Reinforced soil retaining wall for ash handling facility Java 9 and 10 coal-fired steam power

¹ Geoforce Indonesia, Engineering Department, 10210 Central Jakarta, Indonesia
² Geoforce Indonesia, Engineering Director, 10210 Central Jakarta, Indonesia
³ Geoforce Indonesia, Head of Director, 10210 Central Jakarta, Indonesia

^* Corresponding author: raffly.md@gmail.com

Abstract

The construction of coal ash handling facilities requires a large area to store large amounts of Fly Ash and Bottom Ash (FABA) material. Bund wall is proposed near the facility to be built FABA stockpile up to EL.+80.0. The area of the proposed bund wall is very limited, so a vertical earth retaining wall is proposed to maintain the FABA backfill as well as support the proposed Hauling Road. In this case, Geoforce Segmental Retaining Wall (GSRW) is adopted as one type of soil reinforcement, the construction is a combination of reinforcing elements in the form of geosynthetic strip (GI Strips) that interact with the filling material through friction and provide tensile capacity. The combination works as a gravitational structure capable of withstanding lateral ground pressure. This GI Strip material is produced in Indonesia so that it has a high “Tingkat Komponen Dalam Negeri” (TKDN) value. GSRW works are 820 m long with a height of 19.44 m. The analysis carried out was assisted by the PLAXIS 3D program to understand the deformation in the structure and obtain safety factors according to the requirements in “SNI Persyaratan Perancangan Geoteknik 8460:2017”.