3101results about "Bridge strengthening" patented technology

The invention belongs to the technical field of viaduct renewal, and discloses water jet forcible entry equipment and a forcible entry method.The equipment comprises a main body structure, an auxiliary supporting structure, a spray head structure and a control structure, the main body structure is movably arranged on the road surface, and the auxiliary supporting structure is arranged on the side, away from an anti-collision wall, of the main body structure; the supporting rods are driven to rotate through stretching and retracting of the linear driving mechanism, so that the auxiliary supporting wheels abut against the ground, anti-toppling supporting force is provided for the main body structure, the situation that the equipment topples due to the counter-acting force of water flow is avoided, the stability of the whole equipment in the moving process is ensured, and the operation danger is reduced. The spray head structure comprises a mounting base and a spray head, the mounting base is movably arranged at the end of the main body structure, and the spray head is rotatably arranged on the mounting base so as to achieve multi-angle forcible entry of the anti-collision wall. The control structure is arranged on the main body structure and can control movement of the main body structure, movement of the mounting base and rotation, start and stop of the spray head, and intelligent operation is achieved.

A method for rapid and safe construction and intelligent monitoring and controlling of continuous arch bridges, which using a single-arch rib construction method, when installing a new arch rib segment, the clasp cable is immediately extended, and then using an intelligent control cable to ensure that the pier and anchorage tower are in a balanced state. The newly installed segment is no longer in a cantilever state, and the loading on the flange is very small, resulting in a small change in the tension force for the clasp cables of the previous segments. The present invention saves more than half of the clasp cable usage, reduces the number of transverse movements of the cable crane system, and significantly shortens the construction period. The construction method which using intelligent control cables to balance the unbalance loading on the middle pier, could be applied to the construction of continuous arch bridges.

The invention discloses a simply-supported bridge external prestress supporting structure and an implementation method thereof, and relates to the technical field of bridge reinforcing engineering, the simply-supported bridge external prestress supporting structure comprises a bridge, a bridge abutment or a bridge pier, and further comprises an oblique supporting system, and the oblique supporting system comprises oblique supporting rods, hinge plates, anchoring plates, reinforcing rods and longitudinal tie bars; the hinged plate is anchored on a bridge abutment or a bridge pier, one end of each oblique supporting rod is supported at the bottom of the bridge, the other end of each oblique supporting rod is hinged to the hinged plate, the anchoring plate is a full-length steel plate and is anchored through the reinforcing and reinforcing rods driven into the bridge abutment or the bridge pier, and one reinforcing and reinforcing rod is arranged at the installation position of each oblique supporting rod. The longitudinal tie bars are connected with the anchoring plates and the inclined supporting rods, and the inclined supporting rods are tensioned to support the bridge. The bearing capacity of the bridge is increased at low cost through in-vitro reinforcement, so that the traffic safety under the condition that the traffic load of the bridge is increased for a short time is met, and meanwhile, the adverse effects of reinforcement and reconstruction on traffic are reduced.

The invention discloses a construction method and a construction system for bridge joist pier replacement, and relates to the technical field of bridge construction.The construction method comprises the following steps that gate-type pier studs are arranged on the two sides of a to-be-replaced pier, two steel cover beams are arranged on the corresponding gate-type pier studs in the longitudinal direction of a bridge, and a sliding structure is arranged on the two steel cover beams; temporary supporting pieces are arranged on the two steel cover beams, and the bridge superstructure is supported through the temporary supporting pieces; a pier cap of the to-be-replaced pier is cut off, the pier cap is moved out through a sliding structure, and the steel coupling beam is moved to the position where the original pier cap is located through the sliding structure; and supporting the upper structure of the bridge by using the steel coupling beam, and removing the temporary supporting piece to complete pier replacement. According to the construction method, in the joist pier replacement process, the connection stability is high, the construction method is simple, and the construction efficiency and safety are ensured.

