PERENCANAAN DESAIN DINDING PENAHAN TANAH TIPE GRAVITY WALL PADA LERENG SUNGAI BRANTAS DI AREA PERMUKIMAN KECAMATAN WRINGINANOM, KABUPATEN GRESIK

GRAVITY WALL TYPE RETAINING WALL DESIGN ON THE BRANTAS RIVER SLOPE IN THE RESIDENTIAL AREA OF WRINGINANOM DISTRICT, GRESIK DISTRICT

Pertumbuhan penduduk menyebabkan kebutuhan akan rumah tinggal meningkat, banyaknya rumah-rumah tinggal yang berada di daerah lereng aliran Sungai Brantas Kecamatan Wringinanom Kabupaten Gresik tentunya berpengaruh terhadap kekuatan tanah di daerah tersebut sehingga dapat memicu terjadinya tanah longsor. Untuk mencegah terjadinya bencana tanah longsor diperlukan pemasangan dinding penahan tanah.

Analisa stabilitas lereng dilakukan untuk mengetahui lereng tersebut berpotensi untuk mengalami longsor. Analisa dilakukan dengan menggunakan bantuan software Geoslope. Perencanaan desain dinding penahan tanah harus sesuai dengan faktor keamanan menurut SNI 8460:2017 diantaranya, faktor keamanan guling, faktor keamanan geser, dan daya dukung tanah.

Dari analisis yang dilakukan di Lereng Aliran Sungai Brantas Kecamatan Wringinanom Kabupaten Gresik, didapatkan nilai stabilitas lereng sebesar 1.187 yang menunjukkan lereng tersebut dalam kondisi kritis. Dirancanglah desain dinding penahan tanah yang memiliki nilai faktor keamanan guling, faktor keamanan geser, daya dukung tanah masing-masing sebesar 11.37, 2.3, 3.35.

Population growth causes the need for housing to increase, the number of residential houses located on the slopes of the Brantas River, Wringinanom District, Gresik Regency certainly affects the strength of the soil in the area so that it can trigger landslides. To prevent landslides, it is necessary to install retaining walls.

Slope stability analysis is carried out to determine if the slope has the potential to experience landslides. The analysis was carried out using the help of Geoslope software. Design planning of retaining walls must be by the safety factor according to SNI 8460: 2017 including overturning safety factor, shear safety factor, and soil bearing capacity.

From the analysis conducted on the slopes of the Brantas River, Wringinanom District, Gresik Regency, a slope stability value of 1,187 was obtained which indicated that the slope was in critical condition. A retaining wall design is designed which has a safety factor of overturning, sliding safety factor, and soil bearing capacity of 11.37, 2.3, 3.35, respectively.