675 results about "Composite slab" patented technology

The utility model discloses a double-layer transportation device for an assembly type laminated slab component, and particularly relates to the technical field of transportation devices, which comprises an upper-layer I-shaped steel freight frame, bracket upright posts and a bottom-layer I-shaped steel freight frame, the bottom-layer I-shaped steel freight frame is connected with the upper-layer I-shaped steel freight frame at least through four bracket stand columns which are uniformly distributed; one end of each bottom-layer I-shaped steel freight frame is connected with a bracket stand column through a bracket base, the bottom of each bracket stand column is fixedly installed on the top of the corresponding bracket base, and the top of each bracket stand column is detachably connected with the end of the corresponding upper-layer I-shaped steel freight frame. The upper-layer I-shaped steel freight frame, the bracket stand columns, the bracket base and the bottom-layer I-shaped steel freight frame are constructed into the double-layer freight frame, so that the upper-layer I-shaped steel freight frame and the bottom-layer I-shaped steel freight frame can be used for storing and transporting laminated slabs, a traditional single-layer laminated slab freight frame is replaced, the transportation time is greatly saved, and the transportation efficiency is improved. Freight cost is reduced, and overall construction efficiency is improved.

The invention discloses a steel pipe truss assembly type prestressed concrete laminated slab, and relates to the field of concrete laminated slabs. Comprising an internal PVC pipeline arranged in a concrete laminated slab, a PVC pipeline and a first internal steel pipe truss which are poured and fixed in the concrete laminated slab, and an external steel pipe truss which is connected to a second internal steel pipe truss in a threaded fit manner; when the grouting mechanism is connected to the end of the PVC pipeline, concrete sequentially passes through the PVC pipeline, the internal PVC pipeline, the first internal steel pipe truss, the second internal steel pipe truss, the external steel pipe truss and the grouting hole to be injected into the peripheral connecting position of the concrete laminated slab. The concrete laminated slab is provided with three modules, and the purposes that the connecting strength of the connecting positions of the concrete laminated slab is improved, concrete is convenient to pour and fix, and the position of the concrete laminated slab is convenient to adjust can be achieved.

The invention provides a composite pile foundation structure for road surface rigidity optimization of a road transition section and a design and use method of the composite pile foundation structure, and relates to the technical field of composite pile foundations. The composite pile foundation structure can be applied to an embankment foundation and a bridge abutment pile foundation and comprises a bearing platform, a pile cap, a gasket, an elastic composite plate, replaceable filler, a pile and a pile end self-adaptive deformer. The design and use method of the bridge abutment pile foundation is guided by the load settlement characteristic of the butted roadbed, and the design and use method of the embankment composite pile foundation is guided by the settlement control standard. Design variables comprise the pile length, the pile diameter, the pile number, the compression thickness of the elastic composite plate, the arrangement depth of the replaceable filler, the limit pile side friction resistance of the replaceable filler and the compression modulus of the replaceable material, the structure can optimize the overall rigidity of the road surface on one side of the abutment, the phenomenon of bump of the abutment is effectively avoided, zero-differential settlement is achieved theoretically, and the construction efficiency is improved. And the settlement index can be controlled in the application of an embankment foundation.

A brazing-sheet manufacturing method includes superposing a core-material slab on or adjacent to at least one surface of a filler-material slab to form a clad slab, the core-material slab being composed of an aluminum material and the filler-material slab being composed of an Al—Si—Mg series alloy. Then, the clad slab is hot rolled to form a clad sheet having a core material layer composed of the aluminum material of the core-material slab and a filler material layer composed of the Al—Si—Mg series alloy of the filler-material slab. Then, the clad sheet is subjected to one or more passes of cold rolling. Either between cold-rolling passes or after the completion of the cold rolling, a surface of the clad sheet is etched using a liquid etchant that includes one or more inorganic acids. The liquid etchant does not contain fluorine atoms.

The present disclosure provides a production method and a mold for a ribbed prestressed composite slab of self-compacting concrete, including a long-line table bottom mold, side molds, end molds and a top mold. Side molds are respectively connected to the long ends of the long-line table bottom mold. The top mold is arranged at the upper end of the long-line table bottom mold, and both ends of the top mold are respectively connected to the corresponding side molds. End molds are respectively connected to the short ends of the long-line table bottom mold, and the shape of the upper edge of the end mold matches the shape of the side edge of the top mold. Both ends of the end mold are respectively connected to the corresponding side molds to form a cavity with an accommodating space. A number of holes through which prestressed steel wires can pass are provided on the end mold, and leak-proof plugs are detachably connected to the holes. The structure of the present disclosure is simple, which can make the construction of prestressed concrete composite slabs faster and more convenient, and at the same time can reduce the labor intensity of workers and improve production efficiency.

