592results about "Cable-stayed bridge" patented technology

The invention belongs to the technical field of bridge installation and monitoring, and particularly discloses a cable-stayed bridge girder rapid installation monitoring analysis method based on an AI technology. The method comprises the following steps: S1, acquiring displacement, stress and environmental load data of a current installation segment and an adjacent installed segment in real time through a distributed sensor network, and constructing a global installation data set; s2, performing space-time alignment processing on the data set, extracting a joint feature vector representing a single-point instantaneous state and an inter-segment accumulated deviation, and dynamically calculating an attitude prediction tolerance and an accumulated error trend tolerance under a current working condition based on an environmental load; s3, inputting the joint feature vector into a pre-trained time sequence prediction model, and outputting an attitude prediction result and an accumulative error trend evaluation result of a future key time point; and S4, error grading decision making is carried out. According to the method, bridge installation is converted from passive monitoring to active prediction control, and the installation precision, efficiency and safety are effectively improved.

The invention provides a self-balancing device for preventing a cable from sliding off in the tensioning process of a super-long longitudinal cable and a construction method, the rear part of an extension rod is anchored through a temporary anchoring mechanism, and the rear end of the extension rod penetrates through the temporary anchoring mechanism and is pulled by a center hole type tensioning jack; the extension rod is further sleeved with an auxiliary traction mechanism in a fastening mode, and the front end of the auxiliary traction mechanism is connected to the cable body protection sleeve. The rear end of the auxiliary traction mechanism is connected to the temporary anchoring mechanism; the stay cable is further sleeved with an annular anti-clamping-falling buffer, the stay cable can move in the annular anti-clamping-falling buffer in the axial direction, and the outer side of the annular anti-clamping-falling buffer is detachably installed at the position, close to the cable inlet end, in the cable guide pipe. The invention aims to ensure the safety of the tensioning end of the stay cable in the initial tensioning process close to the bridge tower, prolong the service life of the extension rod, solve the risk that the rigid extension rod is easy to break or unstable in connection with the anchor cup to cause the falling of the stay cable, and ensure the safety and stability of the stay cable in the tensioning process.

The invention relates to the technical field of consolidation structures, in particular to a tower beam pier consolidation structure of a swivel cable-stayed bridge, a tower beam pier consolidation area comprises a partition plate, a stiffening plate, a shear nail, a prestress pull rod set and consolidation concrete, the tower beam pier consolidation area is consolidated with a cable bent tower, a pier and a main beam at the same time, the cable bent tower penetrates through the main beam from top to bottom, and the pier penetrates through the main beam. Concrete in the tower beam pier consolidation area, tower column concrete of the cable bent tower and bridge pier concrete are poured into a whole together, it is guaranteed that steel and concrete in the tower beam pier consolidation area are stressed and deformed together, and the problems that a traditional tower beam pier consolidation structure is weak in bonding performance and insufficient in torsional shear resistance are solved.

The invention discloses a real-time control method and system for the construction stage of a cable-stayed bridge, and relates to the technical field of bridge engineering construction control, and the method comprises the steps: obtaining bridge design parameters, constructing an initial structure model, and obtaining the basic structure response of the construction stage; performing staged construction simulation and analysis cable force calibration according to the foundation structure response to obtain a calibration result; generating a self-adaptive grid according to a calibration result; finite element analysis and HiDeNN enrichment modeling are carried out based on an adaptive grid, and an enrichment continuous field is generated; performing Physics-Loss driving optimization according to the enrichment continuous field to obtain a pre-training agent model; based on the pre-training agent model, construction stage self-adaptive solution and multi-stage iterative updating are carried out, and structural mechanical response data of the construction stage are obtained and used for stress control and construction guidance in the construction process. Accurate and real-time control over the cable-stayed bridge construction process can be achieved, and the precision and efficiency of cable-stayed bridge construction control are improved.

