Specification for Tunnelling, 3rd Edition by The British Tunnelling Society

By The British Tunnelling Society

The BTS Specification for Tunnelling has turn into the traditional rfile for tunnelling contracts, and kinds the root of tunnelling requirements for tasks in the course of the international. The specification has been revised during this 3rd variation to mirror present top perform and to take account of the numerous advances within the box of tunnelling that have happened over the past decade. insurance of sprayed concrete has been improved in acceptance of its elevated utilization world wide and there are new sections on sprayed utilized water resistant membranes and jacked field tunnelling. All references to codes, criteria and different layout files were comprehensively up-to-date

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X X X X X X X Excessively high measurement frequency may result in data overload problems if data is acquired faster than it can be processed and interpreted. There have been instances of tunnel collapse for which subsequent investigation revealed that the signs of imminent failure had been detected, but not interpreted and acted upon in adequate time. Excessive monitoring frequencies may also lead to wear issues in some systems. g. wear of robotic theodolites and overheating of sensors such as vibrating wire instruments).

No risk assessment or workshops) that could identify what needs to be monitored during construction; poor or hurried design planning for the project; the late development of a procurement strategy for the project; the delegation of monitoring to the main (principal) contractor. Human factors Isolation of monitoring design from main works design X Operation being willing to tender. There may be a likelihood of nonconforming bids that may often be cheaper but may not address all the intended designer requirements.

The zone of influence shall also determine where stable reference targets and benchmarks can be sited/located. 031 Appendix B Monitoring system specification checklists These checklists are intended for use as an aide-memoire by those responsible for specifying, designing and operating a monitoring system. They are intended to provide a means of verifying that the main issues highlighted in this guide have received appropriate consideration. The items in the checklists are grouped into logically related issues.

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