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Abstract:YCWB lightweight jack is the replacement product of YCW type jack, which is one of the first products developed after the enterprise passed the international certification of ISO9000 quality system, and its development steps are carried out in strict accordance with the requirements of ISO9000 standard, and the quality of products is well guaranteed. Its main features are: small size, light weight, good performance. the successful development of YCWB lightweight jack not only makes it become the leading product of similar products in the domestic market, but also enter the international market. The competition of modern enterprise is the competition of technology

Abstract:This paper through the epoxy mortar grip wrapped diagonal cable anchor head, the required strand bonding length of the calculation and tensioning test, verified that the epoxy mortar on the strand holding force, the bonding force of the anchorage to meet the requirements of the relevant provisions.

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Abstract:In this paper, the preliminary design of the hybrid cable-stayed suspension bridge with a center span of 2500m was carried out, and three types of cable-stayed suspension bridges and one type of suspension bridge were conceived. From the preliminary design results, comparing the weight of their superstructure steel, it is found that the cable-stayed suspension bridges are superior to the suspension bridges considering the size of the substructure. In addition, bending stability analysis and coupled vibration analysis were carried out for these types of bridges. The analysis results show that the bending stability of cable-stayed suspension bridges is sufficient, and its critical wind speed is higher than the critical wind speed of suspension bridges. Therefore, the authors believe that the hybrid cable-stayed suspension bridge for long-span bridges is better than the suspension bridge.

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