751results about "Arch-type bridge" patented technology

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 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 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 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 small arch bridge construction equipment and a construction method.The construction equipment comprises a supporting platform and a plurality of sequentially-distributed frame bodies, the side ends of the adjacent frame bodies are rotationally connected, and therefore the multiple frame bodies form an upward-protruding structure; the two frame bodies at the edges are movably connected and are driven to be close to or far away from each other to adapt to the arch bridge height; the high frame body is driven to be close to or away from the supporting platform to adapt to the height of the arch bridge; the other frame bodies are driven by the frame driving piece to rotate, so that the included angle between the adjacent frame bodies is increased or decreased to adapt to different arch bridge shapes; the supporting device is compact in structure and small in occupied space, construction adjustment can be carried out while the prefabricated arch sections are sequentially connected conveniently, the supporting device is suitable for construction of small arch bridges of different shapes, bearing of the prefabricated arch sections is more uniform, the problems of excessive concentration of loads, uneven load distribution or transmission deviation are avoided, and the supporting stability and safety are improved.

The invention discloses a deck-type arch bridge deck linear control method and system, and the method comprises the following steps: S100, carrying out the precise measurement of the center coordinates of a column foot of a vertical column through a measuring instrument after the closure of arch ribs, and calculating the blanking length of the vertical column according to the measured data and a displacement influence matrix; and S200, according to the determined stand column blanking length, stand column prefabrication work is carried out, and after stand column construction is completed, bent cap hoisting work is carried out. After hoisting is completed, the coordinates of the top face of the bent cap are measured, and the correction value of the height of the support padstone is calculated; and S300, after construction of the support cushion stone is completed, main beam hoisting is conducted, after hoisting of the main beam is completed, coordinates of the top face of the main beam are measured, and the bridge deck line shape is finely adjusted through a bridge deck pavement layer so that the bridge deck line shape can reach the designed line shape. According to the method, a staged three-time correction strategy is adopted, the influence matrix and the pre-camber distribution model are combined, the arch building structure parameters are adjusted at a time, the bridge deck linear precision is remarkably improved, the construction efficiency is improved, and the period and cost are saved.

The invention relates to the technical field of bridge erection, in particular to a closure construction device and method for arch ribs in an arch bridge, and the device comprises a laser ranging mechanism and a target mechanism. The laser ranging mechanism is used for being arranged at the end of a rib limb of an edge rib section erected at a theoretical position, the laser ranging mechanism comprises a laser range finder and a clinometer, and the clinometer is used for adjusting the angle of laser emitted by the laser range finder in a matched mode. The laser is parallel to a theoretical chord line formed by the theoretical position of the end part of the middle arch rib section and the theoretical position of the end part of the side rib section; the target mechanism is used for being arranged at the end of a rib limb of the middle arch rib section and corresponds to the laser distance measuring mechanism in position so as to receive laser emitted by the laser distance measuring instrument, and the position of the middle arch rib section can be adjusted to be within the construction allowable error range in a matched mode. The problems that in the prior art, constructors need to work aloft, firstly measure data and then operate construction equipment to adjust the matching relation of the closure gap, so that the construction efficiency is low, and meanwhile the safety risk of high-altitude construction work is large are solved.

The invention discloses a construction method of a steel beam operation platform and a steel arch operation platform crossing a river channel, and belongs to the technical field of bridge construction. The construction method comprises the following steps that S1, temporary supports are installed in water; s2, a longitudinal bridge direction constructor channel used for walking of constructors is installed on a longitudinal connecting beam of the temporary support; s3, a tie beam butt joint operation platform is installed at the tie beam butt joint position; middle cross beam butt joint platforms used for welding and coating the bridge deck units and the upper flanges of the middle cross beams are installed on the two sides of the middle cross beams; s4, before the steel arch sections are hoisted, a climbing ladder is installed on an upper panel of the steel arch; and S5, a steel arch operation platform facilitating operation of constructors is installed on the steel arch. The operation platform is reasonable in structural design, constructors can walk conveniently, and the constructors can go up and down conveniently for operation; meanwhile, the rest platform is arranged, so that the constructors are prevented from climbing up and down to be tired, and safety and reliability are achieved.

The utility model relates to the field of arch bridge construction, in particular to an ultra-wide steel box tied arch bridge arch temporary combination supporting structure which comprises an arch rib, a beam body and a plurality of transversely-arranged supporting units. The supporting unit is located between the arch rib and the beam body and comprises a plurality of supporting assemblies, each supporting assembly comprises two supporting rods, the tops of the two supporting rods are fixedly connected with clamping supporting parts, the arch rib is located at the tops of the supporting rods, and the two clamping supporting parts are located on the left side and the right side of the arch rib respectively. The left side face and the right side face of the arch rib are fixedly connected with the two clamping supporting parts respectively. According to the scheme, the arch rib is supported by the two rows of supporting rods, the supporting stability of the temporary combined supporting structure is improved, and it is guaranteed that the arch rib has enough rigidity and stability.

