1191 results about "Box girder" patented technology

The invention discloses a multi-sensor fusion-based suspended casting box girder hanging basket state monitoring method and system, and relates to the technical field of intelligent monitoring of engineering equipment. The method comprises the following steps: collecting deformation monitoring data and environment data of a hanging basket system in an operation process; constructing a hanging basket system deformation quantity prediction model taking the deformation monitoring data and the environment data as input; training the prediction model by using historical monitoring data, and minimizing a prediction error by adjusting model parameters; and outputting a hanging basket system deformation quantity prediction result by using the trained prediction model, and effectively improving the precision and reliability of deformation quantity prediction by combining a convolutional neural network and a long-short-term memory network, thereby providing powerful support for safety monitoring and quality control of bridge construction.

The invention belongs to the technical field of steel reinforcement framework three-dimensional reconstruction, and particularly discloses an automatic high-precision three-dimensional dense reconstruction method for a box girder steel reinforcement framework, which comprises the following steps of: dividing a scanning area into a plurality of sub-areas according to a depth image by moving an inspection robot along the steel reinforcement framework, and performing multi-angle local scanning in each sub-area; constructing a local point cloud model by combining camera poses during acquisition, further calculating a relative spatial transformation relationship by using an overlapping region between adjacent local models, constructing a pose map and implementing global optimization, and uniformly adjusting the poses of the local models in a world coordinate system; and finally, all corrected local point clouds are fused to generate a complete global three-dimensional model, so that collaborative reconstruction operation of domain-divided scanning, segmentation reconstruction and global optimization is realized, frame-by-frame accumulation of errors in traditional scanning-while-splicing reconstruction is effectively blocked, long-distance drift is remarkably inhibited, and the precision of three-dimensional reconstruction of the reinforcement cage is greatly improved.

The invention provides a box girder defect recognition method and system based on structured light and deep reinforcement learning, and relates to the technical field of box girder defect recognizing.The method comprises the steps that equipment integration and joint calibration are conducted on a to-be-detected box girder component, structured light projection is conducted according to a preset track, and a to-be-detected box girder component is obtained; the method comprises the following steps: triggering an event camera to image by utilizing controlled stroboscopic scanning of structured light, obtaining an event stream and a structured light depth map, carrying out representation conversion and multi-modal alignment, obtaining multi-modal mapping alignment data to carry out primary defect identification, obtaining an initial defect identification result, and triggering a deep reinforcement learning active perceptron to carry out perception strategy analysis. And obtaining a perception strategy analysis result, and carrying out deepening defect identification on the to-be-detected box girder component to obtain a defect identification result. The technical problems that in the prior art, box girder defect detection is low in detection efficiency, not high in accuracy and poor in detection comprehensiveness are solved. The technical effect of improving the efficiency, accuracy and comprehensiveness of box girder defect detection is achieved.

The invention discloses a variable cross-section cast-in-place box girder arc-shaped wing plate supporting structure which comprises a disc buckle full supporting frame, an adjusting vertical rod is arranged at the upper end of the disc buckle full supporting frame, a jacking is arranged at the upper end of the adjusting vertical rod, main keels are arranged at the upper end of the jacking, multiple sets of auxiliary keels are arranged at the upper ends of two main keels, and formworks are arranged at the upper ends of the auxiliary keels. A positioning strip is arranged on one side of the upper end of the template; a height adjusting block is arranged on one side of the positioning strip The arc-shaped truss is arranged obliquely above the formwork, and one end of the arc-shaped truss is located at the upper end of the height adjusting block. The method has the advantages that the arc-shaped truss is machined according to the arc-shaped size of the box girder wing plate, the size and radian precision is high, the construction quality is easy to guarantee, the applicability is high, the variable cross-section height is partitioned, the height is adjusted through the height adjusting blocks, the machining model number of the arc-shaped truss is reduced, and the machining cost is reduced. Only several standard parts are adopted for machining, the problem that the sizes of wing plates of the variable cross-section sections are inconsistent can be solved, the positioning strips are adopted for installation and positioning, and the installation deviation of the arc-shaped truss is reduced.

