Dynamic strength and pore pressure property of marine deposit soft clay

YE Jun-neng; CHEN Bin

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Dynamic strength and pore pressure property of marine deposit soft clay

更新时间：2026-06-25

- Dynamic strength and pore pressure property of marine deposit soft clay
- Vol. 32, Issue S1, (2011)
- 作者机构：
  
  宁波市轨道交通工程建设指挥部,浙江,宁波,315012
- 作者简介：
- 基金信息：
- DOI：
  CLC： O347.2
- Online First：16 May 2011，
  
  Published：2011
- 稿件说明：
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YE Jun-neng, CHEN Bin. Dynamic strength and pore pressure property of marine deposit soft clay[J]. 2011, 32(S1).
DOI：

YE Jun-neng, CHEN Bin. Dynamic strength and pore pressure property of marine deposit soft clay[J]. 2011, 32(S1). DOI：

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。

Abstract

he 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

the greater dynamic stress is used in the test

the higher shear strength of samples is obtained; and a hardening phenomenon occurs. With increasing of vibration times

pore pressure increases

except that there occurs a stable tendency in layer ③ when the stress amplitude is 5kPa. At last

the data of the dynamic triaxial test is fitted; and the parameters are used to model the accumulative pore pressure.

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