边坡防护中排架微型桩组合结构受力研究  

Analysis of Mechanical Behavior of Row Micro-pile Composite Structure on Slope Protection

作　　者：徐小林[1,2] 王全才[1] 王浩[1,2] 吴清[1,2] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [2]中国科学院研究生院,北京100049

出　　处：《水电能源科学》2012年第9期99-102,共4页Water Resources and Power

摘　　要：弹性地基梁理论应用的基本条件是土体为稳定体,且排架微型桩组合结构对不稳定坡体有改善作用。在弹性地基梁理论基础上,借鉴一般微型桩水平承载力的计算思路,以拟静力法计算施加地震荷载,在考虑桩土作用的情况下,以四种基本计算模型建立排架微型桩组合结构的计算公式,并通过实例计算探讨了排架微型桩组合结构的内力及对地震力的特殊反应。结果表明,排架微型桩组合结构中,后排桩的存在为前排桩提供了一个稳定的抵抗滑坡推力的条件,同时连系梁的存在将桩与桩间土体组合在一起,充分发挥了土体的抗剪能力,提高了结构的抗滑能力,削弱了地震力对边坡稳定的影响,提高了工程的安全性。The basic requirement of the application of elastic foundation-beam theory is that the foundation should be stable and the row micro-pile composite structure can improve the stability of slope. According to the calculation of hori- zontal bearing capacity of micro-pile, pseudo-static method is adopted to calculate earthquake load on the basis of elastic foundation-beam theory. Considering the action of pile soil, the formulas of row micro-pile composite structure are estab- lished with four basic calculation models. The internal force of row micro-pile composite structure and its special response to seismic force are discussed with practical case. The results show that the presence of back row piles provides a stable environment for front row piles on resisting the landslide thrust; piles and soil combined through the tie beam, which gives fully play to the soil shear capacity and improves anti-sliding; the impact of seismic force on slope stabilization is weakened and it improves engineering safety.

关 键 词：边坡 弹性地基梁 地震荷载 微型桩 桩土相互作用 组合结构 

分 类 号：TU473.12[建筑科学—结构工程]