200 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 relates to the technical field of heat preservation curtain wall pre-embedded assemblies, and discloses a heat preservation curtain wall pre-embedded assembly and a curtain wall installation method.The heat preservation curtain wall pre-embedded assembly comprises a pre-embedded part, the pre-embedded part is provided with a placement groove, a protective cover is detachably installed in the placement groove, and an inner cavity and an installation cavity are defined by the protective cover and the pre-embedded part; a driving part and a puncturing part are mounted in the mounting cavity, and the driving part is in driving connection with the puncturing part. According to the heat preservation curtain wall pre-embedded assembly and the installation method thereof, high-pressure gas is inflated into the inflation pipe, the barbed nails can be driven to stretch out of the through holes and pierce the concrete covering layer, then the protective cover is taken down, the welding plate can be exposed, the whole process is convenient and rapid, the construction efficiency is improved, and the construction cost is reduced. And the protective cover can protect the first welding mark on the welding plate from being polluted, the welding plate does not need to be cleaned, the construction efficiency is further improved, the taken-down protective cover can be repeatedly used, and the construction cost is reduced.

The utility model relates to the technical field of bridge construction, in particular to an anchoring device for pre-tensioning method prestress tensioning of a steel box concrete cover beam, which comprises an inner side tensioning anchor plate and an outer side tensioning anchor plate, the inner side tensioning anchor plate is connected to a prestress anchoring area of the cover beam, and the outer side tensioning anchor plate is connected to a steel box concrete cover beam. The outer side tensioning anchor plate is arranged on the face, opposite to the bent cap, of the inner side tensioning anchor plate, the inner side tensioning anchor plate and the outer side tensioning anchor plate are correspondingly provided with a plurality of through holes, the through holes are distributed in a rectangular array mode, and a supporting piece is arranged between the inner side tensioning anchor plate and the outer side tensioning anchor plate. According to the tensioning and anchoring device, the problems that in the prior art, a pre-tensioning method prestressing tendon is anchored through a fixed pedestal or a steel die, an anchoring device is large in occupied area and needs to be integrally transported to a construction site after being tensioned and released in a designated site, and the operation process is tedious are solved.

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.

The super high-rise concrete covering and curing structure comprises a main frame, a top frame and lifting equipment, the lifting equipment is assembled between the top frame and the main frame, electromagnet sets are assembled on the two sides of the upper end of the main frame through bolts, an upper section curing curtain is assembled at the upper end of the exterior of the main frame, and a lower section curing curtain is assembled at the lower end of the exterior of the main frame. A lower section maintenance curtain is assembled at the lower end of the outer portion of the main frame, a protection plate is assembled at the upper end of an inner cavity of the main frame, electric rolling wheels are evenly distributed at the bottom of the main frame, each electric rolling wheel comprises a motor, and the output end of each motor is fixedly connected with a rolling wheel body. According to the super high-rise concrete covering and curing structure, the overall safety performance of the device is greatly improved, proper temperature and humidity conditions are built in the internal environment, then the cement hardening reaction is accelerated, meanwhile, the waiting period can be shortened, water source waste caused when a wall is sprayed is avoided, water resources are saved, and the structure is environmentally friendly; and the wall wetting effect and quality are improved.

The invention relates to the technical field of building construction, in particular to a concrete cover beam maintenance construction method which comprises the following steps: prefabricating a maintenance main pipe, a transverse maintenance branch pipe and a vertical maintenance branch pipe; maintenance main pipes are placed along the longitudinal axis of the top face of the bent cap, and adjacent maintenance main pipes are sequentially connected through four-way pipe joints. A transverse maintenance branch pipe is mounted at the four-way pipe joint, and a spray head is mounted at the end of the transverse maintenance branch pipe; the vertical maintenance branch pipe is connected to the maintenance main pipe, and the top of the vertical maintenance branch pipe is provided with a spraying head; a pump is arranged at the water source and is connected with a water supply pipe which is connected with the maintenance main pipe; the pump is electrically connected with the controller, and the controller comprises a timing circuit; the pump is started, the time needed for spraying and wetting the whole cover beam is determined and is increased by 3-5 min, and the increased time is the one-time maintenance spraying time; the time from wetting to drying of the bent cap is determined as the maintenance interval time; and a controller is arranged according to the one-time maintenance spraying time and the maintenance interval time, and spraying maintenance is automatically conducted on the bent cap. The capping beam maintenance quality is ensured.

