Rheological test and strength model of submarine mud flow

FAN Ning; NIAN Ting-kai; ZHAO Wei; LU Shuang; SONG Lei; YIN Ping

doi:10.16285/j.rsm.2016.1227

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Rheological test and strength model of submarine mud flow

更新时间：2026-06-25

- Rheological test and strength model of submarine mud flow
- Vol. 39, Issue 9, Pages: 3195-3202(2018)
- 作者机构：
  
  1. 大连理工大学海岸和近海工程国家重点实验室,辽宁,大连,116024
  2. 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏,徐州,221008
  3. 国土资源部海洋油气资源与环境地质重点实验室,山东,青岛,266071
  4. 沈阳工学院能源与水利学院,辽宁,抚顺,113122
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.1227
  CLC： TU411
- Online First：08 October 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
FAN Ning, NIAN Ting-kai, ZHAO Wei, et al. Rheological test and strength model of submarine mud flow[J]. 2018, 39(9): 3195-3202.
DOI：

FAN Ning, NIAN Ting-kai, ZHAO Wei, et al. Rheological test and strength model of submarine mud flow[J]. 2018, 39(9): 3195-3202. DOI： 10.16285/j.rsm.2016.1227.

摘要

海底泥流是海底斜坡发生失稳滑动后，经复杂的水土交换作用演变成的稀式海底滑坡体，表现出土体和流体的双重特征，而现有的测试方法难以获得低剪切应变率下连续变化的强度值，不能很好地揭示其综合强度特性。利用新型全流动贯入仪和RST流变仪，对模拟海底泥流在不同剪切应变率下的流变和强度特性进行了多组试验研究，并基于试验结果分析了不排水剪切强度、屈服应力和表观黏度与含水率的相关性。基于剪切稀化理论，提出分阶段拟合模式来描述海底泥流从低剪切应变率到中高剪切应变率的流变关系；通过多种常规流变模式拟合结果的对比分析，显示出新流变模式的适用性和优势。考虑强度软化的影响，建立了全剪切应变率范围内海底泥流的不排水剪切强度模型，为海底泥流运动过程的数值模拟和灾害评价提供科学依据。

Abstract

Submarine mud flow is a kind of dilute submarine landslide body which is evolved by complex soil and water exchange after the unstable sliding of submarine slope. It shows the dual characteristics of soil and fluid. However

it is difficult to obtain the continuous changing strength under low shear strain rate by the existing testing methods

and the comprehensive strength characteristics can not be well revealed. The rheological and strength properties of the simulated submarine mud flow at different shear strain rates are investigated by using new full-flow penetrometer and RST rheometer

and the relevance of the undrained shear strength

yield stress and apparent viscosity with moisture content are analyzed according to the experimental results. Based on the shear thinning theory

a piecewise fitting model is developed to describe the rheological relation of submarine mud flow from low to high shear strain rate. Then

the new rheological model shows a good applicability and advantages through the comparison with other conventional models. In addition

an undrained shear strength model of submarine mud flow is established by considering the effect of strength softening

which provides a scientific basis for the numerical simulation and disaster assessment of submarine mud flow movement.

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