水泥土搅拌桩复合地基承载力的双曲线确定法

按相对变形法确定水泥土搅拌桩复合地基载荷试验承载力基本值时 ,相对变形值为某一范围。从工程实践来看 ,按其上、下限确定的承载力相差甚大 ,且在运用时又无成熟的经验和标准 ,不同的测试单位取值标准不同 ,导致测试结论不同。文章在分析大量水泥土搅拌桩复合地基载荷试验资料基础上 ,说明水泥土搅拌桩复合地基载荷试验的P—s曲线近似为一条双曲线 ,通过对双曲线的特征分析 ,得出一种简单实用的确定水泥土搅拌桩复合地基承载力的方法。

快法载荷试验外推确定复合地基承载力

复合地基载荷试验检测过程中,采用相对变形法确定承载力试验需要进行慢速维持荷载法进行试验。本文借鉴工程勘察中载荷试验快速外推法求得慢法试验结果的相关内容,对该方法在复合地基检测中的适用性进行分析,并结合工程检测实例,对比两种方法的试验结果,对使用快速法试验进行复合地基载荷试验检测进行探讨。

The deformation of Poincar subgroups concerning very special relativity

We investigate here various kinds of semi-product subgroups of Poincar6 group in the scheme of Cohen-Glashow＇s very special relativity along the deformation approach by Gibbons- Gomis-Pope. For each proper Poincar6 subgroup which is a semi-product of proper lorentz group with the spacetime translation group T（4）, we investigate all possible deformations and obtain all the possible natural representations inherited from the 5 - d representation of Poincar6 group. We find from the obtained natural representation that rotation operation may have additional accompanied scale transformation when the original Lorentz subgroup is deformed and the boost operation gets the additional accompanied scale transformation in all the deformation cases. The additional accompanied scale transformation has a strong constrain on the possible invariant metric function of the corresponding geometry and the field theories in the spacetime with the corresponding geometry.