439 results about "Beam bridge" patented technology

The invention discloses a bridge structure optimization method based on BIM and a finite element method, and relates to the technical field of bridge structure optimization. According to the method, the finite element analysis model can be more accurately established, and the design precision is improved. Through finite element analysis and a digital simulation technology, structure response data is rapidly obtained, and design optimization is accelerated; the optimization of the final scheme is ensured by a multi-iteration optimization strategy, the extreme load response is predicted by introducing a machine learning algorithm, a high-risk area is identified in advance, and the overall performance is improved; based on a multi-scale analysis method, the durability and safety of the structure are comprehensively evaluated, weak links are identified, and long-term performance is guaranteed; meanwhile, the influence of environmental factors on material characteristics is considered, adjustment is performed according to climate data, the design scheme is closer to the actual environment, and durability is enhanced.

The invention discloses a hollow slab girder bridge maintenance decision-oriented hierarchical knowledge graph construction method, which comprises the following steps of: constructing a hollow slab girder bridge disease classification and maintenance decision general knowledge graph, combing disease types and evaluation indexes of a hollow slab girder bridge through cross-standard feature alignment and rule fusion, and defining each disease and the index thereof in a variable manner so as to construct a hollow slab girder bridge disease classification and maintenance decision-oriented hierarchical knowledge graph. The weight of each disease index is determined based on a fuzzy-Bayesian hybrid reasoning algorithm, and a complete general knowledge graph structure is formed; extracting disease information based on a detection report of a single bridge, endowing each disease with a maintenance suggestion by using a general knowledge graph, and forming a maintenance decision knowledge graph special for the bridge; and dynamically updating the special knowledge graph, and adjusting disease information and maintenance suggestions according to a subsequent detection report of the bridge to ensure timeliness and accuracy of the graph. According to the method, the problems that knowledge is dispersed and systematization is difficult in traditional hollow slab girder bridge maintenance decision making are solved, and scientificity and efficiency of bridge maintenance management are improved.

The invention relates to the technical field of hogging moment region calculation, in particular to a hogging moment region long-term rigidity prediction method for a steel-concrete composite beam bridge. The invention discloses a long-term rigidity prediction method for a hogging moment area of a steel-concrete composite beam bridge. Comprising the steps that a welding stud connecting piece degradation time-varying model and a concrete bridge deck degradation full-time-domain model under the corrosion-fatigue coupling effect are constructed according to test data, and a steel-concrete composite beam bridge hogging moment area rigidity degradation model, steel-concrete composite beam bridge hogging moment area long-term rigidity prediction and the like are constructed. In the process of predicting the rigidity of the hogging moment area of the steel-concrete composite bridge, the deterioration mechanism of a welding stud connector under the corrosion-fatigue coupling effect is considered, the pitting corrosion condition under the environment influence and the welding stud crack condition under the vehicle load influence are considered, the influence of bridge deck slab cracks is considered in the pitting corrosion condition, and the rigidity of the hogging moment area of the steel-concrete composite bridge is predicted. In addition, the mutual relation among the welding stud pitting corrosion influence, the welding stud crack influence and the bridge deck crack influence is considered, and the rigidity of the hogging moment area of the steel-concrete combined bridge is accurately analyzed.

The invention discloses a fabricated beam bridge finished product quality evaluation method fusing fuzzy reasoning and a neural network, and belongs to the field of comprehensive evaluation, and the method comprises the steps: constructing a fabricated beam bridge finished product quality intelligent evaluation system which comprises a first-level index and a second-level index; adopting a fuzzy number to describe quantitative and qualitative indexes, and constructing a fuzzy judgment matrix; calculating an initial weight vector by using an analytic hierarchy process and a defuzzification technology; calculating an improved regularization item balancing data driving and expert priori; and performing weight optimization and weighted summation on the parameters of each component by using a weighted neural network, and outputting a finished product quality score of the fabricated beam bridge. The invention aims to construct an intelligent evaluation system for the quality of the finished product of the fabricated beam bridge, realizes collaborative evaluation of expert knowledge and a data driving method by fusing a deep learning technology, improves the accuracy and robustness of the quality evaluation of the finished product of the fabricated beam bridge, and provides an efficient and reliable technical means for the intelligent evaluation of the quality of the fabricated beam bridge.

