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一、工程概况襄樊至十堰高速公路于2001年开工建设,2004年建成通车。路线位于汉江二、三级阶地,地貌单元为河流冲积平面和垄岗地貌。路基填料主要为弱—中膨胀土,小于0.005mm的粘粒含量一般在13.18%～49.09%,自由膨胀率32%～81%,涨缩总率-0.2%～3%。膨胀土路基填筑是本路的施工难点。
First, the project profile Xiangfan to Shiyan expressway started construction in 2001, opened to traffic in 2004. The route is located in the second and third terraces of the Hanjiang River. The geomorphic units are river alluvial plain and ridge landform. Subgrade filler is mainly weak - medium expansive soil, clay content less than 0.005mm generally 13.18% ~ 49.09%, free expansion 32% ~ 81%, the total shrinkage of -0.2% ~ 3%. Expansive soil embankment is the construction of this road filling difficulties.