Achieving a watertight environment in a tunnel is essential for the smooth, safe running of the project during construction and operation. Assistant Editor Tristan Thomas looks at some of the waterproofing options available. Compared to the overall construction costs of a tunnelling project, the process of waterproofing a tunnel involves almost negligible expense. But this is not to under-rate the importance of incorporating a durable and reliable waterproofing system. Waterproofing is a necessity, not only to protect the tunnel interior from water ingress but also to protect the surrounding environment from water egress caused by activities associated with the construction and operation of the tunnel.
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