A77 Maybole bypass, South Ayrshire

We deployed our tracked paver and Multiplex Ski averaging beam level equipment to ensure tight level tolerances were achieved.

The project scope

This project comprised the construction of a new 5.2km single carriageway bypass at Maybole, South Ayrshire and included the construction of 3 new roundabouts, 3 underpasses and 3 new over bridges. Our scope of work included the installation of 65,000Te of surfacing material to construct the road from subbase level using the following materials:

• AC32 HDM Base 40/60 Des CI929
• AC20 HDM Binder 40/60 Des CI929
• HRA 30/14 CI911TS
• AC14 CGSC 100/150 CI912

Challenges & successes

The project required the use of our specialist surfacing equipment to achieve the required level tolerances and to provide superior surface comfort for the road users. The use of our tracked paver provided better traction and level control when laying material on the aggregate subbase and we also used our Vogele Multiplex Ski paver levelling attachment to achieve a superior average level on the road surface.

The Multiplex Ski beam is fitted with three-five multi-cell sonic sensors which enables it to scan a reference at several points located at a distance from one another – allowing the Niveltronic Plus System for Automated Grade and Slope Control to calculate a mean from the measurements taken across the entire measuring range, making up for any unevenness over long distances. In this way, the system operates with much greater precision than an individual single-cell or multi-cell sensor and provides a better road surface with higher average level tolerances.