Abstract
Experimental tests were conducted to study the behavior of skirted foundations rested on dry medium sandy soil subjected to vertical and inclined loads. To achieve this goal, a small-scale physical model was designed and performed which contained an aluminum circular footing (100 mm) in diameter and (10 mm) in thickness and skirts with different heights, local medium poorly graded dry sand is placed in a steel soil container (2 mm) thick with internal dimensions (1000 mm x 1000 mm in cross section and 800 mm in height). The main objective of this study was to evaluate the response of skirt attached to the foundation at different skirt (L/D) ratios (0.0, 0.5, 1.0 and 1.5) and is subjected to point load at different angles of inclination (θ) (90 °, 80 °, 70 ° to 60 °) varying with the horizontal. In all tests, the relative density of sand was kept constant and equal to (60%). Four tests were conducted on a foundation without a skirt, for comparison reasons, and twelve tests were conducted on a skirt attached to foundation. The results showed that with decreasing the angle of inclination of load with the horizontal the load carrying capacity decreased due to increase the horizontal component of applied load which leads to increase the shear stresses under the foundation, however that effect decreases with increase the skirt height.
Highlights
Civil engineers have adopted many methods in recent years to enhance the carrying capacity of vertical and lateral loads and to reduce rotation, sliding and settling for foundations supported by different methods on soils; for example, soil reinforcing, deep compaction, grouting, etc
A series of (16) experimental tests were carried out to determine the behavior and to analyses the response of shallow foundation, in addition to skirt foundation resting on medium dense sandy soil with relative density (60%) subjected to vertical and inclined loads
The failure load of shallow foundation can be defined as the maximum load at which unlimited excessive displacement of the foundation occurred without any increase in an applied load
Summary
Civil engineers have adopted many methods in recent years to enhance the carrying capacity of vertical and lateral loads and to reduce rotation, sliding and settling for foundations supported by different methods on soils; for example, soil reinforcing, deep compaction, grouting, etc. Some of these methods may be expensive, restricted and difficult to implement. It has proven to be competitive alternatives to more traditional foundation solutions like piles in different types of soil, resulting in cost savings through material reduction and installation time consumption. It is utilized in soil with low surface strength as an alternative to deep foundation (Al-Aghbari, 2007; Salih and Joseph, 2010; El Wakil, 2013; Thakare and Shukla, 2016)
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