›› 2015, Vol. 36 ›› Issue (2): 320-324.doi: 10.16285/j.rsm.2015.02.003

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A hyperbolic rheological model for one-dimensional secondary consolidation of soft soils

YU Xiang-juan1, 2, YIN Zong-ze1, 2, GAO Lei1, 2   

  1. 1. Key Laboratory of Geomechanics and Embankment Engineering, Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, China
  • Received:2013-10-29 Online:2015-02-11 Published:2018-06-13

PDF (Chinese)

1853

Abstract: The secondary consolidation of soft soil is very important for the deformation of soft soil. In the calculation of secondary consolidation of soft soil, the secondary consolidation coefficient is usually used as a calculation parameter, but this coefficient does not reflect the impact of variation for loading, and it can only apply to the normally consolidated clay. The over-consolidated clay is mostly encountered in many engineering projects. The laboratory experiments are conducted to study the secondary consolidation settlement of soft soil. The consolidation test is carried out on multiple sets of undisturbed soft clay samples. The test results show that for the calculation of secondary consolidation of soft soil, the secondary consolidation should be studied from the aspects of the strain and time; a hyperbolic form fitting is used; the strain parameters for the normally consolidated and over-consolidated soil are analyzed to establish a one-dimensional model of secondary consolidation of empirical formula. A secondary consolidation settlement calculation method is proposed considering the pressure effect on the secondary compression; the method is applied to the engineering project. It is validated that the method can be applied to the normally consolidated and over consolidated soil; it makes the consolidation of soft soil subsidence calculation more approaching the actual engineering problems.

Key words: soft soil, secondary consolidation strain, pressure, normal consolidation, over consolidation, rheological model

CLC Number: 

