J-CENTAL

PERBANDINGAN PENGARUH PRODUKTIVITAS ALAT BERAT PADA PEKERJAAN TIMBUNAN

Dinda Fardila — 2024-02-29

Pembangunan sebuah konstruksi pastilah menggunakan alat berat untuk membantu proses pengerjaannya. Pemilihan alat berat tersebut perlu di lakukan beberapa pertimbangan suapaya alat berat dapat bekerja sesuai dengan fungsinya dan pekerjaan dapat berjalan dengan lancar. Tujuan di lakukannya penelitian ini adalah supaya dapat mengetahui tingkat penurunan atau peningkatan produktivitas alat berat pada bulan puasa. Dalam penelitian ini ada 2 rumusan masalah, yaitu besar produktivitas alat berat pada bulan puasa dan faktor-faktor yang mempengaruhi produktivitas. Untuk menjawab rumusan masalah tersebut dapat menggunakan dua metode yaitu, untuk rumusan masalah pertama menggunakan metode produktivitas dan untuk rumusan masalah kedua menggunakan metode observasi berdasarkan hasil pengamatan di lapangan. Hasil dari rumusan masalah pertama yaitu di dapatkan hasil produktivitas alat berat pada zona 1 yaitu, excavator sebesar 39,77 m³/jam, dump truck sebesar 11,36 m³/jam, dan bulldozer sebesar 60,06 m³/jam. Produktivitas alat berat pada zona 2 yaitu, excavator sebesar 50,42 m³/jam dan dump truck sebesar 14,07 m³/jam. Produktivitas alat berat pada zona 3 yaitu, excavator sebesar 47,33 m³/jam dan dump truck sebesar 19,61 m³/jam. Setelah di lakukan perbandingan antara hasil produktivitas pada bulan puasa dengan hasil produktivitas di luar bulan puasa, maka di dapatkan hasil bahwa, untuk alat berat excavator pada zona 1 di katakan tidak produktif dan pada zona 2 dan zona 3 di katakan produktif, untuk alat berat dump truck, pada zona 1 di katakan tidak produktif dan pada zona 2 dan 3 di katakan produktif dan untuk alat berat bulldozer pada zona 1 di katakan tidak produktif. Faktor-faktor yang mempengaruhi produktivitas yaitu cuaca, jumlah alat yang berlebihan, kapasitas produksi dan waktu siklus alat.

ANALISIS EROSI PERMUKAAN MENGGUNAKAN METODE RUSLE DAN USLE DI DAS TALLO

Al Akbar — 2024-02-29

Daerah Aliran Sungai (DAS) Tallo adalah DAS yang secara administratif terletak ditengah kota besar, Makassar. Potensi Erosi di DAS ini cukup besar karena posisi dan letaknya yang lebih rendah dari permukaan dan alih fungsi lahan yang terus meningkat. Tujuan dari penelitian ini untuk mengetahui berapa besar analisis erosi curah hujan area yang ada di DAS Tallo dan untuk mengetahui berapa besar erosi permukaan yang terjadi di DAS Tallo menggunkan Metode Rusle dan Usle. Metode yang digunakan yaitu metode deskriptif kuantitatif dengan pendekatan analisis data sekunder. Analisis ini merupakan metode yang menggunkan data sekunder sebagai sumber data primer. Dari hasil perhitungan diketahui nilai curah hujan area sebesar 23.07 mm dan tingkat bahaya erosi menggunakan metode rusle sebesar 181096.31 ton/ha/tahun sedangkan metode usle sebesar 636.97 ton/ha/tahun.

Kata Kunci : DAS, Erosi, RUSLE, USLE

EVALUASI SISTEM DRAINASE DI KAWASAN PEMUKIMAN PENDUDUK WILAYAH KAMPUNG IRIAN KELURAHAN SEKETENG KABUPATEN SUMBAWA

Adinda Srivangga — 2024-02-29

Jalan Tongkol area, Seketeng District, Sumbawa Regency, NTB. This is a road frequently used by residents. The drainage channel on Jalan Tongkol, Seketeng District, is unable to withstand the flow of air during heavy rain. This writing aims to analyze the feasibility of existing channel dimensions and identify the causes of the current accumulation of air conditions. This study was carried out by carrying out hydrological and hydraulic analysis. Hydrological analysis includes rainfall data, rain intensity using the Mononobe formula and flood discharge using the Rational formula. Next, calculate the flood discharge by expanding the Catchment Area area, the flow coefficient value and the rain intensity during the concentration time using the equation Tc=Td+To. The rainfall value used to calculate rainfall intensity is the average maximum daily rainfall value from 2011 to 2020 at the BBMKG Station in the Sultan Kaharuddin area, Sumbawa Besar.

