TWf 66th quarterly meeting and 14th AGM

Overview

At this event you'll hear from Hewson Consulting Engineers on launched bridge design. Matthew Baxman has recently prepared an article on this subject, drawing on his temporary works experience gained on multiple bridge launches for HS2 over the last few years. The article explores the technical, practical, and contractual complexities involved in designing launched bridges, focusing particularly on composite deck structures.  

Craig Capewell of the Robertson Group and Andrejs Rjabkovs of Edge Consulting Engineers will present on RACC projects - documenting how the decision-making process on a live hospital site facilitated the deployment of innovative systems conducive to structural and environmental limitations and demonstrating how, through multi-party collaboration, non-standard solutions have transitioned from a flippant comment to a viable effective temporary roofing system. 

Plus, Aaron Lucid of  Vemaventuri GmbH, a PERI partner company, will present on the Impact of Modern Concretes on CIRIA Report 108 Rate-of-Rise Assumptions. There will be a brief review of CIRIA Report 108 assumptions on rate of rise, temperature and concrete grouping, and how these relate to today’s mix designs.

He'll also discuss how modern ultra-low carbon and low-heat concretes with slower hydration, altered temperature profiles and extended fluid behaviour are challenging traditional pressure envelopes. You'll learn about self-compacting and rheotropic concretes: thixotropy, prolonged hydrostatic conditions and non-linear solidification rates versus temperature. Plus, real-time use of embedded sensors to monitor formwork pressure, validate or contradict model predictions and capture construction-stage behaviour. Finally he'll expand on site practices that drive pressures beyond model expectations, including: 

• Over-compaction/re-energising lower lifts 
• Pumping at high pressures and bottom-up placing 
• Irregular pour rates and delays between lifts. 

The aim: to prompt a discussion within the Temporary Works forum on whether current use of CIRIA Report 108 remains conservative for modern and ultra-low carbon concretes, and how monitoring data should inform future guidance.

In person attendance for this meeting is now full. Please contact the TWf directly if you have any queries.

Programme