5th CE REFORM

Studi pengaruh kemiringan sudut terhadap angka keamanan lereng dengan perkuatan geotekstil

2023-08-08T06:41:29Z

Studi pengaruh kemiringan sudut terhadap angka keamanan lereng dengan perkuatan geotekstil Irfan, M; Chrismaningwang, Galuh; Ardhana, Pria A slope is an inclined land surface from a higher point to a lower point. Slopes are usually formed due to excavation for construction or naturally formed due to landslides. Slope reinforcement is a way to ensure stability and safety against landslides. One of the commonly used reinforcement methods is the use of geotextiles. The advantages of using geotextiles for reinforcement are ease of implementation, cost-effectiveness, and the ability to enhance slope stability actively. The stability analysis of slopes is conducted to assess whether a slope is stable and safe from landslides. Slope stability analysis can be performed using empirical or numerical calculations. Numerical analysis is conducted using the GeoStudio program. This research studies the influence of slope angles on the safety factor. The analysis is performed using five different methods: the Ordinary Method, the Bishop Method, the Janbu Method, the Morgenstern-Price Method, and the Spencer Method in the GeoStudio software. Based on the results obtained from three slope angle variations (60°, 65°, and 75°) under a factory's live load and using the five methods in the GeoStudio program, the slopes are classified as unsafe with SF <1.5. After planning reinforcement with Hibritex Geotextile LP75/75 and applying it to the slopes with the three angle variations, the resulting safety factors are classified as stable and safe with a safety factor >1.5.

Analisis numeris pengaruh muka air tanah dan perkuatan geotekstil terhadap stabilitas struktur dermaga

2023-08-08T06:39:07Z

Analisis numeris pengaruh muka air tanah dan perkuatan geotekstil terhadap stabilitas struktur dermaga Hanif, Muhammad W; Chrismaningwang, Galuh; Dananjaya, Raden H The internal influences of slope instability, such as increased pore water within the slope, water flow characteristics, and soil shear strength, pose significant challenges in slope stability analysis research. In addition to these factors, the groundwater level also impacts slope stability. The influence of varying groundwater levels will be examined in this study to determine the extent of its effect on slope stability and the corresponding safety factors. With the advancement of technology, slope stability analysis can be conducted using applications as assisting tools, commonly known as numerical methods in slope stability analysis. Geostudio is one software specifically designed for accurate slope stability analysis. The analysis process involves utilizing five methods available in Geostudio, namely the Morgenstern-Price, Spencer, Bishop, Janbu, and Ordinary methods. In this study, Geotextiles are chosen as the slope reinforcement method. The parameters include soil unit weight, internal friction angle, cohesion, Poisson's ratio, and soil elasticity modulus. Based on the analysis results using the methods mentioned earlier, for both unreinforced and reinforced slope conditions and variations in groundwater levels, the most significant safety factor (SF) obtained for the unreinforced slope is 0.269 using the Morgenstern-Price method. At the same time, the highest SF value of 2.503 is achieved for the reinforced slope using the Bishop method. The significant increase in the safety factor, approximately tenfold, as a result of geotextile reinforcement proves its effectiveness in slope stabilization.

Analisis pengaruh kepadatan tanah subgrade dan perkuatan geotekstil terhadap nilai safety factor lereng

2023-08-08T06:36:47Z

Analisis pengaruh kepadatan tanah subgrade dan perkuatan geotekstil terhadap nilai safety factor lereng Rohman, Minannur; Chrismaningwang, Galuh; Setiawan, Bambang One of the issues in constructing a structure is the presence of soft subgrade soil. The purpose of this study is to examine the impact of subgrade soil density on slope stability through geotextile reinforcement. The variations of subgrade soil in this research include a 1 m replacement using fill soil, a 2 m replacement using fill soil, a 1 m replacement using fill soil and 1 m using limestone, a 1 m replacement using substitute subgrade soil, a 2 m replacement using substitute subgrade soil, and a 1 m replacement using substitute subgrade soil and 1 m using limestone. The slope stability analysis was conducted using the SLOPE/W program in GeoStudio. The analysis results indicate that the slopes without reinforcement and with variations in subgrade soil density do not yield safe safety factor values. As the subgrade soil becomes weaker, the safety factor decreases. The variation of 1 m replacement using substitute subgrade soil and 1 m using limestone with reinforcement produces the highest safety factor value, which is 1,84.

Studi pengaruh variasi jumlah dan tinggi benching terhadap stabilitas lereng dengan perkuatan geotekstil menggunakan geostudio

2023-08-08T06:34:25Z

Studi pengaruh variasi jumlah dan tinggi benching terhadap stabilitas lereng dengan perkuatan geotekstil menggunakan geostudio Bagaskara, Imam Z; Chrismaningwang, Galuh; Dananjaya, Raden H Failure of slope constructions might cause substantial consequences for the environment and the surrounding communities. Therefore, accurate analysis is required to identify factors that affect slope stability. Terracing is suitable for hilly areas with limited access, while geotextiles function to reinforce soil and reduce the risk of slope failure. Geotextiles have advantages in terms of workability and economic aspects. The aim of this study is to analyze the influence of terracing variations and the use of geotextiles on slope stability, as well as to compare the results of slope geometry design analysis using numerical calculations with the GeoStudio program. The research result shows that the increase in the safety factor (SF) due to the addition in the number of terraces from 2 terraces to 3 is 13.95%; from 3 terraces to 4 is 11.26%; from 4 terraces to 5 is 10.12%. The increase in SF value due to the use of geotextiles on a slope with 2, 3, 4, and 5 terraces are 77.29%, 56.12%, 41.37%, and 32.17%, respectively. The increase in SF value due to the addition in the number of terraces and the use of geotextiles from 2 terraces to 3 is 0.34%; from 3 terraces to 4 is 0.74%; and from 4 terraces to 5 is 2.95%