摘要
采用连续介质快速拉格朗日差分分析方法,结合强度折减技术,设定解不收敛的破坏标准,来探讨抗滑桩施工过程中桩孔开挖对边坡稳定系数的影响这一三维问题。结合工程实例,模拟几种开挖顺序,结果表明合理的施工方案对边坡扰动甚微,而随意开挖桩孔可能使边坡失稳,且失稳时的位移不大,破坏征兆不明显,破坏更加突然,应特别注意。分析施工因素对边坡稳定系数的影响,特别是对处在极限状态下的边坡,十分必要。
The fast Lagrangian difference method of continua is used to analyze the effect of excavation on the safety factor of slop in slide-resistant piles construction. Strength reduction technique by setting a failure criterion-the divergence of maximum unbalance force-is also employed to study this threedimensional problem. Comparisons are made of the computed safety factors associated with different construction sequences and the most reasonable construction sequences are resulted, which is found to cause little disturbance on the slope stability. However, casual excavation for pile construction may cause slope instability with small displacements, and the slope would collapse abruptly without obvious precursors. Moreover, it is necessary to analyze the safety factor decrease caused by construction especially for slopes in critical states.
出处
《防灾减灾工程学报》
CSCD
2006年第1期73-77,共5页
Journal of Disaster Prevention and Mitigation Engineering
关键词
抗滑桩
边坡开挖掘
强度折减系数
安全系数
slide-resistant piles
slop excavation
strength reduction factor
safety factor
