85results about How to "Meet deformation requirements" patented technology

The invention discloses a medium-and-low speed magnetic levitation railway low route continuous arched supporting rail beam structure. The structure comprises a reinforced concrete bottom plate, a rail row, a plurality of rows of track rail supporting tables, a reinforced concrete top plate, flow guide rail brackets and a plurality of reinforced concrete arched posts, wherein a transponder mounting position is arranged between a left track rail supporting table and a right track rail supporting table in each row of track rail supporting tables; the flow guide rail brackets are arranged on the two sides of the reinforced concrete top plate; the reinforced concrete arched posts are arranged on the reinforced concrete bottom plate along the track line direction at equal intervals; the bottom of the reinforced concrete top plate is fixedly connected with the top of each reinforced concrete arched post; the rail row is arranged at the top of the reinforced concrete top plate through the track rail supporting tables; a transverse arch is arranged in each reinforced concrete arched post; a longitudinal arch is formed between every two adjacent reinforced concrete arched posts. The transverse drainage requirement on a low route at a dual-line road section is convenient to meet, and the difficulty on construction of a rail structure on the upper part can be reduced.

The invention discloses a super deep-draw fingerprint resistant electro-galvanized plate and a manufacturing method thereof. The super deep-draw fingerprint resistant electro-galvanized plate comprises the following chemical components in percentage by weight: less than or equal to 0.002 percent of C, less than or equal to 0.01 percent of Si, 0.06-0.12 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.009 percent of S, 0.065-0.085 percent of Ti, 0.02-0.05 percent of sol Al, less than or equal to 0.003 percent of N, and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of molten iron desulphurization, smelting in a converter, vacuum treatment, continuous casting, hot rolling, cold rolling, continuous annealing and reeling, wherein the heating temperature of the hot rolling is 1,000-1,200 DEG C, the temperature of the final rolling is 800-1,000 DEG C, five times of cold rolling is conducted after the continuous hot rolling, the reduction rate of the cold rolling is controlled to be 73-83%, the temperature of continuous annealing is 810-860 DEG C, the time of the continuous annealing is 15-80 s, and then the electrogalvanizing and fingerprint resisting treatment is conducted after leveling and withdrawal straightening. The electro-galvanized plate has excellent stamping processing and fingerprint resisting performance, and the manufacturing method of steel is simple in process flow and low in production cost.

The invention discloses a suspension type floating plate vibration isolation system, which comprises area floating plates, rubber vibration damping belts and a plurality of precast vibration isolation units, wherein the plurality of precast vibration isolation units are arranged on floor slabs or the ground, and are cast on site to form the area floating plates; the area floating plates are supported on the floor slabs or the ground by vibration isolators in the precast vibration isolation units and form gaps with the ground or floors to isolate vibration and noise; a plurality of area floating plates are arranged; and the rubber vibration damping belts are arranged among different area floating plates to limit the transmission of vibration in the horizontal direction. The suspension type floating plate vibration isolation system can isolate the vibration of machines from the floor slabs, is not needed to be jacked in the construction process and is easy to maintain and replace in the using process.

The prestressed rail beam suitable for use in high speed urban rail transportation includes top plate, bottom plate and web plate. It is featured by that several eccentric pretensioning type prestressed beams set in the right and left parts of the top plate and the bottom plate; several eccentric pretensioning type prestressed beams set in the middle part of the bottom plate; two quadratic parabolic first post tensioning type prestressed beams on two sides of the web separately; two quadratic parabolic second post tensinoing type prestressed beams on two sides of the web separately; and outside prestressed beams in cavity and top plate. Controlling the prestressed rail beam always in prestressed axle state for one deformation keeps within 1 mm.

The invention belongs to the technical field of tunnel engineering and particularly relates to a supporting and retaining structure of an existing retaining wall straight penetrated by a large-span tunnel and a construction method thereof. The supporting and retaining structure comprises two rows of anti-skid piles, a ground coupling beam, coupling beams, a top beam, inclined struts, an anchor stay cable structure and a grouting reinforcement body. The two rows of anti-skid piles are mounted on the outer side of the supporting and retaining structure. The front row of anti-skid piles are at a certain distance from the supporting and retaining structure and are connected with one another through the ground coupling beam. The rear row of anti-skid piles are tightly attached to the supporting and retaining structure and connected with one another through the top beam, the coupling beams and the ground coupling beam. The two rows of the anti-skid piles are connected through the ground coupling beam and the inclined struts to form an overall frame structure. The rear row of anti-skid piles are provided with opposite-pull anchor stay cables. Rock and soil masses on the stressed sides of the peripheries of the anti-skid piles are subjected to grouting reinforcement, and the bearing capacities of the rock and soil masses and the supporting and retaining structure are improved. The supporting and retaining structure is applicable to an entrance and an exit of the large-span tunnel and a tunnel entrance heading slop with the requirement of small deformation, the reinforcing effect is guaranteed, and traffic operation is not blocked.

