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通过对广西某高速公路改扩建边坡工程施工过程稳定性进行数值分析,得到了边坡二次开挖过程中的安全系数及应力应变、位移场的变化规律。结果表明:该工程中采用的桩锚支护结构体系起到了明显的加固效果,有效避免了土体大量开挖破坏公路周边自然环境;二次开挖过程中边坡安全系数符合相关规范要求,应力应变都在合理范围内,边坡处于稳定状态。边坡稳定性分析结果表明该边坡加固设计方案合理可靠。
Through the numerical analysis of the construction process stability of a highway reconstruction in Guangxi, the safety factor, stress and strain field and displacement field during secondary excavation are obtained. The results show that the pile-anchor supporting system used in this project has obvious reinforcement effect, effectively avoiding the massive excavation of the soil and damaging the natural environment around the highway; the safety factor of slope in the secondary excavation meets the requirements of relevant specifications, Stress and strain are within a reasonable range, the slope is in a stable state. The slope stability analysis results show that the slope reinforcement design is reasonable and reliable.