The invention belongs to the technical field of building materials, and particularly discloses maintenance-free lightweight spraying ultra-high performance concrete as well as a preparation method and application of the maintenance-free lightweight spraying ultra-high performance concrete. Comprising 700 to 900 parts of Portland cement, 120 to 200 parts of silica fume, 100 to 200 parts of a layered mineral admixture, 30 to 70 parts of a gradient active expanding agent, 600 to 800 parts of modified lightweight aggregate, 0.5 to 3 parts of a rheology regulating agent, 40 to 80 parts of composite fiber, 7 to 10 parts of a water reducing agent and 170 to 200 parts of water. Based on the synergistic effect of all the components, on the basis that the light ultra-high performance concrete can be continuously sprayed, the spraying performance, the shrinkage performance and the interface bonding performance are further improved, the anti-cracking performance, the mechanical performance and the durability of the light ultra-high performance concrete are enhanced, formwork erecting, film covering maintenance and later maintenance are not needed in construction, and the construction period is shortened. And moreover, the coating has the advantages of small apparent density, strong interface adhesion, thick single-time spraying, high crack resistance, low shrinkage, ultrahigh strength, high durability and the like.

The invention relates to the technical field of bridge maintenance, in particular to a repair method capable of effectively treating serious defects of a bottom plate of an operation small box girder bridge, which comprises the following steps: S1, preparation work: comprehensively checking a small box girder, determining the damage range and degree and marking a damage area, S2, forming a cleaning hole and a mud jacking hole, and S3, carrying out construction of the cleaning hole and the mud jacking hole. The method comprises the following steps: S1, determining a small box girder to be repaired, forming cleaning holes in a web plate and a bottom plate of the small box girder, and forming a grouting hole in the bottom plate of the small box girder, S3, cleaning the small box girder, and removing loose concrete and abnormal materials by extending a high-pressure water gun into a cavity of the small box girder to enable an interface to be fresh and rough, S4, carrying out pressure injection of a grouting material, and S5, an outer formwork is installed at the bottom of the beam, the periphery of the outer formwork is sealed through sealant, it is ensured that grouting materials cannot leak in the pressure injection process, after sealing is completed, cement-based grouting materials are injected into an inner cavity of the small box beam in a segmented pressure injection mode through the grouting holes, and the thickness of a repairing layer of each segment is controlled, and S5, the outer formwork, the plugging cleaning holes and the grouting holes are removed.

Unmanned aerial vehicle-based anti-corrosion coating detection and local repair integrated equipment, comprising a body (1), a battery (2), foot stands (3), and flight components. The battery (2) is disposed on the upper side of the body (1); two left-right symmetrical foot stands (3) are mounted on the lower side of the body (1); four flight components arranged in an annular array are arranged on the outer side of the body (1); the flight components are powered by the battery (2), to implement flight; the equipment further comprises an observation component, a spraying component, an anti-collision ring (4), air inducing plates (5), and a balance maintenance system; the observation component for observing a damage position of a steel bridge is disposed at the front side of the body (1); the spraying component for repairing the damage position of the steel bridge is mounted on the lower side of the body (1); the anti-collision ring (4) for preventing the unmanned aerial vehicle from colliding with the steel bridge is mounted on the outside of the four flight components arranged in an annular array; two left-right symmetrical air inducing plates (5) for guiding airflows are arranged between two flight components located at the front side; the balance maintenance system for maintaining the balance of the unmanned aerial vehicle is mounted on the body (1); the spraying component is connected to the balance maintenance system; and the balance maintenance system is connected to the battery (2). According to the equipment, the airflows are guided by means of inclined planes on the anti-collision ring (4), to reduce airflow-induced drone wobbling; downward airflows caused by the flight components are guided by means of the air inducing plates (5), so that the two downward airflows form a downward air passage between the two air inducing plates (5), to blow rebounding dry sand to the bottom, and therefore the dry sand is prevented from affecting observation about a rusty part of the steel bridge by a camera.

