土工格栅加筋陡边坡路堤位移特性的试验研究

为了解土工格栅加筋陡边坡路堤的位移特性,通过离心模型试验和土工格栅应变的现场观测进行了研究.获得了土工格栅加筋路堤横断面位移分布和路堤中土工格栅应变随时间变化的情况,发现在边坡坡脚浸水的情况下,加筋模型有绕边坡坡脚倾覆的趋势,倾覆趋势随加筋密度的增大和边坡坡度的增大而增大,而不加筋路堤边坡发生了滑塌,表明土工格栅的加入提高了路堤的整体性.在边坡坡脚浸水的情况下,地基土体在边坡坡脚附近的推移以及在路堤下部的沉降是路堤破坏的主要原因,有无加筋、加筋密度和边坡坡度对地基土体位移的分布特性影响不大.

Research on Displacement Characteristics of Geogrid Reinforced Embankment with Steep Slope

In order to learn the displacement characteristics of geogrid reinforced embankment with steep slope, according to centrifuge model test and long term in situ observation of geogrid strain, displacement distribution on embankment sections and geogrid strain trends were obtained. It was discovered that reinforced embankments had overturn trends after watered and the trends aggravated when the geogrid space was reduced or the slope was steepened, while slope of the embankment without geogrid was failure in the same conditions. It shows that the interior stabilities of embankments are increased by geogrid; horizontal displacement of foundation near slope toe and settlement of foundation under embankment are main failure reasons and whether embankment is reinforced or not, spacing of geogrid and grade of slope have no influence on displacement distribution characteristics of foundation.