饱和重塑黏土空心圆柱试样的压制技术及应用

董彤; 郑颖人; 孔亮; 柘美

doi:10.11779/CJGE2017S1009

饱和重塑黏土空心圆柱试样的压制技术及应用 English Version

董彤¹,
郑颖人^1,2,
孔亮³,
柘美⁴

1. 岩土力学与地质环境保护重庆市重点实验室,后勤工程学院,重庆 401311;
2. 重庆市地质灾害防治工程技术研究中心,重庆 400041;
3. 青岛理工大学理学院,山东青岛 266033;
4. 重庆交通大学土木建筑学院,重庆 400074

基金项目: 国家自然科学基金项目（11572165）

详细信息

作者简介:
董彤(1990-),男,山东新泰人,博士研究生,主要从事岩土本构关系方面的研究。E-mail:dt0706@126.com。

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出版历程
- 收稿日期: 2016-11-27
- 发布日期: 2017-11-19

Compression method for hollow cylinder specimens of saturated remolded clay and its application

1. Chongqing Key Laboratory of Geomechanics Geoenvironmental Protection, Logistical Engineering University, Chongqing 401311, China;
2. Chongqing Engineering and Technology Research Center of Geological Hazard Prevention and Treatment, Chongqing 400041, China;
3. School of Sciences, Qingdao Technological University, Qingdao 266033, China;
4. Institute of Civil Engineering and Construction, Chongqing Jiao Tong University, Chongqing 400074, China

摘要

摘要: 由于黏土黏性大、受扰动易产生裂隙,采用常规的击实法和固结法所制备的空心圆柱试样存在整体不均匀、饱和度较低、切削面裂隙丰富等问题。在重塑试样击实器的基础上,研制了一种能制备实心与空心圆柱重塑试样的压样装置,可以很好地模拟天然状态下土体形成过程。依据改进的分层欠压法,试验选取最优初始欠压系数,在每层试样高度相同的条件下,严格控制每层试样的质量,而后采用抽气饱和法将所压制的试样进行饱和。通过应力路径三轴试验和纯主应力轴旋转试验,从可重复性和力学特性两个方面验证了所制备的饱和重塑黏土试样用于研究复杂应力路径下土体变形特性与本构关系的可靠性,为后续重塑土的理论与试验研究提供了重要的保证。
- 饱和重塑黏土 /
- 空心圆柱试样 /
- 分层欠压法 /
- 主应力轴旋转
Abstract: Due to the viscosity and easy-cracked characteristics of clay, series problems, such as non-homogeneity, low-saturation and microcracks, exist in the hollow cylinder specimens generally made by using the compaction method and the consolidation method. Based on the traditional compacting instrument, a newly designed specimen presser can be employed to prepare the remolded solid and hollow cylindrical specimens by simulating the forming process of natural soils. According to the improved undercompaction method and the optimal initial undercompaction coefficient obtained by tests, the quality of each layer is controlled strictly with the same height. After being saturated by the pumping saturation method, the reliability of remolded specimens is proved considering the repeatability and mechanical properties when the specimens are used to study the deformation characteristics and the constitutive relation of soils under complex stress paths. All those may provide the assurance of long-term studies on saturated remolded clay.
- saturated remolded clay /
- hollow cylinder specimen /
- layered under compaction method /
- principal stress rotation

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参考文献(14)

