Development and Application of a Triaxial Model Test System for Pile-Soil Interface

doi:10.16183/j.cnki.jsjtu.2014.11.004

Abstract

Abstract:

Unloading effect of the deep excavation would decrease the pile's bearing capacity and increase the tensile in pile shaft. A novel test system which can control the soil stress state was developed to study the pile-soil interactive behavior. In this novel system, the normal stress on the pile-soil interface is applied by the air pressure in the triaxial cell. The soil stress along the pile axis and the movement of model pile are controlled by the double piston. The pore pressure and water flow in the soil sample are adjusted by the two water cannels on the test cell. With the monitoring part of the system, the total shear force on the interface, the relative movement of the pile, and the deformation of the soil layer can be measured during tests. The triaxial interface tests show that the limit friction resistance and friction coefficient increase with the increase of the confining pressure, and the displacement of soil also increases with the increase of the confininig pressure.

Key words: unloading, pile-soil interface, triaxial apparatus, model test, stress state

CLC Number:

TU411

WU Jun-jie, LIU Shuai-jun, CHEN Jin-jian, WANG Jian-hua. Development and Application of a Triaxial Model Test System for Pile-Soil Interface[J]. Journal of Shanghai Jiao Tong University, 2014, 48(11): 1523-1527,1535.

Figures/Tables 6

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Tab. 1

Fig. 5

References 12

[1]	陈锦剑, 王建华, 范巍, 等. 抗拔桩在大面积深开挖过程中的受力特性分析[J]. 岩土工程学报, 2009, 31(3): 402-407.
	CHEN Jin-jian, WANG Jian-hua, FAN Wei, et al. Behavior of up-lift pile foundation during large-scale deep excavation[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(3): 402-407.
[2]	陈锦剑, 吴琼, 王建华, 等. 开挖卸荷条件下单桩承载力特性的模型试验研究[J]. 岩土工程学报, 2010, 32(S2): 85-88.
	CHEN Jin-jian, WU Qiong, WANG Jian-hua, et al. Model tests on bearing capacity of single pile influenced by excavation[J]. Chinese Journal of Geotechnical Engineering, 32(S2): 85-88.
[3]	Mortara G, Ferrara D, Fotia G. Simple model for the cyclic behavior of smooth sand-steel interfaces[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 136(7): 1004-1009.
[4]	冯大阔, 侯文峻, 张建民. 粗粒土与结构接触面三维力学特性的直剪试验研究[J]. 土木工程学报, 2012, 45(5): 169-175.
	FENG Da-kuo, HOU Wen-jun, ZHANG Jian-min. Large-scale direct shear test investigation of the 3D behavior of a gravel-structure interfaces[J]. China Civil Engineering Journal, 2012, 45(5): 169-175.
[5]	王伟, 卢廷浩, 宰金珉, 等. 土与混凝土接触面反向剪切单剪试验[J]. 岩土力学, 2009, 30(5): 1303-1306.
	WANG Wei, LU Ting-hao, ZAI Jin-min, et al. Negative shear test on soil-concrete interface using simple shear apparatus[J]. Rock and Soil Mechanics, 2009, 30(5): 1303-1306.
[6]	彭凯, 朱俊高, 冯树荣, 等. 水泥土泥皮下土与结构接触面的单剪特性[J]. 重庆大学学报, 2013, 36(8): 127-135.
	PENG Kai, ZHU Jun-gao, FENG Shu-rong, et al. Study on mechanical behaviours of interface with cemented soil slurry between gravel and concrete by simple shear tests[J]. Journal of Chongqing University, 2013, 36(8): 127-135.
[7]	朱俊高, Shakir R R, 杨有莲, 等. 土与混凝土接触面特性环剪单剪试验比较研究[J]. 岩土力学, 2011, 32(3): 692-696.
	ZHU Jun-gao, Shakir R R, YANG You-lian, et al. Comparison of behaviors of soil-concrete interface from ring-shear and simple shear tests[J]. Rock and Soil Mechanics, 2011, 32(3): 692-696.
[8]	Vogelsang J, Huber G, Triantafyllidis T. A largescale soil-structure interface testing device[J]. Geotechnical Testing Journal, 2013, 36(5): 111-123.
[9]	张建民, 侯文峻, 张嘎, 等. 大型三维土与结构接触面试验机的研制与应用[J]. 岩土工程学报, 2008, 30(6): 889-894.
	ZHANG Jian-min, HOU Wen-jun, ZHANG Ga, et al. Development of a 3Dsoil-structure interface test apparatus and its application[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(6): 889-894.
[10]	楼晓明, 李德宁, 杨敏, 等. 土体常规加卸荷对桩基影响模型试验系统研制与应用[J]. 岩土工程学报, 2012, 34(8): 1509-1515.
	LOU Xiao-ming, LI De-ning, YANG Min, et al. Development and application of simulation system for model piles impacted by routine loading and unloading of soil[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1509-1515.
[11]	杨敏, 李德宁, 楼晓明. 土体三轴加卸荷对桩基影响模型试验系统研制与应用[J]. 岩石力学与工程学报, 2013, 32(2): 411-416.
	YANG Min, LI De-ning, LOU Xiao-ming. Development and application of simulation system for model piles impacted by soil triaxial loading and unloading[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(2): 411-416.
[12]	张治军, 饶锡保. 不同含水率泥皮对接触面力学特性影响的试验研究[J]. 长江科学院院报, 2007, 24(5): 60-64.
	ZHANG Zhi-jun, RAO Xi-bao. Influence of slurry with different water capacities on behavior of gravel-structure interface[J]. Journal of Yangtze River Scientific Research Institute, 2007, 24(5): 60-64.