PERENCANAAN SISTEM JARINGAN DRAINASE DI DESA KARANG DIMA KECAMATAN LABUAN BADAS KABUPATEN SUMBAWA BESAR

Kasmir Ym. Timumun — 2024-02-29

Structurally, the drainage in Buin Pandan Hamlet is generally masonry in cement, but due to poor planning, the water flowing on the road and also the planned drainage channel is not in accordance with the water discharge so that water overflows from the drainage channel, which is in Dusun Buin. Pandan, aims to determine whether the current condition of the drainage system is appropriate. After the research has been done, it is known that the value of Cv = 0.485, the value of C_s = 0.026 and C_k = 3.973, it can be concluded that in planning this drainage system the type III log method is used and the rainfall intensity is 0.229 mm/hour in Buin Pandan Hamlet. Then a calculation is carried out with the aim of knowing whether Qr < Qs or Qr > Qs in the drainage in Buin Pandan Hamlet and it is known that the difference between Qr = 5.46 (m^3/s) and Qs = 0.60 (m^3/s) is in the drainage. With steps that can be taken to prevent flooding, namely by re-planning the drainage channel. From the results of the re-planning of the drainage channel, the value of the channel capacity Qs is 5.86 (m^3/s) and the size of the channel that can accommodate water discharge is 1 m wide and 1.60 m high. Channels planned for the same channel, namely open rectangular channels, only have different dimensions.

ANALISIS TINGKAT KERUSAKAN PANTAI AKIBAT BENCANA ABRASI DAN UPAYA PENANGANANNYA (PESISIR DESA STOWE BRANG)

Handika Minarno — 2024-02-29

Abrasion that occurs in Sumbawa Regency, Utan District, Stowe Brang Village is caused by wave factors, land characteristics which are generally in the form of peat, silt and sand are very vulnerable to erosion due to waves. In addition to natural factors, abrasion can also be blamed on human factors. The variables used in this study consist of 2 of them, namely: (1) Natural Factors, (2) Human Factors. The purpose of this study is to describe the coastal condition of Stowe Brang Village, Utan District, Sumbawa Regency. The analysis method used is Descriptive Analysis with a combination of Quantitative and Qualitative. To assess the condition of damage to coastal areas, it is necessary to survey the location of mangrove vegetation conditions, how far the coastline is to the pond, and the condition of the river estuary at the site. Furthermore, based on the value of the coastal damage index, the prioritization of handling refers to SE PU No. 11 of 2021. Based on the results of the analysis, there are several factors that affect the occurrence of abrasion at the study site, including factors still lack of vegetation on the beach, flat land slope factors, sandy beach type factors and the absence of coral reefs, sea wave factors that are large enough. To get wave plan data requires wind data for 10 years, tidal data, topographic data and bathymetry. Based on the results of data analysis, the wave height of the 10-year plan with the Gumbel method is 0.4 m. The form of handling efforts that can be done is the addition of mangrove vegetation and can also be done by building coastal protection constructions such as breakwater construction with plain concrete blocks

ANALISIS KARAKTERISTIK DAN KEBUTUHAN RUANG PARKIR SMAN 1 SUMBAWA BESAR

Abdurahman Ishak — 2024-02-29

State High School 1 Sumbawa Besar is one of the schools located in Sumbawa Besar, NTB which has the problem of limited parking spaces that do not adequately accommodate two-wheeled and four-wheeled vehicles so that researchers analyze the characteristics and needs of parking spaces with the aim of obtaining the results of calculating the characteristics and needs of parking spaces. The method used is the Technical Guidelines for the Provision of Parking Space Facilities, Transportation Department 2012. Based on the research conducted, the results of the available parking space capacity at SMA N 1 Sumbawa Besar are only 114 plots of two-wheeled vehicles, while the results of the volume of analysis of parked vehicles require 122 SRP, so the researcher offers a solution in the form of parking space design of 122 SRP for two-wheeled vehicles and 6 SRP for four-wheeled vehicles that do not have parking plots.