122results about "Bridges" patented technology

The invention relates to hybrid fiber reinforced ultrahigh-performance geopolymer concrete as well as a preparation method and application thereof. Slag, metakaolin and silica fume are used as precursor materials of geopolymer concrete, a sodium hydroxide-water glass solution is adopted to compound an alkali activator, and steel fibers, polyvinyl alcohol fibers and modified glass chopped fibers of different sizes are mixed and doped, so that the brittleness of the geopolymer concrete is remarkably improved, and the service life of the geopolymer concrete is prolonged. The early strength and the high temperature resistance are improved. The hybrid fiber reinforced ultrahigh-performance geopolymer concrete has the characteristics of low carbon emission, ultrahigh strength, high temperature resistance, high durability and the like, and can meet the use of the geopolymer concrete in actual engineering. According to the ultrahigh-performance geopolymer concrete, solid waste resources are utilized at the same time, carbon emission in the concrete production process is reduced, and the ultrahigh-performance geopolymer concrete is environmentally friendly, low in carbon, ultrahigh in strength, easy to prepare and capable of being suitable for complex environmental engineering structures such as tunnels, bridges and high-rise buildings.

The invention provides a soil settlement monitoring method and system, and belongs to the field of soil monitoring, and the method comprises the steps: dividing a monitoring region into a plurality of non-uniform three-dimensional grid units, and determining the risk levels of the three-dimensional grid units through a geological parameter critical value and a spatial proximity effect, the risk levels being high, medium and low; sensor groups are set for the three-dimensional grid units divided into the risk levels, data of the sensor groups are collected in real time, and the sensor groups specifically comprise vibrating wire settlement meters, pore water pressure sensors, throw-in type water level meters and MEMS tilt angle sensors; and inputting the real-time feature vector obtained by each three-dimensional grid unit into a trained XGBoost-Light model, and carrying out early warning and response of different levels according to the output risk levels. According to the soil settlement monitoring method and system provided by the invention, the accuracy of soil settlement monitoring is improved.

To provide a system and method that safely carbonates a concrete structure with high efficiency and can easily estimate a carbonation degree.SOLUTION: The system comprises a carbon dioxide source, a pump, a first flow meter and a first concentration meter. The carbon dioxide source is constituted to store carbon dioxide contained gas. The pump is constituted to convey the carbon dioxide contained gas. The first flow meter and the first concentration meter are constituted to measure a flow rate of the carbon dioxide contained gas and a carbon dioxide concentration, respectively. The pump, the first flow meter, and the first concentration meter form a circulation path of the carbon dioxide contained gas by connecting them to each other. The carbon dioxide source is arranged on a first flow path branched from the circulation path. The circulation path is constituted to penetrate a concrete structure.SELECTED DRAWING: Figure 1A

The utility model provides a cross-section-variable box girder midspan bottom plate transverse prestress structure, and belongs to the technical field of box girder construction. Comprising a top plate, flange plates are arranged on the two sides of the top plate, top plate transverse prestressed steel beams are arranged below the top plate, vertical prestressed tendons and webs are arranged between the top plate and the flange plates, and bottom plates are connected to the lower portions of the vertical prestressed tendons and the webs and provided with bottom plate transverse prestressed steel beams and bottom plate longitudinal prestressed steel beams. And the bottom plate transverse prestressed steel beams and the bottom plate longitudinal prestressed steel beams are tensioned. By applying transverse prestress to the midspan bottom plate of the variable cross-section box girder, splitting force and other transverse force generated by longitudinal prestress of the bottom plate are eliminated, the bottom plate is prevented from generating longitudinal cracks, and it is guaranteed that the structure is safe and durable; diseases such as cracking and overlarge downwarping of the variable cross-section box girder can be greatly avoided, and the service life of the structure is prolonged.

The invention provides a bridge deflection reconstruction method and system based on time multi-scale feature fusion, relates to the technical field of micro expression recognition, and aims to solve the problems that the existing monitoring technology is easily influenced by environmental variables, only depends on long-term stable reference points, is inaccurate in monitoring data and is low in model reconstruction precision. The method comprises the steps of obtaining health monitoring data of a bridge, wherein the health monitoring data at least comprise strain data and vibration data; preprocessing the health monitoring data; inputting the preprocessed strain data and vibration data into a strain feature extraction module and a vibration feature extraction module respectively, and extracting strain features and vibration features respectively; and inputting to a fusion feature extraction module for fusion to obtain a reconstruction deflection. According to the method, the problems that the method is easily influenced by environmental variables and can only depend on long-term stable reference points are solved, the limitation of a traditional monitoring means is avoided, and accurate reconstruction of the bridge deflection is achieved under the condition that extra hardware cost is not increased.

