Influence of Soil Suction on Small-Strain Stiffness of Compacted Residual Subgrade Soil

Yang, Shu-Rong; Lin, Huapeng

doi:10.3141/2101-08

Cited by 7 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some of the previous studies also reported a slight The results show a slight increase in the shear wave velocity with an increase in suction at the boundary effect stage (i.e., before air entry value, Figure 3). Similar studies have reported that the shear wave velocity exhibited marginal changes at low suction levels [51][52][53]. At this stage, the pores are mostly filled with water, and the change in soil moisture marginally affects soil rigidity.…”

Section: Shear Wave Velocitysupporting

confidence: 65%

Experimental Investigation for Shear Wave Velocity and Dynamic Characteristics of Unsaturated Sand–Clay Liners

Alnuaim,

Al-Mahbashi

2023

Sustainability

View full text Add to dashboard Cite

This study aims to investigate the shear wave velocity and dynamic characteristics of unsaturated sand–expansive clay liners (SECLs) over a wide range of suctions. Liner layers have gained significant interest as environmentally friendly materials for several geotechnical and geoenvironmental applications. These materials are typically found in an unsaturated state as compacted layers and are exposed to dynamic loads from natural phenomena or manmade activities. In such circumstances, sustainable and stable performance should be ensured during the operation and lifetime of these layers by addressing the dynamic characteristics of these materials and possible degradation. Several specimens belonging to different liners of sand and expansive clay were prepared at different suction levels. The shear wave velocity was determined using the bender element technique (BEls). The specimens were then subjected to extensive cycles of dynamic loads up to 500 cycles in the triaxial dynamic loading system. The shear wave velocity and dynamic characteristics of both liners, such as shear modulus (G), damping ratio (D), and degradation index (δ), were determined on the basis of soil suction and loading cycles. Results indicated a descending trend of shear wave velocity with an increase in suction up to 130 MPa, and a significant reduction in shear modulus was detected. Meanwhile, the damping ratio demonstrated a significant increase with the increase in the suction levels of both liners. The reported results are of great significance for sustainable design and modeling of the unsaturated behavior of liner layers in several applications of geotechnical and geoenvironmental problems.

show abstract

Section: Shear Wave Velocitysupporting

confidence: 65%

Experimental Investigation for Shear Wave Velocity and Dynamic Characteristics of Unsaturated Sand–Clay Liners

Alnuaim,

Al-Mahbashi

2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…Numerous researchers confirmed that the mechanical and hydraulic behaviors of compacted soils are influenced by soil suction (Chen and Yu [2]; Cui and Delage [3]; Alonso et al [4]; Wheeler and Sivakumar [5]; Ng and Chiu [6]; Rao and Revanasiddappa [7]; Cokca et al [8]; Yang et al [9]; Yang and Lin [10]). In engineering practice, the soil suction has been considered to be an important factor in the design and construction of ascompacted soils (Yang et al [11]; Kung et al [12]).…”

Section: Introductionmentioning

confidence: 88%

Variation of Initial Soil Suction with Compaction Conditions for Clayey Soils

2012

View full text Add to dashboard Cite

In this study, the initial soil suction of as-compacted clayey soils was evaluated for various compaction conditions, covering a wide range of compaction energy and molding water content. The soil specimens were prepared by impact compaction under three levels of compaction energy. The filter paper method was used to measure the initial soil suction of as-compacted specimens. Test results indicate that the relationship between the soil suction and the molding water content is bilinear under three different compaction energies. However, the effect of compaction energy on soil suction is different for the soils with different amounts of clay fraction and is elucidated by the macro soil properties. The change of soil suction due to different compaction energies can be predicted by the void ratio and the degree of saturation.

show abstract

“…the maximum shear modulus G max ), the shear strength was normalized using different geotechnical parameters [35]. Three geotechnical parameters which have an effect on the bender element data were used to normalize of; moisture content, density and applied normal stress [4,36]. The normalized shear strength (τN) was compared to the maximum shear modulus (Gmax) in Fig.…”

Section: Prediction Of Physical Soil Properties Using Bender Element ...mentioning

confidence: 99%

“…While the seismic laboratory test (i.e. bender element test) is a non-destructive method and the sample will remain intake [4,5]. The bender elements are plates made of a piezoelectric material which has the capability to either convert an applied electric voltage into mechanical motion or convert an applied mechanical motion into an eclectic voltage.…”

Section: Introductionmentioning

confidence: 99%

“…In Zeng and Ni [7]; Ueno et al [8]; Asadi et al [9] and Choo et al [10] the effect of the moisture content and density were not considered. Yang and Lin [4]. Pintado et al [11] and Sadeghzadegan et al [12] used the residual lateritic soil, the bentonite and the sand-kaolinite mixture, respectively, to study the effect of the degree of saturation on the maximum shear modulus while density effect was not studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prediction the shear strength and shear modulus of sand-clay mixture using bender element

Alshameri¹

2022

J Appl Eng Science

View full text Add to dashboard Cite

Employing the conventional laboratory geotechnical methods such as shear box test to measure shear strength and shear modulus require destroying the samples which is seen as time consuming and costly. Whilst the bender element technique (BE) maintains the sample condition, time, and cost efficiency. Several sand-clay mixtures were compacted and subjected to bender element test as well as sheared using shear box test to measure and correlate shear modulus (t), shear strength (G) and the maximum shear modulus (Gmax). The results showed the critical stage (transition fines-grained) at fine-grained (FG) equal to 50% where any further increment beyond this value led to decrement the soil mixture strength. Both t and G were normalized using moisture content, density, and applied normal stress. Five empirical equations from the normalized shear strength tN were applied on the previous field data to exam their reliable and limitations. The equations indicated the importance of including the effect of overburden pressure for the natural sample as well as the in-situ moisture content and field density to avoid uncertainty in the predicted value of the soil shear strength and modulus. At no depth limitation, all empirical equations (tN1, tN2, tN3, tN4, and tN5) exceed ±20% lines which indicated a large variation in results. At depth limitation (< 5 m), only one equation corresponding to N4 showed reasonable validity and reliability to predict the shear strength. Similar was on the prediction of the shear modulus. The 5 m depth limit was recommended to apply the equation consistently.

show abstract

Influence of Soil Suction on Small-Strain Stiffness of Compacted Residual Subgrade Soil

Cited by 7 publications

References 7 publications

Experimental Investigation for Shear Wave Velocity and Dynamic Characteristics of Unsaturated Sand–Clay Liners

Experimental Investigation for Shear Wave Velocity and Dynamic Characteristics of Unsaturated Sand–Clay Liners

Variation of Initial Soil Suction with Compaction Conditions for Clayey Soils

Prediction the shear strength and shear modulus of sand-clay mixture using bender element

Contact Info

Product

Resources

About