The invention relates to the technical field of intelligent positioning of building construction, in particular to an intelligent positioning method and system for fabricated building laminated slabs based on AR and UWB. According to the method, a physical monitoring network comprising a UWB positioning base station and a visual positioning target is constructed, a digital operation instruction generated by analysis of a cloud BIM model is converted into a virtual contour superposed on a real operation plane by using an AR augmented reality technology, and further, the position deviation is calculated in real time and a sound-light alarm mechanism is combined, so that the real-time positioning of the cloud BIM model is realized. A construction quality closed-loop control system of real-time monitoring, alarming, adjusting and compliance is established, it is ensured that the laminated slab meets the design precision requirement in the installation process, and later reworking and rectification caused by installation errors are effectively avoided; meanwhile, based on data interaction of the cloud BIM management platform, full-process digital management from design model issuing to final installation position data returning is achieved, and reliable data support is provided for construction quality tracing and acceptance of the fabricated building.

The invention discloses a high-strength waterproof heat-preservation composite board which comprises an upper surface layer, a lower surface layer and a heat-preservation core material arranged between the upper surface layer and the lower surface layer, and further comprises a three-dimensional skeleton which is embedded in the heat-preservation core material, is used for providing a mechanical supporting frame for the whole composite heat-preservation board and can be actively repaired when being damaged. The three-dimensional framework is composed of a Z-direction fiber column, an integrated upper surface net layer and an integrated lower surface net layer, the upper surface net layer and the lower surface net layer are connected to the upper end and the lower end of the Z-direction fiber column, a cavity is formed in the Z-direction fiber column, and the cavity is filled with repairing fluid. A force transmission network is constructed through cooperation of three-dimensional framework gradient distribution and a dislocation anchoring system, the overall rigidity is ensured, meanwhile, the edge stress area is enhanced, interlayer stripping is avoided, and the bending resistance and impact resistance are improved. The surface microcapsules and the internal Z-direction fiber column repairing fluid form a dual self-healing mechanism, so that full-scale repairing from microcracks to through damage is realized, the durability of the material is improved, and the maintenance cost of the whole life cycle is reduced.

The invention belongs to the technical field of stainless steel composite plates, and particularly relates to an iron-nickel stainless steel composite plate production process which comprises the following steps: performing plasma sputtering cleaning on a carbon steel base layer; the iron-nickel-stainless steel composite layer is subjected to laser micro-cladding treatment to form a micro-groove array, and a nano nickel-titanium alloy transition layer is preset in the micro-groove array; explosive cladding is carried out in a helium and argon mixed gas environment with the oxygen content smaller than or equal to 10 ppm, so that the carbon steel base layer and the iron-nickel-stainless steel cladding layer are subjected to interface metallurgical bonding to form a composite plate blank; the composite plate blank is hot-rolled and water-cooled to 500 DEG C or below after being heated and subjected to heat preservation; and the rolled composite plate blank is placed in mixed gas of nitrogen and hydrogen for isolation annealing, the bonding strength and the shearing strength are improved through an interface gradient diffusion layer composite structure constructed through the nanoscale, and interface oxidation and stress concentration in the rolling process are inhibited through asymmetrical rolling and a nanometer heat insulation coating; and multi-stage controlled cooling and diffusion barrier annealing are cooperatively regulated and controlled, so that the pitting corrosion resistance potential of the iron-nickel stainless steel clad layer is improved.

