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以庄盖高速公路K56+356处岩质边坡处理工程为依托,充分考虑渗流作用,利用建模软件(PGEN)和离散元软件(3DEC)建立真实的岩质边坡三维数值模型,分析各阶梯开挖后岩质边坡的稳定性,结合自编的slope consolidate软件计算锚固力和锚杆数量。分析结果表明:在不采取任何支护措施的情况下,边坡开挖到第四阶梯时,整体沉降量较小,边坡稳定性保持较好。继续开挖,部分块体将发生剥落、滑移等现象,最终导致边坡整体失稳破坏。为了保证工程的正常进行,提出在第四阶梯开挖完成后对边坡进行锚杆加固,在第五阶梯、第六阶梯边开挖边支护的加固方案。
Relying on the treatment of rock slope at K56 + 356 of Zhuangai Highway, the three-dimensional numerical model of rock slope is established by using the modeling software (PGEN) and discrete element software (3DEC) Stability of rock slope after step excavation, combined with self-compiled slope consolidate software to calculate anchoring force and bolt number. The analysis results show that without any support measures, when the slope is excavated to the fourth step, the overall settlement is small and the stability of the slope remains good. Continued excavation, part of the block will occur spalling, slippage and other phenomena, eventually leading to the entire slope instability damage. In order to ensure the normal progress of the project, it is proposed to reinforce the slope after the completion of the fourth ladder excavation, and to reinforce the support in the fifth and sixth steps of excavation.