44 results about "Cross bridge" patented technology

The utility model provides a concrete pouring and distributing device for bridge construction, and relates to the technical field of bridge construction equipment.The concrete pouring and distributing device comprises a supporting frame used for being erected on a bridge deck system pouring formwork, an inclined discharging groove is slidably connected to the supporting frame, and a driving assembly used for driving the inclined discharging groove to move on the supporting frame in the transverse bridge direction is arranged on the supporting frame; the bottom of the inclined discharging groove is evenly provided with a plurality of discharging openings, the discharging openings are connected with a material distribution hose, the lower end of the material distribution hose is provided with a moving trolley, the bottom of the inclined discharging groove is fixedly provided with a guide frame, and the moving trolley is connected with the guide frame in a sliding mode. Concrete falls to different positions of a bridge floor along a plurality of discharging ports of the inclined discharging groove and the material distribution hose, multiple vehicle-mounted concrete pumps do not need to work at the same time, the pumping cost is effectively reduced, the driving assembly drives the inclined discharging groove to move on the supporting frame in the transverse bridge direction, and workers pull the lower end of the material distribution hose to move in the longitudinal bridge direction through the moving trolley. Labor is saved, and the labor intensity of workers is reduced.

The invention discloses a sewage treatment sedimentation tank disinfection device, which relates to the technical field of sewage treatment, comprising: a sedimentation tank body and a cross bridge erected on the sedimentation tank body, a dosing assembly is further arranged at the center of the sedimentation tank body, the sedimentation tank body comprises an outer circle concrete enclosure and an inner circle water reservoir, a clean water trough is arranged on the top of the concrete enclosure, the water reservoir is arranged in a circular shape, which is convenient for accumulating sewage, the dosing assembly comprises a central supporting shaft, a hollow disc is rotatably mounted on the supporting shaft, dosing cantilevers are symmetrically arranged on both sides of the hollow disc for delivering liquid medicine, and the length of the dosing cantilever is less than the radius of the water reservoir, and the present application can push two dosing cantilevers to rotate continuously on the water reservoir as the hollow disc rotates, and the liquid medicine released downward by the dosing cantilever can be evenly spread on the water reservoir, thereby ensuring uniform dosing, facilitating the disinfection of sewage and accelerating flocculation.

The invention discloses a vehicle load identification method based on a multi-modal large model, and the method comprises the following steps: selecting a reference bridge in a region for testing, and obtaining a reference bridge case library; analyzing the new bridge through a multi-modal large model, and matching a plurality of reference bridges most similar to the core characteristics of the new bridge from a reference bridge case library; the multi-modal large model migrates a load response model and model parameters of the reference bridge case to a new bridge through a case reasoning mechanism; and according to the structural difference between the new bridge and the matched reference bridge and the actual working condition of the new bridge, the multi-modal large model carries out architecture reconstruction on the migrated load response model. The method has the beneficial effects that the new bridge can directly reuse the model parameters and the load response rule of the reference bridge through the constructed reference bridge case library in combination with the retrieval enhancement generation and bridge-crossing knowledge migration mechanism of the multi-modal large model, so that the time cost and the economic cost of bridge-crossing deployment can be greatly reduced.

The invention relates to the technical field of bridge slope adjustment jacking, and provides a bridge slope adjustment jacking self-adaptive jacking method which comprises the following steps that a lower layer jacking structure is installed below a cover beam, and an upper layer jacking structure is installed above the cover beam; installing a hydraulic control structure, wherein the hydraulic control structure is used for controlling the vertical jack and the two-way jack to work; based on the slope adjusting jacking requirement, the multiple vertical jacks and the multiple bidirectional jacks are controlled to work through the hydraulic control structure, the jacking heights of the multiple vertical jacks are the same, and the jacking heights and the jacking distances of the multiple bidirectional jacks are different. According to the method, the vertical ascending of the pier column is kept while the upper beam body is jacked according to the theoretical variable slope, and the problem of the overall slope adjustment jacking working condition of the bent bridge and the oblique crossing bridge with the bent cap is solved.

