大厚度黄土场地双索联合板索基础抗拔

Study on Pulling Resistance of Double Anchor Cable Combined Plate Foundation

"大开挖"基础、"掏挖扩底"基础、"爆扩桩"基础为现今主要既抗压又抗拔基础,针对3种基础型式存在的缺陷和不足,构建了双索联合板索基础并且获得了发明专利授权,该基础的上板主要承受下压力和水平力,两锚板承担上拔力.论文深入系统地分析研究了双索联合板索基础两锚板间距对极限抗拔力、锚板和土体位移、土体的剪应变、土中塑性区和破坏面的影响,结合与单索联合板索基础进行对比分析,揭示了双索联合板索基础的抗拔机理及其抗拔力、土体位移、土体剪应变、土体塑性区的演化规律,为该基础型式的设计和施工提供了支撑.

Large excavation foundation,digging belled pile foundation and explosive-enlarged pile foundation are present primarily used foundations that are both pulling resistant and compressing resistant.Focusing on the deficiencies of the three foundations,the double anchor cable combined plate foundation was constructed and authorized by the invention patent.The upper plate of the foundation mainly bears the downward pressure and horizontal force,and the two anchor plates bear the uplift force.The influence of the distance between two anchor plates on the ultimate uplift capacity of the double anchor cable combined plate foundation,displacement of anchor plate and soil,shear strain of soil,plastic zone and failure surface were analyzed systematically.By comparing with the single anchor cable connected anchor plate foundation,the uplift mechanism of the double anchor cable combined plate foundation and its uplift bearing capacity,displacement of soil,shear strain of soil and evolution law of plastic zone of soil were revealed,which provided support for the design and construction of the foundation type.