The invention relates to the technical field of cable-stayed bridge construction, in particular to a cable-stayed bridge cable force determination method based on process control, which comprises a cable-stayed bridge cable tower, a stay cable and a main beam section, a finite element model is established according to the sizes of the cable tower and the main beam section, and after the zero section in the main beam section is simulated and installed, the zero section is determined. Installing first segments on the left side and the right side of the zero segment respectively, tensioning prestressed steel beams in the first segments, operating a finite element model, recording bending moment values of beam ends of the first segments, setting virtual support constraint node vertical and torsional displacement at the beam ends of the first segments, operating a calculation model, and calculating the bending moment values of the first segments; and the vertical counter force and the virtual bending moment value borne by the virtual support are recorded, the virtual support is deleted, a stay cable unit is established between the preset anchor point of the first section and the cable tower anchor point, and different stay cable body internal force is set twice.

The invention relates to an artificial intelligence-based prestress tensioning process anomaly identification method, which specifically comprises the following steps of: annularly and symmetrically arranging four steel beams on a bridge main tower for synchronous tensioning, installing a sensor network on tensioning equipment of each steel beam, synchronously acquiring data to construct a sample for training, and labeling the sample; constructing an anomaly recognition model, inputting sample data into the model, obtaining an anomaly recognition result through composite embedding and space-time position coding of tensioning time sequence data, a multi-stage dynamic feature modulation and anomaly sensitive feature mining module and a multi-stage space-time anomaly detector, calculating a total loss function of the model, and training the anomaly recognition model; and deploying a sensor network in a to-be-recognized target tensioning process to collect related data, inputting the related data into the trained anomaly recognition model, and outputting an anomaly classification result. According to the invention, multiple types of pre-stress tension anomalies can be accurately identified, and the detection efficiency and accuracy are improved.

The invention discloses a cooperative double-control method for stay cable force and main beam line shape, which comprises the following steps of: mounting a cable force sensor on a stay cable to measure the cable force in real time, mounting an elevation dynamic accurate measuring instrument on a main beam to measure the elevation in real time, and establishing communication connection among the cable force sensor, the elevation dynamic accurate measuring instrument and an intelligent tension system control center; and the control center comprehensively analyzes and processes according to the tensioning force of the system, the actually measured cable force and the elevation condition and controls the action of the tensioning equipment, so that the tensioning and supplementary tensioning work of the stay cable is completed, the cooperative control of the cable force and the line shape is realized, and the construction precision and the construction efficiency are improved.

The utility model relates to a movable construction platform of a cable-stayed bridge tower column, and belongs to the technical field of bridge maintenance. The two C-shaped platform modules are connected in a closed mode to form an all-dimensional construction platform structure special for surrounding the side face of the bridge tower column of the cable-stayed bridge, and the all-dimensional construction platform structure can be lifted to any height position to conduct construction on the bridge tower column under the cooperation of a suspension system, a lifting machine and a steel wire rope. Meanwhile, aiming at the side face of the bridge tower column with the variable section size, a linear telescopic platform on the inner side is arranged on the basis of the C-shaped platform module for further distance reduction, small-range space adjustment can be conducted when the C-shaped platform module is close to the side face of the bridge tower column, and an auxiliary basket set hung on one side is arranged. And the construction personnel can further conveniently, quickly and directly adjust the operation space at a small distance in the operation process.

The invention discloses a suspended pouring construction method for a hanging basket of a cable-stayed bridge, belongs to the technical field of bridge construction, and aims to solve the problems of beam section linear deviation caused by deformation of a hanging basket system and bridge tower deviation caused by asynchronous tensioning of stay cables. Performing a staged loading preloading test to obtain elastic deformation data, calculating an anti-arch value based on the data, and dynamically adjusting the elevation of a bottom die platform; a layered pouring process is combined with a real-time deformation monitoring and compensation mechanism, and the accumulated deformation amount is controlled; the longitudinal prestressed steel beams are tensioned in stages, the symmetric tensioning process of the stay cables is synchronously implemented, and bridge tower deviation closed-loop correction is achieved through combination of a displacement sensor and a pressure sensor; in the moving process of the hanging basket, the gravity center offset is monitored, the balance weight is adjusted, and after full-bridge closure, the cable force of the stay cable is optimized in a staged mode to the design state. The method is suitable for large-span cable-stayed bridge girder construction, and high-precision linear control and stable structure forming are achieved.

