Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil

Analisis Tingkat Resapan Tanah Berdasarkan Pengukuran Permeabilitas Tanah pada Sub DAS Bendung Palembang

2025-06-08T17:45:01+07:00

The varying characteristics of soil in the Bendung watershed influence water infiltration processes, and soil permeability is an important indicator for assessing the soil's effectiveness in absorbing water. The relationship between permeability and water absorption capacity can help determine the risk level of waterlogging and flooding in the Bendung watershed. The study aims to analyze soil permeability variations in the Bendung watershed and their impact on flooding events. The method used is the Falling Head Test to accurately measure soil permeability at 14 locations, by measuring water height in a pipe inserted into the soil. Permeability values vary, with the highest value of 12.129 cm/hour in locations with sandy soil, while locations with clay content have lower permeability values, at 0.756 cm/hour. There is a connection between soil permeability and waterlogging. Soils with low permeability tend to cause water accumulation, increasing flood risk due to saturated soil. Conversely, high permeability indicates good water absorption capacity, as sandy soils have pores that effectively allow water to pass through. Soils with high sand content have higher permeability values, aiding water absorption in waterlogged areas. Clay soils have lower permeability and tend to cause waterlogging, increasing flood risk due to their saturated properties.

Karakteristik Tanah pada Kawasan Sawah Lebar Baru Kota Bengkulu dan Aplikasinya dalam Perancangan Geoteknik

2025-06-08T17:45:02+07:00

Soil is an essential and indispensable material in civil engineering and building design, affecting various construction works. The primary function of soil is to support the construction load built on it, so the soil must be able to carry the load. Each type of soil has different characteristics, so it requires special handling, both physically and mechanically. This research aims to determine the soil's physical and mechanical properties and its application using the finite element method in the Sawah Lebar Baru area, Bengkulu City. The Sawah Lebar Baru area is currently developing a new residential area. Based on the tests conducted, the soil in the area is classified as silt with high plasticity (MH). The tests include physical tests such as moisture content, volume weight, specific gravity, grain size analysis, and Atterberg limits, as well as mechanical tests such as free compressive strength test, consolidation test, and direct shear test. The results of this study provide information on the type, characteristics, physical and mechanical properties of soil, as well as its application in geotechnical design. The foundation design test results showed that the maximum vertical load was 32,900 kN/m², and the safety factor value was 3.047 for the 0.5 m depth variation. The maximum vertical load value in the foundation with a depth variation of 0.75 m is 67,500 kN/m², and the most significant safety factor value is 5.909. For the depth variation of 1 m, the maximum vertical load value is 118,050 kN/m², and the safe factor value is 9.864.

Kajian Risiko Bencana Alam Pada Tower SUTT 150 kV Bandung Timur – Ujung Berung

2025-06-08T17:45:03+07:00

Infrastructure—such as transportation, telecommunications, sanitation, and energy—forms the backbone of a country’s economic development. Within infrastructure projects, risk management plays a critical role in mitigating potential losses. One such system is the High Voltage Air Duct (SUTT), which distributes electricity from power plants—typically located far from urban centers—to end users. The 150kV East Bandung–Ujung Berung SUTT project involves 26 transmission towers supplying electricity from East Bandung to Ujung Berung. This study aims to identify natural disaster risks that may impact the 150kV SUTT towers in this project. The research was conducted on-site along the East Bandung–Ujung Berung transmission corridor. Using a qualitative approach and the AS/NZS 4360 risk management framework, natural disaster risks were mapped and analyzed. Findings indicate that earthquakes pose the most significant natural disaster risk to the 26 SUTT towers. The highest-ranked risk factor identified is the potential for tower foundations to collapse or shift due to seismic activity, which could lead to severe structural damage. This risk scored 18.32, placing it in the “very high” category. Another major risk is delayed emergency maintenance following a natural disaster, which can result in further deterioration and significantly reduce the towers’ service life. This risk scored 15.05, classified as “high”.

Identifikasi Sebaran Akuifer di Desa Geneng, Kabupaten Ngawi, Provinsi Jawa Timur

2025-06-08T17:45:04+07:00

Ngawi Regency is one of the largest rice-producing regions in East Java. However, this area faces challenges related to water availability due to relatively low rainfall, making adequate groundwater sources essential to support agricultural irrigation systems. Therefore, analyzing subsurface geological characteristics is crucial for mapping the presence and distribution of aquifers as one of the primary sources of irrigation water. This research uses the Vertical Electrical Sounding (VES) method using the Schlumberger configuration to identify water-bearing rock layers. Data acquisition was conducted at six measurement points located in dry areas to minimize potential bias caused by soil moisture or surface water. These six points form a rectangular area, allowing the development of one-dimensional and three-dimensional subsurface models using IP2WIN and RockWorks software, with adjustments based on regional geological conditions. The interpretation results show that the research area consists of clay layers, silt layers, and sand layers which are included in alluvium deposits (Qa), where the sand layer is indicated as an aquifer. The aquifer depth ranges from 5.3 to 75 meters, with thicknesses varying between 7 to 33 meters at each measurement point. This aquifer layer is confined between low-porosity clay and silt layers, indicating that the aquifer is likely to be classified as a confined aquifer.