Propping and monitoring flyover during remedial works

Hammersmith Flyover, London

Project Overview

Location	Hammersmith Flyover, London
Sector	Highways
Products	Propping & Jacking Structural Monitoring

Completed in 1961, the Hammersmith flyover in west London carries the A4 arterial road over and to one side of the central Hammersmith gyratory system.

It’s one of the first examples of an elevated road using reinforced concrete.

The challenge

It was identified that the flyover needed essential repair work carrying out, which required the structure to be propped before any work could begin

We were awarded a contract by Amey PLC to design and install a propping and monitoring system for the duration of the remedial works.

Historic Elevated Structure

Completed in 1961, the Hammersmith Flyover carries the A4 over the central Hammersmith gyratory in west London. As one of the earliest reinforced concrete elevated roads, it forms a key part of the capital’s transport network.

Essential Repair Works

Inspections identified the need for significant remedial works, requiring the structure to be fully propped before repairs could begin.

Propping & Monitoring System

Appointed by Amey PLC, we designed and installed a comprehensive propping and structural monitoring solution to ensure safety and stability throughout the works.

Our solution

We installed Superprop, our strongest propping system, with integrated hydraulics used to maintain the loads of the structure. Our monitoring solution made sure that no undue stresses were applied to the structure.

The readings from the hydraulic cylinders were fed back to the load monitoring system, which alerted the engineering teams if the loads exceeded the strict parameters.

Learn more about propping & jacking

In addition to the pressure monitoring, temperature sensors were also positioned onto the props to compensate for any changes to the data caused by thermal factors.

The data collected on site was presented to engineers in real-time, allowing prompt action should loads change unexpectedly.

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