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Dutta, Sekhar Chandra
- Constructing Structures on Backfilled Opencast Mine Spoil for Better Sustainability
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Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (ISM), Dhanbad 826 004, IN
1 Department of Civil Engineering, Indian Institute of Technology (ISM), Dhanbad 826 004, IN
Source
Current Science, Vol 114, No 10 (2018), Pagination: 2053-2062Abstract
In this study we collate existing knowledge and suggest a possible methodology for construction on environmentally challenged backfilled mines to restore the sustainability of human settlement. The possibility of reconstruction on a backfill soil with a sustainable solution has been explored. The study highlights the issue of subsidence in backfilled opencast mines through a meticulous understanding of different case studies of construction on mine spoil. The prime focus of the study apart from structural and construction aspects includes the behaviour of heterogeneous mine spoil. Collapse settlement and hydrocompression are discussed to develop an understanding of failure in backfill. The study also incorporates the proposition of possible effective ground improvement treatment for improving soil behaviour through effective utilization of demolished concrete waste material. Further, ground improvement through demolished waste stone column has also been discussed. Finally, a feasible method for constructing a low-rise building on back-filled soil is proposed with available experimental data on bearing capacity. This study along with a comprehensive list of references may prove useful for conducting further research and a thorough understanding of the issues faced by the mining sector in India and other developing countries.Keywords
Opencast Mines, Backfill Soil, Collapse Settlement, Hydrocompression, Sustainability.References
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- Seismic Behaviour of RC Building with Raft Foundation in the Ganges Basin, India
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PDF Views:87
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (ISM), Dhanbad 826 004, IN
2 Jharkhand Urja Sancharan Nigam Limited, Ranchi 834 004, IN
3 Water Resources Department Madhya Pradesh, Bhopal 462 003, IN
1 Department of Civil Engineering, Indian Institute of Technology (ISM), Dhanbad 826 004, IN
2 Jharkhand Urja Sancharan Nigam Limited, Ranchi 834 004, IN
3 Water Resources Department Madhya Pradesh, Bhopal 462 003, IN
Source
Current Science, Vol 118, No 5 (2020), Pagination: 759-770Abstract
Many highly populated and important cities of India are situated in the Ganges basin. Deep alluvium deposit of this basin enhances the earthquake vulnerability of these cities due to amplification of seismic energies in the case of an earthquake. Raft foundations are generally provided for critical facility buildings due to their perceived effectiveness against differential settlement during earthquakes. However, the literature available on seismic behaviour of buildings with raft foundation considering soil deformability is relatively limited. In this context, a full three-dimensional finite element model of a four-storeyed building with raft foundation considering the typical layered soil profile of the Ganges basin has been developed in this study. The effects of different seismic parameters on the structural responses and moments induced in the raft have been studied with ground motions from 10 different earthquakes. Since the alluvium deposit of the Ganges basin is prone to get liquefied, effects of liquefaction of soil on the building with raft foundation have been considered simplistically. The results show that the raft foundation reduces the lateral displacement of the structure considerably. However, an increase in the vertical settlement of the raft in case of liquefiable soil is a matter of concern.Keywords
Layered Soil Profile, Raft Footing, River Basin, Soil–Structure Interaction.References
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Abstract Views :141 |
PDF Views:64
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology, Dhanbad 826 004, IN
1 Department of Civil Engineering, Indian Institute of Technology, Dhanbad 826 004, IN