528 results about "Bridge maintenance" patented technology

The invention discloses an external prestressing construction method for box bridge maintenance, which is characterized in that: 1). The position of an anchor block, a redirector and a shock absorber are decided according to external cable arranging mode for external prestressing; 2). The installation of the anchor block: 2.1). concrete base surface processing; 2.2). hole drilling, hole cleaning and reinforcing bar planting; 2.3). the installation of steel-bonded steel plate: the anchor block comprises a steel-bonded steel plate, a connecting plate and a stiffening plate; all anchor bolts are penetrated through a corresponding fixing hole on the steel-bonded steel plate; 2.4). the installation of other steel plates for the anchor block; the connecting plate is welded with the steel-bonded steel plate, the stiffening plate is welded with the steel-bonded steel plate and is provided with a through hole for external cable; 2.5). glue pouring for the steel-bonded steel plate: glue pouring is made between the steel-bonded steel plate and the concrete base surface for the anchor block; 3). Horizontal partition wall perforation; 4). The installation of a redirecting support and a damping support; 5). The installation of the redirector; 6). Penetrating and tension of prestressing steel strand; 7). The installation of the shock absorber. The invention has the advantages of convenient construction, flexibility and stronger reliability.

The invention discloses a hanger articulated bridge inspection vehicle, belonging to bridge maintenance and construction equipment. The hanger articulated bridge inspection vehicle comprises a frame chassis (21), a suspension arm is a C-type hanger (25), the frame chassis (21) is articulated with the lower end of a pillar (23) by a longitudinal axis hinge (22) and a longitudinal axis, the upper end of the pillar (23) is articulated with the protruded end of an upper cross beam of the C-type hanger (25) by a transverse axis hinge (24) and a transverse axis, or the frame chassis (21) is articulated with the protruded end of the upper cross beam of the C-type hanger (25) by the longitudinal axis hinge (22) and the longitudinal axis, and the protruded end of a lower cross beam of the C-type hanger (25) is at least provided with a fixed point of a lifting rope (26) or a lifting rope extending-retracting device. According to the invention, the pulling force of the lifting rope (26) on an inspection platform (5) can be directly transferred to a bridge floor (2), therefore, the vehicle disclosed by the invention is small in overturning moment, light in structure and convenient to assemble and use, and can be erected on sidewalks on both sides of a bridge, so that the vehicle is especially suitable to be applied to the bottom detection and maintenance engineering of heavy traffic bridges.

The invention discloses bridge maintenance equipment comprising a material case. A first sliding cavity is formed in the interior of the left side of the material case. A first guiding groove is formed in the inner wall of the left side of the first sliding cavity. A second sliding cavity communicating with the first sliding cavity is formed in the interior, on the right side of the first sliding cavity, of the material case. A discharging groove extending up and down is formed in the interior, on the right side of the second sliding cavity, of the material case. A closing groove penetrating through the discharging groove and extending rightward is formed in the top of the second sliding cavity. A conic cavity is formed in the top of the discharging groove. A feeding cavity is formed in the top of the conic cavity. A third sliding cavity is formed in the interior, on the first sliding cavity, of the material case. Third guiding grooves are formed in the inner walls of the left and right sides of the third sliding cavity symmetrically. A spiral rod is arranged in the first sliding cavity. The bottom of the spiral rod is connected with a first driving machine. A lifting block is connected on the spiral rod in a threaded fit mode. The structure is simple, the design is reasonable, operation is easy, stirring and discharging work can be controlled automatically, the labor amount of workers is reduced, the construction maintenance speed is improved, meanwhile, a lighting function is achieved, the using cost is low, and the existing requirement is met.

