K0固结软黄土的不排水抗剪强度模型
Model of undrained shear strength of K0 consolidated soft loess
翁效林 1侯乐乐 2成志杰 2周容名 2胡继波2
作者信息
- 1. 喀什大学 土木工程学院,新疆 喀什 844008;长安大学 公路学院,陕西 西安 710064
- 2. 长安大学 公路学院,陕西 西安 710064
- 折叠
摘要
为准确预测工程建设场地中饱和软黄土的不排水抗剪强度,采用考虑结构特性及各向异性特征的K0固结软黄土模型,在e-lnp'空间下推导得出考虑结构性影响的体应变通式.引入结构应力比来反映土体固结历史对不排水强度的影响,遵从不排水条件下的体应变规律,推导得出K0固结软黄土的不排水抗剪强度理论计算模型.研究结果表明:本文所提出的计算模型能较准确预测饱和软黄土的不排水抗剪强度.通过参数分析探讨模型主要参数与软黄土不排水抗剪强度的关系,发现软黄土的不排水抗剪强度比与塑性参数负相关,与结构性参数和结构应力比正相关.
Abstract
In order to accurately predict the undrained shear strength of saturated soft loess in engineering construction site,this paper derives a generalized body-strain equation ine-lnp'space,based on the K0 consolidated soft loess model that takes into account structural properties and anisotropic characteristics.The structural stress ratio is also introduced to reflect the influence of soil consolidation history on the undrained strength of the soil,and on this basis the theoretical model for calculating the undrained shear strength of K0 consolidated soft loess is derived in compliance with the body strain law under undrained conditions.The result shows the calculation model proposed in this paper can predict the undrained strength of saturated soft loess more accurately.The relationship between the main parameters of the model and the undrained strength of the soft loess is further explored by parametric analysis,which shows that the undrained shear strength ratio of the soft loess is negatively correlated with the plasticity parameter and positively correlated with the structural parameter and structural stress ratio.
关键词
不排水抗剪强度/软黄土/结构特性/各向异性/结构应力比Key words
undrained shear strength/soft loess/structural characteristic/anisotropy/structural stress ratio引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据