首页|珠海洪湾地区淤泥物理与宏观力学特性研究

珠海洪湾地区淤泥物理与宏观力学特性研究

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
珠海洪湾地区淤泥分布广泛，且具有强度低、变形大、透水性差等特点，其物理力学性质对于工程的安全性至关重要。为探明其工程特性，本研究以现场所取原状淤泥试样为研究对象，通过开展室内基本物性试验、一维固结试验和固结不排水三轴试验，得到了原状试样的工程特性。试验结果表明:现场原状土样天然含水量高，塑性指数较大，渗透系数k为3。68×10-7～5。86×10-7cm/s;压缩系数av=1。269～1。618 MPa-1、压缩模量Es=1。449～1。919 MPa，判定其为高压缩性土;随着土样深度的增加，其压缩系数逐渐减小，压缩模量逐渐增大;该原状土样的抗剪强度较小，黏聚力c=10。10～20。84 kPa，内摩擦角φ=7。28°～12。09°;随着土样深度的增加，其内摩擦角有较小的增长趋势，而黏聚力整体表现为逐渐降低的趋势。
The physical and macroscopic mechanical properties of silt in the Hongwan area of Zhuhai
The Hongwan area in Zhuhai has widespread silt distribution,with specific engineering charac-teristics of low strength,significant deformation,and poor permeability.Its physical and mechanical properties are crucial for engineering safety.To explore the engineering characteristics of the silt,this study used undisturbed samples taken from the field to conduct laboratory experiments of basic physical property test,one-dimensional consolidation test,and consolidated undrained triaxial test.The results show that the natural moisture content of the soil samples is high,with a significant plasticity index and a hydraulic conductivity k ranging from 3.68×10-7 to 5.86×10-7 cm/s.It is classified as highly compressible soil based on the determined compression coefficient av ranging from 1.269 to 1.618 MPa-1 and a compression modulus Es ranging from 1.449 to 1.919 MPa.With increasing depth,samples show a gradual decrease in the compression coefficient and an increase in the compression modulus.The shear strength of the undisturbed soil samples is relatively low,with a cohesion c range of 10.10 to 20.84 kPa and an internal friction angle φ ranging from 7.28° to 12.09°.With increasing sample depth,the change in the internal friction angle is relatively small,while the cohesion significantly decreases.

silt in Zhuhaibasic physical propertiesone-dimensional compression characteristicstriaxial mechanical properties

李栋、汪旭、闫一辉、刘建坤、唐昌意、李智文、李智健、常丹

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珠海市规划设计研究院,广东 珠海 519001

中山大学土木工程学院,广东 珠海 519082

珠海淤泥 基本物理特性 一维压缩特性 三轴力学特性

广东省基础与应用基础研究基金广东省基础与应用基础研究基金珠海市产学研合作项目珠海市社会发展领域科技计划

2020B15151200832022A1515010087ZH22017001200149PWCZH22036204200009PWC

2024

10.13471/j.cnki.acta.snus.2023D003

中山大学学报(自然科学版)(中英文)
中山大学

中山大学学报(自然科学版)(中英文)

CSTPCD北大核心
影响因子：0.608
ISSN：0529-6579
年,卷(期)：2024.63(3)
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