Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (3): 773-780.doi: 10.16285/j.rsm.2019.0430

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Comparative experimental study on static shear strength and postcyclic strength of saturated silty clay

LIU Jian-min1, 2, QIU Yue3, GUO Ting-ting1, 2, SONG Wen-zhi4, GU Chuan5   

  1. 1. Shandong Earthquake Agency, Jinan, Shandong 250014, China; 2. Shandong Institute of Earthquake Engineering, Jinan, Shandong 250021, China; 3. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 4. China MCC20 Group Corp. Ltd., Shanghai 201999, China; 5. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
  • Received:2019-02-27 Revised:2019-08-23 Online:2020-03-11 Published:2020-05-25
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51578426, 51809160), Shandong Provincial Natural Science Foundation(ZR201702160366), Shandong Earthquake Agency Important Fund Foundation(JJ1801), Shandong Earthquake Agency Youth Fund Foundation(JJ1806Y) and the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents(2017RCJJ004).

PDF (Chinese)

185

Abstract: Based on the large-distributed silty clay in the impact basin of the lower Yellow River, the dynamic triaxial apparatus and the strain controlled triaxial apparatus were conducted to investigate the undrained shear strength of the silty clay after vibration under different confining pressures and over-consolidated ratios. It is shown that the shear behavior of the sample after vibration is similar to that under over-consolidated state. Compared with the shear behavior before vibration, it can be found that the vibration has little influence on the shear strength when the similar over-consolidated ratio (SOCR) is less than 1.25; while SOCR is larger than 1.25, the shear strength of the sample decreases rapidly and the failure pore pressure ratio decreases firstly and then increases. By comparing the shear strength after unloading under the different SOCR and the same confining pressures, it can be concluded that the shear strength increases with the over-consolidated ratio (OCR) by exponential relation. And the increase of the shear strength caused by SOCR is more obvious than OCR. In addition, the shear strength ratio also increases with the increase of the SOCR and the OCR. Therefore, the OCR can be adopted to evaluate the foundation strength after dynamic load if it is difficult to carry out dynamic test in practice.

Key words: silty clay, vibration loading, over-consolidated ratio, similar over-consolidated ratio, pore pressure, shear strength

CLC Number: 

