摘要
目前设计实践中坡面锚索框架-坡脚抗滑桩边坡支护体系未考虑变形协调,支护结构存在两种防护形式先后顺序破坏的风险。通过建立坡体变形与锚索、抗滑桩变形的关系,推导了锚索+抗滑桩支护体系的变形协调公式,结合锚索和抗滑桩的变形计算方法,提出了变形协调条件下锚索-抗滑桩支护体系的设计方法。建议在下滑力无法准确确定时,应采用低刚度的锚索,并尽量设置较高的锚索预应力锁定值,保证锚索在充分发挥锚固力的同时,增强其对变形的适应能力,提高锚索框架-抗滑桩支护体系的变形协调性。
At present,the deformation compatibility is not considered in the slope support system of anchor cable frame on slope surface and anti-slide pile at slope toe in design practice.There is the risk of sequential failure of two protection forms in the supporting structure.The deformation compatibility formula of anchor cable+anti-slide pile supporting system is derived through establishing the relationship between slope deformation and deformation of anchor cable and anti-slide pile.Combined with the deformation calculation method of anchor cable and anti-slide pile,the design method of anchor cable+anti-slide pile supporting system under the condition of deformation compatibility is proposed.It is proposed that the low-stiffness anchor cable should be used and the high prestressed locking value of anchor cable is set as far as possible when the sliding force cannot be accurately determined.At the same time to guarantee the anchor cable fully to play the anchorage force,its adaptability to deformation should be enhanced,and the deformation compatibility of anchor cable frame+anti-slide pile supporting system should be improved.
出处
《城市道桥与防洪》
2024年第1期194-198,M0016,M0017,共7页
Urban Roads Bridges & Flood Control
基金
国家自然科学基金-青年项目(42007264)。
关键词
锚索框架
抗滑桩
变形协调
设计方法
anchor cable frame
anti-slide pile
deformation compatibility
design method