The invention discloses a UHPC (Ultra High Performance Concrete) formwork-removal-free combined node linear coupling beam shear wall and a construction process thereof. The UHPC formwork-removal-free combined node linear coupling beam shear wall comprises a post-cast reinforced concrete shear wall, a UHPC formwork-removal-free, a laminated slab, a concrete-filled steel tube positioning bolt and a shear wall embedded column, the UHPC non-dismantling formwork comprises a non-perforated formwork body and a perforated formwork body, perforated steel plates are evenly pre-buried in the inner side of the non-perforated formwork body and evenly pre-buried in the inner side of the perforated formwork body, round holes are reserved in the corresponding positions of the perforated steel plates, one side of a screw sequentially penetrates through the round holes of the perforated formwork body and the perforated steel plates, and the screw is arranged between the perforated formwork body and the non-perforated formwork body. The other side of the screw rod is preliminarily fixed through a first nut on the inner side of the non-perforated formwork, and U-shaped shear nails are arranged on the inner side of the non-perforated formwork and the inner side of the perforated formwork. According to the UHPC formwork-removal-free combined type node linear coupling beam shear wall and the construction process thereof, on-site quick assembly sealing and precise assembly are achieved, the formwork removal procedure is omitted, the assembly rate is increased, and the later maintenance cost is reduced.

The present invention relates to the technical field of bridge engineering. Particularly disclosed are a steel shell-concrete composite orthotropic bridge deck structure and a fabrication method and device. The steel housing-concrete composite orthotropic bridge deck structure comprises a steel shell structure, infilled concrete, longitudinal and transverse stiffening ribs arranged at the bottom of the steel shell structure, and a deck-end connecting structure, wherein the steel shell structure comprises an upper steel plate and a lower steel plate that are arranged in parallel, and a plurality of perforated T-shaped ribs arranged in parallel in a longitudinal direction. Webs of the perforated T-shaped ribs are welded to the upper steel plate, flanges are riveted to the lower steel plate, the upper steel plate and the lower steel plate are connected into the steel shell structure, and reinforced concrete tenons formed by the perforated T-shaped ribs and core bar reinforcements and shear bolts anchor the upper steel plate and the lower steel plate in the infilled concrete to form a steel shell-concrete composite deck that bears loads jointly. The present invention provides high bending stiffness, solves the problem of fatigue at welds between the stiffening ribs and a steel top plate, fully utilizes the properties of a steel shell and concrete, and solves the problems of the crackability under a negative bending moment and excessive weight of a traditional composite bridge deck.

A deck board system for integrating artificial turf and drainage features includes a plurality of deck board panels, each with an extruded or pultruded panel body featuring an internal screw boss, an internal reinforcement strip, an overhang, a ledge, drainage openings on the topside, and underside openings. The system further comprises a finishing feature and an artificial turf layer. The overhang engages with adjacent panels, while the finishing feature straddles at least two panels and engages with the overhang. The artificial turf layer covers one or more deck board panels, providing a seamless and functional deck surface with integrated drainage capabilities.

Lightweight composite building panels with incorporated drainage layer that facilitates moisture removal and methods of manufacturing and using lightweight composite building panels with incorporated drainage layer. The lightweight composite building panels with incorporated drainage layer can be used to applied a desired finish to exterior wall and roof structures. The lightweight composite building panels include a core composite panel structure and a drainage layer attached or bonded thereto. The core composite panel structure includes a foam core sandwiched between first and second protective layers, such as a fiber mesh reinforced cementitious composition and / or cured thermoset resin or other rigid material. The drainage layer is designed to face an exterior wall or roof structure to facilitate removal of moisture between the panels and underlying wall or roof structure. The building panels can be cut, drilled, and screwed, nailed, or glued to structural elements of buildings, such as OSB sheathing.

The invention relates to a construction technology and a construction method for a composite pile foundation by recycling old piles. The method comprises the steps that firstly, a soil body is excavated to a certain depth on an old pile foundation, the integrity and durability of old piles are detected, and the old piles which do not meet the recycling requirement are cut off and abandoned; in order to improve the bearing capacity of the foundation, new cast-in-situ bored piles are complementarily driven below the elevation of the cut-off old piles, and a new and old pile combined bearing structure is formed; leveling the pile heads of the cut old piles and new piles, binding steel bars, and pouring to form a reinforced concrete laminated slab; and a second layer of new piles are constructed above the laminated slab, pile heads of the new piles and the reserved complete old pile heads are connected through a bearing platform to jointly bear, and finally the laminated pile foundation with the high bearing performance is formed. The use amount of new piles in old building and bridge reconstruction can be remarkably reduced, and carbon emission of a newly-built pile foundation project is reduced. Moreover, the second-layer structure of the laminated pile foundation can be backfilled with soil and can also be combined with underground parking lots, underground markets and the like, and a new building underground space utilization scheme is provided.

