4193results about "Bridge strengthening" patented technology

Described herein are wireless interrogation systems and methods that rely on a complementary sensing device and interrogator. The sensing device is disposed to measure a parameter indicative of the health of a structure. A sensor reading from the sensor indicates the level of a parameter being monitored or whether one or more particular physical or chemical events have taken place. Using wireless techniques, the interrogator probes the device to determine its identity and its current sensor reading. This often includes transmission of a wireless signal through portions of the structure. When activated, the device responds with a wireless signal that identifies the device and contains information about the parameter being measured or a particular sensor state corresponding to the parameter. The identity of the device allows it to be distinguished from a number of similar devices. Thus this invention finds particular usefulness in the context of an array of devices that can be probed by a wireless interrogation unit. In one embodiment, the devices are passive and derive power from the interrogation signal.

A composition for an organic EL element which can form a high precision pattern in a simple manner and in a short time and a method of manufacturing the organic EL element are disclosed. By using the composition, optimum film design and luminescence characteristic can be easily obtained, and an adjustment of a luminescence efficiency can also be easily performed. The composition for an organic EL element comprises a precursor of a conjugated organic polymer compound for forming at least one luminescent layer (106), (107), (108) having a certain color and at least one kind of fluorescent dye for changing the luminescence characteristic of the luminescent layer. The luminescent layer is made from a pattern formed by an ink-jet method. As for the precursor, a precursor of PPV, PPV derivative or the like is preferably used. Further, it is preferable that the composition for the organic EL element satisfies at least one of the conditions including a contact angle of 30 to 170 degrees with respect to a nozzle surface of a nozzle provided in a head of an ink-jet device used for the ink-jet method for discharging the composition, a viscosity of 1 to 20 cp and a surface tension of 20 to 70 dyne/cm.

The invention provides a bridge structural health monitoring car. A mechanical hand capable of being bent to extend into the lower part of a bridge is arranged on the bridge structural health monitoring car, wherein at least one camera is arranged on the mechanical hand and used for collecting the image information of the bottom and the side face of the bridge; a high-precision GPS positioning device is arranged and used for determining a current detection position and measuring the line shape of the bridge surface; a bridge structure dynamic information collecting device is arranged and used for collecting the dynamic characteristic information data of the bridge structure; an information processing device is arranged and used for storing the image information collected by the cameras, the GPS data and the dynamic characteristic information data, judging the health conditions and the disease development conditions of the bridge structure according to the analysis and the comparison of the monitoring data of each time and definitely indicating the disease conditions and parts by visual images. The bridge structural health monitoring car can carry out health monitoring on a plurality of bridges at the same time.

The invention discloses a bridgehead vehicle bump prevention and control high polymer grouting technique and a construction method thereof. Aiming at the problems of bridgehead butt strap gapping and sinking problems, nondestructive detection systems of a ground penetrating radar (GPR), a falling weight deflectometer (FWD), a laser level and the like are comprehensively applied to detection and monitoring; and a high polymer material is injected to the bottom of a bridgehead butt strap or the bottom of a sleeper beam, the volume of the material is quickly expanded and the material is cured after chemical reaction, so that the gapped butt strap is quickly filled and raised, the roadbed is reinforced, and bridgehead vehicle bump is radically prevented and controlled. Compared with the conventional treatment method, the technique has obvious innovation on the aspects of technical principles and construction methods, has the characteristics of good durability, short construction period, strong pertinence and the like, and initiates a new advanced, efficient, economic and practical bridgehead bump prevention and control path.

The present invention discloses a bridge structural safety monitoring system and a bridge structural safety monitoring method. The method includes the steps of capturing an image of a monitoring area of a bridge to create a standard image of the bridge operated at normal conditions, capturing images of the monitoring area of the bridge continuously to obtain monitoring images, comparing the standard image with the monitoring image to obtain a displacement correlation coefficient of the monitoring area of the bridge, and transmitting the displacement correlation coefficient to a central console, such that the central console can determine the using condition of the bridge according to the displacement correlation coefficient.

