膨胀土边坡失稳与防治研究

Study on Instability of Expansive Soil Slope and Its Prevention

膨胀土在我国分布较为广泛,它是一种由亲水性矿物蒙脱石与伊利石构成的高塑性土,具有多裂隙性与强胀缩性的特点,一些边坡工程在此种土质下极易造成滑坡或溜坡的问题,影响交通安全。目前国内外对于膨胀土边坡失稳问题进行了大量的研究,但效果并不理想。结合目前膨胀土边坡失稳的原因,根据不同的地质条件,确定出个性化的防治研究方案。采用柔性支挡、刚性支挡和植被防护等多种措施共同进行的方案,较为妥当,可以起到良好的稳定性作用效果。

The expansive soil is more widely distributed. It is a high plasticity soil composed of hydrophilic mineral smectite and illite, and has the multi-fissures and strong swell shrink characteristics. Some side slope projects are easy to cause slide slope or landslide in this soil, which affects the traffic safety. The instability problem of expansive soil slope is more studied at home and abroad now, but the effect is not ideal. According to the cause of expansive soil slope instability and based on the different geological conditions, the individualized preventive study scheme is determined. The scheme of using flexible retaining, rigid retaining and 5-vegetation preventive measures is more suitable, which can have the good stability effect.