44 results about "Prestressed structure" patented technology

The invention relates to the technical field of building detection, and discloses a building retard-bonded prestress intelligent detection method based on the Internet of Things. The method comprises the steps of collecting and preprocessing real-time monitoring data of the retard-bonded prestressed structure through an Internet of Things platform, and filtering interference signals to improve data quality; classifying the preprocessed data according to a preset stress state interval, and extracting time-space domain features of each interval to generate a stress feature set; detecting the change frequency of the stress state interval, and starting a dynamic adjustment mechanism to mark an abnormal interval if the change frequency exceeds a threshold value; according to the matching degree of the historical damage mode of the structure and the current feature, a non-abnormal interval stress feature set is decomposed to generate a damage feature subset, multi-parameter collaborative correction is carried out in combination with the incidence relation of material mechanics and environmental action parameters, and finally the position of a potential damage source is reversely traced along a damage evolution path. And determining a maintenance priority and generating a maintenance instruction.

The utility model belongs to the technical field of prestressed anchorage devices, and particularly relates to a prestressed steel strand pulling device. According to the utility model, the pre-stressed steel strands are suspended and separated through the front-end moving frame, the middle supporting frame and the tail-end limiting disc which are sequentially arranged at intervals, so that the risk of winding and crossing phenomena of the pre-stressed steel strands in the strand pulling process can be reduced; meanwhile, the prestressed steel strand is driven to penetrate through the first rolling device and the second rolling device, and friction between the prestressed steel strand and the corrugated pipe is reduced. The device is high in adaptability and good in universality and adaptability, and can be widely applied to various prestressed structure projects such as bridges and aqueducts.

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.

This invention belongs to the field of underground engineering tunnel equipment technology, and discloses a prestressed structure for tunnel boring machine (TBM) segments, a tensioning device, and a tensioning method. The prestressed structure for TBM segments includes segments, steel pipes, double-ended studs, nuts, a first washer, a clamp, and a connector. The segments have receiving holes, the steel pipes are inserted into these holes, and the double-ended studs are inserted into the steel pipes, with both ends of the studs protruding from the ends of the steel pipes. The nuts include a first nut and a second nut; the first nut is screwed to the first end of the double-ended stud, and the second nut is screwed to the second end of the double-ended stud. The first washer is fitted onto the first end of the double-ended stud and is located between the first nut and the segments. The clamp is located between the inner wall of the first washer and the outer wall of the double-ended stud. The connector has a tubular structure, with internal threads on its inner wall, and is connected to the first end of the double-ended stud. The prestressed structure for TBM segments provided by this invention can effectively prevent deformation or loosening during the shield tail disengagement process.

The utility model discloses a prestressed steel strand tensioning device, which relates to the technical field of prestressed construction, and comprises a tensioning mechanism, the tensioning mechanism comprises a jack and a fixing pipe, one end of the fixing pipe is fixedly connected with one end of the jack, a motor drives a driving gear and a driven gear to rotate, so that a threaded rod rotates, and the tensioning mechanism is driven to rotate. The movable seat drives the positioning disc to move, the positioning disc pulls out the positioning pipe in the process of moving along the inner wall of the square pipe, the multiple steel strands are quickly and accurately positioned in the mode that the fixed disc, the positioning disc and the positioning pipe are combined, the straightness of the steel strands is guaranteed, the stress tensioning effect of the steel strands is improved, and the stress tensioning effect of the steel strands is improved. Meanwhile, in the tensioning process, the stress sensor monitors the tensioning stress borne by the steel strand in real time, the displacement sensor measures the elongation of the steel strand, precise control over the tensioning stress and the elongation of the prestressed steel strand is achieved, the tensioning precision is improved, and the quality and safety of a prestressed structure are guaranteed.

The utility model discloses a body outside prestress structure for reinforcing masonry structure house, including masonry mechanism and tightening mechanism, the masonry mechanism includes building block, multiple steel strand bundles transversely throughout the both ends of building block, tightening mechanism, the tightening mechanism includes multiple fixed line cover of the movable sleeve joint in multiple steel strand bundles both ends. In the utility model, after steel strand bundle transversely throughout building block, the fixed line cover is sleeved in the outside end part of steel strand bundle, passes through the rotation screw rod, drives two pressure blocks and inserts the inside of fixed line cover and moves back to, then the vertical embedding of axle is inserted in the stranding gap of steel strand bundle, and the radial compression of steel strand bundle line body is realized to pressure block simultaneously, and this double fixed structure effectively promotes the combination intensity of fixed line cover and steel strand bundle, can prevent both from separating in hydraulic tensioning operation, can also ensure the uniform transmission of load in the tensioning process, thereby guaranteeing the stable implementation of hydraulic system operation.

