1403 results about "Steel columns" patented technology

The invention relates to the technical field of construction methods, in particular to a large-angle inclined steel column self-balancing construction method based on BIM. Comprising the following steps that a database containing steel column parameters, environment parameters and construction parameters is built through a BIM model, and the temperature change value, the instantaneous wind speed, the steel column real-time stress and the hoisting section weight in the construction process are collected in real time; based on the database and the real-time collected data, a torque deviation calculation model under the temperature and wind power coupling effect is established, and the dynamic adjustment amount of the lifting point is deduced according to a deviation value output by the model; calculating a real-time counterweight compensation amount in combination with the lifting point adjustment amount and a stress accumulation effect of previous construction; and according to the balance weight compensation amount, the hoisting posture of the steel column is dynamically regulated and controlled, self-balance control in the construction process is achieved, and the problem that a traditional static method cannot adapt to dynamic stress changes can be solved.

The invention discloses a stepping type climbing spraying robot and a spraying method thereof.The spraying robot comprises a feeding mechanism, a monitoring system, a control system, a horizontal moving mechanism and a vertical moving mechanism, two shells are connected into a whole through an opening and closing locking mechanism, and multiple sets of stepping type climbing mechanisms are arranged on the inner sides of the shells in the circumferential direction; the two semicircular plates are installed on the upper side of the shell, the horizontal moving mechanism is installed on the upper sides of the semicircular plates, the vertical moving mechanism is installed on the horizontal moving mechanism, the high-pressure spray head is installed on the vertical moving mechanism, and the spraying end of the high-pressure spray head is arranged relative to the outer surface of a steel column. According to the design, automatic stepping type climbing can be achieved through the stepping type climbing mechanism, and meanwhile the high-pressure spray head can freely move in a preset area through the horizontal moving mechanism and the vertical moving mechanism; in this way, the whole outer surface of the round steel column can be sequentially sprayed by controlling horizontal arc-shaped movement and vertical up-down movement of the high-pressure spray head, the spraying efficiency is high, and safety is good.

According to the diffusion type six-degree-of-freedom pose estimation-based steel column bottom plate prizing-free downward insertion method, the performability problem of one-time prizing-free downward insertion of a steel column bottom plate under the condition that a porous array is in a limited space and disturbed is solved, a task window is established under a unified construction coordinate system, and bolt axes and hole centers are collected and registered according to array topology; predictive interference is eliminated through diffusion type six-degree-of-freedom pose estimation with insertion constraint preposed, an allowable insertion pose range tightened along with the height is generated according to clearance and safety margin, and a downward insertion channel and an insertion constraint set are constructed in a communicating mode; tubular model predictive control is established in a feasible region, bounded disturbance of wind disturbance and swing is considered, a nominal trajectory and a segmented speed limit value of a channel center are formed, input shaping swing suppression and online monitoring are implemented, and withdrawing and rapid regeneration control are performed along a channel when necessary; the method is used for installation of simultaneous sleeving of multiple holes in the steel column bottom plate, and has the beneficial effects that the minimum clearance is kept not lower than the safety margin, lateral contact and prying are avoided, and the forbidden area is not touched under the limited space and disturbance.

This invention relates to the field of soft soil pile foundation engineering technology, specifically to a photovoltaic pile foundation with FRP-steel honeycomb web and a construction method for solidifying a soft soil bearing layer. The pile foundation includes an FRP-steel honeycomb web photovoltaic pile foundation and a solidified soft soil bearing layer. The bottom of the FRP-steel honeycomb web photovoltaic pile foundation is located in the solidified soft soil bearing layer, and its top is located above the ground. The FRP-steel honeycomb web photovoltaic pile foundation includes a core mold, concrete, and a fiber-wound layer. The core mold includes a cross-shaped steel column and an FRP sleeve. Through holes are provided on the web of the cross-shaped steel column and on the two straight plates of the FRP sleeve. The FRP sleeve is fixed between two adjacent webs of the cross-shaped steel column. The number and position of the through holes on each straight plate of the FRP sleeve correspond to the number of through holes on the web of the corresponding cross-shaped steel column. Concrete is poured inside the FRP sleeve, and the fiber-wound layer is located on the outside of the core mold. This invention reduces the weight and cost of the photovoltaic pile foundation and improves its durability and stability in soft soil areas.

