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目前．沉管挤密碎石桩已广泛用于加固地基．但在软土地区应用时其复合地基的承载力较低，通过充水预压可使复合地基承载力进一步提高．可拓宽挤密碎石桩的应用范围。结合工程实例说明其加固效果。
Currently. 3. Immersion tube compacted stone piles have been widely used to reinforce foundations. However, when the composite foundation is applied in soft soil, the bearing capacity of the composite foundation is low, and the bearing capacity of the composite foundation can be further improved by preloading with water. Can broaden the scope of application of compacted stone columns. Combined with engineering examples illustrate its reinforcement effect.