The invention relates to the field of intelligent transportation systems, discloses an intelligent highway maintenance system and method, and aims to solve the fundamental defects that in the prior art, the data acquisition dimension is single, the maintenance decision depends on artificial experience, and prospective prediction is lacked. The method comprises the following steps: acquiring multi-modal dynamic sensing data covering a whole road domain; constructing and updating a four-dimensional space-time digital twinborn model in real time; driving the causal graph neural network model to perform structure health state prediction and diagnosis; generating an active maintenance instruction through a multi-objective optimization engine; and the autonomous maintenance execution unit is dispatched to complete unmanned closed-loop operation. According to the method and the system, fundamental transformation of road maintenance from passive response to active prevention, from artificial experience to intelligent decision making and from discrete operation to closed-loop automation is realized, and the maintenance efficiency, the safety and the health level of the whole life cycle of the road are remarkably improved.

The present invention relates to a satellite monitoring method for detecting structural anomalies of a bridge by means of permanent scatterers of a first (IA) and a second (ID) satellite radar images time series, corresponding to opposite ascending and descending satellite orbital geometries along an axis of a satellite reference system. The method comprises a step A of selecting a common subset of permanent scatterers (PSP), a step B of temporal alignment of the time series, a step C of linear interpolation of the time series, a step D of defining a local mobile reference system M-LCRS of the bridge, a step E of projecting the time series in an END reference system, a step F of projecting the time series in the M-LCRS system, a step G of spatial averaging among the permanent scatterers of the common subset of the time series, a step H of processing according to a trendseasonal decomposition STL-LOESS method, and a step I of comparing with predefined thresholds for detecting structural anomalies.

The invention relates to an intelligent permeation grouting process and device for concrete crack self-repairing. The intelligent permeation grouting process and device are suitable for crack detection and repairing of a newly-built concrete structure. The device comprises a blood vessel network embedded into concrete, a crack detection sensor, a control module, a pumping module and a self-repairing material storage module, and automatic detection and repairing of cracks are achieved. The technological process comprises crack detection, data analysis, grouting parameter determination, material injection and repair monitoring. Through the automation and intelligence technology, the repairing efficiency and precision are remarkably improved, and the device is suitable for large structures such as bridges and tunnels.

The utility model discloses a crack maintenance device which comprises a cart plate, a connecting arm fixedly installed on the upper surface of one end of the cart plate, a grab handle fixedly installed at one end of the connecting arm, a locking disc fixedly installed on the upper surface of the cart plate, a material filling barrel fixedly installed on the upper surface of the locking disc, and a discharging pipe communicated with one end of the material filling barrel. The discharging pipe penetrates to the lower surface of the cart plate, a partition mechanism is slidably mounted in the discharging pipe, and the control end of the partition mechanism is fixedly mounted on the outer surface of the grab handle. By means of the design of the filling material barrel, a worker can accurately control flowing-out and stopping of filling materials by kneading the traction handle, through the design, the operator can conveniently control the flow of the filling materials, waste is avoided, and loss of the filling materials in unnecessary areas is reduced.

The utility model discloses a reinforcing device, which relates to the technical field of structural engineering, and comprises a reinforcing plate, fixed end anchorage devices and a midspan back shore mechanism, the two ends of the reinforcing plate are respectively connected with a reinforced member through the fixed end anchorage devices, the middle part of the reinforcing plate is connected with the reinforced member through the midspan back shore mechanism, and the middle part of the reinforcing plate is connected with the reinforced member through the midspan back shore mechanism. The midspan jacking mechanism is used for conducting prestress tensioning on the reinforcing plate. The reinforcing device is simple in structure, high in operability and capable of improving the ultimate strength and ductility of a reinforced component.

The invention discloses a suspension bridge double-layer different-sag four-main-cable extension structure and an extension method. The extension structure is characterized in that a lower-layer extension stiffening beam and an existing suspension bridge stiffening beam are arranged in parallel up and down and are connected through web members to form a double-layer truss structure; the lower-layer extension stiffening beam transmits a load to the newly-added main cable through the beam bottom transverse suspension cable cross beam and the newly-added sling; the newly-added main cables are located on the side, far away from the center line of the bridge axis, of the existing main cable and arranged side by side, the newly-added main cables are vertically supported on the expanded bridge tower through newly-added vertical main cable saddles, and pulling force is transmitted to the newly-added second anchors through side span newly-added second cable saddles and anchoring systems. The midspan point of the newly-added main cable is located below the upper-layer bridge floor, the vertical span ratio is larger than that of an existing main cable, and the number of materials of the newly-added main cable is reduced. The newly-added slings and the existing slings are longitudinally arranged at intervals and are different in longitudinal and transverse positions, so that the problem that the local fatigue stress of the steel structure at the anchoring positions of the slings and the steel beams is large is solved; the sags of the four main cables are different, so that the dynamic stability of the suspension bridge is improved.

