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依托三亚隧道穿越全风化石英岩富水软弱地层工程,对该地层条件下隧道的施工技术进行研究。针对现场采用的水平旋喷桩预加固方案,通过力学参数试验掌握了旋喷桩体的物理力学特性,并建立了三维数值分析模型,对水平旋喷预加固的效果及加固后所采用的施工方法进行了比选分析。计算结果表明:采用水平旋喷预加固结合CRD法能够较好适应该地层条件下的隧道开挖。现场应用良好,可供类似工程参考。
Relying on Sanya tunnel through fully weathered quartzite water-rich and weak strata project, the tunnel conditions under the conditions of construction technology research. According to the pre-reinforcement scheme of horizontal jet grouting pile adopted in the field, the physical and mechanical characteristics of the jet grouted pile are grasped through the mechanical parameter test, and the three-dimensional numerical analysis model is established. The effect of horizontal jet grouting pre-reinforcement and the construction after reinforcement Methods were compared analysis. The calculation results show that the tunnel excavation under the condition of formation can be well adapted by the horizontal rotary jet pre-consolidation combined with CRD method. Field application is good, for similar projects.