In Lanzhou east the gate has a such crossroads, come when this year already full 30 years old, it is located in the Dong Gang crossroads that Lanzhou Dong Gang presses down namely. Review erst, this is born in the Dong Gang crossroads 1988, at that time also is crossroads of general formula of the first each other of Lanzhou whole town, since be born, bear is worn alleviate Lanzhou city east the heavy burden of traffic pressure. However, the Dong Gang crossroads after be open to traffic because bear the weight of for years,wear on one hand of rain of snow of hardships of a journey or of one's life and contact car grind pressure, on the other hand also the inadequacy because of building experience at that time, the technology suffers be restricted to wait for a problem, make Dong Gang crossroads uses two years many in be open to traffic in, appeared some pier sink, east abutment break expands wait for a problem. Immediately rebuilds at undertaking repairing to the part of the bridge 1990. But repair the issue with insoluble whole bridge, in the discovery in detecting of 2012, existence of main component part is short of the bridge of Dong Gang crossroads badly caustic, cannot use normally, and the security that can endanger whole bridge, be in again 2014 detect the result shows, main component part had hillock crossroads to be short of caustic greatly east, use work force badly already this to what affect bridge or affect carrying capacity, unwarrantable use normally. Bear important task however time and again " fall ill " , come 30 years for many times patch up is being maintained, but the traffic as a result of Dong Gang crossroads is big, still have among them cart interfuse rate is higher, phenomenon of freeboard, overspeed is serious, run load actually to be more than former bridge to design load, already cannot satisfy the requirement that runs load actually currently, big bridge floor is faced be badly in need of rebuilding. All previous classics Dong Gang crossroads of 30 years, renascence was greeted finally this year, demolish the job in the round at spreading out in April, in be being built now. And already had partial building, the graph was the newest progress of the Dong Gang crossroads that everybody pats recently for Xiaofang, watch understanding for everybody.