Journal ArticleDOI
Shrinkage Behaviour of GPA-Reinforced Expansive Clay Beds Subjected to Swell–Shrink Cycles
M. Muthukumar,B. R. Phanikumar +1 more
TLDR
In this paper, the authors present experimental data on shrinkage of Granular Panchor-reinforced expansive clay beds, which are subjected to three swell-shrink cycles, each cycle monitoring swelling for 10 days and shrinkage for 90 days.Abstract:
Expansive soils undergo alternate swelling and shrinkage respectively in rainy seasons when they absorb water and in summers when water evaporates from them. Hence, all types of foundations constructed in expansive soils are also subjected to alternate swelling and shrinkage in rainy and summer seasons. As a result, super-structure members are also affected, undergoing severe distress. Various tension-resistant and innovative foundation techniques such as belled piers and under-reamed piles have been devised for arresting the problems posed by expansive soils. Granular pile-anchor (GPA) is a recent innovative technique suggested for expansive clay beds. GPA is quite effective in controlling heave or swelling. Useful experimental heave data were obtained on laboratory scale and field scale GPAs. However, it is also necessary to study the behaviour of GPA-reinforced expansive clay beds subjected to swelling and shrinkage. This paper presents experimental data on shrinkage of GPA-reinforced expansive clay beds. Laboratory scale GPA-reinforced expansive clay beds were subjected to alternate swell–shrink cycles, each cycle for a duration of 300 days. Each clay bed was subjected to three swell–shrink cycles (N = 1, 2 and 3), each cycle monitoring swelling for 10 days and shrinkage for 90 days. The number of GPAs (n) reinforcing the clay beds was varied as 0, 1, 2 and 3. Shrinkage (mm) of a clay bed, recorded in a given swell–shrink cycle, decreased with increasing number of GPAs (n). Further, shrinkage of a given clay bed decreased significantly with increasing number of swell–shrink cycles (N) also. It was also found that shrinkage (mm) of a particular layer in the clay bed decreased with increasing depth (z) of the layer from the top of the clay bed.read more
Citations
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Journal ArticleDOI
Mechanism of the Mudstone Tunnel Failures Induced by Expansive Clay Minerals
TL;DR: In this article, the authors studied the characteristics of expansive clays in order to understand the mechanism of tunnel failures in coal mine tunnel failures and found that the internal structure and mechanical strength of the mudstone is weakened by the illite-smectite and the montmorillonite mineral content as well as the combined action of underground water.
Journal ArticleDOI
Comparative study on the behaviour of granular pile anchors and helical pile anchors in expansive soils subjected to swelling
TL;DR: Several foundation techniques, such as belled piers, under-reamed piles, helical piles are adopted in expansive soils to avoid the problem posed by its swelling nature as mentioned in this paper.
Journal ArticleDOI
Engineering of ground with granular piles: a critical review
TL;DR: Granular piles/stone columns are one of the most commonly preferred ground engineering systems for improving a variety of weak soils, such as soft clays, loose sands, waste fills, and ash ponds.
Journal ArticleDOI
Heave performance of a ballastless track subgrade of double line high-speed railway filled with micro-expansive andesite under water immersion
TL;DR: In this article, an indoor physical model experiment of a ballastless track-subgrade filled with micro-expansive andesite at 1:2 scale was conducted to investigate the effects of the foundation swelling on the mechanical and deformation characteristics of the entire subgrade.
References
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Book
Unsaturated Soil Mechanics
Ning Lu,William J. Likos +1 more
TL;DR: Unsaturated Soil Mechanics as mentioned in this paper provides a comprehensive introduction to the fundamental principles of unsaturated soil mechanics and provides extensive sample problems with an accompanying solutions manual, and brings together the rapid advances in research in unsaturated soil mechanics in one focused volume.
Journal ArticleDOI
Coupling of hydraulic hysteresis and stress–strain behaviour in unsaturated soils
TL;DR: In this paper, a new elasto-plastic framework for unsaturated soils is proposed, involving coupling of hydraulic hysteresis and mechanical behaviour, and a specific constitutive model for isotropic stress states is proposed.
Book
Expansive Soils: Problems and Practice in Foundation and Pavement Engineering
John D. Nelson,Debora J. Miller +1 more
TL;DR: Expansive soils: problems and practice in foundation and pavement engineering as discussed by the authors, Expansive soil problems and practices in the field of pavement engineering and foundation and foundation engineering, etc.
Book
Foundations on expansive soils
TL;DR: In this article, an extension of the Fondation Reference Record is described. But this record was created on 2004-09-07, modified on 2016-08-08.
Journal ArticleDOI
Lime-Induced Heave in Sulfate-Bearing Clay Soils
TL;DR: In this article, the authors found abundant thaumasite, a complex calcium-silicate-hydroxide-sulfate-carbonate-hyd rate mineral, forming a solid solution series with ettringite.
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