220 results about "Long span" patented technology

This invention discloses a combined large-span formwork support system, relating to the field of building formwork construction technology. It includes load-bearing members and force-transmitting members; the load-bearing members have a steel beam-like structure, including a top plate and a connecting part located below the top plate. The top plate is provided with wooden board fixing holes for fixing wooden formwork and steel plate fixing holes for fixing steel formwork. The load-bearing members are connected to form a main frame via connecting supports, and force-transmitting members are arranged within the main frame to form a spatial force-bearing grid skeleton. The load-bearing members are rigidly connected to the force-transmitting members via the connecting parts; the formwork panels are directly installed on the top plate of the spatial force-bearing grid skeleton through the load-bearing members. The rigid connection of multiple force-transmitting members via connecting supports forms an integrated spatial force-bearing grid skeleton, resulting in more direct force transmission, simplified component types, reduced installation layers, and improved construction efficiency. The wooden board fixing holes and steel plate fixing holes enable the formwork system to be compatible with both wooden and steel formwork.

This utility model relates to a sliding frame device for assembling a large-span steel arched roof structure. It includes a frame sliding track assembly, a frame sliding support assembly, a main frame assembly composed of multiple tower crane standard sections, an adjustable top component, a traction mechanism, and a fixing mechanism. The frame sliding support assembly is installed on the frame sliding track assembly and can slide on it. The main frame assembly is mounted on the frame sliding support assembly. The adjustable top component is installed above the main frame assembly. The traction mechanism is installed at the end of the frame sliding track assembly to connect to the main frame assembly and adjust and fix its position. This sliding frame device has an ingenious structure, is easy to operate, and has a high degree of automation. It effectively reduces the workload of working at heights, improves installation efficiency, reduces labor costs, significantly lowers the risks of working at heights, and enhances the user experience for construction workers.

The application provides a large-span special-shaped curved surface curtain wall installation method based on BIM, three-dimensional modeling and virtual assembly are performed on the outer contour steel structure to form a complete skeleton structure; the outer contour steel structure is divided into a plurality of unit planes in a virtual space; a plurality of target plates are installed on the unit planes, and the positions of the target plates are measured by using a measuring device; the production and manufacturing of curtain wall fittings are guided according to the deformation amount of the outer contour steel structure, and the curtain wall is installed by using the curtain wall fittings; the positions of the target plates are measured again and recorded; the above steps are repeated to install curtain wall glasses of another unit plane, until all the outer side surface curtain wall glasses of the outer contour steel structure are installed, and the problem of difficult installation and positioning of the special-shaped curved surface glass curtain wall is solved.

1. Name of the product in this design: Cable tie rod (large span lightweight). 2. Purpose of this design: Used in the field of communication equipment to organize and fix cables, and to ensure the stability of the cable tie structure. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model provides a flexible large span crane beam's trolley, include: trolley frame, the upper portion fixed connection of trolley frame has the support assembly for connecting the support end of crane beam, the below of trolley frame is installed wheel group, the support assembly includes: hinge base support, bearing group and support plate, bearing group installs between the support plate of symmetry two sides, the through -hole is opened in hinge base support, hinge base support is set on bearing group through the through -hole, one end of hinge base support is fixedly connected with the support end of crane beam, and the other end is connected with trolley frame through bearing group, bearing group includes: joint bearing, positioning sleeve and pin shaft, joint bearing is coaxially set on the outer ring of pin shaft, to compensate the dynamic deformation in the operation of crane beam, at least two positioning sleeves are symmetrically set on the both ends of joint bearing, to limit the movement of joint bearing along the axial direction of pin shaft.

The present application relates to a kind of steel pipe concrete structure system bearing calculation method, it is related to concrete structure calculation technical field, the present application has accurately captured the critical transition point of steel pipe and concrete from emptying to being extruded by nonlinear mapping function, eliminates the deviation of initial gap to tight hoop coefficient estimation, and introduces steel pipe wall sealing factor, accurately restores the real deformation characteristics of concrete in pipe under the coexistence environment of self-drying and high humidity, avoids the problem of low estimation of stiffness caused by copying ordinary concrete creep model, dynamically simulates the modulus deterioration process with time variation, clearly reveals the trajectory of stress transfer from concrete to steel pipe, provides accurate data input for analyzing local instability of steel pipe under long-term service, simultaneously coupled with bidirectional stress criterion, so that designer can obtain the real bearing capacity margin of structure in the whole service process, significantly enhance the long-term safety and reliability of super high-rise and large-span structure under extreme environment.