The utility model discloses an anti-scouring device for a river bridge pier, which relates to the technical field of bridge engineering and comprises a bottom support hoop, a first arc-shaped protective cover, a first mounting plate and a second arc-shaped protective cover, and one end of the top of the bottom support hoop is fixedly connected with the first arc-shaped protective cover. First mounting plates are fixedly connected to the two ends of the top and the two ends of the bottom of the first arc-shaped protection cover correspondingly, a second arc-shaped protection cover is slidably connected to the other end of the top of the bottom supporting hoop, and second mounting plates are fixedly connected to the two ends of the top and the two ends of the bottom of the second arc-shaped protection cover correspondingly. According to the bottom supporting hoop, the first arc-shaped protection cover, the first mounting plate and the second arc-shaped protection cover, the bridge pier is protected on the basis of buffering water flow, and therefore the problem that an existing river channel bridge pier anti-scouring device cannot buffer the water flow, and the anti-scouring effect is poor is solved.

The utility model relates to an adjustable steering block device for reinforcing external prestressed tendons of a bridge. The adjustable steering block device comprises a hollow slab beam and a steering block device body arranged on the lower side of the hollow slab beam. The steering block device comprises a bottom plate and a screw supporting plate located below the bottom plate, at least one set of adjusting screws are arranged between the bottom plate and the screw supporting plate, each set comprises two vertically-arranged adjusting screws, a steering block is arranged between the two adjusting screws in the same set, the section of the steering block is semicircular, and the arc-shaped face of the steering block faces downwards. The adjusting screw rod is in threaded connection with an upper adjusting nut and a lower adjusting nut which are used for clamping the end of the steering block in a matched mode. According to the adjustable steering block device for reinforcing the external prestressed tendon of the bridge, the damage degree to the bridge is small, the construction efficiency is high, the steering block is detachably installed, consumables are few, the height of the steering block can be adjusted by matching the adjusting screw rod with the adjusting nut, and the use is convenient. The height of the steering block can be directly adjusted according to the condition of prestress relaxation to improve the prestress degree of the prestressed tendon.

The invention relates to the technical field of bridge engineering, in particular to an in-service steel bridge U rib and top plate crack double-face welding repairing method and application thereof. The method comprises the steps that the position of a crack is determined, a bridge deck pavement layer above the crack is removed, and the surface of a bridge deck slab in a crack area is cleaned; flattening the bridge deck slab on the two sides of the crack, and fixing the flattened bridge deck slab; u-rib internal welding construction process holes are formed; u rib inner welding reinforcing welding and weld leg increasing welding are carried out in an inner corner area where the U rib with the cracks is connected with the top plate; sealing and repairing the construction process hole; carrying out carbon arc air gouging on the crack above the bridge deck slab, and forming a gouging groove in the bridge deck slab; and polishing and multi-layer and multi-pass welding are carried out on the planed groove. The method is fused with an internal welding technology, is a comprehensive repair scheme with root treatment, double reinforcement, controllable deformation and reliable quality, thoroughly overcomes the technical defects of treatment of symptoms, no treatment of root causes, easy secondary damage, poor reliability and the like in the prior art, and remarkably prolongs the service life and the safety performance of the in-service steel bridge.

