149 results about "Concrete cover" patented technology

The invention provides a maglev traffic track connecting structure, a maglev traffic track and a construction method of the maglev traffic track. The connecting structure comprises a penetrating type sleeve, a long bolt, an elastic cushion set and a fastening assembly. The penetrating type sleeve penetrates in the thickness direction of the concrete cover plate. The long bolt sequentially penetrates through the track, the penetrating type sleeve and the induction iron core. The elastic pad set comprises a first elastic pad arranged between the top end of the penetrating type sleeve and the induction iron core and a second elastic pad arranged between the bottom end of the penetrating type sleeve and the track. The fastening assembly comprises a nut in threaded fit with the end of the long bolt, and the rail and the induction iron core are fixed to the upper side and the lower side of the concrete cover plate by screwing the nut. The connecting structure is simple and reliable, good in stress condition and convenient to operate and maintain. On one hand, the track is tightly attached to the bottom end face of the concrete cover plate, the stress condition of the long bolts is good, and shear failure is not prone to occurring. And on the other hand, on the basis of realizing adjustable precision, the replacement difficulty and cost of the induction iron core and the track are relatively low.

The invention relates to the technical field of concrete detection, in particular to a concrete protective layer void detection method and system based on a detachable piezoelectric ceramic sensor and an electromechanical impedance resonance technology. The detection method comprises the following steps: temporarily fixing a detachable piezoelectric ceramic sensor on a detection point on the surface of a concrete structure; applying an alternating-current sweep-frequency voltage to excite the piezoelectric ceramic sensor, and obtaining an electromechanical impedance signal frequency spectrum; the electromechanical impedance signal frequency spectrum is analyzed, the frequency of a local defect formant is obtained, and according to the frequency of the local defect formant, geometric parameters of a void area are estimated through a defect size and frequency relation model; and moving the sensor and repeatedly detecting other detection points. The detection method has high efficiency and flexibility, and detection can be realized in any environment; the single-point detection speed is high, the efficiency is high, baseline data is not needed for detection, the anti-interference performance is high, and rapid positioning and quantitative evaluation of void damage can be achieved.

The invention discloses a mountainous area pier durability evaluation method and system based on water-sand composite abrasion, and belongs to the technical field of bridge structure safety evaluation. A composite abrasive particle model considering tangential cutting and normal impact effects is established, discrete solution is performed on the composite abrasive particle model through a smooth particle element solver, and the durability of a pier in a mountainous area is evaluated. Constructing an initial mountainous area pier abrasion rate calculation model; orthogonal test simulation is carried out based on a Box-Behnken design method and a center combination design method, a curve estimation theory and a multivariate nonlinear regression theory are combined, and influences of river water depth, pier pile diameter, flow velocity before water-sand mixed particle impact, sand content, silt particle roundness coefficient and concrete compressive strength on the abrasion rate are considered. Constructing a high-precision bridge pier water-sand abrasion rate calculation model; based on the high-precision bridge pier water-sand abrasion rate calculation model and the bridge site hydrological working condition data, the bridge pier annual abrasion depth is calculated, and whether the bridge pier durability meets the service requirement or not is evaluated based on the concrete protection layer thickness and the bridge pier annual abrasion depth.

The utility model discloses a prefabricated reinforced concrete cover plate device, which relates to the technical field of concrete cover plates and comprises a concrete cover plate main body, splicing components are arranged on the periphery of the concrete cover plate main body, and a plurality of concrete cover plate main bodies can be spliced with one another conveniently. The splicing assembly comprises a transverse concrete connecting plate, a transverse concrete splicing plate, a longitudinal concrete splicing plate and a longitudinal concrete connecting plate, and the transverse concrete connecting plate, the transverse concrete splicing plate, the longitudinal concrete splicing plate and the longitudinal concrete connecting plate are arranged on the periphery of the concrete cover plate body respectively. According to the concrete cover plate, the transverse concrete connecting plates, the transverse concrete splicing plates, the longitudinal concrete splicing plates and the longitudinal concrete connecting plates are fixedly welded to the periphery of the concrete cover plate body respectively, and the pouring splicing plates are inserted into the corresponding inserting grooves; therefore, a plurality of adjacent concrete cover plate main bodies are combined and spliced, and the application range is expanded.