The invention discloses a screeding tool assembly applied to ground mortar leveling construction and a construction method. The screeding tool assembly comprises a screeding support and a screeding push broach. The screeding support comprises a transverse bridge, a rear vertical leg and a front vertical leg are arranged at the two ends of the transverse bridge, the rear vertical leg is provided with two rear supporting feet, and the front vertical leg is provided with a height-adjustable telescopic supporting foot. The screeding push broach comprises a sliding groove assembly, the sliding groove assembly is provided with a roller, an arm plate is installed on the side face of the sliding groove assembly, a screw column is arranged at the lower end of the arm plate, and a fulcrum screw is further installed on the side face of the sliding groove assembly. The invention further comprises a method applied to ground mortar leveling construction. Through a plurality of horizontal supports, straight pipes are placed, and a horizontal track can be formed on the uneven ground, so that mortar can be conveniently pushed and plastered by means of the track; in addition, a leveling tool can be used for pushing and plastering the undulating mortar on the track to form a horizontal rib, the horizontal rib is compacted and plastered to form the rib, the mortar can be scraped to be flat on the rib, and the construction operability and the construction efficiency are greatly improved.

A rubber track iron tooth with limiting teeth convenient to replace comprises a gap bridge, side wings, the limiting teeth and limiting feet, the gap bridge is provided with an assembling area for limiting the assembling positions of the limiting teeth, the assembling area is provided with assembling side faces and an assembling bottom face, the assembling side faces are provided with lateral positioning inserting grooves, and the assembling bottom face is provided with bottom positioning inserting grooves. The limiting teeth are provided with assembly matching side faces making contact with the assembly side faces and assembly matching bottom faces making contact with the assembly bottom faces, the assembly matching side faces are provided with lateral positioning insertion blocks combined with the lateral positioning insertion grooves, and the assembly matching bottom faces are provided with bottom positioning insertion blocks combined with the bottom positioning insertion grooves. And a locking unit is arranged at the inlet end of the bottom positioning slot, has a preset shape and can retract after being extruded. The beneficial effects of the utility model lie in that: can realize toolless, part-free assembly mode, be suitable for fast assembly and convenient assembly.

The utility model relates to the technical field of damping devices, and discloses an improved damping front fork which comprises an upper fork bridge, two front fork sleeves and two spring seats, a vertical pipe is fixedly connected to the middle of the upper surface of the upper fork bridge, and front fork branch pipes are arranged in the front fork sleeves. The upper ends of the front fork branch pipes are fixedly connected with the middles of the two sides of the lower surface of the upper fork bridge, sealing rings are fixedly connected with the upper surfaces of the front fork sleeves, and guide sleeves are arranged in the front fork sleeves. The front fork branch pipe is connected with the upper bridge and the lower fixing piece and is in sliding fit with the front fork sleeve, a stable telescopic structure is constructed, stress is effectively transmitted and dispersed, structural stability under complex road conditions is guaranteed, the damping spring is connected with the spring seat and the fixing piece, vibration energy is efficiently absorbed and buffered, vibration impact is relieved through stretching and retracting of the front fork branch pipe, and the service life of the front fork branch pipe is prolonged. And the guide sleeve and the gasket assist the front fork branch pipe to slide stably, so that the performance of the damping system is improved.

A bearing cap rapid detection tool comprises a supporting seat, the top of the supporting seat is provided with a conveying sliding plate, and the conveying sliding plate is obliquely arranged downwards in the conveying direction; the conveying sliding plate is provided with an upper limit gap bridge plate and a lower limit gap bridge plate, the upper limit gap bridge plate is provided with an upper limit guide groove, and the distance between the groove bottom of the upper limit guide groove and the conveying sliding plate is equal to the upper limit of the specified height size of the bearing cover; and a defective product leading-out inclined surface is arranged at the front end of the upper limit gap bridge The lower limit gap bridge plate is provided with a lower limit guide groove, and the distance between the groove bottom of the lower limit guide groove and the conveying sliding plate is equal to the lower limit of the specified height size of the bearing cover. The front end of the lower limit gap bridge plate is provided with a non-defective product leading-out According to the utility model, the inclined conveying sliding plate is matched with the upper limit gap bridge plate and the lower limit gap bridge plate to automatically detect the height of the bearing cover, so that the measurement efficiency and accuracy are improved; and leading-out inclined planes are arranged at the front ends of the upper limit gap bridge plate and the lower limit gap bridge plate, and the detected bearing caps are classified and discharged through the leading-out inclined planes.