The invention relates to an automatic cleaning and maintaining device for a building bridge. The automatic cleaning and maintaining device is used for cleaning and maintaining the bridge. The bridge comprises a cross main beam (4) and an auxiliary beam (41), wherein the cross main beam (4) is provided with a guide rib (2) extending transversely, and the auxiliary beam (41) is supported by the cross main beam (4). The automatic cleaning and maintaining device comprises a supporting frame (99), a water supply pipe (61) and a spray nozzle (62) communicated with the water supply pipe (61) to be aligned with the part, needing to the cleaned, of the bridge to carry water spraying cleaning, wherein the water supply pipe (61) is supported by the supporting frame (99) and is close to the main beam (4). The upper surface and the lower surface of the guide rib (2) are provided with a plurality of guide protrusions extending along the guide rib (2).

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.

An apparatus, method, and system for providing a broadcasting service in a Digital Multimedia Broadcasting (DMB) system with a Single Frequency Network (SFN). Networks of shadow and non-shadow regions can be distinguished in the digital broadcasting system. A conditional access system can be used in the shadow region. A terminal can select a service network. A broadcasting providing server encrypts broadcasting service data, generates private and public keys into which predetermined encryption keys are divided to decrypt the encrypted broadcasting service data, sets at least one broadcasting transmitter for transmitting the private key and/or at least one broadcasting transmitter for transmitting the public key, and provides the encryption keys along with the encrypted broadcasting service data. Broadcasting transmitters transmit the encrypted broadcasting service data received from the broadcasting providing server and the private key using the SFN. At least one of the broadcasting transmitters further transmits the public key.

A vertically-adjustable gantry assembly installation adapted for removal or placement of a train bridge-span of the type which spans and is supported by two piers, comprises a gantry assembly positioned on load-bearing first ground-support locations, the gantry assembly comprising a gantry and a ground-engaging vertical support and lift system, the vertical support and lift system adapted for supporting a combined weight of the gantry and a bridge span in at least one operational vertical position above respective bridge span support-surfaces of the piers including a position corresponding to a disembarking plane in which the leg portions are extended from a stowed position to an extent at least sufficient for the gantry assembly to self-liftoff the pre-installation conveyance system onto the first ground-support locations to effect the gantry assembly installation.

The invention relates to a single plate force-bearing reinforcing method of a hollow slab bridge. The single plate force-bearing reinforcing method includes that the original bridge deck pavement is shoveled, hinge joint concrete is removed, defects and cracks of the original hollow slab bridge beam body are processed, strip-shaped steel plates are transversely pasted on the upper surface and the lower surface of the hollow slab bridge in the longitudinal bridge direction at certain intervals, split screws penetrate through drilled holes at the hinge joint position, a counter-force frame is arranged, a wedge-shaped block is embedded between the counter-force frame and the steel plates, and the steel plates are pressurized and pasted in sealing mode and then are positioned and fixed; the counter-force frame is demounted after sticky steel glue is cured; cavities in beam joints are subjected to pressure grouting, shear reinforcements are placed into the top surface of a hollow slab, a reinforcement mesh is reconstructed, and the bridge deck reinforcement mesh and the implanted reinforcements are connected in binding or point welding mode to form a whole body; steel fiber reinforced concrete is poured and waterproof coatings are sprayed; and bituminous concrete is paved. The single plate force-bearing reinforcing method improves transverse load distribution, steel plate pasting reliability and bridge integral force-bearing performance on the premise of preventing hollow slab beam body damage, not changing a structural force-bearing system and not interrupting the traffic.

The invention discloses a widening and reinforcing structure for a concrete box girder bridge and a method for constructing the same. The widening and reinforcing structure comprises a new box girder I and a new box girder II which are parallel with the original box girder bridge and are positioned at two sides of the original box girder bridge; and the box girder of the new box girder I and the box girder of the new box girder II are in rigid connection with box girder flanges of the original box girder bridge. The new box girders share part of the load of the original box girder so that the internal force and the deformation (or the stress of a control point) of a controlled cross section of the original box girder bridge are reduced by about 20 percent; and the generation and the development of cracks on a crest slab, a bottom plate and a web plate of the original box girder bridge can be effectively inhibited. The widening and reinforcing structure is simple, has slight damage to the original box girder bridge, and does not increase obvious structure deadweight substantially. The method for widening and reinforcing constructions is simple and convenient; the reinforced concrete box girder bridge has a reliable structure; the construction period is relatively short; the impact on the road traffic is relatively small; and the damage to the natural environment and the bad social impact caused by the demolition of an old bridge are avoided, thus the method has good comprehensive technical, economic and social benefits.