The invention provides a pre-stressed high-strength fiber concrete prefabricated laminated slab, and relates to the technical field of prefabricated laminated slabs, the pre-stressed high-strength fiber concrete prefabricated laminated slab comprises a steel bar net rack which is laid at the bottom in an overhead manner, and the steel bar net rack is arranged in a horizontal state; the steel bar truss is detachably arranged on the steel bar net rack, and the steel bar truss is located above the steel bar net rack; the connecting hooks are connected to the steel bar net rack in a clamped mode, and the connecting hooks are distributed on the side wall of the steel bar net rack in a rectangular mode; the concrete layer is poured outside the steel bar net rack in a wrapping mode, and the ends of the steel bar trusses and the ends of the connecting hooks are exposed outside the concrete layer. The detachable design is adopted between the steel bar net frame and the steel bar truss, construction and connection of the steel bar net pieces can be rapidly completed, then the pouring efficiency of the prefabricated laminated slab is greatly improved, and the prefabricated laminated slab has the advantages of being simple in structure and convenient and fast to operate.

The utility model belongs to the technical field of home decoration materials, and relates to a film veneer solid wood composite floor which sequentially comprises a soft film, a wood composite board, a core board and a back board from top to bottom, the texture direction of the soft film is consistent with the surface texture direction of the wood composite board attached to the soft film, and the surface texture direction of the core board is consistent with the surface texture direction of the wood composite board attached to the core board. The wood composite board is formed by longitudinally assembling and arranging an upper layer board and a lower layer board according to the texture direction, and the wood composite board, the core board and the back board are longitudinally, transversely and longitudinally arranged in a staggered mode according to the wood texture. According to the utility model, low-grade hard wood, fast-growing wood plates and the like are used as raw materials, and the functions of scratch resistance, stain resistance, antibiosis, impact resistance, corrosion resistance, good thermal stability and the like of soft film materials are utilized, so that the characteristics of high-quality foot feeling, temperature regulation and humidity regulation of wood and the excellent functional performance of the soft film materials are integrated; the disclosed film veneer solid wood composite floor is good in thermal stability and good in cracking resistance, and almost no high-quality hardwood resource is used.

The invention discloses a prestressed laminated slab as well as a manufacturing method and a using method thereof, and belongs to the technical field of constructional engineering. The prestressed laminated slab comprises a transverse pipeline, a prefabricated concrete bottom plate, reinforcing ribs, longitudinal prestressed tendons and transversely distributed steel bars, the transverse pipelines are arranged at intervals in the first direction, are partially embedded in the prefabricated concrete bottom plate and are parallel to the second direction; longitudinal prestressed tendons and transverse distributed steel bars are arranged in the prefabricated concrete bottom plate. The reinforcing ribs are arranged at intervals in the first direction, and the bottoms of the reinforcing ribs are fixed to the prefabricated concrete bottom plate. The first direction is the length direction of the precast concrete bottom plate, and the second direction is the width direction and is perpendicular to the precast concrete bottom plate. The reinforcing ribs can adopt various structures such as concrete ribs and steel pipe trusses, and light material blocks are arranged on the prefabricated concrete bottom plate and arranged in an area defined by the reinforcing ribs and the transverse pipelines. The manufacturing method comprises the following steps: cleaning a mold table, assembling the mold, distributing the reinforcements, tensioning, fixing the pipeline and the reinforcing ribs, pouring, maintaining and the like. During use, the two-way prestressed floor slab is formed through hoisting, pipeline connection, reinforcement, reinforcement penetrating, pouring, tensioning and grouting. The problems that an existing laminated slab is poor in stress performance, prone to cracking, insufficient in bonding strength and the like are solved, bidirectional prestress design, consistent bidirectional rigidity of a floor system and bidirectional force transmission performance are achieved, the integrality and crack resistance of a floor slab are improved, the self weight is reduced, the steel consumption is reduced, the construction process is simplified, and the laminated slab is suitable for large-span and heavy-load building scenes.

