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All Journal Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Jurnal Teknik Sipil
Martini, RA Sri
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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PENGARUH KECEPATAN ALIRAN SUNGAI TERHADAP EROSI TANAH PADA LERENG DI BELOKAN SUNGAI ENIM DESA KARANG RAJA KABUPATEN MUARA ENIM Martini, RA Sri; A Rivai, Masri
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 5, No 4 (2018): Vol. 5 No. 4 Desember 2018
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.1678201854

Abstract

Salah satu persoalan yang paling sering terjadi di lereng sungai adalah terjadinya perubahan morfologi akibat dari erosi tanah di lereng sungai. Erosi yang terjadi pada sungai dapat memberikan dampak buruk bagi keamanan lahan, pemukiman maupun infrastruktur yang berada bantaran sungai yang mengalami erosi. Dampak dari erosi ini harus diwaspadai karena dapat menyebabkan kerusakan di lereng sungai. Oleh karena itu diperlukan penelitian tentang erosi tanah pada lereng di Daerah Aliran Sungai (DAS) agar dapat diketahui penyebab terjadinya erosi tanah di lereng sungai.Lokasi penelitian ini adalah pada lereng di belokan sungai Enim yang mengalami erosi yang terletak di desa Karang Raja kabupaten Muara Enim provinsi Sumatera Selatan.Berdasarkan dari perhitungan waktu kecepatan aliran sungai dengan menggunakan metode apung yang dilakukan sebanyak 25 kali dengan jarak 25 meter dari titik A ke titik B, kecepatan aliran rata-rata pada lokasi yang mengalami erosi adalah 1,18483 m/detik. Perbandingan antara perhitungan menggunakan rumus manning dan hasil pengamatan di lapangan dengan kecepatan pada tabel harga kecepatan kompeten maka hasil yang dapat memenuhi syarat V lapangan dan V perhitungan Vc = 1,13739 dan 1,18483 > 0,6 untuk kecepatan terendah dengan harga rata-rata V lapangan dan V perhitungan yang berada pada interval 1,0 - 2,0 m/detik. Pada perhitungan stabilitas lereng dengan menggunakan metode fellenius (1927) hasil yang didapatkan adalah 0,7545 yang artinya hasil yang didapatkan lebih kecil dari faktor keamanan yaitu 1,5 dan berarti bahwa lereng dinyatakan tidak aman atau tidak stabil.
PREDIKSI KEBUTUHAN AIR BERSIH PDAM TIRTA MUSI PALEMBANG (STUDI KASUS WTP BORANG) Martini, RA Sri; Agusri, Erny; Setiawati, Mira
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 8, No 1 (2023): : BEARING:Jurnal Penelitian dan Kajian Teknik Sipil
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.v8i1.6261

Abstract

PDAM Tirta Musi Palembang is a government-owned enterprise engaged in water treatment services,where water that is not dirty is processed and converted into clean water that is ready and suitable forhuman consumption. The increase in annual population has an impact on the increasing growth in thenumber of customers who need clean water. However, the Water Treatment Plant (WTP) or WaterTreatment Plant (IPA) still does not provide full services to all city environments, one of which is at thePalembang City Form WTP. The source of WTP processing comes from the Borang River and intake 1 ilir.The customer population is projected to increase to 22,434 in 2023 based on Geometric analysis with acalculation of customer needs of 218.04 liters/second. The pump used at WTP Borang has a capacity of200 liters / second and uses 2 pumps, so WTP Borang can still meet customer needs. The amount of waterdischarge required during maximum days and peak hours is 239.84 liters / second and 327.06 liters /second respectively. With this situation, it is predicted that the community's clean water needs in 2023 canbe fulfilled by WTP Borang.
PENGARUH PASANG SURUT DISALURAN PADA KAWASAN PERSAWAHAN Martini, RA Sri; Revisda, Revisda; Kharisma, Riri
Jurnal Teknik Sipil Vol 13 No 2 (2023): Jurnal Teknik Sipil
Publisher : Civil Engineering Study Program Faculty of Engineering, University of Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36546/tekniksipil.v13i2.1090

Abstract

Tides are a natural phenomenon of periodic rise and fall of water levels caused by gravitational forces and the force of attraction. This can naturally increase water levels and floods which are usually called tidal floods.To overcome this, drainage was created to reduce overflow at high tide and add water at low tide.The Lalan Sub-Watershed, Lalan District, Musi Banyuasin Regency is one of the sub-watersheds of the Musi Watershed which is influenced by tides. The average height of secondary channels in the Lalan sub-basin is 1.15 m with an average flow discharge of 528.96 m3/sec. The highest tidal water level is 1.21 m with a flow discharge of 978.79 m3/s while the lowest low tide water level is 0.33 m with a flow discharge of 234.95 m3/s. This causes water to overflow at the highest tide, thereby submerging the rice fields that are irrigated by the sub-basin and experiencing drought at low tide. To overcome this, a sluice gate is needed in the secondary channel to regulate the entry and exit of water.
PENGARUH PENAMBAHAN KAPUR TERHADAP KUAT TEKAN BEBAS PADA TANAH LEMPUNG Martini, RA Sri; Oemiati, Nurnilam; Agusri, Erny; Yendi, Yendi
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 9, No 2 (2024): Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.v9i2.9059

Abstract

Clay soil subgrades have high pore water characteristics, which is a unique problem for civil structures such as buildings and road pavements. Lime contains compounds such as the element Calcium Oxide (CaO) of 79.43%. In reaction with clay minerals or other minerals, lime forms a strong calcium silicate gel that binds to soil particles. Different types of lime mixtures used are 0%, 12%, 15%, and 18% to soil weight with 28 days of soaking for four (4) days. From the two tests that have been carried out, namely soil compaction (Standard Proctor) and UCS (Unconfined Compression Streght) Soaked and Unsoaked, the optimum values obtained in soil compaction (Standard Proctor) and UCS (Unconfined Compression Streght) Soaked and Unsoaked are in the variation of soil addition + 18%. In the soil compaction test (Standard Proctor), the dry volume weight was 1.744 gr/cm3 and the optimum moisture content value was 16.03% and in UCS (Unconfined Compression Streght) Soaked the largest Qu value was 1.116 kg/cm2, and UCS (Unconfined Compression Streght) Unsoaked the largest Qu value was 2.714 kg/cm2.
Co-Authors A Rivai, Masri Agusri, Erny Kharisma, Riri Mira Setiawati Oemiati, nurnilam Revisda, Revisda Yendi, Yendi