The invention discloses a temporary structure suitable for an assembly type station ending end, which comprises a temporary support structure arranged in a shape like a Chinese character'tian ', the temporary support structure is divided into a foundation support frame provided with an outer ring and a cross-shaped inner support frame body arranged between the foundation support frames, and the temporary structure further comprises an underpinning system arranged in the temporary support structure; through the construction method and structure of firstly building temporary steel beam columns and firstly supporting and then underpinning, the assembly starting point and end point positions of the full-prefabricated rectangular flat-top assembly type station are suitable for the working condition, the method can solve the problem of space and time conflict between the assembly trolley and the temporary steel stand columns, it is ensured that the assembly trolley is normally put into use, and the construction efficiency is improved. Meanwhile, the mounting and dismounting workload of the temporary section steel beam column is reduced, the construction efficiency is improved on the premise of ensuring the splicing quality, the high-place operation risk is reduced, meanwhile, normal construction of a post-pouring beam column system can be ensured, and the mounting and dismounting amount of large section steel components is reduced.

The invention provides a structure and method for reducing the steel consumption of a single-stand-column photovoltaic support steel column, and belongs to the technical field of photovoltaic support design. The structure comprises a cast-in-place pile, a steel column, an inclined strut, an inclined beam, a purline and a photovoltaic assembly; the steel column comprises a lower stand column and an upper stand column arranged above the lower stand column, and the installation position of the steel column is arranged outside the center of the photovoltaic module in a bias mode and coincides with the vertical projection of at least one row of purlines. Through the offset design, the bending moment of the column bottom is reduced by 20%-50%, the stability of the steel column is improved, and the deformation risk is reduced; after the column bottom bending moment is reduced, the section of the steel column can be optimized and reduced, and the steel consumption is reduced by 20-30%, so that the material cost is reduced; meanwhile, after the column bottom bending moment is reduced, the pile foundation bearing requirement is lowered, the size or depth of the cast-in-place pile can be reduced, the use amount of concrete is reduced, and therefore the construction cost is saved by 15%-25%.

A section steel column base connection construction joint comprises a prefabricated foundation structure and a post-pouring fixing structure, and the prefabricated foundation structure comprises a concrete foundation, foundation bolts, positioning plates, positioning nuts and column bases; the post-pouring fixing structure comprises a connecting column, a bottom plate fixedly connected with the connecting column, a fastening nut used for fixing the bottom plate to the positioning plate, a steel column, a connecting bolt used for fixing the column foot, the steel column and the connecting column, and secondary concrete poured on the concrete foundation. The lower portions of the foundation bolts are embedded in the concrete foundation, the upper portions of the foundation bolts extend out of the concrete foundation and are provided with positioning plates in a limited mode through positioning nuts, the bottom plate and the positioning plates are fixed through fastening nuts after being overlapped, the lower portions of the column feet are embedded in the concrete foundation, the upper portions of the column feet are connected with steel columns in an inserted mode, and the side walls of the peripheries of the steel columns are inserted into the spaces between the column feet and the connecting columns. The technical problem that in the prior art, a steel column is directly connected with a foundation bolt, and the foundation bolt is prone to bending and not easy to align is solved.

The invention discloses a supporting end, a supporting device and a foundation pit supporting construction method, and belongs to the technical field of foundation pit construction.The supporting end comprises a mounting base, a connecting assembly, a wedge-shaped plate and a plurality of supporting pieces, one side of the wedge-shaped plate in the thickness direction is a plane, and the other side of the wedge-shaped plate is an inclined plane; the included angle between the inclined face and the plane is strictly matched with the inclined angle of the foundation pit wall face, meanwhile, the plane of the wedge-shaped plate is attached to the connecting plate, the connecting plate is stably connected with the mounting base arranged on the outer surface of the output shaft in a sleeving mode through the multiple locking pieces, and the supporting pieces made of elastic materials are evenly distributed on the inclined face of the wedge-shaped plate. The driving mechanism can drive the mounting base to drive the multiple supporting pieces to abut against the wall face of the foundation pit. The supporting device comprises a supporting steel column, two driving mechanisms and two supporting ends, and the two supporting ends are correspondingly installed on output shafts of the two driving mechanisms. The foundation pit supporting construction method adopts the supporting device. The method is simple in construction, high in supporting stability and high in economic value.

