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Vibration must be considered during temporary works design

Temporary works designers must consider noise and vibration at the design stage on all basement projects, according to Morrisons Solicitors partner Matthew Hearsum.

Speaking at the company’s Basement Extension Conference yesterday, Hearsum said that mitigation against noise and vibration effects from basement work is often an afterthought.

“Specialist input at the temporary works design stage is essential to avoid lawyers being involved at a later stage,” he said. “Too many legal disputes arise from mitigation not being built into the design.

“The focus for vibration is often on whether it will cause building damage but humans are far more sensitive that buildings and steps must be taken at the design stage to reflect this.”

Arup associate director Stuart Hardy also spoke at the event and shared recent experience of basement construction works on a major London residential scheme and for the Victoria and Albert Museum. According to Hardy, ground movements experienced during piling for the museum project may have been triggered by the auger advancing ahead of the casing in the River Terrace Gravel and tighter control on the piling technique and additional propping to reduce ground movement during excavation was needed to allow the project to be delivered safely.

Hardy added that residential project highlighted the need for sensible decision making regarding instrumentation and monitoring and an understanding of the seasonal effects on existing buildings. 

Want to know more about construction of basements? Join GE for its annual Basements and Underground Construction event in London on 5 October. Full details are available on the event website and a 25% discount is available on the delegate rate with the code BASE25

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