972results about "Arch-type bridge" patented technology

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 through steel box tied arch bridge construction monitoring system and method. The system comprises a data acquisition module, a data processing and analysis module, a control decision module and an information management and feedback module. The data acquisition module acquires data such as a girder, an arch rib, a suspender and an environment; the data processing and analysis module analyzes the structure state after preprocessing the data, identifies parameters and corrects the model; the control decision module generates a control instruction, and performs early warning and emergency processing; and the information management and feedback module stores data and feeds back information. The method comprises preparation before construction, construction process monitoring and abnormal condition processing. Construction can be accurately monitored in real time, the quality and safety of finished bridges are ensured, error accumulation is reduced, data are provided for later maintenance, the durability of the bridges is improved, and the method is suitable for through steel box tied arch bridge construction monitoring.

The present disclosure belongs to the technical field of arch bridge structures, and particularly relates to a steel-concrete combined skewback structure and a construction method thereof. In the present disclosure, by arranging arch rib tubes, concrete sections in a main chord pipe, concrete blocks in a skewback, fixing steel tubes, a transverse diaphragm unit, and a vertical diaphragm unit, the steel-concrete combined skewback structure can achieve the following objectives that 1. the skewback structure can be fully connected with a bearing platform; and 2. the fixing steel tubes are fully filled with concrete. In addition, the present disclosure further provides the construction method of the above steel-concrete combined skewback structure. The construction method the skewback structure itself and its mounting manner both have sufficient structural stability.

The invention relates to a double-layer steel truss arch bridge mounting process. The double-layer steel truss arch bridge mounting process is characterized by comprising the following specific mounting processes: S1, field arrangement; s2, mounting on-shore and in-water temporary piers; s3, assembling the truss pieces and the bridge deck system; s4, mounting a main beam; s5, mounting an arch rib bracket; s6, assembling the arch ribs; s7, arch rib installation; and S8, the temporary structure is dismantled, and construction is completed. The construction sequence of mounting on-shore and in-water temporary piers, assembling truss pieces and a bridge deck system, mounting main beams and mounting arch ribs is sequentially carried out on the double-layer steel truss arch bridge, temporary support sets are adopted for auxiliary construction in the construction process of the main beams, and the laying sequence of the main beams is fully combined with the composition and erection positions of temporary supports; the main beam is laid in the side span direction by taking the revetment as a reference, so that the temporary support and the main beam are laid more scientifically; in addition, during installation of the arch rib sections, hoisting is carried out in the mode that the two ends are firstly arranged and then the middle is arranged, and safety and stability during installation of the arch rib sections are guaranteed.

The invention provides a detection device based on overall lateral rotation of main and auxiliary double-limb arch ribs and a use method of the detection device, and belongs to the technical field of arch rib construction detection, a transverse movement detection frame module is connected with a tower frame module through a telescopic fixed net frame module, and the upper portion of the transverse movement detection frame module is slidably connected with a double-limb arch rib module. Movement of the control device is automatically adjusted through the first positioner, the operation procedure of in-place installation is facilitated, and whether the rotating hinge base at the direct stress position deforms or not is analyzed and judged by analyzing information of the distance between the rotating hinge base and the arch support and information of the distance between the rotating hinge base and the tensioning base in the side rotating process so that the state of the double-limb arch rib module can be judged; according to the method, the two ends of the arch foot rotating seat shaft serve as rotating shafts, the arch rib assembled in the flat state is laterally rotated to the mounting position, compared with a traditional beam-first-arch-second hoisting method, only fewer temporary facilities are needed for lateral rotation to maintain an arch rib mounting system, and mounting construction of an arch rib structure can be completed more efficiently at low cost.