The invention relates to a preparation and construction process of a cast-in-situ solid waste-based UHPC-foamed ceramic composite board, which is characterized in that low-grade potassium feldspar tailings are subjected to acid pickling activation and plasma-assisted microwave treatment, and are combined with high-efficiency compounding of solid waste-based raw materials, so that the matrix activity and the interface bonding force are remarkably improved; a quaternary hybrid toughening system is introduced, so that the mechanical property and the crack resistance durability of the material are comprehensively improved. A green preparation process is adopted for the foamed ceramic, the pore structure is optimized through plasma pretreatment and gradient temperature control sintering, high heat preservation and structural stability are both considered, energy consumption is reduced, and meanwhile the collapse risk of a traditional process is avoided. The interlayer bonding strength and thickness uniformity of the cast-in-place solid waste-based UHPC-foamed ceramic composite board are ensured, and the problems of hollowing, stripping and the like are solved. According to the technical scheme, high-value utilization of solid waste is taken as a core, environmental protection and economical efficiency are achieved, a traditional organic heat preservation system can be replaced, a high-strength, durable and integrated solution is provided for wall heat preservation buildings, and upgrading of the green building material industry is promoted.

The utility model discloses a laminated slab strip reinforcing tool which comprises two laminated slab bodies, an upper reinforcing plate is movably arranged above the two laminated slab bodies, a lower reinforcing plate is arranged below the two laminated slab bodies, and two reinforcing assemblies are arranged between the upper reinforcing plate and the lower reinforcing plate. The reinforcing assembly comprises a rectangular plate, a threaded rod, a connecting rod, a limiting block, an inner threaded cylinder, a PVC pipe, a connecting block and a bearing, the threaded rod is fixedly installed on the lower surface of the upper reinforcing plate, the outer side of the threaded rod is movably sleeved with the PVC pipe, the top end of the PVC pipe is fixedly connected with the lower surface of the upper reinforcing plate, and the top end of the PVC pipe is fixedly connected with the lower surface of the upper reinforcing plate. According to the device, the upper reinforcing plate and the lower reinforcing plate can be conveniently and rapidly reinforced and disassembled through the arranged inner threaded cylinder and the threaded rod, the position of the inner threaded cylinder can be conveniently limited through the arranged bearing, the arranged connecting block and the arranged connecting rod, and the phenomenon that the inner threaded cylinder is lost is effectively avoided.

The utility model discloses a heat preservation decoration composite board and an outer wall heat preservation structure, the heat preservation decoration composite board comprises a special foaming ceramic panel located on the outer side and a heat preservation material layer located on the inner side, and the special foaming ceramic panel and the heat preservation material layer are connected or bonded together in a composite mode; rabbets are formed in the periphery of the special foaming ceramic panel; the special foaming ceramic panel comprises a front layer structure and a rear layer structure and is divided into a front plate and a rear plate, the front plate and the rear plate are the same in shape and size, the front plate and the rear plate are staggered in the up-down direction, the front plate and the rear plate are also staggered in the left-right direction, and a tongue-and-groove is formed. According to the utility model, the problems of easy water seepage and cold and hot bridge generation at the abutted seam between the composite boards are solved; and the board body is easy to damage due to slotting on the composite board. The external corner part and the periphery of the window opening are easy to crack and damage due to water seepage; the volume weight of the thermal insulation panel material is large, and the panel body is easy to fall off.

According to the concrete prefabricated part laying equipment and method, the problems that an existing laying method is long in tower crane occupation time, high in safety risk, low in working efficiency and low in hoisting equipment adaptability are solved. The laying equipment comprises a universal bearing base, a walking hoisting device and a control unit, the top of each connecting plate of a mounting platform of the universal bearing base is connected with a ball assembly, the bottom of each connecting plate is connected with a pushing mechanism, a plurality of steel balls are evenly distributed in a semi-spherical inner groove of a bearing piece, and universal balls are arranged in the inner groove and make contact with the steel balls; a pushing rod of the pushing mechanism penetrates through the connecting plate and abuts against the bearing piece. The method comprises the steps that the universal bearing base is placed on a temporary shelving platform which is laid in advance, the prestressed concrete laminated slab is hoisted and placed above the universal bearing base, a winch of the walking hoisting equipment hoists the prestressed concrete laminated slab and accurately clamps the prestressed concrete laminated slab into a preset position, and the steps are repeated; and sequentially laying the prestressed concrete laminated slabs outside the temporary shelving platform area.

