Shear Characteristics of Interface between Silt and Soil Nail with Different Water Content

LI Yong-hui; YANG Jia-wang; WANG Tian-dong; GAO Jian-li

doi:10.11988/ckyyb.20230715

PDF(1441 KB)

Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (11) : 151-157. DOI: 10.11988/ckyyb.20230715

Rock-Soil Engineering

Shear Characteristics of Interface between Silt and Soil Nail with Different Water Content

Author information +

History +

Abstract

To study the relationship between shear stress and shear displacement at the nail-soil interface, as well as the variation of interfacial shear strength and apparent friction coefficient with changes in soil water content and stress state, a pull-out shear test was conducted on the interface between silt and nail under controlled water content in this paper. The results of the soil-nail interface shear test were compared with those of the soil-structure shear test. Additionally, a calculation analysis of the shear stress at the nail-soil interface was conducted. The results show that the shear stress at the nail-soil interface increases significantly with the increase in overburden pressure, and the pull-out displacement corresponding to the peak shear stress also increases gradually. Meanwhile, a softening phenomenon occurs after the shear stress reaches its peak. The shear stress at the soil interface is negatively correlated with the soil’s water content. The shear stress in the low water content silt test is almost double that of the saturated silt test, and the pull-out displacement corresponding to the peak shear stress also increases by about twofold. The peak and residual shear stresses increase approximately linearly with increasing overburden pressure, and decrease significantly with increasing soil water content (w). The difference between them decreases with increasing w, and increases with increasing overburden pressure. The research results can provide a reference for studying the pull-out bearing capacity of nails.

Key words

silt / water content / soil-nail / interface pull-out / shear characteristics

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

LI Yong-hui , YANG Jia-wang , WANG Tian-dong , et al. Shear Characteristics of Interface between Silt and Soil Nail with Different Water Content[J]. Journal of Yangtze River Scientific Research Institute. 2024, 41(11): 151-157 https://doi.org/10.11988/ckyyb.20230715

References

List( Publishing order | Descend order by publishing year | Descend order by cited within ) Chart analysis

[1]	SCHLOSSER F. Behaviour and Design of Soil Nailing[C]//Proceeding on Recent Developments in Ground Improvement Techniques, Bangkok, Thailand, 1982:399-413. Cited in this article [1]

[2]	STOCKER M F, KORBER G W, GASSLER G, et al. Soil Nailing[C]//International Conference on Soil Reinforcement. Paris: Ecole Nationale des Ponts et Chaussées (ENPC) Press,1979: 469-474. Cited in this article [1]

[3]	BRIDLE R J. Soil Nailing-Analysis and Design[J]. Ground Engineering, 1989, 22(6): 52-56. Cited in this article [1]

[4]	SHEN C K, HERRMANN L R, BANG S. Ground Movement Analysis of Earth Support System[J]. Journal of the Geotechnical Engineering Division, 1981, 107(12): 1609-1624. Cited in this article [1]

[5]	JURAN I, BAUDRAND G, KHALID F, et al. Kinematical Limit Analysis Approach for the Design of Nailed Soil Retaining Structures[C]//International Geotechnical Symposium on Theory and Practice of Earth Reinforcement, Fukuoka Kyushu, Japan. October 5-7, 1988:301-306. Cited in this article [1]

[6]	HONG C Y, YIN J H, PEI H F, et al. Experimental Study on the Pullout Resistance of Pressure-grouted Soil Nails in the Field[J]. Canadian Geotechnical Journal, 2013, 50(7): 693-704. Cited in this article [1]

[7]	WU J Y, ZHANG Z M. Evaluations of Pullout Resistance of Grouted Soil Nails[C]//Slope Stability, Retaining Walls, and Foundations. Reston, VA: American Society of Civil Engineers, July 2009. doi:10.1061/41049(356)17. Cited in this article [1]

[8]	CHEN C, ZHANG G, ZORNBERG J G, et al. Element Nail Pullout Tests for Prediction of Soil Nail Pullout Resistance in Expansive Clays[J]. Geotechnical Testing Journal, 2019, 42(5): 1274-1297. Cited in this article [1]

[9]	YE X, WANG S, ZHANG S, et al. The Compaction Effect on the Performance of a Compaction-grouted Soil Nail in Sand[J]. Acta Geotechnica, 2020, 15(10): 2983-2995. Cited in this article [1]

[10]	YIN J H, ZHOU W H. Influence of Grouting Pressure and Overburden Stress on the Interface Resistance of a Soil Nail[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(9): 1198-1208. Cited in this article [1]

[11]	HONG C Y, ZHANG Y F, GUO J W, et al. Experimental Study on the Influence of Drillhole Roughness on the Pullout Resistance of Model Soil Nails[J]. International Journal of Geomechanics, 2016, 16(2): 04015047. Cited in this article [1]