This method is applicable to the technical field of bridge construction and provides a method for real-time monitoring and evaluation of the force-bearing state during the casting process of a steel-pipe concrete arch bridge. The solution involves identifying environmental background points in the RGB three-dimensional matrix for the entire bridge within the range between the maximum and minimum RGB values ​​in the local RGB three-dimensional matrix for the steel pipe, representing environmental background temperature points in the temperature information matrix, and identifying concrete pouring points based on whether the unit matrix condition for the temperature of the steel dome pipe is met. The system also obtains the horizontal axis of the pixel at the center of the poured liquid surface in the left and right half arches in a Cartesian coordinate system, divides the entire arch rib to be poured into 2n equal parts, and calculates the cross-sectional displacement response of each structure based on the cross-sectional displacement caused by the load action of each segment. This allows for real-time, efficient, and accurate observation of the difference in concrete liquid surface level on both sides, allowing for the structural response during pouring to be determined and reducing the construction risk of arch bridges.

The invention relates to an intelligent pushing monitoring system for a steel grid beam, and the system is characterized in that a data processing module constructs a processing system covering a data collection-washing-storage full link, and provides a high-confidence data base for an intelligent deviation rectification module; through synchronous monitoring of steel grid beam pushing distance, attitude parameters, guide beam front end elevation, temporary pier settlement and transverse and longitudinal corners by the geometric monitoring module, and through combination of data acquisition of stress deformation of key components by the structure monitoring module, omnibearing real-time monitoring of spatial geometric parameters and mechanical states in a construction process is realized. The intelligent deviation rectifying module receives the preprocessed geometric monitoring parameters in real time, automatically generates a jack stroke adjusting instruction and directly issues and executes the jack stroke adjusting instruction, one-key adjustment is achieved, the defects of operation delay and deviation rectifying discontinuity caused by manual calculation and segmented adjustment are overcome, the pushing synchronism control precision is effectively improved, and the working efficiency is improved. The stress balance of the beam body in the pushing process is guaranteed from the system level, and the safety risk is reduced.

The invention discloses a positioning and adjusting device for hoisting an arch rib of a steel pipe arch bridge, and belongs to the field of positioning devices. The device mainly comprises a positioning and adjusting device, the positioning and adjusting device comprises a left-right fine adjustment system, an up-down fine adjustment system is fixedly installed on the left-right fine adjustment system, and a steel pipe arch bridge arch rib bearing and fixing device is fixedly installed on the up-down fine adjustment system; according to the positioning and adjusting device for hoisting the arch rib of the steel pipe arch bridge, the safety risk during hoisting of the arch rib of the steel pipe arch bridge can be greatly reduced, and the offset precision of the arch rib during hoisting can be improved; meanwhile, the device is specifically divided into three systems, namely, a left-right fine adjustment system, an up-down fine adjustment system and a steel pipe arch bridge arch rib bearing and fixing device, and accurate deviation of the arch bridge can be achieved through close fit with an external lifting crane.

The utility model relates to a mounting type arch bridge main arch ring maintenance operation platform which comprises a walking system, a suspension system, a platform system and a platform lifting system. The walking system is provided with walking trolleys on the top faces of the two sides of the main arch ring respectively and can walk along rails arranged on the main arch ring, the suspension system is suspended on the two walking trolleys through a cantilever beam, platforms on the two sides of the platform system are located on the two sides of the main arch ring respectively, a lower platform is located below the main arch ring, and a winch of the lifting system is arranged on the suspension system. And the side platform and the lower platform are connected through a traction rope. The main arch ring maintenance platform is directly hung on a main arch ring and walks along the main arch ring, bridge floor traffic can be prevented from being affected, and constructors can carry out all-directional maintenance operation on the main arch ring on the platform.

The invention discloses a method for manufacturing an arched girder combined section of a super-large-section steel box arch bridge suitable for highway transportation. Comprising a manufacturing process method of an oversized arch foot steel straining beam rod piece of a parallelogram structure and an oversized arch foot steel arch rib rod piece of an octagonal structure and a process method for controlling the assembly size and the linear shape of an overall space structure of an arch foot steel straining beam and an arch foot steel arch rib. The arch foot steel straining beams of the parallelogram box type structures and the octagonal arch foot arch ribs are integrally manufactured, and the arch foot arch ribs and the arch foot straining beams are connected in a welded mode. According to the method, the complex structural characteristics of octagonal arch springing arch ribs and parallelogram irregular arch springing straining beams of the steel box arch bridge arch beam combination section are combined, the method that the plate units are manufactured firstly and then the box body is assembled is adopted, the tailor-welding size of each plate unit is controlled, and control over welding deformation and the overall size of the subsequent box body is facilitated; an integral horizontal pre-splicing method is adopted, and a matching piece welding method is adopted, so that the aim of controlling the spatial relationship between the arch springing, the arch rib and the straining beam is achieved.

