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抗滑桩和挡土墙这两种支挡结构物在滑坡地质灾害治理中均有广泛的运用,桩墙联合支挡结构兼具了两者的优势和特点。本文结合工程实例,对抗滑桩桩长、嵌固长度和弹性模量等3个影响桩墙联合支挡结构受力性能的重要因素展开讨论。通过对比分析可知,桩长为坡脚处至基岩表面深度处距离的两倍左右为宜,较大的锚固长度和弹性模量能有效减小抗滑桩自由段的水平位移,但出于经济性的角度考虑,在能满足整个支挡结构稳定的前提下,选择较低弹性模量的抗滑桩更有利于节省经济。
Anti-slide piles and retaining walls of the two kinds of retaining structures in the landslide geological disasters have a wide range of applications, combined with the supporting structure of the pile wall both the advantages and characteristics. In this paper, three important factors influencing the mechanical behaviors of the composite retaining wall of pile-wall are discussed with engineering examples. The length of anti-slide pile, length of embedment and elastic modulus are discussed. Through comparative analysis, we can see that the length of the pile is about two times of the distance from the foot of the slope to the depth of the bedrock surface, and the larger anchorage length and elastic modulus can effectively reduce the horizontal displacement of the free section of the anti-slide pile. However, Economic considerations, to be able to meet the stability of the entire support structure premise, choose a lower elastic modulus anti-slide pile is more conducive to saving the economy.