Loose Ash Fills Reinforced With the High Confined Encased Stone Columns: Experimental and Numerical Investigation
- PDF / 2,313,377 Bytes
- 18 Pages / 547.087 x 737.008 pts Page_size
- 40 Downloads / 241 Views
(0123456789().,-volV) ( 01234567 89().,-volV)
ORIGINAL PAPER
Loose Ash Fills Reinforced With the High Confined Encased Stone Columns: Experimental and Numerical Investigation Sudheer Kumar Jala . Saurabh Rawat . Ashok Kumar Gupta
Received: 4 December 2019 / Accepted: 12 November 2020 Springer Nature Switzerland AG 2020
Abstract The use of industrial waste (ash) in largescale earthworks for civil engineering applications such as construction of highway embankments, the rise of ash dykes, the filling low-lying areas, fillings of buildings, solves the problem of waste disposal besides in addition to the conservation of the natural soils. It is has a low density, low consolidation, lower potential for bearing and higher settlement. To use these areas for construction purposes, it is necessary to reinforce them at deeper depths. The present study uses highly confined stone columns to investigate the strengthening of ash fills. A total of six cases are investigated, including slope reinforced with an encased stone column. Model tests were conducted with pond ash at 40% relative density with a circular footing on untreated and treated ash fills. The enhanced cases include ordinary stone columns,vertically encased columns with geotextile, vertically encased columns with geogrid, highly confined vertically encased columns with both geotextile and geogrids (HC-1) and highly encased columns with both vertical encased geotextile and horizontal geogrid (HC-2) layers. The parametric study includes an examination of load-settlement behavior, loadS. K. Jala (&) S. Rawat A. K. Gupta Department of Civil Engineering, Jaypee University of Information Technology, Solan, HP, India e-mail: [email protected] S. Rawat e-mail: [email protected]
carrying ratio, settlement reduction ratio, and stiffness factor, modulus of subgrade reaction and post-failure behavior of slopes reinforced with encased stone columns. In all cases, the high confined encased system yields better results. In each case, the stone column failure pattern of was observed at a distance range of 1–3 times the stone column diameter. Postfailure behavior indicates that for steep slopes where massive slip failures are expected, highly confined encased stone columns can be useful. Results are validated by the numerical modelling analysis of Plaxis. Keywords Stone columns Geotextile Geogrid Stiffness Modulus of subgrade reaction Load carrying capacity (LCR)
1 Introduction At present, nearly 184.14 million tons of coal ash is being produced annually in India and more than 70,000 acres of land are presently occupied by ash ponds. The use of ash in various applications in civil engineering such as brick making, cement, concrete, and soil stabilization has been doing, and it is recognized. In India fifty nine cities municipal solid waste occupies the 9233 sq.km of land, height of the dumps vary from 3 m to several meters. The maximum constitution of municipal solid waste at produces
123
Geotech Geol Eng
sources and collection points was discovere
Data Loading...
