1224 results about "Concrete beams" patented technology

The invention relates to the field of constructional engineering, and discloses an assembly type reinforced concrete-steel structure foundation pit supporting system convenient to disassemble and a construction technology, and the assembly type reinforced concrete-steel structure foundation pit supporting system comprises a top beam, a waist beam, a supporting pile and an inner supporting system; the inner supporting system is formed by assembling a standard steel-concrete beam section main support and a steel member auxiliary support in cooperation with a jack adjusting system. The invention further provides a new system on-site assembly construction process, namely detailed steps of assembly construction from the uppermost layer to the lower layer step by step. The fabricated structure integrates the advantages of two fabricated structures, is suitable for foundation pit supporting with large stress and strict deformation control, and has the advantages of being high in construction speed, short in construction period, low in construction cost, convenient to dismantle and capable of completely recycling most of inner supporting components compared with a traditional cast-in-place steel-concrete foundation pit supporting system.

A U-shaped recycled concrete composite beam, and a design and construction method therefor, the U-shaped recycled concrete composite beam comprising a prefabricated concrete casing (11) and cast-in-place compression-zone concrete (12), wherein the prefabricated concrete casing (11) is a recycled concrete casing, and has a U-shaped appearance; the cast-in-place compression-zone concrete (12) is high strength concrete, and the cast-in-place compression-zone concrete (12) is concrete with a strength grade of C50-C80; the thickness h1 of the bottom of the prefabricated concrete casing (11) is not less than 80 mm, and the widths b1 and b3 of lateral surfaces of the prefabricated concrete casing (11) are both not less than 45 mm; the width b2 of the cast-in-place compression-zone concrete (12) is not less than 100 mm; and a steel bar cage is provided in the U-shaped recycled concrete composite beam to serve as a framework. Compared with the prior art, the fire-resistant characteristic of recycled concrete and the excellent mechanical properties of high-strength concrete are fully exerted, the flexural bearing capacity and ductility of the recycled concrete beam can be effectively improved at room temperature, the bursting phenomenon of a fire-exposed surface is reduced at a high temperature, and the temperature field in the beam is significantly reduced.

The invention provides a modular assembly type steel reinforced concrete combined beam column joint and an assembly method thereof. The modular assembly type steel reinforced concrete combined beam column joint comprises a joint core, a steel reinforced concrete combined column, a steel reinforced concrete combined beam, a plurality of single-side self-locking high-strength bolts and a plurality of common high-strength bolts. The node core comprises a node core cavity, at least one connecting end and at least one group of L-shaped connecting end plates; threaded holes are formed in the corresponding positions of the L-shaped connecting end plates. The steel reinforced concrete combination column comprises a column-shaped steel framework and column concrete wrapping the column-shaped steel framework. Bolt holes are formed in the corresponding positions of the columnar steel framework; bolt holes, grouting holes and grout outlet holes are reserved in the corresponding positions of the column concrete; the steel reinforced concrete composite beam comprises a beam shoe, beam H-shaped steel and beam concrete wrapping the beam H-shaped steel. Bolt holes are formed in the corresponding positions of the beam H-shaped steel. The beam shoe is used for being connected with the node core. The scheme has the advantages of convenience in field assembly, high connection reliability, short construction period, capability of realizing dry connection and the like.

The invention provides a reinforcing beam reinforced by adopting an out-of-service wind power blade and a method for determining the bending rigidity. According to the reinforcing beam, a plurality of grooves are formed in at least one surface of a reinforced concrete beam; the reinforcing layer comprises reinforcing ribs and a cement-based composite matrix, a plurality of protrusions are arranged on the surface of the cement-based composite matrix, the protrusions are arranged at intervals in the length direction of the cement-based composite matrix, and the protrusions are correspondingly embedded into the grooves, so that the reinforcing layer is connected with the reinforced concrete beam to obtain a reinforced concrete reinforced beam; wherein the reinforcing ribs are obtained by disassembling and cutting a main beam of the retired wind power blade. According to the reinforcing beam, the combining capacity of the reinforced concrete beam and the reinforcing layer is high, mutual slippage is avoided, the retired wind power blade composite material resources are utilized, the environment is protected, and the cost is saved while high-performance reinforcing treatment can be conducted on the damaged reinforced concrete beam structure or the reinforced concrete beam structure with insufficient bearing capacity.

