高速公路富水堆积层滑坡联合支护施工技术研究

Research on Construction Technology of Combined Support for Landslide in Water-rich Accumulation Layer of Expressway

在山麓斜坡富水堆积层进行高速公路路基边坡开挖施工时,由于施工扰动,富水堆积层在土体重力和水动力共同作用下产生蠕动变形,极易发生滑坡地质灾害。针对这一特殊地质滑坡处治开展“微型钢管桩+抗滑桩+预应力锚索框格梁”的三级联合支护施工技术研究,保证施工安全。

During the excavation of highway subgrade slopes in the water-rich accumulation layer of the piedmont slope,due to construction disturbance,the water-rich accumulation layer will creep and deform under the combined action of soil gravity and hydrodynamic forces,which is prone to landslide geological disasters.For the treatment of this special geological landslide,the three-level joint support construction technology of"micro steel pipe piles+anti-slide piles+prestressed anchor cable frame beams"was carried out to ensure the safety of construction.