Abstract
The presence of underground voids in regions suitable for sustainable development can adversely affect the stability of the overlying infrastructures. In this paper, the collapse loads of strip rigid footings resting on sand with single and double continuous voids are determined for a frictional Mohr-Coulomb material following the non-associated flow rule. For use by practitioners, design charts are proposed to evaluate the well-known bearing capacity factor Nγ as a function of the dimensionless parameters related to the vertical and horizontal void distances from the footing, void shape, and spacing between the two voids, as well as the soil friction angle. The computational result compares quite favorably with the available theoretical and numerical solutions. The failure mechanism is broadly discussed based on the pattern of soil displacement around the footing and void.
Highlights
Civil engineering design and construction processes have emphasized the safety and serviceability of infrastructure
Sustainability 2019, 11, 3966 where, qu is the ultimate bearing pressure, c is the cohesion of the soil, q is the surface surcharge, Dis the depth of embedment, γ is the unit weight of soil, B is the width of the footing, and Nc, Nq, and Nγ are the non-dimensional bearing capacity factors related to cohesion, surcharge, and soil weight, which are all functions of the soil friction angle φ
This study presents a comprehensive set of Nγ values for strip footings resting on sand with a variety of void numbers, shapes, and locations, as well as a range of friction angles
Summary
Civil engineering design and construction processes have emphasized the safety and serviceability of infrastructure. Sustainability 2019, 11, 3966 where, qu is the ultimate bearing pressure, c is the cohesion of the soil, q is the surface surcharge, Dis the depth of embedment, γ is the unit weight of soil, B is the width of the footing, and Nc , Nq , and Nγ are the non-dimensional bearing capacity factors related to cohesion, surcharge, and soil weight, which are all functions of the soil friction angle φ. Such additivity of the individual contributions simplifies the mathematical analysis substantially and this solution is widely used in engineering practice. No thorough analysis of the drained bearing capacity of strip footings on sand has been performed and the corresponding Nγ values are not available in literature
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call