平行试样土水特征曲线及其力学性质的试验研究

杨钢; 杨庆; 李吴刚

doi:10.11779/CJGE2018S1036

平行试样土水特征曲线及其力学性质的试验研究 English Version

杨钢^{1, 2},
杨庆^{1, 2},
李吴刚²

1. 海岸和近海工程国家重点实验室（大连理工大学）,辽宁大连 116024;
2. 大连理工大学岩土工程研究所,辽宁大连 1160241

基金项目: 国家自然科学基金项目（41572252）; 辽宁省博士科研启动基金项目（201601055）

详细信息

作者简介:
杨钢(1979- ),男,工程师,主要从事非饱和土特性方面的科研。E-mail：foreignsteel@dlut.edu.cn。

中图分类号: TU43
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- 文章访问数: 208
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- PDF下载量: 119
出版历程
- 收稿日期: 2017-06-10
- 发布日期: 2018-08-24

Experimental research on soil water characteristic curve of parallel specimens and its influence on mechanical behavior

YANG Gang^{1, 2},
YANG Qing^{1, 2},
LI Wu-gang²

1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
2. Institute of Geotechnical Engineering, Dalian University of Technology, Dalian ll6024, China

摘要

摘要: 基于压力板仪对相同制样参数的8个三轴试样进行SWCC试验,对比试样土水特征曲线的差异,并对试验完成后的7个有效三轴试样进行无侧限抗压强度试验。通过对比研究剪切力与剪切位移关系、峰值强度与饱和度关系等内容,对试样的力学性质进行研究,并通过饱和度时程曲线对其结果进一步分析。研究结果表明：即便是相同条件制备的试样,其SWCC之间也会存在差异性,并与一定基质吸力范围相对应,但随着基质吸力增大,SWCC趋于一致;在SWCC试验后,由于高基质吸力下试样的平衡饱和度差异极小,试样的峰值强度与平衡饱和度没有必然联系;在一定基质吸力范围内,饱和度时程曲线相近的试样,最终的力学特性也相近,考虑这一基质吸力范围对应的孔隙在试样中占主导地位,因此这段时程曲线可以为试样均一性的研究提供一定思路。
- SWCC /
- 压力板仪 /
- 试样差异性 /
- 无侧限抗压强度 /
- 时程曲线
Abstract: The drying tests on eight triaxial specimens with the same remolding condition are carried out for soil water characteristic curve (SWCC). The differences of SWCC are compared. The unconfined compressive strength tests on seven effective specimens after SWCC tests are carried out. The relationships of shear force-shear displacement, peak strength-saturation degree, and saturation degree-time are investigated for analyzing the mechanical behavior of specimens. The results show that there are significant differences for SWCC in a certain range of matric suction, and with the increase of matrix suction SWCC will tend to be uniform. After SWCCs tests are finished, differences of equilibrium saturation degree between parallel specimens are very small because of high matrix suction, and then the peak strength and equilibrium saturation degree do not have necessary connection. At a certain range of matric suction, the specimens with similar curves of saturation degree versus time have approximate mechanical behavior. Because the pore ranges corresponding to this range of matric suction play a leading role in the specimens, the uniformity of specimens will be studied by the corresponding curves of saturation degree versus time.
- SWCC /
- pressure plate extractor /
- difference of specimen /
- unconfined compressive strength /
- time-history curve

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参考文献(20)

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平行试样土水特征曲线及其力学性质的试验研究 English Version

作者简介: 杨 钢(1979- ),男,工程师,主要从事非饱和土特性方面的科研。E-mail：foreignsteel@dlut.edu.cn。

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出版历程

Experimental research on soil water characteristic curve of parallel specimens and its influence on mechanical behavior

期刊类型引用(3)

其他类型引用(2)

计量

出版历程

目录

作者简介:
杨钢(1979- ),男,工程师,主要从事非饱和土特性方面的科研。E-mail：foreignsteel@dlut.edu.cn。