2059 results about "Hollow core" patented technology

The invention discloses a visual data-based automatic finite element modeling and performance evaluation method for an existing damaged hollow slab girder bridge. The method comprises the steps of S1, acquiring complete three-dimensional point cloud data of a multi-beam-slab model; s2, based on the three-dimensional point cloud data, extracting key geometric features of the structure by adopting a structure three-dimensional size automatic measurement method fusing plane projection and point cloud distortion correction; s3, for the damaged area of the multi-beam-slab structure, identifying the boundary of the damaged area and the non-damaged area of the multi-beam-slab structure through a point cloud neighborhood point height difference comparison and clustering analysis method, and carrying out detailed spatial position analysis on the damage; and S4, a damage unit set is automatically retrieved in combination with damage positioning quantitative information, and automatic updating of hinge joint damage of the multi-beam-slab structure is achieved through a life-death unit method failure damage area finite element grid. According to the method, automatic finite element modeling and evaluation of the existing hinge joint damage multi-beam-slab structure are achieved, and an efficient and accurate technical means is provided for health monitoring and performance evaluation of a bridge structure.

The invention discloses a cement-based aerogel heat preservation and heat insulation coating material for concrete and a spraying construction process of the cement-based aerogel heat preservation and heat insulation coating material, and belongs to the technical field of concrete materials. The coating material is prepared from powder, composite emulsion and water, and the powder is prepared by mixing superfine sand, cement, modified silicon dioxide-carbon nanotube composite aerogel powder, hollow glass beads, nanofibers, graphene nanosheets, an ultraviolet light absorber, a water reducing agent and a defoaming agent. The composite emulsion is composed of an acrylate copolymer emulsion, a polyvinyl acetate-ethylene emulsion, a temperature-sensitive polymer emulsion and a coalescing agent. Based on the multi-stage pore network and multi-component emulsion optimization design and multi-component synergistic effect, the material has good fluidity after being mixed, and has low heat conductivity coefficient, high strength and high toughness after being hardened; the construction technology of high-pressure water flushing and layered spraying is provided, and the method has the advantages of being efficient in construction, stable in quality and the like and can be applied to heat preservation and heat insulation of a concrete structure in a severe environment.

The invention discloses a hollow slab girder bridge maintenance decision-oriented hierarchical knowledge graph construction method, which comprises the following steps of: constructing a hollow slab girder bridge disease classification and maintenance decision general knowledge graph, combing disease types and evaluation indexes of a hollow slab girder bridge through cross-standard feature alignment and rule fusion, and defining each disease and the index thereof in a variable manner so as to construct a hollow slab girder bridge disease classification and maintenance decision-oriented hierarchical knowledge graph. The weight of each disease index is determined based on a fuzzy-Bayesian hybrid reasoning algorithm, and a complete general knowledge graph structure is formed; extracting disease information based on a detection report of a single bridge, endowing each disease with a maintenance suggestion by using a general knowledge graph, and forming a maintenance decision knowledge graph special for the bridge; and dynamically updating the special knowledge graph, and adjusting disease information and maintenance suggestions according to a subsequent detection report of the bridge to ensure timeliness and accuracy of the graph. According to the method, the problems that knowledge is dispersed and systematization is difficult in traditional hollow slab girder bridge maintenance decision making are solved, and scientificity and efficiency of bridge maintenance management are improved.

The invention provides a composite protection structure suitable for underwater seepage prevention and explosion prevention of a concrete gravity dam and a preparation and construction method, and belongs to the technical field of engineering explosion prevention and seepage prevention. The composite protection structure comprises a reinforced concrete slab anchored on the outer surface of the gravity dam by a certain distance through an anchor rod; a reserved interlayer between the reinforced concrete slab and the outer surface of the gravity dam is filled to form an anti-seepage and anti-explosion composite layer; the anti-seepage and anti-explosion composite layer is formed by pouring hollow glass bead-asphalt concrete, and the hollow glass bead-asphalt concrete is prepared from asphalt concrete with modified hollow glass beads as filler; the modified hollow glass beads account for more than 15% of the asphalt concrete by volume, and the asphalt concrete has enough sealing gas for reflecting explosive shock waves and has the characteristics of seepage prevention and energy dissipation. The composite protection structure has anti-seepage and anti-explosion functions, the service life of the dam is prolonged, and the ability of the dam to resist sudden extreme working conditions is improved.