The invention discloses a fabricated steel-UHPC external prestressing combined box girder and a construction method and application thereof, and relates to the technical field of bridge engineering, the fabricated steel-UHPC external prestressing combined box girder comprises a prefabricated steel-UHPC combined top plate, a prefabricated steel-UHPC combined bottom plate, a prefabricated steel-UHPC combined web plate, a steel diaphragm plate and an external prestressing system. The box girders are formed by combining prefabricated slabs, the prefabricated web plates are firmly connected with the prefabricated top plate and the prefabricated bottom plate through welded steel plates and post-poured UHPC, and arrangement and tensioning of external prestress are achieved by arranging steel anchor boxes and steering gears in box chambers. According to the combined box girder, the steel and the UHPC are combined to form a structural form that the steel plate is wrapped by the UHPC, and the advantages of high strength, high durability, high toughness, high compactness, low creep and the like of the UHPC and the advantages of high strength, high elastic modulus and weldability of steel are fully utilized, so that the box girder has the advantages of being excellent in structural stress performance, light in overall weight, good in durability, small in later-stage deformation, low in cost and the like. And the hoisting device is especially suitable for bridges in urban rail transit or urban railways.

The invention provides a box girder concrete pouring path tracking method and system based on a Beidou system. The method comprises the following steps: firstly, constructing a box girder BIM model, and carrying out layered and segmented subdivision according to a preset rule to form a plurality of three-dimensional latticed pouring areas; material distribution opening positioning data are obtained in real time through a Beidou system, and matching calibration is conducted on the material distribution opening positioning data and BIM model space coordinates. And based on the calibrated model, the initial position and the target position of the pouring arm are determined in combination with the geometric parameters of the pouring area and a preset sequence rule. And taking the minimum material distribution time and the maximum material distribution uniformity as optimization objectives, and considering mechanical motion limitation to generate an optimal pouring path. In the pouring process, the position of a pouring arm is tracked in real time through Beidou positioning data, pouring is completed according to a planned path, meanwhile, pouring state identifiers of all areas in the BIM model are dynamically updated, and full-process visual tracking is achieved. According to the technical scheme, the construction precision and the intelligent level of box girder concrete pouring are improved.

The invention discloses a split type three-box girder nonlinear vortex vibration steady-state amplitude intelligent prediction method, belongs to the field of bridge vortex-induced vibration control, and aims to solve the problem of low accuracy of three-box girder vortex vibration nonlinear modeling and amplitude prediction. The method comprises the following steps: acquiring displacement time sequence data through a reduced scale model wind tunnel test, preprocessing to obtain displacement, speed and acceleration dimensionless data, and dividing a data set; constructing a candidate function library containing high-order polynomial terms of the primary function; performing nonlinear system sparse recognition by taking acceleration data as a target item and combining an improved algorithm to obtain a preliminary feature set; a final feature set is obtained through energy-statistics-self-adaption three-stage screening; and finally, constructing a control equation to predict the steady-state amplitude. The method can accurately predict amplitude, coincide test and real bridge observation results, and is less in computing resource occupation and high in numerical value precision.

The invention provides box girder bottom and web reinforcement cage framework streamlined production equipment, and belongs to the technical field of box girder prefabrication processing. The box girder bottom and web reinforcement cage framework streamlined production equipment comprises a moving seat which is linearly and slidably mounted on the ground, and a longitudinal bar fixing assembly is arranged at one end of a first rail; an automatic welding machine, a tidying mechanism and a stock bin are sequentially arranged on the moving seat in the direction that the moving seat slides away from the longitudinal bar fixing assembly, the stock bin is used for horizontally arranging and placing the combined stirrups, shifting assemblies are further arranged on the moving seat and located on the two sides of the stock bin, and the tidying mechanism is used for fixing the combined stirrups and positioning longitudinal bars; the automatic welding machine is used for welding the joints of the combined stirrups and the longitudinal bars on the arranging mechanism, and a supporting assembly is arranged below the moving seat. The combined stirrups can be taken out of the stock bin through actions of the arranging mechanism and the material stirring machine, then the automatic welding machine is used for welding, the moving seat moves backwards by a certain distance after one round of welding, the next round of welding of the combined stirrups is carried out, and the welding and manufacturing efficiency of a reinforcement cage framework is improved.

