkage properties of the special material for the plastic tray as well as relative tension load, strength, toughness and elastic modulus; and the compound antioxidant can effectively improve the oxidization resistance of the special material for the plastic tray. The special material is quite suitable for producing and processing the tray, thereby exploring a novel path for production and processing of the tray.

The invention discloses a supporting beam platform matched with a disc buckle type support and suitable for constructional engineering. The supporting beam platform comprises two sets of channel steel, a connecting plate and first high-strength bolts; the connecting plate is fixedly connected to the joint of every two adjacent sets of channel steel through the corresponding first high-strength bolts, and at least three sets of limiting holes are formed in each steel channel at equal intervals; the two sets of channel steel are arranged in a back-to-back structure, and a limiting steel pipe is arranged between the two sets of channel steel and located between the positions where the limiting holes are formed; the first high-strength bolts penetrate through the two sets of limiting holes and the limiting steel pipe; and one ends of the first high-strength bolts are in threaded connection with locking nuts. According to the disc buckle type support section steel and the supporting beam platform, the structure design is simple, operation is easy, the size of the section steel platform and the size of supporting beams can be determined according to stress calculation, and the support system is flexible to erect and high in applicability; the supports are all connected into a whole, the stability is good, and the bearing capacity is high; and the policy requirements of the industry and local use of the disc buckle type support are met, the economical efficiency of the support scheme is improved, and the material performance of the disc buckle type support is brought into full play.

The invention discloses a reinforcing system and method for a reinforced concrete column. A reinforcing groove is vertically formed in a side wall protective layer on the to-be-reinforced reinforced concrete column, and the interior of the reinforcing groove is coated with a filling material; the clean reinforcing groove is half filled with the filling material, then an aluminum alloy rib is placed into the clean reinforcing groove, and the reinforcing groove is pressed into the filling material; then the reinforcing groove is filled with a filling material and compacted and leveled, so that the reinforced concrete column and the aluminum alloy rib form a whole. A near-surface reinforcing method is adopted, so that the bonding area of the reinforcing rib and the concrete is increased, thepossibility of bonding stripping damage is reduced, and the bonding performance of the reinforcing rib and the concrete is improved. The characteristics of the aluminum alloy rib are utilized so thatthe energy consumption capability of the reinforcing column can be remarkably improved, the residual deformation generated after stress of the concrete column is reduced, and the damage self-repairingcapability of a component is improved.

The invention discloses a polypropylene composite material with strong dimensional stability and belongs to the technical field of polypropylene materials. Polypropylene is used as a basic material, raw material kinds and a formula of a composite material are optimized, and a production process is improved; a calcium fruit fiber, modified nano carbon, a polyethylene / winter rye peptide complex, bitter almond oil and a composite antioxidant are scientifically compounded and are synergized with other assistants, thus finally obtaining the polypropylene composite material with good physical properties and the strong dimensional stability, wherein by means of the calcium fruit fiber, the impact resistance of the polypropylene composite material can be remarkably improved, and the production cost is reduced; the calcium fruit fiber is easily biodegraded; according to the modified nano carbon, high temperature resistance, shrinkage resistance, relative tensile load, strength, toughness and elasticity modulus of the polypropylene composite material can be remarkably improved; according to the polyethylene / winter rye peptide complex, the low temperature resistance of the polypropylene composite material can be greatly improved; according to the bitter almond oil and the composite antioxidant, the lubricating property and the antioxidant property of the polypropylene composite material can be effectively improved.

The invention discloses a method for producing a plastic tray by utilizing a hollow blow molding machine. The method comprises the steps of sealing an original air outlet of a blowing hole in the bottom of a traditional front die of the plastic tray, and arranging five blowing needles on the forming surface of the front die by utilizing a ventilation channel of the original bottom blowing hole; clamping the bottom of a tubular hollow blank when the blank is discharged, beginning to assemble, preblowing air to the hollow position of the tubular hollow blank through a blowing port in an extruding machine at the same time, stopping preblowing air when the tubular hollow blank is expanded to the set size, and continuing assembling; at the time, the five blowing needles are slowly close to the hollow blank, firstly, the hollow blank is punctured by the longest central blowing needle so as to blow air, and secondly, the hollow blank is punctured by the corner blowing needles with the same length at four corners so as to blow air, so that simultaneous blowing from five side surfaces is realized, and the tray blank is uniformly and closely adhered to the surface of a die cavity instantly. Finally, the method for producing the plastic tray, which has the advantages of uniformity in wall thickness, high intensity, low raw material consumption, low cost, stable quality and high efficiency, is provided.