31results about How to "Avoid tying" patented technology

The invention discloses an assembly structure of a prefabricated concrete beam and a concrete-filled steel tube column. The assembly structure comprises the concrete-filled steel tube column, a concrete-filled steel tube bracket, the prefabricated concrete beam, beam end pre-buried steel and a connection plate, wherein the concrete-filled steel tube bracket is welded with a side part of the concrete-filled steel tube column; the concrete-filled steel tube bracket is step-shaped; the concrete-filled steel tube bracket comprises bracket-shaped steel and bracket concrete filled in the bracket-shaped steel; a plurality of opposite-pull bolt holes are formed in the side surface of the bracket-shaped steel; the prefabricated concrete beam comprises the beam end pre-buried steel and prefabricated reinforced concrete; the beam end pre-buried steel is step-shaped and is matched with the shape of the concrete-filled steel tube bracket; a plurality of opposite-pull bolt holes are also formed in the side surface of the beam end pre-buried steel; the connection plate is arranged on the side surface of the bracket-shaped steel and the beam end pre-buried steel and is locked and fastened by a plurality of opposite-pull bolts. The assembly structure of the prefabricated concrete beam and the concrete-filled steel tube column is high in bearing capacity, high in earthquake-resistant ductility, high in node energy dissipation capacity, convenient to construct and high in construction quality, and can provide effective restraint on the concrete.

The invention discloses a novel assembly type primary and secondary beam connecting node and a connection method thereof. The node comprises a primary beam and secondary beams. Two sides of the primary beam are both equipped with secondary beam support tables. The positions where the primary beam is located in the middle positions of the secondary beam support tables are equipped with pre-embeddedbolts. Interiors of the secondary beams are equipped with reserved bolt holes. Positions of the reserved bolt holes match those of the pre-embedded bolts. Back sides of the reserved bolt holes are equipped with fastening nuts. Tops of the secondary beams are equipped with fixed openings. Heights and widths of the secondary beam support tables are the same as the secondary beams. The secondary beam support tables and the pre-embedded bolts are symmetrically arranged. The invention relates to the technical field of assembly type construction. With the novel assembly type primary and secondary beam connecting node and the connection method thereof, production efficiency of an assembly type industry is effectively increased, thereby avoiding bonding of steel bars during connection of the primary beam and the secondary beams and cast-in-situ of concrete during assembly type construction in the current stage. Assembly rate is increased and the assembly type structure is strengthened. Accordingly, the novel assembly type primary and secondary beam connecting node and the connection method thereof drives building industrialization forward.

The invention discloses a tough combined bridge deck composed of cold-bent Z-shaped steel. The tough combined bridge deck comprises cold-bent curled Z-shaped steel, transverse reinforcing steel bars and ultrahigh-toughness concrete. And the cold-bent Z-shaped steel is transversely and continuously placed along the bridge deck and forms bridge deck steel framework through fillet weld welding. The lower side flange of the cold-bent Z-shaped steel is long and plays a role in reinforcing the outer side of the plate surface; the upper side flange is short and is provided with a row of circular holes, and the transverse reinforcing steel bars penetrate through the cold-bent Z-shaped steel flanges through the circular holes. And the ultrahigh-toughness concrete is poured on the bridge deck steelskeleton to play a role in protecting the bridge deck steel skeleton. In the combined bridge deck slab system provided by the invention, the ultra-high toughness concrete can ensure that tiny cracks of below 100 microns are not generated or only generated, and the toughness and durability of the structure are improved; the construction mode of combining the cold-bent Z-shaped steel and the transverse reinforcing steel bars replaces the anti-shearing and anti-pulling effects of studs, meanwhile, the out-of-plane stability of the bridge deck slab is improved, the material cost and the construction complexity are remarkably reduced, and the fatigue performance is excellent.

The invention discloses a bamboo ladder vehicle-mounted device, and relates to the field of power supply, in particular to a bamboo ladder vehicle-mounted device for repairing a vehicle. The bamboo ladder vehicle-mounted device is convenient to install and carry and saves time, and comprises an upper positioning assembly and a lower positioning assembly, the upper positioning assembly is arrangedon a front supporting plate of a compartment, the lower positioning assembly is arranged on a rear supporting plate of the compartment, and the upper positioning assembly and the lower positioning assembly are used for supporting a bamboo ladder; the upper positioning assembly comprises a pair of opposite L-shaped plates, the bottoms of transverse plates of the L-shaped plates are provided with positioning pillars, multiple positioning holes are formed in the front supporting plates, and the positioning pillars are adaptively arranged in the positioning holes; multiple first positioning grooves are symmetrically formed in each of the two sides of the bamboo ladder, and bolts can extend into the first positioning grooves. The bamboo ladder vehicle-mounted device improves working efficiencyand is reliable in vehicle mounting.