The invention discloses a transverse fixed axle assembly capable of achieving Ackerman steering through mechanical linkage, and belongs to the technical field of engineering vehicle chassis. A rear axle is transversely and rigidly fixed to a frame through a shear-resistant box girder structure, and a front axle is connected to the frame through two springs; the rotating pair structures are symmetrically arranged at the two ends of the axle main body and comprise embedded heavy-duty bearings; one end of the steering knuckle arm is hinged to the axle main body through a rotating pair structure, and the other end is connected with the steering pull rod; one end, far away from the rotating pair structure, of the steering pull rod is connected with the steering oil cylinder; the steering pull rod of the front axle and the steering pull rod of the rear axle are crossed and hinged in an X shape, so that intersection points of axes of the front and rear wheels converge at an instantaneous steering center during steering. Abrasion and slipping of tires can be reduced, steering precision is ensured through a pure mechanical structure, the failure risk of an electric control system is avoided, and the system is suitable for heavy equipment such as mining trucks and port cranes.

The utility model relates to the technical field of prefabricated box girder production, in particular to a movable prefabricated box girder bottom formwork system which comprises multiple sets of equipment bases, a supporting frame is arranged between the left set of equipment bases and the right set of equipment bases, the upper side of the supporting frame is fixedly connected with a bottom formwork, and the upper side of each equipment base is provided with an adjusting assembly. The adjusting assembly comprises a first hydraulic cylinder, a positioning frame, a second hydraulic cylinder, a first side plate, a supporting block, a limiting rod, a second side plate, a limiting clamping block, a cross beam and a sleeving groove, multiple sets of transverse positioning sliding grooves are formed in the upper surface of the equipment base, multiple sets of positioning sliding blocks are fixedly connected to the lower surface of the positioning frame, and the positioning sliding blocks are in sliding connection with the positioning sliding grooves; the first hydraulic cylinder pushes the positioning frame to slide on the surface of the equipment base to quickly adjust the distance between the templates on the left and right sides, and meanwhile, the second side plate slides up and down on the surface of the limiting rod, so that the heights of the templates on the left and right sides are quickly adjusted, the sizes of the templates are conveniently adjusted, and the preparation efficiency of the prefabricated box girder is improved.

The invention discloses a suspension bridge pin shaft fork ear connecting piece load-wear fatigue test device, which comprises a lever prying force application device, a fatigue test device and a fatigue test device, comprising a lever prying support, a fork-shaped lug plate force application plate arranged at the top end of the lever prying support, and a force transmission lever arranged below the fork-shaped lug plate force application plate to drive the fork-shaped lug plate force application plate to move up and down. The torque force application device is used for providing torque, enabling the fork-shaped lug plate to be in close contact with the box girder lug plate and simulating an actual back-twist phenomenon, and comprises an upper layer mechanism and a lower layer mechanism which rotate relatively, and a high-strength torsion spring and a torque sensor which are buckled inside by the upper layer mechanism and the lower layer mechanism; the abrasion sliding device is arranged at the bottom of the lever prying support and connected with the bottom of the torque force application device, and the operation state of the fork-shaped lug plate in an actual structure is simulated, so that the fork-shaped lug plate generates back-twist abrasion damage. According to the invention, a large tonnage, namely the stress state of the connecting piece under an actual bridge load, can be fully simulated through a test, and fatigue test evaluation after wear damage is carried out on the connecting piece.

The utility model discloses a steel-concrete box girder assembly jig frame, which relates to the technical field of steel-concrete box girder assembly and is characterized in that the top of a support frame is connected with a plurality of groups of limiting frames in a sliding manner, a plurality of groups of jacks are respectively positioned on the periphery of the support frame, the top ends of the jacks are fixedly connected with guide rods, and the top ends of the guide rods are fixedly connected with the support frame; the multiple sets of supporting columns are fixedly connected with the bottom end of the jack. The jack drives the guide rod to vertically move upwards so as to abut against the supporting frame to move to the position with the appropriate elevation of the steel-concrete box girders, and when the two steel-concrete box girders are placed on the supporting frame, the phenomenon that the height of the supporting frame is reduced due to the fact that the height of a ship is reduced is avoided; therefore, it is guaranteed that the reinforced concrete box girder is located at the designed elevation position when placed on the supporting frame, then the assembling accuracy of the reinforced concrete box girder is guaranteed, the periphery of the supporting frame can be adjusted through the four sets of jacks, and therefore the supporting frame is located at the horizontal position.

