CAJ | 학술논문

抗滑桩土拱效应的研究目前主要建立在连续介质理论的基础上，与土体自身非连续、非均匀散粒体的固有属性不符，因此有必要进一步深入探讨其成拱机理。采用颗粒流方法，揭示了土拱效应的形成、发展和破坏过程，在此基础上，研究了土拱作用下抗滑桩桩径比、桩土相对变形速度和土体颗粒粒度组成对桩土荷载分担比的影响规律。结果表明：以上因素对抗滑桩土拱效应影响显著。土拱的承载能力随着桩径比的增大而减小，随桩土间的相对运动速度和土颗粒的分布宽度增大而增大；因此在抗滑桩设计及布桩位置选择时，应尽可能考虑相关影响因素，以优化设计，节省投资。
항활장토공효응적연구목전주요건립재련속개질이론적기출상，여토체자신비련속、비균균산립체적고유속성불부，인차유필요진일보심입탐토기성공궤리。채용과립류방법，게시료토공효응적형성、발전화파배과정，재차기출상，연구료토공작용하항활장장경비、장토상대변형속도화토체과립립도조성대장토하재분담비적영향규률。결과표명：이상인소대항활장토공효응영향현저。토공적승재능력수착장경비적증대이감소，수장토간적상대운동속도화토과립적분포관도증대이증대；인차재항활장설계급포장위치선택시，응진가능고필상관영향인소，이우화설계，절성투자。
The studies on soil arching effect of anti-slide piles are mainly based on the continuous medium theory at present. It is difficult to consider the distribution of soil particle size and other important factors. It is necessary to further reveal the arching mechanism of soil which is non-continuous and non-uniform material. PFC2D is used to study the effects of anti-slide pile size, spacing, pile-soil relative deformation rate and soil particle size distribution on the format ion, development, destruction of the soil arch. The effects of the above factors on the maximum bearing capacity, residual bearing capacity of the soil arch and the pile-soil load share ratio are revealed. The results show that the effects of these factors are significant. The maximum bearing capacity of the soil arch decreases as the increase of the ratio of the pile spacing to the width, and increases as the increase of pile-soil relative deformation velocity and soil particle distribution width. Therefore, related factors should be considered as far as possible in anti-slide pile design and cloth pile location selection, to optimize the design and save investment.