57results about How to "Solve construction problems" patented technology

The invention discloses a fan blade gas heat deicing system which comprises a heater and an air blower which are installed in a blade, an air inlet of the heater is connected with an air outlet of the air blower, an air outlet of the heater is communicated with an air inlet of an air guide pipe, an air outlet of the air guide pipe points to the blade tip direction, and a hard air pipe is adopted at the front end of the air guide pipe. The rear end of the air guide pipe is provided with a soft air pipe, an air inlet of the hard air pipe is communicated with an air outlet of the heater, an air outlet of the hard air pipe is communicated with an air inlet of the soft air pipe, the soft air pipe is arranged in a blade front edge cavity, a plurality of air guide holes are formed in the position, facing the blade front edge, of the soft air pipe, and when no hot air exists, the air guide holes are communicated with the hard air pipe. And when hot air exists, the flexible air pipe is stretched to be close to the blade tip or the blocked position of the blade tip. The air guide pipe can extend to the blade tip, the deicing effect of the blade tip is enhanced, a new hot air backflow channel can be constructed in the blade blocked by the blade tip, and the air heat deicing effect is achieved.

The invention relates to a beam-first and arch-second construction method for a large-span through bolt-welding combined system steel box tied arch bridge, which comprises the following steps of: obtaining an under-bridge construction platform based on a preset bridge way system of the steel box tied arch bridge; on the basis of the under-bridge construction platform, sequentially completing suspended assembly of one straining beam, longitudinal and transverse beams and the other straining beam which are in bridge joint with piers at the two ends of the steel box tied-arch bridge, and after suspended assembly, completing fixed connection between the straining beams and the longitudinal and transverse beams in an auxiliary mode through the wedge-shaped lifting platform to obtain a spandrel girder structure; based on the bearing beam structure, laying of a temporary bridge deck system is completed, arch span structure construction is completed, and bridge deck system construction of the steel box tied-arch bridge is completed. According to the invention, the number of high-altitude supports is reduced, the cost of construction measures is saved, temporary construction measures are reduced, and the method has the advantages of improving the construction efficiency and reducing the cost.

The invention discloses a plane and vertical combination-based Tesla valve tidal river network hydrodynamic reconstruction method, which comprises the following steps of: 1, designing a main seawater upstream channel in a tidal river network into a Tesla valve structural form on the form of a river plane; secondly, in the vertical direction of the river channel, a Tesla valve-like structure is adopted, and a directional flow guide structure is arranged at the position close to a riverbed, so that when the water flow flows towards the ocean, the flow line is smooth, and when the water flow traces upwards from the ocean to the river channel, the water flow resistance is increased; structures similar to Tesla valves are installed at the inflow and upstream positions between the ocean and the river channel, movable assemblies such as gates are not used, salty tide upstream is effectively inhibited, meanwhile, water connectivity is not blocked, the influence on fish migration and ecosystem connectivity is small, and the method is suitable for large-scale popularization and application. High-concentration salt-containing water at the bottom is more effectively blocked, and one-way flow of water and pollutant discharge in a riverway of a tidal river network area are promoted.

The utility model relates to an assembly type composite floor slab. The assembly type composite floor slab comprises a shear wall tension brace combined formwork system, a multi-rod synchronous adjustment unit type independent supporting system, a post-cast strip wet connection hanging formwork system, a three-dimensional container type stacking frame, a height-adjustable composite floor slab and a composite floor slab overhanging I-steel local stiffness reinforcing and fixing system which are adopted for assembly type composite floor slab construction. By the adoption of a modular assembly mode, time and labor cost can be saved, engineering efficiency can be improved, construction is convenient and fast, the device has great significance in improving the construction period, reducing waste and promoting environment-friendly practice, and the device has wide application prospects.

