STUDI ANALISIS STABILITAS LERENG PADA STA 4+850 PROYEK JALUR PANSELA TRENGGALEK DENGAN PROGRAM SLOPE/W

Abstract

ABSTRAK

Proyek Jalur Pansela Trenggalek yang menghubungkan dengan kabupaten Tulungagung lewat jalur selatan didominasi perbukitan yang curam. Ada beberapa titik-titik rawan longsor di sepanjang jalan yang membahayakan pengguna jalan. Lereng memiliki tinggi 9,43 meter, nilai sudut geser tanah sebesar 7 derajat sehingga masuk klasifikasi tanah very loose (sangat lepas). Lereng memiliki kemiringan 45 derajat, berdasarkan klasifikasi kelas lereng, lereng ini masuk kelas VI atau sangat curam. Sehingga dari karakteristik tersebut, lereng memiliki kemungkinan untuk terjadi longsor. Analisa kestabilan lereng eksisting secara manual dengan metode bishop sebesar 1,225 dan untuk metode fellenius sebesar 1,213. Kemudian analisis kestabilan lereng dengan bantuan program Slope/W menggunakan metode bishop sebesar 1,269 dan untuk metode fellenius sebesar 1.257.

Kata kunci: Soil Nailing, Perkuatan Lereng, Geostudio Slope/W

ABSTRACT

Trenggalek Pansela Project that connects with Tulungagung Regency through the southern route is dominated by steep hills. There are several points prone to landslides along the road that endanger road users. The slope has a height of 9.43 meters, a soil shear angle of 7 degrees, categorizing the soil as "very loose." The slope has a gradient of 45 degrees. Based on slope class classification, this slope falls into Class VI or highly steep category. Thus, based on these characteristics, the slope has a potential for landslides to occur. The stability analysis of the existing slope was manually performed using the Bishop method, yielding a factor of safety of 1.225, and using the Fellenius method, yielding a factor of safety of 1.213. Subsequently, a slope stability analysis was conducted using the Slope/W software, resulting in a factor of safety of 1.269 for the Bishop method and 1.257 for the Fellenius method..

Keywords: Soil Nailing, Slope Reinforcement, Geostudio Slope/W