The invention discloses a four-main-cable suspension bridge extension structure for transforming a single-layer suspension bridge into double-layer traffic, which realizes structure extension for transforming the single-layer suspension bridge into the double-layer traffic, fully utilizes the abundant bearing capacity of the existing suspension bridge body structure while increasing the number of lanes, and reduces the investment scale. According to the technical scheme, an existing suspension bridge stiffening beam, a lower layer stiffening beam and a bridge tower are included; the lower-layer stiffening beam is arranged on the lower portion of the existing suspension bridge stiffening beam, and the existing suspension bridge stiffening beam and the lower-layer stiffening beam are arranged in parallel to form a double-layer truss structure; straight web members and diagonal web members are arranged between the existing suspension bridge stiffening beam and the lower-layer stiffening beam and arranged on the two sides of the lower-layer stiffening beam. The connecting piece is used for connecting the existing suspension bridge stiffening beam and the lower stiffening beam; the existing suspension bridge stiffening beam and the lower-layer stiffening beam are both connected with the bottom of the bridge tower, and the existing suspension bridge stiffening beam and the lower-layer stiffening beam are both connected with the top of the bridge tower through connecting assemblies.

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 relates to the technical field of bridge crack repairing, in particular to a bridge beam plate curing and reinforcing device which comprises a glue injection barrel, a glue injection opening and a glue pouring opening are formed in the glue injection barrel, a piston and an elastic piece are arranged in the glue injection barrel, the elastic piece pushes the piston to extrude repairing glue liquid to enter a crack, and an adjusting assembly is further arranged in the glue injection barrel. The adjusting assembly enables the force of the elastic piece for pushing the piston to be increased compared with the force of previous pushing, the repairing glue solution overcomes blockage in the crack and can permeate into the deepest position of the crack, and the multiple locking rods are arranged, so that the force of the elastic piece for pushing the piston each time is larger than the force of pushing the piston last time, and the repairing quality is improved. Therefore, the pushing force of the piston to the repairing glue solution is gradually improved, the glue solution in the crack can be ensured to be densely and uniformly distributed, the repairing quality problem caused by non-uniform flowing of the glue solution subsequently is avoided, and the strength after repairing is improved.

A pier column reinforcing and reinforcing structure comprises tensioning steel plate strips, prestressed tendons, steel bar grids, micro-expansion concrete and a steel casing, the tensioning steel plate strips comprise steel plate strips and a plurality of steel cushion blocks arranged on the steel plate strips, the multiple tensioning steel plate strips surround the outer surface of a pier column to be reinforced in parallel, the tops of the steel cushion blocks are in a concave shape, and the steel cushion blocks are arranged on the steel plate strips. The prestressed tendons are tensioned on the peripheries of the tensioning steel plate strips in a surrounding mode and are positioned through concave faces at the tops of the tensioning steel plate strips, each tensioning steel plate strip corresponds to one prestressed tendon, the steel bar grid is arranged on the peripheries of the prestressed tendons and wraps the prestressed tendons, the tensioning steel plate strips and the pier column to be reinforced, and the steel casing is arranged on the peripheries of the steel bar grid and wraps the prestressed tendons, the tensioning steel plate strips and the pier column to be reinforced. And the micro-expansion concrete is filled between the steel casing and the pier column to be reinforced. Axial constraint is provided through combination of an active mode and a passive mode, the bearing capacity and the bending resistance of an original bridge pier column are greatly improved, and the bridge pier column is environmentally friendly, economical, high in space utilization rate and good in reinforcing effect.

The invention discloses a split type bent cap and a construction method thereof, belongs to the field of bridge engineering, and solves the bottleneck problems in the aspects of weight, precision, efficiency, durability and the like in traditional bent cap construction. The method mainly solves the bottleneck problems in the aspects of weight, precision, efficiency, durability and the like in traditional capping beam construction, and meanwhile provides a key technical path for industrialization and greenization transformation of bridge engineering. The construction method comprises the steps that the bent cap unit is hoisted to the position above the bridge pier and slowly lowered, so that the connecting steel bars are inserted into the socket holes, and the placing faces are placed on the top of the bridge pier; after socket mounting is completed, the bent cap units are sequentially connected through the energy dissipation tie bars; and after connection is completed, high-strength concrete is poured into the socket hole through the cast-in-place notch, the bent cap unit and the pier are connected into a whole, and the containing groove is blocked. A traditional integral type cover beam is transformed into a split type structure, the cover beam is modularized into a plurality of standardized light cover beam units, and dependence on hoisting equipment is greatly reduced.