The invention relates to the technical field of nuclear engineering building structure design, and discloses a floor integrated structure module and a construction method thereof. The reinforcing mesh structure comprises horizontal bars and tie bars, one ends of the tie bars are connected with the bottom plate structure, and the other ends of the tie bars are connected with the horizontal bars; the detachable truss structure comprises detachable truss units and truss connecting assemblies, and the truss connecting assemblies are suitable for connecting every two adjacent detachable truss units; the detachable truss unit comprises an upper chord component and a web component, the upper chord component is arranged on the side, away from the bottom plate structure, of the reinforcing mesh structure, one end of the web component in the first direction is connected with the upper chord component, and the other end of the web component is detachably connected with the first bottom plate and / or the second bottom plate. According to the floor integrated structure module, the construction problem of areas such as large-span floors, limited-space floors and scaffolding-supporting-difficult floors is solved, formwork-free and scaffolding-free supporting is achieved, and the construction efficiency and safety are improved.

The invention discloses an underground excavation supporting structure capable of freely expanding boundaries for a large-span underground cavern and a construction method, the overall design thought of the supporting structure is that a structural unit is formed by structural members such as a middle pile / column, each layer of beam, a large arch and each layer of structural plate, and the structural members are arranged in a set cavern boundary range. The underground cavern is formed by freely expanding a plurality of structural units in the transverse dimension, the longitudinal dimension and the vertical dimension. According to underground cavern scale requirements in different periods, boundaries can be expanded at any time, structural units can be increased, and the cavern scale can be expanded. The span of a single structural unit can be flexibly designed. During implementation of the supporting structure, temporary projects such as a working well, a main construction tunnel and auxiliary construction tunnels are arranged, the working well is arranged above the main construction tunnel or at one end of the side face of the main construction tunnel according to conditions such as site conditions and work planning organizations, and the auxiliary construction tunnels can be arranged on the single side or the two sides of the main construction tunnel. The temporary project can be combined with an auxiliary project to achieve permanent and temporary combination.

A drilling device for a mobile ground anchor comprises: a power source, a hydraulic control device, a power head connecting arm and a power head connected in sequence; the power head is connected to the ground anchor; the hydraulic control device is used to: drive the power head to output torque based on the energy provided by the power source to drill the ground anchor into the ground; the present invention can be widely used in the process of rigid rod ground anchor burying facilities, directly improving the safety and reliability of construction operations. It realizes hydraulically driven drilling of ground anchors, avoids manual screwing, and facilitates and quickly carries out transportation and transfer at the construction site, solving the construction difficulties of ground anchors in current wiring construction.

The invention provides a concrete prefabricated pipe gallery structure and a construction method of a concrete prefabricated pipe gallery. The concrete prefabricated pipe gallery structure comprises cushion blocks, a track set, a grouting part, sealant and a plurality of prefabricated pipe joints, and the prefabricated pipe joints are distributed in the longitudinal direction; a track group is fixed on the cushion block, the prefabricated pipe joints are arranged on the track group, and the track group is located at the joint of every two adjacent prefabricated pipe joints; the track set comprises a first track and a second track which are distributed in the longitudinal direction at intervals, the first track corresponds to one of the two adjacent prefabricated pipe joints, and the second track corresponds to the other one of the two adjacent prefabricated pipe joints. A track group interval is arranged between the first track and the second track; a grouting part is arranged between the cushion block and the prefabricated pipe joint; and the sealant is arranged between every two adjacent prefabricated pipe sections, and the technical problems that the assembling difficulty of a concrete prefabricated pipe gallery is large, and the overall sealing performance of the pipe gallery is difficult to guarantee are solved.

This utility model belongs to the technical field of reinforced concrete composite shear wall building structures in civil engineering, specifically relating to a bidirectional hollow slab composite shear wall with opening-narrowing stirrups. By setting opening-narrowing stirrups corresponding to the horizontal holes of the bidirectional hollow slab at the edge members at both ends of the shear wall, and by setting longitudinal reinforcement distributed within the wall and longitudinal reinforcement of the edge members at the corresponding positions of the vertical holes of the bidirectional hollow slab and the opening-narrowing stirrups, the structure not only meets design requirements and facilitates construction, but also, due to the special structure of the opening-narrowing stirrups, the constraint area of ​​the opening-narrowing stirrups on the core concrete can be adjusted by the angle formed by the longitudinal and horizontal sections. This allows the constraint effect of the opening-narrowing stirrups on the core concrete to gradually decrease towards the opening end, forming a vertical energy dissipation zone under large horizontal lateral displacement. This effectively controls the structural failure mode and energy dissipation method, achieving a unity of constructability, good economy, and seismic performance in the new composite shear wall structure.