The invention discloses a multi-objective optimization method and system for quality inspection of a super-long span sea-crossing bridge project. The method comprises: obtaining bridge information, wherein the bridge information comprises: bridge axial force, area of ​​a bridge cross section, bending moment of the bridge, torque of the bridge, total span of the bridge, diameter of the bridge, elastic modulus of the bridge, moment of inertia of the bridge cross section, and material density of the bridge; respectively setting a bridge structural safety assessment model for evaluating the structural safety of the bridge, a bridge service life assessment model for evaluating the service life of the bridge, and a bridge construction quality assessment model for evaluating the construction quality, and respectively calculating a bridge structural safety index, a bridge service life assessment index, and a bridge construction quality assessment index; completing a multi-objective assessment of the bridge through the bridge structural safety index, the bridge service life assessment index, and the bridge construction quality assessment index, and optimizing the bridge project quality according to the assessment results.

The invention discloses a device and method for lifting and replacing a support of an existing bridge on a bridge deck, the device comprises bridges, a bridge-crossing connecting beam, a steel support, a steel distribution beam, a constant mechanism, a jacking mechanism, a lifting mechanism and a sensing mechanism, the bridges are oppositely arranged left and right, and the bridge-crossing connecting beam is arranged between the two opposite bridges; the steel supports are evenly arranged on the top of the bridge, the steel distribution beams are arranged on the tops of the steel supports, the constant mechanisms, the jacking mechanisms and the lifting mechanisms are all arranged on the steel distribution beams, and the sensing mechanisms are arranged on the span bridge connecting beams and the jacking mechanisms. According to the scheme, equipment is designed from multiple dimensions, a stable, universal, safe and controllable foundation is provided for replacing supports for bridge floor lifting of an existing bridge, the device is adaptive to different bridges, and real-time monitoring of jacking is guaranteed; meanwhile, by means of efficient equipment utilization, clear force transmission logic and real-time monitoring, efficient and safe construction, energy conservation and environmental protection are achieved, and adverse effects on the environment and traffic are reduced.

The invention discloses a sewage treatment sedimentation tank disinfection device, which relates to the technical field of sewage treatment, comprising: a sedimentation tank body and a cross bridge erected on the sedimentation tank body, a dosing assembly is further arranged at the center of the sedimentation tank body, the sedimentation tank body comprises an outer circle concrete enclosure and an inner circle water reservoir, a clean water trough is arranged on the top of the concrete enclosure, the water reservoir is arranged in a circular shape, which is convenient for accumulating sewage, the dosing assembly comprises a central supporting shaft, a hollow disc is rotatably mounted on the supporting shaft, dosing cantilevers are symmetrically arranged on both sides of the hollow disc for delivering liquid medicine, and the length of the dosing cantilever is less than the radius of the water reservoir, and the present application can push two dosing cantilevers to rotate continuously on the water reservoir as the hollow disc rotates, and the liquid medicine released downward by the dosing cantilever can be evenly spread on the water reservoir, thereby ensuring uniform dosing, facilitating the disinfection of sewage and accelerating flocculation.

A semi-inverted T invisible cap beam structure, where the two sides of the simply supported beams are placed on the inverted T-shaped cap beam, the middle beam of the simply supported beam is provided with a corbel, and the two sides of the corbel are located above the top of the inverted T part of the cap beam. In the longitudinal direction of the bridge, there is a gap between the end faces of the corbels of the middle beams of the simply supported beams on both sides, and there is a gap between the end faces of the side beams of the simply supported beams on both sides, and the gap is processed by the bridge deck continuous or expansion joint structure; in the longitudinal direction of the bridge, the inverted T part of the cap beam is located between the left and right simply supported beams, in the transverse direction of the bridge, the inverted T part of the cap beam is located between the side beams on both sides, and in the height direction, the inverted T part of the cap beam is located below the middle beam corbel, so that the inverted T part of the cap beam is blocked by the simple supported beams on both sides in the above three directions, achieving an invisible effect. It has the advantages of low building height of conventional inverted T cap beams, and at the same time, the inverted T part of the cap beam can be blocked by the simply supported beams, and there is only one gap left at the bridge deck. Compared with conventional inverted T cap beams, it has the unique advantages of simple continuous bridge deck construction, good driving comfort, and good landscape effect.