The application provides a prestressed structure hole pressure grouting density detection system and method. The signal excitation device is adopted to generate an impact elastic wave at an excitation point of the prestressed structure hole, and then the signal characteristics of the impact reflected wave at a symmetrical position relative to the monitored point are analyzed to determine the pressure grouting density of the monitored point in the prestressed structure hole. The application solves the problems of low detection efficiency and uncontrollable vibration source signal of the pressure grouting density detection device in the prior art, and has the technical effects of improving the detection efficiency of the pressure grouting density detection device and controlling the vibration source signal.

The invention discloses a prestressed energy storage rib, and relates to the technical field of prestressed structure engineering and building energy storage, in particular to a prestressed concrete beam, and a prestressed energy storage rib body is arranged in the prestressed concrete beam. When the prestressed energy storage rib is used, the prestressed energy storage rib body is composed of a high-strength hollow FRP rib and a battery unit packaged in the high-strength hollow FRP rib. The anchoring electrical integrated end is a core innovation, integrates a mechanical anchoring module, an electrical insulation module and a circuit interface module, disperses anchoring stress through a local reinforcing structure to protect an internal battery cell, realizes electrical isolation by using an insulation isolation sleeve, and ensures reliable connection of a tensioned circuit by using a connecting piece with elastic compensation. The invention further provides a construction method of tensioning and anchoring first and then electrical connection, integration of a building structure and energy storage is achieved, and safe and reliable self-energy-storage capacity is given to major infrastructures.

The invention discloses a weldable metal ceramic composite pipe and a preparation process thereof, and relates to the technical field of pipelines, the weldable metal ceramic composite pipe comprises a steel pipe main body, the pipe wall of the steel pipe main body is axially provided with a through seam, and the seam is formed by welding after cutting; the ceramic lining layers are coaxially arranged in the steel pipe body, and each ceramic lining layer is of a cylindrical structure formed by splicing a plurality of ceramic pieces through a daub layer in an adhesive mode; the flat steel is welded to the outer pipe wall of the steel pipe body and covers the joint in the axial direction; and the hoop is arranged between the two steel pipe main bodies, and the hoop is welded to the outer pipe walls of the two steel pipe main bodies correspondingly. According to the invention, the impact resistance and thermal shock resistance of the ceramic lining are obviously improved through the design of the prestressed structure, and the problem that a traditional ceramic layer is easy to crack and peel off is effectively solved; and meanwhile, field direct fusion welding connection of the composite pipe is achieved, tedious flange installation is replaced, and the construction efficiency and the connection reliability are greatly improved.

The application provides a fan tower structure optimization method based on finite element analysis, and belongs to the technical field of structure optimization; steps include: step 1: obtaining the design requirements of the target fan tower, and establishing a three-dimensional finite element model of the target fan tower; step 2: performing linear stress analysis on the three-dimensional finite element model by using a finite element software, and identifying the area prone to fatigue; step 3: adjusting the prestressed structure parameters of the three-dimensional finite element model, and iteratively optimizing until the area prone to fatigue reaches the fatigue resistance and safety targets, and generating a first model; step 4: using a fatigue analysis method, predicting the performance of the first model during a preset service life to obtain a prediction result; and step 5: according to the prediction result, performing counter-optimization on the first model, adjusting the model parameters of the first model to generate an optimal model. The tower structure is optimized, the tower strength is improved, and the cost is reduced.

The invention relates to the technical field of prestressed concrete, and discloses a U-shaped prestressed concrete sheet pile anti-scouring wall structure which comprises a prefabricated sheet pile, a protruding block is arranged on the outer wall of the prefabricated sheet pile, a square groove is formed in the outer wall of the prefabricated sheet pile, a circular groove is formed in the inner wall of the protruding block, an inserting rod is connected to the inner wall of the square groove in a sleeved mode, and a U-shaped groove is formed in the outer wall of the inserting rod. The U-shaped prestressed concrete sheet pile anti-scouring wall structure comprises a prefabricated sheet pile, a butt joint groove is formed in the inner wall of the prefabricated sheet pile, a screw hole is formed in the inner wall of the prefabricated sheet pile, a triangular supporting frame is in lap joint with the inner wall of the prefabricated sheet pile, and a triangular filling groove is formed in the inner wall of the triangular supporting frame. By arranging the prefabricated plate piles, the triangular supporting frames, the metal plates, the metal blocks and other structures, connectivity and triangular supporting prestress are also generated between the two prefabricated plate piles, then the inner sides and the outer sides of the prefabricated plate piles are in linkage at the same time, the triangular prestress structure is added, and the prestress effect is added to the inner side and the outer side of the device.

