Evaluation of the risk of sudden failure of a cohesive soil subjected to cyclic loading

Martínez, Eliana; Patiño, Hernán; Galindo, Rubén

doi:10.1016/j.soildyn.2016.10.017

Cited by 19 publications

(8 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…e effect of the vibration frequency on the dynamic properties of clay remains controversial. Various published works have indicated that the vibration frequency has little or no influence on cyclic deformation [14,15]. Yasuhara et al showed that a vibration frequency of 1-2 Hz has only a slight effect on the deformation of soft clays for a given stress level [16].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Deformation Characteristics of Tianjin Clays under Coupled Dynamic Stress and Seepage Fields

Lei

Feng

Jia

et al. 2019

Advances in Civil Engineering

View full text Add to dashboard Cite

The causes, prevention, and control of clay disasters are of great concern in practical engineering applications. Recently, due to unprecedented economic development, increasing numbers of tunnels and subgrades of tidal flat areas have been built in Tianjin, China. Soft soil ground not only bears the vibration load during operation and construction but also receives seepage effects caused by the bursting of pipelines and variations in groundwater levels. Under the coupling action of dynamic and seepage loads, large settlement can occur in soft soil since the deformation is related to both cyclic stress and seepage. Therefore, it is significant to understand the dynamic deformation characteristics of soil to ensure the safety of engineering applications. In this study, a series of laboratory cyclic triaxial tests were conducted to study the deformation behaviours of Tianjin clays under coupled cyclic stress and seepage fields. To simulate the seepage field, water pressure is applied at the bottom of the specimen, and the water can be drained from the top of the specimen to form a head difference in the specimen during the tests. The effects of the seepage pressure, cyclic stress ratio (CSR), and a number of cycles (N) on the hydraulic conductivity, axial deformation, hysteresis curve and dynamic modulus of Tianjin clays were systematically investigated. The laboratory results show that the hydraulic conductivity (k) decreases with the increasing seepage pressure, CSR, and N, and its range is from 4.6 × 10−8 cm/s to 7.4 × 10−8 cm/s. The axial deformation of the soil increases with increasing CSR and seepage pressure. With an applied water pressure of 150 kPa at the bottom of the specimen and a CSR of 0.3, the maximum cumulative plastic strain reaches 4.78%, increasing by 53.2% compared with a CSR of 0.1. The hysteresis curve gradually becomes denser or thinner with increasing CSR and N; the hysteretic curve tends to a straight line for N of 5,000. The dynamic modulus increases with increasing N and depends on the CSR and seepage pressure. Empirical equations are suggested for calculating the dynamic modulus with different CSR values and seepage pressures. The results of this study can provide reference parameters for the construction and design of tunnels and subgrades of tidal flat areas in clay strata under the influence of water environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Deformation Characteristics of Tianjin Clays under Coupled Dynamic Stress and Seepage Fields

Lei

Feng

Jia

et al. 2019

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…In the investigation carried out by Patiño [23], a total of 20 monotonic simple shear tests were carried out. It is pointed at the empirical relation τ max ≈ 0.3•σ ov proposed by Martínez et al [2] that relates to the monotonic strength (τ max ) and the effective consolidation stress "in situ" (σ ov ).…”

Section: Monotonic Simple Shearmentioning

confidence: 97%

“…The paper presented here is part of a research program related to the behavior of soft cohesive soils [1,2]. The scope of the present study is the influence of the combination of monotonic and dynamic shear stresses in the deformations that develop a soft cohesive soil when dynamically required under a structure with complex stress distribution.…”

Section: Introductionmentioning

confidence: 99%

“…If the combination (((τ o /σ ov = 5%) + τ c /σ ov = 25%) = 30%) is compared with the combination ((τ o /σ ov = 25%) + (τ c /σ ov = 5%) = 30%). In the first case, 15 cycles are required for the soil to develop large cyclic strains γ c = 13% and permanent strains γ p = 7% and therefore "sudden failure" occurs, Martínez et al [2]. In the second case, after 1300 cycles, the cyclic strains γ c were barely equal to 0.15% and the permanent strains γ p = 9.6%.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Cyclic and Permanent Shear Strains of a Soft Cohesive Soil Subjected to Combined Static and Cyclic Loading

Patiño¹,

Galindo

Marañón

2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

This paper refers to cyclic shear strains (γc) and permanent shear strains (γp) of a soft cohesive soil, when both monotonic shear stresses (τo) and cyclic shear stresses (τc) are applied. The research is backed by an extensive experimental program with 139 cyclic simple shear tests that included identification and classification tests. These cyclic simple shear tests were conducted under different levels of stresses, τo, before the cyclic phase. Laboratory tests were carried out on undisturbed samples from the Port of Barcelona, located in Spain on the Mediterranean coast, and characterized by a monotonic strength (τmax) approximately equal to 30% of the initial effective vertical stress (σ′ov). The samples were taken at depths between 29 and 52 m and correspond to an initial effective vertical stress between 277 and 413 kPa, respectively. In general, the results indicate that: (a) the combination of τo and τc controls the generation of γc and γp, (b) it is not always true that when τo/σ′ov + τc/σ′ov ≈ τmax/σ′ov, the soil reaches failure cyclically, and (c) empirical relations useful for design can be established between γc, γp, and the number of cycles (N), for different relationships varying (τo/σ′ov) between 0% and 25%.

show abstract

“…La expresión formulada por Hardin en su forma adimensional, está dada por: Los autores aclaran que las correlaciones propuestas son válidas únicamente para curvas de distribución granulométrica con una forma lineal en la escala semilogarítmica. Martínez et al (2017), como parte integral de esta tesis y a partir de los resultados obtenidos de pruebas de corte simple cíclico, realizadas con suelos finos del puerto Barcelona -España, proponen las funciones empíricas [4.67] y [4.68] para evaluar el módulo de rigidez en función del número de ciclo (N), de la deformación cíclica (γ c ), de la presión efectiva de consolidadción (σ' ov ) y de la presión efectiva en cualquier momento de la prueba (σ' v ); C 3 , C 4 , C 5 , C 6 , E 3 , E 4 , E 5 y E 6 son constantes empíricas que dependen del tipo de material. Las dos funciones empíricas son las indicadas a continuación.…”

Section: Modulo De Corte En Arenasunclassified

Propiedades geotécnicas de los estériles mineros de la mina de Riotinto, Huelva-España

Rojas¹

View full text Add to dashboard Cite

Evaluation of the risk of sudden failure of a cohesive soil subjected to cyclic loading

Cited by 19 publications

References 28 publications

Experimental Investigation of the Deformation Characteristics of Tianjin Clays under Coupled Dynamic Stress and Seepage Fields

Experimental Investigation of the Deformation Characteristics of Tianjin Clays under Coupled Dynamic Stress and Seepage Fields

Cyclic and Permanent Shear Strains of a Soft Cohesive Soil Subjected to Combined Static and Cyclic Loading

Propiedades geotécnicas de los estériles mineros de la mina de Riotinto, Huelva-España

Contact Info

Product

Resources

About