No．	围压σ₃／kPa	极限摩阻力f_s／kPa	摩擦系数μ
1	50	17.2	0.34
2	80	35.5	0.44
3	100	54.1	0.54
4	120	62.6	0.52

[1]	ZHAO Guangyi, ZHANG Mengmeng, FU Shixiao, XU Yuwang, REN Haojie, BAI Yingli. Experimental Study on Vortex-Induced Vibration Force Characteristics of Side-by-Side Double Free-Hanging Water Transmission Pipes Under Uniform Flow [J]. Journal of Shanghai Jiao Tong University, 2025, 59(8): 1067-1080.
[2]	NI Pinghu, CHEN Silin, FAN Xiangbin, et al. Safety Assessment of Large Structures Hoisting and Unloading from Vessels [J]. Ocean Engineering Equipment and Technology, 2025, 12(4): 77-82.
[3]	CHEN Pengyu, ZHU Yiming, XIE Xiaomin. Simulation and Experimental Study on Yawing Motion Characteristic for Single-Anchor Mooring Ships [J]. Ocean Engineering Equipment and Technology, 2025, 12(3): 87-93.
[4]	ZHENG Mao, DING Shigan, LAN Jiafen. Maneuvering Motion Modeling of Unconventional Ship Based on Numerical Calculation [J]. Journal of Shanghai Jiao Tong University, 2025, 59(12): 1824-1836.
[5]	LIU Shuxiang1, DING Yong1, WANG Yilin2, LI Sa2. Testing Study on Horizontal Capacity Characteristics of Jack-Ups [J]. Ocean Engineering Equipment and Technology, 2025, 12(1): 74-78.
[6]	SONG Junlin, LIU Bo, TANG Liheng, LIAO Chencong. Centrifuge Tests on Vertical Bearing Capacity of Jacket Pile Foundation in Clay Seabed Under Different Grouting Effects [J]. Journal of Shanghai Jiao Tong University, 2025, 59(1): 38-47.
[7]	LI Xu, XIAO Longfei, WEI Handi, WU Wencheng, ZHU Ziyang, LI Yan. Inverse Reconstruction of Environmental Loads and Virtual Model Test [J]. Journal of Shanghai Jiao Tong University, 2024, 58(2): 141-146.
[8]	LIU Dongxi, MA Renjie, CAI Wenjuan, LU Tianze. Experimental Study of Three-Dimensional Swirling Sloshing of Free Surface in Vertical Cylindrical Tank [J]. Journal of Shanghai Jiao Tong University, 2024, 58(11): 1665-1673.
[9]	YAO Rulin, FAN Qidong, YU Long, WANG Xuefeng. Numerical and Testing Analysis of Fin Stabilizers of A Medium Sized Cruise Ship with Overset Grids [J]. Journal of Shanghai Jiao Tong University, 2023, 57(S1): 178-184.
[10]	BI Jianwei, SU Lei, XIE Libo, ZHANG Yu, LING Xianzhang. Experimental Investigation of Dynamic Response of Pile-Supported Wharf in Liquefiable Ground Under Wave Action [J]. Journal of Shanghai Jiao Tong University, 2023, 57(11): 1442-1454.
[11]	LIU Jinhao, YAN Yuanzhong, ZHANG Qi, BIAN Rong, HE Lei, YE Guanlin. Centrifugal Test and Numerical Analysis of Impact of Surface Surcharge on Existing Tunnels [J]. Journal of Shanghai Jiao Tong University, 2022, 56(7): 886-896.
[12]	HUANG Chengjun, ZHU Tianyi, SONG Xiaobing. In-Plane Yield Criterion of Steel-Concrete-Steel Unit Panel [J]. Journal of Shanghai Jiao Tong University, 2022, 56(4): 422-430.
[13]	DING Shifeng (丁仕风), ZHOU Li∗ (周利), GU Yingjie (顾颖杰), ZHOU Yajun (周亚军). Modification Method of Longitudinal Bow Structure for Ice-Strengthened Merchant Ship [J]. J Shanghai Jiaotong Univ Sci, 2022, 27(3): 298-306.
[14]	YE Xinghong (叶星宏), XIA Lijuan∗ (夏利娟). Experimental Investigation and Numerical Simulation of Ship Stern Structural Vibration Model [J]. J Shanghai Jiaotong Univ Sci, 2022, 27(3): 365-374.
[15]	ZHANG Chenya, KOU Yufeng, LÜ Haining, XIAO Longfei, LIU Mingyue. Comparative Test of Characteristics of Vortex-Induced Motion and Galloping of Classic Spar Platform [J]. Journal of Shanghai Jiao Tong University, 2021, 55(5): 497-504.