西汉高速公路膨胀土堑坡浅层稳定性研究

针对西汉高速公路膨胀土地区路堑边坡浅层破坏的工程特性,提出了浆砌片石骨架+土工格室的稳定技术,详细分析了其稳定机理,给出了其设计参数和施工工艺。并对其稳定效果进行了数值分析,结果表明:浆砌片石骨架+土工格室种植土的稳定措施对坡面的应力分布的改善,表现为坡面剪应力的减小且分布更趋均匀,以及在坡脚部位剪应力集中程度的减弱;采用该稳定措施后,坡脚部位剪切方向总应变值、塑性应变区及极限塑性应变值均明显减小。最后,通过工程实例表明:浆砌片石骨架+土工格室种植土的技术不仅稳定效果要优于浆砌片石护坡的圬工工程方案,且可节约经费约8%,在保护生态环境、改善公路景观功能与旅行环境方面具有不可估量的社会综合效益。

Research on Shallow Layer Stability of Cutting Slope with Expansive Soil in Xi-Han Highway

According to the engineering characteristics of shallow layer breakage on expansive soil cutting slope in Xi-Han Highway,this paper puts forward a reinforcement technology which adds geocell in pulp-built stone tablets.Based on the analysis of its stability mechanisms,we provide its design parameter and techniques detail.The result of numerical analysis on this technology's stabilization indicates that adding geocell in pulp-built stone tablets improves stress distribution on slope,which makes the shear str...