203 results about "Beam bridge" patented technology

The present invention proposes an intermediate diaphragm-free, suspended formwork-free, and negative moment tooth block-free beam bridge, and a design method thereof. The beam bridge includes prefabricated main girders, a wet joint, lower structures, and pier cap transverse beams above the lower structures. The concrete deck slabs of adjacent prefabricated main girders are connected by the wet joint. The design method of the above beam bridge includes the following steps: S1, initial design of the main girders; S2, calculation of the non-uniform deflection of the main girders and the indirect transverse stress of the deck slabs; S3, calculation of the direct transverse stress of the deck slabs; S4, crack resistance verification of the deck slab; S5, optimization of bridge parameters to reduce the stress on the driving surface; S6, completion of the beam bridge design. The beam bridge and its design method effectively solve the problem that the existing intermediate diaphragm-free beam bridge is prone to longitudinal cracking at the joints, and realize the suspension tension without the wet joint suspended formwork of the deck slab and the negative bending moment tendon, and have better mechanical properties and better economic, environmental and social benefits, which can facilitate the promotion and application of such bridges in various types of highways , railways and municipal engineering.

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 utility model provides a double-beam bridge crane with double lifting points, which comprises a bridge frame and a crane carriage arranged on the bridge frame, two groups of lifting winding drums are arranged on the crane carriage, the lifting winding drums are connected with a lifting appliance through steel wire ropes, and two ends of two trolley end beams are respectively provided with a trolley travelling mechanism; winding drum supports are arranged on the upper sides of the two trolley end beams respectively, lifting winding drums are installed on the two winding drum supports respectively, the middles of the two trolley main beams are connected through a supporting beam, a motor and a speed reducer are arranged on the upper side of the supporting beam, and the speed reducer is located between the lifting winding drums and connected with the two lifting winding drums to form a linear shape. The output end of the motor is connected with the input end of the speed reducer, and the output end of the speed reducer is connected with the two lifting winding drums. According to the double-lifting-point double-beam bridge type crane, the two sets of lifting winding drums are synchronously driven through the motor and the speed reducer, synchronous operation of the lifting winding drums is fully guaranteed, and the stability of the lifting winding drums is fully guaranteed by arranging the supports at the two ends of the lifting winding drums correspondingly.

The invention discloses a new and old beam UHPC transverse connection bridge floor structure and a calculation method and construction method thereof.The new and old beam UHPC transverse connection bridge floor structure comprises an old main beam, a new main beam, an old bridge floor concrete pavement layer, a new main beam bridge floor concrete pavement layer, a UHPC connecting plate, a stainless steel plate and a debonding layer structure, the new main beam is arranged on the side edge of the old main beam in parallel, and a set distance is reserved between the new main beam and the old main beam; the old bridge deck concrete pavement layer and the new main beam bridge deck concrete pavement layer are respectively paved at the tops of the old main beam and the new main beam, and a reserved connecting groove is formed at the transverse butt joint of the old main beam and the new main beam; the two ends of the stainless steel plate are arranged at the tops of the new main beam and the old main beam correspondingly, and the UHPC connecting plate is poured into the reserved connecting groove. And debonding layer structures are arranged between the UHPC connecting plates and the new and old main beams, the outer side bottoms of the debonding layer structures are arranged at the tops of the stainless steel plates, and the inner side bottoms of the debonding layer structures are supported at the tops of the new and old main beams. By additionally arranging the debonding layer, the transverse calculation length of the UHPC connecting plate is prolonged, reasonable weakening of the transverse connecting rigidity is achieved, and the transverse rigidity is dynamically adjusted by adjusting the plate thickness and length of the UHPC connecting plate.