The application relates to the technical field of shaped steel column, in particular to a shaped steel column structure capable of shock isolation, which comprises a column body assembly, a shock isolation assembly and a connecting assembly; the column body assembly comprises a cross plate and four groups of connecting plates connected to the cross plate, the top of the cross plate is provided with a cross groove, the bottom of the cross plate is provided with a cross mounting groove, the connecting assembly capable of being arranged in the cross groove and the cross mounting groove is arranged in the cross groove, the shock isolation assembly is arranged at the bottom of the cross plate, the shock isolation assembly comprises a protection box and a mounting plate, X-direction sliding buffer pieces and Y-direction sliding buffer pieces are arranged in the protection box; the X-direction sliding buffer pieces and the Y-direction sliding buffer pieces are matched in the application and can move within a certain range, the influence of external vibration on the shaped steel column as a whole is reduced, the influence of passive stress of the building system is reduced, and the adjacent column body assemblies can be stably spliced.

The invention provides a splicing type steel-concrete composite structure. The splicing type steel-concrete composite structure comprises at least two beam sections and a splicing joint. The splicing joint is provided with a steel column and a first steel beam, the steel column is connected with the first steel beam in a welded mode, a widened flange plate is arranged on a first steel beam upper flange of the first steel beam, and a haunching plate is arranged on a first steel beam lower flange of the first steel beam. In the splicing joint area, the widened flange plates are arranged on the upper flanges of the steel beams, the haunching plates are arranged on the lower flanges of the steel beams, the flanges or webs of the whole steel beams do not need to be thickened, the bearing capacity of the steel beams can be effectively improved, and the overall earthquake load cannot be increased.

The invention provides a super-large steel column insertion construction positioning method, and belongs to the technical field of airport constructions.The method includes the steps that three-dimensional laser scanning is conducted on a super-large steel column to obtain an initial geometrical shape, a multi-field coupling finite element model is established to calculate a comprehensive deformation predicted value, and a reverse compensation function is used for determining the hoisting pre-bias amount; a hoisting path optimization game model is adopted to determine hoisting speed control parameters and measurement section arrangement spacing, real-time three-dimensional coordinate acquisition is performed on each measurement section positioning reference point in the hoisting process, spatial position deviation calculation is performed on a segmented actual measurement coordinate set and a design coordinate set, and hoisting equipment is dynamically adjusted; and when all measurement sections meet the positioning precision threshold value and the angle precision threshold value, steel column fixing and welding are completed, and the technical problem that multi-field coupling deformation is difficult to accurately predict and compensate in real time in the hoisting and positioning process of the ultra-large steel column is solved.

The utility model relates to the technical field of fire welding devices, and discloses a steel beam and steel column butt welding spark device which comprises two steel columns, a steel beam is arranged at the top ends of the two steel columns, and the steel columns and the steel beam are connected through two symmetrically-arranged connecting steel plates. The connecting steel plate is connected with the steel column and the steel beam through a plurality of fixing bolts which are inserted in a penetrating mode, fire receiving buckets are arranged at the bottoms of the connecting positions of the steel beam and the connecting steel plate, and spark receiving auxiliary assemblies are arranged at the top ends of the fire receiving buckets. The fire receiving bucket is arranged at the bottom of the welding position of the steel column and the steel beam, the fire receiving auxiliary assembly and the lifting hook are arranged on the fire receiving bucket, the lifting hook is welded to the welding operation bottom, and compared with a traditional fire receiving pan, the whole device is firmer and more durable, attractive in appearance, low in loss, environmentally friendly, safe, reliable and capable of saving labor. The device is suitable for large-scale popularization and application, low in manufacturing cost and high in economic benefit.