The invention relates to the technical field of bridges, in particular to a bridge and sound barrier integrated structure for driving in a beam. A bridge and sound barrier integrated structure for driving in a beam comprises a box beam, the box beam is of a concrete structure, the interior of a box beam cavity of the box beam is used for driving of a train, a box beam bottom plate is provided with a bottom plate cross beam, the bottom plate cross beam protrudes out of a box beam web plate, and the bottom plate cross beam is used for anchoring a stay cable or a sling; the track is arranged on a bottom plate of the box girder, and the track extends in the length direction of the box girder. Compared with the prior art that the train runs on the bridge floor and a sound barrier needs to be arranged on the bridge floor, the train of the structure can directly run in the box girder cavity, the step of arranging the sound barrier on the bridge floor is omitted, and the construction efficiency is improved. And as no sound barrier is arranged, the situation that the sound barrier is damaged is avoided as far as possible, and therefore potential safety hazards caused by damage of sound barrier components in the long-term operation process are avoided.

The invention relates to the technical field of bridge construction, in particular to a bridge super-long stay cable penetrating construction method, which comprises the following steps of: presetting a monitoring point position at a super-long stay cable, installing a tilt angle sensor to obtain pitch and roll angles of a segment, and fixing a tension sensor to measure initial tension at a cable end. A pitch angle, a roll angle, a three-dimensional coordinate and initial tension data are collected in real time at a preset point position of the stay cable, a dynamic response cable body attitude and stress model is constructed in combination with a designed linear control point and an anchoring point space coordinate, traction force distribution and traction point position combination are optimized, synchronous or asynchronous cooperative loading of multiple traction forces is achieved, and the traction force distribution and the traction point position combination are optimized. And in the cable penetrating process, cable body posture control and mechanical response balance are kept. Sensing data and a target parameter interval are continuously compared, a stress closed-loop control mechanism is formed by adjusting a traction force value and a loading rate in real time, and the risks of stress concentration and linear deviation expansion are avoided.

A stay cable fire-stopping device capable of bidirectional expansion when exposed to heat. The fire-stopping device comprises a fire-stopping ring and a positioning clamp (2). The fire-stopping ring is fixedly disposed on the surface of a stay cable body (4) by means of the positioning clamp (2), and wraps around the stay cable body (4). When exposed to heat, the fire-stopping ring expands inwards to tightly hold the stay cable body (4), and expands outwards to isolate portions of the stay cable body (4) on two sides of the fire-stopping ring. A weather-resistant fireproof tape (206) is wound around the stay cable body (4) at the location where the fire-stopping ring is disposed, and the fire-stopping ring is arranged outside the fireproof tape (206). The fire-stopping ring comprises a fire-stopping ring outer shell (9) and a fire-stopping core material (10), and the fire-stopping core material (10) is disposed inside the fire-stopping ring outer shell (9). The device uses a bidirectionally expanding fire-stopping core material as the core component for fire prevention. By virtue of its thermal expansion property, the core material, when exposed to heat, expands inwards to tightly hold the cable body and expands outwards to isolate portions of the cable body on two sides, thereby stopping fire from spreading.

The invention discloses a steel plate composite beam cable-stayed bridge tower beam consolidation connection structure which comprises a pressure-bearing steel plate, a concrete cushion block, a first connecting piece and a second connecting piece, the pressure-bearing steel plate is welded to the end of a steel main beam and is consolidated with the concrete cushion block through the first connecting piece, and the concrete cushion block and a concrete bridge tower are synchronously poured together. The concrete bridge deck slab is connected with the concrete bridge tower into a whole in a post-pouring mode, and the pressure-bearing steel plate and the concrete bridge tower are tightly connected together through the second connecting piece. The method has the advantages that the end pressure-bearing steel plates are adopted, axial force and bending moment are transmitted to the concrete bridge tower through the pressure-bearing steel plates, shearing force and torque are transmitted to the concrete bridge tower through connecting pieces of the pressure-bearing steel plates and friction force between the steel plates and the bridge tower, and the structural force transmission path is clear and simple; the pressure-bearing steel plates are provided with welding studs connected with the concrete cushion blocks, and conflict between the welding studs and concrete bridge tower main reinforcements is avoided; 3, the pressure-bearing steel plates are tightly connected with the concrete bridge tower through the opposite-pulling steel beams, so that insufficient shear capacity caused by small axial force of a main beam during construction is avoided, and meanwhile, the safety reserve of the structure during operation can be improved; the structure is simple, force transmission is reliable, and construction is simple.