The invention provides a heterogeneous ground support network deployment method for unmanned aerial vehicle autonomous inspection, which comprises the following steps: constructing a construction cost estimation model of an unmanned aerial vehicle ground support network based on three parts of ground nodes, antennas and transformation cost; based on the construction cost estimation model, according to two constraint conditions of unmanned aerial vehicle air-ground communication transmission time delay and ground network node deployment positions, a problem model is constructed for an unmanned aerial vehicle ground support network construction cost minimization target; and for the constructed problem model, a node search algorithm with the maximum cluster coverage rate is adopted to solve the problem, and the deployment design of the unmanned aerial vehicle autonomous inspection ground support network under the condition of a given unmanned aerial vehicle inspection task coverage area is realized. According to the method, the problems of construction and deployment of the unmanned aerial vehicle ground support network under the condition of a given inspection task coverage area can be solved, and automatic optimization of the deployment position of the network node is realized.

The invention discloses a TBM double-track tunnel trackless transportation cross-line bypassing cushion layer rapid construction method, and belongs to the technical field of tunnel construction. According to the method, a construction area is divided into a plurality of construction sections in the longitudinal direction of a tunnel, construction and transport vehicle framing and side alternate operation is organized, and parallel cushion layer pouring and trackless transport are achieved; the method comprises the following steps of: performing radar detection and scabbling treatment on the top surface of an inverted arch block during construction preparation; installing a steel plate water stop belt, and penetrating through the ground beam and the drainage blind pipe; a detachable steel pipe is adopted for shaping and constructing a cushion drainage ditch; after a reinforcing mesh is laid, concrete pouring, multi-pass surface finishing, steam and heat preservation curing and temperature and humidity monitoring are conducted; by optimizing the construction organization and technology, the problems that transportation is interrupted, the construction period is long and cracking is prone to occurring in a traditional method are solved, efficient, high-quality and low-interference cushion layer construction is achieved, optimal construction parameters can be scientifically screened by setting a contrast test section, and adaptability is high.

A kind of soft soil layer deep foundation pit underground comprehensive pipe gallery supporting structure, including subway line area (1), it is characterized in that: one side of the subway line area (1) periphery is left piling area (2), the other side of subway line area (1) periphery is right piling area (3), located left concrete pile (4) and located right concrete pile (4) between along the spanning direction of underground comprehensive pipe gallery is erected with arc protective arch (6), two rows of support piles (13) are vertically fixed on arc protective arch (6) or cambered surface connecting component (8) and are arranged, located the same side support pile (13) between is provided with pipe gallery continuous wall (16) by concrete pouring, the present application has reasonable structure, arc protective arch is used as protective main structure, the load of structure, backfill soil and construction machine above subway line area is shared to the piling area outside bottom subway line area, the safety of subway line is guaranteed to the greatest extent.

The utility model discloses a beam-column joint structure, the joint comprises a column section and a cantilever which are cast into a whole by reinforced concrete, the cantilever comprises a steel rib beam which is horizontally arranged inside, the steel rib beam is connected on column section steel or longitudinally arranged on a section steel section in the column section, and the steel rib beam is connected with the column section steel or longitudinally arranged on the section steel section in the column section. A gap is formed in the horizontal surface or the longitudinal surface of the steel rib beam and used for allowing stirrups of the column sections to penetrate through or additional ribs for fixing the stirrups to penetrate through. The beam-column joint adopts a prefabricated reinforced concrete structure or a prefabricated steel reinforced concrete structure, the cantilever adopts a steel reinforced concrete structure, and the end part of the steel rib beam in the cantilever is transversely provided with a gap for the stirrup to pass through or is longitudinally provided with a through hole for the additional rib to pass through, so that the additional rib is welded and fixed with the corresponding stirrup; therefore, the problem that the stirrup and the steel rib beam intersect and conflict is solved.

