用顶推法施工的连续梁桥,在顶推过程中,由于支座下沉或超顶,对梁的内力和支座反力都会产生影响。我们知道,一般连续梁的计算简图均取理想的铰支承,其特点是这种支承既能承受压力(正反力)也能承受拉力(负反力)。而顶推施工连续梁的支承滑道则只能承受正反力,不能承受负反力。所以,用一般的理想铰支承的计算简图来分 The continuous beam bridge constructed by push-in method will affect the internal force of the beam and the reaction force of the support due to the sinking or overturning of the support during the push-in process. We know that the calculation of the general continuous beam are taken ideal hinged bearing, which is characterized by this support can withstand both pressure (positive and negative) and can withstand the tension (negative reaction). However, the supporting slideways that push the continuous beam of the construction project can only bear the positive and negative forces and can not bear the negative reaction force. Therefore, with the general ideal hinge support calculation diagram to points