The invention discloses a method for reinforcing and strengthening a main cable of a suspension bridge, and belongs to the technical field of suspension bridge maintenance. The method comprises the steps of erecting a new main cable right above an original main cable along the original main cable in parallel, enabling cable saddles and anchorages of an original bridge to be used as installation fixing points of the new main cable, arranging cable clamps at two sides of a position, which corresponds to a cable clamp on the original main cable, on the mew main cable, respectively forming an installing groove in the middle part of the upper end of each cable clamp, respectively arranging a U-shaped suspension rod in the corresponding installing groove in a hanging way, enabling the U-shaped suspension rods to be in contact with and connected with the lower bottom surface of an original suspension rod anchor head by a connecting plate, and uniformly regulating the internal force of each U-shaped suspension rod. The method for reinforcing and strengthening the main cable of the suspension bridge, disclosed by the invention, has the advantages that the original main cable is uniformly reinforced, and an internal force balance state of an original bridge floor system is maintained; common load bearing of the new main cable and an old main cable is realized, and the problem that original rated load is difficultly borne due to the damage of the main cable of the original bridge is solved.

The invention belongs to the technical field of bridge maintenance and particularly relates to a self-propelled dual-beam bridge maintenance platform. According to the technical scheme, the self-propelled dual-beam bridge maintenance platform comprises two maintenance rack cars of the identical structure; each maintenance rack car comprises a bridge floor traveling mechanism, a telescopic arm assembly, turning mechanisms, vertical trusses, a detection platform fixing frame, a detection platform telescopic frame and a docking device; the traveling mechanisms are arranged on the two sides of a bridge floor; the head portion of each telescopic arm assembly is connected with the corresponding traveling mechanism; the upper portion of a connecting cross beam of each telescopic arm assembly is provided with the two corresponding turning mechanisms, and the two turning mechanisms are each provided with one vertical truss; the lower portion of each vertical truss is connected with a bottom detection platform; and as for the two maintenance rack cars, the bottom detection platforms can be connected into a whole through the docking devices. The self-propelled dual-beam bridge maintenance platform has the advantages of being convenient and fast to install, capable of being unfolded mechanically, free of occupying the bridge floor and influencing traffic, capable of passing through obstacles on the roadside and pier obstacles, and the like.

The invention discloses a bridge scouring multi-source monitoring system, a bridge scouring multi-source monitoring method and a scouring depth evaluation method. The bridge scouring multi-source monitoring system comprises an intelligent monitoring system, a data industrial personal computer, a 5G remote communication transmission system and a remote scouring depth evaluation center. The intelligent monitoring system is composed of three subsystems including a bridge dynamic characteristic high-frequency real-time monitoring system, an adjustable sound velocity underwater depth monitoring system and a flushed seabed soil pressure change testing system. Pile side data can be acquired in a triggered control mode through mutual coupling, a multi-source bridge local scouring real-time sensingand monitoring system is formed, and clock synchronization, scouring environment condition dynamic control and integrated integration of a contact sensor and a non-contact sensor are achieved. The system can perform integrated monitoring on a scouring interface, seabed sludge scouring and silting and bridge dynamic response; and the structure scouring depth evaluation method can provide a basis for bridge maintenance, and safe operation of a bridge under the scouring action is effectively guaranteed.

The invention discloses an adjustable split-type movable hanging basket for bridge maintenance and an operating method. The adjustable split-type movable hanging basket for the bridge maintenance comprises two supporting cross beams, a counterweight platform, a constructing operation platform, walking devices and a hanging frame. During using in actual engineering, the walking counterweight platform with a locking function is placed on the inner side of a bridge guardrail and is spaced by a distance from the guardrail so as to provide a greater torque for a counterweight block, the constructing operation platform on the other side is placed on the outer side of the guardrail in a cantilevered manner, and the guardrail serves as a stressing fulcrum for the two supporting cross beams; according to different bridge types and guardrail sizes, the supporting cross beams of the hanging basket are transversely stretched and retracted and the hanging frame thereof is vertically stretched and retracted so as to meet constructing operation requirements; the hanging basket is moved to a position where the maintenance is required by pushing the walking counterweight platform, and walking wheels are locked by opening bolts fixed to walking wheel hoods, so that the guardrail and a lower flange plate can be maintained and repaired on the operation platform.