The invention discloses a wind-induced vibration control method for a large-span cable-stayed bridge in a mountainous area during a construction period, and the method comprises the steps: obtaining an average wind speed profile of a construction site, and constructing a fluctuating wind speed self-power spectrum model and a coherence function model of the construction site; extracting a generalized transfer function and a correlation reduction factor, and correcting the fluctuating wind speed auto-power spectrum model and the coherence function model; constructing a power spectrum density matrix according to the corrected fluctuating wind speed auto-power spectrum model of the construction site and the coherence function model, after decomposition, determining a phase angle and a weighting coefficient of each frequency component, generating a harmonic component, performing weighted stacking, and generating fluctuating wind speed time-history samples at each point of a main beam and a bridge tower space; obtaining a buffeting force load and a static wind load; self-excitation force loads at all points of the main beam are obtained; finite element models of different construction states of the target bridge are constructed, buffeting force loads, static wind loads and self-excitation force loads are superposed to serve as input load time history parameters, vibration time domain responses of the different construction states of the target bridge are simulated, and vibration control measures are optimized.

The invention discloses a stay cable tensioning system and method. The stay cable tensioning system comprises a data acquisition module, a modeling and simulation module, a multi-source data fusion module, a cable force value prediction module, a disease diagnosis and maintenance module and a tensioning control module. According to the stay cable tensioning system, through full-process digitization of data acquisition, modeling analysis, intelligent control and maintenance rehearsal, the change from experience driving to data driving is achieved. The method has the core advantages that the deep fusion of multi-source data, the precise simulation of the digital twin model and the efficient decision of the intelligent algorithm significantly improve the construction precision of the stay cable, the safety of the structure and the maintenance efficiency. The method has the advantages that the prediction error of the cable force value in the construction stage is reduced from + / -5% to + / -1.2%, the stability of the cable force value after bridge forming is improved by 60%, and the vibration amplitude is reduced by 85%.

The present invention belongs to the technical field of rotating bridge construction, and specifically relates to a device and method for controlling the posture of an unbalanced rotating cable-stayed rotating bridge. The device comprises a circular slideway disposed between an upper rotating body and a lower rotating body; a sliding assembly, eight of which are evenly arranged on the slideway. The sliding assembly comprises: a footboard disposed below a beam; a sliding steel pad disposed in the forward direction of the bottom of the footboard; and a polytetrafluoroethylene plate disposed between the slideway and the sliding steel pad. While being able to fully control the posture of the bridge during rotation, the present invention overcomes the problems existing in conventional operating methods, achieving a smooth rotation of the bridge at minimal cost and in the simplest operating method.

The utility model discloses a cable-stayed gallery bridge arranged between buildings, which is mounted between a first building and a second building and comprises a cable bent tower, a main beam and a stay cable. The cable bent tower is fixedly arranged between the first building body and the second building body, and a first hinge seat is fixedly arranged above the cable bent tower. The main beam is fixed to the first building body, the second building body and the cable bent tower, side surrounding plates are fixedly arranged on the two sides of the main beam, an arc-shaped plate fixed to the side surrounding plates is arranged above the main beam, the main beam, the side surrounding plates and the arc-shaped plate jointly define a pedestrian path, the main beam comprises a beam body and a supporting rod penetrating through the beam body, and second hinge bases are arranged on the two sides of the supporting rod. The stay cable is connected between the first hinge seat and the second hinge seat, and a locker is arranged between the stay cable and the second hinge seat. According to the core structure of the cable-stayed gallery bridge, a single bending structure of a traditional flat bridge is converted into a multi-point tension structure through a cable bent tower-main beam-stay cable triangular stress system, the bending moment of the main beam is remarkably reduced, and the applicable span range is expanded.