  • TU 411
[1] FAN Xiang, DENG Zhi-ying, CUI Zhi-meng, HE Zhong-ming, LIN Hang, . A new peak shear strength model for soft-hard joint [J]. Rock and Soil Mechanics, 2021, 42(7): 1861-1870.
[2] WANG Bin, HAN You-ming, ZHOU Xin, CHEN Cheng, ZHANG Xian-wei, GUI Lei, . In-situ test of shear modulus decay characteristics of lacustrine clay layer in Taihu Lake [J]. Rock and Soil Mechanics, 2021, 42(7): 2031-2040.
[3] WANG Jia-hui, RAO Xi-bao, JIANG Ji-wei, YAO Jin-song, XIONG Shi-hu, LU Yi-wei, LI Hao-min, . Model experimental study of the shear mechanism of vibroflotation stone column composite foundation [J]. Rock and Soil Mechanics, 2021, 42(4): 1095-1103.
[4] YANG Ai-wu, YANG Shao-peng, LANG Rui-qing, CHEN Zi-he, . Three-dimensional mechanical properties of light solidified saline soil [J]. Rock and Soil Mechanics, 2021, 42(3): 593-600.
[5] LU Feng, QIU Wen-ge, . A multiparameter non-proportional shear strength reduction method for slope stability analysis based on energy evolution theory [J]. Rock and Soil Mechanics, 2021, 42(2): 547-557.
[6] ZHAN Liang-tong, SUN Qian-qian, GUO Xiao-gang, CHEN Rui, CHEN Yun-min, . Estimation of undrained shear strength of completely decomposed granite waste during rapid landfilling [J]. Rock and Soil Mechanics, 2021, 42(1): 50-58.
[7] HUANG Chao-xuan, YUAN Wen-xi, HU Guo-jie, . An estimation method of horizontal bearing capacity of piles after pre-consolidation treatment for layered soft foundation [J]. Rock and Soil Mechanics, 2021, 42(1): 113-124.
[8] LIU Jie, YANG Yu-hua, YAO Hai-lin, LU Zheng, YUE Chan, . Experimental study on treatment of dispersive clay based on different modification methods [J]. Rock and Soil Mechanics, 2020, 41(S1): 163-170.
[9] ZOU Xian-jian, WANG Yi-teng , WANG Chuan-ying, . Three-dimensional morphological feature of rock structural surfaces and dominant anti-slip direction using the borehole images [J]. Rock and Soil Mechanics, 2020, 41(S1): 290-298.
[10] ZHANG Tian-long, ZENG Peng, LI Tian-bin, SUN Xiao-ping, . System reliability analyses of slopes based on active-learning radial basis function [J]. Rock and Soil Mechanics, 2020, 41(9): 3098-3108.
[11] YU Lu, YANG Qing, YANG Gang, ZHANG Jin-li. Analysis of the resistance of elliptical tip of torpedo anchor by plastic limit analysis [J]. Rock and Soil Mechanics, 2020, 41(6): 1953-1962.
[12] CHENG Tao, YAN Ke-qin, HU Ren-jie, ZHENG Jun-jie, ZHANG Huan, CHEN He-long, JIANG Zhi-jie, LIU Qiang, . Analytical method for quasi-two-dimensional plane strain consolidation problem of unsaturated soil [J]. Rock and Soil Mechanics, 2020, 41(2): 453-460.
[13] FAN Ke-wei, LIU Si-hong, LIAO Jie, FANG Bin-xin, WANG Jian-lei, . Experimental study on shearing characteristics of pebbles-filled soilbags [J]. Rock and Soil Mechanics, 2020, 41(2): 477-484.
[14] TU Yuan, WANG Kui-hua, ZHOU Jian, HU An-feng, . Application of effective stress method and effective consolidation stress method for strength calculation in preloading ground [J]. Rock and Soil Mechanics, 2020, 41(2): 645-654.
[15] TU Yi-liang, LIU Xin-rong, REN Qing-yang, CHAI He-jun, WANG Jun-bao, YU Jia-yu, . Effects of rock contents and particle breakage on strength characteristics of soil-rock aggregate [J]. Rock and Soil Mechanics, 2020, 41(12): 3919-3928.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] LIU Xiao，TANG Hui-ming，LIU Yu. A new model for landslide displacement prediction based on set pair analysis and fuzzy-Markov chain[J]. , 2009, 30(11): 3399 -3405 .
[2] SHI Xu-chao，HAN Yang. Water absorption test of soft clay after rebound under unloading[J]. , 2010, 31(3): 732 -736 .
[3] ZHU Jian-ming，PENG Xin-po，YAO Yang-ping，XU Jin-hai. Application of SMP failure criterion to computing limit strength of coal pillars[J]. , 2010, 31(9): 2987 -2990 .
[4] YUAN Xi-zhong, LI Ning , ZHAO Xiu-yun, YANG Yin-tao. Analysis of sensitivity of frozen ground bearing capacity to climate change in Northeast China permafrost regions[J]. , 2010, 31(10): 3265 -3272 .
[5] BAI Bing, LI Xiao-chun, SHI Lu, TANG Li-zhong. Slope identity of elastoplastic stress-strain curve and its verification and application[J]. , 2010, 31(12): 3789 -3792 .
[6] TANG Li-min. Regularization algorithm of foundation settlement prediction model[J]. , 2010, 31(12): 3945 -3948 .
[7] LI Zhan-hai，ZHU Wan-cheng，FENG Xia-ting，LI Shao-jun，ZHOU Hui，CHEN Bing-rui. Effect of lateral pressure coefficients on damage and failure process of horseshoe-shaped tunnel[J]. , 2010, 31(S2): 434 -441 .
[8] SONG Ling　, LIU Feng-yin　, LI Ning　. On mechanism of rotary cone penetration test[J]. , 2011, 32(S1): 787 -0792 .
[9] JIN Jie-fang , LI Xi-bing , YIN Zhi-qiang , ZOU Yang. A method for defining rock damage variable by wave impedance under cyclic impact loadings[J]. , 2011, 32(5): 1385 -1393 .
[10] ZHOU Yan-jun , GENG Ying-chun , WANG Gui-bin , TANG Hong-lin , LI Zu-kui. Testing and analyzing rock mechanical characteristics for deep formation[J]. , 2011, 32(6): 1625 -1630 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd