Abstract:Based on the experience of deep foundation pit support and rescue project of Gonghua Hotel and Department of Finance in Nanning, Guangxi, as well as the investigation and analysis of the main reasons for the foundation pit instability of more than 20 high-rise buildings, such as Tai 'an, Yindu, civil air Defense Office and exchange field, this paper puts forward some effective measures to avoid engineering accidents for reference in design and construction.

Abstract:

Abstract:With the continuous application and development of prestressed construction technology in high-rise, multi-storey, single-storey buildings and Bridges, hydraulic engineering, slope protection and pool, tank tower and other projects, the requirements for anti-corrosion technology of prestressed materials are more and more stringent. At the same time, the shortcomings of the pre-stressed materials used in the special environment in the anti-corrosion technology have gradually emerged. Recently, the PC steel strand, an important part of the PC component, was reported when various accidents occurred due to corrosion. In order to fundamentally solve the problem of anti-corrosion in special environments and adapt to the development requirements of prestressing technology,OVM has introduced the anti-corrosion method of epoxy resin spraying of PC prestressed materials from abroad since 1994. This paper introduces the epoch-making new anti-corrosion prestressing material epoxy resin coated PC steel strand produced by OVM company.