The invention discloses a supporting device for reinforcing an arch bridge bottom die, and belongs to the technical field of arch bridge bottom dies. The supporting device comprises a base, first demolding plates are symmetrically arranged on the two sides of the upper end of the base, second demolding plates are arranged at the ends, away from each other, of the two first demolding plates, a first splicing plate is clamped between the first demolding plate and the second demolding plate on the same side, and a second splicing plate is clamped between the two first demolding plates; a lifting radian adjusting mechanism is arranged at the upper end of the base, and the heights and the radians of the first demolding plate and the second demolding plate are adjusted through the lifting radian adjusting mechanism; the gaps between the first demolding plates and the second demolding plates and the gap between the two first demolding plates are filled through the first splicing plates and the second splicing plates correspondingly; the height and radian of the supporting device can be flexibly and accurately adjusted, and the reinforcing requirements of arch bridge bottom dies of various complex shapes and sizes can be met.

The invention discloses a high-efficiency cable intelligent control method and system for a steel box truss arch bridge, and the method comprises the steps: 101, sampling the tensioning force of all cables according to a preset sampling period, generating the tension time sequence data of all cables, dividing the tension time sequence data of each cable into a plurality of main windows, each main window is divided into a plurality of sub-windows; 102, sub-windows in each main window are divided into static state sub-windows and dynamic state sub-windows, and the main windows with the number of the dynamic state sub-windows exceeding a dynamic number threshold value serve as dynamic section main windows; and step 103, judging whether each dynamic state sub-window in the dynamic section main window has cable drift or not, and if the cable drift occurs, adjusting the cable.

The invention discloses a reinforcing device and method in a box-type arch bridge body. The device comprises a plurality of reinforcing ribs, tie bars, supporting anchors and jacking devices. The two ends of a cavity of the box-type arch bridge body are each provided with a plurality of supporting anchors, and every two corresponding supporting anchors at the two ends of the cavity are connected through a reinforcing rib to form a plurality of arc-shaped reinforcing ribs. The reinforcing ribs are fixedly connected through tie bars, and the reinforcing ribs and the side wall of the cavity are fixedly connected through tie bars, so that a plurality of tie bar reinforcing sections which are longitudinally arranged along the cavity are formed; a jacking device is arranged in each supporting anchorage and connected with the end of the corresponding reinforcing rib. After the device is installed, the multiple reinforcing ribs are synchronously jacked through the jacking device, and the box-type arch bridge is jointly supported to be lifted to the preset deflection. The device can effectively solve the problems of deflection reduction, beam bottom crack development, structural rigidity reduction and the like of an existing box-type arch bridge, prefabricated construction is achieved, the environment corrosion resistance is high, and the service life of the bridge can be prolonged.

The invention provides a tower-free full-arch-width self-adaptive transverse moving cable crane system and method.The system comprises an anchoring foundation and a main cable transverse moving system, the main cable transverse moving system is connected with the anchoring foundation, and the anchoring foundation is arranged on a concrete anchor; the main cable transverse moving system comprises a steel anchor beam, a fixed base, a sliding cable rotating saddle and a dragging system, the two ends of the steel anchor beam are fixedly connected with the fixed base, the steel anchor beam is sleeved with the sliding cable rotating saddle, the sliding cable rotating saddle and the steel anchor beam are in sliding connection, and after sliding to a target position, the sliding cable rotating saddle and the steel anchor beam are connected through a limiting device; the lower end of the fixed base is connected with the anchoring foundation, and the dragging system is arranged below the two ends of the steel anchor beam and connected with the sliding cable rotating saddle. The anchoring foundation is adopted to completely replace a traditional tower structure, the occupied area of the foundation is greatly reduced, and steep terrain limitation is broken through; through the synergistic effect of the sliding cable rotating saddle and the rotating clamping plate, self-adaptive transverse position adjustment and structural stability control of a single system within the full-width range of the arch bridge are achieved.