The invention provides a hollow slab bridge disease time sequence prediction method and system based on machine learning, and is applied to the technical field of bridge disease analysis and prediction.The method comprises the steps that hollow slab bridge detection data is acquired, and an original data set is constructed according to the disease data; performing structured preprocessing on the original data; feature engineering is carried out on the structured data, random forest screening is utilized, feature correlation analysis is carried out, and a low-redundancy high-correlation feature set is obtained; dividing the bridge detection data corresponding to the low-redundancy high-correlation features into training samples according to a time sliding window, and constructing a time sequence sample set; and carrying out model training and optimization, training a time sequence sample, and predicting continuous values of future diseases. According to the method, the accuracy, precision and stability of bridge disease prediction are improved through data acquisition, preprocessing, feature optimization, model establishment and output of the dynamic change prediction result of the disease continuous index, the efficiency is higher, and the method has a good application prospect.

The invention belongs to the technical field of vibrating devices, and particularly relates to a vibrating device for large-volume concrete pouring construction of a fan foundation, the vibrating device comprises a vibrator, and one end of the vibrator is electrically connected with a vibrating rod through a connecting wire; a scraping mechanism is arranged on the surface of the vibrating rod, the scraping mechanism comprises a lantern ring fixedly connected to the surface of the vibrating rod in a sleeving mode, the interior of the lantern ring is hollow, an electric push rod is fixedly installed in the lantern ring, and a connecting rod is fixedly installed at the output end of the electric push rod; through reciprocating operation, concrete adhered to the surface of the vibrating rod can be quickly cleaned, so that the situation that the concrete on the surface of the vibrating rod is hardened and solidified, and subsequent cleaning is difficult is effectively avoided. And meanwhile, workers do not need to clean, so that the workload of the workers is reduced, and efficient cleaning operation can be achieved.

The invention relates to the technical field of water conservancy projects, in particular to a cofferdam for ship lock transformation and a construction method. A cofferdam for ship lock transformation comprises concrete cofferdam bodies and hollow concrete supporting structures, the concrete cofferdam bodies are tightly attached to the wall faces on the two sides of a ship lock and extend in the water flow direction, and the hollow concrete supporting structures are arranged between every two adjacent concrete cofferdam bodies. The hollow concrete supporting structure is fixedly connected with the concrete cofferdam body through a connecting device, the hollow concrete supporting structure comprises a bottom layer, a hollow layer and a top layer, a plurality of rows of cavities arranged side by side are formed in the hollow layer, and blasting devices are pre-buried in the concrete wall between every two adjacent cavities at equal intervals. The concrete cofferdam body is tightly attached to the wall face of the ship lock, a stable water retaining barrier can be formed, the self weight can be reduced through the design of the hollow layer, and compared with traditional mechanical or manual dismantling, efficient and controllable dismantling can be achieved through the blasting device embedded in the supporting structure, and the construction period can be greatly shortened.

The invention discloses a stair energy consumption ship collision prevention system based on a metamaterial structure, which comprises an ultra-high performance concrete panel, a stair energy consumption collision prevention layer, a rubber fender, a bridge pier, a bridge bearing platform and a bridge pile foundation, and the stair energy consumption collision prevention layer comprises a variable rigidity unit, a light energy consumption material, a vertical steel plate, an upper top plate and a lower bottom plate, the variable rigidity unit is formed by connecting a plurality of concave hexagonal units through transverse and longitudinal steel plates, and the middle hollow structure is filled with light energy dissipation materials capable of absorbing and dispersing impact energy, such as polyurethane foam, ceramsite and rubber particles. The variable rigidity unit and the steel plates are welded into a whole, and the protection device and the protected pier are connected through a rubber fender. The overall rigidity of the protection device can be increased along with structural deformation when the protection device is impacted, so that the variable-rigidity cascade energy dissipation anti-collision effect is achieved, the ship and bridge collision time can be effectively prolonged, the ship collision force can be effectively reduced, and bidirectional protection of the ship and the bridge is achieved.