The invention belongs to the technical field of bridge engineering, and particularly relates to an analysis method for intelligently sensing a hanging basket of a corrugated steel web box girder bridge, a terminal and a storage medium, and the method comprises the steps: obtaining deformation data of a plurality of measurement points installed on the hanging basket of the corrugated steel web box girder bridge in an actual asynchronous method construction process; establishing an initial finite element model based on the geometric information of the hanging basket structure, and setting an elastic constraint condition at each support position of the initial finite element model; according to the invention, the static level gauge, the inclinometer and the strain gauge are arranged at the key positions of the hanging basket to construct a multi-source sensing monitoring network, so that the cooperative sensing of the vertical displacement, the inclination attitude and the structural strain is realized, and the comprehensiveness and accuracy of the state sensing in the construction process are effectively improved. Secondly, a vertical spring unit is introduced into the finite element model to serve as elastic constraint, the vertical compression deformation behavior of the corrugated steel web under the load effect is truly simulated, and the physical authenticity of boundary conditions is remarkably improved.

The invention discloses a rapid tool lifting system for road and bridge construction. The rapid tool lifting system comprises a rail and a sliding table installed on the rail in a sliding mode. The driving mechanism is fixedly mounted on the sliding table; the lifting mechanism is mounted at the upper end of the driving mechanism; the connecting seat is fixed at the lifting end of the lifting mechanism; the lifting mechanism is fixedly mounted at the front end of the connecting seat; and the winding mechanism is detachably mounted at the upper end of the connecting seat. The rainproof cloth which can be controlled by the rolling mechanism is arranged on the outer side of the lifting mechanism, so that the flexible protective cover which can be opened and closed is formed, when the tool is lifted and moved, the rainproof cloth can be put down, a wrapping space is formed, the tool is effectively prevented from colliding and scraping with a surrounding bridge structure (such as a pier, a guardrail and a box girder), and the service life of the tool is prolonged. And meanwhile, most of pollutants such as dust and cement paste can be isolated, cleaning of tools and a lifting mechanism is protected, and the service life of equipment is prolonged.

The invention relates to the technical field of gantry crane dynamic operation safety testing, in particular to a crane dynamic operation safety testing method which comprises the following steps: step 1, multi-dimensional static calibration; step 2, fault coupling simulation; step 3, structured data processing; step 4, coupling judgment; step 5, source tracing; and step 6, carrying out targeted rectification. A multi-dimensional static calibration, fault coupling simulation and targeted rectification scheme is designed according to the structure and working conditions of cart one-way walking, main beam-supporting leg rigid welding, long track bearing, bilateral braking and open-air operation of the gantry crane. The limitation of insufficient adaptability to the integrated structure of the gantry crane in the prior art is broken through, and the problem of test distortion caused by neglecting equipment attributes is solved. Aiming at the characteristics that the box type girder of the gantry crane is large in torsional rigidity, small in torsional deformation and mostly caused by internal defects or uneven external stress, progressive traceability of internal defect detection, external load checking and connection state checking is adopted.

The embodiment of the invention discloses a vibration control method and system for a steel-concrete combined box girder bridge, and the method comprises the steps: carrying out the vehicle-bridge coupling vibration analysis through building a space finite element model which accurately considers the interface slippage and shear hysteresis effect; an initial optimal parameter group of the multi-tuned mass damper is optimized and determined based on an analysis result, and installation tuning is carried out; in the operation stage of the bridge, vibration is monitored in real time through the sensor system, parameters of the damper are dynamically adjusted by the controller according to the deviation between measured data and a target value, and self-adaptive control is achieved. Thus, high-precision simulation, optimization design and intelligent control are combined, the problem that the control effect is poor due to model simplification and fixed parameters in a traditional method is solved, and vibration suppression accuracy and environmental adaptability are remarkably improved.