The application relates to a fabricated steel-bamboo mixed frame friction energy dissipation node and a construction method thereof, and belongs to the technical field of structural engineering. The fabricated steel-bamboo mixed frame friction energy dissipation node comprises an H-shaped steel column and an engineering bamboo beam. The energy dissipation node further comprises unequal limb connecting angle steel, an outer energy dissipation plate, a U-shaped energy dissipation piece and a friction type energy dissipation inclined brace. The application is improved on the basis of the traditional plug-in plate bolt node and the node disclosed in the above patent. Through the setting of the friction type energy dissipation plate piece and the inclined brace, the node can have strong energy dissipation capacity and good ductility, delay the splitting damage of the engineering bamboo material, and simultaneously enable the frame structure to have effective lateral stiffness.

The invention relates to the technical field of building construction, and provides a special-shaped bent and twisted steel column high-altitude in-situ assembly construction method which comprises the following steps: mounting a root steel column on a foundation steel column; first supporting jig frames are installed on the two sides of the root steel column, and the first supporting jig frames are fixed to the root steel column; a branch steel column is installed on each of the two sides above the root steel column, each branch steel column is fixed to the corresponding first supporting jig frame, and the lower surface of the outer wall of the top end of each branch steel column is connected with the top end of the corresponding first supporting jig frame in a matched mode; second supporting jig frames are installed on the outer sides of the first supporting jig frames, and the second supporting jig frames are fixed to the corresponding first supporting jig frames; a bent steel column is correspondingly installed at the top end of each branch steel column, and the top end of each second supporting jig frame is connected with the lower surface of the outer wall of the bent part of the corresponding bent steel column in a matched mode; and the cross beam steel column is mounted between the two bent and twisted steel columns. The problems of structural deformation, stress concentration and the like can be effectively avoided, and construction efficiency and construction safety are guaranteed.

The utility model relates to the field of steel structures, in particular to a novel assembly type steel-concrete structure which comprises a steel column and a steel beam, the steel column and the steel beam are both H-shaped steel, first stiffened plates are welded to the two ends of the steel column, a plurality of first main ribs are arranged between the two first stiffened plates in a penetrating mode, and at least one main bracket is arranged between the two first stiffened plates. One end of the flange of the main bracket is embedded between the flanges of the two steel columns, the first main reinforcement penetrates through the flange embedded section of the main bracket, first concrete pouring cavities are formed between the flanges of the main bracket and the stiffened plates, the web of the main bracket extends out of the first concrete pouring cavities, mounting holes are formed in the extending parts of the web of the main bracket, and second stiffened plates are welded to the two ends of the steel beam. A plurality of second main ribs are arranged between the two second stiffened plates in a penetrating mode, a second concrete pouring cavity is formed between the two stiffened plates, and a matching hole is formed in the end of a web of the steel beam, and the main bracket and the steel beam are rigidly connected through a bolt penetrating through the mounting hole and the matching hole.

This invention provides a welding method that allows the robot arm to move in an approaching manner so that the welding tool of the robot arm can reach the abutting portion at the midpoint in the depth direction of the two adjacent sides of the front of one side of the steel column, even for large steel columns, while avoiding a decrease in work efficiency due to frequent approaching movements. [Solution] This welding method uses a support structure 1 to support the robot arm 2. The robot arm 2 is used to weld the butt joint portion 31 between the lower square steel column 3A and the upper square steel column 3B. In the basic position, welding is not performed in areas that the robot arm 2 cannot reach (specific welding locations F), and welding is performed by the robot arm 2 in the weldable area G (thick dotted line area) for a number of passes less than the required number. Then, after removing the erection piece 32, welding is performed on the entire structure.

