菜园坝长江大桥荷载试验中的全桥线形测量

Full-bridge alignment measuring for Caiyuanba Yangtze river bridge loading test

对于大跨径桥梁而言,在荷载试验中获得全桥的线形具有很重要的意义。为了突破全站仪无法获得全桥所有测点挠度数据的缺陷,采用测量精度为毫米级的连通管法挠度监测系统来实现桥梁挠度的多点同步测量,从而获得全桥的相对线形;通过菜园坝长江大桥的荷载试验,结果证明了系统的正确、可行性。

It is very important to acquire deflection of full-bridge alignment in large span bridge load test. In order to overcome the defect that Total Station can not obtain the deflection of full-bridge alignment, the connecting pipe principle deflection measurement system is adopted to implement multi-point measurements. As been demonstrated a resuh, bridge the effectiveness alignment is gained. Caiyuanba Yangtze River Bridge load test of the proposed method synchronous results have