The embodiment of the invention provides a method and device for determining the ultimate bearing capacity of a damaged concrete roof panel and a processor, and belongs to the technical field of structural engineering safety evaluation. The method comprises the steps that at least one damage feature corresponding to a target concrete roof panel after damage is obtained; acquiring the corresponding ultimate bearing capacity and at least one inherent attribute of the target concrete roof panel when the target concrete roof panel is not damaged; substituting at least one damage characteristic corresponding to the target concrete roof panel after damage and the corresponding ultimate bearing capacity and at least one inherent attribute without damage into a corresponding prediction model, and determining the corresponding ultimate bearing capacity of the target concrete roof panel after damage; wherein the damage characteristics comprise the crack width, the crack length, the exposed length of a main rib steel bar and the stripping area of a concrete protection layer; the inherent attribute comprises the plate length.

The utility model discloses a truss type superimposed concrete floor steel support. The truss type superimposed concrete floor steel support comprises a steel bar truss prefabricated concrete slab, a steel beam, a shear-resistant piece, support concrete, support steel bars, floor steel bars and floor post-pouring concrete. Floor slab steel bars are located on the upper portion of the steel bar truss precast concrete slab and covered with floor slab post-pouring concrete. The steel bar truss precast concrete slab comprises precast concrete, a steel wire mesh and a steel bar truss. The steel bar truss comprises longitudinal truss upper iron, longitudinal truss lower bars and truss web bars connecting the longitudinal truss upper iron and the longitudinal truss lower bars. The steel bar truss is fixedly connected with the precast concrete; the steel wire mesh is located below the steel bar truss, and the truss lower bars are partially or completely located in the prefabricated concrete. The support steel bars are connected with the truss upper iron, the steel beams are fixedly connected with the shear-resistant pieces, and the shear-resistant pieces are covered with the support concrete. The utility model has the advantages of small deformation and good connection performance with the steel support, and is convenient for construction.

This invention discloses a method for evaluating the flexural bearing capacity of asymmetric corroded reinforced concrete (RC) columns, comprising: determining the corrosion rate of each steel bar within the cross-section of the corroded RC column; determining the asymmetric corrosion rate of the tension and compression steel bars within the cross-section of the corroded RC column by combining the corrosion rate and the direction of seismic action; determining the mechanical property degradation model of the tension-side corroded steel bars, the compression-side corroded steel bars, and the concrete cover based on the asymmetric corrosion rate and the performance parameters of the steel bars; establishing the equilibrium equation of the control section by combining the direction of seismic action, based on the asymmetric corrosion rate and the mechanical property degradation model; and obtaining the RC column under different axial forces by iteratively solving the equilibrium equation. N u Flexural bearing capacity under M u Thus, the rusted RC column was obtained. N u - M u Correlation curves and the compression-bending capacity envelope of corroded RC columns are presented; the compression-bending capacity performance of corroded RC columns is evaluated based on the compression-bending capacity envelope. This invention can accurately assess the residual capacity of non-uniformly corroded RC columns.

The utility model relates to the technical field of building construction, in particular to a planted roof deformation joint waterproof structure, which comprises a deformation joint and backfill soil arranged on two sides of the deformation joint, and is characterized in that gutters are arranged on two sides of the deformation joint, a retaining wall is arranged on one side, far away from the deformation joint, of each gutter, and the backfill soil is arranged on one side, far away from the deformation joint, of each retaining wall. A filter screen is arranged at the top end of the retaining wall, a plurality of drain holes are formed in the retaining wall, an advanced water stop system is arranged at the top end of the deformation joint, a concrete cover plate is arranged above the advanced water stop system, the concrete cover plate can convey and guide water to a gutter to prevent rainwater from submerging the deformation joint, and the gutter can guide and drain the water to a sewer. The situation that the gutter is full of water and spreads to the deformation joint is avoided, the deformation joint can be sealed through cooperation of a V-shaped aluminum plate and a flexible self-adhesion waterproof roll in the advanced water stop system, waterproof sealing is formed, and rainwater is prevented from permeating into the deformation joint.