The utility model discloses a transportation and installation system for pipeline arrangement in a building, the transportation and installation system comprises a crane, a door-shaped steel frame and a roller transportation structure, the door-shaped steel frame is fixed at the upper part of a concrete structural column of the building, and the roller transportation structure is installed at the upper end of the door-shaped steel frame. The door-shaped steel frame comprises two groups of steel columns, a steel frame cross beam and an inclined support, two ends of the steel frame cross beam are respectively connected with the top ends of the two groups of steel columns to form the door-shaped steel frame, the inclined support is obliquely fixed between the steel columns and the steel frame cross beam, and the steel frame cross beam is connected with the steel columns through the inclined support to form a triangular stable structure. The door-shaped steel frame is fixed on the concrete stand column of the building structure, so that the pipeline load on the door-shaped steel frame is directly transmitted to the concrete stand column from the door-shaped steel frame, the problem that the bearing capacity of a roof is insufficient is solved, horizontal pipeline transportation can be achieved through the idler wheel transportation device, and pipeline transportation efficiency is improved.

This invention discloses a solid waste cemented board sound barrier and its preparation method. The solid waste cemented board sound barrier material is prepared from industrial solid wastes such as phosphogypsum, steel slag powder, and fly ash as the main raw materials, realizing the resource utilization of solid waste, significantly reducing raw material costs, and being environmentally friendly and low-carbon. The board production process has low energy consumption, simple and controllable technology, and is easy to mechanize for continuous production. The resulting material has high strength and stable performance, and is lightweight, fireproof, and corrosion-resistant. It does not crack or discolor under extreme climates, and its key indicators meet the requirements of highway sound barrier specifications. Based on its excellent strength, the solid waste cemented board sound barrier board prepared by this invention can be made into 4-5 meter long boards, suitable for installation with H-shaped steel columns spaced 4-5 meters apart. Compared with the traditional 2-meter boards, it can reduce the amount of column and foundation engineering, significantly reduce the overall cost, and has significant economic benefits and broad application prospects.

The utility model discloses an angle adjusting auxiliary frame structure of a unit curtain wall, which relates to the technical field of building curtain walls and comprises a delicate steel upright post, a delicate steel cross beam, an aluminum alloy base, an aluminum alloy pressing block, an aluminum alloy hook, a glass auxiliary frame, a glass panel and a steel supporting plate, the refined steel stand column is fixedly connected with the refined steel cross beam, the aluminum alloy base is arranged at the front end of the refined steel stand column, the aluminum alloy pressing block is located on the outer side of the aluminum alloy base, and the two aluminum alloy hooks are located on the two sides of the aluminum alloy pressing block respectively. According to the scheme, the glass auxiliary frame and the aluminum alloy hook are rotationally matched through the opening structure and the rotating ball head, the angle of the glass panel can be flexibly adjusted within a certain range through the design, the angle of the glass panel can be conveniently adjusted according to different building design requirements and lighting requirements in the actual installation and use process, and the glass panel is convenient to install and use. And diversified use scenes are met.

The invention discloses a hanging structure of an open type ceramic plate curtain wall, which relates to the technical field of ceramic plate curtain walls, and comprises a steel upright post, a steel cross beam, an aluminum alloy base, an aluminum alloy adapter, an aluminum alloy hanging piece and a vertical ceramic plate, the steel cross beam is fixedly connected with the front end of the steel stand column which is fixedly installed on a building body. According to the scheme, the aluminum alloy hanging piece is provided with the two-way hanging strips matched with the hanging grooves in the upper ends and the lower ends of the vertical ceramic plates, the vertical ceramic plates which are adjacent up and down can be fixed through one hanging piece at the same time, and the use number of the steel cross beams is reduced; installation can be completed only by inserting the two-way hanging strips and the vertical ceramic plates in a construction site, the installation process is simplified, and the installation efficiency is improved. In addition, the hanging grooves are formed in the ends of the vertical ceramic plates in advance, installation process holes do not need to be additionally formed, the defects of cracking, edge breakage and the like caused by stress concentration are overcome, and the material rejection rate is reduced.