The invention discloses a channel-crossing bridge demolition construction device and method, belongs to the field of bridge demolition, and comprises the channel-crossing bridge demolition construction device and method. According to the channel-crossing bridge demolition construction device, the transverse pull rope is pulled through the support structures arranged on the two sides of the bridge, meanwhile, the pipeline is fixed to the transverse pull rope, the transverse pull rope is reinforced through the inclined pull rope, the drooping amount of the transverse pull rope is reduced, then the pipeline is protected conveniently, construction and disassembly are convenient, and the channel-crossing bridge demolition construction device is suitable for large-span bridge demolition construction; the construction method comprises the following steps of: 1, arranging the channel-crossing bridge demolition construction device, arranging the channel-crossing bridge demolition construction device, and arranging the channel-crossing bridge demolition construction device; 2, a bridge deck system and ancillary facilities are dismantled; 3, dismantling the beams and the slabs; 4, dismantling the cover beams and the stand columns; fifthly, the straining beams and the pile foundations are dismantled; and sixthly, the bridge abutment is dismantled. Bridge dismantling is achieved step by step, and navigation of a river channel below the bridge is not affected.

The invention discloses a multi-mode dynamic protective net system for actively defending invasion of unmanned aerial vehicles and foreign matters on a bridge deck, and belongs to the technical field of crossing of bridge deck safety protection and intelligent monitoring. The system is composed of a carbon fiber protective net, a pressure sensor, an alarm and the like. The system adopts a three-stage progressive protection structure, wherein the first stage is a telescopic high-strength carbon fiber protection net and integrates pressure-fiber grating dual-mode sensing; the second stage is a rotary aviation aluminum intercepting rod array and has flexible buffering and servo driving 0-360-degree intercepting functions; and the third level is a laser curtain wall and millimeter wave radar combined barrier which can be linked with an electromagnetic interference device to carry out forced landing on illegal unmanned aerial vehicles. Each layer of protection is visualized in real time through a bridge BIM model expression system, and impact positioning, deformation evaluation, trajectory tracking and multi-source data fusion are achieved. According to the system, the low-altitude safety protection capacity of the large river-crossing / sea-crossing bridge is remarkably improved, and the system can be widely applied to various bridge types such as bridge bridges and arch bridges.

The invention relates to the technical field of transfer bridge building, in particular to a method for building a cross-track temporary transfer bridge for entering business line construction equipment, and the safety, the stability and the efficiency of building the cross-track temporary transfer bridge are improved. The method comprises the following steps: acquiring multi-dimensional structure data and construction equipment basic parameters of a business line construction site; carrying out feasibility analysis on the multi-dimensional structure data to obtain a transfer bridge erection supporting point position set; carrying out stress analysis on the basic parameters of the construction equipment to obtain a load-bearing lower limit index of the transfer bridge; according to the transfer bridge erecting supporting point position set and the transfer bridge bearing lower limit index, a station track-crossing temporary transfer bridge erecting scheme is formulated; building a test transfer bridge outside the yard according to the cross-track temporary transfer bridge building scheme, carrying out a load-bearing test on the test transfer bridge, and obtaining a transfer bridge building optimization scheme according to the building process and the load-bearing test result; and the transfer bridge erecting optimization scheme is applied, construction materials and personnel are arranged, and erecting operation of the station track-crossing temporary transfer bridge is carried out.

The application discloses a vehicle load identification method based on a multi-modal large model, which comprises the following steps: selecting a reference bridge in a region for testing to obtain a reference bridge case library; analyzing a new bridge through a multi-modal large model to match a plurality of reference bridges with the closest core characteristics of the new bridge from the reference bridge case library; the multi-modal large model migrates the load response model and model parameters of the reference bridge case to the new bridge through a case reasoning mechanism; and the multi-modal large model reconstructs the migrated load response model according to the structural differences between the new bridge and the matched reference bridge and the actual working conditions of the new bridge. The application has the beneficial effect that, through the constructed reference bridge case library, the generation of the multi-modal large model retrieval enhancement and the cross-bridge knowledge migration mechanism, the new bridge can directly reuse the model parameters and load response law of the reference bridge, thereby greatly reducing the time cost and economic cost of cross-bridge deployment.

