Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (11): 3722-3729.doi: 10.16285/j.rsm.2020.0124

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Simplified calculation method for lateral pressure at rest in the under-consolidation stratum

QIAO Ya-fei1, 2, LU Xing-bang1, 2, HUANG Jun3, DING Wen-qi1, 2   

  1. Lots of practical projects have revealed that the accurate calculation of lateral pressure at rest in the under-consolidation stratum plays a crucial role in the stability analysis and safety design. Therefore, this paper investigates the evolution of lateral pressure at rest during consolidation in detail by theoretical analysis and numerical simulation. The relationship between the lateral pressure at rest and the overconsolidation ratio (OCR) is established, and a new method for calculating the lateral pressure at rest in the under-consolidation stratum is proposed. A new concept of equivalent earth pressure coefficient at rest is introduced in consideration of OCR effects. The proposed method is validated by the results of numerical simulation and laboratory tests. Moreover, the proposed equivalent earth pressure coefficient achieves a unified method for calculating the lateral pressure at rest in the both under-consolidation and normal consolidation stratums. The results reveal that the lateral pressure at rest in the under-consolidation stratum decreases linearly with the increase of OCR, and such OCR effect becomes more obvious as the effective friction angle of soil increases. The results of this paper could technically support the calculation of earth pressure in the under-consolidation stratum.
  • Received:2020-01-09 Revised:2020-04-13 Online:2020-11-11 Published:2020-12-25
  • Supported by:
    This work was supported by Shanghai Sailing Program (No.19YF1451400), the Consultancy and Research Project on Pits Group for Hengqi Port and Comprehensive Transportation Hub (CSCEC2B-SZ-HQKA-ZY-080).

PDF (Chinese)

187

Abstract: Lots of practical projects have revealed that the accurate calculation of lateral pressure at rest in the under-consolidation stratum plays a crucial role in the stability analysis and safety design. Therefore, this paper investigates the evolution of lateral pressure at rest during consolidation in detail by theoretical analysis and numerical simulation. The relationship between the lateral pressure at rest and the overconsolidation ratio (OCR) is established, and a new method for calculating the lateral pressure at rest in the under-consolidation stratum is proposed. A new concept of equivalent earth pressure coefficient at rest is introduced in consideration of OCR effects. The proposed method is validated by the results of numerical simulation and laboratory tests. Moreover, the proposed equivalent earth pressure coefficient achieves a unified method for calculating the lateral pressure at rest in the both under-consolidation and normal consolidation stratums. The results reveal that the lateral pressure at rest in the under-consolidation stratum decreases linearly with the increase of OCR, and such OCR effect becomes more obvious as the effective friction angle of soil increases. The results of this paper could technically support the calculation of earth pressure in the under-consolidation stratum.

Key words: under-consolidation soil, OCR, lateral pressure at rest, consolidation process, water pressure

CLC Number: 