The invention discloses a method for calculating the flexural capacity of a prefabricated segmental girder bridge based on steel shear keys, and belongs to the technical field of fabricated prefabricated segmental girder bridges. According to the method, on the basis of the concrete plasticity theory, a theoretical stress model of bending plastic deformation of the prefabricated segmental girder bridge is constructed, a cracking bending moment calculation formula of the three-section type prefabricated segmental girder bridge is established, and design refinement and design efficiency are improved; based on the fact that the anti-bending bearing capacity of the joint of the segmental beam is mainly determined by deformation of a pressed area of a concrete top plate and limit stress of a steel strand, a calculation formula of the anti-bending bearing capacity of the three-section type prefabricated segmental beam bridge at the joint and the non-joint is provided; according to the method, the plastic deformation of the concrete and the bonding slippage effect of the reinforcing steel bars are considered, the bending bearing capacity of the three-section type prefabricated segmental girder bridge can be accurately calculated, and the calculation method is verified to be safe and reliable through comparison with an experimental value.

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 parameter optimization, and discloses a steel-concrete composite beam bridge prefabricated segment prestress tension parameter optimization method and system, and the method comprises the steps: obtaining a design BIM model, classifying prefabricated segments, constructing an initial digital twinborn model, and obtaining monitoring data; processing the monitoring data to obtain corrected data; comparing the corrected data with a model simulation result, and calibrating the model to generate a precise digital twinborn model; evaluating a multi-dimensional robustness index to construct a feature vector; generating a self-adaptive tensioning strategy sequence through a graph neural network in combination with the feature vector and the precise model; according to the method, intelligent optimization of the tensioning parameters is achieved, and the construction precision and the structural safety of the steel-concrete composite beam bridge are remarkably improved.

The invention relates to the technical field of steel-concrete composite beams, and discloses a steel-concrete composite beam bridge deck reinforcing device which comprises a sealing plate, a first hydraulic cylinder, a first supporting plate, a first polished shaft, a second supporting plate, a first support, a first rotating arm and a second hydraulic cylinder. In the using process, when one side of the top face of the web beam is subjected to overload pressure, the second supporting plate on the same side can be pressed downwards, then the first supporting plate on the same side is made to move downwards, and therefore the moving ends of the first hydraulic cylinders on the same side are made to return. And at the moment, hydraulic oil in the rodless cavities of the first hydraulic cylinders on the same side can enter the rodless cavities of the second hydraulic cylinders on the same side, and then the moving ends of the second hydraulic cylinders on the same side stretch out. And then, under the support of the first support on the same side, the first rotating arms on the same side can deflect towards the direction of the web beam. Due to the fact that hydraulic pressure is adopted as a power source, enough supporting force can be provided for the bottom face and the two side faces of the web beam, and then the anti-overturning performance is improved.

The invention discloses a sensor optimization arrangement method for vibration monitoring of a T-shaped bridge, which comprises the following steps of: firstly, preliminarily drawing up a measuring point group and determining an interested modal order through a finite element model and / or a modal result of the T-shaped bridge obtained by field measurement; then, based on a modal shape matrix of a bridge in a finite element model result, deriving a maximum diagonal element value of a corresponding MAC matrix and a trace of a Fisher information matrix, and increasing and decreasing the degree of freedom of the MAC matrix and the Fisher information matrix through a correction matrix so that the MAC matrix and the Fisher information matrix meet monitoring requirements; comprehensively considering whether the values of the two parameters are in the optimal range or not based on actual measurement and historical data; the measurement point group is the optimal arrangement mode of the vibration sensor if the measurement point group is in the optimal range, and the measurement point group is the optimal arrangement mode of the vibration sensor if the measurement point group is not in the optimal range, the correction matrix acts on the MAC matrix and the Fisher information matrix respectively, the corrected parameter values are compared, and the measurement point group under the optimal parameter value is taken as the optimal arrangement of the vibration sensor.

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 discloses a method for calculating the shear capacity of a joint of a prefabricated segmental girder bridge based on a steel shear key, and belongs to the technical field of fabricated prefabricated segmental girder bridges. On the basis of a concrete local pressure bearing theory and a maximum shear stress failure criterion, the concrete local pressure bearing strength is corrected, and a shear bearing capacity calculation formula of a single steel shear key is established; according to the method, a theoretical stress model of the steel shear keys is constructed, a joint shear bearing capacity calculation formula based on the steel shear keys under the construction state of the fabricated prefabricated segmental girder bridge and a joint shear bearing capacity calculation formula under the bridge forming state are provided, and design refinement and design efficiency are improved; assuming that the main compression area of the steel shear key is the front # imgabs0 # / 2 part, so that the shear bearing capacity of the single steel shear key can be calculated more safely; the shear bearing capacity of the fabricated prefabricated segmental girder bridge based on the steel shear keys can be accurately calculated, and through comparison with an experimental value, it is verified that the calculation method is safe and reliable.

