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文章首先提出了一种新型的抗滑桩结构形式-微桩-土耦合式抗滑桩。然后在对边坡工程中抗滑桩间土拱效应分析的基础上,提出应以桩间静力平衡条件、跨中截面强度条件共同控制来确定桩间距。得到了较为合理的桩间距的计算公式,定量地说明了在其他因素不变的情况下,桩间距随桩后土体粘聚力或内摩擦角的增大而增大,却随着桩后坡体推力的增大而减小。最后以工程实例说明了文章所论证的桩间距计算公式是合理的。
The article first proposed a new type of anti-slide pile structure - micro-pile-soil coupling anti-slide pile. Based on the analysis of soil arching effect of anti-slide piles in slope engineering, it is proposed that the pile spacing should be determined by the common control of static balance condition and mid-span cross-section strength condition. A more reasonable calculation formula of pile spacing is obtained, which quantitatively shows that with other factors unchanged, the pile spacing increases with the increase of cohesion or internal friction angle of the soil behind the pile, The slope thrust increases and decreases. Finally, an engineering example is given to illustrate that the calculation formula of pile spacing is reasonable.