抗滑桩在加固边坡稳定性中的应用及影响分析

为保证河道边坡稳定及行洪能力,减少城市用地,研究挡墙与抗滑桩相结合的边坡复式断面作为河道断面设计的重点。采用有限元计算软件,建立挡墙与抗滑桩相结合的复式断面数值模型,分析不同桩长、桩径的抗滑桩设计与安全系数之间的变化规律。结果表明,此类边坡的潜在滑弧位置会随着抗滑桩的桩长增加而上移,计算所得安全系数随着抗滑桩桩长的增长,出现先增大后减少的现象,故抗滑桩桩径的设计应结合实际需要综合确定。本研究为类似边坡抗滑桩设计提供参考依据。

Analysis on application of slide-resistant pile to reinforcement of slope stability and its effect

In order to ensure the slope stability and flood carrying capacity of river channel and reduce urban land use，a compound slope section in combination with retaining-wall and slide-resistant pile is studied to be taken as the key point for the design of the river channel section. With the software of finite element，a numerical model for the compound section combined with both retaining-wall and slide-resistant pile is established，and then the changing law between the designs of the slide-resistant piles with various length and diameters and their safety coefficients is analyzed. The result shows that the potential location of the sliding surface of this kind of slope is to move upward along with the increase of the length of the pile，while the calculated safety coefficient is to be increased along with the pile length with a phenomenon of increasing at first and then decreasing，thus the design of slide-resistant pile is to be comprehensively determined in combination with the actual demand. This study provides a reference for the design of the similar slide-resistant pile for slope.