Neruping Bridge is located in Zhenxiong County,Yunnan Province,connecting the poverty-alleviation relocation resettlement site and the urban center,which is a control project for the development of the transportation system in Zhenxiong.Because the terrain of the bridge site is a V-shaped valley,a(6×40)m simply-supported prestressed concrete T-beam bridge is adopted considering the economy and construction speed.The superstructure is a prestressed concrete T-beam with simply-supported structure and continuous bridge deck,the substructure piers are hollow thin-walled piers and solid plate piers,the abutments are U-shaped gravity abutments and lightweight abutments.The pile foundation is the bored socketed pile with a diameter of 1.5 m and 2.0 m,and the bearing layer is a medium-weathered basalt layer.The construction of the pier is carried out by slip form construction,and the T-beam is erected and installed by bridge erecting machine.In the design of the bridge,measures such as setting shear pins at the bottom of T-beam and the top of capping beam are adopted to meet the requirements of position limit of the structure and the anti-slip of large longitudinal slope under seismic action.
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