Abstract
Characteristic geotechnical properties of soil vary from place to place. The classification of soil mass depends on rock family from which it originates its mineral composition and the environmental aspect of the area. Civil engineering structure is founded in or on the surface of the earth, and hence before designing any structures, it is necessary to closely observe the suitability of a soil for construction. Properties of soils observed before construction and after the construction of earth retaining structures (ERS) influences the stability of structures. Most of the geotechnical properties of surrounding soils in the vicinity of ERS changes after the construction of the ERS. In a developing country like India, the population density is very high due to which people are forced to reside in landslide-prone areas and this initiates the need to construct Earth Retaining Structures. The stability of these ERS is very crucial to protect the vulnerable slopes. If the ERS are displaced even slightly it can create havoc by bringing the lives and property in danger. In this paper, different geotechnical properties of soils such as specific gravity, density index, consistency limits, particle size analysis, compaction, consolidation, permeability, and shear strength have been studied for observing the changes in geotechnical properties of the soil before and after the construction of Earth Retaining Structures and conclusions are noted. This paper attempts to find out the correlation between the displacement of ERS against changes in soil characteristics using GNSS technology. It is observed from past research studies that GNSS technology can be used for tracing out the precise location of any object or structure. Keeping this in mind, the soil sample in the vicinity of ERS was regularly checked in the laboratory to correlate the soil characteristics and location of the ERS. The practice of testing the soil characteristics in the laboratory was consistently followed. From the laboratory and field tests observation, it has been observed that soil characteristics of the soil in the vicinity of ERS change even with the minor displacement of the ERS from its initial position. Hence, GNSS technology can be used to give early warnings related to major displacements of ERS that could take place in the future. Thus GNSS technology can be used to produce a low-cost early warning system for the displacement of ERS so that a warning about a probable landslide can be received well in advance to evacuate the area and save life and property.
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Dhawale, A., Bobade, S.S., Tapase, A., Garg, V. (2020). Investigation on Geotechnical Properties Before and After the Construction of Earth Retaining Structures-West Konkan a Case Study. In: Hoyos, L., Shehata, H. (eds) Advancements in Unsaturated Soil Mechanics. GeoMEast 2019. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-34206-7_6
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