Suction Stress Characteristic Curves of Cohesive-Frictional Soils from Multiple Suction-Controlled Testing Methods

Patil, Ujwalkumar D.; Hoyos, Laureano R.; Puppala, Anand J.; Congress, Surya Sarat Chandra

doi:10.1061/(asce)gm.1943-5622.0001698

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…The shear testing equipment is capable of subjecting the soil specimen to rather large strains. The residual shear stress state in the field can be accurately simulated in the laboratory (Patil et al, 2020). However, a lack of data exists on the silt-structure interface characteristics in suction-controlled shear tests.…”

Section: Introductionmentioning

confidence: 99%

Suction-Controlled Ring Shear Test of the Silt and Concrete Interface

Li,

Yang,

et al. 2024

Preprint

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The interface of a structural system in the soil is usually unsaturated. A decrease in the shear strength of the soil-structure interface can degrade the structure, especially under humid conditions. Studying the shear characteristics of the silt-concrete interface using a shear apparatus. Suction-controlled ring shear tests were carried out on the silt-concrete interface for three interface roughness values. The influence of the matric suction (s) and interface roughness (R) on the shear strength index of the silt-concrete interface was analyzed. The test results showed that high values of s and R improved the shear strength of the interface, but the result was affected by the net normal stress (NNS). High values of NNS and R improved the strain-hardening characteristics. NNS, s, and R significantly affected the interface shear shrinkage. The internal friction angle of the saturated interface was smaller than that of saturated silt, whereas the opposite occurred in the unsaturated state. The cohesion and internal friction angle of the interface rose with an increase in R, and they were larger than that of silt. A shear strength model of the silt and interface was established.

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Section: Introductionmentioning

confidence: 99%

Suction-Controlled Ring Shear Test of the Silt and Concrete Interface

Li,

Yang,

et al. 2024

Preprint

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“…The relationship between shear rate, confining pressure, dry density, and the shear strength index of soil has a strong regularity when the stress-strain characteristics of the soil are obtained through testing [14][15][16][17], and the equation with the good fitting relationship can be established to calculate the strength of multi-dimensional loess. Additionally, as suction increases, the internal friction angle lowers and the shear strength rises, both of which are non-linear changes [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Study on Filling Material Strength and Dam Failure Characteristics of Loess Dam

Chen

Wei

et al. 2023

Applied Sciences

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In the Loess Plateau region, loess, as a widely distributed building material, is often used as a filling material for dams. When the water level reaches a certain height, the body of a dam is prone to shear failure due to the penetration of water. The change in the shear performance of local loess filler can affect the overall strength of loess dams. Therefore, the filler of a loess dam is selected to study the shear performance. The progressive failure process of a loess dam is simulated. The shear failure characteristics of loess filler under the influence of water content, confining pressure, and dry density were explored. The characteristics of the shear failure of a loess dam were analyzed. The remolded loess is prone to shear expansion failure under low confining pressure, low water content, and high dry density, and is prone to shear shrinkage failure under high confining pressure, high water content, and low dry density. When the water content is constant, the cohesion increases with the increase in dry density. When the dry density is constant, the internal friction angle generally increases with the increase in water content. However, when the dry density is high, the permeability of the remolded loess is weakened, resulting in uneven water distribution under a low water content, which affects the test results. The failure process of the loess dam is a progressive shear failure, which is affected by the water level and water pressure, and is destroyed under the action of pore water pressure and water body lateral pressure.

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Influence of Unsaturated Hydraulic Properties on Transient Seepage and Stability Analysis of an Earthen Dam

Puppala

2022

Int. J. Geomech.

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Suction Stress Characteristic Curves of Cohesive-Frictional Soils from Multiple Suction-Controlled Testing Methods

Cited by 7 publications

References 25 publications

Suction-Controlled Ring Shear Test of the Silt and Concrete Interface

Suction-Controlled Ring Shear Test of the Silt and Concrete Interface

Study on Filling Material Strength and Dam Failure Characteristics of Loess Dam

Influence of Unsaturated Hydraulic Properties on Transient Seepage and Stability Analysis of an Earthen Dam

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