This utility model discloses a fracture-resistant bolt connection pair structure for long-span steel bridges, including a bolt body, an anti-loosening nut assembly, an anti-corrosion washer assembly, a first steel bridge connection plate, and a second steel bridge connection plate. This utility model relates to the field of steel bridge connection structure technology. This fracture-resistant bolt connection pair structure for long-span steel bridges forms a dual stress dispersion structure through a tapered connector between the bolt head and the bolt segment, and four U-shaped stress relief grooves on the bolt segment. This significantly reduces the stress concentration coefficient at the bolt connection, preventing fatigue crack initiation under long-term alternating loads. Simultaneously, the main nut and auxiliary nut, in conjunction with an annular boss, compress the nitrile rubber elastic bushing, continuously compensating for preload attenuation caused by vibration, achieving a preload retention rate of over 90%. This solves the problem of uneven bolt stress caused by loosening of traditional nuts. It ensures the fracture-resistant performance of the bolt connection pair from both "fatigue resistance" and "loosening prevention" dimensions, meeting the core stress requirements of long-span steel bridges.

The application provides a sandwich combination structure lower hanging steel beam coordinate precision control method, and belongs to the technical field of wind tunnel construction. The application establishes an independent reference control network, sets a forced closed control point to block error linear transmission, calculates the lower hanging steel beam camber, and offsets the dead load deflection through reverse prefabricated bending processing. A buried part rigid positioning frame is installed and the position deviation is monitored. A hydraulic synchronous jacking device is used to iteratively adjust the posture of the steel beam. Pre-stressed tension is applied to realize reverse arch shaping. Finally, the least squares adjustment technology and the minimum spanning tree optimization algorithm are used to reasonably distribute the section cumulative error between the forced closed control points, thereby solving the technical problem of excessive steel beam coordinate precision caused by large-span multi-section construction cumulative error.

This utility model discloses an installation structure for a sunroom, relating to the field of building structure technology. It includes a base, with a top column fixedly connected to the top of the base. A roof structure is installed at the top of the top column. The roof structure includes a first connecting beam fixedly installed on one side of the top column. A first horizontal beam is fixedly connected to one end of the top column, and a first inclined beam is fixedly connected to the top of the top column. A top structure is fixedly connected to the top of the first inclined beam. This utility model, through the design of the support components and the top structure, uses a support component consisting of a first support member, a connecting block, and a fifth connecting member, vertically connecting the first and second horizontal beams. This evenly transfers the roof load to the base, significantly improving the bending resistance of large-span roofs and solving the problem of insufficient structural load-bearing capacity preventing the use of large-span structures. The design of the support components and the top structure makes this sunroom suitable for building large-span sunrooms.

The application discloses an empty-web grid super-long viewing platform and cantilever large-span canopy integrated structure, which is characterized by comprising a roof cantilever truss, a viewing platform, a facade supporting grid and a truss supporting column, the facade supporting grid is fixed to a floor, and the top end of the facade supporting grid is supported at the bottom of the roof cantilever truss; the roof cantilever truss comprises a cantilever section and a balance section, the viewing platform is arranged on the balance section, and the cantilever section and the balance section are connected at the truss supporting column and extend to the center of the stadium. According to the application, the traditional roof structure of the stadium is optimized, the roof structure is designed into a cantilever plane truss structure, the balance section can be reasonably constructed in the roof cantilever truss structure, the floor plate can be arranged in the balance section to realize the construction of the viewing platform, and the landscape resources in the sports park can be effectively displayed.

The utility model relates to the field of building construction technology provides a kind of support bracket structure and the support system of large-span pouring beam plate cover structure, support bracket structure includes multiple counter-pulling screw rods, two support assemblies and multiple bolts, multiple counter-pulling screw rods are used to be arranged in column, multiple counter-pulling screw rods are parallelly arranged;One support assembly is located at the one end of counter-pulling screw rod, and is abutted to the side of column, another support assembly is located at the other end of counter-pulling screw rod, and is abutted to the other side of column, and support assembly is equipped with support plane;Multiple bolts are separately arranged at the two ends of multiple counter-pulling screw rods, and bolt is used to connect counter-pulling screw rod and support assembly, and each bolt corresponds the one end setting of a counter-pulling screw rod.The utility model is through the counter-pulling screw rod of being arranged in column cooperation bilateral support assembly and forms stable support structure, realizes quick assembly positioning using bolt, with the advantages of simplified structure, high support stability and easy installation positioning.