The invention provides a roller type multi-section control section bar three-dimensional stretch-bending dieless forming device and belongs to the technical field of metal section bar stretch-bending forming. The device is mainly applied to part manufacture of three-dimensional bending and twisting composite deformation of metal section bars. Multiple rollers are used and the positions and angles of the normal sections on the space of three-dimensional bending and twisting formed parts of section bars are subjected to section control, so that linear section bars are bent and twisted according to a preset trajectory to finish composite forming. One roller controls the spatial position and angle of one normal section of one formed part. The device consists of such parts as a machine base, a plurality of universal angle-adjustable supports and a group of forming rollers. One universal angle-adjustable support is provided with and controls one roller, so that the spatial position and the axial direction thereof can meet the deformation requirements. The machine base and the universal angle-adjustable supports are common parts; the group of forming rollers can be applied to formed parts with different bending curvatures of sections bars with the same section.

The invention relates to an upper-and-down two-point type connecting joint of a steel structure and a polycarbonate (PC) outer wall. The PC outer wall is assembled vertically. A steel structure boundary beam is arranged on one side of the vertically-assembled PC outer wall. A first bracket is welded to one side of the steel structure boundary beam and located between the steel structure boundary beam and the PC outer wall. A connecting base is welded to the bracket and welded by a bearing plate and round steel, and the round steel is arranged vertically. A welding-stopping plate, a heel block, a positioning plate are inserted in the round steel in sequence from bottom to top, and the round steel is welded to the positioning plate. A pre-embedded part is pre-embedded at the lower part of the PC outer wall on the upper portion and welded to the positioning plate. A pre-embedded bolt is pre-embedded at the upper part of the PC outer wall on the lower portion. Connecting angle steel is correspondingly connected with the pre-embedded bolt and a second bracket. The second bracket is welded to one side of the steel structure boundary beam. According to the upper-and-down two-point type connecting joint of the steel structure and the PC outer wall, the firmness and safety of wall plate installing can be ensured, on-site installation construction errors can be adjusted as much as possible, and on-site actual construction requirements can be met.

The invention relates to a building expansion and retraction device, and provides an expansion and contraction device with an arch elastic connection function. The expansion and contraction device comprises two edge beams located on the two sides of an expansion joint and arranged oppositely, and further comprises a rubber strip which is clamped between the two edge beams and stretches across the expansion joint. At least one elastic connecting plate is further arranged below the rubber strip, the elastic connecting plates are sequentially arranged at intervals in the length direction parallel to the expansion joint and fixedly connected to the two edge beams through anchor bolts, and each elastic connecting plate stretches across the expansion joint and vertically supports the rubber strip. According to the expansion and retraction device, the rubber strip is adopted for waterproof sealing between the two edge beams, the elastic connecting plates located below the rubber strip are used for supporting the rubber strip, a certain reverse acting force can be provided for the rubber strip, the reliability of the rubber strip can be improved, and the rubber strip is not likely to disengage from the edge beams; besides, the elastic connecting plates can play a role similar to that of elastic connecting hinges, so that the left edge beam and the right edge beam bear force cooperatively, and the structural integrity of the expansion and retraction device is improved.

The invention discloses a double-layer vierendeel truss structure system of a large cantilever structure, comprising a floor frame. The floor frame comprises frame columns (1), frame beams (2) and cantilever beams (3). The double-layer vierendeel truss structure system of the large cantilever structure is characterized in that a plurality of main truss columns (4) are arranged between the upper and lower frame beams (2) of the floor, the upper and lower frame beams (2) of the floor are connected with the main truss columns (4) to form a first-layer vierendeel truss structure, a plurality of auxiliary truss columns (5) are arranged between the upper and lower cantilever beams (3) of the floor, the upper and lower cantilever beams (3) of the floor are connected with the auxiliary truss columns (5) to form a second-layer vierendeel truss structure, and the first-layer vierendeel truss structure and the second-layer vierendeel truss structure are connected to form the double-layer vierendeel truss structure system of the large cantilever structure. The double-layer vierendeel truss structure system of the large cantilever structure has a simple structure and is convenient to construct. A space frame structure system is formed by two layers of vierendeel trusses. The double-layer vierendeel truss structure system of the large cantilever structure can meet the structure stress and deformation requirement under the condition of adopting the small beams.

