A study based on the stress-strain behaviour of soils in four areas within Port Harcourt has been carried out. In this study, deformation trends on stress and strain, derivative of stress and strain, and ratio of deviator stress to undrained cohesion to strain were established. Higher stability and lower deformation of soils response to loading were in descending order of Rukpoku, Ada George, Borikiri and Abuloma areas. At low strains, soil modulus E, generally reduced with increase in strain converging towards 3.5% strain and subsequently, exhibited slight increase in value on Rukpoku and Ada George Road soils. Predicted soil moduli for the areas are generally within the range of E, identified as soft to medium clay soils, except for Rukpoku soils that are within the range of hard clay. Predicted values of the ratio of deviator stress to undrained cohesion and strain, at strain level of 1% are generally lower than reported field values frequently used for intact blue London clay, but are within the value used for routine work in London clay. Shallow foundation settlement input parameter of soil modulus can easily be obtained from the predictive models or values, for preliminary analysis and design.
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机译：基于哈科特港内四个地区土壤的应力-应变行为进行了研究。在这项研究中，建立了应力和应变的变形趋势，应力和应变的导数以及偏应力与不排水内聚力与应变之比。在Rukpoku，Ada George，Borikiri和Abuloma地区，土壤对负荷的响应具有较高的稳定性，而其变形较小。在低应变下，土壤模量E通常随着应变的增加而减小，趋于3.5％应变，随后在Rukpoku和Ada George Road土壤上显示出轻微的增加。该地区的预测土壤模量通常在E范围内，确定为软至中粘土，但在硬质粘土范围内的Rukpoku土壤除外。应变水平为1％时，偏应力与不排水内聚力和应变之比的预测值通常低于完整蓝伦敦黏土经常使用的报告现场值，但仍在伦敦黏土的常规工作中使用。可以从预测模型或值中轻松获得土模量的浅层基础沉降输入参数，以进行初步分析和设计。
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