The invention provides a steel pipe column ring beam steel bar construction method, which comprises the following steps of: hoisting ring beam steel bars under the working condition of hoisting construction from top to bottom, pre-placing prefabricated ring beam steel bars at the top of a constructed steel pipe column under the working condition of not meeting the hoisting construction from top to bottom, and then, after a new steel pipe column is mounted, pre-placing the prefabricated ring beam steel bars at the top of the constructed steel pipe column. And the preset ring beam reinforcing steel bar is lifted to the mounting position, the problem that the prefabricated ring beam reinforcing steel bar cannot be hoisted from top to bottom is solved, meanwhile, field binding is not needed, and the problem that the construction period is greatly prolonged is avoided. According to the construction method, the construction convenience and the construction efficiency are remarkably improved, the requirement for the working face is lowered, the construction problem of the ring beam steel bars at the special structure is solved under the condition that construction facilities are not increased, all the ring beam steel bars are integrally installed under the special working condition, the construction operation is simplified, and the construction cost is reduced. And the mounting efficiency and the construction quality are improved.

The invention discloses a construction method of a deepwater large-span straining beam, which comprises the following steps of: firstly constructing a straining beam section in a cofferdam in a bearing platform cofferdam, synchronously prefabricating a middle straining beam cavity prefabricated section, and after a pier body is out of water, cutting off a conflict part between a steel pipe pile of the bearing platform cofferdam and the straining beam in the range of the straining beam; the straining beam cavity prefabricated section is integrally hoisted to the top of the cut cofferdam steel pipe pile, water is pumped in the cofferdam, closure section cast-in-place hanging brackets between the two ends of the straining beam cavity prefabricated section and the poured straining beam section in the cofferdam are installed, concrete of the straining beam closure section and a cavity in the straining beam cavity prefabricated section is poured, and after the concrete reaches the design strength, the straining beam cavity prefabricated section is cut off. And dismantling the closure section cast-in-place hanging bracket and the bearing platform cofferdam to obtain the deepwater large-span straining beam. The construction method is easy to operate and short in construction period, equipment and a large amount of material investment are reduced, and construction cost and risks are greatly reduced.

The invention discloses a muck screening and crushing box and a shield tunneling machine, belongs to the technical field of tunneling construction equipment, and aims to solve the problem that tunneling construction in a stratum containing large-particle muck needs to be stopped frequently. The muck screening and crushing box comprises an outer box body (59), and an inner cavity (591) and a roller screening device (56) are arranged in the outer box body (59); the inner cavity (591) is divided into an upper cavity (5911) and a lower cavity (5912) by a roller screening device (56), and a crushing device (57) is arranged in the upper cavity (5911). The muck screening and crushing box has screening and crushing functions, large-particle muck and small-particle muck can be screened out from muck, the large-particle muck can be crushed, and the large-particle muck which cannot be crushed can be discharged, so that the screening and crushing efficiency can be improved, the fault rate can be reduced, and the cost can be reduced. And the tunneling construction efficiency can also be improved.

The utility model relates to a construction device for a plastic fluid coating on the outer wall of a pipe bar, which belongs to the technical field of coating construction devices and comprises a coating component, the front end and the rear end of the coating component are opened so that the pipe bar to be coated with the coating can penetrate through the coating component, paint is pressed into the coating component, and the paint can be extruded to the surface of the pipe bar; clamping and positioning assemblies are arranged in front of and behind the coating assembly and are used for adjusting and guiding the pipes and the bars; a drying device and an environment-friendly device are further arranged behind the coating assembly. The utility model provides a construction approach of a plastic fluid coating, solves the construction problem of the plastic fluid coating on the outer wall of a pipe bar, is beneficial to improving the efficiency and the quality of coating construction, is an efficient and environment-friendly coating device, and provides a foundation for large-scale, high-quality and automatic construction of the plastic fluid coating on the outer wall of the pipe bar.

