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Evaluation and Remediation of a Slope
Sanjeev Kumar Assistant Professor, Department of Civil Engineering Vijay K. Puri Associate Professor | |
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ABSTRACT |
This paper presents a case study of evaluation and stabilization of an existing slope in St. Louis, Missouri. The slope was constructed about 20 years ago by placing fill on the side slope of a valley. The facilities on the top of the slope consist of two underground gas storage tanks and a single-story commercial unit with walk-out basement. An investigation was conducted to assess the stability of the slope in its existing condition and if any remedial measures were necessary. In-situ investigation consisted of boring and sampling, open pit examination, and installation and monitoring of bore hole inclinometers. The results of stability analysis indicated that the slope in its existing condition was potentially unstable. Several alternatives were examined for enhancing the stability of the slope taking into consideration the facilities on the top, steepness of the slope, limited space available for mobilization of construction equipment, and presence of overhead utilities. It was determined that the remediation could be best achieved either by construction of a rock buttress, or continuous retaining wall drilled piers, or a combination of the two. Remediation of the slope by installation of a rock buttress was selected and constructed. The slope is performing satisfactorily since its remediation.
Keywords: Drilled Piers, Remediation, Rock Buttress, Stabilization, Slope