The invention belongs to the technical field of sail-shaped cable-stayed bridge construction, and relates to a long and thin structure arched steel tower installation method which comprises the steps that a bridge lower structure and a main tower are constructed, and an auxiliary tower root embedded section, a top connecting piece and related construction components are embedded in the main tower; during main tower construction, an attached tower fixing section and a main beam are synchronously installed, and the attached tower fixing section is fixedly connected with the main tower through welding and a steel truss set; a support is erected on a girder bridge floor, tower-attached sections are assembled according to the inverted arch posture, the pre-bias value and the pre-camber are preset, and rotating hinges are installed; a vertical rotating cable, a back cable and a cable wind cable which are made of steel strands are arranged, and testing is completed; one-time vertical rotation welding of one section of the attached tower is achieved through synchronous traction of a continuous jack, and then secondary vertical rotation is conducted on the whole section of the attached tower; after vertically rotating in place, welding and fixing, and dismounting related equipment and a bracket; the invention aims to solve the problems of high overhead operation risk, difficulty in control of construction precision, large temporary support investment, low work efficiency and insufficient adaptability of a traditional mounting method.

The application discloses a cable-stayed bridge pylon digital monitoring method and related equipment, and relates to the technical field of bridge monitoring. The method comprises the following steps: acquiring initial data, wherein the initial data comprises pylon environment data and three-dimensional shape information; positioning a skeleton position based on magnetic coding data and the three-dimensional shape information; adjusting a template posture based on the skeleton position, so that the template posture matches the skeleton position, and acquiring correction data in the adjustment process; monitoring a pouring process based on an intelligent hydraulic control system to obtain dynamic data; based on a concrete surface image, analyzing feature points of the concrete surface image, calculating a deviation error, and determining deviation data; integrating multi-source data to monitor a pylon structure, and predicting a health state of the pylon structure, wherein the multi-source data comprises the initial data, the correction data, the dynamic data, and the deviation data.

The invention relates to the technical field of stayed-cable bridges, and discloses a stayed-cable anchoring device and an anchoring method.The stayed-cable anchoring device comprises a support, and a rod-shaped body is installed in the support; the monitoring assembly can monitor the straightness deviation of the stay cable; the adjusting assembly comprises a moving part and a driving part; a containing space is formed in the moving part, the left side and the right side of the moving part are slidably arranged on the rod-shaped body in a sleeving mode, and part of the rod-shaped body and the anchorage device are located in the containing space; the moving part can drive the anchorage device to move so that the deviated stay cable can be reset. The controller is electrically connected with the monitoring assembly and the driving part; when the straightness deviation monitored by the monitoring assembly is larger than a preset value, the controller controls the driving part to be started. The deviated stay cable is driven to reset through the adjusting assembly, and the problem that due to the fact that the position of the stay cable is changed, stress concentration occurs in part of the positions of the main beam and the bridge tower, and consequently the bearing capacity of the stay cable and the overall stability of the bridge are affected is solved.

The invention relates to the technical field of building construction, in particular to a cable-stayed bridge tower column channel installation method which comprises the following steps: S1, establishing an intelligent scheduling system, monitoring meteorological changes, traffic conditions, equipment allocation and worker working efficiency in real time, and predicting weather trends in combination with machine learning; when the system is used, the hoisting path is optimized, the hoisting efficiency is improved, construction delay and potential safety hazards are reduced, automatic control and adjustment are conducted through an intelligent system, human intervention is reduced, the accuracy and automation level of operation are improved, the management efficiency of a construction site is improved, and the labor intensity of workers is lowered. Through real-time data processing of the wireless data transmission module and the central control platform, the real-time state of a site can be conveniently and rapidly obtained, a hoisting plan can be conveniently and timely adjusted, the working efficiency and safety can be improved, an alarm is automatically triggered and a project manager is reminded, so that the emergency situation can be rapidly dealt with, and the working efficiency and safety are improved. And the hoisting operation can be efficiently and safely carried out.