[12]	CHU L M, YIN J H. Comparison of Interface Shear Strength of Soil Nails Measured by both Direct Shear Box Tests and Pullout Tests[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2005, 131(9):1097-1107. Cited in this article [1]

[13]	GURPERSAUD N. The Influence of Matric Suction on the Pull-out Capacity of Grouted Soil Nails[D]. Ottawa: Carleton University, 2010. Cited in this article [1]

[14]	ZHANG G, CHEN C, ZORNBERG J G, et al. Interface Creep Behavior of Grouted Anchors in Clayey Soils: Effect of Soil Moisture Condition[J]. Acta Geotechnica, 2020, 15(8): 2159-2177. Cited in this article [1]

[15]	CHU L M, YIN J H. A Laboratory Device to Test the Pull-out Behavior of Soil Nails[J]. Geotechnical Testing Journal, 2005, 28(5): 499-513. Cited in this article [1]

[16]	CARTIER G, GIGAN J P. Experiments and Observations on Soil Nailed Structures[C]//Proceeding of the 8th European Conference of Soil Mechanics and Foundation Engineering, 1983:473-476. Cited in this article [1]

[17]	HEYMANN G, RHODE A W, Schwartz K, et al. Soil Nail Pull-out Resistance in Residual Soils[C]//Proceedings of the International Symposium on Earth Reinforcement Practice, Kyushu, Japan,November 11-13,1992:487-492. Cited in this article [1]

[18]	HEYMANN G. Soil Nailing Systems as Lateral Support for Surface Excavations[D]. Pretoria: University of Pretoria, 1993. Cited in this article [1]

[19]	BANDANA P. Study of Pullout Behaviour of Soil Nails in Completely Decomposed Granite Fill[J]. Geology, 2003,doi:10.5353/TH_B2932494. Cited in this article [5]

[20]	GB/T 50123—2019, 土工试验方法标准[S]. 北京: 中国计划出版社, 2019. (GB/T 50123—2019, Standard for geotechnical testing method[S]. Beijing: China Planning Press, 2019. (in Chinese)) Cited in this article [2]

[21]

张诚成, 朱鸿鹄, 周游, 等. 土钉拉拔机理的试验及理论研究进展[J]. 防灾减灾工程学报, 2013, 33(增刊1): 138-146.

(ZHANG

Cheng-cheng

, ZHU

Hong-Hu

, ZHOU

You

, et al. Experimental and Theoretical Research Progress of Soil Nailing Pull-out Mechanism[J]. Journal of Disaster Prevention and Mitigation Engineering, 2013, 33(Supp. 1): 138-146. (in Chinese))

Cited in this article [1]

[22]

苏立君, 张宜健, 殷建华, 等. 钻孔灌注型土钉抗拔性能的室内模型试验研究[J]. 西安建筑科技大学学报(自然科学版), 2011, 43(3): 342-346, 366.

(SU

Li-jun

, ZHANG

Yi-jian

, YIN

Jian-hua

, et al. Lab Physical Modeling Investigation on the Pull-out Resistance of Grouted Soil Nail[J]. Journal of Xi’an University of Architecture & Technology (Natural Science Edition), 2011, 43(3): 342-346, 366. (in Chinese))

Cited in this article [2]

[23]	HONG C Y, LIU Z X, ZHANG Y F, et al. Influence of Critical Parameters on the Peak Pullout Resistance of Soil Nails under Different Testing Conditions[J]. International Journal of Geosynthetics and Ground Engineering, 2017, 3(2): 19. Cited in this article [1]

[24]	SUKMAK K, SUKMAK P, HORPIBULSUK S, et al. Pullout Resistance of Bearing Reinforcement Embedded in Marginal Lateritic Soil at Molding Water Contents[J]. Geotextiles and Geomembranes, 2016, 44(3): 475-483. Cited in this article [3]

[25]	YIN J H, SU L J. An Innovative Laboratory Box for Testing Nail Pull-out Resistance in Soil[J]. Geotechnical Testing Journal, 2006, 29(6): 451-461. Cited in this article [1]

[26]	SU L J, CHAN T C F, SHIU Y K, et al. Influence of Degree of Saturation on Soil Nail Pull-out Resistance in Compacted Completely Decomposed Granite Fill[J]. Canadian Geotechnical Journal, 2007, 44(11):1314-1328. Cited in this article [1]

[27]	HAMID T B, MILLER G A. Shear Strength of Unsaturated Soil Interfaces[J]. Canadian Geotechnical Journal, 2009, 46(5): 595-606. Cited in this article [1]

[28]	CHU L M. Study on the Interface Shear Strength of Soil Nailing in Completely Decomposed Granite (CDG) Soil[D]. Hong Kong: The Hong Kong Polytechnic University, 2003. Cited in this article [1]