The invention discloses a floating type rotary installation tool and method for a steel arch rib shore side assembly single ship. The mounting tool comprises a first rotating disc, a second rotating disc and a first connecting rod, the splicing bracket is used for splicing the arch rib sections on the river bank in a framing manner to obtain main sections of the steel arch rib; the temporary steel box is arranged on a river bank and used for supporting one end, far away from the first skewback, of the main section of the steel arch rib; the moving mechanism is located at the bottom of the temporary steel box and used for driving the end, where the temporary steel box is located, of the main section of the steel arch rib to move into the river from the river bank; the power mechanism is used for driving the end, where the temporary steel box is located, of the main section of the steel arch rib to rotate around the first rotating disc to the position where the second arch seat is located after the main section of the steel arch rib moves into the river from the river bank. According to the installation tool, the construction safety and the construction efficiency can be improved, and the influences of construction in a river and navigation in the river are reduced.

The invention provides an adjustable universal profile steel arch frame adjusting device and an adjusting method thereof, a steel arch frame is connected through a plurality of standard sections to form a steel arch bridge structure, the tops of the adjacent standard sections are connected through an adjusting screw rod, the bottoms of the adjacent standard sections are hinged, the standard sections are provided with speed reducing motors, and the speed reducing motors are connected with the adjusting screw rod. The gear motor drives the nut sleeve of the adjusting screw rod to rotate, and the camber of the whole steel arch can be adjusted by changing the distance between the tops of the adjacent standard sections driven by the nut sleeve. And the adjustment is not limited by the problems of complexity and accuracy of manual adjustment, so that the engineering efficiency and the engineering quality are remarkably improved, the installation cost is reduced, and the safety and durability of a bridge structure are enhanced.

The application relates to a device and method suitable for precise positioning of steel pull rods of arch feet of steel truss arch bridges, the device comprising a first positioning steel plate and a second positioning steel plate, the length of the steel pull rod in the concrete arch support foundation being L, L being divided into n sections, the first positioning steel plate being arranged at a starting point node, the second positioning steel plate being arranged at intermediate nodes, and a lower bearing plate being arranged at an end point node, a plurality of through holes being arranged on the first positioning steel plate and the second positioning steel plate, the through holes being used for the steel pull rod to pass through, the positions of the first positioning steel plate and the second positioning steel plate being fixed through four coordinates, steel frame structures being arranged between the first positioning steel plate and the second positioning steel plate, adjacent second positioning steel plates, the second positioning steel plates and the lower bearing plate, and the steel frame structures being welded with the first positioning steel plate and the second positioning steel plate. The application can position the steel pull rod, avoid the steel pull rod from being deflected under the dead weight or being deformed under the impact of concrete pouring, and ensure that the long steel pull rod is perpendicular to the upper and lower bearing plates during construction.

The invention provides a steel tube arch bridge arching construction method suitable for special terrains. Comprising the following steps that a bridge arch rib is divided into a west-side arch rib and an east-side arch rib, the west-side arch rib and the east-side arch rib are each divided into a plurality of arch rib sections, the west-side arch rib is rotated in place in a vertical assembly and vertical rotation mode, and the east-side arch rib is hoisted in place in a support method. According to different geographic positions of the west side arch rib and the east side arch rib, different arch rib installation methods are adopted in a targeted mode, the arch rib vertical rotation construction method without erecting a support is adopted for the situation that the west side arch rib is located in a valley zone and the support is difficult to erect, and the arch rib vertical rotation construction method without erecting the support is adopted for the situation that the east side arch rib is located in a narrow hilly land zone. Therefore, a safer bracket method is adopted for erecting, so that the construction risk is integrally reduced, and the construction efficiency is improved.