A PVC freezing pipe for shield tunneling freeze-consolidation is used in a freeze-consolidation area. A shield tunneling machine penetrates through the freeze-consolidation area along the axis. The PVC freezing pipe comprises a pipe body, wherein the pipe body is made of PVC, the bottom end of the pipe body is sealed by a PVC pipe choke plug, a flange assembly is arranged at the other end of the pipe body, the flange assembly comprises a steel flange plate on the outer side and a PVC flange plate on the inner side, the steel flange plate is connected with the PVC flange plate, a liquid inlet pipe passes through the flange assembly and then stretches into the pipe body, and a liquid outlet pipe is further arranged on the pipe body. The PVC freezing pipe for shield tunneling freeze-consolidation is simple in structure, convenient to operate, and capable of meeting engineering strength and deformation requirements in shield tunneling saline water freezing design. Meanwhile, the freezing pipe can be directly cut off during shield tunneling and does not need to be pulled out after freezing is achieved, and therefore safety of shield tunneling is improved.

The invention provides a three-point/four-point bending fatigue test method and device for a composite material. The device comprises an upper loading roller which is used for restraining the verticalupward normal deviation of a test piece in a loading direction, a lower supporting roller which is used for constraining the vertical downward normal deviation of the test piece in the loading direction, a transverse baffle which is used for restraining transverse deviation of the test piece in the length direction, a side baffle plate which is used for restraining the longitudinal deviation of the test piece along the width direction and fixing the upper loading roller and the lower supporting roller at the same time, a lower supporting base which is used for supporting the lower supportingroller, a lower supporting block which is arranged between the lower supporting base and the lower supporting roller, and is used for changing the distance between the lower supporting roller and theupper loading roller by changing the size of the lower supporting block, a lower bottom plate which is used for supporting the lower supporting base and the transverse baffle, and a displacement meterwhich is fixedly connected to the lower bottom plate. The bending deformation of the test piece is measured through the displacement meter.

The invention discloses a supporting process of portal frame type anchor pipe soil nail spraying net and a modified reinforcing cement mortar employed by the same, which can greatly change the compression resistance and the shearing resistance of soft cement soil. In the novel supporting process of the portal frame type anchor pipe soil nail spraying net, a vertical large-diameter anchor pipe soil nail is added on the basis of the existing supporting technique of the conventional soil nail spraying net, a new formula of a 'modified' curing admixture is adopted to perform cement mortar blowing, and when the cross section of a foundation pit has large changes, theoretical and experimental researches are performed on a failure mode and deformation characteristics of the cross section of the foundation pit. Simultaneously, the supporting process is combined with actual projects to prove that the new type foundation pit support form can be adopted to excavate a foundation pit with the depth of 4 to 6 meters in Wenzhou, so not only the technical problem that a conventional soil nail spraying net support cannot be adopted when the excavation depth of the foundation pit in an urban area of Wenzhou is more than 4 meters is solved, but also compared with other available supports, the supporting process is money-saving and time-saving, reduces risks, and has good economic and social benefits.

The invention provides a method for processing a soft soil foundation with an environment-friendly light pile. The method comprises the following steps: 1) preparing materials for the environment-friendly light pile; 2) preparing pile forming equipment for the environment-friendly light pile; 3) preparing a piling machine, and starting a vibration hammer for piling a guide hole pile pipe to a design depth; 4) upwardly pulling the guide hole pile pipe to guarantee that a movable bottom door pile tip is completely opened; 5) feeding a prepared environment-friendly light mixture to a feeding hole of the guide hole pile pipe for the first time; 6) starting an impact heavy hammer for continuously impacting the environment-friendly light mixture in the guide hole pile pipe for 2-6 times to form a dense expanded pile body; 7) feeding for the second time and tamping a pile top for 2-5 times by the impact heavy hammer; 8) continuously lifting the guide hole pile pipe until the distance from the bottom of the guide hole pile pipe to the ground is 30-50 cm, shifting the piling machine, filling up the pile top with soil and tamping or rolling the pile top; and 9) repeating the steps 3) to 8) until the reinforcement treatment of the soft soil foundation is finished. The method has the benefits as follows: the reinforcement effect is good, waste materials are turned into wealth, the cost is low, and the environment is protected.

