Stabilising Hooley Cutting Merstham - surrey

Hooley cutting on the London to Brighton mainline is a place hemmed in by houses on both sides these two huge cuttings and tunnels form a vital link between London, Gatwick Airport and the south coast and yet it is also a place synonymous with bad weather line closures.

December 2012 saw a plan to change all of this by inserting over 600 soil nails into the walls of the cutting and then installing a high tensile net over them which would then catch any slippages before they happened.

As the preferred plant supplier TRS worked very closely with the soil nailing contractor BAM Ritchie’s to develop a machine that could make this happen whilst working of the rail head.

Thus the Giga long arm (piling) was developed. Taking existing long arm technology this new arm was developed to incorporate an extra fitting point to allow the hydraulic ram to articulate and with the addition of strengthening plates inside the arm the new arm could withstand any flexing caused by the torque motors of today’s railway.
The job ran for a period of 8 days over the Xmas / New Year of 2012/13 and was a complete success with the line being reopened to the public with no disruptions.