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| Experimental Study on the Dynamic Characteristic of Soft Soil under Cyclic Loads |
| LIU Jia-shun1, ZHANG Xiang-dong1, ZHANG Hu-wei2 |
1. School of Civil Engineering and Transportation, Liaoning Technical University, Fuxin Liaoning 123000, China;
2. Department of Architectural Economics, Liaoning Jianzhu Architecture Vocational University, Liaoyang Liaoning 111000, China |
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Abstract To study the change law of the dynamic characteristics of soft soil, particularly the inadequate bearing capacity of highway and railway roadbeds induced by traffic loads, the soft soil in Yingkou area was taken as the research object. A series of dynamic strength and dynamic modulus tests were performed under different dynamic stress amplitude amplitudes, consolidation ratios, confining pressures, dynamic stress amplitudes, consolidation confining pressures, consolidation ratios, vibration frequencies, soft soil dynamic strains, dynamic strengths, dynamic backbone curves, dynamic moduli, and dynamic damping ratios. The results show that (1) Yingkou soft soil has a significant structural property. A strain turning point was found in the εd-N and dynamic curves. The deformation of soil increases rapidly when the strain is larger than this turning point. (2) Dynamic strength increases as consolidation confining pressures increase, but the influence of consolidation ratio and vibration frequencies on soft soil dynamic strength is not limited to an increase or decrease. (3) The dynamic modulus increases as consolidation confining pressure, consolidation ratio, and vibration frequencies increase, whereas dynamic damping ratio decreases with increasing pressure and ratio but increases with increasing vibrational frequency. The above results provide a theoretical basis for studying the insufficient bearing capacity of highway and rail roadbeds caused by long-term cyclic loads.
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Received: 27 June 2014
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| Fund:Supported by the National Natural Science Foundation of China (No.50978131);the Specialized Research Fund for Doctoral Program of Higher Education (No.20112121110004);and Liaoning Province High School Talent Support Program (No.2008RC23) |
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Corresponding Authors:
LIU Jia-shun, liujiashun000@163.com
E-mail: liujiashun000@163.com
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[1] ZHANG Yong. Deformation Characteristics of Wuhan Soft Clay and Its Dynamic Responses Subjected to Cyclic Loading[D]. Wuhan:Graduate School of Chinese Academy of Science, 2008. (in Chinese)
[2] WANG Jun, CHEN Chun-lei, DING Guang-ya. Analysis of Dynamic Strength and Deformation of Wenzhou over Consolidated Soft Clay under Cyclic Loading[J]. Journal of Natural Disasters, 2009, 18(4):125-131. (in Chinese)
[3] HARDIN B O, DRNEVICH V P. Shear Modulus and Damping in Soils Design Equation Curves[J]. Journal of the Soil Mechanics and Foundation Engineering Division, ASCE, 1972, 98(7):279-287.
[4] HARDIN B O, BLACK W L. Closure to Vibration Modulus of Normally Consolidated Clay:Design Equations and Curves[J]. Journal of the Soil Mechanics and Foundation Engineering Division, ASCE, 1969, 95(6):1531-1537.
[5] HARDIN B O, DRNEVICH V P. Shear Modulus and Damping in Soil:Measurement and Parameter Effects[J]. Journal of the Soil Mechanics and Foundation Engineering Division, ASCE, 1972, 98(6):603-624.
[6] YASHUARA K, YAMANOUCHI T, HIRAO K. Cyclic Strength and Deformation of Normally Consolidated Clay[J]. Soils and Foundations, 1982, 22(3):77-91.
[7] YASUHARA K, MURAKAMI S, SONG B W. Post Cyclic Degradation of Strength and Stiffness for Low Plasticity Silt[J]. Journal of Geotechnical and Geo environmental Engineering, 2003, 129(8):756-769.
[8] FUJIKAWA K. On Optimistic Design of Low Embankment Road on Soft Subsoil by Considering the Traffic-load-induced Settlement[D]. Saga:Saga University, 1996.
[9] CHAI J C, MIURA N. Traffic-load-induced Permanent Deformation of Road on Soft Subsoil[J]. Journal of Geotechnical and Geo Environmental Engineering, 2002, 128(11):907-916.
[10] ZHANG Yong, KONG Ling-wei,GUO Ai-guo, et al. Cumulative Plastic Strain of Saturated Soft Clay under Cyclic Loading[J]. Rock and Soil Mechanics, 2009, 30(6):1542-1549. (in Chinese)
[11] WEI Xing,HUANG Mao-song. A Simple Method to Predict Traffic-load-induced permanent Settlement of Road on Soft Subsoil[J]. Rock and Soil Mechanics, 2009, 30(11):3342-3347. (in Chinese)
[12] LIU Yan-hua, HUANG Mao-song, LI Shuai. An Anisotropic Bounding Surface Model for Structured Soft Clay under Cyclic Loading[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(7):1065-1072. (in Chinese)
[13] DING Bo-yang, ZHANG Yong. Discussion on Dynamic Test and Characteristics of Structural Properties of Quaternary Soft Clay in Hangzhou Region[J]. Rock and Soil Mechanics, 2012, 33(2):336-342. (in Chinese)
[14] LEI Hua-yang, JIANG Yan, LU Pei-yi, et al. Experimental Study of Dynamic Stress-Strain Relation of Structural Soft Soil under Traffic Load[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(S1):3052-3056. (in Chinese)
[15] LIU Sheng-chuan, CAO Yuan, YANG Zhi-wen. Study on the Deformation Behavior of Soft Soil Subgrade under Dynamic Load[J]. Journal of Railway Engineering Society, 2011(5):22-26. (in Chinese)
[16] LIU Sheng-chuan, CAO Yuan. Research on Settlement Law of Soft Soil Subgrade of New Railway[J]. Journal of Railway Engineering Society, 2010(5):1-3, 8. (in Chinese)
[17] ZHAO Jun-ming, LIU Song-yu, SHI Ming-lei, et al. Experimental Study on Dynamic Response of Low Embankment under Traffic Load[J]. Journal of Southeast University:Natural Science Edition, 2007, 37(5):921-925. (in Chinese)
[18] CHAI Jin-chun, MIURA N. Traffic Load Induced Permanent Deformation of Road on Soft Subsoil[J]. Journal of Geotechnical and Geo Environmental Engineering, 2002, 128(11):907-916.
[19] LIANG Bo, LUO Hong, SUN Chang-xin. Simulated Study on Vibration Load of High Speed Railway[J]. Journal of the China Railway Society, 2006, 28(4):89-94. (in Chinese)
[20] CHEN Ying-ping, HUANG Bo, CHEN Yun-min. Reliability Analysis of High Level Backfill Based on Chaotic Optimization[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(5):764-770. (in Chinese)
[21] CHEN Ying-ping, HUANG Bo, CHEN Yun-min. Deformation and Strength of Structural Soft clay under Cyclic Loading[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(9):1065-1072. (in Chinese)
[22] ZHANG Xiang-dong, LI Xu, LIU Jia-shun, et al. Vibration Excited Subsidence of Aeolian Subsoil under Dynamic Load[J]. Journal of Highway and Transportation Research and Development, 2011, 28(12):39-43. (in Chinese)
[23] ZHANG Hong-bo, HUANG Mao-song, SONG Xiu-guang. Experimental Study on Cumulative Deformation of Silty Sand Roadbed under Repeated Loading[J]. Journal of Highway and Transportation Research and Development, 2009, 26(9):6-12. (in Chinese) |
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2014, Vol. 8 
