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| 4 November 2024 - A photo of the visiting delegation in front of the TBM's cutterhead. Source: Facebook |
Contract P103 has reached another milestone with the assembly of tunnel boring machine (TBM)'s cutterhead. Various parts of the machine's shield have already been lowered into the launch shaft which is located outside Pasir Ris camp. Some further assembly is still required before the machine will be launched for its first 3.4km drive towards Punggol station, where it is expected to arrive in mid-2026.
Subsequently, the same machine - named Elizabeth - will be brought back to the same site and launched in the opposite direction to complete the remaining 900m drive towards Elias station. TBM Elizabeth is a 12.6m diameter TBM, meaning that she will bore a single tunnel that will be used to house two tracks within.
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| 10 October 2023 - A model of TBM Elizabeth seen during the section's groundbreaking ceremony last year. |
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| 10 October 2023 - Details on TBM Elizabeth's model. |
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| 10 October 2023 - A cross section of the single large diameter bored tunnel housing two tracks. |
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| 18 April 2024 - A view of the tunnel profile for TBM Elizabeth, seen at a display panel at the CPE PIC. |
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| 29 August 2024 - A view of the launch shaft area. Parts of the TBM can be seen under blue protective covers. |
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| 29 August 2024 - A close up view of the TBM parts awaiting assembly. |
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| 29 August 2024 - A close up view of a section of the launch shaft site. |
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| 4 November 2024 - An aerial view of the TBM within the launch shaft. The tunnel opening can be seen to the left of the shaft. Source: Facebook |
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| 4 November 2024 - A view of the delegation at the bottom of the launch shaft. Also in view is the screw conveyor which will assist to extract soil from the cutterhead chamber at the front of the TBM for removal from the launch shaft. Source: Facebook |
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| 4 November 2024 - Another aerial view of the TBM towards the back. The segment erector and driving pistons will be located behind here. Source: Facebook |
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| 4 November 2024 Source: Facebook |
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| 4 November 2024 - Part of the conveyor system to extract soil from the launch shaft in view. Source: Facebook |
Contract P103 is the second large diameter bored tunneling contract to be won by the joint venture between Taisei Corporation and China State Construction & Engineering Corporation (CSCEC), the other contract being Contract CR105 for a large diameter bored tunnel between Aviation Park and Loyang stations.
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