岩土力学 ›› 2025, Vol. 46 ›› Issue (9): 2763-2772.doi: 10.16285/j.rsm.2024.0913CSTR: 32223.14.j.rsm.2024.0913

• 基础理论与实验研究 • 上一篇    下一篇

浮泥−流泥静态间歇沉降与低压固结沉降计算方法

鲍树峰1，董志良2, 3，莫海鸿4，张劲文1，于立婷1， 刘攀1，刘晓强1，侯明勋5   

  1. 1. 广州航海学院 广东省近海基础设施绿色建造与智能运维重点实验室，广东 广州 510725；2. 中交四航工程研究院有限公司，广东 广州 510230； 3. 中交集团交通基础工程环保与安全重点实验室，广东 广州 510230；4. 华南理工大学 土木与交通学院，广东 广州 510641； 5. 广州科技职业技术大学 智慧城市工程学院，广东 广州 510440
  • 收稿日期:2024-07-23 接受日期:2024-10-12 出版日期:2025-09-10 发布日期:2025-09-04
  • 通讯作者: 于立婷，女，1990年生，博士，讲师，主要从事波浪与结构物的相互作用方面的研究工作。E-mail: ltyu26gzhh@163.com
  • 作者简介:鲍树峰，男，1982年生，博士，教授，主要从事海洋岩土方面的研究工作。E-mail: baoshufeng@gzmtu.edu.cn
  • 基金资助:
    广州交通大学引进人才科研启动项目（No.K42022007）；广东省普通高校创新团队项目（No.2022KCXTD024）；广东省重点建设学科科研能力提升项目（No.2022ZDJS091）；广东省普通高校重点领域专项（No.2024ZDZX4039）。

Calculation of static batch settlement and low-pressure consolidation settlement of suspended and fluid mud

BAO Shu-feng1, DONG Zhi-liang2, 3, MO Hai-hong4, ZHANG Jin-wen1, YU Li-ting1, LIU Pan1, LIU Xiao-qiang1, HOU Ming-xun5   

  1. 1. Guangdong Provincial Key Laboratory of Green Construction and Intelligent Operation & Maintenance for Offshore Infrastructure, Guangzhou Maritime University, Guangzhou, Guangdong 510725, China; 2. CCCC Fourth Harbor Engineering Institute Co., Ltd., Guangzhou, Guangdong 510230, China; 3. CCCC Key Laboratory of Environmental Protection & Safety in Foundation Engineering of Transportation, Guangzhou, Guangdong 510230, China; 4. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong 510641, China; 5. School of Smart City Engineering, Guangzhou Vocational University of Science and Technology, Guangzhou, Guangdong 510440, China
  • Received:2024-07-23 Accepted:2024-10-12 Online:2025-09-10 Published:2025-09-04
  • Supported by:
    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).

PDF (Chinese)

87

摘要： 浮泥−流泥的物理力学特性与常规软土存在较大差异，以致大面积浮泥−流泥地基的沉降计算仅采用“在经典公式基础上通过沉降计算经验系数进行修正”的方法是欠科学的。鉴于此，通过理论推导建立了间歇沉降阶段及其后续低压（0～100 kPa）排水固结阶段的总沉降计算方法，并通过开展室内静态间歇沉降模型试验和低压固结试验，分别验证了间歇沉降计算方法和低压固结沉降计算方法的科学合理性。研究结果表明：（1）平均孔隙比累计变化率re和低压固结压缩指数CC-low是两个关键技术参数，前者可通过理论公式推导和开展长期静态间歇沉降模型试验综合确定，后者则通过开展低压固结试验确定。（2）对于黏粒含量为40%～60%的浮泥−流泥，在无法开展静态间歇沉降模型试验的情况下，可将“平均孔隙比累计变化率为60%～75%”作为静态间歇沉降稳定状态的判定标准，即当黏粒含量为40%时，re 取为75%；当黏粒含量为60%时，re 取为60%。该标准同样适用于无初始结构的宾汉体。（3）基于e-lgP（e 为孔隙比，P 为竖向压应力）曲线采用斜率平均法确定低压固结压缩指数的取值，更为合理。（4）总沉降计算公式综合考虑了静态间歇沉降行为与低压（0～100 kPa）排水固结行为，能满足工程精度要求，弥补了现行相关研究的不足，可为浮泥−流泥地基处理的设计与施工提供科学支撑。

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

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.

Key words: foundation treatment, suspended and fluid, static intermittent settlement, low-pressure consolidation settlement, total settlement calculation

中图分类号: TU470
[1] 孙锦鑫, 卢萌盟, 刘干斌, . 高置换率散体材料桩-不透水桩组合型复合地基非线性固结解析研究[J]. 岩土力学, 2024, 45(8): 2421-2436.
[2] 睢博栋 . 单根垂直旋喷桩施工引起土体位移的预测方法[J]. 岩土力学, 2022, 43(S1): 513-520.
[3] SUKSAN Aniroot, HORPIBULSUK Suksun, . 水泥稳定再生沥青路面/红土混合物用于软土改良的效果评估[J]. 岩土力学, 2022, 43(12): 3305-3315.
[4] 胡利文, 刘志军, . 真空预压加固土体变形机制分析[J]. 岩土力学, 2021, 42(3): 790-799.
[5] 任连伟, 曹辉, 孔纲强, . 注入位置对化学电渗法加固软黏土 效果影响试验研究[J]. 岩土力学, 2021, 42(10): 2705-2712.
[6] 岳浩淼，黄建明，文 桃，米海珍，. 换填覆重法处理砂类硫酸盐渍土地基的室内模拟试验[J]. , 2017, 38(2): 471-478.
[7] 陈忠清 ，徐 超 ，吕 越,. 冲击碾压加固砂土模型试验研究[J]. , 2015, 36(S2): 525-531.
[8] 姚建平 ，蔡德钩 ，朱 健 ，王立伟,. 后压浆钻孔灌注桩承载特性研究[J]. , 2015, 36(S1): 513-517.
[9] 姜 燕 ，杨光华 ，黄忠铭 ，乔有梁 ，张玉成 , . 复杂岩溶场地下的高层建筑地基处理[J]. , 2015, 36(S1): 430-438.
[10] 刘远锋 ，郑 刚,. 地基排水控制法的沉降和孔压数值分析[J]. , 2015, 36(S1): 592-596.
[11] 陈国兴 ，顾小锋 ，常向东 ，李小军 ，周国良,. 1989～2011期间8次强地震中抗液化地基处理成功案例的回顾与启示[J]. , 2015, 36(4): 1102-1118.
[12] 张 勇 ，赵云云 ，高文龙,. 真空轻型井点地基处理试验研究[J]. , 2014, 35(9): 2667-2672.
[13] 黄雪峰 ，杨校辉，. 湿陷性黄土现场浸水试验研究进展[J]. , 2013, 34(S2): 222-228.
[14] 米海珍，杨 鹏. 挤密桩处理湿陷性黄土地基的现场试验研究[J]. , 2012, 33(7): 1951-1956.
[15] 何开胜 ，过兴发. 吹填粉细砂的无填料振冲密实试验与工程应用[J]. , 2012, 33(4): 1129-1133.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发