A. Tatang Dachlan
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PRE-FEASIBILITY OF MALACCA STRAIT CROSSING M. Sjahdanulirwan; A. Tatang Dachlan
Jurnal Jalan-Jembatan Vol 27 No 1 (2010)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Abstract

Indonesian trading development rapidly shows an improvement with neighbour countries such as Malaysia and Singapore. Even though the transportation infrastructures arround Malacca Straits are currently just provided by boats. For balancing the develpoment trading reasons, Indonesian Government concerns to facilitate the building of transportation infrastructures or a fix-link infrastructure, a crossing bridge between Sumatera island (Indonesia) and Malaysia. Malacca Strait Bridge (MSB) between Indonesia and Malaysia is a part of Trans Asia road link, has been planned since years ago. To support the current planning, the Research and Development Agency – Ministry of Public Works – Republic of Indonesia (Badan Penelitian dan Pengembangan, Kementerian Pekerjaan Umum, Indonesia) needs to make a reviewing on a pre-feasibility study (Pre FS) for MSB. Pre FS activity involved many disciplines of knowledge especially for road/corridor, transportation, bridge, geotechnical, sea shore, environment, and social-economic-culture-policy. Pre-FS results that break event point for Corridor I among Dumai-P.Rupat-P.Medang-Malaysia may be expected between 25 and 30 yeras based on Benefit Cost Ratio methode, using cable stayed and suspension bridges and girders. The longest span for cable stayed and suspension bridges are 2600 m and 1280 m respectively. The selected corridior must be intensively discussed about technology absorbed and safety factor, resources capability for maintenance, integration within toll road network, foundation technology in the sea, and users psychology and comfort. Consession for operator may apply for 30 to 40 years. Keywords: Pre-feasibility study, Strait crossing, Strait bridge, Strait tunnel, Malacca strait bridge, Benefit cost ratio (BCR)
METODE PELAKSANAAN DAN EVALUASI PERBAIKAN JALAN BETON DENGAN INJEKSI SEMEN, COR DI TEMPAT DAN BETON PRACETAK A. Tatang Dachlan
Jurnal Jalan-Jembatan Vol 27 No 2 (2010)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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The road concrete pavements for high volume traffic load in Indonesia are mostly faced to the unstable base layer and eroded drainage factor then fallout deterioration such as irregular cracks, pumping, spalling ad faulting. The effect of those factors may appear propagation cracks or depression that needs demolition of whole concrete or apart of panel for repairing. The process requires a fast way repair, without hampering the flow of traffic. The defect must be identified causes and conditions carefully by means of visual condition assessment and mapping, deflection test with Falling Weigt Deflectometer (FWD), and sampling with core drill prior to repair. Based on the trials of concrete pavement suffers by pumping and depression, handling of the injected liquid cement ixed with a certain additive material, may reduce differential deflection so the slab is stable. Another repairs is the panel was removed and replaced with cast-in-place concrete using concrete mix that was given an additive to accelerate the hardening reaches 80% design strength, and within 3x24 hours can be immediately opened to traffic. The broken slab may also directtly be repalced using precast concrete with an appropriate dimension, the process is relatively fast then the traffic may immediately be opened. Monitoring result in improvements at the end of the first year, in the joint after grouting based on deflection criteria showed no indication of voids with a deflection of less than 0.05 mm (2 mils), and load transfer efficiency of more than 60%. This perform is usefull on preservation system of concrete pavement in Indonesia. Key words : pavement repairs, concrete pavement, segment cast in place, cement injection, precast concrete slab.
KAJIAN LAPANGAN PERKERASAN JALAN BETON PRACETAK DI INDONESIA A. Tatang Dachlan
Jurnal Jalan-Jembatan Vol 26 No 2 (2009)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Abstract

To improve the application of the precast concrete pavement more efficient and ensure well quality, Research and Development Centre For Road and Bridge (RDCRB) has studied the development of precast cement concrete in several agencies of some developed countries, and performs monitoring of precas concrete pavement in Indonesia such asat Busway lane and Cakung-Cilincing road link in Jakarta, and toll road link at Kanci-Pejagan, Cirebon, West Java. To find out the performance, visual surface pavement condition survey, vertical deflection measurement and road roughness survey were carried out. The result shows that in the first year the pavement proved relatively strong to support heavy traffic load, although at some joints and edges of panels have surface and edge defects that caused significantly high deflection and roughness. Surface roughness arround 2,3 m/Km at Kanci-Pejagan is relatively good. RDCRB have studied small scale in the laboratory using two joints variations. The performance of joints is then examined to vertical and horizontal deformation, and the result shows safe deformation. The evaluation result will be applied on the field trials of precast concrete by RDCRB. Keywords: precats concrete, prestress, precast-prestress, panel, vertical deflection