The invention discloses an active supporting structure for a shallow-buried tunnel portal pipe shed, relates to the field of tunnels, and aims to improve the rigidity and stability of the supporting structure through active stress of the pipe shed. According to the technical scheme, the active supporting structure for the shallow-buried tunnel portal pipe shed comprises a guide wall at the portal, a supporting pipe is inserted into the guide wall, the front end of the supporting pipe is inserted into a soil body on the inner side of the guide wall, and the rear end of the supporting pipe is located on the outer side of the guide wall; at least one connecting hole is formed between the earth surface above the supporting pipe and the supporting pipe, an anchoring plate is arranged at the opening position of the connecting hole, a tie bar is arranged in the connecting hole, the upper end of the tie bar is connected to the anchoring plate, and the lower end of the tie bar is connected with the supporting pipe. The tie bars apply upward force to the supporting pipes before the tunnel portal is excavated, namely, the tie bars are of a prestressed structure and can offset part of soil mass load, deformation and sedimentation of the soil mass after the tunnel portal is excavated are reduced, and the risk that a primary support occupies a permanent structural plane is reduced.

The invention discloses an unloading method suitable for locally dismantling a prestressed structure. The method comprises the following steps: determining the arrangement position of a steel support system through structural simulation calculation, constructing a temporary support stress system by using a steel pipe column, a steel beam and a hydraulic jack, reasonably connecting and reinforcing, and installing a monitoring dial indicator; mounting and debugging a support system, and putting into use after ensuring no abnormity through a load test; then, pre-stress grading symmetric unloading is conducted, 20% of pre-stress is unloaded in five grades, structural deformation and supporting stress are monitored in real time, and the structure is dismantled synchronously; after dismantling is completed, permanent structure newly-built reinforcement construction is conducted; and after the strength of the newly-built reinforced structure reaches the standard, the jack hydraulic device unloads step by step, the beam bottom deformation quantity is observed through the dial indicator, finally, the temporary steel supporting system is dismantled, and conversion from a stress system to a permanent structure is achieved. The method fully utilizes and retains the bearing capacity of the structure, exerts the advantages of the steel member, realizes construction controllability and safety monitoring, reduces the manufacturing cost, and shortens the construction period.

The utility model relates to a clamping type anchorage device suitable for CFRP stranded wires or rib materials, and belongs to the technical field of bridge engineering, and the clamping type anchorage device comprises a steel sleeve, a clamping piece, an aluminum sleeve and a bolt. Wherein the steel sleeve is an inner conical cylinder with an invariable outer diameter and a reduced inner diameter; one end of each clamping piece is separated, and the other end of each clamping piece is complete; one end of the aluminum sleeve is separated, and the other end of the aluminum sleeve is complete; the bolt is in threaded connection with the outer side of the steel sleeve. The inner surface of the steel sleeve, the clamping pieces and the inner and outer surfaces of the aluminum sleeve are specially treated. Compared with a common clamping type anchorage device, the anchorage device has the advantages that the pressure stress on the surface of the CFRP stranded wire or rib material is reduced, the friction force between the stranded wire or rib material and the aluminum sleeve is increased, and larger drawing force is provided; the anchorage device is convenient to install and can be used for cables or prestressed structures.

The application relates to the wind power technology field and discloses a lattice tower and a wind power generation device. The lattice tower comprises a plurality of pile bodies and a plurality of web members. The plurality of pile bodies are arranged around a preset direction, one end of the plurality of pile bodies is connected to a base, and the other end of the plurality of pile bodies is arranged away from the base. The pile body comprises a plurality of sub-piles which are sequentially spliced together, the sub-pile comprises a hollow pipe body, a concrete structure which is located in the pipe body and attached to the inner wall of the pipe body, and the pile body further comprises a prestressed structure which sequentially penetrates through the plurality of sub-piles. Each web member is connected between two adjacent pile bodies. The lattice tower and the wind power generation device provided by the application can be beneficial to saving production costs and improving production efficiency.

