38results about How to "Low construction precision requirements" patented technology

The invention discloses an H-shaped steel beam and H-shaped steel column minor axis variable beam height fabricated node and a construction method thereof. The node comprises an H-shaped steel column, an H-shaped steel beam, a column sealing piece, a T-shaped connection piece, an L-shaped connection piece and bolts. The column sealing piece consists of a column sealing plate, a beam upper flange stiffening rib and a column sealing plate stiffening rib; the T-shaped connection piece consists of an upper flange plate connection plate which is arranged horizontally and a web connection plate which is perpendicular to the bottom surface of the upper flange plate connection plate; the L-shaped connection piece consists of a lower flange plate connection plate which is arranged horizontally and a column connection plate which is perpendicular to the lower flange plate connection plate downward. All accessories required by the node are prefabricated in a factory, the requirement of equal-strength connection in the process of changing the section of the H-shaped steel beam in a certain range can be met, high-strength bolts are adopted by a construction field node so as to realize the fabricated connection, and the node is high in rigidity and high in connection speed, and can meet the requirement of the fabricated construction of a steel structure.

The invention discloses an H-shaped steel beam and H-shaped steel column strong-axis variable-beam height fabricated node and a construction method thereof. The node comprises an H-shaped steel column, an H-shaped steel beam, a T-shaped connection piece, an L-shaped connection piece and bolts; the T-shaped connection piece consists of an upper flange plate connection plate which is arranged horizontally, and a web connection plate which is perpendicular to the bottom surface of the upper flange plate connection plate; the upper flange plate connection plate is connected with an upper flange plate through the bolts; the web connection plate is connected with a web through the bolts; the L-shaped connection piece consists of a lower flange plate connection plate which is arranged horizontally and a column connection plate which is perpendicular to the lower flange plate connection plate downward; the lower flange plate connection plate is connected with a lower flange plate through the bolts; and the column connection plate is connected with a column flange plate of the H-shaped steel column through the bolts. All accessories required by the node are prefabricated in a factory, the requirement of equal-strength connection in the process of changing the section of the H-shaped steel beam in a certain range can be met, high-strength bolts are adopted by a construction field node so as to realize the fabricated connection, and the node is high in rigidity and high in connection speed, and can meet the requirement of the fabricated construction of a steel structure.

The invention discloses a highway and railway layered steel box beam. The highway and railway layered steel box beam comprises a box beam top board and a box beam bottom board, wherein the box beam bottom board is located below the middle portion of the box beam top board, a supporting structure is arranged between the box beam top board and the box beam bottom board and is of a truss-type box structure, edge webs which extend in the vertical direction are arranged at the two transverse ends of the box beam top board, an edge bottom board is arranged between the lower end of each edge web and the end portion of the same side of the box beam bottom board, and an inverted-trapezoidal box cavity is defined by the box beam top board, the edge webs, the edge bottom boards and the box beam bottom board. On the basis of a conventional steel box beam, the height of the section is increased, and a railway can be arranged inside the steel box beam; the supporting structure between the box beam top board and the box beam bottom board is of the truss-type box structure, and compared with an integrated type steel box beam, the highway and railway layered steel box beam saves rolled steel.

The invention provides a construction method for an assembly type bridge pier column and a bearing platform, and relates to the technical field of assembly type bridge construction. The method comprises the steps: 1, prefabricating the pier column; 2, manufacturing the bearing platform with a bearing platform reserved slot hole on the upper end face; 3, installing the pier column into the bearingplatform reserved slot hole; 4, pressing grouting materials into the bearing platform reserved slot hole; wherein step 1 comprises the substeps of prefabricating a first part and a second part of thepier column, wherein the outer diameter of the first part is smaller than that of the second part, and connecting the first part to the lower end surface of the second part; the step 1 further comprises the substep of arranging a transverse anchoring head and a vertical anchoring head; and in the step 3, the first part of the pier column is installed into the bearing platform reserved slot hole until the lower end face of the second part is not higher than the opening depth of the bearing platform reserved slot hole. The construction method is convenient and fast to construct, can enable the connection of the pier column and the bearing platform to be stable, and is suitable for wide-range popularization.