The invention discloses an erecting method for a bridge suspension frame construction platform. The erecting method comprises the following steps that construction preparation is conducted; bridge core-pulling drilling: drilling the measured and marked point positions of the bridge surface of the arch bridge; an upper support is installed, a layer of frame pipe is installed on the bridge floor of the arch bridge in the longitudinal drilling direction, a vertical suspension pipe is installed on the bridge floor of the arch bridge in the longitudinal drilling direction, and the vertical suspension pipe and the layer of frame pipe are connected and locked through a fastener. The invention provides a method for erecting a bridge suspension frame construction platform to solve the problems that a traditional construction support is inconvenient to erect due to underbridge navigation requirements during underbridge maintenance and reinforcement construction operation of a two-way curved arch bridge, and meanwhile certain limitation exists during construction operation by using a bridge inspection vehicle. The suspension frame construction platform meeting the construction requirements is obtained by assembling and splicing the fasteners and pin-connecting the pipe fittings in manners of mounting the frame pipe and the suspension pipe, so that the construction cost is reduced, and the efficiency of construction operation is improved at the same time.

The invention provides a half-through concrete filled steel tube arch bridge lattice beam construction method, which optimizes the division of construction segments of a lattice beam, prevents the lattice beam from being installed in place by avoiding arch ribs and cross brace structures among the arch ribs, and enables each construction segment of the lattice beam, especially an arch rib intersection segment, to move to an installation position through horizontal and vertical displacement. Therefore, the arch rib intersection section does not need to be inclined at a large angle to penetrate through the arch rib, and the construction risk caused by unbalanced stress of a lifting point or no stress of the lifting point in the large-angle inclined lifting process of the arch rib intersection section is avoided. And meanwhile, the hoisting capacity is designed by combining with a cable crane, the total number of construction segments of the lattice beam is reduced by dividing the optimized lattice beam segments, the hoisting frequency is reduced, the weight of the construction segments of the lattice beam is close to that of the arch rib segments, and then the construction efficiency is improved, and the construction cost is reduced.

The invention provides a construction method of a prefabricated concrete member temporary support-to-permanent bearing system, which comprises the following steps of: prefabricating a concrete member in a factory according to the curvature of an arc-shaped arch plate, and reserving a rectangular bearing groove at the top; the prefabricated part is hoisted to the designed position, and lateral clamping constraint is formed through a lower fixing device; steel pipe secondary ridges are installed in the bearing grooves, a matched comb plate formwork is laid on the steel pipe secondary ridges, and the bottom face of the comb plate formwork is attached to the top face of the prefabricated part; pouring concrete around the upper and lower chord plates and the prefabricated parts layer by layer to enable the prefabricated cast-in-place structure to form a whole; the auxiliary support is gradually dismantled along with concrete strength increase, and load transfer to the prefabricated part is completed; and the steel pipe secondary edges and the comb plate formworks are dismantled, the bearing grooves are filled, and a continuous stress section is formed. The problems of eccentric load bearing and structural integrity are solved, the method is suitable for the scene that upper and lower chord plates of the arc-shaped arch slab and prefabricated parts are integrally poured, and the construction efficiency and the structural safety are improved.

The invention discloses an arch bridge tensioning method and system based on a physical constraint space-time diagram attention network, and the method comprises the steps: constructing a dynamic topological graph of an arch bridge cantilever construction structure, taking a structure initial state parameter, a control force system parameter and a real-time environment parameter as node input features, and taking a structure state response parameter as an output label, generating a training data set based on finite element model simulation; designing a deep learning network model combined with space diagram attention and time sequence causal convolution, and modeling a space-time dependency relationship; defining a mixed loss function of the data fidelity item and the physical residual loss item of the structural mechanical control equation; and training the model through a back propagation algorithm and deploying the model to a field decision control system. According to the method, through graph structure abstraction, spatio-temporal joint modeling and physical constraint embedding, multi-source monitoring data driven structure state online prediction and tension control strategy intelligent optimization are achieved.

The invention discloses a reinforcing system and method for structural damage of an arch bridge, and belongs to the technical field of bridge engineering. A prestressed carbon fiber grid reinforcing layer (material reinforcement), SMA anchorage device intelligent regulation and control (parameter self-adaption) and magneto-rheological damper active control (dynamic response optimization) realize deep coupling through a distributed sensing network and edge calculation to form system-level collaboration of strength improvement, rigidity adjustment and dynamic performance optimization; the subsystems are driven to work cooperatively through sensing data, and a new'prevention-reinforcement-regulation 'integrated bridge maintenance mode is constructed.