The invention discloses a cast-in-place concrete beam construction method based on deformation control, and relates to the field of cast-in-place beam construction. S2, foundation treatment; s3, a support is erected and pre-pressed; s4, a formwork is installed; s5, steel bars and prestressed pipelines are installed; s6, concrete construction; and S7, removing the bracket. BIM modeling and an intelligent monitoring system are combined, the foundation treatment range is expanded, an automatic drainage system is arranged, edge settlement and rainwater soaking are effectively avoided, a support system is selected according to needs, anti-sidesway design is strengthened, stress is accurately simulated through graded automatic loading and pre-pressing, reliable deformation data are ensured through double monitoring, pre-camber calculation is scientific, errors are reduced, and the construction efficiency is improved. Formwork, reinforcing steel bars and prestressed pipelines are installed in a standard mode, the structural quality is guaranteed, concrete construction pays attention to temperature control and maintenance, crack reduction and support dismantling are symmetrically carried out in a grading mode, the springback amount is monitored in real time, and construction safety is guaranteed.

The invention discloses a composite structure overhanging steel corbel joint and a construction method, the composite structure overhanging steel corbel joint comprises a composite structure with a built-in steel framework and a steel corbel arranged on the steel framework and used for supporting a crane beam, and the steel framework is provided with a reinforcing assembly used for reinforcing the connecting joint of the steel corbel and the steel framework; the reinforcing assembly comprises a plurality of first reinforcing pieces and a plurality of second reinforcing pieces, and the first reinforcing pieces are arranged at the joints of the tops of the corresponding steel corbels of the steel framework and extend towards the sides away from the steel corbels. According to the invention, the steel crane beam is arranged on the combined structural member formed by combining the steel reinforced concrete column, the concrete filled steel tubular column and the steel reinforced concrete beam, a node method of arranging the steel crane beam on the steel reinforced concrete column, the concrete filled steel tubular column and the steel reinforced concrete beam is defined, and a new design concept and a new construction scheme are developed; reference is provided for similar engineering design and construction, and the method has great application and popularization prospects.

The invention relates to a heavy cover plate building machine which comprises truss girders arranged at intervals, and an overhead layer is formed between every two adjacent truss girders; the U-shaped frame is arranged between the truss girders, and the top surface of the U-shaped frame is lower than the top surfaces of the truss girders, so that a space for stacking templates is reserved; the gate-type supporting frame is mounted on the U-shaped frame in a sliding manner; the hydraulic jack is mounted on the U-shaped frame and is used for fixedly supporting the door-type supporting frame; the guide wheel moving assemblies are installed at the bottoms of the two ends of the truss girder. The track is laid below the guide wheel moving assembly; the unloading block is mounted on the bottom surface of the track; the latticed column is supported on the bottom surface of the unloading block below one end of the truss girder; the structural column embedded bracket is mounted on the side surface of the structural column and is supported on the bottom surface of the unloading block below the other end of the truss beam; the invention discloses a detachable formwork assembly. The construction efficiency of the concrete floor cover plate can be improved, and during slip form construction, the formworks are stacked in the empty space after being disassembled and can move to the next construction section in the direction perpendicular to the concrete beam.

The invention discloses a node structure of a prefabricated assembly type concrete beam column component. The node structure comprises a tenon, a lap joint, a wedge nail groove, a tenon tongue and a tongue hole. A tenon and a lapping opening are formed along the longitudinal symmetry center face of the prefabricated part in a dividing mode, the tenon and the lapping opening are matched in structure and size, one end of the tenon is embedded in the tenon, the other end of the tenon extends outwards from the end face of the tenon, the tongue hole is formed in the side end face of the lapping opening, the tenon is matched with the tongue hole, and the wedge nail groove is formed in the matching plane of the tenon and penetrates through the tenon in the transverse direction. The wedge nail grooves of the two prefabricated parts are oppositely buckled to form a wedge nail hole, a wedge nail penetrates through the wedge nail hole, the tongue hole is formed by a tongue hole embedded part, and the wedge nail groove is formed by a wedge nail groove embedded part; the joint structure adopts a wedge nail tenon structure, lap joint assembly is simple and easy to operate, assembly precision is easy to prefabricate and guarantee, assembly flexibility is higher, stability is good, site construction is friendly, and the joint structure is more suitable for connection between concrete prefabricated parts.

