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A platform for research: civil engineering, architecture and urbanism
Stabilization of Expansive Soil Using Lime Sand Piles—A Case Study
This paper presents a case study of the stabilization of expansive soil using lime sand piles. The technique was used in the construction of flexible pavement on expansive soil of Dr. MGR Bus terminus of the Salem Municipal Corporation in Tamil Nadu, India. The soil profile at the site was a layered system with the first layer filled with earth from Salem quarry. The second layer is silty clay followed by silty sand in only certain locations. The fourth layer was gravelly sand followed by weathered rock. The filled up earth in this site is non-plastic silty sand. The silty clay layer possesses high plasticity which will undergo volume change due to moisture content. This clay was black in color and indicated the presence of organic content between 20 and 30%. This kind of soil is always referred to as a problematic soil and is locally known as black cotton soil. Generally, any new structure is to be laid on the surface of original ground level but as in this site the original ground is a problematic soil and would always cause the failure of lightly loaded structure it required stabilization. The stabilization of second silty layer which required improvement in strength and improvement of reduction in volume change characteristics was achieved using lime stabilization. Out of many different lime stabilization techniques, lime sand pile was preferred for the site because of its proven performance, durability, constructability, and low cost. The stabilization using lime sand piles was achieved methodically. After curing the site for maximum of 30 days, flexible pavement was laid on the prepared ground. The design field CBR value of 15% was ensured after ground improvement before laying the pavement. The selection of material and construction of pavement were as per MORTH revision 5 “Specification for road and bridge works,” 2013, and design of pavement was as per IRC 37-2012.
Stabilization of Expansive Soil Using Lime Sand Piles—A Case Study
This paper presents a case study of the stabilization of expansive soil using lime sand piles. The technique was used in the construction of flexible pavement on expansive soil of Dr. MGR Bus terminus of the Salem Municipal Corporation in Tamil Nadu, India. The soil profile at the site was a layered system with the first layer filled with earth from Salem quarry. The second layer is silty clay followed by silty sand in only certain locations. The fourth layer was gravelly sand followed by weathered rock. The filled up earth in this site is non-plastic silty sand. The silty clay layer possesses high plasticity which will undergo volume change due to moisture content. This clay was black in color and indicated the presence of organic content between 20 and 30%. This kind of soil is always referred to as a problematic soil and is locally known as black cotton soil. Generally, any new structure is to be laid on the surface of original ground level but as in this site the original ground is a problematic soil and would always cause the failure of lightly loaded structure it required stabilization. The stabilization of second silty layer which required improvement in strength and improvement of reduction in volume change characteristics was achieved using lime stabilization. Out of many different lime stabilization techniques, lime sand pile was preferred for the site because of its proven performance, durability, constructability, and low cost. The stabilization using lime sand piles was achieved methodically. After curing the site for maximum of 30 days, flexible pavement was laid on the prepared ground. The design field CBR value of 15% was ensured after ground improvement before laying the pavement. The selection of material and construction of pavement were as per MORTH revision 5 “Specification for road and bridge works,” 2013, and design of pavement was as per IRC 37-2012.
Stabilization of Expansive Soil Using Lime Sand Piles—A Case Study
Lecture Notes in Civil Engineering
Latha Gali, Madhavi (editor) / Raghuveer Rao, P. (editor) / Premalatha, K. (author) / Sabarishri, K. (author)
2020-09-12
9 pages
Article/Chapter (Book)
Electronic Resource
English
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