The invention discloses a cable assembly corrugated steel arch bridge and a construction method thereof.The arch bridge comprises foundations on the two sides and a corrugated steel arch shell structure arranged between the foundations in a spanning mode, a corrugated steel arch shell is composed of at least two corrugated steel arch rings arranged in the bridge width direction, and each corrugated steel arch ring is composed of a plurality of corrugated steel arch plates which are sequentially spliced in the arch direction; each corrugated steel arch plate comprises connecting side plates on the periphery and a steel corrugated plate located in the connecting side plates, a plurality of transverse connecting components are arranged on the steel corrugated plate in the width direction, and the transverse connecting components are fixed to the steel corrugated plate and extend out of the connecting side plates in the bridge width direction, so that the transverse connecting components of the adjacent corrugated steel arch rings are connected in the bridge width direction; and an integral corrugated steel arch shell structure is formed. According to the construction method, the supporting towers are arranged on the two sides of the valley, the valley-spanning main cable is tensioned, the end arch sections and the middle-span arch plates are hoisted in a blocking mode in cooperation with the cable-stayed maintaining system, symmetrical assembling is conducted, and the construction method is suitable for rapid construction of the deep valley corrugated steel arch bridge with the complex terrain.

The utility model discloses an assembly type arch foot installation structure of a concrete filled steel tube arch bridge, which comprises a steel arch seat and an arch foot section installed on the steel arch seat, the steel arch seat is installed on a foundation, and a steel main beam is installed on the foundation; wherein the steel skewback is provided with a mounting surface perpendicular to the length direction of the arch foot section, a positioning structure is arranged on the mounting surface, the arch foot section is obliquely arranged, and the lower end of the arch foot section is fixedly connected with the positioning structure and the steel skewback respectively; a stay cable mounting seat is further arranged on the steel arch seat and connected with the arch foot section through a stay cable, so that the arch foot section is subjected to tension in the direction close to the steel arch seat, a support is arranged on the side, close to the arch foot section, of the steel arch seat and connected with the steel arch seat, the lower end of the support abuts against the steel main beam, and the upper end of the support abuts against the lower side of the arch foot section. And the arch foot section is subjected to upward supporting force. The utility model has the advantages of simple structure and assembly construction, improves the construction efficiency, reduces the construction difficulty and shortens the construction period.

The invention provides a construction method for different-position assembling, overall transporting and overall lifting of arch ribs, and belongs to the technical field of bridge construction, and the method comprises the following steps: erecting an assembling bracket, mounting a sliding rail, assembling the arch ribs to be closed, tensioning a temporary tie bar, integrally sliding the arch ribs to a ship, integrally floating the arch ribs in place, integrally lifting the arch ribs, and welding arch feet. And converting the system. The main arch is assembled on the land in different positions, and the open space near the bridge site is used as an assembly site, so that the influence on current navigable ships is greatly reduced, and the accuracy and the safety of arch rib assembly are improved.

The invention discloses an inclined shaft built-in type skewback structure and a construction method thereof, the inclined shaft built-in type skewback structure comprises two inclined shaft foundations and a straining beam arranged between the two inclined shaft foundations, and the two ends of the straining beam are fixedly connected with the inclined shaft foundations respectively; the section shape of the inclined shaft foundation is a gate-type section with an arc-shaped top; pier bases are symmetrically arranged on the two inclined shaft foundations; the inclined shaft foundation and the pier base are both partially embedded and fixed in a rock mass; the inclined shaft foundation is obliquely arranged, and the center line is parallel to the arch axis of the arch bridge. The problems that in an existing skewback foundation form, the earthwork excavation volume is large, and skewback foundation stress is not definite are solved; the construction efficiency of the skewback structure is effectively improved, and rapid construction of the arch bridge skewback structure at the canyon in the mountainous area is achieved.