季节冻土区几种典型分散土边坡冻害防护技术研究

Study on Preventive Technology of Frost Damage on Dispersive Soil Slope in Seasonal Frozen Area

在季节冻土区,分散土边坡由于受到冻胀、融沉的影响,极易发生冻胀变形与融沉破坏,随着分散土表面雨水冲蚀沟的形成,水分逐渐富集与入渗坡体内部,使得土坡内部的沟缝逐渐加深,破坏加大,随着冻胀变形的持续发展,边坡的整体稳定性越来越差,造成分散土边坡工程修复难、维修成本高。文章针对季节冻土区分散土边坡特有的破坏形式与冻胀特点,力求削减寒区分散土边坡的冻害程度,研究不同结构形式、种类的冻害防护技术,为实际工程服务。

Dispersive soil slope is easy to be deformed and damaged due to influence from the frost heave and thaw settlement in the seasonal frozen soil area. With the formation of ditch eroded by rain on the surface of dispersive soil, water enriched gradually and infiltrated into the slop body, which deepened gradually the gap between slopes, and damages were worsening. The overall stability of the slope is more and more worsened with the sustainable development of frost heave deformation, resulting in difficulty to rehabilitee the dispersive soil slope engineering and high cost for rehabilitation. In line with the damaged type and frost characteristics of dispersive soil slope in the seasonal frost area, this paper studied prevention technology against various structures and kinds in order to reduce the frost degree of dispersive soil slope in cold area, so as to serve for actual projects.