There are much soft soil in the Zhujiang Delta ,which is comprehensive material composed of fine-grained soil ,organic content and mineral substance deposited in the saline water or fresh water. Muck and mucky soil on the top which represent the soft soil are high water content ,high void ratio ,low strength ,underconsolidated ,high compressibility and easy thixotropy, whose engineering properties are very poor. Mechanical tests indicate that soft soil have high strength .When high-way is constructed on the...