The application discloses a kind of UHPC connection's double post-tensioning prefabricated prestressed concrete frame structure system, including prefabricated concrete upper column, prefabricated concrete lower column, double post-tensioning prefabricated prestressed concrete composite beam, UHPC node core area and composite slab.The upper longitudinal main reinforcement, lower longitudinal main reinforcement, ordinary steel and post-tensioning prestressed tendon are directly anchored in UHPC node core area.The structure system is not only convenient and fast in field construction, improves component installation efficiency, but also can greatly reduce the anchoring length of steel bar, greatly reduce the amount of stirrup in node core area, avoid crowded steel bar in node core area, and reduce the cross-sectional height of component, reduce self weight, improve component crack resistance and self-recovery performance, thereby improve the seismic performance of overall frame structure.Double post-tensioning design can be reasonably designed according to different span, different load, different seismic intensity and other requirements, reduce cost, meet the use requirements.

The present invention discloses a wood veneer wall construction method based on a novel composite board, a composite board, and a preparation method, which belongs to the technical field of wood veneer wall construction. The method comprises the following steps: first, building a skeleton outside a wall, the skeleton being close to the wall, and fixing the skeleton to the wall; second, preparing a wood veneer wall composite board, the wood veneer wall composite board comprising a high-strength aerogel integrated insulation board and a surface wood veneer layer; third, spraying concrete on the wall between the skeletons to form a concrete layer; and fourth, installing the wood veneer wall composite board on the wall, with the side of the wood veneer wall composite board without the surface wood veneer layer being attached to the concrete layer, thereby achieving fixed installation of the wood veneer wall composite board. Through the above-mentioned method, the present invention has the following advantages: (1) safety: good flame retardant effect; (2) energy saving: good thermal insulation effect; (3) comfort: high-efficiency sound insulation can be achieved; (4) health: mildew-proof effect; (5) environmental protection: low carbon and zero formaldehyde.

The invention relates to the technical field of composite boards, and discloses a double-layer solid wood composite floor. Comprising a first formaldehyde-free plywood, an adsorption coating and an anti-virus coating, the surface of the first formaldehyde-free plywood is covered with the adsorption coating and the anti-virus coating, polyurethane glue is adopted at the joints of all the composite boards, and the polyurethane glue is an environment-friendly adhesive which is free of harmful substances such as formaldehyde and benzene and high in strength; the composite stability of all the boards can be effectively improved while no formaldehyde exists, the polyurethane foam board has excellent heat insulation performance, a porous structure in the polyurethane foam board can also provide a certain sound absorption effect, the anti-virus coating is arranged on the first formaldehyde-free plywood, the adsorption coating is arranged on the anti-virus coating, and the anti-virus coating is arranged on the second formaldehyde-free plywood. According to the arrangement, aldehyde substances possibly existing in air can be adsorbed by the adsorption coating, and meanwhile, the anti-virus coating is arranged, so that the aldehyde substances can be prevented from sinking to damage the composite board below the anti-virus coating.

The present application relates to the field of building, specifically to a composite panel-type tie member and a shear performance calculation method; comprising a steel core layer and outer cover layers located on both sides of the steel core layer to clamp and position the steel core layer; the outer cover layers are made of GFRP material, and the sizes of the two outer cover layers correspond; the size of the steel core layer is smaller than that of the outer cover layer, and the steel core layer and the outer cover layer have an equal proportion corresponding relationship; after the centers of the steel core layer and the outer cover layer are aligned, the gap area between the edges of the outer cover layers and the edges of the steel core layer is filled with bonding material. The tie member has high shear strength and stiffness, and effectively reduces the influence of wallboard thermal bridge effect.

The vertical connecting structure comprises a plate body, a protective frame is fixedly connected to one side of the plate body, a waterproof groove is formed in one side of the protective frame, placing frames are fixedly connected to the two sides of the inner wall of the protective frame, a plurality of ventilation openings are formed in the four sides of each placing frame, and the ventilation openings are communicated with the waterproof groove. A drying agent is arranged at the bottom of the inner wall of the placing frame, and the other side of the plate body is fixedly connected with a sealing ring. Through cooperative use of structures such as the protective frame, the waterproof groove, the placing frame, the air vent, the drying agent, the sealing ring, the insertion assembly, the clamping assembly and the bolts, waterproof work can be carried out on the splicing position after the two plate bodies are spliced; and external rainwater and moisture are prevented from permeating into the plate from the splicing seams to cause moisture in the plate, and corrosion of steel bars and cracking of concrete are prevented, so that the durability of the prefabricated concrete laminated plate is improved, and the service life of the whole building is prolonged.

