Inersia: Jurnal Teknik Sipil

ANALISIS EFEKTIVITAS PEKERJAAN PENANGANAN JALAN LONG SEGMENT DI JALAN KAPTEN BUKHARI GUNUNG MESIR (DAK) KABUPATEN BENGKULU SELATAN

Teddy Setiawan Setiawan — 2025-04-28

South Bengkulu Regency is rich in economic potential in the agriculture, plantation, fisheries, and tourism sectors. Adequate roads are key to optimizing this potential. Recognizing this, the South Bengkulu Regency Government has initiated a project to handle long segments on Jl. Kapten Bukhari Gunung Mesir, funded by the Special Allocation Fund (DAK). This report examines the conformity of project planning with the results achieved, as well as the conformity of the implementation schedule with the time required. This evaluation includes a comparison of the results of the work with the initial Budget and Cost Plan (RAB) and a comparison of the implementation time with the original plan.

The evaluation results show that the project is in line with the initial plan, both in terms of the volume of work and the completion time. This has resulted in a significant improvement in road quality. Technical constraints such as bad weather and limited material availability were overcome with effective solutions. The project has generated significant economic and social benefits for the community, such as improved accessibility, time efficiency, and increased safety. Recommendations for future projects include improved coordination, more flexible schedule adjustments, better public awareness, regular monitoring and evaluation, capacity building, and more optimal risk management.

Keywords: Road Infrastructure, Road Rehabilitation, Road Reconstruction, Budget and Cost Plan, S-Curve (Time Schedule)

PENGARUH PENGGUNAAN FLY ASH PADA KUAT TEKAN BETON GEOPOLIMER DENGAN AKTIVATOR NATRIUM HIDROKSIDA (NaOH) DAN NATRIUM SILIKAT (Na2SiO3)

Sindy Kurniawati — 2025-04-28

The study aims to find out the impact of the use of fly ash on the compressive strength of geopolymer concrete when compared to normal concrete as well as to know the optimum strength of geopolymer concrete with specified variation of activator mixture. This study uses experimental method by mixing concrete with previous research as references. The specimens used a cylinder mold with a diameter of 10 cm and a height of 20 cm with a specimens age of 7, 14, and 28 days. The total specimens is 36 with the NaOH concentration used was 14 M. The comparative ratio of NaOH and Na2SiO3 for variation I is 1,0 : 0,5, variation II 1,0 : 1,0, variation III 1,0 : 1,5. Geopolymer concrete replaces 100% of the amount of cement in normal concrete with fly ash. Compressive strength value of geopolymer concrete for variation I : 4,883 MPa, variation II : 7,856 MPa and variation III : 10,403MPa and compressive strength value of normal concrete is, 36,943MPa. The compressive strength of geopolymer concrete when compared with compressive strength of normal concrete in this study decreased with 67,28% for 7 days, 72,22% for 14 days, and 71,84% for 28 days. The optimum compressive strength of geopolymer concrete from variation of the activator mixture specified is at variation III with compressive strength of 10,403 MPa

Keywords: Geopolymer Mortar, Fly ash, Compressive Strength

Analisis Kapasitas Saluran Parit 2 Desa Riak Siabun 1 Kabupaten Seluma Provinsi Bengkulu

Dwi Jenita Maharani — 2025-04-28

This research aim to knowing about the problems of flooding and standing water on Parit 2 channel in Riak Siabun 1, Seluma regency that occur continuously every rainy season. This indicates that water volume which come into channel exceed the normal capacity of channel. Calculation of discharge with the rational methods use 3 primary factors, they are maximum rainfall intensity, wide of area and run off coefficient. The method of analysis used in this study include hydrologic analysis using Gumbel Distribution method which calculates the discharge capacity of the channel and hydraulic analysis to channel normalization. The result of the calculation shows that the channel capacity (Qs) in Parit 2 is 1.95 m3/sec with the upper width 0f 3,9 m; width of 2,74 m and wet cross section 0,744 m smaller than compared to flood peak discharge (QP) of 2,525 m3/sec. It is necessary to normalize the channel by reviewing the channel with a upper width of 4,5 m; width of 3 m and wet coress section 1 m so as to obtain channel discharge of 4,63 m3/sec, then the planning channel can be received.

Keywords: flood, debit, intensity, channel normalization

ANALISIS DAMPAK LALU LINTAS OPERASIONAL KLINIK KECANTIKAN TERHADAP KINERJA RUAS JALAN TERDAMPAK

Anasya Musdalifah Syarifuddin Syarifuddin — 2025-04-28

Traffic impact analysis is an important activity for the continuity of smooth traffic circulation with the presence of new activity centers that generate new flows. This study focuses on analyzing the impact of beauty clinic operations in South Jakarta on several road sections that are considered to have an impact. There are four road sections that are analyzed. Traffic performance analysis in this study uses the PKJI 2023 method to determine the capacity of the road section and continues to determine the level of road service according to the Minister of Transportation's PM number 96 of 2015. After analyzing traffic performance based on the results of the traffic census, the existing conditions in 2024 were found to have road sections at levels B and C. To determine future traffic predictions, a further analysis was also carried out, namely the calculation of predicted services after 5 years of clinic operations with existing traffic growth conditions. The results of the analysis show that the level of road service has decreased to level F in the next 5 years. From the results of the analysis, the recommendations given are in the form of planning for the construction of flyovers and the development of public transportation network services that can be accessed by consumers of the beauty clinic.

Keywords: analysis of traffic, PKJI 2023, road performance, forescasting

EVALUASI PENERAPAN TEKNIK CRASHING DALAM MANAJEMEN WAKTU PEMBANGUNAN RUMAH SUBSIDI DENGAN METODE CPM DAN PERT (STUDI KASUS RUMAH PONDOK ALAM DESA SIGARA-GARA)

Nela permata sari Lubis — 2025-04-28

Penjadwalan proyek merupakan elemen utama dalam perencanaan konstruksi yang bertujuan untuk menentukan waktu pelaksanaan proyek berdasarkan urutan aktivitas dari awal hingga selesai secara tepat waktu. Penelitian ini menggunakan metode Critical Path Method (CPM) dan Project Evaluation and Review Technique (PERT) untuk mengatasi tantangan penjadwalan dalam proyek konstruksi rumah. Tujuan utama dari penelitian ini adalah untuk mengidentifikasi jalur kritis dalam proyek serta mengevaluasi durasi proyek, dengan menggunakan pendekatan CPM dan teknik crashing untuk mempercepat penyelesaian kegiatan yang ada di jalur kritis. Data primer yang digunakan mencakup kurva S, bar chart, serta data langsung dari pihak pelaksana proyek perumahan Pondok Alam Sigara-Gara. Hasil penelitian menunjukkan bahwa terdapat dua jalur kritis dalam proyek ini, yaitu jalur A - E - F - G - M - N - P - Q dan jalur B - C - D - I. Dengan metode CPM, durasi proyek yang awalnya 30 hari dapat dikurangi menjadi 25 hari. Penerapan PERT dengan crashing menunjukkan hasil yang bervariasi: percepatan 1 hari menghasilkan durasi 22 hari dengan tambahan biaya Rp11.280.000, percepatan 2 hari menghasilkan durasi 21 hari dengan tambahan biaya Rp14.100.000, dan percepatan 3 hari menghasilkan durasi 22 hari dengan tambahan biaya Rp12.690.000. Hasil analisis menunjukkan bahwa penambahan tenaga kerja lebih efektif daripada lembur dalam hal efisiensi biaya dan durasi proyek.