This invention discloses a comprehensive parameter design method for the cross-section of long-span highway tunnels. Using tunnel flatness ratio and equivalent initial support strength as two variables, and with tunnel safety and economy as dual objectives, it employs numerical simulation and regression analysis to establish evaluation indicators and objective functions for flatness ratio and initial support. Based on survey results, the range of variables for flatness ratio and equivalent initial support strength is determined. Safety constraints are defined according to safety requirements. A non-dominated sorting genetic algorithm is used to perform optimization calculations within the specified variable range and constraints to obtain mutually suitable tunnel cross-section flatness ratio and equivalent initial support strength. Furthermore, the equivalent initial support strength is transformed into support form and parameters, ultimately forming the optimal initial support parameters for long-span tunnels. This method overcomes the shortcomings of traditional long-span highway tunnel design methods that only consider safety or economy as a single objective, and solves the problem of relying on manual experience to determine the optimal flatness ratio and initial support parameters.

The application discloses a large-span steel structure closure construction method in a low-temperature environment, and is based on a design closure temperature, a plurality of key stress components of the large-span steel structure are screened out through a structure design software; a heating piece is coated outside the key stress components and a temperature measuring piece is installed; a controller is connected to the heating piece and the temperature measuring piece; the temperature measuring piece collects real-time temperatures of the key stress components; the controller acquires the real-time temperatures, and the heating piece is controlled by the controller to heat the key stress components to the design closure temperature; and the large-span steel structure is subjected to closure supplemental rod component welding. The application solves the problem that long-span steel structures are not suitable for closure in northern regions of China due to low and long winter temperatures.

The application discloses a kind of fusion wear and weave wood's large-span wood structure and erecting method, including load-bearing component, arch component, roof beam component, roof component, load-bearing component is equipped with two, two load-bearing component interval arrangement, arch component includes multiple arches, multiple arches are interval arrangement along the length direction of load-bearing component, the middle part of arch is upwardly convex into arch, two ends of arch are fixedly connected with load-bearing component, arch adopts the way of weave wood and is formed, roof beam component is fixedly arranged in the top of arch component, roof beam component adopts the way of wear and is formed, roof component is installed in the top of roof beam component and load-bearing component, the present application is by using the way of weave wood interlocking arch as core stress main body, to small type structure strip splicing formation large-span arch structure, without relying on large diameter long material, reduce material cost, the arch of arch component Stress system can realize large-span columnless indoor space, solve the problem of traditional lifting beam structure dense column, space partition is limited.

This invention discloses a large-span curved ceiling structure and its construction method, comprising: two opposing wall beams forming a through first groove; a curved ceiling plate, both ends of which are connected to the two wall beams, the inner curved surface of which forms a through second groove, and the two opposite groove walls of the second groove forming through limiting channels; multiple ceiling panels, the outer curved surfaces of which are fitted to the inner curved surfaces of the curved ceiling plate, the outer curved surfaces of which form first sliders sliding in the second groove, the first sliders forming anti-detachment protrusions sliding in the limiting channels; support end plates, both ends of the ceiling panels being connected to support end plates, the sides of the support end plates forming second sliders sliding in the first groove; and locking plates, which are slidably installed in the second groove and detachably mounted on the first sliders, the first flange plates at both ends of the locking plates being detachably connected to the groove walls of the second groove. This invention solves the problems of complex installation structure and low installation efficiency in existing curved ceilings.

The invention involves a triangular prismatic tuned mass damper suitable for large-span or cantilever structures, including a triangular prism box, particle damping units inside the triangular prism box, and a steel mass block. Below the triangular prism box are high-damping springs. The particle damping unit consists of a particle damping cavity, particles of three different sizes, and foam rubber pads. When the structural vibration amplitude is small, the particles dissipate energy by compressing the foam rubber pads and rolling. When the amplitude of structural vibration is large, the energy is dissipated by the collision of particles and the compression of the foam rubber.