  • TU 447
[1] WEI Gang, ZHANG Xin-hai, LIN Xin-bei, HUA Xin-xin, . Variations of transverse forces on nearby shield tunnel caused by foundation pits excavation [J]. Rock and Soil Mechanics, 2020, 41(2): 635-644.
[2] HE Zhi-jun, LEI Hao-cheng, XIA Zhang-qi, ZHAO Lian-heng. Analysis of settlement and internal force displacement of single pile in multilayer soft soil foundation [J]. Rock and Soil Mechanics, 2020, 41(2): 655-666.
[3] WANG Guo-hui, CHEN Wen-hua, NIE Qing-ke, CHEN Jun-hong, FAN Hui-hong, ZHANG Chuan, . Impacts of pit excavation on foundation piles in deep silty soil by centrifugal model tests [J]. Rock and Soil Mechanics, 2020, 41(2): 399-407.
[4] CHEN He, ZHANG Yu-fang, ZHANG Xin-min, WEI Shao-wei, . Full-scale model experiments on anti-sliding characteristics of high-pressure grouting steel-tube micropiles [J]. Rock and Soil Mechanics, 2020, 41(2): 428-436.
[5] 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.
[6] WU Qi, DING Xuan-ming, CHEN Zhi-xiong, CHEN Yu-min, PENG Yu, . Seismic response of pile-soil-structure in coral sand under different earthquake intensities [J]. Rock and Soil Mechanics, 2020, 41(2): 571-580.
[7] LIU Zhong-yu, XIA Yang-yang, ZHANG Jia-chao, ZHU Xin-mu. One-dimensional elastic visco-plastic consolidation analysis of saturated clay considering Hansbo’s flow [J]. Rock and Soil Mechanics, 2020, 41(1): 11-22.
[8] XIA Cai-chu, YU Qiang-feng, QIAN Xin, GUI Yang, ZHUANG Xiao-qing. Experimental study of shear-seepage behaviour of rock joints under constant normal stiffness [J]. Rock and Soil Mechanics, 2020, 41(1): 57-66.
[9] YANG Fu-jian, HU Da-wei, TIAN Zhen-bao, ZHOU Hui, LU Jing-jing, LUO Yu-jie, GUI Shu-qiang, . Evolution and mechanism of permeability of unconsolidated sandstone under high hydrostatic pressure compaction [J]. Rock and Soil Mechanics, 2020, 41(1): 67-77.
[10] YU Li, LÜ Cheng, DUAN Ru-yu, WANG Ming-nian, . Upper bound limit analysis of three-dimensional collapse mechanism of shallow buried soil tunnel under pore pressure based on nonlinear Mohr-Coulomb criterion [J]. Rock and Soil Mechanics, 2020, 41(1): 194-204.
[11] YU Ting, SHAO Lei. Study of dynamic characteristics of dam foundation on deep riverbed overburden with soft soil layer [J]. Rock and Soil Mechanics, 2020, 41(1): 267-277.
[12] LIU Quan-sheng, LUO Ci-you, ZHU Yuan-guang, JIANG Jing-dong, LIU He, PENG Xing-xin, PAN Yu-cong, . Research on orientation layout of pressure sensing units by rheological stress recovery method [J]. Rock and Soil Mechanics, 2020, 41(1): 336-341.
[13] ZHANG Ding-wen, LIU Zhi-xiang, SHEN Guo-gen, E Jun-yu, . Measurement of earth pressure of shallow buried tunnel with super large diameter and applicability evaluation of calculation method [J]. Rock and Soil Mechanics, 2019, 40(S1): 91-98.
[14] PENG Shou-jian, GUO Shi-chao, XU Jiang, GUO Chen-ye, ZHANG Chao-lin, JIA Li, . Impacts of mining-induced stress concentration on coal-bed methane drainage in boreholes parallel with bedding [J]. Rock and Soil Mechanics, 2019, 40(S1): 99-108.
[15] DAI Guo-liang, ZHU Wen-bo, GUO Jing, GONG Wei-ming, ZHAO Xue-liang, . Experiments on vertical uplift bearing capacity of suction caisson foundation in soft clay [J]. Rock and Soil Mechanics, 2019, 40(S1): 119-126.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] CHU Xi-hua, XU Yuan-jie. Studies on transformation from M-C criterion to Drucker-Prager criterions based on distortion energy density[J]. , 2009, 30(10): 2985 -2990 .
[2] LIU Dou-dou, CHEN Wei-zhong, YANG Jian-ping, TAN Xian-jun, ZHOU X. Experimental research on strength characteristic of brittle rock unloading confining pressure[J]. , 2009, 30(9): 2588 -2594 .
[3] WANG Gui-yao，LI Bin，LUO Jun，FU Hong-yuan. Study of soil-water charactiristics and matric suction measurement device for unsaturated silty soil[J]. , 2010, 31(11): 3678 -3682 .
[4] LU Ying-fa, CHENG Zhu-lei, XIE Wen-liang, Lü Zhi-zhong. Application of geotechnics to sanitation landfill of refuse[J]. , 2009, 30(1): 91 -98 .
[5] WANG Zhi-ping，HU Min-yun，XIA Ling-tao. Research on compressibility of municipal solid waste by laboratory tests[J]. , 2009, 30(6): 1681 -1686 .
[6] JIA Qiang, YING Hui-qing, ZHANG Xin. Construction of basement in existing buildings by static bolt-pile[J]. , 2009, 30(7): 2053 -2057 .
[7] LU Jun-fu，WANG Ming-nian，JIA Yuan-yuan，YU Yu， TAN Zhong-sheng. Research on construction time of secondary lining of large section loess tunnel for high-speed railway[J]. , 2011, 32(3): 843 -848 .
[8] WANG Cheng-hua, AN Jian-guo. Numerical analyses of vertical bearing capacity of foundations with enlarged pile group[J]. , 2011, 32(S2): 580 -585 .
[9] FANG Tao , LIU Xin-rong , GENG Da-xin , LUO Zhao , JI Xiao-tuan , ZHENG Ming-xin . Model testing study of vertical bearing behaviors for large diameter pile with variable cross-section (I)[J]. , 2012, 33(10): 2947 -2952 .
[10] HU Wan-yu ，CHEN Xiang-hao ，LIN Jiang ，KUANG Lei-qiang . In-situ drilling tests of seepage in gravel soil core wall during the first impoundment in Pubugou hydropower station[J]. , 2013, 34(5): 1259 -1263 .
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