Abstract:This paper briefly introduces the first domestic self-anchored flexible suspension bridge a Lijun Bridge "finished cable" suspension and cable construction process, the type of suspension cables, cable clamping force of the loading of the preliminary discussion.

Abstract:Based on the author's practical experience of participating in the construction of jacked girder bridges in foreign countries, he describes in detail the design and construction of five new technologies and techniques that have not been used or have rarely been used at home and abroad.

Abstract:The development of pre-stressed concrete technology has led to the widespread adoption of large-area and large-space structures in civil buildings. Guangzhou New Baiyun International Airport Passenger Terminal Building is the largest terminal building in China, with novel structure, complete functions and grand appearance. The main structure is an extra-long, large-span, large-area continuous prestressed girder-slab structure, and the design and construction of prestressing is the key to this project. This paper mainly introduces the design points and construction technology of post-tensioned prestressing.

Abstract:The control system of steel cable type hydraulic lifting equipment is an automatic operating system controlled by computer. It has signal detection, computer control, hydraulic servo drive and system monitoring and other functions. The system can not only complete the jack cluster control, lifting synchronization control, rigging load control, but also has a strong construction site adaptability and system reliability.

Abstract:

Abstract:Cement paste is usually used as the grouting material for prestressing apertures, which is a commonly used construction material for preventing rusting of prestressing tendons and partially transferring prestressing force, and is generally mixed on site with a cement paste mixer. In our engineering practice, due to the limited conditions of the site, we often encounter some construction units in order to save time and require a concrete mixer instead of a special grouting equipment for grouting.