Author: Lok, T S
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Lok, T S
The Jurong Island formed by the amalgamation of seven existing islands off Jurong was an attempt by the Singapore Government to create a world class petroleum and chemical industry on the island. The design and construction of a road link to connect the Jurong Island to the mainland was completed with a series of precast gravity caissons. The foundation of the caissons consisted of a layer of stone sill on prepared seabed using dredging. In view of the short overall contract period (24 months), it was most important to ensure that the 96 reinforced concrete caissons be fabricated and installed on time without causing any delay to the subsequent activities such as sand filling which was forming the core of the causeway. Based on the detailed scheduling, it required 12 months to fabricate the 96 caissons. Therefore special fabrication and launching methods were used to overcome the extremely short construction period. This paper describes the construction methods adopted in this project for the fabrication, moving and launching of reinforced concrete caissons by using stationary slipform, Aerogo heavy lift and transfer system, and the floating dock. Seow Kiat-Chuan, PEng, MSc, BEng CPG Consultants Pte. Ltd Choi Sung-Pil, BSc, MKSCE CPG Consultants Pte. Ltd Pang Poh Yong, PEng, BEng, PGD CPG Consultants Pte. Ltd Jimmy Tsen Chee Nam, BEng, MSc (Civ Eng), MSc (Highw Eng) CPG Consultants Pte. Ltd Lim Peng-Hong. MConsE, MSc, DIC, PEng, MIES, BEng CPG Consultants Pte. Ltd
Methods of adding more storeys to an existing building are briefly described. Strengthening of foundations by addition of micropiles and pre-loading is illustrated. Strengthening of existing reinforced concrete columns by plate bonding, reinforced concrete jacketing and polymer impregnation are discussed. The concept and method used for the addition of 14 storeys to an existing hotel and shopping centre has been described. C. K. Murthy, BE (Mys), PhD, FIE(I), FIES, MConsES, MASCE, MSIBL, PEng CKM Consultants Pte Ltd, Singapore A. Murthy, BEng, MIES, PEng CKM Consultants Pte Ltd, Singapore