Analisis Stabilitas Retaining Wall pada Blok Landfill Sanitari TPA

Abstract

Kestabilan dinding penahan tanah merupakan suatu hal yang paling penting dalam struktur pembangunan TPA. Untuk menunjang strukturnya, dinding penahan tanah kuat terhadap gaya geser, gaya guling dan daya dukung sehingga perlu dianalisis apakah dinding tersebut aman. Seperti halnya dinding penahan tanah pada TPA Dusun Sungai Basah Tadukan Raga Kecamatan STM Hilir Kabupaten Deli Serdang yang menunjukan tumpukan tanah lebih tinggi dari pada dinding penahan tanah. Penelitian ini bertujuan untuk mengetahui nilai faktor keamanan dinding penahan tanah. Pada TPA dusun sungai basah menggunakan metode perhitungan analisis coulomb dan rankine. Hasil analisis menunjukan bahwa metode rankine pada perhitungan stabilitas gaya guling pada rankine mendapatkan hasil SF 1,858>1,5 sedangkan coulomb SF 2,039>1,5. Stabilitas terhadap gaya geser untuk rankine 1,8488>1,5 sedangkan coulomb 2,032>1,5 dinyatakan aman. Faktor keamanan daya dukung tanah mendapat hasil 3,83>1,5 dinyatakan aman. Dari hasil analisis dapat disimpulkan dinding penahan tanah TPA dusun sungai basah aman terhadap gaya geser, gaya guling dan daya dukung tanah. The stability of retaining walls is the most important thing in the landfill construction structure TPA. To support the structure, retaining walls area strong against shear forces, overeturning forces and the bearing capacity of the soil so it is necessary to analyze whether the walls are safe. As is the case with the retaining wall at the Dusun Sungai Basah Tadukan Raga Landfill, STM Hilir District, Deli Serdang district. Which shows that the pile of soil is higher than the retaining wall. At the wet river hamlet landfill using coulomb and rankine analysis calculation methods. The results of the analysis of the rolling force on the rankine results in SF 1.858>1.5 while the coulomb SF is 2.039>1.5. Stability against shear force for rankine 1.8488>1.5 while coulomb 2.032>1.5 is declared safe. The safety factor for soil bearing capacity was 3,83>1,5 and was declared safe. From the results of the analysis it can be concluded that the retaining walls of the sungai basah landfill are safe against shear forces, overturning forces and the carrying capacity of the soil.