To provide a hollow form for a precast segment girder and a manufacturing method of the precast segment girder, which can efficiently manufacture a cross section reverse U-shaped precast segment girder capable of easily recognizing aging degradation by visual inspection, a static image, a moving image or the like.SOLUTION: A hollow form 100 for a precast segment girder is for forming a hollow part (21) of a cross section reverse U-shaped precast segment girder (2) where an opening groove (22) is formed by opening a lower part of the hollow part (21) like a groove. The hollow form 100 is partitioned into multiple narrower width pieces than the width of the opening groove (22), and is constituted to be able to remove a form by extracting each piece among the multiple pieces of the hollow form 100 from the opening groove (22) after concrete placing.SELECTED DRAWING: Figure 6

The utility model belongs to the technical field of steel structures, and particularly relates to I-shaped steel for a bridge, which comprises an I-shaped steel body, a plurality of holes are uniformly distributed on a web of the I-shaped steel body, and foamed aluminum is filled in each hole. A plurality of reinforcing ribs are further arranged on a web of the I-shaped steel body, the reinforcing ribs and the holes are distributed in a staggered mode, every two adjacent I-shaped steel bodies are connected through a connecting mechanism, the holes are of a hexagonal structure and evenly divided into a plurality of groups, and the multiple groups of holes are evenly distributed in the length direction of the I-shaped steel body. The plurality of groups of holes and the plurality of reinforcing ribs are alternately distributed; according to the utility model, the plurality of holes are formed in the I-shaped steel body, and the foamed aluminum is filled in each hole to form a'metal framework + core material 'composite structure, so that compared with a solid web, the weight is reduced by 25%-30%, and the flexural rigidity is improved at the same time; the adjacent I-shaped steel is connected through the connecting mechanism, and detachable connection is achieved.

The present invention improves the wind resistance performance of a long-span bridge using a bridge girder comprising two end main box girders or two end main I-shaped girders. The bridge structure of the present invention comprises a bridge girder 13 having a deck slab 21 and a main girder 22 that includes I-shaped girders 23, 24 or box girders supporting the deck slab 21 from below at both ends in the width direction of the deck slab 21, the bridge structure being characterized in that the span length of the bridge girder 13 exceeds 100 m, the total width of the bridge girder 13 is 15 m or less, the height of the main girder 22 is 1.2 m or more, the ratio W1 / H3 of the total width W1 of the bridge girder 13 to the height H3 of the main girder 22 is seven or more, and a steel material with a yield strength of 380 N / mm2 or more is used for at least a lower flange of the main girder.

The invention relates to a floating functional unit, in particular a floating platform (1) or a watercraft, comprising a deck structure (2) and one or more buoyancy bodies (3a, 3b, 3c, 3d), one or more of the buoyancy bodies each comprising a rotor blade (4) or a part, in particular a longitudinal portion, of a rotor blade of a wind turbine. The invention further relates to such a buoyancy body and to a method for the production thereof from a rotor blade.

The utility model discloses an existing railway underneath passing frame structure bridge structure which comprises a plurality of frame structure bridge outer cylinder sections which are connected in series along the axis to form an outer cylinder unit, and no partition or partition exists in a cylinder body of the outer cylinder unit. A plurality of frame-structure bridge inner cylinder sections connected in series along the axis form an inner cylinder unit, the inner cylinder unit is arranged in a cylinder body of the outer cylinder unit in a penetrating mode, the interior of each frame-structure bridge inner cylinder section is divided into a plurality of inner cylinder subareas through inner cylinder plate bodies, the cylinder body of each frame-structure bridge inner cylinder section is provided with a plurality of grouting hole channels, and the grouting hole channels communicate with the inner side and the outer side of the corresponding frame-structure bridge inner cylinder section. The structure can be applied to a jacking type construction method of a large-span frame structure bridge structure, in the jacking type construction process, a construction and unearthing machine advances in the outer cylinder section of the frame structure bridge in a barrier-free mode, and the construction efficiency is improved. The frame structure bridge inner barrel section which is separated and completed in advance can be transferred to the preset position in the frame structure bridge outer barrel section, and the construction period is greatly shortened.