The invention discloses a lock chain type earthquake damage replaceable energy dissipation device. The lock chain type earthquake damage replaceable energy dissipation device comprises a U-shaped pre-embedded joint (1), a lock chain type button (2) with a switch, a reinforcing rib sleeve (3), top end of which is connected with a circular ring, and an energy dissipation steel rod (4). The device is used in a dry joint section splicing pier; the U-shaped pre-embedded joint (1) is separately pre-embedded into the top of a bearing table and the bottom of a bottom second section; the U-shaped pre-embedded joint (1) is connected to the reinforcing rib sleeve (3), top end of which is connected with the circular ring through the lock chain type button (2) with the switch; and connecting heads (4.1) at the two ends of the energy dissipation steel rod (4) are connected with the reinforcing rib sleeve (3), top end of which is connected with the circular ring. The dry joint section splicing pier using the lock chain type earthquake damage replaceable energy dissipation device has good self-turn capacity and energy dissipation capacity; and moreover, the lock chain type earthquake damage replaceable energy dissipation device is replaced after an earthquake, so that rapid repair for the pier after the earthquake is realized.

The invention discloses a template table with the integrated installation of beam columns. The template table comprises a template, and two or more pairs of integrated beam columns arranged at the bottom part of the template, wherein each integrated beam column comprises a support plate, an installation plate, two or more horizontal support beams, vertical support rods with the quantity being thesame as the quantity of the two or more horizontal support beams, and inclined support rods with the quantity being the same as the quantity of the two or more horizontal support beams; the support plates are in circular shapes; annular guide rail slots extending along the circumferential directions of the support plates are formed in the outer circumferential walls of the support plates; and universal joints are connected to one ends of the horizontal support beams, are slidably arranged in the annular guide rail slots, and can rotate in the annular guide rail slots around own axes.

The invention provides a cluster grouting corrugated pipe assembled pier connected with a prefabricated bearing platform and a construction method. The assembled pier comprises a foundation, pier column sections and top cap sections. The foundation is formed by connecting foundation prefabricated sections through foundation connecting seams, connecting steel bars are pre-buried in the top surfacesof the foundation prefabricated sections and the prefabricated pier column sections, bundling connecting corrugated pipes are pre-buried in the bottom surfaces of the corresponding prefabricated piercolumn sections and the prefabricated top cap sections, the pre-buried connecting steel bars penetrate into the bundling connecting corrugated pipes, and then a high-strength grouting materials are poured; the top cap connecting sections and the top cap sections are connected through top cap splicing seams, and then the connecting steel plates are connected in a welded mode; and steel strands penetrate through the pre-buried corrugated pipes pre-buried in all the sections and are arranged in a U shape, the steel strands are tensioned at the top of the top cap, then foundation connecting joints are constructed, and then concrete is poured to complete splicing. The spliced pier connecting steel bars are arranged in a bundled mode, a construction tolerance is large, a construction precisionrequirement is low, splicing difficulty is small, grouting efficiency is high, the top cap sections are quickly spliced, prestress installation is convenient and fast, and cost is low.

The invention belongs to the field of membrane assemblies, and particularly relates to high-integration-level immersed ultrafiltration membrane equipment, which comprises a bracket and a plurality ofultrafiltration membrane assemblies symmetrically arranged in two rows, wherein the ultrafiltration membrane assembly comprises a shell and a membrane tow arranged in the shell, one end of the membrane tow is a water production end, the other end of the membrane tow is a closed end, a water production box is arranged at the water production end, an aeration box is arranged at the closed end, a fixing resin is arranged in the water production box and is used for fixing the membrane tow, a water production port communicated with the water production box is formed in the top of the water production box, the water production port is connected with a connecting elbow through a valve, a water production elbow is connected with a water production main pipe through an anti-loose joint, an aerationpipe groove matched with an aeration branch pipe is formed in the aeration box, and the aeration branch pipe can be inserted into the aeration pipe groove to position the ultrafiltration membrane assembly. Due to the fact that the aeration branch pipe below the single ultrafiltration membrane assembly is connected with the ultrafiltration membrane assembly in a pluggable mode, when the ultrafiltration membrane assembly is replaced and maintained, the requirements for in-situ replacement and after-sales repair of the membrane assembly can be met after the liquid level is lowered.

