| 海相沉积软土动强度与孔压特性试验研究 |
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| 引用本文： | 叶俊能,陈斌.海相沉积软土动强度与孔压特性试验研究[J].岩土力学,2011,32(Z1):55-60. |
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| 作者姓名： | 叶俊能 陈斌 |
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| 作者单位： | 宁波市轨道交通工程建设指挥部，浙江 宁波 315012 |
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| 基金项目： | 宁波市重大科研攻关项目资助(No.2009C50004) |
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| 摘 要： | 以宁波轨道交通1号线②、③和④层海相沉积软土为对象，进行GDS单向振动三轴试验，研究了不同动应力幅值和频率作用下软土的动强度与孔压特性。结果表明：相同动应力状态下，等向固结时的强度要比K0固结时的强度大；在相同动应力幅值条件下，频率越高，强度越高；动应力越大，试样强度越大，发生硬化现象。随着振动次数的增加，孔隙水压力也不断增大，仅③层粉质黏土夹砂层在应力幅值为5 kPa时孔压有稳定趋势。最后，通过对动三轴试验数据进行拟合，得到了模型参数，其结果可以用来预测循环荷载作用下土体的累计孔压。
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| 关 键 词： | 海相沉积软土 动强度 孔压 |
| 收稿时间： | 2010-12-10 |
Dynamic strength and pore pressure property of marine deposit soft clay |
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| YE Jun-neng,CHEN Bin.Dynamic strength and pore pressure property of marine deposit soft clay[J].Rock and Soil Mechanics,2011,32(Z1):55-60. |
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| Authors: | YE Jun-neng CHEN Bin |
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| Institution: | Ningbo Urban Rail Transit Project Construction Headquarters, Ningbo, Zhejiang 315012, China |
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| Abstract: | The GDS single vibration triaxial test is carried out on the marine deposit soft clay in line 1 of Ningbo urban rail transit,and the dynamic strength and pore pressure property of the soft clay in condition of different dynamic stress amplitudes and frequencies are analyzed.It is shown that the shear strength in isotropic consolidation is greater than that of K0 consolidation in case of similar dynamic stress.The shear strength increases with increasing frequency in the same dynamic amplitude.Furthermore,th... |
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| Keywords: | marine deposit soft clay dynamic strength pore pressure |
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