The invention belongs to the technical field of building construction, and discloses a hoisting mechanism for construction of a super-thick prestressed laminated slab, which comprises a main cable and two groups of transverse plates, a group of lifting hook mechanisms are movably mounted on the transverse plates, and the hoisting mechanism further comprises positioning components which are respectively mounted on the opposite sides of the two groups of transverse plates and are used for positioning the distance between the transverse plates and the edge of the prestressed laminated slab. According to the scheme, the transverse plate is placed on the steel truss of the prestressed laminated slab, the baffle is rotated, the piston rod is pulled, and after the side, facing the piston rod, of the baffle makes contact with the edge of the prestressed laminated slab, the lifting hook mechanism is hung on the steel truss; at the moment, an operator only needs to rotate the baffles on the operator downwards and make contact with the edge of the prestressed laminated slab, the group of transverse slabs can be positioned, the group of transverse slabs and the previous group of transverse slabs are placed at the two ends of the transverse slabs in the symmetrical direction, and the situation that in the hoisting process of the prestressed laminated slab, due to the fact that the positions of all hoisting points are asymmetric is avoided.

The utility model relates to a support-free recyclable steel-wood combined truss laminated slab. The laminated slab is composed of a prefabricated slab, in-slab steel bars, a steel-wood combined truss and a laminated layer. The prefabricated plate is located at the bottom, the in-plate steel bars and the steel-wood combined truss are sequentially arranged above the prefabricated plate, and the laminated layer is poured above the prefabricated plate. Lower chords and web members of the steel-wood combined truss are made of steel bars, upper chords are made of battens, and the bottom faces of the battens are higher than the top face of the concrete-poured laminated layer by a certain distance, so that disassembly is convenient. The bending resistance of the steel-wood combined section is utilized, an under-plate support is omitted, the leasing cost of the scaffold is saved, the wood beams can be repeatedly utilized, and remarkable economic and social benefits are achieved.

The utility model relates to the technical field of building construction, in particular to a composite slab cast-in-place slab strip hanging formwork structure. Comprising a T-shaped reinforcing rod, a double-side screw nut in threaded connection with the lower end of the T-shaped reinforcing rod, a vertical screw rod in threaded connection with the double-side screw nut and located below the T-shaped reinforcing rod, an E-shaped clamp arranged on the vertical screw rod in a sliding and sleeving mode in the axial direction, and an anti-disengaging nut in threaded connection with the vertical screw rod and abutting against the lower end face of the E-shaped clamp. The vertical screw rod is sleeved with the middle block in a sliding mode, the abutting blocks are located on the two sides of the middle block respectively and connected to the middle block in a sliding mode in the horizontal direction, and the middle block is provided with an adjusting assembly for adjusting the sliding positions of the abutting blocks. The E-shaped card has the effect of enlarging the use range of the E-shaped card.

This utility model discloses an assembled connection structure for a composite wall and a composite slab, including a locking block and a composite slab. The locking block is disposed on the side of the composite slab, and a slot is provided inside the locking block. A composite wall is disposed on the side of the composite slab, and a slot is provided inside the side of the composite wall. The locking block engages with the slot. An adjustment chamber is provided at one end of the slot, and a pull rod is disposed inside the adjustment chamber. An insert block is fixed to one end of the pull rod, and the insert block engages with the slot. A spring connects the side of the insert block to one end of the inner wall of the adjustment chamber. A clearance chamber is provided at one end of the adjustment chamber, and a slider is disposed in the clearance chamber. A limit block is fixed to one end of the slider, and the limit block is fixedly connected to one end of the pull rod. This utility model is easy to assemble and disassemble, saving manpower.

The utility model discloses a prestressed concrete truss laminated slab which comprises an upper chord member, a plurality of fixing frames are fixed to the lower portion of the upper chord member in the length direction of the upper chord member, and the bottoms of the fixing frames are embedded in a poured concrete bottom plate. The fixing frame comprises an X-shaped cross rod located at the bottom, two web bars composed of bent steel bars or alloy forgings are fixed to the cross rod, the bottoms of the web bars are fixed to two arms of the cross rod, and the tops of the web bars are fixed to the two sides of the lower portion of the upper chord. According to the utility model, the concrete bottom plate can be prevented from being damaged by a gripping device of hoisting equipment, and concrete at the two ends of the concrete bottom plate can be prevented from being broken or deformed when bearing the acting force of prestressed steel bars; and the thickness of the concrete bottom plate can be further reduced.