Investigating Field Behavior of Expansive Clay Soils

McKeen, R G

doi:10.1061/40592(270)5

Cited by 13 publications

(14 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the present analysis, the amplitude of surface suction change, ψ o , can be considered the minimum of (6.0 − ψ e ) or (ψ e − 2.0) [23] and is calculated for the different locations in the KSA, as shown in Table 2. [44] developed a chart to determine the SCI, as shown in Figure 2. The chart is divided into mineralogical groups according to clay activity, A c ¼ PI=% Clay, and the cation exchange activity, CEAc ¼ CEC=% Clay.…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

Estimating the Climate-Controlled Soil Parameters and the Distorted Mound Shape for Analysis of Stiffened Rafts on Expansive Soils

Abu-Ali,

El-Garhy,

Boraey

et al. 2024

Advances in Civil Engineering

View full text Add to dashboard Cite

A stiffened raft is considered one of the efficient foundation systems for lightweight structures resting on expansive soils. Most existing design methods of stiffened rafts require an analysis of the interaction between the raft and the distorted mound shape of the expansive soil. In most design methods, the distorted mound shape is represented in 2D by the edge distance and the maximum differential movement through a nonlinear equation. This study presents a rational method for estimating the climate-controlled soil parameters that are used for estimating the 3D distorted mound shape of the expansive soil from the routine geotechnical tests’ results. These parameters include the equilibrium soil suction, the amplitude of surface suction change, the diffusion coefficient of the soil, the suction compression index, and the active zone depth. The proposed method is explained through its application to calculate the climate-controlled parameters for expansive soils in different locations throughout Saudi Arabia. A parametric study is carried out using a suction diffusion and soil movements program called SUCH to investigate the effect of the climate-controlled soil parameters and raft dimensions on the shape of the distorted mound, maximum differential movement, and edge moisture variation distance. The results of the parametric study are used in a regression analysis to develop an equation for estimating the edge moisture variation distance, which is considered a major barrier to using existing design methods of stiffened rafts as a function of the climate-controlled soil parameters and the aspect ratio of the raft. The findings indicate that the aspect ratio of the raft and the climate-controlled soil parameters have a significant effect on the shape of the distorted mound, its maximum differential movement, and its edge moisture variation distance. Additionally, the proposed equation of the edge moisture variation distance predicts comparable values to that estimated by the program SUCH.

show abstract

Section: Advances In Civil Engineeringmentioning

confidence: 99%

Estimating the Climate-Controlled Soil Parameters and the Distorted Mound Shape for Analysis of Stiffened Rafts on Expansive Soils

Abu-Ali,

El-Garhy,

Boraey

et al. 2024

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…(2001) estimated it to be about 15-28m. Thompson (1997) and McKeen (2001) assume that an equilibrium suction profile exists below the depth of wetting. At the surface the suction fluctuates due to the climatic conditions.…”

Section: Depth Of Wetting and Active Zonementioning

confidence: 99%

“…Thompson (1997) developed two approaches, swell testing and suction measurement, to calculate potential future heave. McKeen (2001) mentioned that the plot of suction versus depth is the direct method to estimate the active zone depth which has been used in his method to calculate heave.…”

Section: Depth Of Wetting and Active Zonementioning

confidence: 99%

Effect of soil replacement option on surface deflections for expansive clay profiles

Bharadwaj

2013

Advances in Unsaturated Soils

View full text Add to dashboard Cite

“…Their work is considered a valuable reference in this field. McKeen ( 11 ) introduced variable designs to suit airport pavements for expansive soil in a technical report. Pavement design for expansive soil has been addressed by many researchers.…”

mentioning

confidence: 99%

Sustainable Road Shoulders and Pavement Protection for Expansive Soil Zones

Dafalla

Shaker

Al‐Shamrani

2022

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

The design of sustainable infrastructure roads in semi-arid highly expansive soil is of concern to the geotechnical and pavement design engineers. The damage and distress caused to highways and roads in areas with high swell potential occur as a result of ingress and infiltration of water to the underside of light pavements. These pavements exert very low stresses on the ground. Protection of subgrade and shoulders against variation in moisture content as a result of seasonal weather fluctuation and floods can help in establishing a sustainable pavement for an extended lifetime. Predicting the response of a subgrade soil subjected to different rainfall intensity and frequencies is very challenging. The approach proposed in this study is to target a reduction of moisture exposure to prevent water from entering the systems. However, efficient protection is required when severe floods occur so as to remove water from the shoulders in a short time. The sloping shoulders are intended to guide floodwater away from the pavement. Clay-sand liners can be constructed as a dressing layer along the shoulders or within the body of the shoulder extending up to the toe of the slope or beyond. Assessment of a typical sand–clay liner was conducted. Suggested designs were based on characterization, compressibility, and hydraulic conductivity tests. It was found that stresses exerted on the liners do not pose a significant settlement hazard.

show abstract

Investigating Field Behavior of Expansive Clay Soils

Cited by 13 publications

References 2 publications

Estimating the Climate-Controlled Soil Parameters and the Distorted Mound Shape for Analysis of Stiffened Rafts on Expansive Soils

Estimating the Climate-Controlled Soil Parameters and the Distorted Mound Shape for Analysis of Stiffened Rafts on Expansive Soils

Effect of soil replacement option on surface deflections for expansive clay profiles

Sustainable Road Shoulders and Pavement Protection for Expansive Soil Zones

Contact Info

Product

Resources

About