阳角挡土墙受力特性数值分析

Numerical Analysis on Force Characteristics of Retaining Wall with Exposed Corner

工程中的挡土墙在阳角处经常出现裂缝,既影响外表美观,又给人不安全感。针对这一现象,采用有限差分软件FLAC3D,对阳角挡土墙进行受力特性分析。通过分析可以发现,在阳角处具有明显不同于平面应变问题的空间受力特性,墙体存在不同程度的拉应力,导致墙体产生拉伸裂缝。基于这一特点提出了设计时在阳角处可以采取的预防措施,即在挡土墙的阳角处设置伸缩缝防止开裂。

Cracks usually appear at exposed corner of retaining wall, causing both esthetic and safety problems. In relation to this phenomenon, the analysis on the force characteristics thereof was carried out with finite difference software FLAC3D. As a result, it is found that, at the exposed corner, there exists spatial force performance so different from plain strain issues that the wall is under tensile stress at varying degrees, causing tension cracks on the wall; hence, it is suggested that prevention measures may used at exposed corner in design, i.e. expansion joint may set there to prevent from cracking.