The invention discloses a lightweight concrete safety energy storage cabinet and a preparation method thereof, and the lightweight concrete safety energy storage cabinet is obtained by injecting lightweight concrete into a mold and performing steam curing; the lightweight concrete is prepared from the following raw materials in parts by weight: 20 to 40 parts of cement, 8 to 20 parts of silica fume, 8 to 25 parts of slag powder, 0 to 10 parts of fine sand, 15 to 35 parts of lightweight fine ceramsite sand, 0 to 21 parts of coarse ceramsite sand with the particle size of 5 to 10 mm, 0 to 3 parts of steel fiber, 0 to 1.5 parts of PP fiber, 0.5 to 2.0 parts of polycarboxylic acid type water reducing agent, 0 to 14 parts of hollow glass beads, 0.1 to 0.5 part of release agent and water. Wherein the water-binder ratio is 0.15 to 0.22; the use amounts of the steel fibers and the PP fibers are not 0 at the same time; the light ceramsite sand and the coarse ceramsite sand are subjected to pre-wetting treatment before being used; the fireproof, explosion-proof and heat-insulating material has the characteristics of light weight, safety and impermeability, and has excellent fireproof, explosion-proof and heat-insulating properties.

The invention discloses a self-repairing waste felt-based carbon fiber electromagnetic shielding concrete structure and a design method, and relates to the field of protective engineering building materials and multifunctional concrete structural design, the self-repairing waste felt-based carbon fiber electromagnetic shielding concrete structure comprises a base material, waste felt-based carbon fibers, hollow glass microsphere cell bodies and a synergistic enhancement mechanism, the base material comprises cement, silica fume, quartz sand and a high-efficiency water reducing agent, the waste felt-based carbon fibers are crushed to the particle size of 50-100 meshes, the crushed waste felt-based carbon fibers are modified by a specific silane coupling agent and then are uniformly dispersed in the ultra-high performance concrete base, graphene or carbon nanotube conductive particles are combined and doped, and the ultra-high performance concrete is prepared. A continuous three-dimensional conductive network is formed, the electromagnetic shielding effectiveness in the wide frequency band of 1-40 GHz reaches 30 dB or above, compared with a traditional metal shielding layer, the weight is reduced by 60%, the cost is reduced by 50%, and meanwhile the problem of metal corrosion is avoided.

The invention discloses large open type karst cave local rock forming equipment and method, and belongs to the technical field of karst area pile foundation construction. The problems that in traditional cloth bag pile construction, the hole collapse risk is high, the bearing capacity is insufficient, and grouting displacement of a steel reinforcement framework occurs are mainly solved. According to the equipment, grout overflow holes distributed in a staggered mode are preset in a variable-diameter hollow steel cylinder body, and a grout overflow groove is formed in the variable-diameter part of the cylinder bottom; the diameter of the upper part of the coarse structure is larger than that of the lower part of the coarse structure; the steel sleeve is anchored at the top of the steel cylinder and has larger diameter; the cylindrical plastic sleeve is adhered to the inner wall of the steel cylinder; the grouting pipe is arranged in the cylindrical plastic sleeve in a penetrating manner; and the annular hoop surrounds the outer side of the fiber bag through the plastic short pipe to form a bamboo-shaped constraint structure. The upper end of the fiber bag is anchored to the steel sleeve, and the lower end of the fiber bag is anchored to an anchor hole in the bottom of the steel cylinder. The equipment is used for large open type karst cave pile foundation construction, the hole collapse resistance is improved through a composite structure of the steel cylinder and the fiber bag, the bearing capacity is increased, and grouting displacement is prevented.

