Title: Laboratory Determination of the Time-Dependent Interface Frictional Behavior between Cohesive Soil and Construction Materials
Abstract: Soil-structure interface systems are encountered in various Geotechnical Engineering projects such as pile foundations, retaining structures, and pipeline infrastructure. The interaction between soil and structures is complex and increases in complexity after movements or failure. Research has shown that residual strength within a soil mass or along a soil/structure interface can increase, yet is difficult to quantify. Also, after structures are installed, the frictional interaction between the soils and the structure tends to increase. This increase has been attributed to many factors including the dissipation of induced excess pore water pressure, soil aging, or the relaxation of the arching effect. Understanding this behavior to be able to predict the amount of increase can significantly improve design and analysis efficiency of many geotechnical and structural engineering projects. A testing procedure has been developed to quantify the change in residual strength over time utilizing a standard direct shear machine. This procedure experimentally quantifies the amount of interface frictional strength increase over time between soil and various types of construction materials. An undisturbed silty, clay soil was tested to determine the changes of interface residual shear strength with time when interacting with steel and concrete plates. The results are consistent with previous experimentation that there is a considerable increase in shear strength as time increases. Also, the increase of shear strength is higher between the soil and concrete than it is with steel.
Publication Year: 2015
Publication Date: 2015-03-17
Language: en
Type: article
Indexed In: ['crossref']
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