The invention relates to a bridge maintenance and reinforcement technology, particularly to a construction method for jacking arched bridges. The method is characterized by comprising the following steps: firstly, placing and jacking a base; secondly, placing a pallet beam and a stretching prestressed steel strand; thirdly, setting a spacing device; fourthly, entirely jacking; fifthly, performing top-connecting construction; and sixthly, mounting a support, wherein the order of the first, the second and the third steps can be interchangeable. The method has the advantages of simplicity in operation, high safety and definite force transmission; and although the span of arch after jacking is slightly reduced, the integrity of a pier foundation in position after jacking is excellent, and the integral security is higher than that of the original design.

The invention discloses an outrigger-lifting type bridge deck erecting machine and a bridge deck erecting method and relates to the technical field of bridge maintenance, reinforcement, reconstruction project and construction. The outrigger-lifting type bridge deck erecting machine comprises a main structure, a support mechanism and a hoisting device, wherein the main structure comprises two main girders which are arranged oppositely; a first crossbeam is fixed between the ends at one side of the two main girders and a second crossbeam is fixed between the ends at the other side of the two main girders; the two main girders are segmental structures; the support mechanism comprises a front outrigger, a middle outrigger and a rear outrigger which are fixed to the two main girders and are all provided with telescopic devices; the telescopic devices enable the front outrigger, the middle outrigger and the rear outrigger to stretch and contract; the rear outrigger comprises a folding device which is connected with the first crossbeam; the folding device drives the rear outrigger to fold around the first crossbeam; traveling devices are respectively arranged at the lower part of the middle outrigger and the rear outrigger and can travel along the longitudinal and transverse direction of a bridge; the hoisting device comprises a bridge crane and a hoisting apparatus; the hoisting apparatus is arranged at the lower part of the bridge crane; and the bridge crane can lift and lower the hoisting apparatus and can also move along the longitudinal and transverse direction of the bridge. The outrigger-lifting type bridge deck erecting machine has the advantage of convenient disassembly and assembly and has the function of longitudinal movement and transverse movement.

The invention provides a decision-making method for maintaining middle and small span concrete bridges. The decision-making method provided by the invention comprises the following steps of: (2) determining a decision-making object and a predicated age limit, wherein the decision-making object is a bridge network OD (Outside Dimension) model; (2) indentifying the bridge network OD model: converting an image-formed OD model into a numerical-value-formed OD model and identifying a minimum path set matrix P which can be used for a decision-making calculation; (3) establishing a cost model of a maintenance policy and an effect model which can be used for processing an event tree analysis on the OD model to obtain the maintenance policy; (4) carrying out an improved non-dominated sorted genetic algorithm: defining a coding method of the maintenance policy and taking a connecting probability Rnw and a maintenance cost Cnw of the bridge connection as two targets to be participated in a genetic evolution; carrying out a Pareto optimality and searching for the globally optimal solution. The method provided by the invention has the advantages of simple principle, convenience in using, wide application range, good reliability and the like.

The invention provides an expansion joint cleaning device for bridge maintenance, and relates to the technical field of bridge maintenance. The expansion joint cleaning device includes a vehicle board, a cleaning box is fixedly connected to the top of the vehicle board, a first sliding rod is fixedly connected to the inner side wall of the cleaning box, two movable rods are slidably connected to the outer surface of the first sliding rod, and two connecting plates are fixedly connected to the side surface, close to each other, of the two movable rods. According to the expansion joint cleaningdevice for bridge maintenance, connecting rods drive the movable rods to reciprocate left and right on the outer surface of the first sliding rod, so that brush plates at the bottom of the movable rodreciprocate left and right to clean an expansion joint, when encountering clumps which are difficult to clean, a second motor is started to drive a cam to rotate, a shovel block reciprocates left andright through the convex end of the cam and under the action of the rebound of a spring, so that the clumps which are difficult to clean in the expansion joint are shoveled and cleaned up, thus the time-saving and labor-saving effects are achieved, and the cleaning effect is high.

