30results about How to "Ensure on-site construction quality" patented technology

The invention discloses a detachable prefabricated assembly type square steel tube concrete column base joint. The detachable prefabricated assembly type square steel tube concrete column base joint comprises a square steel tube concrete column and a reinforced concrete foundation, wherein a bottom plate is welded to the end of the square steel tube concrete column, high-strength screw rods are welded to the inner side of the bottom plate, the high-strength screw rods as anti-shearing members are connected with pre-embedded corrugated sleeves of the foundation, and meanwhile, the welding screw rods are coated with plastic films. Preformed screw holes are formed in the outer side of the steel tube bottom plate and used for making splice anchor bolts and the bottom plate connected. When the square steel tube concrete column base joint is assembled, connecting screw rods are screwed into the upper ends of through tang inner screw-thread steel sleeves through the preformed screw holes in the bottom plate respectively, so that splicing between the square steel tube concrete column and the foundation is achieved. When the steel tube concrete column is disassembled and replaced, the screw rods are screwed out, the anti-shearing members are taken out, high-strength castables in the corrugated sleeves are removed, and then the steel tube concrete column can be disassembled and replaced. All the members used in the square steel tube concrete column base joint can be assembled and connected on the site, site welding work and formwork engineering are reduced, the building industrialization assembly efficiency is improved, and the new architectural concepts that building members save energy and are environmentally friendly and detachable are embodied.

The invention discloses a detachable assembly type splicing node for reinforced concrete columns by adopting steel connecting pieces. The splicing node mainly comprises a reinforced concrete upper column, a reinforced concrete lower column, steel connecting pieces, outward extending longitudinal ribs and two steel sealing plates with grouting holes, wherein by outwards extending the longitudinal ribs of the reinforced concrete columns, firstly the outward extending longitudinal ribs of the reinforced concrete columns are inserted into bolt holes of the steel connecting pieces and are screwed up by nuts and spacers, then the two sides of the steel connecting pieces are sealed by the steel sealing plates with holes, and grouting is implemented through the grouting holes, so that the reinforced concrete columns can be spliced. When the reinforced concrete columns are changed, the reinforced concrete columns are separated from the steel connecting pieces by cutting the steel sealing plates, cleaning mortar and disassembling the nuts, so that the disassembly and replacement of the upper column and the lower column are realized. According to the splicing node, the all used members are assembled and connected on site, the onsite welding work and template engineering can be reduced, the construction industrialization assembly efficiency can be improved, and a novel energy-saving, environment-friendly and detachable construction concept of the construction members is reflected.

The invention provides a dismountable assembly type circular steel tube concrete column. The dismountable assembly type circular steel tube concrete column mainly comprises an upper circular steel tube concrete column, a lower circular steel tube concrete column, a column flange connecting piece, two semicircular steel plates with holes and a pulling-resistant connecting pair. Structural measures of the circular steel tube concrete columns and the column flange connecting piece are reasonably designed, the pulling-resistant connecting pair is adopted for splicing the circular steel tube concrete columns, then grouting is carried out from the reserved semicircular holes of the semicircular steel plates, and finally, the dismountable fabricated circular steel tube concrete column is formed. When the circular steel tube concrete columns are replaced, a bolt bar is dismounted, so that the circular steel tube concrete columns and the column flange connecting piece are taken down, and further removal and replacement of the circular steel tube concrete columns are realized. The dismountable assembly type circular steel tube concrete column has the advantages that all the components are connected in a field assembly manner, building industrialization assembling efficiency is improved, dismounting, separating and replacing functions of an assembly type combined structure column-column component are realized, and a novel energy-saving and environment-friendly architectural concept that a building component can be dismounted and altered is shown.

The invention discloses an assembled concrete filled steel tubular column splicing structure and method. The assembled concrete filled steel tubular column splicing structure comprises prefabricated upper and lower concrete filled steel tubular columns, steel bars are embedded in the upper concrete filled steel tubular columns, and corrugated casing pipes are embedded in the upper concrete filled steel tubular columns. After the reserved corrugated casing pipes are filled with concrete grout in a constructions site, the embedded steel bars in the upper concrete filled steel tubular columns are inserted into the corrugated casing pipes to make the upper concrete filled steel tubular columns arranged on the lower concrete filled steel tubular columns and in butt joint with the lower concrete filled steel tubular columns, and then steel pipe connecting parts are welded to achieve concrete filled steel tubular column splicing. All the members used in the structure are assembled and connected in the site, a site formwork project and welding work are decreased, the industrialized assembling efficiency of a building is improved, and the energy-saving and environmentally friendly building design concept for sustainable development of building members is embodied.