The invention discloses a beam bridge anti-seismic weak part detection method and system, and relates to the technical field of bridge anti-seismic monitoring, and the method comprises the steps: S1, simulating the acceleration and displacement response of each section of a bridge under the action of seismic waves through numerical simulation, and obtaining a local dynamic response signal; s2, simulating stress distribution of each section of the bridge under the action of seismic waves by adopting a finite element analysis method according to the local dynamic response signal to obtain stress distribution characteristics of each section; s3, extracting a dynamic response change trend of a stress concentration region in the stress distribution characteristics of each section through time sequence analysis, and obtaining a weak section candidate region; according to the method and the system for detecting the anti-seismic weak part of the beam bridge, an efficient closed loop from local response to overall optimization is realized, and the safety and the stability of the bridge under the action of complex seismic waves are ensured.

The invention relates to the field of bridge construction, in particular to a turning and jacking integrated construction method and system for a T-shaped structure bridge without a closure segment, and the method comprises the following steps: S1, carrying out T-shaped structure construction in a full framing construction mode; s2, side pier construction is carried out, and jacking bracket devices are pre-buried on side piers; s3, adopting an intelligent swivel system, and monitoring the swivel operation of the T-structure bridge through a measurement monitoring system; s4, temporary buttresses are arranged on the side piers, and synchronous jacking of the main beam is conducted through a micro jack group; s5, after the main beam is jacked to reach the designed elevation, a support is installed, and then the beam is dropped; and S6, the temporary supporting system and construction auxiliary facilities are dismantled, and system conversion is completed. The construction period can be shortened, the construction quality is improved, the construction safety is enhanced, and the construction cost is reduced.

The invention discloses a load distribution method and system for multi-pier coordination of a scouring damaged beam bridge and a storage medium. The method comprises the steps that horizontal and vertical loads acting on a bridge superstructure are obtained; calculating a load distribution result of a vertical load acting on the upper structure of the bridge on the pier according to the counter-force influence line; calculating the horizontal load which acts on the upper structure of the bridge and is distributed to the pier by adopting an iterative method, namely calculating the pier top displacement according to the latest calculated horizontal load of the pier, calculating the equivalent stiffness according to the latest calculated pier top displacement, recalculating the horizontal load distributed to the pier according to the latest calculated equivalent stiffness, and calculating the horizontal load of the upper structure of the bridge according to the calculated equivalent stiffness. The pier top displacement is the pier top displacement of the pier-pile foundation under the conditions of scouring damage, flood load and vehicle load. According to the method, the influence of scouring damage, flood and vehicle load on load distribution is considered, and the accuracy of full-bridge bearing characteristic analysis is improved.

The invention belongs to the technical field of bridge engineering earthquake resistance, and particularly relates to a bridge bidirectional self-resetting earthquake-resistant device and method with a multistage earthquake-resistant function, the bridge bidirectional self-resetting earthquake-resistant device comprises an upper sliding cover plate and a lower fixing base, the upper sliding cover plate is provided with a convex block, the lower fixing base is provided with a groove, and the convex block is in sliding connection with the groove; when the support is normally used and the earthquake force is smaller than the elastic deformation force of the plate-type rubber support, the support is normally used through the shape of the plate-type rubber support, and when the earthquake force is larger than the elastic deformation force of the plate-type rubber support, the upper sliding cover plate and the lower fixing base slide relatively. When the earthquake force is continuously increased, the inclination angle formed by the protruding block of the upper sliding cover plate and the groove of the lower fixing base is used for resisting the earthquake force, and self-resetting of the main beam is achieved through the self-weight effect. A support sliding shock insulation mechanism is fully utilized, serious damage to bridge piers after an earthquake is avoided, meanwhile, residual displacement of the bridge after longitudinal and transverse earthquakes is reduced, beam falling is avoided, and the shock resistance toughness of the bridge under a large earthquake is improved.