This invention provides a method for reinforcing a corroded reinforced concrete column with FRP (fiberglass reinforced plastic) reinforcement-mesh composite structure. The structure includes: a concrete column having a portion to be reinforced and exposed corroded reinforcing steel bars after the concrete cover of the portion to be reinforced has been removed; an FRP reinforcement-mesh composite layer, formed by bonding FRP bars and FRP mesh, wrapped around the outer side of the core area of ​​the concrete column after the concrete cover has been removed, providing longitudinal reinforcement and lateral restraint to strengthen the internal concrete of the portion to be reinforced; several fasteners for securing the FRP reinforcement-mesh composite layer; and ultra-high performance concrete filling both the inner and outer sides of the FRP reinforcement-mesh composite layer, bonding the composite layer to the reinforced concrete column to repair the removed concrete cover and restore the column's cross-section to its original dimensions. This reinforcement structure enhances the strength and deformation capacity of the internal concrete, increases the axial compression, bending, and shear resistance of the corroded reinforced concrete column, and improves the column's durability.

The utility model discloses a concrete cover prefabricated part mould which comprises a mould frame, a bearing rod, a hollow first cylinder piece and a hollow second cylinder piece, the mould frame is provided with a bottom plate part, a mounting hole group and an annular hole arranged around the bottom plate part, the bottom plate part is provided with an open hole, the mounting hole group comprises at least two mounting holes which are sequentially arranged from top to bottom, and the first cylinder piece and the second cylinder piece are arranged on the bearing rod. The bearing rod detachably penetrates through the corresponding mounting hole, the first cylinder part penetrates through the annular hole in a lifting mode, the second cylinder part penetrates through the open hole in a lifting mode, the second cylinder part and the first cylinder part abut against the upper portion of the bearing rod, and a forming cavity is jointly defined by the inner cylinder wall of the first cylinder part, the bottom plate part and the outer cylinder wall of the second cylinder part; the forming cavity is provided with an upward opening, the bearing rod can be moved from one mounting hole to the other mounting hole, the abutting joint positions of the second barrel piece and the bearing rod and the abutting joint positions of the first barrel piece and the bearing rod both ascend or descend, and the depth of the forming cavity is correspondingly increased or decreased.

The utility model provides a die convenient to disassemble and assemble for a concrete cover plate, and relates to the technical field of concrete cover plate dies. The mold convenient to disassemble and assemble and used for the concrete cover plate comprises a mold plate, a movable pipe is connected into the mold plate in a sliding mode, a fixed pipe is connected to the side end of the mold plate, a baffle ring is connected to the side end of the fixed pipe, a connecting ring is connected into the movable pipe, a spring set is connected between the baffle ring and the connecting ring, and a telescopic cylinder is arranged in the fixed pipe. According to the mold convenient to disassemble and assemble and used for the concrete cover plate, the moving pipe is arranged, the one-way vibrator is started to enable the moving pipe to vibrate when concrete is poured after the mold plates are connected, and vibration is transmitted to the concrete to improve the compactness; the telescopic cylinder is started to apply force to the movable pipe during demolding after concrete is solidified, the formwork is separated through counter-acting force, the formwork abrasion is small during demolding, the damage degree is reduced, the service life is prolonged, the replacement frequency is reduced, the construction cost is reduced, the demolding process is simple, the labor cost and complexity are reduced, and the demolding efficiency is improved.

The invention discloses a construction method for building a ship lock mass concrete structure through bridge demolition components, and relates to the technical field of civil engineering. The method comprises the following steps: screening a concrete T beam or a concrete cover beam in bridge demolition as a precast block, carrying out lossless cutting and hoisting to a pretreatment field, and carrying out zoning, grading and directional scabbling treatment on a contact interface of a component and post-poured concrete, so that a friction gradient is formed on the interface, and the component realizes self-stabilization through friction in the early stage of construction. And then the concrete is poured layer by layer, so that deformation coordination of the new and old concrete is realized in the hardening and temperature deformation stages of the concrete to form an integral ship lock structure. According to the construction method, cooperative work of the prefabricated component and mass concrete is achieved through interface behavior regulation and control, the construction process is simplified, the temperature control anti-cracking performance is improved, and the high-valued utilization level of the bridge demolition component in a hydraulic structure is improved. Meanwhile, resource utilization of the construction waste is achieved, and new material consumption and engineering cost are effectively reduced.

