Pantai Pasangkayu memiliki banyak pemukiman penduduk yang berada di pesisir pantai. Pada musim gelombang tinggi ancaman abrasi di daerah yang secara ekonomi penting ini memiliki dampak yang signifikan terhadap kondisi sosial ekonomi masyarakat. Oleh karena itu, sangat diperlukan pencegahan serta penanggulangan abrasi di Pantai Pasangkayu salah satunya dengan pembuatan seawall ini.. Tugas akhir ini bertujuan untuk mengetahui stabilitas seawall terhadap bahaya gaya geser, gaya guling, dan daya dukung tanah baik dalam kondisi normal maupun kondisi gempa, Analisis dilakukan dari data berdasarkan gambar konstruksi, data sondir dan data tanah. stabilitas bangunan dihitung secara manual dan menggunakan program GEO5. Hasil analisis stabilitas pada bangunan sea wall diperoleh saftey factor (SF) dengan perhitungan manual pada kondisi normal yaitu SF Geser = 2,02 > 1,5. SF Guling = 2,49 > 2,0 dan SF Daya dukung tanah = 9,53 < 13,832. Pada kondisi gempa diperoleh SF Geser = 1,24 > 1,1. SF Guling = 2,19 > 1,5 dan SF Daya dukung tanah = 11,19 < 13,832. Analisis pada program GEO5 diperoleh saftey factor (SF) pada kondisi normal yaitu SF Geser = 12,86 > 1,5. SF Guling = 4,07 > 2,0 dan SF Daya dukung tanah = 6,91 > 3. Pada kondisi gempa diperoleh SF Geser = 1,64 > 1,1. SF Guling = 2,31 > 1,5 dan SF Daya dukung tanah = 7,39 > 1,00.
Pasangkayu Beach has many settlements located on the coast. In the high wave season the threat of abrasion in this economically important area has a significant impact on the socio-economic conditions of the community. Therefore, it is very necessary to prevent and overcome abrasion in Pasangkayu Beach, one of which is by making this seawall. This final project aims to determine the stability of the seawall against the dangers of slip, overturning, and soil bearing capacity both under normal conditions and earthquake conditions, Analysis is carried out from data based on construction drawings, sondir data and soil data. building stability is calculated manually and using the GEO5 program. The results of the stability analysis on the sea wall building obtained saftey factor (SF) with manual calculations under normal conditions, namely SF Slip = 2,02> 1,5. SF overturning = 2,49 > 2,0 and SF Bearing capacity = 9,53 < 13,832. Under earthquake
conditions, SF Slip = 1,24 > 1,1. SF Overturning = 2,19 > 1,5 and SF Bearing capacity = 11,19 < 13,832. Analysis in the GEO5 program obtained saftey factor (SF) under normal conditions, namely SF Slip = 12,86 > 1,5. SF Overturning = 4,07 > 2,0 and SF Bearing capacity = 6,91 > 3. In earthquake conditions obtained SF Slip = 1,64 > 1,1. SF Overturning = 2,31 > 1,5 and SF Bearing capacity = 7,39 > 1,00.