软土地基既有房屋的承载力

BEARING CAPACITY RECTIFYING OF EXISTED BUILDING ON SOFT SOIL FOUNDATION

软土地基在既有房屋长期荷载作用下，地基土强度参数值随着地基土的排水固结和压密而提高，地基承载力也同时增大，如何估算此提高值而挖掘其潜力，传统方法利用实测资料回归出修正系数。本文从土力学基本原理出发，借助Ｐｒａｎｔｌ假定，提出了承载力的近似计算公式。

With the consolidation and compaction of soil, values of strength para meters of foundation soil are increased under the long existed building loading on the soft soil foundation, so does soil bearing capacity. How to evaluate the increasement of bearing capacity and make use of it? In the past rectifying coefficient is obtained by regression analysis of measure data. From the basic principles of soil mechanics, an approach of bearing capacity is proposed in this paper according to Prantls hypothesis.