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EXPERIMENTAL STUDY ON CREEP BEHAVIOR OF MARINE CLAY IN SHENZHEN
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摘要: 为探求近代海洋沉积相软土的蠕变规律,对深圳海相沉积软土开展一维压缩蠕变试验和不同固结压力作用下的三轴固结不排水蠕变试验。试验表明,近海沉积相软土蠕变的非线性特性显著,非线性特征通过应力水平的增大而逐渐显露;由于一维压缩蠕变试验中环刀的侧限作用,试样没有发生快速蠕变破坏现象;次固结系数随着固结压力的增大会出现峰值,且峰值对应压力为先期固结压力。研究还表明,在工程中加大固结压力,加速土体的固结排水作用,可减小蠕变对建筑物带来的不利影响。Abstract: For the search of modern marine clay's creep rule,it was carried out one-dimensional compression creep test and triaxial undrained consolidation shear creep test on marine soft clay in Shenzhen under different consoildatation pressure.The experiment indicates that the marine clay creep's nonlinear feature is remarkable,which is revealed gradually with increase in stress;because of the confinement in the one-dimensional compression creep test,there is no fast creep damage phenomenon;a peak value occurs in the coefficient of secondary consolidation with the increase in consolidation,and the pressure corresponding to the peak value is a consolidation pressure ahead of time.The research also indicate that the consolidation pressure shall be increased as far as possible in the project,the consolidation and drainage of soil shall be accelerated,which may reduce the harm of creep to a building.
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[2] 张长生,张伯友,江辉煌.深圳湾浅海相淤泥固结变形特性研究[J].水文地质工程地质,2005,32(3);35-37. 张旷成,丘建金.深圳地区岩土工程的理论与实践[M].北京;中国建筑工业出版社,2000. [3] 房后国,刘娉慧,袁志刚.海积软土固结过程中微观结构变化特征分析[J].水文地质工程地质,2007(2);49-56. [4] 朱鸿鹄,陈晓平,程小俊,等.考虑排水条件的软土蠕变特性及模型研究[J].岩土力学,2006,27(5);694-698. [5] Zhu J G, Yin J H.Drained Creep Behavior of Soft Hong Kong Marine Deposits[J]. Geotechnique,2001,51(5);471-474. [6] 高彦斌.饱和软黏土一维非线性流变-固结耦合分析[J].岩土力学,2006,27(8);116-121. [7] 李国维,盛维高,蒋华忠,等.超载卸荷后再压缩软土的次压缩特征及变形计算[J].岩土工程学报,2009,31(1);118-123. [8] 高彦斌,朱合华,叶观宝,等.饱和软黏土一维次压缩系数 C a 值的试验研究[J].岩土工程学报,2004,26(4);456-463. [9] Bjerrum L.Embankments on Soft Ground[C]∥ Proc Special Conference on Performance of Earth and Earth Supported Structures. ASCE,1972;1-54. [10] 张浩.软土蠕变-固结性状及模型研究[D].长春;吉林大学,2007. -
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