Arrangement method of supports of continuous box girder bridge

The invention relates to a planar arrangement method of supports of a continuous box girder bridge. The planar arrangement method comprises the following steps: calculating anti-thrust rigidities at the tops of bridge piers according to the geological conditions at the positions of the bridge piers and the lower structures of the bridge piers, calculating a stationary point (S.P.) of a box girderaccording to the anti-thrust rigidity of each pier, calculating horizontal force at the top of each pier according to constant-load support reaction force R at the top of each bridge pier, calculating the maximum horizontal displacement at the top of each bridge pier when the supports slide, calculating shrinkage deformation amount of each bridge pier, arranging a fixed support at the bridge pierwhich is closest to the stationary point (S.P.), if the other bridge piers meet the condition, arranging fixed support saddles at the other bridge piers; otherwise, arranging one-way sliding supports. According to the method d