The invention relates to a durability traceless repair method for road and bridge concrete. The method comprises the following steps of: (1) repairing a base surface of the concrete with a surface defect by using a repairing material so as to trim and flatten the base surface, wherein the repairing material comprises polymer fine sand mortar and color difference trimming putty; (2) performing prime coat on the repairing material; (3) preparing a trimming material, wherein the structure and color of the trimming material are similar to those of the concrete, and the trimming material has a high adhesive property; (4) performing floating coat by adopting an organic silicon resin coating; and (5) performing top coat by adopting a coating prepared from a silicon resin accessory ingredient. The formulas of the color difference trimming putty and the trimming material are introduced. The method has the advantages of effectively repairing the surface defect of the concrete structure tracklessly, restoring the strength of the concrete structure and improving waterproof property and durability of the concrete structure.

The invention relates to a novel seismic mitigation and absorption support comprising a support body, an upper connection steel plate and a lower connection steel plate, wherein the upper connection steel plate and the lower connection steel plate are arranged at the upper/lower part of the support body, the support body is connected with the upper/lower connection steel plate through a sliding mechanism or a rolling mechanism in a sliding manner, the upper/lower side surface of the upper/lower connection steel plate is provided with a sleeve and an anchoring bolt, and the lower/upper side surface of the upper/lower connection steel plate is provided with a limiting stop block for limiting the horizontal sliding of the support body; and a connecting mechanism for mounting a pull rod is arranged on the circumferences of an upper steel plate and a lower steel plate of the support body. According to the novel seismic mitigation and absorption support disclosed by the invention, the friction coefficient of the support body and the upper/lower connection steel plate is small so that the removal and the change are easy; due to the limitation of the limiting stop block, the support body does not generate the horizontal sliding during regular use and does not interfere the shearing deformation of rubber in the support as well; and a change method of the support is simple, convenient and safe in operation, is not limited by the site condition, does not need to use large-scale jacking devices, has a short change periodand high efficiency and is low in cost.

The invention discloses a reinforcing method of a masonry arch bridge, which comprises the following steps of: a, planting ribs on an arch ring of the arch bridge along the cambered surface direction of the arch bridge; b, planting ribs at the position close to the two sides, on the circular arc surface of the arch ring along the cambered surface direction of the arch bridge; and c, forming symmetrically distributed reinforced concrete ribs along the distribution direction of the planted ribs in the step a and the step b in a way of casting molding, wherein the cross section of the reinforcedconcrete ribs is L-shaped. The reinforced concrete ribs which are of integral structures are formed along the two sides of the arch ring in the way of planting the ribs and casting concrete, then load can be directly transferred to an arch base through the symmetrically distributed reinforced concrete ribs of which the cross section is L-shaped, and the stress to the reinforced concrete ribs is equal to that to a ribbed arch bridge. When the method is compared with the method of singly increasing the area of the arch ring, the dependence on the primary arch ring is smaller, even the primary arch ring can be supported, the damage to the primary arch ring is small, the requirement of increasing the loading capacity of the masonry arch bridge is met, and the damage to the primary old arch ring is avoided to the maximal degree.

The invention provides an epoxy resin-based rapid repair material and a preparation method thereof. The epoxy resin-based rapid repair material is made of sand, talcum powder, epoxy resin, polyamide and thinner. The preparation method comprises:) uniformly mixing epoxy resin and diluent, adding polyamide and stirring uniformly to form epoxy slurry; mixing sand and talc powder uniformly; stirring epoxy slurry evenly with the mixture of sand and talc powder; Oxygen resin-based rapid repair materials can achieve moderate cost, early strength (3d can reach 60MPa) but moderate later strength, good bonding, convenient construction, short construction period, and no need to close traffic. It can be used for repairing concrete buildings such as bridges, tunnels, roads and houses.

