预应力锚固作用下破碎岩质边坡表层压缩效应  

Surface compress effects of crush rock slope under prestressed cables anchorage forces

作　　者：吕庆[1] 孙红月[1] 尚岳全[1] 朱晗迓[1] 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2006年第12期2168-2173,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(40372118)

摘　　要：为研究预应力锚固作用下破碎岩质边坡的压缩效应及其对加固工程的影响，对金丽温高速公路某边坡锚固工程进行了现场监测和数值模拟研究．研究了不同的预应力锚固结构作用下，在不同弹性模量的破碎岩质边坡中产生的压缩变形和附加应力变化规律．讨论了预应力锚索间距和框格梁梁高对坡体表面压缩效应的影响．结果表明，考虑到坡体岩体变形模量小，破碎岩质边坡锚固工程宜采用500～750kN的小吨位预应力锚索．应尽量采用带框格梁的锚固结构形式，锚索间距可取4～6m．框格梁梁高取锚索间距的1／10左右是最为经济安全．To study the surface compression effects of the crush rock slope under prestressed cables anchorage forces and their influence on reinforced slope stability, site monitoring and numerical simulation studies were carried out on a slope reinforced by prestressed cables in Jin-li-wen highway. The slope surface compression deformation and subsidiary stresses change rules with different elastic modulus of crush rock slope under different prestressed anchorage structures were investigated. The influence of different prestressed cables intervals and different frame beam depths on slope compression effects was discussed. The results show that light-tonnage cables of 500～750 kN are proper in crush rock slope anchorage engineering considering the low elastic modulus of the slope. The anchorage structures with frame beam is suitable for crush rock slope anchorage engineering, and the interval of cables being 4～6 m is proper. The depth of frame beams can adopt about 1/10 of the cables interval for reasonable engineering cost and safety.

关 键 词：破碎岩质边坡 滑坡加固 预应力锚索 数值模拟 

分 类 号：TU457[建筑科学—岩土工程]