The invention relates to the technical field of beam bridge splicing, in particular to a large-span concrete continuous beam bridge splicing construction method based on intelligent construction. The method comprises the following steps: acquiring digital modeling data of a left bridge and a right bridge to be spliced; analyzing the digital modeling data, and determining the dynamic stress distribution of the whole construction process; acquiring deformation monitoring data in real time, analyzing the deformation monitoring data, and determining a coordinated deformation rule of the left and right bridges; and generating a splicing construction scheme according to the dynamic stress distribution and the coordinated deformation rule. And the decoupling problem of a digital model and a physical entity is eliminated. The problem of stress control blind areas is solved, stress space-time evolution is quantified, it is ensured that stress prediction covers all stages of construction, and the blind areas of a conventional static model are avoided. The problem of quantitative deficiency of the coordination deformation rule is solved, and the defect of neglecting the deformation coordination is avoided. The problem of construction decision lag is solved, the structural damage probability and temperature cracks are reduced, and coupling of construction execution and a physical mechanism is ensured.

The invention relates to the technical field of embedded part positioning, in particular to a magnetic type formwork based on a high-precision concrete beam reverse construction method and a using method. Comprising a bottom die and side dies, embedded part grooves are formed in the upper end face of the bottom die, a magnetic type embedded part positioning mechanism is arranged on the lower end face, under each embedded part groove, of the bottom die, and the magnetic type embedded part positioning mechanisms are used for positioning and demolding of embedded parts; the magnetic type embedded part positioning mechanism comprises an iron column fixed to the lower end face of the bottom die and a wire coil surrounding the peripheral side of the iron column. The device can achieve the dual effects of embedded part fixing and auxiliary demolding, the problems that the number of embedded parts of a high-precision concrete prefabricated part is large, positioning is difficult, and demolding adsorption force is large are effectively solved, and meanwhile formwork deformation or damage during demolding can be effectively avoided.

The invention discloses a stirrup assembly type concrete beam column structure, which relates to the technical field of building structures and comprises a prefabricated lower column, a prefabricated upper column, a left superposed beam and a right superposed beam, the prefabricated lower column, the prefabricated upper column, the left superposed beam and the right superposed beam are distributed in a cross-shaped beam column structure; unique double-spiral stirrup configuration is applied to the column body, so that the torsion resistance and the bearing capacity are enhanced; the longitudinal bars and the stirrups are reasonably arranged on the superposed beam, so that the bending resistance and the shearing resistance are guaranteed. At the joint, the T-shaped channel steel plates, the fixing blocks and the hinged tension connecting rods form an energy dissipation system, and earthquake energy is effectively dissipated. The column body connection adopts the combination of a full-grouting nodular cast iron sleeve and a frame-shaped steel belt, and is matched with a post-pouring laminated layer to realize rigid connection. The limiting mechanism anchors a T-shaped channel steel plate through a double-end pull rod and a self-locking nut, a limiting clamping plate and a torsion spring form anti-pulling self-locking, the anti-seismic property of the joint is enhanced by combining a hinged tension connecting rod, and the structural reliability is improved.

The present invention discloses a method for constructing a large-volume, high-support prestressed concrete beam, which belongs to the technical field of prestressed beam construction. The construction preparation work includes presetting a full-length steel wire rope in a reserved channel for prestressed steel strands, installing a steel strand anchoring mechanism on the entrance side of the reserved channel, installing a limit plate on the exit side of the reserved channel, and presetting marks at the corresponding lengths of the steel strands extending from the movable pipe according to the length of the reserved channel; using the steel strand anchoring mechanism, multiple steel strands are synchronously pulled to the limit plate for cooperation, and the marks on the steel strands are adjusted to the same plane; the steel strands outside the reserved pipe near the anchor plate are cut, and a movable plate is installed, and the movable plates on both sides of the steel strands are tensioned to a preset elongation value; after tensioning is completed, grouting is performed in the reserved channel, and concrete is poured to form the beam body. The present invention can pipe multiple steel strands in the reserved channel as a whole, avoiding friction on the inner wall of the reserved channel and on the steel strands caused by pipe-lining individual steel strands.

The utility model provides a prefabricated concrete beam dry type connection node, which belongs to the field of prefabricated buildings, and is characterized in that an upper high-strength bolt is arranged above the top surface (within the height of a floor) of a prefabricated concrete beam so as to increase the connection arm of force of the upper high-strength bolt, so that equal-strength node connection with a steel bar in the beam is realized by utilizing a single large-diameter high-strength bolt; the installation convenience is greatly improved; the upper high-strength bolt and the lower high-strength bolt are combined for clamping, so that tensile and compression-resistant bidirectional force transmission is realized (in a normal state, the upper high-strength bolt is tensile, and the lower high-strength bolt is compression-resistant; ), so as to cope with the bending moment change of the precast concrete beam under the action of the reciprocating load.