The application relates to an artificial intelligence-based prestress tensioning process anomaly identification method, and specifically as follows: four steel strands are symmetrically arranged in the ring direction of a bridge main tower for synchronous tensioning, sensors are installed on the tensioning equipment of each steel strand, sample data for training is synchronously collected and constructed, and the sample is labeled; an anomaly identification model is constructed, sample data is input into the model, and the anomaly identification result is obtained through the composite embedding and space-time position coding of tensioning time sequence data, a multi-stage dynamic feature modulation and anomaly sensitive feature mining module, and a multi-stage space-time anomaly detector, the total loss function of the model is calculated, the anomaly identification model is trained; the sensor network is deployed to collect related data of the target tensioning process to be identified, the related data is input into the trained anomaly identification model, and an anomaly classification result is output. The application can accurately identify prestress tensioning multi-class anomalies and improve the detection efficiency and accuracy.

The invention discloses a cable-stayed bridge beam end expansion joint, and belongs to the technical field of bridge structures, the cable-stayed bridge beam end expansion joint comprises symmetrically arranged expansion joint channel steel, and anchoring steel bars are arranged on the opposite end faces of the expansion joint channel steel; limiting cavities are formed in the opposite end faces of the expansion joint channel steel, suspended cylindrical steel is arranged in the limiting cavities, and a plurality of connecting pieces are hinged between the adjacent cylindrical steel. A plurality of vertically-arranged mounting cavities are formed in the upper end face and the lower end face of the limiting cavity, spherical cavities are formed in the middles of the mounting cavities, connecting balls are movably arranged in the spherical cavities, through holes are coaxially formed in the connecting balls, hydraulic damping structures are arranged in the through holes, and the output ends of the hydraulic damping structures are hinged to the cylindrical steel balls. The invention aims to solve the problems that a bridge body continuously vibrates due to external factors such as vehicles and wind-induced effects, so that the bridge body is easily fatigued, the deformation recovery capability is reduced, and a bridge expansion joint cannot be reset.

This application discloses a cable-stayed basket structure and its construction method, comprising a basket body, an anti-reverse device connected to the rear end of the basket body, and a positive tension device connected to the front end of the basket body. The positive tension device includes a support frame, rollers, a winch, and a traction rope. The support frame and winch are both installed on the cast-in-place box girder. The winch is located behind the support frame, and the rollers are installed on the support frame. One end of the traction rope is connected to the winch, and the other end is connected to the front end of the basket body. The middle of the traction rope passes over the upper part of the rollers. The anti-reverse device includes an anti-reverse block, an anti-reverse rod, and a shear key. The anti-reverse block is embedded in the lower part of the box girder. The anti-reverse rod is detachably connected to the anti-reverse block. The shear key is located in front of the anti-reverse block and the anti-reverse rod and is fixed to the rear end of the basket body. A pulley is installed on the shear key, which can press against the anti-reverse block and the anti-reverse rod. This application has the effect of facilitating the installation of the reaction wheel.

The utility model provides a bridge floor stay cable guiding device, which relates to the technical field of stay cable guiding and comprises a guiding assembly, a limiting assembly is arranged at the top of the guiding assembly, a moving assembly is arranged at the bottom of the guiding assembly, side supporting assemblies are arranged on two sides of the guiding assembly, and the guiding assembly comprises a supporting base. And fixing frames are symmetrically mounted at the top of the supporting base. The rotating motor electrically drives the rotating seat to rotate, the rotating seat drives the top plate to turn over, then the top plate is turned over to the position above the guide wheel, when the bridge deck stay cable is installed and constructed, the downward pressing wheel is beneficial to exerting downward pressure on the stay cable, and meanwhile the downward pressing wheel is matched with the stay cable to move on the guide wheel; and the stability of the stay cable in the construction process is guaranteed, so that shaking of the stay cable is effectively reduced, the stay cable is kept in a relatively stable state, and the influence of severe weather such as strong wind on the stay cable is reduced.