This invention relates to the field of steel structure building construction technology, and in particular to a method for installing a circular arc beam in a circular tower steel structure. The method includes: creating a matching arc-shaped template based on the measured arc contour of the steel column on site; machining the ends of the beam to form a uniformly fitting arc surface; installing the steel column in sections; installing an adjustable ear plate assembly using the pre-reserved connection holes in the steel column and adjusting it to the installation height; hoisting the beam onto the assembly; finely adjusting its three-dimensional posture to ensure precise alignment of the fitting surfaces before locking it in place; welding the beam to the steel column; and finally removing the adjustable ear plate assembly. The purpose of this invention is to solve the problems of low beam fitting accuracy, difficulty in hoisting and positioning adjustment, damage to the steel column base material, and poor welding quality caused by deviations between the actual contour of the steel column and the design.

The vertical shaft derrick plastic energy dissipation protection beam structure disclosed by the application comprises a plastic energy dissipation component, a support component is fixed to the upper side of the plastic energy dissipation component through a plurality of bolts, a soft steel energy dissipation support is fixed to the two sides of the support component, the other sides of the two soft steel energy dissipation supports are fixed to steel columns, a plurality of buffer supports are further arranged, the buffer supports are fixed to the lower side of a steel beam, the steel beam is arranged above the support component, and the buffer supports correspond to the support component. The energy dissipation protection beam has the advantages of simple structure, convenient installation, wide application in the technical field of impact resistance protection in civil engineering and mechanical engineering, effective absorption and dissipation of impact energy, cooperation of multiple dissipation components and protection components, greatly improved energy dissipation capacity of the protection component, easy installation and replacement of the plastic energy dissipation components, low cost, and high protection efficiency.

The utility model discloses a steel column type radiator welding structure which comprises a welding table, a clamping assembly is arranged on the welding table, a supporting frame is arranged on one side of the welding table, a rotating shaft is arranged on the supporting frame, a rotating frame is arranged on the rotating shaft, an adjusting groove is formed in the rotating frame, and an adjusting screw rod is rotationally arranged on the adjusting groove. An adjusting block is arranged on the adjusting screw rod in a threaded connection mode, an adjusting air cylinder is arranged on the adjusting block, a welding gun is arranged on the adjusting air cylinder, the positions of the adjusting block and the adjusting air cylinder are adjusted, the height and the position of the welding gun are adjusted in cooperation with the adjusting air cylinder, and the welding gun is made to be aligned with the welding position of the heat dissipation plate and the steel pipe; and the rotating shaft and the rotating frame are driven to rotate, then the welding gun is driven to rotate, and uniform and stable welding can be conveniently conducted on the connecting circumference of the steel pipe and the heat dissipation plate.

This invention relates to the field of building construction technology, and in particular to a method and formwork for fabricating and shaping a reinforcing cage for a large-section steel column outer ring beam. The method includes a column unit, a base at the bottom of the column unit, a sleeve unit on the column unit, and a spreader beam unit on the sleeve unit. This invention simulates the center of a steel column by combining and stacking the column bodies, and uses the cooperation of movable columns and sockets to accurately position the reinforcing bars, reducing geometric dimensional errors in the reinforcing cage. This results in a reinforcing cage with a regular shape and uniform rigidity after being tied on the formwork. With the help of temporary internal support rods, hoisting deformation can be effectively controlled, ensuring the geometric stability of the reinforcing cage after installation.

The invention relates to the technical field of steel structure engineering construction, in particular to a super-long independent steel column segmented locking type temporary stabilizing device and a construction method thereof, and is suitable for the overall lifting stage of a multi-layer aerial corridor. The device comprises a first locking assembly surrounding a concrete column and providing an X-direction lateral fulcrum; the second locking assembly is fixedly connected to the surface of the steel column to form a force transmission interface; and the connecting conversion assembly connects the steel column and the concrete column into a whole, so that the X-direction load of the steel column is transmitted to the concrete column in sections. The super-long steel columns are temporarily decomposed into short column stress sections with the length not larger than the designed length, and lateral displacement is remarkably restrained. The construction method comprises the steps that the device is installed at the corridor joint, pre-tightening force is synchronously applied, displacement is monitored in real time, overall dismantling is conducted after lifting is completed, and no residue exists after dismantling. The method is not pre-buried and fully recycled, super-long columns are restored to be in a short column stress state, lateral displacement is reduced, steel is saved, the construction period is shortened, green construction and appearance completeness are both considered, and the method is suitable for a large-span corridor overall lifting project.