The present invention proposes a beam bridge without a central partition, without a hanging formwork, and without a negative bending moment tooth block, and a design method thereof. The beam bridge includes a prefabricated main beam, a wet joint, a lower structure, and a pier top crossbeam above the lower structure. The concrete bridge decks of adjacent prefabricated main beams are connected by a wet joint. The design method of the above beam bridge includes the following steps: S1, initial design of the main beam; S2, calculation of the non-uniform deflection of the main beam and the indirect transverse stress of the bridge deck; S3, calculation of the direct transverse stress of the bridge deck; S4, crack resistance verification of the bridge deck; S5, optimization of bridge parameters to reduce the stress on the driving surface; S6, completion of the beam bridge design. The beam bridge and its design method effectively solve the problem that the existing beam bridge without a central partition is prone to longitudinal cracking at the joints, and realizes the suspension tension without the wet joint hanging formwork of the bridge deck and the negative bending moment beam, and has better mechanical properties and better economic, environmental and social benefits, which can facilitate the promotion and application of such bridges in various types of highways, railways and municipal engineering.

The utility model discloses an assembly type container base structure, including stand and bottom ring beam, bottom ring beam is provided with two groups, the one side and one end of stand all are provided with two groups through -hole, two groups bottom ring beam near stand one side set up two groups of thread hole, four groups the inside of through -hole is equipped with the bolt of adaptation with thread hole, the both sides of through -hole near the one side and one end of stand are provided with the positioning strip, the utility model discloses through the intercoordination between stand, bottom ring beam, through -hole, thread hole and bolt, make with base frame disassembly into splicable unit module, complete anticorrosive treatment and pre -assembly debugging in factory, only need to splice module and tighten bolt on the spot, and single group base construction period can be shortened to 4-8 hours from traditional 3-5 days, change traditional on -the -spot welding node for standardization bolt connection spare, do not need to use electricity when assembling, solve the construction problem of the area without welding condition.

The application discloses a kind of super high-rise building pre-arch steel structure roof truss construction methods, belong to the construction technical field of eccentricity inclined super high-rise building. Including the following construction steps: S1, using the way of arc curve arch to design the arch of large-span truss, and according to the construction environment and working condition, the large-span truss is segmented to produce;S2, after the segmented production is completed, several trusses are pre-assembled, and the accuracy of the truss arch and important node is tested;S3, the structure form of support jig is designed, and is laid in the construction site, then the truss is hoisted and assembled;S4, the large-span truss formed by assembling multiple trusses is measured and corrected;S5, the post-welding point is reserved, and the roof truss top surface is covered with soil, and after the soil covering is completed, the truss is welded. The construction method is used to solve the construction difficulties of roof truss involved in eccentricity inclined super high-rise building.

The utility model relates to a supporting device, belongs to the technical field of building construction supporting, and particularly relates to a multipurpose hydraulic cantilever supporting device which comprises two cantilever supporting layers, I-shaped steel is arranged on the upper side of one cantilever supporting layer, and a first lifting lug is fixed to one end of the lower side of the I-shaped steel. According to the utility model, a plurality of groups of U-shaped anchor bolts, nuts and the like are used for mounting, the dismounting is convenient, meanwhile, materials can be repeatedly used, the green construction requirement is met, and the supporting system can be used for multiple parts of a building structure and can be combined and mounted according to specific construction conditions, so that the practical requirement on the supporting system under the same working condition is met; a stable and reliable supporting framework is formed by adjusting the length and the pressure of the hydraulic telescopic rod; the problems that in the prior art, design and construction of a formwork supporting system, design and construction of an operation platform supporting system and design and construction of a high-rise structure material transfer platform supporting system are not convenient are solved.

The utility model discloses an auxiliary device for hoisting construction under a cantilever plate, which relates to the technical field of hoisting construction equipment and comprises a first pulley, a second pulley and a third pulley, the connecting assembly is arranged on the main body structure below the cantilever plate; the supporting assembly comprises a diagonal draw bar, a main supporting rod and a second pulley, the first end of the diagonal draw bar is connected with the connecting assembly, the second end of the diagonal draw bar extends in the direction away from the main body structure and inclines downwards, one end of the main supporting rod is connected with the second end of the diagonal draw bar, and the other end of the main supporting rod extends in the direction of the main body structure; the second pulley is rotatably arranged at the joint of the diagonal draw bar and the main supporting rod; hoisting equipment is arranged at the top of the cantilever plate, the fixed end of the steel wire rope is connected with a winch of the hoisting equipment, and the free end of the steel wire rope sequentially winds around the first pulley and the second pulley and is connected with a hanging basket. The hanging basket can be conveniently hung on the outer surface of the main body structure below the cantilever plate for construction.

