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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。
In view of the engineering characteristics of the shallow damage of the cutting slope in the expansive soil area of the Western Han Expressway, the stability technology of the mortar-lamellar slab + geocell is proposed. The stability mechanism is analyzed in detail and the design parameters and construction technology are given. The results show that the stabilizing measures for the soil planted by the mortar-lamellar stone + geocell improve the stress distribution of the slope, which shows that the shear stress on the slope decreases and the distribution becomes more uniform, As well as the weakening of the concentration of shear stress at the slope foot. After this stabilization measure, the total strain, the plastic strain region and the ultimate plastic strain in the shear direction of the slope foot part obviously decrease. Finally, the engineering examples show that the technology of milled stone slab + geocell planting soil is not only stable, but also can save about 8% of the cost, in protecting the ecological environment and improving the road Landscape function and travel environment has immeasurable social comprehensive benefits.