铜黄高速公路常家河特大桥高墩大跨度预应力混凝土连续刚构工程,由于工期远远滞后,在高于设计温度12℃的条件下,对全桥4个合龙口实施了一次合龙。通过对高温条件下一次合龙的施工设计计算,工程采取了换算弹性模量及多点连续顶推措施,取得了良好效果。 Long-span prestressed concrete continuous rigid-frame construction of Changjiahe Grand Bridge of Tong-Huang Expressway, due to the long-term deadline, carried out a co-operation on 4 coalescence ports of the whole bridge at a temperature higher than the design temperature of 12 ℃. Through the design and construction of a construction project under the condition of high temperature, the project has taken the measures of elastic modulus conversion and multi-point continuous thrusting and has achieved good results.