RELATIONSHIP BETWEEN CONSOLIDATION COEFFICIENT AND EFFECTIVE CONSOLIDATION STRESS OF SOFT CLAY UNDER COMPRESSION
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摘要: 采用双曲线函数对固结试验中e-p数据进行拟合,得到关于孔隙比与有效固结应力的双曲线模型。在渗透系数与孔隙比关系的基础上,利用e-p双曲线模型推导出软土在压缩过程中固结系数与有效固结应力的关系式,并通过室内渗压试验的数据对该计算模型进行验证。结果表明,该模型较好地反映了固结系数与有效固结应力之间的关系,可以为工程设计提供有益的参考。Abstract: The hyperbolic function is used to fit the e-p data of consolidation tests,with which,the hyperbolic model of the void ratio and effective consolidation stress is presented. On the basis of the permeability coefficient and the void ratio,the relationship between consolidation coefficient and effective consolidation stress of soft clay under compression is derived through the e-p hyperbolic model. The results of the indoor experimental of seepage pressure show that the calculation model is reasonable. In this paper,the calculation model reflects well the relationship between consolidation coefficient and effective consolidation stress, which provides a useful reference for the engineering design.
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[2] 马驯. 固结系数与压缩应力关系的统计分析及研究[J]. 港口工程,1993(1) :46-53. Lowe John, Jonas E, Obrician V. Controlled Gradient Consolidation Test [J]. Journal of the Soil Mechanics and Foundation Engineering Division ,ASCE,1969,95 (SMI) :77-97. [3] Duncan J M. Limitations of Conventional Analysis of Consolidation Settlement [J]. Journal of Geotechnical Engineering ,ASCE,1993,119(9) : 1333-1359. [4] Olson R E. Settlement of Embankment on Soft Clays [J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE,1998,124(4) : 178-288. [5] Kondner R L. Hyperbolic Stress-Strain Response:Cohesive Soils [J]. Journal of the Soil Mechanics and Foundation ASCE,1963.89(SMI) :115-143. [6] 彭长学,杨光华. 软土e-p 曲线确定的简化方法及在非线性沉降计算中的应用[J]. 岩土力学,2008,29(6) : 1-3. [7] 余闯,刘松玉. 考虑应力水平的软土固结系数计算与试验研究[J]. 岩土力学,2004,25( S2) :103-107. [8] Kudo K. Practical Estimates of Site Response: State of the Art Report[C]∥Proceeding of the Fifth International Conf. Seismic Zonation. 1995:1878-1906. [9] 林鹏,许镇鸿,徐鹏,等. 软土压缩过程中固结系数的研究[J]. 岩土力学,2003,24(1) : 2-3.
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