The invention belongs to the technical field of sail-shaped cable-stayed bridge construction, and relates to a long and thin structure arched steel tower installation method which comprises the steps that a bridge lower structure and a main tower are constructed, and an auxiliary tower root embedded section, a top connecting piece and related construction components are embedded in the main tower; during main tower construction, an attached tower fixing section and a main beam are synchronously installed, and the attached tower fixing section is fixedly connected with the main tower through welding and a steel truss set; a support is erected on a girder bridge floor, tower-attached sections are assembled according to the inverted arch posture, the pre-bias value and the pre-camber are preset, and rotating hinges are installed; a vertical rotating cable, a back cable and a cable wind cable which are made of steel strands are arranged, and testing is completed; one-time vertical rotation welding of one section of the attached tower is achieved through synchronous traction of a continuous jack, and then secondary vertical rotation is conducted on the whole section of the attached tower; after vertically rotating in place, welding and fixing, and dismounting related equipment and a bracket; the invention aims to solve the problems of high overhead operation risk, difficulty in control of construction precision, large temporary support investment, low work efficiency and insufficient adaptability of a traditional mounting method.

This utility model discloses a track transport tool for a rock face bridge girder machine, comprising a base, symmetrical side plates, L-shaped ear plates, long shafts, pin shafts, bearing I, bearing II, long and short sleeves, and bolts and nuts. The base is fixed to the side plates, with ear plates at the front and rear. Two long shafts pass through the side plates and are locked in place. The long and short sleeves and bearing I are fitted onto the joint of the long shafts to form rolling supports. The pin shaft passes through the ear plates and the bearing II in the middle, and is locked with nut II to achieve swinging or guiding. The number of components can be increased or decreased as needed. The overall structure is symmetrical and the force is balanced. This tool is easy to assemble and can be quickly positioned and installed on a rock face bridge girder machine. The rolling supports reduce friction, and the ear plate-pin connection improves lateral stability, making it suitable for heavy-load track transport and extending the tool's service life.

The utility model discloses a double-beam bridge type five-axis machining center, which relates to the field of five-axis machining centers and comprises two cross beams, reinforcing ribs are welded at the tops of the two cross beams, a vertical beam is slidably mounted on a front end plate of the reinforcing ribs at the front end, and a sliding frame is vertically slidably mounted on a front end plate of the vertical beam. A sleeve is installed at the front end of the sliding frame, an X-axis moving mechanism is installed on the two cross beams, a Y-axis moving mechanism is installed on the vertical beam, and a Y-axis rotating mechanism which penetrates into the sleeve and extends to the position below the sleeve is installed above the sleeve. And a Z-axis rotating mechanism which extends into the sleeve and is matched with the Y-axis rotating mechanism is mounted at the rear end of the sleeve. According to the utility model, the Y-axis rotating mechanism and the Z-axis rotating mechanism are arranged, so that the two axis rotating mechanisms do not interfere with each other in the rotating process, and a complicated conductive slip ring loop does not need to be designed, thereby reducing the manufacturing cost.

The utility model discloses a device for dismantling an overline simply supported girder bridge by rotating, which relates to the technical field of bridge dismantling, and comprises a horizontal positioning spherical hinge, an arc-shaped slideway, a plurality of supporting legs, a plurality of supporting legs and a plurality of supporting legs, after the rotating body section and the support are cut and separated, the supporting foot and the horizontal positioning spherical hinge can support the rotating body section, the integrated connecting mechanism is integrally connected with the rotating body section, the temporary cable bent tower is arranged on the rotating body section, and the rotating body mechanism is used for driving the rotating body section to move in the direction away from a line along the arc-shaped sliding way. The overline simply supported girder bridge is split into the rotating body section and the non-rotating body section, the supporting mechanism is reformed through the horizontal positioning spherical hinge, the annular sliding way and the supporting foot, the rotating body mechanism drives the rotating body section to move in the direction away from a line along the arc-shaped sliding way to the position where the line is not affected, and then disassembly and disassembly work is conducted. Lines below the bridge can be completely avoided in the construction process.

The invention discloses an integrated tree model-based intelligent evaluation method for the construction quality of a fabricated prefabricated beam bridge, and belongs to the field of bridge engineering quality evaluation, and the method comprises the steps of constructing a three-level quality evaluation index system of beam bridge construction; according to the actual measurement data of the second-level indexes, obtaining standardized characteristic data through mixed index preprocessing; a random forest model, an XGBoost model and a LightGBM model are constructed, and model training and hyper-parameter optimization are carried out; presetting model performance evaluation indexes, and selecting one model with the optimal comprehensive performance from the three candidate models as a construction quality evaluation model; and obtaining a construction quality grade evaluation result according to the construction quality evaluation model and the standardized feature data of the to-be-evaluated T-beam bridge. According to the method, intelligent evaluation of the construction quality of the fabricated T-beam bridge is realized, the limitation of traditional subjective weighting is eliminated, and the objectivity and accuracy of evaluation are remarkably improved by learning a historical data rule and continuously optimizing.

