刚性基础与柔性基础下复合地基模型试验对比研究

MODEL TESTS ON COMPOSITE GROUND UNDER SOFT AND STIFF FOUNDATION

通过设计和完成刚性基础与柔性基础下水泥搅拌桩复合地基模型对比试验 ,得出两者在桩体荷载集中系数、桩土荷载比、桩土应力比等方面的显著差异 ,并对两者的破坏机理等进行了研究。

Tests on a composite ground with cement?clay piles on the soft and stiff foundation are conducted. An attempt is made to investigate the character of both foundations, and to stress on the load and stress distribution between the pile and soil. The pile model is made of the baked clay with 18% cement. Some useful conclusions are obtained through the study. The mechanism of failure in both foundations is much different. In the stiff foundation, the stress between the pile and soil are ascended with the increasing load. It is just the opposite what happens in the stiff case when in the soft case. At last, the bearing capacity of the soft and stiff foundations are higher than that of the original soil.