摘要
大型滑坡灾害建议采用预应力锚索＋h型抗滑桩进行处置。在分析h型抗滑桩工程处置特点基础上,探讨了预应力锚索＋h型抗滑桩设计参数的取值原则,建议排距取3～5倍桩径,锚固深度取桩长的1/3～1/2,横梁刚度取桩基刚度的1.0～2.0倍,悬臂段取后排桩长的1/4,列距取桩径的2.5～3.5倍;通过分析预应力锚索＋h型抗滑桩受荷变形模式,提出采用平面刚架模型计算阻滑段内力,采用单桩设计理论计算锚固段内力,进而建立了预应力锚索＋h型抗滑桩内力简化计算方法,确定了相关参数计算方法。三凯高速王家寨滑坡工程实例分析表明本文所提出的预应力锚索＋h型抗滑桩内力简化计算方法能够满足工程建设要求,结果偏安全。
The anti-sliding pile of h-type with pre-stressed anchor cable is firstly proposed to deal with a large landslide. In order to study the analysis method of the anti-sliding pile of h-type with pre-stressed anchor cable,the engineering features of anti-slide pile of h-type are examined and the methods to obtain the design parameters are discussed. The row spacing of the anti-sliding piles is proposed to take three to five times the pile diameter. The anchoring depth of the anti-sliding piles is proposed to take one third to half the pile length. The beam stiffness is proposed to take one to two times the pile stiffness. The length of cantilever part is proposed to take one fourth the back pile length. The column spacing of anti-sliding piles is proposed to take2. 5 to 3. 5 times the pile diameter. The deformation process of the anti-sliding pile of h-type with pre-stressed anchor cable under the load is analyzed. The plane rigid frame model is proposed to calculate the internal force of sliding section and the single pile design theory is used to calculate the internal force of the anchorage segment. The simplified method is presented to calculate the internal force of the anti-sliding pile of h-type with pre-stressed anchor cable. The methods to decide the calculation parameters are also suggested. The analysis results of the Wangjiazhai landslide in the Sankai highway show that the method proposed in this paper satisfies the requirements of engineering construction,and the engineering is safe.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2014年第5期57-63,共7页
Hydrogeology & Engineering Geology
基金
国家自然科学基金(51208063
51178063)
湖南省教育厅科技项目
桥梁工程安全控制省部共建教育部重点实验室(长沙理工大学)开放基金(12KB03)
关键词
h型抗滑桩
预应力锚索
坡体抗力
平面刚架
结构内力
anti-sliding pile of h-type with pre-stressed anchor cables
slope pressure
plane rigid frame
internal force