This utility model discloses a fiber-reinforced composite concrete protective and airtight cover for underground utility tunnels, relating to the technical field of underground utility tunnel cover plates. It includes a cover plate support with a groove on its upper surface. A concrete cover plate body is placed inside the groove. The concrete cover plate body includes a protective frame, multiple transverse support ribs, multiple longitudinal support ribs, a heat insulation layer, a composite concrete layer, and an electromagnetic shielding layer. Each transverse support rib is horizontally fixedly connected to the inside of the protective frame, and each longitudinal support rib is vertically fixedly connected to the inside of the protective frame. This utility model uses high-strength steel for the protective frame, combined with a crisscrossing steel reinforcement skeleton (transverse and longitudinal support ribs), and then welds it to form a rigid frame. This effectively disperses the load generated by vehicle traffic or pedestrian trampling, preventing stress concentration that could lead to concrete cracking.

This utility model belongs to the field of bridge pier safety protection and discloses a reinforcement device for bridge piers to resist erosion. It includes a permeable protective barrel, which is fitted around the bridge pier to form an annular cavity. The cavity is filled with a filler material tightly adhering to the outer wall of the bridge pier. The top of the permeable protective barrel is sealed with a concrete cover. The protective barrel is composed of multiple vertically spliced ​​prefabricated sections, each with multiple circumferential openings on its sidewalls. These openings allow water flow to partially penetrate rather than directly impact the bridge pier, effectively dispersing water energy and slowing down the downstream water flow velocity, thereby inhibiting sediment initiation and localized erosion. The filler material fits tightly against the bridge pier, providing lateral support and reinforcement, enhancing the overall stability of the bridge pier. The concrete cover and prefabricated section structure ensure the device's airtightness and modular convenience, facilitating construction, installation, and subsequent maintenance. This device can simultaneously achieve the dual goals of erosion prevention and bridge pier reinforcement, significantly improving the durability and safety performance of the bridge pier and avoiding the limitations of existing technologies with only single functions.

This utility model discloses a device for reinforcing concrete cover with a mesh, comprising a rebar connector, a fixed base, and two sets of adjusting rods. One end of each adjusting rod is symmetrically mounted on the rebar connector, and the other end is connected to the fixed base. The rebar connector is mounted on a rebar cage, and the fixed base is located within the surface of the concrete cover. In use, the adjusting rods can be adjusted in length according to the concrete cover, and the mesh fabric is mounted on the surface of the concrete cover via the fixed base. This structure can improve the peel resistance of the mesh fabric on the concrete cover, enhance the crack resistance of the concrete cover, and improve the integrity of the rebar cage and the concrete cover, as well as the quality of the reinforced concrete structure.

The utility model discloses a reinforced protection layer thickness multi-point caliper relates to building construction detection tool field. It includes long strip board body shape main ruler body, movable ruler subassembly and angle measurement subassembly, and the main ruler body front surface is equipped with 0 40mm range 1mm graduation main scale and has been opened and has gone through the slot, and movable ruler subassembly contains first movable ruler and second movable ruler, and first movable ruler has 0 20mm range 1mm graduation first auxiliary scale and one end is the sharp head structure, and one end of second movable ruler is V-shaped fork structure, and both are through bolt nut combination and are fixed with the main ruler body sliding connection and have gone through the slot, and angle measurement subassembly is located at the main ruler body back, and contains the sector dial with 0 180 DEG scale and rotatable pointer. The main ruler body, first movable ruler, second movable ruler adopt stainless steel material. The caliper can accurately measure the reinforced protection layer thickness and angle, and the operation is convenient, and the durability is strong, can satisfy the building construction detection demand.

The invention relates to the technical field of bridge construction, in particular to a prefabricated block type concrete cover beam which is used for connection of a pier column and a bridge floor and comprises an upper cast-in-place component and a lower prefabricated assembly component, and the lower prefabricated assembly component comprises a column cap prefabricated block and a cantilever type prefabricated block. A tenon is arranged on the top of the column cap prefabricated block, a groove is formed in the bottom of the middle of the cantilever type prefabricated block, and the tenon and the groove are connected in an engaged mode through a fixing piece. The method is used for solving the problems that a cast-in-place cover beam is long in construction period, a prefabricated cover beam is difficult to transport and hoist, and the construction purposes of light weight, convenient construction and reasonable stress are difficult to achieve. Through the modular block design formed by the upper cast-in-place components and the lower prefabricated assembly components, the advantages of light weight and efficient construction are achieved; the through cover beam keeps section type stress balance between the bridge floor and the pier column; the tenons and the grooves are connected in an engaged mode to form a continuously-stressed combined section, and the strength and the shear resistance of the component are enhanced.

