黏土的张拉-剪切耦合强度研究

发布时间：2018-03-12 18:46

  本文选题：饱和黏土　切入点：拉剪联合作用　出处：《岩土力学》2016年08期 　论文类型：期刊论文

【摘要】：现有的土体强度研究主要集中在土体受到压缩剪切作用,而针对单轴拉伸、拉剪耦合或多向拉伸作用的研究较少。当前土的联合强度理论仍建立在土体受压缩剪切作用的基础上,不适用于分析土的抗拉强度和拉剪耦合强度。针对饱和黏土中的拉剪联合作用,建立了饱和黏土的张拉-剪切耦合强度模型,给出了饱和黏土张拉-剪切耦合强度公式以及多向拉伸作用下的强度公式;基于已有的饱和黏土试验数据以及所做的饱和黏土室内试验数据对所建立的强度模型预测能力进行了验证,并与其他联合强度模型进行对比分析,检验了强度模型的适用性和准确性;强度模型全面、合理地描述了饱和黏土的压剪强度、张拉-剪切耦合强度及多向拉伸强度特征,为饱和黏土张拉-剪切耦合问题的解决奠定了理论基础。
[Abstract]:The existing research on the strength of soil is mainly focused on the compression and shearing of the soil, but for uniaxial tension, The theory of combined strength of soil is still based on the compression and shear action of soil. It is not suitable for analyzing the tensile strength and the tension-shear coupling strength of the saturated clay. The tension-shear coupling strength model of the saturated clay is established for the combined action of tension and shear in the saturated clay. The tension-shear coupling strength formula of saturated clay and the strength formula under multi-direction tension are given. Based on the existing saturated clay test data and the indoor saturated clay test data, the prediction ability of the strength model is verified and compared with other combined strength models. The applicability and accuracy of the strength model are tested, and the strength model is comprehensive and reasonably describes the characteristics of compressive shear strength, tension-shear coupling strength and multi-direction tensile strength of saturated clay. It lays a theoretical foundation for the solution of the tension-shear coupling problem of saturated clay.
【作者单位】： 北京交通大学土木建筑工程学院;桂林理工大学土木与建筑工程学院;
【基金】：国家自然科学基金资助项目(No.51478135) 北京市自然科学基金资助项目(No.8162032) 中央高校基本科研业务费项目(No.2015JBM068) 广西岩土力学与工程重点实验室开放基金项目(No.14-KF-05)~~
【分类号】：TU442
，

本文编号：1602819