| Widening of urban road is an availability method to increase the traffic quantity, not only it can solve the recent financial difficulties efficiently, but also satisfied the needs of soaring traffic. In this paper, the usual defects among the many road widening projects is analysed, and then, the reason is found out for the breakage of road surface fabric which infected by the asynchronous distortion and the asymmetry of settlement of new and old roadbed, and expatiate the approaches of working out these diseases. The asymmetry of settlement of new and old roadbed is analysed, then, the control criterions of settlement of roadbed are estabilished. The interaction between new and old roadbed and treatment techniques are systematically researched. Last, the checing and analyzing for widening of the renmin road in changzhou jiangsu are completed. |
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