The utility model discloses a combined hollow floor support plate. The combined hollow floor support plate comprises a bottom plate, a box body and a connecting piece, the length of the bottom plate is the span of the floor system, and the width is multiple of a plurality of box bodies; the plurality of box bodies are longitudinally arranged and fixed at intervals on the bottom plate; the box bodies are connected through connecting pieces in the longitudinal direction. And the three components form a combined hollow floor support plate for bearing during floor system construction, and also serve as a template of post-pouring concrete and a bottom surface protection layer of the post-pouring concrete. A plurality of hollow floor bearing plates are transversely and closely spliced and fully paved on floor cover plate spans, gaps among the box bodies are paved with steel bars, concrete is poured later to form bidirectional floor cover ribbed beams, concrete is poured later on the top surfaces of the box bodies to form inter-rib panels, and the building floor cover meeting the using function bearing requirement is formed. The utility model is suitable for medium and large span floor systems, has the advantages of simple manufacture, low cost, no formwork and support, fast and convenient construction, light floor system dead weight, complete bidirectional stress, excellent mechanical property and the like, and meets the key index of'double saving 'of steel bar consumption and concrete consumption compared with the traditional cast-in-place beam slab floor system.

The utility model relates to the technical field of bridge reinforcement, and discloses a bridge hollow slab girder reinforcement structure and a bridge, which comprises a plurality of hollow slab girders arranged side by side, a plurality of webs are arranged in each hollow slab girder, the bottom surface of each hollow slab girder is provided with longitudinal reinforcers, the number of the longitudinal reinforcers is equal to that of the webs, and the longitudinal reinforcers are in one-to-one correspondence with the webs. The longitudinal reinforcements are arranged in the longitudinal direction of the bridge and comprise upper-layer sticky steel plates and lower-layer sticky steel plates, and the upper-layer sticky steel plates are located between the hollow slab girders and the lower-layer sticky steel plates; the transverse reinforcements are arranged in the transverse direction of the bridge, and all the longitudinal reinforcements are located between the transverse reinforcements and the hollow slab girders. According to the utility model, the problem that a bridge with high requirement on the strength of a reinforcing structure cannot be stably reinforced by a sticky steel plate reinforcing structure in the prior art is solved.

The present invention relates to the technical field of water conservancy engineering, and specifically to a cofferdam for ship lock reconstruction and a construction method. A cofferdam for ship lock reconstruction comprises a concrete cofferdam body and a hollow concrete support structure. The concrete cofferdam body is closely attached to the walls on both sides of the ship lock and extends along the direction of water flow. The hollow concrete support structure is arranged between two adjacent concrete cofferdam bodies. The hollow concrete support structure is fixedly connected to the concrete cofferdam body by a connecting device. The hollow concrete support structure comprises a bottom layer, a hollow layer, and a top layer. Multiple rows of cavities arranged in parallel are formed inside the hollow layer. Blasting devices are equidistantly embedded in the concrete wall between two adjacent cavities. This application forms a stable water retaining barrier by placing the concrete cofferdam body close to the ship lock wall. The hollow layer design can reduce its own weight. In addition, the blasting device embedded in the support structure can achieve efficient and controllable demolition compared to traditional mechanical or manual demolition, which can greatly shorten the construction period.