The invention discloses an opposite-penetrating steel strand auxiliary tensioning device for a concrete-filled steel tube tied arch bridge, and belongs to the technical field of bridge assembly equipment.The opposite-penetrating steel strand auxiliary tensioning device structurally comprises a suspension seat, two vertical traction platforms and two movable bases, and the two vertical traction platforms are located on the two sides of the suspension seat respectively; the two vertical traction platforms correspond to the two movable bases in position, the two movable bases are installed on the bridge floor on the side portion of the main beam in a sliding mode, the upper ends and the lower ends of the vertical traction platforms are connected with the hanging bases and the movable bases through a set of steel wire ropes respectively, and the other ends of the two sets of steel wire ropes are arranged on the upper winding drum and the lower winding drum respectively; according to the tensioning device, auxiliary tensioning operation is conducted on the opposite-penetrating steel strands on the concrete-filled steel tube tied arch bridge, the arc-shaped steel strands on the two sides of the opposite-penetrating channel located on the concrete-filled steel tube arch rib can be pulled and transferred, and the tensioning speed and precision of the opposite-penetrating steel strands are improved; and construction delay caused by complex states of the steel strands is reduced, so that the overall construction efficiency is improved.

The invention relates to a large-span arch ring cast-in-place support constant-weight loading construction method which comprises the steps of support erecting, formwork installing, support pre-pressing, pre-pressing unloading, parallel construction of an arch ring body, interval groove pouring and support dismantling according to the construction sequence. According to the step of pre-pressing unloading and arch ring body parallel construction, one section of arch ring body is constructed when one section of arch ring body is unloaded in the direction from the arch springing to the arch crown, unloading and arch ring construction are carried out synchronously, and after support pre-pressing is completed, the arch ring body is unloaded in the arch springing and arch crown parallel construction step is completed, and the arch ring body is unloaded in the arch springing and arch crown parallel construction step. Gradually advancing from the arch feet to the arch crown according to the principle that one section of arch ring is constructed after one section of arch ring is unloaded, and compared with a conventional scheme that the arch ring is constructed after unloading is completed, the construction period can be greatly shortened.

The invention relates to the technical field of bridge engineering, in particular to a bridge creep deformation prediction and control method, which comprises the following steps: establishing a bridge structure finite element model; determining key section positions of the upper and lower edges of the bridge structure, and installing stress test elements at the key section positions; monitoring and recording the stress change of the upper and lower edges of the key section position in real time in the construction process; parameters in the finite element model are adjusted according to actually measured stress data, so that the error between the stress difference between the upper edge and the lower edge of the finite element model and an actually measured value is controlled within 1.0 MPa; generating a prediction result by using the corrected finite element model, wherein the prediction result comprises the creep deformation amount and the creep deformation direction of the bridge structure in the later period; and reserving a fastener adjustment space according to a prediction result. The scheme is used for solving the defect that in the prior art, the later creep deformation of a large-span beam arch bridge is difficult to accurately predict, and high-precision prediction of the later creep deformation of a bridge structure and dynamic parameter optimization and adjustment in the construction stage are achieved.

The embodiment of the invention provides a hinge-free arch bridge parameter optimization method, device and equipment. The method comprises the following steps: calculating mechanical response parameters of a target hinge-free arch structure by adopting an angular displacement method; constructing an objective function based on the mechanical response parameters and the obtained optimization indexes, wherein the objective function comprises a plurality of to-be-optimized design parameters of the unhinged arch structure; initial design parameters of the unhinged arch structure are determined; and performing iterative calculation on the initial design parameters and the target function based on an optimization algorithm to obtain optimized design parameters. According to the parameter optimization method for the hinged arch bridge provided by the embodiment of the invention, the design parameters of the hinged arch structure can be automatically optimized on the basis of a simple and rapid method, so that the optimal design parameters are obtained.

The invention discloses a large-section special-shaped steel arch rib rapid installation guiding and positioning system and a using method, the system comprises a support and a control cabinet, a guiding and positioning mechanism comprises two guiding frames and two installing bases, rotating shafts are fixed to the front surface and the rear surface of each guiding frame, two sets of cylindrical holes are formed in each installing base in advance, and the two sets of cylindrical holes are connected with the control cabinet. And clamping rods with holes are arranged in one set of cylindrical holes in each mounting base, L-shaped clamping plates are arranged in through holes in the two ends of each clamping rod with the holes, and the outer surface of each rotating rod is movably connected with an auxiliary wheel and a set of limiting pipes in a sleeving mode. The problem that the steel arch rib is damaged due to friction during rapid installation can be solved, the installation speed of the steel arch rib is not affected, and therefore the situation that the engineering quality is affected due to installation error accumulation is avoided.

The utility model belongs to the field of arch bridges, and discloses a tied-arch bridge which comprises a main span beam, side span beams and arch ribs. The main span beams extend in the bridge direction and bear vehicle loads and the weight of a bridge deck system. The side span beams are connected to the two ends of the main span beam in the bridge direction and can guide transmission of bridge deck loads, release the bending moment of the main span beam and reduce the rotating angle of the main span beam. The arch rib comprises a main arch rib and an auxiliary arch rib, the main arch rib is bent upwards, arch feet at the two ends of the main arch rib are connected to the two bridge-direction ends of the main span beam respectively, the arch foot at one end of the auxiliary arch rib is connected to the bridge-direction end of the side span beam, the arch foot at the other end of the auxiliary arch rib is connected to the main arch rib, and the main arch rib, the auxiliary arch rib and the side span beam define a triangular structure. By means of the geometric stability principle of a triangle, the corner displacement of the bridge end of the tied-arch bridge is effectively restrained, and the smoothness and comfort of driving on the bridge are improved. The structure can also reduce the destructive effect of the bending moment on the side span beam on the main span beam, and the overall durability and safety of the bridge are further enhanced.