The invention discloses a connecting structure of a concrete precast beam and a steel beam and a construction method of the connecting structure. The connecting structure comprises the concrete precast beam and the steel beam. Two grooves which are matched with the ends of the steel beam and are coaxial are reserved in the concrete precast beam, the two grooves are symmetrically formed in the two sides of the concrete precast beam, and a bolt hole for a split bolt to penetrate through is reserved between the two grooves. The ends of the two steel beams are arranged in the two grooves of the concrete precast beam, the split bolts penetrate through the bolt holes to fix the two steel beams, a fixing steel bar located on the upper sides of the steel beams is further arranged between the two steel beams, and the two ends of the fixing steel bar are welded and fixed to the two steel beams respectively. A gap at the joint of the concrete precast beam and the steel beam is filled with concrete. According to the connecting structure, the structural design is reasonable, the requirement for assembly precision is low, the steel beams are doubly fixed through the split bolts and the fixing steel bars, the gaps are filled with pouring concrete, and the connecting structure is good in reliability; the construction method is easy to operate and high in construction efficiency.

The invention discloses a novel prefabricated assembly type shear wall horizontal joint structure and a construction method, and relates to the technical field of building structure engineering. The four high-strength ribbed longitudinal bars are evenly arranged on the two sides of the prefabricated shear wall, the five hoop-shaped high-strength ribbed steel bars evenly and horizontally surround the four high-strength ribbed longitudinal bars and are perpendicularly distributed in the prefabricated shear wall, and the hoop-shaped high-strength ribbed steel bars and the high-strength ribbed longitudinal bars are connected in a binding mode through binding wires. Inner cavities in the two sides of the prefabricated shear wall are fixedly connected with the square steel tube bundles, H-shaped steel connecting pieces are installed between the upper ends and the lower ends of every two adjacent square steel tube bundles, and the H-shaped steel connecting pieces and the square steel tube bundles are fixed through high-strength bolts. And meanwhile, the safety of the structure can be guaranteed, the building period is shortened, and the connecting mode has great social benefits and economic benefits.

The invention discloses a connecting structure for a prefabricated concrete wall and concrete edge columns and a construction method. The connecting structure comprises the concrete edge columns, theconcrete wall, first vertical stirrups, second vertical stirrups and connecting stirrups, wherein each concrete edge column comprises a column body and first protruding parts, the plurality of first protruding parts are longitudinally distributed on one side of each column body at intervals, a first groove is formed between every two adjacent first protruding parts, and the first vertical stirrupsare connected with the concrete edge columns and located in the first grooves; the concrete wall comprises a wall body and second protruding parts, a plurality of second protruding parts are longitudinally distributed on the two sides of the wall body at intervals, a second groove is formed between every two adjacent second protruding parts, and the second vertical stirrups are connected with theconcrete wall and located in the second grooves; and the first vertical stirrups and the second vertical stirrups are bound through the connecting stirrups, the first protruding parts and the secondprotruding parts are opposite, gaps exist between the first protruding parts and the second protruding parts, and concrete is poured on the first vertical stirrups, the second vertical stirrups and the connecting stirrups to form a cast-in-place stripe.

The invention discloses a prestressed anchoring structure system for pier assembly and a pier assembly construction method. The prestressed anchoring structure system comprises a bonding type fixed end anchorage device located in a base, a clamping piece type tensioning end anchorage device located at the top of a pier column, a steel strand cable and an embedded pipe. The embedded pipe is divided into two sections; the embedded pipe section I is arranged in the pier column, the upper end of the embedded pipe section I is hermetically connected with an anchor bearing plate, and the lower end of the embedded pipe section I is positioned at the bottom of a pier column; the embedded pipe section II is arranged in the base, the upper end of the embedded pipe section II is positioned at a splicing surface sealing notch in the top surface of the base, and the lower end of the embedded pipe section II is hermetically connected with the top of the horn-shaped anchor bearing plate; a splicing surface sealing ring is mounted at the splicing surface sealing notch in the top surface of the base; in the assembly state, in an inner cavity of the horn-shaped anchor bearing plate, a steel strand bundle containing the extrusion head and poured high-strength mortar are bonded and anchored, and force is transmitted into the base through the horn-shaped anchor bearing plate; and the bottom of the horn-shaped anchor bearing plate is hermetically connected with the end cover plate. The fixed end of the prestressed anchoring structure system is reliably anchored, and the requirement for pre-embedded construction is low; and the structure is simple and the cost is low.