The invention provides an unequal-span steel box girder swivel construction measuring point arrangement and monitoring method, and relates to the technical field of steel box girder construction, and the method comprises the following construction steps: S1, installing a reference system; s2, establishing a central reference; s3, monitoring the turning process; s4, carrying out falling position control and fine adjustment; s5, measuring point arrangement and synchronous monitoring; s6, data analysis and feedback control; and S7, confirming and recording in place. According to the invention, through combination of optical reference and multi-point synchronous monitoring, attitude control and alignment fine adjustment of the whole rotation process are realized, and high-precision in-place of the box girder under complex conditions is ensured.

The invention provides a winding type integrated forming method for a prefabricated small box girder reinforcing steel bar component. The winding type integrated forming method comprises the steps that S1, the structural design of the reinforcing steel bar component is conducted; S2, equipment arrangement is conducted; s3, longitudinal bar material distribution in inner bar manufacturing; s4, inner rib winding manufacturing; s5, mounting a corrugated pipe; S6, manufacturing outer ribs; s7, assembling the steel bar component; and S8, forming the reinforcing steel bar component. The inner ribs and the outer ribs of the whole structure are integrally formed in a winding mode, a double-layer closed-loop combined longitudinal rib connection three-dimensional structure is formed, the structure is closed, the compressive strength of a component can be improved, and the local collapse risk is avoided. The longitudinally-wound steel bars can restrain radial deviation of the longitudinal bars, and the stability is improved by being matched with supporting of the inner bars. When the inner rib and the outer rib are welded, the longitudinal ribs are stretched while rotating, the longitudinally wound steel bars are welded with the longitudinal ribs, point-by-point welding is not needed, only the wound steel bars are welded with the longitudinal ribs, and compared with closed stirrups manufactured in an existing manufacturing mode, the welding workload is greatly reduced, and meanwhile strength loss caused by welding breakpoints is avoided.

The invention provides a bridge incremental launching construction monitoring method and system based on multi-source data fusion, and the method comprises the steps: obtaining the strain and temperature data of a box girder in real time in a non-incremental launching state, and judging whether a construction environment is abnormal or not according to the strain and temperature data of the box girder; in the pushing state, posture data of the box girder, stress and strain of the box girder and displacement of the temporary piers are obtained in real time, and real-time deviation correction or manual intervention is conducted according to the posture data of the box girder, the stress of the box girder and the displacement of the temporary piers. By detecting multi-source data such as jacking, pushing, deviation correction displacement, structural strain, temperature and oil pressure, real-time deviation correction and construction environment adjustment are achieved, the pushing precision can be guaranteed, and structural instability is avoided.

The invention belongs to the technical field of bridge construction, and particularly relates to a steel bridge diagonal bracing node fatigue assessment hot spot stress method based on machine learning. By constructing a hot spot stress concentration coefficient Gaussian regression process proxy model of the steel bridge inclined strut nodes, a mapping relation is established among geometric parameters of the steel bridge inclined strut nodes, welding seam type input variables and hot spot stress concentration coefficient output, so that the hot spot stress of different inclined strut nodes on different steel bridges is quickly determined. And in combination with a hot spot stress S-N curve and a random traffic flow loading method, realizing fatigue performance evaluation of the steel bridge diagonal bracing node. The method is suitable for various steel bridge structure systems including diagonal bracing nodes, including truss girders, box girders, long cantilever combined structures and the like, and has good engineering adaptability and popularization value.

