There is no enough soil for subgrade reclamation of Maoming-Zhanjiang Expressway inTongcheng-Sanya National Trunk Highway because the soil resources nearby are mainly high liquid limit soil, which makes the borrow very difficult.

• 同三国道茂湛高速公路路基填筑土源相当匮乏 ,附近土源多为高液限土 ,取土十分困难 ;