高速公路路基拓宽中的软土地基处理技术

Soft Soil Foundation Treatment Technology in the Widening of Expressway Subgrade

为了减少软土地区高速公路拓宽项目的病害,分析了软基沉降计算理论及换土垫层法、铺土工格栅、采用轻质填料、水泥搅拌桩、预应力混凝土管桩等软基处治措施的特点和适用范围,并以某高速公路拓宽项目为研究对象,分析了水泥搅拌桩处治前后,新老路基间的不均匀沉降,以评价其处治效果。

In order to reduce the disease of highway widening project in soft soil area,this paper analyzes the characteristics and application range of soft foundation settlement calculation theory and soft foundation treatment measures,such as soil changing cushion method,geogrid laying,lightweight filling,cement mixing pile,prestressed concrete pipe pile,etc..Taking a freeway widening project as the research object,the uneven settlement between the old and new roadbed before and after the treatment of cement mixing pile is analyzed to evaluate the treatment effect.