The invention belongs to the field of assembly type building construction, and particularly relates to an assembly type building module positioning and connecting structure which comprises two stand columns and a plurality of transverse columns arranged between the two stand columns, a plurality of mounting parts are arranged on the outer sides of the stand columns, and hollow blocks are slidably arranged on the sides, close to each other, of the two corresponding mounting parts. Rectangular blocks are fixedly arranged on the front sides of the hollow blocks, connecting pieces are arranged on the outer sides of the left end and the right end of the transverse column, and butt joint blocks connected with the rectangular blocks in an inserted mode are fixedly arranged on the rear sides of the connecting pieces. In the process that the transverse column is installed on the stand column, the butt joint block and the rectangular block can be rapidly installed through the installation piece and the connecting piece, then the transverse column and the stand column can be rapidly installed through the locking assembly, bolt holes or welding grooves do not need to be formed in the stand column and the transverse column, and the installation efficiency is improved. The problem that the strength of the stand column and the transverse column is weakened due to trepanning is effectively solved, and the structural strength and stability of the stand column and the transverse column in the using process are guaranteed.

The embodiment of the invention provides an intelligent maintenance device for hollow slab girder inner cavity operation, and relates to the technical field of bridge maintenance. The supporting leg controller is started, the crawler-type wheel sets are tightly jacked in a bottom plate of an inner cavity of the hollow slab girder through the foldable supporting legs, the driving wheels are driven by the wheel set control system, the driven wheels are driven by the driving wheels to rotate, the crawler belts are driven by the driving wheels and the driven wheels to move, and the movement of the crawler belts enables the maintenance device to move in the inner cavity of the hollow slab girder. Efficient and convenient polishing treatment operation can be conveniently carried out on the inner cavity of the hollow slab beam; a brush head connecting rod of the polishing assembly is adjusted through a telescopic connecting piece to adapt to the space size of the inner cavity; a grinding assembly disc is started, eight telescopic grinding brushes are distributed on the grinding assembly disc, and comprehensive and careful grinding operation on the inner cavity of the hollow slab girder can be achieved through rotation of the grinding assembly disc; construction waste such as powder generated by grinding enters a waste collecting box through a pipeline in the middle of the grinding brush via the interior of a disc of the grinding assembly; a series of high-definition cameras are arranged in the circumferential direction of the detection and evaluation disc, effect pictures of the inner cavity after polishing are collected and input into an evaluation system to automatically evaluate the roughness after polishing, and therefore the requirement for intra-cavity grouting maintenance is met. The device can greatly improve the quality and efficiency of polishing operation, so that reliable cohesiveness of an inner cavity of the hollow slab beam and a grouting maintenance material is guaranteed, and the shear bearing capacity of the hollow slab beam is improved.

The utility model provides a hot-melt welding device for forming a box by using a hollow plate, which comprises a rack provided with a working surface and a cross beam, a box plate positioning strip is arranged on the working surface, and the cross beam is erected above the working surface; the hot melting guide-in plate is provided with a guide-in opening which is opened towards the left side, is used for supporting one side of the boxboard, and is arranged below the cross beam through a first connecting frame; the hot air gun is connected with the beam through a moving mechanism, and the heating end of the hot air gun enters or exits from the hot melting position through up-and-down and left-and-right movement; the front pressing wheel set and the rear pressing wheel set are used for conveying the boxboards and pressing the hot-melted boxboards correspondingly. The device is simple in overall structure, low in maintenance cost and high in hot melting welding efficiency; and the conveying and welding stability of the boxboards is improved.

The invention provides a high-efficiency electric heating system suitable for a gas-solid fluidized bed, and the system comprises the fluidized bed which is provided with a gas inlet, a gas outlet, a material inlet and a material outlet, and is internally provided with solid particles; the heat transfer assembly comprises a plurality of hollow objects arranged in the fluidized bed, and part of the solid particles are contained in the plurality of hollow objects; wherein at least a first part of the hollow object is used for being connected with a power supply end, and a second part of the hollow object is not electrified; and the first part of the hollow object is a graphite electrifying body. Through the system provided by the invention, the loss of the coil is recovered, and the effective utilization rate of electromagnetic induction heating is greatly improved.