The invention relates to the technical field of bridge construction, in particular to a cable-stayed bridge cable hoisting system, a mounting method and a construction method. Comprising a rotating rope bracket, a tower top hoisting structure, a bearing structure, a hoisting structure and a traction structure, the tower top hoisting structure is fixed to the top of the tower column and used for vertically hoisting objects. The bearing structure comprises a plurality of bearing cables arranged along the bridge direction; the two ends of the bearing cable are fixed to the anchors of the shore bases on the two sides correspondingly. The hoisting structure comprises a sports car connected to the bearing cable in a sliding mode and a hoisting pulley block driven by the sports car to vertically ascend and descend. The traction structure comprises a winch arranged on the shore side; the winch is connected with the sports car through the traction cable and used for driving the sports car to move along the bearing cable. The cable hoisting system is simple in structure, convenient to operate and use, suitable for bridge construction of complex mountainous terrains with large topographic relief, capable of effectively solving the problem of hoisting blind areas caused by tower-shore separation, easy to operate, safe and reliable.

The invention discloses a cable bent tower lower tower column structure and a construction method thereof, and belongs to the technical field of bridge engineering, the cable bent tower lower tower column structure comprises a bearing platform, a tower limb assembly, a wall assembly, a lower cross beam, a steel plate and a prestressed steel cable, a lower tower limb of the tower limb assembly is provided with two limbs arranged on the bearing platform in the transverse direction of a bridge at intervals, and an upper tower limb is supported on the two limbs; the wall body assembly comprises two side walls which are transversely supported on the bearing platform along the bridge and two ends of which are connected to the inner walls of the two limbs, and a plurality of longitudinal walls which are longitudinally supported on the bearing platform along the bridge and two ends of which are connected between the two side walls; the lower cross beam is supported on the longitudinal wall, and two ends are connected to the two limbs; the steel plates are arranged on joint surfaces of the longitudinal walls and the lower cross beams; the prestressed steel beam penetrates through the lower cross beam, and the two ends of the prestressed steel beam are anchored in the two limbs. The cable bent tower lower tower column structure construction method is suitable for the cable bent tower lower tower column structure. According to the method, mutual constraint among the lower tower limb, the bearing platform and the lower cross beam can be reduced, the construction cost is reduced, and the structural anti-seismic toughness and construction controllability are improved.

This utility model provides a main beam cross-section structure for a long-span, low-tower cable-stayed bridge, relating to the technical field of main beam cross-section structures. It includes a pier body and a top panel. The pier body has an internally reinforced rib structure, and a cap beam is provided on the upper part of the pier body. A first recess is opened in the middle of the cap beam, and a central insert is installed within the first recess. Positioning holes are provided on both the left and right sides of the cap beam, and positioning columns are embedded within these holes. The upper parts of the central insert and positioning columns are fitted into the lower part of the top panel, and two sets of supports are installed between the bottom surface of the top panel and the cap beam. This utility model not only ensures precise alignment and stability of the bridge's central portion, contributing to the stability of the main beam core, but also effectively resists tensile stresses, significantly improving the bridge structure's bending resistance, making it more stable and robust, preventing the generation and development of cracks, and extending the bridge's service life.

This invention provides a high-precision, rapid positioning device for cable guide tubes, comprising a rigid frame and a cable guide tube body, and two positioning device bodies symmetrically arranged on the rigid frame. The two positioning device bodies are located at the upper and lower openings of the cable guide tube body, respectively, with the upper positioning device body higher than the lower one. The cable guide tube body is suspended on the two positioning device bodies. Each positioning device body is equipped with a left-side mileage control mark, an offset control mark, and a right-side mileage control mark for positioning. Positioning is achieved by using left-side, offset, and right-side mileage control marks on the positioning device bodies, eliminating the need for self-made auxiliary positioning covers and avoiding the impact of machining errors of pipe fittings or other components on positioning accuracy.