2results about How to "Guaranteed strength and rigidity" patented technology

The utility model discloses a novel prefabricated high-strength combined guardrail structure for a bridge. A prefabricated concrete base unit is used for being connected with a bridge panel and fixing a steel structure guardrail unit; a wet joint notch is formed in the bottom face of one side of a head-on collision face of each prefabricated concrete base unit, annular steel bars are arranged in the wet joint notches, U-shaped steel bars are arranged on a bridge face plate, and the adjacent annular steel bars are connected through longitudinal steel bars in a binding mode. The annular reinforcing steel bars and the U-shaped reinforcing steel bars are oppositely staggered, U-shaped openings of the U-shaped reinforcing steel bars are provided with hooks, transverse sealing reinforcing steel bars are arranged between the hooks of the U-shaped reinforcing steel bars, and the transverse sealing reinforcing steel bars and the longitudinal reinforcing steel bars are arranged in an intersecting mode. According to the scheme, on one hand, the prefabricated concrete base unit is connected with the bridge panel through the cement mortar cushion layer, on the other hand, the open-type wet joint notches are formed, connection between the prefabricated concrete base unit and the bridge panel is enhanced through the UHPC grouted in the notches and the steel bars arranged in the staggered mode, the construction quality is effectively guaranteed, and the construction difficulty is reduced; and the quality of the prefabricated guardrail is effectively improved.

The application relates to the technical field of ring main units, and provides a compact upper isolation environment-friendly gas ring main unit, which comprises a gas tank body, upper isolation movable and static contacts fixed in the gas tank body through a switch support frame, a conductive busbar row, a solid-sealed pole, a grounding knife switch, a circuit breaker mechanism main shaft and an isolation knife switch rotating shaft, and a side incoming line sleeve and an outgoing line sleeve are arranged on the outer side of the gas tank body; the solid-sealed pole is a full solid-sealed structure, and three-phase solid-sealed poles are horizontally arranged in the gas tank body; and the upper isolation movable and static contacts are designed in linkage with the grounding knife switch. The full solid-sealed structure of the solid-sealed pole reduces the size of the solid-sealed pole itself, the horizontal arrangement mode reduces the size of the circuit breaker, the size of the ring main unit is further reduced, and the arrangement in a limited space is facilitated.