The invention discloses a combined structure of an assembled ditch and a retaining wall and a construction method thereof, and belongs to the technical field of agriculture and forestry land reclamation. The structure comprises a ditch and a retaining wall, the ditch is formed by interlocking and clamping a bottom plate and a wall plate through a broken-line-shaped groove and a tenon, and the outer side of the ditch is wrapped with hydraulic cloth and a hydraulic film in a layered mode to enhance the impermeability; the retaining wall adopts the right triangle buttress and the hollow reinforced concrete baffle, is fixed through the plug pin and is connected with the ditch through the inhaul cable in the threading pipe, so that the anti-overturning and anti-sliding stability is improved. The construction method comprises the steps of prefabricating the components, laying impermeable materials in a layered mode, conducting modular assembling, conducting backfilling and greening and the like. Through structure optimization and standardized prefabrication, the problems that a traditional cast-in-place structure is long in construction period, high in manufacturing cost and the like are solved, and the advantages of being rapid in assembly, multiple in seepage prevention, capable of saving cost and environmentally friendly are achieved. Compared with a cast-in-place scheme, the comprehensive manufacturing cost is reduced, the construction efficiency is remarkably improved, and the water and soil loss prevention and control effect is better.

The invention relates to a method for rinsing a machining front (4) in a hollow structure (2) formed by material removal in a workpiece (1), preferably in a substrate for an optical element. The method comprises: arranging a free end (8) of a preferably flexible fluid line (7) in the region of the machining front (4). In the method, to rinse the machining front (4), the fluid (6) is supplied to the machining front (4) through a space (9) between an outer surface (10) of the fluid line (7) and a circumferential surface (5) of the hollow structure (2) and discharged from the machining front (4) within the fluid line (7). The invention also relates to a device (12) configured for carrying out the method.

The invention belongs to the field of composite piles, and provides a civil engineering composite pile structure which comprises two hollow column piles which are symmetrically arranged, a plurality of steel sheet piles are arranged between the two hollow column piles, a connecting sheet pile is arranged between the hollow column piles and the steel sheet piles, and a connecting mechanism is further arranged in the connecting sheet pile. The connecting mechanism is used for connecting a hollow column pile and a steel sheet pile to the outer surface of a connecting sheet pile, the connecting mechanism comprises guide inner grooves, the guide inner grooves are formed in the two sides of the connecting sheet pile, gap baffles are movably arranged in the guide inner grooves, limiting baffles are fixedly installed on the edge portions of one sides of the gap baffles, and fixing inner cavities are symmetrically formed in the middle of the connecting sheet pile; an extrusion structure is further arranged in the fixed inner cavity; through the synergistic effect of the connecting sheet pile, the gap baffle and the extrusion structure, the gap between the hollow column pile and the steel sheet pile can be actively filled, the problem of concrete pouring disconnection is avoided, and the overall connecting strength of the combined pile is improved.

The invention discloses a pile machine drilling positioning device for building foundation construction, and relates to the field of building foundation construction, the pile machine drilling positioning device comprises a pile foundation hole pedestal, the pile foundation hole pedestal is arranged in a through mode, and a through pile foundation drill rod positioning cylinder is arranged in a through cavity of the pile foundation hole pedestal in a penetrating mode; the hollow cavity of the pile foundation drill rod positioning cylinder is used for a pile machine drill rod to movably pass through; a plurality of positioning clamping plates are arranged in the pile foundation drill rod positioning barrel, and the ends, close to the inner wall of the pile foundation drill rod positioning barrel, of the positioning clamping plates are used for being connected to a lifting pedestal through movable mechanisms. The lifting pedestal is used for being connected to the top end of the pile foundation hole pedestal. The hollow cavity of the pile foundation hole pedestal is provided with a connecting mechanism used for driving the positioning clamping plates to move synchronously through the moving mechanism. The positioning device is convenient to assemble, disassemble and move, and time and labor cost can be saved; in addition, centering, positioning and adjusting of the drill rod can be rapidly achieved, and the position accuracy and the drilling quality in the drilling process are guaranteed.