The application provides a structure multi-form swivel construction error elimination method, belongs to the field of bridge construction error control, and is used for solving the problems that the structure multi-form swivel construction error elimination method in the related art has single-link optimization, poor adaptability, weak cooperation and cannot meet the accurate error control of beam bridges, arch bridges and cable-stayed bridges in horizontal swivel, vertical swivel and combined swivel. The method first identifies the bridge type and the swivel form, constructs a full-link framework containing multiple units and cross-layer cooperation, generates an adaptive physical field module and anti-noise processes data, dynamically optimizes pre-correction instructions after multi-agent stage prediction, and forms a closed loop through sensitivity-driven iterative optimization. The method can realize accurate error control of multi-form swivel, and improve adaptability and cooperation.

The application discloses a steel-concrete composite beam bridge negative bending moment area rigidity degradation analysis method and system. The method first establishes a bridge deck deterioration numerical simulation model, fits the quantitative relationship between the deterioration parameters and the rigidity, and forms a bridge deck deterioration rigidity evaluation model; then, taking the steel-concrete relative slip as an index and the concrete rust expansion cracking as a boundary, the welding bolt reduction coefficient is determined through simulation and test in stages, and the steel-concrete collaborative degradation rigidity evaluation model is formed in combination with the interface slip reduction; then, a corrosion-fatigue coupling test is carried out on a scaled beam test piece, a multi-component deterioration rigidity degradation model is proposed by combining the two types of models, and a reliable calculation model is formed after numerical verification; finally, a deterioration parameter time-varying evolution model is established, the rigidity at different service times is calculated, a full-time domain calculation framework is constructed, and the precise analysis and full-time domain evaluation of the steel-concrete composite beam bridge negative bending moment area rigidity degradation are realized.

The invention relates to the technical field of earthquake resistance of bridge engineering, and particularly discloses a railway beam bridge damping system based on metal damper coordination and a design method.The railway beam bridge damping system adopts direct displacement design based on equivalent linearization and comprises the steps that firstly, shock insulation displacement and an initial equivalent damping ratio are set as design parameters; the design displacement target is achieved within the reasonable range of the two parameters, accurate calculation can be conducted according to specific structural requirements, blind accumulation only based on the number of existing dampers in previous design is avoided, and design pertinence and scientificity are effectively improved. On the premise that different metal dampers are combined, the independent design of the equivalent damping ratio and the equivalent rigidity is achieved, the flexibility of the damping design is improved, the damping design of a common railway beam bridge is optimized, and the cost of the damping device is reduced.

The utility model discloses a box-type composite girder bridge, which relates to the technical field of bridges, and particularly comprises a double-steel-plate bridge deck, a steel plate bridge deck and a steel plate bridge deck, a support body is arranged between the panel and the back plate and is used for connecting the panel and the back plate; a pouring hole is formed in the surface of the face plate and used for filling a cavity between the face plate and the back plate with concrete. The open end of the groove-shaped steel beam is relatively and fixedly connected with the back plate of the double-steel-plate bridge deck; according to the box-type composite girder bridge, the double-steel-plate bridge deck is adopted, the cavity for filling concrete is reserved inside, the box-type composite girder bridge has the advantages of a concrete bridge deck and a steel bridge deck, the span limitation of the girder bridge is reduced, the box-type composite girder bridge meets the economical efficiency of a larger span range, meanwhile, the groove-shaped steel beams and the double-steel-plate bridge deck are directly fixed, production can be conducted in a factory, and the production cost is reduced. The problem that the construction speed and quality of a construction site are difficult to guarantee is solved.