The invention discloses a deformation joint structure for a light rail elevated station and a construction method thereof. The deformation joint structure is arranged between floor slabs arranged at two sides of a deformation joint, and comprises a water stop, a fireproof plate and multiple stainless steel plates, wherein the fireproof plate and the water stop are fixed to the floor slabs at the two sides through bolts which are arranged at intervals by pressing the stainless steel plates; the fireproof plate is formed by a fireproof upper plate, a fireproof lower plate and a fireproof material filled between the fireproof upper plate and the fireproof lower plate. According to the deformation joint structure for the light rail elevated station, disclosed by the invention, under the action of various deformation influence factors, not only is the requirement of expansion deformation of the deformation joint met, but also the requirements of fire prevention, heat preservation and water prevention of the deformation joint are considered; the deformation joint structure is simple in structure and construction technology, reliable in performance, convenient in construction and easy in overhauling and replacement, and can be widely applied to a large-area floor deformation joint in a public place which has higher requirement on fireproof performance and is always in larger temperature difference.

The invention discloses a rapid drainage and consolidation treatment method for soft soil foundations, which comprises the following steps: (1) digging the silt to 2-3m below the delivery elevation, and backfilling the first layer of sand to 0.8-3m below the delivery elevation while digging 1.2m, insert the plastic drainage board to a depth of 8m below the handover elevation, cover the second sand cushion to 0.5-1.5m above the handover elevation, set up a drainage system to pump water continuously; (2) start the first dynamic load after 12-18 days after the backfill is in place , the energy is 500-650 kJ, and the depth of the ramming pit does not exceed 1.5m; (3) The second dynamic load after 5-8 days, the energy is 700-900 kJ, and the depth of the ramming pit does not exceed 1.5m, (4) 5-8 Start the third dynamic load after 5-8 days, the energy is 1100-1500 kJ, and the depth of the ramming pit does not exceed 1.5m; m; (6) After 5-8 days, excavate excess filler, perform 600 kilojoule full-field dynamic load once, and level and hand over the work twice. The invention can reduce the cost by 75%, and shorten the construction period from more than 360 days to about 90 days.

The invention discloses a six-direction deflection comb plate retractor device. The six-direction deflection comb plate retractor device is characterized in that five-direction deflection support sets are fixedly arranged at the rear end of a movable comb plate, the bottom face of the front end of the movable comb plate is provided with sliding grooves and steel pins, and the five-direction deflection support sets are two elastic support bodies which are arranged on an anchor plate and both consist of teflon plate rubber bases, steel channels and teflon sliding plates; the steel channels are provided with axial sliding grooves, and the two steel channels are buckled on the anchor plate and welded with the anchor plate. Compared with the prior art, the six-direction deflection comb plate retractor device has the three-dimensional deformation functions of planar rotation, vertical rotation and transverse displacement, various deformation requirements during everyday operation can be met, and the requirement for longitudinal and transverse extremely-large displacement deformation generated by bridges during an earthquake can be met as well. The device is simple in structure, convenient to construct and mount, high in shock absorption capacity, low in noise and particularly suitable for high-grade highway bridges, viaduct bridges and extremely-long flexible bridges.

The invention discloses ultra-low carbon steel, and a preparation method and application thereof. The ultra-low carbon steel is prepared from the chemical components in percentage by mass: 0.001% to 0.002% of C, 0.03% to 0.05% of Mn, less than or equal to 0.005% of Si, less than or equal to 0.003% of Al, less than or equal to 0.010% of P, less than or equal to 0.005% of S, 0.01% to 0.05% of Zr, and the balance of Fe and unavoidable impurities. The ultra-low carbon steel has good tensile strength and elongation, the tensile strength is 260 to 280 MPa, and the elongation is 45% to 55%. The ultra-low carbon steel also has good conductance and the conductance is up to 16.5% to 17.5%.

The invention discloses a non-pillar mining roadway sidewall closing device and a construction method thereof; the non-pillar mining roadway sidewall closing device comprises a plurality of gangue retaining pillars arranged at intervals; an upper steel beam and a lower steel band are arranged at the upper and lower ends of the gangue retaining pillars respectively; a gangue retaining mesh is arranged on the sides of the gangue retaining pillars close to a gob; flexible cloth is arranged on the gangue retaining mesh; the upper end of the flexible cloth is fixed to a crossheading roof through the gangue retaining pillars and the upper steel beam; the lower end of the flexible cloth is fixed to a crossheading floor through the gangue retaining pillars and the lower steel band. The non-pillar mining roadway sidewall closing device is high in overall structural plasticity and meets the requirement on deformation of a roof; the existing gangue retaining mesh is used directly, the gangue retaining pillars are recyclable, and accordingly the cost is greatly reduced.