The invention discloses a stirring device for building construction, and belongs to the technical field of building construction. Comprising a stirring barrel, a stirring cavity is integrally formed in the upper surface of the stirring barrel, a sealing cover plate is fixedly connected to the upper surface of the stirring barrel through a plurality of bolts, a control box is fixedly connected to the upper surface of the sealing cover plate, and a feeding opening is fixedly connected to the position, located on the right side of the control box, of the upper surface of the sealing cover plate; a motor is controlled to drive a rotating rod to rotate, reverse rotation of a hollow rod and the rotating rod is achieved by means of meshing transmission of a first bevel gear, a third bevel gear and a second bevel gear, then a first stirring blade and a second stirring blade are driven to conduct reverse stirring, and strong convection and shearing effects can be formed in a reverse stirring mode; the problem of insufficient mixing caused by single stirring direction of the existing stirring device is effectively solved, and the stirring quality is greatly improved.

The invention belongs to the technical field of cranes, and discloses a stable feeding device for building construction, the stable feeding device comprises a crane body, the bottom end of the crane body is provided with a vehicle bottom groove, the two sides of the top end of the vehicle bottom groove are both provided with first supporting parts, and the first supporting parts are each provided with a second supporting part; deep anchor points are formed through the conical head and the ground pressure plate, first-level anchoring is formed, deflection-free downward moving positioning can be carried out for different stratums, high-strength supporting operation is achieved, the multiple sets of supporting shaft columns are adaptive to concave-convex ground through the abutting plate, multiple supporting points are expanded, second-level assistance is achieved, the number of the supporting points is increased, and the supporting area is expanded. A more stable mechanical structure is formed, lateral torque and sudden load impact can be effectively resisted, the probability of occurrence of overturning accidents is reduced, the stable state of the crane body during hoisting and feeding of building materials is guaranteed, the supporting shaft column is in linkage with the hollow ring through the supporting shaft rod, the field angle is automatically adjusted along with the anchoring depth, and load distribution is optimized.

The invention relates to the technical field of sound insulation materials, in particular to a high-performance sound insulation material for buildings and a preparation method thereof, and the high-performance sound insulation material comprises the following raw materials in parts by weight: 60-80 parts of polypropylene, 15-25 parts of filler, 10-20 parts of talcum powder, 5-15 parts of flexibilizer, 0.2-1 part of antioxidant and 0.2-0.4 part of light stabilizer. According to the invention, the SEBS with high damping performance is utilized to provide a main viscoelastic effect, and the density performance of the material can be directly increased by combining the barium sulfate material with high density, so that the low and medium frequency sound insulation function is improved, and the hollow glass beads can utilize the spherical surfaces to cause scattering and refraction of sound waves and disturb the propagation direction of the sound waves in the hollow glass beads; meanwhile, in cooperation with the high radius-thickness ratio state of the mica sheet, sound waves are further dispersed and refracted in combination with the hollow glass beads, the conduction path of the sound waves is prolonged, and therefore the medium-high frequency sound insulation performance is improved, and the sound insulation performance of the material is effectively improved.

The invention provides a supporting device for an assembly type laminated slab and a construction method. Two supporting frames in the supporting device are arranged in a spaced mode and located on corresponding bases respectively. Each supporting frame comprises a front vertical rod, a rear vertical rod, an upper transverse rod and a lower transverse rod which form a frame structure in a surrounding mode, the rear vertical rods are connected with the corresponding bases, the upper transverse rods and the lower transverse rods are hollow pipes, and the front ends, away from the rear vertical rods, of the upper transverse rods and the lower transverse rods are open. The two ends of the upper connecting rod are arranged in the corresponding upper transverse rods of the two supporting frames in a sleeved mode respectively. The two ends of the lower connecting rod are arranged in the corresponding lower transverse rods of the two supporting frames in a sleeved mode respectively. And the plurality of tie pieces are distributed on a supporting rod body structure formed by the two lower cross rods and the lower connecting rod in the extending direction of the lower cross rods. The supporting device for the fabricated laminated slab is mounted in an upright manner, does not occupy the lower space, does not need to consider the concrete strength of a lower floor during construction, is higher in construction efficiency, is positioned at the upper part of a construction floor surface, and does not involve high-altitude operation during mounting and dismounting.