[1]	LIN H, PENUMADU D. Experimental investigation on principal stress rotation in Kao line lay[J]. Journal of Geotechnical and Geoenvironmental Engineering. ASCE, 2005, 131(5): 633-642.
[2]	YASUHARA K, YAMANOUCHI T, HIRAO K. Cyclic strength and deformation of normally consolidated clay[J]. Soils and Foundations, 1982, 22(3): 77-91.
[3]	张泉芳, 赵宇, 黄博, 等. 空心圆柱扭剪仪重塑样击实器的研制[J]. 实验室研究与探索, 2008, 27(5): 42-44, 84. (ZHANG Quan-fang, ZHAO Yu, HUANG Bo, et al. Development of a compacting instrument for reconstituted samples in hollow cylinder apparatus[J]. Research and Exploration in Library, 2008, 27(5): 42-44, 84. (in Chinese))
[4]	YASUHARA K, MURAKAMI S, SONG B, et al. Post cyclic degradation of strength and stiffness for low plasticity silt[J]. Journal of Geotechnical and Geoenvironmental Engineering. ASCE, 2003, 129(8): 756-769.
[5]	HYDE A, WARD S. A pore pressure and stability model for a silty clay under repeated loading[J]. Géotechnique, 1985, 35(2): 113-125.
[6]	聂影. 复杂应力条件下饱和重塑黏土动力特性试验研究[D]. 大连: 大连理工大学, 2008. (NIE Ying. Experimental study on dynamic behavior of saturated clay under complex stress condition[D]. Dalian: Dalian University of Technology, 2008. (in Chinese))
[7]	齐剑峰. 饱和黏土循环剪切特性与软化变形的研究[D]. 大连: 大连理工大学, 2007. (QI Jian-feng. A study on cyclic shear behavior and softening deformation of saturated clay[D]. Dalian: Dalian University of Technology, 2007. (in Chinese))
[8]	沈扬, 王保光, 陶明安, 等. 重塑黏土空心圆柱试样制备技术改进及应用[J]. 岩土力学, 2015, 36(增刊1): 697-701. (SHEN Yang, WANG Bao-guang, TAO Ming-an. et al. Improvement of preparing technique for hollow cylinder specimen of remolded clay and its application[J]. Soil and Rock Mechanics, 2015, 36(S1): 697-701. (in Chinese))
[9]	中国人民解放军后勤工程学院. 一种半自动多功能土工试验压样机：中国,2014207036669[P]. 2015-01-26. (Logistical Engineering University of PLA. A semi-automatic multi-function specimen presser: China, 2014207036669[P]. 2015-01-26. (in Chinese))
[10]	中华人民共和国水利部. GB/T 50123—1999土工试验方法标准[S]. 1999. (PRC Minister of Water Resources. GB/T 50123—1999 Standard for soil test method[S]. 1999. (in Chinese))
[11]	CHAUDARG S K, KAWANO J, HASHIMOTO S, et al. Effects of initial fabric and shearing direction on cyclic deformation characteristics of sands[J]. Soils and Foundations, 2002, 42(1): 147-157.
[12]	李立青, 蒋明镜, 苏佳兴, 等. 制备TJ–1模拟月壤空心圆柱试样的新方法[J]. 冰川冻土, 2011, 33(4): 927-932. (LI Li-qing, JIANG Ming-jing, SU Jia-xing, et al. A new preparation method of hollow cylinder specimen for TJ-1 Lunar soil simulant[J]. Journal of Glaciology and Geocryology, 2011, 33(4): 927-932. (in Chinese))
[13]	中国人民解放军后勤工程学院. 一种空心圆柱试样饱和器:中国, 2015103905378[P]. 2015-10-21. (Logistical Engineering University of PLA. A hollow cylinder specimen saturator: China, 2015103905378[P]. 2015-10-21. (in Chinese))
[14]	SYMES M J, GENS A, HIGHT D W. Drained principal stress rotation in saturated sand[J]. Géotechnique, 1988, 38(1): 58-81.

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文章访问数: 324
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饱和重塑黏土空心圆柱试样的压制技术及应用 English Version

作者简介: 董彤(1990-),男,山东新泰人,博士研究生,主要从事岩土本构关系方面的研究。E-mail:dt0706@126.com。

计量

出版历程

Compression method for hollow cylinder specimens of saturated remolded clay and its application

计量

出版历程

目录

作者简介:
董彤(1990-),男,山东新泰人,博士研究生,主要从事岩土本构关系方面的研究。E-mail:dt0706@126.com。