Use of RCC pile, anchor bolt and geogrid for building construction on the unstable slope

Abstract

Rapid construction of buildings in urban area is creating lack of space available for new construction. This problem enforced to construct building on slope in hilly regions. However, the engineers and designers are concerned with the stability analysis of structures built on soil slopes, as it is difficult to achieve a uniform structural level on mountainous terrain. Also, it cannot be reduced to the same level of structural forms and part of base member may not be bound by an identical horizontal plane. The fundamental stability of the structure built on hill slope depends upon on its slope stability. Slope failure has been identified as one of the frequent devastating natural disasters that have claimed huge loss of property and lives. Therefore, in this research, “Phase 2 (2002)”, a Rocscience Finite Element (FE) program and “Slide”, a Rocscience limit equilibrium program were used to simulate and analyze a complex multi-staged model with RCC pile, Anchor Bolt and Geogrid for the stability analysis of slope. Bishop’s method was used to evaluate and analyze the factor of safety. Analysis of the two section (Section 1-1 and 2-2) of slope was taken into consideration for slope stability analysis. As per the analysis using the limit equilibrium approach, the factor of safety for existing slope at Section 1-1 and Section 1-1 was found to be 0.579 and 0.70 respectively. Moreover, it was found that the factor of safety of slope was increased significantly from 0.579 to 1.593 in Sections 1-1 and 0.70 to 1.319 in Section 2-2. In addition, the factor of safety of slope with strength reduction method is 1.408 and 1.05 for Sections 1 and 2 respectively after slope stabilization work in seismic condition. This shows that, the construction of buildings in slope terrain is possible, but it needs specialized excavation and slope protection work. RCC pile with anchor bolt and geogrid is one of the sustainable solutions for construction of structure in slope area.

Construction of Geosynthetic–Reinforced Pavements and Evaluation of Their Impacts

“…Typically, there are three types of geogrids with uniaxial, biaxial, and triaxial grids offering reinforcement in one, two, or three directions, respectively. Geogrids have been widely used in civil engineering applications, such as in brick structures to mitigate the impact of seismic activity [2], in pile-supported deep foundation structures to enhance their resilience [3], to reinforce and stabilize soils on slopes for building construction [4], and to reinforce weak subgrade materials in railway construction [5]. Geogrids are also widely applied in pavement structures as they can greatly strengthen an asphalt layer and mitigate reflective cracking.…”