摘要
为准确预测和分析某新建机场的工后沉降大小与发展趋势,对该工程填海造地范围内的两组海相淤泥质土进行了一维流变固结试验,试验考虑了分级加载和分别加载两种工况。通过对试验中试样的固结变形随时间变化的规律分析,得到了该场地内软土次固结系数的大小及其影响因素,试验结果表明,该海相淤泥质软土的次固结系数先随着荷载的增大而快速增长,达到一定荷载后呈缓慢增长,并且在一定深度范围内也随深度的增大而增大。此外还分析了试验中软土次固结与主固结变形比例随荷载的变化情况,结果显示主次固结变形比例与该软土先期固结压力存在明显关联性。试验结果与分析结论可为该地区类似工程中软土的后期沉降变形分析与计算提供借鉴与参考。
To accurately predict and analyze the post-construction settlement and development trend of a new airport,onedimensional rheological consolidation tests were carried out on two groups of marine mucky soils.This was done within the reclaimed land area of this project under two conditions of graded loading and separate loading.The secondary consolidation coefficient of soft soil and its influencing factors were obtained by analyzing the development of consolidation deformation with time.The experimental results show that the secondary consolidation coefficient of the marine soft mucky soil increases rapidly with the increase in load first and increases slowly after reaching a certain load,and then it increases with depth within a certain range.In addition,the variation of deformation ratio of secondary consolidation and primary consolidation with load was analyzed.And there is an obvious correlation between the proportion of primary and secondary consolidation deformation and the pre-consolidation pressure of the soft soil.The experimental results and analysis conclusions can provide reference for the analysis and calculation of soft soil deformation of similar projects.
作者
刘光庆
刘海旺
陈缘
李文乾
崔伦凯
LIU Guang-qing;LIU Hai-wang;CHEN Yuan;LI Wen-qian;CUI Lun-kai(Xiamen Iport Group Co.,Ltd.,Xiamen 361001,Fujian,China;Department of Architecture and Civil Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;Urban Rail Traffic Engineering Branch of China Raiway No.10 Engineering Group,Guangzhou 511400,Guangdong,China)
出处
《地基处理》
2021年第6期482-487,共6页
Journal of Ground Improvement
关键词
软土
机场
沉降
流变
次固结
试验
soft soil
airport
settlement
rheology
secondary consolidation
test
