Application of a New Concept of Cracked Soils in Slope Stability Analysis with Heavy Rain and the Pattern of Cracks as the Governing Factors

Amalia, Dewi; Mochtar, Indrasurya B.; Mochtar, Noor Endah

doi:10.1007/978-3-030-32816-0_42

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Konsep unik yang memandang crack berbeda dengan konsep yang ada sebelumnya (crack tidak hanya dianggap sebagai bidang lemah) ini dipelopori oleh Mochtar (Mochtar & Hutagamissufardal, 2016). Stabilitas lereng yang dianalisa menggunakan metode yang ada selama ini menghasilkan SF > 1 yang berarti aman, tetapi di lapangan lereng longsor (Amalia et al, 2020(Amalia et al, , 2018. Tidak hanya itu, ditemukan beberapa lereng dengan kemiringan cukup landai mengalami longsor pada saat hujan lebat, padahal jika dianalisis SF > 1 (Mochtar & Hutagamissufardal, 2016) (Alexsander et al, 2017(Alexsander et al, , 2018 telah berhasil melakukan validasi terhadap the concept of cracked soil dengan penelitian langsung di lapangan.…”

Section: Pendahuluanunclassified

Pengaruh Biopolimer Pada Stabilitas Lereng Swelling soil

2021

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Many studies have begun to develop the concept of cracked soil. The results of research related to cracked soil are able to answer the irregularities that occur, such as the difference in the results of the stability analysis which is considered safe with the conventional bishop method, while the conditions in the field are landslides. Swelling soil is soil that is susceptible to changes in water content. This type of soil is very prone to cracking. To build infrastructure on the swelling soil type, an improvement must be made, one of which is by mixing the swelling soil with biopolymer. The results of this biopolymer mixing are then modeled in the New Slope Stability Analysis Program (NSSAP) 1.0 which refers to the concept of cracked soil. From the analysis, it was found that the slope safety factor before improvement with biopolymer was 0.305 and the safety factor after improvement with biopolymer was 2.006. From the results of this study, it can be seen that the role of biopolymers in stabilizing swelling soil is quite large, which is around 558%.

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Section: Pendahuluanunclassified

Pengaruh Biopolimer Pada Stabilitas Lereng Swelling soil

2021

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“…Second, water can fill voids in soil cracks and provide an additional driving force to the ground. And finally, cracks in the soil become a critical part that reduces the shear stress of the soil [3] [4]. Therefore, it is important to prevent cracks due to the drying of the soil.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer as Environmentally Friendly Reinforcement to Overcome Cracked Soil Problems on Expansive Soil:

Guritno¹,

Amalia²,

Karnisah³

et al. 2021

Proceedings of the 2nd International Seminar of Science and Applied Technology (ISSAT 2021)

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The distribution of soft and expansive soil that is often found in Indonesia often causes problems in the structure above it. To build the infrastructure on expansive soil, it is necessary to improve the subgrade. One method to improve soil is to stabilize it by using biopolymers. Biopolymer was chosen because it is more environmentally friendly than the use of cement as soil stabilization. In this study, Xanthan Gum (XG) biopolymer was used, with concentrations of 1%, 2%, and 4%. Testing was carried out experimentally in the form of testing physical and mechanical properties as well as cyclic drying testing. From the results of the analysis, the XG biopolymer can reduce the number and width of cracks after experiencing a drastic reduction in water content. A positive impact was also obtained on the mechanical analysis with the addition of biopolymers that could increase the compressive strength of the soil up to 432% and the shear strength of the soil up to 482%.

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