Electronic Theses and Dissertation

Sebuah penelitian telah dilakukan di jalan jantho-lamno untuk mengidentifikasi dan mengatasi risiko tanah longsor melalui analisis cepat rambat gelombang seismik dan resistivitas batuan. fokus penelitian adalah evaluasi kondisi geologis dan penentuan daerah yang rentan terhadap kegagalan lereng menggunakan metode seismik dan resistivitas pada tiga lintasan yang dipilih: lamno (l1), jantho (l2), dan jantho (l3). hasil penelitian menunjukkan adanya tiga lapisan berdasarkan nilai cepat rambat gelombang dan resistivitas pada setiap lintasan. lapisan tersebut terdiri dari alluvium dengan cepat rambat 0,3-0,9 km/s dan resistivitas 10-130 Ωm, batu pasir dan lempungan dengan cepat rambat 0,9-1,9 km/s dan resistivitas 130-250 Ωm, serta batugamping dengan cepat rambat 1,9-2,9 km/s dan resistivitas 250-600 Ωm. model struktur bawah permukaan mengungkap potensi deteksi lapisan weakzone melalui perbandingan metode seismik refraksi dan resistivitas. lintasan lamno (l1) dan jantho (l2) berpotensi mengalami longsoran rotasi tipe rotational slip, sementara jantho (l3) cenderung mengalami longsoran translasi tipe translation slip. untuk mitigasi risiko tanah longsor, identifikasi zona lemah pada tanah pondasi menjadi kunci. solusi yang diusulkan mencakup dinding penahan tanah, pemakuan tanah, shotcrete, wire mesh, net rock bolting, perubahan profil lereng, dan pembangunan drainase. setiap solusi disesuaikan dengan karakteristik geologis dan tipe longsoran di setiap lintasan. penelitian ini memberikan pandangan mendalam tentang kondisi geologis di sepanjang jalan jantho-lamno dan memberikan landasan untuk strategi mitigasi yang efektif. implikasinya melibatkan upaya perlindungan terhadap infrastruktur dan lingkungan sekitarnya, dengan harapan dapat mengurangi dampak risiko tanah longsor di wilayah ini. kata kunci : zona lemah, resistivitas, gelombang seismik, longsor, mitigasi

A study has been conducted on the Jantho-Lamno road to identify and address the landslide risks through rapid seismic wave propagation and rock resistivity analysis. The research focuses on evaluating geological conditions and determining areas prone to slope failure using seismic and resistivity methods on three selected tracks: Lamno (L1), Jantho (L2), and Jantho (L3). The research findings indicate the presence of three layers based on wave propagation velocity and resistivity values along each track. These layers consist of alluvium with a wave propagation speed of 0.3-0.9 km/s and resistivity of 10-130 Ωm, sandstone and clay with a wave propagation speed of 0.9-1.9 km/s and resistivity of 130-250 Ωm, and limestone with a wave propagation speed of 1.9-2.9 km/s and resistivity of 250-600 Ωm. The subsurface structure model reveals the potential detection of weak zone layers through a comparison of seismic refraction and resistivity methods. Lamno (L1) and Jantho (L2) tracks are potentially prone to Rotational Slip-type landslides, while Jantho (L3) tends to experience Translation Slip-type landslides. For landslide risk mitigation, identifying weak zones in the foundation soil is crucial. Proposed solutions include retaining walls, soil nailing, shotcrete, wire mesh, net rock bolting, slope profile modifications, and drainage construction. Each solution is tailored to the geological characteristics and landslide types along each track. This research provides an in-depth understanding of the geological conditions along the Jantho-Lamno road and lays the groundwork for effective mitigation strategies. The implications involve efforts to protect infrastructure and the surrounding environment, with the hope of reducing the impact of landslide risks in this region. Keywords: weak zone, resistivity, seismic wave, landslide, mitigation