The invention discloses a launch canister based on a carbon fiber composite base material and a manufacturing method. The launch canister comprises a launch canister body, wherein the launch canisterbody comprises an ablation resistance preimpregnated layer, an ablation resistance layer, a first flame-retardant toughening layer and a second flame-retardant toughening layer which are arranged in sequence from inside to outside; and a guide plate is paved between the ablation resistance preimpregnated layer and the ablation resistance layer in the length direction of the launch canister body. The manufacturing method of the launch canister is simple, is easy to implement, has strong process operability, and fully utilizes different types of carbon fibers. By adopting the manufacturing method, even if the body of the launch canister is made of carbon fibers having the common strength, the body of the launch canister still has excellent mechanical properties, and the cost can be reduced.Compared with an existing metal multi-layer structure and other multi-layer structures made of mixed carbon fibers, glass fibers and the like, the launch canister based on the carbon fiber composite base material has the advantages that the weight of the launch canister based on the carbon fiber composite base material is reduced, and the launch canister based on the carbon fiber composite base material has good interface continuity and excellent mechanical properties, and meets the requirements for axial stiffness and stability.

The invention discloses an intelligent prefabricated beam pedestal. The intelligent prefabricated beam pedestal comprises two tracks, the two tracks are arranged in parallel, and arranged in the direction of the prefabricated beam construction process; a pedestal body comprises a first-stage supporting box, a second-stage supporting box and a three-stage supporting box, wherein the first-stage supporting box, the second-stage supporting box and the three-stage supporting box are fixedly arranged in sequence from bottom to top. The first-stage supporting box is slidably arranged on the two tracks, a plurality of cross beams are arranged in the first-stage supporting box and the second-stage supporting box at intervals in the length direction of the prefabricated beam, and the cross beams are arranged in the width direction of the prefabricated beam. The three-stage supporting box comprises a plurality of channel steel fixedly arranged at the top end of the three-stage supporting box atintervals in the width direction of the prefabricated beam and top surface steel plates horizontally arranged on the top surface of the multiple channel steel to support the prefabricated beam, and the channel steel is arranged in the length direction of the prefabricated beam. According to the intelligent prefabricated beam pedestal, the free movement in each area of the pedestal body is realizedthrough the sliding of the pedestal body on the tracks, the construction of the prefabricated beam in different positions and transport beam bodies are met, so that mechanical equipment is fully utilized, the site is saved, and the production efficiency is improved.

The invention discloses a telescopic steel frame joint suitable for large tunnel deformation. The joint consists of two parts, namely an upper part (100) and a lower part (200) which are coupled with each other; both the upper part (100) and the lower part (200) are provided with coupling heads connected with a steel frame, namely an upper coupling head (110) and a lower coupling head (210); the upper part (100) is provided with a convex body end (120), and barbed inverted teeth (130) are arranged on the outer surface of the convex body end; the lower part (200) is provided with a sheathing cavity (220) capable of being sheathed with the convex body end (120) of the upper part, and barbed reverse inverted teeth (230) are arranged on the inner surface of the sheathing cavity; a gap (240) is formed in the sheathing cavity (220); each of connecting steel plates (250) transversely spans the two sides of the gap and is connected with the sheathing cavity through a bolt. The telescopic steel frame joint disclosed by the invention is suitable for various forms of excavation methods and can be processed and mounted with the finished steel frame on site, the length of the steel frame is automatically adjusted according to the stress situations, the telescopic amount and the ultimate bearing capacity of the steel frame can also be manually set at the beginning, the telescopic amount can be locked during construction, and the stress of the steel frame and the deformation of surrounding rocks can be effectively controlled to ensure the safety and the stability of a tunnel structure.

The invention relates to a method for manufacturing buckling restrained braces. The method comprises following specific steps that: sleeves are vertically placed into an iron stand; the side, of each sleeve, welded to a lower sealing plate is downwardly arranged; the gap between each sleeve and the corresponding lower sealing plate is sealed with silica rubber, so that grout leakage can be prevented; grouting materials are poured into the sleeves in batch; and then the upper sealing plates are installed after the strength of the grouting materials meets requirements. By employing the method, the production efficiency of the buckling restrained braces is improved, the buckling restrained braces can be produced in batch; the production cost is greatly reduced; the supporting appearance is more beautiful; energy dissipating and damping effects can be achieved; the buckling restrained braces are convenient to disassemble and check; and a foundation of the further promotion and application of the buckling restrained braces is laid.