High Pier And Large Span Continuous Rigid Frame Bridge Construction Research Of Key Technologies

With the rapid transit development of China highway and railway, more long span bridges are needed to pan great rivers and bays, PC continuous rigid frame bridge emerged as the times require and was developed fleetly in recent years. The PC rigid frame bridge can meet with the carrying capacity of long span bridge. This kind of structure is fit for the comfortable steer with no other expansion joints except for those at the two ends. It characterized the wholeness of structure,good astigmatic ability and load-bearing ability,construction rapidness,bright and pithiness bridge style, so rigid frame bridge have taken an increasingly great proportion in bridges constructed and those under construction at city and county.Through the analysis and summary of the development of PC continuous rigid frame bridge and the developmental tendency of the construction control techniques for long-span prestressing PC continuous rigid frame bridge.According to its special character of the control, the paper discusses that every parameters have effect on the inner force and displacement of the structure. The paper suggests a good way of observation in the course of construction control, and establishes a monitoring system. During the construction control of SanShui Er Bridge, the system makes the basic parameters and technical parameters be acquired successfully. And through establishing computer model, the paper analyses the difference between theory and actuality, and discerns and changes parameters, Through the forward and backing analysis, the paper gives reasonable counter-camber to direct construction control of the SanShui Er bridge. And the paper provides a good way of observation in course of construction control.