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Tri M.W. Sir
Universitas Nusa Cendana
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Engineering Materials Science & Nanotechnology Transportation

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Perencanaan Embung Wae Lerong untuk Pemenuhan Kebutuhan Air Irigasi di Daerah Irigasi Wae Lerong Ruteng Provinsi NTT Denik Sri Krisnayanti; Elsy E. Hangge; Tri M.W. Sir; Eugenius Nino Mbauth; Alvine C. Damayanti
Jurnal Irigasi Vol 15, No 1 (2020): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31028/ji.v15.i1.15-30

Abstract

Wae Lerong Small dam is located in Ruteng City, Manggarai District which has a catchment area of 0,606 km2 and the annual rainfall ranges from 2,500-3,000 mm/year. But in some locations still having water shortages, so it needs rainwater harvesting to get increase agricultural potential during the dry season. This study aims to design the Wae Lerong Small dam as a rainwater reservoir during the rainy season and used in utilization to fulfill the needs of irrigation water. The method used is a quantitative method with empirical data analysis. The rainfall analysis used the Log Pearson III method and flood discharge analysis using the rational method. Evapotranspiration calculations using the Penman Modification method and the dependable discharge analysis using the F.J. Mock method. The analysis of slope stability using the Limit Equilibrium Method aided by the GeoStudio Slope / W 2007 Program. The results showed that the average monthly rainfall ranged from 28.87 - 511.99 mm/month. The rainfall for 50-year return period of 249.28 mm, and flood discharge for 50-year return period of 12.094 m3/s. The design of Wae Lerong dam is height of 13.5 m, a width of 5 m, length of 81.50 m, the upstream slope of 1:3, and downstream slope 1:2.25. For the stability of the reservoir body safety value > 1.10 so it is still in a safe condition. Wae Lerong Small dam storage capacity is 86,540.96 m3 with an inundation surface area of 19,855.69 m2 at a normal water level of 1,204.00 m.  The value of dependable flow is 0.001 - 0.793 m3 /s and the water requirements for planting pattern I (Paddy-Paddy-Palawija) increase up to 0.176 m3/s. The water balance values deficit in May - September which ranged from 0.017 to 0.13 m3/s.
Analisis Perbandingan Kinerja Seismik dari Struktur Gedung dengan Pelat Konvensional, Waffle Slab, dan Flat Slab Yohanes Alexander Rupidara; Remigildus Cornelis; Tri M.W. Sir
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 2 No 1 (2022): Volume 2 Nomor 1 Mei 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.601 KB) | DOI: 10.35508/forteks.v2i1.5496

Abstract

Indonesia is a country with high earthquake risk because it is located in the path of the most active earthquake in the world. It makes Indonesia situated in a region with a high earthquake intensity. The study aimed to determine the seismic performance levels of building structures with conventional slabs, waffle slabs, and flat slabs with the time history analysis method. There are three models of structures studied, namely building structures with conventional plates, building structures with waffle slabs, and building structures with flat slabs, with a 5-story structure system, where the longest and shortest span has the same size of 20 m and the height of each level 4 m. This study showed the largest displacement was 235.82 mm in building structures with waffle slabs and the smallest displacement was 146.49 mm in building structures with flat slabs. The largest drift is 0.012 on a building structure with a waffle slab, and the smallest drift is 0.007 on a building structure with a flat slab. The level of seismic performance produced from all three types of structures varies from immediate occupancy (IO) to damage control (DC).
Pengaruh Karakteristik Tanah Dasar Terhadap Tingkat Kerusakan Jalan (Studi Kasus Ruas Jalan Naioni Kecamatan Alak Kota Kupang) Jeanne Elvira Da Costa Soares; Tri M.W. Sir; Elsy E. Hangge
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 3 No 1 (2023): Volume 3 No.1 Mei 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/forteks.v3i1.10545

Abstract

Ruas jalan Naioni merupakan ruas jalan yang mempunyai tingkat kerusakan jalan yang bervariasi mulai dari kerusakan ringan, sedang, sampai berat. Kerusakan-kerusakan ini dapat diakibatkan oleh sifat dari tanah dasar. Penelitian ini dilakukan dengan tujuan untuk mengetahui sifat-sifat fisik dan mekanis tanah dasar serta pengaruhnya terhadap tingkat kerusakan jalan. Metode pengujian yang digunakan yaitu metode observasi melalui pengujian sifat fisik dan mekanis. Hasil penelitian menunjukkan tanah untuk semua tingkat kerusakan jalan termasuk kelompok CH. Tanah untuk semua tingkat kerusakan jalan termasuk kelompok A-7-6 , yaitu tanah lempung yang dikategorikan buruk sebagai bahan untuk tanah dasar. Dari hasil penelitian, tingkat kerusakan jalan berbanding lurus dengan meningkatnya nilai indeks plastisitas, batas cair, batas plastis, kadar air optimum dan nilai pengembangan tanah. Sebaliknya, berbanding terbalik dengan penurunan nilai batas susut, berat volume kering maksimum dan CBR. Hasil pengujian CBR di laboratorium menunjukkan nilai CBR terendam untuk semua tingkat kerusakan jalan tidak memenuhi syarat nilai CBR terendam (>3%), dengan nilai CBR terendah pada kerusakan berat, sebesar 1,22%. CBR tak terendam untuk semua tingkat kerusakan jalan tidak memenuhi syarat nilai CBR tak terendam (>6%), dengan nilai CBR terendah pada kerusakan berat, sebesar 2,12%. Nilai pengembangan tanah terbesar terjadi pada kondisi jalan rusak berat yaitu sebesar 4,08%.
Co-Authors Alvine C. Damayanti Denik Sri Krisnayanti Eugenius Nino Mbauth Hangge, Elsy E. Jeanne Elvira Da Costa Soares Remigildus Cornelis Yohanes Alexander Rupidara