This invention relates to the field of aqueduct construction technology, and discloses a method for on-site construction of a U-shaped aqueduct body based on a self-propelled trenching machine, as well as the self-propelled trenching machine itself. It aims to solve the technical problems of poor structural adaptability, insufficient construction stability, difficulty in precision control under complex working conditions, and inefficient construction organization when using conventional bridge mobile formwork for the construction of large-span U-shaped thin-shell aqueducts in the prior art. The invention includes the following steps: S1. Equipment assembly and anti-overturning reinforcement; S2. Pre-stressing and positioning of the formwork structure; S3. Installation of reinforcing steel and prestressed structure; S4. Positioning of the inner formwork anti-buoyancy structure; S5. Concrete pouring and curing; S6. Prestressing tensioning and grouting; S7. Equipment demolding and longitudinal movement through holes; S8. Formwork closing and cyclic construction. The self-propelled trenching machine of this invention, by setting a horizontally opening and closing lower hanging beam and a foldable hydraulic inner formwork structure, enables the formwork to accurately adapt to the complex hyperboloid contour and ultra-large width of the U-shaped aqueduct, solving the structural adaptability problem of conventional formwork.

The application discloses a large-span photovoltaic support arranged on a steep hillside, and solves the problem of how to arrange a large-span photovoltaic support on a stone hillside; a cast-in-situ concrete long strip pile cap (5) is cast on a gravel backfill layer (2) at the bottom of the hillside, a bottom support column (6) is arranged on the concrete long strip pile cap (5), a middle support column (7) is arranged on a large isolated rock (3) arranged in the middle of the stone hillside (1), a top support column (9) is arranged on the cast-in-situ concrete long strip pile cap (5), and a large-span support (10) is arranged between the bottom support column (6), the middle support column (7) and the top support column (9); the stable arrangement of the large-span support is realized, and the operation safety of photovoltaic modules is ensured.

This invention discloses a high-elasticity modulus concrete and its preparation method. The high-elasticity modulus concrete comprises, by weight, cementitious materials: volcanic rock: river sand: water: water-reducing agent in a ratio of 575:990:755:115:(20-22). The cementitious materials, by weight, comprise: cement: fly ash: silica fume in a ratio of (375-435):85:55. This invention utilizes volcanic rock as coarse aggregate to construct a rigid skeleton, and incorporates cementitious materials to leverage their synergistic physical filling and volcanic ash effect, optimizing the matrix density and interfacial transition zone structure. Combined with ultrasonic-assisted mixing, it achieves uniform dispersion and efficient hydration of fine materials. This concrete exhibits high compressive strength and high elastic modulus, demonstrates low shrinkage and creep characteristics, good volume stability, and excellent durability. It is suitable for high-rise and super high-rise buildings and large-span structural engineering, significantly improving structural stiffness, saving building materials, and increasing usable space utilization.

The application discloses a kind of super-large span arch bridge main arch ring large scale model test methods, it is related to bridge engineering test technical field, including: clear real bridge main arch ring core parameter and construction technology, determine scale ratio and physical parameter similarity ratio;Design adaptive model structure and material;Build array type self-balancing loading device, optimize each construction stage load load;Arrangement contains temperature compensation multi-means test system;Set up lateral limiting device, guarantee the stability of structure in the process of test;According to the process of real bridge, simulate construction and collect data in stages;Data are processed and compared with simulation results to verify.The application can realize high degree of restoration simulation in construction process, loading is stable, testing is accurate, and the test results can truly reflect the mechanical behavior of the real bridge, providing reliable support for the design and construction of super-long span stiff skeleton concrete arch bridge.

The application discloses a large-span high-rise building fiber reinforced cement removable formwork, and belongs to the technical field of building engineering formwork, which comprises a fiber reinforced cement connecting formwork, the front and back sides of the fiber reinforced cement connecting formwork are respectively provided with a plug-in groove and a plug-in block, the size of the plug-in block is matched with the plug-in groove, the plug-in block is plugged into the inside of the plug-in groove, one side of the fiber reinforced cement connecting formwork is provided with a sliding strip, and the other side of the fiber reinforced cement connecting formwork is provided with a sliding groove; when the application is used, the installation of the formwork can be quickly completed; compared with wooden formwork and steel formwork, the fiber reinforced cement connecting formwork has the characteristics of good light weight and high strength, is removable in the subsequent process, is convenient to use, does not need to be disassembled, the traditional wooden formwork and steel formwork have the problems of low construction efficiency and serious material waste in large-span high-rise buildings, and the application is more convenient to use and improves the practicability of the device.

