On how to accurately testing compressive strength of soils under low confining pressure

被引：0

作者：

Li X. ^{[1
]}

Ling X. ^{[2
]}

Wang F. ^{[1
]}

Mi Z. ^{[1
]}

Zhan X. ^{[1
]}

机构：

[1] Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing

[2] College of Overseas Education, Nanjing Tech University, Nanjing

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2023年 / 45卷

关键词：

low confining pressure; measuring range; piston friction; rubber membrane; triaxial test;

D O I：

10.11779/CJGE2023S10023

中图分类号：

学科分类号：

摘要：

It is important to study the stress deformation and stability of foundation by accurately testing the strength index of soils. For the triaxial tests under low confining pressures (less than 100 kPa), the influences of the piston friction and the rubber membrane can not be ignored. At the same time, the test accuracy and measuring range of equipments are also the important factors that should be considered. This study attempts to explore the influences of factors such as the piston friction and the rubber membrane on the test results by carrying out unconfined compressive strength tests under different conditions and triaxial consolidated undrained shear tests of different equipments, and to explore how to measure the compressive and shear strengths of samples according to the existing test conditions, so as to provide reliable data for design, construction and numerical calculation. In view of the shortcomings of domestic triaxial test equipments, reasonable suggestions are put forward, and it is expected that the triaxial test equipments should be further transformed and upgraded from mechanical manufacturing so as to promote the researches and development of precise triaxial test equipments in China. © 2023 Chinese Society of Civil Engineering. All rights reserved.

引用

页码：148 / 152

页数：4

共 13 条

[1]

NING Zuoliang, CHEN Gang, CHEN Xu, Development and application of multiaxial testing technique, Journal of Mechanical Engineering, 57, 16, pp. 16-36, (2021)

[2]

CAI Zhengyin, ZHOU Honglei, CAI Guojun, Et al., Review of the geotechnical testing and exploration techniques, China Civil Engineering Journal, 53, 5, pp. 100-117, (2020)

[3]

GUO Wanli, ZHU Jungao, WANG Junjie, Et al., Research progress on static properties and laboratory testing technology of coarse-grained soil, Chinese Journal of Rock Mechanics and Engineering, 39, S2, pp. 3570-3585, (2020)

[4]

XIAO Xiao, FENG Xiuli, LIN Lin, Et al., An experimental research of vibration pore water pressure of remolded silt under low confining pressure: a case from Chengbei Sea area, Marine Geology & Quaternary Geology, 40, 4, pp. 214-222, (2020)

[5]

GU L L, WANG Z, HOSOYA A H, Et al., Dilatancy and liquefaction behaviour of clean sand at wide range of confining stresses, Journal of Central South University, 27, 8, pp. 2394-2407, (2020)

[6]

NIE Rusong, DONG Junli, CHENG Longhu, Et al., The study on static triaxial test of heavy haul railway filler of subgrade roadbed under low confining pressure, Journal of Railway Science and Engineering, 16, 11, pp. 2707-2715, (2019)

[7]

FANG Dihua, XIA Huaizu, Influence of piston friction and rubber membrane in triaxiao tests, Hydropower Automation and Dam Monitoring, 5, pp. 27-32, (1989)

[8]

GUO Aiguo, QIAN Pingyi, Corrections for influence of membrane restraint in triaxial test, Rock and Soil Mechanics, 23, 4, pp. 442-445, (2002)

[9]

XIAO Jie, YANG Heping, LIN Jingsong, Et al., Simulating wet-dry cycles and low confining pressures triaxial test on expansive soil, China Journal of Highway and Transport, 32, 1, pp. 21-28, (2019)

[10]

FUKUSHIMA S, TATSUOKA F., Strength and deformation characteristics of saturated sand at extremely low pressures, Soils and Foundations, 24, 4, pp. 30-48, (1984)

← 1 2 →