The invention relates to the area of transport communications, particularly, to the aboveground (elevated) complex transport systems of string type, which provide high-speed cargo and passenger traffic. Transport system by Yunitski includes track structure (4) tensioned above foundation (1) in spans (2) between supports (3), which comprises aggregated extended body (5), consisting of bearing part (6), containing prestressed load-bearing member (7), and of rail cord (8) connected with it, having rolling surface (A) for motion of vehicle (9) mounted thereon. In bearing part (6) of extended body at height H, m, having variable value in span (2) between supports (3), load-bearing member (7) is fastened, with use of means of reciprocal movement and fixation of arrangement, whereas rail cord (8) is equipped with, at least, two extended longitudinal guide plates (11) of height h, m, positioned axisymmetrically to its longitudinal axis X at distance L from each other, equal to the width of bearing part of extended body. Bearing part and rail cord are configured to be reciprocally moving along the vertical Z and afterfixing to each other at design height P, m, defined by the respective dependence. As a result, high precision of positioning of rolling surfaces (A) of rail cord (8) relative to load-bearing member (7), is achieved.

A manufacturing mold and construction method for setting a catch basin inside a precast box girder. The manufacturing mold includes: an inner mold of the precast box girder, an outer mold of the precast box girder, a steel bar structure of the precast box girder, and a catch basin mold; the catch basin mold includes: a top mold of the catch basin, a bottom mold of the catch basin, two end molds of the catch basin, and a neck mold of the catch basin. The top mold of the catch basin is detachably connected to the bottom mold of the catch basin. The two end molds of the catch basin are respectively arranged at both ends of the top mold of the catch basin and the bottom mold of the catch basin. A catch basin opening is formed on the top mold of the catch basin. The neck mold of the catch basin is arranged at the catch basin opening and extends outward from the catch basin opening. The catch basin mold forms a mold for the main structure of the catch basin. The detachable connection method between the top mold of the catch basin and the bottom mold of the catch basin is conducive to the assembly and disassembly of this mold, improves the turnover rate of this mold, and further improves the construction efficiency.

The invention relates to an emergency pedestrian bridge system characterized by three types of platform modules, mechanically linked together by means of hooks, resting on supports formed by tubular posts that offer minimal resistance to any potential flood current and that are fitted into a tube articulated to a platform to lock its deployment. This platform can slide vertically along the post to a desired height, so that the platform, thus positioned, adjusted, and locked, allows pedestrians to cross over an impassable area safely, with a passage width sufficient for two people to pass each other and for a person with reduced mobility to move around. Due to its weight and dimensions, as well as its quick assembly, adjustment, and locking mechanism, the system can be easily deployed by two operators in difficult and varied conditions.Figure for the abridged version: Fig.1.

To provide an anticorrosive coating structure that has a metal substrate with an anticorrosive face, of which a part is coated with a corrosion-proof metal and another part is coated with a zinc-rich coating layer, wherein the corrosion-proof metal is protected from zinc embrittlement cracking even when the corrosion-proof metal is welded, and a steel member including the anticorrosive coating structure.SOLUTION: An anticorrosive coating structure 10 includes a corrosion-proof metal 16 that coats a part of an anticorrosive face 14 of a metal substrate 12, which requires corrosion protection, and a zinc-rich coating layer 18 that coats another part of the anticorrosive face 14. Between the corrosion-proof metal 16 and the zinc-rich coating layer 18 on the anticorrosive face 14, a separation region 14A is provided to separate them. A primer coating layer 20 is also provided to coat the separation region 14A.SELECTED DRAWING: Figure 1