The utility model relates to the technical field of steel-concrete composite beam bridge deck slab construction, in particular to a reverse hanging formwork structure for a steel-concrete composite beam cast-in-place bridge deck slab. The reverse hanging formwork structures are arranged on the flange portion of a steel-concrete composite beam cast-in-place bridge deck slab, the flange portion of a steel beam, the interior of a steel beam box body and the position between every two adjacent steel beam box bodies. The reverse hanging formwork structure is provided with a bamboo plywood bottom die; a plurality of longitudinal beam square pipes perpendicular to the bamboo plywood bottom die are arranged below the bamboo plywood bottom die; the longitudinal beam square tube is supported at the upper part of the lower cross beam; batten plates are fixed at at least one end of the lower cross beam; the batten plates are provided with opposite-pull screws used for connecting the batten plates and the bridge deck slab into a whole. A screw rod sleeve is sleeved on the opposite-pull screw rod; the screw rod sleeve is fixedly welded at the end part of the top plate of the steel beam; a positioning steel pipe used for being pressed and welded to the end face of the top plate of the steel beam is further welded to one side of the screw sleeve. The utility model has the characteristics of simple processing, convenient installation and disassembly, high stability, and adjustable thickness of concrete at the transition section of the flange part.

The invention relates to an anti-wind lifting railway T-beam bridge cable trough RPC cover plate fixing structure which comprises a U-shaped groove, a vertical connecting device and an RPC cover plate. A strip-shaped hoisting hole is formed in a bottom plate of the U-shaped groove; the vertical connecting device comprises a limiting bottom plate and a screw rod, the limiting bottom plate is strip-shaped, and the bottom end of the screw rod is fixed to the top surface of the limiting bottom plate; after the limiting bottom plate is inserted into the hoisting hole, the limiting bottom plate is rotated to be perpendicular to the hoisting hole, so that the limiting bottom plate is clamped below the bottom plate of the U-shaped groove; bolt holes are formed in the RPC cover plate, and after the RPC cover plate covers the top of the U-shaped groove, the screws are upwards inserted into the bolt holes of the RPC cover plate and fixed. The special rectangular pressure relief notch is designed in the structure, the aerodynamic lift force can be remarkably reduced, meanwhile, the path that strong wind is poured into the U-shaped groove to impact the bottom of the cover plate is blocked by means of the plugging function of the stainless steel component, and the possibility that the cover plate is wholly turned over is eradicated from the physical mechanism through mechanical anchoring provided by the bolts.

The invention relates to the technical field of hoisting machinery, and particularly provides a non-parallel track single-beam bridge crane which comprises a main beam, a driving end beam and a follow-up end beam, a movement mechanism is mounted on the main beam, an electric hoist is mounted on the movement mechanism, and a first walking trolley and a second walking trolley are mounted on the main beam; the driving end beam and the follow-up end beam are distributed on the left side and the right side of the main beam on the same horizontal plane in an unparallel mode, a first guide rail is arranged at the upper end of the driving end beam, a second rail is arranged at the upper end of the follow-up end beam, and an included angle smaller than 90 degrees exists between a walking guide extension line of the first guide rail and a walking guide extension line of the second rail. Through the design of the non-parallel end beams and a rotating self-adaptive mechanism of the connecting part, the crane can be directly mounted and stably run on a non-parallel track of a non-rectangular workshop such as a triangular workshop, the track of the workshop does not need to be transformed, and the space utilization rate and the economic benefit of the irregular workshop are remarkably improved.

The application belongs to the technical field of bridge construction, and is a beam bridge load test method based on time history curve. The method firstly carries out static load test, and then arranges test vehicles at key parts of the test bridge surface by using a step loading mode, and measures deflection points and strain points. Then, the static load test efficiency is calculated through the bridge static load test. According to the step loading mode and the static load test efficiency, a multi-working-condition bridge model is established by using a finite element method to collect time history curves. Finally, dynamic load test is carried out, control sections of each span of the bridge are selected as test sections, and strain fluctuation amplitude, impact coefficient and the like are measured through the dynamic load test. According to the test data, the stress state of the structure under dynamic load is analyzed. The application combines static load test and dynamic load test, can reflect the working performance of the bridge structure under design load, and has high reliability.