The utility model discloses a rolling device for covering a curing film after concrete pouring construction, which comprises a curing film covering device base A. A curing film covering device base B is arranged on one side of the curing film covering device base A. A connecting plate A is fixedly arranged on the surface, facing the curing film covering device base B, of the curing film covering device base A. A connecting plate B is fixedly arranged on the face, facing the curing film covering device base A, of the curing film covering device base B. A lengthening plate is arranged between the curing film covering device base B and the connecting plate B. The front end face of the connecting plate B and the front end face of the lengthening plate are each fixedly provided with a strip-shaped fixing head. The rear end face of the connecting plate A and the rear end face of the lengthening plate are each provided with a strip-shaped fixing groove. By means of the concrete film covering device, a worker can conduct film covering operation on concrete without stepping into the concrete, the worker does not need to conduct extra smoothing operation on the concrete in the later period, and therefore the convenience of the concrete film covering operation is improved.

The invention relates to an inclined shaft tunnel opening type tunnel portal excavation arrangement structure and a construction method.The arrangement structure comprises an upward slope and a rigid built-in soil retaining structure, the upward slope is arranged at an inclined shaft tunnel opening in the axis direction of the tunnel, and tunnel portal wall excavation embedded steps are formed in the range of covering layer side slopes on the two sides of the inclined shaft tunnel opening in a step-by-step excavation mode; a tunnel door wall bottom cushion layer is arranged at the bottom of the wall excavation embedded step, a step type tunnel door wall is poured on the tunnel door wall bottom cushion layer, the step type tunnel door wall is embedded into the upward slope, and a rigid embedded soil retaining structure is formed; a concrete cover arch is arranged at the top of an inclined shaft opening, the concrete cover arch extends inwards and is in transition connection with an inclined shaft open cut tunnel lining, a steel arch frame is arranged between the concrete cover arch and the inclined shaft open cut tunnel lining, and the whole structure is closed through longitudinal connecting ribs of the steel arch frame. Compared with a common bamboo cutting type tunnel portal and a wing wall type tunnel portal, the tunnel portal walls of the notch type tunnel portal are embedded into the covering layer slopes on the two sides, and the soil retaining capacity of the covering layer tunnel portal walls and the stability of the slope entering the tunnel portal are effectively improved.

The invention discloses a house quality safety detection method and system based on data analysis, and relates to the technical field of house structure monitoring. According to the system, durability data such as the thickness, strength and compactness of a concrete wrapping layer are collected in real time through a steel bar scanner, a rebound apparatus and an ultrasonic detector; after pretreatment, calculating a deformation trend index npt of a protective layer to carry out concrete wrapping layer degradation evaluation, and judging whether the wrapping layer is degraded or not; if the concrete wrapping layer is assessed to be degraded, further acquiring reinforcing steel bar performance data and environmental response data through acquisition equipment and a sensor group, and preprocessing the reinforcing steel bar performance data and the environmental response data to calculate a corrosion electric signal diffusion index ced and an environmental erosion interference index etf; and integrating the three indexes to obtain a comprehensive coupling aging risk index rdi to perform house performance risk assessment, completing house performance risk level assessment, generating a corresponding decision instruction according to the risk level, and realizing dynamic monitoring, early warning and intervention of the house structural degradation risk.

The invention discloses a reinforcing mesh and shear nail combined three-dimensional system applied to building terrace and bridge deck pavement, which comprises a reinforcing mesh and a shear nail component, the shear nail component comprises a shear nail cap, a shear nail body and a shear nail connecting piece, the reinforcing meshes vertically cross and penetrate through the side holes of the shear nail connecting pieces to be fixedly connected with the shear nail components; the shear nail components are divided into an integral type and an assembled type, the integral type shear nail components and the reinforcing meshes are welded and fixed through the shear nail connecting pieces to form a standardized three-dimensional unit module, module hoisting and module connection are rapidly carried out, the shear nail connecting pieces replace binding construction at the positions of reinforcing steel bar intersection points, and the construction efficiency is improved. And spacing and positions of the steel bars are controlled. The thickness of the concrete protection layer is accurately controlled, the reinforcing mesh is supported and positioned, the cracking risk is effectively reduced, and the wear resistance, pressure resistance, fatigue resistance and impact resistance of building terraces and bridge deck pavement are improved.