The invention relates to the technical field of prestress construction, in particular to a prestress duct friction resistance measuring method and system based on weak grating optical fibers. Comprising the following steps: during steel strand production, selecting a plurality of steel strands, and implanting weak grating optical fibers into the steel strands to form optical fiber steel strands; when a steel strand is installed, at least one steel strand with optical fibers is installed in a prestressed duct in a concrete beam, and a tensioning end system and an anchoring end system are arranged at the two ends of the installed steel strand; the weak grating optical fiber is connected with an optical fiber demodulator, and a tensioning end system is used for carrying out graded loading on the steel strand; and recording a tension value monitored by each strain grating measuring point, and calculating a pore friction resistance coefficient and a pore deviation coefficient based on the tension values. The measuring method provided by the invention is very simple and very accurate, does not need to purchase a pressure sensor additionally, has low requirements on test conditions, and can be suitable for any prestressed duct shape.

The invention discloses an in-service concrete beam bridge dismantling process structure safety dynamic evaluation method, which comprises the following steps: installing a distributed optical fiber sensor and a high-precision series camera on a beam body, measuring beam body stress and temperature data, transmitting the data to a monitoring system, calculating beam body displacement monitoring image data, and transmitting the data to the monitoring system; based on bridge design data, bridge inspection data and static and dynamic load test data, establishing a corrected bridge disassembly finite element model; and building a bridge disassembly process forward and reverse proxy model based on a deep learning algorithm, and constructing a bridge disassembly process structure safety dynamic evaluation system. The data measured by the distributed optical fiber sensor and the high-precision series camera is real-time global, a large amount of data can be conveniently obtained, the forward and reverse models can be better dynamically corrected on the basis of the global data monitored in real time, and the safety state of the bridge dismantling structure can be dynamically evaluated in real time.

The invention provides a reinforced concrete beam global deformation automatic monitoring method and system, and relates to the technical field of engineering structure intelligent monitoring, and the method comprises the steps: obtaining an original image of a reinforced concrete beam; inputting the original image into the image segmentation model, and outputting a binary mask image; determining a center point of a beam body according to a foreground region in the binary mask image; identifying the edge of the foreground region through an edge detection algorithm and a contour extraction algorithm, and extracting an outer contour point set of the beam body; redundant points in the beam body outer contour point set are removed, and a beam body candidate corner point set is obtained; determining a plurality of target beam body angular points in the beam body candidate angular point set through a heuristic optimization algorithm; dividing the binary mask image into a plurality of edge regions through a central radioactive ray division method; dividing each outer contour point in the outer contour point set of the beam body into a corresponding edge area; constructing a linear profile curve; and calculating the vertical global deformation of the reinforced concrete beam according to the linear profile curve.

The invention relates to a long rectangular steel reinforced concrete column and steel reinforced concrete beam connecting joint and a design method. The long rectangular steel reinforced concrete column and steel reinforced concrete beam connecting joint comprises a steel reinforced concrete column arranged in the vertical direction, a steel reinforced concrete beam arranged in the horizontal direction, a section steel assembly located in a joint area, connecting section steel, reinforcing steel bars and concrete. The profile steel assembly comprises a first web plate, a second web plate and two flange plates which are welded and fixed, the first web plate and the second web plate are vertically arranged and are perpendicular to each other, and the two flange plates are arranged on the two sides of the second web plate correspondingly; the connecting profile steel comprises a third web and two connecting flanges located at the upper end and the lower end of the third web. The first web is welded with a flange of in-column profile steel arranged in the steel reinforced concrete column, the connecting profile steel is welded with a flange plate, in-beam profile steel arranged in the steel reinforced concrete beam is in bolt welding equal-strength connection with the connecting profile steel, and the second web is arranged parallel to the axial direction of the steel reinforced concrete beam; the problems that the built-in profile steel of the beam column cannot be directly connected and the shear bearing capacity of a node core area is insufficient due to the fact that the beam is flush with the column edge are solved.

