摘要
为了研究抗滑桩对边坡的加固效果,采用极限分析上限法,构建了抗滑桩加固的三维裂缝边坡旋转破坏模式,并在假定桩间土体处于塑性极限状态下,推导出抗滑桩侧向抗力的功率表达式,计算出抗滑桩在不同加固位置和加固密度条件下三维裂缝边坡的安全系数.研究结果表明,抗滑桩加固有效减小了裂缝最大深度,显著提升了边坡稳定性;裂缝边坡的安全系数与最大裂缝深度之间存在明显的负相关关系,最大裂缝深度可以作为一个判断边坡对天然裂缝敏感度的有效指标;随着抗滑桩的位置从坡脚移动到坡肩,边坡的安全系数先增加后减小并呈现明显的单峰性.
Cracks are a common disease affecting slope stability,in engineering,anti-slip piles are often used to reinforce the slopes for improvement of the stability of cracked slopes.A three-dimensional cracked slope rotational failure mechanism with anti-slip pile reinforcement is constructed in this paper,and the power expression of anti-slip pile lateral resistance is derived based on the assumption of the plastic state of soil between piles,and the safety factor of three-dimensional cracked slopes with different reinforcement locations and reinforcement density of anti-slip piles is calculated.Parametric studies imply that the anti-slip pile reinforcement measures can effectively reduce the maximum depth of cracks and significantly improves the stability of the slope.There is a significant negative correlation between the safety coefficient of cracked slopes and the maximum depth of cracks,which can be used as an effective indicator to determine the sensitivity of slopes to natural cracks.As the position of anti-slip piles moves from the slope toe to the slope crest,the safety factor of slopes first increases and then decreases,showing a significant unimodal behavior.
作者
盛宴
李嘉
SHENG Yan;LI Jia(Shenzhen Tianjian Pingshan Construction Engineering Co.Ltd.,Shenzhen 518118,Guangdong China)
出处
《吉首大学学报（自然科学版）》
CAS
2023年第4期47-54,共8页
Journal of Jishou University(Natural Sciences Edition)
关键词
抗滑桩
裂缝
三维边坡
稳定性
anti-slip pile
cracking
three-dimensional slope
stability
