Behavior of compacted clay-concrete interface

Shakir, Ressol R.; Zhu, Jun-Gao

doi:10.1007/s11709-009-0013-6

Cited by 29 publications

(17 citation statements)

References 23 publications

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“…An alternative approach was used for identifying parameters K 0 , U 0 1 , U 0 2 , C c , and C r , which are unavailable from the literature. The value of was estimated based on [45] or can be obtained through a back analysis of direct shear test results [31,[46][47][48][49], ranging from 0.1% to 2% for various soil types. C c and C r were estimated using the empirical formulae reported by Wu et al [50] as follows:…”

Section: Case Studymentioning

confidence: 99%

Simplified analytical solution for stress concentration ratio of piled embankments incorporating pile–soil interaction

Luo

Wei

et al. 2021

Rail. Eng. Science

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Piled embankments have been extensively used for high-speed rail over soft soils because of their effectiveness in minimizing differential settlement and shortening the construction period. Stress concentration ratio, defined as the ratio of vertical stress carried by pile heads (or pile caps if applicable) to that by adjacent soils, is a fundamental parameter in the design of piled embankments. In view of the complicated load transfer mechanism in the framework of embankment system, this paper presents a simplified analytical solution for the stress concentration ratio of rigid pile-supported embankments. In the derivation, the effects of cushion stiffness, pile–soil interaction, and pile penetration behavior are considered and examined. A modified linearly elastic-perfectly plastic model was used to analyze the mechanical response of a rigid pile–soil system. The analytical model was verified against field data and the results of numerical simulations from the literature. According to the proposed method, the skin friction distribution, pile–soil relative displacement, location of neural point, and differential settlement between the pile head (or cap) and adjacent soils can be determined. This work serves as a fast algorithm for initial and reasonable approximation of stress concentration ratio on the design aspects of piled embankments.

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Section: Case Studymentioning

confidence: 99%

Simplified analytical solution for stress concentration ratio of piled embankments incorporating pile–soil interaction

Luo

Wei

et al. 2021

Rail. Eng. Science

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“…Following the work of Potyondy [8], who studied the interface between soil and various construction materials, many scholars have studied the characteristics of the soil-structure interface . These studies included apparatus modifications and new test methods [9][10][11], which were used to investigate the influence of surface properties on the traditional soil-structure interface (including soil-concrete, soil-steel, and soil-cement grout interfaces) [9,[12][13][14][15][16][17][18][19][20][21][22][23][24][25]33,34], the interfaces between new materials (including ice-soil and soil-geogrid interfaces) [26][27][28][29][30][31][32], and the exterior load conditions (stress history, monotonic load, or cyclic load condition) [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…Chen [21] conducted a series of laboratory large-scale direct shear tests using different types of red clay-concrete interfaces and the surface roughness is found to have a remarkable effect on the interfacial shear strength and shear behavior, which is that the shear strength increases with increased surface roughness. Shakir and Zhu [24] carried out direct shear tests to study the effects of water content and surface roughness on the shear stress-shear displacement relationship of a clay-concrete interface, wherein they found that the interfacial shear sliding dominated the interfacial shear displacement behavior for both relatively rough and smooth interfaces.…”

Section: Introductionmentioning

confidence: 99%

“…Following the work of Potyondy [ 8 ], who studied the interface between soil and various construction materials, many scholars have studied the characteristics of the soil–structure interface [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ]. These studies included apparatus modifications and new test methods [ 9 , 10 , 11 ], which were used to investigate the influence of surface properties on the traditional soil–structure interface (including soil–concrete, soil–steel, and soil–cement grout interfaces) [ 9 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 33 , 34 ], the interfaces between new materials (including ice–soil and soil–geogrid interfaces) [ 26 , 27 , 28 ,…”

Section: Introductionmentioning

confidence: 99%

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Study on the Effects of Grouting and Roughness on the Shear Behavior of Cohesive Soil–Concrete Interfaces

Wang

Zhao

2020

Materials

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Grouted soil–concrete interfaces exist in bored piles with post-grouting in pile tip or sides and they have a substantial influence on pile skin friction. To study the effect of grouting volume on the shearing characteristics of the interface between cohesive soil and concrete piles with different roughness, grouting equipment and a direct shear apparatus were combined to carry out a total of 48 groups of direct shear tests on cohesive soil–concrete interfaces incorporating the grouting process. The test results showed that the shear behavior of the grouted cohesive soil–concrete interface was improved mainly because increasing the grouting volume and roughness increased the interfacial apparent cohesion. In contrast, increasing the grouting volume and roughness had no obvious increasing effects on the interfacial friction angle. Interfacial grouting contributed to the transition in the grouted cohesive soil from shrinkage to dilation: as the grouting volume increased, the shrinkage became weaker and the dilation became more obvious. The shear band exhibited a parabolic distribution rather than a uniform distribution along the shearing direction and that the shear band thickness was greater in the shearing direction, and it will become thicker with increasing grouting volume or roughness. The analysis can help to understand the shear characteristics of soil–pile interface in studying the vertical bearing properties of pile with post-grouting in tip or sides.

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“…The test results showed that at a given applied vertical stress level, the major parameters which controlling the interface shear strength behaviour are particles shape and surface roughness. Recently, the influence of surface roughness on the shear strength behaviour of an interface between silty sand and a cement grout surface by means of direct shear apparatus is investigated by Chu and Yin [16]. Their results indicated that the soil-interface shearing resistance depends primarily on the surface roughness, water content of soil, and magnitude of the applied stress.…”

Section: Introductionmentioning

confidence: 99%

Investigation of soil-steel interface behavior of Iraqi soil by direct shear apparatus

Al-Emami

2018

MATEC Web Conf.

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Soilstructure interaction is an important theme observed in many civil engineering structures like fondations. The interface shear strength plays a significant role in the analysis and design of many structures constructed above or under the ground. In this study, a total of 28 specimens were tested at vertical stresses of 100, 200, and 400 kPa using direct shear apparatus under consolidated drained condition. A silty sand soil, as per USCS classification system was prepared in the laboratory at different water contents (4.5%, 8.8%, and 12.5%) and voids ratios (0.4, 0.6, 0.8, and 1). The frictional resistance of this soil was measured. The soil samples were also sheared against three steel surfaces of different textures (smooth, moderate-rough, and rough). The experimental results showed that the steel surface texture is an effective factor in soil-steel interface shear strength. The interface shear strength of the rough steel surface was found higher than smooth and semi-rough steel surfaces. In addition to the surface roughness, the water content and void ratio also play important roles in interface shear strength.

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Behavior of compacted clay-concrete interface

Cited by 29 publications

References 23 publications

Simplified analytical solution for stress concentration ratio of piled embankments incorporating pile–soil interaction

Simplified analytical solution for stress concentration ratio of piled embankments incorporating pile–soil interaction

Study on the Effects of Grouting and Roughness on the Shear Behavior of Cohesive Soil–Concrete Interfaces

Investigation of soil-steel interface behavior of Iraqi soil by direct shear apparatus

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