Study on Anchorage BIock Crack Treatment of Steal Tubular Arch of Qinggan River Bridge Liu Changhang Yang QihaiThe steel tubular arch truss articulations of Qinggan River bridge were fastened and connected by cableway crane with cable-stayed cantilever. But crack appeared on hind anchorage block when the tenth articulation was suspending. Based on the study of the cause, some treatment means such as pre-stressing steady upward force, weighting and pressing with superim- posed load were taken, the steel tubular arch was at last connected successfully. It proves that the treatment means are available and worth studying. steel tubular arch; suspending placement; cableway crane; anchorage block crack; problem study; treat- ment