The invention relates to an optimization method for a cast-in-place section support of a hybrid beam cable-stayed bridge. The optimization method comprises the following steps that S1, environment parameters needed by modeling, attribute parameters of a bridge and spatial position limiting parameters of the support are determined; s2, determining the overall arrangement of the support; s3, determining arrangement of a box girder inner mold and an inner mold support; s4, determining the arrangement of a box girder outer mold and longitudinal and transverse distribution girders; s5, constructing a single-beam finite element model to carry out bracket overall calculation; s6, determining a preliminary scheme of the support, and establishing a three-dimensional finite element model for mechanical calculation of the support; s7, establishing a support-girder finite element model for cooperative calculation; s8, carrying out support pile foundation design and settlement calculation; s9, the pre-lifting amount of the cast-in-place section support is calculated; and S10, carrying out cast-in-place section support structure design. Safety and stability of the support in the whole construction period of the cable-stayed bridge can be guaranteed.

The invention relates to a railway girder and truss integrated bridge shed and a construction method thereof. The railway girder and truss integrated bridge shed comprises low-height prestressed concrete box girders, truss web members, truss upper chords and cast-in-place reinforced concrete plates. The truss upper chord members are positioned on two transverse sides above the low-height prestressed concrete box girder and are longitudinally arranged; the truss web members are arranged on the two transverse sides of the low-height prestressed concrete box girder and are longitudinally inclined, the tops of the truss web members are fixedly connected to the truss upper chord members, and the bottoms of the truss web members are fixedly connected to the low-height prestressed concrete box girder; a cast-in-place reinforced concrete plate is arranged on the top of the truss upper chord, and the bottom of the cast-in-place reinforced concrete plate is poured into the truss upper chord, namely concrete is poured into the truss upper chord. The truss structure and the box girder are effectively connected, so that the truss not only bears the supporting effect of the protective component, but also forms a stress whole with the main girder, the defect that additional load of a traditional shed tunnel acts on the main girder is overcome, and the overall rigidity, stability and durability of the structure are remarkably improved.

The utility model discloses a jack mounting bracket, which particularly relates to the technical field of bridge construction, and comprises a slideway assembly which is arranged in a box girder and is used for supporting a jacking jack and a tensioning jack, the slide way assembly comprises a slide way frame arranged in the box girder, and two sets of slide rail pieces are installed on the front side of the slide way frame. Each sliding rail piece comprises two sliding way supporting rods, a plurality of arc-shaped supporting rods distributed at intervals are installed between the two sliding way supporting rods, and a plurality of first wedge-shaped limiting stoppers distributed at intervals are installed at the bottoms of the sliding way supporting rods. According to the box girder tensioning device, the slideway assembly and the supporting piece are conveyed into the box girder to be spliced, the jacking jack is conveyed to the sliding rail piece of the device after splicing is completed, tensioning can be started after the jacking jack is installed for jacking and the tensioning jack is jacked in place, the structure is simple, installation is convenient, and the cost is low. The construction efficiency can be effectively improved; and the labor cost is reduced.

The utility model relates to the technical field of bridge construction, in particular to a bridge beam plate reinforcing structure which comprises a box beam arranged at the upper end of a foundation pile, and a fixing mechanism is fixedly arranged on the side wall of the box beam. The fixing mechanisms on every two adjacent box girders are arranged at the same height, a transverse pulling mechanism is arranged between every two fixing mechanisms at the same height in a clamped mode, and the transverse pulling mechanisms and the fixing mechanisms are connected in a sliding mode in the longitudinal direction of the box girders. According to the reinforcing structure of the bridge beam plate, on the basis that the structure of the bridge beam plate is reinforced, the influence generated by the telescopic stress of the bridge beam plate is avoided.

This invention discloses a construction method for cast-in-place box girder spanning an existing overpass, comprising the following steps: Step 1: Construction preparation stage, including foundation treatment, formwork processing, and steel reinforcement processing; Step 2: Erection and reinforcement of full-span scaffolding. First, the scaffolding is erected. After the scaffolding is erected, the bottom formwork and outer side plates of the box girder are installed. Then, the scaffolding is pre-stressed. After unloading, the elevation of the bottom formwork is adjusted as needed. Finally, the inner side formwork and the bottom formwork of the top plate of the box girder are installed; Step 3: Casting of the box girder. After the entire cross-section of the box girder is cast, it is cured. Tensioning is performed when the concrete strength reaches 85% of the design strength, and finally, grouting is carried out; Step 4: Dismantling of the scaffolding. In this invention, disc-lock full-span scaffolding is used to reinforce existing highway bridges. Disc-lock full-span scaffolding is then erected on top of the existing highway bridge as cast-in-place scaffolding. Installation and dismantling are convenient and can save construction time.

