The ground stratum is quite complex, with silt layer and fine sand layer mixed, so the construction is difficult to be carried out and the requirement of pit support is strict.
基坑所处地层十分复杂，有较厚的淤泥层和细砂层，基坑支护要求高，施工难度大。
The method for making judgment to the optimal tamp number of foundation, which have silt and sand layer as well as have clay, were analyzed.
对既有砂性土又有粘性土地基的点夯最佳夯击击数的确定方法进行了分析；
By analyzing the settlement observed data in construction and running period of Jie-Pu Expressway, it shows that sand wick is reasonable and necessary for treating rotten wood and silt mixed layer.
通过分析揭普高速公路软基路堤施工期及运行期的实测沉降资料，结合成因环境，说明了采用袋装砂井进行深层处理含腐木软土地基的合理性及必要性。
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