464 results about "Composite slab" patented technology

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 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 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 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 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 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 belongs to the technical field of RH refining furnace masonry structures, and particularly discloses an RH refining furnace upper groove masonry structure which is characterized in that a pouring layer prepared in a pouring mode is arranged in a furnace shell, a plurality of anchoring parts are evenly distributed in the pouring layer, one end of each anchoring part is connected with the inner wall of the furnace shell in a welded mode, and the other end of each anchoring part is connected with the outer wall of the furnace shell in a welded mode. The nanometer composite board is further arranged between the inner wall of the furnace shell and the pouring layer, the heat conductivity coefficient of the nanometer composite board is extremely small, the heat preservation effect is good, due to the fact that the whole furnace wall adopts the pouring layer formed through pouring, the overall effect is good, the possibility of brick structure through joints is greatly reduced, the risk that steel penetrates through the furnace wall is reduced, and the service life of the upper groove is prolonged. And the masonry workload is greatly reduced, the labor intensity of workers is relieved, the construction period of masonry maintenance of the upper groove is shortened, and therefore the operation efficiency of the RH refining furnace is improved, meanwhile, compared with a brick structure, the refractory material cost is saved, and the cost can be greatly reduced.

The utility model relates to the field of prestressed ribbed laminated slab, concretely provides a kind of prestressed concrete ribbed laminated slab, including splicing subassembly and hoisting subassembly, the hoisting subassembly is installed on splicing subassembly, the splicing subassembly includes laminated slab body, and the inside of laminated slab body is equipped with multiple groups of connecting tendon, the left side surface of connecting tendon is fixed with connecting block one, and the side surface of connecting block one is fixed with multiple groups of trapezoidal block one.The utility model is positioned splicing between laminated slab body by setting the trapezoidal block one and trapezoidal block two of mutual adaptation, the through-hole formed on its surface forms longitudinal through channel, so that building reinforcement can be sequentially arranged in the through-hole of adjacent laminated slab, directly strengthen the overall bearing capacity between trapezoidal block, indirectly improve the structural stability of laminated slab combination, and the corner block fixed on the surface of connecting block one and connecting block two is automatically attached to the corner area of laminated slab body with assembly action, to form physical protection barrier.

The utility model discloses a heat preservation type composite board, and aims to provide a heat preservation type composite board which has the advantages that the structural connection strength is improved, the assembly is convenient, and the heat preservation performance is enhanced. The device comprises an anti-deformation bracket, the anti-deformation support is provided with a packing groove, and the heat preservation packing block is connected with the packing groove in an embedded mode. The panels are arranged on the two sides of the anti-deformation support, and the panels are connected with the anti-deformation support; the bonding plate is arranged between the panel and the anti-deformation support, and the panel and the heat preservation filler block are connected through the bonding plate; the anti-deformation support is arranged in the fixing frame, and the bonding plate is connected with the fixing frame in a clamped mode; the locking assembly is arranged on the fixing frame, and the panel is connected with the locking assembly; and the butt joint assembly is arranged on the fixed frame and is connected with the fixed frame. The composite board has the advantages that the composite board is convenient to assemble, the structural connection strength and integrity are enhanced, and the heat preservation performance of the composite board is improved; structural connection stability is improved, maintenance is facilitated, and resources are saved; the connection is convenient and fast; and the assembly efficiency and strength are improved.

The invention provides an adjustable laminated slab hoisting device. The adjustable laminated slab hoisting device comprises a hoisting bracket, a transverse frame, a horizontal driving assembly and a hoisting sling, the hoisting support comprises a bottom frame and a lifting assembly arranged on the bottom frame. The transverse frame is horizontally arranged at the top of the lifting assembly, the horizontal driving assembly is arranged at the top of the transverse frame, the hoisting tool is connected with the output end of the horizontal driving assembly through the connecting assembly, and the connecting assembly is slidably connected with the transverse frame; the hoisting tool comprises a mounting box and four driving boxes arranged on the mounting box, and a sling is hung on each driving box; a driving device is arranged in each driving box, and the driving devices are used for controlling winding and unwinding of the corresponding slings; two connecting rods are arranged among the four slings in a staggered mode, and the two ends of each connecting rod are hinged to the corresponding slings respectively; and a horizontal detector is arranged at the top of each connecting rod, so that the problem that in the prior art, when a laminated slab is hoisted, the laminated slab is inconvenient to level is solved.

1. Name of the product in this design: Ribbed planar steel truss prestressed concrete composite slab. 2. Purpose of this design: For use in building structures. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a UHPC connected post-tensioned non-bonded co-tension prefabricated prestressed concrete frame structure system, which comprises a prefabricated concrete upper column, a prefabricated concrete lower column, a post-tensioned non-bonded co-tension prefabricated prestressed concrete composite beam, a UHPC node core area and a composite slab. The structure system is not only convenient and fast in on-site construction and improves the component installation efficiency, but also can greatly reduce the steel bar anchoring length, greatly reduce the amount of stirrups in the node core area, avoid the congestion of the steel bars in the node core area, reduce the component section height, reduce the self weight, improve the component crack resistance and self-recovery performance, thereby improving the seismic performance of the overall frame structure. The pre-tensioned prestressed steel bars can make the prefabricated beam less supported or free of support during construction, thereby reducing the construction cost, and the post-tensioned non-bonding can enhance the integrity of the frame, so that the structure has a certain self-resetting capacity and structural toughness in the earthquake, and the post-earthquake repair cost is reduced.

