预应力锚索在公路边坡支护中的应用研究

在山岭重丘区高速公路的施工中,路堑边坡较高,土石方开挖方量大,在坡体岩层松散、破碎、地质条件较差的地段,高边坡的开挖扰动破坏了原地层结构,开挖边坡将坡体天然支挡部位切掉,对边坡的稳定性造成了破坏,容易引发山体滑坡、岩塌等地质灾害,直接影响高速公路的施工及运营安全。采用预应力锚索对高边坡进行支挡防护施工,并对防排水进行综合治理,是当前在路基高边坡设计或施工中普遍采用的边坡治理方案。

Application of Prestressed Anchor Cable in Highway Slope Supporting

In the construction of expressway in mountainous area,cutting slope is comparatively high,and the volume of excavation earthwork is huge.At the segment with incompact or broken slope terrane and bad geological conditions,the excavation of high slope destroys the structure of original stratum,and cuts the natural supporting position of slope body,which destroys the stability of slope and induces landslide,rock collapse and other geologic hazards.It directly impacts the construction and safe operation of expressway.It is a prevalent scheme for slope treatment in the design or construction of high slope of subgrade at present that using prestressed anchor cable to implement the supporting construction of high slope and the comprehensive treatment of drainage.