The utility model relates to the technical field of continuous beam monitoring, and discloses an automatic monitoring device for continuous beam expansion of a river-crossing bridge, which comprises a transverse supporting plate, vertical bars are detachably mounted at four corner ends of the transverse supporting plate, and a plurality of displacement type fixing structures are slidably mounted at the top of the transverse supporting plate. And a fiber grating sensor is detachably mounted on the displacement type fixing structure. According to the automatic monitoring device for the expansion of the continuous beam of the river-crossing bridge, the fiber grating sensors are detachably mounted on the displacement type fixing structure, the displacement type fixing structure is movably fixed on the transverse supporting plate, when each fiber grating sensor is mounted, drilling pre-embedded mounting is not needed, the drilling process is optimized, the working efficiency is improved, and the cost is reduced. Meanwhile, the distance between every two adjacent fiber grating sensors can be rapidly and accurately adjusted, repeated drilling operation is not needed when the sensors are repaired or replaced subsequently, the sensors can be directly disassembled, replaced and repaired, and the maintenance cost is reduced.

The application provides a method for combined construction when a dike underpasses a railway roadbed, which comprises the following steps: firstly, constructing a roadbed overhead system, overhead existing railway roadbed sections in a flood discharge range, removing the existing railway roadbed in the flood discharge range, and casting a continuous rigid frame; secondly, constructing a cross bridge head at the intersection of the dike planning axis and the existing railway roadbed axis to form the main body of the dike underpassing the railway section; thirdly, constructing structural dikes at both ends of the cross bridge head and backfilling the dikes; and finally, removing the roadbed overhead system; in the construction process, pile foundations are arranged for all structures to reduce the deformation influence of the additional load of the new project on the existing railway. The application effectively solves the technical problems of the space limitation of the dike underpassing the railway roadbed, the structural space shortage, the high requirement for the settlement deformation control, and the difficulty in railway operation and construction in the new river regulation project, and meets the use requirement of the new project under the premise of ensuring the safe operation of the existing railway.

The utility model discloses a mass block suitable for the tuned mass damper of cross-sea bridge, it includes the mass block body of inside hollow, the inside hollow inside filling has counterweight of mass block body, and mass block body includes the front end body and rear end body of being connected, and the front end body is hemispherical shell, and the rear end body is streamline shell, the utility model discloses under the sea current impact, and the front end body is located upstream and first receives the impact, and the rear end body is located downstream and rear end body is streamline and can destroy tail flow field, dissipate impact energy, reduce the water flow resistance that mass block whole received, effectively improve mass block stress performance.

The utility model discloses a kind of river-crossing bridge deck water taking devices, including the support mechanism for crossing bridge deck left and right width, water taking mechanism and the cross-width passageway assembly of being laid on support mechanism, water taking mechanism includes water pump, main pipeline, branch pipeline, tee joint and electric cabinet, electric cabinet is electrically connected with water pump, the water outlet of water pump is connected with the first end of main pipeline, the second end of main pipeline is connected with two branch pipelines by tee joint, to realize water supply to bridge deck left and right width simultaneously;The river-crossing bridge deck water taking device of the utility model, when encountering river-crossing bridge deck water taking device or water receiving vehicle failure, when needing overhauling, can directly cross width through cross-width passageway assembly, to install electric cabinet side and disconnect total power supply, avoid from one-way long distance detour, other special circumstances need to cross width, all can from here, safety condition meets requirement, save a lot of detour time, it is simple in structure, convenient to operate, can realize bridge deck left and right width water taking simultaneously.

A kind of plane small curvature measuring instrument and its using method belong to the technical field of ultra-precision measuring instrument.The torsion spring gauge is inserted in the middle of cross bridge, the outer side is sleeved with slider two and slider one, slider two and slider one are symmetrically arranged on the two sides of torsion spring gauge, slider two is contacted with contact three and contact two, and slider one is contacted with contact one.The method is as follows: three contacts are placed on the standard surface to calibrate the reference surface;the present application is placed at any angle, the torsion spring gauge probe is contacted with the measured plane area, the torsion spring reading is read, the plane curvature is calculated;the above step is repeated after changing the angle of measuring instrument multiple times;contact deformation compensation calculation is carried out to realize accurate measurement.The present application detects the small curvature of the measured surface by using torsion spring gauge, can realize in-situ measurement, can directly measure in the working site such as grinding machine, avoids positioning reference error caused by offline detection, is closer to actual processing condition, and small size measuring instrument can improve measuring speed.