The invention belongs to the field of constructional engineering, and particularly relates to a connecting joint of a prefabricated reinforced concrete column and a prestressed steel reinforced concrete beam and a construction technology. The structure for connecting the joint by adopting the pi-shaped connecting piece is as follows: one end of the prestressed steel reinforced concrete beam is connected with the pi-shaped connecting piece of the prefabricated reinforced concrete column, a concrete layer is arranged at the top of the section steel at the end, the bottom of the section steel is exposed, and a vertically through bolt channel is arranged along the vertical direction; and one end of the prefabricated prestressed steel reinforced concrete beam extends between the upper web plate and the lower web plate of the pi-shaped connecting piece and is in close contact fit with the upper web plate and the lower web plate. According to the structure of the overhanging short beam-flange clamping sleeve connecting joint, an overhanging short beam is arranged at the joint of a prefabricated reinforced concrete column and a prestressed steel reinforced concrete beam, and the prefabricated reinforced concrete column is connected with the prestressed steel reinforced concrete beam through the overhanging short beam on the prefabricated reinforced concrete column; and the prestressed steel reinforced concrete beam is clamped on the flange clamping sleeve at the end part of the overhanging short beam through the flange plate at the end part.

The invention relates to a method for calculating the bearing capacity of an embedded steel bar beam under the fatigue load effect, and belongs to the technical field of engineering structure reinforcement and transformation. Comprising normal section flexural capacity calculation under the static load effect, normal section fatigue stress calculation, oblique section shear capacity calculation under the static load effect and oblique section fatigue stress calculation. The method for calculating the bearing capacity of the embedded steel bar beam is given by considering the influences of the concrete compressive strength, the section size, the embedded steel bar drilling position, the tensile strength of steel bars in an original component, the external load form and the like. According to the method, the known plane section assumption and the stress equivalent graph are calculated by adopting the bearing capacity of the concrete structure, the balance equation of the bending moment and the force is established, and derivation is performed according to the truss-arch theoretical mechanical model and the fatigue stress damage amount obtained by the test in combination with the component damage form limited by the existing specification, so that the reliability is relatively high; and a new thought can be provided for research on the bending-resistant and shearing-resistant bearing capacity of the embedded steel bar concrete beam.

The invention relates to an efficient concrete crack detection method, device and system. The method comprises the following steps: acquiring an image of a to-be-detected concrete beam; generating a hierarchical grid backbone network of redundant features based on linear transformation, and performing feature extraction processing on the to-be-detected concrete beam image to obtain multi-scale feature information; performing feature fusion processing on the multi-scale feature information based on a geometric perception dynamic feature pyramid network to obtain fused feature information; based on task alignment of the dynamic detection head and classification and positioning processing of the fusion feature information, the target crack information corresponding to the to-be-detected concrete beam image is obtained, the concrete crack detection accuracy is improved, the weak texture feature extraction and retention capability is significantly enhanced, the leak detection risk of fine cracks is effectively reduced, and the detection efficiency is improved. The anti-interference capability under a complex background is enhanced, the false detection rate is reduced, mismatching of classification and positioning tasks is avoided, and the crack positioning precision is improved.

The invention belongs to the technical field of bridge construction and maintenance, and particularly relates to a diaphragm plate reinforcing device during integral jacking of a concrete T-beam and a construction method thereof. A diaphragm plate reinforcing device used during integral jacking of a concrete T-shaped beam comprises a plurality of bolted fixed frame beams, a horizontal displacement adjusting mechanism, a prestressed steel beam and a monitoring mechanism, and a plurality of horizontal connecting cross beams are arranged between every two adjacent bolted fixed frame beams; the horizontal displacement adjusting mechanism is arranged between the bolted fixing frame and a T-beam web of the diaphragm plate, the prestressed steel beam is arranged in the horizontal connecting cross beam, the bearing capacity of the diaphragm plate is enhanced through tensioning, and the monitoring mechanism comprises a stress sensor, a displacement sensor and a tilt angle sensor. The device is used for monitoring the stress, displacement and inclination angle of the diaphragm plate and the bolted fixed frame beam in real time. The device is stable in structure, convenient to install and high in adaptability, the state of the diaphragm plate can be monitored in real time, and the problems that in the T-beam jacking process, the diaphragm plate is prone to cracking, and the overall rigidity is insufficient are effectively solved.

