全埋刚架桩与单排抗滑桩加固边坡效用对比分析

Comparative Analysis of the Effect of Fully Buried Rigid Frame Pile and Single Row Anti Slide Pile on Slope Reinforcement

依据混凝土用量相等原则,将一实际加固边坡工程中采用的单排抗滑桩等效为全埋刚架桩,并采用有限元分析软件ABAQUS分别建立了全埋刚架桩和单排抗滑桩加固边坡的三维有限元模型,得到了两者加固边坡的安全系数和水平位移、桩内力及位移分布规律,并从定量的角度直观的对比刚架桩与单排桩加固边坡效果及受力的差异性,以探讨刚架桩加固边坡的优势。研究表明,相比较于单排抗滑桩,单排抗滑桩弯矩分布为“弓”形,而全埋刚架桩的弯矩分布呈“S”形;全埋刚架桩由于连梁的协调作用,其内力更小,采用全埋刚架桩加固边坡的位移更小,安全系数更大,边坡更安全。

This paper presents a case history of the comparative study of a single row of anti-slide pile used in a practical slope reinforcement project is equivalent to a fully buried rigid frame piles by from the principle of the equal concrete consumption.The three-dimensional finite element model of the fully buried rigid frame piles and a single row of anti-slide pile for slope rein-forcement is established by using the finite element analysis software ABAQUS.The factor of safety,horizontal displacement,internal force and displacement distribution of the two types of piles are obtained.From the quantitative point of view,the differences of the effect and stress between the rigid frame pile and the single row pile are compared intuitively to discuss the advantages of the rigid frame pile in slope reinforcement.Comparing with single row anti-slide pile,the results show that,the bending moment distribution of single row anti slide piles is a"bow"shape,while that fully embedded rigid frame piles is an"S"shape.Due to the connections of the continuous waler,the fully buried rigid frame pile bears less internal force.The dis-placement of the slope strengthened by the fully buried rigid frame pile is smaller,the factor of safety is larger,and the slope is thereforesafer.