| 摘要 |
PROBLEM TO BE SOLVED: To provide installation structure of a bridge bearing device and an installation method capable of easily carrying out work for installing an elastic bearing body to a lower structure, at the same time, acting on an anchor bolt while buffering lateral, abrupt and large impact force and shear force caused by horizontal movement by means of a cylindrical member or a cylindrical impact absorption member and preventing the anchor bolt from large impact force abruptly acting thereon. SOLUTION: This structure is so constituted that an anchor bolt 9 is inserted into an anchor bolt insertion hole 13 of a base plate 5 in an elastic bearing device and that a bridge elastic bearing device is fixed to a lower structure 2 with the anchor bolt 9. In that case, the inside diameter of an anchor bolt insertion hole 1 in the base plate 5 is so formed that it is larger than an outside diameter of a vertical intermediate section of the anchor bolt 9 inserted from an upper side of the anchor bolt insertion hole 13 and embedded in the lower structure 2 to fix, the cylindrical impact absorption member attached anchor bolt 9 fitting and interlocking a cylindrical impact absorption member 10 is inserted into the anchor bolt insertion hole 1 of the base plate 5 and, at the same time, the circumferential surface of the cylindrical impact absorption member 10 is so placed that it approaches the inside circumferential surface of the anchor bolt insertion hole 1 to oppose them.
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