The invention discloses a structure damage early warning method based on multi-point sensor data and BiLSTM, and the method comprises the steps: arranging a plurality of sensors on a structure, collecting the sensor data in a health state and a damage state of the structure, and building a sample library with a damage value label; normalizing the sensor data in the sample library, and determininga time step length input into the BiLSTM network; building a BiLSTM network model, and training and testing the model; and inputting the multi-point sensor data monitored within a certain period of time into the built BiLSTM network model to obtain a final prediction result of the BiLSTM network model, and judging whether to perform damage early warning or not according to the final prediction result. The method does not depend on a structural finite element model, does not need manual participation in the implementation process, is suitable for automatic online damage early warning of an in-service structure, can give an alarm at the first time when the structure is damaged, and provides certain guidance for bridge maintenance and management decision making, so that safe operation of an engineering structure is guaranteed.

The invention belongs to the technical field of bridge construction maintenance and particularly relates to an intelligent bridge maintenance management system based on the Internet of Things and a 3D (three-dimensional) GIS (geographic information system). The system comprises a control management platform and an application server, wherein the control management platform includes a sensing layer with an information 'identification' function and an application layer, and after information 'identification' of the control management platform, a 3D GIS database and a 3D GIS traveling navigation chart are set up to be in communication connection with each hierarchy of the Internet of Things so that remote monitoring of 3D GIS on-site maintenance operation is realized. By the aid of the system, bridge maintenance management efficiency can be effectively improved, management intensity is reduced, and manpower resources are saved.

The invention relates to a method and a device for quickly identifying the state of main cables of a suspension bridge, and is characterized by comprising the calculation of vertical rigidity k. The method comprises the following steps of: symmetrically installing two three-dimensional acceleration sensors for acquiring signals on each main cable to be detected; sending the signals acquired by the sensors into a data acquisition unit for processing, and sending the processed signals to a data analysis unit through a wired mode or a wireless mode to calculate the natural frequencies of vibration omega 1, omega 2 and omega 3 in the former three orders of the main cable; finally calculating the values of the tension S, the bending stiffness E1 and the linear density m of the main cable through three simultaneous formulas; and repeatedly measuring and calculating to draw a variation curve among the tension S, the bending stiffness E1 and the linear density m of the main cable for a bridge maintenance department to identify the state of the main cables. The invention has simple method and high accuracy, and the detection can be carried out in the overall process of the operation of the suspension bridge.

The invention relates to a construction method of external scaffold in box-type bridge maintenance engineering, particularly a construction method of externally-suspended scaffold in maintenance engineering of box-type bridge girder. The invention is characterized in that the method comprises the following steps: 1) building a full hall scaffold, as a hoisting rooting platform, on a pier repair platform of the original bridge or in a smaller space near the pier, and building a first row of in-box horizontal steel tubes (8), vertical leaf steel cables (9), vertical right steel cables (10), low boom columns (13), left vertical steel tubes (12) and right vertical steel tubes (14) on the hoisting rooting platform; 2) cantilevering second and third rows by the same method as the first tow until the maintenance section is covered completely; 3) building trusses; 7) paving gang boards on a truss top chord (15), a left web maintenance platform (22) and a right web maintenance platform (23) respectively, and suspending a safety net. The invention has the advantages of no limitation of space under bridge and short construction cycle.