The utility model relates to the field of house materials, in particular to a foam scrap processing device for producing a color steel foam composite board, which comprises a conveying device and portal frames, the conveying device is positioned between the portal frames, a movable cross beam is mounted between the portal frames, and a lifting mechanism is mounted on the movable cross beam and used for lifting the movable cross beam. According to the foam scrap treatment device for production of the color steel foam composite board, the brush bristles which can automatically sweep and are made of anti-static materials are installed, foam on the color steel foam composite board can be effectively and continuously cleaned, and the working efficiency is improved; and meanwhile, an air draft mechanism is installed, foam can be effectively and further sucked into a dust collection bag to be collected and treated, the height of bristles can be adjusted by installing a lifting mechanism, and the practicability of the foam scrap treatment device for production of the color steel foam composite board is further improved.

This utility model relates to the field of composite slab technology and discloses a temporary support structure for composite slabs, including two first support arms. A second support arm is slidably connected to the top of each of the two first support arms. A top plate is provided on the top of each of the two second support arms. A lifting mechanism for raising and lowering the top plate is provided on the top of each of the two second support arms. Two sliding grooves are symmetrically formed on the surface of each of the two first support arms. The same sliding ring is fixedly connected to the surface of each of the two connecting rods on the side away from the second support arm, and the sliding ring is slidably connected to the surface of the first support arm. A fixing ring is fixedly connected to the top of each of the two first support arms, and a connecting mechanism for connecting the sliding ring is provided on one side of each fixing ring. A second fixing hole is formed on the surface of each of the two second support arms on the side away from the top plate, and a support mechanism for supporting the second support arm is provided inside each of the two second fixing holes. This utility model, through the provision of second support arms, avoids on-site assembly of components.

The application discloses a kind of preparation and stacking method of steel rib prestressed concrete composite slab, belong to the field of prefabricated building, the present application is provided with support block on steel rib, support block includes concrete block, upper support leg and lower support leg are embedded in concrete block, upper support leg and lower support leg are respectively cast in concrete upper flange and prestressed concrete bottom plate, and the top end surface of upper support leg and the bottom end surface of lower support leg are flush with the top surface of concrete upper flange and the bottom surface of prestressed concrete bottom plate respectively.The support block provided by the present application has the effect of limiting the position of steel rib, preventing the inclination deformation of steel rib and the upper flange of concrete, and can also be used as a stacking support device for steel rib prestressed concrete composite slab.The present application has high production efficiency, simple structure, convenient installation and positioning, can effectively limit the displacement of steel rib, improve the stability of steel rib, prevent the inclination deformation of steel rib and the upper flange of concrete, optimize the stress of stacking, and is safe and reliable for stacking, to prevent the concrete from being crushed.

The invention belongs to the technical field of tunnel engineering and intelligent temperature control, and particularly relates to a cold region tunnel temperature dynamic regulation and control device which comprises a partition light-transmitting heat preservation structure connected to the inlet end of a tunnel and a full-tunnel dynamic keel structure in the tunnel. Heat absorption and heat preservation of the light-transmitting heat preservation room are achieved through composite boards, an intelligent air curtain forms an air curtain barrier at a port, and a heat preservation blanket folding and unfolding system dynamically adjusts the covering state. The keel supporting mechanism drives the insulation board to adjust the thickness of the air layer through the telescopic unit, and the sealing performance is ensured through the flexible material. The device monitors environmental parameters in real time through a sensor, cooperatively regulates and controls the working state of each component, overcomes the defects of high energy consumption and poor adaptability to extreme working conditions of a traditional fixed heat preservation mode, and realizes the unification of stable control of tunnel temperature and improvement of energy efficiency.

This invention belongs to the field of building materials technology, specifically disclosing a sound-absorbing porous foamed concrete composite board and its preparation method. Using foamed concrete as the substrate of the composite board effectively solves the problem of poor environmental performance of traditional sound insulation materials. Compared with materials such as polystyrene and sound-absorbing rock wool, it does not require a large amount of energy for preparation and can utilize recycled raw materials. It does not produce toxic powder after aging, reducing harm to the air environment and human health, while also avoiding the flammability hazards of traditional materials. The closed-cell sound insulation layer's sealed pores can block direct sound wave penetration, achieving basic sound insulation. The sound-absorbing pores of the porous sound-absorbing layer, combined with the interconnected channels, introduce incident sound waves into the interior. Energy is dissipated through reflection and friction within the channels, forming a dual protection of "sound absorption and sound insulation." This solves the core problem of poor sound insulation performance of traditional concrete and compensates for the short lifespan of traditional sound insulation materials, extending the overall service life of the board.