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宜昌城区防洪护岸工程属长江护岸工程,采用墙坡结合的护岸型式,在长江枯水岸边建有一级高5.5～7.5米重力式浆砌石挡土墙,局部挡土墙基础位于粉细砂层,地基承载不足。经研究认为垫层法处理软弱基础具有造价低、施工方便、速度快、质量易于控制等优点,该基础经采用垫层法处理后,挡土墙安全稳定得到了有效保证。
Yichang urban flood control and revetment project belongs to the Yangtze River bank protection project, using a combination of wall and bank revetment type, built in the Yangtze River dry water level 5.5 ~ 7.5 m gravity type masonry retaining wall, the local retaining wall foundation located in fine sand Layer, foundation bearing insufficient. The research shows that the cushion method has the advantages of low cost, convenient construction, fast speed and easy quality control. The foundation is treated by cushion method, and the security and stability of the retaining wall is effectively guaranteed.