成样方法及应力路径对饱和中密细砂CU剪切特性影响

郭莹; 韩杰

doi:10.11779/CJGE2016S2013

成样方法及应力路径对饱和中密细砂CU剪切特性影响 English Version

郭莹,
韩杰

大连理工大学海岸和近海工程国家重点实验室,辽宁大连 116024

详细信息

作者简介:
郭莹(1963- ),女,副教授、硕士生导师,主要从事土力学试验与海洋土力学、土动力学等方面的科学研究以及土力学与基础工程相关的教学工作。E-mail: dl-guoying@163.com。

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出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Influence of sampling methods and stress paths on the consolidated undrained shear behavior of saturated fine sand with medium density

GUO Ying,
HAN Jie

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 采用干装敲击法和湿装夯实法制备50%相对密实度的饱和细砂,进行了常规三轴压缩CTC、等应力三轴压缩TC、减压三轴压缩RTC三种应力路径下的固结不排水（CU）剪切试验,综合分析了成样方法及应力路径对中密细砂力学特性的影响。试验结果表明：各应力路径条件下,成样方法对试验结果均有显著影响,中密状态的饱和细砂试样均表现出显著的剪胀性,RTC路径试样的剪胀性最强;应力路径对试样的有效内摩擦角和峰值有效主应力比基本没有影响,但成样方法对此影响显著。
- 饱和中密细砂 /
- 成样方法 /
- 应力路径 /
- CU剪切试验 /
- 剪胀性
Abstract: The consolidated undrained shear tests are conducted on saturated fine sand with relative density of 50% prepared by using the dry-rapping method and wet tamping method under three stress paths of conventional tri-axial compression CTC, constant stress tri-axial compression TC, reduced tri-axial compression RTC. According to the test results, a comprehensive analysis of the influence of sampling methods and stress paths on mechanical behavior of fine sand with medium density is proceeded. The test results show that the sample preparing methods have considerable influence under various stress paths. The saturated fine sand with medium density exhibits obvious dilatancy. The strongest shear dilatancy is shown for samples with RTC path. The influence of stress path is not obvious on the effective internal friction angle and the peak effective principal stress ratio, but that of the sampling methods is significant.
- saturated fine sand with medium density /
- sampling method /
- stress path /
- CU shear test /
- dilatancy

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参考文献(12)

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