A pavement repair system utilizing solid phase auto regenerative cohesion and homogenization by liquid asphalt oligopolymerization technologies. The system is suitable for use in repairing asphalt pavement, including pavement exhibiting a high degree of deterioration (as manifested in the presence of potholes, cracks, ruts, or the like) as well as pavement that has been subject to previous repair and may comprise a substantial amount of dirt and other debris (e.g., chipped road paint or other damaged or disturbed surfacing materials). A system utilizing homogenization by liquid asphalt oligopolymerization is suitable for rejuvenating or repairing aged asphalt, thereby improving properties of the paving material.

The invention relates to a reinforced concrete rectangular column reinforcing method, drilling small holes in the reinforcing region of the rectangular column, planting rib materials, winding FRP cloth onto the surface of the rectangular column and forming transverse restriction to the concrete column, where connecting drawknots are arranged to connect the rib materials with FRP cloth, so as to restrict lateral expansion deformation of the FRP cloth and improve the restriction to the in-column concrete, and the planted rib materials are wire materials with a certain compressive strength, and the FRP cloth is unidirectional, bidirectional or multiangular fiber reinforced composite cloth. And it is mainly applied to the reinforcing field of reinforced concrete structures and used to improve anti-seismic tensility of the reinforced concrete rectangular column.

The invention relates to a sling replacement method for a suspension bridge, which comprises the following steps of: arranging a temporary cable clamp on a main cable of the suspension bridge; erecting auxiliary slings on the temporary cable clamp; arranging a main pull rod on an erection hole, screwing a nut on the end part of the main pull rod, inserting small pull rods into four hole positions on the two sides of a base plate, and arranging bolt pullers or jacks on the end parts of the small pull rods; starting the tensioning of the bolt pullers or the jacks, continuously knocking a pin shaft in a lower lug of an old sling until the pin shaft is knocked out, and screwing the nut on the main pull rod; lifting the original sling, knocking the pin shaft out of an upper lug of the old sling, taking the original sling down, and arranging a new sling by using the method contrary to the method for dismantling the old sling; after the new sling is arranged, unscrewing the nuts on the bolt pullers or jacks, releasing pressure, unscrewing the nut on the main pull rod, and repeating the operations until the new sling is completely tensioned; and dismantling the auxiliary slings, the base plate, the main pull rod, the small pull rods and the temporary cable clamp. The sling replacement method for the suspension bridge is convenient to construct, safe and reliable.

A movable multi-view visual bridge conventional detection method includes the following specific implementing steps that A, an unmanned aerial vehicle device is erected, parameters are set, and a vehicle-mounted device is calibrated; B, a bridge structure three-dimensional model is scanned and established, and a flight route is determined; C, bridge conventional scanning and detection are conducted, and appearance pictures are transmitted and stored; and D, the bridge state is evaluated, and multimedia diagnosis is summarized.

The invention relates to a bridge reliability predicting method and a maintenance method of a bridge. The bridge reliability predicting method comprises the following steps: (1) monitoring the limit state of bearing capacity: (1-1) monitoring the limit state of bending bearing capacity of a mid-span front section; (1-2) monitoring the limit state of the shearing bearing capacity of a fulcrum oblique section; (2) monitoring a normal use limit state: (2-1) measuring bridge crack width; (2-2) monitoring a deflection limit state; (3) monitoring a limit state of reinforcement stress; (4) monitoring a limit state of concrete stress; (5) comparing monitoring data with preset data according to the monitoring data obtained in step (1) to step (4), thus obtaining bridge reliability. Through carrying out research on a bridge preventive maintenance model based on bridge material fatigue degradation and structure reliability decay prediction, a bridge material fatigue degradation rule and influence factors and an influence rule of the bridge structure reliability decay are explored, and a decay rule of the bridge material fatigue degradation along with time and a prediction method of the residual life of the bridge are summarized.