The invention belongs to the technical field of capping beam construction, and particularly discloses a large-span door type capping beam construction technology which is used for a capping beam with the span larger than 50 m and comprises the steps that a vertical foundation support is assembled on an existing structure; a support is erected on the periphery of the existing structure, a supporting mechanism is arranged at the bottom of the support and forms a stress face, and when the supporting mechanism is stressed to rotate, bending moment force generated by concentrated stress in the supporting mechanism is released; integrally hoisting the pre-assembled steel truss to a preset bent cap; and layered pouring is conducted on the steel truss hoisted to the preset bent cap, so that bent cap construction is completed. The vertical support is directly arranged on the existing structure, so that the reliable transmission of the load of the upper structure is realized; through the arrangement of the supporting mechanism, flexible adjustment of the elevation of the support is achieved, and the construction efficiency is remarkably improved; through the free rotation effect of the stress surface, the bending moment is prevented from being transmitted to the foundation, the stress performance of the support is effectively improved, and the overall design of the steel support is further optimized.

The present invention provides a low-headroom bored pile construction system and method using a flexible steel cage, which uses the main bars, stirrups, pile end concrete counterweights and top rigid steel cage of the flexible steel cage. The main bars of the flexible steel cage use unbonded prestressed steel strands, and stirrups are wound around the outside of the main bars of the flexible steel cage to form a flexible steel cage. The pile end concrete counterweight is arranged at the bottom of the flexible steel cage, and a prefabricated top rigid steel cage is connected to the top design elevation of the flexible steel cage pile. After the flexible steel cage is lowered to the design elevation, the hole is cleaned and concrete is poured in the pile hole. After the foundation pit is excavated to expose the pile top concrete, the main bars of the flexible steel cage are tensioned and locked with anchors, and the main bars of the top rigid steel cage are anchored into the basement floor steel bars. The present invention has high construction efficiency, short time consumption, and low labor and material costs, and can solve the problem of pile foundation construction under low headroom and limited space conditions.

The invention discloses a self-propelled steam spraying maintenance integrated tunnel secondary lining maintenance trolley which comprises a closed maintenance system, a support, a walking system and a spraying maintenance system. By arranging the closed curing system, when the closed curing system is used, the sealing performance of a curing space can be guaranteed, the space requirement for installation of the curing trolley in a tunnel is met, normal traffic in the tunnel is not affected, rapid alignment can be achieved during construction, and lining concrete curing is conducted in time; according to the steam system, on the premise that original functions are guaranteed, a plurality of construction problems are avoided, the construction applicability is improved, and concrete curing construction can be more conveniently and effectively carried out; by means of the spraying system at the tail of the trolley, the trolley can follow the secondary lining trolley to conduct steam curing on the finished secondary lining, meanwhile, the spraying system at the rear portion of the trolley conducts spraying curing on the secondary lining, subjected to steam curing, of the front plate, and the construction progress of the secondary lining is not affected while the curing time of the secondary lining is guaranteed.

This invention relates to the field of mine ecological restoration technology, and discloses a method and system for mine ecological restoration. The restoration method includes selecting an area with residual heat from underground coal fires on a mine slope where residual coal has spontaneously combusted as a restoration zone; reinforcing and stabilizing the slope of the restoration zone; laying a sludge substrate with a moisture content of 60%-80% on the stabilized slope surface, and using the residual heat from the underground coal fires for in-situ biological drying until the volume reduction reaches a preset threshold of 40%-60%; subsequently, covering the dried sludge substrate with a soil substrate layer and a soil microbial substrate layer to construct a composite growth matrix; and finally, maintaining vegetation on the slope. This invention cleverly combines the residual heat from abandoned mines with urban sludge treatment, achieving the harmlessness, reduction, and resource utilization of sludge, while simultaneously solving the problems of excessively high soil temperatures and difficulty in plant survival in mining areas, achieving the goal of ecological restoration through waste treatment and synergistic efficiency.