The application discloses a modified eccentric compression method considering torsional constraint stiffness of end cross beams. The steps are as follows: (1) obtaining relevant parameters of the beam bridge according to engineering data; (2) calculating the torsional constraint stiffness of the end cross beams to the main beam; (3) calculating the load transverse distribution coefficient at the fulcrum point through the lever principle method, and the single-web section main beam and double main beam bridge are calculated by using a single beam model, and the double-web three main beam and more main beam bridges with multiple pieces are calculated by using a double beam model; (4) calculating the load transverse distribution coefficient of the main beam in the longitudinal bridge direction at any position by the modified eccentric compression method considering the torsional constraint of the beam end; (5) considering the change of the load transverse distribution along the longitudinal bridge direction for the concentrated load, taking the load transverse distribution coefficient at the midspan position for the uniformly distributed load, and then calculating the load effect. The method considers the elastic support of the stiffness of the end cross beam to the torsional deformation of the main beam, and provides a new high-precision method for the load transverse distribution calculation of the box section beam bridge.

The utility model relates to the technical field of bridge engineering machinery, and discloses a span beam conveying device for beam bridge construction, which mainly comprises at least two bases, at least two strip-shaped steel rails and a transfer cart, the bases are arranged on different beams and provide a foundation for movement of the transfer cart; the strip-shaped steel rails are horizontally arranged on the base in parallel and are connected with the base to form a moving track of the transfer cart; the transfer cart is movably arranged on the strip-shaped steel rails and used for transporting the beam span safely and efficiently. According to the utility model, the problem of beam bridge construction in the prior art is effectively solved, and efficient, safe and accurate transportation of a beam span is realized through the span beam conveying device. Meanwhile, the device is reasonable in design and easy to operate, and has high practicability and wide application prospects.

The present application relates to the technical field of bridge health monitoring and detection, and discloses a prefabricated assembled beam bridge longitudinal damage rapid diagnosis method, which comprises the following steps: collecting actual structure parameters of a bridge, establishing a bridge finite element calculation model for calculating a theoretical strain influence line; arranging strain measuring points at the longitudinal midspan of the two outer side beams and the middle beam of the prefabricated assembled beam, and performing a pseudo-static loading test; extracting the strain of the beam bridge strain measuring points, fitting and drawing a strain influence line; calculating the total strain meters of the two outer side beam strain measuring points; calculating the total strain meter change amplitude ΔS of the two outer side beam measuring points; establishing a ΔS column chart of the two in the same coordinate axis, and comparing with a longitudinal damage qualitative diagnosis graph system to obtain a qualitative diagnosis result. The prefabricated assembled beam bridge longitudinal damage rapid diagnosis method has the advantages of short diagnosis time, no interruption of traffic, improved economy, realization of rapid comprehensive diagnosis of the prefabricated assembled beam bridge longitudinal damage, and improved diagnosis accuracy.

The utility model provides a prestress reinforcing device of a connecting part for widening a T-beam bridge, and relates to the technical field of bridge structure construction. The outer sides of the two T-shaped beams are each provided with a fixing frame through expansion screws. A first supporting frame is installed on the outer side of the fixed frame located on the left side. A second supporting frame is installed on the outer side of the fixed frame located on the right side. Two reinforcing plates are symmetrically installed on the front side and the rear side of the first supporting frame and the front side and the rear side of the second supporting frame. And two locking bolts are mounted at the left ends and the right ends of the two reinforcing plates. According to the device, more labor is saved during installation, the first supporting frame and the second supporting frame can tightly abut against expansion screws, the falling condition is avoided, and the use safety is improved.

The invention provides a reinforcing structure for additionally arranging an anti-collision guardrail on a hinged plate girder bridge and a rapid construction method of the reinforcing structure, and relates to the technical field of municipal infrastructure, the reinforcing structure comprises a plurality of hollow plate girders, a beam top pressure-bearing steel plate and a beam bottom anchoring steel plate, hinge joints are formed in the adjacent hollow plate girders, and vertical mounting holes are formed in the length directions of the hinge joints; beam top pressure-bearing steel plates are arranged on the upper surfaces of the hollow plate beams, beam bottom anchoring steel plates are arranged on the lower surfaces of the hollow plate beams, high-strength split bolts penetrate through the beam top pressure-bearing steel plates, the vertical mounting holes and the beam bottom anchoring steel plates and are tightened and fixed through fixing assemblies, and anti-collision guardrails are additionally arranged on the beam top pressure-bearing steel plates. According to the method, the procedure of planting steel bars and drilling holes in the plate beam is thoroughly avoided, the risks of damaging the prestressed steel bars and weakening the effective section of the main beam are fundamentally eliminated, the structural integrity and bearing capacity of an original bridge are protected to the maximum extent, the core reinforcing component can be prefabricated in a factory, construction is fast and efficient, and comprehensive benefits are remarkable.

