非对称支护下深基坑受力变形分析

Analysis of Force and Deformation of Deep Foundation Pit under Asymmetric Support

以兰州某非对称支护的深基坑工程为研究背景,采用PLAXIS 2D对其进行了数值分析,结论表明:针对左侧为自然放坡,右侧为二级放坡与预应力锚杆的非对称支护方式下的深基坑,坑底的竖向位移较大,此数值包括隆起量和回弹量;在不同的支护方式下基坑坑壁的水平位移不同,仅在坑底部位不同的支护方式对坑底土体的变形有较大影响。

Based on the research background of a deep foundation pit project with asymmetric support in Lanzhou,the numerical analysis was carried out using PLAXIS 2D.The conclusion shows that:for the deep foundation pit under the asymmetric support mode of natural slope on the left and secondary slope and prestressed anchor on the right,the vertical displacement of the bottom of the pit is large,and this value includes the amount of uplift.The horizontal displacement of the foundation pit wall is different under different support methods,and only the different support methods at the bottom of the pit have a greater impact on the deformation of the soil at the bottom of the pit.