The utility model discloses a turnover embracing column support for accurate positioning and installation of a large-span orthogonal steel truss, which comprises a steel column, an annular steel column hoop is connected with the steel column through high-strength bolts, a triangular steel platform is welded with the annular steel column hoop, steel column brackets are arranged on two sides of the steel column, and the triangular steel platform is connected with the annular steel column hoop through high-strength bolts. The steel column bracket is used for being welded with a large-span orthogonal truss steel beam; steel column hoops are arranged on supports on the two sides of a large-span steel structure, a tripod steel platform is hinged to steel columns, and the tripod steel platform serves as a supporting point of the large-span steel truss and serves as a horse stool for welding a vertical component bracket and the large-span steel truss, so that a welder is helped to keep a welding piece at the correct position and angle, and the welding efficiency is improved. In the welding process of the large-span steel truss, the split heads can prevent a welding piece from displacing due to the influence of gravity or welding heat in the welding process, meanwhile, uniform supporting force can be provided, thermal deformation in the welding process can be reduced, the original shape and size of a steel structure can be kept, and therefore the welding precision and quality are guaranteed.

The application discloses a type steel beam shear wall system which is easy to process, assemble, decorate and bear stress, and relates to the technical field of building engineering, and comprises the following steps: hollow type steel beam framework, which comprises at least three type steel columns arranged at intervals along the same horizontal direction and a plurality of inter-column plates arranged at intervals along the radial direction of the type steel columns; and plain concrete, which covers the hollow type steel beam framework, wherein the thickness of the plain concrete on the outer side of the framework is 20-50 mm; and the two ends of the type steel column respectively extend out of the outer part of the plain concrete to form anchoring sections. The application solves the problems of the existing building engineering, such as poor stress system, non-dense sleeve grouting at the connecting part, insufficient node stress and seismic performance, the need of fireproof paint in the steel-concrete composite structure system, long construction period, high cost and difficulty in decoration.

The utility model discloses a split type rotating shaft cutting machine, relates to the field of metal cutting machines, and aims to solve the problems that the table board of the existing cutting machine is generally shorter, and the cutting length is longer. The utility model relates to a steel column cutting machine, in particular to a steel column cutting machine which solves the problems that when a steel column is used, due to the fact that the center of gravity of the steel column is not properly placed, even if a clamp is used for fixing, the head of the steel column is prone to warping under cutting vibration due to the unstable center of gravity, and is characterized in that a connecting block is fixedly arranged at one end of a table top of a cutting machine body; the conveying groove body is flush with the table top of the cutting machine body, the telescopic supporting frames are fixedly arranged at the two ends of the conveying groove body in the length direction, on one hand, it can be effectively prevented that during cutting, the gravity center of a workpiece is unstable, and the head upwarps, so that the cutting quality is affected, and on the other hand, the levelness of the long-strip-shaped workpiece can be effectively adjusted by adjusting the heights of the supporting frames at the two ends; the effect of selecting the cutting angle according to actual needs is achieved.

The utility model discloses a two-truss support structure suitable for supporting a large-span clean flue, and relates to the technical field of flue gas purification. The device comprises a flue support arranged at the bottom of a clean flue, the left end of the clean flue is connected with an absorption tower, and the right end of the clean flue is connected with a chimney; the flue bracket comprises a first bracket and a second bracket; the first bracket comprises a first bracket steel column and a second bracket steel column which are arranged at an interval; the second support comprises a third support steel column, a fourth support steel column, a fifth support steel column and a sixth support steel column which are arranged at intervals. In order to overcome the defects of large occupied area, high cost, long construction period and the like due to the adoption of a multi-span concrete or steel structure bracket in the conventional design of a large-span and high-clearance clean flue bracket in a desulfurization system, the utility model provides a two-truss bracket structure for supporting a clean flue of a desulfurization system. The device has the advantages of small occupied area, good economical efficiency and convenience in construction.