抗滑桩在软弱土基堤防改造工程中的应用

Application of Anti-slide Piles in Embankment Reconstruction Work on Soft Soil Foundation

为研究软弱土基堤防改造工程中抗滑桩布置对其抗滑稳定性的影响,以宁波市奉化江堤防新典路段为研究对象,采用有限元软件ABAQUS,基于强度折减法,分析了抗滑桩不同桩长和桩间距情况下堤防的抗滑稳定安全系数。计算结果表明,桩长较短可能不会起到抗滑作用,桩长增加后,抗滑稳定安全系数随桩间距的增大而降低,之后趋于常数;桩间距不变时,堤防抗滑稳定安全系数随桩长增加而增加,之后也趋于常数。最终,通过对抗滑稳定安全系数和桩长、桩间距曲线的拟合,选取合理的桩长和桩间距应用于此工程。

In order to study the influence of anti-slide pile layout on the anti-slide stability of the embankment reconstruction work on soft soil foundation,taking the Xindian section of Fenghua River embankment in Ningbo as the research object,this paper analyzes the anti-slip stability safety coefficient of the embankment with different length and spacing of anti-slides piles by the finite element software ABAQUS and the strength reduction method.The calculation results show that:The pile in shorter length may not have anti-slide effect yet.When the pile length increases the anti-slide stability safety factor decreases and then tends to be constant with the increase of pile spacing.Under the same pile spacing,the anti-slide stability safety factor of embankment increases and then also tends to be constant with the increase of pile length.Finally,by fitting the curve of anti-slide stability safety coefficient to the pile length and pile spacing,the piles with proper length and spacing are applied in this work.