多级加载下附加应力沿深度变化的单层地基一维固结（英文）

发布时间：2018-03-19 07:22

本文选题：土层　切入点：一维固结　出处：《岩土工程学报》2015年02期 　论文类型：期刊论文

【摘要】：在岩土工程中,当天然土层的强度较小时,加载速率过快可能会导致地基失稳。在这种情况下,可以采用多级加载的方式来逐步提高地基强度,使地基在施加下一级更大的荷载时已固结到一定程度。另外,在很多情况下,外部荷载在地基内引起的总附加应力总是随着深度发生变化,而并非保持不变,例如,当土层中地下水位发生变化时即是如此。详细给出了一个考虑多级加载下附加应力沿深度变化的单层地基一维固结的完全显式解析解。然后,选取外部荷载二级施加的特例来分析单层地基的固结性状。最后,通过比较不同的计算项数所得的计算结果来评估所得的级数解的收敛性,以利于工程人员采用本文解时能够获得足够的精度。
[Abstract]:In geotechnical engineering, when the strength of the natural soil layer is small, the loading rate may lead to the instability of the foundation. In this case, the multi-stage loading method can be used to gradually increase the strength of the foundation. In many cases, the total additional stresses caused by external loads in the foundation always change with depth rather than remain constant, for example, This is the case when the groundwater level in the soil layer changes. A fully explicit analytical solution for one-dimensional consolidation of a single-layer foundation considering the variation of additional stresses along the depth under multistage loading is presented in detail. The consolidation behavior of monolayer foundation is analyzed by a special case of two levels of external load. Finally, the convergence of the series solution is evaluated by comparing the calculation results of different terms. It is helpful for engineers to obtain enough precision when using the solution in this paper.
【作者单位】：中国矿业大学深部岩土力学与地下工程国家重点实验室;中国矿业大学力学与建筑工程学院;浙江大学滨海和城市岩土工程研究中心;纽卡斯尔大学澳大利亚研究委员会岩土科学与工程卓越中心;
【基金】：Fundamental Research Funds for the Central University of China(2013QNA43) National Natural Science Foundation of China(51009135) Special Financial Support from China Postdoctoral Science Foundation(2012T50525)
【分类号】：TU470

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