This invention belongs to the field of bridge erection technology and relates to a single main beam bridge erection machine, comprising: a main beam, adopting a single rectangular frame structure, with a stainless steel track on its lower chord; a leg system, including a front main leg, a middle main leg, and a rear main leg distributed longitudinally along the main beam, each leg having height adjustment, rotation, and lateral movement functions to adapt to different construction conditions, and cooperating with the lower chord track of the main beam through clamping and driving mechanisms to realize the main beam passing through the span; and a crane system. The advantages of this invention are: during beam erection, the front main leg is flipped and folded using a hydraulic telescopic cylinder, the beam transport vehicle transports the beam to the designated position, and the crane completes the hoisting and precise lowering of the beam. This equipment adopts a single main beam structure combined with a modular leg system, resulting in a simple and compact structure; remote control operation enables coordinated operation of various mechanisms, leading to high construction efficiency; the legs are adjustable in height and position, and the crane is equipped with a lateral movement mechanism to adapt to different spans and working conditions.

The utility model relates to a concrete box girder bridge reinforcing structure for a large longitudinal slope girder bridge, which comprises a box girder main body and flanges, and the flanges are fixedly connected to the left side and the right side of the box girder main body. According to the concrete box girder bridge reinforcing structure for the large longitudinal slope girder bridge, by arranging the reinforcing plates, the upper end and the lower end of the inner wall of the box girder main body have high stability, then by arranging the first notches, the anchoring parts and other parts, high supporting performance can be generated between the two reinforcing plates, and the inner space of the box girder main body can be effectively supported and fixed; by arranging the auxiliary supporting plates, the box girder main body can transmit part of pressure to the reinforced steel plates on the two sides, then the pressure borne by the box girder main body is weakened, the service life of the box girder bridge is prolonged, and finally by arranging second notches, fixing anchor plates and prestressed steel bars, flanges on the two sides can be stably connected with the box girder main body; according to the design, the bearing capacity of the flange can be improved, and the stress state of the flange is improved.

The utility model relates to a fireproof protection technology of a girder bridge, in particular to a fireproof protection structure of a box-type steel box girder bridge, which comprises a steel box girder (1) and is characterized by further comprising protection pipes (2), the protection pipes (2) are fixedly attached to all side faces of the steel box girder (1) through respective side walls in a criss-cross mode, and inner cavities of the protection pipes (2) are communicated with one another. Independent water storage units and a through water flowing channel are arranged in the protection pipe (2), and the water flowing channel of a box body unit with an upward opening is formed above each water storage unit in the protection pipe (2) in the horizontal direction; the water storage units in the protection pipe (2) in the vertical direction and the side wall of the protection pipe (2) form the S-like folding water flowing channel. The safety guarantee effect is lasting and effective, and the risk resistance of a bridge system is improved.

The application relates to a steel simply supported beam bridge prefabricated modular bridge deck continuous device and a pier top seamless construction method, which comprises an L-shaped rib, a top surface connecting steel plate, a side surface connecting steel plate, double-arch steel pipes, prestressed tendons, anchorage devices, connecting steel bars, structural steel bars and hexagonal bolts; the prestressed tendons are anchored by the anchorage devices after being tensioned at intervals between the horizontal two sides of the double-arch steel pipes; the front and rear ends of the double-arch steel pipes are welded with the top surface connecting steel plates and are welded with the connecting steel bars on the sides; the double-arch steel pipes are arranged on a cement mortar leveling layer on the upper surface of a main beam and are transversely spliced through the top surface connecting steel plates, the side surface connecting steel plates and the hexagonal bolts. The application has the beneficial effects that the double-arch structure is adopted at the beam joint, the upper part of the double-arch steel pipes can be better compressed when the upper part of the main beam is deformed in tension, the safety coefficient of the double-arch structure is greatly increased compared with that of a single-arch structure, and the double-arch structure can better resist the deformation influence caused by temperature stress.

