考虑滑坡岩土体弹性抗力预应力锚索抗滑桩设计方法  

Design of Prestressed Anchor Pile with Consideration of the Reaction Force of the Soil Mass

作　　者：李德营[1] 殷坤龙[2] 陈丽霞[2] 王磊[1] 

机构地区：[1]中国地质大学研究生院,武汉430074 [2]中国地质大学工程学院,武汉430074

出　　处：《地质科技情报》2008年第6期107-110,共4页Geological Science and Technology Information

基　　金：教育部博士点基金项目(20030491004)

摘　　要：在目前预应力锚索抗滑桩的计算方法中,均没有考虑桩后岩土体受到锚索预应力作用产生的弹性抗力对滑坡推力的影响。初步探讨了桩后岩土体上产生的预加固力的分布形式。考虑了锚索桩的荷载变化,根据桩与锚索变形协调原理,按长期荷载进行锚索预应力设计;然后按短期荷载确定滑坡最大推力,并用预加固力修正滑坡推力,而对锚索设计拉力与桩的内力则按修正的滑坡最大推力设计,这样的设计思路反映了预应力锚索抗滑桩实际受力的特点。结合重庆某滑坡的工程实例,与常规方法进行了对比分析。The influence of the reaction force of the unstable soil mass from the piles on the lateral force is not considered in the current design of prestressed anchor pile. Taking into account that the pre-stress of the anchor affects pre-reinforcement of the soil mass, the paper discusses the distribution of pre-reinforcement force of the soil mass. Based on deformation consistence between the pile and anchor, the pre-reinforcement force of the anchor is introduced into the design method. As the change of lateral sliding force acts on the pile, the prestressed force of the anchor should be calculated according to the long time load, while the effect of the short time load should be considered in the bearing capacity design of the anchor and pile. The paper also compares this method with the conventional method with an actual project in Chongqing.

关 键 词：预应力锚索抗滑桩 预加固力 变形协调 

分 类 号：TU473.12[建筑科学—结构工程]