【摘要】 微型桩群在滑坡防治方面具有独特的优势,已被广泛用于工程实践中。首先,根据前人的室内模型试验和现场原位试验成果,阐述影响微型桩群抗滑性能发挥的各种因素,如桩顶约束形式、桩身配筋方式、桩间距、锚固长度、土的含水率等,并从桩-土相互作用的角度总结微型桩侧土压力分布的机理,进而确定桩身内力,且根据刚度的不同归纳微型桩的受弯破坏和弯剪破坏的破坏形式;其次,介绍了微型桩群的抗剪强度法、弹性地基梁法、p-y曲线法等方法,指出其优缺点;最后,提出了目前微型桩群理论研究与试验研究方法的不足,尤其在降雨条件下、地震等作用下的研究很少,并提出一些建议。更多还原

【Abstract】 The micro-pile groups have extraordinary superiority in the prevention and treatment of landslides,which have been widely put into use for practice.Firstly,according to previous achievements of laboratory experiments and in-situ tests,a series of factors influencing skid resistance of the micro-pile groups have been illustrated,such as joint form in the pile top,form of the reinforcing bars in the pile shaft,space between piles,and anchoring length,moisture content of soil,etc.,in addition,the distributive mechanism of soil pressure in the micro-piles sideways direction have been summarized,and then the internal force in the pile body has been determined,even based on its stiffness,two kinds of failure modes in the micro pile,such as the bending failure,the bending-shear failure have been summed up.Secondly,several designing methods have been briefly introduced:shear strength method,beam on elastic foundation method and p-y curve method,then their merits and demerits have been analyzed.Finally,the shortage in the current theoretical study and experimental investigation methods,especially lack of researches under the action of rainfall and earthquakes have been put forward,and then several suggestions are proposed.更多还原