The utility model relates to the technical field of building electrical engineering, and discloses a double-layer multi-channel cross bridge structure which comprises a bottom frame, supporting plates, partition plates and auxiliary partition plates. The bottom frame is of a cross-shaped structure, and a bridge structure is arranged in the opening direction of the bottom frame. According to the utility model, the double-layer multi-channel bridge structure composed of the bottom frame and the partition plate is arranged, and the bridge is divided into an upper space and a lower space by taking the partition plate as a boundary in the area of the bottom frame of the bridge, so that cables and wires are arranged in the bridge in a layered manner by taking the partition plate as the boundary, the appearance quality of bridge installation is improved, the construction efficiency is improved, and the reduction of the construction cost is facilitated.

The utility model relates to a rectifier bridge module with a current monitoring function, which comprises pins, a carrier plate, a span bridge, a current monitoring span bridge, a Hall current sensor, an insulating cover and six rectifier diodes, and is characterized in that the carrier plate, the span bridge, the current monitoring span bridge, the Hall current sensor and the rectifier diodes are all positioned in the insulating cover; the pins comprise a direct-current anode pin, a direct-current cathode pin and three alternating-current pins; the carrier plate comprises a left current-conducting plate, a right current-conducting plate, a substrate, a current monitoring current-conducting plate and three middle current-conducting plates; the left current-conducting plate, the three middle current-conducting plates and the right current-conducting plate are sequentially arranged from left to right, the three middle current-conducting plates are sequentially arranged from top to bottom, and the current monitoring current-conducting plate is arranged below the right current-conducting plate. The beneficial effects of the utility model are that current monitoring can be realized, the Hall current sensor is arranged in the insulation cover, the anti-interference capability and the consistency are strong, the overall size is small, the installation steps are few, and the cost is reduced.

The utility model provides a paper side positioning device which comprises a panel and gap bridge plates, the two gap bridge plates are arranged on the two sides of the panel, the two gap bridge plates and the two sides of the panel are installed on supporting plates, the two ends of the supporting plates are installed on stand columns respectively, the lower end of the panel is provided with two installation plates, the installation plates are installed between the two supporting plates, and the two installation plates are installed on the stand columns respectively. A lead screw is mounted between the mounting plate and the supporting plate, two ends of the lead screw are mounted on bearings, the bearings are mounted on the mounting plate and the supporting plate, one end of the lead screw is connected with a speed reducer, the speed reducer is connected with a motor, the speed reducer is mounted on the mounting plate, a lead screw nut is mounted on the lead screw, a supporting block is mounted at one end of the lead screw nut, and a side panel is mounted at the top of the supporting block. The supporting block is provided with a side returning plate, the side returning plate is perpendicular to the supporting plate, and paper of different sizes can be well supported and positioned.

The application provides a kind of multi-layer energy dissipation structure's water passing bridge pile foundation anti-scour device and method, it is related to bridge foundation engineering technical field, including pile foundation, inner sleeve and outer sleeve, the lateral wall of inner sleeve is equipped with a plurality of first flow guide holes;The lateral wall of outer sleeve is equipped with a plurality of second flow guide holes;A plurality of second flow guide holes are arranged along the first helix line of the cylinder wall of outer sleeve, and the connecting line of the center of a plurality of second flow guide holes forms the first spiral track along the circumference of outer sleeve;A plurality of first flow guide holes are arranged along the second helix line of the cylinder wall of inner sleeve, and the connecting line of the center of a plurality of first flow guide holes forms the second spiral track along the circumference of inner sleeve;The spiral direction of first spiral track is opposite to the spiral direction of second spiral track.The application solves the problems of low energy dissipation efficiency and poor jet interference effect of the bridge pile foundation anti-scour device in the prior art.