The utility model discloses a recycled aggregate concrete dense rib hollow three-dimensional planting wall which comprises a planting wall body, a plurality of hollow building blocks are arranged on the planting wall body, a plurality of placing through holes are formed in the hollow building blocks, and a plurality of planting boxes are detachably inserted into the placing through holes. As an assembly type building, the whole wall body is processed and completed in a factory, when the wall body is used, the wall body only needs to be hoisted to a corresponding position, meanwhile, corresponding planting boxes can be added, different crops can be planted, the attractiveness of the wall body is improved, meanwhile, the planting area can be increased, and due to the fact that the planting boxes are detachable, the wall body is convenient to use. Different shapes can be designed, meanwhile, when typhoons come in coastal areas, the planting boxes can be detached, the containing through holes of the hollow building blocks become ventilation through holes, and the wind resistance of the hollow building blocks is improved.

The invention discloses a damper anti-seismic system and method based on torsional energy dissipation of hollow round pipes. The damper anti-seismic system comprises a frame beam, a frame column, a cantilever wall and a torsional energy dissipation damper. The frame beams and the frame columns are connected with a building, the cantilever walls are connected with the frame beams, and the torsional energy dissipation dampers are arranged between the paired cantilever walls and connected with the cantilever walls to dissipate energy transmitted by the cantilever walls. According to the damper anti-seismic system, the torsional energy dissipation damper is arranged, a metal structure system is adopted, the liquid leakage risk of a traditional viscous damper is avoided, building vibration energy is evenly consumed through ingenious cooperation of a metal structure, and the anti-seismic performance of a building structure is improved. Due to the arrangement of the multi-section type hollow energy dissipation pipe fittings and the paired energy dissipation pipe fittings, the energy dissipation effect of the torsional energy dissipation damper is improved, the stability of the torsional energy dissipation damper is improved, fatigue fracture at the connecting position is avoided, and the service life of the torsional energy dissipation damper is prolonged.

The invention belongs to the field of slitting devices, and particularly relates to a sports building material steel pipe slitting device which comprises a bed body, and a cutting assembly, a fixing assembly, a preheating assembly and a guiding assembly are sequentially arranged on the top of the bed body in the horizontal direction. The cutting assembly is used for slitting a steel pipe and comprises a vertical plate. The vertical plate is fixedly mounted at the top of the bed body; the top of the vertical plate is fixedly connected with an air cylinder; the output end of the air cylinder is fixedly connected with a connecting base, and the connecting base is in sliding connection with the inner wall of the vertical plate. A first motor is fixedly mounted on one side of the connecting seat; the output end of the first motor is fixedly connected with a cutter; through the matching effect of the heating plate and the hollow pipe, heating airflow can be sprayed out through the heating plate and preheats the surface of the steel pipe, so that the temperature of a steel pipe material is increased, the plasticity is improved, the cutting work of a cutter on the steel pipe is facilitated, the roughness of the cutting surface of the steel pipe is reduced, and the cutting surface is smoother.

The invention relates to the technical field of building materials, and provides a sound-insulation fireproof building material and a preparation method thereof. The sound-insulation and fireproof building material is prepared from, by weight, 100 parts of flame-retardant wood fiber, 15-30 parts of adhesive, 5-6 parts of hollow glass beads and 1-3 parts of waterproof agent, a preparation method of the flame-retardant wood fiber comprises the following steps that a flame retardant is dispersed in a solvent, wood fiber is added, mixing and drying are conducted, and the flame-retardant wood fiber is obtained; and the flame retardant comprises a 2, 4-dihydroxy-5-pyrimidine boric acid and / or a phenyl phosphate compound. By means of the technical scheme, the problem that in the prior art, sound-proof and fireproof building materials are poor in flame retardant property is solved.