岩土力学2025，Vol.46Issue(9)：2763-2772,10.DOI:10.16285/j.rsm.2024.0913
浮泥-流泥静态间歇沉降与低压固结沉降计算方法
Calculation of static batch settlement and low-pressure consolidation settlement of suspended and fluid mud
摘要
Abstract
The physico-mechanical properties of suspended and fluid mud differ significantly from those of conventional soft soils.Therefore,using only the method of"correction by empirical coefficients of settlement calculation based on classical formulae"for calculating settlement in large areas of suspended and fluid mud foundations is unscientific.In response,this study established a total settlement calculation method for the intermittent settlement stage and the subsequent low-pressure(0-100 kPa)consolidation stage through theoretical derivation.Static intermittent settlement modeling tests were conducted to evaluate the validity of the batch settlement calculation method,and low-pressure consolidation tests were performed to assess the validity of the low-pressure consolidation settlement calculation method.The study results indicate that,1)The cumulative change rate of average void ratio(re)and the low-pressure consolidation compression index(CC-low)are two key technical parameters.The former can be determined by combining theoretical formulae with long-term static intermittent settlement modeling tests,while the latter can be determined through indoor low-pressure consolidation tests.2)For suspended and fluid mud with a clay content of 40%to 60%,if static intermittent settlement modeling tests cannot be conducted,a"cumulative change in the average void ratio of 60%to 75%"can serve as a criterion for determining the stable state of static intermittent settlement.Specifically,when the clay content is 40%,re is 75%,and when the viscous grain content is 60%,re is 60%.This criterion also applies to Bingham bodies with no initial structure.3)Determining the value of the low-pressure consolidation compression index based on the e-lgP(e is the pore ratio,P is the vertical compressive stress)using the slope averaging method is more reasonable.4)The total settlement formula integrates the static intermittent settlement behaviors and low-pressure(0-100 kPa)consolidation behaviors,meeting the requirements for engineering accuracy.This study addresses the shortcomings of current research and provides scientific support for the design and construction of suspended and fluid mud foundation treatments.关键词
地基处理/浮泥-流泥/静态间歇沉降/低压固结沉降/总沉降计算Key words
foundation treatment/suspended and fluid/static intermittent settlement/low-pressure consolidation settlement/total settlement calculation分类
建筑与水利引用本文复制引用
鲍树峰,董志良,莫海鸿,张劲文,于立婷,刘攀,刘晓强,侯明勋..浮泥-流泥静态间歇沉降与低压固结沉降计算方法[J].岩土力学,2025,46(9):2763-2772,10.基金项目
广州交通大学引进人才科研启动项目(No.K42022007) （No.K42022007）
广东省普通高校创新团队项目(No.2022KCXTD024) （No.2022KCXTD024）
广东省重点建设学科科研能力提升项目(No.2022ZDJS091) （No.2022ZDJS091）
广东省普通高校重点领域专项(No.2024ZDZX4039).This work was supported by the Research Initiation Program for Talents Introduced by Guangzhou Jiaotong University(K42022007),Guangdong University Innovation Team Project(2022KCXTD024),Guangdong Province Key Construction Discipline Rresearch Ability Enhancement Project(2022ZDJS091)and Guangdong University Special Focus Areas Project(2024ZDZX4039). （No.2024ZDZX4039）
