既有红黏土地基压密固结效应研究

The Existed Foundation of Red Clay of Pressure Consolidation Effec Research

为了解受荷时间对既有红黏土地基压密固结效应的影响,针对影响承载力变化的"时间"因素,利用贵州铝厂氧化铝厂中受上部荷载分别为40年、30年、20年的既有红黏土地基载荷试验与地基土的物理力学性质试验,对地基土压密的时效性进行了研究。试验获得了12个工点地基土的承载力特征值、极限荷载、变形模量、相关土工试验数据以及地基土性状随时间发生变化的规律。结果表明,长期受上部荷载作用的既有红黏土地基表现出明显的压密固结效应,承载力提高幅度达到了6.7%到73.3%,红黏土地基承载力随受荷时间的增加呈上升趋势。研究结果以期为贵州铝厂其他车间的改建与重新开发提供地质依据。

In order to understand by the load time of both red clay soil compaction effect of consolidation effect,in view of the impact of the bearing force variation of the ＂ time＂,the use of alumina plant in Guizhou aluminum plant by upper load respectively for 40 years,30 years,20 years of both the physical and mechanical properties of red clay ground loading test and the foundation soil test,timeliness of soil compaction were studied. The test obtained 12 worksite of foundation soil bearing force characteristic value,ultimate load,deformation modulus and related geotechnical test data and character of foundation soil with time change the rules. The results show that the load bearing capacity of the red clay foundation is increased by 6. 7% to 73. 3%,and the bearing capacity increases with the increase of load time. The results of the study in order to provide geological basis for the reconstruction of Guizhou aluminum plant and other are development.