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 an intelligent tensioning method and system for surface cracks of an annular prestressed steel wire rope reinforced bridge pier, and the method comprises the steps: carrying out the image recognition based on a collected image, and obtaining the stress data of all marking points of a steel wire rope and bridge pier concrete; acquiring actual tension end control stress of each stage of the steel wire rope; obtaining a formula between the control stress of the tensioning end of the steel wire rope and the stress of each mark point, wherein the formula contains parameters to be solved; fitting an actual value of a to-be-solved parameter in the formula; and on the basis of a known formula of the parameters to be solved, the final tension end control stress is calculated according to the reinforcement requirement of the concrete at the mark point. The intelligent tensioning method is provided by combining field strain monitoring, a dynamic reinforcing stress calculation method and an automatic tensioning control device, the actual reinforcing stress is determined, the tensioning force is controlled based on the reinforcing effect, and the actual reinforcing effect is effectively evaluated.

The invention belongs to the technical field of asphalt stirring, and discloses an asphalt stirring device based on road and bridge pothole filling, the asphalt stirring device comprises a base, a stirring and scraping mechanism is arranged above the base, the stirring and scraping mechanism comprises a mixing tank, asphalt is fully stirred through the stirring and scraping mechanism, and through a sleeve in the stirring and scraping mechanism, the stirring and scraping mechanism is driven to rotate; according to the double-shaft driving design of the rotating pipe, an efficient and synergistic stirring and scraping system is constructed, the inclined face of an arc-shaped scraping plate is attached to the inner wall of the mixing tank and matched with a wear-resistant ceramic coating, adhered asphalt is scraped in real time in the rotating process, meanwhile, the rotating pipe synchronously rotates, radial stirring is achieved through external stirring blades of the rotating pipe, and a spiral lifting piece pushes bottom asphalt to axially flow; by matching with the turbulent flow effect of the U-shaped heat conduction pipe, the asphalt forms a three-dimensional flow field in the tank, an auxiliary agent and the asphalt are fully fused, the problem of non-uniform mixing caused by traditional single-dimension stirring is solved, the stable performance of the asphalt is guaranteed, and a basic support is provided for crack resistance and water damage resistance after pavement filling.

The invention discloses a combined type cable deicing device and method.The combined type cable deicing device comprises a cable sliding box and a combined type deicing device body, the combined type deicing device body comprises an ultrasonic deicing module, a mechanical deicing module and an electric heating ice melting module, and the mechanical deicing module comprises a rotating base assembly and a rotating driving disc; the rotary base assembly is fixed in front of the cable sliding box through a connecting frame, a motor is installed on the rotary base assembly, a cutter base is installed on the front side of the rotary driving disc, at least one deicing blade is installed on the cutter base, and an electric heating ice melting module is installed on the rear side of the rotary driving disc; a power module electrically connected with the ultrasonic deicing module, the motor and the electric heating ice melting module is arranged in the cable sliding box. The detection processing system obtains the state of the icicles in front, the controller controls the ultrasonic deicing module, the mechanical deicing module and the electric heating ice melting module to work independently or / and work intensity in a combined mode, and the most suitable deicing operation mode can be adopted according to different icicles.

The invention discloses a maintenance and reinforcement method for improving the bearing capacity of a beam bridge, and belongs to the technical field of bridge reinforcement. The maintenance and reinforcement method for improving the bearing capacity of the beam type bridge comprises the steps that a prestressed carbon fiber plate is tensioned on a bottom plate of a beam body so as to improve the flexural capacity of the beam body; a plurality of inclined steel plates are fixed to the web shearing and bending section of the beam body in the longitudinal direction of the beam body so as to improve the shear bearing capacity of the beam body; the prestressed carbon fiber plate is arranged in the longitudinal direction of the beam body, and the tensioned prestressed carbon fiber plate is bonded with a bottom plate of the beam body; a certain included angle is formed between each inclined steel plate and the longitudinal direction of the beam body; first steel pressing strips are distributed on the multiple inclined steel plates, the first steel pressing strips are arranged in the longitudinal direction of the beam body and anchored to a web plate of the beam body, and the first steel pressing strips are used for pressing the multiple inclined steel plates to the web plate of the beam body. According to the reinforcing method for improving the bearing capacity of the beam bridge, the bending resistance and the shearing resistance of the existing beam bridge can be effectively improved, the reinforcing method is simple, and construction is convenient.