The application discloses a kind of bank protection reinforcement methods using prefabricated cover plate underwater pressure grouting, it is related to bank protection reinforcement technical field.The method includes the following steps: adding sheet pile outside original bank protection bottom plate;Prefabricated concrete cover plate with pressure grouting hole and pre-buried grouting sleeve;High-elastic rubber pad with opening is added at the bottom of cover plate;Install lifting frame and make its top expose above normal water level;Cover plate is hoisted to the above sheet pile and original bank protection bottom plate, utilize the compression deformation sealing underwater grouting area to be injected of cover plate dead weight and rubber pad, form local closed space;Finally, through the guide of lifting frame, grouting pipe is inserted into pre-buried sleeve from above water surface and carries out underwater pressure grouting.The application is combined by cover plate, rubber pad and grouting sleeve, effectively isolates water flow scouring, maintains stable grouting pressure, adapts to construction error, realizes accurate grouting, converts underwater key operation into water construction, greatly improves construction convenience and safety.

The utility model provides a detachable concrete cover plate hoisting structure which comprises a plurality of sleeves pre-buried in a concrete cover plate, a cover sealing assembly or a hoisting assembly is detachably connected in the sleeves, the hoisting assembly comprises a connecting rod and a lasso, one end of the connecting rod is detachably connected with the sleeves, the other end of the connecting rod is fixedly connected with the lasso, and the lasso is fixedly connected with the cover sealing assembly or the hoisting assembly. The lifting requirement of the cover plate is met, the cover sealing assembly can be arranged without dismounting the lifting assembly during lifting, traveling vehicles or pedestrians can conveniently go on the cover plate, and meanwhile the risk that the lifting assembly is artificially damaged is avoided.

The invention relates to the technical field of building materials, in particular to a solid-waste-based light high-toughness concrete cover plate and a preparation method thereof.Fly ash microbeads, red mud, volcanic rock powder and carbide slag are matched to serve as a cementing material, red brick particle coarse aggregate serves as aggregate, and a flexibilizer is added, so that the toughness of the cover plate is improved while the water permeability is reduced; and a water reducing agent and redispersible latex powder are added as auxiliaries, so that a high-added-value building material product with high breaking strength, moderate compressive strength, high water permeation speed, high solid waste utilization rate and good environmental benefits is prepared.

The utility model discloses a composite geomembrane joint structure at a joint part of an anti-seepage wall. An upper anti-seepage structure is poured and solidified above the anti-seepage wall and comprises a concrete cap, plastic concrete and a composite geomembrane; the plastic concrete is located in a groove formed in the middle of the top face of the diaphragm wall, the concrete cap is located above the plastic concrete and the diaphragm wall, and the geomembrane penetrates from the middle of the top face of the concrete cap to the middle of the bottom face of the plastic concrete and is consolidated. The upper anti-seepage structure is provided with a plurality of geomembrane seam structures at intervals in the longitudinal direction of the concrete anti-seepage wall, and the geomembrane seam structures comprise connector seams formed in the longitudinal direction of the anti-seepage wall of a concrete cover cap at intervals, geomembranes are in a folded state in the connector seams, and foam plates are embedded into the two ends of the connector seams. And a water stop plate is longitudinally embedded between the geomembrane and the concrete cap along the downstream side of the river. The foam board, the water stop board, the connecting rod, the gravel and other structures are added to the pouring type connector, the joint of the geomembrane is prevented from being damaged, and the connection problem of the adjacent concrete caps is solved.

A kind of sliding formwork steel bar spacing and concrete cover thickness control device, belong to the technical field of water conservancy and hydropower engineering construction, including positioning angle steel, the positioning angle steel is fixedly connected on jack crossbeam, several positioning blocks evenly arranged are connected on the positioning angle steel along its length direction, positioning hole is opened in the positioning block, the hole wall of the positioning hole is recessed to form recess, several ball bearings are arranged in the recess along its circumferential direction.The positioning angle steel and the positioning hole in the utility model are arranged to accurately control the steel bar spacing and the concrete cover thickness, at the same time, the setting of ball bearing also avoids the steel bar that is inserted into positioning hole from being jammed, to ensure that the quality of sliding formwork construction concrete meets the design standard.

