Loaded Areas-Induced Proximity Interaction Effect on the Depth of Influence in Layered Soil
Volume Title: ICASGE2025
Paper ID : 1066-ICASGE-FULL (R2)
Authors
1Tanta university
2Geotechnical Engineering (GEO)
Abstract
The vital step in the foundation design is to determine the depth of influence which is essential to prevent the overestimation of induced settlement that could exceed the tolerable limits, which could necessitate transitioning foundation systems from isolated footings to rafts or deep foundations. Similarly, in soil improvement conditions such as preloading with vertical drains or deep replacement, underestimating the required treatment depth may lead to ineffective improvement. Both scenarios can result in significant cost overruns. This challenge becomes particularly encountered in cases such as closely spaced buildings or tank farms, where the interaction between adjacent loaded areas can significantly affect on the depth of influence that may extend to weak underlying layers, resulting in larger settlements and subsequently on structure stability and integrity. The analysis is initially carried out on a single loaded area subjected to a typical range of applied pressures to determine the depth of influence. Then, a reanalysis is conducted to investigate the effect of interaction between adjacent loaded areas on the depth of influence in a layered soil profile, specifically sand underlain by clay
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