The utility model relates to a kind of large-span steel truss positioning installation jig frame, it includes: conversion beam, multiple roots are interval arranged between;Stand, interval installation is set on conversion beam;Crossbar, it is horizontally installed between two stand;Horse path bracket, it is horizontally installed in the two sides of stand;First horse path beam, interval installation is set on horse path bracket;Steel pull net, it is laid on first horse path beam;Cushion beam, it is horizontally installed on the upper end of stand;Backing plate, it is respectively installed on cushion beam and crossbar;Baffle, it is installed in the two sides of backing plate;First galvanized steel pipe, it is installed on the first horse path beam of side side;Temporary stair, first channel steel is installed in its upper front side, the first channel steel sliding assembly is on first galvanized steel pipe, and foot brake wheel is installed in its bottom four corner positions.The utility model is favorable for construction personnel flexible work, can choose construction position along jig frame longitudinal direction, and various appliances required for construction are flexibly transported.

The utility model discloses a road road sealer, including the baulk, the towrope, the pivot and the drive arrangement, the pivot verticality is established, and the drive arrangement is connected with the pivot transmission, and the drive arrangement is used for driving the pivot rotation, the baulk is along the direction perpendicular to the pivot and is established, and one end of baulk is connected with the pivot, one end of the towrope is connected with the pivot, and the other end of the towrope is connected with the baulk, and the connecting point of pivot and the towrope is higher than the connecting point of pivot and the baulk, and the connecting point of the towrope and the baulk is close to one end of the baulk and away from the pivot. The technical effect reached is: through the pivot drive baulk horizontal horizontal rotation to carry out the road interception, and through the towrope auxiliary tow baulk, the overall structure is stable, can significantly reduce the flexure deformation of baulk because of dead weight and wind load, makes it still can keep stable operation under the condition of super long span, can greatly extend the applicable length of baulk, breaks through the span limit of traditional road sealing device, is especially suitable for wide road, large span tunnel etc. scene.

This invention proposes a method for multi-target recognition, tracking, and vibration extraction of bridge cable-stayed bridge videos based on unmanned aerial vehicles (UAVs). The method includes: Step 1: Constructing a refined tilted and slender target detection model for bridge cable-stayed bridges based on the YOLOv11 model; Step 2: Proposing a multi-target tracking algorithm that integrates the tilted and slender target detection model and the StrongSORT algorithm; Step 3: Improving the displacement extraction method by combining SIFT / ORB feature point matching and sub-pixel refinement techniques; Step 4: Designing a UAV motion correction algorithm based on variational mode decomposition and time-frequency domain joint screening; Step 5: Constructing a joint working mode analysis algorithm that combines natural excitation technology and random subspace recognition algorithm. This method achieves high-precision extraction of cable-stayed bridge vibration signals and identification of cable-stayed bridge modal parameters, providing technical support for health monitoring of long-span cable-stayed bridges.

Disclosed is an assembly method of a long-span truss, relating to the field of construction engineering. The method includes the following steps: column-top trusses are pre-assembled at column tops of structural columns. Middle trusses are assembled on platforms between adjacent structural columns. Column-top hydraulic lifting devices are installed on the column-top trusses. Hoisting points are provided at both ends of the middle truss. The column-top hydraulic lifting devices are connected to corresponding hoisting points. The middle truss is lifted to a design height. The middle truss is connected to the column-top truss. The column-top hydraulic lifting devices are dismantled.

The present application relates to photovoltaic power generation technical field, especially to a kind of fish belly type flexible photovoltaic support system and its construction method.Support system includes support system and bearing system;Support system includes side support structure, side support structure includes uplift foundation and compression foundation, uplift foundation is located at the outside of compression foundation, support column is set on compression foundation, uplift foundation is connected with support column by cable-stayed rod;Bearing system is installed on the support column at both ends, including load-bearing cable and reinforcing cable, photovoltaic module is installed on load-bearing cable, reinforcing cable has double cable that is arranged in vertical direction crossing, and in longitudinal direction, it is located in the middle of load-bearing cable.By the present application, it solves the problem of unreasonable stress of foundation, low construction efficiency, prestress loss and other problems, realizes 30-40 meters large-span without support across, while reducing construction difficulty and influence on ecological environment.