The invention discloses an effective prestress calibration method and monitoring device for a high-speed rail continuous beam bridge, and belongs to the technical field of civil engineering structure health monitoring. The method aims to solve the problem that long-term and real-time monitoring cannot be carried out on the effective prestress of the prestressed structure in the service period in the prior art. According to the method, through dual calibration combining finite element analysis and field tensioning, a high-precision conversion relation from working anchor strain to effective prestress is established, and real-time calculation is carried out through the relation in the service period. The monitoring device comprises a sensing unit and a data processing unit. According to the invention, full-period, real-time and accurate monitoring of the effective pre-stress state is realized.

The invention relates to the technical field of aqueduct construction, and discloses an aqueduct U-shaped groove body cast-in-place construction method based on a self-propelled groove building machine and the self-propelled groove building machine. The technical problems that in the prior art, when a conventional bridge moving formwork is used for construction of a large-span U-shaped thin-shell aqueduct, the structural adaptability is poor, the construction stability is insufficient, precision control is difficult under the complex working condition, and the construction organization for connection with a landing section is low in efficiency are solved. The method comprises the following steps: S1, equipment assembly and anti-overturning reinforcement; s2, pre-pressing and positioning a template structure; s3, steel bars and a prestressed structure are installed; s4, an internal mold anti-floating structure is in place; s5, concrete pouring and curing; s6, prestress tensioning and grouting are conducted; s7, equipment demolding and longitudinal movement hole passing are carried out; and S8, mold closing and circulating construction are conducted. According to the self-propelled aqueduct building machine, the lower hanging beam capable of being transversely opened and closed and the foldable hydraulic inner mold structure are arranged, so that the mold plate can accurately adapt to the complex hyperboloid contour and the ultra-large width of a U-shaped aqueduct, and the structure adaptation problem of a common scale frame is solved.

A pre-stressed structure and a method for forming a pre-stressed structure are provided. The pre-stressed structure comprises a panel including a first region pre-stressed into a condition of membrane tension, resulting in the panel having increased transverse stiffness. The pre-stressed structure may further comprise a second region pre-stressed into a condition of membrane compression. The panel may be a plate or a shell and may form part of an insulating glass unit, which in turn may form part of a curtainwall unit.

The present invention relates to the technical field of bridge rotation construction, and in particular to a temporary cable-stayed saddle device for a tower top capable of rapidly unloading prestressed structures. The device comprises a limiting seat, symmetrically arranged cable saddles within the limiting seat, and slidingly arranged along the length direction of the limiting seat. A tensioning structure is provided through the lower portions of the two saddles, and a temporary tensioning structure is provided on the upper portions of the opposite and distant ends of the two saddles. A limiting structure is provided between the limiting seat and the two saddles. The tensioning structure comprises tensioning bolts provided through the lower portions of the two saddles, and the temporary tensioning structure comprises a temporary stay cable provided through the upper portions of the opposite and distant ends of the two saddles. The present invention facilitates the rapid unloading of the temporary stay cable, improves construction efficiency and safety, and reduces construction costs. It overcomes the shortcomings of existing temporary stay cable saddles, which have the characteristics of large overhead work load, slow unloading speed, and high construction cost.

This invention discloses a tie-beam actively controlled variable cross-section double-row pile support structure and construction method suitable for backfill slopes. The structure includes a front row of piles, a rear row of piles, and at least two tie beams connecting the front and rear rows of piles. Both the front and rear rows of piles are arranged at intervals along the slope direction. This invention achieves a fundamental shift from traditional passive to active force-bearing in double-row pile support structures by employing prestressed tension beams. Traditional support structures only passively resist lateral pressure after slope deformation, while this invention actively applies prestress to the front and rear rows of piles by pre-tensioning the prestressed tendons within the tie beams, adjusting the structural stress state in advance and effectively suppressing lateral slope deformation and backfill settlement. Compared to anchor cables, tie beams, as rigid connection components, have stronger load-bearing capacity and superior deformation resistance, significantly reducing the risk of backfill settlement and ensuring long-term stability of the support structure, fully meeting the safety requirements for permanent support of backfill slopes.

A novel double-hole limiting type prefabricated track slab ballastless track structure for track traffic is composed of steel rails, elastic fasteners, prefabricated track slabs, limiting piles, an isolating layer, a filling layer, a base and the like, and the prefabricated track slabs are of a prestressed structure and a non-prestressed structure. A hole penetrating through the thickness direction of the track plate can be reserved in the prefabricated track plate so as to pour a filling layer material and observe the pouring state, and a special hoisting sleeve for pre-burying hoisting is installed; therefore, the fast line laying device can meet the requirement for laying of city fast lines with the speed grade of 160-200 km / m, has the advantages of being safe and reliable in quality, high in construction efficiency, little in environmental pollution, convenient and fast to maintain in the later period, good in economical efficiency and the like, meets the requirements for environmental protection, cost reduction, efficiency improvement and disease reduction of current rail transit, and achieves high-quality development of the rail transit.

