Abstract
A new method of widening mountainous highway with T-shaped Integer Cantilevered Road was proposed for steep mountainous areas. Its design principle is casting an integral wall upon the exiting stable roadbed to widen the road without considerable cut and fill. Then the construction technique and work principle were introduced, and the technical, economic and environmental benefits were discussed. Engineering application shows that this method is not only simple, economical, and on the safe side in construction, but also protecting environment further compared with the existing techniques.
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