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List of products by author: S. Y. Tong
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Construction Experiences from Cross Passage in Very Hard Rock and Blasting Works near Segmental Lining
Abstract: 2.3km long twin bored tunnels were constructed in one of the contracts under DTL2 which is located in the western part of Singapore. After the construction of twin tunnels namely Expo Bound and Bukit Panjang Bound tunnels, 7 numbers of cross passages were constructed by mining. These cross passage will serve as a fire escape passage way between the Expo and Bukit Panjang Bound tunnels. The...
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Tunnelling in Mixed Ground Condition - A Challenge to Design and Construction
Abstract: In one of the civil contracts of Downtown Line 2 in Singapore, the construction of twin bored tunnels was conducted using Slurry TBMs. The TBM drives faced challenges involving high abrasivity and high permeability of the Bukit Timah Granite Formation. Due to its variability of weathering properties, such geological formation often leads to frequent cutter-head interventions and other...
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