The present application relates to prestressed concrete cylinder pipe technical field, disclose a kind of PCCP pipe structure and production method, including from inside to outside concrete inner layer, steel cylinder body, first mortar protective layer, concrete outer layer, second mortar protective layer and coating;First prestressed structure, including a plurality of first prestressed members, a plurality of the first prestressed members are arranged on the concrete outer layer along the axial direction, and located in the second mortar protective layer;Second prestressed structure, including a plurality of second prestressed members, a plurality of the second prestressed members are distributed on the steel cylinder body along the axial direction, and extend into the concrete inner layer;The first prestressed member and the second prestressed member cooperatively form the prestressed force of the steel cylinder body. The present application solves the problem that the overall stress distribution of the pipe body is greatly affected by the broken wire under the overall arrangement of the prestressed steel wire, and the pipe body is prone to cracks due to excessive prestress during winding.

Provided is a wind turbine tower structure optimization method based on finite element analysis, including: acquiring design requirements of a target wind turbine tower, and establishing a three-dimensional finite element model of the target wind turbine tower; identifying fatigue-prone areas by performing linear stress analysis on the three-dimensional finite element model through finite element software; generating a first model by adjusting prestressed structural parameters of the three-dimensional finite element model and performing iterative optimization until the fatigue-prone areas meet targets of fatigue resistance and safety; using a fatigue analysis method to predict performance of the first model during a preset service life to obtain a prediction result; and performing inverse optimization on the first model according to the prediction result and adjusting model parameters of the first model to generate an optimal model. The tower structure is optimized, the tower strength is improved, and the cost is reduced.

The invention discloses a spatial structure reduced scale model fire test device, and relates to the technical field of building structure fire prevention. The device comprises a foundation, a lower enclosure structure, a space structure, an upper enclosure structure and a fire source device. The lower enclosure structure is installed on a foundation, and the space structure is erected on the upper portion of the lower enclosure structure and comprises rod pieces, cable systems and a supporting system which are connected through nodes. The upper enclosure structure is laid above the space structure; and the fire source device is arranged in the internal space above the foundation. According to the invention, a large-space building fire scene can be truly simulated, the mechanical response rule and temperature field distribution of the space structure at high temperature can be accurately reproduced, and the problem of lack of overall structure fire test means in the prior art is solved. The device is reasonable in structure, can be reused by replacing different space structure models, and provides a reliable test platform for fire resistance research and safety design of a large-span prestressed structure.

The invention discloses a releasing construction method suitable for a super-long external prestressed steel beam, relates to the technical field of external prestressed steel beam construction of bridge engineering, and aims to solve the problems that the external exposed length of an anchoring end of the super-long external prestressed steel beam is insufficient, conventional equipment cannot release the super-long external prestressed steel beam to a stress-free state, and the construction efficiency is low. And safety accidents and structural damage are easily caused by traditional force cutting. According to the method, through a two-stage releasing strategy, in the first stage, supporting feet with different heights and a special jack are used for releasing and lengthening a steel strand in two steps at the BT2 end, and in the second stage, a modified single-hole anchor and a chain block are combined at the BT1 end to achieve stress-free releasing; the tool adopts a light and portable chain block, a special connector and a modified single-hole anchor suite, and is convenient to operate and high in safety. The device can completely release the steel strand to a stress-free state, avoids the risk of cutting with force, is suitable for external prestressing structures such as bridges, stay cables, arch bridges and suspension bridge tie bars, and is high in work efficiency and wide in application range.

This utility model belongs to the field of membrane structure construction technology, specifically relating to a highly efficient wind-resistant prestressed membrane structure. It includes a connecting structure, fixed membrane supports, sliding membrane supports, and a main membrane. The fixed and sliding membrane supports are respectively connected to a connecting structure. A double-hole slide rail is fixedly connected above the fixed membrane support. Two parallel sliding square tubes are variably connected above the sliding membrane support, and a single-hole slide rail is fixedly connected above each sliding square tube. The fixed and sliding membrane supports are alternately arranged, with a main membrane positioned between adjacent fixed and sliding membrane supports. The main membrane includes a main membrane fabric and side ropes connected to both sides of the main membrane fabric. One side rope of the main membrane fabric is connected to a first slide rail of the double-hole slide rail, and the other side rope is connected to a second slide rail of the single-hole slide rail. This utility model improves the wind resistance of the structure by employing prestressed technology.