The invention discloses a novel prefabricated primary and secondary beam composite connecting node. The node comprises a primary beam. A trench is arranged in the middle position of the right side ofthe primary beam. The middle position in the interior of the trench is fixed with channel steel. Positions, located on left and right sides of the channel steel, in the interior of the trench are bothfixedly connected with secondary beams. Interiors of the secondary beams are fixedly connected with steel bars. One ends, approaching the middle of the trench, of the steel bars penetrate through outsides of the secondary beams. Surfaces on two sides of the channel steel are equipped with steel bar holes. One ends, located in the interior of the channel steel, of the steel bars are in threaded connection with nuts. The middle position outside the channel steel is equipped with a grouting circular hole. The node relates to the technical field of building beams. With the novel prefabricated primary and secondary beam composite connecting node and the connecting method thereof, improvements are made on assembly type primary and secondary beam connection. The connection efficiency of the primary beam and the secondary beams is increased. The wet construction amount is reduced. Assembly efficiency and productivity are improved. Safety and quality are enhanced. The purpose of driving modernization of the building industry is fulfilled.

The invention relates to the technical field of road engineering, in particular to a UHPC bridge deck pavement structure and a preparation method thereof. The paving structure comprises a paving unit, the paving unit comprises a UHPC layer, an interlayer binder layer, a long fiber layer, a gridding cloth layer and an interlayer binder layer which are sequentially arranged, the paving unit is circulated for multiple times, and finally, the UHPC layer is used for sealing. According to the invention, the use mode that the fibers and the mortar are mixed, conveyed and paved together in the traditional UHPC is abandoned, the short fibers and the long fibers are introduced into the UHPC, the adding opportunity and mode of the fibers with two sizes are adjusted, and the short fibers and the UHPC mortar are mixed in advance, so that the toughness of the UHPC is improved at one time on the premise that the construction difficulty is not increased.

The invention provides a novel building disassembly-free laminated slab with buckle type split heads. The novel building disassembly-free laminated slab comprises a bottom supporting plate and the multiple buckle type split heads; the top ends of the buckle type split head are supporting parts, and the bottom ends opposite to the top ends are fixing parts; the end parts of the supporting parts arestamped to form at least one punching groove; and the fixing parts are detachably connected and fixed with the surface of the bottom supporting plate. By means of the detachable split type design structure of the bottom supporting plate and the buckle type split heads, and therefore, the novel building disassembly-free laminated slab is low in cost, high in installation efficiency, high in production efficiency and wider in application range is provided.

The invention discloses a prefabricated assembly type toughness combined bridge deck slab with cast-in-place wet joints and a manufacturing method. The combined bridge deck slab is composed of profile steel combined prefabricated parts, prefabricated connecting parts, high-strength bolts and cast-in-place ultrahigh toughness concrete. In the section steel combined prefabricated parts, a bolt hole is formed in a flange of wide hot-rolled H-shaped steel, a transverse round steel bar is welded to a flange plate on the wide hot-rolled H-shaped steel, and ultrahigh-toughness concrete is poured after the high-strength bolts and screws are pre-embedded. In the prefabricated connecting parts, a bolt hole is formed in a flange of narrow hot-rolled H-shaped steel, and a transverse round steel bar is welded on a flange plate on the upper side of the narrow hot-rolled H-shaped steel. In the construction process, the section steel combined prefabricated parts and the prefabricated connecting parts are arranged side by side at intervals, the prefabricated parts are connected into a whole through the high-strength bolts, and the ultrahigh-toughness concrete is cast in situ on the upper portions of the prefabricated connecting parts, so that the cast-in-situ wet joints are formed. The system provided by the invention has the advantages of high toughness, high prefabrication degree, no need of arrangement of studs, no need of field welding, low cast-in-place concrete proportion, convenience in construction and remarkable improvement of structural fatigue performance.