The invention discloses a prefabricated reinforced concrete shear wall vertical splicing joint structure and a construction method thereof. The prefabricated reinforced concrete shear wall vertical splicing joint structure comprises an upper reinforced concrete shear wall and a lower reinforced concrete shear wall, and an area between the lower end of the upper reinforced concrete shear wall and the upper end of the lower reinforced concrete shear wall is a connecting area. Ultra-high performance concrete is poured in the connecting area to enable the upper reinforced concrete shear wall and the lower reinforced concrete shear wall to be connected as a whole. The prefabricated reinforced concrete shear wall vertical splicing joint structure applies the ultra-high performance concrete between the reinforced concrete shear walls, and fully utilizes the excellent compression resistance and tensile performance of the ultra-high performance concrete, thereby solving the problem of weak connection in joint regions.

The invention discloses a fabricated composite shear wall and a connection structure with steel beams and floors thereof. The connection between edge members and walls is realized by cast-in-situ concrete poured in cavities of steel pipes of the edge members, the connection structure is simple and reliable, the quality of field construction of the shear wall can be guaranteed, and the advantages of concrete and a steel structure can be given full play, namely, the compressive performance of the concrete and convenient construction of the steel structure, and it is ensured that the fabricated composite shear wall has good lateral stiffness; and compared with existing double-layer steel plate composite shear walls, the fabricated composite shear wall and the connection structure with the steel beams and the floors thereof can save more than 50% of the amount of steel, and reduce the amount of concrete pouring in the construction site and the amount of framework construction in the construction site, so that the construction of the shear wall is speeded up and the use of workers is reduced. The connection structure of the shear wall and the steel beams realizes the connection betweenthe steel beams and the fabricated composite shear wall by using joint members, and the occupied space of the connection structures can be saved.

The invention provides a column and curved beam horizontal and flexible connection space structure system. Columns and curved beams are horizontally and flexibly connected through horizontal and flexible connecting devices, each horizontal and flexible connecting device comprises a column connector, a curved beam connector a and a steel pull rod for connecting the column connector with the curved beam connector. A vertical suspending connecting device is further connected onto each curved beam and comprises a curved beam connector b and a movable steel suspending rod. The column and curved beam horizontal and flexible connection space structure system is a grid structure and suspended-cable structure combined space structure system. In a space truss structure system, the strength and ductility of a grid curved beam structure are improved, bending resistance bearing capacity of the curved beams is remarkably improved, and deflection deformation of the curved beams is reduced. In a suspended-cable structure, suspended steel structure curved beams are connected through flexible suspending rods. The column and curved beam horizontal and flexible connection space structure system has the flexible connection characteristic, accordingly is simple in overall appearance, even in stress, good in anti-seismic energy dissipation performance and easy to repair and maintain and meets the comfort degree requirement of a suspended steel structure.

The invention provides a prefabricated non-reinforced concrete framework. The prefabricated non-reinforced concrete framework is composed of prefabricated concrete joint columns, prefabricated concrete beams, steel connecting parts and grouting pipes. The prefabricated concrete joint columns and the prefabricated concrete beams are formed by pouring polyethylene fiber concrete. The polyethylene fiber concrete is formed by mixing cement, sand, water, coal ash, water reducer and polyethylene fibers. The invention further provides a construction method of the prefabricated non-reinforced concreteframework. Use of rebars is avoided while the strength and the ductility of components are guaranteed, splicing joints and the construction method are adopted, resources can be effectively saved, andthe site construction efficiency and the quality safety level can be improved.

The invention relates to the related field of constructional engineering, in particular to a splicing structure of a fabricated concrete-filled steel pipe column. The splicing structure of the fabricated concrete-filled steel pipe column comprises an upper steel pipe column, a splicing shell and a lower steel pipe column. According to the splicing structure of the fabricated concrete-filled steel pipe column, the splicing shell, a connecting and fixing rod, an upper sealing plate and a lower sealing plate used in the splicing structure are all processed in a factory and can be assembled and connected on a construction site after being transported to the construction site, on-site welding work and formwork work are reduced, the on-site construction quality is guaranteed, and the building industrial assembly efficiency is improved; second reinforcing ribs are connected to the upper end and the lower end of a mounting frame, the top ends of the second reinforcing ribs are arranged in the upper steel pipe column and the lower steel pipe column, a plurality of arc-shaped grooves are evenly formed in the surfaces of the second reinforcing ribs, and first reinforcing ribs are horizontally welded to the inner cavity walls of an upper splicing groove and a lower splicing groove in parallel, so that the second reinforcing ribs and the first reinforcing ribs are better adhered to concrete when the concrete is poured, so that the bearing capacity and the deformability of the concrete-filled steel pipe column are improved.

The invention discloses a combined bridge capable of prolonging the fatigue life of shear connectors and a manufacturing method thereof. Each steel box beam comprises two steel beams extending in thelength direction of the bridge and a plurality of first transverse diaphragms arranged in the length direction of the bridge at intervals. Each first transverse diaphragm is fixedly connected with thetwo corresponding steel beams, a supporting plate extending in the length direction of the bridge is arranged at the top end of each steel beam, and the shear connectors are fixedly connected to thesupporting plates; reserved holes which are the same as the shear connectors in number and are in one-to-one correspondence with the shear connectors are formed in the bottom end of a concrete deck slab, and when the concrete deck slab is placed on the steel box beams, each shear connector extends into the corresponding reserved hole; and an epoxy mortar layer is poured into the space between thetwo ends of each supporting plate and the concrete deck slab. According to the combined bridge, the bonding force of a bonding interface between the steel box beams and the concrete deck slab is effectively increased, the shear capacity of the bonding interface is improved, stress concentration of the shear connectors and the concrete deck slab is improved, and thus the fatigue life of the shear connectors is effectively prolonged.