The invention discloses a prestressed rib connecting and tensioning device and method. The device integrates connection, tensioning and prestress adjustment of a fractured prestressed rib and is most suitable for connection and prestress tensioning of prestressed ribs in bridge structures, wherein the prestressed ribs are partially fractured due to corrosion. A connecting device is composed of two sleeves and quite simple; a tensioning device is composed of a base, a bevel gear and ratchet assembly, a ratchet cap, a four-way pawl, a stressing rod, a nut, a fan-shaped bevel gear, a transmission ratchet and a two-way pawl. According to the prestressed rib connecting and tensioning device and method, centering connection and prestress tensioning can be conducted on the fractured stressed ribs without a jack, operation is convenient, and the safety is high; the tensioning device needs quite small operation space, can be fully dismantled and reused and is economical and environmentally friendly; prestress loss caused by anchorage deformation does not occur in the tensioning process, the prestress value can be adjusted to be higher or lower, and the precision is quite high; and the prestressed rib connecting and tensioning device can be widely applied to the field of prestressed concrete bridge maintenance and reinforcement.

The invention relates to bridge maintenance equipment, in particular to a work car for main cables of a suspension bridge, which is used for maintaining the main cables of the suspension bridge. The work car for the main cables of the suspension bridge comprises a frame, wherein multiple walking wheels are arranged side by side on the bottom of the frame at intervals along the longitudinal direction; the frame is located on the main cables through the walking wheels and further can move along the main cables; the front part of the frame is provided with a hoisting device which provides power for walking; a basket connected with the frame by a hinging way is suspended on the frame; each walking wheel is installed on a lifting seat which can be lifted; and each lifting seat is driven to lift by a power device which is installed on the frame alone. During the walking process of the work car, when the walking wheels are lifted one by one, the frame can be caused to cross over attachment barriers on the main cables; in such a way, the construction difficulty is decreased and the maintenance efficiency is improved; in addition, the frame can be kept without inclination during the walking and maintenance processes through side roller wheels located on two sides of the frame and a correction device; and therefore, the maintenance is facilitated and the safety is improved.

The invention provides an external prestress steel structure anchoring and steering system used for old bridge consolidation and a consolidation method thereof, which is a system applicable to prestress concrete old bridge maintenance and consolidation and a consolidation method thereof. The system comprises a steel structure anchoring system and a steel structure steering system, an anchor bold used for strengthened steel plate in the steel structure anchoring system is connected with a steel anchor box on the bridge span concrete surface of the old bridge, the steel anchor box comprises an anchor backing plate, a diaphragm plate, a stiffened steel plate, a force transfer steel plate and an external chain penetrating the steel pipe, etc. The steel structure steering system comprises a steel truss bracket and a steering gear, the steel truss bracket comprises an upper chord, a lower chord, a gusset plate, a diagonal rod, a vertical rod, a web member, a stiffened plate and a substrate steel plate, etc., the gusset plate, the stiffened plate and the substrate steel plate are connected with the bridge span concrete surface of the old bridge through the anchor bolt, the steering tube is externally sheathed with a traversing tube and an outer thimble, and a lead penetrates the center of the tube. The steering system has strong intensity, small volume and light weight; the system is organically connected with the old bridge and the problems of shear breakdown of the joint face and the after-shrinkage and creep do not exist; and the construction does not disrupt the traffic.

The invention relates to the technical field of bridge detection, and specifically discloses bridge gap detection equipment with a depth structure for bridge maintenance. The equipment comprises a base, side plates, a mounting plate, a protective cover and a detection table; the top center of the base is fixedly connected with the bottom ends of side plates; the top ends of the side plates are rotationally connected with mounting plates through rotating shafts; electric push rods are arranged between two sides of the bottom of the mounting plate and the side plates; a supporting plate is arranged in a cavity in the top of the mounting plate, rotating rods are arranged at the upper end and the lower end of the supporting plate, one end of each rotating rod penetrates through a through holeof the mounting plate and then is in threaded connection with a butterfly nut, and an air cylinder is arranged at the top of the supporting plate and connected with a hydraulic telescopic rod which isconnected with a protective cover. The detection equipment is convenient to move and carry and stable to place during detection; the installation angle of the detector can be flexibly adjusted at multiple angles, the bridge gap measuring range is wide, the equipment manufacturing cost is low, practicability is high, and the detector is suitable for application and popularization.