The utility model belongs to the technical field of cover plate paving, and particularly relates to concrete cover plate paving equipment which comprises a mounting frame, a plurality of moving assemblies are arranged at the bottom end of the outer side of the mounting frame, first sliding grooves which are opposite front and back are formed in the upper end of the inner side wall of the mounting frame, and second sliding grooves which are opposite front and back are formed in the middle end of the inner side wall of the mounting frame. Second sliding blocks which are opposite left and right are slidably connected to the inner sides of the first sliding grooves, connecting rods are fixedly connected to the inner sides of the second sliding blocks, and transmission rods are rotatably connected to the right ends of the inner sides of the connecting rods. According to the concrete cover plate paving equipment, the function of automatic paving can be achieved through mutual matching of multiple sets of mechanical structures, automatic equipment can rapidly and accurately complete positioning, installation and compaction of a cover plate, and the construction speed and efficiency are greatly improved. Compared with manual operation, the automatic equipment is not limited by working time and influenced by fatigue of personnel, and can continuously work and keep high efficiency.

The invention relates to the technical field of building material production, in particular to a forming device special for concrete cover plate production, which comprises a demoulding frame, the upper surface of the demoulding frame is rotatably connected with a rotating frame, the inner sides of the two ends of the rotating frame are provided with sliding chutes, and the upper surface of the demoulding frame is symmetrically and fixedly connected with double-shaft motors; the output shafts on the sides, close to each other, of the double-shaft motors are fixedly connected to the two ends of one side of the rotating frame, when the double-shaft motors drive the rotating frame to turn over, the rotating frame can automatically turn over the cover plate mold, manual intervention can be reduced, the demolding efficiency can be greatly improved, the force for driving the mold to turn over automatically is consistent, and the demolding efficiency is improved. And the external force borne in each demolding process is more uniform, so that the cover plate can be stably separated from the interior of the mold, and the integrity of the appearance of the cover plate can be kept.

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 provides a structure in which an outdoor direct buried pipe is arranged in the gap of the corridor foundation, which enables the air-conditioning water supply and return pipes to be laid reliably and stably, ensuring the stable and reliable operation of the central air-conditioning. Structural columns are arranged on both sides of the width of the corridor, and a foundation pedestal is arranged at the bottom of the corridor, characterized in that it includes: a return pipe assembly, which includes a return pipe and a first insulation layer; a water supply pipe assembly, which includes a water supply pipe and a second insulation layer; a concrete cover plate; a yellow sand layer; and a backfill soil layer; two groups of structural columns arranged at intervals are arranged on the upper part of the foundation pedestal, and the two groups of structural columns and the upper surface of the foundation pedestal are combined to form a pipe placing space, the bottom layer of the pipe placing space is a yellow sand layer, and the return pipe assembly and the water supply pipe assembly are arranged in parallel in the middle of the thickness direction of the yellow sand layer, and the upper surface of the yellow sand layer is covered with the concrete cover plate, and the upper surface of the concrete cover plate is the backfill soil layer, and the backfill soil layer is compacted.

