Model Test Details Design Semarang Sea Dike

  • Suprapto S
  • Ginting J
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Abstract

ABSTRAK Pelaksanaan model test detail desain tanggul laut Semarang dilakukan untuk mengetahui tingkat stabilitas struktur tanggul laut berupa armor blok beton berbentuk kubus dengan sisi 1 m. Selain itu, model test juga dilakukan untuk mengevaluasi elevasi puncak tanggul laut terhadap berbagai kondisi gelombang dan kenaikan elevasi muka air akibat penurunan tanah (land subsidence). Tanggul laut Semarang didesain untuk menahan gelombang dan air pasang, serta sebagai jalan tol, sehingga model test dilakukan untuk menguji stabilitas lapis lindung dan limpasan. Terdapat 5 skenario pengujian yang dilakukan yaitu LS01, LS05, LS10, LS15 dan LS15-120% dimana masing-masing skenario menunjukkan kondisi land subsidence yang terjadi setelah 1 tahun, 5 tahun, 10 tahun dan 15 tahun dengan asumsi besarnya land subsidence di Semarang 0,1 m/tahun. Hasil model test menunjukkan bahwa stabilitas struktur lapis lindung armor dengan kubus beton cukup tinggi, dibuktikan dengan kerusakan struktur (damage level) yang cukup rendah (NoD<0.5) pada seluruh kondisi skenario pengujian. Limpasan mulai terjadi pada skenario LS 10, LS 15 dan LS 15 120% masing-masing sebesar 1.192 lt/dt/m, 6.588 lt/dt/m dan 20.215 lt/dt/m. Limpasan yang terjadi tersebut dapat dikategorikan secara fungsional tidak aman untuk kendaraan (unsafe at any speed) sedangkan untuk kondisi struktur dikategorikan tidak ada kerusakan (no damage). Oleh karena itu perlu dilakukan evaluasi menyeluruh terkait stabilitas dan ketinggian/kebutuhan elevasi puncak tanggul setelah masa layanan 10 tahun. ABSTRACT The implementation of a detailed test model for the design of the Semarang sea wall was carried out to determine the level of stability of the sea dike structure in the form of cube-shaped concrete block armor with 1 m side. Besides, a test model was also conducted to evaluate the elevation of the sea dike against various wave conditions and increase in water level due to land subsidence. The Semarang sea wall was designed to with stand waves and tides, as well as toll roads, so that the model test was carried out to test the stability of the protective and runoff layers. There are 5 test scenarios carried out, namely LS01, LS05, LS10, LS15 and LS15-120% where each scenario shows land subsidence that occurs after 1 year, 5 years, 10 years and 15 years assuming the amount of land subsidence in Semarang 0 , 1 m / year. The test model results show that the stability of the protective armor structure with the concrete cube is quite high, as evidenced by the damage level which is quite low (NoD <0.5) in all conditions of the test scenario. Runoff starts in the LS 10, LS 15 and LS 15 scenarios 120% for 1,192 lt / dt / m, 6,588 lt / dt / m and 20,215 lt / dt / m, respectively. The runoff that occurs can be categorized functionally unsafe for vehicles in status (unsafe at any speed) while for the condition of the structure it is categorized as no damage. Therefore, a comprehensive evaluation of the stability and elevation / peak elevation needs of the embankment needs to be carried out after a 10-year service period.

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APA

Suprapto, S., & Ginting, J. W. (2019). Model Test Details Design Semarang Sea Dike. JURNAL TEKNIK HIDRAULIK, 9(2). https://doi.org/10.32679/jth.v9i2.530

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