This invention belongs to the field of box girder formwork technology, specifically relating to a box girder formwork that facilitates continuous casting. It includes a horizontal rail support installed between two piers, with a movable trolley mounted on the horizontal rail support, capable of moving between the two piers. The movable trolley is equipped with an outer mold unit and an inner mold unit located inside the outer mold unit, forming a casting cavity between the outer and inner mold units. The front, rear, and top sides of the casting cavity are open. The outer mold unit can expand away from the casting cavity, and the inner mold unit can contract away from the casting cavity. The outer mold unit includes a bottom outer mold located below the inner mold unit and two side outer molds located on either side of the inner mold unit. The movable trolley is equipped with an outer mold adjustment assembly connected to the bottom and side outer molds. This invention reduces the process of moving the formwork during continuous casting of the box girder, facilitating continuous casting.

The invention relates to the field of high-speed railway bridge construction, in particular to a construction method for erecting a single-line-to-double-line last-span box girder of a high-speed railway, a lifting appliance assembly comprises a clamp and a crane carriage, the clamp is used for clamping, lifting and lifting a single-line box girder adjacent to the single line, and a hanging ring with the adjustable position is arranged at the lower end of the clamp; the abutment beam moving device is provided with a sliding seat used for supporting a single-line box beam adjacent to the single line, and a pull rope which pulls a hanging ring and can be wound and stored is arranged below the middle of the sliding seat. The position-adjustable hanging ring is used for determining that the traction points are located in the middle line of the lower end of the box girder, and then traction of the pull rope is used for guaranteeing that the traction points accurately fall in the middle of the sliding seats, so that a line formed by connecting the traction points at the two ends of the box girder (namely the middle line of the lower end of the box girder) coincides with and is parallel to the middle line of the pair of sliding seats. Therefore, relative friction sliding between the box girder and the sliding seat is avoided, and it is guaranteed that the box girder accurately moves to a girder falling point.

The utility model discloses an adjustable prefabricated box girder pedestal, including fixed base and telescopic pedestal. The adjustable prefabricated box girder pedestal, the top of fixed base is equipped with telescopic pedestal, and telescopic pedestal includes two foundation beams of symmetrical settings, and the opposite side of foundation beam all is fixedly connected with pad pole, and the end of pad pole away from foundation beam is commonly fixedly connected with the reinforcing beam, and the first guide rod is connected in the common equidistance sliding of reinforcing beam, and the bottom of foundation beam all is fixedly connected with mounting panel, and the linkage drive mechanism is equipped between mounting panel and fixed base, and the top of fixed base is equipped with telescopic pedestal, and two foundation beams on telescopic pedestal can be driven and adjusted interval through linkage drive mechanism cooperation mounting panel, wherein the process of foundation beam interval adjustment forms a support platform through pad pole, thereby can support bottom steel sheet, and cooperate foundation beam and fix bottom steel sheet and side edge formwork, thereby convenient adaptation different width prefabricated beam production.

The present application relates to the field of bridge construction, specifically to a double-hung basket hoisting construction device, the adjusting assembly comprises a sliding cross beam, a transverse jack and a longitudinal jack, the longitudinal jack is installed at the upper end of the double-hung basket, the other end of the longitudinal jack is connected to the sliding cross beam, a pair of oppositely arranged transverse jacks are arranged at the two ends of the sliding cross beam, and the front end of the double-hung basket is provided with a correction assembly, beneficial effects are that: the double-hung basket composed of double trusses is arranged, the support for hoisting the prefabricated part is realized, the strength of the hoisting support is improved, the transportation and positioning adjustment of the prefabricated part are realized by adjusting the float box and the traction rope, the positioning of the correction device is matched, the hoisting beam is accurately matched with the ear seat on the prefabricated part, the hoisting precision is improved, the prefabricated part is accurately matched with the box girder after hoisting, and therefore the efficiency and precision of bridge construction are greatly improved.