The invention discloses a steel-concrete structure building fold line curtain wall fixing structure and a construction method thereof. The steel-concrete structure building fold line curtain wall fixing structure comprises a steel beam, a steel square box, a plurality of anchor bars, a bracket, a concave point adapter, a curtain wall convex point stand column, a curtain wall concave point stand column, a floor bearing plate and concrete. The anchor bars are connected to the steel square box. The bracket is connected to the steel square box and the steel beam and located on the side, away from the anchor bar, of the steel beam. The concave point adapter is connected to the steel beam, and the extension length of the concave point adapter is smaller than that of the bracket in the direction perpendicular to the steel beam. The curtain wall convex point stand column is connected to the end of the bracket, the curtain wall concave point stand column is connected to the concave point adapter, and the floor support plate is located on the side, provided with the anchor bars, of the steel beam. The concrete is poured on the floor support plate, covers the anchor bars and is fixedly connected with the steel square box. In the invention, the structures such as the steel beam, the steel square box, the anchor bar, the bracket and the concave point adapter can be assembled and formed in a factory in advance, so that the assembly precision is improved, the operation complexity of site construction is reduced, and the assembly efficiency is obviously improved.

The utility model provides a double-wall sandwich insulation board and a forming system thereof, and belongs to the field of insulation laminated wallboards, the double-wall sandwich insulation board structurally comprises a supporting keel, an insulation board, a structural net and a concrete covering layer, the supporting keel is at least provided with two rows of through holes and two rows of positioning pieces, and the positioning pieces serve as positioning installation pieces of the insulation board on one hand and serve as positioning installation pieces of the insulation board on the other hand; on the other hand, the positioning pieces are used as tying pieces of the concrete covering layers on the two sides, and the wall bodies on the two sides are tied to form an integrated double-wall structure through the bolting effect of the positioning pieces and the concrete covering layers on the two sides and the cooperation of the supporting keels; the through holes facilitate the installation of the structural net and can also be used as through connecting ports for supporting the concrete covering layers on the two sides of the keel; according to the scheme, structural net mounting pieces such as wires and mounting nails are not needed, and the strength of the whole plate is higher through cooperation of the supporting keels and the concrete covering layer.

This invention provides a dynamic intelligent temperature control device for large-volume concrete and its usage method, belonging to the field of dynamic intelligent temperature control technology for concrete. It includes a base plate with a water distribution plate installed on one side. The water distribution plate has an outer ring pump connection hole and an inner ring pump connection hole sequentially opened from top to bottom. This invention uses an outer ring wireless flow regulating valve and an inner ring wireless flow regulating valve. When the concrete covers the cooling water pipe, the outer and inner ring wireless flow regulating valves begin to flow water, and the wireless flow meter starts counting the flow rate and simultaneously sends the information to a data relay station. During the concrete cooling stage, the cooling water flow rate changes accordingly according to the cooling rate until it automatically shuts off. Wireless temperature sensors and wireless temperature and humidity sensors are placed at the locations where measurements are needed to collect on-site data. When the equipment is not in use, the wireless temperature sensors and wireless temperature and humidity sensors can be pre-charged using an internally installed battery.

The invention relates to the technical field of bridge floor construction equipment, in particular to a bridge floor concrete film covering robot with an automatic film covering and hot melting cutting mechanism, which comprises a moving trolley and a film covering device arranged on the rear side of the moving trolley, the film covering device comprises a pair of connecting parts, a driving part arranged in the connecting parts, placing parts driven by the driving part, a connecting rod and a protective film arranged between the pair of placing parts, and cutting parts arranged on the outer sides of the connecting parts. According to the bridge floor concrete film covering robot with the automatic film covering and hot melting cutting mechanism, a square plate is driven by an electric push rod to drive a square frame to move, a rack is meshed with end teeth, a support is lifted and turned over, a protective film is lifted up from the surface of concrete, meanwhile, rotation of the end teeth is meshed with shaft teeth, and a convex shaft is driven to drive a long rod and a hot melting cutter at the end to turn over downwards; and hot melting cutting of the lifted part of the film body is completed, and the integrated operation of automatic lifting and synchronous precise cutting of the protective film in the angle adjusting process of the moving trolley is achieved.