The invention discloses a simple device for positioning a duct piece mold at a pre-buried channel. The simple device comprises a pre-buried anchor rod, a locking screw, a channel, an n-shaped anti-loose gasket, an E-shaped nylon connecting piece, a positioning support steel plate, a positioning connecting rod and a fastening nut. The defects that a traditional pre-buried channel is positioned by virtue of a ground anchor and a T-shaped bolt, the ground anchor easily makes contact with a steel bar, and a duct piece is difficult to demould are overcome. The E-shaped nylon connecting piece is arranged, so that the n-shaped anti-loose gasket and the positioning support steel plate are integrated, simple installation and accurate positioning of the channel are realized through the positioning connecting rod, the contact between the ground anchor and the main steel bar is avoided, and the demolding efficiency of the concrete duct piece is improved; a plastic component can be prevented from remaining in the concrete duct piece so as not to influence the stress performance of the duct piece; anti-skid ribs are arranged, so that the E-shaped nylon connecting piece, the n-shaped anti-loose gasket and the positioning support steel plate are difficult to fall off in the demolding process; and the n-shaped anti-loose gasket is arranged between the channel and the locking screw, so that the anti-loose performance of the pre-buried channel is improved.

The invention relates to the technical field of single lamp controllers, in particular to a single lamp controller applied to a street lamp, which comprises a lampshade, a lamp post, a mounting plate, a base, a protection plate, a mounting frame, a control box and a fixing plate, connecting rods are arranged on the outer walls of the two sides of the lamp post, the lampshade is arranged on the outer walls of the connecting rods, and the street lamp is arranged on the inner wall of the lampshade; the inner wall of the lamp post is of a tubular structure, a control line is arranged on the inner wall of the lamp post, a street lamp in the lampshade is electrically connected with the control line, the bottom end of the lamp post is fixedly connected with the base, a mounting plate is arranged on the outer wall of the lamp post, and the distance between the mounting plate and the base is small. And mounting grooves which are symmetrically distributed are formed in the outer wall of the mounting plate. According to the single lamp controller applied to the street lamp, due to the fact that the control box and the clamping opening are in clamping fit, the effect of rapid maintenance can be achieved only by replacing the control box, and binding of various electric wires at high-altitude operation is avoided.

The invention discloses a cold-formed steel tough combined bridge deck slab with box-shaped ribs. The cold-formed steel tough combined bridge deck slab is composed of cold-bending hemming section steel, transverse reinforcing steel bars and ultrahigh-toughness concrete. The cold-formed steel is transversely and continuously placed along the bridge deck and forms bridge deck steel framework throughfillet weld welding. Box-shaped ribs are formed on the lower side flanges of the cold-formed steel, the upper side flanges are short and are provided with a row of round holes, and transverse steel bars penetrate through the cold-formed steel flanges through the round holes. And the ultrahigh-toughness concrete is poured on the bridge deck steel skeleton to play a role in protecting the bridge deck steel skeleton. According to the invention, the ultrahigh-toughness concrete can ensure that no or only tiny cracks below 100 microns are generated, so that the toughness and durability of the structure are improved; the structural mode of combining the cold-formed steel and the transverse reinforcing steel bars replaces the anti-shearing and anti-pulling effects of studs; meanwhile, the out-of-plane stability and the transverse torsion stress performance of the bridge deck slab are remarkably improved through the box type closed stiffening ribs, the material cost and the construction complexity are remarkably reduced, and the fatigue performance is excellent.

The invention discloses a basic performance improvement technique of a basic ring type wind power tower, and relates to the technical field of wind power generation. The system comprises a basic ring,an anti-cracking steel cover plate, an annular connecting steel plate, a stud, a rigid connecting piece, high-strength round steel pipe supports and a pre-embedded plate, wherein the basic ring is embedded into foundation concrete, and the upper part of the basic ring is connected with a wind power unit tower; the anti-cracking steel cover plate is arranged in the junction of the basic ring and the top surface of the concrete, and the stud is welded on one surface, which makes contact with the concrete, of the anti-cracking steel cover plate; the annular connecting steel plate and the rigid connecting piece are arranged at an interval according to a certain distance in the height direction of the basic ring; and four to six high-strength round steel pipe supports are annularly arranged atthe bottom of the basic ring, and the lower ends of the high-strength round steel pipe supports are welded with the pre-embedded plate. According to the technique, the common stress performance of the basic ring and the concrete is improved, the prominent problems of connection damage to the basic ring, concrete cracking, a large amount of perforated steel bars, complexity in construction and thelike in a traditional basic form are solved, and the technique has broad engineering application prospects.