Two appliances and crews from West Ashland, one from Aylesbury, along with two officers attended.
A gas main was well alight on arrival, it had spread to a small digger.
The firefighters used two sets of breathing apparatus, one main jet, two hose reel jets, two ground monitors.
A man was passed into the care of South Central Ambulance Service.
The digger was 100 percent destroyed by the fire.
Crews remained at the scene while the National Grid isolated the electric supply.