The utility model provides a 3D printing concrete beam with an embedded intelligent mortar rod, which relates to the technical field of constructional engineering and comprises a 3D printing concrete beam, at least two reinforcing steel bars are embedded in the 3D printing concrete beam, and at least one intelligent mortar rod is further embedded between the two reinforcing steel bars in the 3D printing concrete beam. The shape, structure and size of the intelligent mortar rod are consistent with those of the steel bar; at least one electrode is fixed on the intelligent mortar rod, and an external wire is connected to the electrode so as to measure the resistance change rate of the intelligent mortar rod; the concrete crack monitoring device can effectively monitor the concrete crack at the reinforcing steel bar of the 3D printing concrete beam.

The utility model discloses an inclined column template support frame for cast-in-place of a concrete beam, which is characterized in that a vertical steel pipe upright post and an inclined steel pipe upright post are fixedly arranged on a bearing platform by utilizing bearing platform anchor bolts, and the vertical steel pipe upright post and the inclined steel pipe upright post are pulled into a whole by a horizontal pull rod along the direction of a bridge; the inclined steel pipe stand columns at the corresponding positions in the single span are connected into a whole through corner connectors and horizontal cross rods. The unloading blocks are arranged on the top faces of the vertical steel pipe stand columns and the top faces of the corner connectors respectively. A bearing beam is placed on the top face of the unloading block in the transverse bridge direction, a bailey beam is arranged on the top face of the bearing beam in the bridge direction, a distribution beam is placed on the top face of the bailey beam in the transverse bridge direction, and the batter post formwork supporting frame for concrete beam cast-in-place is formed. The bearing platform is fully used as a supporting point, the inclined steel pipe stand columns are arranged to share the upper load, a strip-shaped foundation does not need to be additionally arranged, construction cost is saved, the spanning capacity of the support is greatly improved, and the support is a preferable scheme for spanning rivers, roads and bridge sites in a large-span mode when the geological environment is poor.

The invention relates to the technical field of cranes, in particular to an automatic control system of a portal crane, which comprises an identification module, a parameter adjustment module and an execution module which are in signal connection in sequence, the identification module comprises a camera and an image processing unit, the camera is arranged on a lifting appliance of the portal crane, and the image processing unit is arranged on the portal crane. The camera synchronously ascends and descends along with ascending and descending of the lifting appliance, the image processing unit performs feature extraction and comparison on shot images, if the images are identified as concrete beams, the parameter adjusting module adjusts the lifting parameters to be first preset parameters, and if the images are identified as steel beams, the parameter adjusting module adjusts the lifting parameters to be second preset parameters; according to the gantry crane, the identification module can accurately identify whether a hoisting object is a concrete beam or a steel beam in real time, and the operation parameters and the motion logic of the gantry crane are optimized according to the identification result, so that the safety and the efficiency are both considered.

The utility model discloses a large-span steel-concrete mixed continuous rigid frame bridge structure. Comprising a plurality of concrete beam sections, a steel box beam section is arranged between every two adjacent concrete beam sections, the concrete beam sections and the steel box beam sections are connected through steel-concrete connectors, and the concrete beam sections are supported through steel wall piers; steel beam anchoring areas are arranged in the steel beam transition sections of the steel box beam sections, and longitudinal prestressed steel beams in the concrete beam sections penetrate through the adjacent steel-concrete connectors and are anchored in the steel beam anchoring areas on the corresponding sides. According to the utility model, the mid-span part concrete beam is replaced by the steel box beam section, so that the self weight of the structure is reduced, the side-mid span ratio is reduced, the shrinkage creep effect is reduced, the spanning capability of the bridge is improved, and the economic effect is increased; the longitudinal prestressed steel beam penetrates through the steel-concrete connector and is anchored in the steel beam transition section of the steel box beam section, and the connecting strength of the steel box beam section and the concrete beam section can be improved.

The invention discloses a concrete synchronous spraying and curing device for a bridge fabrication machine, and particularly relates to the field of bridge fabrication, the concrete synchronous spraying and curing device comprises a hanging bracket mounted on a bridge fabrication rack, the bridge fabrication rack is slidably mounted on a concrete beam section, a hollow section component is arranged in the middle of the concrete beam section, and a spraying mechanism is mounted on the hanging bracket; the spraying mechanism and the hanging bracket are in sliding connection through a linear guide rail mechanism, the spraying mechanism comprises a fixing base, a second linear driver is arranged on one side of the fixing base, and spraying head assemblies are installed at the two ends of the second linear driver; a first rotary driver is installed in the fixing base, the output end of the first rotary driver is fixedly connected with a first linear driver, and the output end of the first linear driver is connected with a connecting plate. According to the invention, the surface and the corners of the template are uniformly sprayed, so that the spray head can reach the corners, the uniform spraying and continuous process of the web part, the top plate part, the bottom plate part and the corners are ensured, and the construction period and acceptance are ensured to be completed on time.

