A Jointless Bridge Expansion and Contraction Device

A jointless bridge expansion and contraction device, the bridge having a first beam and a second beam, the jointless bridge expansion and contraction device disposed between an end (101) of the first beam and an end (102) of the second beam, comprising:

• a plurality of supporting blocks (1) each arranged widthwise of the bridge;
• a plurality of expansion and contraction members (2) each having a root end;
• a plurality of spring draw rods (3) each having two ends;
• wherein,
• each of the end (101) of the first beam and the end (102) of the second beam has a mounting recess (103) to mount the plurality of supporting blocks (1);
• each expansion and contraction member (2) is disposed on the plurality of supporting blocks (1) and distributed at intervals along the width of the bridge, the root end of each expansion and contraction member (2) is connected to the end (101) of the first beam or the end (102) of the second beam adjacent to the root end of the expansion and contraction member (2);
• the plurality of spring draw rods (3) with two ends is disposed on the plurality of supporting blocks (1) distributed at intervals along the width of the bridge, two ends of each spring draw rod (3) are respectively connected to the end (101) of the first beam and the end (102) of the second beam;
• the mounting recess (103) of each of the end (101) of the first beam and the end (102) of the second beam is filled with an elastic filling layer (4), and the plurality of supporting blocks (1), the plurality of expansion and contraction members (2) and the plurality of spring draw rods (3) are buried in the elastic filling layer (4).