A main bridge of the cable-stayed bridge comprises a low tower, a high tower, a main beam and a stay cable, the low tower and the high tower are arranged in the longitudinal direction of the bridge, the main bridge is divided into a first side span, a middle span and a second side span which are sequentially arranged, the main beam is supported on the low tower and the high tower, and the stay cable is supported on the middle span. The main beam is arranged between the low tower and the high tower and is divided into a main beam weight area located in a side span and a main beam standard section located in a main span by the low tower and the high tower, a vertical support is arranged between the low tower and the main beam, and the high tower and the main beam are fixedly connected through tower beam piers, so that the main bridge forms a'consolidation + semi-floating 'structural system; the low tower and the high tower adopt single-column type bridge towers in the transverse bridge direction, the vertical surface of the appearance is in a swan neck shape, a lower tower column adopts a variable cross-section straight line form, an upper tower column adopts a uniform cross-section section, and the uniform cross-section section of the upper tower column in the bridge direction adopts a circular curve shape in the vertical direction. According to the scheme, the structure is attractive, the structure is reasonable, and design and construction are convenient.

The invention discloses a nuclear fuel element detection device and method based on gamma ray imaging and neutron activation, and relates to the technical field of nuclear fuel element detection, the detection device comprises a mechanical structure, a shielding structure, a transmission structure and a measurement control structure; the mechanical structure comprises a support assembly. The shielding structure comprises a first lead chamber, a second lead chamber and a third lead chamber which are installed on the support assembly at intervals. The transmission structure comprises a span bridge installed on the support assembly, an objective table is installed on the span bridge, and the objective table moves on the span bridge through power provided by a traction structure. The span bridge is provided with a limiting sensor used for providing position information of the objective table. The measurement control structure comprises a PLC control system. According to the device and the method, the neutron activation technology and the gamma ray imaging technology are integrated, and the 235U uniformity and the enrichment degree of the fuel element can be accurately and rapidly detected.

The utility model relates to the technical field of rail transit, and provides an anti-seismic limiting device and system of a ballastless track system.The device comprises a first connecting plate, a second connecting plate, a first limiting part and a first energy consumption piece, and the first energy consumption piece is connected to the first connecting plate and the second connecting plate; the first connecting plate and the second connecting plate are relatively close to or away from each other in the transverse bridge direction so that the first energy dissipation piece can deform, and the first limiting part is used for limiting the maximum displacement of the first connecting plate relative to the second connecting plate. According to the device, transverse dislocation between the roadbed slab and the bridge deck can be reduced, disengagement of the roadbed slab and the bridge deck is avoided, and the operation safety of a ballastless track system is improved.

The utility model relates to a hub measuring instrument, and relates to the field of machining. The hub measuring instrument is used for measuring hub machining precision and comprises a depth gauge, a gap bridge ruler and a locking device. The depth gauge and the gap bridge ruler are fastened and connected through a locking device; the depth gauge comprises a main ruler and a vernier frame, and the main ruler is slidably connected with the vernier frame; the vernier frame is fastened on the gap bridge ruler through a locking device; the vernier frame comprises a sliding groove and an abutting portion which are connected with each other, the sliding groove is arranged on the main ruler in a sliding and sleeving mode, and the abutting portion is fastened on the gap bridge ruler through a locking device. The main ruler is perpendicular to the gap bridge ruler. The main ruler is perpendicular to the abutting part. The device is durable, high precision is kept, and the machining precision of hubs of different specifications is measured through the depth gauge.

This utility model belongs to the field of safety passage technology and discloses a pedestrian safety passage for bridge crossings, including a support frame and a safety passage component for covering the support frame. The safety passage component has through slots on the left and right sides and a square slot on the rear side. A light-shielding component is embedded at the top of the safety passage component. A folding ladder rotates inside the safety passage component. The first and second steps have two states: when the first and second steps are in a vertical state, the folding ladder is in a folded state; when the first and second steps are in a parallel state, the folding ladder is parallel to the safety passage component. Through the above solution, the problems of adding two sets of fixed ladders at the entrance and exit, requiring simultaneous movement on both sides when movement is needed, resulting in inconvenience, and the need for passages to withstand high humidity and strong corrosion environments during the construction of bridges across rivers, where passages built with ordinary steel are prone to rust and reduced structural stability, are solved.