斜坡地基附加应力分布规律模型试验及数值模拟
发布时间：2018-12-27 14:31
【摘要】：不少山区输电线路的铁塔基础都建在斜坡上,研究斜坡地基内附加应力的分布规律很有必要。采用室内模型试验和数值模拟相结合的方法,研究了临坡距对斜坡地基附加应力分布及扩散规律的影响。研究成果表明,当临坡距小于安全距离时,地基附加应力随临坡距的增大而增大,并在基础两侧具有显著的非对称性;当临坡距超过安全距离时,附加应力逐渐趋于稳定,基本接近平面地基状态。传统的平面地基附加应力计算方法不适用于斜坡地基,当临坡距在0.3 m时,地基浅层附加应力接近平面地基条件的50%,说明斜坡对地基附加应力的影响十分显著。在小临坡距条件下地基附加应力较小,但对应的地基变形却较大,也说明传统的分层总和法不适于计算斜坡地基变形,否则将影响工程安全。在地基稳定性满足要求的前提下,建议最小临坡距不小于安全距离。
[Abstract]:The tower foundation of many mountain transmission lines is built on the slope, so it is necessary to study the distribution of additional stress in the slope foundation. The influence of slope spacing on the distribution and diffusion of additional stress in slope foundation is studied by using the method of indoor model test and numerical simulation. The results show that the additional stress increases with the increase of the adjoining distance and has significant asymmetry on both sides of the foundation when the distance is less than the safe distance. When the distance between the slope and the slope exceeds the safe distance, the additional stress tends to be stable and is close to the state of the plane foundation. The traditional method for calculating the additional stress of the plane foundation is not suitable for the slope foundation. When the adjacent slope distance is 0.3 m, the additional stress in the shallow layer of the foundation is close to 50% of the condition of the plane foundation, which shows that the slope has a very significant effect on the additional stress of the foundation. Under the condition of small slope distance, the additional stress of the foundation is small, but the corresponding deformation of the foundation is larger. It also shows that the traditional method of stratified summation is not suitable for calculating the deformation of the slope foundation, otherwise, it will affect the safety of the project. On the premise that the stability of foundation meets the requirement, it is suggested that the minimum distance of temporary slope is not less than the safe distance.
【作者单位】： 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【分类号】：TU470
[Abstract]:The tower foundation of many mountain transmission lines is built on the slope, so it is necessary to study the distribution of additional stress in the slope foundation. The influence of slope spacing on the distribution and diffusion of additional stress in slope foundation is studied by using the method of indoor model test and numerical simulation. The results show that the additional stress increases with the increase of the adjoining distance and has significant asymmetry on both sides of the foundation when the distance is less than the safe distance. When the distance between the slope and the slope exceeds the safe distance, the additional stress tends to be stable and is close to the state of the plane foundation. The traditional method for calculating the additional stress of the plane foundation is not suitable for the slope foundation. When the adjacent slope distance is 0.3 m, the additional stress in the shallow layer of the foundation is close to 50% of the condition of the plane foundation, which shows that the slope has a very significant effect on the additional stress of the foundation. Under the condition of small slope distance, the additional stress of the foundation is small, but the corresponding deformation of the foundation is larger. It also shows that the traditional method of stratified summation is not suitable for calculating the deformation of the slope foundation, otherwise, it will affect the safety of the project. On the premise that the stability of foundation meets the requirement, it is suggested that the minimum distance of temporary slope is not less than the safe distance.
【作者单位】： 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【分类号】：TU470
【参考文献】
相关期刊论文 前1条
1 徐志英;以明特林(Mindlin)公式为根据的地基中垂直应力的，
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