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苏联房屋和工业结构物天然地基设计标准及技术规范[HиTy127—55]中,所提出的地基变形的计算方法,已在国内广泛采用。近期来各有关土木建筑工程的学术刊物中,介绍了一些与规范中的地基变形计算公式同一原理的简化计算方法。在各方法中,计算土中应力是将地基土体当为均质的各向同性的半无限体求解的。但当地表以下不深处有岩层存在时,土中应力分布数值,根据国内外许多学者研究,其解答结果是与上不相同的。本文提出了地基变形和按变形要求确定基础尺寸的简易计算方法。在变形计算中,其特点在于计算土中应力时,考虑了下卧刚性岩层的影响。这对于云贵高原及其它山区,岩层离地表很近的地质条件下,设计地基是有一定意义的。但此方法未在工程实践中证实,故谨提出与大家探讨。
In the design standards and technical specifications for natural foundations for houses and industrial structures of the Soviet Union [Hy Ty127-55], the method for calculating the ground deformation proposed by the Soviet Union has been widely adopted in China. In the recent academic publications on civil engineering, some simplified calculation methods for the same principles as the calculation formulas for ground deformation in the specification are introduced. In each method, the calculation of soil stress is to solve the foundation soil as a homogeneous isotropic semi-infinite body. However, when there are rock layers below the surface of the local table, the stress distribution value in the soil is based on the research of many scholars at home and abroad. The solution result is not the same as above. This paper presents a simple calculation method for determining the basic dimensions of foundation deformation and deformation requirements. In the calculation of deformation, the characteristic is that when calculating the stress in the soil, the influence of the underlying rigid rock formation is considered. This is of great significance for the design of foundations in the geological conditions of the Yunnan-Guizhou Plateau and other mountainous regions where rock formations are very close to the surface. However, this method has not been confirmed in engineering practice. Therefore, I would like to discuss with you.