Pengaruh Cracked Soil terhadap Stabilitas Lereng Desa Bojongkondang–Kabupaten Sumedang dengan Menggunakan Software Geostudio

Dewi Amalia, Ratu Salma Nisrina, Yackob Astor, Antonius Siswanto, Nursyafril Nursyafril, Iman Ruchyat, Apip Pudin

Abstract


Abstrak

 

Tanggal 9 Januari 2021, terlah terjadi bencana alam tanah longsor terjadi di Dusun BojongKondang, Desa Cihanjuang, Kec. Cimanggung, Kab. Sumedang. Keberadaanya masyarakat di zona merah sangat berbahaya. Ditambah dengan kondisi lereng yang relative curam sehingga perlu dilakukan studi terhadap stabiltas lereng untuk mengetahui faktor keamanan (SF) dari lereng tersebut. Pemukiman disekitar lokasi bencana alam tanah longsor dapat dikatakan aman jika nilai factor keamanan (safety factor) lerengnya >1,5. Dilakukan analisis terhadap pemodelan keretakan tanah untuk mendapatkan faktor keamanan terkritis di mana tanah dimodelkan sebagai tanah pasir (behaving like sand). Hal ini dapat diselesaikan dengan mengaplikasikan The Concept of Cracked Soil. Penelitian mengenai keretakan tanah baru dilakukan 10 tahun terakhir. Selanjutnya dilakukan penelitian dengan melakukan kajian lapangan untuk menemukan posisi retakan di lereng, dan pada tahun 2020 dilakukan pemodelan analisis numeric untuk stabilitas lereng dalam kondisi retak.

 

Kata kunci: Stabilitas Lereng, Tanah Longsor, Behaving Like Sand

 

 

 

Abstract

 

On January 9 2021, a landslide occurred in BojongKondang Hamlet, Cihanjuang Village, Cimanggung District, Sumedang Regency. The existence of people in the red zone is very dangerous. coupled with the relatively steep slope conditions. Based on these conditions, it is necessary to carry out a slope stability analysis study to find out what the safety figure (SF) of the slope is. Settlements close to landslide disaster locations can be said to be safe if the slope safety factor is >1.5. In the analysis, modeling of soil cracks was also carried out to obtain the value of the critical safety factor by modeling the soil as behaving like sand. This problem can be solved by applying The Concept of Cracked Soil. Research related to crack soil has only been carried out in the last 10 years. The next research was a field study to find the position of cracks on the slope, and finally in 2020 numerical analysis modeling was carried out regarding slope stability in cracked conditions.

 

Keywords: Landslides, Slope Stability, Behaving Like Sand


Keywords


Longsor, Stabilitas Lereng, Behaving Like Sand

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References


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DOI: https://doi.org/10.29103/tj.v14i1.1023

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