The invention relates to the technical field of pile foundation reinforcement, and discloses a pile foundation reinforcement structure for reinforcing roads and bridges, which comprises a hydraulic telescopic support mechanism and four threaded telescopic support mechanisms. According to the pile foundation reinforcing structure for reinforcing the road bridge, the longitudinal supporting effect between the bridge and the bridge pier is achieved through the hydraulic supporting principle, meanwhile, the longitudinal supporting capacity of the threaded structure is combined, longitudinal supporting is achieved on the bridge in a combined mode, and the longitudinal meshing force of the threaded structure can achieve the supporting function on the bridge through the combination; the pressure of the liquid not only can achieve auxiliary supporting of the threaded structure, but also can achieve auxiliary supporting of the bridge, so that the auxiliary supporting of the threaded structure and the auxiliary supporting of the bridge supplement each other, and a more stable supporting effect is achieved.

The invention discloses a double-layer bridge for expressway extension and a construction method. The double-layer bridge comprises a bridge body arranged along an expressway, and the bridge body comprises a first beam body and a second beam body arranged below the first beam body; the first beam body comprises a plurality of first beam sections and a plurality of second beam sections which are fixedly connected, and the first beam sections are arranged side by side in the direction perpendicular to the width direction of the beam body; the second beam sections are arranged side by side in the width direction of the beam body. The second beam body comprises a plurality of sub-beams which are fixedly connected, the sub-beams are arranged side by side in the direction perpendicular to the width direction of the beam body, and the sub-beams are continuously arranged in the width direction of the beam body; a plurality of suspenders fixedly connected with the first beam body are arranged on the second beam body; the double-layer bridge further comprises a plurality of bridge piers used for fixing the bridge body. A navigable river channel corresponds to the lower portion of at least part of the area of the second beam body, and no pier is arranged in the area of the navigable river channel.

The invention discloses an asphalt pavement crack repairing method based on laser fusion and a crack filling material thereof. The asphalt pavement crack repairing method comprises the following steps that S01, asphalt pavement cracks are accurately detected; s02, the asphalt crack is preprocessed, and parameters of an asphalt pavement material are determined; s03, parameters of a joint filling material are determined; s04, performing laser simulation on the asphalt pavement; s05, joint filling materials are evenly added into the cracks; and S06, performing laser fusion on the asphalt crack. According to the repairing method, the heat energy can be accurately controlled through laser, it is ensured that the crack is repaired under the condition that surrounding asphalt is not damaged, accurate parameter adjustment of different cracks is achieved, a more efficient, more accurate and environment-friendly asphalt crack repairing scheme is provided, repairing is rapidly completed, and the traffic closing time and the construction time are shortened.

The utility model belongs to the technical field of bridge engineering, and particularly relates to a structure for widening a new bridge and an old bridge flexibly by adopting telescopic steel bars, which comprises a bridge web, a mounting groove, a fixing plate unit, the steel bars, pipe bodies and a tensile combination block unit, so that 1, a combined sleeving structure of a plurality of steel bars and a plurality of pipe bodies has enough flexible deformation capability, and the tensile combination block unit can be used for widening the new bridge and the old bridge; the new and old bridges are allowed to generate proper relative displacement in the vertical direction and the longitudinal direction; 2, the combined sleeving structure is still an integrated connecting structure, so that the vertical load can be fully transmitted, and the old bridge is further protected; 3, the new bridge and the old bridge are difficult to be far away from each other greatly in the transverse bridge direction, so that the basic function of widening connection is realized; and 4, when the fixing plate unit is installed, the new and old bridge structures do not need to be greatly changed, and the structural strength of the new and old bridges cannot be greatly damaged.