The invention discloses ultrahigh-fluidity grouting material as well as a preparation method and application thereof, and belongs to the technical field of building materials. The grouting material is prepared from the following raw materials: 40 to 60 parts of Portland cement, 20 to 30 parts of superfine mineral powder, 5 to 8 parts of nano sol, 1 to 3 parts of sodium modified layered silicate clay or synthetic hectorite and 0.5 to 1.2 parts of polycarboxylate superplasticizer, the water-binder ratio is 0.18. The preparation method of the ultrahigh-fluidity grouting material comprises the following steps: uniformly mixing all powdery materials to obtain premixed dry powder; adding water into the nano sol for dispersion to prepare a mixing solution containing the nano sol; and uniformly stirring the premixed dry powder and the mixing liquid containing the nano sol to obtain the ultrahigh-fluidity grouting material. The invention also discloses an application of the ultrahigh-fluidity grouting material in post-tensioned prestressed structure duct grouting. According to the invention, an inorganic synergistic system of nano sol-high CEC layered silicate clay is creatively constructed, the contradiction between the flowability and the stability of the traditional grouting material is solved, and excellent performance under an ultralow water-binder ratio is realized.

The utility model discloses a spring aircraft code with a pressure applying prestress structure, which comprises semi-tempered laminated glass, an aluminum alloy glass auxiliary frame is arranged at the top end of the semi-tempered laminated glass, a prestress component is mounted at the top end of the inner wall of the aluminum alloy glass auxiliary frame, and an aluminum alloy glass pressing block is arranged at the bottom end of the prestress component. First machine-made screws are in threaded connection with the top ends of the aluminum alloy glass auxiliary frames, steel stand columns are fixedly installed on the aluminum alloy glass auxiliary frames through the first machine-made screws, aluminum alloy stand columns are arranged on the outer sides of the steel stand columns, and a plurality of aluminum alloy corner connectors are in threaded connection with the surfaces of the aluminum alloy stand columns. According to the spring airplane code of the pressure applying prestress structure, the prestress assembly is arranged, and the airplane code of a professional spring and a carbon structural steel plate is used, so that the airplane code is in a prestress state for a long time and is not prone to falling off and loosening, and the safety performance of a curtain wall is improved; and the use requirements of people are met.

The invention discloses a pre-stress structure in a miniaturized prefabricated assembly of a wind power tower and a construction method, the structure comprises an extended concrete foundation and a tower drum, and the tower drum is fixedly connected with a reinforced concrete section, a conversion section and a steel section from bottom to top; a prestressed duct is arranged in the concrete foundation, an annular groove is formed in the upper surface of the concrete foundation, and grouting materials are poured into the concrete foundation, the reinforced concrete section is a conical barrel, is provided with a regular hexagon longitudinal protrusion and a through channel and is formed by small prefabricated parts in a staggered-joint masonry mode and formed by epoxy mortar bonding, and the conversion section is provided with a round prestressed duct. The prestressed cable penetrates through the hole channels of all the parts to form a whole-body type internal prestressed structure. According to the structure, the transportation and hoisting cost is greatly reduced, cracking is doubly avoided, the assembly precision is effectively controlled, external prestress potential safety hazards are eliminated, light weight, high bearing performance and smooth mechanical transmission are both considered, construction can be simplified, the material consumption can be reduced, and the structure has technical feasibility and economic practicability.

The utility model discloses a prestressed structure and a prestressed building, and relates to the technical field of constructional engineering. The utility model aims to solve the problems that when a traditional prestressed structure is applied between a core tube and an outer frame beam, differential deformation occurs, additional internal force superposition generated by tensioning force of a prestressed rib can increase the tensile stress of the bottom of a floor slab connected with the outer frame beam and the torque of the outer frame beam, and the bearing capacity of the prestressed structure is reduced. The prestressed structure comprises a prestressed structure main body and prestressed tendons. The prestressed structure body extends in the first direction and is provided with a first end and a second end which are oppositely arranged. The prestressed tendon is arranged in the prestressed structure body from the first end to the second end and comprises a first straight line section, a first curve section, a second curve section and a second straight line section which are sequentially connected. At least the first linear segment is fixedly connected with the prestressed structure body close to the first end, and at least the second linear segment is fixedly connected with the prestressed structure body close to the second end. The prestressed structure is used for the prestressed building.