  • TU 411
[1] ZHANG Feng-rui, JIANG An-nan, YANG Xiu-rong. Effect of pore water pressure on shear creep characteristics of serrate structural plane [J]. Rock and Soil Mechanics, 2020, 41(9): 2901-2912.
[2] ZHANG Xiao-ling, ZHU Dong-zhi, XU Cheng-shun, DU Xiu-li, . Research on p-y curves of soil-pile interaction in saturated sand foundation in weakened state [J]. Rock and Soil Mechanics, 2020, 41(7): 2252-2260.
[3] ZHANG Sheng, GAO Feng, CHEN Qi-lei, SHENG Dai-chao, . Experimental study of fine particles migration mechanism of sand-silt mixtures under train load [J]. Rock and Soil Mechanics, 2020, 41(5): 1591-1598.
[4] SHI Xu-chao, SUN Yun-de. Analysis of the evolution of excess pore water pressure in soft soil under linear unloading [J]. Rock and Soil Mechanics, 2020, 41(4): 1333-1338.
[5] 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.
[6] 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.
[7] XIAO Yao, DENG Hua-feng, LI Jian-lin, ZHI Yong-yan, XIONG Yu. The deterioration effect of fractured rock mass strengthened by grouting method under long-term immersion [J]. Rock and Soil Mechanics, 2019, 40(S1): 143-151.
[8] ZHANG Zhi-guo, HUANG Mao-song, YANG Xuan, . Analytical solution for dissipation of excess pore water pressure and soil consolidation settlement induced by tunneling under the influence of long-term leakage [J]. Rock and Soil Mechanics, 2019, 40(8): 3135-3144.
[9] MO Zhen-ze, WANG Meng-shu, LI Hai-bo, QIAN Yong-jin, LUO Gen-dong, WANG Hui, . Laboratory investigation on pore water pressure variation caused by filter cake effect during slurry-EPB shield tunneling in silty sand layer [J]. Rock and Soil Mechanics, 2019, 40(6): 2257-2263.
[10] HE Gui-cheng, LIAO Jia-hai, LI Feng-xiong, WANG Zhao, ZHANG Qiu-cai, ZHANG Zhi-jun. A coupled thermo- pore water-mechanical model for a weak interlayer in water saturated slope and its application [J]. Rock and Soil Mechanics, 2019, 40(5): 1663-1672.
[11] ZHANG Bo, LI Yao, YANG Xue-ying, ZHU Piao-yang, ZHU Chun-di, LIU Zi-hao, LIU Wen-jie, LUO Zhi-heng, . Design and application of a hydraulic pressure supply device for hydraulic fracturing experiments [J]. Rock and Soil Mechanics, 2019, 40(5): 2022-2028.
[12] XIA Tang-dai, ZHENG Qing-qing, CHEN Xiu-liang, . Predicting excess pore water pressure under cyclic loading with regular intervals based on cumulative dynamic deviator stress level [J]. Rock and Soil Mechanics, 2019, 40(4): 1483-1490.
[13] ZHU Jun-gao, JIANG Ming-jie, LU Yang-yang, JI En-yue, LUO Xue-hao, . Experimental study on influence of stress state on at-rest earth pressure coefficient for coarse grained soil [J]. Rock and Soil Mechanics, 2019, 40(3): 827-833.
[14] WANG Hua-bin, LI Jian-mei, JIN Yi-xuan, ZHOU Bo, ZHOU Yu, . The numerical methods for two key problems in rainfall-induced slope failure [J]. Rock and Soil Mechanics, 2019, 40(2): 777-784.
[15] DING Yu, CHEN Xiao-bin, ZHANG Jia-sheng, JIA Yu, . Experimental study of dynamic water pressure in transient saturated zone of red sandstone residual soil subgrade [J]. Rock and Soil Mechanics, 2019, 40(12): 4740-4750.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] ZHANG Li-ting, QI Qing-lan, WEI Jing HUO Qian, ZHOU Guo-bin. Variation of void ratio in course of consolidation of warping clay[J]. , 2009, 30(10): 2935 -2939 .
[2] ZHANG Qi-yi. Study of failure patterns of foundation under combined loading[J]. , 2009, 30(10): 2940 -2944 .
[3] 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 .
[4] HU Wei, HUANG Yi, LIU Zeng-rong. Testing and theoretical study of undrained shearing strength of saturated loess under cyclic loading[J]. , 2009, 30(10): 2996 -3000 .
[5] ZHANG Ming-yi, LIU Jun-wei， YU Xiu-xia. Field test study of time effect on ultimate bearing capacity of jacked pipe pile in soft clay[J]. , 2009, 30(10): 3005 -3008 .
[6] WU Liang, ZHONG Dong-wang, LU Wen-bo. Study of concrete damage under blast loading of air-decking[J]. , 2009, 30(10): 3109 -3114 .
[7] ZHOU Xiao-jie, JIE Yu-xin, LI Guang-xin. Numerical simulation of piping based on coupling seepage and pipe flow[J]. , 2009, 30(10): 3154 -3158 .
[8] WU Chang-yu, ZHANG Wei, LI Si-shen, ZHU Guo-sheng. Research on mechanical clogging mechanism of releaf well and its control method[J]. , 2009, 30(10): 3181 -3187 .
[9] CUI Hao-dong, ZHU Yue-ming. Back analysis of seepage field of Ertan high arch dam foundation[J]. , 2009, 30(10): 3194 -3199 .
[10] YANG You-lian，ZHU Jun-gao，YU Ting，WU Xiao-ming. Experimental study of mechanical behaviour of soil-structure interface by ring shear test[J]. , 2009, 30(11): 3256 -3260 .
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