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http://dx.doi.org/10.9720/kseg.2020.2.185

A Study on the Increase of Bearing Capacity of Soft Ground in Shallow Foundation Using High Density Rapid Expansion Material  

Ro, Euichul (Department of Civil Engineering, Chosun University)
Kim, Daehyeon (Department of Civil Engineering, Chosun University)
Publication Information
The Journal of Engineering Geology / v.30, no.2, 2020 , pp. 185-198 More about this Journal
Abstract
High-density rapid expansion material is a method that increases the solid volume of injection materials due to hydration and foam reactions at the same time as spraying. It is an effective method for securing ground stability, restoring subsidence, and loading during construction of structures. In this regard, through the mechanical experiments of injection materials, the stability of the foundation ground of the structure and the effect of increasing the endurance using site construction were analyzed. The results of the experiment showed that the unit weight of soil decreased by 10.5% after injection of the filling material, and the allowable support for the structure was deemed safe, and the subsidence by each section after ground improvement was determined to be safe at 2.28, 1.55 and 0.46 cm, respectively, with an acceptable subsidence of less than 5 cm. After the field test, five inclinometers were installed on the top floor of the target building to measure the displacement of the X and Y axes. As a result of the measurement, no displacement related to the phenomenon of inequality or subsidence cracks of the structure was measured for about 16 months (509 days) after construction. This can be judged to be a sufficient increase in the stability of the ground after the injection of rapid expansion.
Keywords
expansion material; foam reaction; allowable bearing capacity; consolidation; soft ground;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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