The utility model belongs to the technical field of hoisting equipment, and particularly relates to a trolley traveling mechanism of a double-beam bridge crane. Comprising a hoisting mechanism arranged above two cross beams, electric guide rails are fixedly mounted at the tops of the two cross beams, sliding blocks are slidably connected to the two electric guide rails, moving blocks are fixedly mounted at the tops of the two sliding blocks, a mounting box is arranged between the hoisting mechanism and the cross beams, and two cross bars are fixedly mounted at the bottom of the mounting box; the two transverse rods are provided with scale marks, the two transverse rods are connected to the two moving blocks in a penetrating mode respectively, two connecting legs are fixedly installed at the bottom of the hoisting mechanism, the bottoms of the two connecting legs extend into the installation box and are jointly and fixedly provided with a bearing plate, and the bearing plate makes contact with the inner wall of the bottom of the installation box. The hoisting mechanism mounting box can be mounted on cranes with different guide rail distances, hoisting mechanisms with different sizes can be quickly mounted in the mounting box for use, and the application range is wide.

The utility model relates to a double-beam bridge crane for hoisting pipe fittings, comprising a double-beam bridge crane body, the double-beam bridge crane body comprising two main beams, a hoist trolley is installed between the two main beams, a hoisting mechanism with a steel wire rope and a lifting hook is installed on the hoist trolley, a top plate is also installed on the hoist trolley below the main beams, the steel wire rope of the hoisting mechanism penetrates through the top plate, a hanger is hung on the lifting hook of the hoisting mechanism, a vertically distributed foldable telescopic arm is installed between the two sides of the hanger and the top plate; the hanger is a rectangular frame, and a plurality of clamping positioning devices are installed on the hanger, each clamping positioning device comprises a vertically installed and telescopic compression mechanism on the hanger, a lifting rope is symmetrically installed on the hanger outside the two sides of each compression mechanism, and a clamping mechanism is installed on each lifting rope, the utility model can reduce the swing amplitude of the hanger; on this basis, the swing amplitude of the pipe fittings during hoisting can be reduced to reduce the risk of pipe falling.

The invention relates to the technical field of bridge inspection equipment, and discloses a channel beam bottom inspection system and method.The channel beam bottom inspection system comprises an inspection vehicle and a steel beam, a plurality of walking supports in a rectangular array are arranged on the inner side of the steel beam, and the inspection vehicle comprises an electrical control system, an upper maintenance platform, a lower maintenance platform and an end maintenance platform; end maintenance platforms are hinged to the two ends of the lower maintenance platform in the length direction of the lower maintenance platform, and a plurality of walking mechanisms are arranged on the two sides of the bottom of the upper maintenance platform. According to the channel beam bottom inspection system and method, design is scientific and reasonable, installation and maintenance are convenient and fast, engineering investment and labor cost are reduced, the overhaul efficiency and continuity of a multi-span double-amplitude channel beam are greatly improved, the bridge inspection requirement of multi-pier-span form change is completely met, the remarkable engineering application value and the wide market prospect are achieved, and popularization and application are facilitated. And reliable technical support is provided for safe operation and maintenance of the channel beam bridge.

The utility model discloses a main beam structure of a double-beam bridge crane, which relates to the technical field of double-beam bridge cranes and comprises two main beam structures, inserting components are respectively arranged on the left sides of the front and rear ends of the main beam structures, and connecting components are respectively arranged on the right sides of the front and rear ends of the main beam structures. Reinforcing steel plates are arranged on the upper sides and the lower sides of the adjacent ends of the two main beam structures correspondingly, two reinforcing pieces are arranged on the upper sides and the lower sides of the main beam structures correspondingly, and two first fixing bolts are arranged at the left ends and the right ends of the opposite faces of the two main beam structures correspondingly. A plurality of second fixing bolts are arranged at the upper ends and the lower ends of the two reinforcing steel plates correspondingly. The two adjacent main beam structures are connected through the inserting assemblies and the connecting assemblies in the two adjacent main beam structures, then the connecting position of the two adjacent main beam structures is covered through the two reinforcing steel plates, and the two adjacent main beam structures are installed and fixed through the first fixing bolts and the second fixing bolts, so that disassembly and transfer are convenient.