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Nurlia Sadikin
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Civil Engineering, Building, Construction & Architecture Engineering

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ANALISIS STATIK DAN DINAMIK RETAKAN MEMANJANG DI PUNCAK BENDUNGAN SUTAMI Dery Indrawan; Mahdi Ibrahim Tanjung; Haris Eko Setyawan; Nurlia Sadikin
JURNAL TEKNIK HIDRAULIK Vol 6, No 1 (2015): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1784.991 KB) | DOI: 10.32679/jth.v6i1.514

Abstract

Bendungan Sutami merupakan bendungan urugan batu dengan inti lempung dan memiliki tingkat keamanan risiko tinggi. Permasalahan retakan memanjang di puncak Bendungan Sutami sudah terjadi pada saat konstruksi, yaitu tahun 1969-1971, retakan pada masa konstruksi terjadi pada pertemuan filter dan inti lempung, kemudian diantisipasi dengan membasahi lapisan filter sehingga material filter menyesuaikan diri dan menutup retakan. Setelah beroperasi selama 42 tahun pada tahun 2014 ditemui adanya retakan memanjang di puncak bendungan sepanjang 120 m dengan kedalaman antara 1,5 2,0 m dari permukaan. Selain itu, berdasarkan studi kegempaan terbaru (peta gempa 2010) menunjukan tingkat bahaya gempa untuk skenario Safety Evaluation Earthquake (SEE) di Indonesia meningkat, dikhawatirkan retakan yang terjadi berpengaruh terhadap perilaku bendungan pada saat gempa. Oleh karena itu perlu adanya kajian perilaku Bendungan Sutami akibat gempa dengan mempertimbangkan adanya retakan. Tulisan ini berisi pemodelan numerik dengan analisis statik dan dinamik guna mengetahui penyebab dan mekanisme retakan yang terjadi serta memeriksa keamanan Bendungan Sutami akibat gempa pada skenario SEE. Analisa statik dan dinamik tubuh bendungan dilakukan dengan menggunakan perhitungan numerik berbasis finite element. Hasil analisa dinamik skenario SEE diketahui bahwa lereng hulu kemungkinan akan mengalami masalah stabilitas lereng. Meski demikian besaran deformasi yang terjadi relatif kecil, yaitu 16,3 cm. Dengan demikian dapat disimpulkan bahwa tubuh Bendungan Sutami aman terhadap skenario gempa SEE.
PEMETAAN KONDISI BAWAH PERMUKAAN DENGAN METODE GEOFISIKA (STUDI KASUS: BENDUNG PASARBARU, TANGERANG) Adang S. Soewaeli; Nurlia Sadikin
JURNAL TEKNIK HIDRAULIK Vol 5, No 2 (2014): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1585.081 KB) | DOI: 10.32679/jth.v5i2.303

Abstract

STABILITAS BENDUNGAN BETON BERDASARKAN ANALISIS DINAMIK METODA TIME HISTORY Nurlia Sadikin
JURNAL TEKNIK HIDRAULIK Vol 5, No 1 (2014): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v5i1.286

Abstract

Foundation Technology Development Of Hydraulic Structure On Peat Soil Mahdi Ibrahim Tanjung; Nurlia Sadikin; Dery Indrawan
JURNAL TEKNIK HIDRAULIK Vol 7, No 2 (2016): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1406.192 KB) | DOI: 10.32679/jth.v7i2.563

Abstract

Many hydraulic structures in Indonesia are built on peat soil, especially in Sumatra, Kalimantan and Papua. This soil has bad geotechnical characteristic for building foundation, because its low of shear strength, high potential of land subsidence and consolidation occured in a long term. One way to overcome this issues is using pile foundation. Therefore, a research was conducted in order to found foundation technology of hydraulic structure for peat soil using cerucuk, sand pile and concrete pile. This development of technology being conducted using geotechnical investigation and numerical modeling. The usage would be more effective when embankment strain is distributed evenly and not concentrated on the center of embankment. The search of alternative foundation is narrowed to the efficiency of the foundation design and the methods of implementation. Physical model results show that support capacity of the pile did not significantly increased in every increment in length, the increase instead happened when the tip of the pile deep in mineral soil layer below the peat layer. The foundation type made of concrete firmly in place give a supporting capacity 4 times compared to pile, while combination of pile with sand increase the pile supporting capacity to 2 times only, and pile of sand covered with PVC pipe has a supporting power that is almost the same with pile. Based on that, the concrete foundation type casted in place can be substitute alternative for pile.
Penerapan Peralatan Georadar Sebagai Teknologi Pendukung Pemantauan Perilaku Bendungan Studi Kasus: Bendungan Cacaban, Jawa Tengah Nurlia Sadikin
JURNAL SUMBER DAYA AIR Vol 7, No 1 (2011)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2034.221 KB) | DOI: 10.32679/jsda.v7i1.375

Abstract

Dam is a quite complex and highly risky building in the case of failure or damage, therefore continuously monitoring should be carried out in order to monitor the behavior of the dam. The development of science and technology has provided supporting methods of investigating the performance of hydraulic structures. The existence of cavities which can lead to seeps and detection of damages by seepage on earlier phases in dams could be detected by georadar. On August 2010, implementation of georadar application was conducted into Cacaban Dam, Central Java. There were suspections of seepage in the lower side of the dam body. Measurement lines used for georadar were 6 lines along the dam body and 4 lines across the spillway. The results showed that in the dam body the soil was divided into 2 layers, the top layer showing color variation while the lower layer was homogeneous. On the spillway, results of georadar investigation also showed that the soil was divided into 3 layers. The top and middle layers show color variations, which the middle layer was more contrast and varied and the bottom layer was homogeneous. Deviations showed between the theoretical phreatic lines with phreatic line of piezometers and measured by georadar. These deviations occurred due to the reflector amplitude value and variation of density levels inside theembankment.
Co-Authors Adang S. Soewaeli Dery Indrawan Haris Eko Setyawan Mahdi Ibrahim Tanjung