[29]	BABU G, SINGH V. Soil Nails Field Pullout Testing: Evaluation and Applications[J]. International Journal of Geotechnical Engineering, 2010, 4(1): 13-21. Cited in this article [1]

[30]	SEO H J, JEONG K H, CHOI H, et al. Pullout Resistance Increase of Soil Nailing Induced by Pressurized Grouting[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2012, 138(5): 604-613. Cited in this article [1]

[31]	卢宁, LIKOS W J. 非饱和土力学[M]. 韦昌富,侯龙,简文星,译. 北京: 高等教育出版社, 2012. (LU Ning, LIKOS W J. Unsaturated Soil Mechanics[M]. Translated by WEI Chang-fu,HOU Long,JIAN Wen-xing. Beijing: Higher Education Press, 2012. (in Chinese)) Cited in this article [2]

[32]	GADELMAWLA E S, KOURA M M, MAKSOUD T M A, et al. Roughness Parameters[J]. Journal of Materials Processing Technology, 2002, 123(1): 133-145. Cited in this article [1]

[33]	YOSHIMI Y, KISHIDA T. Friction Between Sand and Metal Surface[C]//Proceedings of the 10th International Conference on Soil Mechanics and Foundation Engineering, Stockholm, Sweden. 15 June,1981: 831-834. Cited in this article [1]

[34]	UESUGI M, KISHIDA H. Frictional Resistance at Yield between Dry Sand and Mild Steel[J]. Soils and Foundations, 1986, 26(4): 139-149. Cited in this article [1]

[35]	ISAEV O N, SHARAFUTDINOV R F. Soil Shear Strength at the Structure Interface[J]. Soil Mechanics and Foundation Engineering, 2020, 57(2): 139-146. Cited in this article [1]

[36]	JUNAIDEEN S M, THAM L G, LAW K T, et al. Laboratory Study of Soil-nail Interaction in Loose, Completely Decomposed Granite[J]. Canadian Geotechnical Journal, 2004, 41(2): 274-286. Cited in this article [2]

[37]	ZHOU W H. Experimental and Theoretical Study on Pullout Resistance of Grouted Soil Nails[D]. Hong Kong: Hong Kong Polytechnic University, 2008. Cited in this article [1]

[38]

郭聚坤, 寇海磊, 许泓霖, 等. 桩-海洋黏土界面剪切性状试验研究[J]. 长江科学院院报, 2019, 36(4): 104-108, 117.

https://doi.org/10.11988/ckyyb.20171138

Abstract

桩-土界面剪切性状制约着桩基受力特性,对研究桩-土相互作用机理具有重要意义。利用改进后的直剪仪,进行海洋黏土与钢板、混凝土板的界面剪切试验,研究不同含水率、不同固结时间的海洋黏土与钢、混凝土界面的剪切应力-剪切位移关系。结果表明:界面剪切应力-剪切位移关系表现出较好的弹塑性关系,可用双曲线模型表示;随着法向应力增大、含水率减小和固结时间增长,界面峰值剪切应力增大,所需峰值剪切位移增加,峰值剪应力的增加集中在固结开始后的14 d内;界面摩擦角和界面黏聚力随含水率增加而减小,界面摩擦角受固结时间影响不大,集中在20°～23°范围内,界面黏聚力随固结时间增加而增大,且集中在固结开始后的14 d内。研究成果可为海洋桩基工程沉桩阶段阻力估算及数值模拟提供参考。

(GUO

Ju-kun

, KOU

Hai-lei

, XU

Hong-lin

, et al. Experimental Study on Shear Behaviors of Interface between Pile and Marine Clay[J]. Journal of Yangtze River Scientific Research Institute, 2019, 36(4): 104-108, 117. (in Chinese))

https://doi.org/10.11988/ckyyb.20171138

Abstract

The mechanical behaviors of pile foundation are restricted by the shear behavior of pile-soil interface which is of importance for the study of pile-soil interaction mechanism. In this research, shear tests on marine clay-steel interface and marine clay-concrete interface were conducted via an improved direct shear apparatus to investigate the relationship between shear stress and shear displacement of interface with varied water content and consolidation time. Results indicate that relationship between shear stress and shear displacement of interface displayed good elastic-plasticity which can be expressed by hyperbolic model. The peak shear stress and displacement of interface increased with the climbing of normal stress, the declining of water content and the extension of consolidation time. The increment of peak shear stress concentrated within 14 days after consolidation. Moreover, the friction angle and cohesive force of interface decreased with the climbing of water content. Consolidation time had little influence on the friction angle of interface which concentrated in the range from 20 degrees to 23 degrees. The cohesive force of interface increased with the increasing of consolidation time, and such increment concentrated within 14 days after the initiation of consolidation. The research findings provide reference for estimating the resistance during the pile driving stage and for numerical simulation of marine pile foundation engineering.