振冲置换法在长江护岸地基处理中的应用

为解决长江高填方护岸深厚覆盖层地基的抗滑稳定问题,采用振冲置换法对地基进行加固处理。计算分析表明,振冲碎石桩处理范围、桩间距、桩长等参数应结合地形、地质条件进行设计,振冲置换法与其他地基处理方式进行有机结合能够取得更好的处理效果;护岸地基通过振冲置换处理后,抗滑稳定性能够满足规范要求。采用振冲碎石桩对软弱地基进行置换形成复合地基,能够有效解决地基砂土液化问题、承载力问题及抗剪强度问题。

Application of vibro-replacement method in foundation treatment for Yangtze River revetment

In order to solve the anti-sliding stability problem of the high-fill revetment along the Yangzte River, the vibro-replacement method was used to treat the deep overburden foundation of high-fill revetment. The results show that the design of the range of vibration stone columns, pile spacing, and pile length should be matched with the terrain and geological conditions. The vibro-substitution method combined with other foundation treatment methods can achieve better treatment effects. Through vibro-replacement, the anti-sliding stability of the revetment can meet the requirements of specifications. Using the vibration stone column to replace the soft foundation replacement to form a composite foundation, the problems of sand liquefaction, bearing capacity, and shear strength of the foundation can be solved effectively.