The invention relates to an efficient assembly type steel-concrete composite beam bridge superstructure connecting structure and a construction method, and belongs to the technical field of bridge engineering. Comprising a prefabricated concrete bridge deck, a steel beam, an umbrella-shaped perforated steel pipe connecting piece, a high-strength hook, a wedge-shaped steel accessory, a pi-shaped metal part, an H-shaped high-strength steel accessory, a high-strength bolt and a nut. The wedge-shaped steel accessory is pre-buried in the transverse joint direction of the prefabricated concrete bridge deck slab through a pi-shaped metal part, the bridge deck slab in the transverse joint direction is fastened through an H-shaped high-strength steel accessory, and the H-shaped high-strength steel accessory and the wedge-shaped steel accessory are fastened through a high-strength bolt and a nut; the umbrella-shaped perforated steel pipe connecting pieces are welded to the steel beams, the high-strength hooks are pre-buried in the prefabricated concrete bridge deck in the longitudinal joint direction, the high-strength hooks and the umbrella-shaped perforated steel pipe connecting pieces are hooked tightly after the bridge deck is in place, longitudinal steel bars penetrate through the holes, in the bridge direction, of the umbrella-shaped perforated steel pipe connecting pieces, and finally high-performance grouting materials are poured in the longitudinal joints.

The invention discloses a beam bridge structure performance state evaluation method based on microwave full-field sensing, and the method comprises the following steps: S100, determining a monitoring point position according to a bridge structure form and a damage mechanism, laying corner reflectors, and completing the installation and positioning of microwave full-field sensing equipment; s200, sequentially transmitting, receiving and processing signals through the microwave full-field sensing equipment in the S100 to obtain response data of the structure; s300, establishing a finite element model for the bridge in the step S100, extracting theoretical response data of corresponding working conditions, and calculating static deflection, a transverse distribution coefficient and modal parameters of a bridge structure according to the actually measured data in the step S200; s400, comparing the structural static deflection, the transverse distribution coefficient and the modal parameter calculated in the step S300 with a threshold value calculated by a finite element, and if the data calculated in the step S300 exceed a theoretical threshold value range, identifying a damage grade and a damage position; the invention also discloses a corresponding evaluation system. Cost is reduced and detection efficiency is improved.

The utility model discloses a multi-span simply supported girder bridge old bridge jacking and stabilizing structure, which belongs to the technical field of bridge engineering, and is characterized by comprising an old bridge body, a fixing plate is arranged at the bottom of the old bridge body, a jacking structure is clamped on the inner wall of the fixing plate, a jacking frame is arranged at the top of the jacking structure, and the jacking frame is connected with the old bridge body. The front side and the rear side of the jacking frame are in bolted connection with stabilizing mechanisms, the surface of the jacking structure is sleeved with a reinforcing mechanism, and the inner wall of the reinforcing mechanism is movably connected with a limiting assembly. The problems that a jacking structure is prone to inclining, the debugging stability of the jacking structure during jacking is poor, and most jacking stable structures at present are not provided with real-time detection structures during use, so that displacement changes of a bridge during jacking are inconvenient to find in time are solved.

The invention discloses an existing concrete beam bridge crack diagnosis method based on an influence line sparse coefficient, which is characterized in that force method graph multiplication and a crack nonlinear damage function are substituted into an analytical solution for solving, and finite element simulation relates to respiration crack simulation. A nonlinear spring is adopted to simulate crack opening and perform grid division and encryption processing on the tip of the crack, bridge section rigidity change caused by the breathing crack is accurately simulated by constructing a crack rigidity damage function, and the model is introduced into an influence line analytical solution to obtain a nonlinear influence line of the cracked bridge. In combination with a sparse coefficient representation method, damage position and damage degree information is extracted from influence line data, and accurate positioning and quantitative evaluation of beam bridge section cracking are achieved; the method not only improves the accuracy and efficiency of damage identification, but also provides a reliable technical means for rapid detection and state evaluation of the existing beam bridge.

The invention discloses a construction method and device for intelligently adjusting prestress of a steel-concrete composite beam bridge deck slab. The construction method comprises the following steps: assembling and calibrating the bridge girder erection machine, installing the strain sensor and hoisting the steel beam, connecting the lifting and control device, applying a pre-lifting force to the steel beam, dynamically adjusting the lifting force by the central control system according to data of the sensor in the whole process of installing the bridge deck slab, and locking the lifting force to construct cast-in-place concrete after the bridge deck slab is installed. And after the strength is reached, releasing the lifting force to generate preset pressure stress, and the like. The device comprises a bridge erecting machine, a plurality of lifting and control devices, a monitoring system and a central control system. The lifting force is dynamically adjusted through multi-sensor cooperative monitoring and the central control system, the stress of the steel beam and the bridge deck can be effectively balanced, the construction efficiency is improved, the construction quality is guaranteed, the bridge structural performance is enhanced, the generation of cracks of the bridge deck is reduced, and the method is suitable for construction of various steel-concrete composite beam bridges.

