斜坡地基附加应力扩散规律的研究

目前对地基中附加应力扩散规律的研究局限于平面地基情况,对斜坡条件下附加应力扩散规律的研究甚少。随着基础设计建设的发展,众多工程在山区丘陵地区实施,有必要研究斜坡条件基底附加应力的扩散规律,以便为工程设计提供参考。通过数值仿真技术,研究斜坡坡比、基础埋深和基础临坡距等3种考察因素,对地基中的附加应力扩散规律的影响。计算运用有限差分软件FLAC3D,分别对不同工况条件下地基中的附加应力进行计算。结果表明:斜坡条件下,附加应力扩散的不对称性主要是由于斜坡临空,缺少约束造成。随着基础上覆建筑物荷载的增加,附加应力不对称角增加。附加应力不对称角与坡比、埋深成正比关系,与临坡距成反比关系。

RESEARCH ON THE DIFFUSION LAW OF THE ADDITIONAL STRESS OF THE SLOPE FOUDATION

The diffusion of additional stress in the foundation law is limited to a flat foundation and little research on the law of slope conditions. With the development of basic design and construction, numerous projects implement in the mountainous. So it is necessary to study the diffusion of additional stress law under the slope conditions, in order to provide a reference for engineering design. In this paper, numerical simulation techniques is used to do research on the diffusion of additional stress law through the facts of the slope ratio, the foundation depth and the distance from the slope. Through using the finite difference software FLAC3D, respectively to calculate the additional stress of the foundation under different conditions., it concludes that under the slope conditions the diffusion of additional stress asymmetry is mainly caused by the lack of constraints due to slope overhead. And the asymmetric angle of the additional stress increases with the increase of the building load covered. The additional stress is directly proportional to the slope ratio and depth of foundation, and has an inverse relationship with the distance from the slope.