The utility model relates to the field of building construction, in particular to auxiliary hydraulic pile cutting equipment for an annular partition plate. The annular partition plate auxiliary hydraulic pile cutting equipment comprises a hydraulic pile cutting machine body, the hydraulic pile cutting machine body is arranged on the outer side of a pile foundation in a sleeving mode, the hydraulic pile cutting machine body comprises a plurality of bases, an oil cylinder, a drill rod, a positioning barrel, a connecting plate, an embedded plate and a connecting assembly, the bases are distributed on the outer side of the pile foundation at equal intervals, the oil cylinder is installed on one side of each base, and the drill rod is installed on the other side of each base. A drill rod is connected into the oil cylinder in a sliding mode and can stretch out and draw back under the action of the oil cylinder. According to the auxiliary hydraulic pile cutting equipment for the annular partition plate, rapid and stable connection between the bases can be achieved through the connecting assemblies, the connecting mode is easy and convenient to operate, connection adjustment between the bases is facilitated, connection is firm, and the construction problem caused by equipment looseness in the pile cutting process can be effectively solved.

The utility model provides an arc-shaped wall protection plate structure, and relates to the technical field of wall decoration, an arc-shaped wall protection plate comprises a first straight wall plate, a bent plate structure and a second straight wall plate, and one end of the first straight wall plate is provided with a first clamping groove; a first clamping groove is formed in one end of the bent plate structure, a second clamping groove is formed in one end of the bent plate structure, the first clamping groove and the second clamping groove are connected through a splicing piece, a third clamping groove is formed in the end, away from the second clamping groove, of the bent plate structure, and a fourth clamping groove is formed in one end of the second straight wall plate. The third clamping groove and the fourth clamping groove are connected through a splicing piece. The arc-shaped wall protection plate structure effectively achieves the effect of being tightly attached to the curve of the curved wall face, not only solves the construction problem of traditional arc-shaped wall face decoration, but also provides a technical paradigm for industrial installation of a complex curved surface space, and is a key innovation of the wall protection plate structure.

The utility model relates to the technical field of building construction, and discloses a large-span steel structure limited space low-position integral lifting support which comprises a support component, a lifting device and a plurality of embedded parts, the support component comprises a stand column, the stand column is arranged above an outer side original structural beam, and the lower end of the stand column is fixedly connected to the corresponding original structural beam through a first embedded part; the top end of the stand column is fixedly connected with a platform beam horizontally and forwards extending out of the original structural beam, an inclined strut is fixedly connected between the stand column and the platform beam, and the lifting device is installed at the foremost end of the platform beam; a rear pull rod is fixedly connected to the rear side face of the upper portion of the stand column and gradually inclines backwards and downwards, and the lower end of the rear pull rod is fixed to the original structural beam on the inner side through a second embedded part. The steel structure lifting device is stable in structure, is suitable for lifting a steel structure in a narrow space in the middle of a floor, can be detached and recycled, and provides guarantee for smooth large-span space steel structure and overall lifting.

This invention discloses an unsupported, rotatable, adjustable device for lightweight steel structure bridges and its construction method, comprising: a pier, cast into the outer side of the building structure; a construction platform, erected on the pier; a slewing bearing, installed on the pier; a support wall, erected above the building structure, one end of which extends above the construction platform; the support wall is arc-shaped and coaxial with the slewing bearing; a guide groove is formed on the inner arc surface of the support wall, the guide groove being arranged along the arc direction of the support wall; an adjustable-length connecting component, one end of which is connected to a slider sliding in the guide groove, the other end of which is hinged to the short arm end; the connecting component's length is adjusted to adjust the elevation of the long arm end; and a jacking mechanism installed on the support wall. This invention solves the problems of insufficient positioning for lifting machinery and inability to establish supports when constructing bridges over rivers, on the tops of residential buildings, or on various other structures.