梯形荷载下条形基础地基附加应力计算几点思考

Consideration of several additional stress calculation of strip foundation under ladder load

附加应力是土体产生沉降的主要原因,如何精确、方便计算出附加应力的大小,对建筑物基础设计及其稳定性将产生重要影响,特别是随着经济社会发展类似高铁、高层建筑、飞机跑道等一些特殊工程的出现,它们对基础沉降敏感性更强,对工后基础沉降要求更高,而沉降量计算是依据附加应力大小,但由于应力计算思路、方法不统一,导致最终沉降计算结果有所差异,从而为工程设计带来麻烦,影响工程质量。这对沉降计算思路、方法的统一显得非常重要,本文主要讨论附加应力叠加法计算原理及附加应力系数确定方法等注意事项。

The additional stress is the main cause of soil settlement production, how accurate, convenient to calculate the additional stress, will have an important impact on the design of building foundation and its stability, especially with the economic and social development of similar high-speed Rail, high-rise buildings, runways and other special projects. They are more sensitive to the foundation settlement after working, higher requirement of foundation settlement, and the settlement calculation is based on the additional stress, but the idea of calculating methods are not unified, stress, leading to the final settlement calculation result differences, so as to cause trouble for the engineering design, affect the quality of the project. The ideas, methods of settlement calculation is very important. This paper mainly discusses the additional stress superposition calculation principle and method of additional stress considerations determine the force coefficient.