水泥土挤密桩加固黄土隧道地基的稳定性研究

Stability Research of Loess Tunnel Subsoil Reinforced by Cement Soil Compaction Piles

以郑西客运专线淹池至灵宝段盘东隧道为研究对象,对用水泥土挤密桩加固后的隧道地基在高速列车荷载作用下的沉降进行有限元分析,研究地下水、水泥土挤密桩加固对黄土隧道地基稳定性的影响。结果表明:在大断面黄土隧道中,水泥土挤密桩对控制黄土隧道地基沉降作用明显,尤其在富水条件下。研究结果可为水泥土挤密桩在黄土隧道地基加固中的应用提供科学指导。

Taking the Pandong tunnel of Yanchi to Lingbao section in Zhengzhou-Xi＇an passenger dedicated line as the research object, the finite element analysis for the settlement of tunnel subsoil reinforced by cement soil compaction pile under the action of high speed train load was made, and the influence of groundwater and cement soil compaction pile reinforcement on loess tunnel subsoil stability was studied. The results show that the cement soil compaction pile has obvious effect on controlling the settlement of loess tunnel subsoil in large section loess tunnel, especially cement so in water-rich conditions. The research results could provide the scientific guidance for the application of il compaction pile in the loess tunnel subsoil reinforcement.