The utility model discloses a prefabricated wall externally mounted superimposed bay window panel structure, comprising: a prefabricated exterior wall, the inner side of which is provided with reinforcing steel bars hooking the first reserved steel bars; a concrete beam, which is transversely fixed to the bay window panel side by the first reserved steel bars on the lower side of the prefabricated exterior wall; an upper window sill, which is cast on the upper surface of the concrete beam and cast as a whole; a superimposed lower window sill, comprising a superimposed lower window sill prefabricated small board and a superimposed lower window sill beam secondary casting superimposed layer, the superimposed lower window sill prefabricated small board is built between the prefabricated exterior wall and the concrete beam, the superimposed lower window sill beam secondary casting superimposed layer is cast on the upper side of the superimposed lower window sill prefabricated small board and is bonded and cast as a whole with the upper end of the concrete beam. The present application can complete the reliable connection between the prefabricated exterior wall and the cast-in-place bay window beam, avoid the difficulty of assembling and positioning the fully prefabricated bay window, and improve the overall seismic performance of the structure under the premise of meeting the prefabrication rate, and enhance the convenience, economy and reliability of the installation of the prefabricated bay window.

The invention discloses an accurate positioning method and detection device for corrosion of steel bars in a concrete beam, and the method comprises the following steps: a) arranging a scanning track in parallel along the length direction of the concrete beam, and having a preset lift-off height between the scanning track and the concrete beam; b) moving the magnetic sensor along the scanning track, and collecting a position signal of the magnetic sensor and a magnetic signal of a corresponding position in the moving process; and c) drawing a magnetic curve of a plurality of magnetic signals which are acquired when the magnetic sensor moves along the scanning tracks with different lift-off heights and change along with the position signals, and judging the direction and the corrosion area of the corrosion reinforcing steel bar in the concrete beam according to the shape and the fluctuation characteristic of the magnetic curve. According to the method and the device, the direction and the corrosion area of the corroded steel bar are judged through different magnetic curve shapes and fluctuation characteristics, the direction and the corrosion area of the corroded steel bar in the concrete beam can be accurately positioned, and accurate information is provided for subsequent maintenance.

The invention discloses a concrete beam damage assessment method and system fusing crack images and multi-scale features, and relates to the technical field of structural health monitoring. The method comprises the following steps: firstly, obtaining a binary image based on an original crack image of a concrete beam body; then, explicit features representing the macroscopic geometrical morphology of the crack are extracted from the binarized image, and implicit features representing the microscopic complexity and heterogeneity of the crack based on the multi-fractal theory are extracted from the binarized image; secondly, fusing the two types of features to form a fused feature space; and finally, training a machine learning model based on the feature space, establishing a nonlinear mapping relation between the machine learning model and a concrete beam damage factor, and realizing automatic and quantitative evaluation of a damage state by using the model. According to the method, dominant and recessive multi-scale features are fused, the defects that a traditional method depends on artificial experience and feature extraction is one-sided are overcome, the damage state can be represented more comprehensively and accurately, and the objectivity, accuracy and efficiency of evaluation are remarkably improved.

The invention provides a regional concrete beam and slab formwork and supporting system optimization design method. Firstly, initial database parameter information is set, parameter information of beams and plates is extracted through Revit software, and the information is preset; establishing a main ridge optimization model of the beam side formwork, comparing a calculated value with a limit value, and dynamically adjusting the number of supports to meet standard requirements; the number of beam bottom transverse vertical rods is determined, the distance between beam bottom longitudinal vertical rods is optimized, and it is ensured that all conditions meet the limit value standard; setting the limit spacing of the vertical rods at the bottom of the plate, and gradually adjusting parameters to meet the design requirements of stress values and bearing capacity. And finally, in Revit software, according to concrete beam and plate information and preset information, utilizing the optimal template configuration data to construct a complete template and support system. According to the whole process, from data initialization to specific component optimization to final result application, automatic design and optimization of the concrete beam, the plate formwork and the supporting system are achieved, and the design efficiency and precision are remarkably improved.