The utility model discloses a curve type overline foot bridge structure which comprises a curve type overline main bridge, a first arc-shaped approach bridge, a second arc-shaped approach bridge and an arc-shaped ramp communicated with the second arc-shaped approach bridge, the first arc-shaped approach bridge and the second arc-shaped approach bridge are connected to the two ends of the curve type overline main bridge respectively, and the curve type overline main bridge comprises a plurality of continuous steel box girders connected in sequence. Each of the first arc-shaped approach bridge, the second arc-shaped approach bridge and the arc-shaped ramp comprises a double-cantilever box-type structural section and a gravity type retaining wall structural section, and an intersection connecting section of the double-cantilever box-type structural section of the arc-shaped ramp and the second arc-shaped approach bridge is a counterfort type retaining wall structural section. According to the cross-line main bridge, the counterfort type retaining wall structural section is used as the intersection connecting section, so that the connecting stability and strength of the intersection connecting section can be enhanced, and the double-cantilever box type structural section is combined with the continuous steel box girder of the curved cross-line main bridge; the reliable connection of the first arc-shaped approach bridge and the second arc-shaped approach bridge with the curved line-crossing main bridge can be ensured.

The invention relates to the technical field of rail transit, in particular to a method for designing a high-speed railway bridge with in-beam travelling, which comprises the following steps: determining the clear width and clear height of a box beam chamber, keeping the clear width and clear height of the box beam chamber constant along the length direction of the bridge, and arranging a rail on a bottom plate of the box beam; according to the designed running speed of the train and the clear width and the clear height of the box girder cavity, simulation analysis is conducted on the aerodynamic effect in the box girder cavity for the most unfavorable working condition when the train runs; according to simulation analysis results of the mechanical effect and the aerodynamic effect of the train, stress analysis is conducted on the box girder in software, then the theoretical thickness of a box girder bottom plate, a box girder web and a box girder top plate is determined, and design is completed. According to the design method, the defects that in the prior art, when a train runs in a box girder, the aerodynamic effect of an inner cavity of the box girder is obvious, stress of all positions of the box girder cavity is different, but no corresponding design method exists at present are overcome.

The application discloses a kind of single-box three-chamber cross-section girder bridge shear lag effect analysis method, belong to bridge construction control technical field.The method includes the following steps: S1. with quadratic parabola function to build shear lag warping displacement function, select the coordinate at the location of half of box girder section, i.e. the wing plate longitudinal displacement function of single-box three-chamber thin-walled box girder considering shear lag effect is obtained;S2. calculate the normal strain and shear strain of upper and lower wing plate and web of thin-walled box girder;S3. calculate the strain energy of upper and lower wing plate and web of thin-walled box girder;S4. calculate the total potential energy of single-box three-chamber girder system;S5. according to the principle of minimum potential energy, simplification is carried out using the method of partial integration, and the control differential equation set and boundary conditions of single-box three-chamber thin-walled box girder considering shear lag effect are obtained.The application discloses a kind of single-box three-chamber cross-section girder bridge shear lag effect analysis method, and the prediction result of main girder stress and deformation is more in line with actual situation, improves the accuracy of single-box three-chamber cross-section girder bridge construction process, and higher safety.

The utility model belongs to the technical field of viewing decks, and particularly relates to a large-cantilever viewing deck which is formed by continuously welding a plurality of steel box girders. The steel box girder comprises a bottom plate, a side plate is welded to the upper end of the bottom plate, a top plate is welded to the upper end of the side plate, a rear plate is fixedly welded to the rear ends of the top plate and the side plate, and a partition plate is welded to the bottom plate. Through the internal structural design of the steel box girders, the large-cantilever viewing platform has high strength and rigidity, the structural strength and safety of the large-cantilever viewing platform are ensured, and due to the fact that the steel box girders can be transported section by section, the transportation difficulty is reduced.

The utility model relates to the technical field of small box girders, in particular to a UHPC small box girder structure which comprises a first small box girder, the first small box girder comprises a top plate, web plates and a bottom plate, and the web plates are fixedly connected to the positions, close to the edges of the two sides, of the lower surface of the top plate. Third reinforcing steel bars of the first small box girder and the second small box girder are staggered in a groove which is formed by the connecting half grooves and has a semicircular section, and meanwhile, the partition plate is matched with the baffle to be clamped at the connecting position of the first small box girder and the second small box girder, and slurry is blocked by the baffle to enter the partition plate during filling; the connecting position of the first small box girder and the second small box girder is reinforced through the partition plate, so that the connecting position of the first small box girder and the second small box girder is more reliable, and the construction difficulty is not increased when the partition plate and the connecting semi-groove are filled together; the end plate is matched with the web positions of the two first small box girders to form a mold, slurry is added from the grouting holes, and pouring can be completed in the end plate.

