水泥土搅拌桩在城市道路软土地基的应用

简要分析了软土地基的特点和危害，并介绍了软土地基处置的原则及必要性；基于实际工程案例，研究了水泥土搅拌桩在城市道路软土地基中的运用效果，并分别计算和分析了3种设定工况下不同路堤填土高度的路基工后沉降值（路中）以及工后沉降规律。通过总结发现：在一定条件下，与普通水泥土搅拌桩复合地基处理方法相比，长桩+短桩形式的水泥土搅拌桩复合地基处理方法更为有效，它不仅能提高地基承载能力，而且能减小路基工后沉降，压缩工期，取得预期效果。

Application of Cement Soil Mixing Piles in Weak Soil Foundation of Urban Road

The characteristics and harm of weak soil are briefly analyzed, and the principles and necessity of weak soil foundation disposition are introduced. Based on the practical engineering cases, the application effect of cement soil mixing piles in weak soil foundation of urban road is studied. The post-construction settlement values (road center) and the post-construction settlement rules of subgrade with the different heights of embankment fill under the three setup construction conditions are calculated and analyzed respectively. The conclusion shows that under some conditions, compared with the common cement soil mixing pile composite foundation treatment method, the long-pile + short-pile type of cement soil mixing pile composite foundation treatment method is more effective, which can not only improve the bearing capacity of the foundation, but also reduce the post-construction settlement of the subgrade and shorten the construction period. And the expected effect is achieved and there are some referring values.