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Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel

ActiveCN103912132AImprove end anchorage reliabilityPlay a role in stretchingBuilding repairsFiberCarbon fibers
The invention relates to a frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel. The method includes: adhering and fixing two ends of a carbon fiber sheet to an L-shaped steel anchor plate, and mounting the anchor plate with the carbon fiber sheet to two ends of a frame beam; transversely downwardly tensioning the carbon fiber sheet, filling in a steel base plate, and adhering and fixing the steel base plate on the frame beam; using a U-shaped steel plate for synchronously, symmetrically, transversely and upwardly tensioning the carbon fiber sheet for once or multiple times, and fixing the U-shaped steel plate on the frame beam after the carbon fiber sheet is closes attached to the bottom of the frame beam; adhering a steal plate at the bottom of the beam with U-shaped steel hoops in sections at two ends, and anchoring through chemical anchor bolts. By the method, reliable tensioning anchoring and zero-gap adhering can be achieved easily, the high strength performance of the carbon fiber sheet is utilized to apply high-level prestress to the frame beam, the anti-shear bearing capacity of the frame beam is increased by comprehensively using a tensioning anchoring steel plate, the performances of the carbon fiber sheet and steel are brought into full play, and anti-bending and anti-shear bearing force synergetic reinforcement of the frame beam is achieved.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Vegetable earthworm cultivation ecological system for overcoming soil salinization and continuous cropping obstacles

The invention discloses a vegetable earthworm cultivation ecological system for overcoming soil salinization and continuous cropping obstacles. The vegetable earthworm cultivation ecological system comprises a plurality of vegetable planting ditches, multiple earthworm breeding ditches, a fermentation tank and earthworm breeding net cages. The plurality of vegetable planting ditches and the plurality of earthworm breeding ditches are arranged alternatively, and an operation space is formed between one vegetable planting ditch and one earthworm breeding ditch which are adjacent to each other. The fermentation tank is arranged near the plurality of vegetable planting ditches, and organic waste is contained in the fermentation tank. The earthworm breeding net cages are filled with earthworm breeding substrates, the earthworm breeding substrates are prepared by mixing a fermentation product of the organic waste in the fermentation tank with soil, and earthworms are put into the earthworm breeding net cages; and the plurality of earthworm breeding net cages are placed in each earthworm breeding ditch. According to the system, low-cost resource utilization of organic waste treatment is achieved, continuous cropping obstacles and salinization obstacles are overcome, organic circulation of vegetable production and efficient earthworm breeding are combined, and multiple effects and high-benefit output are achieved.
Owner:NINGXIA UNIVERSITY
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