To provide a measurement device and a measurement method that can efficiently measure the distance from a virtual surface of a concrete non-placement region to an object member in the non-placement region.SOLUTION: A measurement device 100 comprises: an aluminum square pipe 11 which is built in parallel with a virtual surface 10 of a concrete non-placement region s; and a gauge part 20 which is so provided on the aluminum square pipe 11 as to measure the distance from the virtual surface 10 to a stirrup reinforcement 5a in the non-placement region S along a normal direction of the virtual surface 10.SELECTED DRAWING: Figure 5

The present invention relates to a π-shaped truss-web steel box-concrete composite beam bridge; it comprises a box-type structure truss group, a steel crossbeam, an upper flat joint, a lower flat joint, a shear nail group, a bridge deck and a wet joint bridge deck, the box-type structure truss group is composed of a main truss web member connecting a main truss upper chord and a π-shaped main truss lower chord through a node plate, and the trusses are connected to form a truss group; the truss groups are connected by a steel crossbeam, and the steel crossbeam diagonal web member is connected to the π-shaped crossbeam upper chord and the π-shaped crossbeam lower chord through a node plate; multiple π-shaped crossbeam upper chords and π-shaped crossbeam lower chords are sequentially connected through an upper flat joint and a lower flat joint. The device improves the structural strength, rigidity and stability, is easy to design and construct, and makes the structure more reasonably stressed.

The invention discloses a single-slope open-web steel box girder and a manufacturing method thereof, and relates to the technical field of steel box girders. The bottom plate unit is located below the top plate unit, and an assembly space is reserved between the bottom plate unit and the top plate unit; the web unit is arranged between the top plate unit and the bottom plate unit; the partition plate units are arranged between the web plate units; and the tuyere block body is arranged at one end of the assembly space. The invention further discloses a manufacturing method of the single-slope open-web type steel box girder. The technical problems that in the prior art, an open-web type steel box girder is complex in structure, large in dead weight and high in cost are solved.

The application relates to the technical field of bridge structures, and discloses a large-span continuous wave-shaped web steel-concrete composite box girder structure, a box unit comprises a bottom plate unit, web units symmetrically and longitudinally distributed on both sides of the upper end of the bottom plate unit, and a plurality of groups of spacing-keeping and transversely distributed baffle units arranged at the upper end of the bottom plate unit; an intermediate reinforcing assembly is arranged in the box unit, the intermediate reinforcing assembly comprises longitudinal reinforcing pipe fittings centrally penetrating the plurality of groups of baffle units, transversely reinforcing rod fittings fixedly penetrating between the web units, square locking fittings fixedly connected at the longitudinal reinforcing pipe fittings and the transversely reinforcing rod fittings, and corner reinforcing fittings connected at four corners of the square locking fittings; the wave-shaped web of the application does not need additional stiffening ribs, the shear resistance, the buckling resistance and the toughness are improved, and the fatigue damage is reduced; the longitudinally and transversely intersecting intermediate reinforcing assembly forms a global reinforcing network, the overall bearing capacity and the anti-deformation capacity of the box girder are improved, local stress concentration is avoided, and the service life of the bridge is prolonged.

The application discloses a folding auxiliary marking tape group for large-span bridge space form scanning, each marking tape group comprising a plurality of marking tape devices of the same structural unit, each marking tape device comprising a marking tape, a first rotating connecting piece, a flip cover, a second rotating connecting piece and a fixing support, the marking tape being connected with the first rotating connecting piece, the first rotating connecting piece being fixed on the lower surface of the flip cover, one end of the second rotating connecting piece being fixed on the side surface of the flip cover and the other end being fixed on the fixing support, the fixing support being installed on a steel plate, and the steel plate being arranged between the main girder bottom plate of the large-span bridge and the I-beam of the inspection vehicle track beam. The marking tape is installed on the steel plate of the main girder bottom plate of the large-span bridge, the inclination angle of the marking tape can be adjusted, more reflection surfaces with better reflection effect and smaller incidence angle are provided for incident laser, the intensity loss of the incident laser is smaller, and the quality of the scanning points of the three-dimensional laser scanner is improved.