The invention relates to the technical field of crack resistance detection, in particular to a road steel-concrete composite beam bridge deck pavement crack resistance detection method and system which comprises a support, a test piece, a plurality of loading units and a bottom supporting and adjusting assembly. The bottom supporting and adjusting assembly comprises two bottom side edge supporting pieces, a bottom center supporting piece, two moving blocks and a plurality of connecting rods, the bottom side edge supporting pieces are driven to move through the moving blocks, the bottom center supporting piece is driven to move upwards and abut against and support the lower portion of the test piece through the action of the connecting rods, and meanwhile the bottom side edge supporting pieces on the two sides move downwards; then, only the lower central area of the test piece is supported, and at the moment, the two sides of the test piece can be subjected to a loading test through the upper loading unit; therefore, loading tests on the center and the two sides of the test piece can be carried out, rapid adjustment can be carried out in a linkage mode during switching, test data can be enriched, the test efficiency can be guaranteed, and crack resistance detection is more comprehensive.

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 utility model discloses a steel structure reinforcing structure of a stone beam bridge, and relates to the field of buildings, the steel structure reinforcing structure of the stone beam bridge comprises a broken bridge I and a broken bridge II after the stone beam bridge is broken, the lower ends of the broken bridge I and the broken bridge II are symmetrically and fixedly connected with cap beam stones, and the bottoms of the cap beam stones are fixedly connected with vertical pilasters fixed on the ground; by means of the stabilizing mechanism and the detachable mechanism, on the premise that it is guaranteed that the structure of the reinforced stone flat beam bridge is safe and reasonable, the stone flat beam bridge which is completely fractured originally is utilized, and the stone flat beam bridge which is completely fractured originally is utilized; according to the technical scheme, on the premise that the structure safety is guaranteed, the value of the cultural relic component is not damaged as much as possible, the maximum possibility is provided for repairing the cultural relic component through possible technology updating in the later period, meanwhile, during reinforcement or disassembly, the tedious reinforcement process can be simplified, and unnecessary time and labor consumption in the repairing process can be reduced.

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.

The invention belongs to the technical field of bridge damping, and particularly relates to a bridge two-way anti-seismic connection damping device which comprises a plurality of main beams. The bottom of the main beam is fixedly connected with a pier; a pair of piers is arranged at the bottom of the main beam; a damping assembly is arranged at the top of the main beam; the top of the main beam is connected with a bridge plate through a damping assembly. A plurality of groups of bridge plates are arranged at the top of the main beam; the outer side wall of the bridge pier is fixedly connected with a first fixing ring; a damping rod is hinged to the bottom of the first fixing ring; a plurality of groups of damping rods are arranged at the bottom of the first fixing ring and are uniformly distributed at the bottoms of the damping rods; according to the step, through the arrangement of the first fixing ring, the damping rod and the second fixing ring, the damping rod restrains shaking of the bridge pier, the situation that external vibration is transmitted to the bridge to cause shaking of the bridge plate and the main beam is reduced, the situation that the bridge pier is damaged due to the fact that the bridge pier swinging shearing force is increased is reduced, and the shock resistance of the bridge is improved.

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 a test method for judging whether a damaged T-beam bridge target can meet the passing requirement of an armored vehicle, and belongs to the field of test and evaluation. According to the method, factors such as brake, wheel track and wheel base of the armored vehicle are considered, an equivalent loading block is used for simulating the armored vehicle, and a loading test is carried out at the most unfavorable position of a T-beam bridge target through graded load loading. If the bridge collapses in the loading process, taking a lower level of load to represent the target traffic capacity of the damaged T-beam bridge; and if the bridge is not collapsed, loading a larger level of load until the load is loaded to the maximum tonnage of the simulated armored vehicle, and finally judging whether the T-beam bridge target can meet the passing of the armored vehicle or not. According to the test method, the equivalent loading block is used for replacing the armored vehicle, a graded load loading mode is used, the traffic capacity of the damaged T-beam bridge target is obtained, the test cost is saved, safety risks are avoided, and accurate judgment can be provided for whether the military armored vehicle passes through the damaged T-beam bridge target or not.