| Since reform and opening up, China’s economy has maintained steady and rapid development trend, along with the rapid economic development of inter-regional exchanges have become more frequent, and more and more to the needs of the highway, the highway construction level and traffic has emerged as the rapid growthtrend. But some roads in the long-term use of the process, not only some of the disease, can not meet the needs of growing traffic had a negative impact on economic development, more and more road facing renovation and expansion. Road alterations widening project which the new the old roadbed differences deformation is an important issue, this paper G220Heze segment alterations widening project, for example, the use of field trials, laboratory tests, and a variety of methods, new old road base base project shape and variation of a detailed study, and the use of finite element numerical simulation method to carry out many of the new and old roadbed deformation in simple terms, the total impact of each factor of the new and old roadbed, and highway reconstruction broaden the construction for a detailed discussion. To sum up, the study include the following:First, select a representative cross-section through the geological survey, indoor soil test, a detailed analysis of the variation of the shape of the new and old roadbed foundation works. Second, through the construction of the construction program, analysis widened to broaden the impact of other factors as height, slope cutting slope ratio, bench excavation, packing nature of the new and old roadbed deformation, while considering construction disturbance, groundwater seepage and the impact of the traffic load the use of finite element numerical simulation method summarizes the influence of different factors on the new and old roadbed deformation. Third, the combination of G220converted some of the basic materials of the widening project, discusses in detail the construction process widen the embankment foundation treatment methods, the choice of filler, compaction methods and equipment selection problem and propose a new construction technology to be able to provide some help and learn from other construction. |
