施工扰动对地基承载力的影响分析

Analysis on bearing capacity of foundations regarding construction disturbance

施工扰动的方式多变且复杂,影响到周围土体工程性质的变化。长期以来,在地基承载力理论与分析方法上,都是以原状土为研究对象的。在扰动状态概念(DSC)理论研究基础上,引入施工特征参数和施工扰动因子的概念,建立了施工扰动因子的表达式和考虑施工扰动的地基承载力计算分析模型,同时给出了计算实例。研究结果表明:施工扰动对地基承载力有较大的影响,应采取综合措施控制施工对土体的扰动。

The construction disturbance is complex and changeable, which affects the performances of soil around the site. For a long time, the beating capacity theory and calculation of foundations are based on the undisturbed soil properties. The paper, on the basis of the disturbed state concept, introduces the concept of construction disturbance the expression of disturbance factor and the parameters characteristic of construction disturbance. The research then deals with the calculation model for the bearing capacity of foundations. In addition, the calculation example is also given. The study shows that the construction disturbance exerts an obvious effect on the beating capacity of soils and some engineering measures should be taken to control construction disturbance.