The application discloses a kind of special-shaped large-span structure installation welding equipment, including support structure, welding structure and controller;Support structure includes installation component and support guide rail, support guide rail is erected between a pair of symmetrically arranged installation component on ground;Welding structure includes support plate two, support component, fuel supply equipment, hose, welding gun and multidirectional connection component;Support plate two is slidably mounted on support guide rail by support component, fuel supply equipment is fixedly installed on support plate two;Gas outlet end of fuel supply equipment is connected with welding gun by hose, welding gun is movably installed below support plate two by multidirectional connection component, so that the head of welding gun can be positioned to the welding position of special-shaped large-span structure;Controller is installed on one of installation component and is electrically connected with support structure and welding structure.The application relates to the technical field of welding equipment, and can solve the problem of needing to control the movement of large-span structure to adapt to the welding angle in the prior art.

The utility model relates to the field of building construction equipment, and specifically relates to a high-altitude large-span type steel support mould frame, including support frame, positioning plate, adjusting portion and section steel, the support frame is placed horizontally on the work ground, the positioning plate cross section is square, and the positioning plate is fixed centrally in the top of support frame through high -strength bolt, the adjusting portion includes the flat plate fixed centrally in the upper end surface of positioning plate, the upper end surface of flat plate is fixed and installed with the support rod symmetrically, the top of two support rods is fixedly installed with the top plate, the inside of top plate is centrally provided with the round hole, the hollow sleeve is rotatably installed in the round hole, the inside of hollow sleeve is installed with the threaded rod through screw thread cooperation, the bottom end surface of threaded rod is fixedly installed with the limit stop, and the both ends of limit stop are all socketed in the outer wall of two support rods, the top end surface of threaded rod is fixedly installed with the disc, and the disc is connected with the support plate through the swivel joint in the directly upper side, the utility model has the characteristics of height adjustable, high practicality.

This invention discloses a precise positioning construction method for the installation of main pier supports of long-span steel truss arch bridges, comprising the following steps: Step S1: Pouring the support pad stone and reserving a post-cast layer of a predetermined thickness; Step S2: Laying a temporary steel pad plate of a predetermined thickness on the support pad stone; Step S3: Setting up vertical and horizontal adjustment devices on the support pad stone; Step S4: Hoisting the support onto the temporary steel pad plate; Step S5: Adjusting the vertical elevation of the support using the vertical adjustment device, while simultaneously removing the temporary steel pad plate, leaving a gap between the support and the support pad stone; Step S6: Adjusting the horizontal position of the support using the horizontal adjustment device; Step S7: Connecting the support and the support pad stone together with anchor bolts, and then pouring the post-cast layer of the pad stone; Step S8: Lifting the steel beam joint and supporting the support onto the support pad stone, completing the support installation. This invention has advantages such as simple process, reliable quality, time saving, good economy, and good application prospects.

The application provides a structure and method for improving wind vibration performance of a large-span bridge, and relates to the technical field of bridge engineering. The structure comprises a stand, a railing, a main active air blowing and sucking structure, an incoming flow monitoring device and a power control device. The incoming flow monitoring device is used for monitoring the wind speed and direction of the incoming flow. The power control device can control the active air sucking of the air sucking port and the active air blowing of the air blowing port of the main active air blowing and sucking structure. The method comprises monitoring the wind speed and direction of the incoming flow or the vibration response of the main beam. When the monitored wind speed of the incoming flow reaches the vortex vibration or flutter wind speed, or the monitored vibration response of the main beam reaches the vortex vibration or shows a flutter trend, the power control device is used to make the air sucking port on the windward side of the railing actively suck air and the air blowing port on the leeward side of the railing actively blow air. The application can adjust whether the main active air blowing and sucking structure blows or sucks air in real time according to the wind speed and direction of the incoming flow or the response of the main beam, and can effectively improve the wind-induced vibration stability of the bridge.