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:In this paper, the data monitored by the cable dynamometer installed on the top arch of the underground main building of Xiaolangdi Project during excavation are analyzed, and the frictional loss of the hole in the post-tensioned cable tension is calculated. The analysis of the two shows that the increase of anchor cable tension reflected in the monitoring data at this stage does not indicate that the rock mass of the roof arch of the powerhouse has subsidence deformation due to excavation, but is the result of the adjustment of the stress of the anchor cable after locking, but the excavation blasting of the powerhouse during this period has a transient effect on the change of anchor cable tension.

Abstract:The main cable of modern suspension bridge is composed of parallel wire strands. The construction of parallel wire strands can be made and erected by PWS method or AS method. This paper compares PWS method with AS method from some examples of Bridges, and introduces some new workarounds for Bridges. Finally, the future construction methods of the main cable of the longer span suspension bridge are prospected.