The invention provides a steel box beam and concrete column hinged joint and a construction method thereof. The steel box beam and concrete column hinged joint comprises a concrete column and a steelbox beam. The end of the steel box beam is located on the column side bracket of the concrete column, and a rubber support is arranged between the steel box steam and the column side bracket. The steel box beam and the column side bracket are fixed through multiple foundation bolts. An inner supporting assembly is arranged in the steel box beam and located in the foundation bolt installation area.According to the steel box beam and concrete column hinged joint, the rubber support and the inner supporting assembly are adopted to jointly connect the steel box beam and the concrete column, so that shear force transmitted by the steel box beam can be transmitted, rotation deformation of the steel box beam in the bent direction is reasonably released, and reliability and implementation performance of joint connection are improved; and meanwhile, a bolted fixation manner is adopted, on-site fixation of the steel box beam and the concrete column is adjusted into the steel box beam, on-site welding operation is canceled, the space in the steel box beam is fully utilized, the space problem of on-site installation is solved, and on-site construction quality and component stress requirementsare effectively guaranteed.

The invention provides a flexible mineral insulated cable construction method, which belongs to the technical field of electric wire and cable engineering. The method comprises the steps of cable bracket model selection, field positioning and the like, and is characterized in that a cable path is planned in advance, including wall body treatment and bracket manufacturing and mounting; under the condition of ensuring firmness, cable laying is carried out, the cables are classified and sorted according to the types and specifications of the cables and then are fixed through ribbons; the on-siteconstruction quality is guaranteed, construction is easy, convenient and rapid, the construction progress and the engineering quality are greatly promoted, and good economic benefits and social benefits are obtained. The problems that according to a common laying method, many bridges are needed, the construction investment is large, the construction space is small, and the construction period is long are well solved, a launching type laying part adopts a bridge-free construction mode, and the construction cost is reduced; and a trunk type laying part adopts a prefabricated branch cable and adopts a cable bracket for laying, so that the fireproof requirement of a super high-rise building on the cable is successfully met.

The invention discloses a normal-temperature curing type concrete column with superhigh property and a construction method thereof. The normal-temperature curing type concrete column has the advantages that the technique is feasible, and the construction is convenient and rapid; the concrete can be cured under the normal temperature environment, so as to obtain the concrete with superhigh property; the bearing capacity of the reinforced concrete column is greatly improved, the site construction quality is guaranteed, and the construction efficiency is improved; the autoclave equipment is not required, the construction cost is reduced, and the normal-temperature curing type concrete column is suitable for popularization in actual engineering.

The invention discloses a set-control type repair mortar for a prefabricated part and a preparation method thereof. The set-control type repair mortar is characterized by comprising the following components in parts by mass: 10-15 parts of ordinary cement; 30 to 35 parts of special cement; 5-8 parts of gypsum; 30 to 45 parts of sand; 1-2 parts of a water reducing agent; 1-4 parts of a thickening time control agent; 0.5 to 2 parts of a defoaming agent; 0.5-2 parts of a penetrant; the special cement is one or a mixture of sulphoaluminate cement and aluminate cement, and the thickening time control agent is a mixture of lithium silicate, silica sol and bauxite. The thickening time control agent is prepared through high-speed stirring, and then the repairing mortar is prepared through mixing. The prepared repairing mortar is adjustable in setting time, high in early strength and high in bonding strength, and can meet the repairing requirements of the fabricated prefabricated parts.

The invention provides a decorative insulation board with a self-cleaning function and a preparation method of the decorative insulation board. The insulation board comprises a self-cleaning layer, adecorative surface layer, an insulation layer, a bonding layer and a base layer which are sequentially stacked from top to bottom. The preparation method comprises the following steps that (I), a layer of mineral aggregate coated with a nano self-cleaning coating on the surface is laid on the bottom of a mold, and the self-cleaning layer is formed; (II), slurry is poured on the self-cleaning layer, a reinforcing material and a thermal insulation material are sequentially laid on the surface of the slurry, and the mold is vibrated so that the reinforcing material can be embedded into the slurry; and (II), curing is performed until the slurry is cured and molded, the decorative surface layer formed by the slurry and the insulation layer formed by the thermal insulation material are obtained,the decorative surface layer is subjected to hardening treatment, the insulation layer and the base layer are bonded through the bonding layer, and the decorative insulation board is obtained. The decorative insulation board with the self-cleaning function not only has high strength, good integrity and good insulation performance, but also is attractive in decoration effect and durable in use.