The utility model discloses a modularized maintenance-free elevator shaft protection mechanism, relates to the technical field of elevator shafts, and solves the technical problems that in the conventional elevator shaft construction protection, various guardrails are additionally arranged at an elevator shaft opening to form a circle, and various alarming and anti-falling parts need to be arranged, so that the disassembly and assembly operation procedures are more, and the use is not convenient enough. Comprising an elevator shaft, and a square hole is formed in the elevator shaft; the auxiliary building frame is arranged in the square hole, and a trapezoidal mounting notch is formed in the auxiliary building frame; the concrete cover plate is arranged in the square hole, the bottom surface of the concrete cover plate protrudes downwards, and the concrete cover plate and the trapezoidal installation notch are installed in a matched mode; the concrete cover plate is lapped on the auxiliary lapping frame, the positioning columns are sleeved with the penetrating grooves in the four corners, then the nuts are screwed, the concrete cover plate is installed in each square hole, an elevator shaft opening can be blocked in the construction process, personnel or objects are effectively prevented from falling into the hole accidentally, walking is convenient, and the concrete cover plate can be rapidly dismantled when an elevator is installed.

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 present invention discloses a concrete structure hydraulic pump station of a hydraulic engineering facility, which mainly includes a lifting beam and guide rails, an electric hoist, and a floor layer in a machine room. A vertical straight groove is opened on the wall of the machine room, the upper end of which reaches the ring beam directly, and the lower end is connected to the doorway. The lifting beam and the guide rail extend to the outside of the machine room through the vertical straight groove. A driving motor output shaft hole and an axial flow pump hole are opened on the floor layer, and another horizontal straight groove connects the two holes. The present invention can lift the driving motor and the axial flow pump to the outside of the machine room at one time for direct loading, and vice versa. At the same time, the concrete cover plate of the original driving motor installation position is cancelled, creating conditions for the accurate positioning of the driving motor.

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 invention relates to the field of concrete cover plate production, and discloses an energy-saving filling forming device for concrete cover plate production, which comprises a forming mechanism and a mold, the forming mechanism comprises a rack, the rack is provided with a lower support member and an upper filling member, the lower support member comprises a support table mounted on the rack through a lower connecting piece, and the upper filling member comprises a lower connecting piece; the upper filling component comprises a third movable support capable of moving in a three-dimensional coordinate system, an upper support is mounted on the third movable support through an upper connecting piece, an upper compacting plate is arranged at the bottom of the upper support, an upper vibrator is arranged on the upper support, and a lower vibrator is arranged on the lower vibrator. A vertically-arranged avoiding hole is formed in the end face of the upper compaction plate, an avoiding pipe is arranged at the position of an upper hole opening of the avoiding hole, a storage tank is arranged on the third movable support, a discharging pipe is arranged at the bottom of the storage tank, the bottom of the discharging pipe coaxially stretches into the avoiding pipe and is close to a lower hole opening of the avoiding hole, and the outer diameter of the discharging pipe is smaller than the inner diameter of the avoiding pipe.

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 utility model relates to a steel corrugated plate-concrete connecting system which comprises steel corrugated plates, shearing force connecting pieces and filling concrete. The shearing force connecting piece comprises an anti-pulling steel bar, a lap joint transverse bar, a pre-welding pressing piece and an upper pressing nut. The lower part of the anti-pulling steel bar is provided with a bar body, and the upper end is a multi-shaped anti-pulling head; a transverse rib is arranged in the middle of the rod body, a pre-welding pressing piece and external threads are arranged on the lower portion of the rod body, and an upper pressing nut and an anti-disengaging nut are arranged through the external threads; the shearing force connecting pieces are installed at the bottoms of wave troughs of the steel corrugated plates through through holes, the pre-welding pressing pieces abut against the upper end faces of the steel corrugated plates, the upper pressing nuts abut against the lower end faces of the steel corrugated plates, and the lap joint transverse ribs abut against the two sides of the wave troughs and are welded and fixed. And the concrete is filled to cover the multi-shaped anti-pulling head of the shear connector, so that the binding force and the anti-pulling performance of the steel corrugated plate and the concrete are enhanced. The utility model discloses. An efficient and reliable steel corrugated plate-concrete connecting system is provided, and the shearing force transmission performance and the structural stability are remarkably 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.