基于微型桩群加固土质边坡试验设计分析基于微型桩群加固土质边坡试验设计分析 摘要:微型桩( micropiles) 是在 20 世纪 50 年代由意大利的 Lizzi 首次提出的,又称树根桩或迷你桩,一般指桩径在 90~300 mm,长度与直径比较大(一般大于 30),采纳钻孔、注浆工艺施工的灌注桩或插入桩。微型桩早期主要用于基础托换、建筑物加固等; 由于其符合滑坡防治工程向轻型化、小型化方向进展的趋势,20 世纪 80 年代后进展应用于边坡加固、滑坡治理和深基坑支护等工程。在边坡预加固、滑坡治理中,微型桩由于施工方便迅速、桩位布置灵活、对滑坡体扰动小等优点而得到了广泛应用。 关键词:边坡; 微型桩群;试验设计;离心模型试验 Abstract: Miniature pile ( micropiles) is in the nineteen fifties by Italy Lizzi is proposed for the first time, also called root pile or mini pile, generally refers to the pile diameter in 90 ~ 300 mm, length and diameter is relatively large ( more than 30 ), the use of drilling, grouting construction pile or pile into. Micro pile foundation underpinning, early is mainly used for building reinforcement; due to its consistent with the landslide control project to the development of lightweight, miniaturization trend, the development and application of nineteen eighties in slope reinforcement, slope and deep foundation pit engineering. In slope reinforcement, landslide, micro pile because of convenient and rapid construction, pile layout is flexible, landslide disturbance of small advantages and has been widely applied. Keywords: slope; micropile groups; experimental design; centrifugal model test 中图分类号:O212.6 文献标识码:A 文章编号: 近年来,国内外学者和工程技术人员对微型桩的讨论成果较多。关于微型桩在水平荷载作用下性状的讨论与加固边坡或滑坡的微型桩( 群)的受力特点不同; 微型桩的设计计算的讨论缺乏有效的试验验证; 地质力学模拟试验或施加水平荷载来模拟滑坡推力的微型桩试验讨论则考虑重力场的影响的程度不够。因此,为了直观地反映出滑坡推力作用下微型...