取土器贯入扰动变形规律透明土试验研究

罗如平; 吴跃东; 刘坚; 杨冬

doi:10.11779/CJGE2017S1013

取土器贯入扰动变形规律透明土试验研究 English Version

罗如平^1,2,
吴跃东^1,2, ,,
刘坚^1,2,
杨冬^1,2

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098;
2. 河海大学岩土工程科学研究所,江苏南京 210098

基金项目: 国家自然科学基金项目（51279049）; 中央高校基本科研业务费项目（2015B025914）

详细信息

作者简介:
罗如平(1989-),男,江西吉安人,硕士研究生,主要从事岩土工程测试及桩基工程研究。E-mail:luoruping89928@163.com。

通讯作者:
吴跃东，E-mail：hhuwyd@163.com

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出版历程
- 收稿日期: 2016-12-01
- 发布日期: 2017-11-19

Tests on transparent soil for soil disturbance deformation induced by sampler penetration

LUO Ru-ping^1,2,
WU Yue-dong^1,2, ,,
LIU Jian^1,2,
YANG Dong^1,2

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China

摘要

摘要: 在岩土工程取样过程中,取土器贯入会引起土样扰动变形,造成土样物理力学性质的改变。为了研究取土器贯入过程中土体扰动变形特性及其影响因素,基于透明土及PIV技术,进行了不同尺寸、不同贯入速率的取土器贯入试验,得到了取土器贯入过程中土体扰动变形场的分布特性及规律。模型试验结果表明：土体扰动变形随着贯入深度增大而增大,管内土体表现为向上的隆起变形,在深度方向最大变形基本位于深度20 mm处;增大取土器内径能有效减小轴线处土体扰动变形,但减小幅度随着内径的增大而减小;增大取土器贯入速率不能有效地减小结构性较弱的砂性土样的扰动变形。
- 取土器 /
- 扰动变形 /
- 透明土 /
- PIV技术 /
- 贯入速率
Abstract: The soil disturbance deformation induced by sampler penetration has a significant influence on the physical and mechanical properities of soil in soil investigation engineering. A series of small-scale model tests with different sampler diameters and penetration rates are conducted to investigate the disturbance deformation characteristics of soil and the influence factors during sampler penetration by using transparent soils and PIV (particle image velocimetry) technique. The test results show that the disturbance deformation of soil increases with the depth of sampler penetration, and the disturbance deformation of soil in sampler is mainly upheaval, and the maximum upheaval deformation occurs at the depth about 20 mm. Increasing the sampler diameter can reduce the disturbance deformation of soil at sampler centerline effectively, but the reduced magnitude of deformation decreases with the sampler diameter. The sampler penetration rate has no effect on the disturbance deformation of non-structured soil.
- soil sampler /
- disturbance deformation /
- transparent soil /
- PIV technique /
- penetration rate

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参考文献(14)

[1]	HVORSLEV M J. Subsurface exploration and sampling of soils for civil engineering purposes[J]. WES Corp of Engineers, USA, 1949.
[2]	魏汝龙, 王年香. 赤湾港软土取土质量的研究[J]. 港口工程, 1989(6): 1-6. (WEI Ru-long, WANG Nian-xiang. Research of sampling quality for chi-wan port soft clay[J]. Port Engineering 1989(6): 1-6. (in Chinese))
[3]	MOHSEN M, BALIGH Amr S, AZZOUZ, et al. Disturbances due to “ideal” tube sampling[J]. Journal of Geotechnical Engineering, 1987, 113(7): 739-757.
[4]	CLAYTON C R I, SIDDIQUE A, HOPPER R J. Effects of sampler design on tube sampling disturbance numerical and analytical investigations[J]. Géotechnique, 1998, 48(6): 847-867.
[5]	左文荣, 吴跃东, 李治国, 等. 取土器贯入土体引起土体扰动的理论分析[J].河海大学学报:自然科学版, 2009, 37(6): 702-706. (ZUO Wen-rong WU Yue-dong LI Zhi-guo, et al. Theoretical analysis of disturbance of soils caused by penetration of soil samplers[J]. Journal of Hohai University(Natural Sciences), 2009, 37(6): 702-706. (in Chinese))
[6]	ISKANDER M, LAI J, OSWALD C, et al. Development of a transparent material to model the geotechnical properties of soils[J]. Geotechnical Testing Journal, 1994, 17(4): 425-433.
[7]	SADEK S, ISKANDER M G, LIU J. Geotechnical properties of transparent silica[J]. Canadian Geotechnical Journal, 2002, 39(1): 111-124.
[8]	NI Q, HIRD C C, GUYMER I. Physical modelling of pile penetration in clay using transparent soil and particle image velocimetry[J]. Géotechnique, 2009, 60(2): 121-132.
[9]	AHMED M, ISKANDER M. Analysis of tunneling-induced ground movements using transparent soil models[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 137(5): 525-535.
[10]	LIU J, ISKANDER M G. Modelling capacity of transparent soil[J]. Canadian Geotechnical Journal, 2010, 47(4): 451-460.
[11]	AHMED M, ISKANDER M. Evaluation of tunnel face stability by transparent soil models[J]. Tunnelling and Underground Space Technology, 2012, 27(1): 101-110.
[12]	曹兆虎, 孔纲强, 刘汉龙, 等. 基于透明土材料的沉桩过程土体三维变形模型试验研究[J]. 岩土工程学报, 2014, 36(2): 395-400. (CAO Zhao-hu, KONG Gang-qiang, LIU Han-long, et.al. Model tests on 3-D soil deformation during pile penetration using transparent soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 395-400. (in Chinese))
[13]	齐昌广, 陈永辉, 王新泉, 等. 细长桩屈曲的透明土物理模型试验研究[J]. 岩石力学与工程学报, 2015, 36(4): 838-848. (QI Chang-guang, CHEN Yong-hui, WANG Xin-quan, et al. Physical modeling experiment on buckling of slender piles in transparent soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 36(4): 838-848. (in Chinese))
[14]	吴跃东, 罗如平, 刘坚, 等. 基于透明土的取土管贯入扰动变形试验研究[J]. 岩土工程学报, 2016, 38(8): 1507-1512. (WU Yue-dong, LUO Ru-ping, LIU Jian, et al. Research on soil disturbance deformation induced by sampler tube penetration based on transparent soil[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(8): 1507-1512. (in Chinese))

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