Rheological Behaviors of Structural Soft Soil in Dongting Lake Area

Hu, Hui; Zhang, Bowen; Yu, Wen Ming; Lu, Lifang; Zhang, Chunmei; Niu, Tianxin

doi:10.1007/s10706-020-01344-z

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…The rheological constitutive relation of soil is the key to studying its rheological property [18,19]. The rheological model is a description of the stress-strain-time relationship of soil during loading, which can effectively and intuitively explain the rheological characteristics of the stress-strain-time of soil [20][21][22]. Zhu et al proposed an improved Mesri creep model using triaxial tests [23].…”

Section: Introductionmentioning

confidence: 99%

Creep Characteristics of Soil in the Sliding Zone of Huangtupo Landslide

et al. 2022

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The reservoir water level in the Three Gorges Reservoir (TGR) of the Yangtze River is adjusted between 145 m and 175 m throughout the year. The landslide below the reservoir water level bears periodic dynamic seepage pressure on the basis of the original steady-state water pressure. In the process of rising reservoir water levels in particular, the effective stress on the sliding zone soil below the reservoir water level line is reduced, and the sliding zone soil shows an unloading state. In order to study the creep characteristics of landslides in a reservoir area, direct shear creep tests of the sliding zone soil in the Huangtupo landslide in an unloading state were carried out in this study. The test results show that the creep characteristics of the sliding zone soil are obvious. The creep curve of the sliding zone soil presents an attenuation creep stage with low shear stress, which is mainly manifested as an elastic creep. However, with the increase in the shear stress, the creep curve of the sliding zone soil presents a steady creep stage, which is mainly manifested as viscoelastic creep. The nonlinear creep characteristics of the sliding zone soil are related to the creep time, stress level, and soil porosity. The longer the creep time, the greater the stress level and the denser the soil, the more obvious the nonlinear creep characteristics of the sliding zone soil. In this study, the Burgers model was used to fit the creep curve of the sliding zone soil, and the fitting effect was good, which indicates that the Burgers model can sufficiently describe the unloading state creep characteristics of the sliding zone soil in the Huangtupo landslide.

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Section: Introductionmentioning

confidence: 99%

Creep Characteristics of Soil in the Sliding Zone of Huangtupo Landslide

et al. 2022

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“…China has a vast territory with complex and diverse geological and geomorphic conditions [1,2], where soft soil layers are widely distributed, such as in the areas of Shanghai, Wuhan, and Nanjing in the Yangtze River basin and Guangzhou in the Pearl River Delta [3][4][5]. Geologically, soft soil layer is characterized by high natural water content, large pore ratio, high compressibility, low shear strength, and high sensitivity, which makes it an undesirable geological body in constructional engineering [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Field Experiment Research of the Polycystic Aeration Bolt: Model Design and Anchorage Mechanism

Peng

Chen

et al. 2021

Advances in Civil Engineering

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As a new type of bolt, the polycystic aeration bolt has a broad application prospect in soft soil area; however, its design and production are still in the stage of constant exploration and improvement. From the perspective of bolt material and engineering cost, the important components of the polycystic aeration bolt were analyzed by combination with the existing bolt models, and a new structural design scheme of a kind of polycystic aeration bolt which can be used in practical engineering was presented in this paper. Then, the stress and failure mode of this bolt were discussed, and the theoretical equation of the bearing capacity was derived by using the elastic-plastic theory. In addition, the assembly and fabrication technology of this bolt in practical foundation pit engineering was described in detail. Finally, the field pull-out test of the polycystic aeration bolt was carried out, and the test results were compared with those of the conventional grouting bolt, which indicated that this new bolt has a greater advantage in bearing capacity than the conventional grouting bolt, verifying the feasibility of the structural design scheme of the polycystic aeration bolt proposed in this paper.

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Viscoelastic‐Elastoplastic Analysis of Overconsolidated Structural Soft Soils

Ai,

Gu,

Jiang

2024

Num Anal Meth Geomechanics

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Soft soils exhibit significant time‐dependent effects during long‐term deformation. To precisely describe the long‐term behavior of soft soils, it is necessary to employ elastoplastic theory and rheology principles for investigating the stress–strain relationship of the soils. In this paper, a super‐subloading modified Cam‐clay model is initially derived. Subsequently, by introducing the Kelvin model to describe the creep behavior of soils, and combining it with the modified Cam‐clay model, an overconsolidated structural viscoelastic‐elastoplastic model is further presented. After converting the equation into matrix form and programming it in Fortran, the proposed model is implemented by ABAQUS. Then, the accuracy of the developed model and program is verified through comparison with existing literature and experimental results. Finally, parametric analysis is conducted to explore the impact of viscoelasticity, structure, and overconsolidation on the responses of soft soils.

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Rheological Behaviors of Structural Soft Soil in Dongting Lake Area

Cited by 5 publications

References 8 publications

Creep Characteristics of Soil in the Sliding Zone of Huangtupo Landslide

Creep Characteristics of Soil in the Sliding Zone of Huangtupo Landslide

Field Experiment Research of the Polycystic Aeration Bolt: Model Design and Anchorage Mechanism

Viscoelastic‐Elastoplastic Analysis of Overconsolidated Structural Soft Soils

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