The invention relates to an emergency pedestrian bridge system characterized by three types of platform modules, mechanically linked together by means of hooks, resting on supports formed by tubular posts which provide a weak grip against a possible flood current and which are fitted into a tube articulated to a platform to lock its deployment. This platform can slide vertically on the post at a desired altitude, so that the platform thus arranged, adjusted and locked, allows pedestrians to pass over an area made impassable, in safe conditions and with a passage width sufficient to allow two people to cross and a person with reduced mobility to move around. By its weight and size, as well as its principle of rapid assembly, adjustment and locking, the system allows its easy deployment by two handlers in difficult and varied conditions.Figure for abstract: Fig.1.

The invention relates to the technical field of water conservancy projects, and discloses a high seismic intensity area and reservoir area bridge scheme comparison and selection method and system, and the method comprises the steps: building a multi-field coupling model based on the earthquake, landslide and large water level rise and fall, and obtaining a safety index, a function index and an ecological index in SPI values of a comprehensive performance index SPI based on the multi-field coupling model; establishing a dynamic full-life-cycle dynamic LCC model; an improved NSGA-III algorithm is adopted, optimization is carried out to generate a plurality of initial candidate schemes by taking minimization of the LCC value of the dynamic full-life-cycle dynamic LCC model, maximization of the comprehensive performance index SPI and minimization of carbon emission as multiple objectives, and an optimal candidate scheme is screened from the initial candidate schemes in combination with TOPSIS multi-attribute decision, the comprehensive performance index SPI comprises a safety index, a functional index, an ecological index and a cultural index. According to the method, the slope instability probability is reduced by arranging the multi-field coupling model based on earthquake, landslide and great water level rising and falling.

To reduce a vertical length of a suspension-type sound reduction device without lowering its sound reduction performance.SOLUTION: In a cylindrical suspension-type sound reduction device 10 forming a noise passage part 4 at a lower part of an opening part to a viaduct provided with the opening part on a floor surface, a plurality of projecting plates 5 forming slits 11 along a direction orthogonal to its longitudinal direction are projected from a cylindrical suspension-type sound reduction device main body 3 toward the noise passage part 4 at a part in the longitudinal direction of the noise passage part 4, and a sound absorbing material 6 is attached to an inner surface of the suspension-type sound reduction device main body 3 at a remaining part in the longitudinal direction of the noise passage part 4.SELECTED DRAWING: Figure 5

The application discloses a bridge state reliability evaluation method based on an adaptive Gaussian process model, and is applied to the technical field of bridge state evaluation.The method comprises the following steps: acquiring bridge WIM data and bridge response monitoring data; extracting WIM peak values and response peak values; repairing historical data by using a GPM; training the GPM by using an adaptive moving window training strategy; repairing missing values of modeling data; storing probability modeling results of the response peak values; performing probability modeling on all steps of modeling data of a current sensor; performing probability modeling on modeling data of all sensors; and calculating reliability indexes of bridge components and structures.The method realizes self-repairing of missing values of bridge WIM peak values and response peak values by using the powerful nonlinear regression capability of the GPM, and proposes the adaptive moving window training strategy, so that the training efficiency is greatly improved under the premise that the accuracy is hardly reduced.

The utility model discloses a bridge reinforcing type steel box girder structure, and relates to the technical field of steel box girders. The steel box girder reinforcing device comprises a first fixing block 101, a fixing mechanism is arranged in the first fixing block 101, and a positioning reinforcing mechanism is arranged on the outer wall of the first fixing block 101. By arranging a bidirectional threaded rod, when a steel box girder is reinforced, a worm can be rotated at the moment, then the worm can drive worm wheels on the two sides to rotate, and therefore the steel box girder reinforcing device can be used for reinforcing the steel box girder. Then worm wheels drive bidirectional threaded rods to rotate, then the bidirectional threaded rods on the two sides drive clamping plates on the surfaces to linearly slide on the surfaces of first limiting rods, the clamping plates on the two sides drive first telescopic springs and pressure blocks to gradually move towards the two sides of the steel box girder, and at the moment, the first telescopic springs are in a stretching state; and then, when the pressure blocks on the two sides make contact with the two sides of the steel box girder, the clamping plates continue to be moved, then the first telescopic springs can be gradually compressed, opposite force is generated, and when the proper tightness degree is adjusted, fixing can be completed.