摘要：随着平原区高速公路网的日臻完善．越来越多的高速公路建设向山岭区延伸。受山岭区地形条件的影响．以及在高速公路线形、纵坡等方面的严格控制．山区高速公路路基不可避免的出现深挖高填。其中，深路堑往往具有点多、面广和线长的特点，
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