Long - Span Continuous Rigid Frame Bridge Alignment Control

Basing on the construction LuoHe super giant bridge, According to its special character of the geometric control over high-pier and long-span continuous rigid frame bridges, this paper emphatically discusses how to build the measure control network and analyses the conditional variance of it, brings forward a calculation method of three-dimension coordinates in space. Basing on the control network many jobs were done including the measure of pile foundation' s sedimentation, the verticality observation of hollow-thin-will piers and trigonometric leveling of the full station device. Thought the analysis of the construction of LuoHe super giant bridge, the paper provides reasonable values of per-arch for cantilever construction. The research result of this paper has gained a good use to the geometric control over high-pier and long-span continuous rigid frame bridge on the HuangLing-YanAn highway in ShaanXi province.